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ABRICATION O MOTORISED
PUNCHING MACHINE
Submitted in the partial fulfillment of the requirement for the award
DIPLOMA IN MECHANICAL ENGINEERING
SUBMITTED BY:
1. D. VADIVEL 4. K. VIMAL KUMAR
2. G. MOHANAM 5. A. VENKATESAN
3. K. ANBU 6. P. SARAVANAN
Under guidance of
S.N. SUNDAR, M.E.
N!EMBE" #$%$
DEPARTMENT OF MECHANICAL ENGINEERING .
A.M.K TECHNOLOGICAL POLYTECHNIC COLLEGE
CHENNAI 602103
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A.M.K TECHNOLOGICAL POLYTECHNIC COLLEGE
CHENNAI- BANGALORE ROAD
SEMBARAMBAKKAM
CHENNAI 602103
BONAFIDE CERTIFICATE
Thi& i& to certif' that thi& (ro)ect wor* on
+FABRICATION OF MOTORISED PUNCHING MACHINE,
&ubmitted b' -------- -----. "eg. No. -----
in partial fulfillment for the award of
DIPLOMA IN MECHANICAL ENGINEERING
Thi& i& the bonafide record of wor* carried out b' him under our &uper/i&ion
during the 'ear #$%$
Submitted for the !i/a0/oce e1am held on -----..
2..D ("3E4T 5UIDE
INTE"N67 E86MINE" E8TE"N67 E86MINE"
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ACKNOWLEDGEMENT
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ACKNOWLEDGEMENT
6t the out&et9 we would li*e to empha&ie our &incere than*& to the
(rincipal Mr. R.. K!MAR" M.E.F.I.E" M.I.S.T.Efor encouragement and
/aluable ad/ice.
we than* our E&quired 2ead of Department Mr. R. RAK!MAR" M.E.for
pre&enting hi& felication& on u&.
;e are grateful on our Entourage& Mr. S.N. S!NDAR" M..E.
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CONTENTS
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CONTENTS
426(TE" N. TIT7E
%. INT"DU4TIN
#. SYN(SIS
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?. B3E4TI!ES
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A. 4NST"U4TIN
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%%. 4ST ESTIM6TIN
%#. 4N47USIN
%=. BIBI75"6(2Y
%?. (2T!IE;
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INTROD!CTION
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INTROD!CTION
Thi& pro)ect concentrate& on pro/iding de&cription& of all the ba&ic
operating principle& and de&ign of &olar cell.
In our technical education the pro)ect wor* pla'& a ma)or role. E/er'
&tudent i& put in to &imulate life particularl' where the &tudent required
bringing hi& *nowledge9 &*ill and e1perience of the pro)ect wor*.
It help& how to e/ol/e &pecification& under gi/en con&train& b'
&'&tematic approach to the problem a con&truct a wor* de/ice. (ro)ect wor*
thu& integrate& /ariou& &*ill& and *nowledge attainment during &tud' and
gi/e& orientation toward& application.
6& the &tudent& &ol/e the /ariou& problem& e1po&ed b' the pro)ect
wor*9 the &tudent& get the confidence to o/ercome &uch problem& in the
future life. It help& in e1panding the thin*ing and alternati/e& for future
application&.
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SYN(SIS
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SYNOPSIS
(re&& wor*ing technique& utiliing large quantitie& of economical
tooling equipment de&ign and it quic*l'9 accuratel' and economicall' cold
wor*ing of mild &teel and other ductile material&. The component produced
range o/er an e1tremel' wide field and i& u&ed throughout indu&tr' foreconomical production of quantitie& of pre&&ing con&ideration ha& to be
gi/en to the rate of production. The co&t of the pre&& tool to be emplo'ed .
(re&& ma' be defined a& the chip le&& manufacturing proce&& b' which
/ariou& component& are made from &heet. Mo&tl' pre&& u&e fabricated part&
of incite &hape with thin wall&. It u&e& large force b' pre&& tool& far &hort
time inter/al
which re&ult& in cutting a &haping the &heet metal . In the earl' da'&9 metal
forming pre&& u&e &imple cran* and le/er mechani&m that con/ert rotating
motion into linear motion with the help of punchFram. The rotating motion
achie/ed b' motor and linear motion achie/ed b' punch or ram9
punch applied on wor*piece .
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SCOPE ANDIMPORTANCE OF
PROECT WORK
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SCOPE AND IMPORTANCE OF PROECT WORK
Enable& to &how the intrin&ic *nowledge of the indi/idual.
