Stamping die capable of controlling punch to stretch out and draw back to punch conductive terminals at intervals

Abstract

The stamping die capable of controlling the punches to stretch and retract to punch the conductive terminals at intervals comprises an upper die base, a lower die base and the punches, the upper die base is downwards connected with a punch base plate, the punch base plate is downwards connected with a punch fixing plate, a gear fixing base is arranged on the rear side of the middle of the punch fixing plate, a gear is connected to the gear fixing base, and a gear stop block is arranged on the left side of the gear. A gear shifting block is arranged on the right side of the gear. The lower side of the gear makes contact with the top of the punch ejecting block. The left end of the gear shifting block makes contact with the right side of the gear. The right side end part of the gear stop block is in contact with the left side of the gear; when the gear rotates until the teeth are in contact with the punch top block, the bottom end of the punch punches the material, and when the gear rotates until the tooth grooves are in contact with the punch top block, the punch cannot punch the material. Therefore, the punching head punches the material at intervals, the requirement that the conductive terminal with the small size can be machined on the material belt through interval punching can be met, and the strength of the conductive terminal with the small specification is not affected after punching machining.

Description

Technical Field

[0001] The utility model relates to the field of conductive terminal processing equipment, in particular to a punching die capable of controlling the expansion and contraction interval of a punch and punching a conductive terminal. Background Art

[0002] During the stamping process of the conductive terminal, after the material strip is sent to the mold, the upper mold and the lower mold are closed to stamp the material strip, and the punch is generally fixed on the upper mold or the lower mold. Under the drive of the drive device, the upper mold and the lower mold are closed each time, and the material strip will be punched and cut once, that is, the conductive terminal is processed by continuous punching and cutting of the material strip. Figure 1 As shown, when the upper die base 1 and the lower die base 2 are closed for the first time, the punch 2 is pressed down to the bottom dead center, and the material strip is punched at this time. When the punching is completed, as shown in Figure 2 As shown, the upper die base 1 and the lower die base 2 are separated for the first time, and the punch 3 moves up to the top dead center. At this time, the material strip moves forward for a certain length and pushes the punched conductive terminal out from between the upper die and the lower die. Then, the upper die base 1 and the lower die base 2 are closed for the second time. Figure 3 As shown, the punch 3 is pressed down for the second time at the bottom dead center, and the material strip is punched again. When the punching is completed, as shown in FIG. Figure 4 As shown, the upper die base 1 and the lower die base 2 are separated for the second time, and the punch 3 moves up to the top dead center, and so on, in a reciprocating cycle. However, the above-mentioned punching processing method is only suitable for processing larger conductive terminals. If smaller conductive terminals are processed, it is not only easy to break the conductive terminals, but also affects the subsequent processing. With the development of diversification and miniaturization of conductive terminals, in actual processing, some smaller conductive terminals need to be punched at intervals on the material strip to complete the processing, and the current stamping die cannot adjust the punch so that it can meet the interval punching, which also affects the punching processing needs for these smaller conductive terminals.

[0003] In view of this, the inventor conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Utility Model Content

[0004] In order to solve the above technical problems, we proposed a stamping die that can control the expansion and contraction of the punch to punch the conductive terminals at intervals, so as to meet the requirements of some smaller conductive terminals that can only be processed by punching at intervals on the material strip, and the strength of these smaller conductive terminals will not be affected after the punching process.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] A stamping die capable of controlling the expansion and contraction interval of a punch to punch and cut a conductive terminal comprises an upper die seat, a lower die seat and a punch, wherein the upper die seat is arranged at the top of the stamping die, and a punch pad is connected downwardly to the front side of the upper die seat, a punch pad is connected downwardly to a punch fixing plate, a discharge pad is arranged below the punch fixing plate, and the discharge pad is connected downwardly to a discharge fixing plate; the lower die seat is arranged at the bottom of the stamping die, a die pad is connected upwardly to the lower die seat, and a die fixing plate is connected upwardly to the die pad;

