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Grinding Machine

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Construction Equipment

A grinding machine is a power-driven tool that uses a rotating grinding wheel to alter the shape and dimensions of a solid work piece.[1] The wheel is commonly made from silicon, carbide or aluminum oxide.[2] The tool is often used with a metallic workpiece when producing fine finishes or small cuts to the work piece. There are many different types of grinding machines providing a combination of different wheel feeds for specific results.[3]

Contents

[edit] How it works

The machine works by removing any unwanted layers of a metal from a work piece by using the rotating abrasive wheel.

When grinding a cylindrical form, the workpiece rotates as it is fed against the grinding wheel. When grinding an internal surface, the workpiece is gripped in a rotating chuck while a small wheel moves inside the hollow of the piece. For a surface grinder, the workpiece is put on a flat surface as it moves under the rotating abrasive wheel.

Since material from the workpiece is removed through abrasion, this tool generates a substantial amount of heat. For this reason, the operator must incorporate a coolant to cool the workpiece in order to avoid overheating.[4]

[edit] Types

[edit] Surface grinder

A surface grinder has a “head” that is lowered while the workpiece is moved under the grinding wheel on a table. The surface grinder can be operated either manually or under CNC control (computer controlled).[5]

[edit] Cylindrical grinder

The cylindrical grinder contains multiple grinding wheels that the workpiece is rotated and fed past in order to form a cylinder. This type of grind is used to make precision rods.[6]

[edit] Belt-grinder

A belt-grinder processes metals and other materials using coated abrasives as an aid. The belt-grinder is a all-round machine, suitable for various kinds of applications, such as finishing, deburring, and stock removal.[7]

[edit] Bench grinder

The bench grinder is secured to a workbench and usually contains two wheels of different grain sizes for roughing and finishing operations. This machine shapes various tools that need to be manufactured or repaired. Bench grinders are manually operated.[8]

[edit] Jig grinder

A jig grinder is used to finish jigs, dies, and fixtures. Primarily used for grinding holes and pins. The Jig grinder can also be used when working with complex surface grinding when finishing work started on a mill.[9]

[edit] Common Manufactures

[edit] References

  1. Grinding Machine. Encyclopædia Britannica, Inc., 2010-04-08.
  2. Grinding Machine. New World Encyclopaedia, 2010-04-08.
  3. Machine Tools - Grinding Machines. 2010-04-08.
  4. Grinding Machine. Encyclopædia Britannica, Inc., 2010-04-08.
  5. Grinding Machine. Encyclopædia Britannica, Inc., 2010-04-08.
  6. Grinding Machine. Encyclopædia Britannica, Inc., 2010-04-08.
  7. Grinding Machine. New World Encyclopaedia, 2010-04-08.
  8. Grinding Machine. New World Encyclopaedia, 2010-04-08.
  9. Grinding Machine. New World Encyclopaedia, 2010-04-08.