CN114769498B - Oil pipe joint and production process for same - Google Patents
Oil pipe joint and production process for same Download PDFInfo
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- CN114769498B CN114769498B CN202210438811.4A CN202210438811A CN114769498B CN 114769498 B CN114769498 B CN 114769498B CN 202210438811 A CN202210438811 A CN 202210438811A CN 114769498 B CN114769498 B CN 114769498B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
- B21K1/16—Making machine elements fittings parts of pipe or hose couplings
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The application relates to an oil pipe joint and a production process for the oil pipe joint, wherein a cold header is used for carrying out the following processing steps S1, and one end of an original blank is subjected to cold header shaping to form a chamfer; s2, cold heading the non-chamfer end of the blank into a first inner hole; s3, continuously cold-upsetting the first inner hole of the blank along the axial direction of the first inner hole to form a second inner hole, and cold-upsetting the chamfer end of the blank to form a third inner hole; s4, continuously carrying out cold heading on the third inner hole of the blank along the axial direction of the third inner hole until the third inner hole is communicated with the second inner hole to form a channel; s5, cold upsetting the blank to form a first section and a second section which are coaxially connected, and the first section and the second section are in transition through chamfering to form a fifth semi-finished blank; s6, cold heading and shaping the fifth semi-finished blank into a small-diameter section, a medium-diameter section and a large-diameter section which are coaxially connected to form an oil pipe joint. The whole oil pipe joint is stretched again by the through hole, so that the connection point among the small-diameter section, the medium-diameter section and the large-diameter section is not easy to be unstable, and the yield is improved.
Description
Technical Field
The application relates to the field of hardware spare and accessory parts, in particular to an oil pipe joint and a production process for the oil pipe joint.
Background
The cold heading is a forging method for upsetting and forming a metal bar by using a die at normal temperature. The heads commonly used for manufacturing screws, bolts, rivets, etc. are also used in the related art to machine hardware such as tubing joints.
In processing the tubing joint 4 as in fig. 1, referring to fig. 2, the steps are as follows: 1. obtaining a blank; 2. cold upsetting the blank material through a cold upsetting process to deform the blank material so as to form a small-diameter section 1 and a large-diameter section 3; 3. carrying out cold heading on the blank material through a cold heading process for two times to deform the blank material so as to form a small-diameter section 1, a medium-diameter section 2 and a large-diameter section 3; 4. cold heading the blank material through a cold heading process, so that a small-diameter section 1 of the blank material forms a first inner hole 42; 5. cold heading the blank material by a cold heading process, so that a large-diameter section 3 of the blank material forms a second inner hole 43; 6. the blank is cold headed by a cold heading process, so that the first inner hole 42 and the second inner hole 43 on the blank are combined to form a channel 45.
In the actual machining process, when the holes are closed, instability of the connecting points of the small-diameter section and the middle-diameter section and the connecting points of the middle-diameter section and the large-diameter section is caused, unqualified products are easy to generate, and the yield is low.
Disclosure of Invention
In order to improve the yield of the product,
on one hand, the production process for the oil pipe joint adopts the following technical scheme:
a production process for an oil pipe joint uses a cold header to carry out the following processing steps
S1, cold heading and shaping one end of an original blank to form a chamfer to form a first semi-finished blank;
s2, cold heading the non-chamfer end of the first semi-finished blank into a first inner hole to form a second semi-finished blank;
s3, continuously carrying out cold heading on the first inner hole of the second semi-finished blank along the axial direction of the first inner hole to form a second inner hole, and simultaneously carrying out cold heading on the chamfer end of the second semi-finished blank to form a third inner hole to form a third semi-finished blank;
s4, continuously carrying out cold heading on a third inner hole of the third semi-finished blank along the axial direction of the third inner hole until the third inner hole is communicated with the second inner hole to form a channel, so as to form a fourth semi-finished blank;
s5, cold heading and shaping the fourth semi-finished blank into a first section and a second section which are coaxially connected, wherein the diameter of the first section is larger than that of the second section, the diameter of the first section is smaller than or equal to that of the third semi-finished blank, the first section and the second section are in transition through a chamfer, and the length of a channel is prolonged under the condition that the diameter is unchanged, so that a fifth semi-finished blank is formed;
s6, cold heading and shaping the fifth semi-finished blank into a small-diameter section, a medium-diameter section and a large-diameter section which are coaxially connected, wherein the large-diameter section and the medium-diameter section are formed by shaping the first section, and an oil pipe joint is formed.
