IRJET- Design and Development of Modified Jig for Angular Drilling on Cylindrical Part

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 03 | Mar 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 2986
DESIGN AND DEVELOPMENT OF MODIFIED JIG FOR ANGULAR DRILLING
ON CYLINDRICAL PART
Gaurav R. Gotmare1, Manish J. Apotikar2, Nakul S. Ghogare3, Mr. Mahesh R. Pundkar4
1,2,3UG Students, Department of Mechanical Engineering, College of Engineering and Technology, Akola,
Maharashtra, India
4 Assistant Professor, Department of Mechanical Engineering, College of Engineering and Technology, Akola,
Maharashtra, India
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Abstract - This paper gives the detailed information about
drilling jig and also identified theflagrantadvantagesthatare
associated with the use of modifiedjigsinmanufacturing. Now
a day, development is with large scale of production as well as
with good quality of products is shoot up in market, so
everyone is developing new design of jig and fixture for saving
the production time. In case of drilling machine to reduce
production timing with fine accuracy jigs are used, because
drilling machine is most vital and commonly used for
producing hole on any machine part with optimum surface
quality as well as at less cost. The main objective of using jigs
in an industry is to achieve the mass production or
interchangeable part concept. Thebasicelementsinthedesign
of indexing type of drill jig are component model, location,
orientation and clamping. The scope of this paper is to design
a drilling jig for linear as well as circular indexing for a
circular component having angular hole up to 360° on its
periphery this type of design is validated and verified. The
modeling is done with the help of Solidworks design tool.
Key Words: Drilling Jig, Angular Drilling, linear
indexing, Solidworks.
1. INTRODUCTION
Now a day, manufacturing plays a vital role in developing as
well as developed countries and the respective
manufacturing industry are developing day by day with
latest ideas for different components some of them are
challenging task in manufacturing point of view. Also, the
factors like time, accuracy, repeatability and obtained the
quality of product as per customer’s demand plays a crucial
role in manufacturing. Anybody who worked to drill on
periphery of circular component is familiar with the
upcoming difficulties like as slipping of drill, going the drill
bit off side. So making hole on cylindrical periphery of the
workpiece being always a challenging task.Forsingleholeto
be drilled there is no problem, but the numberofholesareto
be drilled at equal distance on cylindrical periphery is
critical task because the tolerance is very high and mistake
are not allowed in mass production. Generally, the vertical
drilling machines are commonly used in any machine shop
so, there are a lot of chance to make a mistake from starting
to end of the process (i.e. marking, dividing aswell asfinding
the center of cylindrical workpiece) because the operation
performed on drilling is manually. So our project is
concerned about the design, development and fabrication of
drilling jig for making an angular hole on solid as well as
hollow periphery of cylindrical workpiece to reduce the
mistake while angular drilling on vertical drilling machine.
2. PURPOSE OF DRILLING JIG:
The basic purpose of developing drilling jigs for mass
production in machine shop are given below-
A. Easily guide the cutting tool while drilling.
B. Comfortable the angular drilling for unskilledlabor.
C. To eliminate the marking, positioning and
alignment error.
D. Reduction of overall manufacturing cost and save
the production time.
3. LITERATURE REVIEW
1. Prof. M. M. Patil et. al [1], concluded that the design of
drilling jig is very cheap to adopted for drilling operation on
periphery of hollow cylindrical component. For saving the
unnecessary cost in automation they have used manual
indexing mechanism and that method is very easy as well as
most superior for work and unskilled labor can operate
easily with precision.
2. D P Kute et. al found that [2] the design of jig and fixture is
used to drill five equidistance concentric holes on coupling
hub and they pointed out the difficulty which comes during
making a concentric holeatequidistanceonthecoupling hub
and they have used regular pentagonal structure block for
indexing and they made indexing jig with cheap cost.
3. Nagarajan et. al [3] suggested that the importance of jig
and fixture for holding hollow cylindrical component. They
have explained how difficult is the indexing and positioning
of hollow circular component by indexing plate with crank
and sector mechanism. The author has an attempt to made
the design and fabrication of jig and fixture for indexing as

well as positioning of the hollow cylindrical component for
drilling machine at economical cost.
4. Raghavendra H et. al performed analysis in [4] on drilling
jigs and fixture find out stresses actingonjigsunderworking
condition as well as they did modeling by using solid edge
design tool and performed drilling operation on different
materials.
4. PROBLEM IDENTIFICATIONS
A. At initial condition author made economical design
(1) but, the drilling angle can set between 00 to 600
on both side during setup.
B. Author made a precious design (4) but, only able to
make an angular hole on hollow circular workpiece
and it’s very difficult forholdingthesolid workpiece
for angular drilling.
C. At initial condition (5) author made the design of
drilling jig for drilling on circularworkpiecewithfix
position so, able to drill at same position on each
workpiece and position of drill cannot be change.
5. METHODOLOGY
In this paper we are trying to make the design safer and
precious. The following methodology we have adopted as
per above difficulty-
A. In our design we have used special purpose
clamping arrangement it help to clamp the solid as
well as hollow circular shaft and here is one back
supporting member through which the workpiece
will pass, so it works as a fixed beam and finally
improve the drilling load carry capacity of
workpiece as shown in fig. 3 and fig. 4
B. In modified drilling jig design, we can drill a hole
upto 3600 as shown in fig. 7
C. We have provided one circular indexing
mechanisms as well as one linear. It will help to
drill a hole at a particular angle with a particular
distance as shown in fig. 7
D. We have provided one locking arrangement beside
the clamping arrangement, it will help to lock the
pin for set a particular angle as shown in fig. 5 and
fig. 7
5.1 DESIGN CONSIDERATION:
The following points are to betakenintoconsideration while
designing a drilling jig-
A. The clamping is done as quick as possible and
required less amount of effort and easy to remove
after drilling operation.
B. Part must be easily replaceable if failure occurred.
C. The movement of work piece must be restricted
while drilling.
D. The design must be robust as well as possess
enough rigidity to prevent vibration.
5.2 DESIGN OF MODIFIED DRILLING JIG
COMPONENTS
All the below components are performing important
function during machining and its design made by using
SOLIDWORKS software.
5.3 CALCULATIONS FOR DESIGN ANALYSIS
The standard formula for the various forces associated
with the operation of jigs are explained below-
*Drill Bit size is 8mm
We know that,

