Device easy for 90-degree forming in small progressive die

Abstract

The utility model relates to a device easy for 90-degree forming in a small progressive die. The device consists of three parts, namely a stripper plate insert, a forming insert and a forming punch, the angle of the left side of the bottom of the stripper plate insert is a negative angle of 90-alpha degrees, and the stripper plate insert is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees; the right side angle of the upper part of the forming insert is a negative angle of 90-alpha degrees, and the forming insert is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees; the forming punch is made of DC53 die steel subjected to vacuum heat treatment and HRC 58-62 degrees. According to the utility model, firstly, 90-degree forming only needs one working step, so that the appearance of the die is small, and the die is more beneficial to production on a small punching machine; and secondly, the negative angle of 90-alpha degrees is formed in the insert, and the angle alpha is used for counteracting the defect of material resilience, so that 90-degree forming becomes easier, and the machining can be realized without increasing procedures.

Description

Technical Field

[0001] The utility model relates to a device which is easy to form at 90 degrees in a small progressive die, and belongs to the technical field of mechanical and electronic processing. Background Art

[0002] The so-called small progressive die is initially defined as a progressive die used when the punch pressure is less than 16 tons and the template shape is less than 100mm. Because this progressive die has the advantages of multi-process integration, small shape, short production cycle, low cost, and applicable to strip and coil materials, it has been widely used in production, especially in small batch orders. However, there are still disadvantages. Due to the compact structure, the product is 90°±1°, such as Figure 1 , Figure 2 and Figure 3 As shown in the figure, the forming is usually carried out by first forming 45° and then forming 90°. In addition, the springback size of the material is different, so the 90° will also be different. Sometimes there is a phenomenon of out-of-tolerance on the parts, resulting in the need to add a separate shaping process after blanking. It is not like medium and large progressive dies that can add work steps in the mold for shaping; Figure 4 As shown in the figure, the traditional 45° + 90° forming structure needs to form 45° first (equivalent to pre-bending) to bear part of the bending force, and then directly hit 90° through vertical punches and inserts. This has several shortcomings: first, since 90° needs to go through two steps of 45° and 90°, the occupied mold space will be invisibly increased, so the template size also needs to be lengthened, which is not conducive to production on a small punch press; secondly, in practice, because of the material rebound during bending, it is very difficult to form 90° in a vertical step. For a few materials that are soft, thin, and have a small bending radius that can meet the requirements, most of the 90° will be too large, or even exceed the tolerance. In order to ensure product quality, it is necessary to add a shaping process after blanking; finally, after adding processing steps, unnecessary turnover, inspection, warehousing, shipment and other processes will follow, resulting in an increase in processing costs. Utility Model Content

[0003] The utility model aims to solve the technical problem of being able to directly realize the processing in a small progressive die from the perspective of reducing processing procedures and lowering production costs.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A device that facilitates 90° forming in a small progressive die, consisting of a stripper plate insert, a forming insert and a forming punch;

[0006] The left angle of the bottom of the stripper plate insert is a negative angle of 90°-α°, and the material is DC53 mold steel with vacuum heat treatment HRC58°∽62°;

[0007] The right angle of the upper part of the forming insert is a negative angle of 90°-α°, and the material is DC53 mold steel with vacuum heat treatment HRC58°∽62°;

[0008] The forming punch material is DC53 die steel with vacuum heat treatment HRC58°∽62°.

[0009] The beneficial effects of adopting the above technical solution are:

[0010] Firstly, the utility model only needs one process step to form the 90° shape, so the mold shape is small, which is more conducive to production on a small punch press; secondly, since the insert is made into a negative angle of 90°-α°, wherein the angle α is used to offset the deficiency of material springback, the 90° forming becomes easier and can be realized without adding a process; finally, after eliminating many unnecessary processes, the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the product structure.

[0012] Figure 2 for Figure 1 Top view.

[0013] Figure 3 for Figure 1 Right view.

[0014] Figure 4 The present invention is a schematic diagram of the forming process structure of a device that is easy to form at 90° in an existing small progressive die.

