- Manufacture of small, medium and large series parts
- Deep drawing on transfer presses
(pressing force: 125 to 3000 kN, up to 22 work stages)
- Deep drawing in progressive die processes
(pressing force: 750 to 1250 kN)
- Forming on single presses (pressing force: 650 – 1000 kN)
Thanks to its high flexibility OEKA TECH covers a large spectrum of different quantities – from small-series to large-series production. We manufacture large and medium series on transfer presses and in progressive die processes on automatic punching presses and automatic forming machines. In addition, various single presses are available for prototyping and small-series production.
Our machinery pool includes thirteen transfer presses with a pressing force in the 125 kN to 3000 kN range (from 12.5 to 300 t) and up to 22 work stages. We use automatic punching presses and automatic forming machines with pressing forces from 750 to 1250 kN (75 to 125 t) for progressive die tools.
Cleaning / Lubricating
- Cleaning / Aqueous (water-based) degreasing
- Cleaning / Solvent-based degreasing
To remove the drawing agent required for the drawing process from the parts manufactured, our plant is equipped with both solvent-based and aqueous degreasing facilities. We use the aqueous system wherever possible. However, solvents must be used in many cases in order to comply with increasing requirements for the cleanliness of parts.
Surface Machining / Deburring:
- Deburring:Vibratory finishing in the rotary vibrator, with or without grinding beads
- Smoothing and compacting by means of ball polishing
- Drying in circular kilns
Depending on the process applied, sharp ridges and more or less distinctive burr formation can be observed on the edges of deep-drawn parts. In many cases these can hamper further machining steps and parts transport. After deep drawing and cleaning, the products run through an individually adjusted vibratory finishing process for deburring and rounding off cutting edges and cutouts. The rotary vibrators used for this purpose are filled with compound liquid, as well as grinding and polishing beads of various geometries made from stainless steel or ceramics. In many cases processing without the use of any additional grinding beads is sufficient, i.e. the deburring is ensured by the frictional forces caused by the parts moving against each other in the rotary vibrator.
We deploy the ball polishing procedure in order to reduce the surface roughness of parts and compact the structure on its surface. While the parts slipped onto racks are rotating in the facility, the vibration of the polishing beads pulsating at high frequencies provides for the necessary smoothing and compacting.
After vibratory finishing and ball polishing – both in wet procedures – the products are surrounded by a hygroscopic medium and gently dried in the circular kiln while being exposed to the correct temperature.
- Various hardening procedures
- Various annealing processes
To ensure the suitability of the deep-drawn parts for various applications and functions, their material properties and physical-technical characteristics (strength, hardness, etc.) must be modified after the forming process. This is performed by means of specific thermal treatment, such as hardening and annealing processes after the deep drawing.
Thermal treatment in general – and the hardening of thin-walled deep-drawn parts in particular – are generally considered a challenge. Parts are exposed to process-inherent tensile and compressive stress during forming. Thermal treatment relaxes these types of stress and the part geometry changes, i.e. the parts tend to become deformed (e.g. warping or ovalization). To ensure the dimensional accuracy of the parts after thermal treatment, the unmachined part (“blank)”) must be dimensioned accordingly.
We have acquired comprehensive know-how in the design and manufacture of hardened and annealed deep-drawn parts over the course of many years.
Surface Finishing / Compacting :
- Blasting with various blasting agents (glass beads, plastic granulate, etc.)
- Brushing and grinding
We also offer surface machining procedures such as blasting, brushing and grinding.
Surface machining with various blasting agents – such as glass beads or granulate made from stainless steel, ceramics and plastics – can modify a part’s surface roughness and compact, and thus strengthen, the material structure.
Brushing and grinding procedures are mainly used for decorative purposes. Here, the focus is on high-quality design and the appealing look of visible parts.
These two processes also serve to specifically modify the surface roughness.
- Galvanic coating
- Anodization / hard anodization
After forming, an electroplated coating is applied in order to protect components against corrosion or for functional reasons. We offer all kinds of commonly accepted metallic coatings.
Gloss or hard anodization of deep-drawn parts made from aluminum materials: All these procedures are also part of our surface machining portfolio. Gloss anodization rather serves for decorative purposes, whereas hard anodization is ideal for achieving wear-resistant and mechanical stress-resistant surfaces.
Heat treatment, as well as the machining and coating of surfaces, are sub-contracted to experienced partners, with whom we have cooperated on a regular basis for many years.
- Manual assembly
- Semi- and fully automatic assembly
The OEKA TECH service portfolio also includes component assembly. Depending on the number of parts, the work steps involved are performed fully-automatically, semi-automatically or manually. Assembled components can consist of various deep-drawn parts manufactured in-house and purchased components such as pressure die cast parts, fine blanking parts or bent parts.
We use laser technology in order to provide the surface of deep-drawn parts with inscriptions, logos or symbols. These procedures enhance a component’s visual appearance. When combined with high-quality surface finishing they are ideal for creating a sophisticated design.
- Visual inspection
- Dimensional and functional inspections
- Manual and automatic inspection
If necessary, the components run through automatic or manual 100% inspection at the end of our manufacturing chain in order to ensure their suitability for a component’s subsequent processing steps or application at the customer. The focus of this inspection is on visual, geometrical or functional aspects.