Backup for 04PC by Fanux and AMADAFull description
materi semester 3Deskripsi lengkap
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Information on back pain
"The little book of back pain" contains information about origine, prevention and healing of back pain,gathered from the public domain internet offer. I am not a doctor, nor a medical specialist...
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Haspel-Back
Descripción: Score Get Back Beatles
This booklet is for people who have back pain, as well as family members, friends, and others who want to find out more about it.
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Springback merupakan gaya balik yang ditimbulkan akibat pengaruh elastisitas bahan sheet metal pada proses metal forming dalam hal ini proses bending. Besarnya gaya balik ditentukan oleh nil…Deskripsi lengkap
This is an award winning business plan by the European Union, for the Enterprise fellowship scheme. Business Plan by Syed Masrur, the Founder of the first English speaking Islamic Television Channe...
Springback merupakan gaya balik yang ditimbulkan akibat pengaruh elastisitas bahan sheet metal pada proses metal forming dalam hal ini proses bending. Besarnya gaya balik ditentukan oleh nilai modu...Full description
calibration procedureDescrição completa
excavation procedure
This procedure applies to identification and traceability of material and constructed work under the responsibility of EMC and its Subcontractors at the stages of supply, and installation.
about homaFull description
HYDROTEST PROCEDURE OF HEAT EXCHANGER AT SITE
UAE Arbitration Civil Code Procedure with all Articles of Chapter 3
1. +COPE The purpose of this procedure is to set guidelines for excavation and cutting with gouging process. This procedure describes the recommended practices of Carbon Arc Gouging CAG! and cutting" and provides a general description of components used for the process" and process consumables. /. REFERENCE+ A#$ %&.&' ()&* + $tructural #elding Code , $teel A#$ C*.3' ())) + -ecommended Practice for Air Carbon Arc Gouging and Cutting . PROCEDURE The CAG process reuires a welding power source" a source of compressed air" carbon electrode" and cutting torch. Compressed air is introduced to blow awa/ the molten metal. 0igure & shows the t/pical arrangement for using this process. CAG is used with %C1P reverse polarit/!. The electrode should have a maximum extension of &8) mm from the cutting torch" with the air 2et between the electrode and the worpiece. Although there is no minimum extension" care should be taen to prevent damage to the torch. Therefore 38 to *& mm minimum extension is recommended. Progression should onl/ be in the direction of air ow. The electrode push angle will var/" depending on the operation being performed. The cutter should maintain the correct arc length to allow the air 2et to properl/ remove the molten metal see 0igure (!. Gouging process shall be done b/ sill person. Fi$'re 1 - *)pi3al Arran$e4en or !e Car,on Ar3 Go'$in$ 5CAG
Fi$'re / - 2ow a +an(ar( CAG *or3! 7or8" .1 EEC*RODE+ There are three basic t/pes of electrodes' a. DC 3opper 3oae( ele3ro(e". This t/pe is most widel/ used because of its comparativel/ long electrode life" stable arc characteristics" and groove uniformit/. These electrodes are available in the following diameters' 3" 4" *" 5" 8" &)" &(" &5 and &6 mm. The copper coating improves electrical conductivit/ providing more e7cient" cooler operation and helps maintain electrode diameter at the point of the arc. ,. DC 'n3oae( ele3ro(e". This t/pe has limited use. These
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electrodes are generall/ used in diameters of less than &) mm. %uring cutting these electrodes are consumed more rapidl/ than the coated electrodes. The/ are manufactured the same as the coated electrodes without the copper coating. 3. AC 3opper 3oae( ele3ro(e". These electrodes are made from a special mixture of carbon and graphite with a suitable binder. -are+earth materials are incorporated to provide arc stabiliation for cutting with an alternating current. These electrodes" coated with a controlled thicness of copper. ./ OPERA*ING *EC2NI#UE+ a. Go'$in$. Table & shows suggested current ranges for various electrode t/pes and sies. The electrode is gripped" so that a maximum of &8) mm extends from the cutting torch. The air 2et should be turned on before striing the arc" and the cutting torch should be held as shown in 0igure 3. The torch should alwa/s be operated using the forehand techniue" i.e." the electrode and air 2et pointed in the direction of travel. 9nder proper operating conditions" the air 2et is expected to sweep beneath the electrode end and remove all molten metal. The steadiness of progression controls the smoothness of the resulting cut surface. Fi$'re - Fla Go'$in$ Po"iion
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*a,le 1 - $uggested Current -anges for Commonl/ 9sed 1lectrode T/pes and $ies 1lectrode %iameter
%C1P Polarit/
AC 1lectrode
3
3) , 5)
4
6) , &*)
*
()) , (*)
()) , (*)
5
3)) , 4))
3)) , 4))
8
3*) , 4*)
3(* , 4(*
&)
4*) , 5))
3*) , 4*)
&3
8)) , &)))
*)) , 5))
&5
&))) , &(*)
&6
&(*) , &5))
(*
&5)) , (())
0or gouging in the vertical position" the cutting torch should be held as shown in 0igure 4. Gouging should be done in a downhill direction" which permits gravit/ to assist in removing the molten metal. Gouging in the horiontal position ma/ be done either to the right or to the left" but alwa/s with forehand gouging. :n gouging to the left" the cutting torch should be held as shown in 0igure *. :n gouging to the right" the cutting torch will be reversed to locate the air 2et behind the electrode. #hen gouging in the overhead position" the electrode and torch should be held at an angle that will prevent molten metal from dripping on the cutter;s glove" as shown in 0igure 5.
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The depth of the groove produced is controlled b/ the travel speed. Grooves up to (* mm deep ma/ be made. $low travel speeds produce a deep groove. 0ast speeds will produce shallow grooves. The width of the groove is determined b/ the sie of the electrode used and is usuall/ about 3 mm wider than the electrode diameter. #ider grooves ma/ be made with an electrode that is oscillated with a circular or weave motion. #hen gouging" a push angle of 5* degrees from the surface of the worpiece is used for most applications. A stead/ rest is recommended in gouging to ensure a smoothl/ gouged surface. :t is particularl/ advantageous for use in the overhead position.
,. C'in$. 0igure < shows the electrode in position for cutting. :n general" the cutting techniue is the same as for gouging" except that the electrode is held at a steeper angle= that is" with a push angle between &) and () degrees. #ith the electrode in this position" the metal ma/ then be cut b/ moving the arc up and down through the metal with a sawing motion.
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Fi$'re = > C'in$ wi! CAG
. IN+PEC*ION The free carbon particles are rapidl/ absorbed b/ the melted base metal. :ncreased carbon can lead to increased hardness and possible cracing. $ince this absorption cannot be avoided" to avoid di7culties with carburied metal it is important that all carburied molten metal be removed from the cut surface. Thus" gouging area shall be cleaned b/ grinding and brushing. After grinding" these areas shall be inspected visuall/ for recognie removal all carburied metal. 0ollowing grinding" the preparation shall be full/ inspected visuall/ before the commencement of welding. #here there are visual indications" PT or >P: shall be applied to ensure that the gouging areas are free from defects before welding.
