Working principle of grinder
The grinding machine is controlled by stepless speed regulation system, and the grinding speed suitable for grinding various parts can be easily adjusted. Closed loop feedback with electro pneumatic proportional valve
Pressure control, pressure device can be adjusted independently. The upper wall is equipped with slow down function to effectively prevent the breakage of thin and brittle workpieces. Through a time relay and a grinding counter, the grinding time and the number of laps can be accurately set and controlled according to the processing requirements. When working, the pressure mode can be adjusted. When the grinding time or lap speed is reached, the machine will stop automatically and give an alarm to realize semi-automatic operation.
There are three stages in the grinding process, i.e. the starting stage, the formal stage and the ending stage. In the beginning stage, the grinding tool rotates at a constant speed, and at the end stage, the grinding tool rotates at a constant speed. The grinding machine is characterized in that, in the beginning stage of the grinding process, the acceleration of the speed of the grinding tool is artificially controlled to increase from zero to fast from slow to fast, and when the speed of the grinding tool rises to the formal level When the grinding speed is half of the grinding speed, there is an inflection point in the change of acceleration. The acceleration of controlling the grinding speed decreases from fast to slow from the maximum value until the grinding speed reaches the formal grinding speed, and the acceleration of the grinding tool speed drops to zero.
Based on the characteristics of fixed abrasive grinding, the abrasive density distribution on the grinding tool is designed reasonably according to the relative motion track density distribution between the workpiece abrasives, so that the wear of the abrasive tool in the grinding process does not affect the surface precision of the grinding tool, so as to significantly improve the surface precision of the workpiece and avoid the trouble of dressing the grinding tool. In plane fixed abrasive grinding, the rotation motion of the grinding tool is the main motion, and the motion of the workpiece is the auxiliary motion. In most cases, the workpiece is floating on the grinding tool, and its motion law is unknown. Therefore, it is necessary to analyze the force acting on the workpiece in order to find out its stress state and motion law. Taking the workpiece as the separation body of the whole grinding system, the differential equation of the force balance of the workpiece is established, and the motion law of the workpiece can be obtained by solving the equation.
The main machine of the grinder is driven by a speed regulating motor and equipped with a high-power deceleration system, which can start and stop soft and run smoothly. Through the upper and lower grinding plates
The grinding motion of sun wheel and star wheel is coordinated with each other in four directions and speeds during machining, so as to achieve the efficient operation of simultaneous grinding of upper and lower surfaces. The lower grinding plate can be lifted and lowered to facilitate the loading and unloading of workpieces. Pneumatic sun wheel direction changing device can precisely control the grinding accuracy and speed of both sides of the workpiece. A correction wheel is provided to correct the parallel error of the upper and lower plates.
The basket lapping machine inherits the characteristics that the two processes of the basket grinder are realized in one machine and one process. At the same time, it can also be used as a separate disperser (when the dispersion plate is in the working position and the grinding basket is not lowered). For the materials to be ground, the function of first dispersing and then grinding can be realized (when the grinding basket drops to the working position, the material can be grinded with high efficiency).