Die structure for reversely bending side face of U-shaped part

Abstract

The utility model relates to a processing mould, in particular to a mould structure for reversely bending the side surface of a U-shaped part, which comprises an upper mould insert core, a lower mould insert core and a lower mould insert core, the lower die insert core is provided with a second mounting hole matched with the first mounting hole in position, the first mounting hole and the second mounting hole are coaxially arranged, and an inclined wall protruding towards the upper die insert core is arranged at the hole edge, close to the first mounting hole, of the lower die insert core; the forming punch comprises a body and a punch head, the body penetrates through the first mounting hole, the punch head is arranged at the tail end, facing the lower die insert, of the body, and the punch head is provided with a first bending section, a second bending section and a third bending section which are sequentially connected in the direction away from the body; the inclined wall, the first bent section and the second bent section are used for extruding the U-shaped part. Through the multi-section design of the forming punch and the cooperation of the inclined wall of the lower die insert core, a through hole of a U-shaped part can be directly punched in the vertical direction, stability is high, and one-time forming can be achieved.

Description

Technical Field

[0001] This utility model relates to a processing mold, and more particularly to a mold structure for reverse bending of the side of a U-shaped part. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] There is a U-shaped part with pre-drilled through holes. The edge of the through holes needs to be further processed. Specifically, it needs to be bent into a ring structure with outward irregular protrusions. The existing processing method is generally to stamp it with a mold. However, considering its multi-segment structure, it is difficult to form it in one step, which affects the processing efficiency. In addition, some molds use side stamping, which has poor stability.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] The purpose of this invention is to provide a mold structure for the side reverse bending of U-shaped parts. It can directly punch the through hole of the U-shaped part by designing the forming punch in a multi-segment manner and cooperating with the inclined wall of the lower die insert in the vertical direction. It has high stability and can be formed in one step.

[0006] To achieve the above objectives, this utility model discloses a mold structure for side reverse bending of a U-shaped part, wherein the U-shaped part has a through hole, and the mold structure for side reverse bending of the U-shaped part includes:

[0007] The upper mold insert has a bottom surface for abutting the top surface of the U-shaped part, and the upper mold insert has a first mounting hole.

[0008] The lower mold insert has a top surface that abuts against the bottom surface of the U-shaped part. The lower mold insert has a second mounting hole that matches the position of the first mounting hole. The first mounting hole and the second mounting hole are coaxially arranged. The lower mold insert has an inclined wall that protrudes towards the upper mold insert near the edge of the first mounting hole.

[0009] A forming punch, comprising a body and a punch head, wherein the body is disposed through the first mounting hole, and the punch head is disposed at the end of the body facing the lower die insert, and the punch head has a first bending section, a second bending section, and a third bending section connected in sequence away from the body.

[0010] The inclined wall, the first bending section, and the second bending section are respectively used to extrude the through hole position of the U-shaped part before the upper mold insert and the lower mold insert close the mold.

[0011] As a further description of the above technical solution, the size of the connection between the first bending segment and the body matches the diameter of the first mounting hole, the third bending segment matches the diameter of the second mounting hole, and the second bending segment is inclined from the first bending segment to the third bending segment.

[0012] As a further description of the above technical solution, when the upper mold insert and the lower mold insert are closed, the inclined wall, the first bending segment, and the second bending segment surround and form a bending space of a preset size.

[0013] As a further description of the above technical solution, the two sides of the forming punch are provided with a combination of the first bending segment, the second bending segment and the third bending segment, and the lower die insert is provided with a pair of inclined walls near the edge of the first mounting hole.

[0014] As a further description of the above technical solution,

[0015] As a further description of the above technical solution, the upper mold insert is provided with two spaced-apart first mounting holes, the lower mold insert is provided with two corresponding second mounting holes, and two forming punches are provided between the upper mold insert and the lower mold insert, so that the mold structure for the side reverse bending of one U-shaped part can be used to process two U-shaped parts simultaneously.

[0016] As a further description of the above technical solution, the mold structure for the side reverse bending of the U-shaped part also includes a stripper insert, which passes through the upper mold insert and is positioned towards the top surface of the U-shaped part.

