Safety protection system of handheld laser processing head

Abstract

The utility model discloses a safety protection system of a handheld laser processing head, the safety protection system is arranged in laser processing equipment, the safety protection system comprises a detection module, the detection module is arranged in a main body and faces a lens, the detection module comprises a light intensity detector and a temperature detector, the light intensity detector is used for detecting the light intensity of the lens, and the temperature detector is used for detecting the temperature of the lens; the temperature detector is used for detecting the temperature of the lens; the alarm module is electrically connected with the detection module; and the processor is electrically connected with the detection module and the alarm module. According to the safety protection system of the handheld laser machining head, through the mode that the detection module is arranged in the laser machining equipment, real-time detection of the lens can be achieved, a user is reminded to replace the lens in time when the lens is polluted, and the situation that the welding quality and the service life are affected due to the fact that the lens is damaged is avoided.

Description

Technical Field

[0001] The present application relates to the field of laser processing equipment, and in particular to a safety protection system for a handheld laser processing head. Background Art

[0002] Handheld laser welder is a kind of high-efficiency and high-precision laser processing equipment, which uses laser as heat source and is operated by handheld mode. This welding method has many advantages, such as small heat-affected zone, small deformation, fast welding speed and high weld quality.

[0003] The working principle of a handheld laser welder is to focus the laser beam on the surface of the workpiece, causing the surface of the workpiece to melt instantly to form a specific molten pool, thereby achieving material welding. However, during the welding process, the high-power density laser will evaporate the material and form small holes on the material while irradiating and melting the material. The evaporation of the material will form a large amount of spatter. The spatter will enter from the light outlet of the welding gun, contaminate the inside of the welding gun, and damage the galvanometer, focusing mirror, etc. inside the welding gun, which will have a negative impact on the accuracy and service life of the welding machine.

[0004] Although a protective mirror is provided in front of the focusing mirror in the prior art to intercept spatter, damage to the protective mirror will affect the light output and reduce the light output intensity, thereby causing the welding wire to be unable to penetrate, affecting the welding effect and reducing the welding efficiency. Utility Model Content

[0005] The present application mainly provides a safety protection system for a handheld laser processing head to solve the problem of damage to the lens caused by splashes during the use of laser processing equipment in the prior art.

[0006] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a safety protection system for a handheld laser processing head, which is arranged in a laser processing device, wherein the laser processing device comprises a main body and a lens, wherein the lens is embedded in the main body, and comprises:

[0007] A detection module, disposed in the main body and facing the lens, the detection module comprising a light intensity detector and a temperature detector, the light intensity detector is used to detect the light intensity at the lens, and the temperature detector is used to detect the temperature at the lens;

[0008] An alarm module, electrically connected to the detection module;

[0009] A processor is electrically connected to the detection module and the alarm module, and the processor is used to compare the light intensity detected by the light intensity detector with a light intensity threshold and obtain a first result, and to compare the temperature detected by the temperature detector with a temperature threshold and obtain a second result, and to issue instructions to the alarm module based on the first result and the second result in turn, and the alarm module issues an alarm prompt based on the instructions.

[0010] In a possible implementation, the lens includes a protective lens and a focusing lens which are arranged in sequence, and the detection module detects the protective lens and the focusing lens respectively.

[0011] In a possible implementation, the processor is configured to send an instruction to the alarm module when the detection result of the protection lens or the focusing lens exceeds a threshold.

[0012] In a possible implementation, the laser processing equipment further includes a light source module, the processor is electrically connected to the light source module, and the processor is configured to control the light source module based on the first result and the second result.

[0013] In a possible implementation, the laser processing equipment further includes a mounting frame, the lens is embedded in the mounting frame, the main body is provided with a card slot, and the mounting frame can be disassembled and assembled in the card slot in a drawer-like manner.

