Cutting die

Abstract

The cutting die comprises a lower die body and an upper die body, two material guiding plates are arranged on the upper end face of the lower die body side by side in the length direction of the lower die body, material guiding grooves are formed in the opposite side faces of the two material guiding plates, and receding through grooves are formed in the positions, corresponding to the material guiding plates, of the lower end face of the upper die body; the lower die and the upper die are sequentially provided with a material pushing mechanism and a cutting mechanism from left to right, and the material pushing mechanism can push a material belt to move forwards. The cutting mechanism comprises a cutting knife located on the lower end face of the upper die, a cutting hole for the cutting knife to slide in is formed in the upper end face of the lower die, and the cutting mechanism cuts the material belt into single contact pins. According to the cutting die, the pushing mechanism is arranged, under the action of the two pushing arms of the upper die base, the contact pin material belt can be pushed to move forwards, a feeding mechanism does not need to be independently arranged, contact pin production equipment is reduced, and operation is relatively simplified; in addition, cutting of products of two specifications can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pin production, and in particular relates to a cutting die. Background Art

[0002] A switch socket is a device that connects and disconnects a circuit by connecting and disconnecting the circuit and the copper parts. A socket generally includes a socket body and a plug pin disposed in the socket body, which is also called a plug pin or a plug blade.

[0003] At present, during the production and processing of plug pins, multiple devices and multiple molds are needed to cut, punch, trim, and cut the material strips together to realize the production of plug pins. Among them, the cutting process is equipped with a separate feeding mechanism, through which the material strips are fed to the cutting mold to obtain complete plug pins. In order to reduce the auxiliary devices used in the production of plug pins, we have developed a cutting mold with a pushing mechanism. The pushing mechanism of the cutting mold has a feeding function to push the plug pin material strip forward. Summary of the invention

[0004] The utility model provides a cutting die, which is used for pushing forward and cutting the plug pin material strip after punching and trimming, so as to obtain complete plug pins, which is convenient for the subsequent use of the plug pins.

[0005] The technical solution adopted by the utility model is:

[0006] A cutting die comprises a lower die and an upper die, wherein the upper end surface of the lower die is provided with two material guide plates arranged in parallel along its length direction, and the opposite sides of the two material guide plates are provided with material guide grooves, and the lower end surface of the upper die is provided with a clearance groove at a position corresponding to the material guide plates; the lower die and the upper die are provided with a pushing mechanism and a cutting mechanism in sequence from left to right, a groove is provided at the left part of the upper end surface of the lower die, the pushing mechanism comprises a sliding seat movably arranged in the groove of the lower die, and two pushing arms located at the lower end surface of the upper die, and the side surface of the sliding seat is provided with a compound A positioning mechanism is provided, a blind hole is provided on the top of the sliding seat, a first spring and a pushing member are arranged in the blind hole from bottom to top in sequence, the pushing member is extended out of the sliding seat, a cover plate matching with the pushing member is provided on the two material guide plates, the two pushing arms can be inserted into the groove on the left side of the sliding seat to push the sliding seat to move rightward, and then the pushing member pushes the material strip to move forward; the cutting mechanism includes a cutting knife located at the lower end surface of the upper mold, and a cutting hole for the cutting knife to slide into is provided on the upper end surface of the lower mold, and the cutting mechanism cuts the material strip into single pins.

[0007] Preferably, the reset mechanism includes a reset rod and a second spring, wherein the reset rod is arranged on the left side of the sliding seat and moves leftward through the lower mold, and the second spring is sleeved on the reset rod located on the outer side of the lower mold.

[0008] Preferably, a positioning piece is further provided on the upper end surface of the lower mold located on the right side of the groove, and a blind hole is opened on the upper end surface of the lower mold. The positioning piece is movably arranged in the blind hole by a third spring. The positioning piece has the same structure as the pushing piece and the top is flush with the cover plate. The positioning piece cooperates with the cover plate.

[0009] Preferably, the pushing member is a prism with a pentagonal cross section, an insertion portion that can be inserted into the through hole of the material strip is formed on the top of the pushing member, and the left side of the insertion portion is tilted downward to form an inclined surface.

[0010] Preferably, the left ends of the two guide plates extend out of the upper die to form a feed end, and the right end of the upper end surface of the lower die is tilted downward to form a discharge end.

