TO-220 silicon controlled rectifier pin bending device

Abstract

The utility model discloses a TO-220 silicon controlled rectifier pin bending device which comprises a feeding channel arranged on a device body in an inclined mode, and the feeding channel feeds materials from the top to the lower portion in a sliding mode by means of the gravity of products. A first driving box and a second driving box are arranged on the two sides of the tail end of the feeding channel. Cams are mounted in the first driving box and the second driving box, a first cam in the first driving box is in driving connection with a bending female die and a lower baffle, and a second cam in the second driving box is in driving connection with a bending male die and an upper pressing plate; the tail end of the lower baffle is rotationally connected with a push rod, the lower baffle is of a semicircular structure, a cam groove is formed in the arc surface of the lower baffle, a driving ball head is arranged at the bottom of the inner shell, and when the cam groove of the lower baffle passes through the driving ball head, the lower baffle rotates; and the discharging slide way comprises a main slide way, and a branch slide way is arranged on the side, opposite to the first driving box, of the main slide way. According to the invention, pin wastes and silicon controlled rectifier products can be separately discharged.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor processing technology, specifically a TO-220 thyristor pin bending device. Background Technology

[0002] TO-220 thyristors are a common model. Before leaving the factory, the leads are bent and trimmed according to customer requirements to meet their application scenarios. A common bending process for TO-220 thyristors involves bending the leads on both sides and trimming the middle lead. Existing technologies typically use automated equipment for this process, such as the published invention patent CN105013982A, which discloses an automatic transistor lead bending machine based on a dual-cam. This machine uses dual cams as the drive source, working with a concave die and a convex die to complete the bending and trimming process. However, in actual use, trimming generates lead waste, which falls along with the product during unloading and requires manual sorting, which is cumbersome. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide a TO-220 thyristor pin bending device to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a TO-220 thyristor pin bending device, comprising:

[0005] The feeding channel is inclined on the main body of the device. The feeding channel relies on the weight of the product itself to slide from the top to the bottom to feed the product.

[0006] A first drive box and a second drive box are provided on both sides of the end of the feeding channel;

[0007] Both the first drive box and the second drive box are equipped with cams. The first cam in the first drive box is connected to the bending die and the lower baffle. The second cam in the second drive box is connected to the bending punch and the upper pressure plate.

[0008] The first and second drive boxes also have inner housings for mounting components.

[0009] When the lower baffle extends, it is used to block the end of the feeding channel. The tail end of the lower baffle is rotatably connected to a push rod. The lower baffle has a semi-circular structure and a cam groove is opened on the arc surface of the lower baffle. A drive ball head is set at the bottom of the inner shell. When the cam groove of the lower baffle passes the drive ball head, the lower baffle rotates.

[0010] It also includes a discharge chute, which includes a main chute and a branch chute on one side of the main chute relative to the first drive box.

[0011] As a preferred technical solution of this utility model, a through groove is provided on the periphery of the end of the feeding channel for the bending die, the bending punch and the upper pressure plate to enter.

[0012] As a preferred technical solution of this utility model, in addition to the cam periphery side of the first cam and the second cam being used for driving, a camshaft is also provided on the end face. The cam periphery side of the first cam is used to drive the bending die, and the camshaft of the first cam is used to drive the lower baffle. The cam periphery side of the second cam is used to drive the bending punch, and the camshaft of the second cam is used to drive the upper pressure plate.

[0013] As a preferred technical solution of this utility model, a boss is provided at one end of the lower baffle that is away from the arc surface, and a recessed groove is provided on the upper end surface of the boss.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Compared with existing bending machines, this utility model makes a modification to the lower baffle. When the lower baffle extends, it blocks the end of the feeding channel, and the cut waste material falls on the end face of the lower baffle. In addition, it is set as a rotating structure. Through the setting of cam groove and drive ball head, it generates rotation during the operation, throwing the waste material into the support slide near the lower baffle, separating it from the main slide into which the product falls. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the cam drive structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the baffle structure according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the baffle and inner shell of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4This embodiment provides a TO-220 thyristor pin bending device, with a feeding channel 11 tilted on the device body 1. The feeding channel 11 feeds the product from top to bottom by sliding under the product's own weight.

[0022] A first drive box 12 and a second drive box 13 are provided on both sides of the end of the feeding channel 11;

[0023] Cams are installed in both the first drive box 12 and the second drive box 13. The first cam 2 in the first drive box 12 drives and connects to the bending die 4 and the lower baffle 5. The second cam 8 in the second drive box 13 drives and connects to the bending punch 6 and the upper pressure plate 7.

[0024] The first drive box 12 and the second drive box 13 are also equipped with an inner housing 3 for mounting components;

[0025] The feeding channel 11 has a through groove on its circumference at the end, through which the bending die 4, the bending punch 6 and the upper pressure plate 7 enter.

