Springback compensation die for precision sheet metal parts

Abstract

The utility model relates to die technical field, and disclose precise sheet metal part springback compensation mould, including base, lower mould, upper die and springback compensation subassembly, the lower mould installs at the top of base, the upper die is located the top of lower mould, the upper die and lower mould make the sheet metal part forming when closing mould, through springback compensation subassembly exerts the edge pressure to sheet metal part when closing mould of upper die and lower mould, springback compensation subassembly includes L shape fixed plate, the below of L shape connecting plate is provided with a plurality of springs, a plurality of the bottom outer surface of spring is fixedly connected with pressure block. The utility model fixes when closing mould of upper die and lower mould, drives pressure block to sheet metal part through spring and carries out the pressing material, and through the rotation adjusting screw rod, makes the adjusting screw rod drive adjusting plate to adjust the spring elasticity, thereby adjusts the size of pressure block to sheet metal part edge pressure, and provides the edge pressure of continuity, effectively restraines sheet metal part springback.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a precision sheet metal springback compensation mold. Background Technology

[0002] In the stamping process of precision sheet metal parts, due to the elastic properties of sheet metal materials, elastic recovery (i.e., springback) is very likely to occur after stamping, resulting in deviations between the actual dimensions of the parts and the design dimensions. This springback problem is particularly prominent in forming processes such as bending, flanging, and deep drawing, seriously affecting the dimensional accuracy and assembly performance of precision sheet metal parts, and becoming a key bottleneck restricting the improvement of product quality.

[0003] In the existing technology, there are many shortcomings in the mold compensation method for sheet metal springback: some molds use ordinary springs as the pressing device, but their pressure output stability is poor, and the pressure fluctuates greatly as the compression stroke increases, which cannot provide a uniform and continuous pressing force for the sheet metal and is difficult to effectively suppress springback; moreover, the pressure adjustment of ordinary springs is difficult, and repeated mold trials are required by replacing shims and changing spring models, which is cumbersome and inefficient. Therefore, a precision sheet metal springback compensation mold is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a precision sheet metal springback compensation mold to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision sheet metal springback compensation mold, comprising:

[0006] Base;

[0007] The lower mold is mounted above the base.

[0008] The upper mold is located above the lower mold, and the upper mold and the lower mold are closed to form the sheet metal part;

[0009] A springback compensation component is located on both sides when the upper and lower molds are closed. The springback compensation component applies a pressing force to the sheet metal part when the upper and lower molds are closed.

[0010] Furthermore, the rebound compensation component includes an L-shaped fixing plate, a horizontal plate is provided on the top outer surface of the L-shaped fixing plate, a plurality of L-shaped connecting plates are fixedly connected to the outer surface of the horizontal plate, a plurality of springs are provided below the L-shaped connecting plates, and pressure blocks are fixedly connected to the bottom outer surface of the plurality of springs.

[0011] Furthermore, an adjusting screw is threaded through the top outer surface of the L-shaped connecting plate, and an adjusting plate is rotatably connected to the bottom outer surface of the adjusting screw. Multiple sets of springs are respectively installed at the bottom of multiple adjusting plates.

[0012] Furthermore, guide rods are fixedly connected to the four corners of the top outer surface of the base, and guide holes are opened at the four corners of the upper mold, with the guide holes matching the guide rods.

[0013] Furthermore, the inner wall of the guide hole is equipped with a plurality of balls arranged in a circumferential array. When the upper mold is sleeved on the outside of the guide rod, the plurality of balls are in contact with the outer surface of the guide rod.

[0014] Furthermore, mounting grooves are provided on the outer surfaces of both the left and right sides of the base, and the L-shaped fixing plate is installed in the mounting grooves.

[0015] Furthermore, the top outer surface of the base is threaded with a positioning bolt at the mounting groove, and the L-shaped fixing plate has multiple positioning screw holes arranged in a linear array in the horizontal direction, and the positioning bolt is connected to the internal thread of one of the positioning screw holes.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, when the upper and lower molds are closed, the L-shaped fixing plate is fixed, and the pressure block is driven by the spring to press the sheet metal part. By rotating the adjusting screw, the adjusting screw drives the adjusting plate to adjust the elasticity of the spring, thereby adjusting the magnitude of the pressing force of the pressure block on the sheet metal part and providing a continuous pressing force to effectively suppress the springback of the sheet metal part.

