EGR pipe hydraulic forming tooling

Abstract

This utility model discloses a hydraulic forming fixture for EGR pipes, including two positioning seats; a forming punch assembly disposed at one end of the positioning seats; a moving part connected to the end of the positioning seats away from the forming punch assembly, which controls the movement of the forming punch assembly to form the pipe, and limit switches are provided on both sides of the moving part; a limiting mold disposed at the end of the forming punch assembly away from the positioning seats, used to position the pipe to be formed. The hydraulic forming fixture for EGR pipes of this utility model has a simple structure, pre-forming followed by forming, with two forming processes ensuring the forming effect and preventing product cracking; it also effectively improves production efficiency, reduces process costs, and ensures product quality requirements.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to EGR pipe hydraulic forming tooling. Background Technology

[0002] EGR pipes are a key component of exhaust gas recirculation systems, primarily used for the reuse of exhaust gases to reduce harmful gas emissions. Existing EGR pipe forming processes cannot guarantee product quality requirements, leading to frequent cracking during forming and inconsistent post-forming profiles necessitating trimming processes.

[0003] Based on the above-mentioned technical problems, those skilled in the art urgently need to develop an EGR pipe hydraulic forming tooling with a simple structure that can solve the product cracking problem, eliminate the trimming process, effectively improve production efficiency, and reduce process costs. Utility Model Content

[0004] The purpose of this invention is to provide an EGR pipe hydraulic forming fixture with a simple structure that can solve the product cracking problem, eliminate the trimming process, effectively improve production efficiency and reduce process costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses an EGR pipe hydraulic forming fixture, which includes:

[0007] Two positioning seats; and

[0008] A forming punch assembly located at one end of the positioning seat;

[0009] A moving part connected to the end of the positioning seat away from the forming punch assembly controls the movement of the forming punch assembly to form the tube, and limit switches are provided on both sides of the moving part;

[0010] The forming fixture also includes:

[0011] A limiting mold is located at the end of the forming punch assembly away from the positioning seat, and is used to position the pipe to be formed.

[0012] Furthermore, the moving part includes two hydraulic cylinders; and

[0013] The guide shaft is connected to the hydraulic cylinder via an adapter, and the other end of the guide shaft passes through the positioning seat and is connected to the forming punch assembly.

[0014] Furthermore, the forming punch assembly includes a forming punch and a pre-forming punch respectively disposed near the two positioning seats.

[0015] Furthermore, the limiting mold includes two parallel templates; and

[0016] A guide post assembly is provided between the two templates, and the distance between the two templates is adjusted by the guide post assembly;

[0017] Two cavities are provided between the two templates, and two inserts are provided at the junction of the two cavities. The two inserts correspond to the forming punch and the preforming punch, respectively, and the position of the pipe to be processed is controlled by the inserts.

[0018] Furthermore, the guide post assembly includes a guide post and a guide sleeve, and the distance between the two templates is adjusted by the cooperation of the guide post and the guide sleeve.

[0019] The EGR pipe hydraulic forming tooling provided by this utility model has the following beneficial effects in the above technical solution:

[0020] The EGR pipe hydraulic forming fixture of this utility model has a simple structure. It pre-forms first and then forms, and the two forming processes ensure the forming effect and prevent the product from cracking during forming. It also effectively improves production efficiency, reduces process costs, and ensures product quality requirements. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 Top view of the overall structure of the EGR pipe hydraulic forming tooling provided in this embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the limiting mold for the EGR pipe hydraulic forming tooling provided in this embodiment of the utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Two positioning seats; 2. Forming punch assembly; 3. Moving part; 4. Limit switch; 5. Limit mold;

[0026] 201. Forming punch; 202. Pre-forming punch;

[0027] 301. Hydraulic cylinder; 302. Adapter; 303. Guide shaft;

[0028] 501. Template; 502. Guide post assembly; 503. Cavity; 504. Insert. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] See Figures 1-2 As shown;

[0031] This utility model discloses an EGR pipe hydraulic forming fixture, which includes:

[0032] Two positioning seats 1; and

[0033] The forming punch assembly 2 is located at one end of the positioning seat 1;

[0034] A moving part 3 is connected to the end of the positioning seat 1 away from the forming punch assembly 2. The moving part 3 controls the movement of the forming punch assembly 2 to form the tube. Limit switches 4 are provided on both sides of the moving part 3.

