Foreign matter scraping device for a rotating structure and method of installing the same, welding system

Abstract

The application provides a foreign matter scraping device for a rotating structure, a mounting method thereof and a welding system. The foreign matter scraping device comprises a mounting base fixed with a guide structure, first and second sliding rods, the first and second sliding rods are arranged in parallel and are spaced apart, the guide structure is in clearance fit with the first sliding rod and the first sliding rod, the first sliding rod is fixedly connected with the second sliding rod through a connecting piece, one end of the second sliding rod is provided with a scraping piece, a nut is sleeved on the first sliding rod, and an external thread matched with the nut is arranged, a spring is arranged between the nut and the guide structure facing the nut, the spring is sleeved on the outer side of the first sliding rod, one end of the spring is mounted on the nut, and the other end of the spring is mounted on the guide structure facing the nut, the guide structure facing the nut is located between the nut and the connecting piece, and the first connecting position is the connecting position of the first sliding rod and the connecting piece.

Description

Technical Field

[0001] This invention belongs to the field of steel strip and band saw blade processing equipment, specifically relating to a foreign matter scraping device for rotating structures and its installation method, a welding system, and the cleaning of welding slag during band saw blade processing. Background Technology

[0002] In the process of manufacturing saw blades, two different types of steel strips (steel wire and steel strip) are laser-welded together, splicing them side-by-side before being processed into the saw blade. The saw blade's teeth are formed from steel wire, possessing rigidity to cut objects, while the back of the blade is formed from steel strip, possessing flexibility to drive the teeth's rotation. Laser welding is a high-density energy welding process using Gaussian energy. When laser welding is applied to two different materials, it produces large sparks and molten material particles (commonly known as weld slag or spatter).

[0003] In steel strip and wire welding systems, the thickness of the steel strips and wires being joined is typically only 0.65-1.6mm. Therefore, during laser welding, clamps and positioning wheels must be used to ensure that the steel wire and strip are on the same horizontal plane. Otherwise, the laser will not reach the interface between the two materials, resulting in a weak weld and potentially causing saw blade failure (tooth loss). The positioning wheel is used to avoid scratching the sidewalls of the steel wire by rotating tangentially to it as the wire travels. The positioning wheel is generally no more than 1.5mm away from the laser welding point, and it needs to rotate continuously and smoothly to ensure the smooth progress of the steel wire. Welding slag spatter from laser welding easily adheres to the positioning wheel, affecting its smooth rotation. When spatter adheres to the positioning wheel, quality issues such as weld beads, inconsistent width, and incomplete penetration may occur between the steel wire and strip.

[0004] To reduce the negative impact of molten slag adhering to the positioning wheel, existing technologies generally employ the following methods: periodically applying high-temperature resistant vacuum silicone grease to the positioning wheel to reduce the adhesion of welding slag, or manually scraping the positioning wheel with a scraper every half hour.

[0005] However, both applying vacuum grease and manual scraping require regular personnel intervention, which is inefficient, labor-intensive, and prone to omissions. Moreover, vacuum grease has the following problems: (1) it is difficult to apply evenly, and when too much is applied, it will fall onto the steel wire, directly affecting the welding quality; (2) it causes the steel wire to slide up and down, resulting in a shift in the welding position and affecting the weld quality; (3) it generates fumes that pollute the laser welding head. Summary of the Invention

[0006] The problem this invention aims to solve is the low efficiency and high labor cost of applying vacuum silicone grease and manually scraping to remove welding slag in existing steel strip and wire welding systems. The invention provides a foreign matter scraping device for rotating structures.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a foreign object scraping device for a rotating structure, including a mounting base (16), and further including a first sliding rod (121) and a second sliding rod (122). The first sliding rod (121) and the second sliding rod (122) are spaced apart and are both parallel to a first direction, the first direction being the extension direction of the first sliding rod (121).

[0008] At least one guide structure is fixed on the mounting base (16); the guide structure is used to limit the first sliding rod (121) in the circumferential direction and to limit the second sliding rod (122) in the circumferential direction, so that the travel direction of the first sliding rod (121) and the travel direction of the second sliding rod (122) are both parallel to the first direction; the guide structure is clearance-fitted with the first sliding rod (121) and the second sliding rod (122);

[0009] The first sliding rod (121) is fixedly connected to the second sliding rod (122) through the connector (13);

[0010] The second sliding rod (122) has a scraper (11) installed at one end for contacting the side wall of the rotating structure.

[0011] A nut (14) is fitted onto the first sliding rod (121); the first sliding rod (121) is provided with an external thread (12A) that mates with the nut (14); the length of the external thread (12A) in the first direction is greater than the length of the nut (14) in the first direction;

[0012] A spring (15) is provided between the nut (14) and the guide structure facing the nut (14). The spring (15) is sleeved on the outside of the first sliding rod (121). One end of the spring (15) abuts against the nut (14), and the other end of the spring (15) abuts against the guide structure facing the nut (14).

[0013] The nut (14) and the scraper (11) are both located on the same side (i.e. one side of the guide structure) of the guide structure facing the nut (14).

[0014] With the above configuration, the first and second sliding rods are limited in the circumferential direction, allowing them to move only back and forth relative to the guide mechanism (i.e., along the first direction). By setting the external thread, nut, and corresponding length, the position of the nut in the length direction of the external thread (i.e., the first direction) is adjustable. When the nut is not rotated, the nut, first sliding rod, connector, and second sliding rod form a unified structure that moves together. When the nut rotates, reducing the distance between the nut and the guide structure facing the nut, the spring is compressed. The spring then generates a reaction force on the nut, causing the nut to tend to move away from the guide structure. This, in turn, drives the first and second sliding rods in the unified structure to move in the same direction as the nut, or to have a tendency to move in the same direction, allowing the scraper to apply a greater resistance force to the outer wall of the rotating structure. When the nut is rotated, increasing the distance between the nut and the guide structure facing the nut, the spring is stretched. The spring then exerts a reaction force on the nut, causing it to tend to move towards the guide structure. This, in turn, causes the first and second sliding rods in the integrated structure to move in the same direction as the nut, or to have a tendency to move in the same direction. This allows the scraper to apply less resistance to the outer wall of the rotating structure, or to move away from the outer wall. This design effectively adjusts the force applied by the scraper to the outer wall of the rotating structure. Furthermore, when the outer wall of the rotating structure is covered with hard weld slag that the scraper cannot remove in one go, the slag abuts against the scraper, causing it to move away from the rotating structure. This compresses the spring. The spring's adjustable extension and retraction avoids the jamming phenomenon in existing technologies where the scraper cannot remove the hard weld slag and cannot retract, thus preventing excessive interference with the rotation of the rotating structure.

[0015] Furthermore, the guide structure includes a fixed seat (17) fixed to the mounting base (16), and the fixed seat (17) is provided with a first through hole (171) and a second through hole (172) respectively corresponding to the first sliding rod (121) and the second sliding rod (122); the axial direction of the first through hole (171) and the axial direction of the second through hole (172) are both parallel to the first direction.

