The heat flux ( ? ) penetrating the grinding wheel and workpiece depends mainly on the cutting speed ( v s ) and cutting force ( F c ).
32.
In one study, scientists performed experiments that evaluated the cutting speed, quality of sectioned tissue, tissue chilling capability, specimen stabilization, and the size limitation of specimens to be cut.
33.
For a given material there will be an optimum cutting speed for a certain set of machining conditions, and from this speed the spindle speed ( RPM ) can be calculated.
34.
From 1935 to 1955 machining cutting speeds increased from 120 200 ft / min to 1000 ft / min due to harder cutting edges, causing machining costs to fall by 75 %.
35.
The annular cutters have less teeth and less wear, therefore with an annular cutter holes can be made at higher or faster cutting speed and a faster feed rate of the drilling machine.
36.
The forces during machining are dependent on depth of cut, feed rate, cutting speed, tool material and geometry, material of the work piece and other factors such as use of lubrication / cooling during machining.
37.
He also ran 400 experiments on metal-cutting speeds, gave out printed instructions for various tasks, offered a higher piece-rate to men who made a daily quota and broke up the traditional foreman's post into five jobs.
38.
Saw blade type and number of teeth, cutting speed, and feed rate all must be appropriate to the type and size of material being cut, which must be mechanically clamped to prevent movement during the cutting process.
39.
Some materials, such as machinable wax, can be cut at a wide variety of spindle speeds, while others, such as stainless steel require much more careful control as the cutting speed is critical, to avoid overheating both the cutter and workpiece.
40.
This results in 15-30 % higher cutting speed, ( depending on thickness of material being cut ) less dross, minimum kerf angle, and longer lifetime of both the electrodes and the nozzles while extending the life torch itself due to lower generated heating effect.
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