Through adopting above-mentioned technical scheme, whole oil pipe joint is through-hole earlier and stretches again for the tie point between minor diameter section, mid-diameter section and the major diameter section is difficult for appearing unstable, thereby has improved the yields. And meanwhile, the outer surface of the oil pipe joint is shaped finally, so that the precision of the outer surface of the oil pipe joint after cold heading is finished is higher, and the follow-up finish machining of the oil pipe joint is facilitated.
Optionally, the cold header includes the fifth cold header mould that is used for realizing step S5, the fifth cold header mould includes fifth die block unit and fifth die unit, set up the fifth shaping groove on the fifth die block unit, the fifth die unit includes the fifth upper die base, installs on the fifth upper die base be used for pushing the fifth semi-manufactured goods blank into the fifth outer die of fifth shaping groove, coaxial sliding connection in the fifth outer die in guided die, fifth drive assembly, guided die in the fifth is used for inserting in the passageway.
Through adopting above-mentioned technical scheme, during the cold heading, in the fourth semi-manufactured goods blank can be inserted earlier to the guide die in the fifth to make the better completion centering of fourth semi-manufactured goods blank before the cold heading, even make the concentricity between passageway and the fifth shaping groove of fourth semi-manufactured goods blank better, make the product everywhere wall thickness of processing out more accord with anticipated setting, reduce the problem such as product outer wall fracture that leads to because eccentric processing, improved the yields. Meanwhile, the fifth inner guide die can also play a role in stabilizing the channel, so that the diameter of the channel can be kept stable in the cold heading process, the problem that the diameter of the channel changes due to excessive deformation of the inner wall of the channel caused by the extrusion force received by the outer surface of the blank is solved, and the product quality is improved.
Optionally, the fifth forming groove comprises a first forming section for the corresponding first section and a second forming section for the corresponding second section, and the length of the first forming section is greater than or equal to that of the fourth semi-finished blank.
By adopting the technical scheme, the fourth semi-finished blank can be pushed into the first forming section completely and then starts to deform, so that the probability that the fourth semi-finished blank overflows out of the fifth forming groove in the cold heading shaping process is reduced, the fourth semi-finished blank in the cold heading process is completely positioned in the fifth forming groove, the temperatures of all the parts are kept similar as far as possible, the probability that shaping is not in place, cracking and foaming is reduced, and the fifth semi-finished blank has better yield.
Optionally, the second molding section communicates the fifth die block unit deviates from fifth die block unit one end, sliding connection has first back shaft in the second molding section, first back shaft one end fixedly connected with first connecting seat, be equipped with first elastic component between first connecting seat and the fifth die block unit, first elastic component is used for driving first back shaft to move to the position that first back shaft terminal surface and fifth die block unit towards fifth die block unit one end terminal surface flush.
By adopting the technical scheme, the fourth semi-finished blank can be supported by the first supporting shaft in the whole processing process of the step S5, so that the fourth semi-finished blank can move towards the bottom of the fifth forming groove more stably. And the first supporting shaft is always limited in the shaping process of the fourth semi-finished blank, so that the fourth semi-finished blank can slowly overflow the whole space of the fifth shaping groove, and the shaping precision of the fourth semi-finished blank is improved.
Optionally, in step S4, a flare is formed at one end of the channel.
By adopting the technical scheme, the fifth inner guide die can be inserted into the channel more stably and smoothly.
Optionally, step S5 includes the steps of,
s5.1, driving the fifth upper die holder and the fifth inner guide die to synchronously move downwards through a fifth driving assembly until the fifth inner guide die completely passes through the channel;
s5.2, the fifth driving assembly continuously drives the fifth upper die holder and the fifth inner guide die to synchronously move downwards until the fourth semi-finished blank completely enters the first forming section, and at the moment, the first supporting shaft is pushed to one end, close to the second forming section, of the first forming section by the fifth inner guide die;
s5.3, setting the length of the first section as a, the length of the second section as b, and the length of the fourth semi-finished blank as c, wherein the fifth driving assembly drives the fifth upper die holder and the fifth inner guide die to move at a differential speed, so that when the fifth upper die holder moves towards the fifth bottom die unit by c-a, the fifth inner guide die moves towards the fifth bottom die unit by a+b-c.
By adopting the technical scheme, the processing precision of the product is further improved, and the fifth semi-finished blank formed by shaping has higher yield.
