CN111545898A - Laser head control system and method and laser head - Google Patents
Laser head control system and method and laser head Download PDFInfo
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- CN111545898A CN111545898A CN202010402342.1A CN202010402342A CN111545898A CN 111545898 A CN111545898 A CN 111545898A CN 202010402342 A CN202010402342 A CN 202010402342A CN 111545898 A CN111545898 A CN 111545898A
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- laser head
- main controller
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
- B23K26/048—Automatically focusing the laser beam by controlling the distance between laser head and workpiece
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- 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
-
- 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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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser head control system and method and a laser head. The system comprises a main controller, a focusing motor, a collimating mirror and a display screen, wherein the main controller, the focusing motor, the collimating mirror and the display screen are arranged in a laser head main body; the focusing motor is connected with the main controller and the collimating lens and is used for controlling the collimating lens to move according to a focusing signal sent by the main controller; the main controller is used for determining the moving distance of the collimating mirror according to the received feedback signal; the main controller is also used for determining the focal position of the laser head according to the movement distance of the collimating mirror and the incidence relation between the preset movement distance of the collimating mirror and the movement distance of the focal position; the invention provides a simplified method for determining the focal position, which determines the focal position of a laser head by directly reading the feedback signal of a focusing motor.
Description
Technical Field
The embodiment of the invention relates to the technical field of laser heads, in particular to a laser head control system and method and a laser head.
Background
With the continuous expansion of laser application, the demand of lasers, especially high-power lasers, is increasing day by day, and the high-power lasers can cut thick plates and can improve the cutting efficiency of thin plates, so that the laser cutting device is widely applied.
In the prior art, the focal position of the high-power laser head is determined by a grating sensor arranged in the laser head, and the focal position is determined in a mode that an additional device needs to be arranged in the laser head, so that the cost and the volume of laser head equipment are increased.
Disclosure of Invention
The invention provides a laser head control system and a laser head, which are used for simplifying the process of determining the focal position of the laser head.
In a first aspect, an embodiment of the present invention provides a laser head control system, where the system includes a main controller, a focusing motor, a collimating mirror, and a display screen, where the main controller, the focusing motor, the collimating mirror, and the display screen are arranged in a laser head main body; wherein:
the focusing motor is connected with the main controller and the collimating lens and used for controlling the collimating lens to move according to a focusing signal sent by the main controller so as to adjust the focus position of the laser head;
the main controller is used for receiving a feedback signal of the focusing motor and determining the moving distance of the collimating mirror according to the feedback signal;
the main controller is also used for determining the focal position of the laser head according to the movement distance of the collimating mirror and the incidence relation between the preset movement distance of the collimating mirror and the movement distance of the focal position;
the display screen is connected with the main controller and used for receiving the focal position of the laser head sent by the main controller and displaying the focal position.
Optionally, the main controller further includes a positioning module, and the positioning module is configured to:
and acquiring the position information of the laser head and feeding back the position information of the laser head to a background server so that the background server can distribute and position the laser head.
Optionally, the main controller further includes a protection module, and the protection module is configured to:
the length of time of use of detection laser head is detecting when the length of time of use of laser head reaches the length of time of use threshold value, control the focusing motor of laser head stops work to the lock is died the laser head.
A lens group is also arranged in the laser head main body and comprises a collimating lens, a collimating protective lens, a focusing lens and a focusing protective lens;
correspondingly, the system also comprises temperature sensors correspondingly arranged at different lens positions, and cooling channels and flow valves correspondingly arranged at different lens positions;
the temperature sensor and the flow valve are respectively connected with the main controller;
the temperature sensor is used for acquiring temperature information of the lens at the corresponding position in real time and feeding the acquired temperature information back to the main controller;
and the main controller controls the size of the flow valve of the cooling channel to cool the lens at the corresponding position according to the received temperature information, so that the temperature of the lens in the lens group is kept within the temperature threshold range.
Optionally, the system further comprises a humidity sensor;
the humidity sensor is arranged in the laser head main body and connected with the main controller;
the humidity sensor is used for collecting humidity information in the laser head and feeding the humidity information back to the main controller;
the main controller compares the humidity information with a humidity threshold value, and when the humidity information is larger than the humidity threshold value, the laser head is controlled to stop working.
