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CN111853043A - Cold-rolled seamless steel tube for automobile transmission shaft and preparation process thereof - Google Patents

Cold-rolled seamless steel tube for automobile transmission shaft and preparation process thereof Download PDF

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Publication number
CN111853043A
CN111853043A CN202010560212.0A CN202010560212A CN111853043A CN 111853043 A CN111853043 A CN 111853043A CN 202010560212 A CN202010560212 A CN 202010560212A CN 111853043 A CN111853043 A CN 111853043A
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CN
China
Prior art keywords
seamless steel
sliding
wheel
steel tube
shaft
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010560212.0A
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Chinese (zh)
Other versions
CN111853043B (en
Inventor
杜海滨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jiuding Machinery Co ltd
Original Assignee
Zhejiang Jiuding Machinery Co ltd
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Priority to CN202010560212.0A priority Critical patent/CN111853043B/en
Publication of CN111853043A publication Critical patent/CN111853043A/en
Application granted granted Critical
Publication of CN111853043B publication Critical patent/CN111853043B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/03—Shafts; Axles telescopic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/40—Shaping by deformation without removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/40—Shaping by deformation without removing material
    • F16C2220/44—Shaping by deformation without removing material by rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/60—Shaping by removing material, e.g. machining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/60—Shaping by removing material, e.g. machining
    • F16C2220/62—Shaping by removing material, e.g. machining by turning, boring, drilling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/36—Material joints by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2235/00—Cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Forging (AREA)

Abstract

The invention discloses a cold-rolled seamless steel tube for an automobile transmission shaft and a preparation process thereof, and the cold-rolled seamless steel tube comprises a first seamless steel tube body, a second seamless steel tube body, a telescopic sleeve and a first flange, wherein the second seamless steel tube body is positioned in the first seamless steel tube body, one end of the first seamless steel tube body is provided with a connecting shaft, one end of the connecting shaft is connected with the telescopic sleeve, the other end of the connecting shaft is respectively and fixedly connected with the first seamless steel tube body and the second seamless steel tube body, the other end of the first seamless steel tube body is provided with a forked frame, one end of the first seamless steel tube body and one end of the second seamless steel tube body are both fixedly connected with the connecting shaft, the other end of the first seamless steel tube body is fixedly connected with the forked frame, the other end of the second seamless steel tube body is detachably connected with the forked frame, a cross shaft is, the first flange is connected with the second flange through threads. The invention has the beneficial effects that: the strength of the automobile transmission shaft is enhanced.

Description

Cold-rolled seamless steel tube for automobile transmission shaft and preparation process thereof
Technical Field
The invention relates to the technical field of seamless steel pipes, in particular to a cold-rolled seamless steel pipe for an automobile transmission shaft and a preparation process thereof.
Background
The seamless steel pipe is made of a whole metal and has no seam on the surface, and is widely used for manufacturing structural parts and mechanical parts, such as petroleum drill pipes, automobile transmission shafts, bicycle frames, steel scaffold used in building construction and the like, and annular parts are manufactured by using the steel pipe, so that the material utilization rate can be improved, the manufacturing process is simplified, and the materials and the processing time are saved. The automobile transmission shaft is a rotating body with high rotating speed and few supports, and is easy to break off in the running process, so that the strength of the seamless steel tube needs to be improved, and the strength of the automobile transmission shaft is enhanced.
Disclosure of Invention
The invention provides a cold-rolled seamless steel tube for an automobile transmission shaft, which has high strength and is not easy to break and a preparation process thereof, aiming at overcoming the defects of low strength and easy breakage of the automobile transmission shaft in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cold-rolled seamless steel tube for an automobile transmission shaft comprises a first seamless steel tube body, a second seamless steel tube body, a telescopic sleeve and a first flange, wherein the second seamless steel tube body is positioned in the first seamless steel tube body, one end of the first seamless steel tube body is provided with a connecting shaft, one end of the connecting shaft is connected with the telescopic sleeve, the other end of the connecting shaft is fixedly connected with the first seamless steel tube body and the second seamless steel tube body respectively, the other end of the first seamless steel tube body is provided with a fork-shaped frame, the fork-shaped frame is U-shaped fork-shaped, one end of the first seamless steel tube body and one end of the second seamless steel tube body are fixedly connected with the connecting shaft, the other end of the first seamless steel tube body is fixedly connected with the fork-shaped frame, the other end of the second seamless steel tube body is detachably connected with the fork-shaped frame, a cross shaft is arranged in the fork-shaped frame, and, the fork-shaped frame is connected with a flange II matched with the flange I through a cross shaft, and the flange I is connected with the flange II through threads.
The seamless steel tube body two is located seamless steel tube body one, the one end of seamless steel tube body one is equipped with the connecting axle, the one end and the flexible cover of connecting axle are connected, the other end of connecting axle respectively with seamless steel tube body one and seamless steel tube body two fixed connection, the other end of seamless steel tube body one is equipped with the forked frame, the shape of forked frame is U type fork form, the one end of seamless steel tube body one and the one end of seamless steel tube body two all with connecting axle fixed connection, the other end and the forked frame fixed connection of seamless steel tube body one, the other end and the forked frame of seamless steel tube body two can be dismantled and be connected, be equipped with the cross in the forked frame, the cross is connected with the upper and lower both ends threaded connection of forked frame, the forked frame is connected with flange two with flange one assorted through the cross, flange one passes through threaded connection with flange two. In the prior art, the automobile transmission shaft is made of a single seamless steel pipe for transmission and is easy to break, and the two seamless steel pipes are adopted in the invention, so that the strength of the automobile transmission shaft is greatly enhanced, and the purposes of high strength and difficulty in breaking are achieved.
Preferably, an external spline is arranged on the connecting shaft, an internal spline matched with the external spline is arranged in the telescopic sleeve, one end of the connecting shaft is installed in the telescopic sleeve in a matched mode through the external spline and the internal spline, the other end of the connecting shaft is fixedly connected with the first seamless steel tube body and is provided with a first connecting block, the first connecting block is located in the first seamless steel tube body, the connecting shaft is fixedly connected with a second seamless steel tube body through the first connecting block, the open end of the forked frame is connected with a second flange through a cross shaft, the bottom end of the forked frame is fixedly connected with the first seamless steel tube body and is provided with a second connecting block, the second connecting block is located in the first seamless steel tube body, a mounting groove matched with the second seamless steel tube body is formed in the second connecting block, the second seamless steel tube body is matched with the mounting groove. The through holes formed in the second seamless steel pipe body are beneficial to reducing the weight of the automobile transmission shaft, and high-speed rotation is facilitated while the strength of the transmission shaft is guaranteed.
Preferably, the cross shaft comprises a first shaft and a second shaft which are fixedly connected, the first shaft and the second shaft are perpendicular to each other and are in a cross shape, two ends of the first shaft are in threaded connection with the upper end and the lower end of the fork-shaped frame respectively, two rotating rods are arranged on one side of the second flange, the second flange is in rotating connection with two ends of the second shaft respectively through the two rotating rods, a plurality of convex strips are arranged on the other side of the second flange, and a plurality of grooves matched with the convex strips are formed in the first flange. When the transmission shaft is rotated, the first flange and the second flange are in threaded connection, and the raised lines on the second flange are matched with the grooves on the first flange, so that the deformation of the bolts can be prevented, and the strength of flange connection is greatly improved.
