CN109630793B - Hydraulic bending lining core integrated piece and processing method thereof - Google Patents
Hydraulic bending lining core integrated piece and processing method thereof Download PDFInfo
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- CN109630793B CN109630793B CN201910112233.3A CN201910112233A CN109630793B CN 109630793 B CN109630793 B CN 109630793B CN 201910112233 A CN201910112233 A CN 201910112233A CN 109630793 B CN109630793 B CN 109630793B
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- 238000005452 bending Methods 0.000 title claims abstract 14
- 238000003672 processing method Methods 0.000 title abstract 2
- 238000007789 sealing Methods 0.000 claims abstract 22
- 230000005489 elastic deformation Effects 0.000 claims abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims 11
- 239000010959 steel Substances 0.000 claims 11
- 230000000149 penetrating effect Effects 0.000 claims 8
- 238000000034 method Methods 0.000 claims 3
- 238000005553 drilling Methods 0.000 claims 1
- 238000005242 forging Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 210000002268 wool Anatomy 0.000 claims 1
Classifications
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/062—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends specially adapted for use with attachments, e.g. reduction units, T-pieces, bends or the like
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a hydraulic bending lining core integrated piece and a processing method thereof, comprising a bending lining core, wherein a sealing round table, a connecting column body and a limiting step are sequentially formed at a first end from outside to inside; the connecting nut is sleeved outside the connecting cylinder, and an axial positioning piece is arranged between the connecting nut and the connecting cylinder and used for limiting the axial movement of the connecting nut relative to the connecting cylinder; the second end outer wall is provided with a core tail sealing groove and a buckling groove, the connecting sleeve is provided with a buckling protrusion matched with the buckling groove, after the connecting sleeve is buckled on the side wall of the second end sleeved with the hydraulic rubber tube, the inner side wall of the hydraulic rubber tube is adapted to the elastic deformation of the core tail sealing groove, so that the sealing protrusion embedded into the core tail sealing groove is formed, the service performance of the hydraulic bending lining core integrated piece can be improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic joints, in particular to a hydraulic bending lining core integrated piece and a processing method thereof.
Background
The hydraulic pipe joint is a part for connecting the high-pressure oil pipe and the high-pressure oil pipe in the hydraulic system, so that the oil pressure in the hydraulic pipe joint is extremely high, the hydraulic bending lining core integrated part is usually used for connecting the high-pressure oil pipes in different directions, and the hydraulic bending lining core integrated part has strict requirements on materials, structural strength and tightness because of the change of the oil conveying direction. The existing hydraulic pipe joint has poor sealing performance at the joint with the high-pressure oil pipe, complex processing technology, high processing difficulty and more raw material waste, and the bending lining core inner hole of the existing hydraulic pipe joint forms steps and vibration patterns after being processed, so that the surface quality is poor, the oil temperature in the working process of a hydraulic system is easy to rise, the flattening rate of the bending lining core does not reach the standard, and the service performance is not attractive and influenced.
Disclosure of Invention
The invention aims to provide a hydraulic bending lining core integrated piece and a processing method thereof, which are used for solving the problems in the prior art, improving the usability of the hydraulic bending lining core integrated piece and reducing the production cost.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a hydraulic bending lining core integrated piece which comprises a bending lining core, a connecting nut and a connecting sleeve, wherein the bending lining core is a pipe body with an axial inner hole communicated, the bending lining core comprises a first end head, a middle core body and a second end head which are sequentially connected, a sealing round table, a connecting column body and a limiting step are sequentially formed at the first end head from outside to inside, the large end of the sealing round table is connected with the connecting column body, a core head sealing groove is formed in the side wall of the sealing round table, and a sealing ring is embedded in the core head sealing groove; the connecting nut is sleeved outside the connecting cylinder and can rotate relative to the connecting cylinder, an axial positioning piece is arranged between the connecting nut and the connecting cylinder and used for limiting the axial movement of the connecting nut relative to the connecting cylinder, the end face of the connecting nut is contacted with the end face of the limiting step, and threads are arranged on the inner side wall of the connecting nut; the second end outer wall is provided with a core tail sealing groove and a buckling groove, the connecting sleeve is provided with a buckling protrusion matched with the buckling groove, the connecting sleeve is buckled on the side wall of the second end sleeved with the hydraulic rubber tube, the inner side wall of the hydraulic rubber tube is adapted to the elastic deformation of the core tail sealing groove, and the sealing protrusion embedded into the core tail sealing groove is formed.
