CN113414503A - High-quality laser cutting quality guarantee system and method - Google Patents
High-quality laser cutting quality guarantee system and method Download PDFInfo
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- CN113414503A CN113414503A CN202110658019.5A CN202110658019A CN113414503A CN 113414503 A CN113414503 A CN 113414503A CN 202110658019 A CN202110658019 A CN 202110658019A CN 113414503 A CN113414503 A CN 113414503A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention relates to a high-quality laser cutting quality guarantee system and a method, wherein the method comprises the following steps: when the fact that the workpiece is placed in the machining area of the laser cutting platform is detected, the image acquisition module and the illumination module are controlled to conduct non-contact detection, image information corresponding to the cutting of the workpiece is determined, and after the cutting seam is generated, the probe is controlled to be inserted into the cutting seam under the control of the follow-up device to conduct contact detection; determining a cutting quality result according to a comparison result of the image information and the reference sample drawing and a detection result of the probe in the cutting seam; when the cutting quality result is qualified, controlling a laser cutting head of the laser cutting platform to continue cutting along the cutting direction; and when the cutting quality result is unqualified, controlling the laser cutting head to retreat to an unqualified position for cutting. The invention can detect the processed workpiece in real time by two detection methods, namely a contact detection method and a non-contact detection method, has high detection efficiency, and can re-cut unqualified workpieces in the processing process by controlling the laser cutting system.
Description
Technical Field
The invention relates to the technical field of industrial detection, in particular to a high-quality laser cutting quality guarantee system and method.
Background
Laser cutting is a common laser processing technology in laser processing, and with the development of industrial technology, people have higher and higher requirements on the quality of various parts. Whether the workpiece is completely cut or not needs to be detected in the process of cutting the workpiece by laser, and no residual waste materials exist. In laser cutting production, the number of workpieces is huge, and the quality of the workpieces cannot be detected by hundreds of percent through traditional sampling inspection. In the laser cutting process, due to the problems of insufficient laser energy and the like, although laser cutting is already carried out, the cutting is incomplete, the workpiece is not completely cut, and scum and uncut parts exist in a cutting seam, so that waste materials are adhered to the workpiece. Due to the complexity of the three-dimensional part and the reduction of the reflection effect of the workpiece after laser cutting, the problems of vision blind areas, unclear image contrast and the like exist only by using machine vision. Therefore, the research on a reliable and effective method and system for guaranteeing the laser cutting quality is a problem to be solved currently.
Disclosure of Invention
In view of the above, there is a need to provide a high-quality laser cutting quality assurance system and method, so as to solve the problem in the prior art that the laser cutting quality cannot be guaranteed efficiently.
The invention provides a high-quality laser cutting quality guarantee system, which comprises a non-contact detection unit, a contact detection unit and a control unit, wherein:
the non-contact detection unit is used for acquiring image information of a workpiece in real time and transmitting the image information to the control unit;
the contact type detection unit is used for detecting whether the cutting seam is cut through by using the probe, generating a probe detection result and transmitting the probe detection result to the control unit;
the control unit is used for controlling the non-contact detection unit and the contact detection unit to work cooperatively, determining a cutting quality result of the laser cutting platform after cutting according to the image information and the probe detection result, and controlling workpiece cutting of the laser cutting platform based on the cutting quality result.
Further, the non-contact detection unit comprises an image acquisition module and an illumination module, wherein:
the image acquisition module is used for acquiring the image information of the workpiece in real time;
the illumination module is used for providing illumination for the image acquisition module.
Further, the contact detection unit includes a follower device and a probe, wherein:
the follow-up device is used for adjusting the movement of the probe under the control of the control unit and transmitting the detection result of the probe to a host on an operation platform in the control unit;
the probe is used for detecting whether the cutting seam is cut through under the driving of the follow-up device, and generating a probe detection result.
Further, the control unit includes a PLC module and an operation platform, wherein:
the operation platform is used for interacting with a user, acquiring and processing a probe detection result and image information and generating a cutting quality result;
the PLC module is used for controlling the follow-up device, the probe, the image acquisition module and the illumination module to work in coordination so as to detect the cutting quality of the laser cutting platform after cutting, the output end of the PLC module is connected with the host of the laser cutting platform, and the PLC module is used for controlling the cutting of the laser cutting platform according to the cutting quality result generated by the host of the operation platform, wherein the image acquisition module continuously works in the process of processing workpieces, and the follow-up device and the probe can work after receiving the control signal of the PLC module.
