Drill jig and fixture

drill jig and fixture

1. Drill Jig and Fixture





Group-MAE-7
Team(Advent Boys) Members-
 Vitthal Vashishth(046)
 Deepak Gahlan(002)
 Yatin Bhasin(053)
 Rohit Sharma(019)
 Amit Saraswat(035)

2. Index-
 Introduction
 Material
 2D Design of Drill Jig and Fixture
 Design of Drill Jig and Fixture (PRO-E)
 Development Process
 Developed Model of Drill Jig and Fixture

3. INTRODUCTION
The successful running of any mass production depends upon the
interchangeability to facilitate easy assembly and reduction of unit cost.
Mass production methods demand a fast and easy method of positioning
work for accurate operations on it. jigs and fixtures are production tools
used to accurately manufacture duplicate and interchangeable parts. Jigs
and fixtures are specially designed so that large numbers of components
can be machined or assembled identically, and to ensure
interchangeability of components.
JIGS
It is a work holding device that holds, supports and locates the work
piece and guides the cutting tool for a specific operation. Jigs are usually
fitted with hardened steel bushings for guiding or other cutting tools. A
jig is a type of tool used to control the location and/or motion of another
tool. A jig's primary purpose is to provide repeatability, accuracy, and
interchangeability in the manufacturing of products. A device that does
both functions (holding the work and guiding a tool) is called a jig.
FIXTURES
It is a work holding device that holds, supports and locates the work
piece for a specific operation but does not guide the cutting tool. It
provides only a reference surface or a device. What makes a fixture
unique is that each one is built to fit a particular part or shape. The main

4. purpose of a fixture is to locate and in some cases hold a workpiece
during either a machining operation or some other industrial process. A
jig differs from a fixture in a way that it guides the tool to its correct
position in addition to locating and supporting the workpiece.
Examples: Vises, chucks

5. MATERIAL

Mild steel- It is the most common form of steel. It is not brittle. It is
cheap. It is often used when large amount of steel is needed.

Mild steel is a carbon steel typically with a maximum of 0.25%
carbon and 0.4-0.7% manganese, 0.1-0.5% silicon and some traces of
other element such as phosphorous, it may also contain lead (Free
cutting mild steel) and sulphur (again free cutting steel) called
resulpherised mild steel.

Many every day object are made from mild steel, even some of your
pots and pans. 'Mild steel' is typically carbon steel, with a comparatively
mild amount of carbon (0.16% to 0.19%). It has ferromagnetic
properties, which make it ideal for manufacture of electrical devices and
motors.

6. 2D DESIGN OF DRILL JIG AND FIXTURE

7. DESIGN OF DRILL JIG AND FIXTURE (PRO-E)
(STEP-BY-STEP APPROACH)

1. Step 1 (base of fixture):
Pro e software is opened and file>new> part.
Then go to extrude feature and select placement plane as front
plane as shown on figure and then
Make the sketch and extrude to given depth.
Then click on scroll button.

8. Extruding it.





2. Step 2 (creation of vertical plate):
Select the back face of base plate as placement for extrude and create
the sketch as shown below and then extrude it to given length.
Then click on scroll button.

9. Extruding vertical plate.

10. 3. Step 3(top plate):
Now select top face of the vertical plate as placement for extrude and
then create the sketch as shown below and then extrude it.
And then click on scroll button.

Extruding it.

11. 4. Step 4(creation of pins for holding work piece):
Select the back face of the vertical plate as extrude placement then
create a sketch as shown below and then extrude it to given length.


Extruding it.

12. 5. Final view of the drill jig and fixture developed in pro-e:



Completed Design

13. DEVELOPMENT PROCESS

The development process of the drill jig and fixture consists of the
following operations:
a. Shaping process
b. Grinding process
c. Drilling process
d. Welding process
e. Finishing process

Shaping process

In this process we have taken a long bar of mild steel of thickness 13mm
and cut it into 2 parts one for base (dimension 73.3mmX51.3mm) and
other for vertical plate (dimension 73.3mmX36.3mm) then we have
taken another bar of thickness 4mm and cut it in dimension
73.3mmX47mm and in this process we have to continuously pour water
on the metal because its temperature rises sharply.

14. Surface grinding process
After the cutting process we done some grinding process
In this process we put metal on the machine and with the help of
electromagnetic base it holds the metal without any vibrations and then
grinding wheel is rotated and dimension is putted into tolerance limit.



Surface Grinding machine

Drilling process
In this process drilling of holes is done
Plates are held in the fixture and then holes are drilled.

15. Welding process
Welding is done on the plates and the joint is T joint both outer and
inner edge is weld for strength purpose.

Finishing process
The extra weld (slag) is chipped off and then again grinding is done.

16. DEVELOPED MODEL OF DRILL JIG AND FIXTUR E




Front view Side view







Top view Front Back view

17. ISOMETRIC VIEW