📘 ❞ اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO OXY/ACETYLENE WELDING AND CUTTNG ❝ كتاب

الهندسة الميكانيكية - 📖 ❞ كتاب اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO OXY/ACETYLENE WELDING AND CUTTNG ❝ 📖

█ _ 0 حصريا كتاب اللحام القطع بالأكسي استيلين AN INTRODUCTION TO OXY ACETYLENE WELDING AND CUTTNG 2024 CUTTNG: والقطع استيلين page 2 of 1 3 Introduction Oxygen Acetylene welding, or “Gas Welding”, is a pr ocess which relies on combustion oxygen and acetylene When mixed together in correct proportio ns within hand held torch blowpipe, hot flam e produced with temperature about 3,200°C The c hemical action the oxy acetylene flame can be ad justed by changing ratio volume to ac etylene, using valves blowpipe Equipment Oxy equipment portable easy use It comprises gases stored under pressure steel cylinders should fitted regulators, control flow Flexible hoses are used connect regulators or Specially designed safety devices, called traps “Flashback Arrestors” between regulators Flashback arrestors prevent flames generated by 'flashback' from reaching cylinders Flashbacks A flashback rapid, high pressure travelling back up the gas hoses, caused welding cutting at incorrect settings, blockage overheating nozzle (for example operating nozzle too close material) Flashbacks result extremely dangerous cylinder ignition must prevented proper of working Arrestors Lighting Up Procedure To begin cutting, open cylinder slowly means key (s) Do not suddenly there may serious damage regulator possibility an acciden t Open valve spindles one turn only Op en fuel control a djust regulator give (see chart page 13), this ensures that any air ox ygen purged hose Repeat procedure for oxygen side Light suitable sparklighter m aking sure right a ngles Do liquid igniters (such as cigare tte lighters) vapour combination Reduce increase supply blow pipe until just ceases smoke Slowly via control white inner cone s harply defined merest trace haze now correctly adjusted الهندسة الميكانيكية مجاناً PDF اونلاين قسم خاص بكتب للتحميل مجال الميكانيكية" Mechanical engineering" والتي هي فرع هندسي يدرس الأنظمة الفيزيائية ويطبق أسس القوانين الفيزيائية الأساسية لتحليلها وإن أهم ما يميز علم الميكانيكا اعتماده على الرياضيات (بدلاً من التقدير) وعلى التجربة (بدلاً الملاحظة) حيث كيفية صياغة التنبؤات الكمية نظرياً وكيفية اختبار هذه الصياغات الرياضية بأدوات قياس مصممة بعناية و ايضا فرع هندسي يهتم بتصميم وتصنيع وتشغيل وتطوير الآلات أو الأجهزة المستخدمة مختلف قطاعات النشاطات الاقتصادية وبتعريف الموسوعة البريطانية فإن فروع تهتم بالتصميم والتطوير وبالتصنيع وبالتركيب المحركات والآلات وعمليات التصنيع وهي مهتمة بشكل بالقوى والحركة وهو علم بدراسة الطاقة بكافة صورها وتأثيرها الأجسام تخصص واسع له علاقة بكل مجالات الحياة فالهندسة تتعلق مثلا بصناعات الفضاء والطيران وبالإنتاج وتحويل وميكانيكا الأبنية والنقل وتكنولوجيا تكييف الهواء والتبريد وفي النمذجة والمحاكاة المعلوماتية A special section books field mechanical engineering, "Mechanical engineering", engineering branch studies physical systems applies foundations basic laws analysis most important characteristic mechanics its dependence mathematics (rather than estimation) experience observation), where it established how formulate quantum predictions theory, test these mathematical formulas carefully measurement tools "Mechanical concerned design, manufacture, operation, development machines devices various sectors economic activities By definition British Encyclopedia, development, installation, operation engines, machines, manufacturing processes particularly interested forces movement science studying energy all forms effects objects broad discipline related areas life Mechanical with, example, aerospace, aviation, production, transformation, building mechanics, transportation, conditioning refrigeration technology, information modeling simulation

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اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO  OXY/ACETYLENE  WELDING AND CUTTNG
كتاب

اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO OXY/ACETYLENE WELDING AND CUTTNG

اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO  OXY/ACETYLENE  WELDING AND CUTTNG
كتاب

اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO OXY/ACETYLENE WELDING AND CUTTNG

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عن كتاب اللحام و القطع بالأكسي استيلين AN INTRODUCTION TO OXY/ACETYLENE WELDING AND CUTTNG:
اللحام والقطع بالأكسي استيلين

page 2 of 1
3
Introduction
Oxygen/Acetylene welding, or “Gas Welding”, is a pr
ocess which relies on combustion of oxygen and
acetylene. When mixed together in correct proportio
ns within a hand-held torch or blowpipe, a hot flam
e is
produced with a temperature of about 3,200°C. The c
hemical action of the oxy/acetylene flame can be ad
justed
by changing the ratio of the volume of oxygen to ac
etylene, using the valves on the torch or blowpipe.
Equipment
Oxy/acetylene equipment is
portable and easy to use. It
comprises oxygen and acetylene
gases stored under pressure in
steel cylinders. The cylinders
should be fitted with regulators, to
control the pressure and flow of
gases. Flexible hoses are used to
connect the regulators to the torch
or blowpipe. Specially designed
safety devices, called flame traps
or “Flashback Arrestors” are fitted
between the hoses and the
regulators. Flashback arrestors
prevent flames generated by a
'flashback' from reaching the
cylinders
Flashbacks
A flashback is a rapid, high-
pressure flame travelling back up
the gas hoses, caused by welding
or cutting at incorrect pressure
settings, or from blockage or
overheating of the nozzle (for
example by operating with the
nozzle too close to the material)
Flashbacks can result in extremely
dangerous cylinder ignition and
must be prevented by proper use
of working Flashback Arrestors.
Lighting-Up Procedure
To begin oxygen/acetylene welding or cutting, open
the
cylinder valves slowly by means of the cylinder key
(s).
Do not open suddenly or there may be serious damage
to the regulator and the possibility of an acciden
t.
Open the cylinder valve spindles one turn only. Op
en the fuel gas control valve on the blowpipe and a
djust the
regulator to give the correct working pressure (see
chart on page 13), this ensures that any air or ox
ygen is
purged from the hose. Repeat the procedure for the
oxygen side.
Light the gas by means of a suitable sparklighter m
aking sure that the sparklighter is held at right a
ngles to the
nozzle. Do not use liquid igniters (such as cigare
tte lighters) as the vapour/gas combination can be
dangerous.
Reduce or increase the acetylene supply to the blow
pipe valve until the flame just ceases to smoke.
Slowly increase the oxygen via the blowpipe control
valve until the white inner cone in the flame is s
harply
defined with the merest trace of an acetylene haze.
The blowpipe is now correctly adjusted


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