Automotive

WIRE BENDING PARTS

WIRE BENDING PARTS ARE PRODUCED IN NEARLY ALL TYPES ACCORDING TO CUSTOMER REQUIREMENTS AND DRAWINGS


Function: Mechanical reset to the initital position after activation Description: Improved operating comfort through spring load assistance for mechanical adjustment of seats, backrests, hatches and locks.

Advantages

  • High power and torque transmission in a small installation space 
  • Geometry can be flexibly adapted to the installation space

Innovation

  • Calculation of torques even with complex geometry
  • Increase of lifetime thanks to special production processes

Production

  • CNC controlled bending head machines
  • multi-slide machines with permanent tools
  • processing of round wire and shaped wire
  • surface coating according to customer requirement

Automotive

TORSION SPRING

Torsion springs are coiled or wound wire springs.


Function: Torsion springs are used as energy storage like other springs. They are often used for camshaft adjuster systems or for resetting hatches. Description: The purpose of this type of spring is versatile. Torsion springs can be loaded in opening as well as in closing direction. In case of closing load hooks or legs are necessary to introduce the torque into the spring. In case of opening load there is no need of legs because the torque introduction takes place via the cutting edge of the spring wire.

Advantages

  • High reliability under static and dynamic loads
  • Large range of variants and dimensions available
  • Cost-effective manufacturing
  • High application knowledge which can be transferred into the spring design.

Innovation

  • Development of a cutting method for the production of a plane cutting edge which is perpendicular to the wire axis (EOS process)
  • Development of a stress-optimized production for springs loaded in opening direction which allows a material saving of up to 30% compared to standard springs.
  • Development of an extensive calculation program for dynamic design of torsion springs, including assembly simulation (SpringDesigner)

Production

  • In-house machine construction supports in case of automated production processes and produces special solutions to increase the performance of torsion springs
  • In-house prototype shop
  • Fatigue strength tests
  • In-house process development

Automotive

COMPRESSION SPRING

COMPRESSION SPRINGS ARE CHARACTERIZED BY A COMBINATION OF MATERIAL, PRODUCTION DEPTH AS WELL AS THE ABILITY TO MANAGE EXTREME REQUIREMENTS


Function: Compression springs are versatile spring elements used in numerous applications as an energy storage or reset function. The spring element have a high energy utilization ratio. Description: Compression springs are used in the following applications: Injection systems (pumps and injectors), torsional damper systems (DMF, clutch and converter damping springs), shock absorbers, brake systems (ABS, ESP, brake actuators), transmission control, belt and chain tensioning systems, oil pumps.

Advantages

  • High energy efficiency
  • Cost effective manufacturing
  • Large range of variants and dimensions available
  • Use of special treatments (e.g. heat treatments and coatings)
  • High application knowledge which can be transferred into the spring design.

Innovation

  • Development of stress-optimized manufacturing (SOF)
  • Development of nitriding treatments for wear protection and lifetime enhancement
  • Development of springs optimized in terms of transverse force
  • DMC laser coding
  • Development of a comprehensive calculation program for the dynamic design of compression springs (SpringDesigner).

Production

  • In-house mechanical engineering supports automated production processes and manufactures special solutions for increasing the performance of compression springs
  • In-house prototype shop
  • In-house process development

Automotive Industry

HOSE CLAMPS

Hose clamps are assembled in servo systems, fuel systems and intake air systems.


Function: Hose clamps are used in vehicles to connect hoses and nozzles in air conditioning systems, servo systems and injection systems. Description: Hose clamps are self-adjusting fixing elements. Especially in the automobile there are many technical arrangements which are connected to each other by hose and socket. These connections must comply with the high requirements of the OEMs.

Advantages

  • Uniform surface pressure due to perfect roundness
  • Self-adjusting effect

Innovation

  • Optimum corrosion protection due to coating
  • Preloaded hose clamp with various locking systems

Production

  • Dynamic simulation
  • In-house prototype shop

Automotive Industry

PISTON RING EXPANDER

IN THE PRODUCTION OF PISTON RING EXPANDERS SCHERDEL IS A TECHNOLOGICAL PIONEER AND GLOBAL MARKET LEADER


Function: In the engine, the piston ring spring, together with the oil scraper ring, seals the cylinder against hot combustion gases in the crankcase and from too much oil in the combustion chamber, and thus regulates the oil balance, fuel consumption, exhaust gas balance and, in part, the lifetime of the engine. Description: The piston ring expanders are long compression springs with very small outer diameter and optionally different coil distances. The spring is closed with a latch pin to get its round shape. It is preferably used in diesel engines but also applied in gasoline engines.

