A cold heading equipment and cold heading die for shaft gear standard parts

Abstract

The present application relates to the technical field of cold heading equipment, and in particular to a cold heading equipment and cold heading die for shaft gear standard parts, which includes a frame, a punch die set and a main die set are arranged in the frame, a cold heading processing position is arranged between the punch die set and the main die set, a receiving tray is arranged at the inner bottom of the frame, a pump body is arranged in the receiving tray, a pipe rack is arranged on the top surface of the frame, one end of the pipe rack is fixedly connected to the discharge end of the pump body, the other end of the pipe rack extends into the receiving tray, an oil spray pipe is arranged on the side wall of the pipe rack, one end of the oil spray pipe is away from the pipe rack and faces the cold heading processing position, and the frame is provided with an oil and gas suction mechanism for absorbing oil and gas. The present application has the effect of reducing the heat of the die during cold heading processing and improving the yield rate of shearing cold heading processing.

Description

Technical Field

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

[0002] Cold heading machine is a forging and forming equipment that thickens the top of bars or wires at room temperature. It is a special equipment mainly used for upsetting and mass production of standard parts such as nuts, bolts, shafts and gears. Cold heading machine uses cold upsetting method to perform cold upsetting and extrusion processing on workpieces, which can minimize cutting work and directly form into the required shape and size, which can not only save a lot of materials, but also greatly improve production efficiency and significantly improve the mechanical strength of upset parts.

[0003] The invention patent with authorization announcement number CN110695284B discloses a cold heading machine, including a frame and a main motor, a main shaft, a feeding assembly, a cutting assembly, a forming assembly and a discharging assembly arranged on the frame. When cold heading processing is required, the rod is first fed into the frame through the feeding assembly, and then the rod is cut into single-section shears through the cutting assembly, and then the shears are continuously cold headed and extruded through the forming assembly, and finally the finished shears are sent out through the discharging assembly to complete the cold heading extrusion processing.

[0004] However, when the forming assembly performs cold heading processing on the sheared material, a large amount of heat is generated during the deformation process. Over a long period of time, the high temperature will cause the mold material to expand thermally, resulting in mold size changes, deformation, and even cracking and falling off, which will ultimately affect the cold heading processing quality of the sheared material. Summary of the invention

[0005] In order to reduce the heat of the mold during cold heading processing and improve the yield rate of shearing cold heading processing, the present application provides a cold heading equipment and a cold heading mold for shaft gear standard parts.

[0006] In the first aspect, the present application provides a cold heading device for shaft gear standard parts, which adopts the following technical solution:

[0007] A cold heading device for shaft gear standard parts comprises a frame, wherein a punch die group and a main die group are arranged in the frame, a cold heading processing position is arranged between the punch die group and the main die group, a receiving tray is arranged at the inner bottom of the frame, a pump body is arranged in the receiving tray, a pipe rack is arranged on the top surface of the frame, one end of the pipe rack is fixedly connected to the discharge end of the pump body, and the other end of the pipe rack extends into the receiving tray, an oil injection pipe is arranged on the side wall of the pipe rack, and one end of the oil injection pipe faces away from the pipe rack toward the cold heading processing position, and the frame is provided with an oil and gas suction mechanism for absorbing oil and gas.

[0008] By adopting the above technical solution, when it is necessary to reduce the heat of the die group and the main die group, first pour cooling oil into the receiving tray, and then start the pump body. The pump body transports the cooling oil to the pipe rack, and then flows out from the oil spray pipe. At this time, the cooling oil is sprayed onto the cold heading processing position, thereby cooling the sheared material placed at the cold heading processing position, thereby reducing the heat transfer. However, since the cooling oil evaporates into oil and gas due to heat, the oil and gas can be sucked out by the oil and gas suction mechanism at this time, thereby improving the working environment of the production workshop.

[0009] Optionally, the oil and gas suction mechanism includes a suction hood, a fixed frame is provided on the top surface of the frame, the suction hood is arranged on the inner top wall of the fixed frame, a suction pipe is connected to the side wall of the suction hood, an end of the suction pipe facing away from the suction hood is connected to an oil and gas recovery cooling system, a rotating seat is provided on the inner top wall of the fixed frame, a rotating rod is rotatably arranged in the rotating seat, a swing rod is provided at one end of the rotating rod, the rotating rod is arranged at a positive angle to the swing rod, the end of the swing rod facing away from the rotating rod is rotatably connected to the suction hood, and the fixed frame is provided with a transmission assembly for driving the swing rod to swing.

[0010] By adopting the above technical solution, when the transmission assembly drives the swing arm to swing, the swing arm swings with the rotating rod as the axis. Since the rotating rod and the swing arm are arranged at a positive angle, the swing arm drives the suction hood to rotate greatly, thereby increasing the suction range. The oil and gas suction hood sucks into the suction pipe, and then sucks into the oil and gas recovery cooling system through the suction pipe, which is beneficial to improve the stability of oil and gas suction.

