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Method for improving positioning strength of built-in clamp

A strength and fixture technology, applied in the field of automobile body-in-white, which can solve the problem of insufficient positioning strength of built-in fixtures

Active Publication Date: 2020-06-12
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a method for improving the positioning strength of the built-in fixture, which resolves the influence of the gravity of the side panel assembly on the strength of the flipping positioning pin by increasing the support unit of the side panel assembly through the floor clamp, and solves the problem of insufficient positioning strength of the existing built-in fixture The problem

Method used

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  • Method for improving positioning strength of built-in clamp
  • Method for improving positioning strength of built-in clamp
  • Method for improving positioning strength of built-in clamp

Examples

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Embodiment Construction

[0017] A method for improving the positioning strength of a built-in fixture, the method comprising the following steps:

[0018] Step 1. Set the fixed positions of the first support unit and the second support unit on both sides of the center of gravity of the side panel assembly, and select the support position within the range of 1 / 4 threshold to 1 / 3 threshold from the center of gravity on both sides of the center of gravity;

[0019] Step 2. Calculate the support force F1 of the first support unit and the support force F2 of the second support unit according to the fixed positions of the first support unit and the second support unit, and calculate the support force F1 of the first support unit and the support force F2 of the second support unit The support force F2 selects the cylinder and the pressure control valve required by the first support unit and the second support unit;

[0020] refer to figure 1 , the supporting force F1 of the first supporting unit and the sup...

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Abstract

The invention belongs to the technical field of automobile bodies in white, and particularly relates to a method for improving positioning strength of a built-in clamp. The method comprises the following steps that 1, fixing positions of a first supporting unit and a second supporting unit are arranged on the two sides of gravity center of a side wall assembly; 2, the first supporting unit and thesecond supporting unit are designed and installed; 3, the first supporting unit and the second supporting unit are mounted on site, X, Y and Z data of a profiling block is measured in a three-coordinate mode, and the first supporting unit and the second supporting unit are adjusted to theoretical positions; and 4, pressure control valves of the first supporting unit and the second supporting unitare adjusted in combination with load variation of a side wall assembly positioning pin. According to the method for improving positioning strength of the built-in clamp, the influence of gravity ofthe side wall assembly on strength of the overturning positioning pin is eliminated through a method of adding the side wall assembly supporting units to a floor clamp, and the problem of insufficientpositioning strength of an existing built-in clamp is solved.

Description

technical field [0001] The invention belongs to the technical field of automobile body-in-white, and specifically relates to a method for improving the positioning strength of a built-in fixture. Background technique [0002] There are two types of positioning methods for main assembly of body-in-white: built-in and external fixtures. In order to meet the needs of welding accessibility, many OEMs use built-in fixtures for positioning. For the positioning requirements of the side wall assembly, it is necessary to add a flip unit to the side wall positioning pin unit of the built-in fixture. The problem caused by the flip structure is that the strength of the positioning unit decreases, and the side wall positioning pin appears Z-down after being affected by the gravity of the side wall assembly. Shen phenomenon. Contents of the invention [0003] The present invention provides a method for improving the positioning strength of the built-in fixture, which resolves the influ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/04
CPCB23K37/0443
Inventor 周川川王子欣高建昊蔡金生刘洋谷昊李长松毛柏吉
Owner CHINA FIRST AUTOMOBILE
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