Your solution partner for prototyping

Our prototyping department is the central development partner for prototypes and very small production runs of traction drives for electrified vehicles based on hairpin technology. We design and assemble all mechanical components of the stator and monitor every step of the process with comprehensive quality controls. State-of-the-art measurement and testing methods ensure that all components and assemblies meet the highest standards.

We place a special emphasis on the development and optimization of the winding head design, which is critical to the performance, form factor, and efficiency of modern electric motors. By manufacturing A and C prototypes on production equipment that closely resembles that used in series production, we validate not only the product design but also the underlying manufacturing processes under realistic conditions, so that you can move directly from prototyping to series production with us.

Laserschweißanlage

Pulverbeschichtet

Pulver Prozess

From concept to production

We are your solution partner throughout the entire value chain —from the initial idea to mass production. Starting with the design phase, we support you in developing optimal hairpin concepts. In our prototyping department, we produce A and C samples quickly and reliably to validate concepts at an early stage.

In addition, we offer flexible solutions ranging from individual machines to small-batch production and fully automated mass production. We combine technological expertise with practical implementation. This ensures that your products not only function as intended but can also be manufactured efficiently and cost-effectively —all from a single source, tailored to your requirements.

Your solution partner

Sample production

  • Series-oriented systems
  • Agile tool concepts through rapid prototyping
  • 6 weeks or more lead time

Sample production

  • Series-oriented systems
  • Standard-series-tools
  • 24 weeks or more lead time
Get in touch

An overview of our prototyping processes

Paper Insulation

  • Flexible production of paper insulation
  • Possible forms: O/U
  • Custom materials based on customer requirements

Pin production

  • The FMU40E CNC bending machine from WAFIOS enables the efficient production of hairpins from flat wire
  • A unique vertical bending process with the minimal thickening on the market
  • Precise and integrated wire stripping
  • Applicable to production equipment

Basket assembly

  • Manual Loading into the Fixture
  • Variable number of slots, diameters, and stack lengths
  • Various pin geometries are possible (U-pins, cover pins, jumper pins, I-pins)

Winding: Joining/Inserting

  • Manual Loading into the Fixture
  • Insertion into the stator (force-distance monitoring)

Widening

  • Production-Series CNC Expander
  • Modular rapid prototyping tooling and concept
  • Directly derived from the series concept
  • Widening in single or paired increments per groove
  • Automated process with support for the pins in the area of the stator package

Twisting

  • Production-grade CNC Twisting Machine
  • Twist control with Interface to the twist calculator
  • Number of layers: up to 8 simultaneously or > 8 in layers
  • Simultaneous twisting with individual axial compensation per position

Pin cutting

  • Prototype cutting/welding cage with a series-oriented clamping device for pin cutting for all stator geometries
  • Pin cutting is possible for stators on the twist side
  • Various cutting methods for a wide range of boundary conditions
  • Both manual pin cutting and pin cutting close to production specifications are possible

Welding

  • Prototype cutting/welding cage with a series-oriented clamping device for welding all stator geometries
  • Patented inline process control for automated documentation of all welds
  • Trumpf Laser with Scansonic Optics, 6 kW

Impregnation and powder coating

  • Series-oriented machine for drip and powder coating with automatic conveyance; the process can be transferred to a production line machine
  • Inductive heating and/or convective heating
  • Modular tools; no manual nozzle replacement required
  • Small-batch production with high throughput thanks to multi-station setups
  • Quick resin change
  • Custom materials based on customer requirements

Cast joining

  • Force- distance monitoring
  • CNC joining system with a modular gripper and fixture
  • Process evaluation using a force measurement platform, temperature sensors and a thermal imaging camera
  • Uniform heating, ready for casting

Vacuum potting

  • Two-Component vacuum potting
  • Specifically designed for Lambdapox material with a thermal conductivity of up to 8 W/mK
  • Also suitable for smaller quantities
  • Suitable for mass production

Electrical Testing

Measurement and inspection of stators using various testing methods

  • HV test
  • Surge Voltage Test
  • Insulation Test
  • Resistance Test

Quality Control

  • Gehring Inspection System – GIS
  • Laser triangulation measurement of all critical dimensions
  • Measurements can be taken after each process step
  • Documentation for each component

Winding Designer – Efficient Modeling of Winding Designs

We develop hairpin, I-pin, and X-pin windings from start to finish. You’ll receive the finished design, including all available data. Here’s how we make it possible: We determine the winding topology while taking your manufacturing constraints into account. The model runs so quickly that your design question is answered even as you’re asking it.

Precision redefined with the Gehring Inspection System

The Gehring Inspection System (GIS) enables precise measurements as a stand-alone or inline solution, from prototype production through to mass production. Through fast inspection processes, comparison with models or golden samples, and targeted feature extraction, relevant manufacturing characteristics for every production step in stator manufacturing are identified early, allowing processes to be efficiently optimized.
Transparent pin evaluation with Gehring Pin Studio Online for maximum quality and process reliability.

Innovative Solutions @ Gehring

Ultra Short / Mini Pin and X-Pin

Advantages:

  • More compact design due to reduced height
  • Material and cost savings due to reduced copper requirements
  • Higher electrical power thanks to optimized geometry

Special Features:

  • Higher precision requirements for the following processes: forming, winding, joining, stretching, and twisting
  • A shorter stripped section makes it harder to secure the wire during welding
  • Laser welding technology must be more precise and reliable

We are your partner

If you are looking for a reliable partner for your stator manufacturing projects, then you have come to the right place. We look forward to working with you. Contact us today to learn more.

Contact

Sales E-Mobility


  • +49 711 / 3405-0

  • sales.eu@gehring-group.com