[0018] 2. In this invention, the upper mold moves along the guide rod during mold closing to guide the upper mold and the lower mold to close precisely. When the upper mold slides on the surface of the guide rod, the ball bearings slide on the surface of the guide rod, converting sliding friction into rolling friction and reducing the friction between the upper mold and the guide rod. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model when the mold is not closed;

[0021] Figure 3 This is a top view of the upper mold structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the rebound compensation component of this utility model;

[0023] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 100, base; 101, lower mold; 102, upper mold; 200, L-shaped fixing plate; 201, L-shaped connecting plate; 202, adjusting screw; 203, adjusting plate; 204, spring; 205, pressure block; 300, positioning screw hole; 400, guide rod; 401, guide hole; 402, ball bearing. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] Please refer to the following: Figures 1-5 This utility model provides a technical solution: a precision sheet metal springback compensation mold, including a base 100, a lower mold 101, an upper mold 102 and a springback compensation component. The lower mold 101 is installed above the base 100, and the upper mold 102 is located above the lower mold 101. When the upper mold 102 and the lower mold 101 are closed, the sheet metal part is formed. The springback compensation component is located on both sides when the upper mold 102 and the lower mold 101 are closed. The springback compensation component applies a pressing force to the sheet metal part when the upper mold 102 and the lower mold 101 are closed.

[0028] Furthermore, the springback compensation component includes an L-shaped fixing plate 200. A horizontal plate is provided on the top outer surface of the L-shaped fixing plate 200. Multiple L-shaped connecting plates 201 are fixedly connected to the outer surface of the horizontal plate. Multiple springs 204 are provided below the L-shaped connecting plates 201. A pressure block 205 is fixedly connected to the bottom outer surface of the multiple springs 204. Specifically, the sheet metal material is placed between the upper mold 102 and the lower mold 101. The upper mold 102 and the lower mold 101 are closed. After the L-shaped fixing plate 200 is installed, the pressure block 205 is positioned above the upper mold 102. The springs 204 drive the pressure block 205 to perform the pressing operation on the upper mold 102.

[0029] Furthermore, an adjusting screw 202 is threaded through the top outer surface of the L-shaped connecting plate 201, and an adjusting plate 203 is rotatably connected to the bottom outer surface of the adjusting screw 202. Multiple sets of springs 204 are respectively installed at the bottom of multiple adjusting plates 203. Specifically, by rotating the corresponding adjusting screw 202, the adjusting screw 202 drives the adjusting plate 203 to move downward, which in turn drives the spring 204 and the pressure block 205 to move downward, causing the spring 204 to compress. This adjusts the magnitude of the pressure block 205 on the sheet metal part and provides a continuous pressure force, effectively suppressing the springback of the sheet metal part.

[0030] Furthermore, guide rods 400 are fixedly connected to the four corners of the top outer surface of the base 100, and guide holes 401 are opened at the four corners of the upper mold 102. The guide holes 401 are adapted to the guide rods 400. Specifically, during mold closing, the guide holes 401 slide on the surface of the guide rods 400, so that the upper mold 102 moves along the guide rods 400 for guidance, so that the upper mold 102 and the lower mold 101 are accurately closed.

[0031] Furthermore, multiple balls 402 are installed in a circumferential array on the inner wall of the guide hole 401. When the upper mold 102 is sleeved on the outside of the guide rod 400, the multiple balls 402 are in contact with the outer surface of the guide rod 400. Specifically, when the upper mold 102 slides on the surface of the guide rod 400, the balls 402 slide on the surface of the guide rod 400, converting sliding friction into rolling friction and reducing the friction between the upper mold 102 and the guide rod 400.

[0032] Furthermore, mounting grooves are provided on the outer surfaces of both the left and right sides of the base 100, and the L-shaped fixing plate 200 is installed in the mounting groove. Specifically, when installing the L-shaped fixing plate 200, the L-shaped fixing plate 200 is inserted into the mounting groove, and the mounting groove provides space for the installation of the L-shaped fixing plate 200.

