weld seam tracking sensor

Abstract

The application provides a welding seam tracking sensor and belongs to the technical field of sensors, which alleviates the problem of reduced detection performance of the sensor. The welding seam tracking sensor comprises a sensor shell, a protective cover and a protective sheet. The protective cover is installed at the bottom of the sensor shell, the upper surface of the protective cover is provided with an air inlet, the bottom of the sensor shell is provided with a gas blowing hole, and the air inlet is in sealed connection with the gas blowing hole. The bottom of the protective cover is formed with a visual hole and a laser hole, a transverse slot is formed in the protective cover, a socket is formed in the side wall of the protective cover, the protective sheet is inserted into the slot through the socket, an air duct is formed between the lower surface of the protective sheet and the protective cover, and the air inlet is in communication with the air duct. The sweeping gas is blown out from the gas blowing hole, enters the air duct through the air inlet, and is discharged from the visual hole and the laser hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a weld tracking sensor. BACKGROUND

[0002] The weld tracking sensor is mainly applied to the fields of welding and grinding, and is used for detecting the position and width of a weld. Since welding produces a large amount of welding fume and splashes, which are not conducive to sensor detection, the welding fume and splashes will adhere to the protective lens of the sensor, shielding the laser emission and image acquisition of the sensor, so it is necessary to blow the welding fume away from the protective lens to prolong the service life of the protective lens.

[0003] As shown in Figure 1 The existing blowing method forms an air channel between the window protective sheet 101 and the mounting cover 102, and a gas hole 103 is needed to be formed on the window protective sheet 101. The gas for blowing enters into the air channel below the window protective sheet from above the window protective sheet through the gas hole 103 of the window protective sheet 101, and is discharged from the laser hole 104 and the visual hole 105 of the mounting cover 102.

[0004] Because the blowing gas cannot be completely filtered, it contains a small amount of water and oil. When the blowing gas is blown out from the gas port 107 in the shell 106, a part of the gas will enter into the cavity formed by the laser window sheet 108, the visual window sheet 109 and the window protective sheet 101 along the gap between the window protective sheet 101 and the shell 106. The water and oil in the gas will adhere to the surfaces of the laser window sheet 108 and the visual window sheet 109, causing the laser structure light to scatter and the sensor imaging to be blurred, thereby affecting the detection performance of the sensor and causing the problem of reduced detection performance of the sensor. SUMMARY

[0005] The present application aims to provide a weld tracking sensor, which alleviates the problem of reduced detection performance of the sensor.

[0006] The present application provides a weld tracking sensor, which comprises a sensor shell, a protective cover and a protective sheet.

[0007] The protective cover is installed at the bottom of the sensor shell, the upper surface of the protective cover is provided with an air inlet, the bottom of the sensor shell is provided with a blowing hole, and the air inlet is in sealed connection with the blowing hole.

[0008] The bottom of the protective cover is formed with a visual hole and a laser hole, a transverse slot is formed in the protective cover, a socket is formed in the side wall of the protective cover, the protective sheet is inserted into the slot through the socket, an air duct is formed between the lower surface of the protective sheet and the protective cover, and the air inlet is in communication with the air duct.

[0009] The purge gas is blown out from the blowing hole, enters the air duct through the air inlet, and is discharged from the visual hole and the laser hole.

[0010] Further, a gap is formed between the upper edge of the visual hole and the laser hole and the lower surface of the protective sheet.

[0011] Further, the outer wall of the visual hole and the laser hole is formed with a gas flow guiding slope.

[0012] Further, a top bead is mounted on the protective cover, and when the protective sheet is inserted into the insertion slot, the top bead presses the lower surface of the protective sheet.

[0013] Further, the bottom of the sensor shell is provided with a sheet pressing boss, and when the protective sheet is inserted into the insertion slot, the sheet pressing boss presses the upper surface of the protective sheet.

[0014] Further, the sheet pressing boss is formed with an insertion guiding slope in the insertion direction of the protective sheet.

