DEVICE FOR ALIGNING AN ANGLE MEASURING INSTRUMENT

Abstract

A device is described for aligning an angle measuring device (1) in relation to two workpiece planes (2, 3) enclosing an angle to be measured, wherein the angle measuring device (1) has a rotating mirror (8) for deflecting a laser beam (10) perpendicular to the axis of rotation (7) of the mirror (8). To provide advantageous alignment conditions, it is proposed that an orientation stop (13), which defines a stop straight line (14), which is parallel to the axis of rotation (7) of the mirror (8), for both workpiece planes (2, 3), is assigned to the angle measuring device (1).

Claims

1. A device for aligning an angle measuring device (1) in relation to two workpiece planes (2, 3) enclosing an angle to be measured, wherein the angle measuring device (1) has a rotating mirror (8) for deflecting a laser beam (10) perpendicular to the axis of rotation (7) of the mirror (8), characterized in that an orientation stop (13) is assigned to the angle measuring device (1), which orientation stop (13) defines a stop straight line (14) parallel to the axis of rotation (7) of the mirror (8) for both workpiece planes (2, 3).

2. The device according to claim 1, characterized in that the orientation stop (13) forms an orientation ruler which can be supported on the inner side of an intersection edge (17) between the workpiece planes (2, 3).

3. The device according to claim 1, characterized in that the orientation stop (13) forms a stop cylinder (21) which is parallel to the axis of rotation (7) of the mirror (8).

4. The device according to any one of claims 1 to 3, characterized in that the orientation stop (13) has two stop sections (15) on both sides of the plane of the deflected laser beam (10) defined by the rotating mirror (8).

5. The device according to any one of claims 1 to 4, characterized in that the orientation stop (13) forms a module separate from the angle measuring device (1), having a receptacle (18) for the angle measuring device (1).

6. The device according to any one of claims 1 to 3, characterized in that the orientation stop (13) is mounted on the housing (5) of the angle measuring device (1) in such a way, that the orientation stop (13) is displaceable between an idle position and a working position.

7. The device according to claim 6, characterized in that in its idle position the orientation stop (13) forms a closure for covering the laser outlet opening (19) in the housing (5) of the angle measuring device (1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The subject matter of the invention is illustrated by way of example in the drawings. In the figures

[0012] FIG. 1 shows a device according to the invention in a partially cutaway front view,

[0013] FIG. 2 shows this device in an end-face view,

[0014] FIG. 3 shows the device according to FIGS. 1 and 2 in a rear view in a smaller scale,

[0015] FIG. 4 shows an embodiment variant of a device according to the invention in a schematic front view,

[0016] FIG. 5 shows the device according to FIG. 4 in an end-face view in a larger scale,

[0017] FIG. 6 shows an illustration of a further design variant of the device according to the invention corresponding to FIG. 4, and

[0018] FIG. 7 shows an end-face view of the device according to FIG. 6.

WAYS OF EMBODYING THE INVENTION

[0019] As can be inferred from FIGS. 1 and 2, the angle measuring device 1 for determining the angle between two planar workpiece faces 2, 3, for example, of a plate 4 bent with the aid of a stamp and a die, has a housing 5, in which all means required for the measurement and the measurement display are combined. In a solely schematic illustration, these means comprise a mirror 8 drivable by a motor 6 about an axis of rotation 7 and a laser emitter 9 for a laser beam 10, which is incident on the mirror 8 in the direction of the axis of rotation 7 in order to be deflected perpendicularly to the axis of rotation 7. The deflected laser beam 10 passes over the two workpiece faces 2, 3 in the case of an alignment of the axis of rotation 7 of the mirror 8 parallel to the vertex axis of the angle to be measured along straight lines perpendicular to the vertex axis and intersecting in the vertex axis, which enclose the angle between them. The laser beam 10 incident on the workpiece faces 2, 3 is reflected on the respective workpiece face 2, 3, wherein exclusively the laser beam 10 reflected in the direction of incidence, i.e., the laser beam 10 reflected perpendicular to the workpiece plane 2, 3, is analyzed for the angle determination via a receiving unit 11, by associating the rotational position of the mirror 8 with this reflected laser beam 10. The measurement result is displayed in a display 12.

