Welding wire buffering device and robot welding system
By adjusting the wire feeding speed in real time through the arc-shaped wire structure cavity and detection device, and combining the four-drive wire feeder and the single-drive wire feeder, the problem of unstable wire feeding is solved, thereby improving welding quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING ESTON ELECTRIC CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-17
AI Technical Summary
In existing welding technologies, the welding wire feed is unstable, leading to welding quality problems. In particular, when the robot moves at high speed or the welding path changes abruptly, the welding wire may become loose or too tight, affecting the welding quality.
A wire buffer device is adopted, which detects the bending radius of the wire through the arc-shaped wire structure cavity and the detection device, and adjusts the wire feeding speed in real time. Combined with a four-drive wire feeder and a single-drive wire feeder, the wire feeding speed can be precisely controlled.
Improve the stability of welding wire feeding, ensure welding quality, reduce wire breakage and uneven weld, and achieve stability and precise control of the welding process.
Smart Images
Figure CN224128922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a welding wire buffer device and a robotic welding system, belonging to the technical field of welding equipment. Background Technology
[0002] In automated welding processes, the stability of wire feeding directly affects welding quality. In existing technologies, the wire is fed forward along the feeding direction, which means it can only be fed forward continuously at a preset speed and is in an uncontrolled state. The tension control of existing wire feeding mechanisms relies on mechanical springs or gravity counterweights, which are prone to tension instability due to changes in the weight of the welding pad or mechanical vibration, leading to wire breakage or uneven welds. Existing buffer devices cannot be dynamically adjusted in real time, and problems such as wire slack or excessive tightness frequently occur when the robot moves at high speed or the welding path changes abruptly. Summary of the Invention
[0003] One objective of this invention is to provide a welding wire buffer device to address the technical defects in the prior art where unstable welding wire feeding affects welding quality.
[0004] To solve the above problems, the technical solution adopted by this utility model is: a welding wire buffer device, including a housing and a detection device; the housing is installed on a fixed object in the use state, and a welding wire structure cavity is provided inside the housing, extending through both ends of the housing. The welding wire structure cavity is arc-shaped inside the housing, with the wire inlet end and the wire outlet end being the two ends respectively. In the use state, the welding wire enters the welding wire structure cavity from the wire inlet end and extends out of the welding wire structure cavity from the wire outlet end. When the welding wire is fed in the welding wire structure cavity, it bends into an arc shape, and the bending radius of the welding wire increases or decreases with the increase or decrease of the wire feeding speed; the detection device is located inside the housing on one side of the arc center of the welding wire structure cavity. The detection device determines whether the bending radius of the welding wire increases or decreases by detecting the increase or decrease of the distance between the welding wire and the wire, and is used to determine whether the wire feeding speed increases or decreases. This invention features an arc-shaped welding wire cavity within the outer casing, allowing the welding wire to bend within the casing. This provides a buffer when the wire feeding speed is too fast. Simultaneously, the invention includes a detection device that measures the distance between the device and the welding wire to determine the bending radius of the wire. This determines whether the wire feeding speed should be increased or decreased, providing a basis for adjusting the wire feeding speed. This ensures the wire is fed at an appropriate speed, improving the stability of the wire feeding process and ultimately enhancing the welding quality.
[0005] As a further improvement of this utility model, it also includes an internal water channel structure cavity and a communication cable structure cavity; the internal water channel structure cavity extends through both ends of the outer shell and is used to allow cooling water to pass through during use; the communication cable structure cavity extends through both ends of the outer shell and is used to allow communication cables to pass through during use; the internal water channel structure cavity and the communication cable structure cavity are respectively disposed on both sides of the welding wire structure cavity and are separated from the welding wire structure cavity. By setting the internal water channel structure cavity and the communication cable structure cavity inside the outer shell and separating them from the welding wire structure cavity, this utility model eliminates the need for separate corresponding pipes outside the outer shell during use, and also facilitates connection during use.
