Construction and Working of Tool and Cutter Grinding Machine
Construction and Working of Tool and Cutter Grinding Machine
Points : Construction and Working of Tool and Cutter Grinding Machine, Construction/Main parts of Universal Tool and Cutter Grinder, Table, Headstock and Tailstock, Wheel head, Cutter Grinding Wheels
The universal tool and cutter grinder, can be setup for a wide variety of grinding
operations. With various attachments, it can do internal, gear cutter, cylindrical and
surface grinding. It is designed to support milling cutters, taps and reamers while they
are sharpened to specified tolerances. Special attachments permit straight, spiral and
helical cutters to be sharpened. Many attachments and specially
formed grinding wheels are available. The wheel shapes most frequently used for tool
and cutter grinding. Because of the wide variety of work performed, no attempt will be
made to cover completely all the possible setups.
Construction/Main parts of Universal Tool and Cutter Grinder
The machine is constructed with a heavy, rugged box-type bed or base. A saddle is
mounted directly on top of the bed. It moves on antifriction ball bearings on hardened
ways. Mounted on the saddle is the column supporting the wheel-head. The column is
movable up and down and swivel to either side. The wheel angles required for various
kinds of work are thus made possible. The saddle also provides the means for moving
the wheel-head forward and back. The grinding wheel, can then be brought in contact
with the work. Over the saddle is mounted the top base containing the gears and
mechanism which control the table movement. The top base supports the ways for
the bearings on which the table rests and moves. The sib-tab1e moves longitudinally
on the ways and provides the traverse of the work before the grinding wheel. The
function of the main parts of the universal tool and cutter grinder is explained below.
1. Table
The worktable is mounted on the sub-table. It has T-slots for mounting the work and
the attachments used on the machine. The worktable is designed to swivel. With the
table slightly turned, the operator can grind tapers. Traverse of the table is controlled
by a hand vhee1. Hand-wheels also control the movement of the column and saddle.
TI table carries the headstock and tailstock, which, in turn, hold the work-piece.
2. Headstock and Tailstock
A headstock and tailstock similar to those on an ordinary lathe are mounted on the
table. For cylindrical grinding, the work-piece is positioned between the centers and
driven exactly as in the ordinary lathe. The work rotates toward the operator, and the
grinding wheel also turns toward the operator. At the point of contact, the wheel and
the work are moving in opposite directions. The headstock rotates a chuck for internal
grinding operations.
3. Wheel head
Back of the headstock and tailstock is the wheel-head. The abrasive wheel or wheels,
are driven by a separate motor ‘in the wheel-head. The wheel head can be swiveled
and positioned on the base for varied setups.
4. Cutter Grinding Wheels
Wheel shape depends on the cutter to be sharpened.t
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