Final upsetting male die and final upsetting female die thereof

Abstract

The utility model relates to a final upsetting male die and a final upsetting female die thereof.The final upsetting male die comprises an ejection device, the ejection device comprises an ejection pipe, the left end of the ejection pipe is connected with a first material pushing rod, and a push rod is slidably arranged in the ejection pipe; a first elastic piece is connected between the push rod and the first material pushing rod; the left end of the first ejector rod is located in the ejector sleeve and abuts against the push rod. One end of the second ejector rod mounting piece abuts against the right end of the ejector tube, and the second ejector rod is arranged in the second ejector rod mounting piece in a sliding mode; and a second elastic piece is connected between the second ejector rod and the second ejector rod mounting piece. According to the cold heading machine, material receiving and edge cutting can be achieved in the cold heading process, the technological process is simplified, and the production period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading dies, in particular to a final heading male die and a final heading female die. Background Art

[0002] Rivets are widely used products in various industries. They use their own deformation or interference connection to connect the riveted parts. The principle is to rivet non-metallic materials to prevent the separation of two parts. It has the effect of fixing and connecting. It uses specific special tools to perform riveting or welding between two workpieces, which is a connection process that is easy to operate.

[0003] Figure 1 The figure shows a short rivet 600 of the prior art. Currently, there are generally two methods for processing the short rivet 600. One is to complete it by CNC turning. The other is to complete it by CNC turning after cold heading, that is, the rivet rod of the short rivet is processed by cold heading, but in order to facilitate the connection of materials, the length of the obtained rivet rod is longer than the process length of the rivet rod 610 of the final product, and the obtained rivet cap is still round (the rivet cap 620 of the final product is square). Therefore, it is necessary to turn the length of the rivet rod by CNC again, and then turn and mill the rivet cap into a square to obtain the finished product. This process has a long processing cycle, unstable delivery time, and cannot meet the customer's usage and fast delivery process. In addition, see Figure 2 The traditional trimming process shown is that the male mold A is subjected to force on the mold surface C along the axial direction E of the trimming piece B, and the trimming piece B is used to cut off the excess material F of the product, and finally the process size of the final product D is obtained. However, this structure has large burrs, large eccentricity between the rod and the head, and is difficult to adjust.

[0004] The key to the problem is that in the prior art, since the short rivets are too short, it is difficult to rely solely on the clamping robot arm to connect the materials in the final upsetting process, and the short rivets are easy to escape from the material connection range of the clamping robot arm. Figure 3 As shown, the states of the material joining process are 3-1, 3-2 and 3-3. Secondly, the cold heading die in the prior art is also difficult to join and trim between the dies in the final heading process. Since it is the final heading process, if the material cannot be joined, it means that special trimming cannot be performed. Since the cold heading die in the prior art is difficult to join, it is also difficult to trim in the cold heading process.

[0005] In summary, the existing structure has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to provide a final forging male die and a final forging female die of a cold forging die, which can realize material connection and edge trimming during the cold forging process, simplify the process flow and shorten the production cycle.

[0007] In order to achieve the above object, the utility model provides a final upsetting male die, including an ejection device, the ejection device comprising:

[0008] A push tube, the left end of which is connected to a first push rod along its axial direction, and a push rod is slidably arranged inside the push tube along its axial direction; a first elastic member is connected between the push rod and the first push rod; a first opening adapted to the first push rod is provided at the right end of the push tube;

[0009] The left end of the first push rod can be slidably disposed inside the push tube and abut against the push rod, and the other end extends out of the first opening;

[0010] A second push rod mounting member, one end of which abuts against the right end of the push tube, and the other end of which is provided with a second opening adapted to the second push rod;

[0011] The left end of the second push rod can be slidably arranged inside the second push rod mounting member, and the other end extends out of the second opening; a second elastic member is connected between the second push rod and the second push rod mounting member.

[0012] According to the final upsetting male die, two first push rods are provided, and two first push rods are provided corresponding to two first openings;

[0013] The second push rod mounting member is located between the two first push rods.

[0014] According to the final upsetting male die, the radial width of the left end of the first push rod is greater than the radial width of the first opening;

[0015] The radial width of the left end of the second push rod is greater than the radial width of the second opening.