[0016] With the above settings, the first sliding rod and the second sliding rod can be limited in the circumferential direction through the first through hole and the second through hole respectively, so that the first sliding rod and the second sliding rod can only move back and forth.

[0017] In a preferred embodiment, at least two of the guide structures are provided at intervals along a first direction.

[0018] Through the above configuration, the guide structure limits the movement of the first and second sliding rods in the circumferential direction. The at least two guide structures spaced apart along the first direction result in a more effective limiting effect on the first and second sliding rods, and a smoother movement of the first and second sliding rods in the first direction.

[0019] In a preferred embodiment, a first guide sleeve (181) is provided on at least one side of the first through hole (171), and a second guide sleeve (182) is provided on at least one side of the second through hole (172).

[0020] The first guide sleeve (181) and the second guide sleeve (182) are both mounted on the fixed base (17).

[0021] By setting the first guide sleeve and the second guide sleeve, the limiting effect on the sliding rod is improved.

[0022] Furthermore, in the guide structure toward the nut (14), the fixing seat (17) includes a detachably connected third guide sleeve (183) and a fixing seat base (17A).

[0023] The fixed base (17A) is fixed to the mounting base (16) and sleeved on the outside of the third guide sleeve (183); the third guide sleeve (183) is used to install the other end of the spring (15) and sleeved on the outside of the first sliding rod (121), and the first through hole (171) is opened on the inner side of the third guide sleeve (183).

[0024] When the third guide sleeve (183) and the fixed base (17A) are connected, the third guide sleeve (183) and the fixed base (17A) are fixed to each other;

[0025] When the third guide sleeve (183) and the fixed base (17A) are not connected, the third guide sleeve (183) can move away from the nut (14) relative to the fixed base (17A).

[0026] With the above settings, when the scraper needs to be replaced, there is no need to remove the fixed base. Simply make the third guide sleeve and the fixed base unconnected, and the third guide sleeve can be moved away from the nut relative to the fixed base, so that the spring length is extended. This causes the first sliding rod and the second sliding rod to move away from the rotating mechanism together, thus leaving space between the scraper and the rotating mechanism, which facilitates the replacement of the scraper.

[0027] In a preferred embodiment, the third guide sleeve (183) forms a protrusion on the fixed base (17A) facing the nut (14).

[0028] With the above settings, when the third guide sleeve and the fixed base are not connected, the protruding third guide sleeve can be pushed away from the nut, which will cause the nut to move accordingly, so that the overall structure of the nut, the first sliding rod and the second sliding rod moves away from the rotating structure.

[0029] In a preferred embodiment, the third guide sleeve (183) includes a first end (1831), a connecting portion (1833), and a second end (1832) connected in sequence; the outer circumferential dimensions of the first end (1831) and the second end (1832) are both larger than the outer circumferential dimensions of the connecting portion (1833), so that the third guide sleeve (183) forms an I-shaped structure; the fixed base (17A) is provided with a base through hole (173), the base through hole (173) includes a relief groove (1731) and a guide sleeve mating section (1732) connected to each other, the guide sleeve mating section (1732) is located away from the nut (1) of the relief groove (1731). 4) One side; the size of the relief groove (1731) is adapted to the outer peripheral size of the first end (1831), and the size of the guide sleeve mating section (1732) is adapted to the size of the connecting part (1833); the outer peripheral size of the first end (1831) and the outer peripheral size of the second end (1832) are both larger than the size of the guide sleeve mating section (1732), and the length of the connecting part (1833) in the first direction is greater than the length of the guide sleeve mating section (1732) in the first direction; when the third guide sleeve (183) is fixedly connected to the fixed base (17A) through the guide sleeve fastener (17B), the second end (1832) contacts the fixed base (17A).

[0030] With the above configuration, when the scraper needs to be replaced, after disassembling the guide sleeve fixing component, the third guide sleeve can be moved away from the fixed base relative to the nut. Furthermore, the limiting effect of the clearance groove wall prevents the third guide sleeve from completely separating from the fixed base. Additionally, after the scraper replacement is completed, moving the third guide sleeve to the position where its second end contacts the fixed base allows the guide sleeve fastener to securely connect the third guide sleeve to the fixed base, avoiding the problem of the third guide sleeve being difficult to move back to its fixed position after mutual movement.

[0031] Furthermore, when the scraper (11) contacts the rotating structure, the distance between the end of the first sliding rod (121) away from the guide structure and the side wall of the rotating structure is greater than the length of the nut (14) in the first direction.

[0032] The above configuration allows the nut to be unscrewed and replaced from the gap between the first sliding rod (121) and the rotating structure, and also facilitates the replacement of the scraper.

[0033] Furthermore, the first sliding rod (121) is fixedly connected to the second sliding rod (122) through the connector (13). The positions where the first sliding rod (121) is connected to the connector (13) and the positions where the second sliding rod (122) is connected to the connector (13) are both located on the other side of the guide structure facing the nut (14).

[0034] Through the above arrangement, the first sliding rod, the connecting piece, and the second sliding rod are fixed together to form an integral structure.

[0035] Furthermore, the scraper (11) is detachably connected to the second sliding rod (122); the scraper (11) has K scraper segments, and the scraper (11) has K installation positions corresponding to the K scraper segments respectively, where K≥2;

[0036] When the scraper (11) is located at any of the j-th installation positions among the K installation positions, the j-th scraper segment corresponding to the j-th installation position is facing the side wall of the rotating structure, 1≤j≤K.

[0037] With the above settings, when one scraper section of the scraper is worn out and cannot be used, the installation position of the scraper can be adjusted, and the other scraper section of the scraper can be used to remove the welding slag from the surface of the rotating structure.

[0038] Preferably, the scraper is a polyhedral structure with at least four surfaces, and the scraper segment is an edge of the polyhedral structure.

[0039] Preferably, when any scraper segment of the scraper (11) contacts the side wall of the rotating structure, the angle between the scraper (11) and the rotating structure is in the range of [15°, 75°].

[0040] More preferably, the range of the angle between the scraper (11) and the rotating structure is:

[0041] By setting the angle range to [40°, 50°], the scraper section achieves better scraping effect on the welding slag on the side wall of the rotating structure. The applicant's research found that setting the angle range to [40°, 50°] makes the scraper section even more effective at removing welding slag from the side wall of the rotating structure.

[0042] More preferably, when one edge of the scraper (11) contacts the side wall of the rotating structure, the facing angle between the scraper (11) and the rotating structure is defined as: the angle between the rotating structure in the opposite direction of the direction of travel of the one edge and the surface of the scraper (11) located at the facing position of the rotating structure; the surface of the scraper (11) located at the facing position of the rotating structure is the surface where the one edge is located.

[0043] Based on the same inventive concept, the present invention also provides a method for installing a foreign object scraping device, wherein the foreign object scraping device is any of the foreign object scraping devices described above.