The invention also provides a high-quality laser cutting quality guarantee method, which is based on the high-quality laser cutting quality guarantee system and comprises the following steps:
when the fact that the workpiece is placed in the machining area of the laser cutting platform is detected, the image acquisition module and the illumination module are controlled to conduct non-contact detection, image information corresponding to the cutting of the workpiece is determined, and after the cutting seam is generated, the probe is controlled to be inserted into the cutting seam under the control of the follow-up device to conduct contact detection;
determining a cutting quality result according to a comparison result of the image information and the reference sample drawing and a detection result of the probe in the cutting seam;
when the cutting quality result is qualified, controlling a laser cutting head of the laser cutting platform to continue cutting along the cutting direction;
and when the cutting quality result is unqualified, controlling the laser cutting head to retreat to an unqualified position for cutting.
Further, the step of placing the workpiece in the machining area of the laser cutting platform when detecting that the workpiece is placed comprises the following steps:
establishing a detection template and acquiring the processing information of the workpiece;
matching a corresponding detection mode for the processing path according to the processing information;
acquiring an image of a qualified workpiece as the reference sample image according to the processing information;
and selecting a detection area, and storing workpiece detection information to a host of the operation platform.
Further, the controlling the image acquisition module and the illumination module to perform non-contact detection, and the determining the image information corresponding to the cutting of the workpiece includes:
controlling an image acquisition module to acquire the image information of workpiece cutting in real time;
comparing the image information with the reference sample image, and judging whether the cutting is qualified or not according to a comparison result;
when the cutting is qualified, controlling the laser cutting system to continue working;
and when the cutting is unqualified, controlling the laser cutting head of the laser cutting system to retreat to the unqualified position for cutting again.
Further, the controlling the image acquisition module and the illumination module to perform non-contact detection and determining the image information corresponding to the cutting of the workpiece further comprises:
if the workpiece rebounds, calculating a rebound value and a rebound direction through an image processing algorithm;
and transmitting the resilience value and the resilience direction to a laser cutting system, wherein a reasonable adjustment angle is calculated by the laser cutting system, the cutting angle of the laser cutting head is modified, and real-time cutting path compensation is carried out.
Further, the control probe inserted into the slit under the control of the follower means comprises:
after the cutting seam is generated, the probe is controlled to be inserted into the cutting seam and moves along a laser cutting path under the adjustment of the follow-up device, and a probe detection result is generated;
the servo device is controlled to transmit the detection result of the probe to a host of the operation platform;
judging a detection result according to the detection result of the probe;
when the detection result is qualified, the laser cutting system continues to work;
and when the detection result is unqualified, the laser cutting system controls the laser cutting head of the laser cutting system to retreat to the unqualified position for cutting again.
Further, still include:
if a workpiece needing to be detected exists, entering the next round of detection, returning to the step of controlling the image acquisition module and the illumination module to carry out non-contact detection when the workpiece is placed in the processing area of the laser cutting platform;
and if no workpiece needs to be detected, controlling to send a standby signal to the PLC module, wherein the PLC module controls the lighting module, the image acquisition module, the follow-up device and the probe to enter a standby state.
Compared with the prior art, the invention has the beneficial effects that: firstly, when a workpiece is detected to be placed in a machining area to start cutting, controlling the image acquisition module and the illumination module to perform non-contact detection so as to identify the cutting quality by the image, and simultaneously controlling the follow-up device and the probe to be inserted into a cutting seam to perform contact detection so as to detect the cutting quality in a probe inserting mode; then, determining a cutting quality result by combining non-contact detection and contact detection; and finally, when the cutting quality result is qualified, allowing cutting, and when the cutting quality result is unqualified, returning to the unqualified position for cutting again, thereby efficiently ensuring the cutting quality. In conclusion, the invention can detect the machined workpiece in real time by two detection methods, namely a contact detection method and a non-contact detection method, has high detection efficiency, and can control the laser cutting system to re-cut unqualified workpieces in the machining process.