Optionally, a first caulking groove for inserting a fifth inner guide die is formed in the upper end of the first supporting shaft; in step S5.1, the fifth inner guide die moves downward to a position where one end of the fifth inner guide die is inserted into the first caulking groove and abuts against the inner wall of the first caulking groove.
By adopting the technical scheme, the coaxial confirmation of the fifth inner guide die and the first supporting shaft is better completed, so that the fourth semi-finished blank, the fifth inner guide die and the fifth forming groove have better concentricity, and the processed product has higher precision.
Optionally, a ventilation flow channel is formed in the first support shaft, one end of the ventilation flow channel is communicated with the first connecting seat, and the other end of the ventilation flow channel is communicated with the outer wall of the first support shaft; when the first support shaft is positioned at the step S5.1, the ventilation flow channel is communicated with the first section, and when the first support shaft is positioned at the step S5.2, one end of the ventilation flow channel is closed by the side wall of the second section.
Through adopting above-mentioned technical scheme, accessible ventilation flow channel is bloied towards the fifth shaping inslot wall after the cold heading is accomplished at every turn, reduces owing to the cold heading and detains the impurity in the fifth shaping inslot to improve subsequent machining precision.
Optionally, the ventilation runner includes sprue and a plurality of auxiliary runner, the sprue sets up and one end intercommunication first connecting seat along first back shaft axial, the auxiliary runner is equipped with a plurality of along first back shaft circumference, auxiliary runner one end intercommunication sprue and one end intercommunication first back shaft outer wall, the auxiliary runner is the slope setting, just auxiliary runner intercommunication sprue one end is located auxiliary runner intercommunication first back shaft outer wall one end and is close to first connecting seat one side.
By adopting the technical scheme, the fifth forming groove can be better blown by the air flow coming out of the ventilation flow channel everywhere, and impurities remained in the fifth forming groove are reduced.
On the other hand, the oil pipe joint provided by the application adopts the following technical scheme:
an oil pipe joint is manufactured by using a production process for the oil pipe joint, and the length ratio of a small-diameter section to a large-diameter section is 0.35-0.8.
By adopting the technical scheme, the probability of cracking of the product caused by overlarge deformation required by single cold heading is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the processing precision of the product is improved;
2. the yield and the quality of the product are improved;
3. the processing technique is optimized.
Drawings
Fig. 1 is a schematic view of a structure of an oil pipe joint in the related art.
Fig. 2 is a schematic view of a processing process of an oil pipe joint in the related art.
Fig. 3 is a schematic structural diagram of embodiment 1.
Fig. 4 is a schematic representation of the variation of the blank with each processing step in example 2.
Fig. 5 is a schematic structural view of a fifth cold heading die in embodiment 3.
Fig. 6 is a schematic diagram of the use of the fifth cold heading die in example 3.
Fig. 7 is a schematic structural view of a sixth cold heading die in embodiment 3.
Fig. 8 is a schematic diagram of the use of a sixth cold heading die in example 3.
Reference numerals illustrate: 1. a small diameter section; 2. a medium diameter section; 3. a large diameter section; 4. an oil pipe joint; 5. a first semi-finished blank; 6. a second semi-finished blank; 7. a third semi-finished blank; 8. a fourth semi-finished blank; 9. a first section; 10. a second section; 11. a fifth semi-finished blank; 12. a fifth bottom die unit; 13. a fifth die unit; 14. a fifth molding groove; 15. a first forming section; 16. a second molding section; 17. a first support shaft; 18. a first connection base; 19. a first elastic member; 20. a fifth upper die holder; 21. a fifth outer die; 22. a fifth inner guide die; 23. a first caulking groove; 24. a ventilation flow passage; 25. a main flow passage; 26. a secondary flow passage; 27. a fifth cold heading die; 28. a sixth cold heading die; 29. a sixth bottom die unit; 30. a sixth die unit; 31. a sixth forming tank; 32. a third forming section; 33. a fourth forming section; 34. a fifth molding section; 35. a second support shaft; 36. a second connecting seat; 37. a second elastic member; 38. a sixth upper die holder; 39. a sixth outer die; 40. a sixth inner guide die; 41. a second caulking groove; 42. a first bore; 43. a second bore; 44. a third bore; 45. a channel.
Detailed Description
The present application is described in further detail below in conjunction with figures 3-8.