Enable& to de/elop the abilit' of the de&igning and de/eloping factor&
and it& application&.
Enable& to induce the collection of technical data and other related
&tandard data from the wor*.
Enable& to appl' the technique& of method &tud' and time &tud'.
Enable& to ha/e a complete *nowledge of the particular wor* which
the' ha/e de&igned and fabricated.
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OBECTI#ES
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OBECTI#ES
The following are the main ob)ecti/e& of our pro)ect
To pro/ide Smart hole and good bore fini&h.
To manufacture /ariou& &ie& of punch machine.
Un&*illed 7abour i& &ufficient
To co/er more area with minimum con&umption of operational time.
To impro/e entrepreneurial &*ill&
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SELECTION OF
PROECT
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SELECTION OF PROECT
Modern indu&trie& and bu&ine&& e&tabli&hment ha& become /er'
comple1 and competiti/e in ma*ing up of machine& ba&ed on their own
*nowledge and &*ill.
;e preferred to ma*e the motoried punching machine9 which i&
&imple in con&truction and de&ign. It can be u&ed in &mall &cale indu&trial9
dome&tic and pla' ground.. Thi& unit require onl' %#!D4 electrical
power..
Mo&t of them prefer for machine with le&& co&t and more life. The
(unching machine i& made up of mild &teel material and coated with
primer. The unit can ea&' to operate and i& harmle&& to people who ma*e&
them and al&o who u&e& them.
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CONSTR!CTION
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CONSTR!CTION
Thi& unit con&i&t& of
%G rotating cran*
#G D4 Motor with built in &peed reduction gear
bo1
=G "otating &haft with plummer bloc* &upport
?G M.S.
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DC M$%$r &'%( )*'+% ', // r/*%'$, /r )$4
Thi& D4 motor i& &hunt t'pe %#! D4 motor. Thi& motor i& ha/ing built
in t'pe &peed reduction gear bo1 unit. It ha& high torque and low &peed
capacit'. The electrical &uppl' to the motor i& from %# ! D4 power &uppl'.
The D4 Motor dri/e& the chain wheel and gene/a wheel mechani&m.
http://www.globalspec.com/datasheets/2353/AlliedMotionTechnologies/46F2F292-6B04-4195-A266-E98405FCE0EA -
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Cr,5 , $,,/%', r$ /(,'7
6 cran*&haft ha& one Hor moreG off&et &ection& where a connecting rod i&
attached r$*,it. The connecting rod mo/e& bac*0and0forth Hor up0and0
downG ONCEfor e/er' rotation of the cran*&haft. The cran* will alwa'&
mo/e in a circle9 mo/ing the connecting rod in a &mooth &ine wa/e li*e
motion. The power can flow in either direction. That i&9 the cran*&haft can
dri/e the connecting rod9 or the connecting rod can dri/e the cran*&haft.
3.Fr/ S%,
Thi& ba&e frame &tand made in #@mm 1#@ mm 1 =mm M.S. l angle and i&
u&ed to hold the entire mechani&m and &upport the motor al&o.
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PRINCIPLE OF DC MOTOR
6 D4 motor i& a dc machine wor*ing a& a motor to con/ert dc
electrical energ' into mechanical energ' HdcG motor are /er' commonl' u&ed
in car&9 truc*&9 aircraft&9 etc. The' are al&o u&ed in large rating&9 where wide
range of &peed control i& nece&&ar'.
;hen a conductor i& carried a current and in l'ing in magnetic filed.
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RATINGS OF MOTOR
Motor& are rated b' their /oltage9 current draw9 output &peed9 and torque.
O/r%', #$+%/
Operating voltage&pecifie& the nominal HnormalG /oltage the manufacturer
recommend& for the motor. Mo&t &mall D4 motor& are de&igned for %.@ to %#
/olt operation9 with the ma)orit' in the =0A /olt range. 7arger D4 motor&
de&igned for hea/'0dut' application& u&uall' require %# to #? /olt&9 with
&ome needing upward& of $ /olt&. ften9 but not alwa'&9 the higher the
/oltage9 the more powerful the motor Hthi& doe& not appl' to &tepper motor&9
where /er' low /oltage& on the order of )u&t a few /olt& are common
for hea/'0dut' motor&G. Mo&t motor& can be run at operating /oltage& higher
or lower than the &pecified rating.
7ower /oltage& reduce torque and &peed.
