What is a grinder?


The grinder is a machine tool that uses abrasive tools […]

The grinder is a machine tool that uses abrasive tools to grind the surface of the workpiece. Most of the grinders use high-speed rotating grinding wheels for grinding processing, a few use other abrasive tools such as oilstone, belts and free abrasives for processing, such as honing machines, super-finishing machine tools, belt grinders, grinders and polishing Machine waiting. The grinder can process materials with higher hardness, such as hardened steel, cemented carbide, etc.; it can also process brittle materials, such as glass and granite. The grinder can perform high-precision and small surface roughness grinding, and can also perform high-efficiency grinding, such as powerful grinding.

Grinding machines have the most variety among all types of metal cutting machine tools. The main types are cylindrical grinders, internal grinders, surface grinders, centerless grinders, tool grinders, etc.

Cylindrical grinders are the most widely used, capable of processing various cylindrical and conical outer surfaces and end faces of shaft shoulders. The universal cylindrical grinder is also equipped with internal grinding accessories, which can grind the inner hole and the inner and outer cones with a large taper. However, the degree of automation of the cylindrical grinder is relatively low, and it is only suitable for small and medium batch production and repair work.

The grinding wheel spindle of the internal grinder has a high speed, which can grind the surface of cylindrical and conical inner holes. Ordinary internal grinders are only suitable for single piece and small batch production. Automatic and semi-automatic internal grinders, in addition to the automatic working cycle, can also automatically measure during processing, and are mostly used in mass production.

The workpiece of the surface grinder is generally clamped on the worktable, or fixed on the electromagnetic worktable by electromagnetic suction, and then the periphery or end of the grinding wheel is used to grind the surface of the workpiece; the centerless grinder usually refers to the centerless cylindrical grinder, that is, the workpiece is not used The center or the chuck is centered and supported, and the outer surface of the workpiece to be ground is used as the positioning surface. The workpiece is located between the grinding wheel and the guide wheel and is supported by the pallet. This kind of grinding machine has high production efficiency, is easy to realize automation, and is versatile. In mass production.

Tool grinders are grinders specially used for tool manufacturing and tool sharpening. There are universal tool grinders, drill sharpening machines, broach sharpening grinders, tool curve grinders, etc. They are mostly used in the tool workshops of tool manufacturers and machinery manufacturers.

The abrasive belt grinder uses a fast-moving abrasive belt as the abrasive tool. The workpiece is supported by the conveyor belt. The efficiency is several times higher than other grinders, and the power consumption is only a fraction of other grinders. It is mainly used for processing large-size plates and heat Difficult to process materials and mass-produced flat parts, etc.

Specialized grinding machines are grinding machines that specialize in grinding certain types of parts, such as crankshafts, camshafts, spline shafts, guide rails, blades, bearing raceways, gears and threads. In addition to the above categories, there are also honing machines, grinders, coordinate grinders and billet grinders.