[0006] As a further improvement of this utility model, a first quick-connect interface and a second quick-connect interface are respectively provided at both ends of the outer shell. One end of the welding wire structure cavity, the inner water channel structure cavity, and the communication cable structure cavity are all connected to the first quick-connect interface, and the other end of the welding wire structure cavity, the inner water channel structure cavity, and the communication cable structure cavity are all connected to the second quick-connect interface. The first quick-connect interface and the second quick-connect interface are used to connect the cable assembly through which the welding wire, cooling water, and communication cable pass. By providing the first quick-connect interface and the second quick-connect interface at both ends of the outer shell, this utility model further facilitates the connection of this utility model with the cable assembly in use.
[0007] As a further improvement of this invention, the detection device includes an ultrasonic ranging sensor, which is fixed inside the housing. During use, the ultrasonic ranging sensor emits ultrasonic waves and receives the ultrasonic waves reflected back by the welding wire to determine the distance between itself and the welding wire. This invention uses the ultrasonic ranging sensor to detect the distance between itself and the welding wire, thereby determining the change in the bending radius of the welding wire. The overall structure is simple, and installation and testing are convenient.
[0008] As a further improvement of this invention, the detection device also includes a reflector fixed inside the housing. The angle between the longitudinal direction of the ultrasonic ranging sensor and the reflecting surface of the reflector is α, where 80°≤α≤90°. The ultrasonic waves emitted by the ultrasonic ranging sensor are reflected by the reflector to the welding wire, then reflected back to the reflector, and finally received by the ultrasonic ranging sensor to determine the distance between the ultrasonic ranging sensor and the welding wire. By incorporating a reflector, this invention allows the ultrasonic ranging sensor to be positioned outside the radial direction of the welding wire bend, thus reducing the space occupied by the entire detection device in the radial direction of the welding wire bend.
[0009] As a further improvement of this utility model, it also includes a flip cover, one side of which is connected to the outer shell and can be flipped relative to the outer shell. An installation hole communicating with the welding wire structure cavity is provided on the outer shell. Flipping the cover can open or close the installation hole. The side of the flip cover away from its rotatable connection with the outer shell can cooperate with the outer shell. This utility model features a flip cover, which facilitates the installation and maintenance of the detection device through its flipping mechanism.
[0010] As a further improvement of this invention, an observation window is also included. This observation window is made of transparent material and fixed to the flip cover, allowing observation of the welding wire's position without opening the flip cover. This invention provides an observation window on the flip cover, facilitating observation of the welding wire's position.
[0011] Another objective of this invention is to provide a robotic welding system that addresses the technical shortcomings of existing robotic welding systems, such as the inability to dynamically adjust the wire feeding speed in real time, and the resulting loose or overly tight wire affecting welding quality.
[0012] To solve the above problems, the technical solution adopted by this utility model is: a robotic welding system, including a robot, a second wire feeder, and a robotic welding torch; the second wire feeder is mounted on the robot's arm; the robotic welding torch is mounted on the second wire feeder; it also includes a first wire feeder and a wire buffer device; the wire buffer device is fixed to the robot, the wire inlet end of the wire buffer device is connected to the first wire feeder via a first cable assembly, and the wire outlet end of the wire buffer device is connected to the second wire feeder via a second cable assembly. The welding wire passes sequentially through the first wire feeder, the wire buffer device, and the second wire feeder into the robotic welding torch. The first wire feeder is used to feed the welding wire into the wire buffer device, and the second wire feeder is used to feed the welding wire into the robotic welding torch. This utility model detects the real-time wire feeding speed of the welding wire through the wire buffer device, and thus adjusts the wire feeding speed of the welding wire through the first wire feeder according to the real-time wire feeding speed, so that the wire feeding speeds of the first wire feeder and the second wire feeder are comparable, avoiding the welding quality of the workpiece due to loose or overly tight welding wire.
[0013] As a further improvement of this utility model, the first wire feeder includes a first wire feeding frame, a first drive motor, and a first conveying wheel assembly mounted on the first wire feeding frame. The first conveying wheel assembly includes two first conveying wheels, one of which is connected to the first drive motor. The welding wire passes between the two first conveying wheels, and the first drive motor drives the first conveying wheel to rotate, providing power for wire feeding. The second wire feeder includes a second wire feeding frame, a second drive motor, and two second conveying wheel assemblies arranged side by side on the second wire feeding frame. Each second conveying wheel assembly includes two second conveying wheels, both of which are driven to rotate by the second drive motor. The two second conveying wheels in the second conveying wheel assembly rotate in opposite directions, and the welding wire passes between the two second conveying wheels, with the rotation of the second conveying wheels providing the conveying power. In this utility model, the first wire feeder is a single-drive wire feeder, and the second wire feeder is a four-drive wire feeder, thus ensuring sufficient torque and enabling precise control of the end wire feeding speed.
