Automatic welding and positioning device for equipment base

Abstract

The automatic welding positioning device comprises a laser displacement sensing unit fixedly connected to an automatic welding robot, the lower end of the laser displacement sensing unit is sleeved with a protection unit, and the side wall of the protection unit is fixedly connected with a pressurizing air pump matched with the protection unit; by arranging the pressurizing air pump, an air curtain can be formed on the lower side of the protection unit, on one hand, smoke generated during welding work can be blown away, on the other hand, the smoke can be effectively prevented from entering the protection unit through the first vent hole, and when the laser displacement sensing unit receives that the intensity of echoes is reduced or multiple false echoes appear, the smoke can be prevented from entering the protection unit. The control device is used for controlling the pressurizing air pump to generate pulse type air flow for judging whether the smoke generated in the welding process affects echo or the first protective lens is contaminated with dirt, targeted treatment can be conducted, false alarm is not prone to being given out in the working process, and the working continuity of the automatic welding equipment is not prone to being affected.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, and in particular to an automated welding positioning device for equipment base. Background Technology

[0002] With the development of digitalization, automation, computer and mechanical design technologies, and the high importance attached to welding quality, automatic welding has developed into an advanced manufacturing technology. Automatic welding equipment plays an increasingly important role in various industries, and its application scope is rapidly expanding. In the existing technology, the main automated welding equipment is various robotic arms. When welding the equipment base, the equipment can be automatically fed on the automated production line to weld each bracket separately to form an integral equipment base.

[0003] The invention patent with publication number CN105479052B discloses a weld seam tracking sensor structure. The filter is designed to allow light to pass through while blocking welding spatter to protect the organic glass plate of the camera and laser. The filter is installed in a groove on the lower plate for easy replacement after it is contaminated by spatter and smoke.

[0004] The invention patent with publication number CN111136392B discloses a crankshaft laser welding workstation and its method. The fume purifier can purify a large number of fine metal particles that are harmful to the human body and suspended in the air, while also reducing the impact on the normal operation of the positioning components.

[0005] In existing technologies, positioning devices for automatic welding equipment mainly fall into two categories: laser displacement sensors and vision inspection systems. The fumes generated during welding can significantly impact the normal operation of both laser displacement sensors and vision inspection systems. While existing technologies can protect the positioning devices with fume purification and protective devices, in practice, as working time increases, contaminants easily adhere to the protective devices. The laser displacement sensors struggle to self-check for the effects of fixed contamination and fumes, leading to false alarms during operation. This disrupts the continuity of automatic welding equipment operation and reduces its production efficiency. Summary of the Invention

[0006] The core of this invention lies in controlling the pressurized air pump to generate pulsed airflow when the laser displacement sensing unit receives a decrease in echo intensity or multiple false echoes. This is used to determine whether the excessive smoke generated during the welding process is affecting the echo or whether the protective lens is contaminated with dirt. Targeted measures can be taken to address this issue, minimizing the likelihood of false alarms during operation and ensuring the continuity of automatic welding equipment.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] An automated welding positioning device for equipment base, by setting up a pressurized air pump, can form an air curtain on the lower side of the protective unit. On the one hand, it can disperse the smoke generated during welding, and on the other hand, it can effectively prevent smoke from entering the protective unit through the vent, thus avoiding contamination of the laser displacement sensing unit. When the laser displacement sensing unit receives a decrease in echo intensity or multiple false echoes, it controls the pressurized air pump to generate pulsed airflow to determine whether the excessive smoke generated during the welding process is affecting the echo or whether the protective lens is contaminated with dirt, and can take targeted measures. It is less likely to issue false alarms during operation and less likely to affect the continuous operation of the automatic welding equipment.

[0009] Furthermore, a pair of marking grooves are cut into the outer wall of the cylindrical housing, each matching the position of the two locking holes. A notch groove is also cut into the cylindrical housing, matching the position of the locking key, so that technicians can accurately position the locking key when installing and removing the locking bolt.

