Tool and cutter grinders are used primarily in production shops. A number of identically shaped and sized tools are used, or the tools require accuracy where various rake and other angles are to be set on the tool for economic reasons. Special drill or tool-bit grinders are justified by the large amount of grinding work necessary to keep production tools in proper cutting conditions. In addition, the tools can be ground uniformly with accurate cutting angles.
For the sharpening of miscellaneous cutters, universal type grinders are used. These are equipped with universal head, vise, head stock, tail stock, and numerous other attachments for holding tools and cutters. Although these universal type grinders are designed for cutter sharpening, these can also be used for cylindrical, taper, internal, and surface grinding.
In grinding of single point and parting off tools, various rake angles are to be given. A vise is used for this task. It can incline the tool in any plane accurately, thus making the grinding of that face of the tool easier. The vise is capable of being adjusted in three different planes and the rotation is graduated in degrees. The various angles are set and the tool is held at the top of the vise as it is fed across the revolving wheel.
Cutting Tool Reconditioning
Usually cutting tools are reconditioned using specialized grinding equipment. In the past, this was done manually, depending heavily on the skill of the operator. Today, numerical control techniques can be applied to tool and cutter grinders, producing high quality tools with greater consistency at lower costs. New industries like fiber optics demand precise cutting tool tolerances that cannot be provided by traditional tool room equipment. The present day requirements call for tolerances in microns, and tighter specifications on concentricity, finish quality of radii bends, and complex geometries. CNC tool grinders to produce consistent, high-quality tools are required for such applications.