[0016] According to the final upsetting male die, it also includes a male die shell having an inner cavity;

[0017] The ejection device is arranged in the inner cavity, and the left end of the male mold shell is provided with a third opening adapted to the push tube, and the right end thereof is provided with a fourth opening adapted to the first ejector rod and a fifth opening adapted to the second ejector rod mounting member; the radial width of the left end of the second ejector rod mounting member is greater than the radial width of the fifth opening.

[0018] In order to achieve the above object, the utility model provides a final upsetting female die, which is used in conjunction with any of the above-mentioned final upsetting male dies, and includes a molding device, wherein the molding device includes:

[0019] The mounting member has a mounting cavity at its axial left end and a first passage adapted to the third push rod extending therethrough along its axial direction; a third elastic member is disposed in the mounting cavity;

[0020] A molding part, a molding cavity is formed at its left end, and a second channel adapted to the third ejector rod is opened through the molding part along its axial direction, and the second channel is coaxially arranged with the first channel;

[0021] The left end of the third push rod can be slidably disposed in the first channel and the second channel;

[0022] The third elastic member is disposed between the forming member and the mounting member;

[0023] The trimming piece is sleeved on the outer side of the forming piece, and the forming piece is slidably arranged relative to the trimming piece.

[0024] According to the final upsetting female die, the third elastic member is connected to the third ejector rod.

[0025] According to the final upsetting female die, the forming device further comprises a fixed pad connected to the left end of the mounting member and having a third passage running axially therethrough and adapted to the forming member.

[0026] According to the final upsetting female die, the left end of the fixed pad is connected to the right end of the trimming piece through a connecting pipe.

[0027] According to the final upsetting female die, the right end of the third push rod is connected to the second push rod.

[0028] According to the final upsetting female die, it also includes:

[0029] A female mold shell, wherein the molding device is arranged inside the female mold shell;

[0030] A locking nut is fixedly connected to the outer side of the mounting member, the locking thread is provided with an external thread, and the female mold shell is provided with an internal thread matched with the external thread; the female mold shell is threadedly connected to the locking nut.

[0031] The final upsetting male die of the embodiment provided by the utility model can be used in conjunction with the final upsetting female die, and the final upsetting male die includes an ejection device, and the ejection device includes a push tube, which is used to push the second ejector mounting member; a first ejector rod is connected to the left end along its axial direction, and the entire ejection device can be pushed by pushing the first ejector rod; a push rod is slidably provided inside the push tube along its axial direction, and the push rod is used to push the first ejector rod; a first elastic member is connected between the push rod and the first ejector rod; when the first ejector rod squeezes the push rod, the push rod squeezes the first elastic member so that the first ejector rod can be reset by the elastic force of the first elastic member. A second ejector rod is installed in the second ejector mounting member, and a second elastic member is connected between the second ejector rod and the second ejector mounting member, and the second ejector rod can be reset by the elastic force of the second elastic member. The final upsetting female die includes a forming device, which includes a mounting piece for mounting a third elastic piece and other parts, an mounting cavity is provided along the axial left end thereof, and a first channel adapted to the third push rod is opened through the axial direction thereof; a third elastic piece is provided in the mounting cavity, and the third elastic piece is used to push the forming piece to reset; a forming cavity is formed at the left end of the forming piece, and a second channel adapted to the third push rod is opened through the axial direction thereof, the second channel is coaxially arranged with the first channel, and the third push rod penetrates into the first channel and the second channel; the third elastic piece is arranged between the forming piece and the mounting piece; a trimming piece is sleeved on the outer side of the forming piece, and the forming piece is slidable relative to the trimming piece. The first push rod and the second push rod of the final upsetting male die and the third push rod of the final upsetting female die respectively clamp the two end faces of the blank to be final upsetting, and then the final upsetting male die pushes the blank to move in the direction of the final upsetting female die, until one end of the blank to be trimmed is clamped between the trimming piece and the final upsetting male die, the material connection is completed. The final upsetting male die continues to apply force in the direction of the final upsetting female die, so that the blank undergoes plastic deformation, the sharp trimming piece trims one end of the blank to be trimmed, and the final upsetting male die squeezes the remaining blank into the molding cavity of the final upsetting female die, and a molded product is obtained by cold upsetting. In this way, the utility model can realize material connection and trimming during the cold upsetting process, simplify the process flow, and shorten the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a short rivet provided by the prior art;

