New system for tilting parts

Digital Control Servo System Design [25] The control system mainly includes the following components: a detection device that detects the position and speed of the tool and the workpiece. The pulse encoder and the inductive synchronizer can be used to detect the rotary motion and the linear motion respectively; the signal processing and control module realizes the processing of the command signal to drive the servo motor to complete the required motion of the tool spindle and the workpiece spindle. The module includes genlock control and electronic differential synthesis. Motion execution module, ie servo motor.
Synchronous phase-locked control The principle of genlock control is shown in the figure. The tool spindle pulse encoder generates a pulse sequence with the movement of the spindle. The frequency of the pulse sequence is proportional to the rotational speed, and the number of pulses is proportional to the rotation angle of the main shaft. The pulse train enters the reversible counter plus the m1 multiplication frequency multiplier in the frequency multiplier, and the output of the workpiece spindle servo motor pulse encoder is multiplied by m2 times of another frequency multiplier to enter the decrement of the reversible counter. The obtained deviation signal is amplified and outputted by D/A conversion, and amplified by the drive circuit, thereby controlling the motion of the workpiece spindle servo motor.
In the same way, the synchronous tracking of the tool spindle and its up and down reciprocating motion, that is, the fixed ratio of the additional rotation to the linear displacement can also be guaranteed by the same control system.
Electronic differential synthesis The system uses a pulse signal synthesis method to perform a function similar to a mechanical differential chain, the so-called electronic differential synthesis. The tool spindle command pulse fb and the additional rotation pulse vfb are out of phase by the out-of-phase circuit, and then enter the synthesizing circuit to add and subtract by the pulse number. Since the unevenness of the pulse directly affects the motion smoothness of the servo motor, and even causes a lost step, uniform interpolation is realized by frequency smoothing.
Automatic parameter programming Although there are many types of workpiece gears and shaper cutters, the contour curves are also very complicated, but they are often described on the part drawings with some characteristic parameters, such as the gear number, modulus, helix angle, etc. of the gear or tool. The selection and adjustment of cutting parameters (such as tool spindle speed, knife depth, feed rate, etc.) before the gear shaping is also based on these characteristic parameters combined with the inherent parameters of the machine tool through analytical calculations. Therefore, the system is easy to implement automatic parameter programming. By means of the parameter automatic programming software, only the characteristic parameters representing the workpiece gear and the shaper cutter can be input during operation, and the NC machining program can be automatically output through software processing.

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