Example 1
Example 2
s1, cold heading and shaping one end of an original blank to form a chamfer to form a first semi-finished blank 5;
s2, cold heading the non-chamfer end of the first semi-finished blank 5 into a first inner hole 42 to form a second semi-finished blank 6;
s3, continuously cold-upsetting the first inner hole 42 of the second semi-finished blank 6 along the axial direction of the first inner hole 42 to form a second inner hole 43, and cold-upsetting the chamfer end of the second semi-finished blank 6 to form a third inner hole 44 to form a third semi-finished blank 7;
s4, continuously carrying out cold heading on the third inner hole 44 of the third semi-finished blank 7 along the axial direction of the third inner hole 44 until the third inner hole 44 is communicated with the second inner hole 43 to form a channel 45, forming a flaring at one end of the channel 45, and finally forming a fourth semi-finished blank 8;
s5, cold heading and shaping the fourth semi-finished blank 8 into a first section 9 and a second section 10 which are coaxially connected, wherein the diameter of the first section 9 is larger than that of the second section 10, the diameter of the first section 9 is smaller than or equal to that of the third semi-finished blank 7, the first section 9 and the second section 10 are in chamfer transition, and the length of a channel 45 is prolonged under the condition that the diameter is unchanged, so that a fifth semi-finished blank 11 is formed;
s6, cold heading and shaping the fifth semi-finished blank 11 into a small-diameter section 1, a middle-diameter section 2 and a large-diameter section 3 which are coaxially connected, wherein the large-diameter section 3 and the middle-diameter section 2 are formed by shaping the first section 9, and an oil pipe joint 4 is formed.
Example 3
Referring to fig. 5, the fifth cold heading die 27 includes a fifth die block unit 12 and a fifth die unit 13. The fifth die block unit 12 is provided with a fifth molding groove 14. The fifth forming slot 14 comprises a first forming section 15 for the corresponding first section 9 and a second forming section 16 for the corresponding second section 10, the first forming section 15 having a length greater than or equal to the fourth semi-finished blank 8. The second molding section 16 communicates with the end of the fifth die unit 12 facing away from the fifth die unit 13. The second molding section 16 is slidably connected with a first supporting shaft 17, one end of the first supporting shaft 17 penetrating out of the second molding section 16 is fixedly connected with a first connecting seat 18, and a first elastic piece 19 is arranged between the first connecting seat 18 and the fifth bottom die unit 12. The first elastic member 19 is a spring, and two ends of the first elastic member 19 are fixedly connected to the first connecting seat 18 and the fifth bottom die unit 12 respectively. The first elastic member 19 is configured to urge the first support shaft 17 toward the fifth die unit 13 until the end surface of the first support shaft 17 is flush with the end surface of the fifth die unit 12 toward the fifth die unit 13.
Referring to fig. 5, the fifth die unit 13 includes a fifth upper die holder 20, a fifth outer die 21 mounted on the fifth upper die holder 20, a fifth inner guide die 22 coaxially slidably coupled within the fifth outer die 21, and a fifth driving assembly. The fifth upper die holder 20 is used to push the fourth semifinished blank 8 into the fifth forming slot 14. The fifth inner guide die 22 is for insertion into the channel 45. The upper end of the first supporting shaft 17 is coaxially provided with a first caulking groove 23 for inserting the fifth inner guide die 22.
The fifth drive assembly is used to drive the fifth inner die 22 and the fifth outer die 21 in respective axial directions. The fifth drive assembly comprises two electric cylinders, one for each of the fifth inner die 22 and the fifth outer die 21. The fifth inner die 22 and the fifth outer die 21 are driven to move in the axial direction thereof, respectively, by the electric cylinders. The fifth drive assembly is not shown in the figures.
Referring to fig. 5, in order to improve the quality of the product, a ventilation flow passage 24 is formed in the first support shaft 17. The ventilation flow passage 24 includes a main flow passage 25 and a plurality of auxiliary flow passages 26, and the main flow passage 25 is axially arranged along the first support shaft 17 and has one end communicating with the first connection seat 18. One end of the main flow channel 25, which is communicated with the first connecting seat 18, is connected with an air supply source, which may be an air pump or the like, and is not shown in the figure. The auxiliary flow channels 26 are circumferentially arranged along the first supporting shaft 17, one ends of the auxiliary flow channels 26 are communicated with the main flow channel 25, and one ends of the auxiliary flow channels are communicated with the outer wall of the first supporting shaft 17. The auxiliary flow channel 26 is obliquely arranged, and one end of the auxiliary flow channel 26, which is communicated with the main flow channel 25, is positioned at one side, close to the first connecting seat 18, of one end, which is communicated with the outer wall of the first supporting shaft 17, of the auxiliary flow channel 26.
