WO2019155484A1 - Système de distribution de liquide de refroidissement intelligent dans des machines à commande numérique par calculateur - Google Patents

Système de distribution de liquide de refroidissement intelligent dans des machines à commande numérique par calculateur Download PDF

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Publication number
WO2019155484A1
WO2019155484A1 PCT/IN2018/050697 IN2018050697W WO2019155484A1 WO 2019155484 A1 WO2019155484 A1 WO 2019155484A1 IN 2018050697 W IN2018050697 W IN 2018050697W WO 2019155484 A1 WO2019155484 A1 WO 2019155484A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
tool
flow control
tools
flow
Prior art date
Application number
PCT/IN2018/050697
Other languages
English (en)
Inventor
Siddhant Sarup
Gaurav Sarup
Prashant Sarup
Original Assignee
SARUP Siddhant
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 SARUP Siddhant filed Critical SARUP Siddhant
Publication of WO2019155484A1 publication Critical patent/WO2019155484A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
    • 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
    • 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
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
    • B23Q39/021—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
    • B23Q39/022—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder
    • B23Q39/024—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder consecutive working of toolheads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/142—Valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50248—Control position of coolant nozzle as function of selected tool

Definitions

  • the present invention is generally related to coolant delivery systems in CNC machines. More particularly, the present invention is related to a method and system of flow of coolant in ‘Gang tooling’ type of CNC lathe machines.
  • CNC lathe machines are widely used for manufacturing parts or components, since these machines automate the manufacturing process by implementing computer generated design and directives. Minimizing the human control and supervision, CNC machines are faster and efficient to use.
  • To execute more than one tooling functions in a CNC lathe machine ‘gang tooling’ methods are being utilized; where multiple tools are mounted on toolplate, mounted on the cross slide. Continuous working of the tools produces heat that may hamper the tool productivity and life, and also part quality.
  • coolant delivery systems are also equipped with the gang tooling on CNC lathe machines to cool off the working zones. Another advantage of delivering a coolant around the working zones is chip removal and reducing any complications occurring from chip clogging.
  • Various methods are developed to have efficient coolant delivery systems.
  • FIG. 1A illustrates a system of CNC manufacturing process including a CNC lathe gang tool equipped with a smart coolant delivery system, in accordance with an embodiment of the present invention
  • FIG. 2 shows a flow chart illustrating a cooling method implemented in a manufacturing process using a CNC lathe gang tool with a smart coolant delivery system, in accordance with an embodiment of the present invention.
  • the present invention discloses a smart coolant delivery system in ‘gang tooling’ methods for CNC lathe machines.
  • the coolant delivery system is operated by a programmable logic control (abbreviated as PLC) which is executed by a CNC controller.
  • the delivery system comprises a control valve associated to each tool equipped in the gang tooling.
  • the valves control the flow of coolant to the tools and are actuated by the PLC.
  • the valve associated with the tool also gets activated by the logic. This in turn, allows the coolant to flow through the valve via a tool base plate and reaches the tool working zone/site.
  • the coolant cools off the working zone.
  • the coolant delivery system ensures that the coolant reaches to that tool only which is operating currently. Such activating of the particular valve for the particular operating tool only employs full flow rate and pressure of coolant pump to deliver the coolant to the currently operating tool.
  • the coolant delivery system 104 comprises a coolant main line 110, a coolant channel 112, 8 control valves (V1-V8), 8 coolant connecting lines (C1-C8) that connect the control valves with the tools blocks, and coolant flow lines 114 for delivering the coolant to the tool working zones.
  • the coolant main line 110 provides the coolant to the coolant delivery system 104, whereas the coolant channel 112 channelizes the coolant to each valve (VI -V8).
  • Every tool block (T1-T8) is connected with its own control valve (V1-V8) via a corresponding coolant connecting line (C1-C8).
  • This means the environment 100 has an equal number of tools and tool blocks associated with an equal number of control valves.
  • the coolant delivery system 102 may have more or less than 8 control valves and tool blocks, depending/not depending on the number of gang tools in the CNC lathe, without deviating from the meaning and scope of the present invention.
  • the exemplary environment 100 may have a different number of tool blocks and control valves and not necessarily being equal, depending on the design and requirement of the system, without deviating from the meaning and scope of the present invention.
  • the control valves (V1-V8) open and close the coolant connecting lines (C1-C8) to allow or prevent the coolant from flowing to the tool blocks (T1-T8).
  • the coolant flow lines 114 deliver the coolant to discharge from the required tool block (T1-T8) and eventually reach the required tool 106 working zones for cooling them off.
  • the coolant delivery system 104 is controlled by a PLC logic executed by a CNC controller (not shown in the FIG. 1).
  • the CNC controller executing pre-programmed sequences of machine control commands, also automates the operation of the tools 106.
  • the coolant delivery system 104 uses any fluid that effectively reduces the temperature of the tool working zone/site.
  • the coolant is high- pressured stream of air.
  • the coolant is any cool liquid that reduces the temperature, such as cold water, or may be other suitable liquid coolant.
  • the coolant may also depend on the type of tools used in the gang tooling.
  • the process 100 may employ operation of two or more tools simultaneously, while also actuating the corresponding two or more control valves, depending on the requirement of the manufacturing process, without deviating from the meaning and scope of the present invention.
  • the coolant delivery system 104 may also be installed with any other CNC machine, depending on the workability of the coolant delivery system 104 with the CNC machine in question, without deviating from the meaning and scope of the present invention.
  • FIG. 2 shows a flow chart illustrating a coolant delivery method implemented in a manufacturing process using a CNC lathe gang tool with a smart coolant delivery system, in accordance with an embodiment of the present invention.
  • a CNC controller controls the operation of the tools, by executing a PLC logic which includes a programmed sequence of machine control commands.
  • the CNC controller instructs a required tool to start its operation, as and when required in the manufacturing process, at step 202.
  • the CNC lathe gang tools 106 is equipped with the smart coolant delivery system 104, which further comprises a number of control valves corresponding to the number of tool blocks mounted on a tool base plate in the CNC lathe machine.
  • the controller After commanding the required tool to operate, the controller, running the PLC logic, also actuates a control valve that is linked with that tool only, at step 204.
  • the control valves are connected with their corresponding tool blocks via a number of coolant connecting lines to allow flow of coolant. Therefore, when the linked control valve activates at step 204, it further allows the corresponding coolant connecting line to open up a channel for the coolant to flow from the linked control valve to the particular operating tool block, at step 206. Thereafter, the coolant flows through a coolant flow line which is inside the tool base plate 108, at step 208. Consequently, the coolant discharges from the designated tool block T1-T8, to finally reach the operating tool site, at step 210. Adopting this method, the control valve ensures flow of coolant to the required tool only which is in operation. Further, providing full flow rate and pressure of coolant to that tool only, without compromising with the flow rate and pressure.
  • the present invention provides a smartly controlled coolant delivery system that comprises actuating control valves associated with gang tools, as and when required, to allow flow of coolant. Adopting the present invention and activating only that control valve which is linked with the tool under operation, to allow the delivery of the coolant only to the operating tool, ensures full flow rate and pressure of pump to deliver the coolant to that particular operating tool. This effectively results in increasing the tool life & increasing machining parameters. Further, in case of using drills as one of the tools, the present invention prevents pre-mature failure of the drills which may be caused by chip clogging; where chip clogging may happen due to inadequate coolant pressure and flow rate.
  • the smart coolant delivery system also enables use of high pressure coolant in gang tooling machines to achieve very high machining parameters and allowing breaking of chips into small pieces. Whereas, high pressure coolant cannot be used in the conventional coolant delivery systems due dissipation of pressure through multiple outlets in multiple blocks. Further, the present invention enables use of‘through coolant’ tools, such as drills on gang tooling machines. Since‘through coolant’ tools need coolant to be delivered only through them as they have narrow orifices and if coolant is also flowing from nearby blocks (which have bigger holes) then most of the coolant will drain away from bigger holes and‘through coolant’ tools may fail.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

