Numerical Control Machining Method of Gran Hole on Cylinder Block of Diesel Engine

Abstract

The invention discloses a numerical control machining method for a gland hole in a diesel engine cylinder body. The numerical control machining method includes the following steps that firstly, a flatspinning plate is installed on a machine tool square ram, the central axis of the flat spinning plate is concentric with the central axis of the gland hole, and the clearance between the end face ofa tool nose and the end face of the gland hole is a; secondly, a tool is rotated in the clockwise direction; thirdly, a sliding plate is moved so that the tool nose can be positioned to the starting point of an extension line of an outer chamfer; fourthly, due to feeding of the machine tool square ram and the sliding plate, cutting of the outer chamfer, an outer straight hole, an outer conical hole, a middle straight hole, an inner conical hole, an inner straight hole and an inner chamfer is completed; and fifthly, tool retracting is conducted. By means of the numerical control machining method, the tool input cost is reduced, the tool changing time and the tool setting assisting time are omitted, the labor intensity of workers is lowered, safety is good, the requirement for operators is low, in addition, rigidity of the tool is good, the feeding amount is large, the machining efficiency is high, the machining efficiency can be increased by three times or higher, meanwhile, tool cutting is stable and reliable, the machining size can be accurately controlled, and the product surface machining quality is improved.

Description

technical field [0001] The invention relates to a numerical control machining method for a cylinder block of a marine diesel low-speed engine, in particular to a numerical control machining method for a gran hole on a cylinder block of a marine diesel low-speed engine, and belongs to the technical field of numerical control machining. Background technique [0002] Cylinder block is one of the important parts of low-speed diesel engine and an important part of diesel engine. Its quality directly affects the performance and service life of the diesel engine. According to the functional design requirements of the diesel engine, the gran hole 1 of the cylinder block is a multi-step hole, such as figure 1 As shown, it consists of an outer chamfer 10, an outer straight hole 11, an outer tapered hole 12, a middle straight hole 13, an inner tapered hole 14, an inner straight hole 15 and an inner chamfer 16. The middle hole diameter is large, and the large and small holes transition...

AI Technical Summary

Problems solved by technology

The above method needs to use four knives for processing, and the processing steps need to be completed in six steps. Not only the tool input cost is high, the tool change time is long, the labor intensity is high, the operation is cumbersome, the work efficiency is low, and the tool rigidity is poor, which requires the level of the operator. High, the size cannot be precisely controlled, and the processing quality is difficult to guarantee

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