[0011] Preferably, the material guide plate located on the front side is provided with a through hole through which a pushing arm can pass, and the groove and the sliding seat extend backward to the rear of the rear material guide plate to facilitate the passage of another pushing arm; the material guide plate located on the rear side is detachably arranged on the upper end surface of the lower mold by bolts, and the upper end surface of the lower mold located on the rear side material guide plate is provided with reserved threaded holes along its length direction for facilitating the installation of the rear side material guide plate, and the material guide plate located on the rear side is provided with a reserved through hole through which another pushing arm can pass.

[0012] Preferably, a blow pin is provided on the upper end surface of the lower mold near the cutting hole, an air outlet is provided on the side wall corresponding to the direction of the cutting hole, an air pipe connecting port is provided on the side wall of the lower mold, and the air pipe connecting port is connected with the air inlet of the blow pin through the air path in the lower mold.

[0013] Preferably, two floating pins are provided on the upper end surface of the lower die between the two guide plates, and a positioning through hole is opened in the center of the floating pins.

[0014] Preferably, the upper end surface of the lower die between the two material guide plates is provided with a plurality of positioning grooves, and the lower end surface of the upper die is provided with a plurality of positioning columns that can be inserted into the positioning grooves.

[0015] Preferably, a plurality of upper guide columns are evenly distributed around the lower end surface of the upper mold, and lower guide tubes for vertical sliding of the corresponding upper guide columns are embedded around the upper end surface of the lower mold.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the cutting mold is arranged with a pushing mechanism, and under the action of the two pushing arms of the upper mold base, the pin material strip can be pushed forward, and there is no need to equip a separate feeding mechanism, which reduces the equipment for pin production and simplifies the operation relatively; in addition, by lengthening the groove and the sliding seat, and setting reserved bolt holes at the same time, and by adjusting the position of the rear guide plate, two specifications of products can be cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 Schematic diagram of the structure of the upper mold.

[0019] Figure 3 This is a split diagram of the lower mold.

[0020] Figure 4 Schematic diagram of the propulsion mechanism.

[0021] Figure 5 It is a schematic diagram of the structure of the pusher.

[0022] Figure 6 It is a schematic diagram of the structure of the pin strip.

[0023] In the figure: 1. lower mold; 2. upper mold; 3. guide plate; 4. groove; 5. sliding seat; 6. push arm; 7. reset mechanism; 8. first spring; 9. push member; 10. cover plate; 11. cutting knife; 12. cutting hole; 13. positioning member; 14. third spring; 15. feed end; 16. discharge end; 17. reserved threaded hole; 18. reserved through hole; 19. blow pin; 20. floating pin; 21. positioning groove; 22. positioning column; 23. upper guide column; 24. lower guide tube; 25. positioning hole; 26. mounting through hole; 27. air pipe connection port; 2-1. first recessed groove; 2-2. second recessed groove; 3-1. guide groove; 3-2. through hole; 7-1. reset rod; 7-2. second spring; 9-1. insertion part; 9-2. inclined surface. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described below in combination with specific implementation methods. The drawings are only used for exemplary descriptions, and only show schematic diagrams rather than physical drawings, and cannot be understood as limitations of this patent; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The cutting die of the utility model is used to push forward and cut the pin strip after stamping and trimming, so as to obtain complete pins, which is convenient for the subsequent use of the pins. A complete pin has a head 100 and a needle-shaped part 200 connected to each other. The head 100 has shoulders 300 on both sides of one end close to the needle-shaped part 200, and a through hole 400 is opened on the head between the two shoulders. Figure 5 As shown, a material strip is composed of a number of pins connected in sequence through shoulders. The pin material strip is formed after stamping and trimming. A complete pin can be obtained by cutting the middle of the shoulder.

[0026] Specifically, the cutting mold comprises a lower mold 1 and an upper mold 2, the upper end surface of the lower mold 1 is provided with two material guide plates 3 arranged in parallel along its length direction, and the opposite sides of the two material guide plates 3 are provided with material guide grooves 3-1, and the lower end surface of the upper mold is provided with two first recessed grooves 2-1 at positions corresponding to the two material guide plates; the lower mold 1 and the upper mold 2 are provided with a pushing mechanism and a cutting mechanism from left to right in sequence, a groove 4 is provided on the left part of the upper end surface of the lower mold 1, the pushing mechanism 4 comprises a sliding seat 5 movably arranged in the groove 4 of the lower mold, and two pushing arms 6 located on the lower end surface of the upper mold, a reset mechanism 7 is provided on the side of the sliding seat 5, and a blind hole is provided on the top of the sliding seat 5. A first spring 8 and a push member 9 are arranged in sequence from bottom to top in the blind hole, and the push member 9 is arranged to extend out of the sliding seat 5, and a cover plate 10 matched with the push member is arranged on the two guide plates 3, and a second recessed groove 2-2 is provided at the corresponding position of the lower end surface of the upper mold 2 and the cover plate, and the second recessed groove is connected with the first recessed groove 21, and the two push arms can be inserted downward into the groove on the left side of the sliding seat to push the sliding seat to move right, thereby causing the push member to push the material strip to move forward; the cutting mechanism includes a cutting knife 11 located at the lower end surface of the upper mold, and a cutting hole 12 is provided on the upper end surface of the lower mold for the cutting knife to slide into, and the cutting mechanism cuts the material strip into single pins.