[0044] The installation method includes:

[0045] Step A: When installing the scraper (11) on the second sliding rod (122), adjust the position of the second sliding rod (122) in the first direction so that there is a gap between the scraper (11) and the rotating structure;

[0046] Step B: After the scraper (11) is installed, adjust the position of the second sliding rod (122) in the first direction so that the scraper (11) contacts the side wall of the rotating structure;

[0047] Step C: By adjusting the position of the nut (14) on the first sliding rod (121), the first gap is reduced by △L1, where △L1 is a first preset value, and the first gap is the gap between the nut (14) and the guide structure facing the nut (14);

[0048] In the installation method, step A above can prevent the scraper from colliding with the rotating structure during the installation of the foreign object scraping device. After the mounting base is installed, step B allows the scraper to contact the side wall of the rotating structure. Then, step C adjusts the position of the nut on the first sliding rod, causing the nut to compress the spring, which in turn generates an elastic force on the nut. This causes the overall structure consisting of the first and second sliding rods to tend to move towards the rotating structure, allowing the scraper mounted on the second sliding rod to abut against the side wall of the rotating structure. This allows the welding slag on the side wall of the rotating structure to be cleaned when the rotating structure rotates.

[0049] Furthermore, the scraper (11) is detachably connected to the second sliding rod (122); the scraper (11) has K scraper segments, and the scraper (11) has K installation positions corresponding to the K scraper segments respectively, where K≥2;

[0050] The installation method further includes: when it is necessary to replace the scraper section of the scraper (11), the following steps are performed:

[0051] Step M1: Adjust the position of the nut (14) on the first sliding rod (121) to increase the first gap by △L2, thereby creating a gap between the scraper (11) and the rotating structure. △L2 is the second preset value.

[0052] Step M2: Adjust the installation position of the scraper (11) so that the scraper section corresponding to the adjusted installation position is oriented toward the rotating structure;

[0053] Step M3: Adjust the position of the nut (14) on the first sliding rod (121) so that the first gap decreases by △L3, where △L3 is the third preset value.

[0054] With the above settings, when it is necessary to replace the scraper section of the scraper, adjust the position of the nut, that is, turn the nut in the direction that causes the spring to extend, so that the first sliding rod drives the second sliding rod to move away from the position of the rotating structure, so that there is a gap between the scraper and the rotating structure, which makes it easier to adjust the scraper section of the scraper or replace the scraper.

[0055] According to the same inventive concept, the present invention also provides a welding system, including a welding device (3) for welding a workpiece, and the aforementioned foreign matter scraping device, wherein the rotating structure is a first positioning wheel (2); the first positioning wheel (2) is used to limit the workpiece and is tangent to the side wall of the workpiece.

[0056] Furthermore, the welding system also includes a first limiting mechanism (5), a second limiting structure (6), and a second positioning wheel (2A).

[0057] Both the first limiting mechanism (5) and the second limiting structure (6) are used to limit the workpiece in the height direction of the welding system;

[0058] In the direction of workpiece travel, the first limiting mechanism (5) and the second limiting structure (6) are located in front of and behind the welding device (3), respectively;

[0059] The first positioning wheel (2) and the second positioning wheel (2A) are located on both sides of the workpiece, respectively;

[0060] The second positioning wheel (2A) is tangent to the side wall of the workpiece, thereby limiting the position of the workpiece.

[0061] With the above settings, the first limiting mechanism and the second limiting mechanism are used to limit the workpiece in the height direction at the front and rear of the welding device, respectively, thereby ensuring that the workpiece is fixed at the height of the welding position and avoiding vertical displacement. In addition, the first positioning wheel and the second positioning wheel limit the workpiece on the left and right sides, so that the workpiece can be limited in the upper, lower, left and right directions. This ensures that the workpiece moves smoothly at the welding position and avoids vertical, horizontal and left displacement of the workpiece, which would affect the welding quality.

[0062] Furthermore, the workpiece includes a first workpiece (100) and a second workpiece (200) arranged adjacent to each other.

[0063] The first positioning wheel (2) is located on the side of the first workpiece (100) away from the second workpiece (200) and is tangent to the outer wall of the first workpiece (100);

[0064] The second positioning wheel (2A) is located on the side of the second workpiece (200) away from the first workpiece (100) and is tangent to the outer wall of the second workpiece (200); the welding device (3) is used to weld the first workpiece (100) and the second workpiece (200) together.

[0065] With the above settings, the first positioning wheel and the second positioning wheel are used to limit the first workpiece and the second workpiece on both sides respectively, and the positioning wheel rotates to avoid damaging the side wall of the workpiece when it moves.

[0066] The advantages and positive effects of this invention are:

[0067] 1. This invention adopts a mechanical scraping design, which can reduce the consumption of mechanical materials (vacuum silicone grease).

[0068] 2. The present invention has a smaller impact on the smooth operation of the steel wire, and avoids the problem of the steel wire sliding up and down on the positioning wheel when applying too much vacuum grease, which is a problem in the prior art. This reduces potential quality risks.

[0069] 3. Compared with the existing technology of personnel inspecting and scraping at certain intervals, the present invention reduces the frequency of personnel inspections, reduces the impact on production efficiency, improves the efficiency of single-step production, and significantly reduces potential quality risks compared with the oversight of personnel inspection and scraping.

[0070] 4. By adopting this invention, the probability of welding quality accidents caused by the positioning wheel jamming is reduced, the service life of the positioning wheel can be extended, and compared with the existing technology of personnel scraping at certain intervals, this invention can reduce the accumulation of welding slag spatter on the positioning wheel through the uninterrupted scraping of the foreign matter scraping device.

[0071] 5. The present invention has been verified to have a good slag removal effect and a long service life. It not only solves the problem of short service life of positioning wheels, but also reduces quality risks such as poor welding. Attached Figure Description

[0072] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0073] Figure 1 This is a partial three-dimensional structural schematic diagram of the welding system in Embodiment 1 of the present invention;

[0074] Figure 2 yes Figure 1Enlarged view of the M-structure;

[0075] Figure 3 yes Figure 1 A partial top view of the welding system in the middle;

[0076] Figure 4 It's viewed from one direction. Figure 1 Three-dimensional structural diagram of the foreign object scraping device;

[0077] Figure 5 yes Figure 4 AA sectional view;

[0078] Figure 6 It's being viewed from another direction. Figure 1 Three-dimensional structural diagram of the foreign object scraping device;

[0079] Figure 7 It's being viewed from yet another direction. Figure 1 Three-dimensional structural diagram of the foreign object scraping device;

[0080] Figure 8 yes Figure 4 Front view of the foreign object scraping device;

[0081] Figure 9 yes Figure 4 Bottom view of the foreign object scraping device;

[0082] Figure 10 yes Figure 4 Side view of the foreign object scraping device;

[0083] Figure 11 It is the replacement in Embodiment 2 of the present invention Figure 5 AA sectional view;

[0084] Figure 12 It is the replacement in embodiment 3 of the present invention Figure 5 AA sectional view;

[0085] Figure 13 yes Figure 12 A schematic diagram after removing the third guide sleeve;

[0086] Figure 14 yes Figure 12 A schematic diagram of the third guide sleeve.

