A laser cutting head with built-in nozzle temperature detection

Abstract

The present invention relates to the field of welding technology, and specifically to a laser cutting head with built-in nozzle temperature detection, comprising: a laser cutting head; a nozzle, the nozzle is detachably arranged at the cutting end of the laser cutting head; a first fixing frame, the first fixing frame is coaxially detachably arranged outside the cutting end of the laser cutting head and is arranged close to the nozzle; an air guide module, the air guide module is coaxially detachably arranged outside the first fixing frame, the air guide module is provided with an air guide part capable of outputting a normal temperature air source toward the cutting end of the laser cutting head and an air supply unit capable of supplying air to the air guide part; a protection module is coaxially arranged in the air outlet of the air guide part; a temperature detection module is fixedly arranged outside the air outlet of the air guide part in an inclined state; the present invention is not only not affected by smoke and high temperature, but also can perform comprehensive and real-time detection of the nozzle temperature, with high detection accuracy and good effect.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a laser cutting head with built-in nozzle temperature detection. Background Art

[0002] The laser cutting head is the core component of the laser cutting equipment, and its performance directly affects the cutting quality and equipment stability. During the high-power laser cutting process, local high temperatures will occur around the cutting head nozzle due to heat conduction and laser radiation. If the temperature cannot be monitored and controlled in real time, it may cause thermal expansion, oxidation wear or gas flow instability of the nozzle, thereby affecting the cutting accuracy, surface quality and equipment life. In traditional laser cutting equipment, the temperature detection module is usually arranged outside the cutting head, and the nozzle temperature is monitored by infrared sensors or thermocouples. However, this type of detection method has the following problems in practical applications:

[0003] 1. High-temperature smoke interference: The large amount of smoke and slag generated during the cutting process can easily interfere with the temperature detection signal and affect the detection accuracy.

[0004] 2. Obstruction of line of sight: Smoke particles and reflected light from the workpiece can obstruct the sensor’s line of sight, especially when cutting highly reflective materials, resulting in increased measurement errors.

[0005] 3. Insufficient response speed: The existing equipment has slow detection response and it is difficult to reflect the rapid changes in nozzle temperature in time. Delayed adjustment may cause unstable equipment operation.

[0006] 4. Influence of high-temperature airflow: Sparks or high-temperature smoke generated during the cutting process will damage the temperature detection equipment, thereby affecting the final detection data. Summary of the invention

[0007] In view of the above problems, a laser cutting head with built-in nozzle temperature detection is provided to solve the technical problems that the existing detection equipment is blocked by high temperature and smoke when detecting the nozzle temperature, resulting in poor detection accuracy and difficulty in detection.

[0008] To solve the problems of the prior art, the present invention provides a laser cutting head with built-in nozzle temperature detection, comprising: a laser cutting head; a nozzle, which is detachably arranged at the cutting end of the laser cutting head; a first fixing frame, which is coaxially detachably arranged outside the cutting end of the laser cutting head and is arranged close to the nozzle; an air guide module, which is coaxially detachably arranged outside the first fixing frame, and the air guide module is provided with an air guide portion capable of outputting a normal temperature air source toward the cutting end of the laser cutting head and an air supply unit capable of supplying air to the air guide portion; a protection module is coaxially arranged in the air outlet of the air guide portion; a temperature detection module is fixedly arranged outside the air outlet of the air guide portion in an inclined state, and the detection end of the temperature detection module is inclined toward the cutting end of the laser cutting head, the temperature detection module is provided with a temperature detection element capable of real-time detection of the nozzle, and a plurality of groups of temperature detection elements are circumferentially arranged along the axis of the air guide portion.

[0009] Preferably, the air guide portion is composed of an air storage bin, a conduction bin and a diffusion bin which are coaxially fixedly connected in sequence; the air storage bin is coaxially fixedly arranged outside the cutting end of the laser cutting head through a first fixing frame, and the outer wall of the air storage bin is also radially provided with an air inlet hole which is connected to the air outlet end of the air supply unit.

[0010] Preferably, the air supply unit includes an air supply pipeline capable of conducting the wind source toward the air inlet of the air guide part and an air supply connector capable of inputting the wind source into the air supply pipeline; a first air inlet connector capable of connecting to an external wind source is also vertically arranged on the side wall of the air supply connector; the air supply pipeline is arranged around the air storage bin and the air outlet end of the air supply pipeline is connected to the air inlet hole.

