Connector bending tool

Abstract

The utility model relates to the technical field of connector production equipment, in particular to a connector bending tool, which solves the problem that in the prior art, a bending punch can damage a surface coating of a terminal in the bending process, and comprises an upper die cavity and a base, a supporting block is arranged on the base, an upper pressing block is connected onto the upper die cavity in a sliding mode, and a lower pressing block is connected onto the lower die cavity in a sliding mode. The upper pressing block corresponds to the supporting block in position, the upper die cavity is movably connected with a roller frame, and the lower end of the roller frame is rotationally connected with a roller. The bending tool has the advantages that when the bending tool is used, the idler wheel is in contact with a terminal in a connector, relative movement between the idler wheel and the terminal is rolling, friction between the idler wheel and the terminal is effectively reduced, meanwhile, the terminal is prevented from being subjected to large bending static friction force, and damage to a plating layer on the surface of the terminal is reduced.

Description

Technical Field

[0001] This utility model relates to the field of connector manufacturing equipment technology, and in particular to a connector bending fixture. Background Technology

[0002] Currently, board-side connectors are soldered onto the circuit board of automotive electronic products, while wire-side connectors are provided for mating, enabling electrical connection between the wire-side connectors and board-side connectors, allowing the automotive electronic products to operate normally. Connector terminals are generally manufactured using a copper alloy as the base, with an electroplating layer applied to the base. After the terminals are installed in the connector, they are bent using a bending fixture. Because the bending fixture uses a row-by-row bending method, the bending angle of the entire row of terminals often exceeds or falls below 90 degrees.

[0003] Patent CN205056886U discloses a cam-type bending fixture for automotive connector pins, including an upper die, a lower die, a punch fixing block, a pressure block, a bending punch, a return spring, a product positioning block, a bending forming insert block, a bearing positioning block, and a ball bearing. The upper part of the punch fixing block is fixed in the cavity of the upper die plate; the pressure block is installed in the cavity of the unloading plate; the bending punch is hinged in the upper cavity of the punch fixing block, with its lower left side being an inclined surface and its lower right side being the bending working surface; the return spring is installed in the mounting hole of the bending punch; the lower parts of the product positioning block, the lower parts of the bending forming insert block, and the lower parts of the bearing positioning block are fixed from right to left in three cavities opened on the lower die plate; the ball bearing is installed on the upper part of the bearing positioning block.

[0004] When using bending fixtures, relative sliding can occur between the bending punch and the terminal. The bending punch can easily damage the plating on the surface of the terminal, reducing product quality. Utility Model Content

[0005] This utility model proposes a connector bending fixture, which solves the problem that the bending punch will damage the plating on the terminal surface during the bending process in the prior art.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A connector bending fixture includes an upper die cavity and a base. A support block is mounted on the base. An upper pressure block is slidably connected to the upper die cavity, and the upper pressure block corresponds in position to the support block. A roller frame is movably connected to the upper die cavity, and a roller is rotatably connected to the lower end of the roller frame. During use, the roller contacts the terminal in the connector, and the relative movement between the roller and the terminal is rolling, effectively reducing friction between the roller and the terminal. This also prevents the terminal from experiencing excessive static bending friction, minimizing damage to the plating on the terminal surface.

[0008] The outer circumference of the roller is provided with multiple contour grooves. When bending the terminal, the terminal enters the contour groove, and the contour groove limits the terminal in the left and right directions to ensure that the terminal is bent in the vertical direction, that is, to ensure that the terminal will not deflect to the left or right during bending.

[0009] The upper end of the roller frame is rotatably connected to the upper mold cavity via a roller frame shaft. The roller frame shaft is arranged laterally, and the roller frame can swing back and forth around the roller frame shaft.