Preferably, the axial positioning member comprises a steel wire, an inner groove for penetrating the steel wire is formed in the outer side wall of the connecting column, an outer groove for penetrating the steel wire and a steel wire penetrating hole are formed in the inner side wall of the connecting nut, the steel wire penetrating hole is communicated with the outer groove for penetrating the steel wire, and the steel wire penetrates from the steel wire penetrating hole to a limiting groove formed between the outer groove for penetrating the steel wire and the inner groove for penetrating the steel wire and is used for limiting the axial movement of the connecting nut relative to the connecting column.
Preferably, the core tail seal groove comprises an auxiliary seal groove and a strong seal groove, wherein the auxiliary seal groove and the strong seal groove are all provided with a plurality of, and the distance between two adjacent strong seal grooves is smaller than the distance between two adjacent auxiliary seal grooves.
Preferably, the cone apex angle of the sealing round platform is 24 degrees, the sealing ring is an O-shaped sealing ring, inner holes at two ends of the bending lining core are provided with round corners in a chamfering mode, and the radius of the round corners is 5mm.
The invention also provides a processing method of the hydraulic bending lining core integrated piece, which comprises the following steps:
step one: cutting the steel wool round material to obtain a blank column;
step two: using a hot forging die to hot forge the pier head of the blank cylinder, so that the diameter of one end of the blank cylinder is enlarged to form a big head end, and the other end is a core tail end;
step three: turning the big head end to obtain the sealing round table, the connecting cylinder and the limiting step, and turning the side wall of the sealing round table to form the core head sealing groove; turning the tail end of the core to obtain a core tail sealing groove and a buckling groove, and turning the middle part of the blank cylinder to obtain the middle core body;
step four: drilling holes along the axial direction of the blank cylinder to obtain a straight lining core;
step five: heating the straight lining core, and bending the straight lining core by using a reverse deformation bending device to obtain the bent lining core;
step six: the connecting nut and the connecting sleeve are respectively assembled on two ends of the bending lining core.
Preferably, the reverse deformation bending device comprises an R die, a movable die, a fixed die and a guide die, wherein the R die is a cylinder, the fixed die is fixedly connected to the side wall of the R die, an R die groove and a fixed die groove are respectively formed in the side wall of the R die and the side wall of the fixed die, the R die groove and the fixed die groove are connected and used for supporting the straight lining core, the movable die and the guide die are respectively provided with a movable die groove and a guide die groove, the guide die is driven by a guide die driving device and can be tightly pressed at one end of the straight lining core, the movable die is driven by the movable die driving device and can be tightly pressed at the other end of the straight lining core on the fixed die, so that the R die rotates around the axis of the R die, and the movable die and the fixed die rotate along with the R die and push the straight lining core to bend and deform through the limiting step, so as to obtain the bending lining core.
Preferably, the R model groove, the fixed model groove, the movable model groove and the guide model groove are cylindrical grooves, the cylindrical radius of the R model groove, the fixed model groove and the cylindrical radius of the movable model groove are the same as the outer radius of the middle core, the guide model groove comprises a first cylindrical surface, a second cylindrical surface and a third cylindrical surface which are connected in turn in the circumferential direction, the radiuses of the first cylindrical surface and the third cylindrical surface are the same and equal to the outer radius of the middle core, the radius of the second cylindrical surface is smaller than the outer radius of the middle core, and the opening width of the guide model groove is smaller than the outer diameter of the middle core.
Preferably, the guide model groove is an axisymmetric groove.
Preferably, the fixed mould is provided with a positioning protrusion, and the movable mould is provided with a positioning groove matched with the positioning protrusion.
Preferably, the mold further comprises a limiting insert, wherein the limiting insert is fixedly arranged on the R mold and used for limiting the bending angle of the straight lining core.
