Terminal riveting equipment

Abstract

The utility model discloses terminal riveting equipment, which comprises an upper riveting die and a lower riveting die, the lower riveting die comprises a fixed base and a lower riveting head, the lower riveting head comprises a first movable part, a second movable part and a fixed part, the width of the fixed part is consistent with that of a terminal, and the first movable part and the second movable part are arranged on the fixed base. A recess for accommodating the terminal is formed among the first movable part, the second movable part and the fixed part; when the first movable piece and the second movable piece are pressed, the first movable piece and the second movable piece overcome the elastic force of the first elastic piece and the second elastic piece to move downwards, and the recess gradually becomes shallow. According to the utility model, the recess formed by the two movable parts and the fixed part is used for limiting the terminal, so that the terminal cannot move along the horizontal direction in the riveting process, and the riveting precision of the terminal is high.

Description

Technical Field

[0001] The utility model belongs to the field of circuit board production, and in particular relates to a terminal riveting device for riveting terminals on a circuit board. Background Art

[0002] In the production process of circuit boards, it is often necessary to connect terminals to external components. There are many ways to connect terminals to circuit boards, such as welding and riveting. Compared with welding, riveting is simple to operate and has stable connections, so it is widely used. Terminals are usually riveted to circuit boards using terminal riveting equipment.

[0003] In the existing terminal riveting equipment, there are two methods: placing the terminal on the upper surface of the circuit board and fixing and riveting the terminal through the upper riveting die, and placing the terminal on the lower surface of the circuit board and fixing and riveting the terminal through the lower riveting die, and then riveting the terminal and the circuit board together. Regardless of the method, the terminal needs to be fixed relative to the circuit board, and no horizontal displacement occurs during the riveting process, ensuring that the multiple terminals riveted on the circuit board are neatly arranged to facilitate stable connection with external components. Summary of the invention

[0004] In view of the problems existing in the prior art, the main purpose of the utility model is to provide a terminal riveting device which ensures that the terminal position will not produce horizontal displacement during riveting.

[0005] In order to achieve the above main purpose, the utility model provides a terminal riveting device, including an upper riveting die and a lower riveting die located at a riveting position, wherein the terminal is conveyed to the riveting position through a terminal material strip, one end of the terminal is connected to the material strip along its width direction, and the other end is a free end, and there is a terminal spacing between adjacent terminals, the upper riveting die includes an upper riveting head and a vertical driving mechanism, and the vertical driving mechanism drives the upper riveting head to move in a vertical direction; the lower riveting die includes a fixed base and a lower riveting head, and the lower riveting head includes a first movable part, a second movable part and a fixed part located between the two and clamped by the two, wherein the width of the fixed part is the same as that of the terminal The width of the first movable member and the second movable member are consistent, and the first movable member and the second movable member can slide in the vertical direction relative to the fixed member; the fixed base is provided with a first elastic member and a second elastic member that act on the first movable member and the second movable member respectively, and under the action of the elastic force, the top surfaces of the first movable member and the second movable member are at least partially higher than the upper surface of the fixed member, so that a recess for accommodating the terminal is provided between the first movable member, the second movable member and the fixed member; when the first movable member and the second movable member are pressed by the upper riveting head, they overcome the elastic force of the first elastic member and the second elastic member and move downward, and the recess gradually becomes shallower.

[0006] It can be seen from the above scheme that a depression for placing the terminal is formed between the first movable part, the second movable part and the fixed part. The terminal is placed in the depression before riveting. After the upper riveting head moves downward until it contacts the circuit board, it continues to move downward and applies a downward force to the first movable part and the second movable part to overcome the elastic force of the first elastic part and the second elastic part and move downward until the circuit board contacts the terminal and moves further downward. The terminal is supported by the fixed part and cannot move downward. The side wall of the depression restricts the terminal from being displaced in the horizontal direction. The first movable part and the second movable part move downward to make the depression gradually shallower, and the terminal is riveted to the circuit board, thereby achieving high riveting accuracy.

[0007] According to a specific implementation of the utility model, the top surfaces of the first movable member and the second movable member are inclined surfaces, and are inclined upward toward the fixed member.

[0008] It can be seen from the above scheme that the top surfaces of the first movable member and the second movable member are configured as inclined surfaces. When the terminal strip moves forward along the conveying direction, the terminal can slide along the inclined surface and then fall into the recess and be positioned therein.

[0009] According to a specific implementation of the utility model, the lower riveting die further includes a terminal rear limiter for abutting against the free end of the terminal.

[0010] It can be seen from the above scheme that by providing a rear limiter for the terminal, the terminal is further limited so that the terminal cannot move along the length direction of the terminal.

