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Mechanical-solid phase composite connection device and connection method thereof

A solid-phase composite and connecting device technology, applied in metal processing equipment, metal processing, manufacturing tools, etc., can solve the problems of low friction spot welding efficiency, reduce feed resistance, and speed up the process, so as to improve the connection efficiency, reduce The effect of riveting force and improving joint strength

Active Publication Date: 2016-04-13
SHANGHAI JIAOTONG 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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  • Mechanical-solid phase composite connection device and connection method thereof

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Embodiment 1

[0036] Such as figure 1As shown, this embodiment provides a mechanical-solid phase composite connection device, including: a driving pin 1, a blank holder ring 2, a number of spring disc positioning mechanisms 3, a semi-tubular rivet 4 and a die 5, wherein: a blank holder The ring 2 and the die 5 are arranged from top to bottom, and the plate 6 is arranged between the blank holder ring 2 and the die 5 . The driving needle 1 is sleeved in the blank holder 2, several 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 connected with the spring disc positioning mechanism 3-phase contact, driving pin 1, blank holder 2, semi-tubular rivet 4 and die 5 are arranged coaxially.

[0037] The inner diameter of the blank holder 2 is 10.4 mm, the outer diameter is 22.4 mm, and an annular groove with a width of 7.1 mm and a depth of 1.8 mm is provided inside it fro...

Embodiment 2

[0063] The plate 6 in this embodiment is: magnesium alloy AZ31+magnesium alloy AZ31; 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 feed speed is 10mm / s; In the lock forming stage, the rotation speed of the driving needle 1 is 1600r / min, and the feed speed is 5mm / s; in the in-situ stirring stage, the rotation speed is maintained at 1600r / min for 60ms.

[0065] Other implementation modes of this embodiment are the same as Embodiment 1.

Embodiment 3

[0067] The plate 6 in this embodiment is: aluminum alloy AA6061-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 1 is 60r / min, and the feed speed is 10mm / s; In the lock forming stage, the rotation speed of the driving needle 1 is 1200r / min, and the feed speed is 5mm / s; there is no in-situ stirring stage.

[0069] Other implementation modes of this embodiment are the same as Embodiment 1.

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Abstract

The invention discloses a mechanical-solid-phase composite connection device. A blank holder and a die are arranged from top to bottom, a plate is arranged between the binder ring and the die, and a driving pin is sleeved inside the binder ring. The spring disc positioning mechanism is radially and horizontally distributed in the blank holder, and the semi-hollow rivet is vertically placed in the blank holder and is in contact with the spring disc positioning mechanism. The driving pin, blank holder, semi-hollow rivet and die are the same axis settings. The invention also discloses its connection method, using several spring disc positioning mechanisms to realize accurate positioning and stable driving of the semi-hollow rivets, improving process stability and reliability; using semi-hollow rivets instead of solid stirring pins, reducing the riveting force and improving The connection efficiency eliminates the concave hole in the process of friction stir spot welding, and at the same time realizes the mechanical-solid phase double connection and improves the static and dynamic mechanical properties of the joint. This method can be applied not only to the connection of light alloys such as aluminum and magnesium, but also to the connection of non-metallic materials such as composite materials and plastics.

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 connection process has the advantages of high production efficiency, simple operation, no need for filling materials, and easy automation. However, light alloys such as aluminum and magnesium have characteristics such as extremely strong oxidation ability, small resistivity, large thermal conductivity and specific heat capacity, large linear expansion coefficient, and easy formation of pores, making it difficult to use traditional resistors. Spot welding process for connection. Composite materials and plastics cannot be connected by soldering at all because they do not conduct electricity. [0003] Aiming...

Claims

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Application Information

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Patent Type & Authority Patents(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 JIAOTONG UNIV
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