Center needle rounding forming structure

Abstract

The utility model relates to a center needle rounding forming structure. The center needle rounding forming structure comprises an upper die and a lower die installed below the upper die. The upper die comprises an upper die base, an upper clamping plate and a stripper plate which are sequentially stacked, upper die stripping spring assemblies are arranged in the upper die base and the upper clamping plate, and a first upper die slotting tool and a second upper die slotting tool are arranged in the upper clamping plate and the stripper plate at intervals. The lower die comprises a lower die base and a lower die plate which are stacked in sequence, a center needle rounding forming assembly is arranged in the lower die plate, and the center needle rounding forming assembly comprises a first rear limiting insert and a second rear limiting insert which are arranged on the lower die plate; the first sliding block and the second sliding block are arranged between the first rear limiting insert and the second rear limiting insert and are respectively provided with a first forming insert and a second forming insert; the front limiting insert is arranged between the first sliding block and the second sliding block; and a first spring and a second spring are respectively arranged between the front limiting insert and the first sliding block and the second sliding block which are opposite to the front limiting insert. Burrs on the edge of the center pin are extruded by die assembly pressure, so that products are stable in rounding, and side edges are free of burrs.

Description

Technical Field

[0001] This utility model relates to the field of stamping die design and manufacturing technology, specifically to a center pin rounding forming structure. Background Technology

[0002] With the development of modern industry, stamping technology has developed rapidly, leading to the emergence of various connectors in automotive connectors. Communication connectors are widely used in application modules, with communication center pin terminals being frequently used.

[0003] In actual production, the general forming process for center pin products is as follows: After rough cutting, the upper die is pre-formed into an arc, followed by piercing and fine cutting, forming the pin in two steps (top and bottom), pushing the side edges to remove burrs, and finally rounding the head. This continuous forming process is crucial. However, for center pin products, the rounded area is a functional area where burrs are not permitted. The existing forming structure is unstable and cannot completely solve the problem of side burrs on the rounded pins. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one of the defects of the prior art and provide a center needle rounding structure.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A center-pin rounding forming structure includes an upper mold and a lower mold installed below the upper mold;

[0007] The upper mold includes an upper mold base, an upper clamping plate, and a stripper plate stacked from top to bottom. An upper mold stripper spring assembly is provided in the upper mold base and the upper clamping plate. A first upper mold insert and a second upper mold insert are spaced apart in the upper clamping plate and the stripper plate. The upper mold stripper spring assembly controls the downward movement and retraction of the first upper mold insert and the second upper mold insert.

[0008] The lower mold includes a lower mold base and a lower mold plate stacked sequentially from bottom to top. A center pin rounding forming assembly is disposed within the lower mold plate. The center pin rounding forming assembly includes:

[0009] A first rear limiting insert and a second rear limiting insert are spaced apart on the lower template;

[0010] A first slider and a second slider are disposed between the first rear limiting insert and the second rear limiting insert, and the first slider and the second slider are respectively provided with a first molding insert and a second molding insert;

[0011] A front limiting insert is disposed between the first slider and the second slider, and a first spring and a second spring are respectively disposed between the front limiting insert and the first slider and the second slider opposite to it.

[0012] Furthermore, the upper mold stripping spring assembly includes a screw, a third spring, and a force transmission pin. The screw and the third spring are both located inside the upper mold base. The screw is located on the side of the upper mold base away from the upper clamping plate. One end of the third spring is connected to the screw, and the other end is connected to the force transmission pin. The force transmission pin passes through the upper clamping plate.

[0013] Preferably, the screw is a stop screw.

[0014] Preferably, the length of the force transmission pin is greater than or equal to the width of the upper clamping plate.

[0015] Furthermore, the first slider and the second slider are respectively provided with spring receiving grooves on one side of the front limiting insert, and the first spring and the second spring are respectively placed in the corresponding spring receiving grooves.

[0016] Furthermore, the first slider and the second slider have trapezoidal transitions near the ends of the first upper die insert and the second upper die insert, respectively.

[0017] Furthermore, an upper pad is provided between the upper mold base and the upper clamping plate.

[0018] Furthermore, a stop plate is also provided between the upper clamping plate and the stripping plate.

[0019] Furthermore, a lower pad is provided between the lower mold base and the lower template.

[0020] Furthermore, a lower pad and a lower support plate are fixedly connected to the lower part of the lower mold base in sequence.

