JP2014054640A - Laser processing system and laser processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire actual material shape information on a material having different thicknesses and control processing by cutting condition information based on the acquired material shape information.SOLUTION: A laser processing system 1 includes an NC device 2. The NC device 2 calculates actual thickness information on a current processing point and material information on a processing target by means of NC data 3 and an image processing device 4, collates the information with a cutting condition table 5, acquires cutting condition information suitable for a current thickness and a material, and processes the processing target based on the information.

Description

  The present invention relates to a laser processing system and a method thereof, and more particularly, in laser processing, a laser processing system and method for acquiring material shape information from an actual product and controlling the processing under cutting conditions based on the material shape information About.

  Steel materials (angle materials, channel materials, etc.) are not uniform in thickness. In standards (JIS standards, etc.) that specify the accuracy of the cross-sectional dimension (sheet thickness) of steel materials, a considerable error is allowed in the cross-sectional dimension accuracy. When such a steel material is subjected to laser processing (cutting), the processing is performed under cutting conditions according to the thickest thickness of the cut surface.

  See also Patent Document 1.

JP-A-10-235495

  Since the allowable amount of the cross-sectional dimension in the standard (variation in plate thickness) is large, the following defective cutting may be caused.

  When the plate thickness of the cut portion is thinner than expected, a cut surface defect occurs due to excessive heat input during cutting.

  When the thickness of the cut portion is thicker than expected, a cutting failure (uncut) due to insufficient heat input occurs.

  The present invention provides a system and method for obtaining a good cut surface and stable processing by performing processing under appropriate processing conditions when performing laser processing on a material having a non-uniform plate thickness and a large variation in plate thickness. With the goal.

The present invention is for solving the above-mentioned problems, and the invention according to claim 1 is a laser processing system including a control device,
Material shape information is acquired from an actual product, and the control device controls processing by cutting condition information based on the acquired material shape information.

  In the invention according to claim 2, the actual plate thickness information of the current machining point and the material information of the machining target are calculated from the NC data and the image processing apparatus, the information is collated with the cutting condition table, and the current plate thickness is calculated. The cutting condition information suitable for the material is acquired, and the processing is controlled based on the cutting condition information.

  The invention according to claim 3 is characterized in that the steel material to be processed is an angle material or a channel material.

The invention according to claim 4 is a laser processing method including a control device,
Material shape information is acquired from an actual product, and the control device controls processing by cutting condition information based on the acquired material shape information.

  Acquire actual thickness information of the workpiece. And since the cutting conditions are determined based on the actual thickness information, processing is performed even if there are variations in the thickness of each material, making it possible to process with optimal cutting conditions, reducing cutting surface defects and cutting defects. There is an effect that can be done.

  As a result, it is possible to reduce the reworking time, additional material cost, and additional processing cost (labor cost, electricity, assist gas cost, etc.) required to follow the cutting failure.

It is the schematic which shows the outline of a laser processing system. (A), (b) is explanatory drawing explaining an angle material (angle-shaped steel). (A), (b) is explanatory drawing explaining a channel material (channel steel). It is the schematic which shows the outline of a laser processing machine. It is explanatory drawing explaining a laser processing head. It is explanatory drawing explaining a main chuck | zipper. It is explanatory drawing explaining rotation of material. It is explanatory drawing explaining the arrangement position of a digital camera. It is explanatory drawing explaining an imaging result. (A)-(d) is explanatory drawing which a laser processing machine operate | moves. It is explanatory drawing explaining material shape information.

  Embodiments of the present invention will be described below with reference to the drawings.

  Please refer to FIG. The laser processing system 1 of the present invention is a system applied to processing steel materials appropriately.

  The laser processing system 1 is an NC (Numerical Control) device (an NC device as an example of a control device. That is, the control device is a concept including an NC device) 2, NC data 3, and an image processing device. 4 and a cutting condition table 5.

  The NC device 2 is configured by a computer, connected to the laser processing machine LM, and controls the laser processing machine LM.

  The NC data (or also referred to as a machining program) 3 is set in the NC device 2 and machining is performed based on the NC data 3. Further, it includes processing position information, material information for processing, and the like.

  The cutting condition table 5 is stored in the NC device 2. It holds the cutting conditions (output, frequency, duty, etc.) according to the material to be processed and the plate thickness.

  The image processing device 4 is connected to the NC device 2 and the digital camera DC (see FIG. 8). From the digital camera image of the digital camera DC, the cross-sectional shape of the steel material (angle material Wa, channel material Wc, etc.) and the positional relationship information between the laser processing machine LM and the steel material are extracted and provided to the NC device 2.

  Here, with reference to FIGS. 2-7, the steel material used as the object of a process in this example and the laser processing machine LM are demonstrated.

  FIG. 2A shows an angle material (angle steel) Wa. FIG. 2B shows a cross-sectional shape (cross-section AA) of the angle member Wa.

  FIG. 3A shows a channel material (grooved steel) Wc. FIG. 3B shows a cross-sectional shape (cross-section BB) of the channel material Wc.

  Thus, it can be seen that the angle material Wa, the channel material Wc, and the like are not uniform in thickness. In addition, the standards (JIS standards, etc.) that specify the cross-sectional dimension (plate thickness) accuracy of the angle material Wa, channel material Wc, etc. allow for considerable errors in the cross-sectional dimension accuracy. It is.

  Please refer to FIG. The laser processing machine LM sets an angle material Wa, a channel material Wc, etc., and performs laser processing. For example, as shown in the enlarged view of the angle material Wa, laser processing is performed to obtain the component P.