Optionally, the system further comprises a pressure sensor;
the pressure sensor is arranged in the laser head main body and connected with the main controller;
the pressure sensor is used for detecting the air pressure value in the laser head body in real time and sending the air pressure value to the display screen through the main controller for displaying.
Optionally, the system further comprises a lens protection sensor;
the lens protection sensor is arranged in the laser head main body, is connected with the main controller and is used for detecting whether a focusing protection lens is installed in the laser head main body or not and feeding back a detection result to the main controller;
and if the main controller receives the detection result that the focusing protection lens is not installed in the laser head main body, generating an alarm signal to alarm and remind.
Optionally, the system further comprises a signal lamp;
the signal lamp is arranged on the laser head main body and connected with the main controller;
the signal lamp is used for generating corresponding prompt information according to the information detected by the sensor.
In a second aspect, an embodiment of the present invention further provides a laser head control method, where the method includes:
the focusing signal is sent to a focusing motor, and the focusing motor is controlled to move the collimating mirror according to the focusing signal so as to adjust the focus position of the laser head;
receiving a feedback signal of the focusing motor, and determining the moving distance of the collimating mirror according to the feedback signal;
and determining the focal position of the laser head according to the movement distance of the collimating mirror and the incidence relation between the preset movement distance of the collimating mirror and the movement distance of the focal position, and sending the focal position of the laser head to a display screen for displaying.
In a third aspect, the embodiment of the present invention further provides a laser head, including a laser head main body, and the laser head further includes a laser head control system as described in any one of the embodiments of the present invention, located on or in the laser head main body.
According to the laser head focus position determining method, the main controller arranged in the laser head main body is connected with the focusing motor, the main controller directly reads a moving signal fed back by the focusing motor, the moving distance of the collimating mirror is determined according to the signal, and then the focus position of the laser head is determined according to the preset incidence relation between the moving distance of the collimating mirror and the moving distance of the focus position. The invention provides a simplified method for determining the focal position, which determines the focal position of a laser head by directly reading the feedback signal of a focusing motor.
Drawings
Fig. 1 is a schematic structural diagram of a laser head control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a laser head control system according to a second embodiment of the present invention;
fig. 3 is a flowchart of a laser head control method according to a third embodiment of the present invention;
fig. 4 is a laser head according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a laser head control system according to an embodiment of the present invention, which is applicable to determining a focal position of a laser head, and referring to fig. 1, the laser head control system includes: the main controller 11, the focusing motor 12, the collimating mirror 13 and the display screen 14 are arranged in the laser head main body;
the focusing motor 12 is connected with the main controller 11 and the collimating mirror 13, and is used for controlling the collimating mirror 13 to move according to a focusing signal sent by the main controller 11 so as to adjust the focal position of the laser head.
In this embodiment, the collimating mirror 13 is driven by the focusing motor 12 to move up and down, and when the collimating mirror 13 moves up and down, the focal position of the laser head can also move up and down, and the collimating mirror 13 is driven by controlling the focusing motor 12 to move up and down, so that the focal position of the laser head can be adjusted.
The main controller 11 is configured to receive a feedback signal of the focus motor 12, and determine a moving distance of the collimator lens 13 according to the feedback signal.
In this embodiment, the focusing motor 12 feeds back a specific movement signal to the main controller 11 when moving, and the main controller 11 determines the movement distance of the collimator lens 13 according to the feedback information.
The main controller 11 is further configured to determine the focal position of the laser head according to the moving distance of the collimator lens 13 and a correlation between the preset moving distance of the collimator lens 13 and the focal position moving distance.
For the laser head, the moving distance of the collimator 13 and the moving distance of the focal position are in a certain correlation, for example, the moving distance of the collimator 13 and the moving distance of the focal position may be in a linear relationship, and the focal position information of the laser head may be directly obtained according to the moving distance of the collimator 13 determined by the main controller 11 and the linear relationship.
And the display screen 14 is connected with the main controller 11 and used for receiving and displaying the focal position of the laser head sent by the main controller 11.
In this embodiment, after obtaining the focal position of the laser head, the main controller 11 sends the position information to the display screen 14 for displaying, so as to facilitate the user to visually obtain the focal position of the laser head.
According to the technical scheme, the simplified method for determining the focal position is provided, the focal position of the laser head is determined by directly reading the feedback signal of the focusing motor 12, compared with the prior art, the method does not need to add a grating sensor, and the volume and the cost of laser head equipment are reduced.
