A fiber laser cutting head with built-in air leakage monitoring

Abstract

The present invention discloses a fiber laser cutting head with built-in air leakage monitoring, comprising a housing and a fiber connection seat, wherein the upper end of the housing is provided with a fiber connection seat, the lower end of the housing is provided with a detection mechanism, a positioning mechanism is arranged on the side of the detection mechanism, the positioning mechanism is interconnected with a cleaning mechanism, and the detection mechanism comprises a connection sleeve, a cavity, an air inlet interface, an air pressure sensor, a shunt, an air hole, a wind wheel, a mounting frame, an elastic strip and a bell. During the use of the device, when air leakage occurs inside the fiber laser cutting head with built-in air leakage monitoring, in conjunction with the action of the air pressure sensor, the air pressure change inside the cavity can be determined, thereby feeding back data to the control console to remind the staff, and in conjunction with the action of the shunt, the air hole, the wind wheel and the elastic strip, the bell can be made to sound when air leakage occurs, thereby realizing a sound alarm when the staff notices the alarm of the control console.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber laser cutting heads, and in particular to an optical fiber laser cutting head with built-in air leakage monitoring. Background Art

[0002] Laser cutting uses a high-power density focused laser beam to scan the surface of the material, heating the material to several thousand or even tens of thousands of degrees Celsius in a very short time, causing the material to melt or vaporize instantly, and then uses high-pressure gas to blow the melted or vaporized material away from the cut, thereby achieving the purpose of cutting the material;

[0003] During the use of the fiber laser cutting head, in order to better achieve the slag removal effect on the material cutting surface, it is necessary to inflate and use high-speed airflow to blow away the slag on the material cutting surface. However, during actual use, the existing fiber laser cutting head may have internal air leakage, and the staff cannot discover it in time. Insufficient air pressure leads to poor discharge effect of the slag on the cutting surface, thereby affecting the cutting quality of the material. Therefore, in response to the above problem, a fiber laser cutting head with built-in air leakage monitoring is designed to better meet actual use needs. Summary of the invention

[0004] The object of the present invention is to provide a fiber laser cutting head with built-in air leakage monitoring to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fiber laser cutting head with built-in air leakage monitoring, comprising a shell and a fiber connection seat, the upper end of the shell is equipped with a fiber connection seat, the lower end of the shell is equipped with a detection mechanism, the side of the detection mechanism is provided with a positioning mechanism, the positioning mechanism and the cleaning mechanism are interconnected, the detection mechanism comprises a connecting sleeve, a cavity, an air inlet interface, an air pressure sensor, a shunt, an air hole, a wind wheel, a mounting frame, an elastic strip and a bell, the connecting sleeve is fixed to the lower end of the shell, and a ceramic ring is fixed to the lower end of the connecting sleeve, A nozzle is fixed to the lower end of the ceramic ring, a cavity is provided in the connecting sleeve, the cavity is connected with the air inlet interface, an air pressure sensor is also installed on the connecting sleeve, and the probe of the air pressure sensor is arranged in the cavity, the cavity is connected with the branch channel, an air hole is opened on the branch channel, a wind wheel is arranged above the air hole, the wind wheel bearing is connected to the mounting frame, the mounting frame is fixed on the branch channel, one end of an elastic strip is fixed to the lower end of the mounting frame, a bell is fixed to the other end of the elastic strip, and the bell is slidably connected to the blades on the wind wheel.

[0006] Preferably, a cold water interface is installed on the shell, and the cold water interface and the circulation channel in the shell are interconnected, and the circulation channel is a spiral structure. Through the above structure, the cooling and heat dissipation effect of the device can be achieved to ensure the normal operation of the device.