[0033] Figure 2 It is a work flow chart of the trimming process provided by the prior art;

[0034] Figure 3 It is a work flow chart of the clamping mechanical arm provided by the prior art;

[0035] Figure 4 It is a structural schematic diagram of a final upsetting male die provided in one embodiment of the utility model;

[0036] Figure 5 This is a front view of a push tube provided by an embodiment of the utility model;

[0037] Figure 6 It is a right side view of a push tube provided by an embodiment of the utility model;

[0038] Figure 7 It is a structural schematic diagram of a push rod provided by an embodiment of the utility model;

[0039] Figure 8 It is a structural schematic diagram of a first elastic member provided by an embodiment of the utility model;

[0040] Fig. 9 It is a structural schematic diagram of a first push rod provided in one embodiment of the utility model;

[0041] Fig.10 It is a cross-sectional schematic diagram of a first push rod provided in one embodiment of the utility model;

[0042] Fig.11 It is a front view of a second push rod mounting member provided by an embodiment of the utility model;

[0043] Fig.12 It is a right side view of a second mandrel mounting member provided by an embodiment of the utility model;

[0044] Fig.13 It is a structural schematic diagram of a second push rod provided in one embodiment of the utility model;

[0045] Fig.14 It is a structural schematic diagram of a second elastic member provided in one embodiment of the utility model;

[0046] Fig.15 This is a front view of a male mold shell provided by an embodiment of the utility model;

[0047] Fig.16 It is a right side view of a male mold shell provided by one embodiment of the utility model;

[0048] Fig.17 It is a structural schematic diagram of a final upsetting female die provided in one embodiment of the utility model;

[0049] Fig.18 It is a structural schematic diagram of a mounting member provided in one embodiment of the utility model;

[0050] Fig.19 It is a structural schematic diagram of a third elastic member provided in one embodiment of the utility model;

[0051] Fig. 20 This is a front view of a molded part provided by an embodiment of the utility model;

[0052] Fig.21 It is a left side view of a molded part provided by one embodiment of the utility model;

[0053] Fig. 22 It is a structural schematic diagram of a third push rod provided in one embodiment of the utility model;

[0054] Fig.23 This is a front view of a trimming piece provided by an embodiment of the utility model;

[0055] Fig.24 It is a left side view of a trimming piece provided by one embodiment of the utility model;

[0056] Fig.25 This is a front view of a fixed cushion block provided in one embodiment of the utility model;

[0057] Fig.26 It is a left side view of a fixed cushion block provided in one embodiment of the utility model;

[0058] Fig. 27 This is a schematic diagram of the structure of the connecting pipe provided by an embodiment of the utility model;

[0059] Fig.28 It is a structural schematic diagram of a female mold shell provided by an embodiment of the utility model;

[0060] Fig.29 It is a structural schematic diagram of a locking nut provided by an embodiment of the utility model;

[0061] Fig.30 This is one of the state diagrams of the material connection process of the final upsetting male die and the final upsetting female die provided in one embodiment of the utility model;

[0062] Fig.31 This is the second state diagram of the material connection process of the final upsetting male die and the final upsetting female die provided by an embodiment of the utility model;

[0063] Fig.32 This is the third state diagram of the material connection process of the final upsetting male die and the final upsetting female die provided by one embodiment of the utility model;

[0064] Fig.33 It is a state diagram of the trimming process of the final upsetting male die and the final upsetting female die provided by one embodiment of the utility model;

[0065] Fig.34 It is one of the state diagrams of the blanking process of the final upsetting male die and the final upsetting female die provided in one embodiment of the utility model;

[0066] Fig.35 This is the second state diagram of the blanking process of the final upsetting male die and the final upsetting female die provided in one embodiment of the utility model. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0068] It should also be pointed out that the terms used in the present invention, such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “head”, “tail”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0069] See also Figures 4 to 16 In one embodiment of the present utility model, a final upsetting male die 100 is provided, comprising an ejection device 1, the ejection device 1 comprising:

[0070] The push tube 10 is connected to a first push rod 11 at its left end along the axial direction, and a push rod 12 is slidably arranged inside the push tube 10 along the axial direction; a first elastic member 13 is connected between the push rod 12 and the first push rod 11; a first opening 101 adapted to the first push rod 14 is opened at the right end of the push tube 10;

