CN218252699U

CN218252699U - Cold heading mould for forming double-pier-head joint of pipe fitting

Info

Publication number: CN218252699U
Application number: CN202222558131.4U
Authority: CN
Inventors: 蒲博伟; 张伟; 方少鸽; 冯早阳; 黄敬喜; 张天乐
Original assignee: Linhai Aofa Pipe Co ltd
Current assignee: Linhai Aofa Pipe Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-01-10
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a two mound heads of pipe fitting connect shaping to use cold-heading mould belongs to cold-heading mould technical field, including mould body and die block, be equipped with the positioning hole who is used for hooping the tubular metal resonator main part section on the mould body, the end of mould body is equipped with the joint shaping groove with the positioning hole intercommunication, it supplies die block along axially sliding's guide member to connect the shaping inslot, be equipped with the guide through hole who is used for hooping the tubular metal resonator joint section middle part on the die block, it can make both possess gapped elastic support component to be equipped with between the tank bottom of die block and joint shaping groove, the tail end that the clearance allows to receive the joint section of axial impact is at its inside radial expansion, the die block is equipped with the compression district that is used for holding radial expansion's joint section head end towards the one side of drift, the die block is equipped with the extrusion district that the atress can extrude expansion's joint section tail end towards positioning hole's one side. Through once strikeing, alright accomplish the shaping of two pier nose, pier nose machining error is little after the shaping, and machining efficiency is high.

Description

Cold-heading mould is used in shaping of two pier nose joints of pipe fitting

Technical Field

The utility model relates to a cold-heading mould technical field especially relates to a two pier nose of pipe fitting connect forming to use cold-heading mould.

Background

In order to be connected with other pipelines or devices, a warm air pipe of an automobile air conditioner usually can be provided with two pier heads at the pipe end of a pipe fitting so as to form a joint section with double pier heads, then a clamp is arranged between the two pier heads of the joint section, and the warm air pipe is connected and fixed with other pipelines through the clamp. When the joint section of the double pier heads is processed by the existing pipe fitting, a processing mode of one piece of equipment is generally adopted twice, namely, one pier head is processed firstly, then a clamping die and a punch are replaced, and the other pier head is processed. However, the pier head is machined twice, so that not only is the mold change required and the time wasted, but also the consistency of the product is different due to twice clamping, and the size deviation of the pier head is caused. Therefore, the patent number is 'CN 107186141B', the patent name is 'a double-punch upsetting machine' and discloses an upsetting machine with two punches, which comprises a rack, wherein a liquid-filled oil tank is arranged at the upper part of the rack and is communicated with a main cylinder fixed on the rack, a piston rod of the main cylinder is connected with a movable beam, the movable beam is connected with a return cylinder fixed on the rack, the lower part of the movable beam is connected with an upper die holder, and an upper female die is arranged on the upper die holder; the lower female die matched with the upper female die is arranged on the lower die holder, the lower die holder is connected with the rack workbench, a punch side shifting device is connected to the rack on the side of the rack workbench, two punches arranged on the punch side shifting device are matched with the rack workbench, and the punch side shifting device is connected with a piston rod of the upsetting cylinder. During impact, the punch side shifting device alternately pushes the first-pass punch and the second-pass punch into a working position to finish two-pass upsetting, so that the die change time is saved, but the punch side shifting device still performs impact twice because the essence of the punch side shifting device is not changed, the consistency of products cannot be guaranteed, and the size deviation of a pier is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving above-mentioned technical problem, provide a two pier nose of pipe fitting connect cold-heading mould for shaping, once strike through the drift, alright accomplish two pier nose's formation simultaneously, need not the retooling, both guaranteed machining efficiency, by the deviation problem of having avoided twice processing to cause the pier nose size, the shaping back outward appearance is pleasing to the eye, and two pier nose machining dimension precision are high.