[0011] Optionally, the transmission assembly includes a transmission rod, a transmission seat is provided on the inner top wall of the fixed frame, the transmission rod is slidably connected to the transmission seat, one end of the transmission rod is fixedly connected to the top surface of the die group, the other end of the transmission rod is hingedly provided with a sliding sleeve, the side wall rotating sleeve of the swing arm is provided with a swing sleeve, the top of the swing sleeve is provided with a sliding rod, and the sliding sleeve is slidably sleeved on the sliding rod.

[0012] By adopting the above technical solution, when the die group moves toward the direction close to the main die group, the die group drives the transmission rod to move forward, and the transmission rod drives the slide rod to swing through the sliding sleeve, and the slide rod drives the swing rod to swing with the rotating rod as the axis through the swing sleeve, and the swing rod drives the suction hood to swing. During the continuous reciprocating movement of the die group, the suction hood continues to swing, which is beneficial to reduce additional driving electrical appliances and increase the suction range of the suction hood.

[0013] On the other hand, the present application provides a cold heading die for shaft gear standard parts, including the die group and the main die group, the die group includes a first-sequence die, a second-sequence die, a third-sequence die, a fourth-sequence die, a fifth-sequence die and a sixth-sequence die, the main die group includes 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 die is arranged corresponding to the first-sequence main die, the second-sequence die is arranged corresponding to the second-sequence main die, the third-sequence die is arranged corresponding to the third-sequence main die, the fourth-sequence die is arranged corresponding to the fourth-sequence main die, the fifth-sequence die is arranged corresponding to the fifth-sequence main die, and the sixth-sequence die is arranged corresponding to the sixth-sequence main die.

[0014] By adopting the above technical solution, a cold heading die composed of six punch die groups and six main die groups 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.

[0015] 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;

[0016] 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.

[0017] 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.

[0018] 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;

[0019] 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.

[0020] 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.

[0021] 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;

[0022] 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.

[0023] 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.

[0024] 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;

[0025] 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.

[0026] 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.

[0027] 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;

[0028] 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.

[0029] 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.

[0030] 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;

[0031] The six-sequence main mold includes a six-sequence lower mold, in which a six-core lower mold movable punch, a six-sequence lower punch rod, a six-sequence lower punch sleeve, a six-sequence lower mold spring seat, a six-sequence lower mold sleeve two-needle seat and a six-sequence lower mold sleeve three-needle seat are arranged in sequence, and the punch of the six-sequence lower punch rod is fixedly installed with a sixth punch platform.

[0032] 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 six-core lower mold movable punch core, the six-sequence lower punch rod, the six-sequence lower punch sleeve, the six-sequence lower mold spring seat, the six-sequence lower mold sleeve two-needle seat and the six-sequence lower mold sleeve three-needle seat, thereby completing the cold heading processing of the shaft gear blank standard part.

[0033] In summary, this application includes the following beneficial technical effects:

[0034] When it is necessary to reduce the heat of the punch die group and the main die group, first pour cooling oil into the receiving tray, then start the pump body, the pump body transports the cooling oil to the pipe rack, and then flows out from the oil spray pipe. At this time, the cooling oil is sprayed onto the cold heading processing position, thereby cooling the sheared material placed at the cold heading processing position, thereby reducing the heat transfer. However, since the cooling oil evaporates into oil gas due to heat, the oil gas can be sucked out by the oil and gas suction device at this time to improve the working environment of the production workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the cold heading equipment for shaft gear standard parts of the present application;

[0036] Figure 2 It is a schematic diagram of the overall structure of the pipe rack and the fuel injection pipe of the present application;

[0037] Figure 3 It is a schematic diagram of the overall structure of the fixing frame of the present application;

[0038] Figure 4 This is a schematic diagram of the overall structure of the oil and gas suction mechanism of this application.

[0039] Figure 5 This 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;

[0040] Figure 6 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;

[0041] Figure 7 It is a schematic diagram of the overall structure of the first set of sequence molds of this application;

[0042] Figure 8 It is a schematic diagram of the assembly of a first-order punch die and a first-order main die of the present application;

[0043] Fig. 9 It is a schematic diagram of the overall structure of the second group of sequence molds of the present application;

[0044] Fig.10It is a schematic diagram of the assembly of the second-order punch die and the second-order main die of the present application;

[0045] Fig.11 It is a schematic diagram of the overall structure of the third group of sequence molds of the present application;

[0046] Fig.12 It is a schematic diagram of the assembly of the three-sequence punch die and the three-sequence main die of the present application;

[0047] Fig.13 It is a schematic diagram of the overall structure of the fourth group of sequence molds of the present application;

[0048] Fig.14 It is a schematic diagram of the assembly of the four-sequence punch die and the four-sequence main die of the present application;

[0049] Fig.15 It is a schematic diagram of the overall structure of the fifth group of sequence molds of the present application;

[0050] Fig.16 It is a schematic diagram of the assembly of the five-sequence punch die and the five-sequence main die of the present application;

[0051] Fig.17 It is a schematic diagram of the overall structure of the sixth group of sequence molds of the present application;

[0052] Fig.18 It is a schematic diagram of the assembly of the six-sequence punch die and the six-sequence main die of the present application.

