Cold heading die for shaft gear standard component

Abstract

The utility model relates to the technical field of cold heading dies, in particular to a cold heading die for a shaft gear standard component, which comprises a punching die set and a main die set, the punching die set comprises a first-order punching die, a second-order punching die, a third-order punching die, a fourth-order punching die, a fifth-order punching die and a sixth-order punching die, the main die set comprises a first-sequence main die, a second-sequence main die, a third-sequence main die, a fourth-sequence main die, a fifth-sequence main die and a sixth-sequence main die, the first-sequence stamping die corresponds to the first-sequence main die, the second-sequence stamping die corresponds to the second-sequence main die, the third-sequence stamping die corresponds to the third-sequence main die, and the sixth-sequence stamping die corresponds to the fourth-sequence main die. The fourth-sequence stamping die corresponds to the fourth-sequence main die, the fifth-sequence stamping die corresponds to the fifth-sequence main die, and the sixth-sequence stamping die corresponds to the sixth-sequence main die. The cold heading device has the effect of meeting the cold heading machining standard of the shaft gear standard part.

Description

Technical Field

[0001] The present application relates to the technical field of cold heading dies, and in particular to a cold heading die for shaft gear standard parts. Background Art

[0002] With the continuous improvement of processing speed of cold heading product manufacturing equipment and the continuous improvement of product technical requirements of high-end customers in the fastener industry, the original design and manufacturing accuracy and loss of cold heading molds can no longer meet the current needs of rapid production, rapid mold change and process manufacturing capabilities.

[0003] At present, the cold heading die is usually installed in the cold heading forming machine. The cold heading die includes a punch die and a main die, and the cold heading processing position is set between the punch die and the main die. When standard parts need to be processed, the sheared material is first placed in the cold heading processing position, and then the punch die is driven to extrude in the direction close to the main die. At this time, the sheared material is extruded into the required fastener shape to complete the cold heading process.

[0004] However, in the process of processing and producing shaft gear standard parts, since shaft gear standard parts have strict requirements on hardness and precision, relying on a single set of molds cannot meet the processing standards of shaft gear standard parts. Utility Model Content

[0005] In order to meet the cold heading processing standards of shaft gear standard parts, the present application provides a cold heading die for shaft gear standard parts.

[0006] The present application provides a cold heading die for shaft gear standard parts, which adopts the following technical solution:

[0007] A cold heading die for shaft gear standard parts comprises a die set and a main die set, wherein the die set comprises a first-order die, a second-order die, a third-order die, a fourth-order die, a fifth-order die and a sixth-order die, and the main die set comprises a first-order main die, a second-order main die, a third-order main die, a fourth-order main die, a fifth-order main die and a sixth-order main die, wherein the first-order die is arranged correspondingly to the first-order main die, the second-order die is arranged correspondingly to the second-order main die, the third-order die is arranged correspondingly to the third-order main die, the fourth-order die is arranged correspondingly to the fourth-order main die, the fifth-order die is arranged correspondingly to the fifth-order main die, and the sixth-order die is arranged correspondingly to the sixth-order main die.

[0008] By adopting the above technical scheme, a cold heading die consisting of six punch die sets and six main dies is used to continuously perform cold heading extrusion on the sheared materials, which is beneficial for cold heading extrusion of hard metal sheared materials into the required standard part shape, thereby meeting the cold heading processing standards of shaft gear standard parts.

[0009] Optionally, the first-order punch die includes a first-order upper die, and a first-order upper punch back pad and a first-order upper punch rod are arranged in the first-order upper die;

[0010] The first-order main mold includes a first-order lower mold, a first-order lower punch rod is arranged in the first-order lower mold, a first lower mold sleeve is arranged at one end of the first-order lower mold, a first lower mold T-shaped pad is arranged in the first lower mold sleeve, and a punch of the first-order lower punch rod is provided with a first punch platform.

[0011] By adopting the above technical scheme, the sheared material is clamped on one side of a first-order main die. When the first-order punch die is extruded as a whole in a direction close to the first-order main die, the shape of one end of the sheared material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the first-order upper punch rod and the first-order upper die, and the shape of the other end of the sheared material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the first-order lower punch rod and the first-order lower die, thereby completing the first flattening of the sheared material, which is beneficial to improving the stability of the cold heading processing of hard metal raw material bars.

[0012] Optionally, the second-order punch die includes a second-order upper die, and a second-order upper punch back pad and a second-order upper punch rod are arranged in the second-order upper die;

[0013] The second-order main mold includes a second-order lower mold, a second-order lower punch rod is arranged in the second-order lower mold, a second lower mold sleeve is arranged at one end of the second-order lower mold, a second lower mold T-shaped pad is arranged in the second lower mold sleeve, and the punches of the second-order upper punch rod and the second-order lower punch rod are respectively provided with second punch platforms.