[0020] One condition for an error-free measurement procedure is that the housing 6 of the angle measuring device 1 can be aligned having the axis of rotation 7 for the mirror 8 precisely parallel to the vertex axis of the angle between the two workpiece planes 2, 3, which is difficult in the case of a measuring device designed as a handheld device without corresponding aids. An orientation stop 13 is therefore associated with the angle measuring device 1, which defines at least one stop straight line 14, which is parallel to the axis of rotation 7 of the mirror 8, for the two workpiece planes. According to the exemplary embodiment of FIGS. 1 to 3, the orientation stop 13 forms for this purpose an orientation ruler from two stop sections 15 on both sides of the plane of the deflected laser beam 10 defined by the rotating mirror 8, wherein the contact edges 16 of these stop sections 15 define the stop straight line 14. If the orientation ruler formed from the two stop sections 15 is accordingly placed between the two workpiece planes 2, 3 with the contact edges 16 on the intersection edge 17 between the two workpiece planes 2, 3, the angle measuring device 1 can thus be held aligned correctly for measurement in relation to the workpiece planes 2, 3 in a simple manner.

[0021] The orientation stop 13 according to FIGS. 1 to 3 is formed as a module separate from the angle measuring device 1, which has an angle receptacle 18 for the formfitting fastening of the housing 5. The mounting of the housing 5 in the receptacle 18 can preferably be performed with the aid of permanent magnets, but this is not required. The two stop sections 15 of the orientation ruler protrude correspondingly from the angled receptacle 18, so that the laser outlet opening 19 of the housing 5 is located at a corresponding distance from the intersection edge 17 between the two workpiece planes 2, 3, in order to achieve good measuring conditions. In order that the laser beam 10 can also be emitted perpendicularly onto both workpiece planes 2, 3 in the case of shorter angle legs, the distance of the axis of rotation 7 of the mirror 8 from the vertex axis of the angle to be measured can be restricted by the orientation stop 13. For this purpose, the distance of the axis of rotation 7 of the mirror 8 from the stop straight lines can be 10 to 80 mm, preferably 10 to 40 mm.

[0022] As the exemplary embodiment according to FIGS. 4 and 5 shows, it is also possible to provide the angle measuring device 1 itself with the orientation stop 13. For this purpose, two stop sections 15 are in turn mounted on the housing 5 so they are pivotable around axes 20. This means that the stop sections 15 can be pivoted out from an idle position indicated by a dot-dash line into the operating position shown by solid lines.

[0023] In contrast to the exemplary embodiment according to FIGS. 1 to 3, the two stop sections 15 define a stop cylinder 21, because they have a semicircular shape in a plane perpendicular to the vertex axis of the angle . As can be inferred from FIG. 5, two stop straight lines 14 each formed by one generator of the stop cylinder 21 result due to this stop cylinder 21, via which the orientation stop 13 is supported on the two workpiece planes 2 and 3. An accurate measurement alignment of the angle measuring device 1 in relation to the workpiece planes 2, 3 is also ensured in this case upon placement of the orientation stop 13 on the two workpiece planes 2, 3.

[0024] An orientation stop 13 corresponding in its action to the embodiment according to FIGS. 1 to 3 results according to FIGS. 6 and 7, which forms a continuous orientation ruler, the contact edge 16 of which interacts with the intersection edge 17 between the workpiece planes 2 and 3, as can be inferred from FIG. 7 in particular. The orientation stop 13 is mounted so it is pivotable on the housing 5 around axes 22, which extend parallel to the stop straight lines 14 formed by the orientation ruler.