Foreign matter scraping device for rotating structure, mounting method of foreign matter scraping device and welding system

Abstract

The invention provides a foreign matter scraping device for a rotating structure, a mounting method of the foreign matter scraping device and a welding system. The foreign matter scraping device comprises a mounting seat fixed with a guide structure, a first sliding rod and a second sliding rod, and the first sliding rod and the second sliding rod are arranged in parallel at an interval; the guide structure is in clearance fit with the first sliding rod; the first sliding rod is fixedly connected with the second sliding rod through a connecting piece; a scraping piece is mounted at one end of the second sliding rod; the first sliding rod is sleeved with a nut and provided with an external thread matched with the nut. A spring is arranged between the nut and the guide structure facing the nut and arranged on the outer side of the first sliding rod in a sleeving mode, one end of the spring is installed on the nut, and the other end of the spring is installed 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] The invention belongs to the field of steel strip and band saw blade processing equipment, and specifically relates to a foreign matter scraping device for a rotating structure and an installation method and a welding system thereof, and relates to welding slag cleaning during band saw blade processing. Background Art

[0002] In the process of forming saw blades, it is necessary to use laser welding on two different steel strips (steel wire and steel strip), splice the steel wire and steel strip left and right, and then process them into saw blades. Among them, the tip of the saw blade is formed by steel wire and has hardness, so it can cut objects, while the back of the saw blade is formed by steel strip, which has flexibility and can drive the tip of the tooth to rotate. Laser welding is a Gaussian high-density energy body welding. When laser welding is used on two different materials, large sparks and molten particles of materials (commonly known as welding slag or spatter) will be generated.

[0003] In the steel strip and steel wire welding system, the thickness of the spliced ​​steel strip and steel wire is generally only 0.65-1.6mm, so when performing laser welding, a clamp and a positioning wheel must be used to ensure that the steel wire and the steel strip are on the same horizontal plane, otherwise the laser will not act on the joint surface of the two materials, making the weld weak and easily causing the saw blade to fail (tooth loss). The positioning wheel is used to avoid scratching the side wall of the steel wire by being tangent to the steel wire and rotating when the steel wire moves. The position of the positioning wheel is generally no more than 1.5mm away from the laser welding point, and the positioning wheel needs to rotate continuously and smoothly to ensure the smooth advancement of the steel wire. The welding slag spatter produced by laser welding can easily adhere to the positioning wheel, affecting the smooth rotation of the positioning wheel. When spatter adheres to the positioning wheel, the weld between the steel wire and the steel strip will have quality accidents such as nodules, sometimes wide and sometimes narrow, and poor welding.

[0004] In order to reduce the negative impact caused by the adhesion of slag splashes to the positioning wheel, the existing technology generally adopts the following methods: regularly apply high-temperature resistant vacuum silicone grease on the positioning wheel to reduce the adhesion of welding slag, or manually scrape the positioning wheel with a scraper every half an hour.

[0005] However, both the application of vacuum silicone grease and manual scraping require regular participation of personnel, which is inefficient, labor-intensive, and personnel are prone to omissions and forgetfulness. In addition, vacuum silicone 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 the welding position shifting, affecting the quality of the weld; (3) It produces smoke and dust that pollutes the laser welding head. Summary of the invention

[0006] The problem to be solved by the present invention is that in the existing steel strip and steel wire welding system, the method of applying vacuum silicone grease and manually scraping to remove welding slag is inefficient and labor-intensive, and a foreign matter scraping device for a rotating structure is provided.

[0007] In order to solve the above technical problem, the technical solution adopted by the present invention is: a foreign matter scraping device for a rotating structure, comprising a mounting seat (16), and also comprising a first sliding rod (121) and a second sliding rod (122), wherein the first sliding rod (121) and the second sliding rod (122) are arranged at intervals and are parallel to a first direction, and the first direction is the extension direction of the first sliding rod (121); At least one guide structure is fixed on the mounting seat (16); the guide structure is used to limit the first sliding rod (121) in the circumferential direction, and is used 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 and the first sliding rod (121) and the second sliding rod (122) are all clearance-matched; The first sliding rod (121) is fixedly connected to the second sliding rod (122) via a connecting piece (13); A scraper (11) is mounted on one end of the second sliding rod (122) for contacting the side wall of the rotating structure; The first sliding rod (121) is sleeved with a nut (14); the first sliding rod (121) is provided with an external thread (12A) that matches 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; 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); The nut (14) and the scraper (11) are both located on the same side of the guide structure facing the nut (14) (that is, one side of the guide structure).