Example two
Fig. 2 is a schematic structural diagram of a laser head control system according to a second embodiment of the present invention, and this embodiment further details the laser head control system on the basis of the second embodiment. Referring to fig. 2, in particular, the main controller 11 further includes a positioning module 111 and a protection module 112.
The positioning module 111 is used for acquiring position information of the laser head and feeding back the position information of the laser head to the background server, so that the background server can perform distribution positioning on the laser head.
In this embodiment, when the laser head is powered on to work, the positioning module 111 acquires the position information of the laser head, feeds the position information back to the background server, and determines the position information of the laser head by positioning and judging the laser head, so that the position information of the laser head can be provided for a rear-end manufacturer, and the rear-end manufacturer can track the use condition of the laser head conveniently. Further, the positioning module 111 further includes short-distance communication functions such as bluetooth and wifi, which facilitates signal transmission between the main controller 11 and the mobile terminal.
Optionally, the main controller 11 further includes a protection module 112, the protection module 112 is used for detecting the service time of the laser head, and when detecting that the service time of the laser head reaches the service time threshold, the focusing motor 12 of the laser head is controlled to stop working so as to lock the laser head. According to the method, the use duration of the laser head is controlled, the risk that the laser head is damaged due to the fact that the use duration is too long can be avoided, and safety of the laser head in the use process is improved.
On the basis of the above embodiment, a lens group is further arranged in the laser head body, and the lens group includes a collimating lens 13, a collimating protective lens 15, a focusing lens 16 and a focusing protective lens 17;
correspondingly, the system also comprises temperature sensors 18 correspondingly arranged at different lens positions and cooling channels and flow valves 19 correspondingly arranged at different lens positions.
The cooling channel may include any cooling fluid that can be used for cooling, and for example, the cooling channel may be a water-cooling channel.
In this embodiment, four sets of lenses are provided in the laser head main body, and a temperature sensor 18, a cooling channel, and a flow valve 19 are provided at corresponding positions of each set of lenses.
The temperature sensor 18 and the flow valve 19 are respectively connected with the main controller 11, and the temperature sensor 18 is used for acquiring temperature information of a lens at a corresponding position in real time and feeding back the acquired temperature information to the main controller 11; and the main controller 11 controls the size of the flow valve 19 of the cooling channel according to the received temperature information to cool the lens at the corresponding position, so that the temperature of the lens in the lens group is kept within the temperature threshold range. The size of the flow valve 19 is adjusted according to the temperature of the lenses at different positions, and then the temperature of the lenses at different positions is controlled by adjusting the flow of the cooling liquid, so that the lenses can be always in a stable working range, and the laser head can be guaranteed to normally and safely operate in the working process.
Optionally, the system further includes a humidity sensor 20, where the humidity sensor 20 is disposed in the laser head main body and connected to the main controller 11.
In this embodiment, the water route can appear sometimes in the inside of laser head main part and reveal and seal the problem etc. these problems all can lead to the inside humidity increase of laser head main part, through utilizing humidity sensor 20 real-time inside humidity information of collection laser head, when humidity information is greater than the humidity threshold, show that current laser head is inside to break down, main control unit 11 can control the laser head stop work this moment to ensure the security in the laser head use.
Optionally, the system further comprises a pressure sensor 21, wherein the pressure sensor 21 is arranged in the laser head main body and connected with the main controller 11.
The pressure sensor 21 is used for detecting the air pressure value in the laser head body in real time and sending the air pressure value to the display screen 14 through the main controller 11 for displaying.
In this embodiment, when the laser head is cutting, need let in some gas pressure inside the laser head cavity, different atmospheric pressure values are corresponded to different cutting thickness, and unsuitable atmospheric pressure value can directly influence the cutting efficiency of laser head. In an actual operation scene, the condition that the operator forgets to start the laser head to work when opening the gas exists, and the lens of the laser head is seriously damaged by the start-up work under the condition, so that proper gas pressure is introduced in the cutting process.
The pressure sensor 21 feeds back the acquired air pressure value to the main controller 11, the main controller 11 displays the acquired air pressure value on the display screen 14 in real time, the air pressure value in the laser head can be provided for an operator in time, and the condition that the operator starts the laser head to work due to forgetting to start the laser head is avoided; in addition, a reference voltage value can be provided for the current cutting work of the laser head by displaying the air pressure value in real time, and an operator can adjust the reference voltage during the work according to the air pressure value displayed during the current normal work so as to ensure that the work is in a safe air pressure value range.
