Leaf spring stamping die

Abstract

The utility model discloses a plate spring punch press die, including upper die and lower die, upper die includes upper seat board, stripping board, punch nest male die and the punch nest male die one side's punch male die of being located, stripping board is located the below of upper seat board and is connected with upper seat board sliding, and the spring of mutual resistance is connected between stripping board and upper seat board, punch nest male die and punch male die fixed connection on upper seat board and its lower end passes stripping board downward, lower die includes lower seat board and the female die plate fixed in the top surface of lower seat board, and the top surface of female die plate is recessed with punch nest female die and punch male die cooperation punch nest female die, and punch male die cooperation punch female die, and the bottom surface of lower seat board is provided with lower blanking hole to the upper blanking hole of punch female die correspondence, and lower blanking hole with the upper blanking hole intercommunication. Through this structural design, realize one die multiple processes, thereby improve the processing accuracy, and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically to a leaf spring stamping die. Background Technology

[0002] During the production of leaf springs, a recess needs to be machined, and a through hole needs to be made in the recess. The recess is formed by stamping with a stamping die. Existing stamping dies include an upper die and a lower die located below the upper die. The upper die includes an upper seat plate, a stripper plate, and a punch. The upper seat plate is mounted on the die head of the stamping press. The stripper plate is slidably connected to the lower part of the upper seat plate. One end of the punch is fixed to the upper seat plate, and the other end passes downward through the stripper plate and can slide relative to the stripper plate. The lower die includes a lower seat plate located below the upper seat plate and a die plate. The lower seat plate is fixed to the worktable of the press. The die plate is fixed to the top surface of the lower seat plate, and its top surface is recessed downward corresponding to the punch to form a die cavity. The die cavity and the punch cooperate. When the leaf spring is stamped to process the recess, the upper and lower dies close, so that the die cavity and the punch stamp to form the recess (cover) of the leaf spring. After the recess is processed, the leaf spring with the processed recess needs to be transported to a drilling machine. Then, the drilling machine drills a through hole in the center of the recess, thereby completing the processing of the recess and the through hole of the leaf spring. However, the concentricity of the through hole and the recess processed in the above-mentioned leaf spring is low, that is, the processing accuracy is low. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a leaf spring stamping die that forms the recess and through hole in the recess by setting a punching punch and a piercing punch in the upper die, and a punching die that cooperates with the punching punch and a piercing die that cooperates with the piercing punch in the lower die, thereby improving both processing accuracy and production efficiency.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: A leaf spring stamping die, comprising an upper die and a lower die located below the upper die; The upper die includes an upper base plate, a stripper plate, a punching punch, and a punching punch located on one side of the punching punch. The stripper plate is located below the upper base plate and is slidably connected to the upper base plate. A spring is connected between the stripper plate and the upper base plate to resist both of them. The punching punch and the punching punch are fixedly connected to the upper base plate and their lower ends pass downward through the stripper plate. The lower die includes a lower base plate and a concave template fixed to the top surface of the lower base plate. The top surface of the concave template is recessed with a punching die that cooperates with the punching punch and a punching die that cooperates with the punching punch. The bottom surface of the lower base plate is provided with a lower blanking hole that is opened upwards corresponding to the upper blanking hole of the punching die. The lower blanking hole is connected to the upper blanking hole.

[0005] Furthermore, a first connector and a second connector are respectively fixed to the bottom of the punching die and the piercing die. A first punch is fixed to the bottom of the first connector and the first punch cooperates with the punching die. A second punch is fixed to the bottom of the second connector and the second punch cooperates with the piercing die.

[0006] Furthermore, the top surface of the first connector is recessed downward to form a first groove, which is threadedly connected to the lower end of the punching punch. The top surface of the second connector is recessed downward to form a second groove, which is threadedly connected to the lower end of the punching punch.

[0007] Furthermore, the bottom surface of the first groove is provided with a first through hole penetrating the bottom surface of the first connector, and the bottom surface of the second groove is provided with a second through hole penetrating the bottom surface of the second connector; the upper end of the first punch engages with the first through hole, and the lower end passes downward through the bottom surface of the first connector; the upper end of the second punch engages with the second through hole, and the lower end passes downward through the bottom surface of the second connector.

[0008] Furthermore, the first punch protrudes upward from the bottom surface of the first groove and holds against the bottom surface of the punching die, while the second punch protrudes upward from the bottom surface of the second groove and abuts against the bottom surface of the punching die.

