Semi-analysis modeling method of contact area between ball-end milling cutter and guide vane

Abstract

The invention belongs to the five-axis numerical control machine tool machining field, and provides a semi-analysis modeling method of a contact area between a ball-end milling cutter and a guide vane. The semi-analysis modeling method of a contact area between a ball-end milling cutter and a guide vane includes the following steps: performing cutter path programming, and setting numerical control machining parameters; establishing a workpiece coordinate system, and acquiring the parameter equations of the design surface and the machining surface of the vane, and the movement track equation of the ball center of the milling cutter; determining the cutter contact point and the cutter location point during the machining process, taking the cutter contact point and the cutter location point as the origin to respectively establish a three dimensional rectangular coordinate system; converting solving problems of No.1-No.4 boundary curves of the contact area into projection equation solving problems of the curves in an XL-YL two dimensional coordinate system, and respectively solving the projection equations of the No.1-No.4 boundary curves; and obtaining the intersection points of the No.1-No.4 boundary curves, by mutually making a simultaneous system of equations, and obtaining the projection of the contact area. The semi-analysis modeling method of a contact area between a ball-end milling cutter and a guide vane can solve the problem of performing analysis modeling of the contact area during the process of processing a straight-vane-body vane molded in a vane grid by means of a ball-end milling cutter on a five-axis numerical control machine tool.

Description

technical field [0001] The invention belongs to the field of five-axis numerical control machine tool processing, and relates to a cutting force simulation method in the process of complex curved surface finishing, especially semi-analytical modeling of the contact area during the finishing process of a ball end milling cutter and a guide vane of a five-axis numerical control machine tool method. Background technique [0002] The guide vane is the key component in the aero-engine turbine to realize the conversion of the airflow function and change the direction of the airflow. There are multi-order continuous derivatives at the points, and there are no singular points and redundant inflection points. It is a fast and accurate modeling method for turbine blade sections recognized by the industry. [0003] It has always been the goal of the manufacturing industry to efficiently process the designed high-performance curved surface with high quality and quantity. However, due ...

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Problems solved by technology

[0006] At present, there is no semi-analytical modeling method for the contact area between the ball nose milling cutter and the workpiece on the five-axis machine tool at home and abroad. Some scholars are studying the modeling method on the three-axis CNC machine tool, but they are in the modeling process. Part of the boundary has been simplified, and the accuracy of obtaining the boundary equation of the contact area is affected

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