[0087] In the above figures, scraper 11; surface 11a; scraper fastener 111; first edge f1; second edge f2; first sliding rod 121; second sliding rod 122; external thread 12A; connector 13; nut 14; spring 15; mounting base 16; fixed base 17; fixed base base 17A; guide sleeve fastener 17B; first through hole 171; second through hole 172; base through hole 173; clearance groove 1731; guide sleeve mating section 1732; first guide sleeve 18 1; Second guide sleeve 182; Third guide sleeve 183; First end 1831; Second end 1832; Connecting part 1833; First positioning wheel 2; First positioning wheel sidewall 21; Second positioning wheel 2A; Welding device 3; Workpiece guiding mechanism 4; First limiting mechanism 5; First limiting member 51; Second limiting member 52; Second limiting structure 6; First roller 61; Second roller 62; First workpiece 100; Second workpiece 200; Welding position W1; Contact position Wa. Detailed Implementation

[0088] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0089] like Figures 1-10 As shown, the present invention provides a foreign matter scraping device for a rotating structure, including a mounting base 16, and further including a first sliding rod 121 and a second sliding rod 122. The first sliding rod 121 and the second sliding rod 122 are spaced apart and are both parallel to a first direction, which is the extension direction (i.e., the length direction) of the first sliding rod 121. Preferably, the first direction can be the running direction of the workpiece (e.g., the direction of travel of the workpiece). Figure 1 In this invention, foreign matter refers to foreign matter that adheres to the surface of the rotating structure, such as welding slag that splashes onto the surface of the rotating structure and adheres when the welding device 3 welds the workpiece.

[0090] like Figure 6 As shown, the mounting base 16 has two fixed guide structures. The guide structures limit the movement of the first sliding rod 121 and the second sliding rod 122 in the circumferential direction, thereby ensuring that the travel directions of both the first and second sliding rods 121 are parallel to the first direction. The guide structures are clearance-fitted with both the first and second sliding rods 121 and 122.

[0091] The first sliding rod 121 is fixedly connected to the second sliding rod 122 via the connector 13.

[0092] One end of the second sliding rod 122 is equipped with a scraper 11 for contacting the side wall of the rotating structure (i.e., the outer wall of the rotating part of the rotating structure, i.e., the wall surface parallel to the axis of the rotating structure) to scrape foreign objects on the side wall of the rotating structure. In this embodiment, the side wall of the rotating structure is the side wall of the first positioning wheel 21.

[0093] A nut 14 is fitted onto the first sliding rod 121. The first sliding rod 121 has an external thread that mates with the nut 14. Preferably, the length of the external thread 12A in the first direction (the extension length of the external thread 12A in the first direction) is greater than the length of the nut 14 in the first direction (i.e., the extension length of the nut 14 in the first direction). That is, the dimension of the external thread 12A projected onto the first direction is greater than the dimension of the nut 14 projected onto the first direction. The nut 14 can move along the external thread 12A, allowing the distance between the nut 14 and the guide structure facing the nut 14 to be adjusted. The first direction is the length direction of the first sliding rod 121.

[0094] A spring 15 is provided between the nut 14 and the guide structure facing the nut 14 (i.e. the guide structure closest to the nut 14). The spring 15 is sleeved on the outside of the first sliding rod 121. One end of the spring 15 abuts against the nut 14 (can be installed on the nut 14), and the other end of the spring 15 abuts against the guide structure facing the nut 14 (can be installed on the guide structure facing the nut 14).

[0095] The guide structure for the nut 14 is located between the nut 14 and the first connection position, which is the connection position between the first sliding rod 121 and the connector 13. The guide structure for the nut 14 is located between the nut 14 and the connector 13, and also between the scraper 11 and the connector 13.

[0096] When the scraper 11 contacts the rotating structure, the distance between the end of the first sliding rod 121 away from the guide structure and the side wall of the rotating structure is greater than the length of the nut 14 in the first direction.

[0097] The guiding structure includes a fixed base 17 fixed to the mounting base 16, a first guide sleeve 181, and a second guide sleeve 182. The fixed base 17 has a first through hole 171 and a second through hole 172 corresponding to the first sliding rod 121 and the second sliding rod 122, respectively. The first sliding rod 121 and the outer wall of the first through hole 171 are in clearance fit, and the second sliding rod 122 and the outer wall of the second through hole 172 are also in clearance fit. The axial directions of the first through hole 171 and the second through hole 172 are both parallel to a first direction.

[0098] In this embodiment, two guide structures are provided at intervals along the first direction. Of course, three or more guide structures can also be provided.

[0099] A first guide sleeve 181 is provided on at least one side of the first through hole 171, and a second guide sleeve 182 is provided on at least one side of the second through hole 172.

[0100] The first guide sleeve 181 and the second guide sleeve 182 are both disposed on the fixed base 17.

[0101] The first guide sleeve 181 is clearance-fitted with the first sliding rod 121, and the second guide sleeve 182 is clearance-fitted with the second sliding rod 122.

[0102] The external threads on the nut 14 and the first sliding rod 121 are both located near one end of the first sliding rod 121. The other end of the first sliding rod 121 is fixed to the other end of the second sliding rod 122 via the connector 13. The first sliding rod 121 is fixedly connected to the second sliding rod 122 via the connector 13. The connection points of the first sliding rod 121 and the connector 13, and the connection points of the second sliding rod 122 and the connector 13, are both located on the other side of the guide structure facing the nut 14. In this embodiment, all guide structures are located between the scraper 11 and the connector 13, and also between the nut 14 and the connector 13.

[0103] The scraper 11 is detachably connected to the second sliding rod 122. The scraper 11 has K scraper segments, and the scraper 11 has K installation positions corresponding to the K scraper segments, where K ≥ 2.

[0104] When the scraper 11 is located at any of the j-th installation positions among the K installation positions, the j-th scraper segment corresponding to the j-th installation position is facing the side wall of the rotating structure, 1≤j≤K.

[0105] Preferably, the scraper 11 is a polyhedral structure with at least four surfaces, and the scraper segment is an edge of the polyhedral structure. The scraper 11 can be a cuboid structure, meaning the scraper segment is an edge of the cuboid. In this embodiment, a groove is formed in one cuboid, and another cuboid is fixed in the groove, thereby forming the scraper 11, which is a polyhedral structure. Figure 8 As shown, the first edge f1 and the second edge f2 of the polyhedral structure can be used as scraper segments. That is, when scraping the rotating structure, the edges of the polyhedral structure are parallel to the rotation axis of the rotating structure. Figure 1 In the view shown, the first edge f1 acts as a scraper segment to scrape the weld slag on the side wall of the rotating structure. After rotating the scraper 11 180 degrees, the second edge f2 can also be used as a scraper segment. When the edge contacts the side wall of the first positioning wheel 2, the edge is parallel to the axis of the rotating structure.

