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Embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars

A technology of locking structure and steering wheel, which is applied in the direction of steering control and handwheel installed on the car, can solve the problem of fracture of the two wings and ears of the spokes of the steering wheel skeleton, and achieve excellent experimental results, short production cycle and high locking force Stable and reliable effect

Active Publication Date: 2021-11-09
CHINA FIRST AUTOMOBILE +1
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solution to the problem of breakage of the two wings and ears of the spokes of the steering wheel when the magnesium alloy steering wheel frame is cold-bent and locked after the reinforcement is embedded

Method used

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  • Embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars
  • Embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars
  • Embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars

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Experimental program
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specific Embodiment

[0061] 1. Improvement of die casting mold:

[0062] Because the magnesium alloy steering wheel skeleton has a shrinkage of 8‰, by modifying the die-casting mold, the assembly gap of the steel bar embedded in the magnesium alloy steering wheel can be obtained at an assembly size of 0.04mm, which is the optimal assembly gap.

[0063] 2. Improvement of pressure jaw:

[0064] refer to Figure 7 According to the final compression curvature of the two lugs of the spokes, a dotted line is taken, and a steel sample is made by hand. When repairing, the pressure claws are removed, and the surface of the pressure claws is repaired with a pneumatic tool and the coloring embossing method. The 90° flat surface inside the claw can be changed to a curved surface tangent to r3 and r10 with a surface roughness of Ra0.8. The purpose is to obtain the minimum sliding resistance and good fluidity of the ears when they are bent.

[0065] The assembly gap between the improved magnesium alloy steer...

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Abstract

The invention belongs to the technical field of magnesium alloy cold bending, and relates to an embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars. The assembling gap between the magnesium alloy steering wheel spoke groove and the embedded steel bar is set to be within 1mm; preferably, the optimal choice of the assembly clearance is 0.04 mm; preferably, the fixed bending radius of the inner side of the magnesium alloy steering wheel is 3 mm. The invention discloses an embedded cold-bending locking structure and method for magnesium alloy steering wheel framework reinforcing steel bars. The method comprises the following steps: improving a die-casting die: modifying the assembly size of an assembly clearance of 0.04 mm obtained by the die-casting die; and performing improvement of a pressing claw of a pressing rivet die: changing a 90-degree straight surface in the pressing claw into a curved surface where r3 is tangent to r10; the key problem that fracture and deformation are prone to occurring during cold assembly of non-ferrous metal and black metal is effectively solved, and the experiment effect is excellent. The whole process is not only applied to the magnesium alloy steering wheel framework, but also has the advantages of short production period, rapidness, convenience, stable and firm locking force, no damage to the steering wheel, no deformation and the like.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy cold bending, and relates to a magnesium alloy steering wheel framework steel bar embedded cold bending locking structure and method. Background technique [0002] Die-casting magnesium alloy steering wheel frame embedding steel reinforcement technology is only considered for high-performance cars in the world. This steering wheel processing technology can improve the car's good shock absorption and stability when driving at high speeds and extreme road conditions. This die-casting The magnesium alloy steering wheel skeleton with advanced technology has the characteristics of high unit density, high safety factor, high fatigue strength and long service life. It is a combination of material forming technology and processing mechanics technology. It solves the problems of heavy steel steering wheel, poor shock absorption, poor comfort, and low fatigue strength in the past. It also solves the...

Claims

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Application Information

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IPC IPC(8): B62D1/04B22D17/22B22D17/24B22D19/02
CPCB62D1/04B22D17/22B22D17/24B22D19/02
Inventor 王家飞贾振江张荣奇贾博王自坚宋贺
Owner CHINA FIRST AUTOMOBILE
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