Compared with the prior art, the invention has the following technical effects:
according to the hydraulic bending lining core integrated piece, the connecting nut is in threaded connection with the transition joint, the connecting nut drives the sealing round table to extrude into the inner conical surface of the transition joint, the outer conical surface of the sealing round table and the inner conical surface of the transition joint are utilized to form an angle seal, and the sealing rings are further arranged on the outer conical surface of the sealing round table and the inner conical surface of the transition joint, so that double sealing of the angle seal and the sealing rings is realized, and the sealing performance of the connection of the hydraulic bending lining core integrated piece and the transition joint of the high-pressure oil pipe is effectively enhanced. The lining core tail is provided with the core tail sealing groove, after the connecting sleeve is buckled on the side wall of the second end sleeved with the hydraulic rubber pipe, the inner side wall of the hydraulic rubber pipe is adapted to the elastic deformation of the core tail sealing groove, so that the sealing bulge embedded into the core tail sealing groove is formed, the connection tightness of the hydraulic bending lining core integrated piece and the hydraulic rubber pipe is improved, the impulse impact of the hydraulic system can be effectively resisted, and the compactness of the final buckling with the rubber pipe is guaranteed.
The processing method of the hydraulic bending lining core integrated piece provided by the invention is simple in processing, the hot forging pier head can effectively save raw materials, the lining core inner hole can be obtained by one-time drilling and forming, steps and vibration patterns cannot be formed after the lining core inner hole is processed, the surface quality is high, the oil temperature in the working process of a hydraulic system is effectively reduced, the bending is performed by using the reverse deformation bending device, the bending lining core flatness is reduced, the appearance is attractive, and the use performance is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a hydraulic bending lining core integrated connecting sleeve in the first embodiment after being buckled on a hydraulic rubber tube;
FIG. 2 is a schematic view of the structure of the first embodiment before the hydraulic bending lining core integrated connecting sleeve is buckled on the hydraulic rubber tube;
FIG. 3 is a schematic structural view of a bending core of a hydraulic bending core integrated piece according to the first embodiment;
FIG. 4 is a schematic structural view of a connecting nut of a hydraulic bending lining core integrated piece in the first embodiment;
FIG. 5 is a schematic diagram of the shape of a blank cylinder after the pier head is hot-forged to the blank cylinder by using a hot forging die in the second embodiment;
FIG. 6 is a schematic diagram showing a state before bending a straight core by using a reverse deformation bending device in the second embodiment;
FIG. 7 is a schematic diagram showing a state after bending a straight core by using a reverse deformation bending device in the second embodiment;
FIG. 8 is a schematic cross-sectional view of a guide die of a reverse deformation bending apparatus;
in the figure: 1-bending a lining core; 11-a first head; 12-a middle core; 13-a second end; 131-auxiliary seal groove; 132-a strong seal groove; 14-sealing the round platform; 15-connecting columns; 151-penetrating the steel wire inner groove; 16-a core print seal groove; 17-limiting steps; 18-buckling grooves; 19-fillets; 2-connecting nuts; 21-penetrating the steel wire outer groove; 22-threading a steel wire hole; 3-connecting the sleeve; 31-buckling the bulge; 41-big head end; 42-core tail end; 5-R die; 6, a movable mould; 7-fixing the mould; 8-guiding a mold; 9-limiting inserts; 10-a hydraulic rubber hose.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a hydraulic bending lining core integrated piece and a processing method thereof, which are used for solving the problems in the prior art, improving the usability of the hydraulic bending lining core integrated piece and reducing the production cost.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a hydraulic bending lining core integrated piece, which comprises a bending lining core 1, a connecting nut 2 and a connecting sleeve 3, wherein the bending lining core 1 is a pipe body with a through inner hole, the bending lining core 1 comprises a first end 11, a middle core 12 and a second end 13 which are sequentially connected, the first end 11 is sequentially formed with a sealing round table 14, a connecting column 15 and a limiting step 17 from outside to inside, the large end of the sealing round table 14 is connected with the connecting column 15, a core head sealing groove 16 is formed on the side wall of the sealing round table 14, and a sealing ring is embedded in the core head sealing groove 16; the connecting nut 2 is sleeved outside the connecting cylinder 15 and can rotate relative to the connecting cylinder 15, an axial positioning piece is arranged between the connecting nut 2 and the connecting cylinder 15 and used for limiting the axial movement of the connecting nut 2 relative to the connecting cylinder 15, the end face of the connecting nut 2 is contacted with the end face of the limiting step 17, and threads are arranged on the inner side wall of the connecting nut 2; the second end 13 is provided with a core tail sealing groove and a buckling groove 18 on the outer wall, the core tail sealing groove and the buckling groove 18 are annular grooves, the connecting sleeve 3 is provided with buckling protrusions 31 matched with the buckling groove 18, and after the connecting sleeve 3 is buckled on the side wall of the second end 13 sleeved with the hydraulic rubber tube, the inner side wall of the hydraulic rubber tube is adapted to the elastic deformation of the core tail sealing groove to form annular sealing protrusions embedded into the core tail sealing groove.
