AVC COLLEGE OF ENGINEERINGMechanical Engineering
DESIGN OF DRILL PCD ADJUSTABLE MECHANISM AND RESPECT MODIFICATION OF MULTI
DRILLING MACHINE.
Guided By
Mr.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