The invention also provides a preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft, which comprises the following steps:
step one, carrying out three-roller continuous rolling on a steel billet, and carrying out sizing test after extrusion;
secondly, detecting whether the outer surface has cracks, cutting off the steel billet after the outer surface is qualified and has no cracks, and performing centering treatment through a punching machine;
step three, heating the steel billet to carry out hot rolling and punching, and producing the steel billet into a hollow billet;
step four, pickling the steel billet by using liquid, observing whether a large number of bubbles are generated on the surface of the steel billet, and if no large number of bubbles are generated, judging that the quality of the steel billet reaches the standard;
Step five, carrying out primary cold rolling treatment on the steel billet, carrying out heat treatment after cold rolling, reducing the hardness of the processed pipe, and reducing the structure of the steel pipe;
sixthly, straightening the steel billet after the heat treatment;
cutting off the head and the tail of the billet, and chamfering the two ends of the billet;
eighthly, carrying out acid-phosphate soap lubrication treatment on the steel billet, and producing a finished product by using a two-roll cold rolling mill;
step nine, straightening the steel pipe by using a straightening machine;
step ten, the steel pipe is subjected to oil removal treatment in an oil removal cylinder to remove oil stains;
step eleven, soaking the steel pipe in anti-rust oil for rust prevention;
step twelve, carrying out eddy current and ultrasonic flaw detection treatment, detecting defects on the inner surface and the outer surface of the steel pipe, detecting tolerance sizes by using a micrometer and an inside diameter gauge, and respectively forming a first qualified seamless steel pipe body and a second qualified seamless steel pipe body, wherein the diameter of the second seamless steel pipe body is smaller than that of the first seamless steel pipe body;
step thirteen, drilling a plurality of uniformly distributed through holes on the seamless steel pipe body II through a drilling machine, and chamfering the edges of the through holes;
and step fourteen, fixedly connecting one end of the second seamless steel tube body with the first connecting block on the connecting shaft through welding, fixedly connecting one end of the second seamless steel tube body with the connecting shaft through welding, sleeving the forked frame on the other end of the second seamless steel tube body through the connecting block, and fixedly connecting the forked frame with the other end of the second seamless steel tube body through welding.
The transmission shaft is made of the first seamless steel pipe body and the second seamless steel pipe body, so that the strength of the transmission shaft is greatly improved, and meanwhile, a plurality of through holes are drilled in the second seamless steel pipe body, so that the weight of the automobile transmission shaft is favorably reduced, and the high-speed rotation is facilitated while the strength of the transmission shaft is ensured.
Preferably, the straightening machine comprises an operation table, the operation table is in a cuboid shape, a plurality of uniformly distributed support columns are arranged at the bottom of the operation table, conveying devices are arranged at two ends of the operation table, a turnover mechanism and a straightening area are arranged in the middle of the operation table, the turnover mechanism is positioned between one conveying device and the straightening area, a plurality of fixed wheels corresponding to the conveying devices and a plurality of sliding wheels corresponding to the conveying devices are arranged in the straightening area, the fixed wheels are uniformly distributed along the length direction of the operation table, the fixed wheels are mounted at the top of the operation table and are rotatably connected with the operation table, a first sliding groove is arranged on the side surface of each fixed wheel, a first air cylinder is arranged on one side of the first sliding groove, a plurality of fixed wheels are positioned on the other side corresponding to the first sliding groove, a first sliding block is arranged in the first sliding groove, the output end of the first air cylinder is fixedly connected with the, a plurality of movable pulley is installed on slider one and along the length direction evenly distributed of operation panel, and movable pulley and a slider rotate and be connected. An operator places the head end of the seamless steel pipe on a conveying device far away from the turnover mechanism to clamp and convey the seamless steel pipe in the forward direction, then starts a first air cylinder to push a sliding wheel to move to one side of a fixed wheel so that the sliding wheel moves to a proper position, straightens the two sides of the seamless steel pipe and then sequentially passes through the turnover mechanism and the conveying device close to the turnover mechanism; when the tail end of the seamless steel tube is about to be separated from the conveying device far away from the turnover mechanism, starting the conveying device close to the turnover mechanism, and clamping the seamless steel tube to continue to convey forwards; after the tail end of the seamless steel tube is straightened through the straightening area, the turnover mechanism is started to clamp the seamless steel tube, the conveying device close to the turnover mechanism loosens the seamless steel tube, the turnover mechanism drives the seamless steel tube to rotate for 90 degrees, the conveying device close to the turnover mechanism clamps the seamless steel tube again, the turnover mechanism loosens the seamless steel tube, the conveying device close to the turnover mechanism reversely conveys the seamless steel tube, and the other two sides of the seamless steel tube are straightened; during reverse conveying, when the head end of the seamless steel pipe is about to break away from the conveying device close to the turnover mechanism, the conveying device far away from the turnover mechanism is started, the seamless steel pipe is clamped, and the seamless steel pipe is conveyed in the reverse direction continuously until straightening is finished.
Preferably, the operating table is provided with a first rectangular hole, one side of the first rectangular hole is close to the fixed wheel and the sliding wheel, the other side, corresponding to the first rectangular hole, is far away from the fixed wheel and the sliding wheel, a first supporting plate is arranged in the first rectangular hole, the first supporting plate is arranged on one side, close to the fixed wheel and the sliding wheel, in the first rectangular hole, the first supporting plate is provided with a first motor, the output end of the first motor is provided with a gear, the turnover mechanism is provided with a plurality of racks matched with the gear, and the gear is meshed with the racks. The first motor controls the rotation angle of the turnover mechanism through the meshing of the gear and the rack, and automatic operation is achieved.
Preferably, the turnover mechanism comprises a steering sleeve and a limiting pipe, the middle part of the limiting pipe is positioned in the steering sleeve, two ends of the limiting pipe are positioned outside the steering sleeve, the central shaft of the limiting pipe and the central shaft of the steering sleeve are on the same axis, two jaw assemblies are arranged on the inner side wall of the steering sleeve, the two jaw assemblies are distributed in a mirror image mode by taking the central shaft of the steering sleeve as the center, the cross section of the limiting pipe is oval, two rectangular holes II corresponding to the jaw assemblies are arranged on the limiting pipe, the length direction of each rectangular hole II is the same as that of the limiting pipe, one long edge of each rectangular hole II is positioned on the limiting pipe and far away from the central shaft of the rectangular hole II, the other long edge of each rectangular hole II is positioned on the limiting pipe and close to the central shaft of the rectangular hole II, the rectangular hole II is positioned in the steering sleeve, one end of each jaw assembly is fixedly connected with, the jaw assembly on the steering sleeve is rotatably connected with the limiting pipe through a second rectangular hole, one end of a first supporting plate is fixedly connected with one side, close to the fixed wheel and the sliding wheel, in the first rectangular hole, the other end of the first supporting plate is far away from the fixed wheel and the sliding wheel and is fixedly connected with a second supporting plate, one end of the second supporting plate is fixedly connected with the first supporting plate, the other end of the second supporting plate is provided with a first U-shaped supporting plate, the outer side of the bottom of the first U-shaped supporting plate is fixedly connected with the second supporting plate, the operating table is provided with a second U-shaped supporting plate, the outer side of the bottom of the second U-shaped supporting plate is fixedly connected with the operating table, the second U-shaped supporting plate is positioned at one side close to the fixed wheel and the sliding wheel, the size of the first U-shaped supporting plate is identical to that of the second U-shaped supporting plate, the inner side of the bottom, the other end of the steering sleeve is positioned between the two supporting plates III, one end of the steering sleeve is arranged on the U-shaped supporting plate I, the other end of the steering sleeve is arranged on the U-shaped supporting plate II, the racks are located on the outer side wall of the steering sleeve and located between the U-shaped supporting plate I and the U-shaped supporting plate II, and the racks are evenly distributed along the circumferential direction of the steering sleeve. In an initial state, the two clamping jaw assemblies are both positioned at positions far away from the central shaft of the limiting pipe, and the clamping blocks clamp the limiting pipe all the time; an operator places the head end of the seamless steel pipe on a conveying device far away from the turnover mechanism to clamp and convey the seamless steel pipe in the forward direction, then starts a first air cylinder to push a sliding wheel to move to one side of a fixed wheel so that the sliding wheel moves to a proper position, straightens the two sides of the seamless steel pipe and then sequentially passes through a limiting pipe and the conveying device close to the turnover mechanism; when the tail end of the seamless steel tube is about to be separated from the conveying device far away from the turnover mechanism, starting the conveying device close to the turnover mechanism, and clamping the seamless steel tube to continue to convey forwards; after the tail end of the seamless steel pipe is straightened through the straightening area, a first motor is started, the first motor is controlled to rotate a certain angle through the meshing of the gear and the rack, so that the two jaw assemblies are positioned at the position close to the central shaft of the limiting pipe and clamp the seamless steel pipe after being mutually closed, the conveying device close to the turnover mechanism loosens the seamless steel pipe at the moment, the first motor drives the first steering sleeve and the limiting pipe to continuously rotate 90 degrees, the conveying device close to the turnover mechanism clamps the seamless steel pipe again, the first motor controls the first steering sleeve to reversely rotate a certain angle, so that the two jaw assemblies are far away from each other and then return to the position far away from the central shaft of the limiting pipe again and loosen the seamless steel pipe, the conveying device close to the turnover mechanism reversely conveys the seamless steel pipe; during reverse conveying, when the head end of the seamless steel tube is about to be separated from the conveying device close to the turnover mechanism, the conveying device far away from the turnover mechanism is started, the seamless steel tube is clamped, and the seamless steel tube is conveyed in the reverse direction continuously until straightening is finished; the tension spring is convenient for the two clamping blocks to approach each other to clamp the limiting pipe; a rubber pad is arranged on the contact surface of the clamping block, which is in contact with the limiting pipe, so that the friction force between the clamping block and the outer side wall of the limiting pipe is increased, and the two clamping jaw assemblies can rotate to clamp or loosen the seamless steel pipe conveniently; the contact surface of the clamping block or the rubber pad and the limiting pipe can be arranged to be arc-shaped so as to increase the contact area of the rubber pad and the limiting pipe.