[0010] Furthermore, the compensation unit has an elastic cavity, which is filled with multiple elastic filler balls. The shapes and volumes of the multiple elastic filler balls are different, which makes the deformation of the compensation unit more uniform and less likely to cause damage due to excessive local deformation.

[0011] Furthermore, a protective film is fixedly connected to the lower end of the lens body, and the end of the protective film away from the lens body is coated with a hydrophobic and oleophobic coating to reduce the possibility of dirt adhering to the lens body.

[0012] Meanwhile, multiple smoke-proof units 2 are fixedly connected to the inner wall of the cylindrical shell to replace the protective lens 1. The smoke-proof unit 2 includes the protective lens 2. A protective jacket is fixedly connected between the protective lens 2 and the inner wall of the cylindrical shell. Multiple ventilation holes 2 are drilled on the protective jacket. A movable groove is drilled at the lower end of the cylindrical shell. A power ring is fixedly connected to the lower opening of the movable groove. The power ring includes a ring platform. An electromagnetic ring is fixedly connected to the upper end of the ring platform. A cleaning unit is slidably connected in the movable groove. The cleaning unit includes a magnetic ring. The magnetic ring and the energized electromagnetic ring repel each other. Multiple sealing blocks matching the ventilation holes 2 are fixedly connected to the inner wall of the magnetic ring, so as to separate the smoke-proof unit 2 contaminated by dirt from the protective unit, extend the service life of the protective unit, and further increase the continuous working time of the automatic welding robot.

[0013] Furthermore, the cross-section of the second vent is trumpet-shaped, and the diameter of the upper end of the second vent is smaller than that of the lower end, making it easier for the sealing block to engage inside the second vent and complete the seal, which facilitates the subsequent separation of the entire smoke prevention unit.

[0014] Furthermore, cutting blades are fixedly connected to the side walls of multiple sealing blocks, with the blades pointing upwards to protect the outer casing. This makes it easier to separate the smoke-proof unit 2 from the protective unit. On the other hand, it makes the cuts on the remaining parts of the smoke-proof unit 2 on the inner wall of the protective unit smoother and less likely to affect the subsequent cutting work of the cleaning unit on the smoke-proof unit 2.

[0015] Furthermore, the protective cover is made of elastic material and completely covers the second protective lens, effectively protecting the second vent.

[0016] Compared with the prior art, the advantages of this invention are: In this solution, a pressurized air pump forms an air curtain on the lower side of the protective unit. This can disperse the fumes generated during welding and effectively prevent fumes from entering the protective unit through the vents, thus minimizing contamination of the laser displacement sensing unit. When the laser displacement sensing unit receives a decrease in echo intensity or multiple false echoes, the pressurized air pump is controlled to generate a pulsed airflow to determine whether the excessive fumes generated during welding are affecting the echo or whether the protective lens is contaminated with dirt. Targeted measures can be taken to address this issue, minimizing the likelihood of false alarms during operation and ensuring the continuity of the automatic welding equipment. At the same time, multiple anti-smoke units 2 are set up to replace the protective lens 1. With the cooperation of the cleaning unit and the power ring, the anti-smoke units 2 with adhering dirt are separated, so that the protective unit can return to normal operation, extend the service life of the protective unit, and further increase the continuous working time of the automatic welding robot. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the automatic welding device with a positioning device according to the first embodiment. Figure 2 This is a schematic diagram of the positioning device according to the first embodiment; Figure 3 This is a front sectional view of the positioning device according to the first embodiment; Figure 4 This is a schematic diagram of the structure of the protection unit in the first embodiment; Figure 5 This is a schematic diagram of the locking bolt according to the first embodiment; Figure 6 This is a schematic diagram of the positioning device according to the second embodiment; Figure 7 This is a front sectional view of the positioning device according to the second embodiment; Figure 8 This is a schematic diagram of the structure of the protection unit in the second embodiment; Figure 9 This is a schematic diagram of the power ring in the second embodiment. Figure 10 This is a schematic diagram of the cleaning unit in the second embodiment.

