Cycloid type scanning measurement trajectory planning method and system for free-form surface

A trajectory planning and scanning trajectory technology, which is applied in the field of cycloid scanning measurement trajectory planning methods and systems, can solve problems such as vibration of a rotating shaft, and achieve the effects of reducing motion load, improving kinematic performance, and improving measurement accuracy and efficiency.

Active Publication Date: 2021-05-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide a cycloidal scanning measurement trajectory planning method and system for free-form surfaces, aiming at solving the vibration problem of the rotating shaft

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  • Cycloid type scanning measurement trajectory planning method and system for free-form surface
  • Cycloid type scanning measurement trajectory planning method and system for free-form surface
  • Cycloid type scanning measurement trajectory planning method and system for free-form surface

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

[0067] like figure 1 Shown is a schematic flow chart of a cycloidal scanning measurement trajectory planning method for free-form surfaces provided by an embodiment of the present invention. figure 1 The method shown includes the following steps:

[0068] (1) Probe trajectory curve generation step: the offset surface S for the measured surface S r Carry out partitions, generate corresponding p...

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Abstract

The invention discloses a cycloid type scanning measurement trajectory planning method and system for a free-form surface, belongs to the field of five-axis continuous measurement of the free-form surface, and aims to improve the dynamic performance of a machine by avoiding frequent acceleration and deceleration of a rotating shaft of a measuring head so as to improve the measurement efficiency. The method comprises a measuring head track curve generation step, a cycloid step length determination step and a cycloid scanning track expansion step. According to the invention, in the scanning measurement process, the C axis can be always kept in the same rotation direction, the constant angular velocity can be kept when necessary, vibration caused by sudden change of the rotation direction of the C axis is avoided, the dynamic performance of a measuring machine is remarkably improved, the track length of a measuring head can be remarkably shortened, the motion amount of a linear axis is reduced, and the measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the field of five-axis measurement, and more specifically relates to a cycloid scanning measurement trajectory planning method and system for free-form surfaces. Background technique [0002] Freeform surface measurement is more and more widely used in industrial product manufacturing, especially for parts that require high precision. Among various measurement methods, Coordinate Measuring Machine (CMM) is used because of its high precision and high efficiency And other characteristics, it is often used as the first choice for measuring free-form surfaces. Compared with three-axis CMM (point-by-point discrete measurement) and three + two-axis CMM (three-axis linkage scanning measurement with fixed probe orientation), five-axis CMM measurement can not only realize efficient continuous scanning measurement of five-axis simultaneous linkage , but also make full use of the geometric characteristics of the surface and the unique dy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 胡鹏程黄丽华陈吉红
Owner HUAZHONG UNIV OF SCI & TECH
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