As preferred, the claw subassembly includes the claw head, flexible central siphon one and flexible central siphon two, the claw head is located spacing intraductal, the shape of claw head is rectangular shape, the length of claw head is greater than the length of rectangular hole two, one side of claw head is equipped with a plurality of rubber bumps, the opposite side and the flexible central siphon one fixed connection of claw head, the one end and the two sliding connection of flexible central siphon one, the other end of flexible central siphon one runs through rectangular hole two and claw head fixed connection, the one end and the telescopic inside wall fixed connection that turns to of flexible central siphon two, the other end and the flexible central siphon one sliding connection of flexible central siphon two, be equipped with spring one in the flexible central siphon one, the one end of spring one is located flexible central siphon one and with claw head fixed connection, the other end of spring one runs through flexible central siphon one and is located flexible central siphon two and with turn to telescopic inside wall fixed. The length of the claw heads is greater than that of the rectangular hole II, so that the claw heads on the two claw assemblies can be conveniently close to or far away from each other along with the inner side wall of the limiting pipe, and the seamless steel pipe can be clamped and loosened; when the claw heads clamp the seamless steel pipe, the first telescopic shaft tube is in contact with the long edge of the second rectangular hole, and the motor drives the steering sleeve to rotate for 90 degrees and simultaneously drives the limiting tube to rotate, so that the seamless steel pipe is driven to rotate for 90 degrees, and the other two sides of the seamless steel pipe are straightened; one side of the claw head is provided with a plurality of rubber bumps, so that on one hand, the friction force between the claw head and the outer side wall of the seamless steel pipe is increased, the seamless steel pipe is more stable and is not easy to fall off when rotating, on the other hand, the outer side wall of the seamless steel pipe can be prevented from being damaged, and the safety and the reliability are realized; the design of the first telescopic shaft tube, the second telescopic shaft tube and the first spring facilitates the claw head to better slide along the inner side wall of the limiting tube, and the design is reasonable and simple.
Preferably, the operating platform and the first sliding block are respectively provided with a plurality of rotating shafts, the fixed wheel is rotatably connected with the operating platform through the rotating shaft corresponding to the fixed wheel, the sliding wheel is rotatably connected with the first sliding block through the rotating shaft corresponding to the sliding wheel, the top end of the rotating shaft is provided with a limiting block, the limiting block is rotatably connected with the rotating shaft, the fixed wheel and the sliding wheel are both positioned at the bottom end of the rotating shaft corresponding to the fixed wheel and the sliding wheel, the rotating shaft is sleeved with a second spring, the fixed wheel and the sliding wheel are both connected with the corresponding limiting block through the second spring, the fixed wheel has the same shape and size as the sliding wheel, the fixed wheel comprises an upper wheel and a lower wheel, the upper wheel has the same shape and size as the lower wheel, the upper wheel and the lower wheel are vertically and symmetrically distributed, the upper wheel and the lower wheel are rotatably connected with the operating platform through the rotating shaft, the bottom of the upper wheel is close to the lower wheel, the top of the upper wheel is connected with the limiting block through a second spring. The fixed wheel and the sliding wheel clamp the seamless steel pipe and straighten the seamless steel pipe; the fixed wheel and the sliding wheel can rotate so as to facilitate the seamless steel pipe to be conveyed under the conveying of the conveying device; the second spring is convenient for the upper wheel to compress the seamless steel tube; the guide inclined plane is convenient for the seamless steel pipe to be inserted between the upper wheel and the lower wheel, and the operation is convenient.
Preferably, the top of the operating platform is provided with a U-shaped groove, the length direction of the U-shaped groove is the same as the width direction of the operating platform, the fixed wheel and the sliding wheel are both positioned between the first rectangular hole and the U-shaped groove, both ends of the operating platform are provided with mounting grooves, the conveying device is positioned in the mounting grooves and comprises a second sliding block and a fixed block, both the shape of the second sliding block and the shape of the fixed block are cuboid, the second sliding block and the fixed block are parallel to each other, both the length direction of the second sliding block and the length direction of the fixed block are the same as the length direction of the operating platform, both ends of the fixed block are respectively fixedly connected with the inner side walls at both sides of the mounting grooves, both sides of the mounting grooves are provided with rectangular sliding holes, two sliding blocks pass through the rectangular sliding holes to be slidably connected with the mounting grooves, the rectangular sliding holes are positioned at the side surfaces of the fixed block, the length, the other end of the transmission component penetrates through a corresponding rectangular sliding hole to be positioned outside one end of the operating platform, one end of a second sliding block on the other conveying device penetrates through a corresponding rectangular sliding hole to be positioned in the U-shaped groove, the other end of the transmission component penetrates through a corresponding rectangular sliding hole to be positioned outside the other end of the operating platform, air cylinders are arranged in the U-shaped groove, the rectangular hole and two ends of the operating platform respectively, the air cylinders are arranged on the side surfaces of the rectangular sliding holes, the output ends of the air cylinders are fixedly connected with the end parts of the corresponding second sliding blocks, the air cylinders in the rectangular hole are positioned on one sides, far away from the fixed wheel and the sliding wheel, of the rectangular hole, the sliding blocks and the fixed block are respectively provided with a transmission component, each transmission component comprises a driven rolling shaft, a driving rolling shaft, a conveying belt and a motor II, the motor II on one transmission component is arranged at one end, the second motor on the other transmission assembly is installed at one end of the second sliding block, the driven roller and the second sliding block on the transmission assembly are connected in a rotating mode and located at the other end of the second sliding block, the output end of the second motor is fixedly connected with the driving roller, the driving roller is connected with the driven roller through the conveying belt, one end of the conveying belt is sleeved with the driving roller, the other end of the conveying belt is sleeved with the driven roller, a plurality of uniformly distributed convex ribs are arranged on the conveying belt, the convex ribs are long in shape and made of rubber. The design of the conveying device is beneficial to conveying the seamless steel pipe with large curvature, and the application range is wide; the second air cylinder drives the sliding block to move towards the two-way fixed block through the output end to clamp the seamless steel pipe, and the second motor on the fixed block and the second motor on the sliding block drive the conveying belts to rotate oppositely so as to realize conveying of the seamless steel pipe; the convex ribs are made of rubber materials, so that the friction force between the conveying belt and the seamless steel tube is increased, and the seamless steel tube is convenient to convey.
