Automobile accessory metal pipe rolling flaring and wrinkle preventing die set

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By setting inner and outer rollers in the anti-wrinkle module for rolling and flaring metal tubes in automotive parts and controlling their movement through adjusting components, the wrinkling problem caused by uneven internal and external forces is solved, uniform force is achieved, and the flaring quality is improved.

CN224487430UActive Publication Date: 2026-07-14FUZHOU LINLI PRECISION MASCH CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: FUZHOU LINLI PRECISION MASCH CO LTD
Filing Date: 2025-07-08
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

During the rolling and flaring process of existing automotive metal tubing, the inner wall is subjected to radial extrusion by the mold, resulting in expansion deformation. Meanwhile, the outer wall, lacking constraint, experiences localized stress concentration, causing the material to become unstable under circumferential compressive stress, leading to wrinkles in the tubing.

Method used

The anti-wrinkle mechanism is adopted, with the inner roller contacting the inner wall and the outer roller contacting the outer surface. The movement of the slide is controlled by the adjustment component, so as to realize the synchronous rotation and movement of the inner and outer rollers, evenly distribute the radial pressure, and reduce the wrinkling phenomenon.

Benefits of technology

This achieves uniform stress distribution inside and outside the pipe fitting, reduces the wrinkling rate during the flaring process, and improves the flaring quality of metal pipe fittings.

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Figure CN224487430U_ABST

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Abstract

The utility model relates to the technical field of automobile parts metal pipe fitting processing, specifically to a kind of automobile parts metal pipe fitting roll expansion anti-wrinkle module, including motor shaft and anti-wrinkle mechanism, anti-wrinkle mechanism is arranged in one end of motor shaft, and anti-wrinkle mechanism includes mould head;Mould head is located in the one end setting of motor shaft, and connecting assembly is arranged between mould head and motor shaft, and the inner wall of mould head is slidably connected with three sliding seats.The utility model, by setting anti-wrinkle mechanism, by adjusting part one, let outer roller contact with the outer surface of pipe fitting, while inner roller two contact with the inner wall of pipe fitting, by motor shaft drive multiple outer rollers and inner rollers rotate, adjusting part two can control multiple outer rollers and inner rollers synchronous movement at this time, realize flaring operation, make radial pressure evenly distributed, reduce the incidence of wrinkle, improve automobile parts metal pipe fitting flaring quality.

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Description

Technical Field

[0001] This utility model relates to the field of automotive parts metal pipe processing technology, and in particular to an automotive parts metal pipe rolling and flaring anti-wrinkle module. Background Technology

[0002] In the processing of metal pipes for automotive parts, a rolling flaring device is used to flare the inlet pipes. By changing the shape of the pipe ends, it can meet the functional requirements of connection, sealing, assembly, etc. in different scenarios.

[0003] In daily work, it has been found that during the existing rolling and flaring process of metal tubes for automotive parts, the rolling die usually contacts the inner wall of the tube and then applies radial force to the tube to flare it. However, because the outer surface of the tube lacks an effective support structure, the internal and external forces are unbalanced during flaring. The inner wall is subjected to radial compression by the die, resulting in expansion deformation, while the outer wall, due to the lack of constraint, forms local stress concentration. This causes the material to become unstable under circumferential compressive stress, resulting in wrinkles in the tube. Utility Model Content

[0004] The purpose of this utility model is to solve the problem in the prior art where the inner wall is deformed by radial extrusion of the mold, while the outer wall is unconstrained and forms local stress concentration, causing the material to become unstable under circumferential compressive stress and resulting in wrinkles in the pipe fittings. Therefore, a roll forming and flaring anti-wrinkle module for automotive metal pipe fittings is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a rolling and flaring anti-wrinkle module for automotive metal tubing, comprising a motor shaft and an anti-wrinkle mechanism, wherein the anti-wrinkle mechanism is disposed at one end of the motor shaft and the anti-wrinkle mechanism includes a mold head;

[0006] The mold head is located at one end of the motor shaft, and a connecting assembly is provided between the mold head and the motor shaft. Three slide blocks are slidably connected to the inner wall of the mold head. Inner rollers are rotatably connected to the inner wall of each slide block, and a slider is slidably connected to the inner wall of each slide block. Outer rollers are rotatably connected to the inner wall of each slider. An adjustment part one is provided on the slide block to control the slider one. An adjustment part two is provided on the inner wall of the mold head to control the movement of multiple slide blocks. With the above components, during flaring, the existing equipment can drive the motor to move, and the motor shaft can drive the mold head to move, allowing multiple inner rollers to extend into the pipe and contact the inner wall. Then, the slider is controlled by the adjustment part one to move, allowing the outer rollers to contact the outer surface of the pipe. Subsequently, the motor shaft drives the mold head to rotate, and the inner and outer rollers rotate. At the same time, the adjustment part two can control the movement of the slide blocks to achieve radial extrusion and flaring. The inner and outer rollers can ensure that the pipe is subjected to uniform force inside and outside, reducing the phenomenon of wrinkles.