[0014] By adopting the above technical scheme, after the shear material is flattened for the first time, the shear material is turned over and moved to one side of the second-order main die. When the second-order punch die is extruded as a whole in a direction close to the second-order main die, the shape of one end of the shear material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the second-order upper punch rod and the second-order upper die, and the shape of the other end of the shear material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the second-order lower punch rod and the second-order lower die, thereby completing the second flattening of the shear material, making the shear material closer to the specification size of the standard part, and thus helping to improve the stability of the cold heading processing of hard metal raw material bars.

[0015] Optionally, the three-sequence punch die includes a three-sequence upper die, and a three-sequence upper punch back pad and a three-sequence upper punch rod are arranged in the three-sequence upper die;

[0016] The three-sequence main mold includes a three-sequence lower mold, a three-sequence lower punch rod is arranged in the three-sequence lower mold, a third lower mold sleeve is arranged at one end of the three-sequence lower mold, a third lower mold T-shaped pad is arranged in the third lower mold sleeve, and the punch of the three-sequence lower punch rod is provided with a third punch platform.

[0017] By adopting the above technical scheme, after the shear material is flattened for the second time, it is reset, flipped over and moved to one side of the three-sequence main die. When the three-sequence punch die is extruded as a whole in a direction close to the three-sequence main die, the shape of one end of the shear material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the three-sequence upper punch rod and the three-sequence upper die, and the shape of the other end of the shear material after cold heading and extrusion is the same as the shape of the inner cavity enclosed by the three-sequence lower punch rod and the three-sequence lower die, thereby completing the first standard part forming of the shear material, making the shape of the shear material closer to the shape of the standard part, and further facilitating improving the stability of the cold heading processing of hard metal raw material bars.

[0018] Optionally, the four-sequence punch die includes a four-sequence upper die, a four-sequence upper punch back pad and a four-sequence first upper punch rod are arranged in the four-sequence upper die, and a four-sequence second upper punch rod is arranged in the four-sequence first upper punch rod;

[0019] The four-sequence main mold includes a four-sequence lower mold, in which a four-sequence lower punch rod and a fourth lower mold cushion block are arranged, one end of the four-sequence lower mold is provided with a fourth lower mold rear cushion sleeve, and the fourth lower mold sleeve second needle seat and the fourth lower mold third needle seat are arranged in the fourth lower mold rear cushion sleeve, and the punches of the four-sequence first upper punch rod and the four-sequence lower punch rod are respectively fixedly installed with a fourth punch platform.

[0020] By adopting the above technical scheme, after the shearing material completes the first standard part forming, the shearing material is translated to one side of the four-sequence main die. When the four-sequence punch die is extruded as a whole in the direction close to the four-sequence main die, the shape of one end of the shearing material after cold heading extrusion is the same as the shape of the inner cavity enclosed by the four-sequence upper punch rod and the four-sequence upper die, and the shape of the other end of the shearing material after cold heading extrusion is the same as the shape of the inner cavity enclosed by the four-sequence lower punch rod and the four-sequence lower die, thereby completing the second standard part forming of the shearing material and making the shape of the shearing material closer to the shape of the standard part. The second needle seat of the fourth lower die sleeve and the third needle seat of the fourth lower die are beneficial to push the shearing material out through the four-sequence lower punch rod after the cold heading process of the shearing material is completed, thereby helping to improve the stability of the cold heading process of the hard metal raw material bar.

[0021] Optionally, the five-sequence punching die includes a five-sequence upper die, and a five-sequence upper punch rod and a five-sequence upper punch rear pad are arranged in the five-sequence upper die;

[0022] The five-sequence main mold includes a five-sequence lower mold, in which a five-sequence lower punch rod and a five-sequence lower mold pad are arranged, one end of the five-sequence lower mold is provided with a fifth lower mold rear cushion sleeve, and the fifth lower mold sleeve second needle seat and the fifth lower mold third needle seat are arranged in the fifth lower mold rear cushion sleeve, and the punches of the five-sequence upper punch rod and the five-sequence lower punch rod are respectively fixedly installed with the fifth punch platform.

[0023] By adopting the above technical scheme, after the shearing material completes the second standard part forming, the shearing material is flattened on one side of the first to fifth sequence main molds. When the fifth sequence punch die is extruded as a whole in the direction close to the fifth sequence main mold, the shape of one end of the shearing material after cold heading extrusion is the same as the end face shape of the fifth sequence upper punch bar, and the shape of the other end of the shearing material after cold heading extrusion is the same as the shape of the inner cavity enclosed by the fifth sequence lower punch bar and the fifth sequence lower mold, thereby completing the third standard part forming of the shearing material and increasing the depth of the blind hole in the shearing material. The second needle seat of the fifth lower mold sleeve and the third needle seat of the fifth lower mold sleeve are beneficial to push the shearing material out through the fifth sequence lower punch bar after the cold heading process of the shearing material is completed, thereby helping to improve the stability of the cold heading process of the hard metal raw material bar.

