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A kind of friction plug welding device and its friction plug welding method

A technology of plug welding and weldment, which is applied in the field of friction plug welding devices, can solve the problems of reducing the efficiency of plug welding, and achieve the effects of good compactness, excellent mechanical properties, and simple device structure

Active Publication Date: 2021-06-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional metal plug welding requires a more complicated plugging and unloading process and milling of the plug after welding, which greatly reduces the efficiency of plug welding

Method used

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  • A kind of friction plug welding device and its friction plug welding method
  • A kind of friction plug welding device and its friction plug welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] use as figure 1 The friction plug welding device for crystalline thermoplastics - high density polyethylene (HDPE) and aluminum alloy 2024 friction plug welding, specifically includes the following steps:

[0021] (1) Carry out decontamination treatment to the surfaces of the aluminum alloy 2024 weldment, the second through hole 10, the HDPE weldment and the HDPE stopper rod 9;

[0022] (2) Insert the HDPE stopper rod 9 into the second through hole 10, and fix the clamping plate 5, the aluminum alloy 2024 weldment and the HDPE weldment on the worktable from top to bottom, the first through hole 8 and the second The through holes 10 are coaxial, clamp the clamping rod 2 on the body 1, and adjust the connecting shaft 3 above the position to be welded;

[0023] (3) The rotating connecting shaft 3 passes through the first through hole 8 of the clamping plate 5 and moves vertically downward, the pressing speed is 5 mm / min, and the upper end of the HDPE stopper rod 9 is sque...

Embodiment 2

[0027] use as figure 1 The friction plug welding device for crystalline thermoplastics - polypropylene (PP) and magnesium alloy AZ91D friction plug welding, specifically includes the following steps:

[0028] (1) Carry out decontamination treatment to the surface of the magnesium alloy AZ91D weldment, the second through hole 10, the PP weldment and the PP stopper rod 9;

[0029] (2) Insert the PP stopper rod 9 into the second through hole 10, and fix the clamping plate 5, magnesium alloy AZ91D weldment and PP weldment on the worktable from top to bottom, the first through hole 8 and the second The through holes 10 are coaxial, clamp the clamping rod 2 on the body 1, and adjust the connecting shaft 3 above the position to be welded;

[0030] (3) The rotating connecting shaft 3 passes through the first through hole 8 of the clamping plate 5 and moves vertically downward, the pressing speed is 25 mm / min, and the upper end of the PP stopper rod 9 is squeezed and rubbed by the inn...

Embodiment 3

[0034] use as figure 1 The friction plug welding device for crystalline thermoplastics - polyamide (PA) and titanium alloy TC4 friction plug welding, specifically includes the following steps:

[0035] (1) carry out decontamination treatment to the surface of titanium alloy TC4 weldment, second through hole 10, PA weldment and PA stopper rod 9;

[0036] (2) Insert the PA stopper rod 9 into the second through hole 10, and fix the clamping plate 5, titanium alloy TC4 weldment and PA weldment on the worktable from top to bottom, the first through hole 8 and the second The through holes 10 are coaxial, clamp the clamping rod 2 on the body 1, and adjust the connecting shaft 3 above the position to be welded;

[0037] (3) The rotating connecting shaft 3 passes through the first through hole 8 of the clamping plate 5 and moves vertically downward, the pressing speed is 15 mm / min, and the upper end of the PA stopper rod 9 is squeezed and rubbed by the inner wall of the groove 4 to gr...

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Abstract

The invention discloses a friction plug welding device and a plug welding method thereof. The friction plug welding device includes a body, the body includes a clamping rod and a connecting shaft, grooves are arranged on the bottom end surface of the connecting shaft, and a clamping plate is sequentially lapped under the connecting shaft , metal weldment and thermoplastic weldment, a first through hole is arranged on the clamping plate, a second through hole for placing a stopper rod is arranged on the metal weldment, and the first through hole and the second through hole are coaxial. The friction plug welding method includes the following steps: a. surface decontamination treatment; b. inserting the stopper rod into the second through hole, and adjusting the connecting shaft above the position to be welded; c. filling the groove with the stopper rod; d. The rod rotates and frictionally fuses with the inner wall of the second through hole and the surface of the thermoplastic weldment; e, the welding is completed after the weldment is cooled. The device of the invention has a simple structure and is easy to manufacture, and a joint with good compactness and excellent mechanical properties can be obtained by using the plug welding method of the invention.

Description

technical field [0001] The invention belongs to the technical field of metal and plastic welding, in particular to a friction plug welding device and a friction plug welding method thereof. Background technique [0002] Due to the advantages of light weight and high specific strength, thermoplastics are more and more widely used in automobile manufacturing, aerospace and other fields, which makes the connection of thermoplastic components and metal components an inevitable process in the production process. The traditional metal and thermoplastic connection Technology, such as mechanical connection faces problems such as stress concentration in the connection area and overall weight increase of components; bonding faces problems such as adhesive volatilization and adhesive joints are greatly affected by the environment; new laser or friction stir spot welding joints are prone to porosity defects , and the joint connection strength is low. [0003] Friction plug welding is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/06
CPCB29C65/06B29C66/742B29C65/0672B29C65/601B29C66/71B29C66/7392B29C66/81431B29C66/8322B29K2055/02B29K2033/12B29K2025/06
Inventor 沈以赴严银飞黄国强倪瑞洋侯文涛李军平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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