Drawings
FIG. 1 is a system architecture diagram of an embodiment of a high quality laser cutting quality assurance system provided by the present invention;
FIG. 2 is a schematic structural diagram of a high-quality laser cutting quality assurance system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating an embodiment of a method for guaranteeing quality of high-quality laser cutting according to the present invention;
FIG. 4 is a flowchart illustrating the steps of detecting the workpiece in step S1 of FIG. 3 according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating one embodiment of non-contact detection provided by the present invention;
FIG. 6 is a flowchart illustrating a touch detection method according to an embodiment of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The embodiment of the present invention provides a high quality laser cutting quality assurance system, and as seen in fig. 1, fig. 1 is a system architecture diagram of an embodiment of the high quality laser cutting quality assurance system provided by the present invention, where the high quality laser cutting quality assurance system includes a non-contact detection unit 001, a contact detection unit 002, and a control unit 003, where:
the non-contact detection unit 001 is used for acquiring image information of a workpiece in real time and transmitting the image information to the control unit;
the contact detection unit 002 is used for detecting whether the cutting seam is cut through by using a probe, generating a probe detection result and transmitting the probe detection result to the control unit;
the control unit 003 is configured to control the non-contact detection unit and the contact detection unit to perform cooperative work, determine a cutting quality result of the laser cutting platform after cutting according to the image information and the probe detection result, and control workpiece cutting of the laser cutting platform based on the cutting quality result.
In the embodiment of the invention, the cutting quality result is determined by combining non-contact detection and contact detection, and the machined workpiece can be detected in real time by using a contact detection method and a non-contact detection method, so that the effective cutting control is carried out.
As a preferred embodiment, the non-contact detection unit includes an image acquisition module and an illumination module, wherein:
the image acquisition module is used for acquiring the image information of the workpiece in real time;
the illumination module is used for providing illumination for the image acquisition module.
As a specific embodiment, the embodiment of the present invention sets the image capturing module and the illumination module to perform effective image detection.
As a preferred embodiment, the contact detection unit comprises a follower device and a probe, wherein:
the follow-up device is used for adjusting the movement of the probe under the control of the control unit and transmitting the detection result of the probe to a host on an operation platform in the control unit;
the probe is used for detecting whether the cutting seam is cut through under the driving of the follow-up device, and generating a probe detection result.
As a specific example, the embodiment of the present invention provides a servo device and a probe to perform effective detection of a probe insertion slit.
As a preferred embodiment, the control unit comprises a PLC module and an operation platform, wherein:
the operation platform is used for interacting with a user, acquiring and processing a probe detection result and image information and generating a cutting quality result;
the PLC module is used for controlling the follow-up device, the probe, the image acquisition module and the illumination module to work in coordination so as to detect the cutting quality of the laser cutting platform after cutting, the output end of the PLC module is connected with the host of the laser cutting platform, and the PLC module is used for controlling the cutting of the laser cutting platform according to the cutting quality result generated by the host of the operation platform, wherein the image acquisition module continuously works in the process of processing workpieces, and the follow-up device and the probe can work after receiving the control signal of the PLC module.
As a specific embodiment, the embodiment of the present invention sets an operation platform and a PLC module to perform effective control.
In a specific embodiment of the present invention, referring to fig. 2, fig. 2 is a schematic system structure diagram of an embodiment of a high-quality laser cutting quality assurance system provided by the present invention, and the system structure diagram includes a laser cutting platform 1, an operation platform 2, a PLC module 3, a follower 4, a probe 5, an image acquisition module 6, and an illumination module 7, where:
the laser cutting platform 1 is used for cutting a workpiece under the control of the PLC module;
the operation platform 2 is used for interacting with a user, acquiring and processing a probe detection result and image information and generating a cutting quality result;
the PLC module 3 is used for controlling the follow-up device, the probe, the image acquisition module and the illumination module to work cooperatively so as to detect the cutting quality of the laser cutting platform after cutting, the output end of the PLC module is connected with a host of the laser cutting platform, and the PLC module is used for controlling the cutting of the laser cutting platform according to the cutting quality result generated by the host of the operation platform;
the follow-up device 4 is used for controlling and adjusting the movement of the probe under the control of the PLC module and transmitting the detection result of the probe to the host on the operation platform;
the probe 5 is used for detecting whether the cutting seam is cut through under the driving of the follow-up device, and generating a probe detection result;
the image acquisition module 6 is used for acquiring the image information of the workpiece in real time and transmitting the image information to a host computer on the operation platform;
the illumination module 7 is configured to provide illumination for the image acquisition module.
