ProNews_1_06_EN.pdf - Kemppi

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Foto: LKA/Markku Tano DO IT YOURSELF Text: Hannu Saarivirta, Welding Instructor Smoked delicacies from your own smoker Fish and fish dishes have always played a central role in Finnish food traditions. There’s no better summer treat than hot, freshly smoked fish served with, for example, new potatoes. Most of us know how to smoke fish, but how many of us know how to build a functional smoker Ready-made smoking boxes can be bought at any local shop, but they are usually lacking something. Furthermore, readymade smokers are made of thin materials, so they won’t last for more than a few heatings in the fire. Not to worry – making your own smoker doesn’t require a degree in engineering. For appetites large and small The design of the smoker is based on the number of diners, i.e. the number of fish to be smoked. The smoker dimensions mentioned in this article are good for smoking approximately 2 kg of fish at a time, which is enough for approximately 4–6 people, depending on how hungry they are. The perfect tool for this job is the new MinarcMig 180 Adaptive welding inverter, which boasts an adjustable power setting based on the thickness of the plate being Pipe used for smoker body The welded grate border frame (and detail) Slides welded to the inside of the smoker 14 Kemppi ProNews 1 • 2006
welded. The machine has a welding base material menu for steel, stainless steel and aluminium. All welds called for in making the smoker can also be made as MMA electrode welds with, for example, the Minarc MMA electrode welding machine, which can also be used for TIG welding. This spring the Minarc product line was expanded with the addition of theMinarcTig 180 welding inverter, which is intended for the more demanding Tig welding applications. This TIG and electrode welding machine has push-button controls, HF spark ignition, welding parameter display and (optional) remote control functions. In addition to the welding machine, making the smoker will require a small reel of 0.8 mm stainless steel welding wire, as well as a shielding gas (Ar 82% + 18% CO 2 ). Although the gas mixture is specifically intended for structural steel, it can also be used in this type of home welding application. The correct shielding gas for stainless steel base material is a mixture of Ar 98% + 2% CO 2 . However, this mixture would make the smoker far too expensive, unless there was some other need for the gas. Discovery of raw materials Making a smoker starts with a trip to the local scrap yard or the like, where you can discover suitable items for use as raw materials. The smoker body should be stainless steel pipe approximately 250 mm in diameter and 500 mm long, with a wall thickness of approximately 3.0 mm. The pipe used for the smoker can, indeed, be made of thinner material, but the stainless steel base material heats up and expands greatly when placed over an open fire. The resulting thermal expansion may hinder the function of the smoker door, and the bottom of the smoker may burn through in just a few years. The metal grates on which to lay the fish should be placed at two levels (grate length 480 mm and width 220 mm); two grates will be required. The grate mesh size can be approximately 30 mm and the material ordinary structural steel, which will not stick to the skin of the fish being smoked as much as a stainless steel grate. A grate made with thin wire and a small mesh size is not suitable for smoking, because the fish would stick tightly to it. When heated, zinc may dissolve into the smoked fish, so steel grates with a zinc coating are not recommended for use in smokers. A tight door prevents flare-ups Always do a test weld on an extra scrap piece before welding the actual parent plate, in order to determine the welding power needed for each joint and to finetune the welding parameters. The grate edges are extremely sharp. First, using a small bead, weld a 6 mm round bar to the edges; this will prevent cuts and injuries. Using stainless steel plate, make U-shaped grate slides to hold the smoker grates. In the model smoker these are punched from 2.0 mm plate, whose length is 480 mm, width 100 mm and height 30 mm. The profiles are welded at both ends at the smoker centreline, evenly aligned on both sides. The end is made of 2.0 mm stainless steel plate: mark the plate and, using an angle grinder with a cut-off disc, cut a round shape to match the pipe profile. The end is tacked to the pipe in approximately 80 mm intervals using small bridge tacks with a gap of approximately 2.0 mm. This will ensure a firm weld joint to both base materials. A good welding position is a highly angled pipe at a slight declination of approximately 30°; the weld surface will be smooth and its protrusion on the inside of the smoker will be even. The end plate is welded to the pipe while rotating the pipe into the desired welding position. The door is made with a diameter 40 mm larger than the pipe; this will reduce the occurrence of thermal distortions. Weld a brace on the edge of the door, and a 15 mm wide reinforcement rim cut from 2.0 mm stainless steel plate on both sides of the brace, using short intermittent welds. The brace will prevent the door from flexing when heated by fire and keep smoke in. If the door is not tight, the alder chips inside the smoker might burst into flame, instead of smouldering as desired. The door hinges are made of 5.0 mm stainless steel plate, from which two 15 x 20 mm and two 15 x 50 mm ” The design of the smoker is based on the number of diners, i.e. the number of fish to be smoked. Welded end Welded door and hinges Smoker fully fitted Legs and steel firepan Kemppi ProNews 1 • 2006 15
Page 1 and 2: Kemppi customer magazine 1/2006 EN
Page 3 and 4: Kemppi ProNews updated EDITORIAL Yo
Page 5 and 6: Photos: Julian Hickman, Blueharbour
Page 7 and 8: Text: Pirjo Pöllänen. Photos: Dae
Page 9 and 10: Text: Antti Syrjä, Quality Manager
Page 11 and 12: Text: Ari Kangasmäki, Sales Direct
Page 13: Text: Pirjo Pöllänen IN CO-OPERAT
Page 17 and 18: New dimension in TIG and MMA weldin
Page 19 and 20: The Little Giant of Welding MinarcT
Page 21 and 22: easily avoided and welding applicat
Page 23 and 24: ”The competitors had great team s
Page 25 and 26: Photo: Aker Yards Kemppi - The Joy
Page 27 and 28: CERN facts: The award was presented
Page 29 and 30: Kemppi receives prestigious interna
Page 31 and 32: Kemppi Oy Subsidiaries Kemppikoneet

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