Electronics Forum | Wed Nov 18 05:21:18 EST 1998 | jack coia
Please could anyone give me any relative information concerning shear tests on the leads of SMD ICs. thanks in advance.
Electronics Forum | Tue May 23 20:39:37 EDT 2000 | Dave F
Scott: Sounds like fun: � Solder joint strength in pull/shear varies with lead geometry, solder volume, lead metal/metallization, and the test method. � Among things, IPC-TM-650 talks to getting pads off-of boards. For instance: Method 2.4.8 is for
Electronics Forum | Mon Feb 18 08:56:44 EST 2008 | operator
It does exist. We used to have one here, but sold it. It was more of a manual process though. You put the assembled board on the work table and then set your cutting blade height. Then you manually moved the cutting blade around shearing off the TH l
Electronics Forum | Fri Oct 23 16:19:14 EDT 1998 | Dave f
| I have been requested to explore the possibilities of using an inline lead trimmer in our manufacturing process. I have a few questions I need answered. | 1. Can anyone recommend a good model of trimmer for in-line use? | 2. We do double sided SMT,
Electronics Forum | Tue Oct 05 12:29:28 EDT 2010 | mikesewell
It is possible to infer that the lead is lifted based on the toe fillet appearance, but it's not as reliable as say a laser or xray inspection. This is usually done by varying the light source location and or color and looking at the images resultin
Electronics Forum | Thu Dec 09 17:45:27 EST 2004 | davef
You're correct. There is no criteria for no-lead, but there none for SnPb, either. Solder joint strength in pull/shear will vary with lead geometry, solder volume, lead metal/metallization, the way the test is done.
Electronics Forum | Thu Dec 09 15:19:21 EST 2004 | nrocco
Can anyone point me in the direction to find some IPC standards for lead free solder joint reliablity tests, such as shear tests, pull tests, vibe tests, enviroment tests, etc. I need to know what the specs. are on all aspects of reliability and how
Electronics Forum | Fri Aug 08 11:44:44 EDT 2003 | Henry
I am fairly new to wave soldering and production processes, but I have been tasked with coming up with a calculation involving the shear strength of some through-hole leads. The leads are tinned copper and I suspect that tinning reduces the shear st
Electronics Forum | Mon May 10 15:02:37 EDT 2004 | davef
There's no such specification. Not should there be. Shear tests [in our opinion] are senseless, because: * Solder joint strength in pull/shear varies with lead geometry, solder volume, lead metal/metallization, and the way the test is done. * She
Electronics Forum | Fri Aug 08 12:46:02 EDT 2003 | davef
When I was a salty old fart in the Navy, we sent the babes from the turnip patch off on snipe hunts. Shear tests are [in my opinion] senseless. The shear stress you measure depends more on the shear rate and on the point where the force is applied
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