The outer diameters of the limiting step 17, the connecting column 15 and the middle core body 12 are 42mm, 33mm and 30mm respectively, and the diameter of the inner hole of the lining core is 19mm.
The hydraulic bending lining core integrated piece provided by the embodiment is in threaded connection with the transition joint through the connecting nut 2, the connecting nut 2 drives the sealing circular table 14 to extrude into the inner conical surface of the transition joint, the outer conical surface of the sealing circular table 14 is utilized to form an angle seal with the inner conical surface of the transition joint, and the sealing ring is further arranged on the outer conical surface of the sealing circular table 14 and the inner conical surface of the transition joint, so that double sealing of the angle seal and the sealing ring seal is realized, and the sealing performance of the hydraulic bending lining core integrated piece connected with the transition joint of the high-pressure oil pipe is effectively enhanced. The lining core tail sets up the core tail seal groove, withholds connecting sleeve 3 on the lateral wall of the second end 13 that the cover was equipped with the hydraulic pressure rubber tube, and the inside wall adaptation core tail seal groove elastic deformation of hydraulic pressure rubber tube forms the sealed arch of embedding to the core tail in the seal groove, has improved the connection leakproofness of hydraulic pressure bending lining core integral part and hydraulic pressure rubber tube, can effectively resist hydraulic system's pulse impact, guarantee at last with the compactness of rubber tube withholding.
The axial positioning piece comprises a steel wire, a steel wire penetrating inner groove 151 is formed in the outer side wall of the connecting column body 15, a steel wire penetrating outer groove 21 and a steel wire penetrating hole 22 are formed in the inner side wall of the connecting nut 2, the steel wire penetrating hole 22 is communicated with the steel wire penetrating outer groove 21, and the steel wire penetrates into a limiting groove formed between the steel wire penetrating outer groove 21 and the steel wire penetrating inner groove 151 from the steel wire penetrating hole 22 to limit the axial movement of the connecting nut 2 relative to the connecting column body 15.
In order to further enhance the connection tightness of the hydraulic bending lining core integrated piece and the hydraulic rubber tube, the core tail sealing groove comprises an auxiliary sealing groove 131 and a strong sealing groove 132, the auxiliary sealing groove 131 and the strong sealing groove 132 are all provided with a plurality of, and the distance between two adjacent strong sealing grooves 132 is smaller than the distance between two adjacent auxiliary sealing grooves 131.
The cone apex angle of the sealing round table 14 is 24 degrees, and the sealing ring is an O-shaped sealing ring.
The inner holes at two ends of the bending lining core 1 are provided with the round corners 19 in a chamfering way, so that the flow speed of hydraulic oil can be effectively improved in a hydraulic system, the resistance generated by steps is reduced, the rise of the oil temperature can be reduced, the whole hydraulic system is well promoted, and the radius of the round corners 19 is 5mm.
