Workpiece processing machine and method for operating the workpiece processing machine
The invention relates to a workpiece processing machine ( 1 ), and to a method for operation of a workpiece processing machine ( 1 ). The workpiece processing machine ( 1 ) comprises an automatically adjustable stop finger ( 17 ), and has, for monitoring adjustment movements of the stop finger ( 17 ), a monitoring device ( 36, 37, 38 ) that comprises an illuminating device ( 36 ) and at least one optical detection device ( 37 ). In operation of the workpiece processing machine ( 1 ), during an automatically controlled adjustment movement of the stop finger ( 17 ), a light beam ( 38 ) is radiated into an area ahead of the stop finger ( 17 ) in the adjustment direction. Upon detection of a first light image ( 43 ) projected onto an object surface ( 42 ) by the first light beam ( 38 ), a safety measure is triggered.
1. A method for operation of a workpiece processing machine ( 1 ), comprising
performing an automatically controlled adjustment movement of at least one stop finger ( 17 ) of a stop device ( 16 ) along at least one driven adjustment axis ( 22 ) into a stop position ( 19 ) provided for positioning of a workpiece ( 4 ),
placing the workpiece ( 4 ) against a contact surface ( 21 ) of the at least one stop finger ( 17 ) to position the workpiece,
during the automatically controlled adjustment movement of the at least one stop finger ( 17 ), using an illuminating device ( 36 ) motion-coupled to the stop finger ( 17 ) along the at least one driven adjustment axis ( 22 ) to radiate a first light beam ( 38 ) into an area ahead of the at least one stop finger ( 17 ) in an adjustment direction ( 39 , 45 ),
using at least one stationary optical detection device ( 37 ) to monitor a monitoring area ( 41 ) for adjustment movements of the at least one stop finger ( 17 ),
initiating an automatically controlled safety measure when a first light image ( 43 ) projected by the first light beam ( 38 ) onto an object surface ( 42 ) is detected.
2. The method according to claim 1 , wherein the illuminating device ( 36 ) is adjusted with the stop finger ( 17 ) in a motion-coupled manner at least along two adjustment axes ( 22 ).
3. The method according to claim 2 , wherein the first light beam ( 38 ) is directed into the area ahead of the stop finger ( 17 ) in the adjustment direction ( 39 , 45 ) by an optical mirror surface ( 40 ).
4. The method according to claim 1 , wherein the first light beam ( 38 ) is radiated into the area ahead of the stop finger ( 17 ) as an at least largely parallel light beam ( 38 ) whose beam path ( 48 ) forms a first, planar light surface ( 49 ).
5. The method according to claim 4 , wherein the first light beam ( 38 ) is radiated into the area ahead of the stop finger ( 17 ) in the adjustment direction ( 39 ) such that a light beam transverse axis ( 51 ) of the first light surface ( 49 ) extending transversely to the beam path ( 48 ) is at least largely parallel to a contact surface ( 21 ) of the stop finger ( 17 ).
6. The method according to claim 5 , wherein the first light beam ( 38 ) is radiated into the area ahead of the stop finger ( 17 ) in the adjustment direction ( 39 ) such that a transverse extent ( 53 ) of the first light surface ( 49 ) parallel to the light beam transverse axis ( 51 ) in the area of the stop finger ( 17 ) is bigger than a width ( 55 ) of the stop finger ( 17 ) extending between two side edges ( 54 ).
7. The method according to claim 4 , wherein the illuminating device ( 36 ) comprises a line laser ( 52 ).
8. The method according to claim 1 , wherein the first light beam ( 38 ) is radiated into the area ahead of the stop finger ( 17 ) in the adjustment direction ( 39 ) at least at a minimum distance ( 56 ) from a limiting edge ( 57 ) of the stop finger ( 17 ) that leads in the adjustment direction ( 39 ).
9. The method according to claim 1 , wherein the illuminating device ( 36 ) is not adjusted in the direction of a vertical adjustment axis ( 22 ) that is perpendicular to a base surface ( 5 ).
10. The method according to claim 1 , wherein a second light image ( 58 ) is projected by the illuminating device ( 36 ) that is motion-coupled to the stop finger ( 17 ) onto a surface ( 59 ) of the stop finger ( 17 ) that is detectable by means of the at least one optical detection device ( 37 ).
11. The method according to claim 10 , wherein the second light image ( 58 ) has a linear edge parallel to a contact surface ( 21 ) of the stop finger ( 17 ).
12. The method according to claim 11 , wherein a third light image ( 61 ) having a linear edge that is parallel to the linear edge of the second light image is projected onto the surface ( 59 ) of the stop finger ( 17 ) at a distance from the second strip of light ( 60 ) by the illuminating device ( 36 ) that is motion-coupled to the stop finger ( 17 ).
13. The method according to claim 12 , wherein a position of the stop finger ( 17 ) is determined computationally from the visually detected location of the second light image and/or the third light image ( 61 ) in the monitoring area ( 41 ).
14. The method according to claim 1 , wherein the monitoring area ( 41 ) is monitored by means of at least one stationary imaging camera ( 46 ).
15. The method according to claim 14 , wherein a distance between a limiting edge ( 57 ) of the stop finger ( 17 ) on a workpiece feed side and the camera ( 46 ) is determined computationally from a visually detected, apparent perpendicular distance ( 66 ) between the second strip of light ( 60 ) and the third strip of light ( 61 ).
16. The method according to claim 1 , wherein the first light beam ( 38 ) is immediately activated in the event of an automatically controlled start of an adjustment movement of the stop finger ( 17 ) into a stop position ( 19 ).
