CARBON STEEL

CARBON STEEL

When ingots and bars are rolled to rod or sheet, the process can be done hot or cold. Cold rolled steel, or CRS, is often specified for deep drawn and stamped parts.

Cold rolled steels with high carbon content, over 0.55%, are strong but not very ductile. They are best used for springs and strong wire.

Used in Deep Draw
The most common steel sheet products for deep drawing are the cold rolled mild steels, which have better surface quality, mechanical properties and formability.

Cold Rolled (CRS) Carbon Steels such as AISI / SAE 1008 and 1010 are the steels most commonly used. (Experience shows that these two are interchangeable and the 1010 may be used if the1008 alloy is unavailable). Many of these parts are relatively low cost to begin, but need to be plated afterwards to protect against corrosion during storage or use.

Heat-treating
Heat-treating carbon steel changes its ductility, hardness, yield strength and impact resistance. It also changes its electrical and thermal conductivity. Depending on the part and its future use, we may stamp easily formable low alloy carbon steel, which is later heat-treated to change its mechanical properties. In other cases we would not stamp low-carbon steel unless it is already heat-treated, or we might recommend using high carbon steel, depending on a number of electrical and chemical considerations

Steel Numbering
There are 14 basic types of carbon and alloy steels specified by a numbering system that is shared by AISI and SAE. These types run from Carbon steel, such as 1010, to the higher alloy Nickel-Chrome-Moly series steels, like 4310, and Chromium steels, like 5130.
The second two digits in this system, 10XX, represent the decimal percent of carbon in these alloys: 1010 has 0.10 % carbon. The stainless steels are in another steel series.

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G12 Example using I (Finished Radius)

G12 Example using I 
(Finished Radius)
 

O0010 ;

T1 M06 ;

G90 G54 G00 X1.0 Y1.0 ;

S1500 M03 ;

G43 Z0.1 H1 M08;

G12 Z-0.5 I0.4 D01 F15. ;

G00 Z0.1 M09 ;

G28 G91 Y0 Z0 ;

M30 ; 
 

Only one pass is required for this example, so there is only an I value (circle radius) in the G12 line. G12 will use conventional rather than climb milling 

We want to mill a 0.8diameter 0.5” deep pocket using a 0.5endmill. The picture shows the tool path for the code given.

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Overview

Overview

Traditionally, CAM has been considered as a numerical control (NC) programming tool, wherein two-dimensional (2-D) or three-dimensional (3-D) models of components generated in CAD software are used to generate G-code to drive computer numerically controlled (CNC) machine tools. Simple designs such as bolt circles or basic contours do not necessitate importing a CAD file.

As with other “Computer-Aided” technologies, CAM does not eliminate the need for skilled professionals such as manufacturing engineers, NC programmers, or machinists. CAM, in fact, leverages both the value of the most skilled manufacturing professionals through advanced productivity tools, while building the skills of new professionals through visualization, simulation and optimization tools.

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Product Lifecycle

Product lifecycle

Computer-Aided Design is one part of the whole Digital Product Development (DPD) activity within the Product Lifecycle Management (PLM) process, and as such is used together with other tools, which are either integrated modules or stand-alone products, such as:

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The Times They Are A-Changin’ (Bob Dylan) & What is Truth? (Johnny Cash)


Here is something to ease our anxiety about EXAMS! 

oops, …. Now, enjoy!



What is Truth? (Johnny Cash) 

The old man turned off the radio
Said, "Where did all of the old songs go 
Kids sure play funny music these days 
They play it in the strangest ways" 
Said, "it looks to me like they've all gone wild 
It was peaceful back when I was a child" 
Well, man, could it be that the girls and boys 
Are trying to be heard above your noise? 
And the lonely voice of youth cries "What is truth?" 

A little boy of three sittin' on the floor 
Looks up and says, "Daddy, what is war?" 
"son, that's when people fight and die" 
The little boy of three says "Daddy, why?" 
A young man of seventeen in Sunday school 
Being taught the golden rule 
And by the time another year has gone around 
It may be his turn to lay his life down 
Can you blame the voice of youth for asking 
"What is truth?" 

A young man sittin' on the witness stand 
The man with the book says "Raise your hand" 
"Repeat after me, I solemnly swear" 
The man looked down at his long hair 
And although the young man solemnly swore 
Nobody seems to hear anymore 
And it didn't really matter if the truth was there 
It was the cut of his clothes and the length of his hair 
And the lonely voice of youth cries 
"What is truth?" 

The young girl dancing to the latest beat 
Has found new ways to move her feet 
The young man speaking in the city square 
Is trying to tell somebody that he cares 
Yeah, the ones that you're calling wild 
Are going to be the leaders in a little while 
This old world's wakin' to a new born day 
And I solemnly swear that it'll be their way 
You better help the voice of youth find 
"What is truth"
 

The Times They Are A-Changin' (Bob Dylan) 

Come gather 'round people 
Wherever you roam 
And admit that the waters 
Around you have grown 
And accept it that soon 
You'll be drenched to the bone. 
If your time to you 
Is worth savin' 
Then you better start swimmin' 
Or you'll sink like a stone 
For the times they are a-changin'. 

Come writers and critics 
Who prophesize with your pen 
And keep your eyes wide 
The chance won't come again 
And don't speak too soon 
For the wheel's still in spin 
And there's no tellin' who 
That it's namin'. 
For the loser now 
Will be later to win 
For the times they are a-changin'. 

Come senators, congressmen 
Please heed the call 
Don't stand in the doorway 
Don't block up the hall 
For he that gets hurt 
Will be he who has stalled 
There's a battle outside 
And it is ragin'. 
It'll soon shake your windows 
And rattle your walls 
For the times they are a-changin'. 

Come mothers and fathers 
Throughout the land 
And don't criticize 
What you can't understand 
Your sons and your daughters 
Are beyond your command 
Your old road is 
Rapidly agin'. 
Please get out of the new one 
If you can't lend your hand 
For the times they are a-changin'. 

The line it is drawn 
The curse it is cast 
The slow one now 
Will later be fast 
As the present now 
Will later be past 
The order is 
Rapidly fadin'. 
And the first one now 
Will later be last 
For the times they are a-changin'.
 

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Job postings results from Home Depot

Great news!! There are new positions available at The Home Depot. Based on the criteria provided us, students of Jane Campus might be interested in the following new job opportunities.

These jobs matched the criteria specified for: Jane Campus Student Jobs

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