Method for processing 8 shaped oil groove with numerical control boring mill

Abstract

The invention belongs to the numerical control machining technical field and relates to a method for machining a 8-shaped oil sink by a numerical control machine. The method comprises the following steps: the 8-shaped oil sink is divided into four symmetrical sections by a coordinate system XOY with a centre O of the 8-shaped oil sink as a punch mark and the four symmetrical sections are respectively machined by a numerical control boring machine, each symmetrical sections is machined into a one eighth circular arc A, a tangential path B, and a one fourth circular arc C and a tangential path D in turn from a vertex to the centre O of the 8-shaped oil sink by a milling cutter of the numerical control boring machine. The 8-shaped oil sink machined and obtained by the method for machining the 8-shaped oil sink by the numerical control machine has attractive appearance and quality, flat underside, consistent depth and smooth transition of the circular arc, greatly improves machining efficiency, ensures machining quality and is not easy to cause accidental situations of damaging a lead layer in the machining process.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining, and relates to a method for machining an 8-shaped oil groove on the inner surface of a bearing bush by using a numerical control boring machine. Background technique [0002] Steam generator 5.263.807 The 8-shaped oil groove of the bearing bush is opened on the surface of the inner round lead layer of the bearing bush, located around the high-pressure top oil hole, the groove is 8 mm wide and 1.5 mm deep, and is evenly distributed in a 8-shaped 400.8 mm on the inner circle. The existing processing method of the 8-shaped oil tank is to first draw a 8-shaped template, then draw a line on the inner circle of the bearing bush according to the shape of the template, and finally repair it manually. The existing method of manually processing the 8-shaped oil tank has the following disadvantages: [0003] 1. The bottom plane of the processed oil tank is uneven, and the arc transiti...

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Problems solved by technology

[0003] 1. The bottom plane of the processed oil tank is uneven, and the arc transition is obviously pitted, and it is difficult to ensure the smoothness of the arc transition area;

[0004] 2. The processing efficiency is low. It takes about 5-6 hours to manually repair an oil tank, and a master with excellent clamping skills is required to complete it;

[0005] 3. Accidents are prone to occur during the repair process. If the lead layer is damaged, it will take a lot of time to repair it

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