A special fixture for hard turning of shaft parts

The double-pin system, which uses center holes at both ends for positioning and a floating chuck for cooperation, solves the problem of insufficient clamping precision of hard three-jaw chucks, realizes high-precision machining of shaft parts, and meets the quality requirements of new energy vehicles.

CN224346978UActive Publication Date: 2026-06-12CHANGZHOU FULIN PRECISION TRANSMISSION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGZHOU FULIN PRECISION TRANSMISSION CO LTD
Filing Date
2025-06-06
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing rigid three-jaw chuck clamping technology has insufficient clamping precision in the processing of automotive parts, resulting in excessive processing errors and failing to meet the stringent quality requirements of new energy vehicles.

Method used

Employing a floating chuck and a double-ejector positioning system, the system uses center holes at both ends for positioning. Combined with the adaptive following function of the floating chuck, it achieves high-precision clamping of shaft-type parts. The first and second ejector pins respectively abut against the two end faces of the part, and the floating chuck follows the movement of the part, ensuring stability and accuracy during the machining process.

Benefits of technology

It effectively controls circular runout and coaxiality error within 0.01mm, improves machining accuracy, reduces scrap and rework rates, and increases production efficiency. It is suitable for machining shaft parts of various specifications and types.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of special fixture of automobile parts, specifically discloses a special fixture for hard turning of shaft parts for machine -added equipment, and the machine -added equipment has the floating chuck connected with it to make floating chuck can follow the part movement in the processing process, the special fixture for hard turning includes first needle and second needle, first needle and second needle are located at both ends of the part respectively to respectively resist the end face of the part, wherein, first needle is arranged in the clamping jaw of floating chuck, thereby, the technical problem that the insufficient clamping precision and the machining quality difficult to guarantee existing in the current automobile parts machining process are solved.
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