An online measurement device for the repeatability of assembly fixtures

CN224317027UActive Publication Date: 2026-06-02MH ROBOT & AUTOMATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
MH ROBOT & AUTOMATION
Filing Date
2025-08-14
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In the existing technology, the positioning accuracy of the body-in-white assembly fixture is easily affected by mechanical wear and temperature changes after long-term operation, resulting in a large deviation in positioning accuracy and affecting the accuracy of the body.

Method used

An online measurement device for the repeatability of assembly fixtures was designed. Multiple displacement sensors on the gantry crane are used to detect the four corner points of the assembly fixture. The device is connected to the production line PLC controller through a data acquisition component to achieve online accuracy monitoring and alarm, thus avoiding production stoppages for measurement.

Benefits of technology

It achieves efficient online precision monitoring without interrupting production, reduces cost investment, ensures the overall assembly precision of the body-in-white, and promptly alarms and handles positioning accuracy deviations.

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Abstract

This utility model belongs to the field of automotive manufacturing technology and discloses an online measurement device for the repeatability and positioning accuracy of a assembly fixture. It includes a gantry frame, on which two sets of single-sided measuring mechanisms for detecting the position of the assembly fixture are installed. Both sets of single-sided measuring mechanisms are connected to the production line PLC controller via data acquisition components. Each single-sided measuring mechanism includes a first detection component, a second detection component, a third detection component, and a fourth detection component for detecting the four corner points of the assembly fixture. All four detection components are fixedly mounted on the gantry frame via fixed brackets. Each of the first, second, third, and fourth detection components is correspondingly equipped with a fastening fixture for securing the assembly fixture. This utility model achieves efficient online accuracy monitoring without production interruption and at low cost, and can be shared with the production line PLC controller, which helps reduce cost investment.
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