Along with the development of science and technology, computer aided design in mechanical application of modern CAD/CAM, FMS, CIMS are in the numerical control technology is widely applied. Numerical control machine tool since 1952 in the United States since the success of the development research has gone through the five stages of development. With microelectronics and computer technology matures, promote the development of numerical control technology in China, home-made numerical control system has successively developed success, and to make our country nc machine tools on quality and performance has been protected. Due to the numerical control machine tool has modified strong adaptability, high machining accuracy, increase productivity and other characteristics, so in all the areas to be used widely.
Numerical control technology in sheet metal has been widely applied in machine tool, it solved the existing in the metal parts high precision, large complex shape, batch. Numerical control machine tools including sheet metal cutting machine, numerical control CNC laser cutting machine, CNC punching machine, CNC bending, welding machine, flame cutting machine, etc. Their applications in production has greatly increased the sheet metal processing
ability, make sheet metal parts in quality, yield of assured and also greatly reduce the labor intensity of the workers.
Shear material in sheet metal processing
process is the first procedure, the accuracy of the material directly influence the process quality behind working procedure, CNC cutting machine application ensures the size of the material and the material of the diagonal nominal. CNC cutting machine is by the numerical control equipment, servo system, measuring device and of machine tools. Servo system is a three part servo motor and servo drive device component. Before the machine has two positioning servo motor, usually a main motor to work alone, processing range is 2-500 mm, such as processing hypotenuse is vice motor, numerical control systems are two different instruction form tapered side plain wheels. There is a position after servo motor, main processing big board face products, processing range 150 ~ 4000 mm. As mentioned in the seafood QC12K series CNC cutting machine equipped with Swiss CYBELEC DNC60 series can be stored 36 order, internal memory of 100 a sequence.
S stamping is a important in sheet metal processing
link, nc punch can replace the past three sets of punch processing ability. Greatly improving the productivity. Nc punch is a kind of extensive use of machine tool, a single punch and to tower two kinds. This paper CNC1000 type as an example, this machine origin Italy. C structure of the machine tool belongs to, processing range: 1270 X 1000 mm, to tower has 19 mould location, consists of two parts are installed the mould of the punch and concave die, concave die size external diameter of 25.4 mm and 47.62 mm and 88.9 mm and 125.43 mm and 158.4 mm and 210.00 mm, nc punch usually have X, Y, Z three axis. X axis is machine 0 degrees direction, the Y axis machine tools is 90 degrees of direction, the Z axis installed in turn tower is the Angle control mold device.
Machine operator according to the detail drawing and process required processing plan write the program list. The operator of the machine tool through operation panel, in EDIT mode will program directly write programs in memory; With CAD/CAM and the development of art CIMS machine, the operator can through the computer related software will graph input to the computer generated within the program, kao into the disk through the disk drive input numerical control system. Still can use computer numerical control system and the method of serial input. CNC punching programming instructions into G code M code, G code is used for instruction machine tool and interpolation processing movement way function. If G91 incremental command, G90 absolute command, G29 arc punching and G68 step blunt the arc. M code is instruction to do some of the auxiliary motion machine code. Types such as program to stop. Inspection procedures correctly, and loosen the calipers in the closed calipers. Starting the oil pump and punch the execution procedures complete the processing.