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These are the basic steps used to machine an inside taper on a lathe:
- The required boring bar is inserted into the tool post and the work piece is bored to the smaller size of the taper
- The tool post is set to the required degrees (the boring bar angled towards the work piece)
- Using the tool post slide (or compact slide) hand wheel, it is turned in a counter-clockwise direction to allow enough travel over the entire taper length
- Now the tool tip is moved towards the edge of the workpiece bore with the carriage and cross slide hand wheels
- At this point the tool post slide hand wheel is used and turned in a clockwise direction to start cutting the taper a few millimeters at a time until the taper is roughly 2mm undersize
- Mechanical blue is put onto the mating test piece then the test piece is inserted it into the taper to check if the degrees match. Where there is more rubbing, the tool post degrees are slightly adjusted by using a dial indicator and a note of the adjusted amount set is made.
- Another cut is made and the taper is re-tested using the same method. If it requires further adjustment, the process of adjusting the angle with the dial indicator is repeated and. The dial indicator is placed in the exact same spot as before.
- When the taper matches the test piece, the final cuts are done with a very smooth, continuous motion on the tool post slide hand wheel.
- The workpiece may be retested with test piece after every cut to ensure precision of the final piece.
The above method is just a basic explanation of how the operation is achieved. Operating a lathe without proper training is not recommended and could lead to serious injury!
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What is taper turning on lathe machine?
An operation performed on a lathe that feeds a tool at an angle to the length of the workpiece in order to create a conical shape.
What formula do I use to set the angle on my lathe's tool post to cut a taper from a drawing?
A = Large end diameter of the taper B = Small end diameter of the taper L = Direct distance between A and B Formula: A \ B \ L \ 2 then Invert Tangent = The degrees you set your tool post at.
What causes the lathe machine taper problem?
Taper problems on a lathe can be caused by many things. Below are the most likely possible causes and solutions:Misaligned tail stock- In most cases the tail stock can be realigned with its setting screws- Worn tail stock slides - Send for repairMisaligned Head stock- The head stock can be re-alignedMisaligned bed- The entire machine should be leveled againWorn bed ways- The machine should be sent for regrinding the beds
Who puts a block of steel in a lathe and by grinding cutting to make a machine part?
A turner, machinist or lathe operator.
What is meant by hand wheel in lathe?
The function of the hand wheels on a lathe are to move the various carriages and the quill of a lathe by hand to its required positions.Most lathes have four hand wheels.Carriage hand wheel - For moving the saddleCross slide had wheel - For transverse movement of the tool postCompound had wheel - For moving the compound slide that can be set to an angle for taper cuttingTail stock hand wheel - To move the quill forward and backward for centering or drillingHand wheels on a lathe are connected to a screw which accommodates a nut that is attached to the above-mentioned components thus enabling movement when turned by hand.