[0071] The left end of the first push rod 14 is slidably disposed inside the push tube 10 and abuts against the push rod 12, and the other end extends out of the first opening 101;

[0072] A second push rod mounting member 15, one end of which abuts against the right end of the push tube 10, and the other end of which is provided with a second opening 151 adapted to the second push rod 16;

[0073] The left end of the second push rod 16 is slidably disposed inside the second push rod mounting member 15 , and the other end thereof extends out from the second opening 151 ; a second elastic member 17 is connected between the second push rod 16 and the second push rod mounting member 15 .

[0074] In this embodiment, the final upsetting male die 100 can be used together with the final upsetting female die 200, and can be used to connect and trim the blank 300 before forming such as short rivets in the cold upsetting die, and the blank 300 includes an end 310 to be trimmed. After the blank 300 is connected, trimming is performed. During trimming, the final upsetting male die 100 continues to push the blank 300 to cause the blank 300 to undergo plastic deformation, and the sharp trimming piece 24 trims the end 310 to be trimmed of the blank 300. At this time, the trimming residue 400 of the blank 300 remains between the first push rod 14 and the trimming piece 24 of the final upsetting female die 200, and the second push rod mounting piece 15 continues to extrude the remaining blank into the forming piece 22, so that the remaining blank undergoes plastic deformation to obtain a formed product 500 (see Fig.33 ). Specifically, the left end of the push tube 10 is connected to the first push rod 11, and the first push rod 11 can push the entire ejection device 1. When receiving the material, when the first push rod 11 pushes toward the final upsetting female die 200, it drives the push tube 10, and then pushes the second push rod mounting member 15 and the push rod 12, and then the second push rod mounting member 15 pushes the second push rod 16 and the push rod 12 to push the first push rod 14 to move toward the final upsetting female die 200, the first push rod 14 and the second push rod 16 are used to abut against one end 310 of the blank 300 to be trimmed, and the third push rod 23 of the final upsetting female die 200 is used to abut against the other end of the blank 300, and the first push rod 11 continues to be applied in the direction of the final upsetting female die 200. The first push rod 14 and the second push rod 16 respectively compress the first elastic member 13 and the second elastic member 17 under the reaction force of the blank 300 until the end faces of the first push rod 14 and the end faces of the second push rod 16 are flush with the end face of the second push rod mounting member 15; the first push rod 11 continues to push in the direction of the final upsetting female die 200, at this time, the first push rod 14, the second push rod 16 and the third push rod 23 jointly clamp the blank 300 and move it in the direction of the final upsetting female die 200 until the end 310 to be trimmed abuts against the trimming member 24, and the material connection is completed (see Fig.32 ). Since the first push rod 14 can squeeze the first elastic member 13 while squeezing the push rod 12, the first push rod 14 can be reset by the elastic force of the first elastic member 13 (which can be a spring). After the final upsetting female die 200 trims one end 310 of the blank 300 to be trimmed, trimming residue 400 will be generated. After the cold upsetting is completed, the first push rod 14 is used to push the trimming residue 400 out of the final upsetting male die 100 by resetting, so that it falls off. After the cold upsetting is completed, the third push rod 23 pushes the molded product 500 out of the final upsetting female die 200, and the second push rod 16 is used to push the molded product 500 out of the final upsetting male die 100 by resetting elastic force, and finally completes the blanking of the molded product 500 (see Fig.35 ).

[0075] See also Figure 4As an optional embodiment, two first push rods 14 are provided, and two first openings 101 are provided corresponding to the two first push rods 14;

[0076] The second push rod mounting member 15 is located between the two first push rods 14 .

[0077] In this embodiment, since the two first push rods 14 are used to eject the trimming residue 400, and the second push rod mounting member 15 is used to drive the second push rod 16 to continue to push the remaining blank into the final forging female mold 200 and undergo plastic deformation, and after obtaining the molded product 500, the second push rod 16 is required to eject the molded product 500 out of the final forging male mold 100, thus, the first push rod 14 is set to correspond to the position of the trimming residue 400, and the second push rod 16 is set to correspond to the position of the remaining blank 300, that is, the second push rod mounting member 15 is located between the two first push rods 14.