[0007] Preferably, an upper protective mirror is fixed to the upper end of the inner side of the shell, and a collimating mirror is arranged below the upper protective mirror, and the collimating mirror is fixed on the movable frame, and the movable frame is connected to the first threaded rod through a thread, the first threaded rod bearing is connected in the shell, and the first threaded rod is fixed to the output end of the micro motor, and the micro motor is fixed in the shell, through the action of the micro motor and the first threaded rod, the height adjustment of the movable frame and the collimating mirror can be realized, thereby realizing the focal length adjustment of the device, so as to better meet the actual use requirements.

[0008] Preferably, the movable frame and the vertical rod are slidably connected, and the vertical rod is fixed in the shell. When the movable frame moves to drive the collimator to move, the sliding guide effect between the movable frame and the vertical rod can ensure the stability of the movement of the movable frame and the collimator.

[0009] Preferably, a focusing mirror, a middle protective mirror and a lower protective mirror are arranged on the lower side of the collimating mirror, and the focusing mirror, the middle protective mirror and the lower protective mirror are fixed in the outer shell from top to bottom in sequence. Through the above structure, the normal operation of the device can be guaranteed.

[0010] Preferably, the positioning mechanism includes a fixing rod, a ball, a limit plate, a convex tooth frame, a sliding rod and a spring. The fixing rod is slidably connected to the outer shell, and a rollable ball is installed at the lower end of the fixing rod. A limit plate is also fixed on the fixing rod, and the limit plate contacts the outer shell to achieve positioning. The distance between the lower end surface of the ball and the lower end surface of the nozzle is greater than the distance moved by the limit plate. The distance between the nozzle and the workpiece can be limited by the action of the fixing rod and the limit plate to avoid damage to the device caused by contact between the nozzle and the workpiece. The rolling action of the ball can ensure the normal operation of the device.

[0011] Preferably, a convex gear frame is fixed to the upper end of the fixed rod, and a sliding rod is fixed on the convex gear frame, and the sliding rod and the outer shell are slidably connected. When the convex gear frame is forced to move, the sliding guiding effect between the sliding rod and the outer shell can ensure that the convex gear frame performs stable linear motion.

[0012] Preferably, one end of a spring is fixed to the convex gear rack, and the other end of the spring is fixed to the housing, and the elastic action of the spring can provide a basic force for the automatic reset of the convex gear rack when the convex gear rack is not acted upon by an external force.

[0013] Preferably, the cleaning mechanism includes a second threaded rod, a gear, a movable plate and a high-temperature resistant wiping pad, the second threaded rod is connected to the outer shell with front and rear symmetrical bearings, and the distance between the two second threaded rods is greater than the diameter of the lower protective mirror, and a gear is fixed on the second threaded rod, and the gear and the convex gear rack are meshingly connected. When the convex gear rack moves, the transmission action between the convex gear rack and the gear can provide a basic force for the rotation of the second threaded rod.

[0014] Preferably, the second threaded rod is connected to the movable plate via a thread, and a high-temperature resistant wiping pad is fixed on the movable plate, and the high-temperature resistant wiping pad and the lower protective mirror are slidably connected. The position of the movable plate can be adjusted by the action of the second threaded rod. When the movable plate moves, the lower end surface of the lower protective mirror can be cleaned in cooperation with the sliding action between the high-temperature resistant wiping pad and the lower protective mirror, thereby ensuring the cleanliness of the lower protective mirror.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The fiber laser cutting head with built-in air leakage monitoring can determine the air pressure change inside the cavity when air leakage occurs during the use of the device, and then feedback the data to the control console to remind the staff. In combination with the functions of the diverter, air hole, wind wheel and elastic strip, the bell can make a sound when air leakage occurs, so that the sound alarm can be realized when the staff does not notice the alarm on the control console. In summary, through the dual monitoring mechanism, the staff can be reminded in time to maintain the equipment;