[0106] When any scraper segment of scraper 11 contacts the side wall of the rotating structure, the angle between scraper 11 and the rotating structure is in the range of [15°, 75°]; the extension direction of the edge in contact with the side wall of the rotating structure is parallel to the axis of the rotating structure. More preferably, the angle between scraper (11) and the rotating structure is in the range of [40°, 50°].

[0107] When one edge of the scraper 11 contacts the side wall of the rotating structure, the facing angle between the scraper 11 and the rotating structure is defined as: the angle between the rotating structure in the opposite direction of its travel direction at the position of the edge and the surface of the scraper 11 located at the facing position of the rotating structure; the surface of the scraper 11 located at the facing position of the rotating structure is the surface where the edge is located.

[0108] like Figure 3 As shown, when the first edge f1 of the scraper 11 (as a scraper section) contacts the side wall of the rotating structure (i.e., the side wall 21 of the first positioning wheel), the contact position Wa is located on the first edge f1, that is, the first edge f1 is the position where the scraper 11 is tangent to the first positioning wheel 2. Figure 3 In this context, the facing angle θ between the scraper 11 and the rotating structure is: the angle between the direction La opposite to the direction Lc (i.e., the direction of travel at the tangent position Wa) of the first positioning wheel 2 at the position of the first edge f1, and the surface 11a of the scraper 11 at the facing position of the rotating structure, which is also the angle between direction La and surface 11a, or the angle between direction La and direction Lb, where direction Lb is the axis passing through the first edge f1 and perpendicular to the first positioning wheel 2; the surface 11a of the scraper 11 at the facing position of the first positioning wheel 2 is the surface where the first edge f1 is located.

[0109] Based on the same inventive concept, the present invention also provides an installation method for a foreign object scraping device, wherein the foreign object scraping device is the aforementioned foreign object scraping device.

[0110] The installation method includes:

[0111] Step A: When installing the scraper 11 on the second sliding rod (122), adjust the position of the second sliding rod 122 in the first direction so that there is a gap between the scraper 11 and the rotating structure.

[0112] Step B: After the scraper 11 is installed, adjust the position of the second sliding rod 122 in the first direction so that the scraper 11 contacts the side wall of the rotating structure.

[0113] Step C: By adjusting the position of the nut 14 on the first sliding rod 121, the first gap is reduced by ΔL1, where ΔL1 is a first preset value. The first gap is the distance between the nut 14 and the guide structure facing the nut 14. The first preset value can be determined based on the required abutment force of the scraper 11 against the side wall of the rotating structure. The larger / smaller the first preset value, the larger / smaller the abutment force of the scraper 11 against the side wall of the rotating structure.

[0114] The scraper 11 is detachably connected to the second sliding rod 122. The scraper 11 has K scraper segments, and the scraper 11 has K installation positions corresponding to the K scraper segments, where K ≥ 2.

[0115] The installation method further includes: when it is necessary to replace the scraper section of the scraper 11, for example, when it is necessary to replace the first edge f1 with the second edge f2 for scraping, the following steps are performed:

[0116] Step M1: Adjust the position of nut 14 on the first sliding rod 121 to increase the first gap by ΔL2, thereby creating a gap between scraper 11 and rotating structure. ΔL2 is a second preset value.

[0117] Step M2: Adjust the installation position of the scraper 11 so that the scraper segment (i.e., the second edge f2) corresponding to the adjusted installation position is oriented toward the rotating structure.

[0118] Step M3: Adjust the position of nut 14 on the first sliding rod 121 so that the first gap is reduced by △L3, △L3 is the third preset value, so that the second edge f2 contacts the side wall of the first positioning wheel 2, thereby scraping the foreign objects on the side wall of the first positioning wheel 2.

[0119] In this embodiment, the scraper 11 can be fixed to the second sliding rod 122 by a scraper fastener 111 (e.g., a bolt). The installation position of the scraper 11 can be adjusted by adjusting the rotation position of the bolt. To ensure the scraper is relatively stable at each installation position and avoid large wobbling, for example, the bolt can be coupled with a spring to achieve stability at each tightening position of the bolt. Alternatively, the surface of the polyhedral structure facing the second sliding rod 122 can be set to have an angle between 15 degrees and 45 degrees with the extending direction of the second sliding rod 122. Figure 9 As shown, when the polyhedron is rotated to its various mounting positions, the surface of the polyhedron structure facing the second sliding rod 122 is limited by the second sliding rod 122, thereby preventing the polyhedron from shaking significantly during scraping.

[0120] The second preset value can be set according to the requirement that the second sliding rod 122 moves to the right after the spring is stretched, so that there is a gap between the scraper 11 and the rotating structure. The setting of the third preset value is similar to that of the first preset value, which can be determined according to the required abutment force of the scraper 11 against the side wall of the rotating structure.

[0121] Based on the same inventive concept, the present invention also provides a welding system, including the aforementioned foreign matter scraping device, wherein the rotating structure is a first positioning wheel 2. The first positioning wheel 2 is tangential to the side wall of the workpiece.

[0122] The first positioning wheel 2 is used to be tangential to the side wall of the workpiece. The speed of the first positioning wheel 2 on the tangent and the speed of the second positioning wheel 2A on the tangent are preferably the same as the traveling speed of the first workpiece and the second workpiece.

[0123] like Figures 1-3 As shown, the welding system further includes a first limiting mechanism 5, a second limiting structure 6, a second positioning wheel 2A, and a welding device 3 for welding the workpiece. The first limiting mechanism 5 and the second limiting structure 6 are both used to limit the workpiece in the height direction of the welding system. In the workpiece traveling direction, the first limiting mechanism 5 and the second limiting structure 6 are located in front of and behind the welding device 3, respectively. The first positioning wheel 2A and the second positioning wheel 2A are located on both sides of the workpiece. The second positioning wheel 2A is tangent to the side wall of the workpiece, thereby limiting the workpiece.

[0124] The workpieces include a first workpiece 100 and a second workpiece 200 arranged adjacent to each other. The first positioning wheel 2 is located on the side of the first workpiece 100 away from the second workpiece 200, and is flush with the outer wall of the first workpiece 100. Figure 1 The second positioning wheel 2A is located on the side of the second workpiece 200 away from the first workpiece 100, and is tangent to the outer wall of the second workpiece 200. Figure 1 The middle part is the right side wall of the second workpiece 200. Figure 1 The second workpiece 200 (not shown) is tangent to the first workpiece 100 and the second workpiece 200, whose top surfaces are on the same plane, and they are welded together to form an integral structure. The welding position W1 of the welding device 3 is located between the first workpiece 100 and the second workpiece 200, as shown in the figure. Figure 3 As shown.

