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A method for measuring an object

A technology of objects and measuring probes, applied in measuring devices, instruments, etc., can solve the problem of consuming large battery power and time

Active Publication Date: 2012-02-29
RENISHAW PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process consumes a lot of battery power and time due to the actual number of points to be measured and thus the data to be transferred

Method used

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  • A method for measuring an object
  • A method for measuring an object
  • A method for measuring an object

Examples

Experimental program
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Embodiment Construction

[0040] Attached figure 2 A workpiece set on a machine tool is shown. The measuring probe 6 is mounted on the axis 2 of the machine tool and held in position by the machine tool holder 4 . This is the same location where the cutting tool will be held while machining feature 12 on workpiece 14 . The probe comprises a probe body 5 , a stylus 8 and a stylus tip 10 . The workpiece 14 is mounted on a machine table 16 .

[0041] In this case the axis 2 and measuring probe 6 can be moved in X, Y and Z directions by X, Y and Z drives controlled by the computer, the interface or the machine controller, while the table remains fixed. The X, Y and Z axis scales (which include counters for the outputs of the scales) show the instantaneous three-dimensional coordinates of the position of the axis 2 on which the measurement probe 6 is mounted. The measurement readings from the measurement probe 6 are combined with the readings from the X, Y and Z axis scales, allowing the position of th...

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PUM

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Abstract

A 'go, no-go' method is described for determining whether the dimensions of an object, such as a workpiece (40), conform to tolerance. The method uses a measurement probe, such as a touch trigger, analogue, or non-contact probe, mounted on a measuring apparatus such as a coordinate measuring machine, machine tool, or a lathe. The method comprises the step of driving the measurement probe around apath relative to the object, said path being based on a tolerance of the object. The path relative to the object may include at least a first path (46) based on the maximum tolerance of the object and a second path (44) based on the minimum tolerance of the object. The method additionally comprises the steps of monitoring any probe measurement data acquired by the measurement probe as the probe is driven around the path, and indicating if the dimensions of the object do not conform to tolerance only if there is a change in state of the probe measurement data that is acquired as the measurement probe is driven around the path.

Description

technical field [0001] The present invention relates to the use of measuring equipment to determine whether the dimensions of an object meet tolerances. In particular, the invention relates to a method of determining whether the dimensions of an object are within tolerance using a measuring probe mounted on a coordinate positioning device. Background technique [0002] Conventional methods for checking that objects meet tolerances include the use of "go, no-go" gauge blocks such as figure 1 shown. This "go, no go" gauge block typically handles plug, ring, cone, buckle and thread shapes and is reliable for tolerances down to about 0.05 mm. The "go" gauge 26 must be able to slide unhindered inside the machined bore 30, as in figure 1 or, conversely, no impeded slippage on machined protrusions; if it cannot, then the object is larger than its maximum material condition. The "no-go" gauge 24 must not slip inside the machined hole, in figure 1 In the case of , the object can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/04
CPCG01B21/04
Inventor 彼得·肯尼思·赫利尔
Owner RENISHAW PLC