Workpiece positioning mechanism of trimming die

Abstract

The utility model discloses a workpiece positioning mechanism of a trimming die. The workpiece positioning mechanism comprises a positioning block and a workpiece which is adaptively positioned and mounted, the workpiece comprises an upper machining part and a lower machining part which are arranged in parallel up and down, the rear end of the upper machining part and the rear end of the lower machining part are vertically opposite connecting ends, the two connecting ends are connected through a connecting arm, and an open cavity is formed between the upper machining part and the lower machining part; the device is characterized in that a vertically-through positioning hole is formed in the lower machining part, a positioning pin matched with the positioning hole is arranged on the positioning block, a positioning insert is arranged on the positioning block, and the positioning insert is embedded into the opening cavity and arranged below the upper machining part and at the front end of the connecting arm in a supporting mode. The positioning insert is provided with a limiting supporting component used for being supported at the rear end of the connecting arm in a limiting mode. The positioning device has the advantages of being simple and compact in structure, easy to manufacture and low in cost on the basis of achieving stable positioning of workpieces.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a workpiece positioning mechanism for a trimming die. Background Technology

[0002] A trimming die is a stamping die used in the trimming process of a workpiece to give it a certain height, diameter, and shape. Trimming dies are mainly used to trim the edges of drawn parts, making the end face flat and aesthetically pleasing, facilitating the next assembly step.

[0003] For a workpiece A with a specific structure, such as Figure 1 As shown, there are two parallel machining sections (A1, A2) connected by a connecting arm A3. Traditionally, the positioning of trimming dies for this type of workpiece relies on the workpiece's own mechanism. For example, a cavity on the lower machining section is fitted with a matching positioning seat. The positioning seat has a positioning protrusion that mates with the cavity on the machining section. The positioning protrusion conforms to the cavity, and its insertion into the corresponding cavity in the lower machining section achieves positioning. This positioning method requires a high degree of fit between the positioning protrusion and the cavity, meaning both the cavity and the positioning protrusion have high machining requirements, leading to high manufacturing costs. Furthermore, during die trimming, a stable positioning support is needed for the upper machining section to prevent vibration and workpiece deformation. Currently, a floating support cylinder with an oblique support is used on the lower side of the free end without the connecting arm A3 to provide positioning support force. However, vibration still occurs during actual processing, indicating unstable positioning support. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a workpiece positioning mechanism for a cutting die that is simple in structure, low in cost and stable in positioning.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A workpiece positioning mechanism for a trimming die includes a positioning block and a workpiece adapted for positioning and installation.

[0007] The workpiece includes an upper processing part and a lower processing part arranged in parallel. The rear ends of the upper processing part and the rear ends of the lower processing part are connected to each other. The two connecting ends are connected by a connecting arm, so that an opening is formed between the upper processing part and the lower processing part.

[0008] The lower processing part is provided with a vertically penetrating positioning hole. The positioning block is provided with a positioning pin that mates with the positioning hole. The positioning block is provided with a positioning insert. The positioning insert is embedded in the opening and supported below the upper processing part and at the front end of the connecting arm. The positioning insert is provided with a limiting support member for limiting and supporting the rear end of the connecting arm.

[0009] The positioning pin includes a positioning section and an installation section arranged coaxially from top to bottom. The positioning block is provided with an installation hole for the installation section to be vertically inserted and installed. The installation section is inserted into the installation hole, and a spring is provided between the bottom of the installation section and the bottom of the installation hole.

[0010] The mounting section is coaxially provided below for the spring to be fitted and installed, and the upper end of the spring is fitted onto the mounting section.

[0011] An anti-disengagement limiting mechanism is provided between the positioning block and the positioning pin to limit the up and down movement of the positioning pin and prevent the positioning pin from jumping out of the positioning block.

