Type of polishing wheel
The hardness of the polishing wheel is determined by the distance of the suture, and the smaller the suture distance, the higher the hardness of the polishing wheel. In order to make the polishing wheel softer, the polishing wheel should be made with a sufficient distance between the sewing thread and the wheel edge (also not stitched). Polishing large workpieces also uses a polishing wheel with a special air-cooling device.
The polishing wheel is manufactured in the following ways:
(1) Non-stitched cloth wheel. It is made of soft cotton cloth, which is suitable for polishing complex shapes or for fine polishing of small workpieces.
(2) Stitching. It is made of coarse cloth, non-woven fabric and fine flat cloth. The stitching can be in the form of concentric spiral and direct radiation. It is better to polish various coatings and simple shapes.
(3) Air-cooled cloth wheel. It adopts a 45-degree angle cutting method and has a ring-shaped pleated shape with a metal disc in the middle. It has the characteristics of ventilation and heat dissipation, and it is suitable to polish large workpieces.
(4) Felt wheel. Made of pure wool, the shrinking time is long, the structure is tight, the pores are small, and it is not limited by the warp and weft as the fabric, and the wear resistance is good.
According to the main materials, there are the following types:
(1) Abrasive cloth wheel. Made of sandpaper of various abrasive grades, different abrasives (such as corundum, silicon carbide). It has a high cutting rate and is suitable for grinding, polishing, burring and finishing of various types of materials.
(2) Cotton polishing wheel. Made from different types of cotton. Use different impregnation methods and different abrasives for semi-polishing, polishing and mirror polishing.
(3) Hemp and cotton mixed polishing wheel. It is usually immersed in burlap or cotton lining, and can be initially polished and polished by means of various abrasives.
(4) Synthetic material - non-woven polishing wheel. Synthetic materials are mostly made of nylon yarn, binder, and abrasive, and are used as raw materials to make polishing wheels of various shapes. Because they contain abrasives, they are generally used without polishing.
(5) Special material polishing wheel. Special application processing.