Method for finish machining of inner hole of ultra-long copper bush on deep hole drilling and boring machine

Abstract

The invention relates to the technical field of copper bush inner hole machining, in particular to a method for finish machining of an ultra-long copper bush inner hole on a deep hole drilling and boring machine. The method comprises the steps that firstly, the two ends of a copper sleeve are assembled with copper sleeve deep hole tools, the copper sleeve deep hole tools are clamped through a deep hole machine tool clamping jaw, and clamping of the copper sleeve on a deep hole drilling and boring machine is achieved; 2, a boring head is installed, and a wood key is assembled in a boring head key groove; 3, the closed center frame is assembled, and an upper roller of the closed center frame is in non-extrusion contact with the outer circle of the copper sleeve; 4, rough boring or semi-fine boring is carried out; 5, fine boring is conducted, specifically, fine boring is conducted on the inner hole of the copper bush from one end to the range of the dimensional tolerance, then turning around is conducted, the steps 1-3 are repeated, and boring is conducted from the other end to the range of the dimensional tolerance; and 6, abrasive paper is used for polishing. The device can effectively eliminate a horn mouth phenomenon when an ultra-long copper bush inner hole is machined, and guarantees the machining precision of the copper bush inner hole.

Description

technical field [0001] The invention relates to the technical field of machining inner holes of copper sleeves, in particular to a method for finishing ultra-long inner holes of copper sleeves on a deep hole drilling and boring machine. Background technique [0002] Copper sleeves are widely used in the shipbuilding field because of their good corrosion resistance, wear resistance and compression resistance. Copper materials have poor rigidity, high coefficient of thermal expansion, and thermal expansion and cold contraction have a great influence on the size, resulting in poor processability of copper materials. Processing needs to solve problems such as clamping deformation, difficult size control, serious vibration marks, and difficulty in ensuring shape and position tolerances. In order to meet the high-precision processing requirements of the inner hole of the copper bushing, in the processing type of the copper bushing, the shorter copper bushing is generally processe...

AI Technical Summary

Problems solved by technology

If the length of the copper sleeve exceeds 3500mm, it is difficult to meet the high precision requirements in one clamping during deep hole machining

[0004] Take the copper bushing for a ship-type propeller shaft as an example. The total length of the copper bushing is 4500mm, the hole diameter is φ545+0.07, the hole wall thickness is 33mm, and the cylindricity of the hole is ≤0.05mm. The requirements are high, and the deep hole finishing is difficult.

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