[0021] For center needle products, the round needle area is a functional area of ​​the product, and burrs are not allowed in this area. Existing technologies have unstable rounding structures and cannot completely solve the problem of burrs on the sides of the round needles. This utility model uses mold closing pressure to squeeze out burrs, and the formed product has stable rounding and no burrs on the sides. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the central pin rounding molding structure in the mold opening state in the embodiment;

[0023] Figure 2 for Figure 1 A partial schematic diagram of the central pin rounding forming component;

[0024] Figure 3This is a schematic diagram of the central pin rounding molding structure in the closed mold state in the embodiment;

[0025] Figure 4 for Figure 3 A partial schematic diagram of the central pin rounding forming component;

[0026] The following are the labels in the diagram: 1. Upper mold base; 2. Upper backing plate; 3. Upper clamping plate; 4. Stop plate; 5. Stripper plate; 6. Lower mold plate; 7. Lower backing plate; 8. Lower mold base; 9. Screw; 10. Third spring; 11. Force transmission pin; 12-1. First upper mold insert; 12-2. Second upper mold insert; 13-1. First rear limit insert; 13-2. Second rear limit insert; 14-1. First slider; 14-2. Second slider; 15-1. First forming insert; 15-2. Second forming insert; 16. Front limit insert; 17. Center pin area; 18-1. First spring; 18-2. Second spring. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0028] Example

[0029] This embodiment provides a center pin rounding structure; see details below. Figure 1-4 It includes an upper mold and a lower mold installed below the upper mold;

[0030] The upper mold includes an upper mold base 1, an upper clamping plate 3, and a stripper plate 5 stacked from top to bottom. An upper mold stripper spring assembly is provided in the upper mold base 1 and the upper clamping plate 3. A first upper mold insert 12-1 and a second upper mold insert 12-2 are spaced apart in the upper clamping plate 3 and the stripper plate 5. The upper mold stripper spring assembly controls the downward movement and retraction of the first upper mold insert 12-1 and the second upper mold insert 12-2.

[0031] The lower mold includes a lower mold base 8 and a lower mold plate 6 stacked sequentially from bottom to top. A center pin rounding forming assembly is disposed within the lower mold plate 6. The center pin rounding forming assembly includes:

[0032] A first rear limiting insert 13-1 and a second rear limiting insert 13-2 are spaced apart on the lower template 6;

[0033] A first slider 14-1 and a second slider 14-2 are disposed between the first rear limiting insert 13-1 and the second rear limiting insert 13-2, and a first molding insert 15-1 and a second molding insert 15-2 are respectively disposed on the first slider 14-1 and the second slider 14-2;

[0034] A front limiting insert 16 is disposed between the first slider 14-1 and the second slider 14-2. A first spring 18-1 and a second spring 18-2 are respectively disposed between the front limiting insert 16 and the first slider 14-1 and the second slider 14-2 opposite to it.

[0035] In this embodiment, the upper mold stripper spring assembly includes a screw 9, a third spring 10, and a force transmission pin 11. Both the screw 9 and the third spring 10 are located within the upper mold base 1. The screw 9 is located on the side of the upper mold base 1 facing away from the upper clamping plate 3. One end of the third spring 10 is connected to the screw 9, and the other end is connected to the force transmission pin 11. The force transmission pin 11 penetrates the upper clamping plate 3. Preferably, the screw 9 is a stop screw; the length of the force transmission pin 11 is greater than or equal to the width of the upper clamping plate 3.

[0036] In this embodiment, the first slider 14-1 and the second slider 14-2 are respectively provided with spring receiving grooves on one side of the front limiting insert 16, and the first spring 18-1 and the second spring 18-2 are respectively placed in the corresponding spring receiving grooves.

[0037] In this embodiment, the first slider 14-1 and the second slider 14-2 have trapezoidal transitions near the ends of the first upper die insert 12-1 and the second upper die insert 12-2, respectively.

[0038] In this embodiment, an upper pad 2 is also provided between the upper mold base 1 and the upper clamping plate 3.

[0039] In this embodiment, a stop plate 4 is also provided between the upper clamping plate 3 and the stripping plate 5.

[0040] In this embodiment, a lower pad 7 is also provided between the lower mold base 8 and the lower template 6.

[0041] In this embodiment, a lower pad and a lower support plate are fixedly connected in sequence below the lower mold base 8.