[0015] Figure 5 It is a schematic diagram of the structure before forming of the device which is easy to form at 90 degrees in the small progressive die of the utility model.

[0016] Figure 6 It is a schematic diagram of the structure before forming of the device which is easy to form at 90 degrees in the small progressive die of the utility model.

[0017] Figure 7 It is a schematic diagram of the structure before forming of the device which is easy to form at 90 degrees in the small progressive die of the utility model.

[0018] In the figure: 1-stripper plate insert, 2-forming insert, 3-forming punch, 4-product.

[0019] Figure 8 It is a structural schematic diagram of the forming process of a device that is easy to form at 90 degrees in a small progressive die of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] A device for easily forming at 90° in a small progressive die, which is composed of a stripper plate insert 1, a forming insert 2 and a forming punch 3;

[0022] The stripper plate insert 1 is assembled in the stripper plate cavity, and a hanging platform is specially provided to prevent it from falling, which plays the role of pressing the material, angle forming, and angle adjustment. During processing, the material is pre-pressed before bending to avoid poor flatness caused by material deformation. The left angle of the bottom of the stripper plate insert 1 is a negative angle of 90°-α°, which is conducive to the 90° forming of the product. The material is DC53 mold steel with good machining performance, small heat treatment deformation, wear resistance, impact resistance, etc., and vacuum heat treatment HRC58°∽62°;

[0023] The forming insert 2 is assembled in the cavity of the concave mold plate, and plays the role of lifting the material, angle forming, angle adjustment, and size adjustment. During processing, the material is lifted in advance and the material between the inclined surface of the unloading plate insert is closely attached before bending to avoid poor flatness caused by material deformation. The right angle of the upper part of the forming insert 2 is a negative angle of 90°-α°, which is conducive to the 90° forming of the product. The material is DC53 mold steel with good machining performance, small heat treatment deformation, wear resistance, impact resistance, etc., and vacuum heat treatment HRC58°∽62°;

[0024] The forming punch 3 is assembled in the fixed plate cavity, and is specially hung to prevent it from falling, so as to play the role of angle forming and size adjustment. The material is DC53 die steel with the advantages of good machining performance, small heat treatment deformation, wear resistance and impact resistance, and vacuum heat treatment HRC58°∽62°.

[0025] Due to the existence of α°, 90° forming becomes easier in small progressive dies.

[0026] The application method of the 90° forming device in a small progressive die is as follows:

[0027] Step 1: Before forming, that is, when the mold is installed on the punch press and is at the top dead center, the components are suspended and no operation is performed at this time;

[0028] Step 2: During forming, the punch press moves downward, and the stripper plate insert 1 and the forming insert 2 first press the material to complete the pre-forming work;

[0029] Step 3: After forming, the punch slider continues to move downward, the product is formed, and the punch has reached the bottom dead point. After completion, the punch slider moves upward and the mold is reset by the spring.

[0030] The present application combines the 45° forming step and the 90° forming step into a 90°-α° step, such as Figure 8 As shown in the figure, due to the existence of α°, the forming insert can be easily made into a negative angle to compensate for the springback of the raw material. The value of α° can be temporarily determined according to the product material, thickness, bending radius, etc., and then corrected according to the actual situation during the mold trial. In this way, the 90° forming in the small progressive die can be easily solved.

[0031] After the structure was successfully applied to a variety of small progressive dies for mounting plates, springs, connectors, supports and other parts, the effect was very significant, received unanimous praise from relevant personnel, and has generated hundreds of thousands of economic benefits.

Claims

1. A device for facilitating 90° forming in a small progressive die, characterized in that: It consists of three parts: a stripper plate insert (1), a forming insert (2) and a forming punch (3); The left bottom angle of the stripper plate insert (1) is a negative angle of 90°-α°, and the material is DC53 mold steel with vacuum heat treatment HRC58°∽62°; The upper right angle of the forming insert (2) is a negative angle of 90°-α°, and the material is DC53 mold steel with vacuum heat treatment HRC58°∽62°; The material of the forming punch (3) is DC53 die steel with HRC58°∽62° subjected to vacuum heat treatment.

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