Which one of the following machining processes can be used t

Which one of the following machining processes can be used to create a UN 5/8-16 internal thread? a) A tapping process utilizing a 5/8-16 tap in combination with a feed rate of 16 in./rev b) A single point threading process using a 60 degree threading insert and a feed rate of 16 in/rev c) A thread milling process using a 5/8-16 threading insert traversing along a helicoidal path with a helix angle of 1.823 degree d) A tapping process utilizing a 5/8-16 tap in combination with a feed rate of .0625 in./rev e) All of the above Which one of the following is not a material commonly used to coat carbide cutting tool inserts? a) High speed steel b) Aluminum oxide c) Titanium aluminum oxide d) Polycrystalline diamond e) Titanium carbide Which one of the following is not a factor that can potentially influence the topography of a machined surface? a) Scallop marks that naturally arise from the relative rigid body motion between the workpiece and cutting insert b) Surfac

Solution

15) Answer is option C)

16) Ans. Option is A) HSS is cutting tool material.

17).Answer option D).

A build up edge (BUE) is a zone of hardened material close to the cutting edge and can be observed usually at low cutting speeds. As soon as a critical load is reached the BUE breaks away from the rake face/cutting edge. The process of building up and breaking away is repeated several thousand times per second. While doing this, material of the tool can be torn away. Additionally, the BUE can damage the freshly machined surface, when it is pressed under the flank face, due to its increased hardness compared to the work. This may also lead to flank wear.