[0007] Preferably, the adjustment part includes a screw rotatably connected to the inner wall of the slide block. The screw is threadedly connected to the inner wall of the slider. A knob is fixedly connected to the upper end of the screw. Through the above components, the knob and the screw can be rotated, and the screw can drive the slider to move in the slide block. The position of the outer roller can be adjusted according to the thickness of the tube.

[0008] Preferably, the second adjustment part includes a sliding cavity and a cavity formed in the inner wall of the mold head. Multiple circular holes are formed in the cavity and communicate with the sliding cavity. A connector is rotatably connected to the inner wall of the cavity. A connecting pipe for connection to a gas supply device is installed on the surface of the connector. A piston rod is slidably connected to the inner wall of the sliding cavity. A spring is sleeved on the surface of the piston rod. Both ends of the spring are fixedly connected to the piston rod and the inner wall of the sliding cavity, respectively. A conical head is fixedly connected to one end of the piston rod. A pressing rod is fixedly connected to the surface of the slide block. A second spring is sleeved on the surface of the pressing rod. Both ends of the second spring are fixedly connected to the slide block and the inner wall of the mold head, respectively. Through the above components, gas is sequentially input into the cavity, the circular holes, and the sliding cavity via the gas supply device and the connecting pipe. The gas compresses the piston rod, causing it to move. The spring is stressed, causing the piston rod to move the conical head and push the pressing rod, which in turn moves the slide block, thus achieving the flaring operation.

[0009] Preferably, the extrusion rod includes a rod body and a roller, with the roller rotatably connected to the inner wall of the rod body.

[0010] Preferably, a sealing gasket is provided between the connector and the cavity.

[0011] Preferably, a guide rod is fixedly connected to the inner wall of the mold head, and the guide rod is slidably connected to the inner wall of the slide block. Through the above-mentioned components, the guide rod can improve the stability of the slide block when it moves.

[0012] Preferably, the connecting assembly includes a sleeve fixed to the surface of the mold head, the motor shaft being inserted into the inner wall of the sleeve, a rod being slidably connected to the inner wall of the sleeve, the rod being inserted into the inner wall of the motor shaft, and a spring three being sleeved on the surface of the rod. The two ends of the spring three are fixedly connected to the surfaces of the rod and the sleeve, respectively. With the above components, during installation, the rod can be inserted into the sleeve, and then the spring three can drive the rod to be inserted into the inner wall of the motor shaft, thus achieving installation and facilitating subsequent replacement of devices of different sizes.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by setting an anti-wrinkle mechanism, the outer roller is made to contact the outer surface of the pipe through the adjustment part one, while the inner roller two is made to contact the inner wall of the pipe. The motor shaft drives multiple sets of outer rollers and inner rollers to rotate. At this time, the adjustment part two can control multiple sets of outer rollers and inner rollers to move synchronously, realize the flaring operation, make the radial pressure evenly distributed, reduce the wrinkle occurrence rate, and improve the flaring quality of metal pipes for automotive parts.

[0015] 2. In this utility model, by setting a connecting component, the mold head and the motor shaft can be quickly assembled through the cooperation of the insert rod, insert sleeve and spring, which facilitates quick replacement operation in the future. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural diagram of a roll forming and flaring anti-wrinkle module for automotive parts metal tubes.

[0017] Figure 2 This utility model provides a side view of the structure of a roll-forming and flaring anti-wrinkle module for automotive metal tubing.

[0018] Figure 3 This utility model provides a cross-sectional structural diagram of a roll forming and flaring anti-wrinkle module for automotive parts metal pipes.

[0019] Figure 4 This utility model provides a schematic diagram of the auxiliary device structure of an anti-wrinkle rolling and flaring module for automotive parts metal pipes.

[0020] Figure 5 This utility model presents a partial structural diagram of the adjustment section two of a rolling and flaring anti-wrinkle module for automotive metal tubing.