[0010] The upper mold cavity is equipped with a roller frame baffle, which mates with the outer surface of the roller frame. A roller frame spring is installed between the roller frame and the upper mold cavity, with the spring located in the middle of the roller frame. The roller frame baffle limits the roller frame's movement, restricting its swing range. The roller frame spring is a compression spring, which, supported by the upper mold cavity, pushes the roller frame into contact with the roller frame baffle.

[0011] The base is provided with a roller guide block, and the roller guide block is positioned corresponding to the roller.

[0012] The roller guide block has an outer arc surface and a guide slope on the side near the support block, and the guide slope and the outer arc surface are tangent to each other.

[0013] The support block has a relief slope on the side near the roller guide block. Considering the springback after the terminal is bent, the relief slope allows the terminal bending angle to be greater than the actual required bending angle, so that the terminal bending angle after the bending springback meets the actual requirements.

[0014] The upper mold cavity is equipped with a cover plate at the top, which is connected to the upper pressure block via a return spring. Before bending, the return spring is pulled open by the weight of the upper pressure block itself; during bending, the upper pressure block and the support block cooperate to clamp the connector housing, at which point the cover plate and the upper pressure block compress the return spring.

[0015] The cover plate is provided with a connector for connection to the drive mechanism. The drive mechanism drives the upper mold cavity to move up and down through the connector, thereby bending the connector terminals.

[0016] A positioning block is provided above the support block. The positioning block is used as a reference when placing the connector to ensure accurate placement of the connector, thereby ensuring accurate bending of the terminal.

[0017] The upper die cavity is equipped with guide pillars, and the base is equipped with bushings, with the guide pillars and bushings slidingly engaged. When the upper die cavity moves up and down, the engagement of the guide pillars and bushings guides the upper die cavity, corrects center offset, and ensures the motion accuracy and repeatability of the entire bending fixture.

[0018] The beneficial effects of this utility model are: 1. When the terminal is bent, the roller and the terminal roll relative to each other, which effectively reduces the friction between the roller and the terminal, and at the same time avoids the terminal being subjected to a large bending static friction force, reducing the damage to the plating on the terminal surface.

[0019] 2. The roller is equipped with a contour groove. When bending, the terminal enters the contour groove. The contour groove limits the left and right directions of the terminal to ensure that the terminal is bent in the vertical direction, that is, to ensure that the terminal will not deflect to the left or right when bending. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a connector bending fixture structure according to the present invention;

[0022] Figure 2 This is a schematic diagram of the upper mold cavity structure;

[0023] Figure 3 This is a front view of the bending fixture;

[0024] Figure 4 for Figure 3 Sectional view at point AA;

[0025] Figure 5 This is a schematic diagram of the roller structure.

[0026] In the diagram: 1. Connector, 2. Cover plate, 3. Upper mold cavity, 4. Roller frame shaft, 5. Guide post, 6. Roller shaft, 7. Positioning block, 8. Rear baffle, 9. Base, 10. Bushing, 11. Front baffle, 12. Roller guide block, 13. Support block, 14. Roller, 15. Roller frame, 16. Roller frame baffle, 17. Upper pressure block, 18. Return spring, 19. Roller frame spring. Detailed Implementation

[0027] 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.

[0028] Example 1, such as Figure 1 , Figure 3 , Figure 4 As shown, a connector bending fixture includes an upper mold cavity 3 and a base 9. A support block 13 is provided on the base 9. An upper pressing block 17 is slidably connected to the upper mold cavity 3. The upper pressing block 17 corresponds to the position of the support block 13. A roller frame 15 is movably connected to the upper mold cavity 3. A roller 14 is rotatably connected to the lower end of the roller frame 15. In this embodiment, the upper mold cavity 3 is provided with a vertically arranged cavity, and the upper pressure block 17 is slidably engaged with the cavity, that is, the upper pressure block 17 can slide up and down relative to the upper mold cavity 3. When the bending fixture is in normal state, the lowest point of the roller 14 is not lower than the lower end of the upper pressure block 17. When the bending fixture is in use, the external drive mechanism drives the upper mold cavity 3 to move downward toward the base 9. First, the upper pressure block 17 and the support block 13 cooperate to clamp and fix the connector. Then, when the upper mold cavity 3 continues to move downward, the roller 14 pushes the terminal to bend. During the terminal bending process, the relative movement between the roller 14 and the terminal is rolling, which effectively reduces the friction between the roller 14 and the terminal, and at the same time avoids the terminal being subjected to large bending static friction force, reducing the damage to the plating on the terminal surface.

