Cutting edge contact distinguishing method for flat-end milling cutter five-axis machining
The technology of a flat end mill and a discrimination method, which is applied in the field of milling processing, can solve the problems of cumbersome solution process and low calculation efficiency, and achieves the effect of high operation efficiency and simple judgment conditions.
Active Publication Date: 2017-05-10
DALIAN UNIV OF TECH
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Problems solved by technology
The tool contact area of the five-axis machining of the flat end mill is a complex spatial surface composed of three curves. The solution process is cumbersome and the calculation efficiency is low.
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Embodiment Construction
[0023] The present invention is further described below with reference to the examples, but the protection scope of the present invention is not limited to the following examples.
[0024] The conditions of this embodiment are set as follows: flat end mill for five-axis machining on inclined plane, climb milling, tool diameter 8mm, number of teeth 3, tool helix angle 30°, tool path spacing 2mm, tool normal depth of cut 1mm, inclined plane Angle 25°. The specific implementation steps are as follows:
[0025] (1) Establish a coordinate system:
[0026] The tool coordinate system O-XYZ takes the center point of the end face of the tool as the origin, and the direction along the tool axis away from the end face of the tool is the Z axis.
[0027] Define the angle between the tool axis vector and the plane normal as the slope angle ε;
[0028] (2) Determine whether the cutting edge point is involved in cutting:
[0029] as attached figure 1 shown, M is the elliptical cylinder...
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The invention discloses a cutting edge contact distinguishing basis for flat-end milling cutter five-axis machining, and belongs to the technical field of milling. According to flat-end milling cutter tapered plane five-axis machining, if it is determined that whether any one point on the cutting edge participates in cutting or not, the following two conditions need to be simultaneously met, that is the point is located outside the elliptic cylinder space formed by a previous cutter path sweep surface and the point is located below a machining surface. Whether the cutting edge point participates in cutting or not is determined through a mathematical analytical model, and the method has the advantages of being simple in distinguishing basis, high in operating efficiency and high in result precision. Based on the differential discretization theory, the method can be extended to the five-axis numerical control machining of a surface, and the method has a wide application prospect in the field of flat-end milling cutter cutting dynamics.
Description
technical field [0001] The invention belongs to the technical field of milling processing, relates to the analysis of contact conditions between a tool and a workpiece, and particularly relates to a method for judging the contact of a cutting edge for five-axis machining of a flat end mill. Background technique [0002] With the development and application of high-end CNC machine tools, especially five-axis CNC machining centers, and the continuous innovation of complex surface processing methods, in order to improve processing efficiency in actual production, it has become a development trend to use flat end mills with five-axis wide rows to process complex surfaces. . During the five-axis machining of the complex surface flat end mill, the local geometry of the workpiece, the tool feed direction, the tool axis vector, etc. usually change continuously along the curved tool path, resulting in the continuous change of the tool contact interface along the tool path during the ...
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IPC IPC(8): G06F17/50B23C3/16
CPCB23C3/16G06F30/20
Inventor 郭明龙魏兆成李世泉王敏杰
Owner DALIAN UNIV OF TECH