In order to achieve the above object, the utility model provides a following scheme: the utility model discloses a two pier nose of pipe fitting connect shaping with cold-heading mould, including mould body and profiling piece, be equipped with the positioning hole who is used for hooping the main part section of tubular metal resonator on the mould body, the end of mould body be equipped with the tank bottom with the joint shaping groove of positioning hole intercommunication, it supplies to connect the shaping inslot be equipped with the profiling piece and follow positioning hole's endwise slip's guide member, be equipped with on the profiling piece and be used for hooping the guide through hole at the joint section middle part of tubular metal resonator, the profiling piece with it can make both possess gapped elastic support member to be equipped with between the tank bottom of joint shaping groove, the clearance allows to receive axial impact the tail end of joint section is at its inside radial expansion, the profiling piece is equipped with towards the one side of drift and is used for holding because of receiving axial impact the compression district of the head end of joint section, the profiling piece orientation positioning hole's one side is equipped with the atress can extrude the expansion the extrusion district of the tail end of joint section.

Preferably, the guide member comprises a guide screw, the guide screw comprises a polished rod section and a threaded section in threaded connection with the bottom of the connector forming groove, and one end, far away from the threaded section, of the polished rod section is provided with an anti-off screw cap; the pressing block is provided with a sliding through hole which is surrounded by the pressed area, the sliding through hole comprises a circular hole section and a reaming section, the circular hole section is connected with the polished rod section in a sliding mode, the reaming section is used for containing the anti-falling screw cap, and the diameter of the anti-falling screw cap is larger than that of the circular hole section.

Preferably, the elastic supporting member comprises a return compression spring sleeved on the polished rod section, and the sliding through hole further comprises an accommodating section for accommodating the return compression spring.

Preferably, the die body comprises an upper die and a lower die, and the upper die and the lower die are correspondingly provided with a positioning groove for forming a positioning through hole and a joint groove for forming a joint forming groove; the pressing block comprises an upper pressing block and a lower pressing block, and guide grooves for forming guide through holes are correspondingly formed in the upper pressing block and the lower pressing block.

Preferably, the upper pressing block and the lower pressing block are both provided with anti-falling grooves which are convenient for fingers to pinch.

Preferably, the upper die and the lower die are correspondingly provided with positioning pin holes.

Preferably, the upper die and the lower die are rectangular bodies.

Preferably, the side walls of the upper die and the lower die are provided with anti-slip grooves convenient to separate.

Preferably, the end of the punch is provided with an impact slot comprising a large diameter cylindrical section capable of accommodating the head end of the radially expanded joint section and a small diameter cylindrical section of a diameter matching the diameter of the head end of the unexpanded joint section.

Preferably, the end of the punch is provided with an impact groove, the impact groove comprises a circular table section and a cylindrical section capable of accommodating the head end of the joint section which expands radially, the large-diameter end of the circular table section is connected with the cylindrical section, and the cylindrical section and the circular table section are sequentially arranged from outside to inside along the axial direction of the impact groove.

The utility model discloses for prior art gain following technological effect:

1. the utility model discloses an among the cold-heading mould, cooling tube main part section is because positioning hole's cramp, when the drift strikes, cooling tube main part section can not take place to remove, and cramp the cooling tube coupling section in the guiding hole, axial displacement then takes place under the drive of die mould piece, thereby make the cooling tube be located the outside head end of guiding hole and the tail end that is located the clearance take place radial expansion, then the head end inflation presss from both sides into first pier nose under drift and die mould piece compression district combined action, the tail end inflation presss from both sides into second pier nose under the tank bottom combined action of die mould piece extrusion district and joint shaping groove, thereby through drift once impact, cold-heading one shot forming process who carries out two pier noses to the pipe fitting head portion has been accomplished, because be one shot forming, the size that secondary forming leads to can not appear the problem of error, it is pleasing to save labour the shaping back outward appearance pleasing to the eye, two pier nose machining dimension uniformity is good, and production efficiency has been promoted, and time saving.

