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Member postings for Adrian Gough

Here is a list of all the postings Adrian Gough has made in our forums. Click on a thread name to jump to the thread.

Thread: Silver soldering Stainless Steel
02/09/2011 18:45:52
I used to work in a hospital and regularly silvered soldered stainless steel with no problems.
We used Easy-Flow Stainless Steel grade flux.
Both these materials were suppled by RS components. (no connection)
We could also soft solder Stainless using a proprietary grade of Bakers fluid made for Stainles steel. In the days that Hospitals had a full chemical lab the chemist would make up flux for us. This meant dissolving Zink in Hydroclic Acid (Basic Bakers Fluid) adding a few drops of a detergent and then adding extra Hydocloric Acid.
We could soft solder Stainless aseasily as copper.
We had to soft solder very thin wall tube 3mm OD to a block of Stainless 25MM x 12mm x 6mm,so that the tube was not overheated by using a gas tourch we used a hot air gun with very good results.
The joint had to e cleaned extreamly well after of course.

Thread: Spark erosion machines .
14/03/2011 10:22:38
Back in the 1970's a company based in Gloucester called Sparkatron produced one of the new type of spark erosion machines (EDM). These used an electronic system that used a square wave pulse of controlable frequency with controlable pulsewith. It could put a 1" square hole through nickel based alloys and go as small as a 0.004" diameter (very difficult in those days). The control of the quill was achieved by hydralics so there was a very fast reaction to cutting conditions and no backlash. Vibration could be induced verticaly to aid cutting. Other companys about then produced machines of vaying capacities and performance, some may be still around. An aside. I once read a thesis on expermental work witn EDM by an undergrad at Bristol University,the 'swarf' produced is a hollow sphere with a sphere inside it. There,you wanted to know that did'nt you.
Thread: Electrical Generator/motor
19/12/2009 17:44:52
Thanks all. I was coming to the conclusion that to 'cheat' would be the most sensible way to work round my problem.Adrian gough
12/12/2009 19:00:29
I would like to make a motor/ generator for a small model beam engine.
When under steam or air power to genrate enough power to light a few tiny laps r LEDs. Also to drive he beam engine from a battery when there is no steam or air available.
If Model Engineer ever ran an article I would like to know.
Thaks.
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