2igher /oltage& increa&e torque and &peed.
HNote:
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Current drawi& the amount of current9 &pecified in milliamp& or amp&9 that
the motor require& to produce a certain amount of torque. Motor& con&ume
different amount& of current depending on how the' are operated:
No-load. 6 motor that doe&nJt ha/e an'thing attached to it& &haft
i&nJt doing an' wor*9 and i& &aid to be free0running. No0load current
tend& to be /er' low.
Load. 6& the motor doe& wor*9 it& load and current draw increa&e&.
Manufacturer& rate the current draw under load u&ing different
&tandard&9 ma*ing it hard to )udge a motor u&ing thi& &pecification
alone.
Stalled. ;hen the motor &haft &top& rotating9 it +&tall&, and draw& a&
much current a& will flow through the winding&. Thi& &pecification i&
u&eful for +wor&t ca&e &cenario, engineering planning.
Shorted. Ma1imum current flow& into the motor when the coil& are
&horted out. The motor will not run9 and li*e an' &hort circuit9 if
operated in thi& wa' for an' length of time9 &eriou& damage can re&ult
to other &'&tem& on the robot.
T$r8*/
Torque i& the wa' the &trength of the motor i& mea&ured. It i& t'picall'
calculated b' attaching a le/er to the end of the motor &haft9 and a weight or
gauge on the end of that le/er. The length of the le/er u&uall' depend& on theunit of mea&urement gi/en for the weight. E1ample&:
Metric mea&urement& u&e Newton meter& HNmG9 *ilogram&0force
meter& H*gf0mG9 or &ometime& gram0centimeter& Hgm0cmG.
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Standard mea&urement& u&e ounce0inche& Ho0inG9 or pound0feet Hlb0
ftG9 or pound0inche& Hlb0inG. ItJ& common to re/er&e the nomenclature
and call it foot0pound& and inch0pound&.
S//
Thespeedof the motor indicate& how fa&t it& &haft i& turning. D4 motor&
without a gearbo1 &pin at =9$$$ to o/er %#9$$$ "(M Hre/olution& per
minuteG. ;ith a gear bo19 the &peed can /ar' from under % "(M9 on up.
Stepping motor& are not rated in "(M9 but pul&e& Hor &tep&G per &econd. The
&peed of a &tepper motor i& a function of the number of &tep& required toma*e one full re/olution9 time& the number of &tep& applied to the motor
each &econd. T'pical /alue& are #$$ or =$$ ((S.
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WORKING PRINCIPLE
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WORKING PRINCIPLE
The machine i& &eated without an' /ibration.
The machine can ma*e punching without gi/ing much effort..
The cutting die placed at the connecting rod which i& reciprocated
b' the cran* wheel b' the motoried dri/e.9
;hen the motor i& rotated 9 the cran* wheel i& rotated and hence
the punching die with connecting rod al&o mo/ed.
The machine i& mo/ed on the )ob.
During it& mo/ement the connecting rod with the die are forced
on the )ob to ma*e punch.
The hole i& cut b' the die &et and the )ob i& remo/ed.
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MAIN PARTS AND
DESCRIPTION
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MAIN PARTS AND DESCRIPTION
%. B6SE
#. D"UM ;IT2 B76DE
=. B6SE (76TE
?. M6IN S26NI
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DESCRIPTION OF THE
COMPONENT
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DESCRIPTION OF THE COMPONENT
BASE
Ba&e i& the foundation of the machine9 which with&tand& the /ibration
of the machine and tran&mit& it to the ground. It hold& the machine part&. It
ha& the pro/i&ion for holding the ba&e plate. Two trolle' wheel i& fi1ed to
the ba&e.
BASE PLATE
It i& the bac*bone of the machine. It i& mounted to the main &haft b'
mean& of the plummer bloc*..
MAIN SHAFT
The &haft mu&t ha/e &ufficient thic*ne&& to a/oid bending9 due to hea/'
load and /ibration&. The' &upported o/er the ba&e b' mean& of the &lee/e.
The pulle' i& fi1ed to the main &haft that tran&mit& the power to the ba&e
plate b' mean& of ! belt dri/e tran&mi&&ion.
#-BELTS
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! belt i& a mechanical member that i& to tran&mit the motion from
one to another pulle'. It i& made up of a hardened rubber. ! belt i& u&ed
becau&e of it& le&&er &lippage and high ten&ion.