[0012] The anti-detachment limiting mechanism includes a limiting screw. The side of the positioning block has an internal threaded hole that mates with the limiting screw. The internal threaded hole is connected to the mounting hole. The central axis of the internal threaded hole is perpendicular to the central axis of the mounting hole. The side of the positioning pin has a matching limiting recess. The width of the limiting recess in the vertical direction is greater than the inner diameter of the internal threaded hole. The limiting screw is screwed into the internal threaded hole. The inner end of the limiting screw extends into the limiting recess to limit the vertical movement of the positioning pin.

[0013] The limiting recess has an upper limiting surface and a limiting abutment surface. The limiting abutment surface is an inclined end face that slopes outward from top to bottom. In the limiting state, one end of the limiting screw abuts against the limiting abutment surface.

[0014] The positioning insert has a recessed positioning cavity with a rear opening that conforms to the front end of the upper processing part. The upper processing part is embedded in the positioning cavity and supported and limited. The rear end face of the positioning insert abuts against the connecting arm and cooperates with the limiting support member to clamp and position the connecting arm. The bottom of the positioning insert is set on the positioning block and is detachably and fixedly connected to the positioning block.

[0015] The limiting support component is a limiting clamp.

[0016] The limiting clamp includes a clamp mounting base, a drive arm, and a clamping arm. A support chuck is provided at the first end of the clamping arm. The second end of the clamping arm is hinged to the clamp mounting base via a first hinge axis. One end of the drive arm is hinged to the second end of the clamping arm via a second hinge axis. The drive arm and the clamp mounting base are connected by a connecting rod. One end of the connecting rod is hinged to the drive arm via a third hinge axis, and the other end of the connecting rod is hinged to the clamp mounting base via a fourth hinge axis. The central axes of the first and fourth hinge axes are located in the same vertical plane. The clamp mounting base is fixedly mounted on the positioning insert. In the limiting support state, the support chuck abuts against the rear end face of the connecting arm and cooperates with the positioning insert to clamp and position the connecting arm.

[0017] Compared with the prior art, the advantages of this utility model are: simple and compact structure, easy to manufacture, and low cost. The positioning and installation of the lower machining part of the workpiece is achieved by the cooperation of the positioning pin and the positioning hole on the workpiece, the positioning and installation of the upper machining part of the workpiece is achieved by the cooperation of the positioning insert and the limiting support component, and the positioning and installation of the workpiece connecting arm is achieved by the cooperation of the positioning insert and the limiting support component. The cooperation of the three positioning parts achieves stable positioning of the workpiece, reliable positioning support, effectively solves the problem of vibration in risky parts, and ensures the machining quality of the workpiece. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the workpiece;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 4 A three-dimensional structural diagram of the workpiece being positioned and installed according to this utility model;

[0022] Figure 5 A cross-sectional view of the workpiece positioned and installed according to this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the limiting clamp in this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] As shown in the figure, a workpiece positioning mechanism for a cutting die includes a positioning block 1 and a workpiece A that is adapted for positioning and installation.

[0026] Workpiece A includes an upper processing part A1 and a lower processing part A2 arranged in parallel. The rear ends of the upper processing part A1 and the rear ends of the lower processing part A2 are connected to each other. The two connecting ends are connected by a connecting arm A3, so that an open mouth A4 is formed between the upper processing part A1 and the lower processing part A2.

[0027] The lower processing part A2 is provided with a vertically penetrating positioning hole A21. The positioning block 1 is provided with a positioning pin 2 that cooperates with the positioning hole A21. The positioning block 1 is provided with a positioning insert 3. The positioning insert 3 is embedded in the opening A4 and supported below the upper processing part A1 and at the front end of the connecting arm A3. The positioning insert 3 is provided with a limiting support member for limiting and supporting the rear end of the connecting arm A3.

[0028] In this specific embodiment, the positioning pin 2 includes a positioning section 201 and an installation section 202 arranged coaxially from top to bottom. The positioning block 1 has an installation hole 11 for vertical insertion of the installation section 202. The installation section 202 is inserted into the installation hole 11, and a spring 4 is provided between the bottom of the installation section 202 and the bottom of the installation hole 11. This structure enables the positioning pin 2 to be installed vertically on the positioning block 1. The structure is simple, and the spring 4 allows for elastic adjustment of the vertical position of the positioning pin 2 on the positioning block 1.

