BORING MACHINE ENROLLENMENT NO:588,589,590,591,592,593 NAME:ABHIJIT, CHIRSTOPHER,RUCHIT,PRATIK,ANKIT ENROLLENMENT NO:588,589,590,591,592,593 SUBJECT:MANUFACTURING PROCESSES -1 (2131903) CLASS: MECHANICAL (D)

CONTENT HORIZONTAL BORING MACHINE VERTICAL BORING MACHINE PRECISION BORING MACHINE JIG BORING MACHINE

What is boring machine? Machine Tools used to bore hole in large & heavy parts. Such as in engine frames, steam engine cylinder , machine housings , etc. Can do operations like drilling ,reaming, facing, milling, & threading.

There are mainly three types of boring machine 1 There are mainly three types of boring machine 1. Horizontal boring machine a.  Table type    b. Planer type c. Floor type d. Multiple spindle 2. Vertical boring machine a. standard vertical b. turret type (Vertical Turret Lathe) 3. Precision boring machine 4. Jig boring machine a. vertical milling machine b. planer type

Horizontal boring machines Work is supported on a table which is stationary & tool revolves in a horizontal axis. Can perform boring , reaming , milling, grooving , recessing ,etc with suitable tools. W.P which are heavy, irregular , unsymmetrical or bulky can be conveniently held & machined.

A-TABLE TYPE BORING MACHINE Horizontal table which can be adjusted along or across the bed. W.P is supported & guided by the table. Tools are held, rotated & guided by the head stock movement along the axis.

Spindle head is supported & guided on the guide ways on a vertical column bolted on one end of the bed. (up & down motion). Boring bar is provided on the opposite end of the head stock for supporting long & heavy boring bars. Used for cylinder blocks, large gear box bodies, etc.

B-Floor type horizontal boring machine Does not have a table and uses floor plate having T slots to locate the work piece. Used for heavier work. During the operation the work is stationery and the spindle end support is transversal along the runway past work. Any cross wise adjustment and cross feed is provided by the spindle and not by work

C-Planer type horizontal boring machine The machine resembles the table type except the table movement. Table slides directly on a bed and reciprocates like planar End supporting column and head stock supporting column can be adjusted towards or away from the table to jobs of different width. machine is suitable for long jobs.

D-Multiple head type horizontal boring machine The machine resembles to a Plano miller. May have two, three, or four head stocks which may be swiveled for angular cuts. Table is supported on a long bed on which it reciprocates. Used both for horizontal as well as vertical boring.

Vertical boring machine Work rotates on a horizontal table about vertical axis and tool is stationery. m/c is suitable for large heavy work which cannot be machined on a center lathe. Since the work is mounted on a table there is no over hang and hence no chance of a spindle being bent under heavy load.

Types of vertical boring machine Two types of vertical boring are common in use:- Standard vertical boring machine Turret type boring machine

Standard vertical boring machine Provided with two vertical tool heads. Cross rail carrying the tools can be adjusted up and down, to accommodate work pieces of different height. Tool head assembly consist of the saddle, ram and tool post. Table of the machine can be fitted with chuck jaws for holding circular work or provided with T slots for holding irregular work piece.

Turret type boring machine Vertical tool holder, in the form of turret, carries five tools with an indexing arrangements. One of the vertical tool heads on the machine may be of the turret type having number of tools while the other is ram type with single tool holder. A four station square turret may also be mounted on the side head which facilitates operations like facing, turning, undercutting, etc.

Precision boring machine Uses single point tool to machine surfaces rapidly & accurately. Cemented carbide & diamond tipped single point tools are operated at very high cutting speed. Feeding movement may be provided by the tool or by the work. Machine may be horizontal & vertical type.

Jig boring machine The bed supports and provides guide ways for a saddle on which the table is supported and moved A work piece on the table can be given motion in co-ordinate directions in the horizontal plane The vertical spindle rotates and moves up and down with its quill in a housing supported and clamped on the column. Used for jigs , fixture, dies, tools.

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