[0053] Explanation of the reference numerals: 1. frame; 2. punching die set; 3. main die set; 4. cold heading processing position; 5. pipe rack; 6. oil injection pipe; 7. suction hood; 8. fixed frame; 9. suction pipe; 10. rotating seat; 11. rotating rod; 12. swing rod; 13. transmission rod; 14. transmission seat; 15. sliding sleeve; 16. swing sleeve; 17. sliding rod; 18. first-order punching die; 19. second-order punching die; 20. third-order punching die; 21. fourth-order punching die; 22. fifth-order punching die; 23. sixth-order punching die; 24. first-order main die; 25. second-order main die; 26. third-order main die; 27. fourth-order main die; 28. fifth-order main die ; 29, six-sequence main mold; 30, first-sequence upper mold; 31, first-sequence upper punch rod; 32, first-sequence upper punch back pad; 33, first-sequence lower mold; 34, first-sequence lower punch rod; 35, first lower mold sleeve; 36, first lower mold T-type pad; 37, first punch platform; 38, first extrusion guide hole; 39, second-sequence upper mold; 40, second-sequence upper punch rod; 41, second-sequence upper punch back pad; 42, second-sequence lower mold; 43, second-sequence lower punch rod; 44, second lower mold sleeve; 45, second lower mold T-type pad; 46, second punch platform; 47, second extrusion guide hole; 48, third-sequence upper mold; 49, third-sequence upper punch rod; 50, third-sequence upper punch back pad ; 51, three-sequence lower die; 52, three-sequence lower punch; 53, third lower die sleeve; 54, third lower die T-type pad; 55, third punch platform; 56, four-sequence upper die; 57, four-sequence upper punch back pad; 58, four-sequence first upper punch; 59, four-sequence second upper punch; 60, four-sequence lower die; 61, four-sequence lower punch; 62, fourth lower die cushion; 63, fourth lower die back cushion; 64, fourth lower die sleeve second needle seat; 65, fourth lower die third needle seat; 66, fourth punch platform; 67, blind hole; 68, five-sequence upper die; 69, five-sequence upper punch; 70, five-sequence upper punch back pad; 71, five-sequence lower die; 72, The fifth sequence lower punch; 73, the fifth lower die pad; 74, the fifth lower die rear cushion sleeve; 75, the fifth lower die sleeve second needle seat; 76, the fifth lower die third needle seat; 77, the fifth punch platform; 78, the sixth sequence upper die; 79, the sixth sequence upper punch; 80, the sixth sequence upper punch rear cushion; 81, the sixth sequence lower die; 82, the sixth sequence lower punch; 83, the sixth lower die pad; 84, the sixth lower punch sleeve; 85, the sixth lower die sleeve second needle seat; 86, the sixth lower die spring seat; 87, the sixth lower die movable punch core; 88, the sixth lower die third needle seat; 89, the sixth punch platform; 90, the guide trough; 91, the lower trough; 92, the third extrusion guide hole. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-18 This application is described in further detail.

[0055] Example:

[0056] First, see Figure 1-Figure 5A cold heading equipment for shaft gear standard parts, comprising a frame 1. A punch die set 2 and a main die set 3 are installed in the frame 1, and the punch die set 2 and the main die set 3 are used for cold heading extrusion processing of sheared materials, and the initial length of the sheared materials is 65 mm. A cold heading processing position 4 is set between the punch die set 2 and the main die set 3, and a clamp arm for driving the sheared materials to be transported and moved is installed in the frame 1. A receiving tray is fixedly installed at the inner bottom of the frame 1, and the receiving tray is used to hold cooling oil. A pump body is installed in the receiving tray, and a pipe rack 5 is fixedly installed on the top surface of the frame 1, and the pipe rack 5 is frame-shaped. One end of the pipe rack 5 is fixedly connected to the discharge end of the pump body, and the other end of the pipe rack 5 passes through the frame 1 and extends into the receiving tray. The side wall of the pipe rack 5 is fixedly connected with an oil injection pipe 6 . There are a plurality of oil injection pipes 6 . The plurality of oil injection pipes 6 are spaced apart along the length direction of the pipe rack 5 , and the oil injection direction of the plurality of oil injection pipes 6 is toward the cold heading processing position 4 .

[0057] During the cold heading process of the sheared material by the punch die set 2 and the main die set 3, the extrusion deformation of the sheared material generates high heat. Therefore, the pump body is started first, and the pump body sucks the cooling oil in the receiving tray into the pipe rack 5. The cooling oil is then sprayed out from multiple oil spray pipes 6, and at the same time, the cold heading extrusion station is sprayed to cool the sheared material and the die.

