In the mechanical processing process, the common methods of plate cutting include manual cutting, semi-automatic cutting machine cutting and CNC cutting machine cutting. Manual cutting is flexible and convenient, but the quality of manual cutting is poor, the dimensional error is large, the material waste is large, the subsequent processing workload is large, the working conditions are bad, and the production efficiency is low. The profile cutting machine in the semi-automatic cutting machine has a good quality of cutting the workpiece, and it is not suitable for single piece, small batch and large workpiece cutting because of the use of the cutting die. Other types of semi-automatic cutting machines, while reducing the labor intensity of workers, are simple in function and are only suitable for cutting parts of more regular shapes. Compared with manual and semi-automatic cutting methods, CNC cutting can effectively improve the cutting efficiency and cutting quality of the sheet and reduce the labor intensity of the operator. At present, some small and medium-sized enterprises in China even use manual cutting and semi-automatic cutting methods in some large enterprises. The numerical control system of the CNC flame cutting machine equipment controls the trolley on the main beam to move longitudinally, and controls the carriage with the torch to move in the lateral direction. The horizontal and vertical movements are combined into the movement path of the torch, that is, the workpiece to be cut. shape. At the same time, the PLC in the flame cutting CNC system realizes the valve action and timing control of the cutting gas path. In the CNC flame cutting machine system, in order to keep the distance between the cutting head and the steel plate constant, an automatic height adjustment device must be provided.
Control system hardware and software components. Since the control precision, working speed and load requirements of the CNC flame cutting machine are not very high, the stepping motor can be used to realize the motion control in an open loop manner. The industrial control machine and the motion control card cooperate to complete the control function of the control system. The motor driver of the control system can realize the chopper constant current subdivision drive, improve the motor motion precision, and better solve the heat generation problem during high torque driving. The peripheral control circuit is composed of PLC, relay, etc. Its output can control the solenoid valve of the gas path, the contactor coil, etc., to realize the timing control of the gas path. CNC flame cutting machine is a high-efficiency, high-precision, high-reliability thermal cutting equipment that combines computer control, precision mechanical transmission, oxygen and gas cutting technology. It is suitable for new high-precision steel plate thermal cutting equipment for shipbuilding, steel structure, electric power, boiler, rolling stock, petrochemical and other manufacturing industries. The products are mainly used in CNC, flame-cutting machines for computer automatic control of plate, pipe and wire-type metal materials in the fields of shipbuilding, boiler manufacturing, container manufacturing, construction, bridge, machinery and steel structure manufacturing. It can cut carbon steel, stainless steel and various non-ferrous metals, and has a wide application range and large market capacity. CNC flame cutting machine, cutting carbon steel with large thickness, cutting cost is low, but there is large cutting deformation, cutting precision is not high, and cutting speed is low, cutting preheating time, long perforation time, difficult to adapt to full automation The need for operation. Its application is mainly limited to carbon steel, large thickness sheet cutting, and will be replaced by plasma cutting on medium and thin carbon steel sheet cutting.www.chamferingmachinechina.com