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Factors Affecting Surface Roughness Of Grinding And Improvement Measures
Abrasives industry is a basic industry, but machining has always occupied an extremely important position. As far as abrasives are concerned, there are three aspects of improvement and breakthrough significance.
First, the physical structure of the [url=https://www.auroraabrasive.com/6-inches-aluminum-oxide-abrasive-metal-cutting-disc/]aluminum abrasive cutting disc[/url] is improved, such as increasing the number of abrasive grains per unit time, increasing the average length of the grinding, and increasing the grinding contact surface, which changes the amount of grinding per unit time and effectively improves the efficiency. ;
Second, the application of superhard abrasives mainly refers to the use of superhard materials such as metal powder, metal oxide or CBN as fillers, and the use of resin, ceramic or metal bond as abrasives. At present, the polishing sheet has been widely recognized for its high precision and high efficiency grinding effect by superhard abrasives.
Third, new abrasive tools have emerged, such as micron-sized polycrystalline ceramic microcrystalline abrasives, fine diamond abrasive spherical shell abrasives, and superfine polishing polyester film tapes. These new abrasives have the characteristics that make their grinding advantages even better.
Throughout the development of the grinding field, the future grinding process will put forward higher requirements for abrasives. Judging from the current situation, superhard products just meet these new grinding needs. For example, CBN abrasives have good thermal stability, high hardness and good wear resistance. Therefore, the grinding machine has high line speed, high grinding efficiency and high life of grinding tools. It is especially suitable for processing high speed steel and bearing steel. Black metal materials such as stainless steel and cold-excited cast iron.
In addition, it meets various needs of ceramic bond grinding wheels, high-speed grinding wheels for atmospheric holes, and different abrasive grinding wheels, polishing sheets, diamond saw blades, etc., which will be expanded with the advancement of technology and become the mainstream products for grinding.
1 Grinding conditions
1) Increase the speed of the grinding wheel or reduce the speed of the workpiece
2) using a small longitudinal feed
3) Correct use of cutting fluid type, ratio, pressure, flow and cleanliness
4) Improve the balance accuracy of the grinding wheel, the rotation precision of the grinding machine spindle, the smoothness of the movement of the table and the rigidity of the whole process system, and reduce the vibration during grinding, which can greatly improve the surface roughness.
2 grinding wheel characteristics and trimming
1) The finer the grain size of the grinding wheel, the smaller the roughness value
2) The abrasive should be selected to have affinity with the workpiece material (refer to the grinding wheel selection for details)
3) The hardness of the abrasive tool, when the workpiece material is soft and sticky, a harder abrasive tool should be used; when it is hard or brittle, a softer abrasive tool should be selected.
4) Using a grinding wheel with a larger diameter of the grinding wheel, increasing the width of the [url=https://www.auroraabrasive.com/6-inches-aluminum-oxide-abrasive-metal-cutting-disc/]customized metal cutting disc[/url] can reduce the surface roughness
5) Using a diamond pen with good wear resistance, suitable cutting edge shape and installation angle, when the dressing amount is appropriate (the longitudinal feed amount should be smaller), the abrasive cutting edge can obtain good contour and reduce the surface. Roughness.
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