ultra-high speed grinding uhsg can run at speeds higher than 40,000 fpm 200 m/s , taking 41 s to remove 1 in 3 16 cm 3 of material, but is still in the r&d stage. it also requires high spindle power and high spindle speeds.
the machine operates by a high speed air spindle rotating a grinding bit. the air spindles are removable and interchangeable to achieve varying surface speeds. some spindles are fixed speed 60000 rpm , others are adjustable 30000-50000 rpm , and still others are very high speed 175000 rpm .
grinding is used to finish workpieces that must show high surface quality e.g., low surface roughness and high accuracy of shape and dimension. as the accuracy in dimensions in grinding is of the order of 0.000025 mm, in most applications it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50 mm depth.
the factor can be as high as 10:1 or 10 to 1, if the equipment has poses a risk to a person's life. working load limit wll is the maximum working load designed by the manufacturer. this load represents a force that is much less than that required to make the lifting
the cbn high-speed grinding machine combines two stations additional machining options under one hood. business areas. the junker group operates in the following business areas: machines, services, technology and equipment. grinding machines for high-precision metalworking represent the largest proportion of sales.
the simple design means that it can be operated at a higher temperature than other mills, giving it high drying capacity. however, the grinding action is poor, and the product is often re-ground in a ball mill. notes and references