U-shaped metal part cold forming die

Abstract

The utility model discloses a cold forming die for a U-shaped metal part. The problem that according to the U-shaped metal part cold forming technology, the part elasticity recovery rebound phenomenon exists, and consequently the forming size is changed is solved. According to the scheme, the forming die comprises a base, a pair of L-shaped lower moulding beds and an upper punching die. The pair of L-shaped lower moulding beds is symmetrically installed to form a complete lower moulding bed with a U-shaped inner cavity, and the L-shaped lower moulding beds are rotationally installed on the base through lower moulding bed rotating shafts respectively. The upper punching die is in guiding sliding connection with the base through an upper punching die control plate, the end face of the upper punching die is a trapezoid with the upper end face and the lower end face being arc faces, a control supporting rod of the L-shaped lower forming die is further arranged on the base, and the control supporting rod and the base form a sliding inserting connection structure with the designed stroke through a supporting rod reset spring. The U-shaped metal part forming device has the beneficial effects that the structure is simple, the forming efficiency is high, and the rebound recovery allowance of the elastic deformation of a formed U-shaped metal part is reserved by controlling the rotating angle of the pair of L-shaped lower forming dies.

Description

TECHNICAL FIELD

[0001] The utility model relates to a metal forming die, in particular to a U-shaped metal part cold forming die which can reserve the rebound allowance of elastic deformation after forming. BACKGROUND

[0002] In the prior art, U-shaped metal part forming generally adopts hot forming process, and the hot forming process has the advantages of accurate forming and no elastic deformation rebound after forming, but has the disadvantages of low efficiency and oxidation loss caused by heating. For smaller U-shaped metal part forming, cold forming process is generally adopted, and the cold forming process has the advantage of high efficiency, but has the disadvantage that the metal part has elastic recovery rebound phenomenon after die forming, resulting in change of forming size. SUMMARY

[0003] To solve the technical problem of the elastic recovery rebound phenomenon of the metal part after die forming in the cold forming process of the U-shaped metal part, the utility model discloses a U-shaped metal part cold forming die.

[0004] The technical scheme adopted by the utility model to achieve the purpose of the application is that the forming die comprises a base, a lower die and an upper punch.

[0005] The lower die comprises a pair of L-shaped lower dies which are symmetrically arranged.

[0006] The pair of L-shaped lower dies are symmetrically installed to form a lower die structure of a complete U-shaped inner cavity, and the pair of L-shaped lower dies are respectively rotatably installed on the base through lower die shafts, thereby forming a pair of L-shaped lower dies which are respectively designed to be rotatable relative to the lower die shafts by a certain angle.

[0007] The upper punch is installed on an upper punch control plate, the upper punch control plate is in guiding sliding connection with the base, a control plate return spring is arranged between the upper punch control plate and the base, the end surface of the upper punch is a trapezoidal shape with upper and lower arc surfaces, and the lower arc surface of the end surface of the upper punch is symmetrically installed with the pair of L-shaped lower dies to form a complete U-shaped inner cavity corresponding to the arc surface.

[0008] The base is further provided with a control support rod of the L-shaped lower die, the control support rod axis is a center line of the pair of L-shaped lower dies which are symmetrically installed to form a complete U-shaped inner cavity, the upper surface of the control support rod is in contact with the bottom end of the pair of L-shaped lower dies, and the control support rod is in sliding plug-in structure with the base through a support rod return spring.

[0009] The utility model has the advantages of simple structure, high forming efficiency, and the rebound recovery allowance of the elastic deformation of the U-shaped metal part after forming can be reserved by controlling the rotation angle of the pair of L-shaped lower dies. BRIEF DESCRIPTION OF DRAWINGS

[0010] The present invention will be described in detail below with reference to the accompanying drawings.

[0011] Attachment Figure 1 Design the shape for the U-shaped part.

[0012] Attachment Figure 2 The U-shaped metal part is formed into shape in a forming die.

[0013] Attachment Figure 3 This is a schematic diagram of the beginning of the formation of the utility model.

[0014] Attachment Figure 4 This is a schematic diagram of the utility model after molding.

[0015] Attachment Figure 5 This is the initial working state diagram of the utility model.

[0016] Attachment Figure 6 For attachment Figure 5 AA cross-section schematic diagram of Example 1.

[0017] Attachment Figure 7 For attachment Figure 5 AA cross-section schematic diagram of Example 2.

[0018] Attachment Figure 8 This is a diagram of the termination working state of the utility model.

[0019] In the accompanying drawings, 1. L-shaped lower tire mold, 1-1. lower tire mold shaft, 2. base, 2-1. slide rail, 3. upper punch, 4. upper punch control plate, 5. control support rod, 5-1. support rod return spring, 6. control plate return spring, 7 metal raw material. DETAILED DESCRIPTION

[0020] Referring to the accompanying drawings, the forming mold includes: a base, a lower tire mold and an upper punch mold.