[0008] Through the above arrangement, the first sliding rod and the second sliding rod are limited in the circumferential direction, so that the first sliding rod and the second sliding rod can only move forward and backward relative to the guide mechanism (i.e., move forward and backward along the first direction). By setting the external thread, the nut and the corresponding length, the position of the nut in the length direction of the external thread (i.e., the first direction) can be adjusted. When the nut is not rotated, the nut, the first sliding rod, the connecting member, and the second sliding rod form an integrated structure that moves together. When the nut is rotated, so that the distance between the nut and the guide structure toward the nut is reduced, the spring is compressed, and the spring generates a reaction elastic force to the nut, so that the nut has a tendency to move away from the guide structure, thereby driving the first sliding rod and the second sliding rod in the integrated structure to move in the same direction as the nut, or have a tendency to move in the same direction, so that the scraper can apply a greater abutment force to the outer wall of the rotating structure. When the nut rotates, so that the distance between the nut and the guide structure toward the nut increases, the spring is stretched, and the spring generates a reaction pulling force to the nut, so that the nut has a tendency to move toward the guide structure, thereby driving the first sliding rod and the second sliding rod in the integrated structure to move in the same direction as the nut, or have a tendency to move in the same direction, so that the scraper can apply a smaller abutment force to the outer wall of the rotating structure, or move in a direction away from the outer wall of the rotating structure. Through the above arrangement, the effect of adjusting the magnitude of the force applied by the scraper to the outer wall of the rotating structure can be achieved. Moreover, when the outer wall of the rotating structure is attached with welding slag with high hardness, so that the scraper cannot be removed at one time, the welding slag abuts against the scraper, so that the scraper moves in a direction away from the rotating structure, thereby compressing the spring. At this time, the retractable adjustment of the spring also avoids the phenomenon of the scraper and the rotating structure being stuck to each other when the scraper cannot scrape off the welding slag with high hardness and cannot retreat in the prior art, and will not cause excessive interference to the rotation of the rotating structure.

[0009] Furthermore, the guide structure comprises a fixing seat (17) fixed to the mounting seat (16); the fixing seat (17) is provided with a first through hole (171) and a second through hole (172) respectively arranged 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.

[0010] Through the above arrangement, the circumferential direction of the first sliding rod and the circumferential direction of the second sliding rod can be limited by the first through hole and the second through hole respectively, so that the first sliding rod and the second sliding rod can only move forward and backward.

[0011] In a preferred embodiment, at least two guide structures are arranged at intervals along the first direction.

[0012] Through the above arrangement, the first sliding rod and the second sliding rod are limited in the circumferential direction by the guide structure. At least two guide structures arranged at intervals along the first direction make the limiting effect of the first sliding rod and the second sliding rod higher, and the first sliding rod and the second sliding rod move more smoothly in the first direction.

[0013] In a preferred embodiment, 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 both arranged on the fixing seat (17).

[0014] By providing the first guide sleeve and the second guide sleeve, the limiting effect on the sliding rod is improved.

[0015] Furthermore, in the guide structure toward the nut (14), the fixing seat (17) comprises a detachably connected third guide sleeve (183) and a fixing seat base (17A); The fixed seat base (17A) is fixed to the mounting seat (16) and is sleeved on the outside of the third guide sleeve (183); the third guide sleeve (183) is used to mount the other end of the spring (15) and is sleeved on the outside of the first sliding rod (121); the first through hole (171) is provided on the inside of the third guide sleeve (183); When the third guide sleeve (183) and the fixed seat base (17A) are in a 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 a disconnected state, the third guide sleeve (183) can move relative to the fixed seat base (17A) in a direction away from the nut (14).