2. The utility model provides a mould body and die mould piece all are the components of a whole that can function independently setting, through going up mould and lower mould die sinking and compound die, going up die mould piece and die mould piece compound die down, are more convenient for lay and take out the tubular metal resonator.

3. The utility model discloses well drift has two kinds to can form the double pier nose of tubular metal resonator of two kinds and connect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a front view of a die body;

FIG. 2 is a longitudinal sectional view of the die body;

FIG. 3 is a top view of the die body;

FIG. 4 is a cross-sectional view of a profiling block;

FIG. 5 is a cross-sectional view of a type I punch;

FIG. 6 is a cross-sectional view of a type II punch;

FIG. 7 is a schematic structural view of a type I metal tube;

FIG. 8 is a schematic view of the structure of a type II metal tube.

Description of reference numerals: 1. an upper die; 2. a lower die; 3. pressing the blocks; 4. pressing the block; 5. resetting the pressure spring; 6. a guide screw; 7. positioning the through hole; 8. a joint forming groove; 9. a guide through hole; 10. a reaming section; 11. a circular bore section; 12. an accommodating section; 13. an anti-drop nail cap; 14. a polished rod section; 15. a threaded segment; 16. an anti-drop groove; 17. a positioning pin hole; 18. an anti-slip groove; 19. a gap; 20. a punch; 21. a large diameter cylindrical section; 22. a small diameter cylinder section; 23. a cylindrical section; 24. a circular table section; 25. a metal tube; 26. a first pier head; 27. a second pier head; 28. a hose cushion cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The embodiment provides a cold heading mould for forming a double-pier-head joint of a pipe fitting, which comprises a mould body and a pressing block as shown in figures 1 to 8. The mould body is provided with a positioning through hole 7 for hooping the main body section of the metal pipe 25, the end of the mould body is provided with a joint forming groove 8, and the bottom of the joint forming groove 8 is communicated with the positioning through hole 7. A guide component is arranged in the joint forming groove 8, and the profiling block can only slide along the axial direction of the positioning through hole 7 under the limiting of the guide component. The profiling block is provided with a guide through hole 9, the middle of a joint section of the metal pipe 25 for forming a joint can be hooped by the guide through hole 9 to prevent the joint section from sliding, and the guide through hole 9 and the positioning through hole 7 are coaxially arranged. An elastic supporting component is arranged between the profiling block and the groove bottom of the joint forming groove 8, a gap 19 is formed between the profiling block and the groove bottom of the joint forming groove 8 under the elastic force action of the elastic supporting component, when the joint section of the metal pipe 25 is axially impacted by the punch 20, the tail end of the joint section of the metal pipe 25 can radially expand, and the gap 19 enables the tail end of the joint section which radially expands to have an expansion space. The die mould piece is equipped with the compression district towards the one side of drift 20, the head end of radial expansion's joint section can be held in the compression district when the head end of joint section is impacted radially because of drift 20 axial, with the first pier nose 26 of the head end formation that the cooperation drift 20 extrudeed messenger joint section, the die mould piece is equipped with the extrusion district towards the one side of positioning hole 7, the extrusion district can receive the drift 20 extrusion and extrude the expanded tail end of metal pipe 25 joint section when moving to the tank bottom that connects the shaping groove 8 at the die mould piece, with the cooperation and connect the extrusion messenger joint section's of 8 tank bottoms of shaping groove tail end formation second pier nose 27.

The working principle is as follows:

