Large-size measurement and detection design solution

This solution is for a rail transit industry process research institute, large parts size measurement and inspection, based on contact measurement and precision mechanical technology.

I. Measurement principle

1. Inner diameter measurement

1) Gauge calibration: Install the dial indicator (or micrometer) and the extension rod, place it on the standard part for calibration, and make the dial indicator read zero. The schematic diagram is as follows:

2) Inner diameter measurement

: Place the dial indicator and the extension rod on the workpiece to be measured, and observe the dial indicator reading. The reading is the difference between the size of the workpiece to be measured and the standard part, and the measured size is obtained from it. The schematic diagram is as follows:

2. Measurement of outer diameter

1) Gauge calibration: Install the dial indicator and extension rod, place them on the standard part for calibration, and make the dial indicator read zero. The schematic diagram is as follows:

2) Measurement of outer diameter

: Place the dial indicator and the extension rod on the workpiece to be measured, and observe the dial indicator reading. The reading is the difference between the size of the workpiece to be measured and the standard part. The size to be measured is thus measured. The schematic diagram is as follows:

3. Measurement principle:

Precision detection of large sizes is a difficult problem in the machinery industry. We use a precisely calibrated reference size (standard part or gauge block) to compare with the size to be measured. Use a dial indicator and an extension rod to measure the size to be measured. When the difference between the size to be measured and the reference value is zero, the size to be measured is equal to the reference value, thereby accurately measuring the size to be measured. If the difference between the size to be measured and the reference value is not zero, the difference is the actual deviation of the size to be measured.

Advantages of this solution

1) High precision, for example, the size of 2000mm can reach ±0.01mm
2) High precision can be maintained for a long time

II. Application areas:

rail transportation, military industry, aerospace, heavy industry shipbuilding, automobile manufacturing, machine tool molds, processing equipment manufacturing and other equipment manufacturing industries.