The invention has the beneficial effects that: the strength of the automobile transmission shaft is greatly enhanced; the full-automatic straightening machine has the advantages that the full-automatic straightening is realized, the product quality is improved, the manual operation is not needed in the whole process, the automation degree is greatly improved, and the working efficiency is improved; the design of the conveying device is beneficial to conveying the seamless steel pipe with large curvature, and the application range is wide; safe and reliable, convenient operation, reasonable in design.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side view of the second flange of FIG. 1;
FIG. 3 is a schematic view showing the structure of a leveler;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
FIG. 5 is an internal structural view of the steering sleeve;
fig. 6 is an enlarged view of the structure at B in fig. 3.
In the figure: 1. the seamless steel pipe comprises a seamless steel pipe body I, a seamless steel pipe body II, a seamless steel pipe body 3, a telescopic sleeve, a flange I, a connecting shaft 5, a connecting shaft 6, a fork-shaped frame 7, a cross shaft 8, a flange II, a connecting block I, a connecting block II, a through hole 11, a shaft I, a shaft II, a rotating rod 14, a protruding strip 15, a groove 16, a groove 17, an operating platform 18, a conveying device 19, a turnover mechanism 20, a straightening area 20, a fixing wheel 21, a sliding wheel 22, a sliding chute I, a cylinder I, a sliding block II, a sliding block III, a clamping claw head 41, a claw head, 42. the automatic feeding device comprises a first telescopic shaft tube, 43, a second telescopic shaft tube, 44, a rubber bump, 45, a first spring, 46, a limiting block, 47, a second spring, 48, an upper wheel, 49, a lower wheel, 50, a guide inclined plane, 51, a U-shaped groove, 52, a mounting groove, 53, a second sliding block, 54, a fixing block, 55, a rectangular sliding hole, 56, a second air cylinder, 57, a transmission assembly, 58, a driven roller, 59, a driving roller, 60, a conveying belt, 61, a second motor and 62 convex ribs.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1, a cold-rolled seamless steel tube for an automobile transmission shaft comprises a seamless steel tube body I1, a seamless steel tube body II 2, a telescopic sleeve 3 and a flange I4, wherein the seamless steel tube body II 2 is positioned in the seamless steel tube body I1, one end of the seamless steel tube body I1 is provided with a connecting shaft 5, one end of the connecting shaft 5 is connected with the telescopic sleeve 3, the other end of the connecting shaft 5 is fixedly connected with the seamless steel tube body I1 and the seamless steel tube body II 2 respectively, the other end of the seamless steel tube body I1 is provided with a fork 6, the fork 6 is in a U-shaped fork shape, one end of the seamless steel tube body I1 and one end of the seamless steel tube body II 2 are both fixedly connected with the connecting shaft 5, the other end of the seamless steel tube body I1 is fixedly connected with the fork 6, the other end of the seamless steel tube body II 2 is detachably connected with the fork 6, a, the cross shaft 7 is in threaded connection with the upper end and the lower end of the forked frame 6, the forked frame 6 is connected with a flange II 8 matched with the flange I4 through the cross shaft 7, and the flange I4 is in threaded connection with the flange II 8.
As shown in fig. 1, an external spline is arranged on a connecting shaft 5, an internal spline matched with the external spline is arranged in a telescopic sleeve 3, one end of the connecting shaft 5 is matched with the internal spline through the external spline and is arranged in the telescopic sleeve 3, the other end of the connecting shaft 5 is fixedly connected with a first seamless steel tube body 1 and is provided with a first connecting block 9, the first connecting block 9 is positioned in the first seamless steel tube body 1, the connecting shaft 5 is fixedly connected with a second seamless steel tube body 2 through the first connecting block 9, the open end of a fork 6 is connected with a second flange 8 through a cross shaft 7, the bottom end of the fork 6 is fixedly connected with the first seamless steel tube body 1 and is provided with a second connecting block 10, the second connecting block 10 is positioned in the first seamless steel tube body 1, a mounting groove matched with the second seamless steel tube body 2 is arranged in the second connecting block 10, the second seamless steel, the second seamless steel tube body 2 is provided with a plurality of through holes 11 which are uniformly distributed.
As shown in fig. 1, the cross shaft 7 includes a first shaft 12 and a second shaft 13, the first shaft 12 is fixedly connected with the second shaft 13, the first shaft 12 and the second shaft 13 are perpendicular to each other and are cross-shaped, two ends of the first shaft 12 are respectively in threaded connection with the upper end and the lower end of the fork 6, one side of the second flange 8 is provided with two rotating rods 14, the second flange 8 is respectively in rotational connection with two ends of the second shaft 13 through the two rotating rods 14, as shown in fig. 1 and 2, the other side of the second flange 8 is provided with a plurality of protruding strips 15, and the first flange 4 is provided with a plurality of grooves 16 matched with the protruding strips 15.
As shown in fig. 1, 2 and 3, the invention also provides a preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft, which comprises the following steps:
step one, carrying out three-roller continuous rolling on a steel billet, and carrying out sizing test after extrusion;
secondly, detecting whether the outer surface has cracks, cutting off the steel billet after the outer surface is qualified and has no cracks, and performing centering treatment through a punching machine;
step three, heating the steel billet to carry out hot rolling and punching, and producing the steel billet into a hollow billet;
step four, pickling the steel billet by using liquid, observing whether a large number of bubbles are generated on the surface of the steel billet, and if no large number of bubbles are generated, judging that the quality of the steel billet reaches the standard;
step five, carrying out primary cold rolling treatment on the steel billet, carrying out heat treatment after cold rolling, reducing the hardness of the processed pipe, and reducing the structure of the steel pipe;
Sixthly, straightening the steel billet after the heat treatment;
cutting off the head and the tail of the billet, and chamfering the two ends of the billet;
eighthly, carrying out acid-phosphate soap lubrication treatment on the steel billet, and producing a finished product by using a two-roll cold rolling mill;
step nine, straightening the steel pipe by using a straightening machine;
step ten, the steel pipe is subjected to oil removal treatment in an oil removal cylinder to remove oil stains;
step eleven, soaking the steel pipe in anti-rust oil for rust prevention;
step twelve, carrying out eddy current and ultrasonic flaw detection treatment, detecting defects on the inner surface and the outer surface of the steel pipe, detecting tolerance sizes by using a micrometer and an inside diameter gauge, and respectively forming a first qualified seamless steel pipe body 1 and a second qualified seamless steel pipe body 2, wherein the diameter of the second qualified seamless steel pipe body 2 is smaller than that of the first qualified seamless steel pipe body 1;
step thirteen, drilling a plurality of uniformly distributed through holes 11 in the seamless steel pipe body II 2 through a drilling machine, and chamfering the edges of the through holes 11;
fourteen steps, one end of the second seamless steel tube body 2 is fixedly connected with the first connecting block 9 on the connecting shaft 5 through welding, one end of the second seamless steel tube body 1 is fixedly connected with the connecting shaft 5 through welding, then the forked frame 6 is sleeved on the other end of the second seamless steel tube body 2 through the first connecting block 10, and finally the forked frame 6 is fixedly connected with the other end of the second seamless steel tube body 1 through welding.
As shown in fig. 3, the straightening machine includes an operation table 17, the operation table 17 is rectangular, a plurality of support columns are uniformly distributed at the bottom of the operation table 17, a conveying device 18 is disposed at both ends of the operation table 17, a turnover mechanism 19 and a straightening area 20 are disposed in the middle of the operation table 17, the turnover mechanism 19 is disposed between one of the conveying device 18 and the straightening area 20, a plurality of fixed wheels 21 corresponding to the conveying device 18 and a plurality of sliding wheels 22 corresponding to the conveying device 18 are disposed in the straightening area 20, the plurality of fixed wheels 21 are uniformly distributed along the length direction of the operation table 17, the fixed wheels 21 are mounted at the top of the operation table 17 and rotatably connected with the operation table 17, a first chute 23 is disposed on the side surface of the fixed wheels 21, a first air cylinder 24 is disposed on one side of the first chute 23, a plurality of fixed wheels 21 are disposed on the other side corresponding to the first chute 23, a first slide, the output end of the first air cylinder 24 is fixedly connected with a first sliding block 25, the first sliding block 25 is in sliding connection with a first sliding groove 23 along the width direction of the operating platform 17, a plurality of sliding wheels 22 are installed on the first sliding block 25 and are evenly distributed along the length direction of the operating platform 17, and the sliding wheels 22 are rotatably connected with the first sliding block 25.
