Welding the body of the future furnace begins with careful preparation of seats on the rims, where it is necessary to remove the residue of rubber and rust to pure metal to ensure a reliable seam. The use of disks from a truck, for example, from KAMAZ or ZIL, allows you to get a design with ideal geometry, capable of withstanding high thermal loads without deformation. Metal thickness in such parts is 8-12 mm, which significantly exceeds the parameters of standard bath ovens made of pipes or sheet rolled products.
Creation metal-fire requires strict adherence to the assembly sequence, since errors at the stage of docking the rings will lead to a violation of traction and carbon monoxide leakage. You will need at least three disks: the lower one will become a ash, the middle one will become the main combustion chamber, and the upper one will be a heat exchanger or a place for stones. Critically important do not use galvanized discs, since when heated, zinc releases toxic fumes that are dangerous to health.
Ready. stone-cutter from car discs has a high heat capacity and quickly warms up the room, but requires mandatory lining or screens to protect against hard infrared radiation. The design is assembled by the method of joint welding, forming a vertical column, inside which there is an intense heat exchange. Next, we will look in detail at each stage of manufacture, the necessary tools and safety measures.
Selection of materials and preparation of discs
For the manufacture of a high-quality furnace, steel disc wheels from trucks with a hammer under 8 or 10 studs are optimally suited. The most common option is the disks from KAMAZA 20 inches in diameter, which have a sufficient height of the side and wall thickness. Before starting work, you need to make sure that the metal does not have through corrosion and cracks, especially in the welding zone of the hub.
- 🔧 Three solid disks from the truck (no cracks and deep corrosion).
- 🔥 Sheet metal with a thickness of 4-5 mm for doors and internal partitions.
- ⚙️ Reinforced or thick steel wire for a bell grating.
- 🛡️ Electrodes with a diameter of 4-5 mm for deep broiling of thick metal.
Cleaning the surface from old paint and rubber residues is performed mechanically using a grinding machine with a petal circle. Seam tightness It depends on the quality of the preparation of the edges, so you can not save time at this stage. If you use used disks, check their geometry, putting on a flat surface: distortions can complicate the assembly of a vertical structure.
⚠️ Warning: Never use light alloy wheels or products with unknown metal composition. At high temperatures, they can lose strength or release harmful substances.
For better heat transfer, the inner surface of the lower disc can be covered with heat-resistant metal paint that can withstand up to 800 degrees, although many craftsmen prefer to leave the metal in its natural form to form a protective oxide layer.
Necessary tools and welding equipment
Working with thick-walled cargo disks requires powerful welding equipment, as a 160-amp household inverter may not provide enough digestion. The best choice will be semi-automatic welding in a protective gas environment or a classical DC transformer. The electrodes must be designed for welding structural steels, for example, the grade ANO-21 or UONI-13/55.
In addition to welding, you will need a serious set of locksmith tools for cutting and fitting parts. Bulgarian with metal discs 2.5 mm thick will allow you to make even cuts without overheating the edges of the workpieces. To mark holes under the doors and ash, use a core and a hammer so that the drill does not slip off the smooth surface of the disk.
- ⚡ Welding machine (minimum 200-250 amperes).
- 📐 Corner, roulette and chalk marking.
- 🔨 Hammer-slag separator and chisel.
- 👓 Personal protective equipment: chameleon mask, krags, respirator.
Pay special attention to the organization of the workplace, as the weight of three disks in the assembly exceeds 100 kg, and they will have to be manipulated often. Welding table must be stable, and the workpieces are reliably fixed by rods before the start of the grab. Do not neglect ventilation in the room where welding is carried out to avoid poisoning with scalp and gases.
Step-by-step instructions for assembling the body
Assembly of the case begins with the installation of the lower disc, which will perform the function of a grill and the base of the furnace. Two discs are placed on each other and fixed by strubcines, after which the precipitating seams are performed every 10-15 cm in a circle. After checking the verticality level boiled solid seam from the outer and inner sides of the joint.
The middle disk, which is the main heat-chamberIt is welded in a similar way, but it is necessary to provide holes for loading fuel and air supply. In the lower part of this segment, a rectangular hole is cut under the ash, and a little higher - under the furnace. Between these levels are installed segments of reinforcement diameter of 12-14 mm, which serve as a grate.