EPT 282MANUFACTURING PROCESS

11

RINA ERYANI BT MAHALI.111051636.

16 oct 2012

Tuesday.

what is> Reaming.> Tapping.

(o_0)????

Tuesday 16 oct 2012

* Reaming operation is used to:a) make an existing hole dimensionally more accurate that can be achieved by drilling alone.b) improve its surface.

* Most accurate holes in work piece generally produced by:a) centering.b) drilling.c) boring.d) reaming.

REAMING AND REAMERS.Tuesday 16 oct 2012

* A multiple cutting edge tool with straight or helically fluted edges that remove very little material.

* For soft metal, reamers removes a minimum 0.2mm on a diameter of a drilled hole.

* For harder metal about 0.13mm is remove.

* Hand reamers are straight or have a tapered end in first third of their length.

* Various machines reamers are:

- rose reamers.

- fluted reamers.

- shell reamers.

- expansion reamers.

- adjustable reamers.

Reamer.Tuesday 16 oct 2012

* Tapping can produced internal threads.* Tap is a chip producing threading tool with multiple cutting teeth. (available with 2, 3 or 4 flutes.)

* Types taps:1) tapered taps.

- designed to reduce torque required for tapping of through holes.2) bottoming taps.

- for tapping blind holes to their full depth.3) collapsible taps.

- used in large diameter holes.

TAPPING AND TAPS.Tuesday 16 oct 2012

* For higher tapping productivity drilling and tapping can be combined in single operation (drapping) with single tool.

* Tapping can be done by hand or machines such as:a) drilling machines.b) lathes.c) automatic screws machines.d) vertical CNC milling machines.

Tapping

Tuesday 16 oct 2012

Finish.

..Thank you..

Tuesday 16 oct

2012