[0024] Optionally, the six-sequence punch die includes a six-sequence upper die, and a six-sequence upper punch rod and a six-sequence upper punch back pad are arranged in the six-sequence upper die;

[0025] The six-sequence main mold includes a six-sequence lower mold, in which a sixth lower mold movable punch core, a six-sequence lower punch rod, a sixth lower punch sleeve, a sixth lower mold spring seat, a sixth lower mold sleeve second needle seat and a sixth lower mold third needle seat are arranged in sequence, and the punch of the six-sequence lower punch rod is fixedly installed with a sixth punch platform.

[0026] By adopting the above technical scheme, after the shearing material completes the third standard part forming, the shearing material is translated to one side of the six-sequence main mold. When the six-sequence punch die is extruded in the direction close to the six-sequence main mold, the waste material in the shearing material is squeezed out with the cooperation of the six-sequence main mold. Then, the shearing material is pushed out through the cooperation of the sixth lower mold active punch core, the sixth lower punch rod, the sixth lower punch sleeve, the sixth lower mold spring seat, the sixth lower mold sleeve two needle seat and the sixth lower mold three needle seat, thereby completing the cold heading processing of the shaft gear blank standard part.

[0027] Optionally, a material introduction groove is provided at one end of the six-sequence upper punch rod, and a material discharge groove is provided on the side wall of the six-sequence upper punch rod, and the material introduction groove is connected to the material discharge groove.

[0028] By adopting the above technical scheme, with the cooperation of the six-sequence main mold, the waste is first collected into the feed chute after being extruded, and when the waste moves into the discharge chute, the waste is discharged from the discharge chute under its own gravity, which is conducive to improving the convenience of waste discharge.

[0029] In summary, this application includes the following beneficial technical effects:

[0030] The cold heading die is composed of six punch die groups and six main dies, which continuously perform cold heading extrusion on the sheared materials, which is beneficial to cold heading extrusion of the hard metal sheared materials into the required standard parts shape, thereby meeting the cold heading processing standards of shaft gear standard parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1This is a process diagram of the sheared material of the present application passing through the 1# cold heading processing position to the 3# cold heading processing position;

[0032] Figure 2 This is a process diagram of the sheared material of the present application passing through the 4# cold heading processing position to the 6# cold heading processing position;

[0033] Figure 3 It is a schematic diagram of the overall structure of the first set of sequence molds of this application;

[0034] Figure 4 It is a schematic diagram of the assembly of a first-order punch die and a first-order main die of the present application;

[0035] Figure 5 It is a schematic diagram of the overall structure of the second group of sequence molds of the present application;

[0036] Figure 6 It is a schematic diagram of the assembly of the second-order punch die and the second-order main die of the present application;

[0037] Figure 7 It is a schematic diagram of the overall structure of the third group of sequence molds of the present application;

[0038] Figure 8 It is a schematic diagram of the assembly of the three-sequence punch die and the three-sequence main die of the present application;

[0039] Fig. 9 It is a schematic diagram of the overall structure of the fourth group of sequence molds of the present application;

[0040] Fig.10 It is a schematic diagram of the assembly of the four-sequence punch die and the four-sequence main die of the present application;

[0041] Fig.11 It is a schematic diagram of the overall structure of the fifth group of sequence molds of the present application;

[0042] Fig.12 It is a schematic diagram of the assembly of the five-sequence punch die and the five-sequence main die of the present application;

[0043] Fig.13 It is a schematic diagram of the overall structure of the sixth group of sequence molds of the present application;

[0044] Fig.14 It is a schematic diagram of the assembly of the six-sequence punch die and the six-sequence main die of the present application.

[0045] Explanation of the accompanying drawings: 1. first-order punching die; 2. second-order punching die; 3. third-order punching die; 4. fourth-order punching die; 5. fifth-order punching die; 6. sixth-order punching die; 7. first-order main die; 8. second-order main die; 9. third-order main die; 10. fourth-order main die; 11. fifth-order main die; 12. sixth-order main die; 13. first-order upper die; 14. first-order upper punch rod; 15. first-order upper punch back pad; 16. first-order lower die; 17. first-order lower punch rod; 18. first lower die sleeve; 19. first lower die T-type pad; 20. first punch platform; 21. One extrusion guide hole; 22, two-sequence upper die; 23, two-sequence upper punch rod; 24, two-sequence upper punch back pad; 25, two-sequence lower die; 26, two-sequence lower punch rod; 27, second lower die sleeve; 28, second lower die T-shaped pad; 29, second punch platform; 30, second extrusion guide hole; 31, three-sequence upper die; 32, three-sequence upper punch rod; 33, three-sequence upper punch back pad; 34, three-sequence lower die; 35, three-sequence lower punch rod; 36, third lower die sleeve; 37, third lower die T-shaped pad; 38, third punch platform; 39, third extrusion reverse guide hole; 40. The fourth sequence upper die; 41. The fourth sequence upper punch back pad; 42. The fourth sequence first upper punch rod; 43. The fourth sequence second upper punch rod; 44. The fourth sequence lower die; 45. The fourth sequence lower punch rod; 46. The fourth lower die cushion block; 47. The fourth lower die back pad; 48. The fourth lower die sleeve second needle seat; 49. The fourth lower die third needle seat; 50. The fourth punch platform; 51. Blind hole; 52. The fifth sequence upper die; 53. The fifth sequence upper punch rod; 54. The fifth sequence upper punch back pad; 55. The fifth sequence lower die; 56. The fifth sequence lower punch rod; 57. The fifth lower die cushion block; 58 , the fifth lower die rear cushion sleeve; 59, the fifth lower die sleeve second needle seat; 60, the fifth lower die third needle seat; 61, the fifth punch platform; 62, the sixth sequence upper die; 63, the sixth sequence upper punch rod; 64, the sixth sequence upper punch rear cushion; 65, the sixth sequence lower die; 66, the sixth sequence lower punch rod; 67, the sixth lower die cushion block; 68, the sixth lower punch sleeve; 69, the sixth lower die sleeve second needle seat; 70, the sixth lower die spring seat; 71, the sixth lower die movable punch core; 72, the sixth lower die third needle seat; 73, the sixth punch platform; 74, the material guide trough; 75, the material discharge trough. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-14 This application is described in further detail.

