Lathe Machine
The shop where most of the work performed on different machines are called machine shop. In the machine shop, the raw material is cut, machined, formed or shared with the help of a machine. Different machines used in the machine shops.
1.Lathe Machine
2.Shaper Machine
3.Milling Machine
4.Planning Machine
5.Drilling Machine
6.Grinding Machine
7.Threading Machine
lathe machine introduction
The lathe machine is a power mechanical device in which the work is held and rotated against a suitable cutting from a cutting tool for producing the cylindrical form in the metal, wood or any other machineable material.
The principle of lathe machine is that it holds the work between two strong sports called as a center or in a cheek or face plate which revolves.T he chuck of the center is mounted on the main spindle of the machine. The cutting tool is rigidly supported in a tool port and it is feed against the rotating job. The job rotate in its axis and the tool is moved either parallel to an inclination with its axis such as a cylindrical or tapered surface is produced
Lathe machine main part operation and working
Bed
The bed is the function of a lathe machine it is spotted on board box column and is made of cast iron. it consists of two heavy metals slides running lengthwise with ways unit which is mounted on the bed are the headstock, tailstock and the carriage.
Watch this video for Parts of lathe machine in detail
Headstock
It spots the main spindle in the bearing and aligns it properly. It also houses necessary transmission mechanism with speed changing liver to obtain different speeds.T he cone Pulley or gear should be used to change the speed of the spindle. Holding device which is mounted on headstock spindle.
Three jaws chuckFour jaws chuckFaceplateCollet ChuckMagnet chucklathe dog
Main spindle
In a hollow cylindrical shaft and the long cylindrical job can passes through the main spindle. The spindle end facing the tailstock is called spindle nose. The spindle nose has a morse taper hole and Threads on the outside. The Morse taper is used to accommodate center or collet chuck or threaded portion of the chuck.
Tailstock
It is a movable part locating opposite to headstock on the way of the Bed. It is capable of sliding along the bed maintaining its alignment with the headstock. On medium size and small lathe it is moved along the bed manually, where are heavier lathes it is moved by hand wheel through a pinion that meshes with a rack provided in front of a lathe bed. It is used for four purpose
1. To support free end during machining
2. To hold a tool for performing an operation like drilling reaming tapering
3.To Centre the job and the tool before any lathe operations
4. To help in the operation of taper turning by tailstock set over method
Carriage
It is located between headstock and tailstock. It can slide along bed guide-way and can be locked at any position by tightening the carriage lock screw.It consists of flowing main parts
Apron
It is fastened to the saddle. it consists of gear and clutches for transmitting motion from feed rod and handwheel to the careers. Also, split nut which engaged with the lead screw during threading.T he clutches mechanism is used to transmit motion from feed rod wheres the split nut along with the lead screw move the carriage during thread cutting.
Saddle
It is made up of H shaped casting. It aids saddle to slide on bed guideway by operating handwheel.
Compound Rest
It sports the tool post and cutting tools in its various position.It may be swiveled on the cross slide to any angle in the horizontal plane.
Cross Slide
It provides with a female dovetail on one side and assembled on top of saddle having a male dovetail.
Tool post
It is used to hold various tool holder and tools. Types of tool post commonly used
Ring and Rocker tool post
Square head tool post
Quick change tool post
Legs
They are a sport which carries an entire load of the Machines. The left leg act as a housing for the motor the pulley and the countershaft at the same time that right leg act as a housing or the coolant tank, pump, and the connecting pipes
lathe machine specification
Length of the bed
Distance between centers
The diameter of the work which can be turned between the ways
The height of the centers Swing over carries
Lathe machine operations
Facing Rough turning
Shouldering Radius turning
Necking Taper turning
Thread cutting Forming
Chamfering Knurling
Drilling Boring
Countersinking Counterboring
