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A method of grinding external cylindrical surfaces, in which the work is supported among a regulating wheel, grinding wheel, and a work rest blade, is known as

A method of grinding external cylindrical surfaces, in which the work is supported among a regulating wheel, grinding wheel, and a work rest blade, is known as Correct Answer Centreless grinding

Explanation:

  • Grinding is a metal cutting operation performed by means of a rotating abrasive tool, called “grinding wheel”.
  • Grinding is the most common form of abrasive machining.
  • It is a material cutting process that engages an abrasive tool whose cutting elements are grains of abrasive material known as grit.
  • These grits are characterized by sharp cutting points, high hot hardness, chemical stability, and wear resistance.
  • The grits are held together by a suitable bonding material to give the shape of an abrasive tool.

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In accordance with the type of surface to be ground, the main kinds of grinding methods are as follows:

External cylindrical grinding 

It produces a straight or tapered surface on the workpiece when it is rotated about its own axis between centers as it passes lengthwise across the face of a revolving grinding wheel.

Internal cylindrical grinding
  • It produces internal cylindrical holes and tapers. 
  • The work is chucked and rotated on its axis while the grinding wheel rotates against the work.

Centreless grinding 

It is a method of grinding external and internal cylindrical surfaces in which the work is supported among a regulating wheel, a grinding wheel, and a work rest blade.

Form grinding

 It is done with specially shaped grinding wheels to grind formed surfaces as gear teeth, threads, splined shafts, dovetails, etc.

Face grinding

 It is a method of grinding vertical flat surfaces and the wheel spindle may be vertical or horizontal.

Surface grinding

It produces flat surfaces and the work may be ground either by periphery or by the end face of the grinding wheel.

feed or plunge grinding

It is a method of grinding very short workpieces and involves the use of a grinding wheel having its face equal to or wider than the length of the surface to be ground and feeding the same into the work with no traversing motion of it.

Figure shows the Centreless grinding

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