chapter3.1clamping devices part1

8/13/2019 Chapter3.1clamping Devices Part1

1/20

CLAMPING DEVICES


2/20

What is Clamping?

Once wor piece is locate!" it is necessar# topress it against locating s$r%aces an! hol! itthere against the %orce acting $pon it& 'he tool!esigner re%ers to this action as clamping an!the mechanisms $se! %or this action arenown as clamps &


3/20

Clamping Principles Clamp sho$l! %irml# hol! the wor piece

witho$t !istorting it& Sho$l! o(ercome the ma)im$m possi*le %orce

e)erte! on wor piece *# $sing minim$mclamping %orce

Eas# to operate Vi*rations sho$l! tighten the cams an!

we!ges in the clamp !esign+i% an#, an! notloosen them


4/20

'#pes O% Clamping

Mechanical Act$ation Clamps Pne$matic an! -#!ra$lic Clamps

Vac$$m Clamping Magnetic Clamping Electrostatic Clamping Non Mechanical Clamping Special Clamping Operations


5/20

Mechanical Clamping

.&Screw Clamping

'hese are simple clamps where tor/$e!e(elope! in a screw threa! is $se! to hol!the wor piece& It can *e !irect or in!irect&'here are !i%%erent hol!ing %orces %or !i%%erentscrew si0es&


6/20


7/20


8/20

1&C2Clamps


9/20

3&Strap Clamps

'he *asic operation is same as that o% a le(er& It can*e classi%ie! into 3 *ase! on the position o%wor piece+wor ,"s$pport+%$lcr$m, an! %astenerscrew+e%%ort,&

Strap Clamp $sing 4irst class le(er action Secon! class le(er action 'hir! class le(er action


10/20

3+a,Strap Clamp $sing %irst class le(er action

4$lcr$m is place! *etween wor an! e%%ort


11/20

3+*, Strap Clamp $sing secon! class le(er action

Wor is place! *etween %$lcr$m an! e%%ort


12/20

3+c, Strap Clamp $sing thir! class le(er action

E%%ort place! *etween wor an! %$lcr$m&


13/20

5&Swing Clamp Swing clamp has a screw clamp with swinging arm

that pi(ots on its mo$nting st$!&


14/20

6&Swinging Strap Clamp

'his is a com*ination o% strap clamp an! swinging

clamp& It is $se! in cases where hea(# clampingpress$re is not re/$ire! &


15/20

7&Pi(ote! Clamps

Clamps are o%ten pi(ote! at the centre to simpli%# their

operation& 'ightening an! loosening is !one $sing n$rle!hea! screw&


16/20

8&-inge! Clamp

'his clamp pro(i!es rapi! clearance %orloa!ing an! $nloa!ing the wor piece& It has ahinge! *olt an! hinge! strap9plate whichwhen sw$ng apart gi(es space to mo$nt the

wor piece&


17/20

:&We!ge clamp;

A plain we!ge clamp consists o% amo(a*le incline! plane which %orces thewor piece against a %i)e! stop& 'hese

clamps ten! to loosen $n!er (i*ration&'he taper en! o% the plain we!ge ranges%rom 72: !eg !epen!ing $pon the

coe%%icient o% %riction o% the metal&


18/20


19/20


20/20

chapter3.1clamping devices part1

Documents