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Method for punching and assembling safety column by punching distorted points

An assembly method and safe technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve problems such as hidden dangers of driver's life safety, product delivery, and large dispersion of pressure thresholds, and achieve consistent improvement in pass rate and performance. security, eliminate the hidden danger of personal safety, and ensure the effect of accuracy

Inactive Publication Date: 2005-07-06
HAFEI MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that due to the different diameter tolerances of the inner and outer sleeves and the different sizes of the deformation points of stamping, the degree of bonding of the inner and outer sleeves after stamping is very different, making the inner and outer sleeves shrink when they are stressed. The pressure threshold is highly dispersed and cannot meet the requirements of technical standards
Since the product will be scrapped once the pressure threshold is checked, it cannot be inspected one by one, but can only be inspected randomly, so it is likely to cause unqualified products to leave the factory, causing hidden dangers to the life safety of drivers

Method used

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  • Method for punching and assembling safety column by punching distorted points
  • Method for punching and assembling safety column by punching distorted points
  • Method for punching and assembling safety column by punching distorted points

Examples

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Embodiment

[0022] 1. A stamping assembly of a safety pipe column for a miniature car. The outer casing is made of a formed seamless steel pipe. Two rows of eight deformation punching points are stamped out by using a mold. Each row of 4 punching points is evenly distributed on the circumference. Two rows of punching points The axial distance is 52mm, and the punching point is guaranteed to have a rectangular size of 11.5×8mm. After punching, the distance between the inner end protrusions of the two deformation points along the same diameter is 31.5mm.

[0023] 2. Use a hard material mandrel with an outer diameter of φ31.7mm to forcibly pass through the inner diameter of the outer casing after stamping. At this time, because the outer diameter of the mandrel is slightly larger than the distance between the punching points after stamping, therefore , the dimension between the punch points on the outer casing becomes the outer diameter dimension of the inserted mandrel. Moreover, this proce...

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PUM

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Abstract

This invention relates to car steering wheel safety pipe matching method improvement in car parts matching technique. The invention comprises the following steps: inserting and fixing the core bar into the cover pipe; pressing the deformation points to use core shaft force through cover pipe inner diameter; directly pressing the inner cover pipe to the cover pipe.

Description

technical field [0001] The invention belongs to the assembly technology of automobile parts and relates to the improvement of the assembly method of the automobile steering wheel safety pipe column. Background technique [0002] Automobile steering wheel safety column is a structural part to reduce the injury caused by automobile accidents to the driver. When it is pressed by an external force exceeding the rated value, it can shrink inward to reduce the damage of the steering wheel to the driver in the event of a car accident. The existing assembly method is combined stamping method. In this process, the inner and outer sleeves are placed on the mold for axial positioning, and then a mandrel is inserted into the inner sleeve for positioning, and then a common punch is directly used to stamp deformation points on the outer sleeve to form them. The problem with this method is that due to the different diameter tolerances of the inner and outer sleeves and the different siz...

Claims

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Application Information

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IPC IPC(8): B23P19/02B23P19/027
Inventor 王春良徐欢
Owner HAFEI MOTOR