Cutting die for lead frame with M-shaped notches on guide rails

Abstract

The utility model discloses a cutting die for a lead frame with an M-shaped notch on a guide rail, and relates to the technical field of lead frame processing. The die comprises an upper die base and a lower die base located under the upper die base. A blanking plate is arranged under the upper die base, a positioning plate is arranged at a notch in the lower end of the blanking plate, a punch penetrating through the lower end of the positioning plate is embedded in the end face of the blanking plate, a machining plate consistent with the positioning plate in vertical position is fixed to the upper end face of the lower die base, and positioning frames are fixed to the left portion and the right portion of the upper end face of the machining plate. According to the utility model, the positioning plate is matched with the punch for use, so that the lead frame is precisely blanked, the production efficiency is improved, and the reject ratio and scrap caused by badness are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the lead frame processing technical field, especially, relate to a kind of cutting die for the lead frame of guide rail M-shaped gap. BACKGROUND

[0002] The final product using lead frame is for computer mouse, but the guide rail of lead frame has two M-shaped gaps, and its main function is to release stress during plastic packaging to prevent the frame from deforming, and the stamping die on the normal production process is used to realize the punching, the production process of the lead frame is as follows: stamping light frame→ electricity→ cutting into pieces→ inspection and packaging→ delivery, after normal cutting according to the current structure, the product M-shaped gap will be deformed, which will cause the length of the whole product to exceed the standard, and due to the characteristics of the electroplating die, it will be pulled forward, in addition, the M-shaped gap structure of the lead frame is weak, and the pulling force will cause it to be elongated from the M-shaped position, which will be deformed, and it cannot meet the customer's specifications. Therefore, we provide a kind of cutting die for the lead frame of guide rail M-shaped gap to solve the above problems. SUMMARY

[0003] The utility model aims at providing a kind of cutting die for the lead frame of guide rail M-shaped gap, by the cooperation of positioning plate and punch, the lead frame is accurately punched, the production efficiency is improved, and the rejection rate and the rejection caused by rejection are reduced.

[0004] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0005] The utility model is a kind of cutting die for the lead frame of guide rail M-shaped gap, including upper die holder and the lower die holder in the position of the lower side of upper die holder;The lower side of upper die holder is provided with the punching plate, the recess position of the lower end of punching plate is provided with positioning plate, the end surface of punching plate is embedded with the punch passing through the lower end of positioning plate, the upper end surface of lower die holder is fixed with the machining plate consistent with the upper and lower positions of positioning plate, and the left and right parts of the upper end surface of machining plate are both fixed with positioning frame.

[0006] The utility model is further provided with outer guide column at the position between upper die holder and lower die holder, and upper die holder is screw-connected with the upper end surface of outer guide column by bolt.

[0007] The utility model is further provided with guide cylinder connected by bolt at the recess position of lower die holder corresponding to outer guide column, and the lower end surface of outer guide column is inserted into the inside of guide cylinder.

[0008] The utility model is further provided with ball barrel rotatably arranged on the inner side wall of guide cylinder and connected with the outer side of outer guide column, and the bottom surface in the inside of guide cylinder is fixed with spring connected with the lower end surface of ball barrel.

[0009] The utility model further sets up, the recess inside upper die base is fixed with the top rod, and the piston end of top rod is fixedly connected with the upper end surface of blanking plate.

[0010] The utility model further sets up, the upper end surface of upper die base is fixed with the connecting rod which is symmetrical with top rod, and the piston end of connecting rod passes through blanking plate and is fixedly connected with the upper end surface of positioning plate.

[0011] The utility model further sets up, the upper end surface of lower die base is equipped with the limit hole, and the limit hole is through the upper end surface of processing plate, and the limit rod of bolt connection of lower end surface of upper die base passes through the through -hole on blanking plate and is slidably inserted in limit hole, and the position of positioning frame is between limit rod and outer guide column.

[0012] The utility model further sets up, the upper end surface of lower die base on the left of limit rod is bolted with lower stopper, and the lower end surface of upper die base is fixed with the upper stopper consistent with lower stopper.

[0013] The utility model has the advantages of:

[0014] Control upper die base moves down, thereby upper die base will drive positioning plate and lead frame abut, so that positioning plate will lead frame limit compression, at this time, upper die base will continue to go down, reach the lowest point of machine table setting height, at this time, punch will get out of positioning plate and do blanking action to lead frame, when blanking is completed, upper die base will move up under the drive of machine table, at this time, punch will first leave the surface of lead frame, then positioning plate is removed, finally, upper die base and lower die base completely separate, and reach the top position of machine table setting height, thereby complete the blanking work, and accurately blank processing lead frame, thereby improve production efficiency, reduce defective rate and defective scrap caused by. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment needed to use the drawing briefly introduced.