Example two
The embodiment provides a processing method of a hydraulic bending lining core integrated piece in the first embodiment, which comprises the following steps:
step one: cutting the steel wool round material to obtain a blank column; specifically, the diameter isCutting the 45# steel wool round material into a blank cylinder with the length of 353mm (the length of the straight lining core is 350 mm) and the weight of 2880g by a sawing machine;
step two: using a hot forging die to hot forge the pier head of the blank cylinder, as shown in fig. 5, making one end of the blank cylinder have a larger diameter to form a big head end 41, and the other end is a core tail end 42; the hot-forged blank cylinder is transferred into a heat-preserving barrel through a conveying belt, the heat-preserving barrel is made of Q235 material and subjected to aluminizing treatment, and heat-preserving asbestos is additionally arranged on the periphery of the heat-preserving barrel and a barrel cover, so that the heat-preserving effect on the hot-forged blank is achieved, internal stress generated by too high cooling speed is avoided, the blank is softened, and subsequent processing is facilitated.
Step three: the blank after hot forging upsetting can be directly finish-turned and processed as the machining allowance is relatively small; firstly, clamping a blank, turning a big head end 41 at the middle part of the blank to obtain a sealing round table 14, a connecting column 15 and a limiting step 17, turning a core seal groove 16 on the side wall of the sealing round table 14, and chamfering an R angle of R5 on the end surface; then, clamping the middle part of the blank, turning the core tail end 42, obtaining a core tail sealing groove and a buckling groove 18, and machining a chamfer angle of a chamfer R5 of the end face; finally, the large head end 41 is clamped, the tail part of the lining core is tightly propped against the middle part of the turning blank cylinder by using a center, the middle part is not connected with a knife and is under one knife, the generation of a middle step is avoided, and a middle core body is obtained;
step four: drilling holes along the axial direction of the blank cylinder to obtain a straight lining core; the inner hole of the lining core is processed on an inverted deep hole machine tool at one time by adopting a high-pressure inner cold gun drill, the gun drill is installed in an inverted mode, the tail end 42 of the core is placed into a positioning drill sleeve of the gun drill machine tool, the upper surface of the lining core is hydraulically pressed by a gun drill punching and jacking block, the gun drill discharges scrap iron in the gun drill downwards along the positioning drill sleeve Kong Dajin by utilizing a high-pressure oil pump, and the discharged scrap iron is in a chip shape, so that the damage to the processed surface caused by the scrap iron discharge is avoided;
step five: heating the straight lining core, and bending the straight lining core by using a reverse deformation bending device to obtain a bent lining core 1;
step six: fitting the connecting nut 2 and the connecting sleeve 3 to both ends of the bent bushing core 1, respectively; the pneumatic steel wire penetrating nut assembly machine is used for assembling and processing the steel wire penetrating nut and the ultra-long lining core, so that the assembly efficiency and the assembly quality are improved, the organic glass semi-closed protection is additionally arranged, the personal safety is ensured, and the assembly operation is convenient; the hydraulic buckling press is adopted to buckle and assemble the overlength hydraulic bending lining core 1 and the hydraulic integrated sleeve by adopting the Finnish Fenbao NC201S20 buckling press, the buckling press is controlled by a PLC microcomputer, the buckling precision can reach +/-0.02, and the buckling size is greatly ensured.
The processing method of the hydraulic bending lining core integrated piece provided by the invention is simple in processing, the hot forging pier head can effectively save raw materials, the lining core inner hole can be obtained by one-time drilling and forming, steps and vibration patterns cannot be formed after the lining core inner hole is processed, the surface quality is high, the oil temperature in the working process of a hydraulic system is effectively reduced, the bending is performed by using the reverse deformation bending device, the bending lining core flatness is reduced, the appearance is attractive, and the use performance is improved.
The invention adopts the diameter ofThe 45# steel blank round material is cut into 381mm long by a sawing machine, the weight is about 2880g, and a lining core blank is formed by hot forging upsetting, so that 1530g can be saved compared with the weight of the original same product material, the yield can be improved by 38% in 8 hours a day, raw materials are saved, and the production cost is effectively reduced.
