1.Principle of centerless grinding:
machines centerless grinding round of diamond wheel for grinding is a complex process, roundness of workpiece, first under the influence of its own original shapes, form errors of the original larger circle roundness error. When centerless grinding, the center of the workpiece and grinding wheel and wheel center line height for workpiece into the circle plays a vital influence.
First, the pallets shall be beveled at the top, above diamond grinding wheel and workpiece Center wheel Center even line. Diamond grinding wheels and guide wheels in a clockwise direction, driven by the wheel rotate in the opposite direction of the workpiece and grinding wheel contact. When grinding workpiece surface is rubbed off, continue to exists when the surface was smooth.
Not before grinding, surface of the workpiece is not round, on the outer diameterof a point, a small, exists when the big place gradually worn away, and concave gradually becomes shallow, workpieces being rounded. This is the principle of Centerlesscylindrical grinding round. Once grinding process complete, quality IT6~IT5,Ra0.8~0.2 μ m, and high efficiency. For the mass production of optical axis, PIN andsleeve, cylindrical surface workpiece ladders, shafts are not allowed to pass trough.
2. Centreless grinding of diamond grinding wheel with two methods
(1) run through law: workpiece between wheels and guide wheels, centerless grinding plate support below. Wheel axis horizontal, angle of wheel axis is tilted a little.Wheel circumference of the workpiece rotation speed can be reduced to driving force and makes workpiece axial feed force.
(2) cut into law: press wheel drives the workpiece rotation and diamond grinding wheels. Processing, the workpiece and guide wheels and grinding wheel infeed with pallets. Grinding after the wheel back, and remove the workpiece. Wheel axis and the axis of the wheel of parallel or intersect through a small angle, which makes workpiece sizes and stop faces (limitation of axial position of the workpiece) stuckon the line very well.