[0058] See also Figure 3 and Figure 4 In order to extract the oil and gas generated when the cooling oil evaporates due to heat, the frame 1 is equipped with an oil and gas suction mechanism, which includes a suction hood 7. A fixing frame 8 is also fixed on the top surface of the frame 1, and the suction hood 7 is installed on the inner top wall of the fixing frame 8. The side wall of the suction hood 7 is fixedly connected with a suction pipe 9, which is a hose, and the end of the suction pipe 9 away from the suction hood 7 is fixedly connected with an oil and gas recovery cooling system. The oil and gas recovery cooling system is a common system in the art, which uses the liquefaction principle to liquefy high-temperature oil and gas into oil droplets.

[0059] A rotating seat 10 is fixed to the inner top wall of the fixed frame 8, a rotating rod 11 is rotatably mounted in the rotating seat 10, one end of the rotating rod 11 is fixedly connected to a swing rod 12, and the angle between the rotating rod 11 and the swing rod 12 is set as a positive angle. The suction hood 7 is rotatably connected to the end of the swing rod 12 away from the rotating rod 11.

[0060] See also Figure 1 and Figure 4 In order to continuously drive the suction hood 7 to swing, the fixed frame 8 is also equipped with a transmission assembly, which includes a transmission rod 13. A transmission seat 14 is fixed to the inner top of the fixed frame 8, and the transmission rod 13 is slidably connected to the transmission seat 14. The transmission rod 13 is in a right angle shape, one end of the transmission rod 13 is fixedly connected to the top surface of the die assembly 2, and the other end of the transmission rod 13 is hingedly installed with a sliding sleeve 15. The side wall of the swing rod 12 is rotatably sleeved with a swing sleeve 16, and a sliding rod 17 is fixed to the top of the swing sleeve 16, and the sliding sleeve 15 is slidably sleeved on the sliding rod 17.

[0061] Working principle of a cold heading equipment for shaft gear standard parts:

[0062] When it is necessary to reduce the heat of the die set 2 and the main die set 3, first pour cooling oil into the receiving tray, then start the pump body, the pump body transports the cooling oil to the pipe rack 5, and then flows out from the oil spray pipe 6. At this time, the cooling oil is sprayed onto the cold heading processing position 4, thereby cooling the sheared material placed at the cold heading processing position 4, thereby reducing the heat transfer.

[0063] When the die set 2 moves toward the direction close to the main die set 3, the die set 2 drives the transmission rod 13 to move toward the direction of the main die set 3. Since the transmission rod 13 is hinged with the sliding sleeve 15, and the sliding sleeve 15 is slidably mounted on the sliding rod 17, the transmission rod 13 drives the sliding rod 17 to swing through the sliding sleeve 15. Since the swing sleeve 16 is rotatably mounted on the swing sleeve 16, the sliding rod 17 drives the swing rod 12 to swing 180° with the rotating rod 11 as the axis through the swing sleeve 16. On the contrary, when the die set 2 moves away from the main die set 3, the sliding rod 17 drives the swing rod 12 to continue to swing 180° with the rotation as the axis through the swing sleeve 16. In this cycle, under the rotation restriction of the suction hood 7 by the suction pipe 9, the swing rod 12 continuously drives the suction hood 7 to rotate with the rotating rod 11 as the axis, thereby increasing the suction range of the suction hood 7 and sucking the oil and gas evaporated by heat.

[0064] On the other hand, see Figure 5-Figure 18 A cold heading die for a shaft gear standard part includes a die set 2 and a main die set 3 in a frame 1. The die set 2 and the main die set 3 are both provided with six sequence dies, wherein the die set 2 includes a first sequence die 18, a second sequence die 19, a third sequence die 20, a fourth sequence die 21, a fifth sequence die 22 and a sixth sequence die 23. The main die set 3 includes a first sequence main die 24, a second sequence main die 25, a third sequence main die 26, a fourth sequence main die 27, a fifth sequence main die 28 and a sixth sequence main die 29.

[0065] 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.

[0066] See also Figure 5 , Figure 7 and Figure 8 The first punch die 18 is correspondingly arranged with the first main die 24, and the first cold heading processing position 4 is set between the first punch die 18 and the first main die 24. The first punch die 18 is pressed toward the first main die 24, so that the shear material is pressed into the shape enclosed by the first punch die 18 and the first main die 24.

[0067] The first-order punch die 18 includes a first-order upper die 30, a first-order upper punch rod 31 and a first-order upper punch back pad 32. The first-order upper punch rod 31 and the first-order upper punch back pad 32 are fixedly installed in the first-order upper die 30. The first-order upper punch back pad 32 is used to support the first-order upper punch rod 31. The punch head diameter of the first-order upper punch rod 31 is 33.5 mm.

[0068] The first-order main die 24 includes a first-order lower die 33, a first-order lower punch 34, a first lower die sleeve 35 and a first lower die T-shaped pad 36. The first-order lower punch 34 is slidably mounted in the first-order lower die 33, the first lower die sleeve 35 is fixedly mounted at one end of the first-order lower die 33, and the first lower die T-shaped pad 36 is slidably mounted in the first lower die sleeve 35. The first lower punch 34 can be driven to move by the first lower die T-shaped pad 36, so as to push out the sheared material extruded by cold heading into the first-order lower die 33. The punch of the first-order lower punch 34 is fixedly mounted with a first punching platform 37.

