Numerical-control processing method of multi-space hole welding groove on large-scale spherical space curved surface

Abstract

The invention discloses a numerical-control processing method of a multi-space hole welding groove on a large-scale spherical space curved surface, comprising the following steps of: establishing a mathematical model of a workpiece; analyzing the mathematical model; compiling a space curved surface numerical-control processing procedure of a basic hole with a common parameter; compiling an after-compensation R parameter procedure of a rotary compound angle; compiling a general parameter numerical-control processing procedure of a R parameter processing space hole groove; applying simulation software of a VERICUT numerical-control machine tool to carry out verification; and executing the general procedures to process space holes and the groove. In the invention, because the R parameter form of a universal angle cutter head for compensation is calculated by the R parameter function of a control system of the numerical-control processing machine tool, and the processing of the welding groove is also compiled in a parameter form, the value assignment is performed according to the positions, the shapes and the sizes of the grooves of the space holes, the length of actually measured angle cutter head and the length of a cutter on a drawing so that the purpose that the grooves of multiple space holes are clamped once for processing is realized, and the shape precision of the space holes is ensured.

Description

technical field [0001] The invention relates to a mechanical processing technology, in particular to a numerical control processing method for welding grooves of a plurality of space holes on a large sphere space curved surface. Background technique [0002] At present, in the field of oil refining technology, there are more and more applications of large-scale spherical space curved surfaces, and there are more and more processing techniques that need to process multiple space hole welding grooves on large-scale spherical space curved surfaces. The existing processing method is to use the universal angle milling head to rotate the compound angle around two axes respectively on the CNC milling machine, and then use the R parameter to compile the compound angle compensation and parameter processing groove of the universal angle milling head acceptable to the machine tool control system. The CNC machining program realizes the CNC machining of the groove. However, when process...

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Problems solved by technology

However, when processing workpieces with welding grooves of multiple space holes on a large spherical space surface on a CNC milling machine, multiple clampings are required, and it is difficult to guarantee the position of the workpiece and the shape of the space holes after multiple clampings. ;In addition, due to the manual calculation of the compensation of the universal angle milling head and the use of UG software to write the NC machining program, the siemens nx6 CAD\CAM software must be used for modeling every time the machining program is compiled, which wastes time in writing the program; and during processing, if the tool If there is wear and tear, it must be reprogrammed according to the actual situation of the measurement. The operation is inconvenient, error-prone, and will also affect the processing progress of the workpiece.

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