How does the shaft transfer the power of the pipe cutter?
Pipe cutting machine refers to a machine tool for pipe cutting under flammable, explosive or toxic and hazardous working conditions. The main feature is mechanical cold cutting under the premise of no sparks, low temperature, and without changing the physical and chemical properties of the pipe material. The blade strength and heat dissipation are good. The power transmission adopts the hydraulic method, and the torque of the hydraulic motor is distributed to the pipe cutting unit and the automatic crawling unit through the transmission shaft. The function of the drive shaft of the explosion-proof pipe cutting machine is mainly to support and rotate the milling blades and bevel blades of the explosion-proof pipe cutting machine, and transmit the movement and power of the hydraulic motor of the explosion-proof pipe cutting machine in the hydraulic system through the shaft. The design requirements for the shaft of the explosion-proof pipe cutting machine: have sufficient strength to transmit power and torque; have a reasonable structure; and have a good processing technology. There are many types of shafts used in the industrial field. According to the axis classification, they can be divided into straight shafts and crankshafts. Among them, the straight axis is divided into the optical axis and the stepped axis. Explosion-proof pipe cutting machines mostly use straight shafts, and stepped shafts are more common. According to the load-bearing situation, it can be divided into mandrel, rotating shaft and transmission shaft. Its central axis is only subjected to bending moments, and plays a supporting role. The rotating shaft bears bending moment and torque at the same time. The drive shaft only bears torque but not bending moment or bears very small bending moment. Pipeline explosion-proof cutting machine Under normal circumstances, the shaft material of the explosion-proof pipe cutting machine adopts carbon steel, among which the commonly used carbon steel is 30, 40, 45 and 50 steel. Different materials are used for matching and loading according to different transmission torques. In addition, there is a spare part that uses alloy steel shafts, which will not be detailed here. The assembly is carried out in strict accordance with the "Pioneer Pipeline Explosion-proof Pipe Cutting Machine Assembly Regulations", and various shaft applications are distinguished. A lot of shafts are used, but the materials should be selected correctly according to the actual use and endurance. 1. Shaft structure 1.1 The names of the segments on the axis The shaft section used in the pipe cutting machine can be divided into journal, shaft body, shaft shoulder or collar. Among them, the journal is divided into a supporting journal and a working journal. The supporting journal is mainly used for assembling bearings or sliding bearings. The working journal is mainly used to assemble rotating parts, such as gears and pulleys. The shaft body is mainly used to connect the working journal and the supporting journal. The shaft shoulder or collar is mainly the part corresponding to the change in the cross-sectional dimension of the shaft. 1.2 Requirements for the shaft structure of the pipe cutting machine 1.2.1 The parts on the shaft should be reliably fixed in the circumferential direction and in the axial direction; 1.2.2 The shaft of the pipe cutter should be easy to process and try to avoid or reduce stress concentration to avoid bending or breaking; 1.2.3 Try to choose the taper design to facilitate the installation and disassembly of the parts on the shaft.