CN109281924B - Steel structure joint with self-closing outer coating and manufacturing method thereof - Google Patents
Steel structure joint with self-closing outer coating and manufacturing method thereof Download PDFInfo
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- CN109281924B CN109281924B CN201811378421.2A CN201811378421A CN109281924B CN 109281924 B CN109281924 B CN 109281924B CN 201811378421 A CN201811378421 A CN 201811378421A CN 109281924 B CN109281924 B CN 109281924B
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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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0614—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part of the joint being open on two sides
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- 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
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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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
- F16C11/0623—Construction or details of the socket member
- F16C11/0628—Construction or details of the socket member with linings
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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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/068—Special features relating to lubrication
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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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
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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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/10—Arrangements for locking
- F16C11/103—Arrangements for locking frictionally clamped
- F16C11/106—Arrangements for locking frictionally clamped for ball joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a steel structure joint wrapped by self-closing and a manufacturing method thereof, wherein the steel structure joint comprises a cylindrical substrate, a ball head rod which is sheathed by the closing sleeve and is provided with a ball head, and a solidified slide film layer which is solidified on the inner surface of the cylindrical substrate and is matched with the ball head rod; the invention adopts a cylindrical closing tool which is adaptive to the shape of the cylindrical substrate, the upper end of the cylindrical substrate is opened, the opening is provided with slopes of 30 degrees, 20 degrees and 10 degrees from the outside to the inside, three-section type buffering closing is carried out, and a tool withdrawal groove which meets the deformation requirement is processed at the bottom of the inner surface of the cylindrical substrate in advance before closing. The steel structure of the invention allows in-situ rotation, prevents axial pull-off, self-closes, and has simple installation and stable structure.
Description
Technical Field
The invention relates to the field of steel structures, in particular to an outsourcing self-closing steel structure joint and a manufacturing method thereof.
Background
The steel structure is generally connected in three ways, namely welding connection, bolt connection and rivet connection. The welding connection has the advantages of direct connection to any direction, angle and shape of steel, no weakening of the section of a member, steel saving, simple structure, convenient manufacture, high connection rigidity, good sealing performance, suitability for automatic operation, high production efficiency and the like, and is widely applied. The welding connection is that the welding rod and the weldment are locally melted by the heat generated by the electric arc and are condensed into a welding seam through cooling, so that the weldments are connected into a whole. In the high-temperature welding and cooling process, a heat influence area is formed by steel near a welding line due to the high-temperature action, the structure is embrittled due to residual stress and residual deformation generated by uneven high temperature and cooling, and the bearing capacity, the rigidity and the service performance of the steel structure are influenced to a certain extent.
For steel structures requiring special performance (such as multi-segment connecting rods, safety frames with heads rotating for convenient assembly), special joint structures which are capable of preventing axial pull-off and are capable of rotating in radial direction are required.
However, in the related patents applied in China, the prior art which is specially used for preventing the axial pull-off but has a radial rotatable joint structure does not exist, so that a steel structure joint which allows in-situ rotation, prevents the axial pull-off, is self-closing, is simple to mount and has a stable structure is required in the market.
Disclosure of Invention
The invention aims to provide a steel structure joint which allows in-situ rotation, prevents axial pull-off, is self-closing, is simple to mount and has a stable structure and a manufacturing method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: 1. a manufacturing method of a steel structure joint wrapped with a self-closing-up layer comprises the following steps:
1) preparation before manufacture