[0029] Furthermore, such as Figure 5 As shown, the outer circumference of the roller 14 is provided with multiple contouring grooves. In this embodiment, the number of contouring grooves is equal to the number of terminals on the connector; the contouring grooves are trapezoidal grooves, and the spacing between the trapezoidal grooves is equal to the spacing between the terminals on the connector; when bending the terminals, the roller 14 moves downward and contacts the terminals. At this time, the terminals enter the contouring grooves, and the contouring grooves limit the terminals in the left and right directions to ensure that the terminals are bent in the vertical direction, that is, to ensure that the terminals will not deflect left or right when bending.

[0030] Example 2, based on Example 1, provides a connector bending fixture where the upper end of a roller frame 15 is rotatably connected to an upper mold cavity 3 via a roller frame shaft 4. In this example, the front side of the upper mold cavity 3 has a groove, and the roller frame 15 is vertically positioned within the groove. Specifically, the upper end of the roller frame 15 is fitted with a roller frame shaft 4, and both ends of the roller frame shaft 4 are rotatably connected to the sidewalls of the groove, allowing the roller frame 15 to rotate around the roller frame shaft 4.

[0031] Furthermore, a roller frame baffle 16 is provided on the upper mold cavity 3, and the roller frame baffle 16 is engaged with the outer side of the roller frame 15; a roller frame spring 19 is provided between the roller frame 15 and the upper mold cavity 3, and the roller frame spring 19 is located in the middle of the roller frame 15. In this embodiment, the roller frame baffle 16 is provided on both sides of the groove on the upper mold cavity 3, and the roller frame baffle 16 is engaged with the upper part of the roller frame 15. The roller frame baffle 16 can limit the roller frame 15, so that the roller frame 15 can only swing back and forth within the groove; the roller frame spring 19 is a compression spring. When the bending fixture is in normal state, the roller frame 15 is in contact with the roller frame baffle 16 under the action of the roller frame spring 19.

[0032] Furthermore, a roller guide block 12 is provided on the base 9, and the roller guide block 12 corresponds to the position of the roller 14. The roller guide block 12 has an outer arc surface and a guide slope on the side near the support block 13, and the guide slope and the outer arc surface are tangent. During the downward movement of the roller 14, it sequentially contacts the outer arc surface and the guide slope, which guide the roller 14, causing the roller frame 15 to swing towards the support block 13, thereby achieving the bending of the terminal.

[0033] Furthermore, a clearance slope is provided on the side of the support block 13 near the roller guide block 12. The clearance slope is inclined away from the roller guide block 12. During the downward movement of the roller 14, the roller frame 15 swings under the action of the guide slope, so that the bending angle of the terminal pushed by the roller 14 can be greater than the actual required bending angle. After the terminal is bent, it will spring back, thereby obtaining the terminal bending angle that meets the actual requirements. In this embodiment, the inclination angle of the clearance slope is 80°, the bending angle is 100° when the roller 14 pushes the terminal to bend, and then the terminal springs back. After the springback, the actual bending angle of the terminal in use is 90°.

[0034] Example 3 differs from Example 2 in that it includes a connector bending fixture. The base 9 has a front baffle 11, and a roller guide block 12 is placed on the base 9 and then connected to the front baffle 11 by bolts. The base 9 also has a rear baffle 8, and a positioning block 7 is located above the support block 13. The positioning block 7 is connected to the rear baffle 8 by bolts. When placing the connector, the positioning block 7 serves as a reference to ensure accurate connector placement, thereby ensuring accurate terminal bending. Furthermore, the front baffle 11 provides support for the roller guide block 12, and the rear baffle 8 provides support for the positioning block 7, ensuring the stability of the roller guide block 12 and the positioning block 7 during terminal bending.