[0047] Example:

[0048] See also Figure 1-14A cold heading die for shaft gear standard parts, including a die set and a main die set respectively installed in the cold heading equipment. The die set and the movable die set are used for cold heading extrusion processing of sheared materials with a length of 65 mm. The die set and the main die set are both provided with six sequence dies, wherein the die set includes a first sequence die 1, a second sequence die 2, a third sequence die 3, a fourth sequence die 4, a fifth sequence die 5 and a sixth sequence die 6. The main die set includes a first sequence main die 7, a second sequence main die 8, a third sequence main die 9, a fourth sequence main die 10, a fifth sequence main die 11 and a sixth sequence main die 12. At the same time, a clamping robot arm is also installed in the cold heading equipment, and the clamping robot arm is used to clamp the sheared materials and send the sheared materials into the cold heading processing positions formed between the six die sets and the main die set.

[0049] After the sheared material passes through the cold heading and extrusion process of six sequential dies in succession, the hard metal sheared material is cold headed and extruded into the required standard shape of the shaft gear blank.

[0050] For details, see Figure 1 , Figure 3 and Figure 4 The first punch die 1 is correspondingly arranged with the first main die 7, and a 1# cold heading processing position is arranged between the first punch die 1 and the first main die 7. The first punch die 1 is pressed toward the first main die 7, so that the shear material is pressed into the shape enclosed by the first punch die 1 and the first main die 7.

[0051] The first-order punch die 1 comprises a first-order upper die 13, a first-order upper punch rod 14 and a first-order upper punch back pad 15, which are both fixedly installed in the first-order upper die 13. The first-order upper punch back pad 15 is used to support the first-order upper punch rod 14, and the punch head diameter of the first-order upper punch rod 14 is 33.5 mm;

[0052] The first-order main die 7 includes a first-order lower die 16, a first-order lower punch 17, a first lower die sleeve 18 and a first lower die T-shaped pad 19. The first-order lower punch 17 is slidably mounted in the first-order lower die 16, the first lower die sleeve 18 is fixedly mounted at one end of the first-order lower die 16, and the first lower die T-shaped pad 19 is slidably mounted in the first lower die sleeve 18. The first lower punch 17 can be driven to move by the first lower die T-shaped pad 19, thereby pushing out the sheared material extruded by cold heading into the first-order lower die 16. The punch of the first-order lower punch 17 is fixedly mounted with a first punching platform 20.

[0053] The first-order punch die 1 and the first-order main die 7 perform initial extrusion and flattening on the sheared material, and the total length of the current sheared material after the initial extrusion and flattening is 40.3mm. The current sheared material is divided into three sections: the first section is in the shape of a truncated cone, and the diameters of the two ends of the cone are 33.6mm and 49.2mm respectively, and the length of the cone is 8.2mm; the second section is in the shape of a cylinder, and the diameter of the cylinder is 49.2mm, and the length of the cylinder is 18.1mm; the third section is in the shape of a truncated cone with an arc-shaped side, and the diameters of the two ends of the cone are 34.3mm and 49.2mmm respectively, and the length of the cone is 14mm, and the cone is extruded to form a first extrusion guide hole 21, and the first punch 20 corresponds to the shape of the first extrusion guide hole 21.

[0054] For details, see Figure 1 , Figure 5 and Figure 6 The second punch die 2 is set corresponding to the second main die 8, and the second cold heading processing position is set between the second punch die 2 and the second main die 8. The sheared material of the clamping mechanical arm is turned 180 degrees and then sent to the second cold heading processing position. The second punch die 2 is pressed toward the direction of the second main die 8, so that the sheared material is pressed into the shape enclosed by the second punch die 2 and the second main die 8.