[0078] See also Figure 4 As an optional embodiment, the radial width of the left end of the first push rod 14 is greater than the radial width of the first opening 101; this can prevent the first push rod 14 from slipping out of the first opening 101;

[0079] The radial width of the left end of the second push rod 16 is greater than the radial width of the second opening 151 , which can prevent the second push rod 16 from slipping out of the second opening 151 .

[0080] As an optional embodiment, the cold heading male die further includes a male die shell 18 having an inner cavity 181 for protecting the ejection device 1;

[0081] The ejection device 1 is arranged in the inner cavity 181, and the left end of the male mold shell 18 is provided with a third opening 182 adapted to the push tube 10, and the push tube 10 can extend from the third opening 182; the right end of the male mold shell 18 is provided with a fourth opening 183 adapted to the first ejector rod 14 and a fifth opening 184 adapted to the second ejector rod mounting member 15, the first ejector rod 14 extends from the fourth opening 183, and the second ejector rod mounting member 15 extends from the fifth opening 184; the radial width of the left end of the second ejector rod mounting member 15 is greater than the radial width of the fifth opening 184 to prevent it from slipping out of the male mold shell 18.

[0082] See also Figures 17 to 29 In one embodiment of the present invention, a final upsetting female die 200 is provided, which is used in conjunction with any of the above-mentioned final upsetting male dies 100, and includes a forming device 2, and the forming device 2 includes:

[0083] The mounting member 20 has a mounting cavity 201 at its left end along the axial direction, and a first channel 202 adapted to the third push rod 23 is opened through the mounting cavity 201 along the axial direction; a third elastic member 21 is arranged in the mounting cavity 201;

[0084] The molding part 22 has a molding cavity 221 formed at its left end, and a second channel 222 adapted to the third ejector rod 23 is formed through the molding part 22 along its axial direction, and the second channel 222 is coaxially arranged with the first channel 202;

[0085] The left end of the third push rod 23 can be slidably disposed in the first channel 202 and the second channel 222;

[0086] The third elastic member 21 is disposed between the forming member 22 and the mounting member 20;

[0087] The trimming member 24 is sleeved on the outer side of the forming member 22 , and the forming member 22 is slidably disposed relative to the trimming member 24 .

[0088] In this embodiment, the final upsetting female die 200 can be used in conjunction with the final upsetting male die 100, and can be used to connect and trim the blank 300 before forming such as short rivets in the cold upsetting die, and the blank 300 includes an end 310 to be trimmed. The first push rod 14 and the second push rod 16 of the final upsetting male die 100 are used to abut against the end 310 to be trimmed in the blank 300, and the third push rod 23 of the final upsetting female die 200 is used to abut against the other end of the blank 300. The forming part 22 can slide relative to the trimming part 24. When the left end face of the forming part 22 is flush with the left end face of the trimming part 24, the cavity is not a complete forming cavity 221. When the forming part 22 moves to the right by a predetermined distance, it forms a complete forming cavity 221 together with the inner wall of the trimming part 24. When the final upsetting male die 100 pushes the blank 300 until the end 310 to be trimmed abuts against the trimming piece 24, the material connection is completed. During trimming, the final upsetting male die 100 continues to push the blank 300 to cause the blank 300 to undergo plastic deformation, and the sharp trimming piece 24 trims the blank 300. At this time, the trimming residue 400 of the blank 300 remains between the trimming piece 24 and the first push rod 14 of the final upsetting male die 100, and the second push rod mounting piece 15 of the final upsetting male die 100 continues to squeeze the remaining blank 300 into the forming piece 22, so that the remaining blank 300 undergoes plastic deformation to obtain a formed product 500. Since the formed product 500 is cold-forged after trimming, the generation of burrs is reduced, and the concentricity can be controlled within 0.03mm.

[0089] See also Fig.17 As an optional embodiment, the third elastic member 21 is connected to the third push rod 23. The third elastic member 21 is also connected to the third push rod 23, so that when the third elastic member 21 is reset, it can drive the forming member 22 to reset and also drive the third push rod 23 to reset.

[0090] See also Fig.17As an optional embodiment, the molding device 2 also includes a fixed pad 25, which is connected to the left end of the mounting member 20 and has a third channel axially extending therethrough, which is adapted to the molding member 22. The molding member 22 can be slidably disposed in the third channel, and the fixed pad 25 is used to stably support the molding member 22.