Preparing raw materials: preparing a steel billet with carbon content not higher than 0.3%, a ball head rod with spherical hardness not lower than 50HRC and sufficient solid synovial membrane coating material;
preparing a tool: preparing a cylindrical closing-in tool with an upper end opening corresponding to the shape of the finally designed steel matrix and conical surfaces of 30 degrees, 20 degrees and 10 degrees arranged outside and inside the opening, preparing a high-frequency induction tool corresponding to the outer circle of the finally designed steel matrix, and preparing a film coating tool corresponding to the inner arc of the finally designed steel matrix;
preparing equipment: preparing laser cladding equipment, a hydraulic device, an oven and a high-frequency induction device;
2) processing of steel substrates
Firstly, processing the steel billet prepared in the step 1) into a two-section structure with a cylindrical lower end and an inverted cone upper end, wherein the inclination of a conical surface relative to an axis is 30 degrees, and the two-section structure is an initial steel structure;
vertically and downwards drilling a taper hole by taking the center of the upper end face of the initial steel structure obtained in the step I as a base point, wherein the angle of the top end of the taper hole is 60 degrees, and stopping drilling when a hole tip reaches the horizontal plane where the top end of the cylindrical surface at the lower end is positioned to obtain an open hole steel structure;
thirdly, on the middle taper hole surface of the middle open hole steel structure obtained in the second step, a circle of arc ring surface is processed by taking the ball head radius of the ball head rod prepared in the first step of the step 1) as a processing radius and taking a ring at the joint of the taper hole surface and the end surface as the center of a vertical section at the position close to the lower end of the taper hole surface and located at a distance of 2/3-3/4 from the end surface, so as to obtain a prefabricated base body structure;
fourthly, the tool withdrawal groove with the depth equal to the length of the residual conical surface is processed by a process method for processing the tool withdrawal groove by taking the plane of the tip of the conical hole as a reference to obtain a required steel substrate;
3) pretreatment of
Firstly, protecting and fixing a steel substrate obtained in the stage 2) by adopting a film coating tool prepared in the step two in the stage 1), taking a solid slip film coating material prepared in the step two in the stage 1) as a raw material, performing laser coating solid slip film treatment on the arc ring surface obtained in the step 2) by adopting laser cladding equipment, and solidifying a layer of solid slip film layer with the thickness of 0.08-0.2 mm on the arc ring surface to obtain a pretreated steel substrate;
4) closing-up sheath
Coaxially fixing the ball head rod prepared in the step 1), the pretreated steel substrate obtained in the step 3) in the step 1) and the cylindrical necking tool prepared in the step two from top to bottom, and continuously applying vertical pressing force by adopting the hydraulic device prepared in the step 1) and the step three until the ball head rod and the pretreated steel substrate move to be completely necked and fixed to obtain a necking and sheathing steel structure joint;
secondly, placing the outer circle of the necking and sheathing steel structure obtained in the step 1) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the deformation area of the original steel substrate is heated to the AC of the steel material3Stopping heating and standing until the deformation is finished to obtain a stabilized steel structure joint, wherein the temperature is 30-50 ℃ above;
thirdly, repeating the steps of the first step and the second step for 2 to 3 times to obtain a solidified steel structure joint;
5) post-treatment
Putting the outer circle of the solidified steel structure joint obtained in the step 4) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the whole steel matrix is heated to the AC of the steel material3And (3) quenching water to a stable temperature which is 30-50 ℃ above the temperature, and tempering the quenched solidified steel structure joint by adopting the oven prepared in the step 1) and the temperature of 200-240 ℃ for 2-3 h to obtain a reinforced steel structure, wherein the reinforced steel structure is the steel structure joint which needs to be wrapped by the self-closing.
In the manufacturing method of the steel structure joint coated with the self-closing in the outside, the steel substrate adopts 10#The steel is manufactured, and the ball head rod is obtained by adopting GCr6 to quench and temper at low temperature.
In the manufacturing method of the steel structure joint wrapped by the self-closing-up layer, the steel substrate is made of 20Cr, and the ball head rod is obtained by nitriding the surface of 32Cr3 MoV.
In the manufacturing method of the steel structure joint wrapped with the self-closing-up outer layer, the steel matrix is made of 30CrMnSi, and the ball head rod is obtained by performing surface carburization, quenching and low-temperature tempering on 12CrNi 3.
In the manufacturing method of the steel structure joint wrapped with the self-closing up, the solid slip film coating material is any one of silver, iron sulfide and molybdenum disulfide.
