What are the operating procedures of friction welding machine

Friction welding machine operating rules

1. Preparatory work

1. Understand welding materials and their properties;

2. Accurately understand the geometry and size of welding materials;

3. Select the shape and processing method of friction welding head.

Second, friction welding machine heating stage

1. Fix the workpiece to the friction welding equipment to ensure that there is no gap between the contact surface of the workpiece and the equipment;

2. Start the equipment, let the workpiece heat and maintain a certain temperature, generally 30 ~ 50 ° C above the melting point of the welding material, and the

time is generally controlled between a few seconds and ten seconds.

Third, friction welding machine pressure stage

1. When the workpiece reaches a certain temperature, the heater stops heating, and the upper and lower fixtures are pressed at the same time, so that the welding

surface contacts the internal structure to produce plastic deformation and extrude needle-like metal particles.

2. The speed of downward pressure is generally 0.3-2mm/s, and the downward pressure is generally 200-600kN.

Fourth, differential rotation and vibration stage

1. After stopping the downward pressure, the upper and lower parts of the friction welding equipment rotate and vibrate differently, resulting in friction heat.

2. The rotation speed is generally 100-1500r/min, and the vibration frequency is generally 50-200Hz.

Five, friction welding machine welding completion stage

1. When the friction interface temperature reaches the melting point or the contact stress reaches a certain value, the welding is completed.

2. Stop and lift the equipment, cut the part of the welded structure manually, and test.

Six, precautions

1. The operation shall be carried out in strict accordance with the operating procedures, and it is forbidden to modify or skip any step;

2. The equipment should be cleaned before welding to reduce the impact of pollutants on welding quality;

3. The heating speed, downforce and speed, rotation speed and vibration frequency should be adjusted according to the welding material and its characteristics.