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

A technology of guide vanes and ball-end milling cutters, applied in instruments, digital control, control/regulation systems, etc., can solve problems such as the influence of the accuracy of the boundary equation in the contact area, and achieve the effect of improving computational efficiency

Active Publication Date: 2017-03-15
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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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 th

Method used

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

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Embodiment Construction

[0058] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0059] The specific implementation manner is mainly divided into the following steps, and each step is described in detail below.

[0060] 1. Get the 3D model of the guide vane, plan the tool path, and set the CNC machining parameters. The specific content is as follows:

[0061] The cascade theory is used to design the three-dimensional guide vane. The expressions of the suction surface 1 and the pressure surface 2 of the guide vane are high-order polynomials. The leading edge 3 and the trailing edge 4 are circular arcs. The section of the guide vane adopts cascade parametric modeling. The sections of the guide vanes are stacked in a straight line to form the airfoil. The cross section of the guide vane is figure 1 As shown, the guide vane as figure 2 shown.

[0062] Import the guide vane into the commercial ...

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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 ...

Claims

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 李宏坤代月帮
Owner DALIAN UNIV OF TECH
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