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DESCRIPTION OF
MECHANICAL PRESS
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CLASSIFICATION OF PRESS
6ccording to IS C$A?:#$$# &tandard KL9 pre&& cla&&ified into two principle
categorie& a& h'draulic pre&&e& which operate on the principle of h'dro&tatic
pre&&ure. Mechanical pre&& which utilied *inematic lin*age of element& to
tran&mit power. Mechanical pre&& can be al&o cla&&ified into ba&i& of the
de&ign of the frame.
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3. ST!DY OF 300T AND 900T PRESS
("ESS :0
6 machine ha/ing a &tationar' bed and a &lideH"amGwhich ha&
controlled reciprocating motion toward& and awa' from the bed
&urface and at right angle to it. The &lide being guided in the frame
of the machine to gi/e a definite path of the motion.
6rbor:0
6 manual or power operated pre&& u&ed to force arbor& or mandrel&into or out of hole& and for &imilar a&&embl' or di&a&&embl'
operation&.
6rch :06 &mall cran* pre&& ha/ing itJ& column& a& upright& wider
&lide flange9 left to right between the column& or to permit larger
&tri*e length&.
6utomatic:0
6 pre&& in which the wor*9 either &eparate part& or &tri*e or &heet
&toc*9 i& fed through the pre&& in &'nchroni&m with the pre&&
operating c'cle and b' mean& other than manual.
Bench :0
6n' &mall pre&& of a &ie to be mounted on a bench or table. The&e
pre&&e& are almo&t alwa'& gap frame and ma'be fi1ed or inclinable.
Bottom dri/e :0
6n' pre&& with the dri/e mechani&m located within or under the
bed. connection& of the dri/e to &lide or &lide& are within or
along&ide the upright.
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476SSI
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6d/antage& include low co&t high &peed and minimum
maintenance.
ST"U4TU"E < ("ESSES:0
(re&&e& are a/ailable in &e/eral different de&ign&. The t'pe& include
permanentl' upright pre&&e&9 &uch a& ad)u&table bed
&tationar'H6DSG9open bac* &tationar' pre&&e&9 permanentl' inclined
pre&&e&9 open bac* inclinable pre&&e&. The inclined pre&&e& often
facilitate feeding and permit fini&hed &tamping& to fall out b'
gra/it' or be blown out b' air at the rear of the pre&&. 4rop frame
pre&&e& are made with either one or two point& of &u&pen&ion.
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&election of a pre&& include &ie 9 force 9 energ' and &peed
requirement&. The pre&& mu&t be capable of e1erting force in the
amount 9 location 9 direction 6& well a& for the length of time
needed to perform the &pecified operation&. ther con&ideration&
mu&t include the &ie and geometr' of the wor*piece&. peration&
to be performed9 no of wor*piece& to be produced9 production rate
needed 9 accurac' and fini&h requirement& 9 equipment co&t& and
other factor&.
(re&& &peed& :0
(re&& &peed i& relati/e from that /arie& with point of reference.
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(re&& integrated with material handling equipment9 feeding and
unloading de/ice& and other manufacturing equipment.
TY(ES <
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The ma1imum &pace or an' part of the ma1imum &pace within a
pre&& for mounting a die.
Dwell :0
6 portion of the pre&& c'cle during which the mo/ement of the
member i& ero or at lea&t in&ignificant. U&uall' refer& to the
internal when the blan* holder in a drawing proce&& i& holding the
blan* while the punch i& ma*ing the draw.
Eccentric gear :0
6 main pre&& dri/e gear within an eccentric a& an integral part. The
unit rotate& about a common &haft with the eccentric tran&mitting
the rotar' motion of the gear into the /ertical motion of the &lide
through a connection.
Eccentric &haft :0
6 cran* with a cran* )oin of &uch &ie that it contain& or &urround&
the &haft. The eccentric with itJ& connection i& u&ed in the eccentric
pre&& and i& al&o u&ed for dri/ing au1iliar' attachment& &uch a& lift
out& and feed&.
Eccentric draw :0
The ma1imum limit& of forming depth which can be accompli&hed
with the multiple action pre&&e&.
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when the inner &lide begin& itJ& dwell0&ometime& called ma1imum
draw or ma1imum depth of draw.
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The &tationar' part of a pre&& &er/ing a table to which i& affi1ed a
bol&ter9 or &ometime& the lower die directl'.