[0018] Explanation of the labels in the diagram: 1 Automatic welding robot, 2 Laser displacement sensing unit, 201 Laser displacement sensor, 202 Fixing groove, 3 Protective unit, 301 Cylindrical shell, 302 Mounting groove, 303 Vent hole, 304 Movable hole, 305 Limiting ring, 306 Locking hole, 307 Marking groove, 308 Movable groove, 4 Pressurized air pump, 5 Locking bolt, 501 Bolt body, 502 Locking key, 503 Compensation unit, 504 Elastic filling ball, 505 Notch groove, 6 Protective lens one, 601 Lens body, 602 Vent hole one, 7 Cleaning unit, 701 Magnetic ring, 702 Sealing block, 703 Cutting blade, 8 Anti-smoke unit two, 801 Protective lens two, 802 Protective jacket, 803 Vent hole two, 9 Power ring, 901 Ring stage, 902 Electromagnetic ring. Detailed Implementation

[0019] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0020] First implementation method: Please see Figures 1-5 An automated welding positioning device for a device base includes a laser displacement sensing unit 2 fixedly connected to an automatic welding robot 1. The position of the laser displacement sensing unit 2 matches the welding torch on the automatic welding robot 1. The laser displacement sensing unit 2 includes a laser displacement sensor 201. A pair of fixing grooves 202 are carved on the laser displacement sensor 201. A protective unit 3 is sleeved on the lower end of the laser displacement sensor 201. The protective unit 3 includes a cylindrical shell 301. An installation groove 302 is carved on the side wall of the cylindrical shell 301. A vent hole 303 is opened on the cylindrical shell 301. The vent hole 303 connects the installation groove 302 and the internal space of the cylindrical shell 301. A pressurized air pump 4 that matches itself is fixedly connected in the installation groove 302. A protective lens 6 is fixedly connected to the lower opening of the cylindrical shell 301. The protective lens 6 includes a lens body 601. Multiple vent holes 602 are carved on the side wall of the lens body 601. The upper end of the mounting groove 302 is provided with a pair of movable holes 304 that match the two fixed grooves 202 respectively. Limiting rings 305 are fixedly connected to the openings at both ends of the two movable holes 304. Locking bolts 5 are inserted into the two movable holes 304. The locking bolts 5 include bolt bodies 501. The bolt bodies 501 pass through the movable holes 304 and extend into the fixed grooves 202. Locking keys 502 are fixedly connected to the side wall of the bolt bodies 501. Locking holes 306 matching the locking keys 502 are provided on the two limiting rings 305 located on the inner side. A compensation unit 503 is fixedly connected to one end of the bolt bodies 501 located in the fixed grooves 202.

[0021] The laser displacement sensing unit 2 and the protective unit 3 can be quickly installed and disassembled via a locking bolt 5. Technicians can rotate the bolt body 501 to align the locking key 502 with the locking hole 306, allowing the bolt body 501 to be inserted and removed normally. This is used to lock or release the laser displacement sensing unit 2 and the protective unit 3. When locking the laser displacement sensing unit 2 and the protective unit 3, after inserting the bolt body 501 into the laser displacement sensing unit 2, the bolt body 501 must be rotated to misalign the locking key 502 with the locking hole 306, preventing the bolt body 501 from falling out of the laser displacement sensing unit 2. At the same time, the bolt body 501 will compress the compensation unit 503, causing deformation and increasing the pressure between the locking key 502 and the limiting ring 305, thereby increasing the friction between the two. This makes it less likely for the locking bolt 5 to rotate during the operation of the automatic welding robot 1, thus preventing the laser displacement sensing unit 2 and the protective unit 3 from being unlocked.