As shown in fig. 3, a first rectangular hole 26 is formed in the operating platform 17, one side of the first rectangular hole 26 is close to the fixed wheel 21 and the sliding wheel 22, and the other side, corresponding to the first rectangular hole 26, is far from the fixed wheel 21 and the sliding wheel 22, as shown in fig. 4, a first supporting plate 27 is arranged in the first rectangular hole 26, the first supporting plate 27 is installed in the first rectangular hole 26 and close to one side of the fixed wheel 21 and one side of the sliding wheel 22, a first motor 28 is arranged on the first supporting plate 27, a gear 29 is arranged at the output end of the first motor 28, a plurality of racks 30 matched with the gear 29 are arranged on the turnover mechanism 19, and the.
As shown in fig. 4 and 5, the turnover mechanism 19 includes a turning sleeve 31 and a limiting tube 32, the middle part of the limiting tube 32 is located in the turning sleeve 31, both ends of the limiting tube 32 are located outside the turning sleeve 31, the central axis of the limiting tube 32 and the central axis of the turning sleeve 31 are the same axis, two jaw assemblies 33 are arranged on the inner side wall of the turning sleeve 31, the two jaw assemblies 33 are distributed in a mirror image manner by taking the central axis of the turning sleeve 31 as the center, the cross section of the limiting tube 32 is oval, two rectangular holes 34 corresponding to the jaw assemblies 33 are arranged on the limiting tube 32, the length direction of the rectangular holes 34 is the same as the length direction of the limiting tube 32, one long side of the rectangular holes 34 is located on the limiting tube 32 far away from the central axis, the other long side of the rectangular holes 34 is located on the limiting tube 32 near the central axis, the rectangular holes 34 are located in the turning sleeve 31, one end of a jaw assembly 33 is fixedly connected with a steering sleeve 31, the other end of the jaw assembly 33 penetrates through a rectangular hole II 34 and is positioned in a limiting pipe 32, the jaw assembly 33 on the steering sleeve 31 is rotatably connected with the limiting pipe 32 through a rectangular hole II 34, one end of a supporting plate I27 is fixedly connected with one side, close to a fixed wheel 21 and a sliding wheel 22, in a rectangular hole I26, the other end of the supporting plate I27 is far away from the fixed wheel 21 and the sliding wheel 22 and is fixedly connected with a supporting plate II 35, one end of the supporting plate II 35 is fixedly connected with the supporting plate I27, the other end of the supporting plate II 35 is provided with a U-shaped supporting plate I36, the outer side of the bottom of the U-shaped supporting plate I36 is fixedly connected with the supporting plate II 35, a U-shaped supporting plate II 37 is arranged on an operating table 17, the outer side of the bottom of the U-shaped supporting plate II 37 is fixedly connected with the operating table 17, the U-shaped supporting plate II 37, the inner side of the bottom of the U-shaped supporting plate I36 and the inner side of the bottom of the U-shaped supporting plate II 37 are both provided with a supporting plate III 38, one end of one supporting plate III 38 is fixedly connected with the U-shaped supporting plate I36, the other end of the supporting plate III is contacted with one end of the limiting pipe 32, one end of the other supporting plate III 38 is fixedly connected with the U-shaped supporting plate II 37, the other end of the supporting plate III is contacted with the other end of the limiting pipe 32, one end of the supporting plate III 38 is provided with a sliding groove II 39 and two clamping blocks 40, the two clamping blocks 40 are respectively positioned at two sides of the limiting pipe 32, one end of the clamping block 40 is positioned in the sliding groove II 39 and is in sliding connection with the sliding groove II 39, the other end of the clamping block 40 is contacted with the limiting pipe 32, a rubber pad is arranged on the contact surface of the clamping block 40, a tensioning spring is arranged in the sliding groove, the other end of the tension spring is fixedly connected with another clamping block 40, the steering sleeve 31 is located between the two supporting plates III 38, one end of the steering sleeve 31 is arranged on the U-shaped supporting plate I36, the other end of the steering sleeve 31 is arranged on the U-shaped supporting plate II 37, the rack 30 is located on the outer side wall of the steering sleeve 31 and located between the U-shaped supporting plate I36 and the U-shaped supporting plate II 37, and the plurality of racks 30 are evenly distributed along the circumferential direction of the steering sleeve 31.
As shown in fig. 5, the jaw assembly 33 includes a jaw head 41, first telescopic shaft tube 42 and second telescopic shaft tube 43, claw head 41 is located spacing pipe 32, the shape of claw head 41 is rectangular shape, the length of claw head 41 is greater than the length of two 34 of rectangular hole, one side of claw head 41 is equipped with a plurality of rubber bump 44, the opposite side and the first 42 fixed connection of telescopic shaft tube of claw head 41, the one end and the second 43 sliding connection of telescopic shaft tube of first 42 of telescopic shaft tube, the other end of first 42 of telescopic shaft tube runs through two 34 of rectangular hole and the first 41 fixed connection of claw, the one end and the inside wall fixed connection of steering sleeve 31 of two 43 of telescopic shaft tube, the other end and the first 42 sliding connection of telescopic shaft tube of second 43 of telescopic shaft tube, be equipped with first spring 45 in the first 42 of telescopic shaft tube, the one end of first spring 45 is located first 42 of telescopic shaft tube and with claw head 41 fixed connection, the other end of first spring runs through first 42 of telescopic shaft tube and is located telescopic shaft tube two.
As shown in fig. 1, the operation table 17 and the first slider 25 are both provided with a plurality of rotating shafts, the fixed wheel 21 is rotatably connected with the operation table 17 through the rotating shaft corresponding to the fixed wheel 21, the sliding wheel 22 is rotatably connected with the first slider 25 through the rotating shaft corresponding to the sliding wheel 22, as shown in fig. 6, the top end of the rotating shaft is provided with a limit block 46, the limit block 46 is rotatably connected with the rotating shaft, the fixed wheel 21 and the sliding wheel 22 are both positioned at the bottom end of the rotating shaft corresponding to the fixed wheel 21, the rotating shaft is sleeved with a second spring 47, the fixed wheel 21 and the sliding wheel 22 are both connected with the corresponding limit block 46 through the second spring 47, the fixed wheel 21 has the same shape and size as the sliding wheel 22, the fixed wheel 21 comprises an upper wheel 48 and a lower wheel 49, the upper wheel 48 has the same shape and size as the lower wheel 49, the upper wheel 48 and the lower wheel 49 are vertically symmetrically distributed, the upper wheel 48 and the lower, the bottom of the upper wheel 48 is close to the lower wheel 49, the top of the upper wheel 48 is far away from the lower wheel 49, a guide inclined plane 50 is arranged at the edge of the bottom of the upper wheel 48, and the top of the upper wheel 48 is connected with the limiting block 46 through a second spring 47.