[0014] In a possible implementation, a pull-out detector is further included, the pull-out detector includes a transmitting end and a receiving end, the transmitting end is arranged on the mounting frame, the receiving end is arranged on the main body and opposite to the transmitting end, and the pull-out detector is used to detect the plugging and unplugging of the mounting frame.

[0015] In a possible implementation manner, the transmitting end and the receiving end are magnetic elements.

[0016] In a possible implementation, the transmitting end is a light-emitting element, and the receiving end is a photosensitive element.

[0017] In a possible implementation, the unplug detector is electrically connected to the alarm module, and the unplug detector is used to detect the plugging and unplugging of the mounting bracket. In a possible implementation, the unplug detector is electrically connected to the processor, and the processor is configured to issue an instruction to the alarm module when the unplug detector detects that the mounting bracket is unplugged, and the alarm module issues an alarm indication based on the instruction.

[0018] The beneficial effect of the present application is that, different from the prior art, the present application discloses a safety protection system for a handheld laser processing head, which detects the light intensity and temperature of the lens, determines the dirtiness of the lens, and promptly alarms and reminds the user to avoid damaging the lens and improve the service life and accuracy of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 This is a functional module diagram of a safety protection system for a handheld laser processing head in one embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of the disassembled structure of the laser processing equipment in one embodiment of the present application.

[0022] Description of main component symbols:

[0023] 100-laser processing equipment; 10-main body; 11-detection module; 20-focusing mirror; 30-protection mirror; 40-mounting frame; 41-pull-out detector; 50-card slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] See also Figure 1 The present application proposes a safety protection system for a handheld laser processing head, which is arranged in a laser processing device 100. The laser processing device 100 includes a main body 10 and a lens, and the lens is embedded in the main body 10. The safety protection system for a handheld laser processing head includes:

[0028] The detection module 11 is disposed in the main body 10 and is arranged toward the lens. The detection module 11 includes a light intensity detector and a temperature detector. The light intensity detector is used to detect the light intensity at the lens, and the temperature detector is used to detect the temperature at the lens.

[0029] Alarm module, electrical connection detection module 11.

[0030] The processor is electrically connected to the detection module 11 and the alarm module. The processor is used to compare the light intensity detected by the light intensity detector with the light intensity threshold and obtain a first result, and to compare the temperature detected by the temperature detector with the temperature threshold and obtain a second result, and to issue instructions to the alarm module based on the first result and the second result in turn, and the alarm module issues an alarm prompt based on the instructions.

[0031] Specifically, the light intensity detector and the temperature detector are arranged beside the optical channel inside the laser processing equipment 100 and are arranged toward the lens, and are used to detect the light intensity and temperature at the lens position respectively. The processor receives the detection results and determines whether the lens is contaminated by welding spatter according to the changes in light intensity and temperature at the lens. When the light intensity decreases to below the threshold or the temperature is above the threshold, it can be considered that the lens is highly contaminated. At this time, the processor compares the first result or the second result and sends a command to the alarm module, so that the alarm module sends an alarm prompt to the user to stop welding in time to prevent the lens from being further contaminated and damaged by spatter.

[0032] In this embodiment, the light intensity detector and temperature detector in the detection module 11 convert the detection parameters into electrical signals and send them to the processor. The processor is preset with temperature and light intensity thresholds, and the light intensity in the detection result is compared with the light intensity threshold, and the temperature in the detection result is compared with the temperature threshold. The processor is also preset with a sequential judgment logic, first comparing the light intensity, and then comparing the temperature. When any comparison result exceeds the threshold, it can be considered that the lens is highly dirty and the lens is at risk of damage, and the alarm mechanism can be triggered.

[0033] The alarm module is electrically connected to the processor, and a specific type of alarm device can be set according to actual needs to issue corresponding alarm prompts, including but not limited to sound, light, signal prompts, etc.

[0034] In this way, the lens can be detected and protected in real time, so as to avoid serious damage to the lens caused by splashes, thereby ensuring the service life and welding effect of the laser processing equipment 100.