[0015] Further, the bottom of the sensor shell is provided with a micro touch switch, and the micro touch switch is electrically connected with the circuit in the sensor shell.

[0016] When the protective sheet is inserted into the insertion slot, the upper surface of the protective sheet presses the micro touch switch, so that the micro touch switch is closed, and the insertion of the protective sheet is detected.

[0017] Further, the micro touch switch is formed with a contact guiding slope in the insertion direction of the protective sheet.

[0018] Further, the lower surface of the insertion slot is formed with two guiding bosses protruding upward, and the distance between the two guiding bosses is greater than the opening size of the visual hole and the laser hole, so as to avoid scratching the protective sheet.

[0019] Further, the sensor shell is provided with an adjusting valve, and the adjusting valve is used to adjust the gas volume of the purge gas.

[0020] The weld tracking sensor provided by the present application comprises a sensor shell, a protective cover and a protection sheet, the protective cover is installed at the bottom of the sensor shell, the air inlet of the protective cover is in sealing connection with the air blowing hole at the bottom of the sensor shell, the protection sheet is inserted into the insertion slot of the protective cover, and the air duct is formed between the lower surface of the protection sheet and the protective cover. When the purging operation is performed, the purging gas is blown out from the air blowing hole, enters the air duct through the air inlet, and is discharged from the visual hole and the laser hole. Because the air duct is located below the protection sheet, the purging gas cannot flow above the protection sheet, and if the purging gas contains water and oil, the visual window sheet and the laser window sheet above the protection sheet cannot be splashed, thereby relieving the problem of reduced sensor detection performance. At the same time, when the protection sheet is inserted into the insertion slot of the protective cover, the micro-touch switch at the lower end of the sensor shell is pressed to be closed, the internal circuit of the shell connected with the micro-touch switch is powered on, and the sensor can normally work, thereby preventing the sensor from being damaged due to forgetting to insert the protection sheet. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0022] Figure 1 It is a schematic diagram of the purging gas structure of the existing weld tracking sensor.

[0023] Figure 2 It is an explosion schematic diagram of the weld tracking sensor provided by the embodiment of the present application.

[0024] Figure 3 It is a top view of the protective cover and the protection sheet in the embodiment of the present application.

[0025] Figure 4 It is Figure 3 It is a sectional view along the line A-A.

[0026] Figure 5 It is a schematic diagram of the air flow direction of the embodiment of the present application.

[0027] Figure 6 It is another schematic diagram of the weld tracking sensor provided by the embodiment of the present application.

[0028] Figure 7 It is a schematic diagram of the insertion slot in the embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] The terms "comprising" and "having" and any variations thereof mentioned in the embodiments of the present application are intended to cover the inclusions not exclusively. For example, the processes, methods, systems, products or devices comprising a series of steps or units are not limited to the listed steps or units, but optionally further comprise other steps or units not listed, or optionally further comprise other steps or units inherent to the processes, methods, products or devices.

[0031] As shown in Figures 2 to 7 The present embodiment provides a weld tracking sensor, which comprises a sensor housing 1, a protective cover 2 and a protective sheet 3 (also referred to as a window protective sheet). The protective cover 2 is installed at the bottom of the sensor housing 1, the upper surface of the protective cover 2 is provided with an air inlet 21, the bottom of the sensor housing 1 is provided with a blowing hole 11, and the air inlet 21 is in sealing connection with the blowing hole 11. In the present embodiment, the protective cover 2 is installed at the bottom of the sensor housing 1 by four screws 5, and the air inlet 21 and the blowing hole 11 form a sealed air passage through a sealing ring 10.

[0032] The bottom of the protective cover 2 is formed with a visual hole 22 and a laser hole 23, and the protective cover 2 is formed with a transverse slot inside. The sidewall of the protective cover 2 is provided with a socket 24, the protective sheet 3 is inserted into the slot through the socket 24, and the lower surface of the protective sheet 3 and the protective cover 2 form an air duct 40, and the air inlet 21 is in communication with the air duct 40.