[0007] A gear fixing seat is provided on the rear side of the middle part of the punch fixing plate, and a gear is connected to the gear fixing seat, a gear stop block is provided on the left side of the gear, and a gear shift block is provided on the right side of the gear, and the lower side of the gear contacts the top of the punch top block; an upper blind hole opening downward is provided near the right side of the middle part of the upper die seat, an upper spring is provided in the upper blind hole, a push rod is connected to the lower end of the upper spring, and a pressure block is connected to the bottom end of the push rod, a right blind hole opening to the left is provided in the middle part of the left side of the pressure block, a right spring is provided in the right blind hole, the left side of the right spring is connected to the right side of the gear shift block, and the left end portion of the gear shift block contacts the right side of the gear; a left blind hole opening to the right is provided in the middle part of the right side of the gear fixing seat, a left spring is provided in the left blind hole, the right side of the left spring is connected to the left side of the gear stop block, and the right end portion of the gear stop block contacts the left side of the gear;

[0008] A fixing hole is provided in the middle of the unloading fixing plate below the gear, the middle and lower part of the punch top block is embedded in the upper part of the fixing hole, a lower spring is provided in the lower part of the fixing hole, and the top end of the lower spring is connected to the bottom end of the punch top block, and a punch accommodating through hole is also provided downwardly in the middle of the bottom surface of the fixing hole, the punch accommodating through hole passes through the unloading fixing plate, and the upper part of the punch passes through the middle of the lower spring and the top end of the punch is connected to the middle of the bottom of the punch top block, and the lower part of the punch is located in the punch accommodating through hole, and the bottom end of the punch can come out of the punch accommodating through hole after being subjected to top pressure from above to punch and cut the material on the die fixing plate.

[0009] Preferably, a stop block B is connected to the bottom end of the pressing block; a stop block A is provided on the right side of the middle part of the die fixing plate, and the stop block A is located below the stop block B, and can fix the die fixing plate and the unloading fixing plate by the bottom of the stop block B being stuck on the top of the stop block A when the upper die base and the lower die base are closed.

[0010] Preferably, a horizontal waist-shaped hole is opened in the left-right direction on the upper part of the punch top block, and a horizontal pin is provided in the left-right direction between the two side walls of the upper part of the fixing hole. The horizontal pin is inserted into the horizontal waist-shaped hole of the punch top block and enables the punch top block to move up and down.

[0011] Preferably, a circle of cylindrical protrusions is evenly arranged and fixed on the inner circumference of the rear end surface of the gear, and a gap is left between two adjacent cylindrical protrusions.

[0012] Preferably, the left end of the gear shift block is provided with a downwardly inclined duckbill-shaped shift head, and when the gear shift block shifts the gear, the duckbill-shaped shift head of the gear shift block is inserted between the two cylindrical protrusions on the right side of the gear, and the duckbill mouth of the duckbill-shaped shift head is clamped on the lower cylindrical protrusion.

[0013] Preferably, the right end of the gear stop block is provided with an upwardly inclined duckbill stop head, and when the gear stop block stops the gear, the duckbill stop head of the gear stop block is inserted between the two cylindrical protrusions on the left side of the gear, and the duckbill mouth of the duckbill stop head is clamped on the upper cylindrical protrusion.

[0014] Through the above technical scheme, the utility model provides a gear fixing seat on the rear side of the middle part of the punch fixing plate, the gear fixing seat is connected to the gear, a gear stop block is provided on the left side of the gear, a gear shift block is provided on the right side of the gear, and the lower side of the gear contacts the top of the punch top block; a push rod is provided near the lower right side of the middle part of the upper die seat, a pressure block is connected to the bottom end of the push rod, a gear shift block is provided in the middle part of the left side of the pressure block, and the left end of the gear shift block contacts the right side of the gear; a gear stop block is provided on the right side of the gear fixing seat, and the right end of the gear stop block contacts the left side of the gear; a fixing hole is provided in the middle part of the unloading fixing plate below the gear, the lower and middle part of the punch top block is embedded in the upper part of the fixing hole, a lower spring is provided at the lower part of the fixing hole, and the top of the lower spring is contacted with the punch top block The bottom end is connected, and a punch accommodating through hole is provided downwardly in the middle of the bottom surface of the fixing hole. The punch accommodating through hole passes through the unloading fixing plate. After the upper part of the punch passes through the middle of the lower spring, its top end is connected to the middle of the bottom of the punch top block, and the lower part of the punch is located in the punch accommodating through hole. Since the teeth and tooth grooves on the gear are distributed at intervals, when the gear rotates to the point where the teeth on the gear contact the punch top block, the punch is pressed by the teeth on the upper gear and the bottom end of the punch comes out from the punch accommodating through hole to punch and cut the material on the die fixing plate. When the gear rotates to the point where the tooth groove on the gear contacts the punch top block, the punch is pulled by the upper lower spring and the bottom end of the punch retracts into the accommodating through hole and cannot punch and cut the material on the die fixing plate. This means that the punch punches the material at intervals, which can meet the needs of processing some smaller conductive terminals that need to be punched at intervals on the material strip. The punching process does not affect the strength and quality of these smaller conductive terminals, and it is not easy to break the conductive terminals, and it can also adapt to subsequent processing steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a state diagram of the conductive terminal stamping die in the prior art when the upper die and the lower die are pressed down for the first time and are at the bottom dead center;

