JPWO2020127797A5

JPWO2020127797A5 -

Info

Publication number: JPWO2020127797A5
Application number: JP2021535253A
Authority: JP
Publication date: 2022-08-01
Anticipated expiration: 2039-12-19

Description

シートプランニング幾何学データを準備するための方法の幾つかの発展形態では、画像記録をエッジ進路に関して評価し、残材シート外側輪郭を特定する外周エッジと、内側切抜き輪郭を画定する内周エッジまたは内周エッジ区分とを画像記録において識別し、シートプランニング幾何学データに外周エッジラインおよび内周エッジラインとして格納する。内周エッジラインは、残材シートの内側切抜き領域を画定する。
In some developments of the method for preparing sheet planning geometric data, the image records are evaluated with respect to edge course to determine the outer perimeter edge defining the remnant sheet outer contour and the inner perimeter edge defining the inner cutout contour or Inner edge segments are identified in the image record and stored in the sheet planning geometry data as outer edge lines and inner edge lines. The inner perimeter edge line defines the inner cutout area of the remnant sheet.

Claims

A method for cutting a workpiece from a sheet of material by means of a laser beam of a laser flatbed machine (1) within the framework of a cutting process, comprising:
The remaining material sheet (23) is captured by the camera (9) of the laser flatbed machine (1) in the provided area on the pallet (7) assigned to the sheet cutting unit (3) of the laser flatbed machine (1). ) (step 53);
making, by means of a camera (9), an image record (21) of a remnant sheet (23) of said pallet (7) positioned in a serving area (step 55), said remnant sheet (23) being , having an inner cut-out area (25) that has been machined by said laser flat bed machine (1) and from which cuttings have been removed (step 55);
evaluating (step 57A) said image recording (21) to identify a remnant sheet outer contour (23A) of said remnant sheet (23);
evaluating (step 57B) the image recording (21) to identify an inner cut-out area of the remnant sheet (23) located inward of the remnant sheet outer contour (23A); identifying the inner clipping area (step 57B) by identifying the inner clipping contour (23B) identified in the image record and/or by threshold analysis of the image record;
deriving a remnant surface (24) of the remnant sheet (23) using the remnant sheet outer contour (23A) and the inner cutout area (step 59), wherein the remnant surface (24) can form the basis of the laser cutting process (step 59);
outputting sheet planning geometry data (31) defining the geometry of said remnant surface (24) (step 61);
placing (step 63) a cutting contour (39) on the remnant surface (34) identified by said sheet planning geometry data (31);
creating said cutting plan (63A) from position data of said cutting contour (39) and from said sheet planning geometric data and/or data of translational and/or rotational transformations (25);
reading (step 65) said cutting plan (63A) into the control unit (11) of said laser flat bed machine (1);
running the pallet with the remnant sheet (23) into the sheet cutting unit (3) of the laser flatbed machine (1) (step 67);
performing a cutting process on the remnant sheet (23) according to the loaded cutting plan (63A) (step 69);
(54).

Said image record (21) is evaluated with respect to edge course to determine said outer perimeter edge defining said remnant sheet outer contour (23A) and said inner perimeter edge or inner perimeter edge section defining said inner cutout contour (23B). identified in the image record (21) and stored in said sheet planning geometry data (31) as an outer peripheral edge line (33A) and an inner peripheral edge line (33B), said inner peripheral edge line (33B) being said residual A method (54) according to claim 1, comprising defining an inner cutout area (35) of the sheet of material (23).

Said threshold analysis analyzes pixel values of said image record (21) for openings (23C) inside said remnant sheet outer contour (23A), optionally comprising blob analysis, said blob analysis comprising at least an inner cutout area that outputs one associated pixel area, the gray value distribution of which in said sheet planning geometric data (31) is excluded from the cutting process to be planned of said remnant sheet (23). The method (54) of claim 1 or 2, assigned to (35).

calculating the translational and/or rotational transformation (25) of said remnant sheet outer contour (23A) to the machine zero point;
outputting said translational and rotational transformations (25) as part of said sheet planning geometry data (31);
The method (54) of any one of claims 1 to 3, further comprising:

Said image record (21) comprises a plurality of remnant sheets (23) for which respectively one remnant surface (24) is derived to provide sheet planning geometric data. The method (54) of any one of claims 1 to 4, outputting as (31).

applying said cutting contour (39) to said remnant surface (34) identified by said sheet planning geometric data (31);
- manually by the operator on an image basis, or - using a nesting method for arranging the two-dimensional space assigned to the workpiece geometry to be cut,
6. A method according to any one of claims 1 to 5 , wherein the method comprises:

A method for cutting a workpiece from a sheet of material by means of a laser beam within the frame of a cutting process, comprising:
A step of delivering a pallet (7) from a sheet cutting unit (3) of a laser flat bed machine (1) (step 51A), wherein said pallet (7) is provided with a cut product and a scrap sheet surrounding said cut product. (23) in which the processed sheet is located (step 51A);
sorting the cut pieces (step 51B), thereby leaving the remnant sheet (23), which is transferred to the pallet for making an image record (21); (7), a sorting step (step 51B) of preparing and sorting the residual material sheet (23) within the photographing area of the camera (9);
performing a method for creating a cutting plan (63A) according to any one of claims 1 to 6 ;
A method , including

During at least one of the steps of sorting the cuts, performing the method for creating a cutting plan (63A) and reading the cutting plan (63A), a further sheet is fed to the laser. 8. A method according to any one of the preceding claims, wherein the sheet cutting unit (3) of the flat-bed machine (1) is run into and cut into workpieces in a cutting process.

A laser flatbed machine (1) for cutting workpieces from sheet material by means of a laser beam, comprising:
at least one pallet changer (5A, 5B) for preparing a serving area of pallets (7) for supporting said sheet material;
a camera (9) for making an image record (21) of said pallet (7) positioned in said presentation area comprising said sheet of material;
a sheet cutting unit (3);
a control unit (11) for implementing the method according to any one of claims 1 to 8 ;
A laser flat bed machine (1) comprising:

The camera (9) is attached to the sheet cutting unit (3) and the image recording (21) of the camera (9) is spatially calibrated with respect to the machine coordinate system of the sheet cutting unit (3). 10. The laser flatbed machine of claim 9 , wherein