Measurement device and measurement method for measuring the thickness of a panel-shaped object

Patent metadata

Field	Value
Publication number	US-9528811-B2
Application number	US-201314439739-A
Country	US
Kind code	B2
Filing date	Nov 6, 2013
Priority date	Nov 8, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A measurement device ( 100 . . . 103 ) for measuring the thickness (d) of a plate-shaped object ( 7 ) is indicated, which comprises a first measurement sensor ( 21 . . . 23 ) for being set onto a first surface ( 9 ) of the plate-shaped object ( 7 ) and a second to fourth measurement sensor ( 31 . . . 53 ) for being set onto a second surface ( 10 ), opposite to the first surface ( 9 ) of the plate-shaped object ( 7 ). Furthermore, the measurement device ( 100 . . . 103 ) comprises means for calculating the thickness (d) of the plate-shaped object ( 7 ), using the positions ( 81 . . . 84 ) at which the measurement sensors ( 21 . . . 53 ) touch the plate-shaped object ( 7 ). Furthermore, a measurement method for measuring the thickness (d) of a plate-shaped object ( 7 ) is also indicated.

First claim

The invention claimed is:

1. A bending machine ( 11 ) for bending a plate-shaped object ( 7 ), having a measurement device ( 100 . . . 103 ) disposed in a feed region for the plate-shaped object to be bent, for measuring a thickness (d) of a plate-shaped object ( 7 ), comprising:
a first measurement sensor ( 21 . . . 23 ), which is set up for measuring a first position ( 81 ) of a contact point of the first measurement sensor ( 21 . . . 23 ) with a first surface ( 9 ) of the plate-shaped object ( 7 ),
a second measurement sensor ( 31 . . . 33 ), which is set up for measuring a second position ( 82 ) of a contact point of the second measurement sensor ( 31 . . . 33 ) with a second surface ( 10 ) of the plate-shaped object ( 7 ), which lies opposite to the first surface ( 9 ),
a third measurement sensor ( 41 . . . 43 ), which is set up for measuring a third position ( 83 ) of a contact point of the third measurement sensor ( 41 . . . 43 ) with the second surface ( 10 ) of the plate-shaped object ( 7 ),
a fourth measurement sensor ( 51 . . . 53 ), which is set up for measuring a fourth position ( 84 ) of a contact point of the fourth measurement sensor ( 51 . . . 53 ) with the second surface ( 10 ) of the plate-shaped object ( 7 ), wherein the positions ( 82 . . . 84 ) of the contact points of the second, third, and fourth measurement sensor ( 31 . . . 53 ) are spaced apart from one another and disposed in a triangle, and
a computer unit, which is set up for calculating the thickness (d) of the plate-shaped object ( 7 ), which corresponds to the normal distance of the first surface ( 9 ) from the second surface ( 10 ), on the basis of the first to fourth position ( 81 . . . 84 ), which are measured essentially at the same time.

2. The bending machine according to claim 1 , comprising a fork-shaped holder ( 6 ), wherein the first measurement sensor ( 21 . . . 23 ) is disposed on a first fork extension, and the second to fourth measurement sensor ( 31 . . . 53 ) are disposed on a second fork extension.

3. The bending machine according to claim 1 , wherein the measurement sensors ( 21 . . . 51 , 22 . . . 52 ) each have a linearly displaceable measurement plunger, the displacement directions of which are oriented parallel to one another.

4. The bending machine according to claim 3 , wherein the axes of the measurement plungers of the first and the second measurement sensor ( 21 , 22 , 51 , 52 ) lie on a straight line.

5. The bending machine according to claim 1 , wherein the computer unit is set up for
calculating the distance between the first position ( 81 ) and the second position ( 82 ),
calculating the angular position of the second surface ( 10 ) relative to a straight line that runs between the first position ( 81 ) and the second position ( 82 ), on the basis of the measured second to fourth position ( 82 . . . 84 ), and
calculating the normal distance of the first surface ( 9 ) from the second surface ( 10 ) on the basis of the distance between the first position ( 81 ) and the second position ( 82 ), as well as the said angular position.

6. A method for bending a plate-shaped object ( 7 ), in which a thickness (d) of the plate-shaped object ( 7 ) is measured, wherein a first position ( 81 ) of a contact point of a first measurement sensor ( 21 . . . 23 ) with a first surface ( 9 ) of the plate-shaped object ( 7 ) is measured,
comprising the steps
measuring a second position ( 82 ) of a contact point of a second measurement sensor ( 31 . . . 33 ) with a second surface ( 10 ) of the plate-shaped object ( 7 ), which lies opposite the first surface ( 9 ),
measuring a third position ( 83 ) of a contact point of a third measurement sensor ( 41 . . . 43 ) with the second surface ( 10 ) of the plate-shaped object ( 7 ),
measuring a fourth position ( 84 ) of a contact point of a fourth measurement sensor ( 51 . . . 53 ) with the second surface ( 10 ) of the plate-shaped object ( 7 ), wherein the positions ( 82 . . . 84 ) of the contact points of the second, third, and fourth measurement sensor ( 31 . . . 53 ) are spaced apart from one another and disposed in a triangle, and
calculating the thickness (d) of the plate-shaped object ( 7 ), which corresponds to the normal distance of the first surface ( 9 ) from the second surface ( 10 ), on the basis of the measured first to fourth position ( 81 . . . 84 ), which are essentially measured at the same time.

7. Method according to claim 6 , wherein
the distance between the first position ( 81 ) and the second position ( 82 ) is calculated,
the angular position of the second surface ( 10 ) relative to a straight line that runs between the first position ( 81 ) and the second position ( 82 ) is calculated on the basis of the measured second to fourth position ( 82 . . . 84 ), and
the normal distance of the first surface ( 9 ) from the second surface ( 10 ) is calculated on the basis of the distance between the first position ( 81 ) and the second position ( 82 ), as well as the said angular position.

8. Method according to claim 6 , wherein the first to fourth position ( 81 . . . 84 ) is essentially measured at the same time.

Assignees

• Trumpf Maschinen Austria Gmbh & Co Kg

Inventors

• Auzinger Michael
• Denkmeier Thomas
• Haselboeck Alfred

Classifications

• G01B5/06 Primary

  for measuring thickness · CPC title

• G01B2210/44

  with detectors on both sides of the object to be measured · CPC title

• G01B7/06

  for measuring thickness {(measuring during the manufacture of coatings C23C14/54)} · CPC title

• B21D5/004

  with program control · CPC title

• B21D5/02

  on press brakes without making use of clamping means · CPC title