[0011] According to a specific implementation of the utility model, the terminal rear limiter is connected to a horizontal driving mechanism, and the horizontal driving mechanism drives the terminal rear limiter to move in a horizontal direction.

[0012] It can be seen from the above scheme that by setting a horizontal driving mechanism to drive the rear limiter of the terminal to move, the rear limiter of the terminal plays a limiting role when the terminal is riveted, and is detached from the terminal after the terminal is riveted, without affecting the movement of the terminal after riveting.

[0013] According to a specific implementation of the utility model, the terminal rear limiter has a downwardly inclined guide surface.

[0014] It can be seen from the above scheme that the downwardly inclined guide surface can guide the free end of the terminal to prevent the free end of the terminal from tilting upward.

[0015] According to a specific implementation of the utility model, the lower riveting die further includes a positioning pin and a third elastic member, the positioning pin can be inserted into the positioning hole of the material strip, and the third elastic member applies an upward elastic force to the positioning pin.

[0016] It can be seen from the above scheme that by setting a positioning pin to penetrate into the positioning hole of the material strip, the terminal material strip is relatively positioned and the terminal is positioned at the same time.

[0017] According to a specific implementation of the utility model, the lower riveting die further includes a cutting piece, and the cutting piece has a hole for the positioning pin to pass through and a groove for accommodating the material strip.

[0018] It can be seen from the above solution that by providing a cutting piece, the terminal is disconnected from the material strip during riveting, and no additional steps are required to remove the material strip.

[0019] According to a specific implementation of the utility model, the terminal riveting device includes a pulling mechanism, and the pulling mechanism moves the terminal along the feeding direction by a terminal spacing in one action. The terminal is fed to the riveting position by a mixing mechanism.

[0020] According to a specific implementation of the utility model, the material pulling mechanism is arranged downstream of the riveting position.

[0021] According to a specific embodiment of the utility model, the material pulling mechanism includes a motor, a screw rod, a shift block and a fourth elastic member, the shift block has a shift end that can be extended into the positioning hole of the material strip, and when the motor drives the screw rod to rotate, it pushes the shift block to overcome the restoring force of the fourth elastic member and move, so that the shift end moves out of the positioning hole, and the restoring force of the fourth elastic member causes the shift block to return to the position where the shift end enters the next positioning hole.

[0022] In order to more clearly illustrate the above-mentioned objectives, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the terminal strip;

[0024] Figure 2 It is a schematic diagram of the top view of the material pulling mechanism in the embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the material pulling mechanism in the embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the lower riveting die in the embodiment of the utility model;

[0027] Figure 5 yes Figure 4 AA cross-sectional structure diagram;

[0028] Figure 6This is a schematic diagram of the top view of the lower riveting die in the embodiment of the utility model;

[0029] Figure 7 yes Figure 6 Schematic diagram of the BB cross-section structure. DETAILED DESCRIPTION

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in this application all belong to the protection scope of this application.

[0031] Figure 1 A portion of the terminal strip is shown. Figure 1 As shown, the terminal strip includes a strip 63 and a terminal connected to the strip 63 along its width direction, the terminal includes a riveted portion 62 and an extended portion 61, wherein the riveted portion 62 is located at the connecting end connected to the strip, the extended portion 61 is located at the free end, the distance between adjacent terminals is the terminal spacing, when riveted to the circuit board, the riveted portion 62 is riveted together with the circuit board, and the extended end 61 extends from the circuit board to connect with external components, and a positioning hole 631 is provided on the strip 63 at a position corresponding to the terminal.

[0032] The terminal riveting device of the utility model embodiment may include a terminal feeding device, a circuit board feeding device and a terminal detection device, etc. These devices can be existing devices, and their structures and working processes are not described in detail here. In this embodiment, there are an upper riveting die and a lower riveting die located at the riveting position, wherein the terminal is conveyed to the riveting position through a terminal strip. After a terminal is riveted to the circuit board, a pulling mechanism is required to move the next terminal to the riveting position. The pulling mechanism can be located upstream of the riveting position in the feeding direction of the terminal strip, or it can be located downstream of the riveting position. Preferably, the pulling mechanism is located downstream of the riveting position in the feeding direction of the terminal strip. The advantage of this is that the terminal strip is always subjected to tension during the process of feeding to the riveting position, thereby preventing the terminal strip from generating local warping deformation problems during the process of feeding to the riveting position, ensuring the flatness of the terminal strip, and improving the terminal riveting accuracy.

