for the assembly line has been used widely by people,and the installing an assembly line is a long term and a costly decision,so it should be master form designing to operating.In this the equipments are laid out according to the sequence of operations that must be performed on the raw material to convert it into the finished product.

the assembly line is know as simple assembly line balancing problem which can be clasified by its servels parts.

1.the simplestraight line

2.the complex assembly line

servers factor of assembly line are involved.

first factorperation time

second factor:following tasks

third factor:ranked positional weight

For some building and repair projects, welding cutting torch is the best tool to use for cutting steel to size and shape. welder should know how to set up a cutting torch and how to use welding cutting torch.

set up a cutting torch steps 1:ensure the safety

the safety is a important for cutting torch,when welding the metal,it can produce flames and spatter and give off extreme heat,so welder should wear shield equipment for body safety,or it will cause your body or hand injury.

set up a cutting torch steps 2:set up the torch and inspection

Grab the torch set and give it a quick inspection to make sure the valves work and are not loose.we can use a methods to make sure the tanks under pressure that it  allowed a small hiss of gas to escape.

set up a cutting torch stops 3:light the torch

when welder performs all work with adherence to safety procedures,and then welder can light the torch and adjust it in good condition which is in 1/8 inch.the cutting torch is starting.

of course how to install welding machine ,i think that operator can see.nothing to add to that.

welding symbols are used on welding machine operation for welder who should master the welidng symbols which are used on a drawing to specify where weld are to be located.

the welding symbols consists of an arrow line ,a tail and a reference line which has different meanings for for describing the type of weld, its size, and other processing and finishing information.

the arrow line connects the reference line to joint or area to be welded.The tail of the welding symbol is used only when necessary to include a specification, process, or other reference information. the direction of arrow is a signficance of reference line.All things are interrelated and interact with each other.

Reference Line must always be horizontal, Arrow points to the line or lines on drawing which clearly identify the proposed joint or weld area,and arrow connects reference line to arrow side member of joint or arrow side of joint.

The tail of the welding symbol is used to indicate the welding or cutting processes, as well as the welding specification, procedures, or the supplementary information to be used in making the weld. These symbols have been stan­dardized by the welding  procedures operation.

 orginal from welding symbols

An assembly  line is a type of industrial production in which prefabricated.the assembly line has basic or compelex part.

the basic assembly line consists of conveyor line.it is easy to make it very very achievable which carries the production through a stations reaching the end.the complex consists of feeder line to carry the production,along with the other equipment ,for example cars.

the principle and skill of assemly line,operator should be master.The assembly line was first used on a large scale by the meat-packing industries of Chicago and Chincinnati during the 1870s.the steps of assembly line has several parts.

assembly line step 1,the sequence

the sequence in which a product's component parts are put together must be planned and actually designed into the process.

assembly line step 2,conveyor line

when you finish the step 1,the component passes form station to station by conveyor.then by the last station,the product is assemblyed.

assembly line step 3,make sure the quality

the produce pass the station,the system should make sure that the good quality goods are produced.and we've got to pay more attention to profitability and cost control.

the orginal from assembly line step

welder can have trouble about thicker metal or thin metal how to weld.General the thicker metal use a large wire,ever a large machine,the smaller wire and the lower amperage welding machine for the thinner metal.

the size of wire has different size for welding machine,for auto body sheet metal,the  115V mig welders are great to run .023 wire.and then the .035 bare wire has been used which cant get a best production.because the best setup is.023 bare wire with argon or co2 gas.for the .035 dont fit the thin metal.Personally, I have never had an issue with getting hot enough with .035 wire which will just make more spatter and will generally look like Fido's ass.

the thickness of metal is different,the methods is different.for thick steel or stainless, welder figure stick that could probably stick weld one inch plate with 200 amps, use 5/32 inch rod, just use multiple passes.

the thicker or thin metal are  welded ,the amps is a important factor,how to control the amps.because the strength of amps can affect the welding thickness.the large wire weld OK until welder can get to an area where the mig welding gun change.

orginal source:best welding tips

accidents  frequently  occur  in  welding  operations, so welder should take proper precautions to avoid the things.in many instances,the safety precaution is important for welding machine operation,the accidents often occur because of a lack of protective equipment and safety consciousness.

the equipment should be familiar for welder,a variety of specialized clothing and equipment is available for safety precaution.

1.Face shields

Face  shields  should  be  used  when  there  is  a  potential  for splashing, spattering or spraying of chemicals or solutions to the face. you can see the thing when welder start weld the steel.face shield can protect welder body to aviod face harm.

2.Safety glasses and goggles

The bright light can damage the eye,so welder should wear safety glasses and goggles for eyes healthy.Safety  glasses  must  comply  with  the standard set by the National Standards Institute. Eye protection should be worn when · making solutions · distributing solutions from one container to another · changing solutions on equipment.

3.Gloves and Masks

To avoid permeation,it is important to wear the right glove for proper protection.The welder knows how important protective welding clothing is which is why we've weared welding gloves to protect hands.masks should be worn when weighing out powders.for the mask protects against organic solvent fumes.

4.welding coats and sleeves

the coats can be wear when welder operates the welding to prevent contact with dirt and minor chemical splashes.sleeves are disposable garments worn to protect the arms.

original article :welding safety precaution

Assembly technology is constantly being developed, refined and researched to provide the most cost-effective and efficient solutions to manufacturing problems.Assembly Automation's content includes some parts,but it  is not restricted,so that engineers and managers can gain immediate advantages on their own assembly lines.

1.artificial intelligence for assembly

Artificial intelligence is primarily concerned with symbolic representations of knowledge and heuristic methods of reasoning, that is, using common assumptions and rules of thumb.artificial intelligence for assembly is largely experimental, with small patches of mathematical theory. In artificial intelligence, the basic paradigm of intelligent action is that of search through a space of partial solutions for a goal situation.

2.compliant mechanisms

compliant mechanisms are flexible mechanisms that transfer an input force or displacement to another point through elastic body deformation.Since the compliant mechanisms are single-piece structures, there is no need of assembly.

3.joining technologies

Some of the joining techniques that have been implemented include remote laser welding, resistance braze spot welding, single sided spot welding, and tandem mig welding.

4.manufacturing control systems

Protecting manufacturing automation and control systems computer environments is absolutely critical. Protecting manufacturing automation and control systems computer environments is absolutely critical.

5.robot assembly stations etc

Robot assembly is only effective if the robot’s flexibility is used to best advantage.  Additionally, peripheral devices supporting the robot must also be adaptable to handle a wide variety of products and product parts.
of course,the modular assembly systems and machie vision are importion for assembly line.the robot assembly stations is achieved by using equipment that is ont designed specifially to handld a particluar type of part with minor modifications to tooling.

we know ,the assembly automation has a good deal of assembly content.for example,modular assembly systems,parts feeders and parts presentation,rapid prototyping,parts feeding, flexible gripping,machine vision,inspection design for assembly.

so the assembly automation has some knowdelge which we should master.