Compared with the prior art, the invention has the following advantages: (1) according to the invention, through closing and sheathing, a functional structure which allows in-situ rotation and prevents axial pull-off is realized, the applicability and the practicability of the structure are enhanced through the arrangement of the solidified sliding film layer and the processing of the arc ring surface, the service life is prolonged, the sliding resistance is reduced, and the tightness of the joint is improved. (2) The structure design of the invention is very excellent and reasonable, the conventional physical closing-in technology has no way to integrate a complete and continuous solid sliding film on the inner spherical surface, because the closing-in the conventional technology (actually applied is very little) only deforms the edge wing area outside the upper end surface, so that the closing-in technology is sheathed inwards, the gripping force is only supported by the steel structure of the small edge wing area, more importantly, the structure has a very large inner arc spherical surface which is close to and parallel to the axis (vertical to the horizontal plane) and even can be blocked by the edge wing, and the supersonic speed can not be realized for the linear deposition mode (such as laser cladding, flame spraying and the like). Meanwhile, the inclination angle of the inner arc spherical surface which is not closed up is increased, and no physical barrier exists, so that the cladding of the functional layer can be simply realized, the performance of the joint is greatly enhanced, and the service life of the joint is greatly prolonged. (3) The three matching materials which are optimized in the invention are reasonably matched in the research of the existing friction pair, are low-cost materials, are easy to process and realize, and can ensure the normal operation of the invention within a certain period of time even if the solid sliding film falls off or fails. (4) The subsequent heat treatment of the invention also further promotes the metallographic structure of the deformation area to be stable and completely transformed, and the final low-temperature heat treatment has the function of removing stress on one hand and can also stabilize the metallographic structure (the quenched martensite is transformed into the tempered martensite) on the other hand, thereby greatly improving the strength of the steel matrix at the joint. Therefore, the steel structure joint has the characteristics of allowing in-situ rotation, preventing axial pull-off, self-closing, simple installation and stable structure.
Drawings
FIG. 1 is a schematic view of the present invention after installation;
fig. 2 is a schematic view of the present invention before installation.
In the figure: the steel matrix 1, the tool withdrawal groove 2, the bulb rod 3, the solid slide film layer 4 and the cylindrical closing tool 5.
Detailed Description
Example 1:
the manufacturing method of the steel structure joint coated with the self-closing-up layer as shown in fig. 1 and fig. 2 comprises the following stages:
1) preparation before manufacture
Preparing raw materials: preparation 10#Quenching steel billet, GCr6 and tempering at low temperature to obtain a bulb rod 3 and sufficient silver powder;
preparing a tool: preparing a cylindrical closing-in tool 5 with an upper end opening corresponding to the shape of the finally designed steel matrix and conical surfaces of 30 degrees, 20 degrees and 10 degrees arranged outside and inside the opening, preparing a high-frequency induction tool corresponding to the outer circle of the finally designed steel matrix, and preparing a film coating tool corresponding to the inner arc of the finally designed steel matrix;
preparing equipment: preparing laser cladding equipment, a hydraulic device, an oven and a high-frequency induction device;
2) working of the Steel substrate 1
Firstly, processing the steel billet prepared in the step 1) into a two-section structure with a cylindrical lower end and an inverted cone upper end, wherein the inclination of a conical surface relative to an axis is 30 degrees, and the two-section structure is an initial steel structure;
vertically and downwards drilling a taper hole by taking the center of the upper end face of the initial steel structure obtained in the step I as a base point, wherein the angle of the top end of the taper hole is 60 degrees, and stopping drilling when a hole tip reaches the horizontal plane where the top end of the cylindrical surface at the lower end is positioned to obtain an open hole steel structure;
processing a circle of arc-shaped ring surface on the middle taper hole surface of the obtained middle open hole steel structure in the step (1) at a position close to the lower end of the taper hole surface and apart from the end surface by the length of 3/4, wherein the radius of the ball head rod 3 prepared in the step (1) is a processing radius, and the circle center of the vertical section is a circle center of the circular ring at the joint of the taper hole surface and the end surface, so as to obtain a prefabricated base body structure;
fourthly, the tool withdrawal groove 2 with the depth equal to the length of the residual conical surface is processed by a process method for processing the tool withdrawal groove by taking the plane of the tip of the conical hole as a reference to obtain the required steel substrate 1;
3) pretreatment of
Firstly, protecting and fixing a steel substrate 1 obtained in the stage 2) by adopting a film coating tool prepared in the step two in the stage 1), taking a solid slip film coating material prepared in the step two in the stage 1) as a raw material, performing laser coating solid slip film treatment on an arc ring surface obtained in the step 2) by adopting laser cladding equipment, and solidifying a layer of solid slip film layer 4 with the thickness of 0.2mm on the arc ring surface to obtain a pretreated steel substrate 1;
4) closing-up sheath
Coaxially fixing a ball head rod 3 prepared in the step 1) and a pretreated steel substrate 1 obtained in the step 3) in the step 1) and a cylindrical closing tool 5 prepared in the step 1) from top to bottom, and continuously applying vertical pressing force by adopting a hydraulic device prepared in the step 1) and the step three until the ball head rod 3 and the pretreated steel substrate 1 move to be completely closed and fixed to obtain a closing and sheathing steel structure joint;
secondly, placing the outer circle of the necking and sheathing steel structure obtained in the step 1) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the deformation area of the original steel substrate 1 is heated to the AC of the steel material3Above temperatureStopping heating at 50 ℃, standing until the deformation is finished, and obtaining a stabilized steel structure joint;
thirdly, repeating the steps for 3 times to obtain a solidified steel structure joint;
5) post-treatment
Putting the outer circle of the solidified steel structure joint obtained in the step 4) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the whole steel matrix 1 is heated to the AC of the steel material3And (3) quenching water to a stable temperature, and tempering the quenched solidified steel structure joint at the temperature of 240 ℃ for 3h by adopting the oven prepared in the step 1) to obtain a reinforced steel structure, wherein the reinforced steel structure is the steel structure joint which needs to be wrapped by the self-closing sleeve.
