WO2015006846A1 - Porte-outils à système interne de transfert de chaleur avec fluide en changement de phase - Google Patents

Porte-outils à système interne de transfert de chaleur avec fluide en changement de phase Download PDF

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Publication number
WO2015006846A1
WO2015006846A1 PCT/BR2014/000239 BR2014000239W WO2015006846A1 WO 2015006846 A1 WO2015006846 A1 WO 2015006846A1 BR 2014000239 W BR2014000239 W BR 2014000239W WO 2015006846 A1 WO2015006846 A1 WO 2015006846A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool holder
tool
tools
machining
fluid
Prior art date
Application number
PCT/BR2014/000239
Other languages
English (en)
Portuguese (pt)
Other versions
WO2015006846A8 (fr
Inventor
Arthur Alves FIOCCHI
Luiz Eduardo de ÂNGELO SANCHEZ
Rubens Roberto INGRACI NETO
Vicente Luiz SCALON
Original Assignee
Universidade Estadual Paulista "Julio De Mesquita Filjho"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universidade Estadual Paulista "Julio De Mesquita Filjho" filed Critical Universidade Estadual Paulista "Julio De Mesquita Filjho"
Publication of WO2015006846A1 publication Critical patent/WO2015006846A1/fr
Publication of WO2015006846A8 publication Critical patent/WO2015006846A8/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
    • B23Q11/1061—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using cutting liquids with specially selected composition or state of aggregation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/10—Cutting tools with special provision for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
    • B23Q11/141—Methods or arrangements for maintaining a constant temperature in parts of machine tools using a closed fluid circuit for cooling or heating