[0022] The pressurized air pump 4 can form an air curtain on the lower side of the protective unit 3. On the one hand, it can disperse the smoke generated during welding, and on the other hand, it can effectively prevent the smoke from entering the protective unit 3 through the vent 602, so as not to contaminate the laser displacement sensing unit 2.

[0023] In particular, in this embodiment, the laser displacement sensing unit 2 is equipped with a control terminal for controlling each electrical structure and receiving the detection data from the laser displacement sensing unit 2. The power supply and control of each electrical structure are well-known technologies to those skilled in the art. Those skilled in the art can make reasonable settings based on existing technologies so that each electrical unit can work according to the needs of the technicians.

[0024] During normal operation of the automatic welding robot 1, the laser displacement sensing unit 2 continuously generates a laser beam and determines the distance between the laser displacement sensing unit 2 and the surface of the workpiece by receiving the laser beam echo, thus assisting in the positioning of the automatic welding robot 1. However, when there is smoke between the laser displacement sensing unit 2 and the protective unit 3, it will cause the laser beam to scatter. At the same time, the smoke will also absorb part of the laser beam, resulting in a decrease in echo intensity and multiple false echoes, which will affect the measurement accuracy.

[0025] When the laser displacement sensing unit 2 receives a decrease in echo intensity or multiple false echoes, it controls the pressurized air pump 4 to generate pulsed airflow, resulting in pulsed airflow on the lower side of the laser displacement sensing unit 2. When the smoke concentration on the lower side of the protective unit 3 is too high, the pulsed airflow will affect the smoke pattern. At this time, the echo of the laser beam will also be affected accordingly (the greater the airflow intensity, the greater the laser beam echo intensity, and the reduction of multiple echo phenomenon. The echo intensity and the phenomenon of multiple echo will have a certain lag). Based on the echo detection results, the airflow injection intensity of the pressurized air pump 4 can be increased to reduce the impact of smoke on the normal operation of the laser displacement sensing unit 2. After the pressurized air pump 4 increases the airflow injection intensity for a period of time (preset), the pulsed airflow is restarted for detection. When the laser beam echo is unaffected, the airflow intensity of the pressurized air pump 4 gradually returns to the initial set value. When the laser beam echo still changes according to the airflow intensity, the pressurized air pump 4 maintains the current airflow intensity.

[0026] When dirt adheres to the lens body 601, the airflow generated by the pressurized air pump 4 cannot remove the dirt, and the pulsed airflow generated by it cannot affect the echo. At this time, the control terminal issues an alarm and contacts technicians to clean the protective lens 6 or replace the protective unit 3.

[0027] In this embodiment, the pressurized air pump 4 can form an air curtain on the lower side of the protective unit 3. On the one hand, it can disperse the smoke generated during welding, and on the other hand, it can effectively prevent the smoke from entering the protective unit 3 through the vent hole 602, which is less likely to contaminate the laser displacement sensing unit 2. When the laser displacement sensing unit 2 receives a decrease in echo intensity or multiple false echoes, the pressurized air pump 4 is controlled to generate a pulsed airflow to determine whether the excessive smoke generated during the welding process is affecting the echo or whether the protective lens 6 is contaminated with dirt. Targeted treatment can be carried out, thus reducing the likelihood of false alarms during operation and ensuring the continuity of the automatic welding equipment.

[0028] The outer wall of the cylindrical housing 301 is provided with a pair of marking grooves 307 that match the positions of the two locking holes 306 respectively. The cylindrical housing 301 is also provided with a notch groove 505 that matches the position of the locking key 502, so that technicians can accurately position the locking key 502 when installing and removing the locking bolt 5.

[0029] The compensation unit 503 has an elastic cavity, which is filled with multiple elastic filling balls 504. The multiple elastic filling balls 504 have different shapes and volumes. When the compensation unit 503 is compressed and changes direction, it will simultaneously compress the elastic filling balls 504, which makes the deformed compensation unit 503 more likely to fit the surface of the plug body 501, making the deformation of the compensation unit 503 more uniform and less likely to be damaged by excessive local deformation.

