METALS WE WELD: iron, aluminum, zinc, copper.
ALLOYS WE WELD: stainless steel, bronze, brass, cast iron.

Costruzione Ricambi Macchine Industriali offers clientS in Milan a number of specific processes, such as welding for special metals and alloys.

Through our welding procedures [Tig (with or without added material), Mig (or continuous wire), and coated electrode resistance], we can undertake the repair and assembly of manufactured goods (in the metals and alloys shown) for a range of purposes such as, for example, industrial applications, handicrafts, arts, transport, large and small catering applications and purely domestic purposes.
In addition, we can build, to a specification or design, any kind of structure from a particular metal.
The metal items we repair or manufacture include:
special metal cars, trucks, motorcycles and bicycles (frames, light alloy wheels, tested, mechanical components etc ...), stairs and aluminum items, metallic structures of various sizes for interior and exterior use (frames and supports for tents, metal box covers for gas meters etc), lamp posts, artistic items and designs for decorating the home, and kitchen utensils.

WE DON'T WELD ZAMA.


Get in touch, or come and visit our HQ in Via Cortina D’Ampezzo, 14 (Ripamonti-Vigentino area) in Milano, for a full, personalised quotation.

WHAT DOES TIG WELDING INVOLVE?


welding metals

TIG welding( Tungsten Inert Gas) or GTAW( Gas Tungsten Torch Welding), is one of the most common methods in use. An arc welding process, with an infusible electrode (Tungsten), under the protection of an inert gas, which can be run with or without a filler metal. The procedure is based on a torch in which the tungsten electrode, around which the protective gas which is inserted via a nozzle of ceramic material flows, whilst supported on a melt bath. The operator moves the torch along the joint to move the weld pool, by positioning the infusible tungsten electrode a maximum distance of a few millimetres and keeping this distance stable. The electrode must never come into direct contact with the workpiece to be welded, otherwise the tungsten wand will become "attached" to the joint, which interrupts the weld. Where filler material is required, the baton of material is moved simultaneously, so the end is kept within the arc all the time, and in any case under the protective gas.

Our company's operators, who are specialists, undertake TIG welding for thin stainless steel thicknesses using linear and circular positioners.

WHAT DOES TIG WELDING INVOLVE?


What is termed MIGwelding ( Metal-arc Inert Gas), is a type of arc welding in which the metal is kept under a protective gas, and is among the most widely used welding processes. MIG welding process is a continuous wire process, in which protection of the weld pool is ensured by a covering gas , which flows from the torch onto the workpiece. The fact that it is a continuous wire process ensures high productivity, and the presence of gas allows operations without any slag being produced. All this increases the cost of the procedure.

WHAT IS THE SHIELDED METAL ARC WELDING?


shielded metal arc weldingor SMAW( Shielded Metal Arc Welding - arc welding with the metal protected ) is currently the most widespread welding technologies in the world.

The electrode consists of a metal rod, called the core, which is covered with a dried mixture, or coating , composed of several deoxidizing materials. During welding, when you bring the electrode to a suitable distance from the work piece, the electric arc melts the metal electrode material, the coating and the metal of the part to be welded. The welder manually moves the gripper, thereby managing the welding bath . After the operation, the welder must chisel off the crust ( slag ) that formed over the solder, which serves to protect the metal whilst cooling.

WHAT IS RESISTANCE WELDING?

Resistance weldingor RW( Resistance Welding) is an autogenous pressure welding method in which the material is heated by an electrical resistor. Resistance welding is generally used to weld steels, and is implemented in three phases:
1. the electrodes (generally copper, formed into a wheel or point-like shape) are brought near to the surface of the parts to be welded (usually two sheets) then the machinery exerts the pressure needed to compress the parts between them;
2. a predetermined current is passed through the electrodes;
3. the electrodes are removed from the surfaces of the piece, so they are joined by a small volume of melt and solidified (welded or spot welded ).

The wheel-shaped electrodes are made to rotate continuously and often feed the workpiece. Resistance welding has the advantage of having less severe thermal cycles, and thus a significantly reduced heat-affected zone than for other types of welds. However, it can only be performed on limited thicknesses (generally up to 3 mm).

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