[0016] Through the above arrangement, when the scraper needs to be replaced, there is no need to remove the fixed seat. It is only necessary to make the third guide sleeve and the fixed seat base unconnected, so that the third guide sleeve can be moved relative to the fixed seat base in the direction away from the nut, so that the spring length is extended, thereby making the first sliding rod and the second sliding rod move together in the direction away from the rotating mechanism, so as to leave space between the scraper and the rotating mechanism, which is convenient for replacing the scraper.

[0017] In a preferred embodiment, the third guide sleeve (183) forms a protruding structure on the fixing seat base (17A) facing the nut (14).

[0018] Through the above arrangement, when the third guide sleeve and the fixed seat base are in an unconnected state, the raised third guide sleeve can be pushed in a direction away from the nut, so that the nut can move accordingly, and the overall structure of the nut, the first sliding rod and the second sliding rod can move in a direction away from the rotating structure.

[0019] In a preferred embodiment, the third guide sleeve (183) comprises a first end portion (1831), a connecting portion (1833), and a second end portion (1832) which are connected in sequence; the outer circumference of the first end portion (1831) and the outer circumference of the second end portion (1832) are both larger than the outer circumference 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), and the base through hole (173) comprises a mutually connected clearance groove (1731) and a guide sleeve matching section (1732), and the guide sleeve matching section (1732) is located at the clearance groove (1731) away from the nut (1732). 4) one side; the size of the clearance groove (1731) is adapted to the outer circumferential size 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 size of the first end portion (1831) and the outer circumferential size of the second end portion (1832) are both larger than the size of the guide sleeve matching section (1732), and the length of the connecting portion (1833) in the first direction is larger 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) contacts the fixed seat base (17A).

[0020] Through the above arrangement, when the scraper needs to be replaced, after the guide sleeve fixing piece is removed, the third guide sleeve can be moved relative to the fixed seat base in a direction away from the nut, and the third guide sleeve is prevented from being completely separated from the fixed seat base by limiting the position of the wall surface of the yield groove. In addition, after the scraper is replaced, the third guide sleeve is moved to a position where the second end contacts the fixed seat base, and the guide sleeve fastener can be used to fix the third guide sleeve to the fixed seat base, thereby avoiding the problem that the third guide sleeve and the fixed seat base are difficult to move back to a mutually fixed position after moving relative to each other.

[0021] 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.

[0022] Through the above arrangement, the nut can be unscrewed from the gap between the first sliding rod (121) and the rotating structure for replacement, and replacement of the scraper is also facilitated.

[0023] Furthermore, the first sliding rod (121) is fixedly connected to the second sliding rod (122) via the connecting member (13), and a position where the first sliding rod (121) is connected to the connecting member (13) and a position where the second sliding rod (122) is connected to the connecting member (13) are both located on the other side of the guide structure facing the nut (14).

[0024] Through the above arrangement, the first sliding rod, the connecting member and the second sliding rod are fixed to each other to form an integrated structure.

[0025] 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, and K≥2; When the scraper (11) is located at any j-th installation position among the K installation positions, the j-th scraper segment corresponding to the j-th installation position faces the side wall of the rotating structure, 1≤j≤K.

[0026] Through the above arrangement, when one scraper segment of the scraper is too worn to be used, the installation position of the scraper can be adjusted, and the other scraper segment of the scraper can be used to remove the welding slag on the surface of the rotating structure.

[0027] Preferably, the scraper is a polyhedral structure having at least four surfaces, and the scraping segments are edges in the polyhedral structure.

[0028] Preferably, when any one scraping segment of the scraper (11) contacts the side wall of the rotating structure, the range of the heading angle between the scraper (11) and the rotating structure is [15°, 75°].

[0029] More preferably, the range of the angle of contact between the scraper (11) and the rotating structure is: By setting the angle range to [40°, 50°], the scraper section has a better scraping effect on the welding slag on the side wall of the rotating structure. The applicant has found that setting the angle range to [40°, 50°] has a better scraping effect on the welding slag on the side wall of the rotating structure.