[0014] As a further improvement of this invention, the robot arm has a hollow structure, and the second cable assembly passes through the robot arm and connects to the second wire feeder. In this invention, the second cable assembly passes through the robot arm to prevent it from becoming tangled as the robot arm rotates during use.
[0015] In summary, the beneficial effects of this utility model are as follows: During use, the welding wire can be bent and deformed within the welding wire buffer device, thereby buffering the wire feeding. The detection device can determine the bending radius of the welding wire by detecting its distance from the wire, and the bending radius can be used to determine whether the wire feeding speed increases or decreases. This allows for real-time detection of the wire feeding speed and adjustment as needed. The ultrasonic ranging sensor has high measurement accuracy and can perform closed-loop control of the wire feeding speed. The transparent observation window allows for real-time observation of the welding wire position, facilitating maintenance. The combination of the four-wheel drive second wire feeder and the single-drive first wire feeder in this utility model ensures sufficient torque and precise control of the end-feed speed. Attached Figure Description
[0016] Figure 1 This is a front view of the wire buffer device of Embodiment 1.
[0017] Figure 2 yes Figure 1 AA sectional view.
[0018] Figure 3 This is a bottom view of the wire buffer device in Example 1.
[0019] Figure 4 This is a front view of the robotic welding system of Example 2.
[0020] Figure 5 This is a schematic diagram of the wire feeding structure in the robot welding system of Example 2.
[0021] Figure 6 This is a schematic diagram of the structure of the first wire feeder in Example 2.
[0022] Figure 7 This is a schematic diagram of the second wire feeder in Example 2.
[0023] The components include: 1. Outer shell; 2. Welding wire structure cavity; 3. Welding wire; 4. Detection device; 5. Inner water channel structure cavity; 6. Communication cable structure cavity; 7. First quick-connect interface; 8. Second quick-connect interface; 9. Ultrasonic ranging sensor; 10. Reflector; 11. Flip cover; 12. Observation window; 13. Robot; 14. Second wire feeder; 15. Arm; 16. Robot welding torch; 17. First wire feeder; 18. First cable assembly; 19. Second cable assembly; 20. First conveyor wheel group; 21. First conveyor wheel; 22. Second conveyor wheel group; 23. Second conveyor wheel; 24. Drive gear; 25. Driven gear; 26. Welding power source. Detailed Implementation
[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0025] Example 1
[0026] like Figures 1 to 3 The wire buffer device shown includes a housing 1 and a detection device 4. The housing 1 is mounted on a fixed object in use. For example, when used in a robotic welding system, the housing 1 can be fixed to the robot. A wire structure cavity 2, extending through both ends, is provided inside the housing 1. The wire structure cavity 2 is arc-shaped within the housing 1, with the wire inlet and outlet ends being the wire inlet and outlet ends, respectively. In use, the wire 3 enters the wire structure cavity 2 from the wire inlet end and extends from the wire outlet end, and is fed within the wire structure cavity 2. The width of the wire structure cavity 2 in the plane of its bending direction at both ends is greater than the diameter of the wire, providing the wire 3 with a certain amount of space in the bending radius direction. Thus, the bending radius of the wire 3 can be changed according to the wire feeding speed during feeding, providing buffering for the wire 3 within the housing 1. The wire structure cavity 2 is perpendicular to the plane of its bending direction at both ends. The upward width is slightly larger than the diameter of the welding wire 3. This ensures that when the welding wire 3 is fed into the welding wire structure cavity 2, it can only bend into an arc shape in the plane of the bending direction at both ends of the welding wire structure cavity 2. Furthermore, under the premise that the wire feeding speed of the welding wire 3 remains constant, the bending radius of the welding wire 3 increases with the increase of the wire feeding speed and decreases with the decrease of the wire feeding speed. The welding wire 3 cannot produce a large bend in the direction perpendicular to the aforementioned plane. In this embodiment, the detection device 4 is set inside the outer shell 1 on one side of the arc center of the welding wire structure cavity 2. In this embodiment, a detection device mounting groove communicating with the welding wire structure cavity 2 is opened on the outer shell 1 on one side of the arc center of the welding wire structure cavity 2 for installing the detection device 4. The detection device 4 confirms the increase or decrease of the bending radius of the welding wire 3 by detecting the increase or decrease of the distance between the welding wire 3 and the wire, thereby determining whether the wire feeding speed of the welding wire 3 has increased or decreased.