[0011] Preferably, a second air inlet connector capable of inputting a cooling air source into the air supply pipeline is vertically arranged on the outer wall of the air supply connector, and a solenoid valve is coaxially fixedly arranged outside the second air inlet connector.

[0012] Preferably, the temperature detection module includes a second fixing frame, a telescopic rod and a temperature detection element; the telescopic rod is fixedly arranged in an inclined state outside the air outlet of the air guide part by the second fixing frame, and the rod portion of the telescopic rod passes through the air guide part and is arranged toward the inside of the nozzle; the temperature detection element is coaxially fixedly arranged at the front end of the telescopic rod, and the detection end of the temperature detection element is arranged toward the nozzle.

[0013] Preferably, the protection module is provided with an isolation cover capable of isolating the nozzle from the temperature detection module; the isolation cover is coaxially arranged in the air guide portion and is arranged close to the air outlet of the air guide portion; the isolation cover is a hollow conical shell with openings at both ends, the inner wall of the isolation cover matches the outer wall of the nozzle, and an annular gap is formed between the nozzle and the isolation cover; the annular gap constitutes an air outlet channel, which is used for the air source to pass through.

[0014] Preferably, the protection module also includes a rotating unit, a cleaning unit and a driving unit capable of driving the isolation cover to rotate axially along the axis of the air guide part; the isolation cover is coaxially fixed in the air guide part through the rotating unit and is arranged close to the air outlet of the air guide part; the cleaning unit is fixed in an inclined state in the air outlet of the air guide part, and the cleaning end of the cleaning unit is arranged in contact with the side wall of the isolation cover; the driving unit is horizontally fixed in the air outlet of the air guide part through a third fixed frame, and the driving end of the driving unit is arranged horizontally toward the isolation cover.

[0015] Preferably, the isolation cover is made of high-temperature heat-resistant glass material.

[0016] Preferably, the cleaning unit consists of an internal cleaning element fixedly arranged in the air outlet of the air guide portion and an external cleaning element arranged outside the air outlet of the air guide portion relative to the internal cleaning element; the external cleaning element and the internal cleaning element have the same structure; the internal cleaning element consists of an elastic rod and a cleaning portion fixedly arranged at the front end of the elastic rod; the elastic rod is fixedly arranged in the air outlet of the air guide portion in an inclined state, and the front end of the elastic rod is inclined toward the isolation cover; the cleaning portion is fixedly arranged at the front end of the elastic rod and abuts against the side wall of the isolation cover.

[0017] Preferably, a retaining ring is coaxially threadedly connected to the lower end of the isolation cover.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention realizes how to monitor the nozzle temperature in real time and in all directions through a built-in temperature detection module; it avoids the defect in the prior art that external temperature detection cannot accurately capture nozzle temperature fluctuations, and significantly improves the accuracy and reliability of temperature detection.

[0020] 2. The present invention realizes how to effectively isolate the high-temperature airflow and smoke generated during the laser cutting process through the cooperation of the isolation cover and the air guide module, thereby preventing the high-temperature airflow and smoke from interfering with and damaging the temperature detection module; the temperature detection module can work stably in a high-temperature environment, avoiding the generation of temperature detection errors.

[0021] 3. The present invention uses a self-adjustable air supply unit to achieve the effect of immediately starting the cooling system to cool the nozzle when abnormal nozzle temperature is detected, thereby avoiding overheating and damage to the nozzle; this self-adjusting cooling mechanism is more efficient than manual intervention in traditional technologies and can respond to temperature changes more quickly, thereby better protecting the laser cutting head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a stereoscopic diagram of a laser cutting head with built-in nozzle temperature detection according to the present invention.

[0023] Figure 2 It is a side view of a laser cutting head with built-in nozzle temperature detection according to the present invention.

[0024] Figure 3 The present invention Figure 2 Cross-sectional view at AA.

[0025] Figure 4 The present invention Figure 3 A partial enlarged view of point B.

[0026] Figure 5 It is a top view of a laser cutting head with built-in nozzle temperature detection of the present invention without the laser cutting head.

[0027] Figure 6 The present invention Figure 5 Stereoscopic cross-sectional view of the CC section.

[0028] Figure 7 It is a stereoscopic diagram of a laser cutting head with built-in nozzle temperature detection of the present invention without the laser cutting head.

[0029] Figure 8 The present invention Figure 7 A partial enlarged view of point D.

[0030] Fig. 9 The present invention is a laser cutting head with built-in nozzle temperature detection, in which the laser cutting head is removed. Figure 1 .

