How does crimping work?
in [Repair]
|
From: Dave Plowman (News) on 30 Nov 2009 10:11 In article <00b33d3e$0$12335$c3e8da3(a)news.astraweb.com>, Sylvia Else <sylvia(a)not.at.this.address> wrote: > After having had a bad experience trying to crip a lug some years ago, I > recently faced the need to do this again. So I bought a moderately > expensive ratchet based crimping tool. And, rather to my surprise, it > actually works. Having the correct crimp tool is essential for good results. -- Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: F Murtz on 30 Nov 2009 11:33 Dave Plowman (News) wrote: > In article<4b13c243$1(a)dnews.tpgi.com.au>, > F Murtz<haggisz(a)hotmail.com> wrote: >> Usually the conductor is the same metal as the lug, it will have the >> same memory so if it is all squished it should stay there.Expanding and >> contracting in use at the same rate. (maybe) > > Most connectors are brass - to give more strength. Cable usually copper. > crimp lugs are usually copper for copper wire
From: Sjouke Burry on 30 Nov 2009 11:42 Sylvia Else wrote: > The obvious answer is that you bend the metal of the connector so that > it holds the wire in place. > > This doesn't seem very satisfactory. Metal always retains some > flexibility, even when bent beyond its yield point. No matter how hard > you squeeze, there'll be some rebound when you release the pressure, > which should result in a loose joint. > > After having had a bad experience trying to crip a lug some years ago, I > recently faced the need to do this again. So I bought a moderately > expensive ratchet based crimping tool. And, rather to my surprise, it > actually works. > > But that doesn't answer the question of how. > > Sylvia. The crimp wire squishes the corners of the pin so intensely, that a gas-tight connection forms, 4 for each winding. That makes a very reliable connection. But only if you do the wrap correctly.
From: Dave Plowman (News) on 30 Nov 2009 12:56 In article <4b13f3e6$1(a)dnews.tpgi.com.au>, F Murtz <haggisz(a)hotmail.com> wrote: > Dave Plowman (News) wrote: > > In article<4b13c243$1(a)dnews.tpgi.com.au>, > > F Murtz<haggisz(a)hotmail.com> wrote: > >> Usually the conductor is the same metal as the lug, it will have the > >> same memory so if it is all squished it should stay there.Expanding > >> and contracting in use at the same rate. (maybe) > > > > Most connectors are brass - to give more strength. Cable usually > > copper. > > > crimp lugs are usually copper for copper wire Perhaps lug means some special terminal in the US? But most of the crimped terminals you come across - like say in a car or computer - are brass, but sometimes plated. -- *If you're not part of the solution, you're part of the precipitate * Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: PeterD on 30 Nov 2009 13:26
On Mon, 30 Nov 2009 17:56:29 +0000 (GMT), "Dave Plowman (News)" <dave(a)davenoise.co.uk> wrote: >In article <4b13f3e6$1(a)dnews.tpgi.com.au>, > F Murtz <haggisz(a)hotmail.com> wrote: >> Dave Plowman (News) wrote: >> > In article<4b13c243$1(a)dnews.tpgi.com.au>, >> > F Murtz<haggisz(a)hotmail.com> wrote: >> >> Usually the conductor is the same metal as the lug, it will have the >> >> same memory so if it is all squished it should stay there.Expanding >> >> and contracting in use at the same rate. (maybe) >> > >> > Most connectors are brass - to give more strength. Cable usually >> > copper. >> > >> crimp lugs are usually copper for copper wire > >Perhaps lug means some special terminal in the US? > >But most of the crimped terminals you come across - like say in a car or >computer - are brass, but sometimes plated. Cite a reference. |