90-degree flanging machine pressing die and flanging machine

Abstract

The utility model discloses a 90-degree flanging machine pressing die and a flanging machine, and belongs to the technical field of flanging machine pressing dies. The 90-degree flanging machine pressing die comprises a pressing die body, the pressing die body is provided with a punch end and an installation end, the punch end is provided with a first contact part, a second contact part and a third contact part which make contact with the inner wall of a metal pipe in sequence in the axial direction of the pressing die body, the second contact part is arranged in a cylindrical shape, and the third contact part is arranged in a cylindrical shape. The diameter of the first contact part is gradually reduced from one end of the second contact part, and the third contact part is a plane perpendicular to the second contact part. Compared with the prior art, the two ends, bent into 45 degrees in advance, of the metal pipe are subjected to 90-degree edge pulling operation in two steps, the problems that the metal pipe is directly bent into 90 degrees in one step, pipe cracks are easily caused, and the precision and the qualified rate required by edge pulling cannot be achieved are solved, the occurrence probability of the pipe cracks is reduced, the edge pulling precision is improved, and therefore the product quality is improved; the structure is simple, and manufacturing and maintenance are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of edge bending machine pressing dies, in particular to a 90-degree edge bending machine pressing die and an edge bending machine. Background Art

[0002] In the metal processing industry, especially in the field of pipe processing, bending or folding metal pipes into various shapes and angles is a common process requirement. In the metal pipe production process, metal pipes are often required to be folded.

[0003] The 90° metal tube bending mechanism currently available on the market mainly bends the two ends of the metal tube into 45° first, and then directly bends the metal tube into 90° in one step, which can easily cause tube cracks, affect product quality, and fail to achieve the required accuracy and pass rate for bending. Utility Model Content

[0004] The utility model provides a 90° bend machine die and a bend machine, which can overcome certain defects of the prior art.

[0005] According to the utility model, a 90° flanging machine die includes a die body, the die body has a punch end and a mounting end, the punch end is formed with a first contact portion, a second contact portion and a third contact portion which contact the inner wall of the metal tube in sequence along the axial direction of the die body, the second contact portion is arranged in a cylindrical shape, the first contact portion is formed by gradually reducing the diameter of one end of the second contact portion, and the third contact portion is a plane arranged perpendicular to the second contact portion.

[0006] Preferably, the inclination of the first contact portion is smaller than that of the third contact portion, and the inclination of the first contact portion is greater than 60 degrees.

[0007] With the above structure, the 45° end of the metal pipe is firstly bent, and then the metal pipe is bent to 90° through a secondary operation, thereby reducing the probability of pipe cracking.

[0008] Preferably, the first contact portion and the metal tube are chamfered in an arc shape at corresponding positions.

[0009] Preferably, the connection between the first contact portion and the second contact portion is arranged in an arc-shaped chamfer.

[0010] Through the above structure, during the flanging process, the punch end can better flanging the 45° end of the metal tube, thereby improving the flanging accuracy and reducing friction with the inner wall of the metal tube to avoid damage to the metal tube.

[0011] Preferably, the cross-section of the first contact portion perpendicular to the axial direction of the die body is circular, and the first contact portion is integrally formed in a truncated cone shape.

[0012] Through the above, in the initial stage of contact between the die and the inner wall of the metal tube, the contact area gradually increases, which helps to disperse the contact pressure and reduce local stress concentration, thereby protecting the inner wall of the metal tube from damage.

[0013] Preferably, the cross-section of the third contact portion perpendicular to the axial direction of the die body is circular, and the third contact portion is cylindrical as a whole.

[0014] Through the above, it is ensured that the edge of the metal tube can accurately reach a 90° folding angle during the folding process, providing a stable supporting surface.

[0015] A 90° bend machine die and a clamping die assembly, wherein the clamping die assembly is used to cooperate with the die body to perform a 90° bend operation.

[0016] The clamping assembly is a supporting component for the 90° bend operation of the metal tube. It is used to cooperate with the die body to perform the 90° bend operation, providing the necessary support and positioning functions to ensure that the die body can stably act on the metal tube during the processing.

[0017] The beneficial effects of the utility model are as follows:

[0018] Compared with the prior art, the utility model divides the 90° bending operation into two steps by pre-bending the two ends of the metal tube into 45°, thereby avoiding the problem that the metal tube is bent into 90° directly in one step, which is very likely to cause tube cracks and fail to meet the accuracy and qualified rate required for edge bending. The probability of tube cracks is reduced, the edge bending accuracy is improved, and thus the product quality is improved. At the same time, the utility model has a simple structure and is easy to manufacture and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a 90° bending machine die. DETAILED DESCRIPTION

[0020] In order to further understand the content of the present invention, the present invention is described in detail with reference to the embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0021] Example 1

[0022] See also Figure 1 The present embodiment provides a 90° bend machine die, which includes a die body 100. The die body 100 has a punch end and a mounting end. The punch end is formed with a first contact portion, a second contact portion and a third contact portion along the axial direction of the die body, which contact the inner wall of the metal tube in sequence. The second contact portion is cylindrical, the first contact portion is formed by gradually reducing the diameter of one end of the second contact portion, and the third contact portion is a plane perpendicular to the second contact portion.

