Leifeld CNC NC spinning machine

The company Leifeld Metal Spinning Gmb is the technological and commercial market leader world-wide for the development, fabrication and sales of machine tools in the range of spínníng technology. Today s business has its seeds in the cooperage
Leifeld, established in the Westphalían city Ahlen in 1891. Since the nineteen-twenties also tools for metal formíng procedures have been manufactured
the nineteen-thirties the fírst manual spinning lathe has been developed and fabricated. This was the begínning of a neaгly matchless development, initiating essential innovatíons in the spinning technology within the last seventy years.
Leifeld significantly accelerated the technical progress in chipless metal forming. Cooperage Leífeld 1891 Establishment of the cooperage Leífeld in Ahlen  Westphalia 1945 The son Theodor F. Leifeld took over the company. He significantly enlarged the business with todays structures to a world-wide acting group. in the nineteen fifties the first hydraulic spinning machine in the world . 
in the níneteen-sixties the first NC-controlled spinning machine
in the nineteen-seventies the first CNC-controlled forming centres in the in the nineteen-nínetíes the fírst 16 flow-forming world machines for the productíon of clutch housings for automatíc transmissions in large batch proin the nineteen-eighties duction have been supplied to the company Ge the fírst playback-controlled spinning machine in neral Motors. the world in the followíng years more than 400 inventions 1988 have been patent-registered ín many countries
Takeover by the Muních financíal syndicate of the world.
Matuschka lnnumerable technícal artícles and company
brochures wíth comprehensive technical information have been publíshed in all world languages. Today all machine tools are developed and fabricated in the headquarters in Ahlen and are
supplied then to nearly all countríes of the world including the commissioning there afterwards. Moгe than 5000 machines in more than 120 countries are record for know-how and competence
of the company. The subsidiaries in the , іn Japan, England and France as well as industrial representations in all other important industrial nations are guarantor for the required customer proximity and the building up of long lasting relationships. September 2007
Dr. Georg Kofler took over the companys shares Manual spinning of the lnter-Consult and the Leico-Holding. Regarding the process, a round metal disk, a tube or a cast or forged blank is set into rotation.
Pressure forces are initiated on the metal by means of forming rollers, which let the metal flow. Any hollow bodies wíth complicated resp. complex geometry, with most narrow tolerances and best surfaces can be manufactured this way. For process reasons a hardening of the material is reached ín case of chipless forming, which leads to an enormous saving potential wíth regard to
the resources materíal and weight. Leifeld enhanced and perfected thís process Extremely flexible production possibilities and consequently. The result was realized in our relatively low tool costs as well as quick and engineering concepts. Todays Leífeld-spinning economic modífication possibilities regarding machines out of the PNC-line operate playback- tools and production courses íncrease the controlled and are the competítive alternatíve to degree of utilization. the known processes like for example deepdrawing and flow-turning. FORMING IN ONE OVERFLOW
At this process the volume elements are moved against each other in axial direction, means shearformed. By forming in one overflow conical workpieces workpiece díameter equals blank díameter- can
be manufactured with purposefully reduced wallmthickness and a surface able to be polished in an extremely short cycle-time.
ON AIR OR WITH CHUCK Workpieces not having to meet special demands regarding surface qualíty and contour accuracy
aгe necked-ín on air . A cylindrical preform is held by an outer clamping chuck. A necking-in chuck in the real sense is not
available. in case of workpieces demanding a high qualíty regarding shape and dimensional accuracy dívidíng chuck tools or eccentric inner tools are applied. LEIFELD  Flow-forming is a process for the chipless forming of rotationally symmetric hollow bodíes. The forming is realized partially by compressíve stress, which is brought into the material by means of radial lead flow-forming rollers. The matenal flowsand adopts the contour of the inside spinning chuck ín one roller pass. The productíon accuracy corresponds to the one
of machining. An uninterrupted fíber course of the material and the hardness increase depending on the forming degree argue for the applcation of flow-forming. All ductile metals and metal alloys, íncludíng stainless steels and The numerous process variants of profiling can es aluminium alloys, can be formed up to a tensíle sentilly be assigned to the so-called splitting, fol strength of approx. 2200 N/mm . A distinction is dingesprolling processes. At all variants the drawn between shear forming and cylindrical formíng is realized in similar order and evolves flow-forming. from a combination of different processing steps. A deep-drawn cup or a flat blank aгe formed in one clamping. Thereby the single processing steps are effected with variably contoured rollers. Radial forming processes represent an economic alternative for example to the manufacture of pulleys by casting and machining. The necking-in machines of the type series EN have especially been developed for hot forming. They are preferentially applied for the manufacture of high-pressure gas bottles and CNG cylinders. starting from a tube, necks and bottoms are formed and gas-tight closed. EN 200 NC The hollow part ends to be formed are heated on the requíred formíng temperature by means of an induction coil, supplíed to the clamping chuck by means of a loadíng unit and set into rotation. The necking-in roller moves on optimized path curves and by dint of the slide swivel motion an optimal position of roller to workpiece is guaranteed in every phase of the forming operation. Gas burners compensate the heat produced during the formíng process,by means of this process a variety of
cular economic efficiency during the productíon outerjacket shapes can be realízed contour off of rotationally symmetric precision hollow parts. sets, transient radil and conical areas are This is mainly justifíed by the materíal savíng of this sible - like they are in principle not obtainable chipless process, by the cold hardening emerging with other forming processes as for example from the forming and by the considerably shortetrusion, ironing or also deep-drawing.
