Abrasive selection and use

The The choice of particle size

   Particle size is the size of the batch erosion of the particle size. Selection should take into account the processing of finish, grinding efficiency and abrasive wear three aspects. Super-hard abrasive particle size than ordinary abrasive grain size, in principle, to meet the requirements on the basis of finish, as much as possible selection of coarse grain size is appropriate to improve the efficiency of Canada. Resin combined with brightener to select 100/120 with fine particle size. Metal bonding agent to use 45 / 50-230 / 270 size is appropriate

The Selection of binders

   The material of the bonded abrasive is called a binder.

   The performance of the bonding agent has a great influence on the grinding performance of the superhard abrasive, which is the key to the selection of abrasive characteristics.

   Resin binder: the bonding strength is weak, but the grinding from the sharpness is good, not easy to plug, grinding high efficiency, with a certain polishing performance, grinding force small grinding temperature is low, easy to dress. It is mainly applicable to semi-fine grinding, grinding, grinding, polishing, carbide and other parts of the grinding.

   Metal bonding agent: combination of strong, good wear resistance, wear small, long life, can withstand greater load grinding, suitable for hard and brittle non-metallic materials, cutting, grinding, grinding, polishing and carbide Of the processing.

   Electroplating binder: has a strong binding force, generally used to create a variety of complex shapes, especially small, particularly thin abrasive and high precision abrasive and comes with tools. Such as: grinding head, assorted files, round slices and so on.

The Concentration selection

♦ Fine grinding of fine particles can choose a lower concentration

♦ Wide working surface width or molding is generally used

♦ coarse grinding with a higher concentration; fine grinding, semi-fine grinding with medium concentration; polishing and high finish grinding with low concentration

♦ Resin binder is generally used in 50% to 75%

♦ Metal binders typically use concentrations of 75% to 150%

♦ Cutting tools are generally used in concentrations of 25% to 100%

The The choice of coolant

   Superhard abrasive in the frosting process, should be used as much as possible coolant, so that not only can clean the abrasive, to prevent clogging, but also improve the work of the processing quality and finish, reduce abrasive consumption. Commonly used coolant are: kerosene, light oil, light diesel oil, oil and kerosene mixed oil, weak alkaline emulsion. Non-metallic materials are treated with water as a coolant.

The Abrasive dressing

   Superhard abrasive dressing, usually with ordinary abrasive grinding wheel or lime to complete. That is, anti-super abrasive with the flange on the grinder as a work to repair, or the super-choking on the grinding machine spindle with green silicon carbide grinding wheel grinding and finishing. Dressing at the same time using a large flow of cooling lubricants, in order to facilitate cleaning debris, the surface is not easy to burn, get a good face.