In the operation of the chamfering machine, its power transmission mainly includes two aspects, namely, the headstock drive and the chamfer feed drive. In fact, the chamfering machine is similar to the mechanical cutting machine, but the feed direction and the cutting amount are different from the cutting machine, so the power transmission of the power transmission and the ordinary machine tool also have certain differences. For now, the headstock is usually a multi-stage gear transmission.
However, gears are mostly helical gears or herringbone teeth, tooth surface quenching to increase the hardness. Straight teeth can also be used on high speed shafts. In practical applications, the cutting speed of the chamfering machine is often kept within the range of 80 to 180 meters per minute. For large wall thicknesses such as 32 mm, large diameter steel pipe chamfers, the cutting speed is about 80mm/min, and the cutting power is generally above 75kW.
In this case, the headstock is suitable for four-gear transmissions, while taking into account the range of processing pipe diameters, it usually requires 4 to 6-speed mechanical transmission. In addition, in order to improve the mechanical efficiency and realize constant power cutting, the main motor needs frequency conversion and speed control, so the headstock structure is large and complex, and the cost is high. With the increasingly mature technology of hydraulic low-speed high-torque oil motors, the use of oil-motor-driven headstocks has gradually increased.
In this way, the entire transmission mechanism can be made more concise, and at the same time, the size of the headstock is reduced, the quality is reduced, the stepless speed regulation is adopted, the control is convenient, the use performance of the chamfering machine is greatly improved, and the chamfering performance is fully satisfied. Process requirements. In the power transmission, according to whether the headstock spindle moves or not, the chamfering feed method can be divided into a headstock fixed head motion feed type and a spindle headstock head box feed feed type.
According to the different driving methods, the chamfering feed on the steel pipe chamfering machine can be mainly divided into two modes: hydraulic drive feed and motor speed control drive feed. In comparison, the former has a simple structure and is easy to adjust. The motor speed-adjustable feed-in speed adjustment is intuitive, and the feed amount can be well controlled. It is mostly used for chamfering of large-walled, large-diameter automatic chamfering machines.http://www.chamferingmachinechina.com/