[0031] Fig.10 The present invention is a laser cutting head with built-in nozzle temperature detection, in which the laser cutting head is removed. Figure 2 .

[0032] The numbers in the figure are:

[0033] 1. Laser cutting head; 11. Nozzle;

[0034] 2. The first fixed frame;

[0035] 3. Air guide module; 31. Air guide part; 311. Air storage bin; 3111. Air inlet; 312. Conducting bin; 313. Diffusion bin; 32. Air supply unit; 321. Air supply pipeline; 3211. Main air supply pipe; 3212. First auxiliary air supply pipe; 3213. Second auxiliary air supply pipe; 322. Air supply connector; 3221. First air inlet connector; 3222. Second air inlet connector; 3223. Solenoid valve;

[0036] 4. Protection module; 41. Isolation cover; 42. Rotating unit; 421. Fixed ring; 422. Rotating ring; 43. Cleaning unit; 431. Internal cleaning element; 432. External cleaning element; 433. Elastic rod; 434. Cleaning unit; 44. Driving unit; 441. Output air nozzle; 442. Blocking piece; 45. Third fixing frame; 46. Blocking ring;

[0037] 5. Temperature detection module; 51. Second fixing frame; 52. Telescopic rod; 53. Temperature detection element. DETAILED DESCRIPTION

[0038] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] See also Figures 1 to 10 As shown: A laser cutting head with built-in nozzle temperature detection, comprising: a laser cutting head 1; a nozzle 11, the nozzle 11 is detachably arranged at the cutting end of the laser cutting head 1; a first fixing frame 2, the first fixing frame 2 is coaxially detachably arranged outside the cutting end of the laser cutting head 1 and is arranged close to the nozzle 11; an air guide module 3, the air guide module 3 is coaxially detachably arranged outside the first fixing frame 2, the air guide module 3 is provided with an air guide portion 31 capable of outputting a normal temperature air source toward the cutting end of the laser cutting head 1 and an air supply unit 32 capable of supplying air to the air guide portion 31; a protection module 4 is coaxially arranged in the air outlet of the air guide portion 31; a temperature detection module 5 is fixedly arranged outside the air outlet of the air guide portion 31 in an inclined state, and the detection end of the temperature detection module 5 is inclined toward the cutting end of the laser cutting head 1, the temperature detection module 5 is provided with a temperature detection element 53 capable of real-time detection of the nozzle 11, and a plurality of groups of the temperature detection elements 53 are circumferentially arranged along the axis of the air guide portion 31.

[0040] When the material needs to be cut by the laser cutting head 1, the air guide module 3 and the temperature detection module 5 are first coaxially installed on the cutting end of the laser cutting head 1 using the first fixing frame 2, and it is ensured that the front end of the temperature detection module 5 is slightly lower than the nozzle 11 of the laser cutting head 1, so as to facilitate direct monitoring of the working temperature of the nozzle 11. During the operation of the laser cutting head 1, the air guide module 3 starts to work, and continuously outputs a stable wind source to the direction of the nozzle 11 through the air guide part 31 to form an airflow barrier. The airflow barrier can effectively dissipate the high-temperature smoke and sparks generated during the laser cutting process, so that the high-temperature smoke and sparks are radially dispersed along the surface of the material, and prevent the sparks or smoke from reversely affecting the normal operation of the temperature detection module 5 and the nozzle 11.

[0041] At the same time, the temperature detection module 5 monitors the temperature state of the nozzle 11 in real time to ensure a stable working environment. When the temperature detection module 5 detects that the temperature of the nozzle 11 rises abnormally, it will trigger an alarm signal through the internal sensor to remind the operator to take measures to reduce the temperature or suspend the operation to prevent the risk of equipment damage or reduced cutting quality caused by excessive temperature; the protection module 4 is used to prevent the high-temperature smoke or heat energy generated by the nozzle 11 from being transmitted to the detection end of the temperature detection module 5 when the temperature is abnormal, causing damage to the detection end of the temperature detection module 5, thereby affecting the real-time detection data.

[0042] Through the airflow barrier function of the air guide module 3, the interference of smoke and sparks on the temperature detection module 5 and the nozzle 11 during the laser cutting process is effectively avoided, thereby ensuring the accuracy of the detection data; at the same time, the real-time monitoring and abnormal alarm functions of the temperature detection module 5 can respond quickly when the nozzle 11 is overheated, thereby reducing the risk of equipment failure and improving the operating stability of the laser cutting head 1 and the accuracy and efficiency of material cutting.

