TOOL AND CUTTER GRINDER

TOOL AND CUTTER GRINDER

In a machine shop, much of the machining operations is done by single point tools or multi-point tools called milling cutters. The cutting tools become blunt due to constant usef, and need re-sharpening for continued production.Such re-sharpening is done in tool rooms, where a tool and cutter grinder is used for this purpose.A universal tool and cutter grinder is used to re-sharpen reamers, taps, single point tool and milling cutters, dies and punches.

PARTS AND CONSTRUCTION OF A TOOL AND CUTTER GRINDER (Fig 1):

Base
It supports all the other parts of the machine. The body and frame are in one unit. The driving and feed mechanism are fitted in the body.
Saddle
It is on the top of the body; it carries the table and traverses crosswise to the table movement.
Table
It is on the saddle. It reciprocates and can be swivelled to the required angle.
Column
It is on the back of the machine and it carries the wheel head, which moves up and down for the depth of cut.

Wheel head:
It has two grinding wheels on both ends of the spindle and can be swivelled to the required angle (360°).

Work head
It is a separate part and is fitted on the table for cylindrical works. It is driven by a separate motorfitted with the work head. It moves along the table and can be swiveiled to any angle (180°).
A tailstock is provided for supporting the mandrel between centres.

Specification of tool and cutter grinder
1 Maximum dia. of the wheel that can be held in the spindle.
2 Maximum height of the job that can be ground.
3 Maximum length of the job that can be ground.
4 Maximum breadth of the job that can be ground.
5 Type of drive
      Hydraulic
      Electrical.
6 Type number.

Attachments
A tool and cutter grinding machine is also used as a surface grinding, cylindrical grinding and internal grinding machine with the help of certain attachments.