Design scheme for measurement and detection of max

2022-07-27
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Design scheme for large-scale measurement and detection

this scheme is a process research institute of rail transit industry. The measurement and detection of large parts are based on contact measurement and precision machinery technology

I. measurement principle

1 Inner diameter measurement

1) calibration of measuring tools: after the dial indicator (or dial indicator) and extension rod are installed, they are placed on the standard parts for calibration, so that the reading of the dial indicator is zero. The schematic diagram is as follows:

2) inner diameter measurement

place the dial indicator and extension rod on the workpiece to be measured, and observe the dial indicator reading, which is the difference between the size of the workpiece to be measured and the standard part, so as to obtain the size to be measured. The schematic diagram to avoid short shot, fracture, deformation, burr and even damage to the die of the finished product is as follows:

2 Measurement of outer diameter dimension

1) calibration of measuring tools: install the dial gauge and extension rod, and place them on the standard part for calibration, so that the dial gauge reading is zero. The schematic diagram is as follows:

2) measurement of outer diameter dimension

place the dial gauge and extension rod on the workpiece to be measured, and observe the dial gauge reading. The reading is the difference between the workpiece to be measured and the standard part. The dimension to be measured is thus measured. The schematic diagram is as follows:

3 Measurement principle:

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

advantages of this scheme

1) high accuracy, such as 2000mm size, can achieve ± 0.01mm lower sampling rate

2) high accuracy can be maintained for a long time

2 The market of China's plastic machinery enterprises will open up more application fields:

equipment manufacturing industries such as rail transit, military industry, aerospace, heavy industry and shipbuilding, automobile manufacturing, machine tool mold, processing equipment manufacturing, etc

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