[0043] See also Fig. 9 As shown: the air guide part 31 is composed of an air storage bin 311, a conduction bin 312 and a diffusion bin 313 which are coaxially fixedly connected in sequence; the air storage bin 311 is coaxially fixedly arranged outside the cutting end of the laser cutting head 1 through a first fixing frame 2, and the outer wall of the air storage bin 311 is also radially provided with an air inlet hole 3111 which is connected to the air outlet end of the air supply unit 32.

[0044] The gas storage bin 311, the conduction bin 312 and the diffusion bin 313 are all hollow conical shells with two ends open. The tip of the gas storage bin 311, i.e., the end with a small diameter, is fixedly connected to the wide end of the conduction bin 312, i.e., the end with a large diameter, and the tip of the conduction bin 312 is fixedly connected to the tip of the diffusion bin 313.

[0045] The gas storage bin 311 and the conduction bin 312 are used to guide the external air source to enter, and guide the wind source to pass through the laser cutting head 1 and the nozzle 11 in sequence, ensuring that the airflow is smoothly supplied to the nozzle 11. The diffusion bin 313 adjusts the flow direction of the wind source to cause the airflow to form a uniform circular wind curtain around the nozzle 11, effectively blocking the smoke and welding sparks generated by the laser cutting process. The diffusion bin 313 is set up to not only optimize the flow of the wind source and improve the uniformity of the airflow distribution, but also effectively prevent the damage of heat and smoke to the nozzle 11, ensuring the stable operation of the nozzle 11.

[0046] The structure of the gas storage bin 311, the conduction bin 312 and the diffusion bin 313 ensures that the wind source can be effectively guided and diffused, forming a protective wind curtain to block the influence of smoke and sparks on the laser cutting head 1 and the nozzle 11, thereby improving the cutting stability and the service life of the nozzle 11. And because the gas storage bin 311, the conduction bin 312 and the diffusion bin 313 are all designed to wrap the laser cutting head 1 and the nozzle 11, the wind source continuously conducted through the wind guide 31 can further achieve a cooling effect on the laser cutting head 1 and the nozzle 11.

[0047] See also Figure 6 , Figure 7 and Fig.10 As shown: the air supply unit 32 includes an air supply pipeline 321 capable of conducting the wind source toward the air inlet of the air guide part 31 and an air supply connector 322 capable of inputting the wind source into the air supply pipeline 321; the side wall of the air supply connector 322 is also vertically provided with a first air inlet connector 3221 capable of communicating with an external wind source; the air supply pipeline 321 is arranged around the air storage bin 311 and the air outlet end of the air supply pipeline 321 is communicated with the air inlet hole 3111.

[0048] The air supply pipeline 321 is composed of a main air supply pipe 3211, a first auxiliary air supply pipe 3212 and a second auxiliary air supply pipe 3213; the air supply joint 322 is coaxially fixedly arranged outside the main air supply pipe 3211 and is connected to the main air supply pipe 3211, the first auxiliary air supply pipe 3212 and the second auxiliary air supply pipe 3213 are respectively coaxially fixedly arranged at both ends of the main air supply pipe 3211, and the first auxiliary air supply pipe 3212 and the second auxiliary air supply pipe 3213 are respectively connected to the air inlet hole 3111 opened through the outer wall of the air storage bin 311.

[0049] When it is necessary to input air source into the air guide portion 31, the first air inlet connector 3221 is first connected to the external air source. At this time, the external air source enters through the main air supply pipe 3211, and is divided into the first auxiliary air supply pipe 3212 and the second auxiliary air supply pipe 3213, and the air source is synchronously transported to the air guide portion 31 through the first auxiliary air supply pipe 3212 and the second auxiliary air supply pipe 3213.

[0050] Through the diversion configuration of the main air supply pipe 3211 and the auxiliary air supply pipe, efficient air supply to the air guide part 31 is achieved, avoiding the problems of unstable air pressure or insufficient air volume that may be caused by a single air supply path; at the same time, through the coordinated air supply of multiple pipes, the uniformity and accuracy of wind source conduction are improved, ensuring the stability of the airflow output of the air guide part 31.

[0051] See also Fig.10As shown: the outer wall of the air supply connector 322 is also vertically provided with a second air inlet connector 3222 capable of inputting a cooling air source into the air supply pipeline 321, and a solenoid valve 3223 is also coaxially fixedly provided outside the second air inlet connector 3222.