[0021] The lower tire mold comprises: a pair of L-shaped lower tire molds 1 arranged symmetrically;

[0022] The pair of L-shaped lower tire molds 1 are symmetrically installed to form a lower tire mold structure with a complete U-shaped inner cavity. The pair of L-shaped lower tire molds 1 are respectively rotatably installed on the base 2 via the lower tire mold rotating shaft 1-1, forming a pair of L-shaped lower tire molds 1 that can be relatively rotated by a designed angle via the lower tire mold rotating shaft 1-1.

[0023] The upper punch die 3 is installed on the upper punch die control plate 4, and the upper punch die control plate 4 and the base 2 form a guide sliding connection. A control plate reset spring 6 is arranged between the upper punch die control plate 4 and the base 2. The end face of the upper punch die 3 is a trapezoid with arc surfaces on the upper and lower end faces. The lower arc surface of the end face of the upper punch die 3 corresponds to the arc surface of a pair of L-shaped lower tire molds 1 symmetrically installed to form a complete U-shaped inner cavity.

[0024] An L-shaped lower tire mold 1 control support rod 5 is also provided on the base 2. The axis of the control support rod 5 is the center line of a pair of L-shaped lower tire molds 1 symmetrically installed to form a complete U-shaped inner cavity. The upper plane of the control support rod 5 contacts the bottom end of the pair of L-shaped lower tire molds 1. The control support rod 5 forms a sliding plug-in structure with a designed stroke with the base 2 through the support rod return spring 5-1.

[0025] When the present invention is used, the metal raw material 7 is arranged on the upper end surface of the L-shaped lower tire mold 1.

[0026] The upper punch control board 4 drives the upper punch 3 to press the metal raw material 7 into a pair of L-shaped lower tire molds 1 symmetrically installed to form a complete U-shaped inner cavity (as shown in the attached figure). Figure 5 ), when the upper punch 3 continues to press down, under the action of the upper punch 3, a pair of L-shaped lower tire molds 1 rotate around the lower tire mold shaft 1-1 to form Figure 6 The U-shaped part in the L-shaped lower tire mold 1 is as shown in FIG. Figure 2 Shape (plastic deformation plus elastic deformation). When the U-shaped component leaves the present invention, the elastic deformation part of the U-shaped component (reserved elastic deformation recovery margin) is elastically deformed and restored, such as Figure 1 Shape (standard design shape).

[0027] The control support rod 5, through the support rod return spring 5-1, forms a designed stroke with the base 2, enabling the upper punch 3 to control the pair of L-shaped lower tire molds 1 to rotate around the lower tire mold rotation axis 1-1. The value of this angle is determined by the recovery margin of the reserved elastic deformation determined by the physical properties of the U-shaped component. At the same time, when the upper punch 3 is raised, the control support rod 5, under the action of the support rod return spring 5-1, helps the pair of L-shaped lower tire molds 1 to rotate in the opposite direction and return to their original position around the lower tire mold rotation axis 1-1.

[0028] In the embodiment of the present invention, the base 2 is provided with a slide rail 2-1 of the upper punch control board 4, and the upper punch control board 4 is slidably connected to the slide rail 2-1. The slide rail 2-1 ensures the sliding accuracy of the upper punch control board 4.

Claims

1. A U-shaped metal part cold forming die, the forming die comprising: The base, the lower mold and the upper punch are characterized by: The lower tire mold comprises: a pair of symmetrically arranged L-shaped lower tire molds (1); The pair of L-shaped lower tire molds (1) are symmetrically installed to form a lower tire mold structure with a complete U-shaped inner cavity. The pair of L-shaped lower tire molds (1) are rotatably installed on the base (2) via the lower tire mold rotating shaft (1-1), forming a pair of L-shaped lower tire molds (1) that can be relatively rotated by a designed angle via the lower tire mold rotating shaft (1-1). The upper punch (3) is mounted on the upper punch control plate (4), the upper punch control plate (4) and the base (2) form a guide sliding connection, a control plate reset spring (6) is provided between the upper punch control plate (4) and the base (2), the end face of the upper punch (3) is a trapezoid with upper and lower end faces being arc surfaces, the lower arc surface of the end face of the upper punch (3) corresponds to the arc surface of a pair of L-shaped lower tire molds (1) symmetrically installed to form a complete U-shaped inner cavity; The base (2) is also provided with an L-shaped lower tire mold (1) control support rod (5), the axis of the control support rod (5) is the center line of a pair of L-shaped lower tire molds (1) symmetrically installed to form a complete U-shaped inner cavity, the upper plane of the control support rod (5) contacts the bottom ends of the pair of L-shaped lower tire molds (1), and the control support rod (5) forms a sliding plug-in structure with a designed stroke with the base (2) through the support rod return spring (5-1).

2. A U-shaped metal component cold forming die according to claim 1, characterized in that: A slide rail (2-1) of an upper punch die control panel (4) is provided on the base (2), and the upper punch die control panel (4) is slidably connected to the slide rail (2-1).

Images