[0017] Figure 2 It is a state diagram of the conductive terminal stamping die in the prior art when the upper die and the lower die are separated and the punch moves up for the first time and is at the top dead center;

[0018] Figure 3 It is a state diagram of the conductive terminal stamping die in the prior art when the upper die and the lower die clamping punch are pressed down for the second time and are at the bottom dead center;

[0019] Figure 4 It is a state diagram of the conductive terminal stamping die in the prior art when the upper die and the lower die are separated and the punch moves up for the second time and is at the top dead center;

[0020] Figure 5 This is a state diagram of a punching die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal in this embodiment when the upper die and the lower die are closed and the punch is pressed down for the first time and is at the bottom dead center;

[0021] Figure 6 This is a state diagram of a stamping die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal in this embodiment when the upper die and the lower die are separated and the punch moves up for the first time and is at the top dead center;

[0022] Figure 7 This is a state diagram of a punching die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal in this embodiment when the upper die and the lower die are combined and the punch is pressed down for the second time and is at the bottom dead center;

[0023] Figure 8 This is a state diagram of a stamping die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal in this embodiment when the upper die and the lower die are separated and the punch moves up for the second time and is at the top dead center;

[0024] Fig. 9 This is a state diagram of a punching die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal in this embodiment when the upper die and the lower die are closed and the punch is pressed down for the third time and is at the bottom dead center;

[0025] Fig.10 This is a front view of a gear shifting block in a stamping die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal according to the present embodiment;

[0026] Fig.11 This is a front view of a gear stop block in a stamping die capable of controlling the expansion and contraction interval of a punch to punch out a conductive terminal according to this embodiment.

[0027] The numbers in the figure represent the corresponding parts names:

[0028] 1. Upper die base 2. Lower die base 3. Punch 4. Punch pad 5. Punch fixing plate 51. Gear fixing base 52. Gear 53. Gear stop block 531. Duckbill stop head 54. Gear shift block 541. Duckbill shift head 6. Unloading pad 7. Unloading fixing plate 8. Die pad 9. Die fixing plate 10. Punch top block 11. Upper spring 12. Ejector 13. Press block 14. Right spring 15. Left spring 16. Lower spring 17. B stop block 18. A stop block 19. Horizontal pin 20. Cylindrical bump 21. Duckbill mouth DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The utility model is further described in detail below in conjunction with embodiments and specific implementation methods.

[0031] Example

[0032] like Figure 5-11 As shown, a stamping die capable of controlling the expansion and contraction interval of a punch to punch and cut a conductive terminal comprises an upper die base 1, a lower die base 2 and a punch 3, wherein the upper die base 1 is arranged at the top of the stamping die, and a punch pad 4 is connected downwardly to the front side of the upper die base 1, and a punch fixing plate 5 is connected downwardly to the punch pad 4, and a discharge pad 6 is arranged below the punch fixing plate 5, and a discharge pad 6 is connected downwardly to a discharge fixing plate 7; the lower die base 2 is arranged at the bottom of the stamping die, and a die pad 8 is connected upwardly to the lower die base 2, and a die fixing plate 9 is connected upwardly to the die pad 8;