In the embodiment of the invention, a laser cutting platform is arranged to cut a workpiece; the detection system comprises a host computer and a display module, wherein the host computer and the display module are arranged on an operation platform and used for interaction between workers and the detection system, the host computer is provided with detection software, and the detection software is used for allocating a detection mode for a processing path and detecting whether a workpiece is qualified or not; the image acquisition module and the illumination module are arranged to carry out non-contact detection, and the qualification of workpiece cutting is judged based on the acquisition of image information; the follow-up device and the probe are arranged to carry out contact type detection, whether the joint is completely cut or not is detected, and whether slag residues exist in the joint is detected; through setting up the PLC module, guarantee the cooperative control of non-contact detection and contact detection to this guarantees cutting effect.
It should be noted that, in the system, the non-contact detection is composed of an image acquisition module and an illumination module; the contact detection device consists of a follow-up device and a probe. The contact detection and the non-contact detection can be used for detecting the workpiece independently, can run simultaneously and can be matched with each other to detect the workpiece.
As a preferred embodiment, the servo device drives the probe to move up and down along the laser cutting head of the laser cutting platform. As a specific embodiment, if the probe detection is needed, the PLC module controls and adjusts the follow-up device and the probe, after the cutting seam is generated, the probe is inserted into the cutting seam and moves along the laser cutting path under the adjustment of the follow-up device, and the follow-up device transmits the detection information to the operation platform.
As a preferred embodiment, the PLC module is specifically configured to control the laser cutting head of the laser cutting platform to continue cutting along the cutting direction when the cutting quality result cooperatively detected by the servo unit, the probe, the image acquisition module, and the illumination module is qualified, and control the laser cutting head to retreat to a position where the cutting is unqualified when the cutting quality result is unqualified. As a specific embodiment, the method and the device determine whether the cutting effect of the cutting process is qualified or not through the cutting quality result cooperatively detected by the contact detection method and the non-contact detection method so as to facilitate real-time adjustment.
The embodiment of the present invention provides a method for guaranteeing high-quality laser cutting quality, and with reference to fig. 3, fig. 3 is a schematic flow chart of an embodiment of the method for guaranteeing high-quality laser cutting quality provided by the present invention, and the system for guaranteeing high-quality laser cutting quality based on the above includes steps S1 to S4, where:
in step S1, when it is detected that the workpiece is placed in the machining area of the laser cutting platform, the image acquisition module and the illumination module are controlled to perform non-contact detection, and image information corresponding to the cutting of the workpiece is determined, and after the kerf is generated, the probe is controlled to be inserted into the kerf under the control of the servo device to perform contact detection;
in step S2, determining a cutting quality result according to a comparison result of the image information and the reference sample and a detection result of the probe in the cutting seam;
in step S3, when the cutting quality result is qualified, controlling the laser cutting head of the laser cutting platform to continue cutting along the cutting direction;
in step S4, when the cutting quality result is not good, the laser cutting head is controlled to retreat to the bad position for cutting.
In the embodiment of the invention, firstly, when the workpiece is detected to be placed in a processing area to start cutting, the image acquisition module and the illumination module are controlled to carry out non-contact detection so as to identify the cutting quality by the image, and meanwhile, the follow-up device and the probe are controlled to be inserted into a cutting seam to carry out contact detection so as to detect the cutting quality in a probe probing mode; then, determining a cutting quality result by combining non-contact detection and contact detection; and finally, when the cutting quality result is qualified, allowing cutting, and when the cutting quality result is unqualified, returning to the unqualified position for cutting again, thereby efficiently ensuring the cutting quality.
As a preferred embodiment, referring to fig. 4, fig. 4 is a schematic flow chart of an embodiment of detecting the workpiece in step S1 in fig. 3 according to the present invention, where step S1 includes steps S11 to S14, where:
in step S11, a detection template is established, and processing information of the workpiece is acquired;
in step S12, matching a corresponding detection method for the machining route according to the machining information;
in step S13, acquiring an image of a qualified workpiece as the reference pattern based on the processing information;
in step S14, the detection area is selected, and the workpiece detection information is saved to the host computer of the operation platform.