[0027] When processing the pin strip, the upper die and the lower die are respectively installed on the punching machine, and then the punching machine drives the upper die to move upward, so as to realize the separation of the upper die and the lower die. Subsequently, the pin strip is placed between the guide grooves of the two guide plates, and moved forward to the push mechanism, the top of the push member can just extend into the through hole of the pin strip, and the push plate member is abutted against the bottom surface of the cover plate by the first spring; at this time, the punching machine drives the upper die to move vertically downward, and the upper die and the lower die are gradually closed, the two push arms on the lower end face of the upper die are first inserted downward into the left side of the sliding seat groove, and the sliding seat is pushed to the right, so that the push member drives the strip forward, then the upper die and the lower die are closed, and the cutting knife of the cutting mechanism is downward to cut the middle of the shoulder of the strip. Then the punching machine drives the upper die to move vertically upward, so as to realize the separation of the upper die and the lower die.

[0028] In this embodiment, the reset mechanism 7 on the side of the sliding seat is as follows: the reset mechanism 7 includes a reset rod 7-1 and a second spring 7-2. The reset rod 71 is arranged on the left side of the sliding seat 5 and moves to the left through the lower mold 1. The second spring 7-2 is sleeved on the reset rod 7-1 located on the outer side of the lower mold. Under the action of the second spring, the reset rod applies a leftward pulling force to the sliding seat. After the push arm leaves the groove, the sliding seat can automatically return to its original position under the action of the second spring. At the same time, there is a certain gap between the left side of the sliding seat and the left part of the groove, which is convenient for the insertion of the push arm.

[0029] Furthermore, in order to ensure the stability of the material strip when the pusher returns, a positioning member 13 is also provided on the upper end face of the lower mold on the right side of the groove. A blind hole is provided on the upper end face of the lower mold. The positioning member 13 is movably arranged in the blind hole through a third spring 14. The positioning member 13 has the same structure as the pusher 9 and is flush with the top. The positioning member 13 is located below the cover plate and cooperates with the cover plate 10. When the top of the pusher extends into the through hole of the pin material strip, the top of the positioning member is also located in a through hole on the front side of the material strip. The positioning member moves up and down relatively under the action of the third spring, but its front and rear position remains unchanged. When the sliding seat drives the pusher to return, the top of the positioning member will firmly clamp the through hole of the material strip to ensure that the material strip does not move backward.

[0030] In this embodiment, in order to enable the pusher to push the material strip to the right and return to the original position under the action of the reset mechanism, the pusher 9 is a prism with a pentagonal cross section, and the top of the pusher 9 is formed with an insertion portion 9-1 that can be inserted into the through hole of the material strip, and the left side of the insertion portion 91 is tilted downward to form an inclined surface 9-2. The insertion portion of the pusher is set in the through hole of the pin material strip, and its top is pressed against the cover plate by the first spring. The rightward movement of the sliding seat drives the pusher to move rightward, and then drives the pin material strip to move rightward. Since the left side of the top of the pusher is an inclined surface, after the two push arms of the upper mold are removed, it will be forced to move backward out of the through hole of the material strip and return to the original position. At the same time, when the insertion portion of the pushing member extends into the through hole of the pin strip, the top insertion portion of the positioning member is also located in a through hole of the strip. The positioning member moves up and down relatively under the action of the third spring, but its front and rear positions remain unchanged. The design of the left inclined surface allows the strip to move to the right without being affected. When the sliding seat drives the pushing member to return, the strip cannot move backward under the action of the insertion portion of the positioning member, thereby positioning the strip.

[0031] Furthermore, in order to facilitate feeding and discharging, the left ends of the two guide plates 3 extend out of the upper mold to form a feed end 15, which is convenient for placing the pin material strip into the guide groove and adjusting it. The right end of the upper end surface of the lower mold 1 is tilted downward to form a discharge end 16, which is a rightward and downward inclined surface to facilitate the sliding of the pin.

