An anti-spatter device and method for welding sensors

Abstract

The present invention discloses a splash-proof device and method for welding sensors, which includes a base with a lens light outlet hole and a laser light outlet hole; on the inner side of the base of the lens light outlet hole and the laser light outlet hole, there are a lens baffle and a laser baffle, and a rocker and a swing rod are arranged between the lens baffle and the laser baffle; the swing rod is meshed with the output shaft gear of the servo motor, and the swing rod drives the rocker to rotate, which is converted into the reciprocating linear motion of the lens baffle and the laser baffle in the base, so as to realize the opening and closing of the lens light outlet hole and the laser light outlet hole. This device has the characteristics of compact structure, small occupied space and self-cleaning. During the use of the laser weld sensor, it can effectively block the influence of splashing welding slag particles on the welding sensor. And this structure can be applied to occasions that require lens protection such as line structured light laser sensors, surface structured light laser sensors, binocular sensors, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of laser weld sensors for robots, and particularly relates to a splash-proof device and method for a laser weld sensor of a robot welding torch. Background Art

[0002] In the field of welding robots, as an important component, a laser weld sensor has the functions of weld identification and detection, obtains weld position information, transmits it to the robot, and guides the robot to perform accurate welding. However, during the welding process, a large amount of welding slag splashes and soot are generated. Long-term welding will cause a large number of welding slag particles to adhere to the surface of the optical window protection lens at the front end of the unprotected sensor and it is difficult to clean, affecting the weld detection accuracy. It is necessary to manually replace the optical window protection lens frequently to ensure the normal operation of the sensor, which consumes a lot of man-hours and has a high cost.

[0003] CN 109702395 A discloses a splash-proof component form that uses a pneumatic component to execute a baffle flip. This structural form requires a large space for the baffle to flip, and when the laser sensor is close to the welding torch, there is a risk of collision between the baffle and the welding torch and between the baffle and the welding workpiece. After long-term welding use, a large amount of welding slag particles will adhere to the baffle and need to be cleaned manually. Therefore, it is particularly important to design a splash-proof device for a laser weld sensor with a compact structure, small occupied space, and self-cleaning baffle. Summary of the Invention

[0004] To solve the above-mentioned defects in the prior art, the purpose of the present invention is to provide a splash-proof device for a welding sensor, which has a compact structure and small occupied space, and can effectively block the impact of splashing welding slag particles on the welding sensor during the use of the laser weld sensor. Moreover, this structure can be applied not only to line-structured light laser sensors, but also to surface-structured light laser sensors, binocular sensors and other occasions that require lens protection.

[0005] The present invention is achieved by the following technical solutions.

[0006] The present invention provides a splash-proof device for a welding sensor, which includes a base, a cover plate, a crank, a swing rod, a lens baffle and a laser baffle; a first lens light outlet hole and a first laser light outlet hole are opened on the base; a lens baffle and a laser baffle are provided on the inner side of the base at the first lens light outlet hole and the first laser light outlet hole, and a crank and a swing rod are provided between the lens baffle and the laser baffle;

[0007] The swing rod meshes with the output shaft gear of the servo motor, and the swing rod drives the crank to rotate, which is converted into a reciprocating linear motion of the lens baffle and the laser baffle in the base, thereby realizing the opening and closing of the first lens light outlet hole and the first laser light outlet hole.

[0008] As a further preference, the first lens light exit hole and the first laser light exit hole on the base are respectively arranged on both sides, and a first pin fixing hole for connecting the lens baffle, a crank handle mounting hole for connecting the crank handle, and a second pin fixing hole for connecting the laser baffle are provided on the base between the first lens light exit hole and the first laser light exit hole.

[0009] As a further preference, the crank handle is in the shape of an elongated strip, a rocker arm mounting groove is provided on the crank handle, and the rocker arm is connected to the upper surface of the crank handle.

[0010] As a further preference, the lens baffle is a gun handle-shaped structure, and is provided with a first long strip pin sliding groove and a first waist-shaped cylindrical sliding groove arranged in parallel.

[0011] As a further preference, the laser baffle is in an L-shape arranged in reverse, and a second long strip-shaped pin sliding groove and a second waist-shaped cylindrical sliding groove arranged in parallel are provided on the L-shaped surface.

