Jump to content

DONT STAY LURKING AS A GUEST,

JOIN TEF AND BENEFIT FROM MEMBERSHIP:

CLICK HERE TO JOIN.
Emily Alice Llewellyn

Studying NC Welding and fabrication

Recommended Posts

Emily Alice Llewellyn

Hello, I have just recently started my NC course. We have questions to work through but the way they are written I find hard to understand. I was hoping if someone could help answer or guide me in the right direction.  I have 3 questions I need help with

 

Explain why it is important to use a fixed common reference point for dimensioning of drawings and sketches

 

Explain how to use other sources of information to support the data (such as electronic component pin configuration specifications, standard reference charts for limits and fits, tapping drill reference charts, bend allowances required for material thickness, electrical conditions required for specific welding electrodes, mixing ratios for bonding and finishing materials, metal finishing specifications and inspection requirements)

 

Describe the need to ensure that sketches are of a suitable size, use appropriate drawing conventions, are in proportion and are legible to others.

 

Thank you, any help is appreciated :)

Share this post


Link to post
Share on other sites
phil d

Hi, I think you'd be better off trying a welding forum, this is for electricians, and matters pertaining to electrical installation, not welding and fabrication.

Share this post


Link to post
Share on other sites
roys

Phil is right, but I think most of us could have a good stab at the answers, however before we would do that the general way it works is that, you try to answers the questions first, posting up here your answers then we will try and help.

Good luck with course.

Edited by roys
Additional comment.

Share this post


Link to post
Share on other sites
binky
6 hours ago, Emily Alice Llewellyn said:

 

 

Explain why it is important to use a fixed common reference point for dimensioning of drawings and sketches

 

Explain how to use other sources of information to support the data (such as electronic component pin configuration specifications, standard reference charts for limits and fits, tapping drill reference charts, bend allowances required for material thickness, electrical conditions required for specific welding electrodes, mixing ratios for bonding and finishing materials, metal finishing specifications and inspection requirements)

 

Describe the need to ensure that sketches are of a suitable size, use appropriate drawing conventions, are in proportion and are legible to others.

 

Thank you, any help is appreciated :)

well past my apprentice days, but rough answers are along the following lines:-

 

1/ If you measure from a single fix point it avoids compound errors. Every time you measure a dimension, there will be a small error (how small depends on accuracy of the measuring device), so if you measure, for example, 10mm, then from that point measure another 10mm, and repeat 10 times and the error each time is 0.1mm, then 10 x 0.1mm gives a tolerance band of + or - 1mm. If you measure from one fixed point the same 10mm spaces, then potential error remains as 0.1mm giving a tolerance band of +or - 0.1mm.

 

2/ part of answer is in the Zeus book (I am assuming they still give out the infamous Zeus book) which contains lots of standard limits and fits. These basically are short hand for tolerances, you may see such things as H5, S4 - it's all about measuring and producing work that will meet the designers specifications for size, shape, fit and function.

 

3/ Again all about conveying the above information in  a standard format on a piece of paper (drawing) you can read. 

 

Hope that is some use.

Share this post


Link to post
Share on other sites
Blue Duck

@apprentice87 is a welder is he not? 

 

Share this post


Link to post
Share on other sites
Andy™

no, he's a 5DW blacksmith

Share this post


Link to post
Share on other sites
apprentice87
3 hours ago, Blue Duck said:

@apprentice87 is a welder is he not? 

 

 

certainly am...

 

john..

 

2 hours ago, Andy™ said:

no, he's a 5DW blacksmith

 

Apparently!!!

 

john..

Share this post


Link to post
Share on other sites
apprentice87

tango'd bollock... i just typed a load of stuff and it dissapeared....

 

Share this post


Link to post
Share on other sites
apprentice87

 

12 hours ago, Emily Alice Llewellyn said:

 

I give up it just did it again... i will write something tomorrow

 

Share this post


Link to post
Share on other sites
kerching
16 hours ago, Andy™ said:

no, he's a 5DW blacksmith

So,what do,they do for the other 4 days.....

 

 

 

:pmsl1:

Share this post


Link to post
Share on other sites
apprentice87

Shut up!!!!

 

john...

Share this post


Link to post
Share on other sites
binky

smile and the whole world smiles with you @apprentice87  :slap

Share this post


Link to post
Share on other sites
kerching
9 minutes ago, binky said:

smile and the whole world smiles with you @apprentice87  :slap

...or you can look like you are on some form of "register"

Share this post


Link to post
Share on other sites
apprentice87

I am on a register!! [of sorts!!] What did they call it.. Hmm. errr... ahh!! "Certified" that is what it was!!!

 

john..

Share this post


Link to post
Share on other sites
kerching

I have worked with a few folk who should be certified.......and more than a few customers

Share this post


Link to post
Share on other sites
Tony S

I was coded, does that count?

Share this post


Link to post
Share on other sites
apprentice87

Not quite the sort of certified i meant, but i suppose anyone that would choose to spend most of their time with their head in a bucket needs a certificate of some sort!

 

john..

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



FORUM SPONSORS

Electrical Test Equipment
Test Meter Calibration
Manufacturers
Electrical & Tool Suppliers
Electrical Software
Green & Renewables
Label Supplies
Accounting Software
Education & Training
Motoring
To Advertise and become a Forum Sponsor of

talk.electricianforum.co.uk, please

contact the Administrator

Here Thank You.




×