BHAILALBHAI AND BHIKHABHAIINSTITUTE OF TECHNOLOGY

Vallabh Vidya Nagar

• NAME -PATEL KARTIKKUMAR BABUBHAI• ENROLMENT NO. -136040319060• SUBJECT.- MANUFACTURING ENGINEERING-III• BRANCH-.MECHANICAL• CLASS-.M5-A• BATCH - D

JIG BORING MACHINE

NEED OF JIG BORING MACHINE

The boring operation can be carried out on lathe and milling machine but the need of accuracy of holes, its quality and relative position of different hole centers is demanded in jig boring machine

WORKING PRINCIPLE OF JIG BORING PROCESS

The feed in the vertical axis of the hole and its radius. In this process rotating tool is passed over the process is given with respective to stationary work, This principal is used for large work pieces. while for small size work pieces tool is kept stationary and work is moved by applying force. The jig boring is a special type of boring process, hence its working principal is just similar to the boring process.

Working principle of jig boring m/c

CONSTRUCTION

Table provides longitudinal motion to the work piece. The table is arranged on the saddle. It can move in different on the guide ways of the saddle. A spindle head is provided at the top of this column, which is fixed on the guide ways of the column. The spindle is fixed using preloaded antifriction bearings. Jig boring machine generally consists of a heavy base and a column. & By moving the spindle head up and down, the vertical movement of the spindle is obtained. saddle cross movement to the work piece.

  MAIN COMPONENT OF JIG BORING MACHINE

head-stock :-it is also called spindle- head it is fixed on column in front side. Spindle is supported in quill. As this quill is moving up and down side becomes like a telescopic mechanism.

COLUMN:-it is also a hollow component made from cast iron. It is supporting the head stock , guide ways and vertical head provides axis for positioning.

BED:-the component which base to the machine is called bed it us made from C.I. it support the column, saddle, control penal and whole machine.

PICK-UP DEVICES:- it is attached on the table and saddle. It is helping in controlling various machine operations automatically. Again devices are necessary for accurate measurements.

TABLE AND SADLE:- table helps to clamp and hole the work piece in a fixture in required position. Hence t- shaped slots are made in it. The saddle provides possibility of longitudinal motion of the work piece.

  TYPES OF JIG BORING MACHINE THERE ARE MAINLY TWO TYPES OF JIG BORING M/C

1. Double column jig boring machine

2. Single column jig boring machine

DOUBLE COLUMN JIG BORING MACHINE

It is used for the large weight work pieces. This construction looks like a planer hence it is called a planer type jig boring machine. The vertical columns are provided at two sides of this machine.

Double column jig boring machine

SINGLE COLUMN JIG BORING MACHINE

It looks like a vertical milling machine, hence it is called vertical milling type jig boring machine. It is made of plain rotary table, inclined table and square table Single column jig boring machine is used for small size of component.

Single column jig boring machine

SPECIFICATION OF JIG BORING MACHINEThe jig boring machine is specified by following basis; • Maximum distance between spindle face, • Distance of spindle axis from column, • Minimum distance between spindle, face table& Various spindle speeds.• Least count of venire caliper,• Minimum measuring capacity of dial,• Horse power of table feed motor,• Horse power of main motor, • Maximum table transverse, • Dimension of working axis of table ,• Maximum weight of work which can be placed, • Maximum diameter that can be bored, • Diameter and taper of spindle hole table.

SYSTEM OF MEASUREMENT

The more accuracy is required in measurement taken by jig boring machine and in position, generally different measuring mechanisms are used for taking measurements. They are as under 1. Precision lead screw system 2. Scale and microscope system 3. End measurement system 4. Electro – magnetic system

BORING TOOLS AND MOUNTINGS

1. Boring bar2. Cutter heads 3. Facing heads TOOLS Based on shape4. Common type boring tool 5. Special boring tool Based on its construction

1. Forged type boring tool. 2. Carbide tip tool.

APPLICATION OF JIG BORING MACHINE

• For pilot hole• To produce compound and • progressive dies. • For drilling hole in jig-bushing. • For jigs, fixtures and dies & bushing hole for grinding & A grinding the hardened parts. • alignment post in stripper or die set.