[0012] As a further preference, two cylinders and a cylindrical boss are provided at the bottom of the crank handle, and the two cylinders respectively cooperate with the first cylindrical sliding groove of the lens baffle and the second cylindrical sliding groove of the laser baffle; the cylindrical boss is installed in the mounting hole of the base crank handle.

[0013] As a further preference, the cover plate is provided with an arc-shaped slot, a second lens light exit hole and a second laser light exit hole, and the second lens light exit hole and the second laser light exit hole correspond in size and position to the first lens light exit hole and the first laser light exit hole respectively.

[0014] The present invention also provides a method for preventing splashing of a welding sensor using the device, comprising:

[0015] The servo drives the rocker arm to rotate, and then drives the crank to rotate synchronously; the lens baffle and the laser baffle are respectively pushed to both sides by the rotation of the crank, and the lens baffle and the laser baffle respectively reciprocate along the cylindrical sliding groove to realize the opening and closing of the lens light outlet hole and the laser light outlet hole.

[0016] The present invention adopts the above technical solution, which has the following beneficial effects:

[0017] 1) The rotation of the servo drives the swing of the crank, which is converted into a structural form in which the lens cover and the laser cover move horizontally to open and close; during the welding process, the cover is closed, which can effectively prevent the welding slag from adhering to the lens surface, greatly reducing the replacement of the sensor light window protection lens.

[0018] 2) The baffle is installed in the translational opening and closing mechanism inside the base, which has a compact structure, occupies a small space, is easy to assemble, and the internal opening and closing structure eliminates the hidden dangers of collision between the baffle and the welding gun, and between the baffle and the welding workpiece.

[0019] 3) A translation and opening / closing mechanism with a baffle installed inside the base. The shearing motion form between the baffle and the substrate can remove the welding slag adhering to the baffle at any time, playing a self-cleaning role. It effectively prevents the splashed welding slag from accumulating on the baffle for a long time. Brief Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 is a schematic diagram of the base structure of the present invention;

[0024] Figure 4 is a schematic diagram of the lens baffle structure of the present invention;

[0025] Figure 5 is a schematic diagram of the laser baffle structure of the present invention;

[0026] Figure 6 is a schematic diagram of the crank structure of the present invention;

[0027] Figure 7 is a schematic diagram of the cover plate structure of the present invention.

[0028] In the figure, 1. Base, 2. Cover plate, 3. Crank, 4. Swing rod, 5. Pin, 6. Lens baffle, 7. Laser baffle, 101, 103. First and second pin fixing holes, 102. Crank mounting hole, 104. First lens light outlet hole, 105. First laser light outlet hole, 106. First screw through hole, 107. Threaded hole, 201. Arc-shaped slot hole, 202. Second lens light outlet hole, 203. Second laser light outlet hole, 204. Pin mounting hole, 205. Second screw through hole, 301. Cylindrical boss, 302, 303. First and second cylinders, 304. Swing rod mounting groove, 601. First cylindrical sliding groove, 602. First pin sliding groove, 701. Second cylindrical sliding groove, 702. Second pin sliding groove. Detailed Embodiment

[0029] The present invention will be described in detail below in conjunction with the drawings and specific embodiments. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute a limitation to the present invention.

[0030] As Figure 1 , Figure 2As shown in the figure, an anti-spatter device for welding sensors provided by an embodiment of the present invention includes a base 1, a cover plate 2, a crank 3, a swing rod 4, a pin 5, a lens shutter 6 and a laser shutter 7; a first lens light outlet hole 104 and a first laser light outlet hole 105 are formed on the base 1; a lens shutter 6 and a laser shutter 7 are arranged on the inner side of the base 1 at the first lens light outlet hole 104 and the first laser light outlet hole 105, and a crank 3 and a swing rod 4 are arranged between the lens shutter 6 and the laser shutter 7; the swing rod 4 meshes with the output shaft gear of the servo motor, drives the crank 3 to rotate, and is converted into a reciprocating linear motion of the lens shutter 6 and the laser shutter 7 in the base 1, so as to realize the opening and closing of the first lens light outlet hole 104 and the first laser light outlet hole 105.