[0033] The structure of the pulling mechanism is as follows Figure 2 and Figure 3As shown. The material pulling mechanism includes a motor 11, a coupling 12, a screw 13, a sliding block 14, a rotating pin 15, a movable block 16, an elastic member 17 and a shifting block 18, wherein the elastic member 17 is used as an example of a fourth elastic member. The shifting block 18 has a shifting end (not shown in the figure) that can be inserted into the positioning hole 631 of the material strip 63. When the motor 11 drives the screw 13 to rotate, the shifting block 18 is pushed to overcome the restoring force of the elastic member 17 to move, so that after the shifting end is moved out of the positioning hole 631, the restoring force of the elastic member 17 causes the shifting block 18 to return to the position where the shifting end enters the next positioning hole 631. In this embodiment, the motor can be a stepping motor or a servo motor. The use of a screw can make the movement of the material strip more precise, ensuring that one terminal spacing is moved each time. The sliding block 14, the rotating pin 15, the movable block 16, the elastic member 17 and the shifting block 18 can be similar to those in the prior art, and will not be repeated here.

[0034] In the riveting position of this embodiment, an upper riveting die and a lower riveting die are provided. The upper riveting die may have an upper riveting head and a vertical driving mechanism, the vertical driving mechanism drives the upper riveting head to move in the vertical direction, and the structure of the lower riveting die is shown in FIG. Figures 4 to 7 .

[0035] like Figure 4 and Figure 5 As shown, the lower riveting die includes a mounting base 31, a mounting seat 32, an outer mounting seat 35 fixed base 36 and a lower riveting head, and the lower riveting head includes a first movable member 341, a second movable member 342 and a fixed member 361 located between the two and clamped by the two, wherein the width of the fixed member 361 is consistent with the width of the terminal, the first movable member 341 and the second movable member 342 can slide in the vertical direction relative to the fixed member 361, and the fixed member 361 is fixedly connected to the fixed base 36 or is a part of the fixed base 36; there is a cavity 362 between the fixed base and the first movable member 341 and the second movable member 342, and the first elastic member 371 and the second elastic member 372 acting on the first movable member 341 and the second movable member 342 are arranged in the cavity 362. When the lower riveting head is not under pressure, under the action of the elastic force, the top surface of the first movable member 341 and the second movable member 342 near the fixed member 361 is higher than the upper surface of the fixed member 361, thereby forming a recess 343 for accommodating the terminal. When the first movable member 341 and the second movable member 342 are pressed, they can overcome the elastic force of the first elastic member 371 and the second elastic member 372 and move downward, and the recess 343 gradually becomes shallower. The top surface of the first movable member 341 and the second movable member 342 is configured as an inclined surface and is inclined upward toward the fixing member 361, so that when the terminal strip moves forward along the conveying direction, the terminal can slide along the inclined surface and then fall into the recess 343 and be positioned therein.

[0036] A mounting member 22 is fixedly disposed on one side of the mounting seat 32 on the mounting base plate 31 , and a cylinder 21 as a horizontal driving mechanism is mounted on the mounting member 22 , and a terminal rear limiter 33 is connected to the cylinder 21 .

[0037] like Figure 6 and Figure 7 As shown, a cutting piece 41, a positioning pin 42 and an elastic piece 43 are provided on the outer mounting seat 35, wherein the elastic piece 43 is used as an example of a third elastic piece. The positioning pin 42 can be inserted into the positioning hole 631 of the material strip 63, and the elastic piece 43 applies an upward elastic force to the positioning pin 42. The cutting piece 41 has an opening groove 411 through which the material strip can pass. The terminal rear limit member 33 is connected to the piston 211 of the cylinder 21 and can be moved by the piston 211. The terminal rear limit member 33 has a guiding inclined surface 331 and an abutting portion 332. The guiding inclined surface 331 is used to guide the extension portion 61 of the terminal when the terminal rear limit member is pushed by the piston 221 to move toward the terminal, so that the free end of the terminal abuts against the abutting portion 332 to limit the movement of the terminal.

[0038] When this embodiment is working, the terminal can enter the riveting position through the terminal feeding device and the pulling mechanism, the material strip 63 enters the open groove of the cutting piece 41, the positioning pin 41 extends into the positioning hole 631 of the material strip 63, the riveted portion 62 of the terminal is placed on the upper surface of the fixing member 361 and is clamped by the first movable member 341 and the second movable member 342, and the rear limiting member 33 of the terminal moves toward the terminal under the push of the cylinder 21, and its guiding inclined surface 331 guides the protruding end 61 of the terminal until the free end of the terminal abuts against the abutting portion 332, and the terminal is positioned in the recess 343 and cannot move in the horizontal direction. At this time, the circuit board feeding device moves the part of the circuit board to be riveted to the riveting position, and the upper riveting head moves downward under the action of the vertical driving mechanism until it abuts against the circuit board and moves further downward, and applies a downward force to the first movable member 341 and the second movable member 342, overcoming the elastic force of the first elastic member 371 and the second elastic member 372 and moving downward until the circuit board contacts the terminal and moves further downward. The terminal is supported by the fixing member 361 and cannot move downward. The recessed side wall restricts the terminal from being displaced in the horizontal direction. The first movable member 341 and the second movable member 342 move downward to gradually shallow the recess, and the terminal and the circuit board are riveted together. At the same time, the terminal receives the pressure of the upper riveting head and is cut off by the lower port of the opening groove 411 of the cutting member 41, and the terminal is disconnected from the material strip 63 at the riveting position.