Compared with the cost of drilling holes and then boring holes firstly, the cost of drilling holes by using the gun drill is saved by 1.3 yuan/unit, and because the gun drill is drilled at one time, no step exists in the middle, the smoothness can reach Ra3.2mu m, and the integral quality of the hydraulic bending lining core integral piece is effectively improved.
As shown in fig. 6 to 8, the reverse deformation bending device comprises an R die 5, a movable die 6, a fixed die 7 and a guide die 8,R, wherein the R die 5, the movable die 6, the fixed die 7 and the guide die 8,R are cylindrical, the fixed die 7 is fixedly connected to the side wall of the R die 5, an R model groove and a fixed model groove are respectively formed in the side wall of the R die 5 and the side wall of the fixed die 7, the R model groove is connected with the fixed model groove and used for supporting a straight lining core, a movable model groove and a guide model groove are respectively formed in the movable die 6 and the guide die 8, the guide die 8 is driven by a guide die driving device and can be tightly pressed on one end of the straight lining core, the inner side wall of the guide model groove is contacted with the outer side wall of the straight lining core, the movable die 6 is driven by a movable die driving device, and the other end of the straight lining core is tightly pressed on the fixed die; specifically, the guide die 8 is driven by a guide die driving device to slide along a guide die sliding rail to a rear locking position pressed on one end of the straight lining core, and the movable die 6 is driven by a movable die driving device to slide along a movable die sliding rail to a rear locking position pressed on the other end of the straight lining core; after that, the R die is controlled to rotate around the axis of the R die, the movable die 6 and the fixed die 7 rotate along with the R die 6 and push the straight lining core to bend and deform through the limiting step 17, so that the bent lining core 1 is obtained.
The reverse deformation bending device adopts a hot die steel material H13 for hot forging processing to process, and avoids adverse annealing influence on the die due to overhigh product temperature, thereby ensuring the service life of the die and the processing quality of the hydraulic bending lining core integrated piece.
The R model groove, the fixed model groove, the movable model groove and the guide model groove are cylindrical grooves, the cylindrical radii of the R model groove, the fixed model groove and the movable model groove are the same as the outer circular radius of the middle core 12, the guide model groove comprises a first cylindrical surface, a second cylindrical surface and a third cylindrical surface which are connected in turn in the circumferential direction, the radii of the first cylindrical surface and the third cylindrical surface are the same and equal to the outer circular radius of the middle core 12 by 15mm, the radius of the second cylindrical surface is smaller than the outer circular radius of the middle core 12 by 12.5mm, and the opening width of the guide model groove is smaller than the outer diameter of the middle core 12 by 29.4mm.
The groove shape of the guide model of the reverse deformation bending device adopts a reverse deformation double R design, the flatness of the bent lining core is improved to be within 1.1 from the original 1.3, and the attractiveness and the use new energy of the lining core are improved.
The guide mold groove is an axisymmetric groove symmetric about the guide mold axis.
The fixed mould is provided with a positioning bulge, and the movable mould is provided with a positioning groove matched with the positioning bulge.
The reverse deformation bending device further comprises a limiting insert 9, and the limiting insert 9 is fixedly arranged on the R die 5 and used for limiting the bending angle of the straight lining core.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (4)
1. The utility model provides a hydraulic pressure lining core integrated component that bends which characterized in that: the bending lining core is a pipe body with an axial inner hole communicated, the bending lining core comprises a first end head, a middle core body and a second end head which are sequentially connected, a sealing round table, a connecting cylinder and a limiting step are sequentially formed at the first end head from outside to inside, the large end of the sealing round table is connected with the connecting cylinder, a core head sealing groove is formed in the side wall of the sealing round table, and a sealing ring is embedded in the core head sealing groove; the connecting nut is sleeved outside the connecting cylinder and can rotate relative to the connecting cylinder, an axial positioning piece is arranged between the connecting nut and the connecting cylinder and used for limiting the axial movement of the connecting nut relative to the connecting cylinder, the end face of the connecting nut is contacted with the end face of the limiting step, and threads are arranged on the inner side wall of the connecting nut; the second end is provided with a core tail sealing groove and a buckling groove, the connecting sleeve is provided with a buckling protrusion matched with the buckling groove, and after the connecting sleeve is buckled on the side wall of the second end sleeved with the hydraulic rubber tube, the inner side wall of the hydraulic rubber tube is adapted to the elastic deformation of the core tail sealing groove to form a sealing protrusion embedded into the core tail sealing groove;
the axial positioning piece comprises a steel wire, a steel wire penetrating inner groove is formed in the outer side wall of the connecting column, a steel wire penetrating outer groove and a steel wire penetrating hole are formed in the inner side wall of the connecting nut, the steel wire penetrating hole is communicated with the steel wire penetrating outer groove, and the steel wire penetrates into a limiting groove formed between the steel wire penetrating outer groove and the steel wire penetrating inner groove from the steel wire penetrating hole and is used for limiting the axial movement of the connecting nut relative to the connecting column;
the core tail seal groove comprises an auxiliary seal groove and a strong seal groove, wherein the auxiliary seal groove and the strong seal groove are all provided with a plurality of, and the distance between every two adjacent strong seal grooves is smaller than the distance between every two adjacent auxiliary seal grooves.
