Some matters needing attention in the use of auto gage

Author：Web　Source：Web　Date：2018-06-23 15:42:14　Sentiment：79

First, check the measuring surface of the plug gauge before use, no rust can be found. PI feng, scratch, black spot, etc. The mark of the plug gauge should be correct and clear.

Secondly, plug gauge measurement standard conditions: temperature is 20 ° C, load is zero. 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 measured piece under isothermal conditions. The force should be as small as possible.

Third, when measuring, the plug gauge should be inserted or pulled out along the axis of the hole, not inclined; Plug gauge into the hole, do not turn or shake the plug gauge.

Fourth, it is not allowed to use plug gauge to detect dirty workpiece.

1-2. JPG

5. The plug gauge is one of the precision measuring tools. When used, it should be handled lightly and not touched its working surface.

6. After each use of the plug gauge, the surface of the plug gauge shall be immediately wiped clean with a clean soft cloth or fine cotton yarn. After applying a thin layer of anti-rust oil, the plug gauge shall be put into a special demand box and stored in a dry place

8. The stoppers shall be subject to periodic verification, and the verification period shall be determined by the metrology department.

When used, the correct operation method of the gauge can be summarized as "light", "positive", "cold" and "all".

Light: light handle, safe and reliable; You can't throw it; Do not collide with the workpiece, the workpiece will be stabilized before inspection; The inspection should be light plug, not hard plug.

Positive: the position must be positive, not skew, otherwise the test results will not be reliable.

Cold: when the temperature of the workpiece under inspection is consistent with that of the gauge, the inspection can only be carried out. Precision workpiece should be isothermal with gauge.

All: the workpiece shall be inspected by the gauge comprehensively to obtain correct and reliable inspection results. The end of the plug gauge shall be inspected on the whole length of the hole, and also in two or three axial planes. Check the end of the plug gauge as far as possible at both ends of the hole. The end and end of the caliper shall be inspected at no less than 4 positions along and around the shaft.