[0069] The first-order punch die 18 and the first-order main die 24 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 38, and the first punch 37 corresponds to the shape of the first extrusion guide hole 38.

[0070] See also Figure 5 , Fig. 9 and Fig.10 The second punch die 19 is arranged corresponding to the second main die 25, and a 2# cold heading processing position 4 is arranged between the second punch die 19 and the second main die 25. The second punch die 19 is pressed toward the direction of the second main die 25, so that the shear material is pressed into a shape enclosed by the second punch die 19 and the second main die 25.

[0071] The second-order punch die 19 includes a second-order upper die 39, a second-order upper punch rod 40 and a second-order upper punch rear pad 41. The second-order upper punch rod 40 and the second-order upper punch rear pad 41 are both fixedly installed in the second-order upper die 39, and the second-order upper punch rod 40 protrudes outside the second-order upper die 39;

[0072] The second-order main die 25 includes a second-order lower die 42, a second-order lower punch 43, a second lower die sleeve 44, and a second lower die T-shaped pad 45. The second-order lower punch 43 is slidably mounted in the second-order lower die 42, the second lower die sleeve 44 is fixedly mounted at one end of the second-order lower die 42, and the second lower die T-shaped pad 45 is slidably mounted in the second lower die sleeve 44. The second-order lower punch 43 can be driven to move by the second lower die T-shaped pad 45, so as to push out the sheared material extruded by cold heading into the second-order lower die 42. The punches of the second-order upper punch 40 and the second-order lower punch 43 are respectively fixedly mounted with a second punching platform 46.

[0073] The second punch die 19 and the second main die 25 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 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 47, and the second punching platform 46 corresponds to the shape of the second extrusion guide hole 47.

[0074] See also Figure 5 , Fig.11 and Fig.12 The three-sequence punch 20 is correspondingly arranged with the three-sequence main die 26, and a 3# cold heading processing position 4 is set between the three-sequence punch 20 and the three-sequence main die 26. The three-sequence punch 20 is extruded in the direction of the three-sequence main die 26, so that the shear material is extruded into the shape enclosed by the three-sequence punch 20 and the three-sequence main die 26.

[0075] The three-sequence punch die 20 includes a three-sequence upper die 48, a three-sequence upper punch rod 49 and a three-sequence upper punch back pad 50. The three-sequence upper punch rod 49 and the three-sequence upper punch back pad 50 are both fixedly installed in the three-sequence upper die 48, and the three-sequence upper punch rod 49 protrudes outside the three-sequence upper die 48;

[0076] The three-sequence main die 26 includes a three-sequence lower die 51, a three-sequence lower punch 52, a third lower die sleeve 53 and a third lower die T-shaped pad 54. The three-sequence lower punch 52 is slidably mounted in the three-sequence lower die 51, the third lower die sleeve 53 is fixedly mounted at one end of the three-sequence lower die 51, and the third lower die T-shaped pad 54 is slidably mounted in the third lower die sleeve 53. The three-sequence lower punch 52 can be driven to move by the third lower die T-shaped pad 54, so as to push out the sheared material extruded by cold heading into the three-sequence lower die 51. The punch of the three-sequence lower punch 52 is fixedly mounted with a third punching platform 55.

[0077] After two flattening processes, the size of the cut material is close to the required size. Then the three-stage punch die 20 and the three-stage main die 26 perform the first extrusion molding on the cut material. The total length of the current cut material is 23.4 mm, the cut material is in a stepped shape, the outer diameter is 67.5 mm, and one end of the cut material is extruded to form the third extrusion guide hole, and the third punching platform 55 corresponds to the third extrusion guide hole.

[0078] See also Figure 6 , Fig.13 and Fig.14, the four-sequence punch 21 is correspondingly arranged with the four-sequence main die 27, and a 4# cold heading processing position 4 is set between the four-sequence punch 21 and the four-sequence main die 27. The four-sequence punch 21 is extruded in the direction of the four-sequence main die 27, so that the shear material is extruded into the shape enclosed by the four-sequence punch 21 and the four-sequence main die 27.