[0017] 2. The fiber laser cutting head with built-in air leakage monitoring can limit the distance between the nozzle and the workpiece through the action of the fixed rod, ball and limit plate during cutting, thereby avoiding damage to the device caused by collision between the nozzle and the workpiece, ensuring the safety of the device. During use, the movable plate and the high-temperature resistant wiping pad can be moved in conjunction with the action of the convex gear rack, sliding rod, spring, second threaded rod and gear, thereby cleaning the metal slag and residue on the surface of the lower protective mirror and ensuring the cleanliness of the lower protective mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the device of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall side view of the stereoscopic structure of the device of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall cross-section of the device of the present invention when viewed from above;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the shell section of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the detection mechanism of the present invention;

[0023] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the detection mechanism of the present invention;

[0024] Figure 7It is a schematic diagram of the three-dimensional structure of the positioning mechanism and the cleaning mechanism of the present invention.

[0025] In the figure: 1, housing; 101, cold water interface; 102, circulation channel; 2, optical fiber connection seat; 3, upper protective mirror; 4, collimating mirror; 5, movable frame; 6, first threaded rod; 7, micro motor; 8, vertical rod; 9, focusing mirror; 10, middle protective mirror; 11, lower protective mirror; 12, detection mechanism; 1201, connecting sleeve; 1202, cavity; 1203, air inlet interface; 1204, air pressure sensor; 1205, diversion channel; 1206, Air hole; 1207, wind wheel; 1208, mounting frame; 1209, elastic strip; 1210, bell; 13, ceramic ring; 14, nozzle; 15, positioning mechanism; 1501, fixing rod; 1502, ball bearing; 1503, limit plate; 1504, convex tooth frame; 1505, sliding rod; 1506, spring; 16, cleaning mechanism; 1601, second threaded rod; 1602, gear; 1603, movable plate; 1604, high temperature resistant wiping pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 7The present invention provides a technical solution: a fiber laser cutting head with built-in air leakage monitoring, comprising a shell 1 and a fiber connection seat 2, the fiber connection seat 2 is installed at the upper end of the shell 1, a detection mechanism 12 is installed at the lower end of the shell 1, a positioning mechanism 15 is arranged on the side of the detection mechanism 12, the positioning mechanism 15 and the cleaning mechanism 16 are connected to each other, the detection mechanism 12 comprises a connection sleeve 1201, a cavity 1202, an air inlet interface 1203, an air pressure sensor 1204, a diverter 1205, an air hole 1206, a wind wheel 1207, a mounting frame 1208, an elastic strip 1209 and a bell 1210, the connection sleeve 1201 is fixed to the lower end of the shell 1, a ceramic ring 13 is fixed at the lower end of the connection sleeve 1201, and a nozzle 14 is fixed at the lower end of the ceramic ring 13 A cavity 1202 is provided in the connecting sleeve 1201, and the cavity 1202 is connected with the air inlet interface 1203. An air pressure sensor 1204 is also installed on the connecting sleeve 1201, and the probe of the air pressure sensor 1204 is arranged in the cavity 1202. The cavity 1202 is connected with the branch channel 1205. An air hole 1206 is opened on the branch channel 1205. A wind wheel 1207 is arranged above the air hole 1206. The bearing of the wind wheel 1207 is connected to the mounting frame 1208, and the mounting frame 1208 is fixed on the branch channel 1205. One end of an elastic strip 1209 is fixed to the lower end of the mounting frame 1208, and a bell 1210 is fixed to the other end of the elastic strip 1209. The bell 1210 and the blades on the wind wheel 1207 are slidably connected.

[0028] A cold water interface 101 is installed on the shell 1, and the cold water interface 101 and the circulating flow channel 102 in the shell 1 are interconnected, and the circulating flow channel 102 is a spiral structure; an upper protective mirror 3 is fixed to the upper end of the inner side of the shell 1, and a collimating mirror 4 is arranged below the upper protective mirror 3, and the collimating mirror 4 is fixed on the movable frame 5, and the movable frame 5 is connected to the first threaded rod 6 through a thread, and the first threaded rod 6 is connected to the shell 1 by a bearing, and the first threaded rod 6 is fixed to the output end of the micro motor 7, and the micro motor 7 is fixed in the shell 1; the movable frame 5 and the vertical rod 8 are slidably connected, and the vertical rod 8 is fixed in the shell 1; a focusing mirror 9, a middle protective mirror 10 and a lower protective mirror 11 are arranged on the lower side of the collimating mirror 4, and the focusing mirror 9, the middle protective mirror 10 and the lower protective mirror 11 are fixed in the shell 1 from top to bottom in sequence;

