45-degree pressing die and flanging machine

Abstract

The utility model discloses a 45-degree pressing die and a flanging machine, and belongs to the technical field of flanging machine pressing dies. The 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, and the diameter of the first contact part is gradually reduced from one end of the second contact part to the other end of the second contact part. The diameter of the second contact part is the same as that of the first contact part, and the diameter of the third contact part is gradually increased from one end of the second contact part to the mounting end. When the flanging device is used, a metal pipe expands and extends to the inclination angle of the first contact part through the first contact part, then passes through the second contact part and is subjected to secondary extrusion through the third contact part, and compared with the prior art, flanging operation at different angles is achieved through two steps of actions, the flanging precision is improved, and the production efficiency is improved. And the occurrence probability of pipe cracks is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of edge bending machine pressing dies, in particular to a 45-degree pressing die and an edge bending machine. Background Art

[0002] In the metal pipe production process, metal pipes often need to be edged. Metal pipe edged is the edge processing of the pipe end of metal pipes (such as steel pipes, stainless steel pipes, etc.) to make them meet specific shape or size requirements. It is usually used to improve the connection performance, sealing performance or aesthetics of metal pipes to meet the needs of different industries and application scenarios.

[0003] The metal tube bending mechanisms currently available on the market mainly bend the metal tube to 45° in one step, which can easily cause tube cracks, affect product quality, and fail to achieve the required accuracy and pass rate for bend bending. Utility Model Content

[0004] The utility model provides a 45° pressing die and edge bending machine, which can overcome certain defects of the prior art.

[0005] According to a 45° die of the utility model, it 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 along the axial direction of the die body, which contact the inner wall of the metal tube in sequence, the first contact portion is formed with a diameter gradually decreasing from one end of the second contact portion to the other end, the second contact portion is arranged in a cylindrical shape, and the third contact portion is formed with a diameter gradually expanding from one end of the second contact portion to the mounting end.

[0006] Preferably, the inclination of the first contact portion is smaller than that of the third contact portion, and the inclination of the third contact portion is 45°.

[0007] Preferably, the cross-sectional shapes of the first contact portion and the third contact portion perpendicular to the axial direction of the die body are circular, and the first contact portion and the third contact portion are both truncated cone-shaped as a whole.

[0008] Preferably, the cross-sectional shapes of the first contact portion and the third contact portion perpendicular to the axial direction of the die body are regular polygons, and the first contact portion and the third contact portion are both regular pyramidal in shape as a whole.

[0009] Preferably, the cross-section of the second contact portion perpendicular to the axial direction of the die body is circular, and the second contact portion is cylindrical as a whole.

[0010] Preferably, the cross-sectional shape of the second contact portion perpendicular to the axial direction of the die body is a regular polygon, and the second contact portion is in the shape of a regular prism as a whole.

[0011] Preferably, an adjustment portion is provided between the punch end and the mounting end, and two adjustment rings are adjustable at the adjustment portion, and the two adjustment rings are used to adjust the length of the die body.

[0012] Preferably, the first contact portion and the metal tube are chamfered in an arc shape at corresponding positions.

[0013] Preferably, the connection points between the first contact portion and the second contact portion, and between the second contact portion and the third contact portion are both arranged with arc-shaped chamfers.

[0014] A flanging machine comprises any one of the above-mentioned 45° pressing dies.

[0015] The beneficial effects of the utility model are as follows:

[0016] When the present invention is in use, the metal tube is first expanded and extended to the inclined angle of the first contact part through the first contact part, then passes through the second contact part, and then is extruded for the second time through the third contact part. The metal tube that has been expanded and extended to the inclined angle of the first contact part is then expanded and extended to the inclined angle of the third contact part. Compared with the existing technology, the edge bending operation at different angles is divided into two steps, which improves the edge bending accuracy and greatly reduces the probability of tube cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a 45° die in Example 1;

[0018] Figure 2 Schematic diagram of the overall structure of the die in Example 2. DETAILED DESCRIPTION

[0019] 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.

[0020] Example 1

[0021] See also Figure 1 This embodiment provides a 45° die including a die body 100, the die body 100 having a punch end and a mounting end, the punch end being formed with a first contact portion 110, a second contact portion 120 and a third contact portion 130 along the axial direction of the die body, which contact the inner wall of the metal tube in sequence, the first contact portion 110 being formed with a diameter gradually decreasing from one end of the second contact portion 120 to the other end, the second contact portion 120 being arranged in a cylindrical shape, and the third contact portion 130 being formed with a diameter gradually expanding from one end of the second contact portion 120 to the mounting end.

[0022] When the present invention is in use, the die body 100 is installed on the extrusion ends at both ends of the edge bending machine, and the metal tube is sleeved on the die body 100 at the extrusion ends at both ends. The extrusion ends at both ends extrude the die body 100, and the metal tube is first expanded and extended through the first contact part 110 to the inclination angle of the first contact part 110, such as 25°, and then passes through the second contact part 120, and then is extruded for the second time through the third contact part 130. The metal tube after being expanded and extended to the inclination angle of the first contact part 110 is further expanded and extended to the inclination angle of 45° of the third contact part 130 to complete the edge bending operation. Compared with the existing technology, the edge bending operation at different angles is divided into two steps, which improves the edge bending accuracy and greatly reduces the probability of tube cracking.

