100% own production
The unrivalled quality of TES springs is ensured by:• using only the best raw materials,• adherence to procedures and standards,• high skills and experience of our staff,• state-of-the-art technologies,• certified European steel.
Before our springs reach the customer, they receive unique numbers and are then moved to our warehouse.The entire manufacturing process is rigorously controlled for quality and safety.
CUTTINGa flat bar is cut to dimensions indicated in the specifications.
ROLLINGa pre-programmed parabola is copied onto the leaf using a rolling machine.
HOLE DRILLINGholes for the central screw, caps, bumpers, etc. are made.
FORMING OF EYESopenings for bushing mounting are formed using a dedicated machine by the renowned Hauser brand.
BENDING OF ENDSthe ends are bent to ensure smooth leaf operation, particularly important.
HEATING OF LEAFSthe spring leafs are heated and annealed in the hardening temperature recommended for different spring steel types.
HARDENINGrapid cooling in hardening oil to achieve an appropriate structure ensuring improved hardness and strength, and reduced plasticity.
TEMPERINGheating and annealing in an appropriate hardened steel temperature to eliminate unfavorable features: residual stresses and considerable brittleness.
SHOT PEENINGthe spread surface of the leaf is impacted at high speed with cuttings of hard steel wire, in order to harden the surface, eliminate pores and pits, and prevent micro-cracking.
ASSEMBLYthe spring is equipped with bushings, bumpers, spacers, washers and other elements; the leafs are brought together by a pulling screw.
SETTING / SPRING RATE TESTINGfatigue strength of the spring is improved, and its spring rate is verified against design documentation.
PAINTING OF LEAFSthe spring is protected against corrosion by coating with a special paint.
PACKINGleafs and springs are placed on a pallet, secured with a tape and shipped to the customer.