[0031] As Figure 3 shown in the figure, the base 1 is the anti-spatter device assembly, and two through holes are formed on it and are respectively arranged on both sides as the first lens light outlet hole 104 and the first laser light outlet hole 105, and the first lens light outlet hole 104 and the first laser light outlet hole 105 are respectively arranged on both sides of the base 1; a sunk groove is formed on the rear end face of the base 1 for installing the remaining structural parts, and three sunk holes and four threaded holes 107 are formed inside the sunk groove. The three sunk holes are respectively a first pin fixing hole 101, a crank mounting hole 102 and a second pin fixing hole 103, and are arranged on the base 1 between the first lens light outlet hole 104 and the first laser light outlet hole 105; the first pin fixing hole 101 is connected to the lens shutter 6, the crank mounting hole 102 is connected to the crank 3, and the second pin fixing hole 103 is connected to the laser shutter 7. The three sunk holes respectively cooperate with two pins 5 and the cylindrical boss 301 on the lower surface of the crank 3, and the four first screw through holes 106 on the front end face are connected and fixed to the laser weld sensor body by screws.

[0032] The crank 3 is strip-shaped, and a swing rod mounting groove 304 is arranged on the crank 3, and the swing rod 4 is connected to the upper surface of the crank 3.

[0033] As Figure 4 shown in the figure, the lens shutter 6 is in the shape of a pistol grip, and long strip-shaped first pin sliding grooves 602 and kidney-shaped first cylindrical sliding grooves 601 are arranged in parallel on the lens shutter.

[0034] As Figure 5 shown in the figure, the laser shutter 7 is in an L shape arranged in reverse, and long strip-shaped second pin sliding grooves 702 and kidney-shaped second cylindrical sliding grooves 701 are arranged in parallel on the L-shaped surface.

[0035] As Figure 6As shown in the figure, the bottom of the crank handle is provided with first and second cylinders 302, 303 and a cylindrical boss 301. One first pin sliding groove 602 and one second pin sliding groove 702 are respectively formed on the lens shutter 6 and the laser shutter 7, and the first pin sliding groove 602 and the second pin sliding groove 702 are respectively connected to the pin 5. The first and second cylinders 302, 303 on the lower surface of the crank handle 3 are respectively connected to the first cylindrical sliding groove 601 of the lens shutter 6 and the second cylindrical sliding groove 701 of the laser shutter 7, and the middle cylindrical boss 301 is fitted with the crank handle mounting hole 102 in the base; the self-rotation of the crank handle 3 is converted into the reciprocating linear motion of the lens shutter 6 and the laser shutter 7 driven by the first and second cylinders 302, 303 inside the base 1, and a counterbore is formed on the upper surface of the crank handle 3 to cooperate with the swing rod 4.

[0036] As Figure 7 As shown in the figure, the cover plate 2 is the fixed end face of the anti-spray device, and two through holes corresponding to the base 1 are formed thereon, namely the second lens light outlet hole 202 and the second laser light outlet hole 203, and an arc-shaped slot hole 201 for cooperating with the crank handle 3. The second lens light outlet hole 202 and the second laser light outlet hole 203 respectively correspond to the first lens light outlet hole 104 and the first laser light outlet hole 105 in terms of size and position. It also includes two pin mounting holes 204 for cooperating with the pin 5, and four second screw through holes 205 fixed to the base by screws.

[0037] The swing rod 4 has a toothed hole and meshes with the steering gear that realizes rotation. One or more through holes are formed thereon and are fixedly connected to the crank handle 3 by screws to transmit the rotation of the output shaft of the steering gear to the crank handle. Then, the cover plate 2 is installed inside the base 1 so that the upper and lower arc surfaces of the crank handle 3 cooperate with the arc-shaped slot hole 201, and the pin mounting holes 204 are respectively aligned with the first and second pin fixing holes 101 and 103. The pin 5 is passed through the pin mounting hole 204 and fixed at the first and second pin fixing holes 101 and 103 inside the base 1, and the countersunk head screws are passed through the second screw through holes 205 and tightened and fixed with the threaded holes 107 on the base 1. Finally, the swing rod 4 is installed inside the crank handle 3 and tightened and fixed with screws.