[0021] Legend:

[0022] 1. Motor shaft; 2. Anti-wrinkle mechanism; 21. Mold head; 22. Slide block; 23. Adjustment part one; 231. Knob; 232. Screw; 24. Inner roller; 25. Outer roller; 26. Adjustment part two; 261. Connector; 262. Connecting pipe; 263. Slide cavity; 264. Piston rod; 265. Conical head; 266. Extrusion rod; 267. Round hole; 268. Spring one; 269. Cavity; 2610. Spring two; 27. Slider; 28. Guide rod; 3. Connecting assembly; 31. Sleeve; 32. Insert rod; 33. Spring three. Detailed Implementation

[0023] Please see Figure 1 - Figure 5This utility model provides a technical solution: a rolling and flaring anti-wrinkle module for automotive metal pipe fittings, including a motor shaft 1 and an anti-wrinkle mechanism 2. The anti-wrinkle mechanism 2 is disposed at one end of the motor shaft 1 and includes a mold head 21.

[0024] Specifically, the mold head 21 is located at one end of the motor shaft 1, and a connecting component 3 is provided between the mold head 21 and the motor shaft 1. Three slide blocks 22 are slidably connected to the inner wall of the mold head 21. Inner rollers 24 are rotatably connected to the inner wall of the slide blocks 22. Slider blocks 27 are slidably connected to the inner wall of the slide blocks 27. Outer rollers 25 are rotatably connected to the inner wall of the slider blocks 27. An adjustment part 23 is provided on the slide blocks 22 to control the slider 27. An adjustment part 26 is provided on the inner wall of the mold head 21 to control the movement of multiple slide blocks 22. A guide rod 28 is fixedly connected to the inner wall of the mold head 21 and is slidably connected to the inner wall of the slide blocks 22.

[0025] In this embodiment: During flaring, the existing equipment can drive the motor to move. The motor shaft 1 can drive the mold head 21 to move, allowing multiple inner rollers 24 to extend into the pipe and contact the inner wall. Then, the slider 27 is controlled to move by the adjustment unit 23, allowing the outer roller 25 to contact the outer surface of the pipe. Subsequently, the motor shaft 1 drives the mold head 21 to rotate, and the inner rollers 24 and outer rollers 25 rotate. At the same time, the adjustment unit 26 can control the slide 22 to move, realizing radial extrusion and flaring. The inner rollers 24 and outer rollers 25 can ensure that the pipe is subjected to uniform force inside and outside, reducing the phenomenon of wrinkles.

[0026] Specifically, the adjustment part 23 includes a screw 232 rotatably connected to the inner wall of the slide block 22, the screw 232 being threadedly connected to the inner wall of the slider 27, and a knob 231 being fixedly connected to the upper end of the screw 232.

[0027] In this embodiment: the knob 231 and the screw 232 can be rotated, and the screw 232 can drive the slider 27 to move in the slide block 22, and the position of the outer roller 25 can be adjusted according to the thickness of the pipe.

[0028] Specifically, the adjustment section 26 includes a sliding cavity 263 and a cavity 269 formed in the inner wall of the mold head 21. Multiple circular holes 267 are formed in the cavity 269, communicating with the sliding cavity 263. A connector 261 is rotatably connected to the inner wall of the cavity 269. A connecting pipe 262 for connection to an air supply device is mounted on the surface of the connector 261. A piston rod 264 is slidably connected to the inner wall of the sliding cavity 263. A spring 268 is sleeved on the surface of the piston rod 264, with both ends of the spring 268 respectively connected to… The piston rod 264 is fixedly connected to the inner wall of the slide cavity 263. A tapered head 265 is fixedly connected to one end of the piston rod 264. An extrusion rod 266 is fixedly connected to the surface of the slide block 22. A spring 2610 is sleeved on the surface of the extrusion rod 266. The two ends of the spring 2610 are fixedly connected to the inner walls of the slide block 22 and the mold head 21, respectively. A sealing gasket (not shown in the figure) is provided between the connector 261 and the cavity 269. The extrusion rod 266 includes a rod body and a roller. The roller is rotatably connected to the inner wall of the rod body.

[0029] In this embodiment: the gas supply device is connected to the connecting pipe 262, and the gas is sequentially input into the cavity 269, the round hole 267 and the sliding cavity 263. The gas compresses the piston rod 264 to move, the first spring 268 is stressed, the piston rod 264 drives the conical head 265 to move, and pushes the extrusion rod 266, which drives the slide 22 to move. The second spring 2610 is stressed, realizing the flaring operation. When the gas supply device releases gas, the first spring 268 and the second spring 2610 can drive the whole to perform a reset operation.

[0030] Specifically, the connecting component 3 includes a sleeve 31 fixed on the surface of the mold head 21, the motor shaft 1 is inserted into the inner wall of the sleeve 31, the inner wall of the sleeve 31 is slidably connected to a rod 32, the rod 32 is inserted into the inner wall of the motor shaft 1, and a spring 33 is sleeved on the surface of the rod 32, with the two ends of the spring 33 fixedly connected to the surfaces of the rod 32 and the sleeve 31 respectively.