[0033] A gear fixing seat 51 is provided at the rear side of the middle of the punch fixing plate 5, and a gear 52 is connected to the gear fixing seat 5. A gear stop block 53 is provided on the left side of the gear 52, and a gear shift block 54 is provided on the right side of the gear 52. The lower side of the gear 52 contacts the top of the punch ejector block 10; an upper blind hole opening downward is provided near the right side of the middle of the upper die seat 1, and an upper spring 11 is provided in the upper blind hole. The lower end of the upper spring 11 is connected to a push rod 12, and the bottom end of the push rod 12 is connected to a pressure block 13 A right blind hole opening to the left is provided in the middle of the left side of the pressing block 13, a right spring 14 is provided in the right blind hole, the left side of the right spring 14 is connected to the right side of the gear shift block 54, and the left end of the gear shift block 54 contacts the right side of the gear 52; a left blind hole opening to the right is provided in the middle of the right side of the gear fixing seat 51, a left spring 15 is provided in the left blind hole, the right side of the left spring 15 is connected to the left side of the gear stop block 53, and the right end of the gear stop block 53 contacts the left side of the gear 52;

[0034] A fixing hole is provided in the middle of the unloading fixing plate 7 below the gear 52, and the lower middle part of the punch top block is embedded in the upper part of the fixing hole, and a lower spring 16 is provided in the lower part of the fixing hole, and the top end of the lower spring 16 is connected to the bottom end of the punch top block 10, and a punch accommodating through hole is also provided downwardly in the middle of the bottom surface of the fixing hole, and the punch accommodating through hole passes through the unloading fixing plate 7, and the upper part of the punch 3 passes through the middle of the lower spring 16, and its top end is connected to the middle of the bottom of the punch top block 10, and the lower part of the punch 3 is located in the punch accommodating through hole, and the bottom end of the punch 3 can come out of the punch accommodating through hole after being subjected to top pressure from above to punch and cut the material on the die fixing plate 9.

[0035] In order to enable the upper die base 1 and the lower die base 2 to drive the related parts to close the mold more accurately and to further prevent micro-movement after closing the mold, the bottom end of the pressing block 13 is connected to a B stop block 17; an A stop block 18 is provided on the right side of the middle of the die fixing plate 9, and the A stop block 18 is located below the B stop block 17, and when the upper die base 1 and the lower die base 2 are closed, the bottom of the B stop block 17 can be stuck on the top of the A stop block 18 to fix the die fixing plate 9 and the unloading fixing plate 7.

[0036] Among them, a horizontal waist-shaped hole is opened in the left-right direction on the upper part of the punch top block 10, and a horizontal pin 19 is arranged between the two side walls of the upper part of the fixing hole in the left-right direction. The horizontal pin 19 is inserted into the horizontal waist-shaped hole of the punch top block 10 and enables the punch top block 10 to move up and down. In this way, the horizontal pin 19 can not only prop up the punch top block 10 in the fixing hole, but also does not affect the up and down movement of the punch top block 10 to a certain extent.

[0037] At the same time, a circle of cylindrical protrusions 20 are evenly arranged and fixed on the inner circumference of the rear end surface of the gear 52, and a gap is left between two adjacent cylindrical protrusions 20. The left end of the gear shift block 54 is provided with a downwardly inclined duckbill-shaped shifting head 541, and when the gear shift block 54 shifts the gear 52, the duckbill-shaped shifting head 541 of the gear shift block 54 is inserted between the two cylindrical protrusions 20 on the right side of the gear 52, and the duckbill mouth 21 of the duckbill-shaped shifting head 541 is clamped on the lower cylindrical protrusion 20.

[0038] In addition, the right end of the gear stop block 53 is provided with an upwardly inclined duckbill stop head 531, and when the gear stop block 53 stops the gear 52, the duckbill stop head 531 of the gear stop block 53 is inserted between the two cylindrical protrusions 20 on the left side of the gear 52, and the duckbill mouth 21 of the duckbill stop head 531 is clamped on the upper cylindrical protrusion 20.

[0039] When the stamping die capable of controlling the expansion and contraction interval of the punch to punch the conductive terminal is used to process the conductive terminal, the gear shift block 54 and the gear stop block 53 are used to control the rotation of the gear 52 to control whether the punch 3 can punch the material. Figure 5 As shown, when the gear shift block 54 and the gear stop block 53 control the gear 52 to rotate until the teeth contact the top of the punch top block 10, that is, when the punch 3 is at the bottom dead center for the first time, the A stop block 18 and the B stop block 17 are in a closed state, the lower spring 16 is in a compressed state, and the top of the B stop block 17 is tightly attached to the top of the punch fixing plate 5. At this time, the punch top block 10 can press the punch 3 downward to cut the material.