[0029] When using the fiber laser cutting head with built-in air leakage monitoring, Figure 1-Figure 7As shown, the prime minister installs the entire device on an external driving part (such as a cylinder), and the installation and fixation of the optical fiber can be achieved through the optical fiber connecting seat 2. When cutting the workpiece, a laser beam is generated by the optical fiber, and the refraction that can be achieved by the collimator 4 can achieve laser amplification, and the focusing lens 9 can achieve laser focusing. Finally, the laser is ejected through the nozzle 14 to achieve the workpiece cutting effect. In the cutting process, the first threaded rod 6 is driven to rotate by controlling the micro motor 7, and the threaded connection between the first threaded rod 6 and the movable frame 5 and the sliding guide between the movable frame 5 and the vertical rod 8 can be adjusted. The height of the movable frame 5 and the collimator 4 can be adjusted, thereby adjusting the distance between the collimator 4 and the focusing lens 9, and then the focal length adjustment can be achieved to better meet the cutting requirements of the workpiece. In the use of the device, the heat dissipation of the device can be achieved by utilizing the functions of the cold water interface 101 and the circulating flow channel 102 to ensure the stable operation of the device. In the use of the device, the air inlet interface 1203 is connected to the air pump through a conduit to achieve the air supply effect. The airflow enters the connecting sleeve 1201 and is ejected through the nozzle 14, which can cut the workpiece. The slag on the cutting surface is blown off to ensure the cutting quality. When the connection sleeve 1201 is damaged and causes gas leakage, the gas enters the cavity 1202 at this time, and a part of the gas remains in the cavity 1202, which increases the internal air pressure of the cavity 1202. With the function of the air pressure sensor 1204, air pressure monitoring can be realized. When the air pressure change is sensed, it can be fed back to the control console for alarm to remind the staff. Another part of the gas enters the diversion channel 1205 and is discharged through the air hole 1206. Under the action of the airflow discharged from the air hole 1206, The wind wheel 1207 rotates, and when the fan blades on the wind wheel 1207 contact and slide with the bell 1210, the elastic strip 1209 is bent and deformed by force. When the fan blades on the wind wheel 1207 separate from the bell 1210, the bell 1210 is reset under the elastic action of the elastic strip 1209, so that the bell 1210 makes a sound, so that when the staff does not notice the alarm on the control console, a sound alarm is realized. In summary, through the dual monitoring mechanism, when the device leaks, the staff can be reminded in time to maintain the equipment to ensure the safe use of the device;

[0030] The positioning mechanism 15 includes a fixed rod 1501, a ball 1502, a limit plate 1503, a convex tooth frame 1504, a slide bar 1505 and a spring 1506. The fixed rod 1501 is slidably connected to the housing 1, and a rollable ball 1502 is installed at the lower end of the fixed rod 1501, and a limit plate 1503 is also fixed on the fixed rod 1501. At the same time, the limit plate 1503 contacts the housing 1 to achieve positioning, and the distance between the lower end surface of the ball 1502 and the lower end surface of the nozzle 14 is greater than the moving distance of the limit plate 1503; a convex tooth frame 1504 is fixed to the upper end of the fixed rod 1501, and a slide bar 1505 is fixed on the convex tooth frame 1504, and the slide bar 1505 is slidably connected to the housing 1; a convex tooth frame 1504 is fixed There is one end of a spring 1506, and the other end of the spring 1506 is fixed on the housing 1; the cleaning mechanism 16 includes a second threaded rod 1601, a gear 1602, a movable plate 1603 and a high temperature resistant wiping pad 1604, the second threaded rod 1601 is connected to the housing 1 with front and rear symmetrical bearings, and the distance between the two second threaded rods 1601 is greater than the diameter of the lower protective mirror 11, and the second threaded rod 1601 is fixed with a gear 1602, and the gear 1602 and the convex gear rack 1504 are meshingly connected; the second threaded rod 1601 is connected to the movable plate 1603 through a thread, and the movable plate 1603 is fixed with a high temperature resistant wiping pad 1604, and the high temperature resistant wiping pad 1604 and the lower protective mirror 11 are slidably connected;

