Combination punch press and laser machine

• US 6,144,009 A
• Filed: 02/08/1999
• Issued: 11/07/2000
• Est. Priority Date: 02/08/1999
• Status: Expired due to Fees

• Current Assignee: Lillbacka Jetair OY
• Original Assignee: Lillbacka Jetair OY
• Inventors: Ulrich, Johannes
• Primary Examiner(s): MILLS, GREGORY L
• Application Number:
  US09/246,128
• Time in Patent Office: 638 Days
• Field of Search: 219/121.6, 219/121.67, 219/121.72, 219/121.85
• US Class Current: 219/121.67
• CPC Class Codes: B23K 26/0093 combined with mechanical machining or metal-working covered by other subclasses than B23K combined welding or cutting procedures or apparatus B23K28/02
• CPC Class Codes: B23K 26/08 Devices involving relative movement between laser beam and workpiece

Abstract

A combination punch press and laser machine has its punch press system and worktable mounted to one frame while its laser system mounted to another frame. The two frames are not in contact with each other, but are positioned such that a cantilever member of the frame whereon the laser system is mounted extends over the worktable so that the laser cutting head which is mounted to the end of the cantilever member superposes over a particular location of the worktable whereat the cutting of the worksheet by the laser beam is to be effected. This particular laser cutting location is positioned relative to the location of the worktable whereat the punching of the worksheet is to be effected by the pair of coacting upper tool and lower die of the punch press system. To prevent vibrations, be it resulting from impacts of the tool and die to the worksheet at the punching station or environmental vibrations, from affecting the accuracy of the positioning of the laser cutting head and damaging the laser cutting system, the frame on which the laser system is mounted is isolated from the floor by a number of rubber air springs which pressure is adjustably controlled by regulators. A number of safety supports that work in conjunction with the air springs prevent any collapse of the laser system frame in the unlikely event that the appropriate pressure is not maintained in the air pressure springs.

Claims

1. A combination punch press and laser machine, comprising:

at least one pair of coacting punch and die mounted to one frame;

a worktable;

clamping means for holding and moving a worksheet on said worktable;

an other frame positioned adjacent said one frame and having a cantilever member extending over said worktable;

a laser cutting system mounted to said other frame;

a laser cutting head of said laser cutting system mounted to said cantilever member so as to be in alignment with and superposed over a particular location on said worktable; and

cushioning means with the amount of cushion provided thereby being regulated for supporting said other frame, preventing uneven loading conditions of said other frame, and isolating said other frame from said one frame to thereby ensure that said laser cutting head remains in alignment with said particular location irrespective of the amount of impact and critical vibrations occurring at said one frame resulting from at least the fabrication of said worksheet by said pair of punch and die at said one frame.

2. Machine of claim 1, wherein said cushioning means comprises:

a plurality of regulated air springs adjustable for effecting maximal isolation for said other frame; and

wherein said other frame is a rigid unitary frame for enhancing isolation of said other frame from vibrations emanating from said one frame and environmental vibrations.

3. Machine of claim 2, wherein there are at least two air springs for supporting said platform and at least two other air springs for supporting a base of said other frame, wherein said cushioning means further comprises:

one regulator coupled to each of said air springs supporting said base of said other frame for regulating the amount of air input to said each air spring to thereby regulate the pressure of said each air spring for cushioning and isolating said other frame from vibrations of said one frame and environmental vibrations;

wherein, by controllably adjusting said regulators, said other frame is cushioned from a floor where it is positioned to therefore insulate it from vibrations and impacts that otherwise would have been transmitted thereto from the floor.

4. Machine of claim 3, further comprising:

a processor controller for monitoring the operation of said regulators and controllably adjusting said regulators to control the amount of pressure to be applied to said regulators to thereby maintain a maximal cushioning effect and vibration isolation for said other frame.

5. Machine of claim 2, further comprising:

a plurality of safety supports each working cooperatively with a corresponding one of said air springs to support said other frame and to prevent said other frame from flattening said one air spring in the event the air pressure in said one air spring is insufficient to support said other frame.

