Reasonable use of gage gauges and some precautions in daily use can prevent some problems from occurring, and exert physical properties in gage gauges
First, check the plug gauge surface before use, and there should be no rust.
丕, scratches, dark spots, etc.; signs of plug regulations should be correct and clear.
Second, the standard conditions for plug gauge measurement are: temperature is 20°C, and force measurement is 0.
It is difficult to meet this requirement in practical use. In order to reduce the measurement error, try to use the plug gauge and the device under test to measure under isothermal conditions. Use a force that is as small as possible. Do not push the plug gauge into the hole or push it sideways.
Third, when measuring, the plug gauge should be inserted or pulled out along the axis of the hole, and should not be tilted; plug gauges should be stuffed into the hole, and it is not allowed to turn or shake the plug gauge.
Fourth, it is not allowed to use plug gauges to detect unclean workpieces.
Fifth, the plug gauge is one of the precision measuring instruments. It should be handled with care and must not touch the working surface.
Sixth, after each use, the plug gauge must be cleaned with a clean soft cloth or fine cotton yarn to clean the surface of the plug gauge. After applying a thin layer of rust preventive oil, it shall be placed in a dedicated box and stored in a dry place. Plug regulations shall be subject to periodic verification. The verification period shall be determined by the measurement department.
When used, the correct operation of the gauge can be summarized as "light", "positive", "cold", "full".
Light: Take it lightly, securely and reliably;
Can not be thrown at random;
Do not collide with the workpiece. Check the workpiece after it has stabilized.
When testing, light-duty light plugs are not required, and hard-card stuck plugs are not allowed.
Positive: The position must be placed positively, and it cannot be skewed, otherwise the test result will not be reliable.
Cold: When the workpiece to be inspected is in conformity with the gauge temperature, the inspection can be carried out;
Precision parts should be isothermal with gauges.
All: Gauges are required to test the workpiece in order to obtain correct and reliable inspection results. The plug end must be inspected over the entire length of the hole, and must be tested in 2 or 3 axial planes.
The end of the plug must be tested as far as possible at both ends of the hole.
Both the end of the caliper and the end of the caliper should be tested along the shaft and at no less than 4 positions around the shaft.