[0030] A protective film is fixedly connected to the lower end of the lens body 601. The end of the protective film away from the lens body 601 is coated with a hydrophobic and oleophobic coating to reduce the possibility of dirt adhering to the lens body 601.

[0031] Second implementation method: Please see Figures 6-10 An automated welding positioning device for a base of equipment is disclosed. A plurality of smoke-proof units 8 are fixedly connected to the inner wall of a cylindrical outer shell 301 to replace a protective lens 6. Each smoke-proof unit 8 includes a protective lens 801. A protective outer sleeve 802 is fixedly connected between the protective lens 801 and the inner wall of the cylindrical outer shell 301. Multiple ventilation holes 803 are drilled in the protective outer sleeve 802. A movable groove 308 is drilled at the lower end of the cylindrical outer shell 301. A power ring 9 is fixedly connected to the lower opening of the movable groove 308. The power ring 9 includes a ring platform 901. An electromagnetic ring 902 is fixedly connected to the upper end of the ring platform 901. A cleaning unit 7 is slidably connected inside the movable groove 308. The cleaning unit 7 includes a magnetic ring 701. The magnetic ring 701 and the energized electromagnetic ring 902 repel each other. A plurality of sealing blocks 702 matching the ventilation holes 803 are fixedly connected to the inner wall of the magnetic ring 701.

[0032] In this embodiment, the method for detecting whether there is dirt on the second smoke-proof unit 8 is the same as the method for detecting dirt on the first protective lens 6 in the first embodiment. When it is determined that there is dirt on the second smoke-proof unit 8 located at the bottom, the electromagnetic ring 902 is energized, causing the power ring 9 to move upward as a whole until the sealing block 702 blocks the second vent 803. Then, the power of the pressurized air pump 4 is increased to increase the air pressure inside the cylindrical shell 301, causing the second smoke-proof unit 8 at the bottom to break off from the protective unit 3. At this time, the surfaces of the multiple second smoke-proof units 8 located in the protective unit 3 are not contaminated with dirt, and the laser displacement sensing unit 2 can work normally, realizing the separation of the contaminated second smoke-proof unit 8 from the protective unit 3, extending the service life of the protective unit 3, and further increasing the continuous working time of the automatic welding robot 1.

[0033] The cross-section of the second vent 803 is trumpet-shaped, and the upper diameter of the second vent 803 is smaller than the lower diameter, which makes it easier for the sealing block 702 to be engaged in the second vent 803 and complete the seal, facilitating the subsequent separation of the entire smoke prevention unit 8.

[0034] Cutting blades 703 are fixedly connected to the side walls of multiple sealing blocks 702, with the cutting edge of the cutting blades 703 facing upwards to protect the outer casing 802. This makes it easier to separate the smoke-proof unit 2 8 from the protective unit 3. On the other hand, it makes the cut of the remaining part of the smoke-proof unit 2 8 on the inner wall of the protective unit 3 smoother and less likely to affect the subsequent cutting work of the cleaning unit 7 on the smoke-proof unit 2 8.

[0035] The protective cover 802 is made of elastic material and completely covers the protective lens 801. The protective cover 802 can effectively protect the vent 803, so that the separated vent 803 is not easily broken by external forces such as falling, which facilitates the maintenance of the cleanliness of the production line.

[0036] Compared to the first embodiment, this embodiment provides multiple smoke-proof units 8 for protection. With the cooperation of the cleaning unit 7 and the power ring 9, the smoke-proof units 8 with adhering dirt are separated, so that the protection unit 3 can resume normal operation, extend the service life of the protection unit 3, and further increase the continuous working time of the automatic welding robot 1.

