Active thread and contour scanning device and method

A scanning device and active technology, which is applied in the field of measuring instruments, can solve the problems of large measuring force, stuck stylus, easy detachment of the stylus from the surface, etc., and achieve the effect of improving the scanning speed

Pending Publication Date: 2018-05-01
CHOTEST TECH INC
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] (1) The stylus is easy to wear
[0007] (2) When scanning trapezoidal threads and large slope contours, the measuring force is too large, and even the stylus is stuck.
[0008] (3) When scanning trapezoidal threads and large-slope contours, the stylus is easy to detach from the surface, so the measured data cannot truly reflect the shape of the thread and large contours

Method used

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  • Active thread and contour scanning device and method
  • Active thread and contour scanning device and method
  • Active thread and contour scanning device and method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0045] An active thread and contour scanning method includes a method for controlling a constant measuring force of a stylus following a workpiece and a method for limiting a horizontal scanning speed.

[0046] According to the control method of constant measuring force of the stylus following the workpiece, according to the feedback data of the force measuring feedback mechanism, the speed and direction of the movement of the vertical axis are controlled at a relatively high frequency, so as to realize the constant measuring force following the workpiece.

[0047]In the horizontal scanning speed limiting method, when the force measurement feedback value is less than a certain value, the scanning speed in the horizontal direction is attenuated or even stopped, and when the horizontal tension detection mechanism is greater than a certain va...

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Abstract

The invention provides an active thread and contour scanning device, and the device comprises a measuring probe, a force measurement feedback mechanism, a horizontal measuring rod, a horizontal pull detection mechanism, and a movement system. The measuring probe is disposed on the force measurement feedback mechanism, and the force measurement feedback mechanism is connected with the horizontal pull detection mechanism through the measuring rod. The horizontal pull detection mechanism is connected with the movement system. The invention also provides an active thread and contour scanning method based on the device. The beneficial effects of the invention are that the device and method guarantee that a measured force in a measurement process is basically constant through the real-time adjustment of the amplitude of the measured force, thereby guaranteeing that the measured data reflects the thread and contour surface more really; the device and method solve problems of climbing and descending in a scanning process, such as a problem that the measuring probe breaks away from the surface of a workpiece, and a problem that the measuring probe is clamped and damaged; the device and method increase the scanning speed.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to an active screw thread and contour scanning device and method in the measuring instrument. Background technique [0002] In the thread and profile measurement process, the method of contact scanning between the stylus and the measured surface is used for measurement. The force between the stylus and the measured surface is an important factor affecting the accuracy of the thread and profile. During thread and contour scanning, the measuring force of the stylus acting on the surface of the workpiece to be measured needs to be kept constant; the position of the stylus needs to be adjusted in time on the downhill to ensure that the stylus does not leave the surface of the workpiece to be measured; on the uphill and the slope is very steep It is necessary to adjust the position of the stylus in time to ensure that the stylus will not be stuck. [0003] Most of the existing stylus and contou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
CPCG01B11/2425
Inventor 黄正青马俊杰邹功文
Owner CHOTEST TECH INC
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