Bol&ter plate :0
6 plate attached to the top of the pre&& bed for locating and
&upporting the die a&&embl'. It u&uall' ha& hole& a& &lot& for
attaching the lower die or die &hoe. Mo/ing bol&ter plate& on &elf
powered for tran&ferring die& in and out of the pre&& for die
&etting .6l&o called rolling bol&ter&9 the' ma'be integral with or
mounted to a carriage. The' are not to be confu&ed with &liding
bol&ter&9 the purpo&e of which i& mo/ing the lower die in and out of
the pre&& for wor*piece feeding.
4apacit'9pre&& :0
The rated pre&& force that a pre&& i& de&igned to e1ert at a
predetermined di&tance abo/e the bottom of the &tro*e of the &lide.
4lutch :0
6 coupling mechani&m u&ed on a mechanical pre&& to couple the
fl'wheel to cran*&haft9 either directl' or through gear train&.
4u&hion :0
6n acce&&or' for a pre&& which pro/ide& a re&i&ti/e force with
motion required for &ome operation&9 &uch a& blan* holding 9
drawing or redrawing9 maintaining uniform pre&&ure on a
wor*piece and *noc*ing out or &tripping or al&o called pad& or
)ac*&. 6lthough u&uall' mounted in or under the pre&& bed. The'
are al&o u&ed in or on the &lide.
(ower :0
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6 term u&ed loo&el' to de&ignate an' pre&& u&ing electrical power a&
compared to manual power.
Single action :0
6 pre&& with the &ingle action.
"am &lide :0
Shut height :0
The di&tance from the top of the bed to bottom of the &lide of a
/ertical pre&&9 with &tro*e down ad)u&tment up9 on mo/ing bol&ter
pre&&e&9 or &hut height i& mea&ured from the top of the bol&ter
Hwhen the bol&ter i& integral with carriageG or the top of the carriage
when the bol&ter i& &eparate.
Slide :0
The main reciprocating member of pre&&9 guided in the pre&& frame
to which the punch or upper die i& fa&tened. Sometime& called the
ram. The inner &lide of a double action pre&& i& called the plunger or
punch holder &lide. The outer &lide of a double action pre&& i& called
the blan* holder &lide. The third &lide of a triple action pre&& i&
called the lower &lide9 and the &lide of a h'draulic pre&& i& often
called the platen.
Slide operation :0
The di&tance between the face of the die mounting &urface of the
inner &lide and the outer &lide of multiple action pre&&e& at open
po&ition.
Stro*e :0
The di&tance between the terminal point& of the reciprocating
motion of a pre&& &lide.
Stro*e& per minute :0
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The &pecified continuou& running &peed of a pre&&. It i& not the no
of permi&&ible &ingle tripling of a pre&& and con&equentl' doe& not
mea&ure the po&&ible production per min9 e1cept when a pre&& i&
running continuou&l'. The no of &ingle tripling per min /arie& with
different t'pe& and ma*e& of clutche& a& well a& with the de1terit'
of the operator.
Top &top :0
6 machine generated &ignal for &topping a pre&& at the
top of a &tro*e.
4US2INS :0
Die 4u&hion :0
Die cu&hion often and more accuratel' referred to a& pre&&ure pod& 9
are u&ed to appl' pre&&ure to flat blan*& for drawing operation&.
The' al&o &er/e a& lift out or *noc* out de/ice& to remo/e
&tamping& from the die&.
(neumatic cu&hion& :0
In cu&hion& of thi& t'pe 9the ma1imum pre&&ure i& controlled b' the
diameter and no of c'linder& and a/ailable air pre&&ure. Shop line
pre&&ure i& generall' u&ed9 but it i& po&&ible to u&e a boo&ter or
inten&ifier to increa&e the air pre&&ure. 6 pneumatic die cu&hion for
a &ingle point pre&& normall' u&e& one c'linder and one pi&ton. Two
ore more cu&hion& ma'be placed on top of one another9 howe/er
when a high capacit' unit i& required in a limited bed area in which
a /ertical &pace i& a/ailable.
7UB"I46TIN :0
"ole of lubrication :0
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cau&e pre&& wor*ing problem&9 if improperl' &pecified. 7ubricit'
agent& function under all temperature condition& but are lea&t
effecti/e below @$ degree < H%$ degree 4G and abo/e %#$$ < HA?
4G. fat i& a good lubricit' additi/e H &ince it i& attracted to mo&t
metal &urface& and doe& not &tain metalG
("ESS S6
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4'linder mu&t incorporate mean& to pre/ent failure of capabilit'
H&udden lo&& of pre&&ureG
6ir controlling equipment mu&t be protected again&t foreign
material and water entering the pneumatic &'&tem.