As a specific embodiment, the embodiment of the present invention ensures that the workpiece detection information is stored in the host of the operation platform by setting the process of detecting the workpiece and matching the corresponding detection mode.
In one embodiment of the present invention, the specific process of inspecting the workpiece includes:
firstly, starting software and entering a detection system;
secondly, establishing a detection template;
inputting the processing information of the workpiece in the detection system;
fourthly, according to the processing information of the workpiece, the detection system is in a processing path matching detection mode;
fifthly, loading the image of the qualified workpiece as a reference sample image;
sixthly, selecting a detection area;
seventhly, storing the settings;
and eighthly, the detection system stores the workpiece detection information to the host.
As a preferred embodiment, referring to fig. 5, fig. 5 is a schematic flowchart of an embodiment of a non-contact detection method provided by the present invention, where the non-contact detection method includes steps S501 to S504, where:
in step S501, controlling an image acquisition module to acquire the image information of workpiece cutting in real time;
in step S502, comparing the image information with the reference sample, and determining whether the cutting is qualified according to a comparison result;
in step S503, when the cutting is qualified, controlling the laser cutting system to continue working;
in step S504, when the cutting is failed, the laser cutting head of the laser cutting system is controlled to retreat to the failed position for cutting again.
As a specific embodiment, the embodiment of the invention judges whether the workpiece is qualified or not according to the image information so as to effectively control the laser cutting head of the laser cutting system.
In a specific embodiment of the present invention, the specific flow of image information detection includes:
firstly, a workpiece is placed in a machining area, a detection system sends detection information to a PLC module, and a non-contact detection system starts an image acquisition module and an illumination module to detect in real time. If the probe is required to be detected, after the cutting seam is generated, the probe is inserted into the cutting seam under the control of the follow-up device and moves along with the laser beam under the control of the follow-up device;
secondly, the image acquisition module acquires image information of the processed workpiece in real time and sends the image information to the operation platform;
thirdly, the operation platform transmits the image information to a detection system, and the detection system receives the image information and compares the image information with a reference sample image in the detection system;
and fourthly, after the detection is finished, the operating platform sends a signal to the laser cutting system according to the detection result, if the detection result is qualified, the laser cutting system continues to work, the detection result is unqualified, and the laser cutting system controls the laser cutting head to retreat to an unqualified position for cutting again.
As a preferred embodiment, the image information detection process further includes:
if the workpiece rebounds, calculating a rebound value and a rebound direction through an image processing algorithm;
and transmitting the resilience value and the resilience direction to a laser cutting system, wherein a reasonable adjustment angle is calculated by the laser cutting system, the cutting angle of the laser cutting head is modified, and real-time cutting path compensation is carried out.
As a specific embodiment, in the embodiment of the present invention, when the workpiece has springback, the springback value and the springback direction are calculated according to the image information, so as to adjust the cutting angle and perform the path compensation.
In a specific embodiment of the invention, after the detection is finished, the operation platform judges according to the detection result, if the detection result is qualified, the laser cutting system continues to work, if the detection result is unqualified, the unqualified type is judged, and if the laser cutting is not completely cut, the laser cutting head returns to cut again; if the workpiece rebounds, the rebounding value and the rebounding direction are calculated through image processing, the rebounding data are transmitted to the laser cutting system, the laser cutting system calculates a reasonable adjusting angle, the cutting angle of the laser cutting head is modified, and real-time cutting path compensation is carried out.
As a preferred embodiment, referring to fig. 6, fig. 6 is a schematic flowchart of an embodiment of a contact detection provided by the present invention, where the contact detection includes steps S601 to S605, where:
in step S601, after the kerf is generated, the probe is controlled to be inserted into the kerf and move along the laser cutting path under the adjustment of the servo device, so as to generate a probe detection result;
in step S602, the servo device is controlled to transmit the probe detection result to the host of the operation platform;
in step S603, determining a detection result according to the probe detection result;
in step S604, when the detection result is qualified, the laser cutting system continues to operate;
in step S605, when the detection result is not qualified, the laser cutting system controls the laser cutting head of the laser cutting system to retreat to the unqualified position for cutting again.
