Machining Time
Machining time is the time when a machine is actually processing something. GeneRally, machining time is the term used when there is a reduction in material or removing some undesirable parts of a material. For example, in a drill press, machining time is when the [...] edge is actually moving forward and making a hole. Machine time is used in other Situations, such as when a machine installs screws in a case automatically.
One of the important aspects in manufacturing calculation is how to find and calculate the machining time in a machining operation. Generally, machining is family of processes or operations in which excess material is removed from a starting work piece by a sharp [...] tool so the remaining part has the desired geometry and the required shape. The most common machining operations can be classified into four types: turning, milling, drilling and lathe work.
Steps
In order to calculate and measure the machining time with a high accuracy, three components must be determined: the speed, feeds, and part dimensions. This leads to introduction of the steps of basic approach to the calculation the machining time:
- Determine the length of the cut.
- Add allowances for approach and over travel if applicable.
- Divide by feed rate, which is the travel speed of the [...] tool in the direction of the length.
The machining time is found by the formula:
$\text{Machining Time} = \frac{\text{length of the cut}}{\text{feed rate} \times \text{rpm}}$
Drilling operation
Drilling time (T) can be calculated by the equation:
$\text{Drilling Time(T)} = \frac{L}{f \times N}$
where;
L is the sum of hole depth approach and over travel distances
f is the feed (mm/rev)
N is the rotational speed (rpm)
References