[0017] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0018] The mold structure for the side reverse bending of the U-shaped part of this utility model can be achieved through the multi-segment design of the forming punch. Specifically, the first bending segment and the second bending segment can be used to directly extrude the through hole position of the U-shaped part, and in conjunction with the inclined wall of the lower die insert, directly punch the through hole of the U-shaped part in the vertical direction. This allows for multi-directional limiting force to be applied to the through hole position of the U-shaped part during the single mold closing process of the upper die insert and the lower die insert, enabling the through hole to be bent and formed in one step with high stability.

[0019] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional schematic diagram of a mold structure for side reverse bending of a U-shaped part provided in the embodiments of this specification;

[0022] Figure 2 This is a partially enlarged view of a mold structure for the side reverse bending of a U-shaped part provided in the embodiments of this specification;

[0023] Figure 3 This is a three-dimensional schematic diagram of a mold structure for the side reverse bending of a U-shaped part provided in the embodiments of this specification;

[0024] In the picture:

[0025] 100. U-shaped parts;

[0026] 1. Upper mold insert; 11. First mounting hole;

[0027] 2. Lower mold insert; 21. Second mounting hole; 22. Sloping wall;

[0028] 3. Forming punch; 31. Body; 32. Punch head; 321. First bending section; 322. Second bending section; 323. Third bending section;

[0029] 4. Remove the plate and insert the piece. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0032] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0033] Please see Figure 1-2 This embodiment provides a mold structure for the side reverse bending of a U-shaped part, wherein the U-shaped part 100 has a through hole, and the mold structure for the side reverse bending of the U-shaped part includes:

[0034] The upper mold insert 1 has a bottom surface for abutting the top surface of the U-shaped part 100, and the upper mold insert 1 has a first mounting hole 11.

[0035] The lower mold insert 2 has a top surface that abuts against the bottom surface of the U-shaped part 100. The lower mold insert 2 has a second mounting hole 21 that matches the position of the first mounting hole 11. The first mounting hole 11 and the second mounting hole 21 are coaxially arranged. The lower mold insert 2 has an inclined wall 22 that protrudes towards the upper mold insert 1 at the edge of the hole near the first mounting hole 11.

[0036] The forming punch 3 includes a body 31 and a punch 32. The body 31 is provided with a first mounting hole 11. The punch 32 is provided at the end of the body 31 facing the lower die insert 2. The punch 32 has a first bending section 321, a second bending section 322, and a third bending section 323 connected in sequence in a direction away from the body 31.

[0037] Among them, the inclined wall 22, the first bending section 321, and the second bending section 322 are used to extrude the through hole position of the U-shaped part 100 before the upper mold insert 1 and the lower mold insert 2 are closed.

[0038] With the above structure, during use, the operator only needs to pre-place the U-shaped part 100 between the upper die insert 1 and the lower die insert 2, and then start the operation, so that the upper die insert 1 and the lower die insert 2 move closer to each other and close the mold, and the forming punch 3 simultaneously punches the U-shaped part 100. In the above process, the third bending section 323 of the punch 32 of the forming punch 3 first penetrates into the first mounting hole 11, and the second bending section 322 extrudes radially along the axial direction to compress the through hole of the U-shaped part 100. At the same time, the inclined wall 22 of the lower die insert 2 first contacts the bottom surface of the U-shaped part 100 and applies an upward compressive force to the corresponding position. In the above process, the metal at the edge of the hole of the U-shaped part 100 deforms until the end of the metal material is close to the first bending section 321. Specifically, In the above process, the size of the connection between the first bending segment 321 and the body 31 matches the diameter of the first mounting hole 11, forming a sealed space above it. The third bending segment 323 matches the diameter of the second mounting hole 21, forming a sealed space below it. The second bending segment 322 is inclined from the first bending segment 321 to the third bending segment 323. Therefore, during the downward movement of the forming punch 3, the third bending segment 323 forms the main wall surface that applies deformation force to the hole edge. Based on the above structure, when the upper die insert 1 and the lower die insert 2 close, the inclined wall 22, the first bending segment 321, and the second bending segment 322 surround and form a bending space of a preset size. The size of this bending space is actually the final shape size of the U-shaped part 100 after bending.