[0037] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. An automated welding positioning device for equipment base, comprising a laser displacement sensing unit (2) fixedly connected to an automated welding robot (1), characterized in that: The laser displacement sensing unit (2) includes a laser displacement sensor (201), a pair of fixing grooves (202) are carved on the laser displacement sensor (201), a protective unit (3) is sleeved on the lower end of the laser displacement sensor (201), the protective unit (3) includes a cylindrical shell (301), an installation groove (302) is carved on the side wall of the cylindrical shell (301), a vent hole (303) is opened on the cylindrical shell (301), the vent hole (303) connects the installation groove (302) and the internal space of the cylindrical shell (301), a pressurized air pump (4) that matches itself is fixedly connected in the installation groove (302), a protective lens (6) is fixedly connected at the lower opening of the cylindrical shell (301), the protective lens (6) includes a lens body (601), a plurality of vent holes (602) are carved on the side wall of the lens body (601). The upper end of the mounting groove (302) is provided with a pair of movable holes (304) that match the two fixed grooves (202) respectively. Limiting rings (305) are fixedly connected to the openings at both ends of the two movable holes (304). Locking bolts (5) are inserted into the two movable holes (304). The locking bolts (5) include bolt bodies (501). The bolt bodies (501) pass through the movable holes (304) and extend into the fixed grooves (202). Locking keys (502) are fixedly connected to the side wall of the bolt bodies (501). Locking holes (306) matching the locking keys (502) are provided on the two limiting rings (305) located on the inner side. A compensation unit (503) is fixedly connected to one end of the bolt bodies (501) located in the fixed grooves (202).

2. The automated welding positioning device for equipment base according to claim 1, characterized in that: The outer wall of the cylindrical housing (301) is provided with a pair of marking grooves (307) that match the positions of the two locking holes (306) respectively, and the cylindrical housing (301) is provided with a notch groove (505) that matches the position of the locking key (502).

3. The automated welding positioning device for equipment base according to claim 1, characterized in that: The compensation unit (503) has an elastic cavity, which is filled with a plurality of elastic filling balls (504), and the plurality of elastic filling balls (504) have different shapes.

4. The automated welding positioning device for equipment base according to claim 1, characterized in that: A protective film is fixedly connected to the lower end of the lens body (601), and the end of the protective film away from the lens body (601) is coated with a hydrophobic and oleophobic coating.

5. The automated welding positioning device for equipment base according to claim 1, characterized in that: Multiple smoke-proof units (8) are fixedly connected to the inner wall of the cylindrical outer shell (301) to replace the protective lens (6). Each smoke-proof unit (8) includes a protective lens (801). A protective outer sleeve (802) is fixedly connected between the protective lens (801) and the inner wall of the cylindrical outer shell (301). Multiple ventilation holes (803) are drilled on the protective outer sleeve (802). A movable groove (308) is drilled at the lower end of the cylindrical outer shell (301). A power ring (9) is fixedly connected to the opening. The power ring (9) includes an annular platform (901). An electromagnetic ring (902) is fixedly connected to the upper end of the annular platform (901). A cleaning unit (7) is slidably connected in the movable groove (308). The cleaning unit (7) includes a magnetic ring (701). The magnetic ring (701) and the energized electromagnetic ring (902) repel each other. A plurality of sealing blocks (702) that match the second vent (803) are fixedly connected to the inner wall of the magnetic ring (701).

6. The automated welding positioning device for equipment base according to claim 5, characterized in that: The cross-section of the second vent (803) is trumpet-shaped, and the upper diameter of the second vent (803) is smaller than the lower diameter.

7. The automated welding positioning device for equipment base according to claim 5, characterized in that: Cutting blades (703) are fixedly connected to the side walls of the multiple sealing blocks (702), and the cutting blades (703) face upwards.

8. The automated welding positioning device for equipment base according to claim 5, characterized in that: The protective cover (802) is made of elastic material and completely covers the protective lens (801).

Images