[0027] like Figure 2As shown, this embodiment is provided with an arc-shaped inner water channel structure cavity 5 and a communication cable structure cavity 6; the inner water channel structure cavity 5 penetrates through both ends of the outer shell 1 and is used to allow cooling water to pass through in the use state, and the communication cable structure cavity 6 penetrates through both ends of the outer shell 1 and is used to allow communication cables to pass through in the use state. The inner water channel structure cavity 5 and the communication cable structure cavity 6 are respectively located on both sides of the welding wire structure cavity 2 and are separated from the welding wire structure cavity 2.
[0028] like Figure 2 As shown, in this embodiment, a first quick-connect interface 7 and a second quick-connect interface 8 are respectively provided at both ends of the outer shell 1. One end of the welding wire structure cavity 2, the inner water channel structure cavity 5, and the communication cable structure cavity 6 are all connected to the first quick-connect interface 7, and the other end of the welding wire structure cavity 2, the inner water channel structure cavity 5, and the communication cable structure cavity 6 are all connected to the second quick-connect interface 8. The first quick-connect interface 7 and the second quick-connect interface 8 are used to connect cable assemblies through which welding wire, cooling water, and communication cables pass. After the cable assembly is connected to the first quick-connect interface 7 and the second quick-connect interface 8, the channels on the cable assembly through which welding wire, cooling water, and communication cables pass are respectively connected to the welding wire structure cavity 2, the inner water channel structure cavity 5, and the communication cable structure cavity 6.
[0029] like Figure 2 As shown, the detection device 4 in this embodiment includes an ultrasonic ranging sensor 9, which is fixed inside the housing 1 and is used to emit ultrasonic waves during use. The emitted ultrasonic waves are reflected back by the welding wire 3 and received by the ultrasonic ranging sensor 9 to determine the distance between the welding wire 3 and the ultrasonic ranging sensor 9. The ultrasonic ranging sensor 9 itself and its use for ranging are existing technologies. In this embodiment, since the position of the ultrasonic ranging sensor 9 is constant, by measuring the distance between the welding wire 3 and the ultrasonic ranging sensor 9, it is possible to determine whether the bending radius of the welding wire 3 increases or decreases, and thus determine whether the wire feeding speed of the welding wire 3 increases or decreases. Therefore, the wire feeding speed of the welding wire 3 can be adjusted in a timely manner.
[0030] like Figure 2 As shown, the detection device 4 in this embodiment also includes a reflector 10, which is attached inside the housing 1. The angle between the length direction of the ultrasonic ranging sensor 9 and the reflective surface of the reflector 10 is α, where 80°≤α≤90°. In this embodiment, the angle α can be set to 80°. The ultrasonic waves emitted by the ultrasonic ranging sensor 9 are reflected by the reflector 10 to the welding wire 3, reflected by the welding wire 3 to the reflector 10, and then reflected back by the reflector 10. The ultrasonic ranging sensor 9 receives the waves and determines the distance between the ultrasonic ranging sensor 9 and the welding wire 3. In this embodiment, because a reflector 10 is provided, the ultrasonic ranging sensor 9 can be set to a radial direction that does not bend along the welding wire 3, thereby saving space in this direction.