[0026] In addition to the cam periphery of the first cam 2 and the second cam 8 being used for driving, a camshaft 21 is also provided on the end face. The cam periphery of the first cam 2 is used to drive the bending die 4, and the camshaft 21 of the first cam 2 is used to drive the lower baffle 5. The cam periphery of the second cam 8 is used to drive the bending punch 6, and the camshaft 21 of the second cam 8 is used to drive the upper pressure plate 7.

[0027] The main driving principle of the first cam 2 and the second cam 8 is similar to that of CN105013982A mentioned in the background art. The difference is that in this application, two sets of driving structures for the two cams, namely the camshaft side and the camshaft 21, are driven separately to achieve a time difference. Specifically, the lower baffle 5 first extends to block the pin of the product at the bottom of the feeding channel 11, then the upper pressure plate 7 extends to press down the packaging part of the bottom product, and finally the bending die 4 and the bending punch 6 close together to perform bending and cutting work.

[0028] In addition, springs are installed at the connections between the bending punch 6, the upper pressure plate 7, the bending die 4, the lower baffle 5, and the inner housing. The springs are used to achieve stroke redundancy and reset. The spring configuration can be referred to CN105013982A. Since this structure is not the focus of this embodiment, it will not be described in detail.

[0029] Since the TO-220 thyristor targeted in this application requires trimming during bending, the trimming line is achieved by adding a trimming step to the bending die 4 and bending punch 6. Trimming generates lead scrap, therefore, structural design is needed to address this scrap.

[0030] Since the waste material after cutting will fall directly into the lower baffle 5, the following improvements are made:

[0031] When the lower baffle 5 extends, it is used to block the end of the feeding channel 11. The tail end of the lower baffle 5 is rotatably connected to a push rod 54. A spring is connected between the push rod and the inner housing to achieve reset. The lower baffle 5 has a semi-circular structure. A cam groove is provided on the arc surface 53 of the lower baffle 5. A drive ball head 31 is provided at the bottom of the inner housing 3. When the cam groove of the lower baffle 5 passes the drive ball head 31, the lower baffle 5 rotates. The cam groove includes straight grooves at both ends and an arc groove in the middle. The arc groove is used to drive the lower baffle 5 to rotate, and the straight groove satisfies the linear sliding of the lower baffle 5.

[0032] In addition, in order to better handle waste materials, refer to Figure 3 As shown, a boss 52 is provided at one end of the lower baffle 5 opposite to the arc surface 53, and a recessed groove 51 is provided on the upper end surface of the boss 53.

[0033] It also includes a discharge chute 14, which includes a main chute and a branch chute 15 on one side of the main chute relative to the first drive box 12.

[0034] During use, after the die and punch close to complete the cutting and bending, the lead waste falls into the sinker 51. Then the cam continues to rotate, and the lower baffle 5 is reset under the action of the spring. The lead waste is carried out. When the arc groove in the middle of the lower baffle 5 passes the drive ball head 31, it rotates. The lower baffle 5 here throws the lead waste onto the support slide 15 for discharge, while the thyristor product falls into the main slide, realizing the separation of waste and product.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A TO-220 thyristor pin bending device, characterized in that, include: The feeding channel (11) is inclined on the main body (1) of the device. The feeding channel (11) slides from the top to the bottom to feed the product by its own weight. A first drive box (12) and a second drive box (13) are provided on both sides of the end of the feeding channel (11); Cams are installed in both the first drive box (12) and the second drive box (13). The first cam (2) in the first drive box (12) drives and connects to the bending die (4) and the lower baffle (5). The second cam (8) in the second drive box (13) drives and connects to the bending punch (6) and the upper pressure plate (7). The first drive box (12) and the second drive box (13) are also equipped with an inner shell (3) for the installation of components; When the lower baffle (5) extends, it is used to block the end of the feeding channel (11). The tail end of the lower baffle (5) is rotatably connected to the push rod (54). The lower baffle (5) has a semi-circular structure. A cam groove is provided on the arc surface (53) of the lower baffle (5). A drive ball head (31) is provided at the bottom of the inner shell (3). When the cam groove of the lower baffle (5) passes through the drive ball head (31), the lower baffle (5) rotates. It also includes a discharge chute (14), which includes a main chute and a branch chute (15) on one side of the main chute relative to the first drive box (12).

2. The TO-220 thyristor pin bending device according to claim 1, characterized in that: The end of the feeding channel (11) is provided with a through groove for the bending die (4), bending punch (6) and upper pressure plate (7) to enter.

3. The TO-220 thyristor pin bending device according to claim 2, characterized in that: In addition to the cam periphery of the first cam (2) and the second cam (8) being used for driving, a camshaft (21) is also provided on the end face. The cam periphery of the first cam (2) is used to drive the bending die (4), the camshaft (21) of the first cam (2) is used to drive the lower baffle (5), the cam periphery of the second cam (8) is used to drive the bending punch (6), and the camshaft (21) of the second cam (8) is used to drive the upper pressure plate (7).

4. The TO-220 thyristor pin bending device according to claim 1, characterized in that: A boss (52) is provided at one end of the lower baffle (5) opposite to the arc surface (53), and a recessed groove (51) is provided on the upper end surface of the boss (52).

Images