Further, this system still includes lens protection sensor 22, lens protection sensor 22 sets up in the laser head main part, with main control unit 11 links to each other for detect whether install focus protection mirror 17 piece in the laser head main part and with the testing result feedback extremely main control unit 11, if main control unit 11 receives the testing result of not installing focus protection mirror 17 in the laser head main part, then generate alarm signal and report to the police and remind.
In this embodiment, when the operator uses the laser head to perform work, if the lens is replaced, the operator may forget to mount the lens and turn on the laser head, which may damage the alignment straight mirror 13 and the focusing mirror 16. Whether the focusing protective lens 17 is installed in the laser head main body is detected by arranging the lens protective sensor 22, and when the focusing protective lens 17 is not installed, the main controller 11 generates an alarm signal to alarm and remind an operator so as to avoid loss.
Optionally, the system further includes a signal lamp 23, the signal lamp 23 is disposed on the laser head main body and connected to the main controller 11, and the signal lamp 23 is configured to generate corresponding prompt information according to the information detected by the sensor.
In this embodiment, the signals that different sensors obtained can set up different signal lamp 23 and show the signal, according to the signal that corresponds, the trouble of the inside corresponding position department of definite laser head that can correspond conveniently carries out troubleshooting.
EXAMPLE III
Fig. 3 is a flowchart of a laser head control method according to a third embodiment of the present invention, where this embodiment is applicable to a case of controlling a laser head, and the method can be executed by a main controller in a laser head control system, and specifically includes the following steps:
and S310, a focusing signal is sent to a focusing motor, and the focusing motor is controlled to move the collimating lens according to the focusing signal so as to adjust the focus position of the laser head.
In this embodiment, the focusing motor is used for driving the collimating mirror to move up and down according to the focusing signal, and the collimating mirror can make the focus position of the laser head also move to a certain extent when moving up and down, so that the focusing motor drives the collimating mirror to move, and the focus position of the laser head can be adjusted.
And S320, receiving a feedback signal of the focusing motor, and determining the moving distance of the collimating mirror according to the feedback signal.
Specifically, the focusing motor feeds back the movement information of the focusing motor to the main controller in the movement process, and the movement distance of the collimating mirror can be correspondingly determined according to the movement information in the feedback signal.
S330, determining the focal position of the laser head according to the moving distance of the collimating mirror and the incidence relation between the preset moving distance of the collimating mirror and the moving distance of the focal position, and sending the focal position of the laser head to a display screen for displaying.
In this embodiment, a certain correlation exists between the moving distance of the collimator lens and the moving distance of the focal position, for example, the correlation may be a linear relationship, and according to the linear relationship and the moving distance of the collimator lens, the moving distance of the focal point of the laser head may be calculated, so as to determine the focal position of the laser head. After the focal position of the laser head is obtained, the focal position of the laser head is sent to a display screen to be displayed, so that a user can conveniently obtain the focal position of the laser head in real time.
Example four
Fig. 4 shows a laser head 40 according to a fourth embodiment of the present invention, where the laser head 40 includes a laser head main body 41, and further includes a laser head control system 42 in the above embodiment, which is located on the laser head main body 41 or in the laser head main body 41. A laser head control system 42 is arranged in the laser head main body 41 or on the laser head main body 41, and a main controller in the laser head control system 42 determines the moving distance of the laser head 40 by directly acquiring the moving distance of the focusing motor 12, so that the determination process of the focal position of the laser head 40 is simplified; this laser head control system 42 still carries out the omnidirectional to laser head 40 through the sensor that sets up the different grade type to security in the guarantee laser head 40 working process, in addition, still control system still possesses orientation module 111, can realize carrying out location tracking to laser head 40's in service behavior.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A laser head control system is characterized by comprising a main controller, a focusing motor, a collimating mirror and a display screen, wherein the main controller, the focusing motor, the collimating mirror and the display screen are arranged in a laser head main body; wherein:
the focusing motor is connected with the main controller and the collimating lens and used for controlling the collimating lens to move according to a focusing signal sent by the main controller so as to adjust the focus position of the laser head;
the main controller is used for receiving a feedback signal of the focusing motor and determining the moving distance of the collimating mirror according to the feedback signal;
the main controller is also used for determining the focal position of the laser head according to the movement distance of the collimating mirror and the incidence relation between the preset movement distance of the collimating mirror and the movement distance of the focal position;
the display screen is connected with the main controller and used for receiving the focal position of the laser head sent by the main controller and displaying the focal position.