Definitions

  • the present invention relates to a tool holder with internal phase-shifting fluid heat transfer system comprising a cutting tool holder acting as a heat exchanger to assist in dissipating the thermal energy generated in machining processes.
  • the mechanical industry uses the material removal machining process to shape the parts, that is, to manufacture them to precise measurements.
  • the cutting tool is usually fixed to a holder known as a tool holder which in turn is attached to the machining machine tool.
  • the tool used for this removal or cutting process is generally made of a more mechanically resistant material than the part material. Even so, the tool suffers wear, mainly due to heating during the removal process, causing it to deteriorate and lose the cutting capacity, leading to its destruction; This characterizes the critical situation commonly referred to as "end of life”.
  • cutting fluid a coolant, known as cutting fluid
  • This cutting fluid consists essentially of water, but also chemicals, to minimize part and machine tool oxidation, improve lubricity and cooling capacity, and bactericides, to prevent proliferation of living agents, among other types. of additives.
  • heat generation in the ZCP affects distribution throughout the system. It can be said that the increase in temperature at the tool outlet surface is due to the combined effect of heat generated on the ZCP and ZCS, not each one individually.
  • thermal properties of the tool and workpiece thermal conductivity
  • mechanical properties of the material mechanical properties of the material
  • the tribological conditions the length of the chip contact and the cutting parameters are also key parameters in the heat dissipation distribution. generated.
  • heating in the machining process basically leads to four undesirable operating results: deformation of the part; coloration on machined surface; falsification of workpiece measurements, where there is a discrepancy between measurements made during and after the tool action due to the heat generated; and difficulty for the operator to handle the machined part, ie remove it from the machine, transport it etc.
  • Document PI0901570-1 features a tool holder provided with a damping means that eliminates the vibratory effects due to cutting forces and machining speeds.
  • this invention does not address the issue of heat transfer, or cooling, required for the machining operation.
  • a rotary tool holder is described in document PI0507046-5, which allows the tool to rotate at its end.
  • the patent does not address the influence of refrigeration on the machining operation.
  • CA2645860 deals with a tool holder with internal cavities allowing the insertion of a cartridge-like device into it as well as the circulation of cutting fluid.
  • This cartridge is used as a container for monitoring sensors such as vibration, stress and temperature measurement as well as damping system for the cutting tool.
  • the internal cavities have the function of accommodating the cartridge and, unlike the common devices that use damping system, allow the cutting fluid to pass through the body of the tool holder.
  • This cutting fluid is therefore applied in a manner conventional, that is, it is sprayed through a jet-shaped nozzle over the cutting interface.
  • This invention does not deal with the extraction of heat conducted by the cutting tool by evaporation of the coolant within the tool holder.
  • the technique described in this document allows the construction of a structural and functional device to support one or more cutting tools and which has internal channels for fluid circulation, promoting heat removal by fluid phase change.
  • the object of the present invention is, in particular, to reduce the temperature in the cutting region by removing heat through the cutting tool with the aid of a phase-shifting fluid-circulating tool holder. This minimizes the application of cutting fluid to the machining process as hydrocarbon-based ones are deteriorated and should not be disposed of in the environment as it is a chemical harmful to human health. action considered an environmental crime if it is done.
  • the invention relates to a tool holder with an internal phase-shifting fluid heat transfer system composed of a structural body, called a tool holder, which has internal channels near or within the cutting tool for refrigerant circulation.
  • the body of the tool holder may be made of ceramic, cast iron, stainless steel, high speed steel, mechanical steel, hard metal, carbon steel, whether or not heat treated, or other metallic, ceramic, polymeric, composite materials, among others;
  • an interface between the tool and the holder cavity tools can be introduced to aid heat transfer, made of electrolytic copper, hardened or not, aluminum, silver, gold, graphene, superconducting ceramics or other good heat conducting material;
  • the tool When the tool has a clamping hole, it can be filled with a cylindrical pin of conductive material to increase heat removal, and its fixation in the tool holder by interfering adjustment, welding or mechanical compression;
  • phenolic polymeric resin, epoxy, polyethylene or the like may be used, a welded joint with or without addition material, interfering fit, sealing rings or joints or threaded joints;
  • connection channels between the tool holder internal circuit, the pressurization system and the heat exchanger may be made of polymeric resin, metal ducts or other materials inert to the fluid used.
  • Figure 1 shows the technical drawing in section of the tool holder (1), with the cutting tool (2) coupled by the clamp (5), and the external connections through which the fluid circulates.
  • Figure 2 shows schematically the cooling system comprising the tool holder (1), the heat exchanger (12), the pump (13) and the connection channels.
  • Figure 3 represents the thermal flux generated in a thermal operation. machining through the cutting tool and the conductive interface, leading the fluid to the phase change.
  • the tool holder (1) has below the cutting tool (2) a chamber (3) in which the heat generated by the cutting process causes the internally circulating refrigerant to evaporate. Steam leaves the tool holder through the inner channel (4).
  • the cutting tool (2) is fixed by a clamp (5) which has its tightening torque given by a screw (6) attached to the tool holder (1).
  • an interface (7) of material with high thermal conductivity such as copper can be included in order to promote heat exchange. between cutting tool (2) and fluid.
  • Fluid enters the chamber (3) through the fitting (8) and leaves the tool holder through the fitting (10). Connections can be threaded, welded, inserted by interfering fit, or even glued to the toolholder frame (1).
  • the fluid flows through the external heat transfer and pressurization systems and enters the tool holder (1) through the connection channel (9), and exits the tool holder (1) through the connection channel (11).
  • the refrigerant after its total or partial evaporation, due to the transfer of heat generated in the machining process, leaves the tool holder (1) through the connection (10) and goes through the connection channel (1). to the heat exchanger (12) within which it is condensed.
  • the fluid in the liquid phase flows to the pump (13), which forces its circulation into the tool holder (1) through the connection channel (9).
  • the refrigeration system operates in a steady state, with continuous flow of fluid through the interior of the tool holder, heat exchanger and pressurization system.
  • Figure 3 shows the working principle of the tool holder internal cooling system (1).
  • the thermal energy generated during the cutting process of the part (14) forming the chip (15) is transferred through the cutting tool (2) and the conductive interface (7) to the coolant inside the chamber (3), absorbing this thermal energy vaporizes partially or totally.
  • the heated fluid leaves the tool holder, circulating through the inner channel (4), to the connection channel (11), from where it goes to the heat exchange and pressurization system shown in figure (2).
  • the tool holder or the tool itself may be manufactured to utilize heat exchange enhancing technologies such as ultrasonic agitation, micro-channel flow, fin surfaces and porous media in coil-shaped geometries and any other techniques to the same end. Also, during its manufacture characteristics can be inserted that allow changes in the system pressure - such as variations in the diameter of the channel (4) - so that the refrigerant changes phase in different temperatures, favoring the heat exchange. Differentiated geometries are used to make the evaporation chamber in order to direct and regulate the flow of the fluid jet that enters the tool holder. At the outlet of said chamber of the tool holder, other differentiated geometries ensure the steam output towards the heat transfer system.
  • heat exchange enhancing technologies such as ultrasonic agitation, micro-channel flow, fin surfaces and porous media in coil-shaped geometries and any other techniques to the same end.
  • characteristics can be inserted that allow changes in the system pressure - such as variations in the diameter of the channel (4) - so that the refrigerant changes phase
  • the circulation of fluid within the tool holder or the tool itself may be forced or natural convection based and therefore utilize the effects of density variation with evaporation and / or heating for fluid movement in the system.
  • the thermal contact resistance between the tool and the tool holder can be reduced by applying thermal paste, increased flatness, decreased roughness or any surface treatment for this purpose.
  • An example of application is the machining of automotive and aeronautical parts of difficult-to-alloy alloy steels. This is due to the large thermal energy generation, high shear stresses, low thermal conductivity of these materials and high tool wear rate, as well as the intrinsic need to maintain design criteria such as dimensions and surface finish.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Drilling Tools (AREA)

