Method for machining cylinder holes in diesel engine body

Abstract

The invention discloses a method for machining cylinder holes in a diesel engine body. The method comprises steps as follows: machining elements of the cylinder holes in the engine body are classified, analyzed one by one and allocated to rough machining combined boring tools and finish machining combined boring tools; machining elements required to be machined are machined through the rough machining combined boring tools and the finish machining combined boring tools respectively; during machining, resistance to cutting is balanced, and vibration of the tools is reduced. With the adoption of the method, the tool changing frequency and the number of the tools can be reduced, so that the tool changing time is saved, the cost decreasing and benefit increasing purposes are achieved, and the yield of the diesel engine body is increased.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing and relates to a method for processing a cylinder hole of a diesel engine body. [0002] Background technique [0003] At present, in the production process of the diesel engine body, the cylinder bore is the key element in the processing of the body (or body) and must be controlled emphatically. [0004] There are many processing elements for a single cylinder hole, the number of tools is large, and the number of tool changes is large during processing. The number of cylinder holes in a single machine body is at least 5 (generally 5-9 for in-line machines, and 12-20 for V-type machines), resulting in The machining cycle of the cylinder bore of the fuselage is long. [0005] At present, there is following shortcoming in existing processing method: [0006] 1. There are many processing elements for the cylinder bore of the fuselage and the oil pump cavity. Taking the cylinder bore as an e...

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Problems solved by technology

[0007] 2. Analysis of conventional processing methods. Conventional processing technology is divided into: rough boring-semi-fine boring-fine boring, and the number of tools prepared is also large. For a processing element, at least 2 tools are required, and the machine tool needs to change tools at least 2 times. In order to complete the processing of one size, according to the calculation of at least 6 processing elements in the cylinder hole, the tool should be changed at least 12 times; frequent tool changes will increase the auxiliary time of the machine tool and increase the processing cost, which is uneconomical; if the length of the tool exceeds the machine tool itself The allowable length of the library can only be changed manually, which sometimes increases unnecessary alignment time

The extension of the auxiliary time and the increase in the number of tools undoubtedly cannot meet the purpose of reducing the processing cost and increasing the output, and the necessary manual tool change has buried safety hazards for quality accidents, and is not conducive to the guarantee of the tolerance of the cylinder bore of the fuselage. , become the bottleneck of the development of the industry

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