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Measuring tool and method for measuring size of large-excircle workpiece by adopting same

A measuring tool and size technology, applied in the field of measuring tools, can solve the problems of being easily affected by ambient temperature, troubled by the quality of production and processing parts, and errors in vernier calipers, and achieve the effect of simple structure, consistent real-time status, and accurate measurement.

Inactive Publication Date: 2014-04-02
CHANGZHOU TIANSHAN HEAVY IND MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the large diameter tolerance was measured with a vernier caliper first, and then the inner micrometer was used to measure the vernier caliper to obtain the size of the workpiece. The main disadvantage of this measurement is: the vernier caliper itself has errors, and the two measurements have indirect measurement errors. Different people The measurement will show that there is no hand feeling error in different sizes
[0003] And the previous measurement method is easily affected by the ambient temperature. When the temperature fluctuates greatly, according to the traditional measurement method, different dimensions will be obtained by measuring the workpiece in different time periods, which will greatly affect the production process and the quality of the parts. troubles, rework and out-of-tolerance phenomena often occur

Method used

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  • Measuring tool and method for measuring size of large-excircle workpiece by adopting same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one, select the standard part, the size of the standard part measured by the three-coordinate measuring machine is 15.255mm, then measure the standard part with a measuring tool, the millimeter scale A on the main ruler 1 is measured to be 35mm, and the graduation scale B is 50mm (ie 0.50mm), use this measuring tool to continue to measure the outer circle of the workpiece to be measured, record the millimeter scale C on the main ruler 1 as 35mm, and record the graduation scale D of the dial indicator 4 as 65 (0.65mm); at this time The millimeter scale A and the millimeter scale C are equal to 35mm, then calculate the difference E between the graduation scale D and the graduation scale B, and the calculated difference E is 0.65mm-0.50mm=0.15mm, then the processing to be tested The size of the piece is the size of the standard piece plus the resulting difference E, that is, 15.255mm+0.15mm=15.405mm.

Embodiment 2

[0035] Embodiment two, select the standard part, the size of the standard part measured by the three-coordinate measuring machine is 15.255mm, then measure the standard part with a measuring tool, and the millimeter scale A on the main chi 1 is measured to be 35mm, and the graduation scale B is 50 (ie 0.50mm), use this measuring tool to continue to measure the outer circle of the workpiece to be measured, record the millimeter scale C on the main scale 1 as 36mm, and record the graduation scale D of the dial indicator 4 as 65 (0.65mm); at this time The millimeter scale A and the millimeter scale C are not equal, then calculate the difference F between the millimeter scale C and the millimeter scale A, that is, the difference F=36mm-35mm=1mm, the difference between the graduation scale D and the graduation scale B Value E, that is, the difference E=0.65mm-0.50mm=0.15mm, then the size of the processing to be measured is the size of the standard part plus the resulting difference ...

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Abstract

The invention relates to a measuring tool. The measuring tool comprises a main scale and a vernier scale, wherein the main scale is provided with a left clamping foot, the vernier scale is provided with a right clamping foot, a support seat is arranged on the right clamping foot, a dial gauge is mounted on the support seat, and a gauge head of the dial gauge is arranged opposite to the left clamping foot. According to the measuring tool, the size of a machining excircle can be obtained through directly measuring the excircle without the conversion of other measuring tools, and then, indirect measurement errors are eliminated. A method for measuring the size of a large-excircle workpiece by adopting the measuring tool comprises the steps: firstly, measuring the size of a standard workpiece, then, measuring the standard workpiece by using the improved measuring tool, and recording a millimeter scale A on the main scale and an indexing scale B of a pointer of the dial gauge; continuing to measure a machining workpiece to be measured, and recording a millimeter scale C on the main scale and an indexing scale D of the dial gauge; calculating the difference value E between the indexing scale D and the indexing scale B, thereby obtaining the size of the machining workpiece to be measured, which is equal to the sum of the size of the standard workpiece and the obtained difference value E. The method has the advantages that the influence on measurement caused by hand feeling and temperature is avoided, and the accuracy of measurement is improved.

Description

technical field [0001] The invention relates to a measuring tool and a method for measuring the size of a large outer circle workpiece by using the measuring tool. Background technique [0002] In the past, the large diameter tolerance was measured with a vernier caliper first, and then the inner micrometer was used to measure the vernier caliper to obtain the size of the workpiece. The main disadvantage of this measurement is: the vernier caliper itself has errors, and the two measurements have indirect measurement errors. Different people The measurement will show that there is no hand feeling error in different sizes. [0003] And the previous measurement method is easily affected by the ambient temperature. When the temperature fluctuates greatly, according to the traditional measurement method, measuring the workpiece in different time periods will give completely different dimensions, which will cause great damage to the production process and the quality of the parts....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00
Inventor 王露牟杏华陈思洁倪官仁姜维杰
Owner CHANGZHOU TIANSHAN HEAVY IND MACHINERY
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