High-precision plane surface processing method for large planar part

A technology of plane processing and large plane, applied in the field of high-precision plane processing, can solve the problems of instable machining accuracy, heavy scraping workload of fitters, low milling machining accuracy, etc., and achieves reduced labor intensity, stable and reliable machining quality, low cost effect

Inactive Publication Date: 2010-06-30
WUHAN MARINE MACHINERY PLANT
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Problems solved by technology

[0003] The purpose of the present invention is mainly to solve the defects and deficiencies such as low milling precision, heavy scraping workload of the fitter, long processing cycle and unstable processing accuracy in the absence of large-scale grinding processing equipment, and to provide a grinding machine with high processing accuracy. , the fitter has a small scraping amount and a short processing time, a high-precision surface processing method for large flat parts that use milling instead of grinding

Method used

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Embodiment

[0016] Taking the processing of the upper and lower shells of the thrust bearing of the main propulsion shafting of a certain ship as an example, the processing method of the present invention is further described.

[0017] The upper and lower shells are the main load-bearing parts of the thrust bearing. Their length×width×height dimensions are all 1900×1700×600 mm, and the precision requirements for their planes are flatness ≤ 0.05, roughness ≤ Ra1.6, When the upper and lower shells are in plane contact, the bonding area is ≥70%. The processing quality ≥ 70% of the bonding plane on the upper and lower shells will affect the force and sealing performance of the thrust bearing. If the machining accuracy of the upper and lower shell planes cannot meet the requirements, the thrust will be damaged. The normal operation of the bearings brings unstable factors, and also causes oil leakage on the joint plane of the upper and lower shells, which affects the safety of the ship. Theref...

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Abstract

The invention relates to a high-precision plane processing method of a large-plane part, relating to the processing of mechanical parts. The invention sequentially comprises the following steps: A. the roughcast of the large-plane part is arranged on a gantry planer or a milling planer for coarse processing; B. the large-plane part which is coarsely processed is arranged on the milling planer, the plane of which is half-precisely milled; C. a mainshaft of the milling planer is provided with a speed-increasing milling head which is provided with a plane grinding wheel which is used for millingthe plane of the part to the limit dimension; D. the surface of the part is scraped by a fitter till the precision requirement is achieved. The invention has the advantages of low processing cost, low labor intensity of workers, high processing precision, short construction period, high production efficiency, low precision requirement of the equipment, simple, smart and convenient processing method, good process adaptability, and being widely popularized and applied to in the high-precision plane processing of various large planes or ultra-large plane workpieces.

Description

technical field [0001] The invention relates to a processing method of mechanical parts, in particular to a high-precision plane processing method of large plane parts. Background technique [0002] The high-precision machining of the plane of existing mechanical parts, such as the machining of the upper and lower shell planes of the thrust bearing in the main propulsion shaft of the ship, the machining quality will directly affect the machining accuracy of the inner gear thrust surface of the upper and lower shells. As a result, it affects the stress condition of the thrust bearing, brings unstable factors to the normal operation of the thrust bearing, and affects the safety of the ship; and if the processing quality of the fitting plane of the upper and lower shells does not meet the requirements, it will also cause leakage of the fitting plane. Oil. At present, the processing of the upper and lower shell planes is generally completed by a surface grinder. However, surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B7/10B23P15/00
Inventor 黄西玲严国辉韩兵强阎崇达陈英
Owner WUHAN MARINE MACHINERY PLANT
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