[0035] Furthermore, such as Figure 2As shown, a cover plate 2 is provided on the top of the upper mold cavity 3. The cover plate 2 is connected to the upper pressure block 17 via a return spring 18. In this embodiment, the cover plate 2 is fixed to the upper mold cavity 3 by screws. Before bending, the return spring 18 is stretched under the weight of the upper pressure block 17. During the bending process, the upper pressure block 17 and the support block 13 cooperate to clamp the connector housing. At this time, the cover plate 2 and the upper pressure block 17 compress the return spring 18.

[0036] Furthermore, the cover plate 2 is provided with a connecting member 1 for connecting to the drive mechanism. In this embodiment, the connecting member 1 is a connecting bolt, which is threadedly connected to the cover plate 2; the drive mechanism is any one of a hydraulic cylinder, a pneumatic cylinder, an electric push rod, or a guide rail slider mechanism, and the drive mechanism can drive the cover plate 2 to move through the connecting bolt, thereby driving the upper mold cavity 3 to move up and down.

[0037] Furthermore, the upper die cavity 3 is provided with guide posts 5, and the base 9 is provided with bushings 10, with the guide posts 5 and bushings 10 in sliding fit. When the terminal is bent, the upper die cavity 3 moves downward and drives the guide posts 5 into the bushings 10. The fit between the guide posts 5 and the bushings 10 guides the upper die cavity 3, ensuring the motion accuracy and repeatability of the entire bending fixture.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connector bending fixture, comprising an upper die cavity (3) and a base (9), wherein a support block (13) is provided on the base (9), characterized in that, The upper mold cavity (3) is slidably connected to an upper pressure block (17), the upper pressure block (17) and the support block (13) are in the same position, and the upper mold cavity (3) is movably connected to a roller frame (15), and the lower end of the roller frame (15) is rotatably connected to a roller (14).

2. The connector bending fixture according to claim 1, characterized in that, The outer circle of the roller (14) is provided with multiple contour grooves.

3. The connector bending fixture according to claim 1 or 2, characterized in that, The upper end of the roller frame (15) is rotatably connected to the upper mold cavity (3) via the roller frame shaft (4); the upper mold cavity (3) is provided with a roller frame baffle (16), which is fitted to the outside of the roller frame (15); a roller frame spring (19) is provided between the roller frame (15) and the upper mold cavity (3), and the roller frame spring (19) is located in the middle of the roller frame (15).

4. The connector bending tooling of claim 3, wherein, The base (9) is provided with a roller guide block (12), and the roller guide block (12) corresponds to the position of the roller (14).

5. The connector bending fixture according to claim 4, characterized in that, The roller guide block (12) has an outer arc surface and a guide slope on the side near the support block (13), and the guide slope and the outer arc surface are tangent.

6. The connector bending fixture according to claim 5, characterized in that, The support block (13) has a clearance ramp on the side near the roller guide block (12).

7. The connector bending fixture according to any one of claims 1, 2, 4 to 6, characterized in that, The top of the upper mold cavity (3) is provided with a cover plate (2), which is connected to the upper pressure block (17) by a reset spring (18).

8. The connector bending tool of claim 7, wherein, The cover plate (2) is provided with a connector (1) for connecting to the drive mechanism.

9. The connector bending fixture according to claim 1 or 8, characterized in that, A positioning block (7) is provided above the support block (13).

10. The connector bending fixture according to claim 1, characterized in that, The upper mold cavity (3) is provided with guide pillars (5), and the base (9) is provided with bushings (10). The guide pillars (5) and bushings (10) are in sliding fit.

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