Referring to fig. 5 and 6, when the fifth cold heading die 27 is used in step S5, the following steps are used:
s5.1, placing the fourth semi-finished blank 8 on the first supporting shaft 17, and driving the fifth upper die holder 20 and the fifth inner guide die 22 to synchronously move downwards through the fifth driving assembly until the fifth inner guide die 22 completely passes through the channel 45 and is inserted into the first caulking groove 23, so that the fourth semi-finished blank 8, the fifth inner guide die 22 and the first supporting shaft 17 are all in a coaxial state; at this time, the ventilation flow path 24 communicates with the first molding section 15;
s5.2, the fifth driving assembly continues to drive the fifth upper die holder 20 and the fifth inner guide die 22 to synchronously move downwards until the fourth semi-finished blank 8 completely enters the first forming section 15, and at the moment, the first supporting shaft 17 is pushed to one end, close to the second forming section 16, of the first forming section 15 by the fifth inner guide die 22; at this time, one end of the ventilation channel 24 is closed by the side wall of the second section 10.
S5.3, the length of the first section 9 is set to be a, the length of the second section 10 is set to be b, the length of the fourth semi-finished blank 8 is set to be c, and the fifth driving assembly drives the fifth upper die holder 20 and the fifth inner guide die 22 to move in a differential mode, so that when the fifth upper die holder 20 moves towards the fifth bottom die unit 12 for c-a, the fifth inner guide die 22 moves towards the fifth bottom die unit 12 for a+b-c, and the shaping of the fourth semi-finished blank 8 is completed, so that a fifth semi-finished blank 11 is formed.
S5.4, the fifth driving assembly drives the fifth inner guide die 22 to move towards the fifth upper die holder 20 until the fifth inner guide die 22 leaves the channel 45, and then the fifth driving assembly drives the fifth upper die holder 20 to leave the fifth bottom die unit 12, so that the fifth outer die 21 leaves the fifth semi-finished blank 11, and the fifth semi-finished blank 11 is pushed away from the fifth forming groove 14 by the first supporting shaft 17; at this time, the ventilation flow channel 24 communicates with the first section 9, and the ventilation flow channel 24 blows air toward the wall of the fifth forming groove 14, so that impurities retained in the fifth forming groove 14 due to cold heading are reduced, and the subsequent processing accuracy is improved.
Referring to fig. 7, the sixth cold heading die 28 includes a sixth die unit 29 and a sixth die unit 30. The sixth die block unit 29 is provided with a sixth molding groove 31. The sixth forming groove 31 comprises a third forming section 32 for the large diameter section 3, a fourth forming section 33 for the medium diameter section 2, a fifth forming section 34 for the small diameter section 1, the third forming section 32 having a length greater than or equal to the length of the first section 9 of the fifth semi-finished blank 11. The fifth forming section 34 communicates with the end of the sixth die unit 29 facing away from the sixth die unit 30. The fifth molding section 34 is slidably connected with a second supporting shaft 35, one end of the second supporting shaft 35 penetrating through the fifth molding section 34 is fixedly connected with a second connecting seat 36, and a second elastic piece 37 is arranged between the second connecting seat 36 and the sixth bottom die unit 29. The second elastic member 37 is a spring, and two ends of the second elastic member 37 are fixedly connected to the second connecting seat 36 and the sixth bottom die unit 29 respectively. The second elastic member 37 is configured to urge the second support shaft 35 toward the sixth die unit 30 until the end surface of the second support shaft 35 is flush with the end surface of the sixth die unit 29 toward the sixth die unit 30.
Referring to fig. 7, the sixth die unit 30 includes a sixth upper die holder 38, a sixth outer die 39 mounted on the sixth upper die holder 38, a sixth inner guide die 40 coaxially slidably coupled within the sixth outer die 39, and a sixth drive assembly. The sixth upper die holder 38 is used to push the fifth semi-finished blank 11 into the sixth forming slot 31. The sixth inner guide die 40 is for insertion into the channel 45. The upper end of the second supporting shaft 35 is coaxially provided with a second caulking groove 41 for inserting the sixth inner guide die 40.
Referring to fig. 7, a sixth drive assembly is provided for driving the sixth inner die 40 and the sixth outer die 39 in respective axial directions. The sixth drive assembly includes two electric cylinders, one for each of the sixth inner die 40 and the sixth outer die 39. The sixth inner die 40 and the sixth outer die 39 are driven by the electric cylinders to move in the axial directions thereof, respectively. The sixth drive assembly is not shown in the figures.