[0032] In this embodiment, the two push arms push the sliding seat to move rightward. The guide plate 3 at the front side is provided with a through hole 3-2 through which a push arm 6 can pass, and the groove 4 extends backward to the rear of the guide plate 3 at the rear side to facilitate the passage of the other push arm; Figure 1-2As shown, the two push arms 6 of the upper mold 2 correspond to the through hole 3-2 and the rear part of the groove, respectively, so as to facilitate the rightward movement of the sliding seat. Since the plug pin has another specification, the needle-shaped part of the plug pin is relatively long, that is, the width of the plug pin strip is relatively wide. In order to increase the adaptability of the present mold, the guide plate 3 located at the rear side is detachably arranged on the upper end face of the lower mold by bolts, and the upper end face of the lower mold located at the rear side guide plate is provided with a reserved threaded hole 17 along its length direction for facilitating the installation of the rear side guide plate, and the guide plate located at the rear side is provided with a reserved through hole 18 through which another push arm can pass. When adapting to a plug pin strip of another length, the rear side guide plate can be disassembled and fixed by bolts and reserved bolt holes. At this time, the two push arms of the upper mold pass through the through hole and the reserved through hole to push the sliding seat.

[0033] In order not to affect the subsequent cutting and to facilitate the collection of complete pins, a blow pin 19 is also provided at the upper end surface of the lower mold near the cutting hole. The blow pin 19 is provided with an air outlet on the side wall corresponding to the cutting hole. The side wall of the lower mold is provided with an air pipe connection port 27, which is connected to the air inlet of the blow pin 19 through the air path in the lower mold. The air inlet channel of the blow pin is arranged in an inverted L shape, with the air inlet located at the bottom of the blow pin and the air outlet located on the side wall. An L-shaped channel connected to the air inlet at the bottom of the blow pin is provided in the lower mold, and the air pipe connection port on the side wall of the lower mold is fixed on the L-shaped channel and connected thereto.

[0034] At the same time, in order to prevent the material strip from being scratched, the bottom of the material strip is suspended by the material guide groove of the guide plate. However, considering the stability of the material strip, two floating pins 20 are also provided on the upper end surface of the lower mold between the two guide plates, and a positioning through hole is opened in the center of the floating pin 20.

[0035] Since the pin strip itself is provided with through holes at intervals, in order to ensure the accuracy of the strip movement and cutting, the upper end surface of the lower die between the two guide plates is provided with a plurality of positioning grooves 21, and the lower end surface of the upper die is provided with a plurality of positioning columns 22 that can be inserted into the positioning grooves 21. The punching machine drives the upper die to move vertically downward, and the upper die and the lower die are gradually closed. First, the push arm of the upper die is first inserted downward into the left side of the sliding seat, and the strip is pushed forward by the pusher on the sliding seat for a unit distance, which is the distance between the two through holes. Then, the positioning column is driven by the upper die to pass through the through hole of the strip and inserted into the positioning groove of the lower die, thereby realizing the horizontal direction of the strip. Finally, the upper die and the lower die are closed, and the cutting knife of the cutting mechanism is downward to cut the middle of the shoulder of the strip. The upper die is then driven by the punch to move vertically upward, thereby realizing the separation of the upper die and the lower die, the cutting knife leaves, the positioning column is driven by the upper die to disengage from the positioning groove and the through hole of the material strip, and then the push arm leaves, and the sliding seat returns to its original position under the action of the reset spring.

[0036] Under normal circumstances, the distance between two positioning grooves should be equal to the distance between two through-holes of the material strip, which can be defined as a distance unit. However, considering the design of the groove of the lower mold, as well as the arrangement of the floating pin and the blow pin, the positioning grooves on the lower mold are not evenly spaced. The positioning grooves can be spaced one, two, or even multiple units apart, and the positioning column on the lower end face of the upper mold matches the positioning groove. Specifically, the blow pin occupies the position of one positioning groove, and there is no positioning column at the position corresponding to the blow pin of the upper mold. The two floating pins each occupy a positioning groove position to support the material strip. The floating pin positioning through hole can be used for the insertion of the positioning column, and a positioning column is also provided at the corresponding position of the lower end face of the upper mold and the floating pin positioning hole. There are two distance units between the pusher and the positioning member.

[0037] In addition, four upper guide columns 23 are vertically fixedly connected to the lower end surface of the upper mold 2, and lower guide tubes 24 are embedded around the upper end surface of the lower mold 1 for the corresponding upper guide columns to slide vertically. The four upper guide columns 23 and the four lower guide tubes 24 correspond one by one to achieve the vertical guidance of the upper mold and the horizontal limitation.