[0023] In this embodiment, the inclination of the first contact portion 110 is smaller than that of the third contact portion 130 , and the inclination of the third contact portion 130 is 45°.

[0024] With the above structure, the metal pipe is firstly bend at a small angle, and then the bend is performed to reach the required bend angle through a secondary operation, which greatly reduces the probability of pipe cracking.

[0025] In this embodiment, the cross-sectional shapes of the first contact portion 110 and the third contact portion 130 perpendicular to the axial direction of the die body are circular, and the first contact portion 110 and the third contact portion 130 are both truncated cone-shaped as a whole.

[0026] In this embodiment, the cross-sectional shapes of the first contact portion 110 and the third contact portion 130 perpendicular to the axial direction of the die body are regular polygons, and the first contact portion 110 and the third contact portion 130 are both regular prism-shaped as a whole.

[0027] In this embodiment, the cross-section of the second contact portion 120 perpendicular to the axial direction of the die body is circular, and the second contact portion 120 is cylindrical as a whole.

[0028] In this embodiment, the cross-section of the second contact portion 120 perpendicular to the axial direction of the die body is a regular polygon, and the second contact portion 120 as a whole is in the shape of a regular prism.

[0029] Through the above structure, different die bodies 100 can be selected for use according to different edge turning requirements and application scenarios, thereby improving the use range and practicality of the die body 100.

[0030] Example 2

[0031] Seen in Figure 2 This embodiment also provides a 45° die, which differs from Example 1 in that an adjustment portion is provided between the punch end and the mounting end, and two adjustment rings 210 are adjustable at the adjustment portion. The two adjustment rings 210 are used to adjust the length of the die body 100.

[0032] Through the above structure, the length of the die body 100 can be adjusted according to different edge-folding requirements, thereby improving the applicability and practicality of the device.

[0033] In this embodiment, the first contact portion 110 and the metal tube are chamfered in an arc shape at corresponding locations.

[0034] In this embodiment, the connection points between the first contact portion 110 and the second contact portion 120 and between the second contact portion 120 and the third contact portion 130 are both configured with arc-shaped chamfers.

[0035] Through the above structure, the punch end can better bend the inner wall of the metal tube during the bend process, thereby improving the bend accuracy and reducing friction with the inner wall of the metal tube to avoid damage to the metal tube.

[0036] Example 3

[0037] A flanging machine having a 45° pressing die as described in either embodiment 1 or embodiment 2.

[0038] 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.

[0039] 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 45° 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 (110), a second contact portion (120) and a third contact portion (130) which are in contact with the inner wall of the metal tube in sequence along the axial direction of the die body, wherein the first contact portion (110) is formed by gradually reducing its diameter from one end of the second contact portion (120) toward the other end, the second contact portion (120) is arranged in a cylindrical shape, and the third contact portion (130) is formed by gradually expanding its diameter from one end of the second contact portion (120) toward the mounting end.

2. A 45° pressing die according to claim 1, characterized in that: The inclination of the first contact portion (110) is smaller than that of the third contact portion (130), and the inclination of the third contact portion (130) is 45°.

3. A 45° pressing die according to claim 1, characterized in that: The cross-sectional shapes of the first contact portion (110) and the third contact portion (130) perpendicular to the axial direction of the die body are circular, and the first contact portion (110) and the third contact portion (130) are both truncated cone-shaped as a whole.

4. A 45° pressing die according to claim 1, characterized in that: The cross-sectional shapes of the first contact portion (110) and the third contact portion (130) perpendicular to the axial direction of the die body are regular polygons, and the first contact portion (110) and the third contact portion (130) are both regular pyramidal in overall structure.

5. The 45° pressing die according to claim 1, characterized in that: The cross-sectional shape of the second contact portion (120) perpendicular to the axial direction of the die body is circular, and the second contact portion (120) is cylindrical in shape as a whole.

6. The 45° pressing die according to claim 1, characterized in that: The cross-sectional shape of the second contact portion (120) perpendicular to the axial direction of the die body is a regular polygon, and the second contact portion (120) is generally in the shape of a regular prism.

7. The 45° pressing die according to claim 1, characterized in that: An adjustment portion is also provided between the punch end and the mounting end. The adjustment portion is adjustable and provided with two adjustment rings (210). The two adjustment rings (210) are used to adjust the length of the die body (100).

8. The 45° pressing die according to claim 1, characterized in that: The first contact portion (110) is chamfered in an arc shape at a position corresponding to the metal tube.

9. The 45° pressing die according to claim 1, characterized in that: The connection points between the first contact portion (110) and the second contact portion (120), and between the second contact portion (120) and the third contact portion (130) are both arranged with arc-shaped chamfers.

10. A beveling machine, characterized in that: The invention comprises a 45° pressing die according to any one of claims 1 to 9.

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