[0125] In this invention, the steel strip and steel wire move side by side along the running direction. Laser welding of the steel strip and steel wire is performed at the welding position W1 to weld them together. Then, by milling teeth at the position of the steel wire in the welded structure, the tooth tip of the band saw blade can be formed.

[0126] In this embodiment, the first workpiece 100 is a steel wire, and the second workpiece 200 is a steel strip. The first limiting mechanism 5 includes a first limiting member 51 and a second limiting member 52 located above and below the workpiece, respectively. The first limiting member 51 and the second limiting member 52 constitute a clamping structure that simultaneously clamps the first workpiece 100 and the second workpiece 200. The second limiting structure 6 includes a first roller 61 and a second roller 62 located above and below the workpiece, respectively. Both the first roller 61 and the second roller 62 are in rolling contact with the workpiece. The workpiece guiding mechanism 4 can be a mechanism for clamping the workpiece. The mounting base 16 can be fixed on the side wall of the workpiece guiding mechanism 4. The first limiting member 51 and the second limiting member 52 can both be fixed on the wall surface of the workpiece guiding mechanism 4 facing the second limiting structure 6. The rotation axes of the first positioning wheel 2 (i.e., the rotating structure) and the second positioning wheel 2A are both perpendicular to the running direction of the workpiece. The first roller 61, the second roller 62, the first limiting member 51, and the second limiting member 52 ensure that the running plane of the steel strip and steel wire is horizontal, thus preventing the steel strip from tilting and affecting the welding effect.

[0127] The following is a more detailed description of this embodiment 1.

[0128] When laser welding composite steel strips (i.e., structures formed by welding steel strips and wires side by side), positioning wheels are required to maintain the fixed position of the steel strips for continuous welding. However, laser welding generates significant amounts of molten slag and spatter. When this slag and spatter adhere to the fixture, it affects the stability of the laser welding and the weld strength. This invention addresses this problem by removing the slag and spatter that adheres to the fixture during laser welding. Specifically, this invention solves the problem of cleaning slag and spatter adhering to the first positioning wheel 2 during continuous laser welding of steel strips. This invention can be used for steel strips or saw blades.

[0129] This invention uses a spring as the pressure source, providing buffering and adjustable functions. Adjusting the movement of the nut at the front end of the spring device regulates the force exerted by the foreign object scraping device (also known as a scraping device) on the positioning wheel. The scraper 11 can be made of a hard alloy block structure, which is wear-resistant and durable.

[0130] The foreign object scraping device and the positioning wheel can be designed at a 40-degree angle, so that the hard carbide cutting edge (i.e. the edge of the scraper 11) can directly fit against the positioning wheel. Moreover, the force of this angle is on the inner side of the positioning wheel. When it accidentally encounters a slightly larger piece of molten welding slag, the spring 15 will prevent the positioning wheel from being jammed immediately, thus avoiding stopping its rotation.

[0131] The foreign object scraping device uses two horizontal bars (i.e., the first sliding bar 121 and the second sliding bar 122) connected in parallel, which generates a certain supporting force and ensures that the device can move flexibly and reliably from left to right.

[0132] The carbide foreign object scraping device has multiple surfaces, including front, back, left, and right. The edges can be selected as scraper sections and can be replaced according to wear and tear.

[0133] The specific installation and usage method of the foreign matter scraping device of the present invention is as follows:

[0134] a. Fix the carbide polyhedron with a central hole (i.e., scraper 11) to the head of the foreign matter scraping device using screws (i.e. scraper fastener 111), i.e., the screw can be fixed in the central hole.

[0135] b. Then, press the edge of the polyhedron (i.e., the first edge f1) against the first positioning wheel 2.

[0136] d. Then slowly adjust the position of nut 14, and adjust nut 14 clockwise so that scraper 11 is closer to the first positioning wheel 2, until the fine welding slag can be scraped off.

[0137] e. When replacing the scraper section (i.e. the polyhedral edge that contacts the welding slag on the outer wall of the first positioning wheel 2), adjust the nut counterclockwise until the scraper 11 can no longer be attached to the first positioning wheel 2 (i.e. there is a gap between the scraper 11 and the first positioning wheel).

[0138] f. Rotate the screw used to fix the scraper 11 by a certain angle, replace the scraper section of the scraper 11 (i.e. replace the edge that contacts the welding slag on the outer wall of the first positioning wheel 2), and it can be used again.

[0139] In this invention, when it is necessary to increase the pressure of the scraper 11 on the first positioning wheel 2, the nut 15 can be turned to reduce the distance between the nut 15 and the fixed seat 17 facing the nut. The spring 15 is compressed, that is, the pressure exerted by the spring 15 on the nut 14 increases. This force is transmitted to the scraper 11 through the nut 14, the first sliding rod 121, the connecting member 13, and the second sliding rod 122, so that the scraper 11 applies greater pressure to the outer wall of the positioning wheel 2.

[0140] When it is necessary to reduce the pressure of the scraper 11 on the first positioning wheel 2, the nut 15 can be turned to increase the distance between the nut 15 and the fixed seat 17 facing the nut. The spring 15 extends, that is, the pressure exerted by the spring 15 on the nut 14 is reduced. This force is transmitted to the scraper 11 through the nut 14, the first sliding rod 121, the connecting member 13, and the second sliding rod 122, so that the scraper 11 exerts less pressure on the outer wall of the positioning wheel 2.

[0141] After the foreign object scraping device of the present invention is installed, the scraper 11 can contact the side wall (outer wall) of the first positioning wheel 2, and the scraper 11 abuts against the side wall of the first positioning wheel 2, and the spring 15 is in a free state (i.e., a critical state between the compressed state and the stretched state) or in a compressed state.

[0142] If the welding slag adhering to the outer side of the first positioning wheel 2 is stubborn and cannot be completely removed by a single scraping motion, the welding slag on the first positioning wheel 2 will push the scraper 11 to the right. At this time, the first sliding rod 121 drives the nut 14 to move to the right, compressing the spring 15 and preventing the first positioning wheel 2 from jamming. The compressed spring 15 generates a restoring force to the left, which still allows the scraper 11 to maintain a good contact with the outer wall of the first positioning wheel.

[0143] The purpose of providing two sliding rods (i.e., the first sliding rod 121 and the second sliding rod 122) in this invention is as follows: If the nut 14 is installed between the scraper 11 and the fixed seat 17, the scraper 11 will remain in contact with the positioning wheel after the foreign matter scraping device of this invention is installed. If the scraper 11 is worn and needs to be replaced, it will be difficult to disassemble the scraper 11. That is, it is easy to hit the first positioning wheel 2 during disassembly, which may damage the first positioning wheel 2. After removing the nut 14, the first sliding rod 121 and the second sliding rod 122 can be moved to the right together, thereby leaving a gap between the scraper 11 and the first positioning wheel 2, which facilitates the disassembly and replacement of the scraper 11.

