Automatic leveling device and method for three-coordinate measurement of finished vehicle

Abstract

The invention relates to an automatic leveling support for analyzing and measuring the three coordinates of a defective automobile off the production line of the vehicle general assembly in an automobile company. A coordinate system is established before the analysis and measurement of the defective automobile, and the establishment of the coordinate system needs to level the automobile body first, which means, an Z-direction automatic leveling function of the automobile body is completed by the device and method provided by the invention. The device comprises four tyre supports, four height gauges four lifting-up devices, two gap bridges, a control cabinet, a control computer and eight cables. The method comprises the steps: the automobile is put on the four tyre supports, Z-direction heights of the four corners on the automobile body are real-time measured through four height gauges and are fed back to the control cabinets, the control cabinets convert the height difference between the measured value and the target value into the pulse output to the tyre supports, so that the Z-direction height of the automobile body is adjusted. The adjusting process is a closed loop cyclic adjustment, and the final adjusting precision is plus or minus 0.05mm.

Description

technical field [0001] The invention relates to an automatic leveling brace used by a vehicle factory before carrying out three-coordinate analysis and measurement on a vehicle with a problem in assembly line, which can automatically level the vehicle in the Z direction, simulate the state of the vehicle on the production line, and then perform three-coordinate analysis and measurement. Locate the root cause of the problem. Background technique [0002] If there is a size-related quality problem on the finished vehicle, it is necessary to use a three-coordinate measuring machine to analyze and measure the size of the problem-related parts, locate the root cause of the problem, and guide production to optimize quality. The chassis, body state and production state are inconsistent, and the suspension will cause a certain degree of deformation to the body. Therefore, when the three-coordinate measuring machine measures the body size, it is necessary to lift and level the body ...

AI Technical Summary

Problems solved by technology

Because the car body is a rigid body, if one jacking device changes, the other three values ​​will change. Therefore, it takes a long time to manually adjust to within the tolerance of ±0.05mm, and the tacit understanding of the four operators is tested at the same time, and the efficiency is very low.

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