HORIZONTAL BORING MACHINE , PARTS , MECHANISM, SIZE AND WORKING HOLDING DEVICES

In a Horizontal Boring Machine, the work is supported on a table which is stationary and the tool revolves in a horizontal axis A Horizontal Boring Machine can perform boring, reaming, turning, threading, facing, milling grooving, recessing and many other operations with suitable tools. Workpiece which are heavy, irregular, unsymmetrical or bulky can be conveniently held and machined.

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PARTS OF HORIZONTAL BORING MACHINE

BED: The Horizontal Boring Machine bed is that part of the machine which is fitted on the floor of the shop and has a box like casting. The bed supports the columns, table and other parts of the machine

Head stock supporting column: The Horizontal Boring Machine column provides support to the head stock and guides it up and down accurately by the guide ways provided on the face of the column.The column which is hollow houses the counter weights of the head stock and is heavily ribbed to add rigidity. some columns are stationary, others may be made to slide along the bed

End Supporting Column: The end supporting column of Horizontal Boring Machine situated at the other end of the bed houses the bearing block for supporting a long boring bar. The column may be adjusted on the sideways of the bed towards or away from the spindle for supporting different lengths of boring bars or it may be moved at right angles to the spindle as in the case of a floor type Horizontal Boring Machine.

Saddle and Table: The Horizontal Boring Machine table supports the work and is therefore provided with T-SLOTS for clamping the work or for holding various devices. The saddle permits the work to be moved longitudinally on the bed. The table may be moved crosswise on the saddle. These movements may be slow or rapid and is performed by hand or power.

Boring Bars: The boring bar of Horizontal Boring Machine supports the cutter for boring operations on jobs having large bore diameters. For short holes the bar may be supported on the head stock spindle end only, whereas for long work the bar is supported on the spindle end and on the column bearing block.
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SIZE OF A HORIZONTAL BORING MACHINE

The size of a Horizontal Boring Machine is specified by the diameter of its spindle in mm. The diameter of the spindle varies from 75 to 355 mm.To specify a boring machine fully other important dimensions such as spindle motor horse power, column heights , size of the table or size of the floor plate, spindle, speeds, feeds and length of feeds, floor space required, weight of the machine etc should also be stated.
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Horizontal Boring Machine
HORIZONTAL BORING MACHINE MECHANISM

The Horizontal Boring Machine contains different controls for movements of the different parts of the machine. A table type Horizontal Boring Machine has the following movements.

The head stock and the end of Horizontal Boring Machine supporting block may be moved up and down

The spindle of Horizontal Boring Machine may be rotated. The spindle has different speeds.

The spindle of Horizontal Boring Machine may be moved in or out by hand or power for feeding.

The saddle and the table of Horizontal Boring Machine may be moved by hand or power.

The columns of Horizontal Boring Machine may be moved by hand or power

All these movements of Horizontal Boring Machine may be given independently or in combination. As All the controls are housed in a particular position of the machine the operator may give a closer attention to the work while controlling the machine
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WORKING HOLDINGĀ DEVICES FOR HORIZONTAL BORING MACHINE

The work may be supported on the table by the conventional work holding devices or by special fixtures. Conventional work holding devices or by special fixtures. Conventional work holding devices comprise of T-BOLTS and clamps, angle plates , step blocks etc.Special jigs are used in mass production work. the jig locates the work and supports and guides the boring bar
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