[0052] The second air inlet connector 3222 is used to be connected to an external cooling air source such as liquid nitrogen. When the laser cutting head 1 is continuously cutting the material, the temperature detection module 5 detects the temperature change around the nozzle 11 in real time. When it is detected that the temperature on one side of the nozzle 11 is abnormally increased, in order to avoid further damage to the nozzle 11 due to the continuous high temperature, the cutting work is stopped and the air supply from the first air inlet connector 3221 to the air guide part 31 is stopped; then the solenoid valve 3223 is driven to operate, the internal cooling transmission channel of the second air inlet connector 3222 is opened, and the external cooling air source is started to input the cooling air source into the second air inlet connector 3222. After the cooling air source enters through the second air inlet connector 3222, it passes through the air supply pipeline 321 and the air guide part 31 in turn, and finally acts on the outer surface of the nozzle 11, thereby achieving a local cooling effect on the nozzle 11, thereby preventing the high temperature from further spreading and causing damage to the equipment.

[0053] By designing an independent cooling air source input channel and cooperating with the real-time monitoring function of the temperature detection module 5, the effect of quickly switching to the cooling mode when the temperature of the nozzle 11 rises abnormally is achieved. The use of a cooling air source such as liquid nitrogen can not only effectively reduce the surface temperature of the nozzle 11 and prevent structural damage caused by high temperature, but also ensure the safety and stability of the cutting equipment and extend the service life of the equipment.

[0054] See also Figure 8 and Fig. 9 As shown: the temperature detection module 5 includes a second fixing frame 51, a telescopic rod 52 and a temperature detection element 53; the telescopic rod 52 is fixedly arranged outside the air outlet of the air guide portion 31 in an inclined state through the second fixing frame 51, and the rod portion of the telescopic rod 52 passes through the air guide portion 31 and is arranged toward the nozzle 11; the temperature detection element 53 is coaxially fixedly arranged at the front end of the telescopic rod 52, and the detection end of the temperature detection element 53 is arranged toward the nozzle 11.

[0055] The temperature detection element 53 is specifically an infrared sensor.

[0056] Since the temperature detection modules 5 are evenly arranged in multiple groups along the axis of the air guide portion 31, all-round temperature detection of the nozzle 11 can be achieved. When the number of temperature detection modules 5 increases, the coverage area and detection accuracy thereof are also improved accordingly.

[0057] When the laser cutting head 1 cuts the material, the multiple groups of temperature detection modules 5 act synchronously. The detection end of each group of temperature detection modules 5 continuously emits detection rays toward the side wall of the nozzle 11, thereby realizing real-time monitoring of the temperature of the nozzle 11. When the temperature detected by any group of temperature detection modules 5 exceeds the preset threshold, the temperature detection module 5 will promptly feed back the abnormal signal to the control center, trigger the alarm system, and stop the operation of the laser cutting head 1, thereby avoiding damage to the equipment due to high temperature or abnormal operation.

[0058] By setting up multiple sets of temperature detection modules 5, it is possible to achieve all-round and real-time temperature detection of the nozzle 11, significantly improving the coverage and accuracy of monitoring. In the case of abnormal high temperature, the system can respond quickly, alarm in time and stop the operation. At the same time, the distributed detection design further reduces the hidden dangers caused by single-point monitoring failure, ensuring the stability and reliability of the cutting process.

[0059] See also Fig.10 As shown: the protection module 4 is provided with an isolation cover 41 capable of isolating the nozzle 11 from the temperature detection module 5; the isolation cover 41 is coaxially arranged in the air guide portion 31 and is arranged near the air outlet of the air guide portion 31; the isolation cover 41 is a hollow conical shell with openings at both ends, the inner wall of the isolation cover 41 matches the outer wall of the nozzle 11, and an annular gap is formed between the nozzle 11 and the isolation cover 41; the annular gap constitutes an air outlet channel, and the air outlet channel is used for the air source to pass through.

[0060] When the laser cutting head 1 is cutting the material, in order to prevent the high-temperature airflow or smoke generated by the nozzle 11 when it is damaged or fails from directly acting on the detection end of the temperature detection module 5, resulting in damage to the temperature detection module 5, the isolation cover 41 can effectively isolate the high-temperature airflow and smoke generated by the nozzle 11 due to damage from the detection end of the temperature detection module 5, thereby avoiding the direct impact of the high-temperature airflow or smoke on the detection end. Ensure that the temperature detection module 5 can operate stably during the cutting process.