[0035] In one embodiment, the lens includes a protective lens 30 and a focusing lens 20 which are sequentially arranged, and the detection module detects the protective lens 30 and the focusing lens 20 respectively.

[0036] In this embodiment, the lens of the laser processing equipment 100 includes a focusing lens 20 and a protective lens 30. The focusing lens 20 is used to focus the welding light path and provide the high temperature required for welding. Because it is close to the welding place, in order to protect the focusing lens 20, a protective lens 30 is set behind the focusing lens 20 to protect the focusing lens 20. However, the focusing lens 20 will also affect the light path due to the contamination of splashes. Therefore, in this embodiment, a detection module 11 is provided for both the focusing lens 20 and the protective lens 30. When any lens is contaminated and the detection result exceeds the threshold, an alarm will be issued, and according to the connection relationship of each component, it is selected whether to directly turn off the light source and stop welding to protect the lens. In addition, the protective lens 30 and the focusing lens 20 will also be contaminated with dust due to static electricity and other reasons, resulting in a decrease in light intensity after the light path passes through. Therefore, the detection module 11 can also detect this situation, thereby reminding the user to clean it in time to ensure the use effect of the laser processing equipment 100.

[0037] In one embodiment, the processor is configured to send a command to the alarm module when the detection result of the protective lens 30 or the focusing lens 20 exceeds a threshold value. The detection module 11 detects the protective lens 30 and the focusing lens 20 at the same time and sends the result to the processor. The processor compares the detection results of the protective lens 30 and the focusing lens 20 at the same time. When the detection result of any lens exceeds the threshold value, the alarm mechanism will be triggered, and the processor sends a command to the alarm module.

[0038] In one embodiment, the laser processing equipment 100 further includes a light source module, the processor is electrically connected to the light source module, and the processor is configured to control the light source module based on the first result and the second result.

[0039] Specifically, the processor can be electrically connected to the light source module of the laser processing equipment 100. When it is detected that the light intensity at the lens is lower than the light intensity threshold or the temperature exceeds the temperature threshold, the detection module 11 can send an instruction to the light source to turn off the light source module and stop the welding of the laser processing equipment 100, thereby protecting the lens.

[0040] See also Figure 2 In one embodiment, the laser processing device 100 further includes a mounting frame 40, in which the lens is embedded, and the main body 10 is provided with a card slot 50, and the mounting frame 40 can be disassembled and installed in the card slot 50 in a drawer-like manner. The mounting frame 40 can be taken out by pulling, and the lens can be disassembled and installed by inserting. On the basis of the drawer-type installation, fasteners can also be provided to further enhance the stability of the connection, thereby ensuring the stability of the welding optical path and the stability of the welding quality.

[0041] The drawer-type mounting frame 40 is convenient for the user to disassemble, assemble and replace the lens. The lens can be directly taken out by removing the fasteners. After replacing the lens, the mounting frame 40 can be directly inserted into the card slot 50 to realize quick replacement of the lens.

[0042] In one embodiment, a pull-out detector 41 is further included. The pull-out detector 41 includes a transmitter and a receiver. The transmitter is disposed on the mounting bracket 40 , and the receiver is disposed on the main body 10 and opposite to the transmitter. The pull-out detector 41 is used to detect the plugging and unplugging of the mounting bracket 40 .

[0043] The transmitting end and the receiving end of the extraction detector 41 can be interchanged. The transmitting end can continuously send signals to the receiving end, such as electrical signals, optical signals or magnetism, and the receiving end determines whether the mounting bracket 40 is in the insertion position according to the signals. If the receiving end cannot correctly receive the corresponding signal, it determines that the mounting bracket 40 is disassembled or shifted. At this time, the receiving end immediately sends a signal to turn off the welding light source and issue a warning to avoid moving the lens without turning off the light, which will cause the light path to deviate and cause danger to the user. In one embodiment, the transmitting end and the receiving end are magnetic elements, such as Hall effect sensors, which determine whether the mounting bracket 40 is shifted by measuring the magnetic change.