[0040] like Figure 6 As shown, when the gear shift block 54 and the gear stop block 53 control the gear 52 to rotate until the tooth groove contacts the top of the punch top block 10, that is, when the punch 3 is at the top dead center for the first time, the A stop block 18 and the B stop block 17 are separated, and the lower spring 16 is in a relaxed state. Through the upward pressure of the punch top block 10, the gear shift block 54 moves to the left under the action of the right spring 14 and shifts the cylindrical protrusion 20 below the gear 52 shift block to move downward. Similarly, at this time, the gear stop block 53 moves to the right under the action of the left spring 15 and shifts the cylindrical protrusion 20 above the gear 52 shift block to move upward to prevent it from moving downward, and the punch 3 cannot punch and cut the material. Thereby, the rotation of the gear 52 is realized, and the position conversion of the teeth and tooth grooves of the gear 52 is realized.

[0041] like Figure 7 and Fig. 9 As shown, as the gear 52 rotates, the punch 3 is at the bottom dead center for the second time and the third time. Figure 5 The above description will not be repeated here. Figure 8As shown, the situation when the punch 3 is at the top dead center for the second time is the same as above. Figure 6 The above steps will not be described in detail here. The material can be punched and cut at intervals to form conductive terminals by repeating this process repeatedly.

[0042] In this example, the utility model is provided with a gear fixing seat 51 at the rear side of the middle part of the punch fixing plate 5, a gear 52 is connected to the gear fixing seat 51, a gear stop block 53 is provided on the left side of the gear 52, a gear shift block 54 is provided on the right side of the gear 52, and the lower side of the gear 52 contacts the top of the punch top block 10; a push rod 12 is provided at the lower right side of the middle part of the upper die seat 1, a pressure block 13 is connected to the bottom end of the push rod 12, a gear shift block 54 is provided in the middle part of the left side of the pressure block 13, and the left end of the gear shift block 54 contacts the right side of the gear 52; a gear stop block 53 is provided on the right side of the gear fixing seat 51, and the right end of the gear stop block 53 contacts the left side of the gear 52; a fixing hole is provided in the middle part of the unloading fixing plate 7 below the gear 52, the lower middle part of the punch top block 10 is embedded in the upper part of the fixing hole, and a lower spring 16 is provided at the lower part of the fixing hole, and the lower spring 16 The top end is connected with the bottom end of the punch top block 10, and a punch accommodating through hole is provided downwardly in the middle of the bottom surface of the fixing hole, and the punch accommodating through hole passes through the unloading fixing plate 7. After the upper part of the punch 3 passes through the middle of the lower spring 16, its top end is connected with the middle of the bottom of the punch top block 10, and the lower part of the punch 3 is located in the punch accommodating through hole. Since the teeth and tooth grooves on the gear 52 are distributed at intervals, when the gear 52 rotates to the point where the teeth on the gear 52 contact the punch top block 10, the punch 3 is pressed by the teeth on the upper gear 52, and the bottom end of the punch 3 comes out from the punch accommodating through hole to punch and cut the material on the die fixing plate 9. When the gear 52 rotates to the point where the tooth groove on the gear 52 contacts the punch top block 10, the punch 3 is pulled by the upper lower spring 16, and the bottom end of the punch 3 retracts into the accommodating through hole, and the material on the die fixing plate 9 cannot be punched and cut. This allows the punch 3 to punch the material once at intervals, which can meet the processing requirements of some smaller conductive terminals that require interval punching on the material strip, and the punching process does not affect the strength and quality of these smaller conductive terminals, which is not easy to break and can also adapt to the subsequent processing. By controlling the expansion and contraction of the punch, the purpose of interval punching can be achieved. Thus, the purpose of novel design, reasonable structure, and good application effect is achieved.

[0043] The above is only a preferred embodiment of a stamping die capable of controlling the expansion and contraction interval of the punch to punch out the conductive terminal of the utility model. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the creative concept of the utility model, and these all fall within the protection scope of the utility model.