Example 2:
the whole is in accordance with example 1, with the difference that:
1) preparation before manufacture
Preparing raw materials: preparing 20Cr steel billets, a bulb rod 3 obtained after nitriding the surface of 32Cr3MoV and sufficient iron sulfide powder;
2) working of the Steel substrate 1
Processing a circle of arc-shaped ring surface on the middle taper hole surface of the obtained middle open hole steel structure in the step (1) at a position close to the lower end of the taper hole surface and apart from the end surface by the length of 2/3, wherein the radius of the ball head rod 3 prepared in the step (1) is a processing radius, and the circle center of the vertical section is a circle center of the circular ring at the joint of the taper hole surface and the end surface, so as to obtain a prefabricated base body structure;
3) pretreatment of
Firstly, protecting and fixing a steel substrate 1 obtained in the stage 2) by adopting a film coating tool prepared in the step two in the stage 1), taking a solid slip film coating material prepared in the step two in the stage 1) as a raw material, performing laser coating solid slip film treatment on an arc ring surface obtained in the step three in the stage 2) by adopting laser cladding equipment, and solidifying a layer of solid slip film layer 4 with the thickness of 0.08mm on the arc ring surface to obtain a pretreated steel substrate 1;
4) closing-up sheath
Secondly, the closing-in obtained in the step I is sheathedArranging the excircle of the steel structure in a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the deformation area of the original steel substrate 1 is heated to the AC of the steel material3Stopping heating and standing until the deformation is finished to obtain a stabilized steel structure joint, wherein the temperature is 30 ℃ above;
thirdly, repeating the steps for 2 times to obtain a solidified steel structure joint;
5) post-treatment
Putting the outer circle of the solidified steel structure joint obtained in the step 4) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the whole steel matrix 1 is heated to the AC of the steel material3And (3) quenching water to a stable temperature which is 30 ℃ above, and tempering the quenched solidified steel structure joint by adopting the oven prepared in the step 1) and the step three for 2 hours at the temperature of 200 ℃ to obtain a reinforced steel structure, wherein the reinforced steel structure is the steel structure joint which needs to be wrapped by the self-closing sleeve.
Example 3:
the whole is in accordance with example 1, with the difference that:
1) preparation before manufacture
Preparing raw materials: preparing a 30CrMnSi billet, and a bulb rod 3 and sufficient molybdenum disulfide powder which are obtained by carburizing, quenching and low-temperature tempering the surface of the 12CrNi3 billet;
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The manufacturing method of the steel structure joint with the self-closing outer layer is characterized by comprising the following steps:
1) preparation before manufacture
Preparing raw materials: preparing a steel billet with carbon content not higher than 0.3%, a ball head rod (3) with spherical hardness not lower than 50HRC and enough solid synovial membrane coating material;
preparing a tool: preparing a cylindrical closing-in tool (5) with an upper end opening corresponding to the shape of the finally designed steel matrix and conical surfaces of 30 degrees, 20 degrees and 10 degrees arranged outside and inside the opening, preparing a high-frequency induction tool corresponding to the outer circle of the finally designed steel matrix, and preparing a film coating tool corresponding to the inner arc of the finally designed steel matrix;
preparing equipment: preparing laser cladding equipment, a hydraulic device, an oven and a high-frequency induction device;
2) working of the steel substrate (1)
Firstly, processing the steel billet prepared in the step 1) into a two-section structure with a cylindrical lower end and an inverted cone upper end, wherein the inclination of a conical surface relative to an axis is 30 degrees, and the two-section structure is an initial steel structure;
vertically and downwards drilling a taper hole by taking the center of the upper end face of the initial steel structure obtained in the step I as a base point, wherein the angle of the top end of the taper hole is 60 degrees, and stopping drilling when a hole tip reaches the horizontal plane where the top end of the cylindrical surface at the lower end is positioned to obtain an open hole steel structure;