[0009] Furthermore, the bottom surface of the first punch extends downwards integrally to form a spike.

[0010] Furthermore, the top surface of the concave template is provided with a first fixing hole and a second fixing hole respectively corresponding to the punching punch and the piercing punch. A first insert is embedded in the first fixing hole, and the top surface of the first insert is recessed downward to form the punching die. A second insert is embedded in the second fixing hole, and the top surface of the second insert is recessed downward to form the piercing die.

[0011] Furthermore, the inner bottom wall of the second fixing hole is provided with an upper blanking hole that penetrates the bottom surface of the die plate. The upper blanking hole is connected to the punching die and its diameter is smaller than the diameter of the second fixing hole.

[0012] Furthermore, the bottom surface of the upper seat plate is provided with a plurality of upper mounting holes, the stripper plate is slidably connected to the upper seat plate by bolts, and its top surface is provided with a lower mounting hole corresponding to each of the upper mounting holes. The two ends of the spring are respectively fitted into the corresponding upper mounting hole and the lower mounting hole.

[0013] Furthermore, the bottom surface of the lower seat plate is provided with a lower blanking hole facing upwards corresponding to the punching die. The lower blanking hole is connected to the first fixing hole. The two outer side walls of the lower seat plate are respectively provided with a limiting hole. The two limiting holes correspond to the punching die and the punching die respectively and extend to the punching die and the punching die respectively. A screw is provided in one of the limiting holes. The two screws abut against the punching die and the punching die respectively.

[0014] This utility model's leaf spring stamping die forms the recess and through hole in the leaf spring by setting a recess punch and a hole punch in the upper die, and a recess die that cooperates with the recess punch and a hole punch die that cooperates with the hole punch in the lower die. In other words, the leaf spring stamping die can process the recess and through hole of the leaf spring, realizing multiple processes in one die. On the one hand, the concentricity between the through hole and the recess of the leaf spring is high. On the other hand, it is not necessary to transport the leaf spring with the processed recess to a drilling machine for drilling, thereby improving both processing accuracy and production efficiency. Attached Figure Description

[0015] Figure 1 This is a partial three-dimensional exploded view of the leaf spring stamping die according to an embodiment of the present utility model; Figure 2 for Figure 1 A combination diagram; Figure 3 for Figure 2 A sectional view; Figure 4 for Figure 3 A magnified view of part A. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figures 1 to 4 As shown, this utility model embodiment provides a leaf spring stamping die for stamping leaf springs (not shown), including an upper die 1 and a lower die 2 located below the upper die 1.

[0017] like Figure 1 , Figure 2As shown, the upper die 1 includes an upper seat plate 11, a stripper plate 12, a punching punch 13, and a punching punch 14 located on one side of the punching punch 13. The upper seat plate 11 is fixed to the head of the press (not shown) and its bottom surface has multiple upper mounting holes (not shown). The stripper plate 12 is located below the upper seat plate 11 and is slidably connected to the upper seat plate 11. Specifically, the stripper plate 12 is slidably connected to the upper seat plate 11 by bolts (not labeled), and its top surface has a lower mounting hole (not shown) corresponding to each upper mounting hole. The upper end of the bolt is slidably engaged with the sliding hole of the upper seat plate 11, and the lower end of the bolt is threadedly connected to the stripper plate 12, so that the stripper plate 12 can slide relative to the upper seat plate 11. A spring 15 is connected between the stripper plate 12 and the upper seat plate 11 to resist both. The spring 15 is used to reset the stripper plate 12, and there are multiple springs. The two ends of the spring 15 are respectively engaged in a corresponding upper mounting hole and a lower mounting hole. The punching punch 13 and the piercing punch 14 are fixedly connected to the upper base plate 11 and their lower ends pass downward through the stripper plate 12 (e.g. Figure 3 As shown in the figure, specifically, the punching punch 13 and the piercing punch 14 are located in the middle of the upper die 1 plate and are arranged side by side, and are offset from the spring 15.