[0061] See also Figure 7 , Figure 8 and Fig.10As shown: the protection module 4 also includes a rotating unit 42, a cleaning unit 43 and a driving unit 44 capable of driving the isolation cover 41 to rotate axially along the axis of the air guide portion 31; the isolation cover 41 is coaxially fixedly arranged in the air guide portion 31 through the rotating unit 42 and is arranged near the air outlet of the air guide portion 31; the cleaning unit 43 is fixedly arranged in the air outlet of the air guide portion 31 in an inclined state, and the cleaning end of the cleaning unit 43 is arranged in contact with the side wall of the isolation cover 41; the driving unit 44 is horizontally fixedly arranged in the air outlet of the air guide portion 31 through a third fixing frame 45, and the driving end of the driving unit 44 is horizontally arranged toward the isolation cover 41.

[0062] The driving unit 44 is composed of an output air nozzle 441 capable of continuously outputting an air source toward the air guide part 31, and a baffle 442 obliquely fixedly arranged on the side wall of the isolation cover 41; the baffle 442 is circumferentially arranged in multiple groups along the axis of the isolation cover 41; the output air nozzle 441 is horizontally fixedly arranged in the air outlet of the air guide part 31 through a third fixing frame 45, and the output end of the output air nozzle 441 is obliquely arranged toward the baffle 442.

[0063] When it is necessary to drive the isolation cover 41 to rotate and cooperate with the cleaning unit 43 to continuously clean the outer wall of the isolation cover 41, firstly connect the external air source and drive the output air nozzle 441 to operate, and continuously output the air source toward the baffle 442 obliquely installed on the outer wall of the isolation cover 41. The air source causes the isolation cover 41 to continuously rotate along the axis of the air guide portion 31 by the thrust acting on the baffle 442. At this time, the isolation cover 41 maintains continuous friction with the cleaning portion 434 during the rotation process, thereby effectively removing dust and foreign matter on the outer wall of the isolation cover 41, realizing automatic cleaning of the isolation cover 41, and ensuring that the temperature detection module 5 is not disturbed in any way.

[0064] By utilizing the wind source to drive the isolation cover 41 to rotate and cooperating with the cleaning unit 43 to achieve automatic cleaning, frequent manual cleaning is avoided, which not only ensures that the surface of the isolation cover 41 is always kept clean, but also ensures accurate detection of the temperature detection module 5.

[0065] By installing the isolation cover 41 with the rotating unit 42, the isolation cover 41 is provided with axial freedom, so that the isolation cover 41 can rotate circumferentially along the axis of the air guide portion 31. The rotating unit 42 is composed of a fixed ring 421 coaxially fixedly arranged at the connection between the conduction chamber 312 and the diffusion chamber 313 and a rotating ring 422 rotatably arranged below the fixed ring 421, and the isolation cover 41 is coaxially fixed below the rotating ring 422.

[0066] When it is necessary to clean the isolation cover 41 to ensure that it is always clean so as not to affect the normal detection of the nozzle 11 by the temperature detection module 5, it is only necessary to drive the isolation cover 41 to rotate through the driving unit 44. At this time, the isolation cover 41 and the cleaning end of the cleaning module will continue to rub, thereby achieving continuous cleaning of the surface of the isolation cover 41, ensuring that the isolation cover 41 is always in a clean and dirt-free state, and effectively preventing dust or stains from affecting the temperature detection accuracy.

[0067] The rotation unit 42 provides the isolation cover 41 with a rotation function, so that the isolation cover 41 can rotate freely during the cleaning process and effectively contact with the cleaning module, ensuring that the surface of the isolation cover 41 is kept clean and preventing stains from interfering with or damaging the temperature detection module 5.

[0068] See also Fig.10 As shown: the isolation cover 41 is made of high temperature heat-resistant glass material.

[0069] The isolation cover 41 is made of high-temperature heat-resistant glass, which is mainly used to effectively isolate the nozzle 11 from the surrounding high-temperature airflow and smoke during the laser cutting process. The high-temperature heat-resistant glass can prevent the high-temperature airflow and smoke from directly contacting the temperature detection module 5 when the nozzle 11 is damaged, thereby avoiding interference of the high-temperature airflow and smoke on the temperature detection module 5, and ensuring that the temperature detection module 5 can continuously and accurately detect the temperature of the nozzle 11 in real time.

