Analysis of the influence of temperature on the accuracy of steel wire bender

Analysis of the influence of temperature on the accuracy of steel wire bender

Temperature change will really affect the accuracy of wire bending machine, and the main reasons include material characteristics, thermal sensitivity of mechanical parts and hydraulic/electrical system. The following are the specific impacts and suggestions:

1. Materials expand when heated and contract when cooled.

Steel wire itself: when the temperature rises, the steel wire expands, resulting in the actual size after bending being larger than the set value; When the temperature decreases, it contracts, and the size may be small.

Machine structure: the metal frame (such as cast iron or steel parts) is slightly deformed due to temperature changes, which affects the alignment accuracy of the mold and tool.

Example: A temperature difference of 10°C may cause a change of about 0.1mm per meter of steel wire length (the linear expansion coefficient of steel is about 12× 10/C).

2. Influence of key components

Transmission system:

Ball screw/guide rail: Temperature change may lead to the change of preload, increase the reverse clearance or friction, and reduce the repeated positioning accuracy.

Servo motor: High temperature may affect the stability of encoder signal and lead to control error.

Hydraulic system (if applicable): the increase of oil temperature will reduce the viscosity of oil, lead to pressure fluctuation and affect the consistency of bending force.

3. Ambient temperature and compensation measures

Ideal environment: keep the workshop temperature constant (such as 20±2°C), especially for high-precision machining.

Temperature compensation:

High-end bending machine may be equipped with real-time compensation system, and the control parameters are adjusted by temperature sensor.

Regularly calibrate the mold position, especially in the season with large temperature difference.

4. Suggestions for operation

Preheating: Run idle for 10-15 minutes after startup to make the machine reach a stable temperature.

Material management: store the steel wire in a constant temperature environment to avoid size fluctuation caused by temperature difference before processing.

Monitoring: check the temperature of key components with infrared thermometer during processing.

summary

The influence of temperature on the accuracy is usually within ±0.1mm (which may be neglected under ordinary accuracy requirements), but it is necessary to strictly control micron-scale high-precision bending or long-size workpieces. If seasonal accuracy deviation is found, it is suggested to check the influence of environmental temperature change first.