AVC COLLEGE OF ENGINEERINGMechanical Engineering
DESIGN OF DRILL PCD ADJUSTABLE MECHANISM AND RESPECT MODIFICATION OF MULTI
DRILLING MACHINE.
Guided ByMr.P.Amith kishore , Asst. Prof/Mech.
Industrial GuideMr.A.Balakrishnan(DGM)
AXELS INDIA LTD, Sriperumbudur.
Submitted by
E.Krishna samy(80107144020)R.Sudhakar(80107144047)
V.Vasanthabharathi(80107144052)K.Veerapandian(80107144055)
PROBLEM DESCRIPTION• In order to drill multi hole of the 60SH and 90SH diff case
components in industries used a rigid fixture without any PCD (Pitch Circle Diameter) adjustments in nature.
• For That reason ,we have to work more for replacement of the rigid tool guide setup. But it practically gives more hard and work time delay.
• The conventional machine used for various type same ratio PCD drill components , but there is a need of adjustable tool guide is essential.
OBJECTIVES• To simplify the tool position adjustments.
• To reduce the time of drill PCD adjustments by the movable tool holding set.
• To avoid replacing of the rigid tool guider. Here we use adjustable clamping of tool holder.
DRILLING COMPONENTS• 60SHand 90SH they are components used in
the differential case in bus and heavy trucks respectively.
• They have twelve holes in the same angle ratio and slightly differed in the diameter of drill.
• All aspects of the drilling of that components are same. Simply says , they are same ratio in all.
COMPONENT VIEW
MULTI DRILLING MACHINE• Multi drilling machine is a heavy duty machine
type it has high drill force and motor power. in this case drill will be twelve holes at the same time.
• This machine specification: Speed of drill machine: 1700rpm Torque of the motor: 48 Nm Power of the motor: 11 Kw Feed rate of the machine : 400mm/min Drill bit diameter: 15mm
MACHINE VIEW
METHODALOGY
MACHINE MODIFICATIONS• Height variation provider.
• Plate dimensions changing with permissible limits.
• Minimum and maximum diameter of the drill PCD determination.
• Tool holder travel distance in the slot of the adjustable plate.
ADJUSTABLE PLATE• Adjustable plate consist of C shaped clamp with U bolts.
• Slots are formed in the plate for required size of the drill diameter.
• Then C shaped clamp with specified diameter, along with U bolts.
• This clamp diameter based on the diameter of the PCD of the component.
• U Bolt dimensions based on the clamp and tool holder diameter and it will be same for any type of C shaped clamp used here.
TOP VIEW OF THE PLATE
ADJUSTABLE PLATE DIMENSIONS
• Total length of the plate taken 700mm
• Travelling distance of the slider in slot simply it as triangle: 111.35 mm
• Distance travel of the slider with use of universal coupling: ((2*5.17)+111.35)=121.69mm
• Slot length up to out end: 2*distance travel)+2(slot circle diameter)+minimum diameter of the pcd: ((2*121.69)+(2*25)+164)=457.38mm
Contd…
• Position 1(Minimum) Height =(2*universal joint 1st yoke height )+(2*Universal joint
2 nd yoke height)+Propeller shaft length)
=(2*20)+(2*15.32)+222.69
= 292.79mm
Horizontal travel initially =0mm
Contd….
• Position 2(maximum)Height =(2*universal joint 1st yoke height )+(2*Universal
joint 2 nd yoke height)+Propeller shaft length)
=(2*20)+(2*19.32)+280.12
=358.76mm
Horizontal travel length=(2*yoke length )+(travel of shaft without universal joint)
= ((2*5.17)+111.35) = 121.69mm
Contd…
C shaped clamp dimensions: For minimum diameter of drill pcd Inner diameter =164+(2*12.5)=189mm Outer diameter =10+inner diameter U Bolt Dimensions: U bolt wire diameter taken as 10mm U bend diameter=10+slider diameter =10+25 =35mm
Recommendation 1(Hydraulic height variation adjustment)
All dimensions are in mm
POSITION ANGLE(DEGREE)
HARIZONTAL TRAVEL
HEIGHT VARIATION
STATUS DRILL PCD DIAMETER
1
2
140
165
0
121.69
0 (292.79)
66.15(358.94)
Minimum
Maximum
164
386.7
Recommendation 2(Spline shaft adjustment )
All dimensions are in mm
Position Drill PCD Angle Travelling distance
Height variation Spline hub Inserting(%)variation Spline in
hub
1
2
164
386.7
140
165
0
121.69
0
66.15
100%Inserted
33.85%Inserted
100/100=1*100
66.15/100=0.3385*100
COMPONENTS USED
• Propeller shafts• Universal joints• Spline joint• Press fit bush• U bolts• C shaped clamp• Linear bearing• Stud bolts
Propeller shaft and universal joint
UNIVERSAL JOINT ANIMATION
MODEL AND MACHINE VIEW
3D VIEW OF TOOL GUIDE
3D VIEW
ADVANTAGES
• Easy to handle the adjustment clamps and U bolts while clamping.
• No need of fork lifts.
• No need to replace the tool guide components.
• Adjustment and clamping time will be very much less compare than formally used.
DISADVANTAGES
• Hydraulic system for height variation is excessive one.
• This components should be newly manufactured.
CONCLUSION• This project will give good effort and easy
use of machine.
• Easy implementation of the guide plate.
• This is feasible and possible to implement in that particular HMT multi drilling machine.
Thank you