[0018] like Figure 3 , Figure 4 As shown, the lower die 2 includes a lower base plate 21 and a concave die plate 22 fixed to the top surface of the lower base plate 21. The lower base plate 21 is fixed on the worktable of the stamping machine (not shown). The top surface of the concave die plate 22 is recessed with a punching die 23 that cooperates with the punching punch 13 and a punching die 24 that cooperates with the punching punch 14. That is, the punching die 23 and the punching punch 13 form a punching station for forming the recess of the leaf spring, and the punching die 24 and the punching punch 14 form a punching station for forming the through hole of the recess. The bottom surface of the lower base plate 21 also has a lower blanking hole 212 opening upwards corresponding to the upper blanking hole 231 of the punching die 24. The lower blanking hole 212 is connected to the upper blanking hole 231. When stamping leaf springs, the leaf spring is first placed on the punching die 23. Then, the upper die 1 and the lower die 2 close, forming the recess of the leaf spring at the punching station. When the recess is formed, the die is opened, and the leaf spring with the formed recess is moved to the punching die 24. Then, the die is closed, forming the through hole on the recess at the punching station. This allows the leaf spring stamping die to process both the recess and the through hole of the leaf spring, achieving multiple processes in one die. On the one hand, the concentricity between the through hole and the recess of the leaf spring is high. On the other hand, it is not necessary to transport the leaf spring with the processed recess to a drilling machine for drilling, thereby improving both processing accuracy and production efficiency.

[0019] like Figure 3 , Figure 4As shown, for ease of maintenance and replacement, a first connecting member 131 and a second connecting member 141 are fixed to the bottom of the punching die 13 and the punching die 14, respectively. A first punch 132 is fixed to the bottom of the first connecting member 131 and engages with the punching die 23. A second punch 143 is fixed to the bottom of the second connecting member 141 and engages with the punching die 24. Specifically, a first groove 1311 is recessed downward on the top surface of the first connecting member 131 and is threadedly connected to the lower end of the punching die 13. A second groove 142 is recessed downward on the top surface of the second connecting member 141 and is threadedly connected to the lower end of the punching die 14. To improve forming accuracy, a spike 1321 is integrally extended downward from the center of the bottom surface of the first punch 132. During stamping, the spike 1321 can pre-press and position the leaf spring, so that the leaf spring is accurately positioned, thereby improving forming accuracy.

[0020] like Figure 3 , Figure 4 As shown, to simplify the structure, in this embodiment, the bottom surface of the first groove 1311 is provided with a first through hole 1312 penetrating the bottom surface of the first connector 131, and the bottom surface of the second groove 142 is provided with a second through hole 1421 penetrating the bottom surface of the second connector 141. The upper end of the first punch 132 mates with the first through hole 1312. Specifically, the upper end of the first punch 132 protrudes upward from the bottom surface of the first groove 1311 and holds against the bottom surface of the punching die 13, so that... The punch 13 restricts the upward movement of the first punch 132, and the lower end of the first punch 132 passes downward through the bottom surface of the first connector 131; the upper end of the second punch 143 engages with the second through hole 1421. Specifically, the upper end of the second punch 143 protrudes upward from the bottom surface of the second groove 142 and abuts against the bottom surface of the punch 14, so that the punch 14 restricts the upward movement of the second punch 143, and the lower end of the second punch 143 passes downward through the bottom surface of the second connector 141.

[0021] like Figure 3 , Figure 4As shown, to facilitate maintenance, replacement, and mold modification, a first fixing hole 221 and a second fixing hole 222 are respectively provided downward on the top surface of the concave template 22 corresponding to the punching punch 13 and the piercing punch 14. A first insert 230 is embedded in the first fixing hole 221, and the top surface of the first insert 230 is recessed downward to form the punching die 23. A second insert 240 is embedded in the second fixing hole 222, and the top surface of the second insert 240 is recessed downward to form the piercing die 24. An upper blanking hole 231 is provided downward through the bottom surface of the concave template 22 on the inner bottom wall of the second fixing hole 222. The upper blanking hole 231 is connected to the piercing die 24 and its diameter is smaller than the diameter of the second fixing hole 222 so that the concave template 22 forms a stepped portion at the second fixing hole 222 to support the second insert 240.

[0022] like Figure 3 , Figure 4 As shown, to facilitate mold modification, a lower blanking hole 212 is provided on the bottom surface of the lower base plate 21 corresponding to the punching die 23. The lower blanking hole 212 is connected to the first fixing hole 221, so that the punching station can be changed to the punching station (blanking station), further reducing costs. A limiting hole 213 is provided inward on each of the two outer side walls of the lower base plate 21. The two limiting holes 213 correspond to the punching die 23 and the punching die 24 respectively and extend to the punching die 23 and the punching die 24 respectively. A screw (not shown) is provided in one limiting hole 213. The two screws abut against the punching die 23 and the punching die 24 respectively to radially limit the punching die 23 and the punching die 24, further improving the stability of positioning.

