The measuring machine is a measuring instrument whose normal operating temperature should be 20 °C ± 2 °C. The length reference of the measuring machine - the grating is corrected according to 20 ° C. The measuring machine is also assembled and debugged at this temperature. When the temperature deviation is too large, the measurement accuracy will be greatly affected.

1, temperature is the biggest factor affecting the accuracy of the measuring machine

In the machine room of the measuring machine, the temperature rises from bottom to top, and the temperature changes every moment. Therefore, the difference between the grating temperature and the part temperature of each axis affects the accuracy of the measurement of the measuring machine. This is the biggest factor affecting the accuracy of the measuring machine. Linear correction and temperature correction can be used in the measuring machine software to correct the temperature effects for the environmental conditions of the field inspection. When we use the measuring machine, we should try to keep the ambient temperature of the measuring machine room consistent with the inspection time. In addition, electrical equipment, computers, and personnel are all heat sources. Plan the equipment when it is installed so that electrical equipment, computers, etc. have a certain distance from the measuring machine. Do not have extra staff to stay in the measurement room to strengthen management. The management of the high-precision measuring machine environment should be stricter.

2, the influence of the wind direction of the air conditioner on the temperature of the measuring machine

Air conditioners in the measurement room should try to choose inverter air conditioners. Inverter air conditioner energy saving performance is good, the most important is the strong temperature control ability. In the case of normal capacity, the temperature can be controlled within ±1 °C.

Since the temperature of the air blown by the air conditioner is not 20 ° C, the wind must not be blown directly onto the measuring machine. Sometimes, in order to prevent the wind from blowing onto the measuring machine and turning the wind direction to the wall or one side, there is a case where the inside of the machine room is hot and cool, and the temperature difference is very large.

The installation of the air conditioner should be planned. The wind should be blown to the main position in the room, and the wind direction should form a large cycle (not to be blown to the measuring machine), and the indoor temperature should be balanced as much as possible.

If conditions permit, the air duct should be installed to send the wind to the top of the room through the double-layer orifice to supply air, and the return air outlet is in the lower part of the room. This allows the airflow to flow irregularly, which makes the temperature control of the equipment room more reasonable.

3. The influence of the switching time of the air conditioner on the temperature of the equipment room

Many users manage the air conditioning in the measurement room by turning on the air conditioner when using the measuring machine and turning it off when it is used. This practice has a great influence on the accuracy of the measuring machine. To keep the temperature of the measuring machine consistent with the temperature of the air, it is necessary to keep the temperature constant for more than 24 hours. The temperature of the machine room is always changing when the air conditioner is turned on or off. The temperature of the measuring machine is also changing, and the machine is in an unstable state. The accuracy will be very poor.

In this case, the insulation performance of the equipment room should be maximized. The air conditioner should be turned on every morning at work, and the air conditioner should be turned off after work at night. After the standby room temperature is stable for about 4 hours, the accuracy of the measuring machine can be stabilized.

This way of working seriously affects the efficiency of the measuring machine, and it is difficult to guarantee the accuracy in winter and summer. It will also have a great impact on the normal stability of the measuring machine.

4, the impact of the structure of the machine room on the temperature of the machine room

Since the measuring machine room requires constant temperature, the machine room must have insulation measures. If you have windows, use double-glazed windows and avoid sunlight. The transition door should be used as much as possible to reduce the temperature loss. The air conditioning of the equipment room should be equal to the room. If the equipment room is too large or too small, it will cause difficulty in temperature control.

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