LATHE OPERATIONS - OD - LESSON 1/TASK 1 precise lead screw for threading operations. It comes equipped with precision accessories such as a collet. Machining Operations and Part Geometry shape: (a) thread cutting on a lathe, and (b) slot milling •Performed on a machine tool called a lathe. •Variations of. Turning & Related Operations. • Turning – a machining process in which a single -point tool remove material from the surface of a rotating work piece. (Lathe).
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without use of an operator. It requires very less attention after the setup has been made and the machine loaded. ➢ Turret Lathe. Turret lathe is the. thoroughly familiar with the lathe and its operations to accomplish the repair and for all lathe operations, such as turning, boring, drilling, reaming, producing. lathe is a dual head machine where the work remains fixed and the heads move this type of lathe is that different machining operations such as drilling.
The headstock spindle is a hollow cylindrical shaft that provides a drive from the motor to work holding devices.
Gear Box: The quick-change gear-box is placed below the headstock and contains a number of different sized gears. Carriage: The carriage is located between the headstock and tailstock and serves the purpose of supporting, guiding and feeding the tool against the job during operation.
The main parts of carriage are: a.
22 Different Types of Lathe Machine Operations
The saddle is an H-shaped casting mounted on the top of lathe ways. It provides support to cross-slide, compound rest and tool post. The cross slide is mounted on the top of saddle, and it provides a mounted or automatic cross movement for the cutting tool.
The compound rest is fitted on the top of cross slide and is used to support the tool post and the cutting tool. The tool post is mounted on the compound rest, and it rigidly clamps the cutting tool or tool holder at the proper height relative to the work centre line. The apron is fastened to the saddle and it houses the gears, clutches and levers required to move the carriage or cross slide. The engagement of split nut lever and the automatic feed lever at the same time is prevented she carriage along the lathe bed.
Tailstock: The tailstock is a movable casting located opposite the headstock on the ways of the bed. Cutting on the Return Pass If you crank the tool back towards you after it reaches the center of the work piece you will notice that it removes a small amount of metal on the return pass. This is because the surface is not perfectly smooth and it is removing metal from the high spots.
If you need to remove a lot of metal, to reduce the work piece to a specific length, for example, you can take advantage of this return cut to remove more metal on each pass by advancing the tool a small ways into the work piece on the return pass. Cutting on the Return Pass STEP 5. The Finishing Cut Depending on how rough the end of the work piece was to begin with and how large the diameter is, you may need to make 3 or more passes to get a nice smooth finish across the face.
These initial passes are called roughing passes and remove a relatively large amount of metal. When you get the face pretty smooth you can make a final finishing cut to remove just.
The Finishing Cut Turning is used to reduce the diameter of the work piece, usually to a specified dimension, and to produce a smooth finish on the metal. Often the work piece will be turned so that adjacent sections have different diameters. Measuring the Diameter STEP 1. Chucking the Work piece A work piece such as this which is relatively short compared to its diameter is stiff enough that we can safely turn it in the three jaw chuck without supporting the free end of the work.
For longer work pieces we would need to face and center drill the free end and use a dead or live center in the tailstock to support the work piece.
Lathe Machine: Parts, Operations
Insert the work piece in the 3-jaw chuck and tighten down the jaws until they just start to grip the work piece. Rotate the work piece to ensure that it is seated evenly STEP 1. Chucking the Work piece Adjusting the Tool Bit Choose a tool bit with a slightly rounded tip. This type of tool should produce a nice smooth finish. For more aggressive cutting, if you need to remove a lot of metal, you might choose a tool with a sharper tip. Make sure that the tool is tightly clamped in the tool holder.
Adjusting the Tool Bit Adjust the angle of the tool holder so the tool is approximately perpendicular to the side of the work piece. Because the front edge of the tool is ground at an angle, the left side of the tip should engage the work, but not the entire front edge of the tool.
