SHIVAJIRAO JONDHALE COLLEGE OF ENGINEERING

SEMESTER 5 SUBJECT:DESIGN OF JIGS AND FIXTURE

PROFESSOR:DHIRAJ SINGH

TYPES OF JIGS

DRILL JIG

INTRODUCTION JIG: A jig is a guiding device, these devices are provided

with attachments for guiding, setting, and supporting the tools in such a manner that all the workpieces produced in a given jig

Jigs are used to locate and hold the work that is to be machined

A jig can be designed for a particular jobThe form to be used depends on the shape and requirement

of the workpiece to be machined.ADVANTAGES: The employment of unskilled labor is

possible when jigs and fixtures can be used in production work. The repetitive layout and setup (which are time-consuming activities and require considerable skill) are eliminated. Also, the use of these devices can result in such a degree of accuracy that workpieces can be assembled with a minimum amount of fitting.

TYPES OF JIGS:LEAF JIG

BOX TYPE JIG

CHANNEL JIG

OPEN TYPE JIG PLATE

TYPE JIG

TEMPLATE JIG

ANGLE PLATE JIGSANDWIC

H JIGTRUNNIO

N JIGINDEXING

JIG

JIG

END

Leaf jigDEFINATION:The leaf jig is actually a modification of sandwitch jig,this jig uses a hinge leaf with a camtype latch .Different elements are used in designMaterial of drill bushs is harder than drill bitIt is open type jigDrill bushes are fitted into jig plateJig plate is hinged to easy loading and unloading with hinge pin

FRONT VIEW

ELEMENTS OF LEAF JIG

Drill bush Jig feet Hinge pin

TEMPLATE JIGDEFINATION: It is simply a plate made to the shape and size of the work piece; with the require number of holes made itThis is the simplest type of jig.It is placed on the work piece and the hole will be made by the drillWhich will be guided through the holes in the template plate should be hardened to avoid its frequent replacementThis type of jig is suitable if only a few part are to be made.

FRONT VIEW

ANGLE-PLATE JIGDEFINATION:Angle-plate jigs are used to hold parts that are machined at right angles to their mounting locators Pulleys, collars, and gears are some of the parts that use this type of jigA variation is the modified angle-plate jig, which is used for machining angles other than 90 degrees

FRONT VIEW

TRUNNION JIGDEFINATION:Trunnion jigs are a form of rotary jig for very large or odd-shaped parts The part is first put into a box-type carrier and then loaded on the trunnion.This jig is well suited for large, heavy parts that must be machined with several separate plate-type jigs.

FRONT VIEW

BOX JIGDEFINATION:When the holes are to drill more than one plane of the work piece , the jig has to be provided with equalant number of bush plates,such jig is called box jigThis jig is box like design and hence it is called box jig For positioning jig on the machine table feet have to be provided opposite each drilling bush plate One side of the jig will be provided with a swinging leaf for loading and unloading the work piece, such a jig would take the form of a box. Such a jig should be as light as possible. Since it will have lifted again and again.

FRONT VIEW

PLATE JIGDEFINATION:. The plate jig are employed to drill holes in large parts, maintaining accurate spacing with each other. The work piece can be clamped to the plate and holes can be drilled.In place of simple holes, drill bushes are provided in the plate to guide the drill. This is an improvement of the template type of jig. The only difference is that plate jigs have built-inclamps to hold the work.Plate jigs are sometimes madewith legs to raise the jig off the table for large work.This style is called a table jigThese jigs can also be madewith or without bushings, depending on the numberof parts to be made.

FRONT VIEW

INDEXING JIG DEFINATION: Indexing jigs are used to accurately space holesor other machined areas around a partLarger indexing jigs are calledrotary jigs.Jig uses either the part itself or a reference plate and aPlunger

FRONT VIEW

SANDWICHDEFINATION: Sandwich jigs are a form of plate jig with a backPlateThis type of jig is ideal for thin orsoft parts that could bend or warp in another style ofjig.Here again, the use of bushings is determined bythe number of parts to be made.

FRONT VIEW

OPEN TYPE JIGDEFINATION: In this jig the top of the jig is openwork piece is placed on the top

FRONT VIEW

CHANNEL JIGDEFINATION:The channel jig is a simple type of jig having channel like cross sectionThe tool is guided through the drill bush.The component is fitted within the channel is located and clamped by locating the knob.Channel jigs are the simplest form of box jigThe work is held between two sides andmachined from the third sideIn some cases, where jigfeet are used, the work can be machined on three sides

FRONT VIEW

Presentation on jigs by group: T.E Production

Abhishekh Rane

Nikhil Dhawale

Rushabh Saparia

Sushant Mantrawadi

Harshal Sarvankar