[0070] Since the high temperature heat-resistant glass has good transparency, the temperature detection module 5 can accurately monitor without obstruction, and has excellent high temperature resistance, and can effectively withstand the high temperature environment generated during the laser cutting process. This ensures the high temperature isolation of the nozzle 11 and the normal operation of the temperature detection module 5, avoiding the risk of temperature detection failure and equipment damage.

[0071] See also Figure 4 and Figure 6 As shown: the cleaning unit 43 is composed of an inner cleaning element 431 fixedly arranged in the air outlet of the air guide portion 31 and an outer cleaning element 432 arranged outside the air outlet of the air guide portion 31 relative to the inner cleaning element 431; the outer cleaning element 432 and the inner cleaning element 431 have the same structure; the inner cleaning element 431 is composed of an elastic rod 433 and a cleaning portion 434 fixedly arranged at the front end of the elastic rod 433; the elastic rod 433 is fixedly arranged in the air outlet of the air guide portion 31 in an inclined state, and the front end of the elastic rod 433 is inclined toward the isolation cover 41; the cleaning portion 434 is fixedly arranged at the front end of the elastic rod 433 and abuts against the side wall of the isolation cover 41.

[0072] The elastic rod 433 is arranged in an inclined manner and has an elastic force that continuously tilts toward the isolation cover 41. The cleaning portion 434 is fixedly arranged at the front end of the elastic rod 433. With the elastic force of the elastic rod 433, the cleaning portion 434 can always keep in continuous contact with the side wall of the isolation cover 41. When the isolation cover 41 rotates under the drive of the driving unit 44, the rotating isolation cover 41 will continue to rub against the cleaning portion 434, thereby effectively erasing dust and foreign matter on the surface of the isolation cover 41. It is ensured that the surface of the isolation cover 41 is always kept clean, avoiding the accumulation of dust and stains, and thus avoiding affecting the real-time detection of the temperature detection module 5.

[0073] By using the tilted elastic rod 433 and the cleaning part 434, the function of continuously cleaning the surface of the isolation cover 41 in real time is achieved, ensuring that the isolation cover 41 will not affect the accuracy of the temperature detection module 5 due to stains during the laser cutting process.

[0074] See also Figure 7 As shown, a retaining ring 46 is coaxially threadedly connected to the lower end of the isolation cover 41 .

[0075] The baffle ring 46 is used to effectively prevent the sparks and smoke generated during the welding process from rebounding to the isolation cover 41. When the welding head performs laser cutting or welding, a large amount of high-temperature sparks and smoke will be generated, and these high-temperature substances may have adverse effects on the surface of the isolation cover 41 and the temperature detection module 5. The baffle ring 46 can effectively prevent the sparks and smoke from rebounding to the outer wall of the isolation cover 41, thereby protecting the isolation cover 41 and the temperature detection module 5, ensuring the normal operation of the temperature detection module 5, and avoiding the error of temperature detection caused by the interference of smoke or sparks.

[0076] The present invention is not only not affected by smoke and high temperature but also can perform comprehensive and real-time detection of the nozzle temperature with high detection accuracy and good effect.

[0077] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A laser cutting head with built-in nozzle temperature detection, characterized in that: include: Laser cutting head (1); A nozzle (11), the nozzle (11) being detachably arranged at the cutting end of the laser cutting head (1); A first fixing frame (2), the first fixing frame (2) being coaxially and detachably arranged outside the cutting end of the laser cutting head (1) and close to the nozzle (11); An air guide module (3), the air guide module (3) being coaxially detachably arranged outside the first fixing frame (2), the air guide module (3) being provided with an air guide portion (31) capable of outputting a normal temperature air source toward a cutting end of the laser cutting head (1), and an air supply unit (32) capable of supplying air to the air guide portion (31); The protection module (4) is coaxially arranged in the air outlet of the air guide portion (31); The temperature detection module (5) is fixedly arranged outside the air outlet of the air guide portion (31) in an inclined state, and the detection end of the temperature detection module (5) is arranged inclined toward the cutting end of the laser cutting head (1), the temperature detection module (5) is provided with a temperature detection element (53) capable of real-time detection of the nozzle (11), and a plurality of groups of the temperature detection elements (53) are arranged circumferentially along the axis of the air guide portion (31); The protection module (4) is provided with an isolation cover (41) capable of isolating the nozzle (11) from the temperature detection module (5); The isolation cover (41) is coaxially arranged in the air guide portion (31) and is arranged near the air outlet of the air guide portion (31); the isolation cover (41) is a conical shell that is hollow and open at both ends; the inner wall of the isolation cover (41) matches the outer wall of the nozzle (11), and an annular gap is formed between the nozzle (11) and the isolation cover (41); the annular gap constitutes an air outlet channel, and the air outlet channel is used for the air source to pass through; The protection module (4) further comprises a rotating unit (42), a cleaning unit (43), and a driving unit (44) capable of driving the isolation cover (41) to rotate axially along the axis of the air guide portion (31); The isolation cover (41) is coaxially fixedly disposed in the air guide portion (31) through a rotating unit (42) and is disposed close to an air outlet of the air guide portion (31); The cleaning unit (43) is fixedly arranged in an inclined state in the air outlet of the air guide portion (31), and the cleaning end of the cleaning unit (43) is arranged to abut against the side wall of the isolation cover (41); The drive unit (44) is horizontally fixedly disposed in the air outlet of the air guide portion (31) via a third fixing frame (45), and the drive end of the drive unit (44) is horizontally disposed toward the isolation cover (41); The isolation cover (41) is made of high temperature heat-resistant glass material; The protection module (4) comprises a rotating unit (42), and the isolation cover (41) is coaxially fixedly arranged in the air guide portion (31) and arranged close to the air outlet of the air guide portion (31) through the rotating unit (42); by using the rotating unit (42) to install the isolation cover (41), an axial degree of freedom is provided for the isolation cover (41), so that the isolation cover (41) can rotate circumferentially along the axis of the air guide portion (31).

