Flames in the Furnace! Home made gas fired furnace being built.

I pushed on with the furnace project this morning with the aim of designing and producing the method of securing the burner to the furnace body.  I decided to make a clamp out of aluminium and bolt this to two pieces of steel angle iron which in turn would be welded to the furnace frame.

After measuring up I marked out the piece of aluminium and went over to the milling machine.  The first task was to mill out the gap required to let the burners delivery tube. Then the main diameter hole was finished to size by using a milling cutter (after removing as much material as possible using the slot drill). After those two tasks were completed the overall size of the bracket was brought to finished size by milling.

There were 6 holes to drill, 4 for mounting the clamp to the angle iron and 2 tapped 6mm for grub screws which holds the burner head in position (please see photo's) before going to the scrap box to find some angle iron to which the clamp is bolted.

One adjustment had to be made however to get the burner in the right place by means of milling a step on the furnace face side of the clamp. After that its was a quick clean up before starting on the two angle iron brackets. These were brought to shape by measuring against the now nearly finished aluminium bracket. Once they were finished the holes were transferred from the aluminium to the angle iron by steel punches, the first time I used them and was impressed with the results. The set of punches were bought cheaply on eBay and I must say they really made easy work of marking the holes in the correct places.

Once the mounting holes were drilled and tapped into the angle iron the clamp was bolted to them and the bolts trimmed to length by means of the Proxxon and the Dremel cut off discs which performed well. Running out of puff I decided to position the assembly in place and when it all seemed secure thought "why not!" and decided to fire up the burner albeit briefly (I want to bring the temperature up in the furnace gently and for a prolonged period when the lid has cured a little) to see if the burner I am using would work.

After trying to get an old set of matches to work the burner lit and I am confident it will deliver the goods. This may be wishful thinking when its running for a long time but I am still hopeful.

All that remains now is to trim the grub screws that hold the head in place and get the welder out to weld the angle iron brackets in their final resting place and weld the lid hinge in place before making a steel stand to sit the crucible on but it has had a flame in it! Can't wait for the first melt!

Follow its progress on my main website and here are a few explanation photo's......

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About Mike Freeman

Hello, my name is Mike Freeman and I am a retired Chief Fire Officer from the United Kingdom with a keen interest in model engineering, silver caddy spoons and sea fishing. I live in the pretty fishing port of Brixham, South Devon, in the United Kingdom. I am a sufferer of degenerative osteoarthritis, which impacts on the amount of time I can spend in the workshop, and is the reason why you will see seats and a stool in some of the photo's. I have only recently added the above sentence after a discussion with one of my Doctor's from the excellent pain clinic, based in Torbay. This does affect concentration one of the reasons why I double then re-double my measurements and set ups. Before completing nearly 30 years of public service I and my wife Sandy, owned and ran, a small restaurant in Okehampton Devon. Prior to marriage I worked for my father in his various businesses, in the early days these were garages, which he bought in a run down state, then built them up before moving on, to start again. I took every opportunity in those early days, to work in his workshop's learning 'on the job' rather than as an apprentice. This, I suspect, is the reason why my building various model's in the early days, turned into model engineering, when funds allowed the required equipment to be bought. My workshop comprises one half of a detached double garage. It has a stud wall separating the two halves and unusually perhaps, its own shower/toilet/washbasin compartment! (the true reason for buying the bungalow - don't tell the wife!!!) It is fully insulated with a ceiling and fluorescent lighting supplementing the one window. Several double electrical sockets are dotted around in relevant positions. Equipment consists of 2 lathes (1 Myford ML 10 and 1 Chinese variable speed motor with etched glass DRO's), 1 milling machine (RF25 far East) floor standing pillar drill, Proxxon bandsaw, Warco bandsaw, 6" wire brush and polishing mop motor, 6" coarse and fine grinder, Proxxon mini drill, various benches and an engineers vice. I have just acquired a third lathe, a Myford ML7 which I am at present evaluating so I can decide which of the Myford's I will keep. I have only just bought the Chinese lathe and had it fitted with DRO's prior to delivery. And what a bonus they are! So good in fact that I decided to buy another set for the Milling machine. Whilst my engineering experience can only be described as limited, I find the use of DRO's has affected my accuracy levels which have improved tremendously (although that's not saying much!) and would recommend their fitting to any model engineer. Prior to retirement I built for my son's 17th birthday a Locost car. This was a tremendous project and a great feeling when it passed its test. The book it was based on suggests it can be built for £250. Ours was nothing special in the sense of all new parts but still cost about £900 to build!
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