thirdly, on the middle taper hole surface of the middle open hole steel structure obtained in the second step, at the position which is close to the lower end of the taper hole surface and is located at the distance of 2/3-3/4 from the end surface, processing a circle of arc ring surface by taking the ball head radius of the ball head rod (3) prepared in the first step of the step 1) as the processing radius and taking the ring at the joint of the taper hole surface and the end surface as the center of a circle of a vertical section, and obtaining a prefabricated base body structure;
fourthly, the plane where the tip of the taper hole is located is taken as a reference, the tool withdrawal groove (2) with the depth equal to the length of the residual taper surface is processed by a process method for processing the tool withdrawal groove, and the required steel substrate (1) is obtained;
3) pretreatment of
Firstly, protecting and fixing a steel substrate (1) obtained in the stage 2) by adopting a film coating tool prepared in the step 1) and the step II, taking a solid slip film coating material prepared in the step 1) and the step II as a raw material, performing laser coating solid slip film treatment on the arc ring surface obtained in the step 2) by adopting laser cladding equipment, and solidifying a layer of solid slip film layer (4) with the thickness of 0.08mm-0.2mm on the arc ring surface to obtain a pretreated steel substrate (1);
4) closing-up sheath
Coaxially fixing a ball head rod (3) prepared in the step 1) and a pretreated steel base body (1) obtained in the step 3) and a cylindrical closing tool (5) prepared in the step 1) from top to bottom, and continuously applying vertical pressing force by adopting a hydraulic device prepared in the step 1) and the step III until the ball head rod (3) and the pretreated steel base body (1) move to be completely closed and fixed to obtain a closing and sheathing steel structure joint;
secondly, placing the outer circle of the necking and sheathing steel structure obtained in the step I into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the deformation area of the original steel substrate (1) is heated to the AC of the steel material3Stopping heating and standing until the deformation is finished to obtain a stabilized steel structure joint, wherein the temperature is 30-50 ℃ above;
thirdly, repeating the steps of the first step and the second step for 2 to 3 times to obtain a solidified steel structure joint;
5) post-treatment
Putting the outer circle of the solidified steel structure joint obtained in the step 4) into a high-frequency induction tool, and carrying out induction heating by adopting the high-frequency induction device prepared in the step 1) until the whole steel substrate (1) is heated to AC of the steel material3And (3) quenching water to a stable temperature which is 30-50 ℃ above the temperature, and tempering the quenched solidified steel structure joint by adopting the oven prepared in the step 1) and the temperature of 200-240 ℃ for 2-3 h to obtain a reinforced steel structure, wherein the reinforced steel structure is the steel structure joint which needs to be wrapped by the self-closing.
2. The method of manufacturing a self-wrapping, necked-in steel structural joint of claim 1, wherein: the steel matrix (1) adopts 10#The steel is manufactured, and the ball head rod (3) is obtained by adopting GCr6 to quench and temper at low temperature.
3. The method of manufacturing a self-wrapping, necked-in steel structural joint of claim 1, wherein: the steel matrix (1) is made of 20Cr, and the ball head rod (3) is obtained by nitriding the surface of 32Cr3 MoV.
4. The method of manufacturing a self-wrapping, necked-in steel structural joint of claim 1, wherein: the steel matrix (1) is made of 30CrMnSi, and the ball head rod (3) is obtained by surface carburizing, quenching and low-temperature tempering of 12CrNi 3.
5. The method of manufacturing a self-wrapping, necked-in steel structural joint of claim 1, wherein: the solid slip film coating material is any one of silver, iron sulfide and molybdenum disulfide.
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| CN201811378421.2A CN109281924B (en) | 2018-11-19 | 2018-11-19 | Steel structure joint with self-closing outer coating and manufacturing method thereof |
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| CN201811378421.2A CN109281924B (en) | 2018-11-19 | 2018-11-19 | Steel structure joint with self-closing outer coating and manufacturing method thereof |
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| CN109281924A CN109281924A (en) | 2019-01-29 |
| CN109281924B true CN109281924B (en) | 2020-10-23 |
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| CN108700105A (en) * | 2016-02-18 | 2018-10-23 | Zf腓特烈斯哈芬股份公司 | ball joint |
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| CN109281924A (en) | 2019-01-29 |
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