Speed change control method for cam non-circular grinding based on constant contact arc length

A technology of contact arc length and control method, which is applied in the direction of abrasive belt grinder, etc.

Inactive Publication Date: 2008-12-17
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the non-circular grinding of the cam is controlled by the principle of constant linear speed, the influence of the characteristics of various cam profiles on the change of the grinding amount is not taken into account, so the grinding amount of the cam is not an ideal constant grinding amount

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  • Speed change control method for cam non-circular grinding based on constant contact arc length
  • Speed change control method for cam non-circular grinding based on constant contact arc length
  • Speed change control method for cam non-circular grinding based on constant contact arc length

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Embodiment Construction

[0036] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0037] see figure 1 , label 1 among the figure is a cam, 2 is a tappet roller, and 3 is a grinding wheel. In this embodiment, the cam non-circular grinding technology is used to process a large concave-convex wheel. The specific implementation steps of the cam non-circular grinding based on the variable speed control method of constant contact arc length are as follows:

[0038] (1) Initialization parameters r, r g 、r S , θ, H, H(θ), ρ, V S 、a p , L

[0039] r is the base circle radius, r g is the roller radius, r S is the radius of the grinding wheel, θ is the center rotation angle of the roller, H is the lift value, H(θ) is the lift function, ρ is the radius of curvature, V S is the linear speed of the grinding wheel, a p is the grinding feed rate, and L is the contact arc length.

[0040] (2) Calculate the position X of the center of...

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Abstract

The invention relates to a variable speed control method based on invariable contact arc length in cam non-circle grinding. The method provides a non-circle grinding control method which controls variable speed rotation of a work piece according to the principle of invariable contact arc length in regard to the problem how to ensure variable grinding amount in the cam non-circle grinding. The method better overcomes the problem of constantly changing of grinding arc length and the grinding amount at the position of each grinding point caused by obvious change of the curvature radius of the cam profile. Compared with the existing method of controlling constant angle speed and constant line speed, the method is more beneficial to avoiding impact and vibration caused by violent change of grinding force, thus obtaining higher processing precision and better surface quality of the work piece.

Description

Technical field [0001] The invention belongs to a non-circular grinding speed-changing control method for controlling the rotating speed of the cam according to the change rule of the dynamic contact arc length in the non-circular cam grinding to realize grinding with constant grinding amount. Background technique [0002] The so-called non-circular grinding generally refers to the grinding process in which the trajectory of the grinding point is a non-circular curve in the CNC grinding process. Non-circular grinding can be divided into trajectory grinding (multi-axis and multi-dimensional linkage, similar to CNC milling process) and C-X synchronous grinding technology. The non-circular grinding refers to C-X synchronous grinding technology, which is a tracking grinding technology newly developed by developed countries in recent years. It uses the headstock of the grinding machine, that is, the C axis to drive the workpiece to rotate, and the movement of the grinding wheel f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B19/12
Inventor 何永义李静沈南燕陈荣莲刘博吴钢华
Owner SHANGHAI UNIV
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