[0055] The second-order punch die 2 includes a second-order upper die 22, a second-order upper punch rod 23 and a second-order upper punch back pad 24. The second-order upper punch rod 23 and the second-order upper punch back pad 24 are both fixedly installed in the second-order upper die 22, and the second-order upper punch rod 23 protrudes outside the second-order upper die 22;

[0056] The second-order main die 8 includes a second-order lower die 25, a second-order lower punch 26, a second lower die sleeve 27 and a second lower die T-shaped pad 28. The second-order lower punch 26 is slidably mounted in the second-order lower die 25, the second lower die sleeve 27 is fixedly mounted at one end of the second-order lower die 25, and the second lower die T-shaped pad 28 is slidably mounted in the second lower die sleeve 27. The second-order lower punch 26 can be driven to move by the second lower die T-shaped pad 28, so as to push out the sheared material extruded by cold heading into the second-order lower die 25. The punches of the second-order upper punch 23 and the second-order lower punch 26 are respectively fixedly mounted with a second punching platform 29.

[0057] The second punch die 2 and the second main die 8 squeeze and flatten the cut material again. The total length of the cut material is 36.4 mm and the outer diameter is 49.4 mm. The four end corners of the cut material are all rounded, and the two ends of the cut material are extruded to form the second extrusion guide hole 30, and the second punching platform 29 corresponds to the shape of the second extrusion guide hole 30.

[0058] For details, see Figure 1 , Figure 7 and Figure 8The three-sequence punch 3 and the three-sequence main die 9 are set correspondingly, and the 3# cold heading processing position is set between the three-sequence punch 3 and the three-sequence main die 9. The clamping mechanical arm resets the sheared material and flips it 180° before sending it to the 3# cold heading processing position. The three-sequence punch 3 is pressed toward the direction of the three-sequence main die 9, so that the sheared material is pressed into the shape enclosed by the three-sequence punch 3 and the three-sequence main die 9.

[0059] The three-sequence punch die 3 includes a three-sequence upper die 31, a three-sequence upper punch rod 32 and a three-sequence upper punch back pad 33. The three-sequence upper punch rod 32 and the three-sequence upper punch back pad 33 are both fixedly installed in the three-sequence upper die 31, and the three-sequence upper punch rod 32 protrudes outside the three-sequence upper die 31;

[0060] The three-sequence main die 9 includes a three-sequence lower die 34, a three-sequence lower punch 35, a third lower die sleeve 36 and a third lower die T-shaped pad 37. The three-sequence lower punch 35 is slidably mounted in the three-sequence lower die 34, the third lower die sleeve 36 is fixedly mounted at one end of the three-sequence lower die 34, and the third lower die T-shaped pad 37 is slidably mounted in the third lower die sleeve 36. The three-sequence lower punch 35 can be driven to move by the third lower die T-shaped pad 37, so as to push out the sheared material extruded by cold heading into the three-sequence lower die 34. The punch of the three-sequence lower punch 35 is fixedly mounted with a third punching platform 38.

[0061] After two flattening processes, the size of the cut material is close to the required size. Then the three-stage punch die 3 and the three-stage main die 9 perform the first extrusion molding on the cut material. The total length of the current cut material is 23.4mm, the cut material is in a stepped shape, the outer diameter is 67.5mm, and one end of the cut material is extruded to form the third extrusion guide hole, and the third punching platform 38 corresponds to the third extrusion guide hole.

[0062] For details, see Figure 2 , Fig. 9 and Fig.10 The four-sequence punch die 4 is set corresponding to the four-sequence main die 10, and the 4# cold heading processing position is set between the four-sequence punch die 4 and the four-sequence main die 10. The clamping mechanical arm moves the sheared material into the 4# cold heading processing position, and the four-sequence punch die 4 is extruded in the direction of the four-sequence main die 10, so that the sheared material is extruded into the shape enclosed by the four-sequence punch die 4 and the four-sequence main die 10.

[0063] The four-sequence punch die 4 includes a four-sequence upper die 40, a four-sequence upper punch rear pad 41, a four-sequence first upper punch rod 42, and a four-sequence second upper punch rod 43. The four-sequence upper punch rear pad 41, the four-sequence first upper punch rod 42, and the four-sequence second upper punch rod 43 are all fixedly installed in the four-sequence upper die 40, the four-sequence second upper punch rod 43 is fixedly sleeved on the outer side wall of the four-sequence first upper punch rod 42, the four-sequence second upper punch rod 43 extends outside the four-sequence upper die 40, and the four-sequence first upper punch rod 42 extends outside the four-sequence second upper punch rod 43;

[0064] The four-sequence main mold 10 includes a four-sequence lower mold 44, a four-sequence lower punch 45, a fourth lower mold cushion block 46 and a fourth lower mold rear cushion sleeve 47. The fourth lower mold cushion block 46 is fixedly mounted on one end of the four-sequence lower punch 45, and the four-sequence lower punch 45 is slidably mounted in the four-sequence lower mold 44 through the fourth lower mold cushion block 46. The fourth lower mold rear cushion sleeve 47 is fixedly mounted on one end of the four-sequence lower mold 44, and the fourth lower mold sleeve second needle seat 48 and the fourth lower mold third needle seat 49 are slidably mounted in the fourth lower mold rear cushion sleeve 47. The fourth lower mold sleeve second needle seat 48 and the fourth lower mold third needle seat 49 are used to push out the four-sequence lower punch 45. The punches of the four-sequence first upper punch 42 and the four-sequence lower punch 45 are respectively fixedly mounted with the fourth punch platform 50.

