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Method for manufacturing dissimilar aluminum alloy composite automobile hub

A technology of dissimilar aluminum alloy and manufacturing method, which is applied to manufacturing tools, metal processing equipment, non-electric welding equipment, etc., can solve the problems of heat concentration at the axle, slow solidification speed, and coarse grains, so as to improve overall performance and simplify production. Process, the effect of simplifying the welding jig

Inactive Publication Date: 2011-08-17
GUANGZHOU RES INST OF NON FERROUS METALS
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Problems solved by technology

However, the hub produced by low-pressure casting has the following problems: 1. The heat is concentrated at the hub, the solidification speed is slow, and the crystal grains are coarse, which becomes the part with the worst mechanical properties of the entire hub; The difference in wall thickness greatly restricts the improvement of the overall performance of the hub
However, the spokes and rims of the existing two-piece wheel hub and three-piece wheel hub are all connected by bolts. Although it is convenient and fast, the overall weight of the wheel hub will undoubtedly be increased by the bolt connection, which is not conducive to the lightweight of the automobile wheel hub. Therefore, Using advanced friction stir welding to complete the connection of spokes and rims is the leading direction for the development of two-piece hub products

Method used

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  • Method for manufacturing dissimilar aluminum alloy composite automobile hub
  • Method for manufacturing dissimilar aluminum alloy composite automobile hub
  • Method for manufacturing dissimilar aluminum alloy composite automobile hub

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Embodiment Construction

[0022] The manufacturing method of heterogeneous aluminum alloy composite automobile wheel hub of the present invention, comprises the following steps:

[0023] First, manufacture the wheel rim 1, the method and steps are as follows: First, use the annealed (O state) 6061 deformed aluminum alloy plate to roll into a "D" shaped cylinder, such as image 3 As shown; Then, put the "D" shaped cylinder on the special fixture and perform flat longitudinal seam welding on it by friction stir welding. The welding process is that the rotation speed of the stirring head is 1200r / min, and the walking speed of the workpiece is 300~ 400mm / min; Next, roll the "D"-shaped cylinder into a circular cylinder; then, put the circular cylinder on a horizontal spinning machine and spin it into rim 1; finally, perform T6 heat treatment on rim 1 , the heat treatment specification is: 535°C for 4 hours + water quenching, water quenching requires water temperature not lower than 80°C, and water should be...

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Abstract

The invention discloses a method for manufacturing a dissimilar aluminum alloy composite automobile hub. The method comprises the following steps of: manufacturing a rim; manufacturing a spoke of which the outer diameter is slightly greater than the inner diameter of the rim; heating the rim, and pressing the spoke into a mold provided with a positioning device to be in clearance assembly with the rim; and performing friction stir spot welding by dividing the rim and the spoke subject to clearance assembly into a plurality of points according to peripheries. The spoke and the rim are assembled in a clearance fit manner, so the spoke and the rim are firmly bonded without being welded; and the spoke and the rim are connected through stir friction spot welding, the method has less thermal influence on the texture and the performance of the hub than friction stir welding and girth welding, and a welded junction of the dissimilar aluminum alloy composite automobile hub obtained through the method is not needed to be subjected to thermal treatment; therefore, a production technology is simplified, the overall performance of the hub is greatly improved, and the aim of losing the weight of the hub is fulfilled.

Description

technical field [0001] The invention relates to a method for manufacturing an automobile wheel hub, in particular to a method for manufacturing a heterogeneous aluminum alloy composite automobile wheel hub. Background technique [0002] At present, automobile lightweight has become an important research topic in the development of the global automobile industry. Reducing the weight of the wheel hub can effectively reduce energy consumption, improve the acceleration and braking performance of the vehicle, and improve driving comfort and safety. Aluminum alloy wheels have gradually replaced steel wheels due to their light weight, high manufacturing precision, high strength, small inertial resistance, strong heat dissipation, and good visual effects. [0003] At present, in the global car wheel market, the aluminization rate has reached more than 90%. According to the structure, aluminum alloy wheels can be divided into one-piece, two-piece and three-piece structures. Among t...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23K20/12
Inventor 戚文军王海艳农登宋东福张新颖李新国郑飞燕周楠
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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