[0030] More preferably, when an 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 a surface of the scraper (11) located facing the rotating structure in a direction opposite to the direction of travel of the rotating structure at the location of the edge; the surface of the scraper (11) located facing the rotating structure is the surface where the edge is located.

[0031] According to the same inventive concept, the present invention also provides an installation method of a foreign matter scraping device, wherein the foreign matter scraping device is any of the foreign matter scraping devices described above.

[0032] The installation method comprises: Step A: when the scraper (11) is mounted on the second sliding rod (122), the position of the second sliding rod (122) in the first direction is adjusted so that a gap exists between the scraper (11) and the rotating structure; Step B: after the installation of the scraper (11) is completed, the position of the second sliding rod (122) in the first direction is adjusted so that the scraper (11) contacts the side wall of the rotating structure; Step C: by adjusting the position of the nut (14) on the first sliding rod (121), the first distance is reduced by ΔL1, ΔL1 being a first preset value, and the first distance being the distance between the nut (14) and the guide structure facing the nut (14); In the installation method, through the above-mentioned step A, the collision between the scraper and the rotating structure when the foreign matter scraping device is installed can be avoided. After the installation of the mounting seat is completed, the scraper can be made to contact the side wall of the rotating structure in step B, and then the position of the nut on the first sliding rod is adjusted in step C so that the nut compresses the spring, and the spring generates an elastic force on the nut, thereby driving the overall structure composed of the first sliding rod and the second sliding rod to have a tendency to move toward the rotating structure, so that the scraper installed on the second sliding rod can abut against the side wall of the rotating structure, so that the welding slag on the side wall of the rotating structure can be cleaned when the rotating structure rotates.

[0033] 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, and K≥2; The installation method further comprises: when it is necessary to replace the scraping section of the scraper (11), performing the following steps: Step M1: adjusting the position of the nut (14) on the first sliding rod (121) so that the first spacing increases by ΔL2, thereby creating a gap between the scraper (11) and the rotating structure, ΔL2 being a second preset value; Step M2: adjusting the installation position of the scraper (11) so that the scraping section corresponding to the adjusted installation position is arranged toward the rotating structure; Step M3: adjusting the position of the nut (14) on the first sliding rod (121) so that the first spacing is reduced by ΔL3, where ΔL3 is a third preset value.

[0034] Through the above arrangement, when the scraping section of the scraper needs to be replaced, the position of the nut is adjusted, that is, the nut is turned in the direction of stretching the spring, so that the first sliding rod can drive 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, thereby facilitating the adjustment of the scraping section of the scraper or the replacement of the scraper.

[0035] According to the same inventive concept, the present invention also provides a welding system, comprising a welding device (3) for welding a workpiece, and also comprising the above-mentioned foreign matter scraping device, wherein the rotating structure is a first positioning wheel (2); the first positioning wheel (2) is used to limit the position of the workpiece and is tangent to the side wall of the workpiece.

[0036] Furthermore, the welding system further comprises a first limiting mechanism (5), a second limiting structure (6), and a second positioning wheel (2A); 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 direction of travel of the workpiece, the first limiting mechanism (5) and the second limiting structure (6) are respectively located in front of and behind the welding device (3); The first positioning wheel (2) and the second positioning wheel (2A) are respectively located on two sides of the workpiece; The second positioning wheel (2A) is tangent to the side wall of the workpiece, thereby limiting the position of the workpiece.

[0037] Through the above arrangement, the first limiting mechanism and the second limiting mechanism are used to limit the workpiece in the height direction in front and behind the welding device, respectively, so as to ensure that the workpiece is fixed at the height of the welding position to avoid the problem of up and down deviation, and 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 top, bottom, left and right, so that at the welding position of the workpiece, the workpiece runs smoothly, avoiding the problem of the workpiece deviating up and down, left and right and affecting the welding quality.