firstly, a main body section of a metal pipe 25 is placed into a positioning through hole 7 of a die body, and a joint section of the metal pipe 25 for forming a joint is placed into a guide through hole 9; then, the punch 20 is driven by the punch to move towards the joint section of the metal pipe 25 along the axial direction of the positioning through hole 7, then the joint section of the metal pipe 25 is punched, at this time, under the pushing of the punch 20, because the main body section of the metal pipe 25 is clamped by the positioning through hole 7 and cannot move, and the stressed forming block moves towards the positioning through hole 7 along the guide member, at this time, the guide through hole 9 can drive the joint section of the metal pipe 25 to move together, because the middle part of the joint section of the metal pipe 25 is clamped by the guide through hole 9, radial expansion cannot occur here, and the head end of the joint section of the metal pipe 25 outside the guide through hole 9 and the tail end of the joint section of the metal pipe 25 at the gap 19 can simultaneously expand because the head end and the tail end of the joint section of the metal pipe 25 are not clamped by the guide through hole 9; then, as the pressing block continues to move, the pressing area of the pressing block and the bottom of the joint forming groove 8 clamp the expanded tail end of the joint section of the metal pipe 25, the pressing area of the pressing block cooperates with the punch 20 to clamp the expanded head end of the joint section of the metal pipe 25, and after the pressing block is in place, the expanded head end of the joint section of the metal pipe 25 is clamped into a first pier 26, and the expanded tail end of the joint section of the metal pipe 25 is clamped into a second pier 27, referring to fig. 7 and 8; finally, the punch 20 is retracted away from the die body, and the metal tube 25 can be taken out, because the die body can be split type or integrated type, the metal tube 25 can be taken down by disassembling the die body in a split type, and the pressing block is firstly disassembled in the integrated type, and then the metal tube 25 is pulled out.

In use of the metal pipe 25 with double pier heads, referring to fig. 8, the hose grommet 28 is inserted from the first pier head 26 of the metal pipe 25 to the middle of the joint section of the metal pipe 25, so that the hose grommet 28 is located between the first pier head 26 and the second pier head 27, and a clip can be assembled outside the first pier head 26 for connecting with other pipes or interfaces. First pier head 26 and second pier head 27 can play sealed, prevent that the hose cushion cover 28 from pulling off the effect, therefore first pier head 26 and second pier head 27's diameter can not be big, also not too little, and too big hose cushion cover 28 can not insert, and little hose cushion cover 28 breaks away from tubular metal resonator 25.

In this embodiment, as shown in fig. 1 to 8, the guide member includes a guide screw 6, the guide screw 6 includes an anti-off screw cap 13, a polished rod section 14 and a threaded section 15, and the polished rod section 14 is located between the anti-off screw cap 13 and the threaded section 15. The profiling block is provided with a sliding through hole which is arranged around the compression area in a surrounding mode, the sliding through hole comprises a round hole section 11 and a hole expanding section 10, and the round hole section 11 is located at one end, close to the bottom of the connector forming groove 8, of the profiling block. The bottom of the joint forming groove 8 is provided with a threaded hole corresponding to the sliding through hole, the threaded section 15 of the guide screw 6 penetrates through the sliding through hole and then is in threaded connection with the threaded hole, the polished rod section 14 is in sliding connection with the round hole section 11, the anti-falling screw cap 13 is left in the hole expanding section 10, and the diameter of the anti-falling screw cap 13 is larger than that of the round hole section 11 so as to prevent the profiling block from being separated from the guide screw 6 from the polished rod section 14.

In this embodiment, as shown in fig. 1 to 8, the elastic support member includes a return compression spring 5 sleeved on the polished rod section 14. The sliding through hole further comprises an accommodating section 12, the diameter of the accommodating section 12 and the diameter of the reset pressure spring 5 are larger than that of the polished rod section 14, one end of the reset pressure spring 5 is abutted in the accommodating section 12, the other end of the reset pressure spring 5 is abutted at the bottom of the joint forming groove 8 to provide elastic support, and a gap 19 is formed between the pressing block and the bottom of the joint forming groove 8 in the initial state.

