It would interest anyone who is into machining and its technicalities to learn about centreless grinding. There are several different types of grinding and this is among them. The definition is, it is a type of grinding in which cylindrical parts are not held between centers but rather are supported on a work rest and rotated.
To further expound on this type of grinding, centreless grinding is a method of material removal through “grinding”. One that is similar to centered grinding however there is an absence of the spindle. This has a high through-put, meaning, large number of parts can be manufactured in just a short period of time.
Wondering about how this work piece is set up, you should know that it is set up between the regulating wheel or the back wheel and the grinding wheel. This is supported by the work blade or otherwise known as the work rest – one that is located between the wheels. So this is how it works: the work is placed upon the work rest and this together with the regulating wheel is fed forward which in turn forces the works against the grinding wheel. In order to obtain the axial movement of the work past the grinding wheel, the regulating wheel is tilted at a slight angle from horizontal. To serve this purpose, an angular adjustment is provided from 0 to 8 or 10 degrees.
There are two types to classify centerless grinding and they are the throughfeed grinding where the work piece is fed into the machine along the work blade; and the Plunge Grinding where the work piece is placed between the wheels on a work blade and the grinding wheel is plunged into the work piece. There are known benefits of this grinding and it includes the ability to grind parts with geometries that won’t allow them to be OD ground. Another is its ability to remove lobbing on the shaft of a part in three, five and other odd numbers. One other benefit is its capacity to maintain size beyond the typical capability of an OD grinder. This is because there is low overall pressure that is spaced out along the work piece.
If you are looking to get the best quality in terms of this type of grinding, find one from a well established source – one with a large and varied customer base. You may always look for referrals from those who may have been a client like those in precision engineering, aerospace, automotive and even medical or defense industries.
The reputation of the maker of your choice matters and they ought to aim for further improvement along with customer satisfaction where what is competitive is not only its quality produced but as well as its price.