[0144] Example 2

[0145] Figures 1-4 , Figures 6-10 Also shown as a structural diagram of Example 2. Figure 11 replace Figure 5 As Figure 4 AA sectional view.

[0146] The main difference between Embodiment 2 and Embodiment 1 is that, in the guide structure facing the nut 14, the fixed base 17 includes a detachably connected third guide sleeve 183 and a fixed base base 17A. The fixed base base 17A is fixed to the mounting base 16 and sleeved on the outside of the third guide sleeve 183. The third guide sleeve 183 is used to install the other end of the spring 15 and is sleeved on the outside of the first sliding rod 121. The inner side of the third guide sleeve 183 has a first through hole 171 for clearance fitting with the first sliding rod 121. When the third guide sleeve 183 and the fixed base base 17A are connected, the third guide sleeve 183 is fixed to the fixed base base 17A by the guide sleeve fastener 17B. When the third guide sleeve 183 and the fixed base base 17A are not connected, the third guide sleeve 183 can move away from the nut 14 relative to the fixed base base 17A. The third guide sleeve 183 forms a protrusion facing the nut 14 on the fixed base base 17A.

[0147] For other structures in this embodiment, please refer to the content in Embodiment 1.

[0148] Example 3

[0149] Figures 1-4 , Figures 6-10 Also shown as a structural diagram of Example 3. Figure 12 replace Figure 5 As Figure 4 A sectional view of AA. The main difference between this embodiment 3 and embodiment 2 is that the third guide sleeve 183 includes a first end 1831, a connecting part 1833, and a second end 1832 connected in sequence. The outer circumferential dimensions of the first end 1831 and the second end 1832 are both larger than the outer circumferential dimension of the connecting part 1833, so that the third guide sleeve 183 forms an I-shaped structure. The fixed base 17A has a base through hole 173, which includes a relief groove 1731 and a guide sleeve mating section 1732 connected to each other. The guide sleeve mating section 1732 is located on the side of the relief groove 1731 away from the nut 14. The size of the relief groove 1731 is adapted to the outer circumferential dimension of the first end 1831, and the size of the guide sleeve mating section 1732 is adapted to the size of the connecting part 1833. The outer circumferential dimensions of the first end 1831 and the second end 1832 are both larger than the dimensions of the guide sleeve mating section 1732, and the length of the connecting portion 1833 in the first direction is greater than the length of the guide sleeve mating section 1732 in the first direction. That is, the dimension of the connecting portion 1833 projected onto the first direction is greater than the dimension of the guide sleeve mating section 1732 projected onto the first direction. When the third guide sleeve 183 is fixedly connected to the fixed base 17A via the guide sleeve fastener 17B, the second end 1832 contacts the fixed base 17A.

[0150] like Figures 12-14 As shown, when the third guide sleeve 183 is fixedly connected to the fixed base 17A via the guide sleeve fastener 17B, the wall surface of the fixed base 17A away from the nut 14 contacts the second end 1832. Since the length of the connecting part 1833 in the first direction is greater than the length of the guide sleeve mating section 1732 in the first direction, there is still a gap between the first end 1831 and the wall surface of the relief groove 1731 (i.e., the wall surface facing the first end 1831) in the first direction. That is, at least a part of the relief groove 1731 is not occupied, so that when the third guide sleeve 183 needs to move relative to the fixed base 17A in a direction away from the nut 14, the first end 1831 can extend into the relief groove 1731, and the wall surface of the relief groove 1731 plays a role in limiting the first end 1831. When the first end 1831 contacts the wall surface of the relief groove 1731 facing the first end 1831, there is a gap between the scraper 11 and the rotating structure, allowing the scraper 11 to be detached from the second sliding rod 122. Figure 12As shown, when the second end 1832 contacts the fixed base 17A, the through hole opened in the fixed base 17A and the groove opened in the third guide sleeve 183 are aligned with each other, so that the guide sleeve fastener 17B can extend into the through hole and the groove, thereby fixing the guide sleeve fastener 17B to the fixed base 17A.

[0151] Figures 12-14 In this document, the through holes or grooves corresponding to the guide sleeve fasteners on the third guide sleeve and the fixed base are omitted. The configuration of the guide sleeve fasteners can be found in [reference needed]. Figure 11 The settings can be configured. Alternatively, additional fasteners (not shown in the figure) can be provided on the side wall of the third guide sleeve 183 along the first direction to secure the third guide sleeve and the fixed base, thereby improving the mutual fixation effect between the third guide sleeve and the fixed base.

[0152] For other structures in this embodiment, please refer to the contents of Embodiment 1 and Embodiment 2.

[0153] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0154] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention. After reading this invention, those skilled in the art will understand that various equivalent modifications to the present invention fall within the scope defined by the appended claims. Unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

Claims

1. A foreign object removal device for rotating structures comprising a mounting base (16) characterised in that: Further comprising a first sliding rod (121) and a second sliding rod (122), the first sliding rod (121) and the second sliding rod (122) are arranged at intervals and are parallel to the first direction, the first direction is the extending direction of the first sliding rod (121); The mounting seat (16) is fixed with at least one guide structure; the guide structure is used for limiting the first sliding rod (121) in the circumferential direction and limiting the second sliding rod (122) in the circumferential direction, so that the running direction of the first sliding rod (121) and the running direction of the second sliding rod (122) are parallel to the first direction; the guide structure is in clearance fit with the first sliding rod (121) and the second sliding rod (122); The first sliding rod (121) is fixedly connected with the second sliding rod (122) through the connecting piece (13); One end of the second sliding rod (122) is provided with a scraping piece (11) used for contacting the side wall of the rotating structure; The first sliding rod (121) is provided with an outer thread (12A) matched with the nut (14); the length of the outer thread (12A) in the first direction is greater than the length of the nut (14) in the first direction; The nut (14) and the guide structure towards the nut (14) are provided with a spring (15), the spring (15) is sleeved outside the first sliding rod (121), one end of the spring (15) abuts against the nut (14), and the other end of the spring (15) abuts against the guide structure towards the nut (14); The nut (14) and the scraping piece (11) are located on one side of the guide structure towards the nut (14); The guide structure comprises a fixed seat (17) fixed to the mounting seat (16), and the fixed seat (17) is provided with a first through hole (171) and a second through hole (172) corresponding to the first sliding rod (121) and the second sliding rod (122) respectively; the axis directions of the first through hole (171) and the second through hole (172) are parallel to the first direction; Among the guide structure towards the nut (14), the fixed seat (17) comprises a third guide sleeve (183) and a fixed seat base (17A) which are detachably connected; The fixed seat base (17A) is fixed to the mounting seat (16) and is sleeved outside the third guide sleeve (183); the third guide sleeve (183) is used for mounting the other end of the spring (15) and is sleeved outside the first sliding rod (121); the first through hole (171) is formed in the inner side of the third guide sleeve (183); When the third guide sleeve (183) and the fixed seat base (17A) are in the connected state, the third guide sleeve (183) and the fixed seat base (17A) are fixed to each other; When the third guide sleeve (183) and the fixed seat base (17A) are in the unconnected state, the third guide sleeve (183) can move away from the nut (14) relative to the fixed seat base (17A).

