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Grating ruler

A technology of grating scale and grating line, which is applied in the field of grating scale, can solve the problem that the repeatability error cannot meet the processing requirements, and achieve the effect of improving precision and eliminating repeatability error

Active Publication Date: 2015-07-01
ZHUHAI EASSON MEASUREMENT TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For processing with high precision requirements, the existence of this repeatability error will not be able to meet the processing requirements

Method used

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Examples

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Embodiment Construction

[0024] Such as Figure 1 to Figure 6 As shown, the present invention includes a reading head device and a ruler body device. A glass grating ruler 1 engraved with grating lines is arranged in the ruler body device. The ruler body device is an aluminum profile. 1 Fix on the ruler body device by glue bonding. The ruler body device has holes and is fixed on the bed of the machine tool by screws. The reading head device is fixed to the moving worktable shaft by screws. When the worktable shaft of the machine tool moves, the reading head device of the grating ruler scans the glass grating lines in the ruler device to generate photoelectric signals, which are processed by the signal processing unit. Get the position information of the grating ruler. The reading head device includes a reading head support 2 and a trolley scanning device 3, and the trolley scanning device 3 is fitted on the ruler body device and can move back and forth along the ruler body device. The reading head s...

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Abstract

The invention aims to provide a grating ruler which can eliminate measuring repeatability errors and can greatly improve measuring precision. The grating ruler comprises a reading head device and a ruler body device, a glass grating ruler engraved with grating line patterns are arranged in the ruler body device, the ruler body device is fixed onto a body of a machine tool, the reading head device comprises a reading head support and a trolley scanning device, the reading head support is connected onto a movable worktable of the machine tool and clamped on the trolley scanning device in a matched manner, a tension device is positioned at one end of the reading head support along the ruler body direction of the glass grating ruler, a thrust device is arranged at the other end of the reading head support, the tension device tensions one end of the trolley scanning device and contacts with the trolley scanning device, the thrust device contacts with the trolley scanning device and thrusts the trolley scanning device, the tension of the tension device and the thrust of the thrust device are consistent in direction and positioned on the same straight line, and the direction is consistent with the ruler body direction of the glass grating ruler. The grating ruler can be applied to the field of measuring equipment.

Description

Technical field [0001] The invention relates to a measuring device, in particular to a grating ruler. Background technique [0002] At present, the precision and speed requirements of CNC machine tools are getting higher and higher. When the ball screw and its nut move back and forth quickly on the machine tool table, the ball screw starts to generate heat and temperature rise, and the position measurement using a grating ruler becomes more and more important. The grating ruler is applied to the closed-loop system of CNC machine tools, mainly to solve the thermal deformation caused by the rapid movement of the ball screw and its nut back and forth on the machine tool table, and the position measurement of the grating ruler improves the machining accuracy of the machine tool. [0003] Usually the grating ruler installed on the machine tool will have a repeatability error when measuring, because the grating ruler has a bracket and a trolley in the reading head, and there will be a ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/24
CPCB23Q17/24
Inventor 张传敏黄志良张松涛
Owner ZHUHAI EASSON MEASUREMENT TECH
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