Gear Box Design for Milling
Machine
Presented by-Takate Rohan R.
Tathod Vishal B.
Thombare Krishna K.
Vaghode Roshan M.
Wadekar Dnyaneshwar S.
Guided By-Prof.A.V. Deokar
Content
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Milling
Types of Milling machine
Construction
Working Principle
Milling Operations
Case Study
Problem Statement
Gearbox requirement
What is MillingMilling is the process of
machining using rotary cutters to
remove material by advancing a cutter
into a work piece. This may be done
varying direction on one or several
axes, cutter head speed, and pressure.
Types Of Milling MachineKnee-type milling machine.
Universal horizontal milling machine.
Ram-type milling machine.
Universal ram-type milling machine.
Construction:
The main part of machine is base,
Column, Knee, Saddle, Table,
Overarm, Arbor Support and Elevating
Screw.
• Working PrincipleThe workpiece is holding on the
worktable of the machine. The table movement
controls the feed of workpiece against the
rotating cutter. The cutter is mounted on a
spindle or arbor and revolves at high speed.
Except for rotation the cutter has no other
motion. As the workpiece advances, the cutter
teeth remove the metal from the surface of
workpiece and the desired shape is produced.
MILLING OPERATIONS
• Plain or slab milling
• Face Milling
• Angular Milling
• Straddle Milling
• Form Milling
• Gang Milling
Case Study
• TURBO Universal milling machine, Workshop, AVCOE, Sangamner, Model.
No. MAC- 2
• Horizontal axis milling machine
Problem Statement• Material : AISI 4340 (36CrNiMo4/1.6511)
• Brinell Hardness : 248-300 BHN]
• Tensile Strength : 850 Mpa
• Tool dia. : 63 mm
• No. of inserts : 14
• Feed/tooth : 0.11 mm/tooth
• Spindle Speed : 250 rpm
• Effective Rake Angle : 25˚
• Lead Angle : 30˚
• Depth of cut: 5 mm
Gear Box Requirements
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Output Speed : 250 RPM
Output Power : 5.01 KW (6.81 HP)
Gear ratio: 12:1
Motor Selected: 5.5 kw, 3000 rpm