Claims
- 1. A method of dynamically supporting a drill quill containing a drill spindle journaled therein, and an electromagnetically driven impact driver concentrically disposed around said drill quill for independent axial movement toward and away from a workpiece clamped in place by a pressure foot mounted on a base member, for drilling with a drill mounted on said drill quill and force impact with said impact driver in a coaxial drilling and electromagnetic impact apparatus, comprising:
- laterally supporting said drill quill for sliding axial motion in a sleeve bearing adjacent its lower end;
- rigidly supporting said sleeve bearing in a quill support member fixedly mounted on said base member;
- supporting said drill quill at its top end on a quill mounting member;
- supporting said quill mounting member for axial movement toward and away from said pressure foot; and
- axially guiding said impact driver in angularly spaced openings in said quill support member disposed radially outside of said sleeve bearing.
- 2. The method defined in claim 1, further comprising:
- axially guiding and laterally supporting said driver at its lower end for axial motion in an axial opening in said base member.
- 3. The method defined in claim 1, wherein:
- said axially guiding step for said impact driver in said angularly spaced openings in said quill support member includes engaging a radially facing outside surface on said journal bearing with a radially facing inside surface on said impact driver.
- 4. The method defined in claim 1, wherein:
- said base member is a base plate having at least three rods mounted thereon;
- said quill mounting member is a middle plate, and said support of said quill mounting member includes supporting said middle plate on said rods for axial movement therealong toward and away from said base plate.
- 5. The method defined in claim 4, further comprising:
- mounting said rods, at the ends thereof remote from said base plate, on a top plate; and
- mounting said top plate on a main support member for support of said apparatus.
- 6. The method defined in claim 5, further comprising:
- axially moving said base plate on said rods to move said pressure foot against said workpiece, whereby said workpiece is clamped for drilling and force impacting.
- 7. The method defined in claim 1, further comprising:
- driving said driver with an electromagnetic actuator having two components, including a flat coil and a transducer made of electrically conductive material;
- supporting one of said components on an EMR support plate, and connecting the other of said components to said driver; and
- guiding said one component for axial motion on said drill quill.
- 8. The method defined in claim 7, further comprising:
- holding said driver and said electromagnetic actuator in a retracted position with a pop-back air cylinder;
- said retracted position being determined by engagement of a shoulder on said driver against a shoulder fixed relative to said base member.
- 9. The method defined in claim 7, further comprising:
- absorbing recoil energy of said one component in a recoil air cylinder when said electromagnetic actuator is operated, and returning said components to their starting position on a return stroke of said recoil air cylinder; and
- damping said return stroke of said recoil air cylinder.
- 10. The method defined in claim 7, further comprising:
- moving said driver into engagement with a rivet die, which in turn is engaged with a rivet, before said electromagnetic actuator is operated to upset the rivet, by deenergizing a pop-back air cylinder and allowing a recoil air cylinder to move said EMR support plate to a lower position wherein said driver is in engagement with said rivet die.
- 11. The method defined in claim 1, wherein:
- said sleeve bearing has a low friction coating of Teflon impregnated aluminum oxide on the inside circumferential surface thereof.
- 12. A method of dynamically supporting a drill quill and an electromagnetically driven concentric impact driver for axial movement toward and away from a workpiece clamped in place by a pressure foot mounted on a base member, for drilling with a drill mounted on said drill quill and force impact with said impact driver in a coaxial drilling and electromagnetic impact apparatus, comprising:
- laterally supporting said drill quill for sliding axial motion in a sleeve bearing adjacent its lower end;
- rigidly supporting said sleeve bearing in a quill support member fixedly mounted on said base member;
- supporting said drill quill at its top end on a quill mounting member;
- supporting said quill mounting member for axial movement toward and away from said pressure foot;
- axially guiding said impact driver in angularly spaced openings in said quill support member disposed radially outside of said sleeve bearing;
- driving said impact driver with an electromagnetic actuator having two components, including a flat coil and a transducer made of electrically conductive material;
- supporting one of said components on an EMR support plate, and connecting the other of said components to said impact driver;
- guiding said one component for axial motion on said drill quill;
- absorbing recoil energy of said one component in a recoil air cylinder when said electromagnetic actuator is operated, and returning said components to their starting position on a return stroke of said recoil air cylinder; and
- damping said return stroke of said air cylinder.
- 13. A method of dynamically supporting a drill quill and an electromagnetically driven concentric impact driver for axial movement toward and away from a workpiece clamped in place by a pressure foot mounted on a base member, for drilling with a drill mounted on said drill quill and force impact with said impact driver in a coaxial drilling and electromagnetic impact apparatus, comprising:
- laterally supporting said drill quill for sliding axial motion in a sleeve bearing adjacent its lower end;
- rigidly supporting said sleeve bearing in a quill support member fixedly mounted on said base member;
- supporting said drill quill at its top end on a quill mounting member;
- supporting said quill mounting member for axial movement toward and away from said pressure foot;
- axially guiding said impact driver in angularly spaced openings in said quill support member disposed radially outside of said sleeve bearing;
- driving said impact driver with an electromagnetic actuator having two components, including a flat coil and a transducer made of electrically conductive material;
- supporting one of said components on an EMR support plate, and connecting the other of said components to said impact driver;
- guiding said one component for axial motion on said drill quill; and
- moving said driver into engagement with a rivet die, which in turn is engaged with a rivet, before said electromagnetic actuator is operated to upset the rivet, by deenergizing a pop-back air cylinder and allowing a recoil air cylinder to move said EMR support plate to a lower position wherein said driver is in engagement with said rivet die.
BACKGROUND OF THE INVENTION
This is a division of U.S. application Ser. No. 07/632,445 filed on Dec. 21, 1990 and entitled "Drill/Rivet Machine", now U.S. Pat. No. 5,231,747.
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Divisions (1)
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Number |
Date |
Country |
Parent |
632445 |
Dec 1990 |
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