[0038] In addition, four positioning holes 25 are respectively arranged around the upper end surface of the lower die and the lower end surface of the upper die, and the positioning rods on the upper die seat and the lower die seat are inserted into the positioning holes 25 to facilitate quick positioning. The positioning rods are indicated by dotted lines. Six mounting through holes 26 are also respectively arranged around the upper end surface of the lower die and the lower end surface of the upper die, which are used to fasten the lower die and the upper die to the lower die seat and the upper die seat.

Claims

1. A cutting die, comprising a lower die and an upper die, characterized in that: The upper end surface of the lower die is provided with two material guide plates in parallel along its length direction, and the opposite sides of the two material guide plates are provided with material guide grooves, and the lower end surface of the upper die is provided with a clearance groove at the corresponding position of the material guide plate; the lower die and the upper die are provided with a pushing mechanism and a cutting mechanism from left to right in sequence, and a groove is provided on the left part of the upper end surface of the lower die, and the pushing mechanism includes a sliding seat movably arranged in the groove of the lower die, and two pushing arms located on the lower end surface of the upper die, and a reset mechanism is provided on the side of the sliding seat. A blind hole is provided on the top of the seat, and a first spring and a pusher are arranged in the blind hole from bottom to top in sequence. The pusher extends out of the sliding seat, and a cover plate matching with the pusher is provided on the two material guide plates. The two push arms can be inserted into the groove on the left side of the sliding seat to push the sliding seat to move right, so that the pusher pushes the material strip to move forward; the cutting mechanism includes a cutting knife located at the lower end surface of the upper mold, and a cutting hole for the cutting knife to slide into is provided on the upper end surface of the lower mold, and the cutting mechanism cuts the material strip into single pins.

2. The cutting die according to claim 1, characterized in that: The reset mechanism includes a reset rod and a second spring. The reset rod is arranged on the left side of the sliding seat and moves leftward through the lower mold. The second spring is sleeved on the reset rod located on the outer side of the lower mold.

3. The cutting die according to claim 1, characterized in that: A positioning piece is also provided on the upper end surface of the lower mold located on the right side of the groove. A blind hole is opened on the upper end surface of the lower mold. The positioning piece is movably arranged in the blind hole through a third spring. The positioning piece has the same structure as the pushing piece and the top is flush. The positioning piece cooperates with the cover plate.

4. The cutting die according to claim 1 or 3, characterized in that: The pusher is a prism with a pentagonal cross section. An insertion portion capable of being inserted into the through hole of the material strip is formed on the top of the pusher, and the left side of the insertion portion is tilted downward to form an inclined surface.

5. The cutting die according to claim 1, characterized in that: The left ends of the two guide plates extend out of the upper die to form a feeding end, and the right end of the upper end surface of the lower die is inclined downward to form a discharging end.

6. The cutting die according to claim 1, characterized in that: The material guide plate located on the front side is provided with a through hole through which a pushing arm can pass, and the groove and the sliding seat extend backward to the rear of the rear material guide plate to facilitate the passage of another pushing arm; the material guide plate located on the rear side is detachably arranged on the upper end surface of the lower mold by bolts, and the upper end surface of the lower mold located on the rear side material guide plate is provided with reserved threaded holes along its length direction to facilitate the installation of the rear side material guide plate, and the material guide plate located on the rear side is provided with a reserved through hole through which another pushing arm can pass.

7. The cutting die according to claim 1, characterized in that: A blow pin is also provided on the upper end surface of the lower mold near the cutting hole, and an air outlet is provided on the side wall corresponding to the cutting hole. An air pipe connecting port is provided on the side wall of the lower mold, and the air pipe connecting port is connected with the air inlet of the blow pin through the air path in the lower mold.

8. The cutting die according to claim 1, characterized in that: The upper end surface of the lower die between the two material guide plates is also provided with two floating material pins, and a positioning through hole is opened in the center of the floating material pins.

9. The cutting die according to claim 1, characterized in that: The upper end surface of the lower die located between the two material guide plates is provided with a plurality of positioning grooves, and the lower end surface of the upper die is provided with a plurality of positioning columns which can be inserted into the positioning grooves.

10. The cutting die according to claim 1, characterized in that: A plurality of upper guide columns are evenly distributed around the lower end surface of the upper die, and lower guide tubes for vertical sliding of the corresponding upper guide columns are embedded around the upper end surface of the lower die.

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