ned operative times opposite to machining processes. All ductile metals and metal alloys including stainless steels and aluminium alloys can be formed by means cylindrical flow-forming, even in
tempered or solution annealed condition
SYNCHRONOUS- AND COUNTER ROTATION PROCESSES
Duríng the cylindrical flow-forming two process The axial force of the rollers presses the bush on variants aгe dífferentiated accordíng to the the toothed segment and sets ít ínto turníng mo axіal flow direction of the material. Thus at the tionhereworth. During the formíng the material flow-forming in synchronous run the material flows below the rollers towards the free roller flows in the direction of the axial roller feed. mandrel end and beyond the free working
Thereby the blank area still not involved in the aгea of the machine. So the longitudinal feed forming operation is moved before the rollers. and flow direction are contrary to each other. A cup, whose bottom or inner flange ís pressed Contrary to the synchronízatíon process the on the free mandrel end using taílstock force workpiece length that can be obtaíned by and pressure plate, serves as startíng part at thís means of the counter rotatíon process is not liprocess. mited by the longítudial slide stroke and man if there is no bottom or ínner flange at the drel length. For example, at a wall-thickness
blank, a counter-rotation flow-forming process reduction of 60 a workpiece length of times is required. For this purpose the blank bush is the maximum slide stroke gets possíble. pushed over the roller mandrel up to its clam ping point and gripped there by a driver ring provided with hardened teeth. LEIFELD  Todays production programme of the company compríses machine tools, attuned to the customer demands, for the economic fabrication  PRODUCT APPLICATION RANGE
Reflectors Lighting systems Fan parts Engíneering Cooking pots, pans, bowls Household appliances Tin cups Handcrafts Separator components Chemical and biotechnological industry Vessel bottoms Aerospace and chemical industry V-belt pulleys Drive technology - engineering Poly-V-pulleys Drive technology - automotive industry Toothed belt disks Drive technology - automotive industry Lamellae supports toothed Automatic transmissions  automotive industry Hollow wheels for planetary gears Automotíve índustry  engineering Sliding sleeve for dríve shafts Automotíve índustry - engineering Sensor wheels for anti-lock brake systems Automotive industry - engineering Brake pistons Automotive industry High-pressure gas bottles Petrochemical or chemical industry CNG-cylínders Líquefied gas-driven motorcar índustry Special hydraulic cylinders Engineering, aírcraft construction Airbag-housíngs Automotíve industry Steel wheels for cars and utility vehicles Automotive industry Steel wheels for utility vehicles Automotive industry Light alloy wheels for passenger cars Automotíve industry and trucks LEIFELD  Growing customer requírements and hígher stress of competition force all industrial areas to create cost-effectíve and qualíty-oríentated problem soiutions. The applícatíon of modern Leífeld for- SAVING OF RAW MATERIALS AND ENERGY ming machines, based on the solid construction, the technical ímprovements as well as stateof
Savings potentials wíthin the scope of production the-art CNC-controls, guarantees always ultimate Energy by minimum postprocessing  substítutíon of processíng operations precision at relatively low production costs. Therewith Leífeld spinning- resp. flow-forming  centres suit for the single- resp. prototype
productíon as well as for the series production of BY INNOVATIVE PRODUCTION PROCESSES medium up to very hígh lot sizes. High materíal utilization ratio Enormous savings potentials regardíng resources material weight one-piece workpieces  if so, application of less hard and therewith often cheaper materíals Cost-effectíve productíon in few manufacturing processes Strengthening and hardening High-density structure Favourable, non- interrupted fiber course Complicated resp. complex geometry One-piece multifunctíonal components Relatívely low machine costs Low tool costs Short sefting times Easy adjustment possíbilities during workpiece modifícations by programme changes A complete and comprehensive servíce from the design up to the completion of the machine tools is províded to the customers of Leífeld Metal Spinning GmbH. The company has an own design and assembly department, an in-house chipping as well as an own material- and spare parts store. The world-wide appliation of Leífeld-machines furthermore requires and guarantees an after sales servíce from the assembly and briefing at the place of supply up to telephone support