US 11,951,579 B2
Device and method for cooling and lubricating tools in machining processes
Octavio Manuel Pereira Neto, Vizcaya (ES); Adrián Rodríguez Ezquerro, Vizcaya (ES); López De Lacalle Marcaide Luis, Vizcaya (ES); Franck Andrés Girot Mata, Vizcaya (ES); Mariluz Penalva Oscoz, Vizkaya (ES); and Rivero Rastrero Maria Asunción, Vizkaya (ES)
Appl. No. 16/305,006
Filed by UNIVERSIDAD DEL PAIS VASCO—EUSKAL HERRIKO UNIBERTSITATEA (UPV/EHU), Vizcaya (ES); and FUNDACIÓN TECNALIA RESEARCH & INNOVATION, Vizkaya (ES)
PCT Filed May 11, 2017, PCT No. PCT/EP2017/061412
§ 371(c)(1), (2) Date Nov. 27, 2018,
PCT Pub. No. WO2017/202622, PCT Pub. Date Nov. 30, 2017.
Claims priority of application No. 16382239 (EP), filed on May 27, 2016.
Prior Publication US 2019/0160618 A1, May 30, 2019
Int. Cl. B23Q 11/10 (2006.01); F16N 7/32 (2006.01); F16N 13/22 (2006.01)
CPC B23Q 11/1046 (2013.01) [B23Q 11/1061 (2013.01); B23Q 11/1084 (2013.01); F16N 7/32 (2013.01); F16N 13/22 (2013.01); F16N 2270/70 (2013.01); Y02P 70/10 (2015.11)] 13 Claims
 
1. A device for cooling and lubricating a tool during a chip removal machining process, wherein it comprises:
a first subsystem for cryogenic cooling that comprises: a first entry configured to introduce CO2 in liquid state in a first conduit of the device; a first exit configured to supply CO2 in liquid state from a second conduit of the device; a third conduit located between said first conduit and second conduit; and means for preventing the formation of dry ice in said first, second and third conduits, wherein said means for preventing the formation of dry ice in said first, second and third conduits are implemented by means of means for pressurizing said conduits above the triple point of the CO2 before injecting the CO2 in liquid state through the exit; wherein said means for pressurizing said first, second and third conduits above the triple point of the CO2 comprises a second entry configured to introduce CO2 in gaseous state in a fourth conduit of the device; a fifth conduit placed after said fourth conduit; a first solenoid valve configured to control the passage of CO2 in liquid state between the first conduit and the third conduit; a second solenoid valve configured to control the passage of CO2 in gaseous state between the fifth conduit and a sixth conduit; a first no-return valve disposed to communicate said first conduit and third conduit, so that when said first solenoid valve is closed, passage of CO2 in gaseous state is allowed from the third conduit towards the first conduit before introducing the CO2 in liquid state through the first entry; and a second no-return valve disposed to communicate said third and sixth conduit, so that when said second solenoid valve is open, circulation of the CO2 in gaseous state is allowed from the sixth conduit towards the first solenoid valve but not the other way around, impeding the advance of CO2 in liquid state towards the second solenoid valve;
a second subsystem for lubrication that comprises means for supplying micro-particles of a cutting oil in liquid state;
said first subsystem and second subsystem being independent from each other and said first subsystem and second subsystem being configured to operate both simultaneously or either one alone.