Whereas, the chip thickness will be greater at the beginning and lesser at the end in the case of down-milling. Milling Machine Working Principle:Ĭhip Thicknesswill be minimum in the beginning and maximum at the end in the case of up-milling. Power required for the rotation of the spindle is obtained from the motor through the belt, gear, and clutch assembly. The spindle is also an important part of the machine as it is the part where the multipoint cutter is attached. The top portion of the column contains the spindle. The basic function of the over-arm is to support the arbor and spindle. Overarm is present at the top of the column. A table can travel longitudinally in a horizontal plane. The table consists of T-slots or sometimes fixtures are used for holding up the workpiece on the table. The table is present on the top of the saddle. Its basic function is to support the table.Ī saddle can slide on the guideways which are exactly at 90 degrees to the column face. Saddle moves crosswise(in or out) on guideways provided on the knee. The saddle is present on the top of the knee which further carries the table. It is attached to the column and has guideways by which it can move up and down with the help of the elevating screw for adjusting its height. This is an important part of this machine that supports the other parts like the saddle and table. The knee shape is quite similar to that of the human body knee. The driving mechanism usually consists of a cone pulley mechanism in which the v-belt is being used to connect it to the motor.įurther by using this driving mechanism the speed of the machine can control as per our requirement. The main supporting frame which consists of all the driving mechanisms and the motor is called the column. Cutting fluid can also be stored in the base. It also helps in the absorption of shocks. The base is mostly made up of cast iron, so it has good strength and rigidity. It is a type of foundation for the machine. The base is the part upon which the whole machine parts are being mounted. It is very accurate and has a high production speed Gradually with time now we have the most advanced form of the Milling machine which is the CNC Milling Machine. Now, these machines can perform multiple operations. Later he developed a semi-automatic Milling machine which further enhanced the production. Eli Whitney got a big order from the government for the production of Musket. Inventor name: Eli Whitney invented the Milling machine in the year 1818.ĭuring that time, it was used for the making of gun parts. This was the better-developed form of the Milling machine. Then in the 18th century in the united states, a machine was used which was similar to the lathe machine but in this machine, The cutting tool is used to rotate and the workpiece uses to remain stationary. It was used by the clockmakers at that time. The milling machine is believed to come into existence in 17 the century. Milling Machine disadvantages with remedies:.
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