17. The method according to claim 1 , wherein the first light beam ( 38 ) is immediately deactivated upon reaching a selected stop position ( 19 ).
18. The method according to claim 1 , wherein, during an adjustment movement into a selected stop position ( 19 ), the first light beam ( 38 ) is deactivated during the adjustment movement, at a distance from the stop position ( 19 ) until the stop position ( 19 ) is reached.
19. The method according to claim 1 , wherein the first light beam ( 38 ) is deactivated when the stop finger ( 17 ) is at a standstill.
20. The method according to claim 1 , wherein an immediate retraction movement of the stop finger ( 17 ) is triggered as an automatically controlled safety measure.
21. The method according claim 1 , wherein no automatically controlled safety measure is triggered when the stop finger ( 17 ) is at a standstill.
22. The method according to claim 1 , wherein the first light beam ( 38 ) is radiated into the area ahead of the stop finger ( 17 ) during an adjustment movement of the stop finger ( 17 ) into a stop position ( 19 ) performed along a horizontal adjustment axis ( 22 ) in the direction of a workpiece feed side ( 20 ).
23. A workpiece processing machine ( 1 ), comprising:
an automatically controlled stop device ( 16 ), comprising at least one automatically controlled stop finger ( 17 ) that is displaceable along at least one driven adjustment axis ( 22 ) and has at least one contact surface ( 21 ) intended for placement of a tool to be formed in a stop position ( 19 ),
a control device ( 23 ) for automatic control of adjustment movements of the stop finger ( 17 ) along the at least one adjustment axis ( 22 ),
a monitoring device ( 35 ) connected by signaling means to the control device ( 23 ) and comprising an illuminating device ( 36 ) and at least one optical detection device ( 37 ),
wherein the illuminating device ( 36 ) is arranged to be motion-coupled to the stop finger ( 17 ), and is configured to radiate a first light beam ( 38 ) into an area ahead of the stop finger ( 17 ) in the adjustment direction ( 39 , 45 ) during an automatically controlled adjustment movement of the at least one stop finger ( 17 ) in operation of the workpiece processing machine ( 1 ), and
wherein the at least one detection device ( 37 ) is arranged to be stationary for monitoring of a monitoring area ( 41 ), and is configured to detect a first light image ( 43 ) created when the first light beam ( 38 ) is incident on an object surface ( 42 ), and
wherein the control device ( 23 ) is configured to trigger at least one safety measure in the event the first light beam ( 38 ) is activated and detection of the first light image ( 43 ) by the at least one optical detection device ( 37 ) takes place during the adjustment movement of the stop finger ( 17 ).
24. The workpiece processing machine according to claim 23 , wherein the illuminating device ( 36 ) is arranged to be adjustable in a motion-coupled manner with the stop finger ( 17 ) at least along two driven adjustment axes ( 22 ).
25. The workpiece processing machine according to claim 23 , wherein an optical mirror surface ( 40 ) is arranged for orientation of the first light beam ( 38 ) into the area ahead of the stop finger ( 17 ).
26. The workpiece processing machine according to claim 25 , wherein the mirror surface ( 40 ) extends over the entire length of a bench beam ( 6 ) implemented on the workpiece processing machine ( 1 ).
27. The workpiece processing machine according to claim 23 , wherein the illuminating device ( 36 ) comprises a line laser ( 52 ) that is configured to emit, into the area ahead of the stop finger ( 17 ), an at least largely parallel first light beam ( 38 ) whose beam path ( 48 ) is located in a first, planar light surface ( 49 ).
28. The workpiece processing machine according to claim 27 , wherein the line laser ( 52 ) is arranged such that a light beam transverse axis ( 51 ) of the first light surface ( 49 ) that is perpendicular to the beam path ( 48 ) is at least largely parallel to a contact surface ( 21 ) of the stop finger ( 17 ) in operation of the workpiece processing machine ( 1 ).
29. The workpiece processing machine according to claim 27 , wherein the line laser ( 52 ) is arranged such that a transverse extent ( 53 ) of the first light surface ( 49 ) parallel to the light beam transverse axis ( 51 ) in the area of the stop finger ( 17 ) is bigger than a width ( 55 ) of the stop finger ( 17 ) extending between two side edges ( 54 ) in operation of the workpiece processing machine ( 1 ).
30. The workpiece processing machine according to claim 27 , wherein the line laser ( 52 ) is configured to project onto the surface ( 59 ) of the stop finger ( 17 ) of a second strip of light ( 60 ) parallel to a contact surface ( 21 ) of the stop finger ( 17 ).
31. The workpiece processing machine according to claim 30 , wherein the line laser ( 52 ) is configured to project onto the surface ( 59 ) of the stop finger ( 17 ) a third strip of light ( 61 ) that is parallel to the second strip of light ( 60 ) at a distance from the second strip of light ( 60 ).
32. The workpiece processing machine according to claim 23 , wherein the at least one optical detection device ( 37 ) comprises a stationary imaging camera ( 46 ).
33. The workpiece processing machine according to claim 23 , wherein the illuminating device ( 36 ) is not motion-coupled to the stop finger ( 17 ) along a vertical adjustment axis ( 22 ) that is perpendicular to a base surface ( 5 ).
34. The workpiece processing machine according to claim 23 , wherein at least one horizontal, driven adjustment axis ( 22 ) is provided for automatically controlled adjustment of the at least one stop finger ( 17 ) in the direction of a workpiece feed side ( 20 ) into the stop position ( 19 ).