Hole grinding method of deep hole drilling and boring machine

Abstract

The invention relates to a hole grinding method of a deep hole drilling and boring machine. A first abrasive cloth strip the same as a boring head wood key groove in size is arranged on the bottom layer of the wood key groove, a second abrasive cloth strip with the length two times that of the first abrasive cloth strip is placed on the wood key groove, then a wood key is placed to be subject to beating for compression and compaction, and three wood key grooves in the other positions are operated according to the steps. A machine tool is started, the wood keys pass through a hole opening of a shaft system, and the hole opening of the shaft system grinds the wood keys until the outer diameter of the wood keys is equal to the diameter of an inner hole; the wood keys are taken down to be saw into high wood keys and low wood keys; the high wood keys are long; the high wood keys are wrapped with second abrasive cloth; the high wood keys and the low wood keys are placed into the wood key grooves, and installation of the other wood key grooves is completed; and a machine tool main shaft is started, workpieces rotate, cutting fluid is supplied, and the high wood keys and the low wood keys swell. The machine tool is started for feeding, and the second abrasive cloth wrapping the high wood keys grinds the wall face. Through the adoption of the hole grinding method, the contact area between the abrasive cloth strips and the inner surfaces of the workpieces is large, the ground faces are free of surface vibration lines, cost is low, the grinding production efficiency is high, operation is easy and convenient, the inner hole surface quality is good, and the grinding surface roughness can reach Ra1.6-Ra3.2.

Description

technical field [0001] The invention relates to a high-efficiency grinding method for improving surface roughness in shaft system deep hole processing, in particular to a high-efficiency hole grinding method for a deep hole drilling and boring machine. Background technique [0002] Marine shafting is an important moving part of a ship's power transmission. The propeller shaft and the intermediate shaft are hollow shafts, and an independent push-pull device is installed in the inner hole of the shaft. Therefore, the dimensional tolerance and surface roughness requirements of the inner hole of the shafting are relatively high. [0003] The marine shafts processed by the applicant mainly include propeller shafts and intermediate shafts, both of which are more than 5 meters in length, with a maximum length of 18 meters and an average length of more than 10 meters. After the fine boring of the inner hole is completed, there will usually be local unqualified surface roughness, w...

AI Technical Summary

Problems solved by technology

The reasons for this phenomenon mainly include the following three aspects: First, the shaft system is high-temperature alloy steel that has been quenched and tempered. The material has high strength, hardness, and toughness, and the cutting edge is easy to wear; The wear resistance of the boring tool is average, and the surface quality decreases due to the wear of the cutting edge during the processing; the third is that the processing quality cannot be observed online during the deep hole processing, and the unqualified surface quality can only be found after the tool is stopped. efficiency suffers

At present, under the existing production conditions, rework can only be done from scratch, and partial rework cannot be realized, which seriously affects production efficiency

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