Referring to fig. 7 and 8, when the sixth cold heading die 28 is used in step S6, the following steps are used:
s6.1, placing the fifth semi-finished blank 11 on the second supporting shaft 35, and driving the sixth upper die holder 38 and the sixth inner guide die 40 to synchronously move downwards through the sixth driving assembly until the sixth inner guide die 40 completely passes through the channel 45 and is inserted into the second caulking groove 41, so that the fifth semi-finished blank 11, the sixth inner guide die 40 and the second supporting shaft 35 are all in a coaxial state;
s6.2, the sixth driving assembly continues to drive the sixth upper die holder 38 and the sixth inner guide die 40 to synchronously move downwards until the fifth semi-finished blank 11 completely enters the sixth forming groove 31, and at the moment, the second supporting shaft 35 is pushed into the fifth forming section 34 by the sixth inner guide die 40.
S6.3, the length of the large-diameter section 3 is d, the length of the middle-diameter section 2 is e, the length of the first section 9 is a, and the sixth driving assembly drives the sixth upper die holder 38 and the sixth inner guide die 40 to move in a differential mode, so that when the sixth upper die holder 38 moves towards the sixth bottom die unit 29 by a-d, the sixth inner guide die 40 moves towards the sixth bottom die unit 29 by d+e-a, and the shaping of the fifth semi-finished blank 11 is completed, and the oil pipe joint 4 is formed.
S6.4, the sixth driving assembly drives the sixth inner guide die 40 towards the sixth upper die holder 38 until the sixth inner guide die 40 leaves the channel 45, and then the sixth driving assembly drives the sixth upper die holder 38 away from the sixth bottom die unit 29 such that the sixth outer die 39 leaves the tubing joint 4, and the tubing joint 4 is pushed away from the sixth forming groove 31 by the second support shaft 35.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (4)
1. The production process for the oil pipe joint is characterized by comprising the following steps of: the following processing steps are carried out by using a cold header
S1, cold heading and shaping one end of an original blank to form a chamfer to form a first semi-finished blank (5);
s2, cold heading the non-chamfer end of the first semi-finished blank (5) into a first inner hole (42) to form a second semi-finished blank (6);
s3, continuously cold-heading the first inner hole (42) of the second semi-finished blank (6) along the axial direction of the first inner hole (42) to form a second inner hole (43), and cold-heading the chamfer end of the second semi-finished blank (6) to form a third inner hole (44) to form a third semi-finished blank (7);
s4, continuously cold heading a third inner hole (44) of the third semi-finished blank (7) along the axial direction of the third inner hole (44) until the third inner hole (44) is communicated with the second inner hole (43) to form a channel (45) so as to form a fourth semi-finished blank (8);
s5, cold heading and shaping the fourth semi-finished blank (8) into a first section (9) and a second section (10) which are coaxially connected, wherein the diameter of the first section (9) is larger than that of the second section (10), the diameter of the first section (9) is smaller than or equal to that of the third semi-finished blank (7), the first section (9) and the second section (10) are transited through chamfering, and the length of a channel (45) is prolonged under the condition that the diameter is unchanged, so that a fifth semi-finished blank (11) is formed;
s6, cold heading and shaping a fifth semi-finished blank (11) into a small-diameter section (1), a middle-diameter section (2) and a large-diameter section (3) which are coaxially connected, wherein the large-diameter section (3) and the middle-diameter section (2) are formed by shaping a first section (9) to form an oil pipe joint (4);
the cold header comprises a fifth cold header die (27) for realizing the step S5, the fifth cold header die (27) comprises a fifth bottom die unit (12) and a fifth die unit (13), a fifth forming groove (14) is formed in the fifth bottom die unit (12), the fifth die unit (13) comprises a fifth upper die holder (20), a fifth outer die (21) arranged on the fifth upper die holder (20) and used for pushing a fourth semi-finished blank (8) into the fifth forming groove (14), a fifth inner guide die (22) coaxially and slidably connected into the fifth outer die (21), and a fifth driving assembly, and the fifth inner guide die (22) is used for being inserted into the channel (45);
