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the function of grinding machine

the function of grinding machine

What Is Grinding Machine Definition, and Types ...

A grinding machine, often shortened to grinder, is one of the power tools or machine tools used for grinding, it is a type of machining using an abrasive wheel as thecutting tool. Each grain of abrasive on the wheels surface cuts a small chip from the workpiece via shear deformation. Grinding is used to finish workpieces that must show high surface quality and high accuracy of shape and dimension. As the accuracy in dimensions in grinding is of the order of 0.000025 mm, in most applications, it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50 mm depth. However, there are some roughing applications in which grinding removes high volumes of metal quite rapidly. Thus, grinding is a diverse field.

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The grinding machine consists of a bed with a fixture to guide and hold the workpiece, and a power driven grinding wheel spinning at the required speed. The speed is determined by the wheels diameter and the manufacturers rating. The grinding head can travel across a fixed workpiece, or the workpiece can be moved while the grinding head stays in a fixed position. Fine control of the grinding head or table position is possible using a vernier calibrated hand wheel or using the features of numerical controls. Grinding machines remove material from the workpiece by abrasion, which can generate substantial amounts of heat. To cool the workpiece so that it does not overheat and go outside its tolerance, grinding machines incorporate a coolant. The coolant also benefits the machinist as the heat generated may cause burns. In high precision grinding machines , the final grinding stages are usually set up so that they remove about 200 nm . Belt grinding is a versatile process suitable for all kind of applications, including finishing, deburring, and stock removal. 2. Bench grinder, which usually has two wheels of different grain sizes for roughing and finishing operations and is secured to a workbench or floor stand. Its uses include shaping tool bits or various tools that need to be made or repaired. Bench grinders are manually operated. 3. Cylindrical Grinders:A cylindrical grinder is used for shaping the outside of a workpiece. These machines accept workpieces in a variety of shapes as long as they can be rotated through a central axis. In a cylindrical grinder, both the workpiece and grinding wheel are simultaneously rotated. Outside diameter grinders, internal diameter...

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