[0035] The forming fixture also includes:

[0036] The limiting mold 5 is located at the end of the forming punch assembly 2 away from the positioning seat 1, and is used to position the pipe to be formed.

[0037] As a further description of this embodiment, the moving part 3 includes two hydraulic cylinders 301; and

[0038] The guide shaft 303 is connected to the hydraulic cylinder 301 via an adapter 302, and the other end of the guide shaft 303 passes through the positioning seat 1 and is connected to the forming punch assembly 2.

[0039] As a further description of this embodiment, the forming punch assembly 2 includes a forming punch 201 and a pre-forming punch 202 respectively disposed close to the two positioning seats 1.

[0040] As a further description of this embodiment, the limiting mold 5 includes two parallel templates 501; and

[0041] A guide post assembly 502 is disposed between the two templates 501, and the distance between the two templates 501 is adjusted by the guide post assembly 502;

[0042] Two cavities 503 are provided between the two templates 501, and two inserts 504 are provided at the junction of the two cavities. The two inserts 504 correspond to the forming punch 201 and the preforming punch 202 respectively, and the position of the pipe to be processed is controlled by the inserts 504.

[0043] As a further description of this embodiment, the guide post assembly 502 includes a guide post and a guide sleeve, and the distance between the two templates 501 is adjusted by the cooperation of the guide post and the guide sleeve.

[0044] The EGR pipe hydraulic forming fixture provided in this embodiment works on the following principle:

[0045] The guide post assembly 502 adjusts the upper and lower cavities 503 to clamp the pipe fittings. The hydraulic system controls the movement of the oil cylinder 301, the distance is controlled by the limit switch 4, and the position is controlled by the insert 504. First, the pre-forming punch 202 is used for pre-forming, and then the forming punch 201 is used for forming. The two forming processes ensure the forming effect and prevent cracking.

[0046] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An EGR pipe hydraulic forming tooling, characterized in that, The molding fixture includes: Two positioning seats (1); and A forming punch assembly (2) is provided at one end of the positioning seat (1); A moving part (3) connected to the end of the positioning seat (1) away from the forming punch assembly (2) controls the movement of the forming punch assembly (2) to form the tube, and limit switches (4) are provided on both sides of the moving part (3); The forming fixture also includes: A limiting mold (5) is located at one end of the forming punch assembly (2) away from the positioning seat (1) and is used to position the pipe to be formed.

2. The EGR pipe hydraulic forming tooling according to claim 1, characterized in that, The moving part (3) includes two hydraulic cylinders (301); and The guide shaft (303) is connected to the hydraulic cylinder (301) via an adapter (302), and the other end of the guide shaft (303) passes through the positioning seat (1) and is connected to the forming punch assembly (2).

3. The EGR pipe hydraulic forming tooling according to claim 1, characterized in that, The forming punch assembly (2) includes a forming punch (201) and a preforming punch (202) respectively disposed near the two positioning seats (1).

4. The EGR pipe hydraulic forming tooling according to claim 3, characterized in that, The limiting mold (5) includes two parallel templates (501); and A guide post assembly (502) is provided between the two templates (501), and the distance between the two templates (501) is adjusted by the guide post assembly (502); Two cavities (503) are provided between the two templates (501), and two inserts (504) are provided at the junction of the two cavities. The two inserts (504) correspond to the forming punch (201) and the preforming punch (202) respectively. The position of the pipe to be processed is controlled by the inserts (504).

5. The EGR pipe hydraulic forming fixture according to claim 4, characterized in that, The guide post assembly (502) includes a guide post and a guide sleeve, and the distance between the two templates (501) is adjusted by the cooperation of the guide post and the guide sleeve.

Images