[0079] The four-sequence punch die 21 includes a four-sequence upper die 56, a four-sequence upper punch back pad 57, a four-sequence first upper punch rod 58, and a four-sequence second upper punch rod 59. The four-sequence upper punch back pad 57, the four-sequence first upper punch rod 58, and the four-sequence second upper punch rod 59 are all fixedly installed in the four-sequence upper die 56, the four-sequence second upper punch rod 59 is fixedly sleeved on the outer side wall of the four-sequence first upper punch rod 58, the four-sequence second upper punch rod 59 extends outside the four-sequence upper die 56, and the four-sequence first upper punch rod 58 extends outside the four-sequence second upper punch rod 59;

[0080] The four-sequence main mold 27 includes a four-sequence lower mold 60, a four-sequence lower punch 61, a fourth lower mold cushion block 62 and a fourth lower mold rear cushion sleeve 63. The fourth lower mold cushion block 62 is fixedly mounted on one end of the four-sequence lower punch 61, and the four-sequence lower punch 61 is slidably mounted in the four-sequence lower mold 60 through the fourth lower mold cushion block 62. The fourth lower mold rear cushion sleeve 63 is fixedly mounted on one end of the four-sequence lower mold 60, and the fourth lower mold sleeve second needle seat 64 and the fourth lower mold third needle seat 65 are slidably mounted in the fourth lower mold rear cushion sleeve 63. The fourth lower mold sleeve second needle seat 64 and the fourth lower mold third needle seat 65 are used to push out the four-sequence lower punch 61. The punches of the four-sequence first upper punch 58 and the four-sequence lower punch 61 are respectively fixedly mounted with the fourth punch platform 66.

[0081] The four-sequence punch die 21 and the four-sequence main die 27 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 67 are extruded at both ends of the sheared material, and the fourth punch 66 corresponds to the shape of the blind hole 67.

[0082] See also Figure 6 , Fig.15 and Fig.16 The five-sequence punch 22 is correspondingly arranged with the five-sequence main die 28, and a 5# cold heading processing position 4 is set between the five-sequence punch 22 and the five-sequence main die 28. The five-sequence punch 22 is extruded in the direction of the five-sequence main die 28, so that the shear material is extruded into a shape enclosed by the five-sequence punch 22 and the five-sequence main die 28.

[0083] The five-sequence punch die 22 includes a five-sequence upper die 68, a five-sequence upper punch rod 69 and a five-sequence upper punch back pad 70. The five-sequence upper punch rod 69 and the five-sequence upper punch back pad 70 are both fixedly installed in the five-sequence upper die 68. The five-sequence upper punch rod 69 extends outside the five-sequence upper die 68;

[0084] The five-sequence main mold 28 includes a five-sequence lower mold 71, a five-sequence lower punch 72, a fifth lower mold cushion block 73 and a fifth lower mold rear cushion sleeve 74. The fifth lower mold cushion block 73 is fixedly mounted on one end of the five-sequence lower punch 72, and the five-sequence lower punch 72 is slidably mounted in the five-sequence lower mold 71 through the fifth lower mold cushion block 73. The fifth lower mold rear cushion sleeve 74 is fixedly mounted on one end of the five-sequence lower mold 71, and the fifth lower mold sleeve second needle seat 75 and the fifth lower mold third needle seat 76 are slidably mounted in the fifth lower mold rear cushion sleeve 74. The fifth lower mold sleeve second needle seat 75 and the fifth lower mold third needle seat 76 are used to push out the five-sequence lower punch 72. The punches of the five-sequence upper punch 69 and the five-sequence lower punch 72 are respectively fixedly mounted with the fifth punch platform 77, and the fifth punch platform 77 is used to deepen the depth of the blind hole 67.

[0085] The five-sequence punch die 22 and the five-sequence main die 28 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 step shape, with a diameter of 50 mm for the first step and a diameter of 68.7 mm for the second step. The blind holes 67 at both ends of the sheared material have an increased hole depth.

[0086] See also Figure 6 , Fig.17 and Fig.18 The six-sequence punch 23 is correspondingly arranged with the six-sequence main die 29, and a 6# cold heading processing position 4 is set between the six-sequence punch 23 and the six-sequence main die 29. The six-sequence punch 23 is extruded in the direction of the six-sequence main die 29, so that the shear material is extruded into the shape enclosed by the six-sequence punch 23 and the six-sequence main die 29, and the waste material is extruded and discharged.

[0087] The six-sequence punch die 23 includes a six-sequence upper die 78, a six-sequence upper punch rod 79 and a six-sequence upper punch rear pad 80. The six-sequence upper punch rod 79 and the six-sequence upper punch rear pad 80 are both fixedly installed in the six-sequence upper die 78, and the six-sequence upper punch rod 79 extends outside the six-sequence upper die 78;

[0088] The six-sequence main mold 29 includes a six-sequence lower mold 81, a six-sequence lower punch 82, a sixth lower mold cushion block 83, a sixth lower punch sleeve 84, a sixth lower mold sleeve second needle seat 85, a sixth lower mold spring seat 86, a sixth lower mold movable punch core 87, and a sixth lower mold three-needle seat 88. Under the cooperation of the sixth lower mold cushion block 83, the sixth lower punch sleeve 84, the sixth lower mold sleeve second needle seat 85, the sixth lower mold spring seat 86, the sixth lower mold movable punch core 87, and the sixth lower mold three-needle seat 88, the six-sequence lower punch 82 is driven to push the sheared material out of the six-sequence lower mold 81. The punch of the six-sequence lower punch 82 is fixedly installed with a sixth punch platform 89, which is used to penetrate the blind hole 67 so that the middle part of the sheared material is penetrated.

