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Thread profile scanning device

A scanning device, thread profile technology, applied in measurement devices, optical devices, instruments, etc., can solve problems such as difficult measurement, broken stylus, and wear

Active Publication Date: 2017-12-26
CHOTEST TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional contact thread scanning measurement, for the test piece with a large slope, the stylus is forcibly pulled up the test piece during scanning measurement, and the force on the stylus along the normal phase of the slope of the test piece continues to increase during the climbing process. large, resulting in serious deformation and wear of the stylus, and even prone to stylus breakage and other problems, the stylus cannot smoothly climb to the highest point of the thread of the tested part, so the traditional contact scanning method is difficult to achieve large-slope measured parts Measurement

Method used

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Examples

Experimental program
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Embodiment 1

[0035] like figure 1 As shown, this embodiment provides a thread profile scanning device, which includes a stylus 1, a swing rod 2, a rotating shaft mechanism 3, a pressure driving mechanism 4, a force measuring mechanism 5, a tension driving mechanism (not shown in the figure), a control device 6 and rack 8.

[0036] The stylus 1 is a needle-shaped object, used to contact and scan the threaded surface of the measured object, fixed on one end of the swing rod 2 and perpendicular to the axis of the swing rod. The swing rod 2 is fixed on the rotating shaft mechanism 3 and can swing around the rotating shaft mechanism in a direction parallel to the probe 1 . The pressure driving mechanism 4 is fixed on the slide table 512, which can drive the swing rod 2 to rotate in the axial direction, and the pressure G exerted by the measuring needle 1 on the measured object is provided through the swing rod 2, and the tension driving mechanism is connected with the force measuring mechanism...

Embodiment 2

[0053] like Image 6 As shown, a thread profile scanning device of this embodiment adds a third displacement sensor 7 on the basis of the first embodiment above.

[0054] The third displacement sensor 7 is an arc grating, which is fixed on the frame 8 and is electrically connected to the controller 6, and is used to monitor the displacement of the swing rod 2 relative to the frame 8 in the Z-axis direction, and generate a corresponding displacement of the swing rod 2 according to the displacement. The Z-axis displacement signal is transmitted to the controller 6, and the controller 6 calculates the angle of the thread slope according to the obtained Z-axis displacement signal and the moving speed of the pendulum 2, and then controls the tension driving mechanism to adjust the pendulum 2 according to the calculated angle. movement speed. For steep slopes, slow down the scanning speed; for gentle slopes, speed up the scanning speed. It is guaranteed that the slope with a large...

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Abstract

The invention provides a thread profile scanning device, comprising: a measuring needle; a swing rod, the measuring needle is fixed at one end of the swing rod and is perpendicular to the axial direction of the swing rod; a rotating shaft mechanism, the swing rod is fixed on the rotating shaft mechanism; a pressure driving mechanism, The pressure driving mechanism is connected with the other end of the swing rod; the force measuring mechanism is fixed together with the rotating shaft mechanism; the tension driving mechanism; and the controller. Since the force measuring mechanism measures the tension on the stylus in real time, and transmits the measured tension value information to the controller, the controller calculates the pressure value to be applied to the stylus according to the obtained tension value, and controls the pressure driving mechanism Realize real-time adjustment of pressure value. The resultant force value of the tension and pressure on the stylus is always kept within the preset range, and the force of the stylus scanning the large-angle slope is the same as that of scanning the gentle slope, and the stylus can complete the large-angle climbing. Slope, realize the scanning of thread profile with large angle or partial T slope.

Description

technical field [0001] The invention relates to a thread measuring device, in particular to a thread profile scanning device. Background technique [0002] The thread measuring equipment is used to detect and analyze the geometric parameters of the thread, and judge whether the thread is qualified or not. Thread parameters can be, for example, pitch, major diameter, intermediate diameter, minor diameter, profile angle, taper, and the like. One way of thread measuring equipment to measure threads is to measure by touching and scanning the thread surface of the tested object with a stylus. In order to make the stylus contact the threaded surface of the tested object reliably, a certain pressure is usually applied to the stylus. [0003] In the traditional contact thread scanning measurement, for the test piece with a large slope, the stylus is forcibly pulled up the test piece during scanning measurement, and the force on the stylus along the normal phase of the slope of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 马俊杰张和君朱建雄邹功文
Owner CHOTEST TECH INC