Double-axis machine for the production of ducts for the refrigeration sector.
Unique to its kind
The Ralc Italia CNC flanging machine is the only machine on the market allowing the nozzle to be developed directly inside the structure of the heat exchanger, and multiple nozzles on the same sheet of metal. This reduces the number of fixing points and relative oxidation, giving the final product high added value. The additional punching station also allows the ducts to be automatically punched, thus obtaining a finished product ready for fixing to the external grille.
The flanging machine allows ducts to be developed in aluminium and steel, including stainless steel.
Several major worldwide producers of heat exchangers have chosen the Ralc Italia CNC flanging machine, which offers the possibility to personalise the radii and shape of the nozzle for greater energy efficiency and improved sound emissions. High machining repeatability, reliability and simplicity of use make this flanging machine a genuine revolution for companies who take the road of customisation, thus giving their product enormous added value.
The machine carries out complex cold-plastic forming through the progressive action of three rolls, which enter and then shape a perforated sheet metal blank, limiting scrap material. The interpolated vertical and horizontal movement of the rolls allows fast, precise, and constant flanging, for a high-quality product. Using dedicated tools, the same machine can produce straight, flanged, and flared edges.
The robotic punching cell allows punching of the flange in preparation for its fixing to the external grille. Thanks to the shuttle system and division of the area into separate zones, it is possible to work in pendulum mode, loading and unloading nozzles while another is being processed. The cell can also work in a single zone for the punching of multiple ducts.
The Ralc Italia flanging machine is supplied standard with everything you need to facilitate the operator and maximise production efficiency.
Quality flanging is possible thanks to a combination of studies conducted on the materials, careful forming calculations, and incredible experience based on hands-on work. Along with the equipment, Ralc Italia also provides the preliminary information to prepare the material, and the complete flanging program, ready to use: the operator simply needs to select the saved program on the control panel and start production.
The openable dies, one for each flanging geometry, are supplied for the production of flanged or flared nozzles; the automated machining cycle allows their opening at the end of machining to allow the automatic extraction of the nozzle. They are fitted with centring pins to facilitate the correct positioning of the sheet metal by the operator. The fixed dies are used to produce straight ducts.
Each matrix has a blank holder, which is lowered by means of 6 hydraulic cylinders; it holds the sheet in place during flanging operations, which is essential in ensuring the quality of the product.
The support system with guides allows the loading of blanks to form one or more nozzles; the unloading system intervenes at the end of the flanging process, allowing the machined duct to be extracted and positioned for easy unloading by the operator.
The roll-holder unit moves along a linear Z-axis with 4 precision guides, gear rack with slanted teeth and brushless motor. The three rolls are connected by bevel gears. Safety is guaranteed by a compensation system.
The opening and closure of the rolls is managed by a brushless motor, recirculating roller screws and precision guides. Correct lubrication of the mechanical components is centralised and managed through practical replaceable cartridges. These very valuable and high-quality components guarantee the best absorption of the significant loads required for forming.
The openable dies are opened and closed by means of recirculating ball screws connected to an encoder; opening is fast and precise.
The CNC fan nozzle machine produces nozzles with diameter from 200 to 1,050mm, with flange or straight, in different heights. The flanged nozzles can also be punched.