In consideration of the convenience of the placement and removal of the metal pipe 25, in the present embodiment, as shown in fig. 1 to 8, the die body and the profiling block adopt a split structure. The mould body includes mould 1 and lower mould 2, goes up the last positioning groove and the top connection recess that are equipped with the intercommunication on the mould 1, is equipped with positioning groove and lower clutch recess down on the lower mould 2, after the compound die of mould 1 and lower mould 2, goes up positioning groove and positioning groove forms positioning hole 7 down, and top connection recess and lower clutch recess form and connect shaping groove 8. The pressing block comprises an upper pressing block 3 and a lower pressing block 4, an upper guide groove is formed in the upper pressing block 3, a lower guide groove is formed in the lower pressing block 4, and after the upper pressing block 3 and the lower pressing block 4 are combined, the upper guide groove and the lower guide groove form a guide through hole 9.

Split mold use introduction:

firstly, after a mould body is assembled on a device which moves transversely and is tightened vertically, an upper metal pipe 25 is placed in a downward positioning groove and a lower guide groove, a main body section of the metal pipe 25 is positioned in the lower positioning groove, and the middle part of a joint section of the metal pipe 25 is positioned in the lower guide groove; then, starting the equipment, pushing the upper die 1 by the oil cylinder to move downwards and closing the lower die 2, clamping the main body section of the metal pipe 25 by the upper positioning groove and the lower positioning groove, and clamping the joint section of the metal pipe 25 by the upper guide groove and the lower guide groove, so that the double pier heads can be machined; finally, after the processing is finished, the upper die 1 is lifted upwards under the driving of the oil cylinder, so that the upper die is far away from the lower die 2, the metal pipe 25 can be taken out, and the first pier head 26 and the second pier head 27 cannot be damaged.

In order to prevent the upper pressing block 3 and the lower pressing block 4 from being released when the upper pressing block 3 and the lower pressing block 4 are mounted on the upper die 1 and the lower die 2, in the present embodiment, as shown in fig. 1 to 8, anti-release grooves 16 for facilitating finger pinching are provided on both sides of the upper pressing block 3.

In this embodiment, as shown in fig. 1 to 8, the positioning pin holes 17 are correspondingly formed in the upper die 1 and the lower die 2, and after the positioning pins are inserted into the positioning pin holes 17 of the upper die 1 and the lower die 2, the upper die 1 and the lower die 2 can be prevented from being horizontally displaced.

In the present embodiment, as shown in fig. 1 to 8, both the upper die 1 and the lower die 2 are rectangular bodies.

In this embodiment, as shown in fig. 1 to 8, the side walls of the upper die 1 and the lower die 2 are provided with anti-slip grooves 18 for facilitating separation, and the upper die 1 and the lower die 2 can be conveniently separated through the anti-slip grooves 18.

Referring to fig. 7 and 8, since there are two different types of metal pipes 25, for this reason, in the present embodiment, as shown in fig. 1 to 8, the punch 20 is also divided into two types. Referring to fig. 7, the metal pipe 25 of type i, the punch 20 is the punch 20 of type i as shown in fig. 6, the end of the punch 20 is provided with an impact groove, the impact groove comprises a large-diameter cylindrical section 21 and a small-diameter cylindrical section 22, the large-diameter cylindrical section 21 is arranged outside, the small-diameter cylindrical section 22 is arranged inside, the diameter of the small-diameter cylindrical section 22 is matched with the diameter of the head end of the joint section of the metal pipe 25 for positioning, the diameter of the large-diameter cylindrical section 21 is larger than that of the head end of the joint section of the metal pipe 25 and can accommodate the head end of the joint section which expands radially, and the diameter of the large-diameter cylindrical section 21 is set according to the designed diameter of the first pier 26.

In this example, refer to a type ii metal tube 25 of fig. 7. The punch 20 adopts a punch 20 of type II as shown in fig. 8, an impact groove is arranged at the end part of the punch 20, the impact groove comprises a cylindrical section 23 and a circular truncated cone section 24, the small diameter end of the circular truncated cone section 24 is arranged inside, the large diameter end of the circular truncated cone section 24 is arranged outside and connected with the cylindrical section 23, the small diameter end of the circular truncated cone section 24 is matched with the diameter of the metal pipe 25, the diameter of the cylindrical section 23 is matched with the designed diameter of the first pier head 26, and the cylindrical section 23 can accommodate the head end of the radially expanded joint section.

