Method for grinding crankshaft of diesel engine accurately

Abstract

A technology for precisely grinding the crankshaft of diesel engine features that the mainshaft supporting frame can cancel out the gravitation of crankshaft and the push force of abrasive disc to prevent radial deformation and the crank supporter can prevent the axial deformation caused by two centers.

Description

technical field [0001] The invention relates to a processing method for a crankshaft of a diesel engine. Background technique [0002] Although the machining process of most diesel engine crankshafts has been continuously improved, traditional process equipment and methods have been used, and numerical control equipment is rarely used, and it has always hovered at the process level of ordinary general-purpose equipment and special machines. The traditional process design uses a large number of general or special measuring tools based on the equipment status, and relies on the frequent measurement and trial cutting method of the process operator to ensure the technological requirements of the axial dimension of the crankshaft. The efficiency is low, and the axial dimension of the crankshaft is out of tolerance due to human factors. The impact is serious. [0003] Diesel engine crankshafts are slender shafts, which are typical flexible parts. Due to the existence of crankshaf...

AI Technical Summary

Problems solved by technology

The traditional process design uses a large number of general or special measuring tools based on the equipment status, and relies on the frequent measurement and trial cutting method of the process operator to ensure the technological requirements of the axial dimension of the crankshaft. The efficiency is low, and the axial dimension of the crankshaft is out of tolerance due to human factors. seriously affected

[0003] Diesel engine crankshafts are slender shafts, which are typical flexible parts. Due to the existence of crankshafts, the structural manufacturability is poor. The main performances are as follows: 1. When grinding the main shaft, the axial dimension 2. During the grinding process, the thrust of the grinding wheel on the crankshaft and the gravity of the crankshaft itself cause the radial dimension of the crankshaft to change

The occurrence of the above problems seriously affects the machining accuracy of the crankshaft during the machining process, easily causes the axial and radial offset of the crankshaft, causes abnormal wear of the bearing bush and the journal, and also affects the normal movement of the piston connecting rod, resulting in abnormal gas flow of the diesel engine or even Exceeding the standard, and even affecting the overall performance of the diesel engine

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