[0029] In this specific embodiment, in order to achieve stable installation of the spring 4 and provide stable elastic support, a sleeve section 203 is coaxially provided below the installation section 202 for the spring 4 to be sleeved and installed. During assembly, the upper end of the spring 4 is sleeved on the sleeve section 203.

[0030] In this specific embodiment, in order to ensure the stable installation of the positioning pin 2 on the positioning block 1 and to ensure that the positioning pin 2 can function stably, an anti-detachment limiting mechanism is provided between the positioning block 1 and the positioning pin 2 to limit the up and down movement of the positioning pin 2 and prevent the positioning pin 2 from jumping out of the positioning block 1.

[0031] In this specific embodiment, the anti-disengagement limiting mechanism includes a limiting screw 5. The side of the positioning block 1 has an internal threaded hole (not shown in the figure) that mates with the limiting screw 5. The internal threaded hole is connected to the mounting hole 11, and the central axis of the internal threaded hole is perpendicular to the central axis of the mounting hole 11. The side of the positioning pin 2 has a matching limiting recess 21. The width of the limiting recess 21 in the vertical direction is greater than the inner diameter of the internal threaded hole. The limiting screw 5 is screwed into the internal threaded hole, and the inner end of the limiting screw 5 extends into the limiting recess 21 to limit the vertical movement of the positioning pin 2. The limiting of the vertical movement of the positioning pin 2 is achieved by the cooperation of the limiting screw 5 and the limiting recess 21. The structure is simple and the operation is convenient.

[0032] In this specific embodiment, the limiting recess 21 has an upper limiting surface 211 and a limiting abutment surface 212. The limiting abutment surface 212 is an inclined end face that slopes outward from top to bottom. In the limiting state, one end of the limiting screw 5 abuts against the limiting abutment surface 212. The upper limiting surface 211 serves to limit the position, and the limiting abutment surface 212, being an inclined end face, allows for fine adjustment of the installation position of the positioning pin 2 to ensure positioning accuracy.

[0033] In this specific embodiment, the positioning insert 3 has a recessed positioning cavity 31 that conforms to the front end of the upper processing part A1 and has a rear opening. The upper processing part A1 is embedded in the positioning cavity 31 and supported and limited. The rear end face of the positioning insert 3 abuts against the connecting arm A3 and cooperates with the limiting support member to clamp and position the connecting arm A3. The bottom of the positioning insert 3 is set on the positioning block 1 and is detachably and fixedly connected to the positioning block 1. The conformed positioning cavity 31 provides stable limiting support for the upper processing part A1. The structure is simple and easy to manufacture and install.

[0034] In this specific embodiment, the limiting support component is a limiting clamp 6.

[0035] In this specific embodiment, the limiting clamp 6 includes a clamp mounting base 61, a drive arm 62, and a clamping arm 63. A support chuck 64 is provided at the first end of the clamping arm 63. The second end of the clamping arm 63 is hinged to the clamp mounting base 61 via a first hinge shaft 65. One end of the drive arm 62 is hinged to the second end of the clamping arm 63 via a second hinge shaft 66. The drive arm 62 and the clamp mounting base 61 are connected by a connecting rod 67. One end of the connecting rod 67 is hinged to the drive arm 62 via a third hinge shaft 68, and the other end of the connecting rod 67 is hinged to the clamp mounting base 61 via a fourth hinge shaft 69. The central axes of the first hinge shaft 65 and the fourth hinge shaft 69 are located in the same vertical plane. The clamp mounting base 61 is fixedly mounted on the positioning insert 3. In the limiting support state, the support chuck 64 abuts against the rear end face of the connecting rod 67 and cooperates with the positioning insert 3 to clamp and position the connecting arm A3. The structure is simple, the function is stable, and the operation is convenient.