As shown in fig. 1, a U-shaped groove 51 is formed at the top of the operation table 17, the length direction of the U-shaped groove 51 is the same as the width direction of the operation table 17, the fixed wheel 21 and the sliding wheel 22 are both positioned between the first rectangular hole 26 and the U-shaped groove 51, both ends of the operation table 17 are provided with mounting grooves 52, the conveying device 18 is positioned in the mounting grooves 52, the conveying device 18 comprises a second slider 53 and a fixed block 54, both the shape of the second slider 53 and the shape of the fixed block 54 are cuboid, the second slider 53 and the fixed block 54 are parallel to each other, both the length direction of the second slider 53 and the length direction of the fixed block 54 are the same as the length direction of the operation table 17, both ends of the fixed block 54 are respectively fixedly connected with the inner side walls at both sides of the mounting grooves 52, both sides of the mounting grooves 52 are provided with rectangular sliding holes 55, the second slider 53 is slidably connected, the length direction of the rectangular sliding hole 55 is the same as the width direction of the operating platform 17, one end of the second sliding block 53 on one conveying device 18 penetrates through the corresponding rectangular sliding hole 55 and is positioned in the first rectangular hole 26, the other end of the second sliding block 53 on the other conveying device 18 penetrates through the corresponding rectangular sliding hole 55 and is positioned outside one end of the operating platform 17, one end of the second sliding block 53 on the other conveying device 18 penetrates through the corresponding rectangular sliding hole 55 and is positioned in the U-shaped groove 51, the other end of the second sliding block penetrates through the corresponding rectangular sliding hole 55 and is positioned outside the other end of the operating platform 17, two air cylinders 56 are arranged in the U-shaped groove 51, in the first rectangular hole 26 and at two ends of the operating platform 17, the two air cylinders 56 are installed on the side surfaces of the rectangular sliding hole 55, the output ends of the two air cylinders 56 are fixedly connected with the end portions of the corresponding second sliding blocks 53, the two air cylinders 56 in the first rectangular hole 26 are positioned on the side, the transmission components 57 comprise driven rollers 58, driving rollers 59, conveying belts 60 and second motors 61, wherein the second motor 61 on one transmission component 57 is mounted at one end of the fixed block 54, the driven rollers 58 on the transmission component 57 are rotatably connected with the fixed block 54 and positioned at the other end of the fixed block 54, the second motor 61 on the other transmission component 57 is mounted at one end of the second slider 53, the driven rollers 58 on the transmission component 57 are rotatably connected with the second slider 53 and positioned at the other end of the second slider 53, the output end of the second motor 61 is fixedly connected with the driving rollers 59, the driving rollers 59 are connected with the driven rollers 58 through the conveying belts 60, one end of the conveying belts 60 is sleeved with the driving rollers 59, the other end of the conveying belts 60 is sleeved with the driven rollers 58, a plurality of uniformly distributed convex ribs 62 are arranged on the conveying belts 60, and the convex ribs 62 are in a long strip shape, the material used for the ribs 62 is rubber.
The working principle is as follows: in an initial state, the claw heads 41 on the two claw assemblies 33 are both positioned at a position far away from the central axis of the limiting pipe 46, and the clamping block 40 always clamps the limiting pipe 46; an operator places the head end of the seamless steel pipe on the conveying device 18 far away from the turnover mechanism 19, the second air cylinder 56 drives the second sliding block 53 to approach the fixed block 54 through the output end to clamp the seamless steel pipe, the second motor 61 on the fixed block 54 and the second motor 61 on the second sliding block 53 drive the conveying belt 60 to rotate oppositely for forward conveying, then the first air cylinder 24 is started to push the sliding wheel 22 to move to one side of the fixed wheel 21 so as to move to a proper position, and after the two sides of the seamless steel pipe are straightened, the seamless steel pipe sequentially passes through the limiting pipe 46 and the conveying device 18 close to the turnover mechanism 19; when the tail end of the seamless steel tube is about to be separated from the conveying device 18 far away from the turnover mechanism 19, starting the conveying device 18 close to the turnover mechanism 19, and clamping the seamless steel tube to continue to convey forwards; after the tail end of the seamless steel tube is straightened through the straightening area 20, the first motor 28 is started, the steering sleeve 31 is controlled to rotate by a certain angle through the meshing of the gear 29 and the rack 30, so that the claw heads 41 on the two claw assemblies 33 are positioned at the position close to the central axis of the limiting tube 46 and clamp the seamless steel tube after being mutually closed, at the moment, the first telescopic shaft tube 42 is contacted with the long edge of the second rectangular hole 34, the conveying device 18 close to the turnover mechanism 19 loosens the seamless steel tube, the first motor 28 drives the steering sleeve 31 and the limiting tube 46 to continuously rotate by 90 degrees so as to drive the seamless steel tube to rotate by 90 degrees, the conveying device 18 close to the turnover mechanism 19 clamps the seamless steel tube again, the first motor 28 controls the steering sleeve 31 to reversely rotate by a certain angle, so that the claw heads 41 on the two claw assemblies 33 are mutually far away from each other and then return, the conveying device 18 close to the turnover mechanism 19 reversely conveys the seamless steel tube and straightens the other two sides of the seamless steel tube; during reverse conveying, when the head end of the seamless steel pipe is about to break away from the conveying device 18 close to the turnover mechanism 19, the conveying device 18 far away from the turnover mechanism 19 is started, the seamless steel pipe is clamped, and the seamless steel pipe is continuously conveyed in the reverse direction until straightening is finished.

Claims (10)

1. A cold-rolled seamless steel tube for an automobile transmission shaft is characterized by comprising a first seamless steel tube body (1), a second seamless steel tube body (2), a telescopic sleeve (3) and a first flange (4), wherein the second seamless steel tube body (2) is positioned in the first seamless steel tube body (1), one end of the first seamless steel tube body (1) is provided with a connecting shaft (5), one end of the connecting shaft (5) is connected with the telescopic sleeve (3), the other end of the connecting shaft (5) is fixedly connected with the first seamless steel tube body (1) and the second seamless steel tube body (2) respectively, the other end of the first seamless steel tube body (1) is provided with a forked frame (6), the forked frame (6) is U-shaped and forked, one end of the first seamless steel tube body (1) and one end of the second seamless steel tube body (2) are fixedly connected with the connecting shaft (5), and the other end of the first seamless steel tube body (1) is fixedly connected with the forked frame (6), the other end of the seamless steel pipe body II (2) is detachably connected with the forked frame (6), a cross shaft (7) is arranged in the forked frame (6), the cross shaft (7) is in threaded connection with the upper end and the lower end of the forked frame (6), the forked frame (6) is connected with a flange II (8) matched with the flange I (4) through the cross shaft (7), and the flange I (4) is in threaded connection with the flange II (8).
2. The cold-rolled seamless steel tube for the automobile transmission shaft according to claim 1, wherein an external spline is arranged on the connecting shaft (5), an internal spline matched with the external spline is arranged in the telescopic sleeve (3), one end of the connecting shaft (5) is arranged in the telescopic sleeve (3) through the matching of the external spline and the internal spline, the other end of the connecting shaft (5) is fixedly connected with the first seamless steel tube body (1) and is provided with a first connecting block (9), the first connecting block (9) is positioned in the first seamless steel tube body (1), the connecting shaft (5) is fixedly connected with a second seamless steel tube body (2) through the first connecting block (9), the open end of the fork-shaped frame (6) is connected with a second flange (8) through a cross shaft (7), the bottom end of the fork-shaped frame (6) is fixedly connected with the first seamless steel tube body (1) and is provided with a second connecting block (10), the connecting block II (10) is located in the seamless steel pipe body I (1), a mounting groove matched with the seamless steel pipe body II (2) is formed in the connecting block II (10), the seamless steel pipe body II (2) is sleeved in the connecting block II (10) on the forked frame (6) in a matched mode with the mounting groove, and a plurality of uniformly distributed through holes (11) are formed in the seamless steel pipe body II (2).
3. The cold-rolled seamless steel tube for the automobile transmission shaft is characterized in that the cross shaft (7) comprises a first shaft (12) and a second shaft (13), the first shaft (12) and the second shaft (13) are fixedly connected, the first shaft (12) and the second shaft (13) are perpendicular to each other and are cross-shaped, two ends of the first shaft (12) are respectively in threaded connection with the upper end and the lower end of the fork-shaped frame (6), two rotating rods (14) are arranged on one side of the second flange (8), the second flange (8) is respectively in rotational connection with two ends of the second shaft (13) through the two rotating rods (14), a plurality of convex strips (15) are arranged on the other side of the second flange (8), and a plurality of grooves (16) matched with the convex strips (15) are formed in the first flange (4).