[0031] like Figure 3As shown, in this embodiment, a flip cover 11 is provided on the outer shell 1. One side of the flip cover 11 is connected to the outer shell 1 and can be flipped relative to the outer shell 1. For example, one side of the flip cover 11 is hinged to the outer shell 1. An installation hole communicating with the welding wire structure cavity 2 is provided on the outer shell 1. Specifically, the installation hole is communicating with the detection device mounting groove to facilitate the installation of the detection device 4. The flip cover 11 can open or close the installation hole by flipping. When the flip cover 11 is opened, the detection device 4 can be installed or repaired. When the flip cover 11 is closed, the detection device 4 can be sealed inside the outer shell 1. The side of the flip cover 11 away from its rotatable connection with the outer shell 1 can cooperate with the outer shell 1. Specifically, a magnet can be provided on the outer shell 1, and a magnet can also be fixedly provided on the flip cover 11. When the flip cover 11 is flipped to close the installation hole, the magnetic poles of the magnets on the outer shell 1 and the flip cover 11 are opposite. The mutual attraction of the magnets realizes the fixation of the flip cover 11 with the outer shell 1 when the installation hole is closed.
[0032] like Figure 3 As shown, in order to facilitate intuitive observation of the position of the welding wire 3, this embodiment is provided with an observation window 12. The observation window 12 is made of transparent material and fixed on the flip cover 11, so as to observe the position of the welding wire 3 through the transparent observation window 12 without opening the flip cover 11.
[0033] Example 2
[0034] The robotic welding system of this embodiment, such as Figure 4 and Figure 5 As shown, the robotic welding system includes a robot 13, a second wire feeder 14, a robotic welding torch 16, a first wire feeder 17, and a wire buffer device as described in Embodiment 1. The second wire feeder 14 is mounted on the arm 15 of the robot 13, the robotic welding torch 16 is mounted on the second wire feeder 14, and the wire buffer device is fixed to the robot 13. In this embodiment, the outer shell 1 of the wire buffer device is detachably mounted on the robot 13 using at least two bolts. The wire inlet end of the wire buffer device is connected to the first wire feeder 17 by a first cable assembly 18, wherein the first wire feeder 17 is mounted on the base of the robot 13. The wire outlet end of the wire buffer device is connected to the second wire feeder 14 by a second cable assembly 19. The welding wire 3 passes sequentially through the first wire feeder 17, the wire buffer device, and the second wire feeder 14 into the robotic welding torch 16. The first wire feeder 17 is used to feed the welding wire 3 into the wire buffer device, and the second wire feeder 14 is used to feed the welding wire 3 into the robotic welding torch 16.
[0035] like Figure 6As shown, in this embodiment, the first wire feeder 17 includes a first wire feeding frame (not shown), a first drive motor (not shown), and a first conveying wheel assembly 20 mounted on the first wire feeding frame. The first conveying wheel assembly 20 includes two first conveying wheels 21, one upper and one lower. The upper first conveying wheel 21 is connected to the first drive motor and is driven to rotate by the first drive motor. The welding wire passes between the two first conveying wheels 21. The first drive motor drives the first conveying wheel 21 to rotate, providing power for the feeding of the welding wire 3. In this embodiment, the first wire feeder 17 is a single-drive structure with speed control. Figure 7 As shown, the second wire feeder 14 includes a second wire feed frame (not shown), a second drive motor (not shown), and two second conveying wheel sets 22 arranged side by side on the second wire feed frame. Each second conveying wheel set 22 includes two upper and lower second conveying wheels 23, both driven to rotate by the second drive motor. The two second conveying wheels 23 rotate in opposite directions. The welding wire passes between the two second conveying wheels 23, and the rotation of the second conveying wheels 23 provides the conveying power. In this embodiment, each second conveying wheel 23 is coaxially equipped with a driven gear 25. A drive gear 24 is provided on the second wire feeding frame between the two second conveying wheel sets 22. The driven gear 25, which is coaxial with one of the second conveying wheels 23 above the two second conveying wheel sets 22, is located on both sides of the drive gear 24 and meshes with the drive gear 24. The driven gears 25, which are coaxial with the two second conveying wheels 23 above and below the second conveying wheel set 22, mesh with each other. The drive gear 24 is connected to the second drive motor. Thus, in this embodiment, all four second conveying wheels 25 of the second conveying wheel set 22 are drive wheels. The second wire feeder 14 in this embodiment is a four-wheel drive structure with torque control.
[0036] In this embodiment, the arm 15 of the robot 13 has a hollow structure, and the second cable assembly 19 passes through the hollow arm 15 of the robot 13 and connects to the second wire feeder 14.
[0037] In this embodiment, the second wire feeder 14 directly feeds the welding wire 3 to the robot welding gun 16. Since the welding speed of the robot welding gun 16 is set to remain constant when welding a specific workpiece, the speed at which the second wire feeder 14 feeds the welding wire 3 to the robot welding gun 16 remains constant. Therefore, the wire feeding speed of the wire buffer device remains constant. Thus, it is necessary to control the wire feeding speed of the first wire feeder 17 to the wire buffer device. In this embodiment, when the wire feeding speeds of the first wire feeder 17 and the second wire feeder 14 are equal, the bending radius of the welding wire 3 within the welding wire structure cavity 2 is R, where R is a positive number. At this time, the detection device 4 of the welding wire buffer device detects a distance L between itself and the welding wire 3, where L is a positive number and L < R. When the bending radius of the welding wire 3 within the welding wire structure cavity 2 increases to R1 (R1 > R), the detection device 4 detects a distance L1 between the welding wire 3 and the detection device 4 that increases to L1 (L1 > L). At this time, the wire feeding speed of the first wire feeder 17 is greater than the wire feeding speed of the second wire feeder 14, and the wire feeding speed at the wire inlet end of the welding wire buffer device is greater than the wire outlet speed at the wire outlet end. The first wire feeder 17 can be controlled to reduce its wire feeding speed until the detection device 4 detects a distance between the welding wire 3 and the detection device. The distance between the two devices is L. When the bending radius of the welding wire 3 in the welding wire structure cavity 2 decreases to R2 (R2 is a positive number and R2 < R), the detection device 4 detects that the distance between the welding wire 3 and the detection device 4 has decreased to L2 (L2 is a positive number and L2 < L). At this time, the wire feeding speed of the first wire feeder 17 is less than the wire feeding speed of the second wire feeder 14, and the wire feeding speed at the wire inlet end of the welding wire buffer device is less than the wire outlet speed at the wire outlet end. The first wire feeder 17 can be controlled to increase its wire feeding speed until the detection device 4 detects that the distance between the welding wire 3 and the detection device 4 is L. This allows the welding wire 3 in this embodiment to be transported in the middle position of the welding wire structure cavity 2 in the welding wire buffer device, thereby achieving precise control of the wire feeding speed of the welding wire 3, reducing arc breakage, and improving welding stability.
[0038] In this embodiment, a display can be connected to the ultrasonic ranging sensor 9 to display the distance between the welding wire 3 and the detection device 4 detected by the detection device 4, and the wire feeding speed of the first wire feeder 17 can be manually controlled according to the detected distance. Alternatively, the ultrasonic ranging sensor 9 can be connected to the control system signal of the robot welding system, and the control system of the robot welding system can control the wire feeding speed of the first wire feeder 17 according to the distance between the welding wire 3 and the detection device 4 detected by the detection device 4, so as to ensure that the wire feeding speed of the first wire feeder 17 is equivalent to the wire feeding speed of the second wire feeder 14.
[0039] Unless otherwise specified in the above description, all parts are existing technology or can be implemented using existing technology. Furthermore, the specific embodiments described in this utility model are merely preferred embodiments of the invention and are not intended to limit the scope of this utility model. That is, all equivalent changes and modifications made within the scope of this utility model patent should be considered within the technical scope of this utility model.
Claims
1. A welding wire buffer apparatus characterized by: include The outer casing is installed on a fixed object in use. Inside the outer casing, there is a wire structure cavity that extends through both ends. The wire structure cavity is arc-shaped inside the outer casing, with the wire inlet end and the wire outlet end at its two ends, respectively. In use, the welding wire enters the wire structure cavity from the wire inlet end and extends out of the wire structure cavity from the wire outlet end. When the welding wire is fed in the wire structure cavity, it is bent into an arc shape, and the bending radius of the welding wire increases or decreases with the increase or decrease of the wire feeding speed. The detection device is located inside the housing on one side of the arc center of the welding wire structure cavity. The detection device determines whether the bending radius of the welding wire increases or decreases by detecting the increase or decrease of the distance between the welding wire and the wire, and is used to determine whether the wire feeding speed increases or decreases.