[0031] During use of the device, if Figure 1-Figure 7As shown, when the height of the device is adjusted by the external driving member, the ball 1502 first contacts the workpiece, so that the slide bar 1505 is forced to slide upward relative to the shell 1 until the limit plate 1503 contacts the shell 1 to achieve positioning. Since the distance between the lower end surface of the ball 1502 and the lower end surface of the nozzle 14 is greater than the moving distance of the limit plate 1503, a certain distance is ensured between the nozzle 14 and the workpiece to avoid damage to the device caused by the collision between the nozzle 14 and the workpiece. After the positioning is completed, the workpiece is cut, and when the slide bar 1505 moves upward, the convex gear rack 1504 and the slide bar 1505 are synchronously driven to move upward, and the sliding guide effect between the slide bar 1505 and the shell 1 can ensure the stability of the movement of the convex gear rack 1504. At this time, the spring 1506 is forced to shrink, and when the convex gear rack 1504 moves, the meshing transmission effect between the gear 1602 and the convex gear rack 1504 can make the second threaded rod 1601 rotate, and the second threaded rod 1601 and the movable plate 16 03, the threaded connection between the movable plate 1603 and the high temperature resistant wiping pad 1604 causes the movable plate 1603 and the high temperature resistant wiping pad 1604 to move under force, and when the limit plate 1503 contacts the shell 1 to achieve positioning, the movable plate 1603 and the high temperature resistant wiping pad 1604 just move from the leftmost side to the rightmost side, avoiding the movable plate 1603 and the high temperature resistant wiping pad 1604 from blocking the protective mirror 11 and affecting the normal operation of the device, and when the high temperature resistant wiping pad 1604 moves, the residue or metal slag on the lower end surface of the protective mirror 11 can be cleaned through the sliding action between the high temperature resistant wiping pad 1604 and the protective mirror 11, so as to ensure the cleanliness of the protective mirror 11, and after the workpiece is cut, when the ball 1502 is separated from the workpiece, the convex tooth frame 1504 is reset under the action of the spring 1506, so that the movable plate 1603 and the high temperature resistant wiping pad 1604 move from the rightmost side to the leftmost side and reset, and the cleaning effect of the protective mirror 11 is realized again. This is the working principle of the optical fiber laser cutting head with built-in air leakage monitoring.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fiber laser cutting head with built-in air leakage monitoring, comprising a housing (1) and a fiber connection seat (2), wherein the fiber connection seat (2) is mounted on the upper end of the housing (1), and characterized in that: A detection mechanism (12) is installed at the lower end of the housing (1), a positioning mechanism (15) is arranged on the side of the detection mechanism (12), the positioning mechanism (15) and the cleaning mechanism (16) are connected to each other, the detection mechanism (12) comprises a connecting sleeve (1201), a cavity (1202), an air inlet interface (1203), an air pressure sensor (1204), a flow divider (1205), an air hole (1206), a wind wheel (1207), a mounting frame (1208), an elastic strip (1209) and a bell (1210), the connecting sleeve (1201) is fixed to the lower end of the housing (1), a ceramic ring (13) is fixed at the lower end of the connecting sleeve (1201), and the lower end of the ceramic ring (13) A nozzle (14) is fixed at the end thereof, a cavity (1202) is arranged in the connecting sleeve (1201), the cavity (1202) and the air inlet interface (1203) are connected to each other, an air pressure sensor (1204) is also installed on the connecting sleeve (1201), and a probe of the air pressure sensor (1204) is arranged in the cavity (1202), the cavity (1202) and the flow branch channel (1205) are connected, an air hole (1206) is opened on the flow branch channel (1205), a wind wheel (1207) is arranged above the air hole (1206), and a bearing of the wind wheel (1207) is connected to a mounting frame (1208), and the mounting frame (1208) is fixed to the flow branch channel (1205). The mounting frame (1208) is provided with one end of an elastic strip (1209) fixed at the lower end thereof, and a bell (1210) is fixed at the other end thereof; the bell (1210) is slidably connected to the blades on the wind wheel (1207); the positioning mechanism (15) comprises a fixing rod (1501), a ball bearing (1502), a limiting plate (1503), a convex tooth frame (1504), a sliding rod (1505) and a spring (1506); the fixing rod (1501) is slidably connected to the housing (1), and a rolling ball bearing (1502) is mounted at the lower end of the fixing rod (1501); the limiting plate (1503) is also fixed to the fixing rod (1501), and the limiting plate (1503) is also fixed to the fixing rod (1501); and the limiting plate (1503) is also fixed to the fixing rod (1501). The positioning plate (1503) contacts the housing (1) to achieve positioning, the distance between the lower end surface of the ball (1502) and the lower end surface of the nozzle (14) is greater than the distance moved by the limiting plate (1503), the cleaning mechanism (16) comprises a second threaded rod (1601), a gear (1602), a movable plate (1603) and a high temperature resistant wiping pad (1604), the second threaded rod (1601) is connected to the housing (1) with front and rear symmetrical bearings, the distance between the two second threaded rods (1601) is greater than the diameter of the lower protective mirror (11), and a gear (1602) is fixed to the second threaded rod (1601), and the gear (1602) and the convex gear rack (1504) are meshingly connected.

2. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 1, characterized in that: A cold water interface (101) is installed on the shell (1), and the cold water interface (101) and a circulating flow channel (102) in the shell (1) are interconnected, and the circulating flow channel (102) is a spiral structure.

3. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 1, characterized in that: An upper protective mirror (3) is fixed to the upper end of the inner side of the housing (1), and a collimator (4) is arranged below the upper protective mirror (3), and the collimator (4) is fixed to a movable frame (5), and the movable frame (5) is connected to a first threaded rod (6) via a thread, and the first threaded rod (6) is connected to the housing (1) by a bearing, and the first threaded rod (6) is fixed to the output end of a micro motor (7), and the micro motor (7) is fixed in the housing (1).

4. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 3, characterized in that: The movable frame (5) and the vertical rod (8) are slidably connected, and the vertical rod (8) is fixed in the outer shell (1).

5. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 3, characterized in that: A focusing mirror (9), a middle protective mirror (10) and a lower protective mirror (11) are arranged on the lower side of the collimating mirror (4), and the focusing mirror (9), the middle protective mirror (10) and the lower protective mirror (11) are fixed in sequence from top to bottom in the housing (1).

6. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 1, characterized in that: A convex tooth frame (1504) is fixed to the upper end of the fixed rod (1501), a sliding rod (1505) is fixed on the convex tooth frame (1504), and the sliding rod (1505) is slidably connected to the housing (1).

7. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 6, characterized in that: One end of a spring (1506) is fixed on the convex tooth frame (1504), and the other end of the spring (1506) is fixed on the housing (1).

8. The optical fiber laser cutting head with built-in air leakage monitoring according to claim 1, characterized in that: The second threaded rod (1601) is connected to the movable plate (1603) via a thread, and a high temperature resistant wiping pad (1604) is fixed on the movable plate (1603), and the high temperature resistant wiping pad (1604) is slidably connected to the lower protective mirror (11).

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