[0016] Figure 1 It is the structure schematic view before device work in the utility model.

[0017] Figure 2 It is the structure schematic view after device work in the utility model;

[0018] Figure 3 It is the structure schematic view of mold and lead frame in the utility model;

[0019] Figure 4 It is the schematic view of lead frame after being processed in the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1 - upper die holder, 101 - top rod, 102 - connecting rod, 103 - upper stop block, 104 - limiting rod, 2 - lower die holder, 201 - limiting hole, 202 - processing plate, 203 - positioning frame, 204 - lower stop block, 3 - outer guide column, 4 - punch, 5 - positioning plate, 6 - guide cylinder, 601 - spring, 602 - ball, 7 - blanking plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0023] Embodiment 1

[0024] Please refer to Figures 1 to 4 The utility model discloses a cutting die for lead frame with M-shaped gap of guide rail, through the cooperation of positioning plate 5 and punch 4, the lead frame is accurately blanked, the production efficiency is improved, and the defective rate and the scrap caused by defects are reduced.

[0025] Specifically, the upper die holder 1 and the lower die holder 2 located directly below the upper die holder 1; the blanking plate 7 is arranged below the upper die holder 1, the positioning plate 5 is arranged in the notch of the lower end of the blanking plate 7, the punch 4 is embedded in the end face of the blanking plate 7 and passes through the lower end of the positioning plate 5, the processing plate 202 fixed with the positioning plate 5 is fixed on the upper end face of the lower die holder 2, the positioning frame 203 is fixed on the left and right parts of the upper end face of the processing plate 202, the top rod 101 is fixed in the notch of the upper die holder 1, the piston end of the top rod 101 is fixedly connected with the upper end face of the blanking plate 7, the connecting rod 102 symmetrically arranged with the top rod 101 is fixed on the upper end face of the upper die holder 1, and the piston end of the connecting rod 102 passes through the blanking plate 7 and is fixedly connected with the upper end face of the positioning plate 5.

[0026] The operation process of the embodiment is as follows: through the use of the above structure, after the lead frame is conveyed to the processing plate 202 between the two positioning frames 203, the whole device is assembled with the external machine, the upper die holder 1 is controlled to move downward by the external machine, so that the upper die holder 1 drives the positioning plate 5 to abut against the lead frame, so that the positioning plate 5 limits and compresses the lead frame, at this time, the upper die holder 1 continues to move downward to the lowest point of the set height of the machine, at this time, the punch 4 is out of the positioning plate 5 to perform blanking on the lead frame, after the blanking is completed, the upper die holder 1 moves upward under the driving of the machine, at this time, the punch 4 first leaves the surface of the lead frame, then the positioning plate 5 is removed, finally, the upper die holder 1 and the lower die holder 2 are completely separated and reach the top position of the set height of the machine, so that the blanking work is completed, and the cycle work is continued until the production is completed.

[0027] Embodiment 2

[0028] Referring to Figure 1 and Figure 2 On the basis of example 1, the relative movement direction of the upper die holder 1 and the lower die holder 2 is ensured to be stable by the setting of the guide column.

[0029] Specifically, the outer guide column 3 is arranged at the position between the upper die holder 1 and the lower die holder 2, the upper die holder 1 is screw-connected with the upper end surface of the outer guide column 3, the lower die holder 2 is screw-connected with the guide cylinder 6 at the notch position of the outer guide column 3, the lower end surface of the outer guide column 3 is inserted into the inside of the guide cylinder 6, the inner side wall of the guide cylinder 6 is rotationally arranged with the ball 602 cylinder which is in contact with the outer side of the outer guide column 3, and the bottom surface inside the guide cylinder 6 is fixed with the spring 601 which is in contact with the lower end surface of the ball 602 cylinder.

[0030] The operation process of the embodiment is as follows: when the upper die holder 1 and the lower die holder 2 move in the opposite direction, the upper die holder 1 drives the outer guide column 3 to move along the position of the guide cylinder 6, and the outer guide column 3 drives the ball 602 to rotate and move, and at the same time, the outer guide column 3 drives the ball 602 cylinder to move downward, thereby compressing the spring 601, so that after the outer guide column 3 is reset upward, the spring 601 pushes the ball 602 cylinder to move upward and reset.

