Drilling and Boring Machines

Date: 2015-10-07; view: 427.

Milling Machine

Shaper and Planer

Lathe

Conventional Machine Tools

A lathe, the oldest and most common type of turning machine, holds and rotates a workpiece shaping the material with a cutting tool. The tool may be moved parallel to or across the direction of rotation forming parts that have a cylindrical or conical shape or to cut threads.

The shaper is used to produce flat surfaces. It uses a single-point tool and is comparatively slow. For this reason, the shaper is seldom found on a production line. It is, however, essential in tool rooms and job shops when a few identical parts are being made.

The planer is another machine which is the largest of the reciprocating machine tools. Like the shaper, the planer is used where identical, horizontal, or diagonal cuts are being produced.

In a milling machine, a workpiece is cut by a circular device with a series of cutting edges on its circumference. The workpiece is held on a table which is feeding it against the cutter. The table has three possible movements: longitudinal, horizontal, and vertical; in some cases it can rotate.

Hole-making machine tools are used to drill a hole where none previously existed; to change a hole in accordance with some specification. There are different drilling machines: from hand drills to radial drilling machines and multispindle units. Boring is a process that increases holes previously drilled.