As a specific embodiment, the embodiment of the invention utilizes the probe to carry out contact detection, and ensures the effective detection of the probe to the lancing.
In a specific embodiment of the present invention, the specific process of probe detection comprises:
firstly, if probe detection is needed, the PLC module controls and adjusts the follow-up device and the probe, after a cutting seam is generated, the probe is inserted into the cutting seam and moves along a laser cutting path under the adjustment of the follow-up device, and the follow-up device transmits detection information to an operation platform;
and secondly, the operating platform transmits the detection information to the detection system, the detection system judges the detection information, the detection result is qualified, the laser cutting system continues to work, the detection result is unqualified, and the laser cutting system controls the laser cutting head to retreat to an unqualified position for cutting again.
As a preferred embodiment, the method further comprises:
if a workpiece needing to be detected exists, entering the next round of detection, returning to the step of controlling the image acquisition module and the illumination module to carry out non-contact detection when the workpiece is placed in the processing area of the laser cutting platform;
and if no workpiece needs to be detected, controlling to send a standby signal to the PLC module, wherein the PLC module controls the lighting module, the image acquisition module, the follow-up device and the probe to enter a standby state.
As a specific embodiment, the embodiment of the invention effectively controls whether the next round of detection is carried out or not, and ensures that each detection part can be in a standby state in time.
As a preferred embodiment, the method further comprises: the image acquisition module continuously works in the process of processing the workpiece, and the follow-up device and the probe can work after receiving the control signal of the PLC module. As a specific embodiment, the embodiment of the invention continuously controls the image acquisition module, the follow-up device and the probe detect under the signal trigger, and a user can select whether to detect the probe or not, thereby ensuring the flexibility of the method.
The invention discloses a high-quality laser cutting quality guarantee system and a method, and the system comprises the following steps of firstly, when a workpiece is detected to be placed in a processing area to start cutting, controlling an image acquisition module and an illumination module to perform non-contact detection so as to identify the cutting quality by an image, and simultaneously controlling a follow-up device and a probe to be inserted into a cutting seam to perform contact detection so as to detect the cutting quality in a probe inserting mode; then, determining a cutting quality result by combining non-contact detection and contact detection; and finally, when the cutting quality result is qualified, allowing cutting, and when the cutting quality result is unqualified, returning to the unqualified position for cutting again, thereby efficiently ensuring the cutting quality.
According to the technical scheme, the cutting quality of the workpiece can be detected in real time in the machining process of the workpiece, two detection modes, namely contact detection and non-contact detection, are matched with each other, the workpiece can be effectively and quickly detected, the posture of a cutting head can be timely adjusted by detecting the rebound of the workpiece in real time, and the laser cutting quality can be effectively improved; because the detection system is connected with the laser cutting system, the workpiece can be processed again in time, the yield is effectively improved, the time for subsequent treatment is reduced, the product quality of the workpiece can be well controlled, the processed workpiece can be detected in real time by using two detection methods, namely a contact detection method and a non-contact detection method, the detection efficiency is high, and the unqualified workpiece can be cut again in the processing process by controlling the laser cutting system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a high quality laser cutting quality assurance system which characterized in that, includes non-contact detecting element, contact detecting element and the control unit, wherein:
the non-contact detection unit is used for acquiring image information of a workpiece in real time and transmitting the image information to the control unit;
the contact type detection unit is used for detecting whether the cutting seam is cut through by using the probe, generating a probe detection result and transmitting the probe detection result to the control unit;
the control unit is used for controlling the non-contact detection unit and the contact detection unit to work cooperatively, determining a cutting quality result of the laser cutting platform after cutting according to the image information and the probe detection result, and controlling workpiece cutting of the laser cutting platform based on the cutting quality result.
2. The quality assurance system for high-quality laser cutting according to claim 1, wherein the non-contact detection unit comprises an image acquisition module and an illumination module, wherein:
the image acquisition module is used for acquiring the image information of the workpiece in real time;
the illumination module is used for providing illumination for the image acquisition module.