[0039] With the above structure, the multi-segment design of the forming punch allows for direct extrusion of the through hole position of the U-shaped part 100 through the first bending segment 321 and the second bending segment 322. In conjunction with the inclined wall 22 of the lower die insert 2, the through hole of the U-shaped part 100 is directly punched in the vertical direction. This enables multi-directional limiting force to be applied to the through hole position of the U-shaped part 100 during the single mold closing process of the upper die insert 1 and the lower die insert 2. The through hole can be bent and formed in one step, resulting in high stability.

[0040] Furthermore, the forming punch 3 has a pair of first bending sections 321, second bending sections 322, and third bending sections 323 mirror-imagely arranged on both sides, and the lower die insert 2 has a pair of inclined walls 22 mirror-imagely arranged near the edge of the first mounting hole 11. That is to say, in this embodiment, the bending of both sides of the through hole of the U-shaped part 100 can be achieved in one stroke by using a single forming punch 3 and lower die insert 2, thereby improving processing efficiency.

[0041] Furthermore, the upper die insert 1 is provided with two spaced-apart first mounting holes 11, and the lower die insert 2 is provided with two corresponding second mounting holes 22. Two forming punches 3 are provided between the upper die insert 1 and the lower die insert 2, so that the die structure for the side bending of a U-shaped part can be used to process two U-shaped parts 100 simultaneously. This design is an embodiment to meet the needs of mass production, and of course, more combinations can be set as needed.

[0042] Furthermore, the mold structure for the side reverse bending of the U-shaped part also includes a ejector plate insert 4, which passes through the upper mold insert 1 and is positioned towards the top surface of the U-shaped part 100. The ejector plate insert 4 is used to extend and eject the U-shaped part 100 after the stroke is completed and returned to its original position to achieve demolding or to prevent the U-shaped part 100 from sticking to the upper mold insert 1.

[0043] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0044] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0045] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A die structure for side-reverse bending of a U-shaped part having a through-hole, characterized by, The mold structure for reverse bending the side surface of the U-shaped part comprises: an upper die insert, a bottom surface of the upper die insert is used for abutting against a top surface of the U-shaped part, the upper die insert has a first mounting hole; a lower die insert, a top surface of the lower die insert is used for abutting against a bottom surface of the U-shaped part, the lower die insert has a second mounting hole which is matched with the position of the first mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, and the lower die insert is provided with an inclined wall which protrudes towards the upper die insert at a hole edge of the first mounting hole; a forming punch, the forming punch comprises a body and a punch head, the body is arranged through the first mounting hole, the punch head is arranged at a terminal end of the body which faces the lower die insert, and the punch head has a first bending section, a second bending section and a third bending section which are sequentially connected in a direction away from the body. The inclined wall, the first bending section and the second bending section are respectively used for extruding the position of a through hole of the U-shaped part before the upper die insert and the lower die insert are closed.

2. The U-shaped part side turn-up bending die structure according to claim 1, characterized by: The size of the connection between the first bending section and the body is matched with the hole diameter of the first mounting hole, the third bending section is matched with the hole diameter of the second mounting hole, and the second bending section is inclined from the first bending section to the third bending section.

3. The U-shaped part side turn-up bending die structure according to claim 1, characterized by: When the upper die insert and the lower die insert are closed, the inclined wall, the first bending section and the second bending section enclose a bending space with a preset size.

4. The U-shaped part side turn-up bending die structure according to claim 1, characterized by: A pair of the first bending section, the second bending section and the third bending section are mirror-imaged arranged on both sides of the forming punch, and a pair of the inclined wall is mirror-imaged arranged at the hole edge of the first mounting hole of the lower die insert.

5. The U-shaped part side turn-up bending die structure according to claim 1, characterized by: Two first mounting holes are arranged on the upper die insert in an interval, two second mounting holes are arranged on the lower die insert correspondingly, and two forming punches are arranged between the upper die insert and the lower die insert, so that the mold structure for reverse bending the side surface of the U-shaped part is used for simultaneously processing two U-shaped parts.

6. The U-shaped part side turn-up bending die structure according to claim 1, characterized by: The mold structure for reverse bending the side surface of the U-shaped part further comprises a stripping insert, the stripping insert is arranged through the upper die insert and faces the top surface of the U-shaped part.

Images