Chamfering edge line parameterization design method for cylindrical flat-end end mill with chamfer
A technology of parametric design and end milling cutter, which is applied in calculation, electrical digital data processing, special data processing application, etc. It can solve problems such as changes and inability to guarantee the lead requirements of chamfering parts, and achieve strong adaptability
Active Publication Date: 2019-12-03
SOUTHWEST JIAOTONG UNIV +1
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Problems solved by technology
The chamfering structure of the end mill designed in this way cannot change with the change of the straight edge of the end tooth, and cannot guarantee the lead requirement of the chamfering part
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[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. figure 1 It is a structural schematic diagram of a chamfering end mill, and the present invention is only designed for the edge line of the chamfering edge. Its realized technical scheme is as follows:
[0047] 1. Definition of geometric parameters of chamfering edge line
[0048] (1) The straight edge of the end mill has an off-center structure, and the distance from the center of the straight edge is defined as r h , that is, the amount of tooth eccentricity;
[0049] (2) The axial distance from the starting point to the end point of the end mill chamfering edge line is h, that is, the chamfering width;
[0050] (3) The taper angle of the rotary cone of the chamfering part is k, which is the chamfering angle.
[0051] 2. Formation principle of chamfering edge line
[0052] (1) Construct the coordinate system and auxiliary surface...
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The invention discloses a chamfering edge line parameterization design method for a cylindrical flat-end end mill with a chamfer, which comprises the following steps of: firstly, defining geometricalparameters of a chamfering edge line, then constructing a coordinate system, an auxiliary surface and an auxiliary line, then defining an end point of the chamfering edge line and auxiliary parametersof the chamfering edge line, and finally solving parameter coordinates of any point on the chamfering edge line and a parameter model of the edge line. Points on the blade with the tooth offset center quantity are guaranteed through the tangent line of the cylindrical surface, the circular conical surface guarantees the rotation shape of the end teeth, and the guide spiral line guarantees that the peripheral teeth and the end teeth are consistent in lead. The edge line of the chamfering edge is obtained through common constraint of multiple conditions, a parameter model of the edge line is obtained by establishing internal correlation between the edge lines, the formed chamfering edge line can be changed in a self-adaptive mode according to changes of end teeth and peripheral teeth of theend mill, and high adaptability is achieved.
Description
technical field [0001] The invention relates to the technical field of manufacturing integral end mills, in particular to a parametric design method for chamfering edge lines of cylindrical flat end mills with chamfers. Background technique [0002] The integral end mill is an important tool for milling. Its structure is divided into different types according to the end tooth rotation profile: flat bottom end mill without chamfer, flat bottom end mill with chamfer (hereinafter referred to as chamfer end mill), round Arc nose end mills and ball nose end mills. Chamfered end mills are mainly used for cavity processing with chamfered shape requirements or low requirements on edges. The chamfered structure can also improve the cutting force of the tool and increase the tool life. [0003] Integral carbide end mills have a complex structure, high hardness of the base material, and high grinding precision requirements. Usually, five-axis linkage CNC tool grinders and standard gri...
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IPC IPC(8): G06F17/50
Inventor 江磊丁国富陈思远罗斌丁国华马术文梁红琴
Owner SOUTHWEST JIAOTONG UNIV