I) Thrust = 1.16 × K × d × (100 × S)0.85
Drilling Force ------------(1)
Where,
K-Material Factor
d- Diameter of Cutting tool (mm)
S- Feed rate (mm/Rev)
So,
K for M. S is 1.5, Diameter of drill bit is 8mm,
S as per drill bit size is taken as 0.169 mm/rev
Put all the value in equation 1,
Thrust = 1.16 × 1.5 × 8 × (100 × 0.169)0.85
Drilling Force =153.93 Kgf ≈ 1509.53 N
II) Force acting on each of the lips,
KS= PZ -------------(2)
A
Where,
KS- Cutting force
PZ- Force acting on each of the lips
A-Area of cutting hole
So,
KS= (K×S) (K is material factor)
= (1.5×0.169)
= 0.2535 Kgf ≈ 2.48N
Then,
A= π × d2 (We know d is 8mm)
4
= 50.26mm2
Put all the value in eqn 2,
Then, we will get force acting on each of the lips,
0.2535= Pz
50.26
Pz = 0.2535 × 50.26
= 12.73 Kgf ≈ 124.83 N
III) Torque (M)= PZ × d
20
M= 124.83 × 50.26
20
= 49.93 N-mm
IV) Thrust (T)= 0.195 HB × S0.8 × d0.8 + 0.002 HB × d2
-------------------(3)
Where,
HB- Brinell Hardness & for MS HB is 130
d- Diam. Of cutting tool
S- Feed Rate
Put all the value in eqn 3,
T= 0.195 × 130 × 0.169(0.8) × 8(0.8) + 0.002×130× 82
T = 50.57N
V) Clamping Force (Q)= M × FOS
= 49.93 × 3
= 149.73N ≈ 150N
VI) Spindle Speed (N) = Cutting speed × 12
π× Diam. Of drill bit
= 100 × 12 = 1198 rpm
π×0.319
where,
Standard Cutting Speed for MS 100
Diam of drill bit is in inch.
VII) Thrust = 1509.53 -----(According to eqn 1)
Drilling Force -------------(4)
But, we know that,
Thrust =50.57 N
Put the value in equation 4
We will get,
50.57 = 1509.53
Drilling Force
Drilling Force= 0.033N
From above calculation we can say that drilling force is
negligible.
VIII) Machining Timing (TC)= Id × I
N × FR
Where,
Id- Depth of hole (10mm), N-Spindle Speed(1198rpm),
I-No of holes (1), FR- Feed/Rev (0.169)
TC= 10 × 1
1198 × 0.169
TC= 0.049 min/ Workpice.
TC=2.96 Sec/ Workpiece.

5.4 CAD MODEL OF MODIFIED DRILLING JIG
5.5 FABRICATION MODEL OF MODIFIED DRILLING
JIG
6. CONCLUSION
In this paper, we have made the design of drilling jig for
angular drilling on hollow as well as solid cylindrical
component. After performing trial on drilling machine, we
concluded that the making use of this drilling jig the holding
and indexing of the cylindrical component is made easy this
will give high accuracy as well as less consumption of time
for setup the angle during drilling operation as compared to
conventional drilling process and according to our
calculation clamping force is more asthedrillingforceso our
design is safe for use and the design of drilling jig
components is made by using Solidworks design tool, So we
suggested that, this type of drilling jig can be used for road
side workshop as well as small scale industry where mass
production is done.
REFERENCES
[1] Prof. M. M. Patil1, Prof. N. P. Kherde2, “Design and
Development of Jig for Drilling of Circular Part Periphery”,
International Journal of Interdisciplinary Innovative
Research & Development (IJIIRD), Vol. 03, Issue 2018, ISSN-
2456-236X.
[2] D P Kute1, A V Gadge1, A P Kedar2, “CAD MODELLING &
CONCEPT DESIGN OF JIG FIXTURE FOR CONCENTRIC
DRILLING”, International Journal of Mechanical Engineering
and Robotics Research (IJMERR), Vol.03, Issue April 2014,
ISSN 2278-0149.
[3] Nagarajan1, I Anbarasan2, P Aravind3, A Madesh4,
“DESIGN AND FABRICATION OF JIG AND FIXTURE FOR
HOLLOW CYLINDRICAL COMPONENT IN DRILLING
MACHINE” International Journal of Mechanical Engineering
and Technology (IJMERT), Vol.01, Issue 2015, ISSN 2454-
535X.
[4] Raghavendra H1, Shanti Kiran M2, Sunitha M S3, “Design,
Fabrication and Automation of Indexing Drill Jig”,
International Journal of Science & Engineering Research
(IJSER), Vol.09, Issue 2018, ISSN 2229-5518.
[5] “Jig and Fixture” by P.H. Joshi Tata McGraw-Hill
Education, 2010

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