[0023] Compared with the prior art, the utility model divides the 90° bending operation into two steps by pre-bending the two ends of the metal tube into 45°, thereby avoiding the problem that the metal tube is bent into 90° directly in one step, which is very likely to cause tube cracks and fail to meet the accuracy and qualified rate required for edge bending. The probability of tube cracks is reduced, the edge bending accuracy is improved, and thus the product quality is improved. At the same time, the utility model has a simple structure and is easy to manufacture and maintain.

[0024] Specifically, the two ends of the metal tube are pre-bent to 45 degrees and the 90 degree bending operation is performed in two steps. For example, the 45 degree end of the metal tube is first further bent to the angle of the first contact part, such as 70 degrees, and then the 70 degree end of the metal tube is bent to the third contact part angle, that is, 90 degrees.

[0025] In this embodiment, the inclination of the first contact portion is smaller than that of the third contact portion, and the inclination of the first contact portion is greater than 60 degrees.

[0026] With the above structure, the 45° end of the metal pipe is firstly bent, and then the metal pipe is bent to 90° through a secondary operation, thereby reducing the probability of pipe cracking.

[0027] In this embodiment, the first contact portion and the metal tube are chamfered in an arc shape at corresponding locations.

[0028] In this embodiment, the connection between the first contact portion and the second contact portion is configured to be an arc-shaped chamfer.

[0029] Through the above structure, during the flanging process, the punch end can better flanging the 45° end of the metal tube, thereby improving the flanging accuracy and reducing friction with the inner wall of the metal tube to avoid damage to the metal tube.

[0030] In this embodiment, the cross-section of the first contact portion perpendicular to the axial direction of the die body is circular, and the first contact portion is entirely in the shape of a truncated cone.

[0031] Through the above, in the initial stage of contact between the die and the inner wall of the metal tube, the contact area gradually increases, which helps to disperse the contact pressure and reduce local stress concentration, thereby protecting the inner wall of the metal tube from damage.

[0032] In this embodiment, the cross-section of the third contact portion perpendicular to the axial direction of the die body is circular, and the third contact portion is cylindrical as a whole.

[0033] Through the above, it is ensured that the edge of the metal tube can accurately reach a 90° folding angle during the folding process, providing a stable supporting surface.

[0034] Example 2

[0035] This embodiment also provides a beveling machine, which differs from Example 1 in that it has a 90° beveling machine die and a clamping assembly as described in Example 1, and the clamping assembly is used to cooperate with the die body 100 to perform a 90° beveling operation.

[0036] The clamping assembly is a supporting component for the 90° bend operation of the metal tube. It is used to cooperate with the die body to perform the 90° bend operation, providing the necessary support and positioning functions to ensure that the die body can stably act on the metal tube during the processing.

[0037] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0038] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The embodiments shown are only part of the embodiments of the present invention, and the actual structure is not limited to them. Therefore, if a person skilled in the art is inspired by the above and designs a structure and embodiment similar to the technical solution without creatively designing it without departing from the inventive purpose of the present invention, it shall fall within the scope of protection of the present invention.

Claims

1. A 90° beveling machine die, characterized in that: The invention comprises a die body (100), wherein the die body (100) has a punch end and a mounting end, wherein the punch end is formed with a first contact portion, a second contact portion and a third contact portion which contact the inner wall of the metal tube in sequence along the axial direction of the die body, wherein the second contact portion is arranged in a cylindrical shape, the first contact portion is formed by gradually reducing the diameter of one end of the second contact portion, and the third contact portion is a plane arranged perpendicular to the second contact portion.

2. The 90° beveling machine die according to claim 1, characterized in that: The inclination of the first contact portion is smaller than that of the third contact portion, and the inclination of the first contact portion is greater than 60 degrees.

3. The 90° beveling machine die according to claim 1, characterized in that: The first contact portion and the metal tube are arranged with arc-shaped chamfers at corresponding positions.

4. The 90° beveling machine die according to claim 1, characterized in that: The connection between the first contact portion and the second contact portion is arranged in an arc-shaped chamfer.

5. The 90° beveling machine die according to claim 1, characterized in that: The cross-section of the first contact portion perpendicular to the axial direction of the die body is circular, and the first contact portion is integrally formed in a truncated cone shape.

6. The 90° beveling machine die according to claim 1, characterized in that: The cross-section of the third contact portion perpendicular to the axial direction of the die body is circular, and the entire third contact portion is columnar.

7. A beveling machine, characterized in that: It comprises a 90° bend machine die and a clamping die body as described in any one of claims 1 to 6, wherein the clamping die body is used for cooperating with the die body (100) to perform a 90° bend operation.

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