6. Machine of claim 2, wherein said cushioning means further comprises:

a level controller system for regulating the respective air pressures in said air springs in response to any uneven loads to said other frame to thereby maintain said other frame in a balanced condition.

7. Machine of claim 1, wherein said one frame is an O-shaped frame;

and

wherein said other frame comprises a platform, an upright member extending from said platform, and said cantilever member extending from a top portion of said upright member, said cantilever member being aligned next to said O-shaped frame and said platform being positioned away from said O-shaped frame.

8. Machine of claim 1, wherein said laser cutting system comprises:

a laser beam generator mounted to said other frame;

an optical beam pathway for guiding the laser beam output from said laser beam generator to said laser cutting head; and

wherein said punch and die are respective tools of an upper turret and a lower turret of a turret punch press.

9. Machine of claim 1, further comprising:

processor controller for controlling the movement of said clamping means to position said worksheet on said worktable with reference to a given location and said particular location for fabrication by said pair of punch and die and said laser cutting head, respectively.

10. A method of isolating a laser cutting system from a punching system in a combination laser and punch press machine, comprising the steps of:

a) mounting at least one pair of coacting punch and die to one frame;

b) movably coupling clamping means to a worktable, said clamping means holding and moving a worksheet on said worktable;

c) positioning an other frame adjacent said one frame, said other frame having a cantilever member extending over said worktable;

d) mounting a laser cutting system to said other frame;

e) mounting a laser cutting head of said laser cutting system to said cantilever member to be in alignment with and superposed over a particular location on said worktable; and

f) providing cushioning means with the amount of cushion provided thereby being regulated to the underside of said other frame for supporting said other frame and preventing uneven loading of said other frame so as to ensure that said laser cutting head remains in alignment with said particular location irrespective of the amount of impact and vibrations occurring at said one frame.

11. Method of claim 10, wherein said other frame is a rigid unitary frame, and wherein said step f further comprises the steps of:

providing a plurality of air springs to said other frame; and

regulating the pressure in said air springs to obtain maximal cushioning for said other frame for enhancing isolation of said other frame from environmental vibrations and vibrations emanating from said one frame.

12. Method of claim 11, further comprising the step of:

utilizing a processor controller to automatically monitor the operation of said air springs and regulate the pressure in said air springs.

13. Method of claim 11, further comprising the step of:

providing a plurality of safety supports each working cooperatively with a corresponding one of said air springs to support said other frame and to prevent said other frame from flattening said one air spring in the event the air pressure in said one air spring is insufficient to support said other frame.

14. Method of claim 10, wherein said one frame is an O-shaped frame and said other frame comprises a platform, an upright member extending from said platform, and said cantilever member extending from the top portion of said upright member, wherein said step d further comprises the steps of:

aligning said cantilever member next to said O-shaped frame; and

positioning said platform away from said O-shaped frame.

15. Method of claim 10, wherein said step e further comprises the steps of:

mounting a laser beam generator to said other frame; and

guiding the laser beam output from said laser beam generator to said laser cutting head via an optical beam pathway positioned relative to said other frame.

16. Method of claim 10, wherein said step f further comprises the steps of:

providing a plurality of air springs for supporting a base of said other frame;

coupling one regulator to each of said air springs supporting said base for regulating the amount of air input to said each air spring to thereby regulate the pressure of said each air spring for cushioning and isolating said other frame from vibrations of said one frame and environmental vibrations; and

controllably adjusting said regulators for cushioning said other frame from a floor where said other frame is positioned to therefore insulate said other frame from vibrations and impacts that otherwise would have been transmitted thereto from the floor.

17. Method of claim 16, further comprising the step of:

using a processor controller to automatically control the operations of said regulators.

18. Method of claim 16, further comprising the step of:

regulating the respective air pressures in said sir springs in response to any uneven loads to said other frame to thereby maintain said other frame in a balanced condition.