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EMUGE Cut&Form thread technology

EMUGE Cut&Form thread technology
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Threading Technology • Strengthened threads and increased long-term resistance • Cold forming of large threads with coarse pitch • Cold forming of threads in difficult materials • Production of a narrow-tolerance minor diameter without space pocket • Smoother thread surfaces Form… Cut… Cut&Form Production of internal threads by a combination of machining and cold forming

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Cut&Form Threading Technology Functional principles Combination of machining and cold forming The internal thread production system Cut&Form is a combination of machining and cold forming processes which each produce a specific part of the thread profile. If you look at our sketch of the cross-section of a metric thread, you will see a black contour which outlines that part of the thread profile which is produced by the cutting tap or the thread milling cutter. The other part of the thread profile which is marked by the red contour is produced subsequently, by the cold-forming tap: this...

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Cut&Form Threading Technology Suitable application areas Strengthening of the thread and increase of long-term resistance In highly stressed components, considerable notching effects may come up in the thread, depending on total stress. Tapping Cut&Form cut thread pre-cut and finish-formed thread small wall thickness notching effect small wall thickness strengthened material structure finish-formed cross-section pre-cut cross-section In the following diagrams you can see the number of load cycles which a cut thread and a thread produced by the Cut&Form system were able to withstand in...

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Cut&Form Threading Technology In the following illustrations you can see the material structure of a thread in C45. The left-hand picture shows the thread after the first production step of a Cut&Form process; the picture on the right side shows the material structure of the finished thread after completion of both production processes. Cut Form pre-cut thread finish-formed thread Polished material structure photo of pre-cut thread Polished material structure photo of finish-formed thread In the finish-formed thread, you can recognize a visible deformation of the material structure in the...

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Suitable application areas [Thread profiles with a pitch of up to 6 mm Thanks to the combination of production processes in the Cut&Form system, the process forces exerted in the cold forming of a full thread profile can be drastically reduced. This means that large threads with a coarse pitch and large machining cross-sections can now be produced with a finish-forming process. In the following illustrations, you can see the process steps in relation to the formation of the thread profile. Workpiece material: Tensile strength: Thread depth: Thread hole type: Thread pitch: blind hole -formed...

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Cut&Form Threading Technology Materials with bad cold-forming properties Materials with bad cold-forming properties, like cast iron, can be machined in a Cut&Form process with a high degree of reliability. Especially the minor diameter area of the thread can be formed to a high degree of perfection. Smoother thread surfaces Thread applications which require an elevated surface quality, like ball-screw threads, can be produced safely and reliably with Cut&Form. Thanks to the cold-forming process, peak-to-valley height values of 0.4 micron, with good lubrication even better, can be achieved....

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Cut&Form Threading Technology Tool technology Threading tools Taps or thread milling cutters which are to be used for Cut&Form must be provided with a special geometry in the thread profile. For finish-forming, cold-forming taps with a thread profile specially adjusted to the pre-cutting tool are used. Only those areas of the thread profile which have not been machined by the pre-cutting tool are cold-formed. A special patented finish-former design was developed for that task. This design features guiding parts which are situated in the lower part of the thread profile, and finish-forming...

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Cut&Form Threading Technology Tool holders Special clamping of the threading tools with specially adjusted tap holders is a necessary precondition for a safe Cut&Form process sequence. Process monitoring will add the last touch, and give the highest degree of reliability to the system. Cut Form Process monitoring Special engineering for the application case It is a fundamental strategy of EMUGE to always adjust tool parameters like cutting material, surface coating and geometry to specific application conditions like material, lubrication, hole type, work position etc. The construction of...

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AUSTRIA BRAZIL EMUGE Präzisionswerkzeuge GmbH Pummerinplatz 2 · 4490 St. Florian Tel. +43-7224-80001 · Fax +43-7224-80004 EMUGE-FRANKEN Ferramentas de Precisão Ltda. Av. Dom Pedro II, 288 – 11° Andar · Bairro Jardim - Santo André São Paulo Brasil - CEP 09080-000 Tel. +55-11-4432-2811 · Fax +55-11-4436-3896 BELGIUM EMUGE-FRANKEN B.V. Handelsstraat 28 · 6851EH Huissen · NETHERLANDS Tel. +31-26-3259020 · Fax +31-26-3255219 CANADA EMUGE Corp. 1800 Century Drive · West Boylston, MA 01583-2121 Tel. +1-508-595-3600, +1-800-323-3013 · Fax +1-508-595-3650 CHINA EMUGE-FRANKEN Precision Tools (Suzhou)...

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