2. The hydraulically curved core integral piece of claim 1, wherein: the cone apex angle of the sealing round platform is 24 degrees, the sealing ring is an O-shaped sealing ring, inner holes at two ends of the bending lining core are provided with round corners in a chamfering mode, and the radius of the round corners is 5mm.
3. A method for processing a hydraulic bending lining core integrated piece according to any one of claims 1-2, which is characterized in that: the method comprises the following steps:
step one: cutting the steel wool round material to obtain a blank column;
step two: using a hot forging die to hot forge the pier head of the blank cylinder, so that the diameter of one end of the blank cylinder is enlarged to form a big head end, and the other end is a core tail end;
step three: turning the big head end to obtain the sealing round table, the connecting cylinder and the limiting step, and turning the side wall of the sealing round table to form the core head sealing groove; turning the tail end of the core to obtain a core tail sealing groove and a buckling groove, and turning the middle part of the blank cylinder to obtain the middle core body;
step four: drilling holes along the axial direction of the blank cylinder to obtain a straight lining core;
step five: heating the straight lining core, and bending the straight lining core by using a reverse deformation bending device to obtain the bent lining core;
step six: assembling the connecting nut and the connecting sleeve to two ends of the bending lining core respectively;
the reverse deformation bending device comprises an R die, a movable die, a fixed die and a guide die, wherein the R die is a cylinder, the fixed die is fixedly connected to the side wall of the R die, an R model groove and a fixed model groove are respectively formed in the side wall of the R die and the side wall of the fixed die, the R model groove is connected with the fixed model groove and used for supporting the straight lining core, the movable die and the guide die are respectively provided with a movable model groove and a guide model groove, the guide die is driven by a guide die driving device and can be tightly pressed at one end of the straight lining core, the movable die is driven by the movable die driving device and can be tightly pressed at the other end of the straight lining core on the fixed die, so that the R die rotates around the axis of the R die, and the movable die and the fixed die rotate along with the R die and push the straight lining core to bend and deform through a limiting step to obtain the bent lining core;
the R model groove, the fixed model groove, the movable model groove and the guide model groove are cylindrical grooves, the cylindrical radii of the R model groove, the fixed model groove and the movable model groove are the same as the outer circular radius of the middle core, the guide model groove comprises a first cylindrical surface, a second cylindrical surface and a third cylindrical surface which are connected in turn in the circumferential direction, the radii of the first cylindrical surface and the third cylindrical surface are the same and are equal to the outer circular radius of the middle core, the radius of the second cylindrical surface is smaller than the outer circular radius of the middle core, and the opening width of the guide model groove is smaller than the outer diameter of the middle core;
the fixed mould is provided with a positioning bulge, and the movable mould is provided with a positioning groove matched with the positioning bulge;
the linear lining core bending device comprises an R die, and is characterized by further comprising a limiting insert, wherein the limiting insert is fixedly arranged on the R die and used for limiting the bending angle of the linear lining core.
4. A method of processing according to claim 3, wherein: the guide model groove is an axisymmetric groove.
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