3. The system of claim 2, wherein the contact detection unit comprises a follower and a probe, and wherein:
the follow-up device is used for adjusting the movement of the probe under the control of the control unit and transmitting the detection result of the probe to a host on an operation platform in the control unit;
the probe is used for detecting whether the cutting seam is cut through under the driving of the follow-up device, and generating a probe detection result.
4. The quality assurance system for high-quality laser cutting according to claim 3, wherein the control unit comprises a PLC module and an operation platform, wherein:
the operation platform is used for interacting with a user, acquiring and processing a probe detection result and image information and generating a cutting quality result;
the PLC module is used for controlling the follow-up device, the probe, the image acquisition module and the illumination module to work in coordination so as to detect the cutting quality of the laser cutting platform after cutting, the output end of the PLC module is connected with the host of the laser cutting platform, and the PLC module is used for controlling the cutting of the laser cutting platform according to the cutting quality result generated by the host of the operation platform, wherein the image acquisition module continuously works in the process of processing workpieces, and the follow-up device and the probe can work after receiving the control signal of the PLC module.
5. A high-quality laser cutting quality assurance method, based on the high-quality laser cutting quality assurance system of any one of claims 1 to 4, the high-quality laser cutting quality assurance method comprising:
when the fact that the workpiece is placed in the machining area of the laser cutting platform is detected, the image acquisition module and the illumination module are controlled to conduct non-contact detection, image information corresponding to the cutting of the workpiece is determined, and after the cutting seam is generated, the probe is controlled to be inserted into the cutting seam under the control of the follow-up device to conduct contact detection;
determining a cutting quality result according to a comparison result of the image information and the reference sample drawing and a detection result of the probe in the cutting seam;
when the cutting quality result is qualified, controlling a laser cutting head of the laser cutting platform to continue cutting along the cutting direction;
and when the cutting quality result is unqualified, controlling the laser cutting head to retreat to an unqualified position for cutting.
6. The method of claim 5, wherein the step of detecting that the workpiece is placed in the processing area of the laser cutting platform comprises the following steps:
establishing a detection template and acquiring the processing information of the workpiece;
matching a corresponding detection mode for the processing path according to the processing information;
acquiring an image of a qualified workpiece as the reference sample image according to the processing information;
and selecting a detection area, and storing workpiece detection information to a host of the operation platform.
7. The method of claim 5, wherein the controlling the image capturing module and the illuminating module to perform non-contact detection and determining the image information corresponding to the cutting of the workpiece comprises:
controlling an image acquisition module to acquire the image information of workpiece cutting in real time;
comparing the image information with the reference sample image, and judging whether the cutting is qualified or not according to a comparison result;
when the cutting is qualified, controlling the laser cutting system to continue working;
and when the cutting is unqualified, controlling the laser cutting head of the laser cutting system to retreat to the unqualified position for cutting again.
8. The method of claim 7, wherein the controlling the image capturing module and the illuminating module to perform non-contact detection and determining the image information corresponding to the cutting of the workpiece further comprises:
if the workpiece rebounds, calculating a rebound value and a rebound direction through an image processing algorithm;
and transmitting the resilience value and the resilience direction to a laser cutting system, wherein a reasonable adjustment angle is calculated by the laser cutting system, the cutting angle of the laser cutting head is modified, and real-time cutting path compensation is carried out.
9. The method of claim 5, wherein the controlling the probe to be inserted into the kerf under the control of the servo comprises:
after the cutting seam is generated, the probe is controlled to be inserted into the cutting seam and moves along a laser cutting path under the adjustment of the follow-up device, and a probe detection result is generated;
the servo device is controlled to transmit the detection result of the probe to a host of the operation platform;
judging a detection result according to the detection result of the probe;
when the detection result is qualified, the laser cutting system continues to work;
and when the detection result is unqualified, the laser cutting system controls the laser cutting head of the laser cutting system to retreat to the unqualified position for cutting again.
10. The quality assurance method for high-quality laser cutting according to claim 5, further comprising:
if a workpiece needing to be detected exists, entering the next round of detection, returning to the step of controlling the image acquisition module and the illumination module to carry out non-contact detection when the workpiece is placed in the processing area of the laser cutting platform;
and if no workpiece needs to be detected, controlling to send a standby signal to the PLC module, wherein the PLC module controls the lighting module, the image acquisition module, the follow-up device and the probe to enter a standby state.
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