Introduction to roll grinder
The roll grinder is a metal cutting machine tool. It consists of a bed body, a headstock, a tailstock, a bracket, a vertical and horizontal resistance plate, a grinding head, a measuring frame, and an electrical numerical control system. It is divided into bearing systems and transmission systems. system, grinding system, measurement information system and control management system. The workpiece is supported by the headstock, tailstock and bracket, and rotated by the headstock drive. The grinding of roller metal is realized based on the mathematical model of the machine tool. The online measurement information system can feed back the measurement data to the grinder control management system in real time, and the control environment system performs closed-loop control of the machine tool, thereby completing precision machining of the workpiece.
The roll grinder adopts a structure in which the grinding wheel bed and the workpiece bed are separated. The bed structure adjustment pad spacing is short and the rigidity is strong, so the bed accuracy problem is not easy to change. The grinding wheel base has a wide bed, the guide rail spacing is 1200mm, and is equipped with a retractable stainless steel protective cover to ensure that it does not rust. A precision ball screw is installed in the grinding wheel base to drive a large trolley (Z-axis).
The headstock of the roll grinder adopts a three-stage triangle belt transmission to ensure the stability and accuracy of the transmission; the AC spindle motor drives the headstock to achieve forward and reverse rotation; the position control function of the headstock realizes the automatic positioning of the dial angle; it facilitates the lifting and lowering of the roller. Reduce auxiliary time. The headstock lubrication management system can use a grease pump to realize automatic and timed oil supply.
The tail of the roll grinder is driven by electricity and automatically locked by hydraulic pressure. The tailstock is equipped with a large-stroke (1000mm) hydraulic working sleeve.
The front and rear diameter and rear bearings of the grinding wheel spindle of the roll grinder all use such a high-precision dynamic and static pressure bearing. The spindle axial direction can also use some thrust bearings that require high precision. In addition, in the design of the rear bearing structure, the static management pressure control effect of the dynamic and static pressure bearings in the enterprise's working chamber is enhanced, and the damage to the bearing shell caused by the large belt tension is overcome. The product development of spindle dynamic and static pressure bearing companies has the characteristics of high non-rotational precision, good stability, strong dynamic management ability and rigidity, and is not easy to cause vibration.
The grinding frame of the roll grinder adopts a single-layer overall structure with high rigidity. The grinding frame guide rail is a plastic hydrostatic guide rail. The mill feeding mechanism is composed of a Siemens AC servo motor with a reduction device and a precision pre-stretched precision ball rod, which has high feeding accuracy and sensitivity.
The slide of the roll grinder adopts V-shaped flat plate-type plastic hydrostatic guide rail. The slide feed mechanism is composed of a Siemens AC servo motor with a reducer and a pair of precision ball screws with precision pre-stretching. The closed-loop position control of the trolley is realized by the CNC system through the AC servo motor and circular grating. Compared with the traditional rack and pinion transmission used by similar grinding machines at home and abroad, this slide adopts ball screw transmission, with a short mechanical transmission chain, smooth movement, high transmission accuracy and small clearance.
All servo system motors of the roll grinder adopt Siemens full digital economic communication and servo drive motors, which have high precision and high reliability.