2. The welding wire buffer apparatus of claim 1, wherein: Also includes The internal water channel structure cavity extends through both ends of the outer shell and is used to allow cooling water to pass through during use; The communication cable structure cavity extends through both ends of the outer shell and is used to allow the communication cable to pass through during use. The internal waterway structure cavity and the communication cable structure cavity are respectively located on both sides of the welding wire structure cavity and are separated from the welding wire structure cavity.
3. The welding wire buffer device according to claim 2, characterized in that: A first quick-connect interface and a second quick-connect interface are respectively provided at both ends of the outer shell. One end of the welding wire structure cavity, the inner water channel structure cavity and the communication cable structure cavity are all connected to the first quick-connect interface, and the other end of the welding wire structure cavity, the inner water channel structure cavity and the communication cable structure cavity are all connected to the second quick-connect interface. The first quick-connect interface and the second quick-connect interface are used to connect the cable assembly through which the welding wire, cooling water and communication cable pass.
4. The welding wire buffer device according to claim 1, characterized in that: The detection device includes an ultrasonic ranging sensor, which is fixed inside the housing and is used to emit ultrasonic waves during use and receive ultrasonic waves reflected back by the welding wire to determine the distance between itself and the welding wire.
5. The welding wire buffer device according to claim 4, characterized in that: The detection device also includes a reflector, which is fixed inside the housing. The angle between the longitudinal direction of the ultrasonic ranging sensor and the reflective surface of the reflector is α, where 80°≤α≤90°. The ultrasonic waves emitted by the ultrasonic ranging sensor are reflected by the reflector to the welding wire, and then reflected by the welding wire back to the reflector. They return along the original path and are received by the ultrasonic ranging sensor to determine the distance between the ultrasonic ranging sensor and the welding wire.
6. The welding wire buffer apparatus of claim 1, wherein: Also includes The flip cover is connected to the outer shell on one side and can be flipped relative to the outer shell. The outer shell has a mounting hole that communicates with the welding wire structure cavity. Flipping the flip cover can open or close the mounting hole. The side of the flip cover away from its rotatable connection with the outer shell can cooperate with the outer shell.
7. The welding wire buffer device according to claim 6, characterized in that: It also includes an observation window, which is made of transparent material and fixed to the flip cover, for observing the position of the welding wire without opening the flip cover.
8. Robotic welding systems, including robot; A second wire feeder is mounted on the robot's arm; Robotic welding torch, which is mounted on the second wire feeder; characterized in that Also includes First wire feeder; The wire buffer device as described in any one of claims 1 to 7 is fixed to the robot. The wire inlet end of the wire buffer device is connected to the first wire feeder via a first cable assembly, and the wire outlet end of the wire buffer device is connected to the second wire feeder via a second cable assembly. The welding wire passes sequentially through the first wire feeder, the wire buffer device, and the second wire feeder into the robot welding gun. The first wire feeder is used to feed the welding wire into the wire buffer device, and the second wire feeder is used to feed the welding wire into the robot welding gun.
9. The robotic welding system according to claim 8, characterized in that: The first wire feeder includes a first wire feed frame, a first drive motor, and a first conveyor wheel assembly mounted on the first wire feed frame. The first conveyor wheel assembly includes two first conveyor wheels, one of which is connected to the first drive motor. The welding wire passes between the two first conveyor wheels, and the first drive motor drives the first conveyor wheel to rotate to provide power for the wire feeding. The second wire feeder includes a second wire feed frame, a second drive motor, and two second conveyor wheel sets arranged in parallel on the second wire feed frame. Each second conveyor wheel set includes two second conveyor wheels, both of which are driven to rotate by the second drive motor. The two second conveyor wheels in the second conveyor wheel set rotate in opposite directions. The welding wire passes between the two second conveyor wheels and is powered by the rotation of the second conveyor wheels.
10. The robotic welding system according to claim 9, characterized in that: The robot's arm has a hollow structure, and the second cable assembly passes through the robot's arm and connects to the second wire feeder.