Grinding on IndustryNet

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When a machine, as a cutting tool uses a grinder for the abrasive process, it is called grinding.

Many machines can be used for grinding, such as:

Grindstones – Used for hand-cranked knife sharpening process

Power tools - Die grinders and angle grinders  

Many types of industrial machine tools 

Bench grinders – Usually used in workshops

Grinding represents a process in tool making and plenty of areas in manufacturing. It delivers very accurate dimensions as well as fine finishes, and when it comes to mass production,it can remove the rough layers of metal quite quick. Grinding is a process that is better suited for the handling of very hard materials.

Because grinding is a process that involves metal-cutting, it is actually an area of the cutting process. When singled out, every grain of the abrasive function, shears a tiny chip that is basically a "cut".But, people who work in the machining fields, use the term cutting, for the classical cutting process, and grinding is usually categorized as a "separate" process. Sanding and lapping are similar abrasive cutting processes.

Surface grinding 

In order to create a flat surface, a rotating abrasive wheel is used for the removal of material.The surface grinder has 3 main parts: abrasive wheel, Chuck, a work holding device with vacuum or electromagnetic holder, and a reciprocating table.

The workpiece materials usually used in this grinding process include steel and cast iron. These two materials are known for not clogging the grinding wheel in the process,while other materials, such as stainless steel, aluminum, brass and plastics, tend to clog the grinding wheel.

Cylindrical grinding

This type of grinding is used for grinding of cylindrical surfaces as well as for the shoulders of the workpiece. The part that needs to be ground, is mounted on centers and is rotated by the center driver.The abrasive wheel and the processed part are rotated at different speeds as well as on different motors. There are 5 types of this kind of grinding:the outside diameter, the inside diameter, plunge, creep feed, and centerless grinding.

A typical cylindrical grinder consists of grinding wheel, two workpiece holding centers, chuck, and the grinding dog. Usually, the cylindrical grinding machines are made with a swivel, in order to form tapered pieces.When compared to each other, the workpiece and the wheel are moving parallel in both the longitudinal and radial directions. The grinding wheel comes many shapes.The most used ones are the disk-shaped wheels, and they are usually used for creating a straight or tapered workpiece, while, on the other hand, formed wheels are usually used when the production of a shaped workpiece is needed.

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