the fifth forming groove (14) comprises a first forming section (15) for the corresponding first section (9) and a second forming section (16) for the corresponding second section (10), the first forming section (15) having a length greater than or equal to the fourth semi-finished blank (8);
the second molding section (16) is communicated with one end of the fifth die block unit (12) deviating from the fifth die block unit (13), a first supporting shaft (17) is connected in a sliding manner in the second molding section (16), one end of the first supporting shaft (17) is fixedly connected with a first connecting seat (18), a first elastic piece (19) is arranged between the first connecting seat (18) and the fifth die block unit (12), and the first elastic piece (19) is used for driving the first supporting shaft (17) to move to a position where the end face of the first supporting shaft (17) is flush with the end face of the fifth die block unit (12) facing the end face of the fifth die block unit (13);
step S5 comprises the steps of:
s5.1, driving the fifth upper die holder (20) and the fifth inner guide die (22) to synchronously move downwards through the fifth driving assembly until the fifth inner guide die (22) completely penetrates through the channel (45);
s5.2, the fifth driving assembly continuously drives the fifth upper die holder (20) and the fifth inner guide die (22) to synchronously move downwards until the fourth semi-finished blank (8) completely enters the first forming section (15), and at the moment, the first supporting shaft (17) is pushed to one end, close to the second forming section (16), of the first forming section (15) by the fifth inner guide die (22);
s5.3, setting the length of the first section (9) as a, the length of the second section (10) as b, and the length of the fourth semi-finished blank (8) as c, wherein the fifth driving assembly drives the fifth upper die holder (20) and the fifth inner guide die (22) to move in a differential mode, so that when the fifth upper die holder (20) moves towards the fifth bottom die unit (12) for c-a, the fifth inner guide die (22) moves towards the fifth bottom die unit (12) for a+b-c;
a ventilation flow passage (24) is formed in the first support shaft (17), one end of the ventilation flow passage (24) is communicated with the first connecting seat (18), and the other end of the ventilation flow passage is communicated with the outer wall of the first support shaft (17); when the first support shaft (17) is positioned at the step S5.1, the ventilation flow channel (24) is communicated with the first section (9), and when the first support shaft (17) is positioned at the step S5.2, one end of the ventilation flow channel (24) is closed by the side wall of the second section (10);
the ventilation runner (24) comprises a main runner (25) and a plurality of auxiliary runners (26), the main runner (25) is axially arranged along the first supporting shaft (17) and is communicated with the first connecting seat (18) at one end, the auxiliary runners (26) are circumferentially arranged along the first supporting shaft (17), one end of each auxiliary runner (26) is communicated with the main runner (25) and one end of each auxiliary runner is communicated with the outer wall of the first supporting shaft (17), the auxiliary runners (26) are obliquely arranged, and one end of each auxiliary runner (26) is communicated with the main runner (25) and is located at one end of the auxiliary runner (26) which is communicated with the outer wall of the first supporting shaft (17) and is close to one side of the first connecting seat (18).
2. A process for producing an oil pipe joint according to claim 1, wherein: in step S4, a flare is formed at one end of the channel (45).
3. A process for producing an oil pipe joint according to claim 1, wherein: the upper end of the first support shaft (17) is provided with a first caulking groove (23) for inserting a fifth inner guide die (22); in step S5.1, the fifth inner guide die (22) moves downward to a position where one end of the fifth inner guide die (22) is inserted into the first caulking groove (23) and abuts against the inner wall of the first caulking groove (23).
