The Kern contract manufacturing offers you μ-precise HSC machining (High Speed Cutting) in air-conditioned rooms for your machining task. With our modern machinery, we implement high-precision contours, free-form geometries and bores with form and position tolerances of up to ±1 μm with process reliability. This means that time-consuming adjustment can be dispensed with when assembling precision assemblies.

The hydrostatic guides of the Kern Micro HD guarantee maximum precision and damping with absolute freedom from friction and excel particularly when machining hardened steels or materials that are difficult to machine. Due to the hydrostatics, we achieve extremely high surface qualities and can thus considerably reduce reworking (e.g. polishing).

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The features of Kern contract manufacturing for HSC milling and hard milling at a glance:

• μ-accurate manufacturing in air-conditioned rooms
• CAM programming for 3- to 5-axis simultaneous milling
• High Speed Cutting at up to 50,000 rpm
• Hard milling up to 66 HRC with best surface finish because of hydrostatics
• Quality control with 3D-coordinate measuring systems
• Monitoring of serial production by SPC (Statistical Process Control)

Many industries have a growing need for micro parts, be it analytics, medical technology or traditionally the watch industry. Kern contract manufacturing has more than three decades of experience in this field - since the development of the first micro milling machine - and is constantly developing further.

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Our micromilling and microdrilling features at a glance:

• μ-accurate production of micro-parts and micro-structures in an air-conditioned space
• Use of micro-tools: from drill size Ø 0.03, milling cutter Ø 0.05, tap drill M0.2
• High Speed Cutting at up to 50,000 rpm
• CAM programming for 3- to 5-axis simultaneous milling
• Quality control with 3D-coordinate measuring systems
• Monitoring of serial production by SPC (Statistical Process Control)

EDM is a non-contact machining process for workpieces with combined requirements that go beyond milling, e.g. for special geometries or material hardnesses. In Kern contract manufacturing, we achieve the same precision for micro parts and micro structures with this technology as with high-precision milling.

In order to meet our high quality standards with consistent excellence, electrodes and microelectrodes for die-sinking EDM are manufactured on our high-precision Kern CNC milling centres and checked with 3-D coordinate measuring machines.

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Wire eroding in the Kern contract manufacturing:

• High accuracy within +/− 1.5 μm
• Surface quality up to Ra 0.05
• Micro-EDM & fine wire-cut EDM up to Ø 0.03 mm
• Wire EDM with CNC dividing head (rotary axis)
  

CNC die-sinking EDM in the Kern contract manufacturing:

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• 16-fold electrode changer
• Micro-EDM with a special generator for ultra-fine structures
• Starting hole EDM from Ø 0.23mm to Ø 3mm

Latest machine technology at Kern Microtechnik :
Our new Agie Charmilles Cut 3000 enables tolerances of 1.5 μm on the workpiece as well as surface finishes of up to Ra 0.05. With the twin-wire system (two-wire guide system), we automatically switch from standard wires to fine wires during machining and can realise inner radii of less than 20 μm. Wire diameters range from 0.03 mm to 0.3 mm.

From the in-house production of high-precision Kern machine components, Kern Microtechnik has great know-how in the production of axis components, spindle beds and guide bearings for precision guide systems.

Surface grinding ensures the flatness and parallelism required for contact surfaces with the best surface quality. With our surface grinding machines, we achieve an evenness and parallelism of 2 μm on a surface of 600 x 200 mm in Kern contract manufacturing.

For the highest precision in combined machining of jig grinding and milling in one clamping, we use our hydrostatic Kern Micro HD. We were able to reduce the machining time for grinding prismatic guides in 5 axes by approx. 80 % compared to conventional machining on a surface grinding machine. The accuracy is 2 µm in parallelism and angularity.

With the Trumpf TruMark 3230 marking lasers, we perform micro-lettering and the creation of data matrix codes on almost all materials. A good example is the temper marking of plastic parts from a diameter of 0.7mm and a length of 2.3mm. We can also mark the parts at the circumfence by turning the indexing head.