reaming n tapping
TRANSCRIPT
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