[0033] Furthermore, the top outer surface of the base 100 is threaded with a positioning bolt at the mounting groove. The L-shaped fixing plate 200 has multiple positioning screw holes 300 arranged in a linear array in the horizontal direction. The positioning bolt is connected to the internal thread of one of the positioning screw holes 300. Specifically, the L-shaped fixing plate 200 is installed by inserting one end of the L-shaped fixing plate 200 into the mounting groove and screwing the positioning bolt into the corresponding positioning screw hole 300. By screwing the positioning bolt into different positioning screw holes 300, the position of the pressure block 205 on the upper mold 102 can be adjusted.

[0034] Working principle: In use, the sheet metal material is placed between the upper mold 102 and the lower mold 101. The upper mold 102 and the lower mold 101 are closed. After the L-shaped fixing plate 200 is installed, the pressure block 205 is positioned above the upper mold 102. The spring 204 drives the pressure block 205 to press the upper mold 102. According to the actual pressing force required, the corresponding adjusting screw 202 is rotated. The adjusting screw 202 drives the adjusting plate 203 to move downward, which in turn drives the spring 204 and the pressure block 205 to move downward, compressing the spring 204. This adjusts the pressing force of the pressure block 205 on the sheet metal and provides a continuous pressing force, effectively suppressing the springback of the sheet metal.

[0035] During mold closing, the guide hole 401 slides on the surface of the guide rod 400, causing the upper mold 102 to move along the guide rod 400 for guidance, so that the upper mold 102 and the lower mold 101 can be precisely closed. When the upper mold 102 slides on the surface of the guide rod 400, the ball 402 slides on the surface of the guide rod 400, converting sliding friction into rolling friction and reducing the friction between the upper mold 102 and the guide rod 400.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision sheet metal springback compensation mold, characterized in that, include: Base (100); The lower mold (101) is mounted above the base (100). The upper mold (102) is located above the lower mold (101), and the upper mold (102) and the lower mold (101) are closed to form the sheet metal part; Springback compensation component, the springback compensation component is located on both sides when the upper mold (102) and lower mold (101) are closed, the springback compensation component applies a pressing force to the sheet metal part when the upper mold (102) and lower mold (101) are closed.

2. The precision sheet metal springback compensation mold according to claim 1, characterized in that, The rebound compensation component includes an L-shaped fixing plate (200), a horizontal plate is provided on the top outer surface of the L-shaped fixing plate (200), a plurality of L-shaped connecting plates (201) are fixedly connected to the outer surface of the horizontal plate, a plurality of springs (204) are provided below the L-shaped connecting plate (201), and a pressure block (205) is fixedly connected to the bottom outer surface of the plurality of springs (204).

3. The precision sheet metal springback compensation mold according to claim 2, characterized in that, The top outer surface of the L-shaped connecting plate (201) is threaded with an adjusting screw (202), and the bottom outer surface of the adjusting screw (202) is rotatably connected to an adjusting plate (203). Multiple sets of springs (204) are respectively installed at the bottom of multiple adjusting plates (203).

4. The precision sheet metal springback compensation mold according to claim 1, characterized in that, Guide rods (400) are fixedly connected to the four corners of the top outer surface of the base (100), and guide holes (401) are opened at the four corners of the upper mold (102). The guide holes (401) are adapted to the guide rods (400).

5. The precision sheet metal springback compensation mold according to claim 4, characterized in that, The inner wall of the guide hole (401) is equipped with a plurality of balls (402) arranged in a circumferential array. When the upper mold (102) is sleeved on the outside of the guide rod (400), the plurality of balls (402) are in contact with the outer surface of the guide rod (400).

6. The precision sheet metal springback compensation mold according to claim 2, characterized in that, The base (100) has mounting grooves on both the left and right outer surfaces, and the L-shaped fixing plate (200) is installed in the mounting groove.

7. The precision sheet metal springback compensation mold according to claim 2, characterized in that, The top outer surface of the base (100) is threaded with a positioning bolt at the mounting groove. The L-shaped fixing plate (200) has multiple positioning screw holes (300) arranged in a linear array in the horizontal direction. The positioning bolt is connected to the internal thread of one of the positioning screw holes (300).

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