The machine tool transformation X is directly connected to the stepping motor and the longitudinal screw of the ordinary milling machine. When connecting, the center of the output shaft of the stepping motor coincides with the center of the longitudinal screw of the milling machine, and the pin end of the output shaft end of the stepping motor is used to ensure the accuracy of the transmission motion. The longitudinal end of the milling machine is connected by a key and the top wire is fixed, so that the original structure of the longitudinal screw of the milling machine can be not damaged, and the gap at the key joint should be as small as possible. The Y-direction stepping motor is coupled to the transverse screw of the milling machine through a transition gear. The Z-direction stepping motor is coupled to the input worm linkage, and the joints are pin-connected. After the NC transformation, the workpiece is clamped and positioned by the center of the disc table. Determination of Z-direction gear ratio In the numerical control transformation, the Z-direction stepping motor of the coupling disc table is matched with the screw pitch of the machine tool. Therefore, given the pitch of the matching screw, the Z-direction stepping motor must be rotated. Set the gear ratio of the disk table worm gear pair K=1:72, so the required displacement length L (mm) of the disk table rotation is: L=ti(1) where: t? Bar pitch (mm); i? disk table fixed number (i = 1 / k). It can be seen from the above that when the running path of the milling cutter of the machining cam is R=r1+r2=Rmax, the displacement accuracy of each step of the arc length displacement is equivalent to the pulse equivalent specified by the system, because the cam radius r1<R, and continues to decrease along the trend. The change, therefore, the smaller the part radius, the smaller the pulse equivalent, that is, the step-variable running arc length, so the control operation accuracy of the cam part trajectory is higher, and the processing quality is better. The cam profile error analysis is known from the gear ratio calculation formula Mz=2RM/ti. Since π is an irrational number, the K value is also an irrational number. The theoretical value of the arc length is not equal to the actual selected value, thereby making the arc length displacement length There is a transmission error ΔL. The transmission error ΔL is the same as the pulse equivalent change, and is also a change value, and is proportional to the cam radius, and reaches a maximum value at Rmax. Therefore, as long as the error at this point is calculated, it is within the allowable range of the part accuracy to meet the requirements. Conclusion This CNC transformation method expands its machining function and machining accuracy while retaining the original functions of the ordinary milling machine. In practical applications, good results have been received. When machining other size cam parts, recalculate the gear ratio and replace the Z1 and Z2 gears according to the maximum radius of the cam and the radius of the cutter. The NC transformation processing uses the polar coordinate system processing method to convert to the Cartesian coordinate system for program control. The actual machining proves that this CNC machining method improves the machining accuracy of the cam parts and makes the coordinate calculation and programming of the parts. (Compared to the calculation of the Cartesian coordinate system control method) is greatly reduced. (Finish) Solenoid Tube,Movable Core,Plunger Tube Assembly Brando Hardware Co., Ltd. , http://www.nbbrandohydraulic.com