[0042] Working principle:

[0043] When the mold descends during the mold closing action, the stripper plate 5 first contacts the material, pressing down on the center pin as it moves downwards. After the stripper plate 5 and the lower mold plate 6 are closed, the third spring 10 is pressed down, the force transmission pin 11 retracts, the upper mold presses down, and the first upper mold insert 12-1 and the second upper mold insert 12-2 begin to descend until they contact the trapezoidal arcs of the first lower mold slider 14-1 and the second lower mold slider 14-2 respectively. The first lower mold slider 14-1 and the second lower mold slider 14-2 then drive the first forming insert 15-1 and the second forming insert 15-2 to move forward until the first lower mold slider 14-1 and the second lower mold slider 14-2 touch... After the front limit insert 16 can no longer move forward, the first forming insert 15-1 and the second forming insert 15-2 contact the left and right sides of the center pin and simultaneously extrude material towards the center for forming. After forming is completed, the upper mold retracts, the third spring 10 releases pressure and springs open, the force transmission pin 11 springs down, the first upper mold insert 12-1 and the second upper mold insert 12-2 retract, the first lower mold slider 14-1 and the second lower mold slider 14-2 respectively drive the first forming insert 15-1 and the second forming insert 15-2 to start retracting until they respectively contact the first rear limit insert 13-1 and the second rear limit insert 13-2, and the slider stroke ends.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A center pin rounding structure, characterized in that, Includes an upper mold and a lower mold installed below the upper mold; The upper mold includes an upper mold base (1), an upper clamping plate (3), and a stripper plate (5) stacked from top to bottom. The upper mold base (1) and the upper clamping plate (3) are provided with an upper mold stripper spring assembly. The upper clamping plate (3) and the stripper plate (5) are provided with a first upper mold insert (12-1) and a second upper mold insert (12-2) spaced apart. The upper mold stripper spring assembly controls the downward movement and retraction of the first upper mold insert (12-1) and the second upper mold insert (12-2). The lower mold includes a lower mold base (8) and a lower template (6) stacked sequentially from bottom to top. A center pin rounding forming assembly is provided inside the lower template (6). The center pin rounding forming assembly includes: A first rear limiting insert (13-1) and a second rear limiting insert (13-2) are spaced apart on the lower template (6); A first slider (14-1) and a second slider (14-2) are disposed between the first rear limiting insert (13-1) and the second rear limiting insert (13-2), and a first molding insert (15-1) and a second molding insert (15-2) are respectively disposed on the first slider (14-1) and the second slider (14-2); A front limiting insert (16) is disposed between the first slider (14-1) and the second slider (14-2). A first spring (18-1) and a second spring (18-2) are respectively disposed between the front limiting insert (16) and the first slider (14-1) and the second slider (14-2) opposite to it.

2. The center pin rounding structure according to claim 1, characterized in that, The upper mold ejector spring assembly includes a screw (9), a third spring (10), and a force transmission pin (11). The screw (9) and the third spring (10) are both located inside the upper mold base (1). The screw (9) is located on the side of the upper mold base (1) away from the upper clamping plate (3). One end of the third spring (10) is connected to the screw (9), and the other end is connected to the force transmission pin (11). The force transmission pin (11) passes through the upper clamping plate (3).

3. The center pin rounding structure according to claim 2, characterized in that, The screw (9) is a stop screw.

4. The center pin rounding structure according to claim 2, characterized in that, The length of the force transmission pin (11) is greater than or equal to the width of the upper clamping plate (3).

5. The center pin rounding structure according to claim 1, characterized in that, The first slider (14-1) and the second slider (14-2) are respectively provided with spring receiving grooves on one side of the front limiting insert (16), and the first spring (18-1) and the second spring (18-2) are respectively placed in the corresponding spring receiving grooves.

6. The center pin rounding structure according to claim 1, characterized in that, The first slider (14-1) and the second slider (14-2) have trapezoidal transitions near the ends of the first upper die insert (12-1) and the second upper die insert (12-2), respectively.

7. The center pin rounding structure according to claim 1, characterized in that, An upper pad (2) is also provided between the upper mold base (1) and the upper clamping plate (3).

8. The center pin rounding structure according to claim 1, characterized in that, A stop plate (4) is also provided between the upper clamping plate (3) and the stripping plate (5).

9. The center pin rounding structure according to claim 1, characterized in that, A lower pad (7) is also provided between the lower mold base (8) and the lower template (6).

10. The center pin rounding structure according to claim 1, characterized in that, The lower mold base (8) is fixedly connected to a lower pad and a lower support plate in sequence below it.

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