What is a grinding machine?!!
A grinding machine is a machine tool used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel’s surface cuts a small chip from the work piece via shear deformation. Grinding practice is a large and diverse area of manufacturing and tool making. It can produce very fine finishes and very accurate dimensions; yet in mass production contexts it can also rough out large volumes of metal quite rapidly. It is usually better suited to the machining of very hard materials than is 『regular』 machining (that is, cutting larger chips with cutting tools such as tool bits or milling cutters), and until recent decades it was the only practical way to machine such materials as hardened steels. Compared to 『regular』 machining, it is usually better suited to taking very shallow cuts, such as reducing a shaft’s diameter by half a thou.
The grinding machine consists of a power driven grinding wheel spinning at the required speed (which is determined by the wheel’s diameter and manufacturer’s rating, usually by a formula) and a bed with a fixture to guide and hold the work-piece. The grinding head can be controlled to travel across a fixed work piece or the work piece can be moved whilst the grind head stays in a fixed position. Very fine control of the grinding head or tables position is possible using a vernier calibrated hand wheel.
Grinding machines remove material from the work piece by abrasion, which can generate substantial amounts of heat; they therefore incorporate a coolant to cool the work piece so that it does not overheat and go outside its tolerance. The coolant also benefits the machinist as the heat generated may cause burns in some cases. In very high-precision grinding machines (most cylindrical and surface grinders) the final grinding stages are usually set up so that they remove about 2/10000mm (less than 1/100000 in) per pass – this generates so little heat that even with no coolant, the temperature rise is negligible.
What does a tool & cutter grinder do?
A tool and cutter grinder is used to sharpen milling cutters and tool bits along with a host of other cutting tools.
It is an extremely versatile machine used to perform a variety of grinding operations, surface, cylindrical, or for the grinding of complex shapes.
The operation of this machine (in particular the manually operated variety) requires a high level of skill. The two main skills needed are:
1. understanding the relationship between the grinding wheel and the metal being cut
2. knowledge of tool geometry. The illustrated set-up is only one of many combinations available, the huge variety in shapes and types of machining cutters requires flexibility in usage.
A variety of dedicated fixtures are included that allow cylindrical grinding operations or complex angles to be ground.
The table moves longitudinally and laterally, the head can swivel as well as being adjustable in the horizontal plane, as visible in the first image. This flexibility in the head allows the critical clearance angles required by the various cutters to be achieved
Peiping Precision provides
“Simple to set up, easy to operate, grinding fast and precise” Tool & Cutter Grinders for drills, taps, end mills, ball nose cutters, gun drill, carving cutter, lathe tool…etc.