4. An oil pipe joint, characterized in that: manufactured by using the production process for the oil pipe joint according to claim 1, wherein the ratio of the length of the small diameter section (1) to the length of the large diameter section (3) is 0.35-0.8.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3322037A (en) * | 1964-05-25 | 1967-05-30 | Torrington Mfg Co | Chip exhaust system |
| US4049762A (en) * | 1973-08-03 | 1977-09-20 | Harsco Corporation | Method of forming a pipe coupling |
| JP2016132011A (en) * | 2015-01-20 | 2016-07-25 | インター精工株式会社 | Forming device of metal pipe and forming method of metal pipe |
| CN207592353U (en) * | 2017-09-19 | 2018-07-10 | 上海方驰新材料科技有限公司 | A kind of mold cleaning device of drifting dust formula |
| CN208895095U (en) * | 2018-08-22 | 2019-05-24 | 湖南中航紧固系统有限公司 | Oil pipe bolt cold-heading molding mould |
| CN210908131U (en) * | 2019-10-30 | 2020-07-03 | 汇专机床有限公司 | Processing machine tool, processing main shaft and air flue structure thereof |
| CN211071645U (en) * | 2019-04-30 | 2020-07-24 | 上海上标汽车紧固件有限公司 | Cold heading forming die assembly for passenger car engine oil delivery pipe bolt |
| CN212945208U (en) * | 2020-03-17 | 2021-04-13 | 昆山麦克司博精密机械有限公司 | Forming die group of flange special-shaped hole bushing |
| CN214920166U (en) * | 2021-04-19 | 2021-11-30 | 富奥汽车零部件股份有限公司 | Cold heading die |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB681461A (en) * | 1949-12-07 | 1952-10-22 | Joseph Braems | Method and means for cold heading of bolts, screws, rivets and similar parts |
| US4362043A (en) * | 1975-09-17 | 1982-12-07 | Hanson Thomas A | Pipe unions |
| JPH05104191A (en) * | 1991-10-15 | 1993-04-27 | Suzuhide Kogyo Kk | Cold forging method for shaft body with flange |
| JP4110677B2 (en) * | 1999-07-12 | 2008-07-02 | 大同特殊鋼株式会社 | Upset forging equipment |
| JP4640078B2 (en) * | 2005-09-28 | 2011-03-02 | 豊田合成株式会社 | Processing device for fluid pipe connection fitting and manufacturing method of fluid pipe connection fitting |
| CN102069348B (en) * | 2010-11-19 | 2015-04-22 | 宁波行一汽车零部件有限公司 | Method for manufacturing hose connector core |
| CN204220907U (en) * | 2014-05-08 | 2015-03-25 | 深圳航空标准件有限公司 | The cold upsetting die of car of the static iron core of auto loud hailer |
| CN106670367A (en) * | 2017-02-21 | 2017-05-17 | 苏州孚莱博精密金属科技有限公司 | Cold heading die set for manufacturing oil pipe joint and cold heading process |
| CN207839972U (en) * | 2017-11-10 | 2018-09-11 | 宾科汽车紧固件（昆山）有限公司 | Brake callipers guide pin cold-heading module |
| CN209425717U (en) * | 2018-11-26 | 2019-09-24 | 重庆市永川区致远金属铸造有限公司 | A kind of moulding box with dedusting function |
| CN109500347A (en) * | 2018-12-12 | 2019-03-22 | 宾科汽车紧固件（昆山）有限公司 | Electronic parking adjusting nut cold-heading device and its production technology |
| CN110280704A (en) * | 2019-07-08 | 2019-09-27 | 苏州孚莱博精密金属科技有限公司 | It is a kind of for manufacturing the cold heading die group and cold heading technique of dampener sleeve |
| CN110640076A (en) * | 2019-10-30 | 2020-01-03 | 江苏南方轴承股份有限公司 | Caliper piston multi-station cold heading forging module and cold heading forging forming process |
-
2022
- 2022-04-25 CN CN202210438811.4A patent/CN114769498B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3322037A (en) * | 1964-05-25 | 1967-05-30 | Torrington Mfg Co | Chip exhaust system |
| US4049762A (en) * | 1973-08-03 | 1977-09-20 | Harsco Corporation | Method of forming a pipe coupling |
| JP2016132011A (en) * | 2015-01-20 | 2016-07-25 | インター精工株式会社 | Forming device of metal pipe and forming method of metal pipe |
| CN207592353U (en) * | 2017-09-19 | 2018-07-10 | 上海方驰新材料科技有限公司 | A kind of mold cleaning device of drifting dust formula |
| CN208895095U (en) * | 2018-08-22 | 2019-05-24 | 湖南中航紧固系统有限公司 | Oil pipe bolt cold-heading molding mould |
| CN211071645U (en) * | 2019-04-30 | 2020-07-24 | 上海上标汽车紧固件有限公司 | Cold heading forming die assembly for passenger car engine oil delivery pipe bolt |
| CN210908131U (en) * | 2019-10-30 | 2020-07-03 | 汇专机床有限公司 | Processing machine tool, processing main shaft and air flue structure thereof |
| CN212945208U (en) * | 2020-03-17 | 2021-04-13 | 昆山麦克司博精密机械有限公司 | Forming die group of flange special-shaped hole bushing |
| CN214920166U (en) * | 2021-04-19 | 2021-11-30 | 富奥汽车零部件股份有限公司 | Cold heading die |
Non-Patent Citations (1)
| Title |
|---|
| 柴油机高压油管接头冷镦工艺优化研究;胡广云;王奎;向贤念;王雁冰;;柴油机设计与制造(第02期);第43-46页 * |
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