  A schematic configuration of the laser processing machine LM will be described. The laser processing machine LM includes a moving mechanism MV, a laser processing head LH provided in the moving mechanism MV, a main chuck MC, and a sub chuck SC.

  Please refer to FIG. The laser processing head LH is configured to be movable in the XYZ axis directions indicated by the coordinate system Dim (see FIG. 4) and to be stopped at a predetermined position by the moving mechanism MV. And laser LT is irradiated and a steel material is cut.

  Please refer to FIG. A steel material is rotatably supported by the main chuck MC. The steel material is also supported by the sub chuck SC.

  Reference is made to FIGS. The rotation of the angle material Wa and the channel material Wc is shown. That is, the laser processing machine LM supports the steel material, and irradiates the laser LT from the laser processing head LH while rotating and stopping (rotating and stopping in the directions of the arrows AR1 and AR2) about the A axis. Laser cutting is performed along a processing locus on a flat surface or the like.

  Please refer to FIG. An arrangement position of a digital camera DC (or a CCD camera or the like) as an example of an imaging apparatus is shown. The digital camera DC is installed in the laser processing machine LM in parallel with the longitudinal direction of the steel material, and can capture an actual cross-sectional shape of the steel material. The steel material set in the laser processing machine LM is photographed before starting the processing.

  Refer to FIGS. 9A and 9B.

When taken the cross-sectional shape of angle members Wa, as shown in FIG. 9 (a), in the material shape information, the thickness T _1, it can be seen that the thickness T ₂ are different.

When taken a channel member Wc, as shown in FIG. 9 (b), in the material shape information, the thickness T _3, it can be seen that the thickness T ₄ are different.

  As a result, the NC device 2 can calculate the actual plate thickness information of the current processing point and the material information of the processing target from the NC data 3 and the image processing device 4. Then, the information is collated with the cutting condition table 5, the cutting condition information most suitable for the current material and plate thickness is obtained, and processing is performed using the cutting condition information. Since cutting conditions are determined based on actual plate thickness information, stable processing is performed.

  10A to 10D show the operation of the laser processing machine LM. In this example, as an example of the steel material, processing for obtaining the component P from the angle material Wa is shown.

  Here, the rotation direction of the angle member Wa is defined. It is defined as “clockwise rotation” and “counterclockwise rotation” when viewed from the direction (arrow AR3 direction) in which the digital camera DC shown in FIG. 8 takes an image.

  Reference is made to FIG. Laser processing is performed on the angle member Wa held by the main chuck MC while the laser processing head LH moves in the direction of the arrow ARa.

  Reference is made to FIG. The angle material Wa gripped by the main chuck MC rotates counterclockwise by 90 degrees, and then the laser processing head LH performs laser processing while moving in the arrow ARb direction.

  Reference is made to FIG. The angle material Wa gripped by the main chuck MC rotates 90 degrees clockwise. Further, the laser processing head LH moves to a predetermined position in another processing part of the part P. Then, laser processing is performed while the laser processing head LH moves in the direction of the arrow ARc.

  Reference is made to FIG. The angle material Wa held by the main chuck MC rotates 90 degrees counterclockwise, and laser processing is performed while the laser processing head LH moves in the arrow ARd direction.

  Please refer to FIG. Corresponding to the operation described in FIG. 10, the material shape information captured by the digital camera DC is shown.

  As described above, the rotation direction of the angle member Wa is defined as “clockwise rotation” and “counterclockwise rotation” when viewed from the direction (arrow AR3 direction) taken by the digital camera DC shown in FIG.

  In step SP01, the digital camera DC images the angle material Wa gripped by the main chuck MC to obtain material shape information.

  Then, the NC device 2 calculates actual plate thickness information of the current processing point and material information of the processing object from the NC data 3 and the image processing device 4. The information is collated with the cutting condition table 5, the cutting condition information most suitable for the current material and plate thickness is obtained, and processing is performed using the cutting condition information.

  In step SP02, the angle member Wa turns counterclockwise by 90 degrees.

  In step SP03, imaging is continued and processing is continued with appropriate cutting condition information.

  In step SP04, the angle material Wa turns 90 degrees clockwise.

  In step SP05, imaging is continued and processing is performed with appropriate cutting condition information.

  In step SP06, the angle material Wa turns counterclockwise by 90 degrees.

  In step SP07, imaging is continued and processing is performed with appropriate cutting condition information.

  The present invention is not limited to the embodiments of the invention described above, and can be implemented in other modes by making appropriate modifications.

DESCRIPTION OF SYMBOLS 1 Laser processing system 2 NC apparatus 3 NC data 4 Image processing apparatus 5 Cutting condition table LM Laser processing machine MV Movement mechanism LH Laser head MC Main chuck SC Sub chuck Wa Angle (Angle)
Wb channel (channel steel)
P parts

Claims (4)

In a laser processing system equipped with a control device,
A laser processing system, wherein material shape information is acquired from an actual product, and the control device performs processing control using cutting condition information based on the acquired material shape information.   Calculate the actual plate thickness information of the current machining point and the material information of the machining target from the NC data and the image processing device, collate the information with the cutting condition table, and cut condition information suitable for the current plate thickness and material. The laser processing system according to claim 1, wherein processing is controlled based on the cutting condition information.   The laser processing system according to claim 1 or 2, wherein the steel material to be processed is an angle material or a channel material. In a laser processing method provided with a control device,
A laser processing method, wherein material shape information is acquired from an actual product, and the control device performs processing control using cutting condition information based on the acquired material shape information.

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