[0044] In one embodiment, the transmitting end is a light emitting element, and the receiving end is a light sensing element, and whether the mounting bracket 40 is displaced is determined by detecting the light signal.

[0045] In one embodiment, the unplugging detector 41 is electrically connected to the alarm module, and the unplugging detector 41 is used to detect the plugging and unplugging of the mounting bracket 40. When the unplugging detector 41 detects that the mounting bracket 40 is shifted, a signal is sent to the alarm module to issue an alarm prompt to remind the user to avoid the lens moving when the optical path is not broken and causing harm to the user.

[0046] In one embodiment, the unplugging detector 41 is electrically connected to the processor, and the processor is configured to send an instruction to the alarm module when the unplugging detector 41 detects that the mounting bracket 40 is unplugged. The alarm module sends an alarm indication based on the instruction. By setting the processor to detect and promptly handle the mounting bracket 40, the relevant handling logic is preset in the processor, which is convenient for adjusting and changing the system.

[0047] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A safety protection system for a handheld laser processing head, arranged in a laser processing device, wherein the laser processing device comprises a main body and a lens, wherein the lens is embedded in the main body, and wherein: include: A detection module is disposed in the main body and is disposed toward the lens, the detection module comprises a light intensity detector and a temperature detector, the light intensity detector is used to detect the light intensity at the lens, and the temperature detector is used to detect the temperature at the lens; An alarm module, electrically connected to the detection module; A processor is electrically connected to the detection module and the alarm module, and the processor is used to compare the light intensity detected by the light intensity detector with a light intensity threshold and obtain a first result, and to compare the temperature detected by the temperature detector with a temperature threshold and obtain a second result, and to issue instructions to the alarm module based on the first result and the second result in turn, and the alarm module issues an alarm prompt based on the instructions.

2. A safety protection system for a handheld laser processing head according to claim 1, characterized in that: The lens includes a protective lens and a focusing lens which are arranged in sequence, and the detection module detects the protective lens and the focusing lens in sequence respectively.

3. A safety protection system for a handheld laser processing head according to claim 2, characterized in that: The processor is configured to send an instruction to the alarm module when the detection result of the protection lens or the focusing lens exceeds a threshold.

4. A safety protection system for a handheld laser processing head according to claim 1, characterized in that: The laser processing equipment further includes a light source module. The processor is electrically connected to the light source module. The processor is configured to control the light source module based on the first result and the second result.

5. The safety protection system for a handheld laser processing head according to claim 1, characterized in that: The laser processing equipment also includes a mounting frame, the lens is embedded in the mounting frame, the main body is provided with a card slot, and the mounting frame can be disassembled and assembled in the card slot in a drawer-like manner.

6. A safety protection system for a handheld laser processing head according to claim 5, characterized in that: It also includes a pull-out detector, which includes a transmitting end and a receiving end. The transmitting end is arranged on the mounting frame, and the receiving end is arranged on the main body and opposite to the transmitting end. The pull-out detector is used to detect the plugging and unplugging of the mounting frame.

7. A safety protection system for a handheld laser processing head according to claim 6, characterized in that: The transmitting end and the receiving end are magnetic elements.

8. The safety protection system for a handheld laser processing head according to claim 6, characterized in that: The transmitting end is a light emitting element, and the receiving end is a light sensing element.

9. The safety protection system for a handheld laser processing head according to claim 6, characterized in that: The pull-out detector is electrically connected to the alarm module.

10. The safety protection system for a handheld laser processing head according to claim 6, characterized in that: The pull-out detector is electrically connected to the processor, and the processor is configured to send an instruction to the alarm module when the pull-out detector detects that the mounting bracket is pulled out, and the alarm module sends an alarm indication based on the instruction.

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