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Siemens SIMATIC S5-115U programmable controller to control, CRT display, the left and right of the machine tools, grinding head is driven by two-axis DC servo motor, machine tools capable of manual adjustment and automatic grinding cycle selection. , Italy the E9 Maerduosi measurement system is equipped with two measuring probe, a measuring wheel, the the wheel grinder loss amount of feedback to the control system, the wheel compensation; another measuring head measures the workpiece after grinding, and the measurement result is input control system by the servo motor the compensation feed, left, right wheelhead with VIOTTO grating for position measurement and control, to achieve a full closed-loop and automatic processing machine fed from the workpiece on completion of the grinding. Dry the HZ-050CNC CNC Spur rolling rail grinder, special grinder with the production of key industrial scientific and technological projects and the development of Shanghai Science and Technology. Both surface grinding another form grinding function, which uses the U.S. AB 8400MP CNC production system, the machine has seven CNC axes X, Y, Z three grinding feed axis and U, V, M three The wheel dresser shaft directly controlled by the system, another axis Q is a horizontal grinding wheel infeed (surface grinding) SLC programmable controller and IMC positioning module by the system I / O port input the 8400MP host, control its position, rest wheel or gap continuous grinding wheel dressing compensation feed automatically processing capacity. HZ-KD2010 six-axis CNC gantry double grinding head surface grinder, FANUC-OMC CNC system with four CNC axes control the horizontal and vertical feed of the two grinding head, grinding wheel peripheral grinding head with a PMC axis control rest of diamond pen feed, rotary indexing other PMC axis control universal grinding head, take full advantage of the system performance, reduce production costs, improve the machine's cost-effective.
In our previous work (Wu et al, 2004; Xu, 2010), has confirmed that the rotational movement of the workpiece ultrasonic crawler and peripheral speed and control the maximum speed of the bending vibration depends on the tracks end. However, through the inlet to the heart, polishing, not only the vicinity of the speed, but also through the the feedrate workpiece need to be precisely controlled in order to achieve high-precision grinding. To this end, the existing grinding device tangential feed and feed type centerless grinding machine (Wu Xu and Wu, 2011), 2005; modify add guide plate and tilt the ultrasonic small-angle track, and the workpiece motion control test. 3.1 Experimental setup(Sergeant Nagase, 315rpa on a CNC surface grinder table INTEGREX cooperation, LTD.), As shown by the experimental device installed modified feed type centerless grinding units established grinding. 2. AC power supply wave function generator (wf1944 NF) and two power amplifiers (NF group 4010) to generate two-phase AC voltage for PZT create elliptical vibration of the ultrasonic face crawler. Grinding operation procedures are as follows: First, the grinding unit constraints workpiece fixed on the table, its status and the right or carefully adjust the table to the left movement, so ˛ eccentric angle at a given value, and then, the stock market clear I by adjusting the gap between the grinding wheel and the worktable, the workpiece is located in the space between the guide plate is fed through feed centerless grinding operation; Finally, after the workpiece through the trimming area spark grinding process, the grinding wheel and the implementation of the ultrasonic crawler grinding wheel until it passes. 3.2 workpiece motion control test
In our previous work (Wu et al, 2005), it has been confirmed that the actual motion of the upper end surface in the ultrasonic crawler and is usually equal to the frictional force between the workpiece in an oval ultrasonic vibration generating synthetic bending vibration and the longitudinal vibration, the surface of the workpiece speed control Maximum the crawler bending vibration velocity VBmax (= 2 fab, wherein f is the frequency of the AC voltage is applied and AB is the end face of the track surface of the bending vibration amplitude). Accordingly, the circumferential speed of the workpiece and the feed rate VFA can be expressed as follows: