A marking detection tool set and a marking detection method for a traction beam assembly

By providing a scribing and inspection fixture assembly consisting of traction beams, the problem of dependence on large coordinate measuring machines and multiple transfers during the assembly process was solved, achieving efficient and safe assembly of the traction beams and center pins.

CN122210568APending Publication Date: 2026-06-16CRRC QINGDAO SIFANG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CRRC QINGDAO SIFANG CO LTD
Filing Date
2026-04-13
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In the manufacturing of rail vehicles, the assembly process of the traction beam and the center pin sleeve relies on large three-coordinate measuring machines, which results in high costs and low production efficiency, and requires multiple transfers, posing safety hazards.

Method used

A scribing and inspection fixture assembly for traction beams is provided, comprising a traction beam scribing fixture, a center pin sleeve scribing fixture, and an inspection fixture. These fixtures provide scribing and inspection references on the traction beam and center pin sleeve, enabling scribing and inspection without the need for a coordinate measuring machine.

Benefits of technology

It reduces reliance on large coordinate measuring machines, decreases the number of transfers, improves production efficiency, reduces costs, and minimizes safety hazards.

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Abstract

The application provides a scribing detection tool set and a scribing detection method for a traction beam assembly. The traction beam assembly comprises a traction beam and a center pin sleeve. The scribing detection tool set for the traction beam assembly comprises a traction beam scribing tool, a center pin sleeve scribing tool and a detection tool. The traction beam scribing tool takes a pair of traction mounting surfaces of the traction beam as a positioning reference, provides a scribing reference on an end surface of a center hole of the traction beam, and makes scribing marks on the traction beam. The center pin sleeve scribing tool takes an open slot of the center pin sleeve as a positioning reference, provides scribing references on an end surface and a side surface of the center pin sleeve, and makes scribing marks on the center pin sleeve. The detection tool takes the open slot of the center pin sleeve of the traction beam assembly as a positioning reference, and detects the relative positions of the scribing marks of the traction beam and the center pin sleeve of the traction beam assembly. Thus, the problem that a large three-coordinate device is needed and the traction beam assembly needs to be transported multiple times in the related art is solved.
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