Surface Grinding Machine
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Surface Grinding Machine is a machine in which a grinding wheel is used as a cutting tool for eliminating the material from the surface of the workpiece. It is also called an abrasive machining process where abrasives are placed on the surface and corners of the grinding wheel so as to do the finishing method with much extra accuracy
A surface grinder is a machine instrument recycled to provide precision ground surfaces, either to a critical size or for the surface finish.The typical precision of a surface grinder depends on the brand as well as usage, however ±0.002 mm (±0.0001 in) should be possible on most surface grinders.
The device consists of a table that traverses equally longitudinally and across the face of the wheel. The longitudinal feed is usually powered by hydraulics, as may the cross feed, however some mixture of hand, electrical or hydraulic may be used depending on the ultimate usage of the machine (i.e., production, workshop, cost). The grinding wheel rotates in the spindle head and is also changeable for height, by any of the methods described previously. Modern surface grinders are semi-automated, depth of cut and spark-out may be preset as to the number of passes and, once set up, the machining process requires very little operator intervention.
Dependent on the workpiece material, the work is generally held by the use of a magnetic chuck. This may be either an electromagnetic chuck, or a manually operated, lasting magnet type chuck; both types are shown in the first image.The machine has provision for the application of coolant as well as the removal of metal dust (metal and grinding particles).Types of surface grinders Machine:
The periphery (flat edge) of the wheel is in interaction with the workpiece, producing the flat surface. Peripheral grinding is used in high-precision effort on simple flat surfaces; tapers or angled surfaces; slots; flat surfaces next to shoulders; recessed surfaces; and profiles.
The face of a wheel (cup, cylinder, disc, or segmental wheel) is used on the flat surface. Wheel-face grinding is often used for fast material elimination, but some machines can accomplish high-precision work. The workpiece is held on a reciprocating table, which can be various according to the task, or a rotary-table machine, with continuous or indexed rotation. Indexing allows loading or unloading one station while grinding operations are being performed on a different. An alternative term is snow grinding.
Disc grinding is parallel to surface grinding, but with a larger contact area between disc and workpiece. Disc grinders are available in both vertical and horizontal spindle categories. Double disc grinders work both sides of a workpiece simultaneously. Disc grinders are capable of achieving especially fine tolerances.