【正文】 ns after testing, the process card ( to sign the name ) together to the next process, by the next process validation. drum process drum operation Pressure drum process and stamping processes are the same steps in the process, stamping process range of φ 159 φ1900mm and pressure drum process is in the range of φ 1600 φ4800mm. And stamping is different pressure drum mostly the head generally forming, eventually forming is pleted by spinning, stamping without the special requirements of customers, eventually forming step is not required. φ 1600 φ1900mm heads the two processes is needed. drum machine. (1) the main cylinder is provided with an upper die head is pressed drum execution as long as part of. (2) supporting seat fixed lower die and upper die head center in a straight line. (3) supporting frame1is provided with a rolling wheel, a position adjusting before and after. (4) supporting frame is provided with a rolling wheel rotating disk II. In addition, there are hydraulic system, the motor, oil pump, oil tank, and a control console. drum machine operation steps (1) first of all to undertake a blanking process card, find a good wafer. (2) the control process card on the technological requirements, put on a set of corresponding die, and with the use of gauges to determine the selected die size and to suppress the wafer size. (3) and stamping machine is different from the original film is not pressure drum center began to suppress, but from the wafer edge, as long as the die and wafer alignment on the line. (4) the pressing process is continuously by controlling the rotation wheel is driven by the rotation of a wafer rotating, according to a certain order to suppress. (5) in after the pressing process, prepared template matching. If a deviation to make further adjustments. drum operation standard 7 (1) die on the quality of the products and the smooth pressure drum forming crucial. Therefore, require that the operator must according to the processing situation of choice for mold and timely adjust shim plate. (2) the operator receives the process card, see process card, according to the process card check objects, to confirm the real instruction, onepiece, material. Number, batch number etc.. According to the choice of mold process card. (3) for EHA, EHB head shapes have adopted the *D standard selection, for DHB, PSH, MD and other special products according to technology card selection of mold, but in principle according to P**[1] (4) pressing carefully before inspection wafer quality, no seam wafer end is smooth, there is no gap, surface has no cutting slag and defects. (5) a weld in addition to carefully check the end of the wafer wafer defects, at the same time should be checked for weld seam is higher than that of base metal, weld ends of are welding spatter, weld end grinding smooth, there is no crack notch. (6) two or two or more superimposed when pressed, each slice of the joint surface should be clean, according to the circumstances must entrust welding class, the wafer is welded together to suppress. (7) detection of wafer thickness ( the thickest, most thin, whether and process card, measurement of wafer size and process card. (8) suppression must be removed before the inside and outside surface of all debris, to prevent pitting appeared. (9) for general stainless steel materials ( more than 5mm plate ) using Teflon plate mold and the lower mold dressing on surface polished smooth ( necessary nowadays mold to Teflon plate. ) to ensure the surface quality of the workpiece, while in the process of the pressing need to avoid debris into molds and semifinished products. [6] (10) the pressing process, when the wafer is a R shape, must use the corresponding R model measurement, the pressing process should be considered to adjust the pressure deformation degree. (11) pressing is finished, the measurement of plate thickness, measuring arc length. Check surface quality, check end and weld end is smooth ( necessary to polish out the ceremony ). (12) to check the semifinished product with process card is on the move to the next process ( and sign the name ) by the next process to confirm acceptance before. process 8 operation The spinning process is pressed after the drum head molding process, mainly for large head R and straight edge formation. machine. (1) forming wheel is connected to the corresponding mold, forming in the head inside, mold top with half formed head R and straight edge is tangent to tangent. (2) supporting wheel is also connected and molded wheel mold, forming in the head outside, and a forming wheel tangent. (3) base for fixing head, and the bottom according to head size before and a fter moving, the head should be installed so that the center of the base and the head of the center in a straight line. (4) the center rod is used for fixing head, and the center and the center of the base is in a straight line. In addition to the motor, a circuit board, is connected to the shaft, and a control console. procedure (1) to undertake pressure drum process card, according to the card to determine the corresponding head spinning. (2) according to the head of the diameter, select the corresponding upper and lower mold. (3) the clamping head, ensure that the head of the center point and the center of the base point in a straight line. (4) to adjust the molding wheel and the head of tangent, then according to the forming wheel position adjustment roller. (5) in the spinning process to observe the forming roller and the supporting roller relative position, and continue to use the template on the line alignment. Until the R reaches the requirements. operation standard (1) spinning wheel material for steel bearings or ductile iron, mold on the quality of the products and c