Diesel engine flywheel casing seam allowance and end surface shape and position tolerance detection method

Abstract

The invention discloses a diesel engine flywheel casing seam allowance and end surface shape and position tolerance detection method, and belongs to the technical field of tolerance detection. The method comprises the following steps of (1) establishing an initial coordinate system by using a flywheel casing positioning pin hole and a large seam allowance end surface, and determining the positionof a measurement piece; (2) performing angular correction by taking the flywheel casing positioning pin hole as a reference A, taking a central axis connecting line of the large seam allowance and thesmall seam allowance as a reference B, setting a zero point at an intersection point of the central axis connecting line and the end surface of the large seam allowance, and establishing a fine coordinate system; (3) dotting the end surface of the large seam allowance to simulate the plane and circular motion of the end surface of the large seam allowance, and detecting; and (4) recording a detection result. By adjusting the reference of a workpiece, increasing the number of measuring points, accurately simulating circular motion, and measuring the circular runout and other behavior tolerances of the workpiece accurately and effectively, the consistency of measurement results is good, a measurement error is small, the detection precision and accuracy are high, and effective detection results can be provided.

Description

technical field [0001] The invention relates to the technical field of tolerance detection, in particular to a detection method for the shape and position tolerances of the spigot and the end face of a diesel engine flywheel housing, which is suitable for the shape and position tolerances of shafts or hole parts with shorter references, such as coaxiality and circular runout. detection. Background technique [0002] The flywheel housing is an important part connecting the diesel engine with the gearbox. The seam of the flywheel housing and the gearbox are connected by bolts, which is the basic installation part to protect the connecting parts of the flywheel and the gearbox. At the same time, the flywheel housing is a thin-walled cast iron component, which is easily deformed during processing. The design of the flywheel housing requires that the spigot end face the The round runout requirement of the seam (hereinafter referred to as the large seam) is 0.05; The inner d...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is to provide a detection method for the shape and position tolerance of the spigot and the end surface of the flywheel housing of a diesel engine. By adjusting the workpiece measurement reference and increasing the measurement points to accurately simulate circular motion, the shape and position tolerances such as the circular runout of the workpiece can be measured. It can solve the detection problem of the shape and position tolerance of the end face and the seam face of the flywheel housing of the diesel engine

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