[0091] See also Fig.17 As an optional embodiment, the left end of the fixed pad 25 is connected to the right end of the trimming piece 24 through a connecting pipe 26. The trimming piece 24 is fixed through the connecting pipe 26.

[0092] See also Fig.17 As an optional embodiment, the right end of the third push rod 23 is connected to a second push rod 27 , and the second push rod 27 can be used to push and pull the third push rod 23 .

[0093] See also Fig.17 As an optional embodiment, the final upsetting female mold 200 further includes: a female mold shell 28, the molding device 2 is arranged inside the female mold shell 28; a locking nut 29 is fixedly connected to the outer side of the mounting member 20, the locking thread is provided with an external thread, and the female mold shell 28 is provided with an internal thread adapted to the external thread; the female mold shell 28 is threadedly connected with the locking nut 29. The female mold shell 28 is fixed to the outer side of the mounting member 20 by the locking nut 29, and the female mold shell 28 can be used to protect the molding device 2.

[0094] The following is the implementation process of the final upsetting male die 100 of the above embodiment cooperating with the final upsetting female die 200 of the above embodiment to connect and trim the short rivet blank 300 and perform final upsetting forming:

[0095] Before trimming the blank 300, the material needs to be spliced. The process of splicing is as follows:

[0096] Step 1: Use the clamping mechanical arm to clamp the blank 300 to be final upsetting from the previous station and automatically transfer it to the center position between the final upsetting male die 100 and the final upsetting female die 200, and then push the first push rod 11 of the final upsetting male die 100, and the first push rod 11 pushes the entire ejection device 1 to move toward the final upsetting female die 200 until the end surface of the first push rod 14 and the end surface of the second push rod 16 press against the blank 300; at the same time, the second push rod 27 pushes the third push rod 23 to move toward the final upsetting male die 100 until it presses against the blank 300, and the clamping mechanical arm is released and returned to its position, at which time the first push rod 14, the second push rod 16 and the third push rod 23 jointly clamp the blank 300 (see Fig.30 );

[0097] Step 2: The first push rod 11 applies force in the direction of the blank 300. Under the reaction force of the blank 300, the first push rod 14 and the second push rod 16 compress the first elastic member 13 and the second elastic member 17 respectively until the end faces of the first push rod 14 and the second push rod 16 are flush with the end faces of the second push rod mounting member 15. At this time, the first push rod 14, the second push rod 16 and the second push rod mounting member 15 are all against the end faces of the blank 300; then, the first push rod 11 and the second push rod 27 move to the right at the same time, driving the blank 300 to move toward the final upsetting female die 200. During the movement of the third push rod 23 to the right, the third push rod 23 compresses the third elastic member 21 (see Fig.31 );

[0098] Step 3: When the end 310 of the blank 300 to be trimmed moves to abut against the trimming piece 24 of the final upsetting female die 200, the material connection is completed (see Fig.32 ).

[0099] The process of trimming is as follows:

[0100] Step 1: After the material connection is completed, the trimming thickness "H" is set, and the final upsetting male die 100 continues to apply a force to the final upsetting female die 200 that can cause the blank 300 to undergo plastic deformation. The second ejector mounting member 15 drives the second ejector 16 to continue to move rightward to push the forming member 22 of the final upsetting female die 200. The forming member 22 retreats to the right by the distance of the trimming thickness "H" to form a forming cavity 221. At the same time, the blank 300 is trimmed by the sharp incision of the trimming member 24 of the final upsetting female die 200. The trimming residue 400 of the blank 300 is clamped between the first ejector 14 and the trimming member 24. The remaining blank is pushed into the forming cavity 221 by the second ejector mounting member 15 and the second ejector 16. The remaining blank is cold-forged in the forming cavity 221 to undergo plastic deformation to obtain a formed short rivet 500 (see Fig.33 ).

