Post on 19-Nov-2014
SIDE MILLINGOPERATION ON MILLING MACHINE
SIDE MILLING DEFINED:
Milling with a side-milling cutter to machine one vertical surface.
This operation is the machining of vertical surfaces, or surfaces at right angles to the axis of the milling cutter.
SIDE MILLING
CUTTING TOOLS USED IN SIDE MILLINGSIDE AND FACE CUTTER
Side and face cutters are much narrower and usually a larger diameter than slab mills. They are designed also to cut on the side of the cutter and employ a side clearance .
Side and face cutters are used to machine vertical slots and faces (when used on a horizontal mill).
CUTTING TOOLS USED IN SIDE MILLING
SIDE AND FACE CUTTER
CUTTING TOOLS USED IN SIDE MILLING ENDMILLS
An end mill, like a side and face cutter can perform both peripheral and face milling.an end mill may be considered a side and face cutter of relatively small diameter with a high width to diameter ratio. Due to the shank the end mill may only cut on one end face. The end teeth of an end mill do not cut across the full diameter of the face therefore an end mill should not be fed axially into the workpiece.
CUTTING TOOLS USED IN SIDE MILLING
ENDMILL
CUTTING TOOLS USED IN SIDE MILLING
PARTS OF ENDMILL
SELECTING PROPER SPEED
The formula for calculating spindle speed in revolutions per minute is as follows:
RPM = CSx4/DWhere :RPM = Spindle speed (in revolutions
per minute).CS = cutting speed of milling cutter (in
SFPM)D = diameter of milling cutter (in
inches)
SELECTING PROPER SPEED
For example, the spindle speed for machining a piece of steel at a speed of 35 SFPM with a cutter 2 inches in diameter is calculated as follows:
RPM = CSx4/D= 35×4/2= 70 RPM
SPEED AND FEED RATE
SPEED AND FEED RATE
SPEED AND FEED RATE
COOLANTS
SELECTION OF COOLANTS
The major advantage of using a coolant or cutting oil is that it dissipates heat, giving longer life to the cutting edges of the teeth. The oil also lubricates the cutter face and flushes away the chips, consequently reducing the possibility of marring the finish.
TYPES OF COOLANTS
Water-Soluble OilsWater-soluble oils combine oil
with emulsifiers and performance additives to create an oil-based coolant concentrate designed to be diluted with water.
TYPES OF COOLANTS
WATER SOLUBLE OILThese coolants provide the
lubricity of straight oil with the cooling and flushing abilities of water. Water-soluble oils are compatible with virtually all types of metal and their unbeatable corrosion protection safeguards valuable parts and expensive machinery.
TYPES OF COOLANTS
LARD OILLard oil is the clear, colourless oil
pressed from pure lard after it has been crystallized, or grained, at 7° C (45° F). It is used as a lubricant, in cutting oils, and in soap manufacture. The solid residue, lard stearin, is used in shortenings and as a source of saturated fatty acids
TYPES OF COOLANTS
MINERAL OILMineral oil is used in a variety of
industrial/mechanical capacities as a non-conductive coolant or thermal fluid in electric components as it does not conduct electricity, while simultaneously functioning to displace air and water.
TYPES OF COOLANTS
MINERAL OILSome examples are in
transformers where it is known as transformer oil, and in high voltage switchgear where mineral oil as an insulator and as a coolant to disperse switching arcs. Thedielectric constant of mineral oil ranges from 2.3 at 50 °C to 2.3 at 200 °C.
SIDE MILLING WITH COOLANT