[0033] As shown in Figure 5 When the purging operation is performed, the purging gas enters the sensor housing 1 from the inlet 140, is blown out from the blowing hole 11, enters the air duct 40 through the air inlet 21, and is discharged from the visual hole 22 and the laser hole 23. Because the air duct 40 is located below the protective sheet 3, the purging gas cannot flow above the protective sheet 3, and if the purging gas contains moisture and oil, it also cannot adhere to the upper surface of the protective sheet 3, nor can it adhere to the visual window sheet 12 and the laser window sheet 13 above the protective sheet 3, thereby alleviating the problem of reduced sensor detection performance.

[0034] As shown in Figure 4As shown, in one possible implementation, a slit 41 is formed between the upper edges of the vision hole 22 and the laser hole 23 and the lower surface of the protective plate 3. When the protective plate 3 is inserted, the inner cavity of the protective cover 2 is open, and the outlet of the vision hole 22 and the laser hole 23 is the slit 41. The protective plate 3 and the inner cavity of the protective cover 2 form a nearly sealed air duct 40. When the airflow flows through the slit 41 in the inner cavity of the protective cover 2, it is compressed to form a structure similar to an air knife. The gas can more forcefully blow the lower surface of the protective plate 3, making it more difficult for welding spatter and fumes to adhere to the lower surface of the protective plate 3, extending the service life of a single protective plate 3, reducing the frequency of replacing the protective plate 3, and saving material and labor costs.

[0035] In one possible implementation, the outer walls of the vision aperture 22 and the laser aperture 23 are formed with airflow guiding slopes. The airflow guiding slopes can better allow gas to enter the slit 41 to compress the gas, reduce gas convection in the cavity, and utilize the force of gas rising and compression to make the protective sheet 3 stick tightly to the lower surface of the sensor housing 1, thus better protecting the laser window sheet 13 and the vision window sheet 12.

[0036] In one possible implementation, a regulating valve 14 is provided on the sensor housing 1. The regulating valve 14 is connected to the air passage inside the sensor housing 1 and is used to regulate the amount of purging gas. During the purging operation, the amount of air output from the lower air hole 11 can be adjusted by the regulating valve 14 according to actual needs, thereby controlling the purging effect.

[0037] In one possible implementation, a top bead 25 is installed on the protective cover 2. When the protective plate 3 is inserted into the slot, the top bead 25 presses against the lower surface of the protective plate 3, providing upward pressure to the protective plate 3.

[0038] like Figure 6 As shown, in one possible implementation, a pressure plate boss 15 is provided at the bottom of the sensor housing 1. When the protective sheet 3 is inserted into the slot, the pressure plate boss 15 presses against the upper surface of the protective sheet 3, providing downward pressure to the protective sheet 3.

[0039] Furthermore, the pressing boss 15 has an insertion guide slope 150 in the insertion direction of the protective sheet 3. The pressing boss 15 on the sensor housing 1 not only has the function of pressing the protective sheet 3, but also forms an insertion guide slope 150 in the insertion direction of the protective sheet 3, which facilitates the insertion of the protective sheet 3 and prevents scratches from being generated on the surface of the protective sheet 3.

[0040] In a possible implementation, the bottom of the sensor housing 1 is provided with a micro touch switch 16, which is electrically connected with the circuit in the sensor housing 1. The micro touch switch 16 can detect whether the protection sheet 3 is installed. When the protection sheet 3 is inserted into the slot, the upper surface of the protection sheet 3 presses the micro touch switch 16, so that the micro touch switch 16 is closed. The sensor can detect that the protection sheet 3 is installed, and the sensor works normally. When the protection sheet 3 is pulled out, the micro touch switch 16 is opened, and the sensor detects that the protection sheet 3 is not installed, and the sensor alarms, preventing the sensor from working in the case of forgetting to insert the protection sheet 3, and avoiding that the window sheet of the sensor itself is polluted.