[0101] The process of blanking is as follows:

[0102] Step 1: After the trimming is completed, the final upsetting male die 100 moves to the left and away from the final upsetting female die 200. At this time, the first ejector pin 14 is ejected to the right under the action of the restoring elastic force of the first elastic member 13, pushing the trimming residue 400 to fall; the third ejector pin 23 and the forming member 22 gradually push the formed short rivet 500 to the left under the action of the third elastic member 21. At this time, the second ejector pin mounting member 15, the second ejector pin 16 and the third ejector pin 23 jointly clamp the formed short rivet 500 until it is completely separated from the final upsetting female die 200. Since the first ejector pin 14 has been ejected to the right before the formed short rivet 500 is completely separated, the formed short rivet 500 may be embedded between the two first ejector pins 14 during the process of ejecting the formed short rivet 500 from the final upsetting female die 200 (see Fig.34After the formed short rivet 500 is completely separated from the final upsetting female die 200, the second ejector rod 16 is acted upon by the elastic force of the second elastic member 17, so that the second ejector rod 16 ejects the formed short rivet 500, and the blanking is completed (see Fig.35 ).

[0103] In summary, the final upsetting male die of the embodiment provided by the utility model is used in conjunction with the final upsetting female die, which can realize material connection and edge trimming during the cold upsetting process, simplify the process flow, and shorten the production cycle.

[0104] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A final upsetting male die, characterized in that: The invention comprises an ejection device, wherein the ejection device comprises: A push tube, the left end of which is connected to a first push rod along its axial direction, and a push rod is slidably arranged inside the push tube along its axial direction; a first elastic member is connected between the push rod and the first push rod; a first opening adapted to the first push rod is provided at the right end of the push tube; The left end of the first push rod can be slidably disposed inside the push tube and abut against the push rod, and the other end extends out of the first opening; A second push rod mounting member, one end of which abuts against the right end of the push tube, and the other end of which is provided with a second opening adapted to the second push rod; The left end of the second push rod can be slidably arranged inside the second push rod mounting member, and the other end extends out of the second opening; a second elastic member is connected between the second push rod and the second push rod mounting member.

2. The final upsetting male die according to claim 1, characterized in that: Two first push rods are provided, and two first openings are provided corresponding to the two first push rods; The second push rod mounting member is located between the two first push rods.

3. The final upsetting male die according to claim 1, characterized in that: The radial width of the left end of the first push rod is greater than the radial width of the first opening; The radial width of the left end of the second push rod is greater than the radial width of the second opening.

4. The final upsetting male die according to claim 1, characterized in that: Also included is a male mold shell having an inner cavity; The ejection device is arranged in the inner cavity, and the left end of the male mold shell is provided with a third opening adapted to the push tube, and the right end thereof is provided with a fourth opening adapted to the first ejector rod and a fifth opening adapted to the second ejector rod mounting member; the radial width of the left end of the second ejector rod mounting member is greater than the radial width of the fifth opening.

5. A final upsetting female die, used in conjunction with the final upsetting male die according to any one of claims 1 to 4, characterized in that: The invention comprises a forming device, wherein the forming device comprises: The mounting member has a mounting cavity at its axial left end and a first passage adapted to the third push rod extending therethrough along its axial direction; a third elastic member is disposed in the mounting cavity; A molding part, a molding cavity is formed at its left end, and a second channel adapted to the third ejector rod is opened through the molding part along its axial direction, and the second channel is coaxially arranged with the first channel; The left end of the third push rod can be slidably disposed in the first channel and the second channel; The third elastic member is disposed between the forming member and the mounting member; The trimming piece is sleeved on the outer side of the forming piece, and the forming piece is slidably arranged relative to the trimming piece.

6. The final upsetting female die according to claim 5, characterized in that: The third elastic member is connected to the third push rod.

7. The final upsetting female die according to claim 5, characterized in that: The molding device also includes a fixed cushion block connected to the left end of the mounting member and having a third passage matching the molding member penetrating the fixed cushion block along its axial direction.

8. The final upsetting female die according to claim 7, characterized in that: The left end of the fixed cushion block is connected to the right end of the trimming piece through a connecting pipe.

9. The final upsetting female die according to claim 5, characterized in that: The right end of the third push rod is connected with a second push rod.

10. The final upsetting female die according to claim 5, characterized in that: Also includes: A female mold shell, wherein the molding device is arranged inside the female mold shell; A locking nut is fixedly connected to the outer side of the mounting member, the locking nut is provided with an external thread, and the female mold shell is provided with an internal thread matched with the external thread; the female mold shell is threadedly connected to the locking nut.

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