Mean& of air lubrication whene/er needed.
Emergenc' &top O deacti/ate the clutch control and acti/ate the
bra*e to &top.
(re&& component& mu&t al&o be de&igned9 &ecured or co/ered to
minimie haard& cau&ed b' brea*age 9 loo&ening and failing or b'
relea&e of mechanical energ'Hin ca&e of brea*ing &pringG
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?$$TNNE9 ST"6I52T SIDED9 noc* Bar& C$mm
Bol&ter Table %C$$1%#$$
2ole& for cu&hion Bol&ter %$1A no&
(4D 4u&hion pin& %@$pcd
Ma1imum Shut height from table
Surface
#$$mm
SD6U HShut down ad)u&tment upG %@$mm
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SPECIFICATION OFC!SHION
Die cu&hion @T
Stro*e of Die 4u&hion %#@mm
IFD of e)ector pin 2ole& in Bol&ter ?$mm
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%G =$$ T (re&&
=$$TN9ST"6I52T SIDED9
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SIN57E 5E6"ED9
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ELECTRICAL
CIRCUIT DETAILS
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POWER S!PPLY !NIT
INTROD!CTION;
6ll the electronic component& &tarting from diode to Intel I4J& onl'
wor* with a D4 &uppl' ranging from P@! to P%#!. ;e are utiliing for the
&ame9 the cheape&t and commonl' a/ailable energ' &ource of #=$!0@$2
and &tepping down9 rectif'ing9 filtering and regulating the /oltage.
STEP DOWN TRANSFORMER;
;hen 64 i& applied to the primar' winding of the power tran&former9
it can either be &tepped down or &tepped up depending on the /alue of D4
needed. In our circuit the tran&former of #=$!F%@0$0%@! i& u&ed to perform
the &tep down operation where a #=$! 64 appear& a& %@! 64 acro&& the
&econdar' winding. 6part from &tepping down /oltage&9 it gi/e& i&olation
between the power &ource and power &uppl' circuitrie&.
RECTIFIER !NIT;
In the power &uppl' unit9 rectification i& normall' achie/ed u&ing a
&olid &tate diode. Diode ha& the propert' that will let the electron flow ea&il'
in one direction at proper bia&ing condition. 6& 64 i& applied to the diode9
electron& onl' flow when the anode and cathode i& negati/e. "e/er&ing the
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polarit' of /oltage will not permit electron flow. 6 commonl' u&ed circuit
for &uppl'ing large amount& of D4power i& the bridge rectifier. 6 bridge
rectifier of four diode& H? 1 IN?$$G are u&ed to achie/e full wa/e
rectification. Two diode& will conduct during the negati/e c'cle and the
other two will conduct during the po&iti/e half c'cle9 and onl' one diode
conduct&. 6t the &ame time one of the other two diode& conduct& for the
negati/e /oltage that i& applied from the bottom winding due to the forward
bia& for that diode. In thi& circuit due to po&iti/e half c'cle D% Q D# will
conduct to gi/e $.C! pul&ating D4. The D4 output ha& a ripple frequenc' of
%$$2. Since each alteration produce& a re&ulting output pul&e9 frequenc'
# 1 @$ 2. The output obtained i& not a pure D4 and therefore filtration ha&
to be done.
The D4 /oltage appearing acro&& the output terminal& of the bridge
rectifier will be &omewhat le&& than $R of the applied rm& /alue. Normall'
one alteration of the input /oltage will re/er&e the polaritie&. ppo&ite end&
of the tran&former will therefore alwa'& be %C$ degree out of pha&e with
each other.
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FILTERING CIRC!IT;
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LIST OF MATERIALS
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LIST O MATERIALS
Sl. No. 4M(NENT M6TE"I67 U6NTITY
No.
%. 4"6N>0 (76TE MI7S STEE7 %
#. D4 MT" #?!D4 %
=. 5ENE!6 ;2EE7 MI7D STEE7 %
?. S(IND7E HS26 46ST I"N #
1. CHAIN DRIVE MECHANISM STEEL
1
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SAFETY,CARE AND
MAINTENANCE
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SAFETY,CARE AND MAINTENANCE
B/:$r/ *', %(/ (',/" $/ $: %(/ $',% %$ )/ ,$%/ :$r :/%