- What is the turning operation?
- Which type of feed is necessary for the function of the cross slide?
- What is the difference between rough turning and finish turning?
- What is a turning process?
- What is depth of cut?
- What is cut length?
- What is the formula for spindle speed?
- What is feed in lathe machine?
- What position should the feed change lever be placed for a turning operation?
- What is difference between feed and depth of cut?
- How do you calculate feed?
- How do I turn on my thyristor?
- What is necessary condition of turning?
- What is the formula for calculating feed rate?
- What is the formula for calculating rpm?
- What is the difference between facing and turning?
- What are the advantages of turning?
- What is cutting speed formula?
What is the turning operation?
Turning is the removal of metal from the outer diameter of a rotating cylindrical workpiece.
Turning is used to reduce the diameter of the workpiece, usually to a specified dimension, and to produce a smooth finish on the metal..
Which type of feed is necessary for the function of the cross slide?
Explanation: Cross feed is always done perpendicular to the axis of the work as per the classification of carriage movements. Cross feed is done with the help of the cross-slide movement. 6. Which of the following is not true for compound rest?
What is the difference between rough turning and finish turning?
A roughing operation is used to remove large amounts of material rapidly and to produce a part geometry close to the desired shape. A finishing operation follows roughing and is used to achieve the final geometry and surface finish.
What is a turning process?
Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helix toolpath by moving more or less linearly while the workpiece rotates. … Thus the phrase “turning and boring” categorizes the larger family of processes known as lathing.
What is depth of cut?
Depth of Cut (DOC): The measurement. (normally in inches or millimeters) of how wide. and deep the tool cuts into the workpiece. Speed, feed and DOC work together to. determine the Metal Removal Rate (MRR).
What is cut length?
Overall length is easy to decipher, as it is simply the measurement between the two axial ends of the tool. This differs from the length of cut (LOC), which is a measurement of the functional cutting depth in the axial direction and does not include other parts of the tool, such as its shank.
What is the formula for spindle speed?
The following equation is used to cal-culate spindle speed: rpm = sfm ÷ diame-ter × 3.82, where diameter is the cutting tool diameter or the part diameter on a lathe in inches, and 3.82 is a constant that comes from an algebraic simplifica-tion of the more complex formula: rpm = (sfm × 12) ÷ (diameter × π).
What is feed in lathe machine?
The feed of a lathe is the distance the cutting tool advances along the length of the work for every revolution of the spindle. For example, if the lathe is set for a . 020 inch feed, the cutting tool will travel the length of the work . 020 inch for every complete turn that work makes.
What position should the feed change lever be placed for a turning operation?
The lever on the right should be placed directly under the desired feed rate on the index chart. Feed reverse lever – located on the left end of the headstock, this lever reverses the direction of the carriage feed. The lever is squeezed and moved up or down to change the feed direction.
What is difference between feed and depth of cut?
Feed, Speed, and Depth of Cut Cutting speed is defined as the speed at which the work moves with respect to the tool (usually measured in feet per minute). Feed rate is defined as the distance the tool travels during one revolution of the part. … 020 inches depth of cut) run at 600 fpm.
How do you calculate feed?
Formula to determine feed rateFR = the calculated feed rate in inches per minute or mm per minute.RPM = is the calculated speed for the cutter.T = Number of teeth on the cutter.CL = The chip load or feed per tooth. This is the size of chip that each tooth of the cutter takes.
How do I turn on my thyristor?
Device description Thus, a thyristor behaves like a normal semiconductor diode after it is turned on or “fired”. The GTO can be turned on by a gate signal, and can also be turned off by a gate signal of negative polarity. Turn on is accomplished by a “positive current” pulse between the gate and cathode terminals.
What is necessary condition of turning?
Following conditions must be satisfied for turning-on SCR with gate signal: The first and most important condition is that, SCR must be forward biased. This means that the anode voltage should be more than the cathode voltage. In other words, anode voltage should be positive with respect to cathode voltage.
What is the formula for calculating feed rate?
The term “feeds” refers to the feed rate, or the relative linear speed between the tool and the workpiece. For example, for drilling, it is the speed at which the drill bit travels down into the workpiece material. The equation for the feed rate is: feed Rate = RPM * chip load * number of teeth.
What is the formula for calculating rpm?
Motor RPM Calculation Examples For a 60 Hz system with four poles, the calculations to determine RPM would be: (Hz x 60 x 2) / number of poles = no-load RPM. (60 x 60 x 2) / 4. 7,200 / 4 = 1,800 RPM.
What is the difference between facing and turning?
The generation of surfaces oriented primarily perpendicular to the workpiece axis are called facing. In turning, the direction of the feeding motion is predominantly axial with respect to the machine spindle. In facing a radial feed is dominant.
What are the advantages of turning?
Advantages of turning are: Good surface finish. It requires less energy and strength than other processes. Collecting chips is easier….Turning also has disadvantages .Most defects are inaccuracies in a feature`s dimensions or surface roughness.Limited to rotational parts.Significant tool wear.
What is cutting speed formula?
When maximum speed of the machine spindle less than value of recommended milling conditions…Maximum Speed of the Spindle SpeedSpindle Speed of Recommended Milling Conditionsn min-1÷n1 min-1