4. A preparation process of a cold-rolled seamless steel tube for an automobile transmission shaft is characterized by comprising the following steps:
step one, carrying out three-roller continuous rolling on a steel billet, and carrying out sizing test after extrusion;
secondly, detecting whether the outer surface has cracks, cutting off the steel billet after the outer surface is qualified and has no cracks, and performing centering treatment through a punching machine;
step three, heating the steel billet to carry out hot rolling and punching, and producing the steel billet into a hollow billet;
step four, pickling the steel billet by using liquid, observing whether a large number of bubbles are generated on the surface of the steel billet, and if no large number of bubbles are generated, judging that the quality of the steel billet reaches the standard;
step five, carrying out primary cold rolling treatment on the steel billet, carrying out heat treatment after cold rolling, reducing the hardness of the processed pipe, and reducing the structure of the steel pipe;
sixthly, straightening the steel billet after the heat treatment;
cutting off the head and the tail of the billet, and chamfering the two ends of the billet;
eighthly, carrying out acid-phosphate soap lubrication treatment on the steel billet, and producing a finished product by using a two-roll cold rolling mill;
step nine, straightening the steel pipe by using a straightening machine;
step ten, the steel pipe is subjected to oil removal treatment in an oil removal cylinder to remove oil stains;
step eleven, soaking the steel pipe in anti-rust oil for rust prevention;
Step twelve, carrying out eddy current and ultrasonic flaw detection treatment, detecting defects on the inner surface and the outer surface of the steel pipe, detecting tolerance sizes by using a micrometer and an inside diameter gauge, and respectively forming a first qualified seamless steel pipe body (1) and a second qualified seamless steel pipe body (2), wherein the diameter of the second qualified seamless steel pipe body (2) is smaller than that of the first qualified seamless steel pipe body (1);
step thirteen, drilling a plurality of uniformly distributed through holes (11) in the seamless steel pipe body II (2) through a drilling machine, and chamfering the edges of the through holes (11);
fourteen steps, one end of the second seamless steel tube body (2) is fixedly connected with the first connecting block (9) on the connecting shaft (5) through welding, one end of the second seamless steel tube body (1) is fixedly connected with the connecting shaft (5) through welding, then the forked frame (6) is sleeved at the other end of the second seamless steel tube body (2) through the first connecting block (10), and finally the forked frame (6) is fixedly connected with the other end of the second seamless steel tube body (1) through welding.
5. The preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft according to the claim 4, characterized in that the straightening machine comprises an operation table (17), the operation table (17) is shaped like a cuboid, the bottom of the operation table (17) is provided with a plurality of uniformly distributed support columns, both ends of the operation table (17) are provided with conveying devices (18), the middle of the operation table (17) is provided with a turnover mechanism (19) and a straightening area (20), the turnover mechanism (19) is positioned between one conveying device (18) and the straightening area (20), the straightening area (20) is provided with a plurality of fixed wheels (21) corresponding to the conveying devices (18) and a plurality of sliding wheels (22) corresponding to the conveying devices (18), the plurality of fixed wheels (21) are uniformly distributed along the length direction of the operation table (17), the fixed wheels (21) are arranged on the top of the operation table (17) and are rotatably connected with the operation table (17), the side of tight pulley (21) is equipped with spout (23), one side of spout (23) is equipped with cylinder (24), and a plurality of tight pulley (21) are located the corresponding opposite side of spout (23), be equipped with slider (25) in spout (23), the output and the slider (25) fixed connection of cylinder (24), slider (25) are along the width direction and the spout (23) sliding connection of operation panel (17), and a plurality of movable pulley (22) are installed on slider (25) and are followed the length direction evenly distributed of operation panel (17), movable pulley (22) rotate with slider (25) and are connected.
6. The process for producing a cold-rolled seamless steel tube for an automobile transmission shaft according to claim 5, is characterized in that the operating platform (17) is provided with a first rectangular hole (26), one side of the first rectangular hole (26) is close to the fixed wheel (21) and the sliding wheel (22), the other side corresponding to the first rectangular hole (26) is far away from the fixed wheel (21) and the sliding wheel (22), a first supporting plate (27) is arranged in the first rectangular hole (26), the first supporting plate (27) is arranged on one side, close to the fixed wheel (21) and the sliding wheel (22), in the first rectangular hole (26), a first motor (28) is arranged on the first support plate (27), a gear (29) is arranged on the output end of the first motor (28), the turnover mechanism (19) is provided with a plurality of racks (30) matched with the gear (29), and the gear (29) is meshed with the racks (30).
7. The preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft according to claim 6, wherein the turnover mechanism (19) comprises a steering sleeve (31) and a limiting tube (32), the middle part of the limiting tube (32) is positioned in the steering sleeve (31), two ends of the limiting tube (32) are positioned outside the steering sleeve (31), the central axis of the limiting tube (32) and the central axis of the steering sleeve (31) are coaxial, two jaw assemblies (33) are arranged on the inner side wall of the steering sleeve (31), the two jaw assemblies (33) are distributed in a mirror image manner by taking the central axis of the steering sleeve (31) as the center, the cross section of the limiting tube (32) is oval, two rectangular holes (34) corresponding to the jaw assemblies (33) are arranged on the limiting tube (32), and the length direction of the rectangular holes (34) is the same as the length direction of the limiting tube (32), one long edge of the second rectangular hole (34) is located at a position, far away from the central axis, of the limiting pipe (32), the other long edge of the second rectangular hole (34) is located at a position, near the central axis, of the limiting pipe (32), the second rectangular hole (34) is located in the steering sleeve (31), one end of the jaw assembly (33) is fixedly connected with the steering sleeve (31), the other end of the jaw assembly (33) penetrates through the second rectangular hole (34) and is located in the limiting pipe (32), the jaw assembly (33) on the steering sleeve (31) is rotatably connected with the limiting pipe (32) through the second rectangular hole (34), one end of the first support plate (27) is fixedly connected with one side, close to the fixed wheel (21) and the sliding wheel (22), of the first support plate (27), the other end of the first support plate is far away from the fixed wheel (21) and the sliding wheel (22) and is fixedly connected with the second support plate (35), one end of the second supporting plate (35) is fixedly connected with the first supporting plate (27), the other end of the second supporting plate (35) is provided with a first U-shaped supporting plate (36), the outer side of the bottom of the first U-shaped supporting plate (36) is fixedly connected with the second supporting plate (35), a second U-shaped supporting plate (37) is arranged on the operating platform (17), the outer side of the bottom of the second U-shaped supporting plate (37) is fixedly connected with the operating platform (17), the second U-shaped supporting plate (37) is positioned at one side close to the fixed wheel (21) and the sliding wheel (22), the first U-shaped supporting plate (36) and the second U-shaped supporting plate (37) are identical in shape and size, the inner side of the bottom of the first U-shaped supporting plate (36) and the inner side of the bottom of the second U-shaped supporting plate (37) are both provided with third supporting plates (38), one end of one supporting plate (38) is fixedly connected with the first U-shaped supporting plate (36), and the other end of the, one end of the other support plate III (38) is fixedly connected with the U-shaped support plate II (37), the other end of the other support plate III is contacted with the other end of the limiting pipe (32), one end of the support plate III (38), which is contacted with the limiting pipe (32), is provided with a sliding groove II (39) and two clamping blocks (40), the two clamping blocks (40) are respectively positioned at two sides of the limiting pipe (32), one end of each clamping block (40) is positioned in the sliding groove II (39) and is in sliding connection with the sliding groove II (39), the other end of each clamping block (40) is contacted with the limiting pipe (32), a rubber pad is arranged on the contact surface of each clamping block (40), which is contacted with the limiting pipe (32), a tensioning spring is arranged in the sliding groove II (39), one end of the tensioning spring is fixedly connected with one clamping block (40), and the other end of the tensioning spring is fixedly connected with the other clamping block (40), the steering sleeve (31) is located between the two supporting plates III (38), one end of the steering sleeve (31) is arranged on the U-shaped supporting plate I (36), the other end of the steering sleeve (31) is arranged on the U-shaped supporting plate II (37), the rack (30) is located on the outer side wall of the steering sleeve (31) and located between the U-shaped supporting plate I (36) and the U-shaped supporting plate II (37), and the plurality of racks (30) are evenly distributed along the circumferential direction of the steering sleeve (31).