[0031] Example 3

[0032] Referring to Figure 1 and Figure 2 On the basis of example 1, the relative movement direction of the upper die holder 1 and the lower die holder 2 is ensured to be stable by the setting of the guide column.

[0033] Specifically, the upper end surface of the lower die holder 2 is provided with the limiting hole 201, the limiting hole 201 penetrates through the upper end surface of the processing plate 202, the limiting rod 104 screw-connected with the lower end surface of the upper die holder 1 penetrates through the through hole on the blanking plate 7 and is slidingly inserted into the limiting hole 201, the positioning frame 203 is arranged at the position between the limiting rod 104 and the outer guide column 3, the lower end surface of the lower die holder 2 on the left side of the limiting rod 104 is screw-connected with the lower stopper 204, and the lower end surface of the upper die holder 1 is fixed with the upper stopper 103 which is consistent with the upper and lower positions of the lower stopper 204.

[0034] The operation process of the embodiment is as follows: when the upper die holder 1 and the lower die holder 2 move in the opposite direction, the upper stopper 103 and the lower stopper 204 abut against each other, thereby controlling the distance between the upper die holder 1 and the lower die holder 2, and at the same time, the limiting rod 104 moves along the position of the limiting hole 201, thereby ensuring the movement precision between the positioning plate 5 and the processing plate 202.

[0035] In the description of the present specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A cutting die for lead frame with M-shaped notches of guide rail, comprising an upper die seat (1) and a lower die seat (2) located at a position directly below the upper die seat (1); characterized in that: The upper die holder (1) is provided with a blanking plate (7) below, and the lower end of the blanking plate (7) is provided with a positioning plate (5) in the notch position, the end face of the blanking plate (7) is embedded with a punch (4) penetrating through the lower end of the positioning plate (5), and the upper end face of the lower die holder (2) is fixed with a machining plate (202) consistent with the upper and lower positions of the positioning plate (5), and the left and right parts of the upper end face of the machining plate (202) are fixed with positioning frames (203).

2. The cutting die for a lead frame having M-shaped notches of the guide rail according to claim 1, wherein An outer guide column (3) is arranged at a position between the upper die holder (1) and the lower die holder (2), and the upper die holder (1) is screw-connected with the upper end face of the outer guide column (3) through bolts.

3. The cutting die for a lead frame having M-shaped notches according to claim 2, wherein The lower die holder (2) is bolt-connected with a guide cylinder (6) corresponding to the notch position of the outer guide column (3), and the lower end face of the outer guide column (3) is inserted into the inside of the guide cylinder (6).

4. The cutting die for a lead frame having M-shaped notches according to claim 3, wherein The inner side wall of the guide cylinder (6) is rotatably provided with a ball (602) cylinder in contact with the outer side of the outer guide column (3), and the bottom surface inside the guide cylinder (6) is fixed with a spring (601) in contact with the lower end face of the ball (602) cylinder.

5. The cutting die for a lead frame having M-shaped notches according to claim 1, wherein The notch inside the upper die holder (1) is fixed with a ejector rod (101), and the piston end of the ejector rod (101) is fixedly connected with the upper end face of the blanking plate (7).

6. The cutting die for a lead frame having M-shaped notches according to claim 5, wherein The upper end face of the upper die holder (1) is fixedly connected with a connecting rod (102) symmetrically arranged with the ejector rod (101), and the piston end of the connecting rod (102) penetrates through the blanking plate (7) and is fixedly connected with the upper end face of the positioning plate (5).

7. The cutting die for a lead frame having M-shaped notches according to claim 4, wherein The upper end face of the lower die holder (2) is provided with a limiting hole (201), and the limiting hole (201) penetrates through the upper end face of the machining plate (202), the lower end face of the upper die holder (1) is bolt-connected with a limiting rod (104) penetrating through the through hole on the blanking plate (7) and slidingly inserted into the limiting hole (201), and the positioning frame (203) is located between the limiting rod (104) and the outer guide column (3).

8. The cutting die for a lead frame having M-shaped notches according to claim 7, wherein The lower end face of the upper die holder (1) is fixedly connected with an upper stop block (103) consistent with the upper and lower positions of the lower stop block (204) bolt-connected with the upper end face of the lower die holder (2) on the left side of the limiting rod (104).

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