2. The foreign object scraping device of claim 1, wherein: At least two guide structures are arranged at intervals along the first direction.

3. The foreign object scraping device of claim 1, wherein: At least one side of the first through hole (171) is provided with a first guide sleeve (181), and at least one side of the second through hole (172) is provided with a second guide sleeve (182); The first guide sleeve (181) and the second guide sleeve (182) are arranged on the fixed seat (17).

4. The foreign object scraping device of claim 1, wherein: The third guide sleeve (183) forms a protruding structure on the fixed seat base (17A) towards the nut (14).

5. The foreign object scraping device of claim 1, wherein: The third guide sleeve (183) comprises a first end portion (1831), a connecting portion (1833) and a second end portion (1832) connected in sequence; the outer circumferential dimension of the first end portion (1831) and the second end portion (1832) is greater than the outer circumferential dimension of the connecting portion (1833), so that the third guide sleeve (183) forms an I-shaped structure as a whole; the fixed seat base (17A) is provided with a base through hole (173) comprising a clearance groove (1731) and a guide sleeve matching section (1732) connected to each other, and the guide sleeve matching section (1732) is located on the side of the clearance groove (1731) away from the nut (14); the size of the clearance groove (1731) is adapted to the outer circumferential dimension of the first end portion (1831), and the size of the guide sleeve matching section (1732) is adapted to the size of the connecting portion (1833); the outer circumferential dimension of the first end portion (1831) and the second end portion (1832) is greater than the size of the guide sleeve matching section (1732), and the length of the connecting portion (1833) in the first direction is greater than the length of the guide sleeve matching section (1732) in the first direction; when the third guide sleeve (183) is fixedly connected to the fixed seat base (17A) through the guide sleeve fastener (17B), the second end portion (1832) is in contact with the fixed seat base (17A).

6. A foreign object scraping device according to any one of claims 1-5, characterized in that: When the scraping piece (11) is in contact with the rotating structure, the distance between the end of the first sliding rod (121) away from the guide structure and the side wall of the rotating structure is greater than the length of the nut (14) in the first direction.

7. A foreign object scraping device according to any one of claims 1-5, characterized in that: The positions where the first sliding rod (121) and the second sliding rod (122) are connected to the connecting piece (13) are both located on the other side of the guide structure towards the nut (14).

8. A foreign object scraping device according to any one of claims 1-5, characterized in that: The scraping piece (11) is detachably connected to the second sliding rod (122); the scraping piece (11) has K scraping segments, and the scraping piece (11) has K installation positions corresponding to the K scraping segments respectively, and K≥2; When the scraping piece (11) is located at any jth installation position in the K installation positions, the jth scraping segment corresponding to the jth installation position faces the side wall of the rotating structure, and 1≤j≤K.

9. A foreign object scraping device according to claim 8, characterized in that: The scraping piece (11) is a polyhedral structure having at least four surfaces, and the scraping segments are edges in the polyhedral structure; when any one of the scraping segments of the scraping piece (11) is in contact with the side wall of the rotating structure, the angle between the scraping piece (11) and the rotating structure is in the range of [15°, 75°]; and the extension direction of the edge in contact with the side wall of the rotating structure is parallel to the axis of the rotating structure.

10. A foreign object scraping device according to claim 9, characterized in that: The included angle between the scraping piece (11) and the rotating structure is in the range of [40°, 50°].

11. The foreign object scraping device of claim 9, wherein: When one edge of the scraping piece (11) is in contact with the side wall of the rotating structure, the included angle between the scraping piece (11) and the rotating structure is defined as the included angle between the surface of the scraping piece (11) located at the position facing the rotating structure and the opposite direction of the running direction of the rotating structure at the position of the one edge.

12. A method of installing a foreign object dislodging device, characterized by, The foreign matter scraping device is the foreign matter scraping device in any one of claims 1-11. The installation method comprises: Step A: when the scraping piece (11) is installed on the second sliding rod (122), the position of the second sliding rod (122) in the first direction is adjusted so that there is a gap between the scraping piece (11) and the rotating structure; Step B: after the installation of the scraping piece (11) is completed, the position of the second sliding rod (122) in the first direction is adjusted so that the scraping piece (11) is in contact with the side wall of the rotating structure; Step C: the first distance between the nut (14) and the guide structure facing the nut (14) is reduced by △L1 by adjusting the position of the nut (14) on the first sliding rod (121), and △L1 is a first preset value.

13. The installation method according to claim 12, wherein, The scraping piece (11) is detachably connected with the second sliding rod (122); the scraping piece (11) has K scraping segments, and the scraping piece (11) has K installation positions corresponding to the K scraping segments respectively, and K≥2; The installation method further comprises: when it is necessary to replace the scraping segment of the scraping piece (11), the following steps are performed: Step M1: the position of the nut (14) on the first sliding rod (121) is adjusted so that the first distance is increased by △L2, thereby causing a gap between the scraping piece (11) and the rotating structure, and △L2 is a second preset value; Step M2: the installation position of the scraping piece (11) is adjusted so that the scraping segment corresponding to the adjusted installation position is arranged towards the rotating structure; Step M3: the position of the nut (14) on the first sliding rod (121) is adjusted so that the first distance is reduced by △L3, and △L3 is a third preset value.

14. A welding system comprising a welding device (3) for welding a workpiece, characterized in that Further comprising the foreign matter scraping device in any one of claims 1-11, and the rotating structure is a first positioning wheel (2); the first positioning wheel (2) is used for limiting the workpiece, and is tangent to the side wall of the workpiece.

15. The welding system of claim 14, wherein: The welding system further comprises a first limiting mechanism (5), a second limiting mechanism (6), and a second positioning wheel (2A); the first limiting mechanism (5) and the second limiting mechanism (6) are both used for limiting the workpiece in the height direction of the welding system; in the running direction of the workpiece, the first limiting mechanism (5) and the second limiting mechanism (6) are located in front of and behind the welding device (3) respectively; the first positioning wheel (2) and the second positioning wheel (2A) are located on two sides of the workpiece respectively; the second positioning wheel (2A) is tangent to the side wall of the workpiece, thereby limiting the workpiece.

16. The welding system of claim 15, wherein: The workpiece comprises a first workpiece (100) and a second workpiece (200) arranged adjacently; the first positioning wheel (2) is located at a side of the first workpiece (100) far from the second workpiece (200) and is tangent to an outer wall of the first workpiece (100); the second positioning wheel (2A) is located at a side of the second workpiece (200) far from the first workpiece (100) and is tangent to an outer wall of the second workpiece (200); and the welding device (3) is used for welding the first workpiece (100) and the second workpiece (200) together.

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