[0023] This utility model's leaf spring stamping die forms the recess and through hole in the leaf spring by setting a recess punch and a hole punch in the upper die, and a recess die that cooperates with the recess punch and a hole punch die that cooperates with the hole punch in the lower die. In other words, the leaf spring stamping die can process the recess and through hole of the leaf spring, realizing multiple processes in one die. On the one hand, the concentricity between the through hole and the recess of the leaf spring is high. On the other hand, it is not necessary to transport the leaf spring with the processed recess to a drilling machine for drilling, thereby improving both processing accuracy and production efficiency.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A leaf spring stamping die, characterized in that, Includes an upper mold and a lower mold located below the upper mold; The upper die includes an upper base plate, a stripper plate, a punching punch, and a punching punch located on one side of the punching punch. The stripper plate is located below the upper base plate and is slidably connected to the upper base plate. A spring is connected between the stripper plate and the upper base plate to resist both of them. The punching punch and the punching punch are fixedly connected to the upper base plate and their lower ends pass downward through the stripper plate. The lower die includes a lower base plate and a concave template fixed to the top surface of the lower base plate. The top surface of the concave template is recessed with a punching die that cooperates with the punching punch and a punching die that cooperates with the punching punch. The bottom surface of the lower base plate is provided with a lower blanking hole that is opened upwards corresponding to the upper blanking hole of the punching die. The lower blanking hole is connected to the upper blanking hole.

2. The leaf spring stamping die as described in claim 1, characterized in that, The bottom of the denting die and the punching die are respectively fixed with a first connector and a second connector. The bottom of the first connector is fixed with a first punch, which cooperates with the denting die. The bottom of the second connector is fixed with a second punch, which cooperates with the punching die.

3. The leaf spring stamping die as described in claim 2, characterized in that, The top surface of the first connector is recessed downward to form a first groove, which is threaded to the lower end of the punch. The top surface of the second connector is recessed downward to form a second groove, which is threaded to the lower end of the punch.

4. The leaf spring stamping die as described in claim 3, characterized in that, The bottom surface of the first groove is provided with a first through hole penetrating the bottom surface of the first connector, and the bottom surface of the second groove is provided with a second through hole penetrating the bottom surface of the second connector; the upper end of the first punch engages with the first through hole, and the lower end passes downward through the bottom surface of the first connector; the upper end of the second punch engages with the second through hole, and the lower end passes downward through the bottom surface of the second connector.

5. The leaf spring stamping die as described in claim 3, characterized in that, The first punch protrudes upward from the bottom surface of the first groove and holds against the bottom surface of the punching die; the second punch protrudes upward from the bottom surface of the second groove and abuts against the bottom surface of the punching die.

6. The leaf spring stamping die as described in claim 2, characterized in that, The bottom surface of the first punch extends downwards to form a spike.

7. The leaf spring stamping die as described in claim 1, characterized in that, The top surface of the concave template is provided with a first fixing hole and a second fixing hole respectively, corresponding to the punching punch and the piercing punch. A first insert is embedded in the first fixing hole, and the top surface of the first insert is recessed downward to form the punching die. A second insert is embedded in the second fixing hole, and the top surface of the second insert is recessed downward to form the piercing die.

8. The leaf spring stamping die as described in claim 7, characterized in that, The inner bottom wall of the second fixing hole has an upper blanking hole that penetrates the bottom surface of the die plate. The upper blanking hole is connected to the punching die and its diameter is smaller than that of the second fixing hole.

9. The leaf spring stamping die as described in claim 1, characterized in that, The bottom surface of the upper seat plate has multiple upper mounting holes facing upwards. The stripper plate is slidably connected to the upper seat plate by bolts, and its top surface has a lower mounting hole facing downwards corresponding to each of the upper mounting holes. The two ends of the spring are respectively fitted into the corresponding upper mounting hole and the lower mounting hole.

10. The leaf spring stamping die as described in claim 1, characterized in that, The bottom surface of the lower base plate has a lower blanking hole facing upwards corresponding to the punching die. The lower blanking hole is connected to the first fixing hole. The two outer side walls of the lower base plate each have a limiting hole facing inwards. The two limiting holes correspond to the punching die and the punching die respectively and extend to the punching die and the punching die respectively. A screw is provided in one of the limiting holes, and the two screws abut against the punching die and the punching die respectively.

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