Claims

1. A stamping die capable of controlling the expansion and contraction interval of a punch for punching a conductive terminal, characterized in that: It includes an upper die seat, a lower die seat and a punch, wherein the upper die seat is arranged on the top of the stamping die, and the front side of the upper die seat is connected downwardly with a punch pad, the punch pad is connected downwardly with a punch fixing plate, a discharge pad is arranged below the punch fixing plate, and the discharge pad is connected downwardly with a discharge fixing plate; the lower die seat is arranged at the bottom of the stamping die, the lower die seat is connected upwardly with a die pad, and the die pad is connected upwardly with a die fixing plate; A gear fixing seat is provided on the rear side of the middle part of the punch fixing plate, and a gear is connected to the gear fixing seat, a gear stop block is provided on the left side of the gear, and a gear shift block is provided on the right side of the gear, and the lower side of the gear contacts the top of the punch top block; an upper blind hole opening downward is provided near the right side of the middle part of the upper die seat, an upper spring is provided in the upper blind hole, a push rod is connected to the lower end of the upper spring, and a pressure block is connected to the bottom end of the push rod, a right blind hole opening to the left is provided in the middle part of the left side of the pressure block, a right spring is provided in the right blind hole, the left side of the right spring is connected to the right side of the gear shift block, and the left end portion of the gear shift block contacts the right side of the gear; a left blind hole opening to the right is provided in the middle part of the right side of the gear fixing seat, a left spring is provided in the left blind hole, the right side of the left spring is connected to the left side of the gear stop block, and the right end portion of the gear stop block contacts the left side of the gear; A fixing hole is provided in the middle of the unloading fixing plate below the gear, the middle and lower part of the punch top block is embedded in the upper part of the fixing hole, a lower spring is provided in the lower part of the fixing hole, and the top end of the lower spring is connected to the bottom end of the punch top block, and a punch accommodating through hole is also provided downwardly in the middle of the bottom surface of the fixing hole, the punch accommodating through hole passes through the unloading fixing plate, and the upper part of the punch passes through the middle of the lower spring and the top end of the punch is connected to the middle of the bottom of the punch top block, and the lower part of the punch is located in the punch accommodating through hole, and the bottom end of the punch can come out of the punch accommodating through hole after being subjected to top pressure from above to punch and cut the material on the die fixing plate.

2. A stamping die capable of controlling the expansion and contraction interval of a punch for punching a conductive terminal according to claim 1, characterized in that: The bottom end of the pressing block is connected with a stop block B; a stop block A is provided on the right side of the middle of the die fixing plate, and the stop block A is located below the stop block B, and when the upper die base and the lower die base are closed, the bottom of the stop block B is stuck on the top of the stop block A to fix the die fixing plate and the unloading fixing plate.

3. A stamping die capable of controlling the expansion and contraction interval of a punch for punching a conductive terminal according to claim 2, characterized in that: A horizontal waist-shaped hole is opened on the upper part of the punch top block in the left and right directions, and a horizontal pin is arranged between the two side walls of the upper part of the fixing hole in the left and right directions. The horizontal pin is inserted into the horizontal waist-shaped hole of the punch top block and enables the punch top block to move up and down.

4. A stamping die capable of controlling the expansion and contraction interval of a punch for punching out a conductive terminal according to claim 3, characterized in that: A circle of cylindrical protrusions is evenly arranged and fixed on the inner circumference of the rear end surface of the gear, and a gap is left between two adjacent cylindrical protrusions.

5. A stamping die capable of controlling the expansion and contraction interval of a punch for punching out a conductive terminal according to claim 4, characterized in that: The left end of the gear shift block is provided with a downwardly inclined duckbill-shaped shifting head, and when the gear shift block shifts the gear, the duckbill-shaped shifting head of the gear shift block is inserted between the two cylindrical protrusions on the right side of the gear, and the duckbill mouth of the duckbill-shaped shifting head is clamped on the lower cylindrical protrusion.

6. A stamping die capable of controlling the expansion and contraction interval of a punch for punching out a conductive terminal according to claim 5, characterized in that: The right end of the gear stop block is provided with an upwardly inclined duckbill stop head, and when the gear stop block stops the gear, the duckbill stop head of the gear stop block is inserted between the two cylindrical protrusions on the left side of the gear, and the duckbill mouth of the duckbill stop head is clamped on the upper cylindrical protrusion.

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