[0065] The fourth punch die 4 and the fourth main die 10 perform a second extrusion molding on the sheared material. The total length of the current sheared material is 22 mm, and the sheared material is in a standard stepped shape. The diameter of the first step is 68.1 mm, and the diameter of the second step is 49.9 mm. Blind holes 51 are extruded at both ends of the sheared material, and the fourth punch 50 corresponds to the shape of the blind hole 51.

[0066] For details, see Figure 2 , Fig.11 and Fig.12 The five-sequence punch 5 and the five-sequence main die 11 are set correspondingly, and the 5# cold heading processing position is set between the five-sequence punch 5 and the five-sequence main die 11. The clamping mechanical arm moves the sheared material into the 5# cold heading processing position, and the five-sequence punch 5 is pressed toward the direction of the five-sequence main die 11, so that the sheared material is extruded into the shape enclosed by the five-sequence punch 5 and the five-sequence main die 11.

[0067] The five-sequence punch die 5 comprises a five-sequence upper die 52, a five-sequence upper punch rod 53 and a five-sequence upper punch back pad 54. The five-sequence upper punch rod 53 and the five-sequence upper punch back pad 54 are both fixedly installed in the five-sequence upper die 52. The five-sequence upper punch rod 53 extends outside the five-sequence upper die 52;

[0068] The five-sequence main mold 11 includes a five-sequence lower mold 55, a five-sequence lower punch 56, a fifth lower mold cushion block 57 and a fifth lower mold rear cushion sleeve 58. The fifth lower mold cushion block 57 is fixedly mounted on one end of the five-sequence lower punch 56, and the five-sequence lower punch 56 is slidably mounted in the five-sequence lower mold 55 through the fifth lower mold cushion block 57. The fifth lower mold rear cushion sleeve 58 is fixedly mounted on one end of the five-sequence lower mold 55, and the fifth lower mold sleeve second needle seat 59 and the fifth lower mold third needle seat 60 are slidably mounted in the fifth lower mold rear cushion sleeve 58. The fifth lower mold sleeve second needle seat 59 and the fifth lower mold third needle seat 60 are used to push out the five-sequence lower punch 56. The punches of the five-sequence upper punch 53 and the five-sequence lower punch 56 are respectively fixedly mounted with the fifth punch platform 61, and the fifth punch platform 61 is used to deepen the depth of the blind hole 51.

[0069] The five-sequence punch die 5 and the five-sequence main die 11 perform a third extrusion molding on the sheared material. The total length of the current sheared material is 30.1 mm. The sheared material also presents a standard stepped shape, with a diameter of 50 mm for the first step and a diameter of 68.7 mm for the second step. The depth of the blind holes 51 at both ends of the sheared material is increased.

[0070] For details, see Figure 2 , Fig.13 and Fig.14 , the six-sequence punch 6 and the six-sequence main die 12 are set correspondingly, and the 6# cold heading processing position is set between the six-sequence punch 6 and the six-sequence main die 12. The clamping robot moves the sheared material into the 6# cold heading processing position, and the six-sequence punch 6 is extruded in the direction of the six-sequence main die 12, so that the sheared material is extruded into the shape enclosed by the six-sequence punch 6 and the six-sequence main die 12, and the waste material is extruded and discharged.

[0071] The six-sequence punch die 6 comprises a six-sequence upper die 62, a six-sequence upper punch rod 63 and a six-sequence upper punch rear pad 64. The six-sequence upper punch rod 63 and the six-sequence upper punch rear pad 64 are both fixedly installed in the six-sequence upper die 62, and the six-sequence upper punch rod 63 extends outside the six-sequence upper die 62;

[0072] The six-sequence main mold 12 includes a six-sequence lower mold 65, a six-sequence lower punch 66, a sixth lower mold cushion block 67, a sixth lower punch sleeve 68, a sixth lower mold sleeve second needle seat 69, a sixth lower mold spring seat 70, a sixth lower mold movable punch core 71 and a sixth lower mold three needle seat 72. Under the cooperation of the sixth lower mold cushion block 67, the sixth lower punch sleeve 68, the sixth lower mold sleeve second needle seat 69, the sixth lower mold spring seat 70, the sixth lower mold movable punch core 71 and the sixth lower mold three needle seat 72, the six-sequence lower punch 66 is driven to push the sheared material out of the six-sequence lower mold 65. The punch of the six-sequence lower punch 66 is fixedly installed with a sixth punch platform 73, which is used to penetrate the blind hole 51 so that the middle part of the sheared material is penetrated.

