High speed grinding technology

High speed grinding to achieve two goals of modern manufacturing technology to improve product quality labor efficiency. Practice proves: if the grinding speed increased from 35 m/s to 50 ~ 60 m/s, the general production efficiency can be increased by 30% ~ 60%, and the grinding wheel durability increased about 0. 7 ~ 1 times the workpiece surface roughness parameter value reduced by about 50%. General grinding speed reaches more than 45 m/s is called high speed grinding. Domestic in my eighty s developed ZYS - 811 automatic bearing internal grinder, take the lead in domestic bearing industry ferrule grinding processing and application of high speed grinding technology, successfully developed a high rigidity, high speed, high power electric spindle and high speed grinding wheel. And the high speed grinding is already widely used both at home and abroad, and along with the widespread adoption of high grinding ratio, high durability superhard abrasive such as CBN, the grinding wheel grinding speed reached 80 ~ 120 m/s, is even higher. Mikrosa such as: Germany, Japan KOYO company centerless grinder, Japan TOYO company bearing internal grinder, surface grinding wheel linear velocity of 120 m/s, the inner surface grinding linear speed of 60 m/s ~ 80 m/s. Increase the grinding wheel drive ( Transmission) Improving machine tool of rigid system power, an important measure to realize high speed grinding, high-speed grinding machine and the high speed spindle unit is the most key components. High speed grinding, grinding wheel in addition to should have sufficient strength, also need to ensure good grinding performance, high grinding effect can be attained. And the cooling device is to realize high speed grinding device is one of the indispensable. Outside surface grinding wheel automatic dynamic balancing technology for surface grinding, and because of its high grinding wheel for heterogeneous organization body, centre of gravity is always deviate from the shaft, wheel system inevitably caused when the high-speed rotating wheel system and the whole machine tool vibration, directly affects the service life of the machine tool. This case, grinding will be difficult to achieve high precision, easy to cause the workpiece surface grinding marks, corrugated degree increased. Machine tool grinding wheel on the installed directly on the machine or other way automatic dynamic balancing device, fast directly after boot near the equilibrium position, automatic balance more complete and can also be omitted grinding wheel static balance. The technological breakthrough to promote the development of grinding technology and at the same time can greatly limit extend the service life of diamond grinding wheel, trimmed with and spindle bearings, reducing machine tool vibration, keep the original precision machine tool for a long time. Quickly remove all empty technology bearing inner surface grinding mill processing equipment, surface grinding machine level is symbolic. The main grinding aperture limit the size of grinding wheel and the corresponding institutions set parameters, fundamentally limits the process system rigidity, its machining precision to demand higher at the same time. These require us must be in-depth study into the internal surface of the grinding process, in addition to play to the greatest limit of machine tool and grinding wheel cutting ability, reduce the secondary grinding time improve grinding efficiency key, because grinding idle around 10% of the total grinding time.