Revolutie din miez: racirea axului principal

Hartford, in colaborare cu PMC, a dezvoltat tehnologia Shaft-Cooling Built-in Spindle — o inovatie care rezolva una dintre cele mai persistente provocari din prelucrarea CNC de precizie: deformarea termica a axului principal.

Problema

In centrele de prelucrare conventionale, axul principal genereaza caldura semnificativa in zona rotorului motorului si a rulmentilor. Aceasta caldura se proaga in structura masinii, provocand dilatari termice care afecteaza direct precizia geometrica a pieselor prelucrate. Inainte de aceasta inovatie, operatorii trebuiau sa lase masina sa functioneze 37-40 de minute in gol pentru a atinge temperatura de regim stabil.

Solutia Hartford

Spre deosebire de sistemele de racire externa, noua tehnologie canalizeaza agentul de racire direct prin miezul axului principal, in imediata apropiere a surselor de caldura - rotorul motorului si rulmntii. Aceasta minimizeaza diferentialul de temperatura intre interiorul si exteriorul axului pe tot parcursul functionarii.

Rezultate masurate

  • Reducerea timpului de incalzire: de la 37-40 minute la aproximativ 3 minute — imbunatatire de 90%
  • Controlul deformarii termice: ≤ 5 micrometri pe tot parcursul schimbului
  • Stabilitate la turatie: atinsa chiar si la aproximativ 75% din turatia maxima a axului

Aplicatii industriale

  • Vehicule electrice: carcase de motoare electrice si componente structurale cu geometrii complexe
  • Aerospational: piese structurale din titan si aliaje speciale care necesita precizie dimensionala pe toata durata operatiilor indelungate
  • Matriterie 3C: matrite de precizie pentru electronice de consum — elimina erorile cauzate de ciclurile termice repetate

Concluzie

Aceasta inovatie schimba fundamental parametrii de productivitate: masina este pregatita de lucru in 3 minute, nu 40, iar precizia ramane constanta pe tot parcursul schimbului — indiferent de durata operatiei sau de turatia axului.

Revolution from the Core: Spindle Cooling Technology

Hartford, in collaboration with PMC, has developed the Shaft-Cooling Built-in Spindle Technology — an innovation that solves one of the most persistent challenges in precision CNC machining: thermal displacement of the main spindle.

The Problem

In conventional machining centers, the main spindle generates significant heat at the motor rotor and bearing zones. This heat propagates through the machine structure, causing thermal expansions that directly affect the geometric accuracy of machined parts. Before this innovation, operators had to run the machine at idle for 37–40 minutes to reach stable operating temperature.

Hartford's Solution

Unlike external cooling systems, the new technology channels coolant directly through the spindle core, in close proximity to the heat sources — the motor rotor and bearings. This minimizes the temperature differential between the interior and exterior of the spindle throughout operation.

Measured Results

  • Warm-up time reduction: from 37–40 minutes to approximately 3 minutes — 90% improvement
  • Thermal deformation control: ≤ 5 micrometers throughout the shift
  • Spindle stability: achieved even at approximately 75% of maximum spindle speed

Industrial Applications

  • Electric vehicles: electric motor housings and structural components with complex geometries
  • Aerospace: structural parts from titanium and special alloys requiring dimensional precision throughout extended operations
  • 3C Moldmaking: precision molds for consumer electronics — eliminates errors caused by repeated thermal cycling

Conclusion

This innovation fundamentally changes productivity parameters: the machine is ready to work in 3 minutes instead of 40, and accuracy remains consistent throughout the entire shift — regardless of operation duration or spindle speed.