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Grinding wheel path generation method for oblique axis grinding free-form surface

A path generation and free technology, which is applied in the field of ultra-precision machining and complex parts manufacturing, can solve the problems of calculation methods, complicated grinding wheel path planning, and no grinding path provided by the grinding wheel, etc., to meet the requirements of ensuring stability and reducing dynamic response performance , high processing efficiency

Active Publication Date: 2019-02-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the planning of the grinding wheel path becomes very complicated due to the inclination of the grinding wheel axis to the workpiece axis
So far, relevant research at home and abroad, including machine tool suppliers, has not provided relevant calculation methods for grinding wheel grinding paths. Therefore, it is necessary to develop a grinding wheel path generation method for oblique axis grinding free-form surfaces

Method used

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  • Grinding wheel path generation method for oblique axis grinding free-form surface
  • Grinding wheel path generation method for oblique axis grinding free-form surface
  • Grinding wheel path generation method for oblique axis grinding free-form surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] freeform surface

[0076]

[0077]

[0078] Among them, R x =6.2702;

[0079] R y =5.7235;

[0080] K=-0.9988;

[0081] A 4 = 1.927455E-04;

[0082] A 6 = 1.421518E-06;

[0083] A 8 = 1.407505E-07;

[0084] A 10 = -2.036962E-08;

[0085] A 12 ~A 20 =0.

[0086] For example, the free-form surface is ground with a rounded cylindrical grinding wheel with R=1.0mm and r=0.2mm, the inclination angle of the grinding wheel is β=45°, and the pitch of the equidistant helix is ​​set at 0.5mm. According to the grinding wheel path planning method in the embodiment of the present invention, the corresponding relationship between the X coordinate and the Z coordinate of the grinding wheel control point and the C-axis rotation angle θ is as follows: Figure 5 As shown, the dotted line in the figure represents the X coordinate of the tool control point, and the solid line represents the Z coordinate. It can be seen from the figure that the X coordinate and θ are in ...

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Abstract

The invention relates to a grinding wheel path generation method for oblique axis grinding free-form surface. A surface perpendicular to that Z axis of the workpiece coordinate system is establish ata distance zd above the free surface to be machined in the workpiece coordinate system. An equidistant helix is generated in the plane, and the discretized points are converted into cylindrical coordinate system forms (Rho, Theta, zd), the free surface to be machined is rotated by Theta angle around Z axis, and the minimum distance Delta along Z direction between the machined surface of the grinding wheel and the free surface to be machined after rotation at each point on the equidistant helix is obtained, and the coordinates of the control points of the grinding wheel are (Rho, 0, zd-Delta),the grinding wheel is a cylindrical grinding wheel with rounded corners, the axis of the grinding wheel is inclined by a fixed angle with the axis of the rotating shaft of the workpiece. The method preferentially generates the projection driving track of the control point of the grinding wheel, which ensures the stability of the grinding wheel feeding motion along the X direction, and reduces therequirement for the dynamic response performance of the machine tool.

Description

technical field [0001] The invention belongs to the technical field of ultra-precision machining and complex parts manufacturing, and relates to a method for generating a grinding wheel path for oblique-axis grinding of free-form surfaces. Background technique [0002] With the improvement of 3D function and imaging quality, the aperture required by the rear camera is getting larger and larger. With the trend of curved screens, the size and thickness of the front camera are getting smaller and thinner. The manufacturers using glass lenses in the mobile phone industry are getting more and more more and more. Compared with plastic, glass has significant advantages in the field of optical applications. Glass has better imaging quality, more types of materials, and a wider selection range of optical parameters such as refractive index and Abbe number than plastic. In addition, glass has a higher resistance to deformation, high temperature, surface scratch resistance, and a lowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/12
CPCG06F17/12G06F30/17Y02P90/02
Inventor 闫广鹏房丰洲
Owner TIANJIN UNIV
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