La présente invention concerne un système de distribution de liquide de refroidissement à commande intelligente destiné à être mis en œuvre avec des "outils multiples" pour des machines de tour à commande numérique par calculateur (CNC). Le système comprend un certain nombre de soupapes de commande ; chacune étant associée et raccordée à un bloc d'outil monté sur la plaque de base d'outil par l'intermédiaire de lignes de raccordement de liquide de refroidissement. Le système de distribution commande le fonctionnement de soupapes à l'aide d'une logique PLC exécutée par un dispositif de commande à CNC. La logique, lorsqu'elle amène un outil à fonctionner, actionne également la soupape de commande associée à l'outil uniquement. Par conséquent, le liquide de refroidissement s'écoule à travers la soupape de commande uniquement, pour atteindre la zone de travail de l'outil de fonctionnement. Le reste des soupapes de commande reste désactivé, ce qui permet d'éviter l'écoulement de liquide de refroidissement vers des outils autres que de fonctionnement. Le système assure qu'un débit et une pression maximaux du liquide de refroidissement atteignent un outil de fonctionnement, et évite ainsi l'engorgement de copeaux et le gaspillage de liquide de refroidissement.
PCT/IN2018/050697 2018-02-12 2018-10-30 Système de distribution de liquide de refroidissement intelligent dans des machines à commande numérique par calculateur WO2019155484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201811005229 2018-02-12
IN201811005229 2018-02-12

Publications (1)

Publication Number Publication Date
WO2019155484A1 true WO2019155484A1 (fr) 2019-08-15

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6425715B1 (en) * 1998-10-23 2002-07-30 Brookdale Associates Machine tool accessory high pressure fluid distribution system
KR20040068529A (ko) * 2004-07-14 2004-07-31 윤홍근 씨엔씨 선반의 절삭유 분사장치 및 그 분사방법

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6425715B1 (en) * 1998-10-23 2002-07-30 Brookdale Associates Machine tool accessory high pressure fluid distribution system
KR20040068529A (ko) * 2004-07-14 2004-07-31 윤홍근 씨엔씨 선반의 절삭유 분사장치 및 그 분사방법

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