E EXPERIENCE 28 - GF AgieCharmilles US

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21 AGIE experience No 28 January 2007 ED wire cutting with efficient functions When manufacturing, such as in the case of a shotgun lock, every machining step must strike home. Because with each milling, turning, ED machining or grinding step, one error can make the workpiece just fit to be thrown away. That is why the «Variocut» function is so important for Fabbri snc when ED wire cutting, because in the course of manufacturing the shotgun lock, cuts through offsets or apertures have to be made. The illustration with the solid model of the shotgun lock prepared in CAD shows this clearly with the cutting surface and the various positions of the cutting wire duly marked. For this, «Variocut» continuously records the cutting cross section and automatically adjusts the power to the changing conditions. The main cut and the four trim cuts can thus be carried out reliably in the course of the various cutting operations on the shotgun lock. Both wire-threading into starting drill holes with «Agiejet» and cutting technologies prepared with «Teccut» for the stainless steel-titanium alloy of the workpieces are carried out with great reliability. The first machining step on the rectangular blank made of stainless steel-titanium alloy is the ED wire cutting of the contour which is coloured red in the solid model of the gunlock. Prior to machining the rectangular piece of Titanium-stainless steel alloy material is heat treated, stress released, avoiding microcracks during machining. The first contours is cut on the Classic V 2 showing allready the rough form of the gunlock. Tullio Fabbri defines the cutting technologies for the next machining job on the «Agievision» control using the «Teccut» function. By activating the «Variocut» function, the cutting cross-section is then continuously recorded by means of which the Agiecut Classic V 2 automatically adjusts the power in the case of stepped parts or openings in the workpiece.
22 AGIE experience No 28 January 2007 Fabbri snc ED die sinking for precision in the third dimension With the increasing progress of the production of the shotgun lock, each further machining step must be carried out with the utmost reliability and precision. Fabbri snc relies on Agietron Spirit 2 for ED die-sinking operations. Detail electrodes made of copper are used for the mainly small cavities on the shotgun lock. They have the advantage compared with complex form electrodes made of graphite that, after wear, they can be simply reworked by milling. In this way, Fabbri snc saves itself expensive electrode production which would additionally tie up personnel and machine capacity. Here too, the employees’ mastery becomes apparent which runs like a central theme through all the production stations at Fabbri snc. We would like to thank Fabbri snc, in particular their Managing Director Tullio Fabbri, for their kind support and helpful cooperation with this report. Responsible Sales Manager: Franco Corti, +GF+ AgieCharmilles All 150 individual parts of a sporting shotgun are made by Fabbri snc themselves. This begins with the selection of finest materials from all over the world, continues with constant material tests on in-house testing devices, goes on further through the production of even the smallest screws, and ends, after over 1500 mechanical and manual production steps, with the testing and adjusting of each shotgun in the company's own underground shooting range. Each of the 13 employees at Fabbri snc is a master of his
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E EXPERIENCE 28 - GF AgieCharmilles US

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