[0089] The six-sequence punch die 23 and the six-sequence main die 29 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 67 of the sheared material is through.

[0090] It is worth noting that see Fig.18 A material introduction groove 90 is provided at one end of the six-sequence upper punch rod 79 extending outside the six-sequence punch die 23, and a material discharge groove 91 is also provided on the side wall of the six-sequence upper punch rod 79, and the material introduction groove 90 is connected to the material discharge groove 91.

[0091] Working principle of a cold heading die for shaft gear standard parts:

[0092] 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 4 by the clamp arm, and the first-order punch die 18 is cold-forged and extruded in the direction of the first-order main die 24 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 38.

[0093] After the processing of the 1# cold heading processing position 4 is completed, the first-order lower punch 34 pushes the sheared material out, and the clamp arm synchronously turns the sheared material 180° and then moves it horizontally to the 2# cold heading processing position 4. The second-order punch 19 cold-forging and extruding in the direction of the second-order main die 25, and then the second flattening processing is performed to make the length of the sheared material 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 47.

[0094] After the processing of the 2# cold heading processing position 4 is completed, the second-order lower punch 43 pushes out the sheared material, and the clamp arm synchronously resets the sheared material and turns it 180°, and then moves it horizontally to the 3# cold heading processing position 4. The third-order punch 20 cold-forging and extrudes in the direction of the third-order main die 26 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.

[0095] After the processing of the 3# cold heading processing position 4 is completed, the 3# lower punch 52 pushes the sheared material out, and the clamp arm synchronously translates the sheared material to the 4# cold heading processing position 4. The 4# punch die 21 cold heads the 4# main die 27 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 49.9mm for the second step, and blind holes 67 are extruded at both ends of the sheared material.

[0096] After the processing of the 4# cold heading processing position 4 is completed, the 4# lower punch 61 pushes the sheared material out, and the clamp arm synchronously moves the sheared material to the 5# cold heading processing position 4. The 5# punch die 22 cold heads the 5# main die 28 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 a diameter of 68.7mm for the second step, and the blind holes 67 at both ends of the sheared material have increased hole depth.

[0097] After the processing of the 5# cold heading processing position 4 is completed, the 5# lower punch 72 pushes the sheared material out, and the clamp arm synchronously moves the sheared material to the 6# cold heading processing position 4. The 6# punch die 23 cold heads the 6# main die 29 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 step shape, the diameter of the first step is 50mm, the diameter of the second step is 68.9mm, and the blind hole 67 of the sheared material is through.

[0098] 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.

[0099] 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 device for shaft gear standard parts, comprising a frame (1), characterized in that: The frame (1) is provided with a punching die group (2) and a main die group (3), a cold heading processing position (4) is provided between the punching die group (2) and the main die group (3), the inner bottom of the frame (1) is provided with a receiving tray, a pump body is provided in the receiving tray, a pipe rack (5) is provided on the top surface of the frame (1), one end of the pipe rack (5) is fixedly connected to the discharge end of the pump body, the other end of the pipe rack (5) extends into the receiving tray, a side wall of the pipe rack (5) is connected with an oil injection pipe (6), one end of the oil injection pipe (6) facing away from the pipe rack (5) is oriented toward the cold heading processing position (4), and the frame (1) is provided with an oil and gas suction mechanism for absorbing oil and gas; The oil and gas suction mechanism comprises a suction hood (7), a fixing frame (8) is provided on the top surface of the frame (1), the suction hood (7) is arranged on the inner top wall of the fixing frame (8), a suction pipe (9) is arranged in communication with the side wall of the suction hood (7), an end of the suction pipe (9) away from the suction hood (7) is arranged in communication with an oil and gas recovery cooling system, a rotating seat (10) is provided on the inner top wall of the fixing frame (8), a rotating rod (11) is rotatably arranged in the rotating seat (10), a swing rod (12) is arranged at one end of the rotating rod (11), the rotating rod (11) and the swing rod (12) are arranged at a positive angle, the end of the swing rod (12) away from the rotating rod (11) is rotatably connected to the suction hood (7), and the fixing frame (8) is provided with a transmission component for driving the swing rod (12) to swing; The transmission assembly comprises a transmission rod (13), a transmission seat (14) is provided on the inner top wall of the fixed frame (8), the transmission rod (13) is slidably connected to the transmission seat (14), one end of the transmission rod (13) is fixedly connected to the top surface of the punching die assembly (2), the other end of the transmission rod (13) is hingedly provided with a sliding sleeve (15), the side wall of the swing rod (12) is rotatably sleeved with a swing sleeve (16), the top end of the swing sleeve (16) is provided with a sliding rod (17), and the sliding sleeve (15) is slidably sleeved on the sliding rod (17); The cold heading equipment for the shaft gear standard part also includes a cold heading die, the cold heading die includes the die set (2) and the main die set (3), the die set (2) includes a first-order die (18), a second-order die (19), a third-order die (20), a fourth-order die (21), a fifth-order die (22) and a sixth-order die (23), the main die set (3) includes a first-order main die (24), a second-order main die (25), a third-order main die (26), a fourth-order main die (27), a fifth-order main die (28) ) and a six-sequence main die (29), the first-sequence punch die (18) is arranged correspondingly to the first-sequence main die (24), the second-sequence punch die (19) is arranged correspondingly to the second-sequence main die (25), the third-sequence punch die (20) is arranged correspondingly to the third-sequence main die (26), the fourth-sequence punch die (21) is arranged correspondingly to the fourth-sequence main die (27), the fifth-sequence punch die (22) is arranged correspondingly to the fifth-sequence main die (28), and the sixth-sequence punch die (23) is arranged correspondingly to the sixth-sequence main die (29).

2. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The first-order punch die (18) comprises a first-order upper die (30), wherein a first-order upper punch back pad (32) and a first-order upper punch rod (31) are arranged in the first-order upper die (30); The first-order main die (24) comprises a first-order lower die (33), a first-order lower punch rod (34) is arranged inside the first-order lower die (33), a first lower die sleeve (35) is arranged at one end of the first-order lower die (33), a first lower die T-shaped pad (36) is arranged inside the first lower die sleeve (35), and a punch of the first-order lower punch rod (34) is provided with a first punch platform (37).

3. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The second-order punch die (19) comprises a second-order upper die (39), and a second-order upper punch back pad (41) and a second-order upper punch rod (40) are arranged in the second-order upper die (39); The second-order main die (25) comprises a second-order lower die (42), a second-order lower punch rod (43) is arranged inside the second-order lower die (42), a second lower die sleeve (44) is arranged at one end of the second-order lower die (42), a second lower die T-shaped pad (45) is arranged inside the second lower die sleeve (44), and the punches of the second-order upper punch rod (40) and the second-order lower punch rod (43) are respectively provided with second punch platforms (46).

4. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The three-sequence punch die (20) comprises a three-sequence upper die (48), and a three-sequence upper punch back pad (50) and a three-sequence upper punch rod (49) are arranged in the three-sequence upper die (48); The three-sequence main die (26) comprises a three-sequence lower die (51), a three-sequence lower punch rod (52) is arranged inside the three-sequence lower die (51), a third lower die sleeve (53) is arranged at one end of the three-sequence lower die (51), a third lower die T-shaped pad (54) is arranged inside the third lower die sleeve (53), and a punch of the three-sequence lower punch rod (52) is provided with a third punch platform (55).

5. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The four-sequence punch die (21) comprises a four-sequence upper die (56), a four-sequence upper punch back pad (57) and a four-sequence first upper punch rod (58) are arranged in the four-sequence upper die (56), and a four-sequence second upper punch rod (59) is arranged in the four-sequence first upper punch rod (58); The four-sequence main mold (27) includes a four-sequence lower mold (60), in which a four-sequence lower punch rod (61) and a fourth lower mold cushion block (62) are arranged, one end of the four-sequence lower mold (60) is provided with a fourth lower mold rear cushion sleeve (63), and the fourth lower mold sleeve second needle seat (64) and the fourth lower mold third needle seat (65) are arranged in the fourth lower mold rear cushion sleeve (63), and the punches of the four-sequence first upper punch rod (58) and the four-sequence lower punch rod (61) are respectively fixedly installed with a fourth punch platform (66).

6. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The five-sequence punch die (22) comprises a five-sequence upper die (68), and a five-sequence upper punch rod (69) and a five-sequence upper punch rear pad (70) are arranged in the five-sequence upper die (68); The five-sequence main mold (28) comprises a five-sequence lower mold (71), wherein a five-sequence lower punch rod (72) and a five-sequence lower mold (71) pad are arranged inside the five-sequence lower mold (71), a fifth lower mold rear cushion sleeve (74) is arranged at one end of the five-sequence lower mold (71), a fifth lower mold sleeve second needle seat (75) and a fifth lower mold third needle seat (76) are arranged inside the fifth lower mold rear cushion sleeve (74), and the punches of the five-sequence upper punch rod (69) and the five-sequence lower punch rod (72) are respectively fixedly mounted with a fifth punch platform (77).

7. The cold heading equipment for shaft gear standard parts according to claim 1, characterized in that: The six-sequence punch die (23) comprises a six-sequence upper die (78), and a six-sequence upper punch rod (79) and a six-sequence upper punch rear pad (80) are arranged in the six-sequence upper die (78); The six-sequence main mold (29) comprises a six-sequence lower mold (81), in which a six-core lower mold movable punch, a six-sequence lower punch rod (82), a six-sequence lower punch sleeve, a six-sequence lower mold (81) spring seat, a six-sequence lower mold (81) sleeve two needle seat and a six-sequence lower mold (81) sleeve three needle seat are arranged in sequence, and the punch of the six-sequence lower punch rod (82) is fixedly installed with a sixth punch platform (89).

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