Abstract

Le présent brevet d'invention concerne un porte-outils avec corps structural contenant un système interne de canaux par lequel circule un fluide qui change de phase lors de la réception de l'énergie thermique produite pendant l'usinage, transmise par l'intermédiaire de l'outil ; l'invention vise à extraire la chaleur produite au cours du procédé, prolongeant ainsi la vie de l'outil de coupe et favorisant le maintien de la qualité de la pièce produite.
PCT/BR2014/000239 2013-07-17 2014-07-16 Porte-outils à système interne de transfert de chaleur avec fluide en changement de phase WO2015006846A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR1020130181897 2013-07-17
BR102013018189-7A BR102013018189B1 (pt) 2013-07-17 2013-07-17 porta-ferramentas com sistema interno de transferência de calor com fluido em mudança de fase para resfriamento de ferramenta de corte

Publications (2)

Publication Number Publication Date
WO2015006846A1 true WO2015006846A1 (fr) 2015-01-22
WO2015006846A8 WO2015006846A8 (fr) 2015-03-19

Family

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Application Number Title Priority Date Filing Date
PCT/BR2014/000239 WO2015006846A1 (fr) 2013-07-17 2014-07-16 Porte-outils à système interne de transfert de chaleur avec fluide en changement de phase

Country Status (2)

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BR (1) BR102013018189B1 (fr)
WO (1) WO2015006846A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016117059A1 (de) 2016-09-12 2018-03-15 H&H Gerätebau Gmbh Zerspanungswerkzeug, Werkzeuganordnung und Schneidelement-Temperierverfahren
WO2018095468A1 (fr) * 2016-11-25 2018-05-31 Schaeffler Technologies AG & Co. KG Agencement d'outil présentant un corps de coupe, procédé pour le refroidissement du corps de coupe ainsi qu'utilisation du corps de coupe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648113B (zh) * 2020-05-25 2021-08-27 安徽工业大学 一种自冷却防熔融裁刀

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1173190A (fr) * 1956-11-28 1959-02-20 Usinage à froid et à chaud des métaux avec outils à refroidissement intérieur et ses applications
US3664412A (en) * 1968-04-04 1972-05-23 Neal P Jeffries Cooling system for cutting tool and the like
US5799553A (en) * 1995-02-08 1998-09-01 University Of Connecticut Apparatus for environmentally safe cooling of cutting tools
DE19730539C1 (de) * 1997-07-16 1999-04-08 Fraunhofer Ges Forschung Drehmeißel
EP1199126A1 (fr) * 2000-03-03 2002-04-24 Masao Murakawa Pointe jetable anticalorique et outil jetable anticalorique comportant une telle point jetable
US20080279644A1 (en) * 2007-05-09 2008-11-13 Board Of Control Of Michigan Technologycal University Cutting tool insert having internal microduct for coolant
US20100254772A1 (en) * 2009-04-06 2010-10-07 Jay Christopher Rozzi Indirect Cooling of a Cutting Tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1173190A (fr) * 1956-11-28 1959-02-20 Usinage à froid et à chaud des métaux avec outils à refroidissement intérieur et ses applications
US3664412A (en) * 1968-04-04 1972-05-23 Neal P Jeffries Cooling system for cutting tool and the like
US5799553A (en) * 1995-02-08 1998-09-01 University Of Connecticut Apparatus for environmentally safe cooling of cutting tools
DE19730539C1 (de) * 1997-07-16 1999-04-08 Fraunhofer Ges Forschung Drehmeißel
EP1199126A1 (fr) * 2000-03-03 2002-04-24 Masao Murakawa Pointe jetable anticalorique et outil jetable anticalorique comportant une telle point jetable
US20080279644A1 (en) * 2007-05-09 2008-11-13 Board Of Control Of Michigan Technologycal University Cutting tool insert having internal microduct for coolant
US20100254772A1 (en) * 2009-04-06 2010-10-07 Jay Christopher Rozzi Indirect Cooling of a Cutting Tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016117059A1 (de) 2016-09-12 2018-03-15 H&H Gerätebau Gmbh Zerspanungswerkzeug, Werkzeuganordnung und Schneidelement-Temperierverfahren
WO2018095468A1 (fr) * 2016-11-25 2018-05-31 Schaeffler Technologies AG & Co. KG Agencement d'outil présentant un corps de coupe, procédé pour le refroidissement du corps de coupe ainsi qu'utilisation du corps de coupe

Also Published As

Publication number Publication date
BR102013018189A2 (pt) 2016-09-27
WO2015006846A8 (fr) 2015-03-19
BR102013018189B1 (pt) 2021-02-23

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