The rolling speed of the rolling tube has little effect on the surface roughness, so we can increase the speed of rolling to improve its production efficiency. The number of rolling is not too much, and the rolling effect is the most significant. Reduce the roughness by 2 to 3 levels. Second, three times. The amount of feed should be determined by the diameter of the ball. The smaller the feed amount, the smaller the surface roughness. The optimum feed rate should be determined by experimentation.
Rolling tools for rolling pipes usually use balls, cylindrical rollers, conical rollers, rollers, and the like. However, the use of balls as deforming members reduces the cost of the entire rolling tool. Moreover, the ball has high precision, high hardness, and small contact surface with the workpiece. With a small rolling pressure, a small interference can obtain a higher pressure and a smaller roughness. Moreover, the ball has a long service life, is not easy to wear, is inexpensive, and is easy to replace.
The material of the rolling tube is soft and plastic, and it is easy to be rolled. As the plasticity decreases and the hardness increases, the amount of permanent deformation decreases. Generally, the rolling effect of steel and copper is better, and the effect of cast iron is poor. Wrought iron, ductile iron has better rolling effect than gray cast iron.www.ht-tube.com