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Join Date: Apr 2016
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Product Assembly, Pre-Forming Screws and Bolts

04/23/2016 4:35 PM

Is there way of pre-forming screw and washer sets fast via a mechanical or electrical device. I work in production assembly assembling up to a 100 products by hand and have to sit there getting screw and washer sets ready.

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Guru
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#1

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 4:46 PM

You might look for flange-head types of screws with serrated undersides that eliminate the need for washers.

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#2
In reply to #1

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 4:49 PM

That seems the obvious answer. There are several varieties of flanged or screw-with-washer type fasteners. Perhaps it's cost prohibitive after the math is done?

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Guru
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#3
In reply to #2

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 5:09 PM

It may depend on how cheap any local elves are.

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Guru

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#4

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 5:17 PM

You could probably build something like this....
http://www.google.com/patents/US5864937

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Guru

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#5

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 5:19 PM

Or a vison system to assure that the two joined parts are correct.

The two parts would be joined by feeding accumulator bins with the proper screws/washers and using vibrator feeding and mating system.

Depends on management and volumes.

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Power-User

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#6

Re: Product Assembly, pre-forming screws and bolts

04/23/2016 10:29 PM

You can buy SEMS screws with the washer pre-assembled and captive.

Apart from the obvious (Fastenal) here's one of many suppliers of SEMS screws:

http://www.conceptfasteners.com.au/shop/category/fasteners-inserts-screws-rivets-grippers-double-washer-assembly-screws

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Guru
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#7

Re: Product Assembly, Pre-Forming Screws and Bolts

04/24/2016 11:33 AM

For over 100 years, automobile manufacturers have found it less expensive to spot weld vehicles together than to use hardware.

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Guru

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#8
In reply to #7

Re: Product Assembly, Pre-Forming Screws and Bolts

04/24/2016 1:52 PM

Yes, but you can't unscrew a spot weld.

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Guru
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#9
In reply to #8

Re: Product Assembly, Pre-Forming Screws and Bolts

04/25/2016 9:54 AM

Yes you can, you just need enough torque to overcome the shear resistance of the weld.

Or were you looking at a way to 'unscrew' the spot weld that does not also fall under the description of 'breaking' the parts?

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#11
In reply to #7

Re: Product Assembly, Pre-Forming Screws and Bolts

05/08/2016 2:15 PM

Provided that the assembly has NOT to be disassembled.

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Guru

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#10

Re: Product Assembly, Pre-Forming Screws and Bolts

05/06/2016 8:02 PM

Without any expense, could you use a feed shoe for the washers, with possibly a small feed roll underneath; and for the bolts, a "tramway" slide holding the heads? (like T bolts sit in a slot) Aligned, the 2 feeds - the bolts could stand vertical under the washer feed and with some adjustment they would probably drop onto the bolts?

Hope this helps. jt.

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