[0041] In a possible implementation, when the protection sheet 3 is inserted, the micro touch switch 16 is closed, the internal circuit of the sensor is powered on, and the working indicator light, the laser, the camera and the like can work normally. When the protection sheet 3 is pulled out, the micro touch switch 16 is opened, the internal circuit of the sensor is disconnected, and the working indicator light, the laser, the camera and the like cannot work normally, and an alarm signal is sent at the same time.

[0042] Further, the micro touch switch 16 is formed with a contact guide slope surface 160 in the insertion direction of the protection sheet 3. The contact guide slope surface 160 also has the same effect as the insertion guide slope surface 150 of the pressing sheet boss 15 in the insertion direction of the protection sheet 3, facilitating the insertion of the protection sheet 3, and avoiding scratches on the surface of the protection sheet 3.

[0043] As shown in Figure 7 In a possible implementation, the lower surface of the socket 24 is formed with two guide bosses 240 protruding upward, and the interval between the two guide bosses 240 is greater than the opening size of the visual hole 22 and the laser hole 23. When the protection sheet 3 is inserted into the protection cover 2, scratches will inevitably be generated on the surface of the protection sheet 3, which will interfere with the visual detection. In the embodiment of the application, the two sides of the socket 24 are provided with guide bosses 240, and the interval between the guide bosses 240 is greater than the opening size of the visual hole 22 and the laser hole 23. Even if scratches are generated, the scratches are located on the two sides of the visual hole 22 and the laser hole 23, and will not affect the visual detection.

[0044] In a possible implementation, the exposed end of the protection sheet 3 has a long hole 31, which facilitates the user to insert and pull out. The protection sheet 3 is installed in a plug-in manner, without the need to disassemble any part, which is convenient and fast. At the same time, the guide bosses 240 are matched to prevent the scratches on the protection sheet 3 from affecting the visual detection.

[0045] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, and are not limited thereto, the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. All should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A weld tracking sensor characterized by, The sensor shell, the protective cover and the protection sheet are included. The protective cover is installed on the bottom of the sensor shell, and an air inlet is arranged on the upper surface of the protective cover. The bottom of the protective cover is formed with a visual hole and a laser hole, and a transverse slot is formed in the protective cover. The side wall of the protective cover is provided with a socket, and the protection sheet is inserted into the slot through the socket.

2. The weld tracking sensor of claim 1, wherein, The lower surface of the protection sheet and the protective cover form an air duct, and the air inlet is communicated with the air duct.

3. The weld tracking sensor of claim 1, wherein, The sweep gas is blown out from the air hole, directly enters the air duct through the air inlet, and is discharged from the visual hole and the laser hole.

4. The weld tracking sensor of claim 1, wherein, The upper edge of the visual hole and the laser hole and the lower surface of the protection sheet form a gap.

5. The weld tracking sensor of claim 1, wherein, The outer wall of the visual hole and the laser hole is formed with a gas flow guide slope.

6. The weld tracking sensor of claim 5, wherein, The protective cover is provided with a top bead, and the top bead presses the lower surface of the protection sheet when the protection sheet is inserted into the slot.

7. The weld tracking sensor of claim 1, wherein, The bottom of the sensor shell is provided with a sheet pressing boss, and the sheet pressing boss presses the upper surface of the protection sheet when the protection sheet is inserted into the slot. The sheet pressing boss is formed with an insertion guide slope in the insertion direction of the protection sheet.

8. The weld tracking sensor of claim 7, wherein, The bottom of the sensor shell is provided with a micro touch switch, and the micro touch switch is electrically connected with the circuit in the sensor shell.

9. The weld tracking sensor of claim 1, wherein, The upper surface of the protection sheet presses the micro touch switch when the protection sheet is inserted into the slot, so that the micro touch switch is closed, and the insertion of the protection sheet is detected.

10. The weld tracking sensor of claim 1, wherein, The micro touch switch is formed with a contact guide slope in the insertion direction of the protection sheet. The lower surface of the socket is formed with two guide bosses upwardly protruding, and the distance between the two guide bosses is greater than the opening size of the visual hole and the laser hole. The sensor shell is provided with an adjusting valve, and the adjusting valve is used for adjusting the gas amount of the sweep gas.

Images