LEIFELD universal metal spinning machines (spinforming lathes)

      

Spinning is a tradition and LEIFELD has developed the spinning tradition to perfection. The result can be seen in our machines. Today, LEIFELD spinning machines offer a viable alternative to established methods such as stamping and deep drawing. Some of the many advantages are:

• flexible production
• relatively low tooling costs
• quick and economical adjustments to tooling and programs
• short set-up times increasing machine availability.

By selecting from a range of auxiliary attachments, a basic spinning machine can become a versatile spinning center, easy to operate and capable of carrying out, in a single cycle, more than one operation. Operations such as:

• planishing
• profiling
• curling (beading)
• seaming
• trimming
• flanging
• machining

give you the opportunity to diversify and adapt to an ever-changing market and enjoy a decisive lead over the competitors.

The basic elements of LEIFELD's space saving spinning machines are the machine bed, headstock, tailstock, spinning slides and combined Playback /CNC control, which all are installed onto a central base plate. Additional items such as KA and BAE auxiliary cylinders, multiple tool changer etc. allow you to manufacture complicated spinnings in one cycle. Spindle speeds in either direction can be pre-set via the keyboard. A new workpiece can be programmed by "teach in" using the mobile desk or in CNC mode, with data displayed on the screen; or by use of our offline programming software. Gap and pressure control are both standard on all Leifeld spinning machines.

 

Metal Spinning Methods - a technology with a tradition

 

Leifeld has taken a traditional craft and applied to it the latest technological advances.

 

 

A disc blank or pre-form is clamped against a chuck by the machine tailstock and rotated by the drive motor. The spinforming roller, on a two-axis compound slide, is programmed to make a series of sweeping motions to progressively form the metal onto the chuck. Auxiliary slides and/ or tool changers are used to carry out finishing operations such as profiling, machining, edge trimming, curling, beading and flanging.

 

 

Shear Forming - one pass forming

 

In this variant, metal is volumetrically displaced in an axial plane. In a single pass, conical, concave and convex hollow parts are produced whereby the diameter of the open end of the cone corresponds to the initial diameter of the disc blank.

 

       

Deliberate wall thinning takes place as a direct function of the angle of the cone. Cycle times are extremely short.

 

 

 

Reducing (Necking In) - Spinning "on air"

 

Re-entrant shapes where both form and finish are secondary may be produced by spinforming "on air", i.e. with no internal support. In this case, the pre-form is externally clamped in a retaining chuck.

           

Where a higher quality is demanded, internal segmented tooling or, if the geometry allows, an eccentrically mounted, internal roller may be employed.

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