[0039] After the terminal is riveted onto the circuit board, the rear limiter 33 of the terminal moves away from the terminal, and the position of the terminal is no longer limited. The upper riveting head moves upward under the action of the vertical driving mechanism, and the first movable member 341 and the second movable member 342 move upward under the elastic force of the elastic members 371 and 372, respectively, pushing the circuit board upward. The riveted terminal moves upward with the circuit board, and a recess 343 for accommodating the terminal is formed between the first movable member 341, the second movable member 342 and the fixing member 361. The pulling mechanism is actuated, and the material belt pushes the positioning pin 42 to overcome the elastic force of the elastic member 43 and move downward. The next terminal moves along the top surface of the movable member until it falls into the recess 343. The positioning pin moves upward under the elastic force of the elastic member and penetrates into the positioning hole 631 to perform the next riveting action.

[0040] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, any changes or improvements made according to the present invention should be covered by the protection scope of the present invention.

Claims

1. A terminal riveting device, comprising an upper riveting die and a lower riveting die located at a riveting position, wherein the terminal is conveyed to the riveting position through a terminal strip, one end of the terminal is connected to the strip along its width direction, and the other end is a free end, and there is a terminal spacing between adjacent terminals, characterized in that: The upper riveting die comprises an upper riveting head and a vertical driving mechanism, and the vertical driving mechanism drives the upper riveting head to move in a vertical direction; The lower riveting die comprises a fixed base and a lower riveting head, wherein the lower riveting head comprises a first movable member, a second movable member and a fixed member located between the first movable member and clamped by the second movable member, wherein the width of the fixed member is consistent with the width of the terminal, and the first movable member and the second movable member can slide in a vertical direction relative to the fixed member; The fixed base is provided with a first elastic member and a second elastic member acting on the first movable member and the second movable member respectively, and under the action of elastic force, the top surfaces of the first movable member and the second movable member are at least partially higher than the upper surface of the fixed member, so that a recess for accommodating the terminal is provided between the first movable member, the second movable member and the fixed member; When the first movable member and the second movable member are pressed by the upper riveting head, they overcome the elastic force of the first elastic member and the second elastic member and move downward, and the depression gradually becomes shallower.

2. The terminal riveting equipment according to claim 1, characterized in that: The top surfaces of the first movable member and the second movable member are configured as inclined surfaces and are inclined upward toward the fixed member.

3. The terminal riveting equipment according to claim 2, characterized in that: The lower riveting die also includes a terminal rear stopper for abutting against the free end of the terminal.

4. The terminal riveting equipment according to claim 3, characterized in that: The terminal rear limiter is connected to a horizontal driving mechanism, and the horizontal driving mechanism drives the terminal rear limiter to move in a horizontal direction.

5. The terminal riveting equipment according to claim 4, characterized in that: The terminal rear stopper has a downwardly inclined guide surface.

6. The terminal riveting equipment according to claim 1, characterized in that: The lower riveting die also includes a positioning pin and a third elastic member. The positioning pin can be inserted into the positioning hole of the material strip, and the third elastic member applies an upward elastic force to the positioning pin.

7. The terminal riveting equipment according to claim 6, characterized in that: The lower riveting die also includes a cutting piece, which is provided with a hole for the positioning pin to pass through and a groove for accommodating the material strip.

8. The terminal riveting equipment according to any one of claims 1 to 7, characterized in that: The terminal riveting device comprises a material pulling mechanism, and the material pulling mechanism moves the terminal along the feeding direction by one terminal spacing in one action.

9. The terminal riveting equipment according to claim 8, characterized in that: The material pulling mechanism is arranged downstream of the riveting position.

10. The terminal riveting equipment according to claim 9, characterized in that: The material pulling mechanism includes a motor, a screw rod, a shift block and a fourth elastic member. The shift block has a shift end that can be extended into the positioning hole of the material strip. When the motor drives the screw rod to rotate, it pushes the shift block to overcome the restoring force of the fourth elastic member and move, so that the shift end moves out of the positioning hole. The restoring force of the fourth elastic member causes the shift block to return to the position where the shift end enters the next positioning hole.

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