Claims

1. A workpiece positioning mechanism for a trimming die, comprising a positioning block and a workpiece adapted for positioning and mounting; The workpiece includes an upper processing part and a lower processing part arranged in parallel. The rear ends of the upper processing part and the rear ends of the lower processing part are connected to each other. The two connecting ends are connected by a connecting arm, so that an opening is formed between the upper processing part and the lower processing part. Its features The lower processing part is provided with a vertically penetrating positioning hole. The positioning block is provided with a positioning pin that mates with the positioning hole. The positioning block is provided with a positioning insert. The positioning insert is embedded in the opening and supported below the upper processing part and at the front end of the connecting arm. The positioning insert is provided with a limiting support member for limiting and supporting the rear end of the connecting arm.

2. The workpiece positioning mechanism of a trimming die as described in claim 1, characterized in that... The positioning pin includes a positioning section and an installation section arranged coaxially from top to bottom. The positioning block is provided with an installation hole for the installation section to be vertically inserted and installed. The installation section is inserted into the installation hole, and a spring is provided between the bottom of the installation section and the bottom of the installation hole.

3. The workpiece positioning mechanism of a trimming die as described in claim 2, characterized in that... The mounting section is coaxially provided below for the spring to be fitted and installed, and the upper end of the spring is fitted onto the mounting section.

4. The workpiece positioning mechanism of a trimming die as described in claim 2, characterized in that... An anti-disengagement limiting mechanism is provided between the positioning block and the positioning pin to limit the up and down movement of the positioning pin and prevent the positioning pin from jumping out of the positioning block.

5. The workpiece positioning mechanism of a trimming die as described in claim 4, characterized in that... The anti-detachment limiting mechanism includes a limiting screw. The side of the positioning block has an internal threaded hole that mates with the limiting screw. The internal threaded hole is connected to the mounting hole. The central axis of the internal threaded hole is perpendicular to the central axis of the mounting hole. The side of the positioning pin has a matching limiting recess. The width of the limiting recess in the vertical direction is greater than the inner diameter of the internal threaded hole. The limiting screw is screwed into the internal threaded hole. The inner end of the limiting screw extends into the limiting recess to limit the vertical movement of the positioning pin.

6. The workpiece positioning mechanism of a trimming die as described in claim 5, characterized in that... The limiting recess has an upper limiting surface and a limiting abutment surface. The limiting abutment surface is an inclined end face that slopes outward from top to bottom. In the limiting state, one end of the limiting screw abuts against the limiting abutment surface.

7. The workpiece positioning mechanism of a trimming die as described in claim 1, characterized in that... The positioning insert has a recessed positioning cavity with a rear opening that conforms to the front end of the upper processing part. The upper processing part is embedded in the positioning cavity and supported and limited. The rear end face of the positioning insert abuts against the connecting arm and cooperates with the limiting support member to clamp and position the connecting arm. The bottom of the positioning insert is set on the positioning block and is detachably and fixedly connected to the positioning block.

8. The workpiece positioning mechanism of a trimming die as described in claim 1 or 7, characterized in that... The limiting support component is a limiting clamp.

9. The workpiece positioning mechanism of a trimming die as described in claim 8, characterized in that... The limiting clamp includes a clamp mounting base, a drive arm, and a clamping arm. The first end of the clamping arm is provided with a support chuck. The second end of the clamping arm is hinged to the clamp mounting base via a first hinge shaft. One end of the drive arm is hinged to the second end of the clamping arm via a second hinge shaft. The drive arm and the clamp mounting base are connected by a connecting rod. One end of the connecting rod is hinged to the drive arm via a third hinge shaft, and the other end of the connecting rod is hinged to the clamp mounting base via a fourth hinge shaft. The central axes of the first hinge shaft and the fourth hinge shaft are located in the same vertical plane. The clamp mounting base is fixedly mounted on the positioning insert. In the limited support state, the support clamp abuts against the rear end face of the connecting arm and cooperates with the positioning insert to clamp and position the connecting arm.

Images