8. The preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft according to claim 7, wherein the jaw assembly (33) comprises a jaw head (41), a first telescopic shaft tube (42) and a second telescopic shaft tube (43), the jaw head (41) is positioned in the limiting tube (32), the jaw head (41) is in a strip shape, the length of the jaw head (41) is greater than that of the second rectangular hole (34), a plurality of rubber bumps (44) are arranged on one side of the jaw head (41), the other side of the jaw head (41) is fixedly connected with the first telescopic shaft tube (42), one end of the first telescopic shaft tube (42) is slidably connected with the second telescopic shaft tube (43), the other end of the first telescopic shaft tube (42) penetrates through the second rectangular hole (34) to be fixedly connected with the jaw head (41), one end of the second telescopic shaft tube (43) is fixedly connected with the inner side wall of the steering sleeve (31), the other end and the flexible central siphon (42) sliding connection of flexible central siphon two (43), be equipped with spring (45) in flexible central siphon (42), the one end of spring (45) is located flexible central siphon one (42) and with claw head (41) fixed connection, the other end of spring (45) runs through flexible central siphon one (42) and is located flexible central siphon two (43) and with the inside wall fixed connection that turns to sleeve (31).
9. The preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft according to the claim 5, the claim 6, the claim 7 or the claim 8, wherein a plurality of rotating shafts are respectively arranged on the operating platform (17) and the first sliding block (25), the fixed wheel (21) is rotatably connected with the operating platform (17) through the rotating shaft corresponding to the fixed wheel, the sliding wheel (22) is rotatably connected with the first sliding block (25) through the rotating shaft corresponding to the sliding wheel, the top end of the rotating shaft is provided with a limit block (46), the limit block (46) is rotatably connected with the rotating shaft, the fixed wheel (21) and the sliding wheel (22) are both arranged at the bottom end of the rotating shaft corresponding to the fixed wheel, the rotating shaft is sleeved with a second spring (47), the fixed wheel (21) and the sliding wheel (22) are both connected with the corresponding limit block (46) through the second spring (47), the shape and the size of the fixed wheel (21) are both the same as the shape and the size, the fixed wheel (21) comprises an upper wheel (48) and a lower wheel (49), the shape and the size of the upper wheel (48) are the same as those of the lower wheel (49), the upper wheel (48) and the lower wheel (49) are symmetrically distributed up and down, the upper wheel (48) and the lower wheel (49) are rotatably connected with the operating platform (17) through a rotating shaft, the bottom of the upper wheel (48) is close to the lower wheel (49), the top of the upper wheel (48) is far away from the lower wheel (49), a guide inclined plane (50) is arranged at the edge of the bottom of the upper wheel (48), and the top of the upper wheel (48) is connected with a limiting block (46) through a second spring (47).
10. The preparation process of the cold-rolled seamless steel tube for the automobile transmission shaft according to claim 5, characterized in that a U-shaped groove (51) is formed in the top of the operating platform (17), the length direction of the U-shaped groove (51) is the same as the width direction of the operating platform (17), the fixed wheel (21) and the sliding wheel (22) are both positioned between the rectangular hole I (26) and the U-shaped groove (51), mounting grooves (52) are formed in both ends of the operating platform (17), the conveying device (18) is positioned in the mounting grooves (52), the conveying device (18) comprises a sliding block II (53) and a fixed block (54), the sliding block II (53) and the fixed block (54) are both cuboid in shape, the sliding block II (53) and the fixed block (54) are parallel to each other, the length direction of the sliding block II (53) and the length direction of the fixed block (54) are both the same as the length direction of the operating platform (17), the two ends of the fixed block (54) are fixedly connected with the inner side walls of the two sides of the mounting groove (52) respectively, rectangular sliding holes (55) are arranged on the two sides of the mounting groove (52), the second sliding block (53) is connected with the mounting groove (52) in a sliding mode through the rectangular sliding holes (55), the rectangular sliding holes (55) are located on the side faces of the fixed block (54), the length direction of each rectangular sliding hole (55) is the same as the width direction of the operating platform (17), one end of the second sliding block (53) on one conveying device (18) penetrates through the corresponding rectangular sliding hole (55) and is located in the first rectangular hole (26), the other end of each conveying device penetrates through the corresponding rectangular sliding hole (55) and is located outside one end of the operating platform (17), one end of the second sliding block (53) on the other conveying device (18) penetrates through the corresponding rectangular sliding hole (55) and is located in the U-shaped groove (51), and the other end of each conveying device penetrates through the corresponding rectangular sliding hole (55) and, the device is characterized in that a second cylinder (56) is arranged in the U-shaped groove (51), the first rectangular hole (26) and two ends of the operating platform (17), the second cylinder (56) is arranged on the side surface of the rectangular sliding hole (55), the output end of the second cylinder (56) is fixedly connected with the end part of the corresponding second slider (53), the second cylinder (56) in the first rectangular hole (26) is positioned on one side, away from the fixed wheel (21) and the sliding wheel (22), of the rectangular hole (26), the second slider (53) and the fixed block (54) are respectively provided with a transmission assembly (57), each transmission assembly (57) comprises a driven roller (58), a driving roller (59), a conveying belt (60) and a second motor (61), the second motor (61) on one transmission assembly (57) is arranged at one end of the fixed block (54), and the driven roller (58) on the transmission assembly (57) is rotatably connected with the fixed block (54) and positioned at the other end of the fixed block (54), two (61) of motors on another transmission assembly (57) are installed in the one end of two (53) of slider, and driven roller (58) on this transmission assembly (57) rotate with two (53) of slider and be connected and lie in the other end of two (53) of slider, the output and the drive roller (59) fixed connection of two (61) of motors, drive roller (59) are connected with driven roller (58) through conveyor belt (60), the one end and the drive roller (59) of conveyor belt (60) cup joint, the other end and the driven roller (58) of conveyor belt (60) cup joint, be equipped with a plurality of evenly distributed's protruding muscle (62) on conveyor belt (60), the shape of protruding muscle (62) is rectangular shape, the material that protruding muscle (62) adopted is rubber.
CN202010560212.0A 2020-06-18 2020-06-18 Cold-rolled seamless steel tube for automobile transmission shaft and preparation process thereof Active CN111853043B (en)

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CN1744955A (en) * 2003-01-31 2006-03-08 住友金属工业株式会社 Seamless steel pipe for drive shaft and manufacturing method thereof
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CN103921065A (en) * 2014-03-18 2014-07-16 泰州双羊精密无缝钢管有限公司 Manufacturing method of vehicle seamless steel tubes
CN104196903A (en) * 2014-09-22 2014-12-10 江苏荣基重工科技有限公司 Cross-shaft type universal coupling with spline pair
CN104533972A (en) * 2014-12-10 2015-04-22 镇江市远程传动机械有限责任公司 Coupler with spline pair
CN107088593A (en) * 2017-04-06 2017-08-25 张家港市宏大钢管有限公司 A kind of pipe straightener
CN108405662A (en) * 2018-05-25 2018-08-17 东莞理工学院 A pipe straightening machine
CN111112373A (en) * 2020-02-26 2020-05-08 巨特钢业有限公司 Production process and processing equipment of high-strength corrosion-resistant stainless steel seamless steel pipe

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1744955A (en) * 2003-01-31 2006-03-08 住友金属工业株式会社 Seamless steel pipe for drive shaft and manufacturing method thereof
RU2234428C1 (en) * 2003-04-24 2004-08-20 Закрытое Акционерное Общество "Техмаш" Ground vehicle propeller shaft
CN202073945U (en) * 2010-12-30 2011-12-14 河南汇丰管业有限公司 Device for connecting speed reducer with elongator or perforator in seamless steel pipe production
CN103921065A (en) * 2014-03-18 2014-07-16 泰州双羊精密无缝钢管有限公司 Manufacturing method of vehicle seamless steel tubes
CN104196903A (en) * 2014-09-22 2014-12-10 江苏荣基重工科技有限公司 Cross-shaft type universal coupling with spline pair
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Denomination of invention: Cold rolled seamless steel pipe for automotive transmission shaft and its preparation process

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