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Machinery-solid phase composite connecting device and machinery-solid phase composite connecting method

A technology of solid-phase compounding and connecting devices, which is applied in the direction of metal processing equipment, metal processing, manufacturing tools, etc., can solve the problems of low efficiency of friction spot welding, reduce feed resistance, and speed up the process, so as to improve the connection efficiency and reduce the Effect of riveting force and improvement of joint strength

Active Publication Date: 2013-08-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a mechanical-solid phase composite connection device and its connection method. Based on the introduction of the solid-phase connection mechanism of the friction stir spot welding process, the high-speed rotation of the rivet generates frictional heat, which reduces the riveting force and greatly increases the elongation of the material, solving the problem of brittle metal riveting cracks; replacing the solid stirring pin with a semi-hollow rivet , reduce the feed resistance, speed up the process, solve the problems of low friction spot welding efficiency and residual process holes, and finally realize the mechanical-solid phase double connection of joints

Method used

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  • Machinery-solid phase composite connecting device and machinery-solid phase composite connecting method

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Embodiment l

[0036] As shown in FIG. 1, the present embodiment provides a mechanical-solid phase composite connection device, including: a driving needle 1, a blank holder 2, a plurality of spring disc positioning mechanisms 3, a semi-hollow rivet 4 and a female die 5, wherein : The blank holder 2 and the die 5 are set from top to bottom, and the plate 6 is set between the blank holder 2 and the die 5 . The driving needle 1 is sleeved in the blank holder 2, a plurality of spring disc positioning mechanisms 3 are radially and horizontally distributed in the blank holder 2, and the semi-hollow rivets 4 are vertically placed in the blank holder 2 and are connected with the spring disc positioning mechanism. 3 are in contact, the driving needle 1, the blank holder 2, the semi-hollow rivet 4 and the female die 5 are coaxially arranged.

[0037] The inner diameter of the blank holder 2 is 10.4 mm and the outer diameter is 22.4 mm, and an annular groove with a distance of 3.5 mm from the bottom end...

Embodiment 2

[0063] The plate 6 in this embodiment is: magnesium alloy AZ3l+magnesium alloy AZ3l; plate thickness matching: 2mm+2mm;

[0064] The process parameters of this embodiment: in the meshing stage, the rotation speed of the driving needle 1 is 60r / min, and the feeding speed is 10 mm / s; in the puncturing stage, the rotation speed of the driving needle 1 is 1000r / min, and the feeding speed is 2am / s; In the lock forming stage, the rotation speed of the driving needle l is 1600r / min, and the feeding speed is 5mm / s; in the in-situ stirring stage, the rotation speed is maintained at 1600r / min and maintained for 60ms.

[0065] Other implementations of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0067] The plate 6 in this embodiment is: aluminum alloy AA606l-T6+carbon fiber composite material; plate thickness matching: 2mm+2mm;

[0068] The process parameters of this embodiment: in the meshing stage, the rotation speed of the driving needle l is 60 r / min, and the feeding speed is 10 mm / s; in the puncturing stage, the rotation speed of the driving needle l is 800 r / min, and the feeding speed is 2 mm / s; In the lock forming stage, the rotation speed of the driving needle l is 1200r / min, and the feeding speed is 5am / s; there is no in-situ stirring stage.

[0069] Other implementations of this embodiment are the same as those of Embodiment 1.

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Abstract

The invention discloses a machinery-solid phase composite connecting device. A blank holder and a female die are arranged from top to bottom, a plate is arranged between the blank holder and the female die, a drive needle is sleeved inside the blank holder, a plurality of spring wafer positioning mechanisms are radially and horizontally distributed in the blank holder, semitubular rivets are vertically arranged in the blank holder and is contacted with the spring wafer positioning mechanisms, and the drive needle, the blank holder, the semitubular rivets and the female die are coaxially arranged. The invention further discloses a machinery-solid phase composite connecting method, accurate positioning and stable driving of the semitubular rivets can be realized through utilizing the spring wafer positioning mechanisms, and process stability and reliability are improved; and solid mixing needles are replaced by the semitubular rivets, rivet force is reduced, joint efficiency is improved, process shrinkage holes through friction stir spot welding are eliminated and machinery-solid phase double connection can be realized at the same time, and static and dynamic mechanics performance of joints are improved. The machinery-solid phase composite connecting method can not only be used for connecting light alloy such as aluminum, magnesium and the like, but also be used for connecting non-metal materials such as composite materials, plastics and the like.

Description

technical field [0001] The invention relates to a method in the technical field of single-point connection of lightweight materials, in particular to a mechanical-solid phase composite connection device and a connection method thereof. Background technique [0002] The most widely used body panel assembly process in the automotive industry is resistance spot welding. This joining process has the advantages of high production efficiency, easy operation, no filler material, and easy automation. However, light alloys such as aluminum and magnesium are difficult to use with traditional resistors due to their strong oxidizing ability, small resistivity, large thermal conductivity and specific heat capacity, large linear expansion coefficient, and easy formation of pores. Spot welding process for connection. Composite materials and plastics cannot be connected by welding because they do not conduct electricity. [0003] In response to the connection problems of the above lightwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P11/00
CPCB21J15/027B29C65/0672B29C65/562B29C65/7437B29C66/1122B29C66/21B29C66/41B29C66/721B29C66/81429B29C66/8322B21J15/025
Inventor 李永兵楼铭李亚庭魏泽宇
Owner SHANGHAI JIAO TONG UNIV
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