Method and system for predicting milled surface topography of ball-end milling cutter
A technology of surface topography and milling processing, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve the problem of complex cutting edge track surface, difficult to accurately predict the ball head, and affect the performance of milling surface quality parts etc. to achieve the effect of optimization of tool parameters and processing parameters, low dependence on discrete dimensions, and high stability
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Embodiment 1
[0039] This embodiment provides a method for predicting surface topography in milling with a ball end milling cutter, such as figure 1 shown, including:
[0040] According to the analytical model of the cutting edge trajectory surface, the cutting edge trajectory surface is obtained;
[0041] Discrete the surface of the cutting edge trajectory, and establish a triangular mesh model of the cutting edge trajectory surface;
[0042] Establish a vertical reference line for surface topography sampling in the milling surface topography sampling area, and extract surface topography feature points in combination with a triangular mesh model;
[0043] The feature points of the surface topography are traversed to obtain the three-dimensional surface topography of the milled surface.
[0044] Specifically, this embodiment takes the surface topography prediction of 3-axis milling with a ball end mill as an example, including the following steps:
[0045] Step 1: Solve the coordinate tr...
Embodiment 2
[0087] In this embodiment, a ball-end milling cutter milling surface morphology prediction method is used to predict the morphology of the ball-end milling cutter 5-axis milling surface.
[0088] Such as Figure 8 As shown, in the process of 5-axis milling, in order to ensure a good contact relationship between the tool and the workpiece, the direction of the tool axis (spindle axis z s ) is inclined at a certain angle to the normal direction of the workpiece surface (z axis). It is assumed that the angle of rotation of the tool axis relative to the normal direction of the workpiece surface around the feed direction (x-axis) is β f (Recorded as tool side slip angle), the angle turned around the transverse feed direction is β c (recorded as tool rake angle), then in 5-axis milling, the spindle coordinate system O s -x s the y s z s The coordinate transformation matrix T between the coordinate system and the workpiece coordinate system s→w for
[0089]
[0090] Based ...
Embodiment 3
[0093] This embodiment provides a system for predicting surface topography during milling with a ball-end milling cutter, including:
[0094] The cutting edge trajectory surface generation module is configured to: obtain the cutting edge trajectory surface according to the cutting edge trajectory surface analysis model;
[0095] The triangular mesh model building module is configured as: discrete cutting edge trajectory surface, and establishes a triangular mesh model of the cutting edge trajectory surface;
[0096] The surface topography feature point extraction module is configured to: establish a surface topography sampling vertical reference line in the milling surface topography sampling area, and extract the surface topography feature points in combination with the triangular mesh model;
[0097] The three-dimensional surface topography acquisition module is configured to: traverse the surface topography feature points to obtain the three-dimensional surface topography o...
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