Grinding device and method for determining thickness of grinded material

Abstract

PROBLEM TO BE SOLVED: To provide technique for determining a thickness by which the thickness of a workpiece highly accurately managed without requiring highly skilled work. SOLUTION: The grinding device 100 for grinding the workpiece has a first grinding member 111, a second grinding member 121 arranged oppositely to the first grinding member via the workpiece 101, and a driving means which relatively rotates or oscillates the first grinding member and the second grinding member. The device 100 also has: detecting means 114, 117, which measure the position of a device structure part changed with the changes of the thickness of the workpiece and detects whether the detected value of the thickness corresponding to the thickness below a setting value of the thickness of the workpiece is obtained; and a clocking means which calculates the duration of continuously obtaining the detected value of the thickness corresponding to the thickness below the setting value. The device 100 is composed so that grinding operations are stopped when the duration exceeds a prescribed setting time. COPYRIGHT: (C)2005,JPO&NCIPI

Description

technical field [0001] The invention relates to a grinding device and a method for judging the thickness of a ground material, in particular to a technology for determining the thickness of a ground material in a device and method for grinding optical parts such as lenses. Background technique [0002] Usually, when grinding optical parts such as lenses, the material to be ground is fixed on one of the upper grinding disc and the lower grinding disc, and the upper grinding disc and the lower grinding disc are relatively rotated and oscillated to perform grinding. As devices using this grinding method, there are known a ball core swing type grinding device and an Oscar type grinding device. In the core swing type grinding device, one grinding shaft (either one of the upper and lower sides) is rotated around a predetermined swing center, and the other grinding shaft is rotated at the same time. In the Oscar-type grinding device, one grinding shaft is connected to a grinding d...

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned conventional grinding methods, a lot of efforts have been made to control the thickness of the material to be ground with high precision. However, it cannot be said that the thickness accuracy of the material to be ground is already very high.

Especially in the ball center swing type grinding device and Oscar type grinding device, due to the influence of the swing action, it is difficult to improve the detection accuracy of the thickness of the material to be ground, and it is necessary to fine-tune the grinding time according to the actual measurement data of each device. , which requires high technical skills of the staff

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