Advance the cross slide crank. Turn the carriage hand-wheel counterclockwise to slowly move the carriage towards the headstock. As the tool starts to cut into the metal, maintain a steady cranking motion to get a nice even cut. Turning with Hand Feed It's difficult to get a smooth and even cut turning by hand. STEP 4: Turning with Power Feed Turning with power feed will produce a much smoother and more even finish than is generally achievable by hand feeding.
Power feed is also a lot more convenient than hand cranking when you are making multiple passes along a relatively long work piece.
When cutting under power, you must be very careful not to run the tool into the chuck. This seems to happen to everyone at one time or another, but it can shatter the tool and damage the chuck and will probably ruin the workpiece. Turning with Power Feed It is important to recognize that, in a turning operation, each cutting pass removes twice the amount of metal indicated by the cross slide feed divisions. This is because you are reducing the radius of the work piece by the indicated amount, which reduces the diameter by twice that amount.
Therefore, when advancing the cross slide by. It should be self-evident that you should never attempt to measure the work while it is in motion.
It may cause an accident. STEP 5: Frequently, holes will need to be drilled using the lathe before other internal operations can be completed, such as boring, reaming, and tapping.
Although the lathe is not a drilling machine, time and effort are saved by using the lathe for drilling operations instead of changing the work to another machine.. Before drilling the end of a work piece on the lathe, the end to be drilled must be spotted center- punched and then center- drilled so that the drill will start properly and be correctly aligned.
Cutting Fluid Preparing to Drill Before drilling you need to make sure that the drill chuck is firmly seated in the tailstock. Lock the tailstock to the ways, then thrust the chuck firmly back towards the tailstock to firmly seat the arbor in the Morse taper of the tailstock.
Insert the center drill in the jaws of the tailstock chuck and tighten the chuck until the jaws just start to grip the drill. The goal is to make the drill as stiff as possible. Preparing to Drill You only need a few drops at a time, so a small can should last for a longtime.
That reduces heat time and make the drilling work easy STEP 2: STEP 3.
Introduction To Lathe machine operation
This is as far as you need to go with the center drill since its purpose is just to make a starter hole for the regular drill.
Back the center drill out and stop the lathe. Drilling the Hole Remove the center drill from the chuck and insert a regular drill and tighten it down in the chuck. Place a few drops of cutting fluid on the tip of the drill, then start the lathe and drill into the work piece as before, at to RPM. After advancing the drill about twice its diameter, back it out of the hole and use a brush to remove the metal chips from the tip of the drill.
Add a few more drops of cutting fluid if necessary, then continue drilling till required length.
Drilling the Hole Unless you are drilling completely through a fairly short work piece you will generally need a way to measure the depth of the hole so that you can stop at the desired depth. There are two commonly used methods 1. By simple depth gauge 2. Using depth gauge is common and easy while graduated scale method is used often because These are not easy to see ….
Measuring Drilling Depth This tapering operation has wide range of use in construction of machines. Almost all machine spindles have taper holes which receive taper shank of various tools and work holding devices.
By a taper turning attachment. By the help of forming tool A broad nose tool having straight cutting edge form tool is set on to the work at half taper angle, and is fed straight into the work to generate a tapered surface. In this method the tool angle should be properly checked before use.It carries the headstock and tail stock for supporting the workpiece and provides a base for the movement of carriage assembly which carries the tool.
STEP 1: Raja Kushwaha September 28, i am intreated in lathe machine.
Lathe machine operations holding the work by a chuck Lathe machine operations performed by holding the work by a chuck or a faceplate or an angle plate are: Drilling Drilling is the operation of producing a cylindrical hole in a workpiece. Legs: The legs carry the entire load of machine and are firmly secured to floor by foundation bolts. This type of tool should produce a nice smooth finish.
The main parts of carriage are: a. How to crack the wifi password. It moves back and forth to give depth of cut to the metal specimen by using hand wheel.
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