2. The system of claim 1, wherein the master controller further comprises a positioning module to:
and acquiring the position information of the laser head and feeding back the position information of the laser head to a background server so that the background server can distribute and position the laser head.
3. The system of claim 1, wherein the master controller further comprises a protection module configured to:
the length of time of use of detection laser head is detecting when the length of time of use of laser head reaches the length of time of use threshold value, control the focusing motor of laser head stops work to the lock is died the laser head.
4. The system of claim 1 wherein a lens set is also disposed within the laser head body, the lens set including a collimating lens, a collimating protective lens, a focusing lens, and a focusing protective lens;
correspondingly, the system also comprises temperature sensors correspondingly arranged at different lens positions, and cooling channels and flow valves correspondingly arranged at different lens positions;
the temperature sensor and the flow valve are respectively connected with the main controller;
the temperature sensor is used for acquiring temperature information of the lens at the corresponding position in real time and feeding the acquired temperature information back to the main controller;
and the main controller controls the size of the flow valve of the cooling channel to cool the lens at the corresponding position according to the received temperature information, so that the temperature of the lens in the lens group is kept within the temperature threshold range.
5. The system of claim 1, further comprising a humidity sensor;
the humidity sensor is arranged in the laser head main body and connected with the main controller;
the humidity sensor is used for collecting humidity information in the laser head and feeding the humidity information back to the main controller;
the main controller compares the humidity information with a humidity threshold value, and when the humidity information is larger than the humidity threshold value, the laser head is controlled to stop working.
6. The system of claim 1, further comprising a pressure sensor;
the pressure sensor is arranged in the laser head main body and connected with the main controller;
the pressure sensor is used for detecting the air pressure value in the laser head body in real time and sending the air pressure value to the display screen through the main controller for displaying.
7. The system of claim 1, further comprising a lens protection sensor;
the lens protection sensor is arranged in the laser head main body, is connected with the main controller and is used for detecting whether a focusing protection lens is installed in the laser head main body or not and feeding back a detection result to the main controller;
and if the main controller receives the detection result that the focusing protection lens is not installed in the laser head main body, generating an alarm signal to alarm and remind.
8. The system of claim 1, further comprising a signal light;
the signal lamp is arranged on the laser head main body and connected with the main controller;
the signal lamp is used for generating corresponding prompt information according to the information detected by the sensor.
9. A laser head control method based on the laser head control system according to any one of claims 1 to 8, characterized in that the method comprises:
the focusing signal is sent to a focusing motor, and the focusing motor is controlled to move the collimating mirror according to the focusing signal so as to adjust the focus position of the laser head;
receiving a feedback signal of the focusing motor, and determining the moving distance of the collimating mirror according to the feedback signal;
and determining the focal position of the laser head according to the movement distance of the collimating mirror and the incidence relation between the preset movement distance of the collimating mirror and the movement distance of the focal position, and sending the focal position of the laser head to a display screen for displaying.
10. A laser head comprising a laser head body, characterised in that the laser head further comprises a laser head control system as claimed in any one of claims 1 to 8 located on or in the laser head body.
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| CN202010402342.1A CN111545898A (en) | 2020-05-13 | 2020-05-13 | Laser head control system and method and laser head |
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| CN202010402342.1A CN111545898A (en) | 2020-05-13 | 2020-05-13 | Laser head control system and method and laser head |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113720582A (en) * | 2021-09-02 | 2021-11-30 | 深圳软动智能控制有限公司 | Laser head fault acquisition method and device, laser equipment and storage medium |
| CN114406510A (en) * | 2022-02-25 | 2022-04-29 | 深圳软动智能控制有限公司 | Laser head focusing control device and system |
| CN115178857A (en) * | 2022-08-26 | 2022-10-14 | 苏州创鑫激光科技有限公司 | Laser processing system and automatic focusing control method and system of laser processing equipment |
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Application publication date: 20200818 |