Programmable, variable volume and pressure, coolant system

• US 5,951,216 A
• Filed: 09/19/1997
• Issued: 09/14/1999
• Est. Priority Date: 09/19/1997
• Status: Expired due to Term

• Current Assignee: Gregory S. Antoun
• Original Assignee: Gregory S. Antoun
• Inventors: Antoun, Gregory S.
• Primary Examiner(s): Pitts, Andrea L.
• Assistant Examiner(s): CARTER, MONICA SMITH
• Application Number:
  US08/934,057
• Time in Patent Office: 725 Days
• Field of Search: 408/8, 408/56, 408/61, 409/136
• US Class Current: 408/56
• CPC Class Codes: B23Q 11/1015 by supplying a cutting liquid through the spindle
• CPC Class Codes: B23Q 11/1038 using cutting liquids with special characteristics, e.g. flow rate, quality
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
• CPC Class Codes: Y10T 408/44 with means to apply transient, fluent medium to work or product
• CPC Class Codes: Y10T 409/304032 Cutter or work

Abstract

A programmable, variable volume and pressure, coolant system regulating the amount of coolant flow to a cutting tool by controlling the speed of a coolant pump, and is comprised of a fluid control unit and an electrical control panel. The fluid control unit includes a pump and a AC pump motor operatively connected thereto. The electrical control panel includes: a power supply; circuit breakers; a computer; a variable frequency drive; control relays; and a junction block for making electrical connections to the control panel. The computer receives signals from the tool and a pressure transducer, and is programmed with information concerning the total flow area of the coolant orifices. Using this information, the computer determines an ideal pump speed, and sends a control signal to the variable frequency drive which in turn determines the pump motor speed. The coolant supply system also includes: a coolant supply line for routing coolant from the pump to the tool; a catch pan for collecting recycled coolant from the tool; a filter for removing impurities from the used coolant; a reservoir for storing coolant; and a return line for routing the recycled coolant to the reservoir and from the reservoir to the pump inlet.

Claims

1. A programmable, variable volume and pressure, coolant supply system comprising:

at least one fluid pressure transducer for monitoring coolant pressure;

a pump for providing coolant to at least one tool with at least one coolant orifice means, the orifice means having a flow area;

an electrical AC pump motor operatively connected to said pump;

a variable frequency drive electrically connected to said pump motor, said variable frequency drive providing AC power to said pump motor at various frequencies, to thereby control a speed of said pump motor; and

a computer, said computer monitoring the coolant pressure via said at least one fluid pressure transducer and being programmed with data related to the flow area of the orifice means; and

wherein

said computer determines a desired speed of said pump motor based on the coolant pressure and the flow area of the orifice means of the tool;

said computer controlling the variable frequency drive to provide said pump motor with AC power at a frequency that results in said pump motor running at the desired speed.

2. The coolant supply system as defined in claim 1, further comprising a coolant supply line, said coolant supply line extending between said pump outlet and the orifice means, to supply said coolant under pressure to the orifice means.

3. The coolant supply system as defined in claim 2, further comprising a coolant return line, said coolant return line extending between the tool and said pump inlet, for returning said coolant to said pump inlet after said coolant exits the orifice means.

4. The coolant supply system as defined in claim 3, further comprising a coolant reservoir in said coolant return line.

5. The coolant supply system as defined in claim 4, further comprising a coolant catch pan between the tool and said coolant return line, said coolant catch pan receiving said coolant exiting the orifice means and directing it into said coolant return line.

6. The coolant supply system as defined in claim 5, further comprising a coolant filter in said catch pan, to remove impurities from said coolant exiting the orifice means prior to directing said coolant into said coolant return line.

7. A fluid cooled, cutting tool system comprising at least one cutting tool having a coolant orifice means with a flow area for applying a coolant to said at least one tool, and a programmable, variable volume and pressure, coolant supply system, said coolant supply system comprising:

at least one fluid pressure transducer for monitoring the pressure of said coolant;

a pump having an inlet and an outlet, for providing pressurized coolant to said coolant orifice means;

an electrical AC pump motor operatively connected to said pump;

a variable frequency drive electrically connected to said pump motor, said variable frequency drive providing AC power to said pump motor at various frequencies, to thereby control a speed of said pump motor; and

a computer, said computer monitoring said coolant pressure via said at least one pressure transducer, and being programmed with data related to said flow area of said coolant orifice means; and

wherein

said computer determines a desired speed of said pump motor based on said coolant pressure and said flow area of said orifice means;

said computer controlling said variable frequency drive to provide said pump motor with AC power at a frequency that results in said pump motor running at said desired speed.

8. The fluid cooled, cutting tool system as defined in claim 7, wherein:

said coolant orifice means includes a plurality of orifices;

said flow area is a total flow area of said plurality of orifices; and

said computer determines said desired speed of said pump motor based on said coolant pressure and said total flow area of the plurality of orifices.

9. The fluid cooled, cutting tool system as defined in claim 8, further comprising a coolant supply line, said coolant supply line extending between said pump outlet and said orifice means, to supply said coolant under pressure to said orifice means.

10. The fluid cooled, cutting tool system as defined in claim 9, further comprising a coolant return line, said coolant return line extending between said at least one tool and said pump inlet, for returning said coolant to said pump inlet after said coolant exits said orifice means.

11. The fluid cooled, cutting tool system as defined in claim 10, further comprising a coolant reservoir in said coolant return line.

12. The fluid cooled, cutting tool system as defined in claim 11, further comprising a coolant catch pan between said at least one tool and said coolant return line, said coolant catch pan receiving said coolant exiting said orifice means and directing it into said coolant return line.

13. The fluid cooled, cutting tool system as defined in claim 12, further comprising a coolant filter in said catch pan, to remove impurities from said coolant exiting said orifice means prior to directing said coolant into said coolant return line.

14. A combination fluid cooled cutting tool and coolant supply system wherein the combination comprises:

a fluid cooled cutting tool comprising;

at least one coolant orifice having a total flow area for applying a coolant to said cutting tool; and

a programmable, variable volume and pressure coolant supply system comprising;

at least one fluid pressure transducer for monitoring the pressure of said coolant;

a pump having an inlet and an outlet for providing pressurized coolant to said coolant orifice;

an electrical AC pump motor operatively connected to said pump;

a coolant supply line, said coolant supply line extending between said pump outlet and said coolant orifice, to supply said coolant under pressure to said coolant orifice;

a coolant return line, said coolant return line extending between said cutting tool and said pump inlet, for returning said coolant to said pump inlet after said coolant exits said coolant orifice;

a coolant catch pan located between said cutting tool and said coolant return line, said coolant catch pan receiving said coolant exiting said coolant orifice and directing it into said coolant return line;

a coolant filter in said catch pan, to remove impurities from said coolant exiting said orifice prior to directing said coolant into said coolant return line;

a variable frequency drive electrically connected to said pump motor, said variable frequency drive providing AC power to said pump motor at various frequencies thereby controling the speed of said pump motor; and

a computer programmed with data of said total flow area of said coolant orifice, said computer monitors the coolant pressure by said pressure transducer;

wherein said computer determines a desired speed of said pump motor based on the coolant pressure and the total flow area of said coolant orifice and said computer controls said variable frequency drive to provide said pump motor with AC power at a frequency that results in said pump motor running at said desired speed.