[0038] At the same time, it is fixed to the laser weld sensor body through four first screw through holes 106. The lens shutter 6 is installed inside the base 1 so that the center of the first pin sliding groove 602 is on the same straight line as the center of the first pin fixing hole 101. The laser shutter 7 is similarly installed inside the base 1 so that the center of the second pin sliding groove 702 is on the same straight line as the center of the second pin fixing hole 103. Then, the cylindrical boss 301 on the crank handle 3 is installed inside the crank handle mounting hole 102 of the base 1, and one end cylinder 302 is fitted with the first cylindrical sliding groove 601 on the lens shutter 6, and the other end cylinder 303 is fitted with the second cylindrical sliding groove 701 on the laser shutter 7 to block the splashing welding slag.

[0039] During operation, the gear on the output shaft of the servo motor meshes with the toothed hole inside the swing rod 4. The swing rod 4 drives the crank 3 to rotate together. By means of the cooperation between the first and second cylinders 302 and 303 and the first cylindrical sliding grooves 601 of the lens shutter 6 and the second cylindrical sliding grooves 701 of the laser shutter 7 respectively, the rotation of the crank 3 is converted into the reciprocating linear motion of the lens shutter 6 and the laser shutter 7 inside the base 1, thereby realizing the opening and closing functions of the first lens light outlet hole 104 and the first laser light outlet hole 105. When the laser weld sensor is working, the light outlet hole is opened by controlling the servo motor, and the sensor collects weld information. When welding is required, the light outlet hole is closed to prevent the splashed welding slag particles and soot from hitting the front light window protection lens of the sensor and affecting its function.

[0040] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A splash-proof device for welding sensors, characterized in that, The invention comprises a base (1), a cover plate (2), a crank handle (3), a swing arm (4), a lens baffle (6) and a laser baffle (7); the base (1) is provided with a first lens light exit hole (104) and a first laser light exit hole (105); the base (1) is provided with a lens baffle (6) and a laser baffle (7), the lens baffle (6) and the laser baffle (7) are located on the inner sides of the first lens light exit hole (104) and the first laser light exit hole (105), and the crank handle (3) and the swing arm (4) are provided between the lens baffle (6) and the laser baffle (7); The lens baffle (6) is a gun handle-shaped structure, and is provided with a long first pin sliding groove (602) and a waist-shaped first cylindrical sliding groove (601) arranged in parallel. The laser baffle (7) is in the shape of an L arranged in reverse, and a second long strip-shaped pin sliding groove (702) and a second waist-shaped cylindrical sliding groove (701) arranged in parallel are provided on the L-shaped surface; The crank handle (3) is in the shape of an elongated strip, a rocker rod mounting groove (304) is provided on the crank handle (3), and the rocker rod (4) is connected to the upper surface of the crank handle (3); The swing rod (4) is meshed with the steering gear output shaft gear, the steering gear drives the swing rod (4) to rotate, the swing rod (4) drives the crank (3) to rotate, the lens baffle (6) and the laser baffle (7) are respectively pushed to the sides by the rotation of the crank (3), and the rotation of the crank (3) is converted into a reciprocating linear motion of the lens baffle (6) and the laser baffle (7) in the base (1), thereby realizing the opening and closing of the first lens light exit hole (104) and the first laser light exit hole (105); the shearing motion of the laser baffle (7) and the base (1) prevents spatter welding slag from adhering to and accumulating on the laser baffle (7).

2. The anti-spatter device for welding sensors according to claim 1, characterized in that, The first lens light exit hole (104) and the first laser light exit hole (105) on the base (1) are respectively arranged on two sides, and a first pin fixing hole (101) connected to the lens baffle (6), a crank mounting hole (102) connected to the crank (3), and a second pin fixing hole (103) connected to the laser baffle (7) are provided on the base (1) between the first lens light exit hole (104) and the first laser light exit hole (105).

3. The anti-spatter device for welding sensors according to claim 1, characterized in that, The bottom of the crank handle (3) is provided with two cylinders and a cylindrical boss (301), and the two cylinders respectively cooperate with a first cylindrical sliding groove (601) of the lens baffle (6) and a second cylindrical sliding groove (701) of the laser baffle (7); the cylindrical boss (301) is installed in the crank handle installation hole (102) of the base (1).

4. A splash-proof device for welding a sensor according to claim 1, characterized in that, The cover plate (2) is provided with an arc-shaped slot hole (201), a second lens light exit hole (202) and a second laser light exit hole (203); the second lens light exit hole (202) and the second laser light exit hole (203) respectively correspond in size and position to the first lens light exit hole (104) and the first laser light exit hole (105).

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