[0073] The six-sequence punch die 6 and the six-sequence main die 12 perform the fourth extrusion molding on the sheared material. The total length of the current sheared material is 30.2, the sheared material has completed the cold heading process, and the current sheared material is a standard part of the shaft gear blank. The sheared material is also in a standard step shape, the diameter of the first step is 50mm, the diameter of the second step is 68.9mm, and the blind hole 51 of the sheared material is through.

[0074] It is worth noting that see Fig.14 One end of the six-sequence upper punch rod 63 extending outside the six-sequence punch die 6 is provided with a material introduction groove 74, and at the same time, the side wall of the six-sequence upper punch rod 63 is also provided with a material discharge groove 75, and the material introduction groove 74 is connected to the material discharge groove 75.

[0075] Working principle of a cold heading die for shaft gear standard parts:

[0076] When the raw material rod is cut into a single section with a length of 65mm, the shear is translated into the 1# cold heading processing position by the clamping robot arm, and the first-order punch die 1 is cold-forged and extruded in the direction of the first-order main die 7 to perform the initial flattening processing. The current total length of the shear is 40.3mm, and it is divided into three sections: the first section is in the shape of a truncated cone, and the diameters of the two ends of the cone are 33.6mm and 49.2mm respectively, and the length of the cone is 8.2mm; the second section is in the shape of a cylinder, and the diameter of the cylinder is 49.2mm, and the length of the cylinder is 18.1mm; the third section is in the shape of a truncated cone with an arc-shaped side, and the diameters of the two ends of the cone are 34.3mm and 49.2mmm respectively, and the length of the cone is 14mm, and the extrusion molding of the cone has a first extrusion guide hole 21.

[0077] After the processing at the 1# cold heading processing position is completed, the first-order lower punch 17 pushes the sheared material out, and the clamping robot arm synchronously flips the sheared material 180° and then moves it horizontally to the 2# cold heading processing position. The second-order punch 2 is cold-forged and extruded in the direction of the second-order main die 8, and then flattened for the second time, so that the length of the sheared material is closer to the completion standard. The total length of the current sheared material is 36.4mm and the outer diameter is 49.4mm. The four end corners of the sheared material are all provided with rounded corners, and the two ends of the sheared material are extruded with second extrusion guide holes 30.

[0078] After the processing at the 2# cold heading processing position is completed, the second-order lower punch 26 pushes the sheared material out, and the clamping mechanical arm synchronously resets the sheared material and flips it 180°, then moves it horizontally to the 3# cold heading processing position. The third-order punch 3 cold-forges and extrudes in the direction of the third-order main die 9 to perform the first extrusion molding operation. The total length of the current sheared material is 23.4mm, the sheared material is in a stepped shape, the outer diameter is 67.5mm, and one end of the sheared material is extruded to form the third extrusion guide hole.

[0079] After the processing at the 3# cold heading processing position is completed, the 3# lower punch 35 pushes the sheared material out, and the clamping robot synchronously moves the sheared material to the 4# cold heading processing position. The 4# punch die 4 cold heads the 4# main die 10 to perform the second extrusion molding operation. The total length of the current sheared material is 22mm, and the sheared material is in a standard step shape, with a diameter of 68.1mm for the first step and a diameter of 49.9mm for the second step, and blind holes 51 are extruded at both ends of the sheared material.

[0080] After the processing at the 4# cold heading processing position is completed, the 4# lower punch 45 pushes the sheared material out, and the clamping robot synchronously moves the sheared material to the 5# cold heading processing position. The 5# punch die 5 cold heads the 5# main die 11 to perform the third extrusion molding operation. The total length of the current sheared material is 30.1mm, and the sheared material is also in a standard step shape, with a diameter of 50mm for the first step and 68.7mm for the second step, and the blind holes 51 at both ends of the sheared material have increased hole depth.

[0081] After the processing of the 5# cold heading processing position is completed, the 5# lower punch 56 pushes the sheared material out, and the clamping robot arm synchronously translates the sheared material to the 6# cold heading processing position. The 6# punch die 6 cold heads the 6# main die 12 to perform the fourth extrusion molding operation. The total length of the current sheared material is 30.2, the sheared material has completed the cold heading processing, and the current sheared material is the standard part of the shaft gear blank. The sheared material is also in a standard stepped shape, with a diameter of 50mm for the first step and a diameter of 68.9mm for the second step, and the blind hole 51 of the sheared material is through.

[0082] In summary, after two times of extrusion and flattening, it is beneficial to cold-forge the long and hard single-section sheared material to a length close to the shaft gear blank standard part. Then, after four consecutive extrusions, the sheared material is extruded into the required shape of the shaft gear blank standard part, thereby improving the yield rate of the shaft gear standard part processed by cold forging.