2. A laser cutting head with built-in nozzle temperature detection according to claim 1, characterized in that: The air guide portion (31) is composed of an air storage bin (311), a conduction bin (312), and a diffusion bin (313) which are coaxially fixedly connected in sequence; the air storage bin (311) is coaxially fixedly arranged outside the cutting end of the laser cutting head (1) via a first fixing frame (2), and an air inlet hole (3111) which is in communication with an air outlet end of the air supply unit (32) is radially opened on the outer wall of the air storage bin (311).

3. A laser cutting head with built-in nozzle temperature detection according to claim 2, characterized in that: The air supply unit (32) comprises an air supply pipeline (321) capable of conducting an air source toward an air inlet of the air guide portion (31), and an air supply connector (322) capable of inputting an air source into the air supply pipeline (321); A first air inlet connector (3221) capable of communicating with an external air source is also vertically disposed on the side wall of the air supply connector (322); The air supply pipeline (321) is arranged around the air storage bin (311), and the air outlet end of the air supply pipeline (321) is in communication with the air inlet hole (3111).

4. A laser cutting head with built-in nozzle temperature detection according to claim 3, characterized in that: A second air inlet connector (3222) capable of inputting a cooling air source into the air supply pipeline (321) is also vertically disposed on the outer wall of the air supply connector (322), and a solenoid valve (3223) is also coaxially fixedly disposed outside the second air inlet connector (3222).

5. The laser cutting head with built-in nozzle temperature detection according to claim 1, characterized in that: The temperature detection module (5) comprises a second fixing frame (51), a telescopic rod (52) and a temperature detection element (53); The telescopic rod (52) is fixedly arranged outside the air outlet of the air guide portion (31) in an inclined state via the second fixing frame (51), and the rod portion of the telescopic rod (52) passes through the air guide portion (31) and is arranged toward the inside of the nozzle (11); The temperature detection element (53) is coaxially fixedly arranged at the front end of the telescopic rod (52), and the detection end of the temperature detection element (53) is arranged toward the nozzle (11).

6. The laser cutting head with built-in nozzle temperature detection according to claim 1, characterized in that: The cleaning unit (43) is composed of an internal cleaning element (431) fixedly arranged in the air outlet of the air guide portion (31), and an external cleaning element (432) arranged outside the air outlet of the air guide portion (31) relative to the internal cleaning element (431); The outer cleaning element (432) and the inner cleaning element (431) have the same structure; The inner cleaning element (431) is composed of an elastic rod (433) and a cleaning portion (434) fixedly arranged at the front end of the elastic rod (433); The elastic rod (433) is fixedly arranged in an inclined state in the air outlet of the air guide portion (31), and the front end of the elastic rod (433) is arranged inclined toward the isolation cover (41); The cleaning portion (434) is fixedly disposed at the front end of the elastic rod (433) and abuts against the side wall of the isolation cover (41).

7. The laser cutting head with built-in nozzle temperature detection according to claim 1, characterized in that: A retaining ring (46) is coaxially threadedly connected to the lower end of the isolation cover (41).

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