Advantages

  • Many years of experience in production and design
  • International structures
  • Very small spring index
  • Relaxation resistance
  • Diameter of 45–1000mm
  • Wear protection options

Innovation

  • Gas-nitrided, hard surface for stainless steel
  • Partial nitrating
  • Small diameters with high loads

Production

  • Individual design and development
  • Almost all options can be produced in-house
  • Wear test
  • Relaxation tests
  • Special machines developed in-house

Automotive

CONSTANT FORCE AND POWER SPRINGS

SPIRALLY COILED METAL STRIP


Function: Return springs in the field of door locking systems Description: Power springs serve among other things to reset electric motors in electromechanically operated locks of car side doors

Advantages

  • Various mechanical components in the system can be omitted
  • Power springs create a flat torque characteristic
  • Triebfedern haben einen großen Arbeitsbereich
  • Use as maintenance-free system possible

Innovation

  • Material edge processing which is mandatory for the function of the locking system could be developed together with the material supplier
  • Poduction of difficult spring geometries without the use of an inductive annealing process in certain areas of the power spring

Production

  • Cross-curved production process is applied
  • Compliance with very strict tolerance frames during production
  • Use of robot handling systems
  • 100% camera measurement of individual characteristics during assembly
  • Assembly of individual components

Automotive

SPIRAL SPRINGS

SPIRAL SPRINGS FOR CAM SHAFT ADJUSTER WERE ACCOMPANIED FROM PRODUCTION TO MARKET MATURITY


Function: Return springs in the area of cam shaft adjustment. Description: Return springs increases the cam shaft adjustment speed and puts the cam shaft adjuster in an optimal position for the engine starting process. Spiral springs are exposed to high dynamic loads in the application and must therefore be optimally designed and manufactured in close tolerances. 

Advantages

  • Increase of the adjustment speed in NWV systems
  • Flexible production possible with regard to geometry

Innovation

  • A separate development directive for spiral springs has been created for design purposes
  • Preparation of exact friction models for simulation (FEM calculation)
  • Dynamic design is possible with the highest accuracy

Production

  • Combined production processes such as forming and shot peening
  • 100% camera measurement of individual characteristics
  • Use of inductive annealing process in specific areas of the spring
  • Production locations in Europe, USA, China

Automotive

DISC SPRING

DISC SPRING ARE SPRING ELEMENTS WITH BIG LOAD-DEFLECTION RATIO


Function: DISC SPRING ARE SPRING ELEMENTS WITH BIG LOAD-DEFLECTION RATIO Description: Disc springs make it possible to compensate large loads with a small travel distance for example as play compensation in transmission applications. By stacking disc springs in the same direction, the loads can be summed up. As stacking in opposite directions, a large deflection is summed up by stacking them with a constant load. Geometrical adjustments to the installation space can be made by internal and external interlocking.

Advantages

  • Small adjusting travel, high load
  • Material selection adjusted to the requirements
  • Degressive to load-decreasing characteristic curve

Innovation

  • Bainitic hardening
  • Fine-blanking process for disc production
  • Tempering of individual parts

Production

  • Forming simulation
  • In-house prototype shop
  • Fatigue strength tests
  • Relaxation tests

Automotive

VALVE SPRING

VALVE SPRINGS ARE HELICAL COMPRESSION SPRINGS FOR DYNAMIC STRESS UNDER INCREASED TEMPERATURE


Function: Control of valve movement in the valve train of an internal combustion engine Description: Valve springs are highly loaded components and therefore premium products specially designed to meet the customer requirements. An optimum development includes the individual kinematic analysis of the valve train, the static design of the spring taking into account the wire profile, material, spring shape, etc., as well as the dynamic precalculation or measurement of the valve train dynamics.

Advantages

  • Many years of experience
  • Large market share

Innovation

  • SOF process
  • DMC laser coding

Production

  • Dynamic simulation
  • In-house prototype shop
  • Fatigue strength tests
  • Relaxation tests

Automotive

WAVE SPRING

WAVE SPRINGS ARE COILED OR STAMPED ELASTIC PARTS


Function: Wave springs can almost always replace helical compression springs. They are often used in systems where a small axial spring length is required. Description: Wave springs are used very often for length compensation and pretensioning of bearings. The simplest form is a single layer wave spring ring which can have an open and a closed end. Mainly flat wire is used, especially for multi-layer wave springs. Single layer wave spring rings welded at the end are used in clutches.

Advantages

  • Very small axial assembly space (up to 50% less compared with helical compression springs)
  • Various design options
  • High application knowledge which can be transferred into the spring design.

Innovation

  • Development of a complex calculation program for the design of non- linear wave spring systems (SpringDesigner)
  • Highly efficient welding of wave spring rings by means of laser

Production

  • In-house machinery division supports automated production processes and provides special solutions for the production of wave springs
  • In-house process development

Automotive

Tension Springs

TENSION SPRINGS ARE COIL SPRINGS WHICH COUNTERACT THE AXIAL FORCE DIRECTED AT THE EXTENSION OF THE SPRING


Function: Tension springs belong to the group of coil springs, with the difference that the realization of an “Inner preload F0” is possible. Description: Tension springs are used in various areas of the vehicle. They can be found, for example, in access systems but also in braking and interior areas. Besides the actual spring design, the development competence for some applications also includes consideration of the associated kinematics.

Advantages

  • Very high initial tension FO
  • Defined setting losses in the function
  • 100% load control within the production process

Innovation

  • Realized as an assembly including all associated extension parts
  • Stress-optimized production

Production

  • Production of prototypes on series machines
  • Wide range of material dimensions and qualities