[0083] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cold heading die for shaft gear standard parts, comprising a punch die set and a main die set, characterized in that: The die set comprises a first-sequence die (1), a second-sequence die (2), a third-sequence die (3), a fourth-sequence die (4), a fifth-sequence die (5) and a sixth-sequence die (6); the main die set comprises a first-sequence main die (7), a second-sequence main die (8), a third-sequence main die (9), a fourth-sequence main die (10), a fifth-sequence main die (11) and a sixth-sequence main die (12); the first-sequence die (1) is arranged correspondingly to the first-sequence main die (7); the second-sequence die (2) is arranged correspondingly to the second-sequence main die (8); the third-sequence die (3) is arranged correspondingly to the third-sequence main die (9); the fourth-sequence die (4) is arranged correspondingly to the fourth-sequence main die (10); the fifth-sequence die (5) is arranged correspondingly to the fifth-sequence main die (11); and the sixth-sequence die (6) is arranged correspondingly to the sixth-sequence main die (12).

2. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The first-order punch die (1) comprises a first-order upper die (13), wherein a first-order upper punch back pad (15) and a first-order upper punch rod (14) are arranged in the first-order upper die (13); The first-order main die (7) comprises a first-order lower die (16), a first-order lower punch rod (17) is arranged inside the first-order lower die (16), a first lower die sleeve (18) is arranged at one end of the first-order lower die (16), a first lower die T-shaped pad (19) is arranged inside the first lower die sleeve (18), and a punch of the first-order lower punch rod (17) is provided with a first punching platform (20).

3. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The second-order punch die (2) comprises a second-order upper die (22), and a second-order upper punch back pad (24) and a second-order upper punch rod (23) are arranged in the second-order upper die (22); The second-order main die (8) comprises a second-order lower die (25), a second-order lower punch rod (26) is arranged inside the second-order lower die (25), a second lower die sleeve (27) is arranged at one end of the second-order lower die (25), a second lower die T-shaped pad (28) is arranged inside the second lower die sleeve (27), and the punches of the second-order upper punch rod (23) and the second-order lower punch rod (26) are respectively provided with second punch platforms (29).

4. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The three-sequence punch die (3) comprises a three-sequence upper die (31), and a three-sequence upper punch back pad (33) and a three-sequence upper punch rod (32) are arranged in the three-sequence upper die (31); The three-sequence main die (9) comprises a three-sequence lower die (34), a three-sequence lower punch rod (35) is arranged inside the three-sequence lower die (34), a third lower die sleeve (36) is arranged at one end of the three-sequence lower die (34), a third lower die T-shaped pad (37) is arranged inside the third lower die sleeve (36), and a punch of the three-sequence lower punch rod (35) is provided with a third punch platform (38).

5. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The four-sequence punch die (4) comprises a four-sequence upper die (40), a four-sequence upper punch back pad (41) and a four-sequence first upper punch rod (42) are arranged in the four-sequence upper die (40), and a four-sequence second upper punch rod (43) is arranged in the four-sequence first upper punch rod (42); The four-sequence main mold (10) comprises a four-sequence lower mold (44), wherein a four-sequence lower punch rod (45) and a fourth lower mold cushion block (46) are arranged inside the four-sequence lower mold (44), a fourth lower mold rear cushion sleeve (47) is arranged at one end of the four-sequence lower mold (44), a fourth lower mold sleeve second needle seat (48) and a fourth lower mold third needle seat (49) are arranged inside the fourth lower mold rear cushion sleeve (47), and the punches of the four-sequence first upper punch rod (42) and the four-sequence lower punch rod (45) are respectively fixedly mounted with a fourth punch platform (50).

6. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The five-sequence punch die (5) comprises a five-sequence upper die (52), and a five-sequence upper punch rod (53) and a five-sequence upper punch back pad (54) are arranged inside the five-sequence upper die (52); The five-sequence main mold (11) comprises a five-sequence lower mold (55), wherein a five-sequence lower punch rod (56) and a five-sequence lower mold (55) pad are arranged inside the five-sequence lower mold (55), a fifth lower mold rear cushion sleeve (58) is arranged at one end of the five-sequence lower mold (55), a fifth lower mold sleeve second needle seat (59) and a fifth lower mold third needle seat (60) are arranged inside the fifth lower mold rear cushion sleeve (58), and the punches of the five-sequence upper punch rod (53) and the five-sequence lower punch rod (56) are respectively fixedly mounted with a fifth punch platform (61).

7. The cold heading die for shaft gear standard parts according to claim 1, characterized in that: The six-sequence punch die (6) comprises a six-sequence upper die (62), and a six-sequence upper punch rod (63) and a six-sequence upper punch rear pad (64) are arranged in the six-sequence upper die (62); The six-sequence main mold (12) comprises a six-sequence lower mold (65), in which a sixth lower mold movable punch core (71), a six-sequence lower punch rod (66), a sixth lower punch sleeve (68), a sixth lower mold spring seat (70), a sixth lower mold sleeve second needle seat (69) and a sixth lower mold third needle seat (72) are sequentially arranged, and the punch of the six-sequence lower punch rod (66) is fixedly installed with a sixth punch platform (73).

8. The cold heading die for shaft gear standard parts according to claim 7, characterized in that: A material introduction groove (74) is provided at one end of the six-sequence upper punch rod (63), a material discharge groove (75) is provided on the side wall of the six-sequence upper punch rod (63), and the material introduction groove (74) is communicated with the material discharge groove (75).

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