Self-adaptive compensation method for detecting turning error of large part of rotary body

Abstract

The invention discloses a self-adaptive compensation method for detecting the turning error of a large part of a rotary body, comprising the steps of: rough machining the part of the rotary body; measuring the radius of intersection of two adjacent contour line segments on an axial section of an inner hole of the part of the rotary body and en extent of error delta 1 of the radius of the two end points by a probe, performing semifinishing for the rough machined part of the rotary body, performing semifinishing for the semifinishing lathe tool by machining trajectory intersection and two end points with theoretical machining radius which is X1-delta 1 / 2, measuring the actual radiuses of the intersection (A) and two end points (A1) in the step 2) after semifinishing to obtain an extent of error delta1' of semifinishing; performing finish machining, wherein that finish machining lathe tool, the main shaft rotary speed of the tool and the feeding speed are identical to those of semifinishing. In the process of finish machining, a numerical control system of the lathe compensates the extent of error delta 1' of semifinishing. The invention solves the problem that in the machining process the machining error caused by tool wear exists, thereby greatly improving the machining precision of the large part of the rotary body.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for detecting and adaptively compensating for turning machining errors of large revolving body parts. technical background [0002] When large-scale rotary parts are processed on a lathe, the cutting length of the tool is one circle under the feed of each revolution of the part. After the cross-sectional profile of the part is processed, the cutting length of the part is πDL / s (D is the turning diameter, L is the length of the cutting section, s is the feed per revolution), it can be seen from the formula that the larger the diameter of the part, the longer the required cutting length, on the other hand, it can be seen from the processing experience of the factory that the problem of cutting tool wear It is especially prominent in the processing of large parts. Taking a large-scale rotary part manufactured by the factory as an example, the diameter of a par...

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Problems solved by technology

[0002] When large-scale rotary parts are processed on a lathe, the cutting length of the tool is one circle under the feed of each revolution of the part. After the cross-sectional profile of the part is processed, the cutting length of the part is πDL / s (D is the turning diameter, L is the length of the cutting section, s is the feed per revolution), it can be seen from the formula that the larger the diameter of the part, the longer the required cutting length, on the other hand, it can be seen from the processing experience of the factory that the problem of cutting tool wear It is especially prominent in the processing of large parts. Taking a large-scale rotary part manufactured by the factory as an example, the diameter of a part with a diameter of 450mm and a length of 2000mm is processed. The diameter difference between the starting point and the end point is more than 0.5mm. During the processing of large rotary parts, the tool will gradually wear out as the cutting length increases. This problem cannot be solved by manual inspection and adjustment of tool parameters, which often affects product quality and production progress.

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