[0031] In this embodiment: During installation, the insertion rod 32 can be inserted into the insertion sleeve 31, and then the spring 33 can drive the insertion rod 32 to be inserted into the inner wall of the motor shaft 1 to achieve installation, which facilitates the subsequent replacement of devices of different sizes.

[0032] Working principle: In use, the insertion rod 32 is first inserted into the insertion sleeve 31. Then, the spring 33 drives the insertion rod 32 to be inserted into the inner wall of the motor shaft 1, achieving installation. After installation, the existing equipment drives the motor and motor shaft 1 to move. The motor shaft 1 drives the mold head 21 to move, allowing multiple inner rollers 24 to extend into the pipe and contact the inner wall. Then, rotating the knob 231 and the screw 232 controls the movement of the slider 27, allowing the outer roller 25 to contact the outer surface of the pipe. Subsequently, the motor shaft 1 drives the mold head 21 to rotate, and the inner rollers... 24 and outer roller 25 rotate, while the gas supply device is connected to the connecting pipe 262, and gas is sequentially input into the cavity 269, the round hole 267 and the sliding cavity 263. The gas compresses the piston rod 264 to move, the first spring 268 is stressed, the piston rod 264 drives the conical head 265 to move, and pushes the extrusion rod 266, which drives the slide 22 to move, the second spring 2610 is stressed, realizing the flaring operation. When the gas supply device releases gas, the first spring 268 and the second spring 2610 can drive the whole to perform a reset operation, realizing the flaring operation and reducing the phenomenon of wrinkles.

Claims

1. A roll forming and flaring anti-wrinkle module for automotive metal tubing, comprising a motor shaft (1) and an anti-wrinkle mechanism (2), characterized in that: The anti-wrinkle mechanism (2) is located at one end of the motor shaft (1), and the anti-wrinkle mechanism (2) includes a mold head (21); The mold head (21) is located at one end of the motor shaft (1). A connecting assembly (3) is provided between the mold head (21) and the motor shaft (1). Three slide blocks (22) are slidably connected to the inner wall of the mold head (21). An inner roller (24) is rotatably connected to the inner wall of the slide block (22). A slider (27) is slidably connected to the inner wall of the slide block (27). An outer roller (25) is rotatably connected to the inner wall of the slider (27). An adjustment part (23) is provided on the slide block (22) to control the slider (27). An adjustment part (26) is provided on the inner wall of the mold head (21) to control the movement of multiple slide blocks (22).

2. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 1, characterized in that: The adjustment part (23) includes a screw (232) rotatably connected to the inner wall of the slide (22), the screw (232) being threadedly connected to the inner wall of the slider (27), and a knob (231) being fixedly connected to the upper end of the screw (232).

3. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 1, characterized in that: The second adjustment part (26) includes a sliding cavity (263) and a cavity (269) formed in the inner wall of the mold head (21). The cavity (269) has multiple round holes (267) connected to the sliding cavity (263). A connector (261) is rotatably connected to the inner wall of the cavity (269). A connecting pipe (262) for connection to an air supply device is mounted on the surface of the connector (261). A piston rod (264) is slidably connected to the inner wall of the sliding cavity (263). A spring (268) is fitted on the surface of the slide block (24). The two ends of the spring (268) are fixedly connected to the piston rod (264) and the inner wall of the slide cavity (263), respectively. A tapered head (265) is fixedly connected to one end of the piston rod (264). A pressing rod (266) is fixedly connected to the surface of the slide block (22). A spring (2610) is fitted on the surface of the pressing rod (266). The two ends of the spring (2610) are fixedly connected to the inner wall of the slide block (22) and the mold head (21), respectively.

4. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 3, characterized in that: The extrusion rod (266) includes a rod body and a roller, with the roller rotatably connected to the inner wall of the rod body.

5. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 3, characterized in that: A sealing gasket is provided between the connector (261) and the cavity (269).

6. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 1, characterized in that: The inner wall of the mold head (21) is fixedly connected to a guide rod (28), and the guide rod (28) is slidably connected to the inner wall of the slide block (22).

7. The anti-wrinkle rolling and flaring module for automotive metal tubing according to claim 1, characterized in that: The connecting assembly (3) includes a sleeve (31) fixed on the surface of the mold head (21), the motor shaft (1) is inserted into the inner wall of the sleeve (31), the inner wall of the sleeve (31) is slidably connected to a rod (32), the rod (32) is inserted into the inner wall of the motor shaft (1), and a spring three (33) is sleeved on the surface of the rod (32), the two ends of the spring three (33) are fixedly connected to the surfaces of the rod (32) and the sleeve (31) respectively.