The principle and the implementation mode of the utility model are explained by applying a specific embodiment, and the explanation of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a two mound heads of pipe fitting connect shaping to use cold-heading mould, a serial communication port, including mould body and die block, be equipped with the positioning hole who is used for hooping the main part section of tubular metal resonator on the mould body, the end of mould body be equipped with the tank bottom with the joint shaping groove of positioning hole intercommunication, it supplies to connect the shaping inslot be equipped with the confession the die block is followed positioning hole's axially sliding's guide member, be equipped with on the die block and be used for hooping the guide hole at the joint section middle part of tubular metal resonator, the die block with it can make both have gapped elastic support component to be equipped with between the tank bottom in joint shaping groove, the clearance allows to receive axial impact the tail end of joint section is at its inside radial expansion, the die block is equipped with towards the one side of drift and is used for holding because of receiving axial impact the radial expansion the compression district of the head end of joint section, the die block orientation the one side of positioning hole is equipped with the atress can extrude radial expansion the extrusion district of the tail end of joint section.

2. The cold heading die for forming the double-pier-head joint of the pipe fitting according to claim 1, wherein the guide member comprises a guide screw, the guide screw comprises a polished rod section and a threaded section which is in threaded connection with the bottom of the joint forming groove, and an anti-drop screw cap is arranged at one end, far away from the threaded section, of the polished rod section; the pressing block is provided with a surrounding sliding through hole around the pressed area, the sliding through hole comprises a circular hole section and a hole expanding section, the circular hole section is connected with the polished rod section in a sliding mode, the hole expanding section is used for containing the anti-falling screw cap, and the diameter of the anti-falling screw cap is larger than that of the circular hole section.

3. The cold-heading die for forming the double-pier-head joint of the pipe fitting according to claim 2, wherein the elastic supporting member comprises a return compression spring sleeved on the polished rod section, and the sliding through hole further comprises an accommodating section for accommodating the return compression spring.

4. The cold-heading die for forming the double-pier-head joint of the pipe fitting according to any one of claims 1 to 3, wherein the die body comprises an upper die and a lower die, and positioning grooves for forming positioning through holes and joint grooves for forming joint forming grooves are correspondingly formed in the upper die and the lower die; the pressing block comprises an upper pressing block and a lower pressing block, and guide grooves for forming guide through holes are correspondingly formed in the upper pressing block and the lower pressing block.

5. The cold-heading die for forming the double-pier-head joint of the pipe fitting as claimed in claim 4, wherein the upper pressing block and the lower pressing block are provided with anti-falling grooves which are convenient for fingers to hold.

6. The cold-heading die for forming the double-pier-head joint of the pipe fitting according to claim 5, wherein the upper die and the lower die are correspondingly provided with positioning pin holes.

7. The cold-heading die for forming the double-pier-head joint of the pipe fitting according to claim 6, wherein the upper die and the lower die are rectangular bodies.

8. The cold heading die for forming the double-pier-head joint of the pipe fitting according to claim 7, wherein anti-slip grooves convenient to separate are formed in the side walls of the upper die and the lower die.

9. The cold-heading die for forming the double-pier-head joint of the pipe fittings as claimed in claim 1, wherein the end of the punch is provided with an impact groove, and the impact groove comprises a large-diameter cylindrical section capable of accommodating the head end of the radially expanded joint section and a small-diameter cylindrical section with a diameter matched with the diameter of the head end of the unexpanded joint section.

10. The cold heading die for forming the double-pier-head joint of the pipe fitting according to claim 1, wherein the end of the punch is provided with an impact groove, the impact groove comprises a circular truncated cone section and a cylindrical section capable of accommodating the head end of the joint section which expands radially, the large-diameter end of the circular truncated cone section is connected with the cylindrical section, and the cylindrical section and the circular truncated cone section are sequentially arranged from outside to inside along the axial direction of the impact groove.