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Surface Sensing Devices

A technology for sensing equipment and the surface of workpieces, applied in the field of surface sensing equipment, can solve the problems of restricting the number of surfaces, the tip of the stylus cannot reach the surface of the workpiece, and the information of the surface contour cannot be obtained.

Inactive Publication Date: 2011-12-07
RENISHAW PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But some probes, such as optical probes and surface finish probes, are unidirectional, meaning they can only sense a part from one direction, limiting the number of surfaces they can touch
[0008] Occasionally the stylus tip cannot reach the surface of the workpiece due to the various shapes of the workpiece and the physical dimensions and constraints of the probe head motion
Therefore, no information about the surface profile can be obtained

Method used

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Embodiment Construction

[0045] refer to figure 1 , the coordinate system on the coordinate locator may be defined by three mutually orthogonal axes 1A, 2A and 3A, so that in use, 1A is substantially vertical and 3A is substantially horizontal. If the axis 1A is at the 0 degree position in the paper, moving from the 0 degree position to the 90 degree position also in the paper can be achieved by rotating counterclockwise around the axis 2A.

[0046] figure 1 A preferred embodiment of the invention is shown in a three-dimensional view, figure 2 shows the figure 1The plane defined by the axes 1A and 2A passes through the section of the device. The support 7, in this case the articulated probe head, comprises first and second housing members 1 and 2, respectively. The first housing member 1 is fittingly connected to a position determining device 26 (eg an arm of a CMM) and houses a motor M1 for effecting an angular displacement of the first shaft 20 about the first axis 1A. Connected to the first s...

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Abstract

An apparatus for measuring a surface of a workpiece is described. The apparatus comprises a support (7), attachable to the moveable arm of a machine (26), such as a coordinate positioning machine, and rotatable about first (1A) and second (2A) axes of rotation, the axes driven by first (M1) and second (M2) motors respectively. The apparatus additionally comprises a surface sensing device (4) for sensing the surface of a workpiece, rotatable about a third axis of rotation (4A). This third axis (4A) of rotation is alignable with the first axis of rotation (1A), and when aligned, rotation of the support (7) relative to the surface sensing device (4) is actuatable by the first motor (M1) when the surface sensing device (4) is held stationary by a holder (70). A method for using an apparatus for measuring a surface of a workpiece is also described.

Description

technical field [0001] The invention relates to a surface sensing device for use in a position determining device, such as eg a coordinate measuring machine (CMM), a scanner, a machine tool, or an inspection / measurement robot. Background technique [0002] Such position determination machines (see eg US-A-3,727,119 describing a CMM) are used to measure workpieces and generally comprise an arm movable in three directions x, y, z relative to a table supporting the workpiece. The movement of the arm in each direction x, y, z is measured by a transmitter on the machine and a probe mounted on the arm produces a signal indicative of the relationship between the surface of the workpiece to be measured and the arm. From this, the position of the workpiece surface can be determined. [0003] In alternative machines, such as some types of machine tools, the table moves in the x and y directions, while the arm moves in the z direction. [0004] It is known to provide a scanning probe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/012
CPCG01B5/012G01B11/007
Inventor 戴维·斯文·瓦利亚塞彼得·海杜基威兹若弗雷·麦克法兰
Owner RENISHAW PLC