Main components of double disc grinding machine and their functions

Double disc grinding machine is a kind of high-precision and high-efficiency grinding equipment, which is widely used in bearings, automobiles, aerospace and other fields. Its core function is the simultaneous precision grinding of both end faces of a workpiece to ensure the parallelism, flatness and dimensional accuracy of the workpiece. In order to achieve this goal, the machine consists of several key components, each of which plays an indispensable role.

The bed is the basic component of a double disc grinder, supporting and connecting all other components. It needs to be extremely rigid and stable to withstand the huge cutting force and vibration generated during the grinding process to ensure machining accuracy. The bed is usually made of high-quality cast iron with internal reinforcement to improve its rigidity and vibration resistance. Some high-precision double disc grinding machines also use natural granite as the bed material for better thermal stability and vibration resistance. The grinding wheel spindle is used to install and drive the grinding wheel to rotate at high speed, which is one of the core components of the equipment. Its rotational accuracy and stability directly affect the quality of the machined surface. The grinding wheel spindle is usually supported by high-precision rolling bearings or hydrostatic bearings and driven by a motor through a belt or coupling. In order to meet the processing requirements of different workpieces, the speed of the grinding wheel spindle can usually be infinitely adjusted.

The workpiece spindle is used to mount and drive the workpiece to complete the grinding process in conjunction with the grinding wheel spindle. Its rotational accuracy and stability also have an important influence on the machining quality. The workpiece spindle is usually supported by high-precision rolling bearings and driven by a motor through a belt or coupling. Some high-precision double disc grinding machines also use hydrostatic bearings or magnetic levitation bearings to further improve the rotational accuracy and stability of the spindle. The feed system is used to control the feed movement of the grinding wheel or workpiece to achieve precise control of the grinding depth. Its feeding accuracy and stability directly affect the dimensional accuracy and surface quality of the workpiece. The feed system usually consists of servo motor, ball screw, linear guide and other components. The servo motor drives the ball screw to rotate and drive the grinding wheel holder or workpiece table to move along the linear guideway to achieve precise feed movement.

The dressing system is used to dress the grinding wheel, restore the shape accuracy and grinding performance of the grinding wheel, and ensure the dimensional accuracy and surface quality of the processed workpiece. The dressing system usually consists of diamond dressing pen, dressing pen holder, driving device and other components. The dressing pen, driven by the driving device, dresses the surface of the grinding wheel according to the set trajectory, removes blunted abrasive grains and restores the sharpness of the grinding wheel. The cooling system is used to cool and lubricate the grinding area, reduce the grinding temperature, reduce the thermal deformation of the workpiece, improve the machining accuracy and surface quality, and at the same time extend the service life of the grinding wheel. The cooling system usually consists of a coolant tank, cooling pump, pipes, nozzles and other components. The cooling pump pumps the coolant from the coolant tank and conveys it to the grinding area through the pipeline to cool and lubricate the grinding wheel and workpiece.

The control system is used to control the coordinated work of the components of the grinding machine to achieve automatic processing. Its control accuracy and stability directly affect the processing efficiency and processing quality. The control system usually consists of CNC system, servo drive, sensors and other components. The CNC system issues commands according to the machining programme, controls the servo drive to drive the axes, and the sensors detect the position and status of the axes in real time and feed the information back to the CNC system to form a closed-loop control. In addition to the above main components, double disc grinding machine may also be equipped with automatic loading and unloading devices, online measuring devices, safety guards and other auxiliary devices to achieve a higher degree of automation and processing efficiency. All in all, the various components of it cooperate with each other to complete high-precision and high-efficiency grinding processing. With the continuous development of technology, the performance of double disc grinding machine will continue to improve, and the application field will be more extensive.