Numerical control machining method for multi-type large-diameter space pipe connecting holes in ultra-large type end socket

Abstract

The invention discloses a numerical control machining method for multi-type large-diameter space pipe connecting holes in an ultra-large type end socket, and belongs to the field of numerical control machining. The method comprises the steps that the machining process zero point of the end socket is determined according to the outer circle of the irregular end socket; according to the determined process zero point of the end socket, the datum points of the connecting pipe hole on the end socket and the fixed datum block are calibrated, and the contour line of the connecting pipe hole is visually marked; a universal angle milling head is used, a process zero point is set on the datum point of the seal head according to the datum point of each connecting pipe hole, and rough tapping machining of the connecting pipe holes is conducted along the curved surfaces of the connecting pipe holes in a plunge milling cutting mode; comparing the benchmark on the end socket with the benchmark on the fixed position benchmark block to determine the deformation in the machining process of the end socket, recalibrating the position of the connecting pipe hole, and performing finish machining on the connecting pipe hole with enough machining allowance according to the recalibrated position of the connecting pipe hole. The method is suitable for machining various large-diameter holes in workpieces which have the advantages of being oversized, thin in wall, prone to deformation, made of stainless steel materials and the like.

Description

Technical field [0001] The present invention belongs to the field of CNC machining, and involves a digital control method for multi-large-scale space receiving holes on a super-large closed space. Background technique [0002] The ultra-large thin-walled head of the present invention has a diameter of 15,000 mm or more, and the wall thickness is 100 mm or less, and its diameter wall thickness is 150: 1 or more, which is super large, thin-walled workpiece, and there are many large receiving holes on the head. And in the inverted tubing, the maximum tubing hole has a length diameter of 4000 mm. A limited to the limit of the existing gantry milling machine gantry width design, the super-large head processing needs one divided into two, processing, and then welded to the overall head, which is more in the position of each tube hole. Strict; in addition, the separated head stability is poor than the integral head, and the opening hole of the large tube hole is very easy to deform the ...

AI Technical Summary

Problems solved by technology

This super-large head is the first head of a new type of nuclear power main vessel in the world. There is no successful processing experience at home and abroad to learn from. There is no public numerical control machining method for multi-type large-diameter space connection holes on super-large heads. technology disclosure

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