[0038] Furthermore, the workpiece comprises a first workpiece (100) and a second workpiece (200) which are arranged adjacent to each other; The first positioning wheel (2) is located on a side of the first workpiece (100) away from the second workpiece (200), and is tangent to an outer wall of the first workpiece (100); The second positioning wheel (2A) is located on a side of the second workpiece (200) away from the first workpiece (100) and is tangent to an outer wall of the second workpiece (200); and the welding device (3) is used to weld the first workpiece (100) and the second workpiece (200) together.

[0039] Through the above arrangement, 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 wheels avoid damaging the side walls of the workpieces by rotating when the workpieces are moving.

[0040] The advantages and positive effects of the present invention are: 1. The present invention adopts a mechanical scraping design, which can reduce the consumption of machine materials (vacuum silicone grease).

[0041] 2. The present invention has little impact on the smooth operation of the steel wire, avoiding the problem of the steel wire sliding up and down on the positioning wheel when applying more vacuum silicone grease in the prior art, thereby reducing quality risks.

[0042] 3. Compared with the prior art method in which personnel inspect and scrape at regular intervals, the present invention reduces the frequency of personnel inspections, reduces the impact on production efficiency, improves single-step production efficiency, and significantly reduces quality risks compared with personnel inspection and scraping omissions.

[0043] 4. The present invention reduces the probability of poor welding quality accidents caused by the positioning wheel getting stuck, and can extend the service life of the positioning wheel. Compared with the prior art in which personnel scrape at regular intervals, the present invention can reduce the accumulation of welding slag and spatter on the positioning wheel through the uninterrupted scraping of the foreign matter scraping device; 5. The present invention has been verified to have a good slag removal effect and a long sustainable use time, which not only solves the problem of short service life of the positioning wheel, but also reduces quality risks such as poor welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 is a schematic diagram of a partial three-dimensional structure of a welding system in Example 1 of the present invention; Figure 2 yes Figure 1 A magnified view of the M structure; Figure 3 yes Figure 1 Partial top view of the welding system; Figure 4 It is viewed from one direction Figure 1 A three-dimensional structural diagram of the foreign body scraping device; Figure 5 yes Figure 4AA cross-sectional view of ; Figure 6 It's from the other direction. Figure 1 A three-dimensional structural diagram of the foreign body scraping device; Figure 7 From another direction Figure 1 A three-dimensional structural diagram of the foreign body scraping device; Figure 8 yes Figure 4 A front view of the foreign body scraping device; Fig. 9 yes Figure 4 A bottom view of the foreign body scraping device; Fig.10 yes Figure 4 A side view of the foreign body scraper; Fig.11 In Example 2 of the present invention, Figure 5 AA cross-sectional view of ; Fig.12 In Example 3 of the present invention, Figure 5 AA cross-sectional view of ; Fig.13 yes Fig.12 The schematic diagram after removing the third guide sleeve; Fig.14 yes Fig.12 Schematic diagram of the third guide sleeve.

[0046] In the above drawings, the scraper 11; the surface 11a; the scraper fastener 111; the first edge f1; the second edge f2; the first sliding rod 121; the second sliding rod 122; the external thread 12A; the connecting member 13; the nut 14; the spring 15; the mounting seat 16; the fixing seat 17; the fixing seat base 17A; the guide sleeve fastener 17B; the first through hole 171; the second through hole 172; the base through hole 173; the clearance groove 1731; the guide sleeve matching section 1732; the first guide sleeve 18 1; second guide sleeve 182; third guide sleeve 183; first end portion 1831; second end portion 1832; connecting portion 1833; first positioning wheel 2; first positioning wheel side wall 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 DESCRIPTION

[0047] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] like Figure 1-Figure 10 As shown, the present invention provides a foreign matter scraping device for a rotating structure, comprising a mounting seat 16, and also 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 a first direction, and the first direction 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., Figure 1 ). In the present invention, foreign matter refers to foreign matter adhered to the surface of the rotating structure, such as welding slag splashed onto and adhered to the surface of the rotating structure when the welding device 3 welds the workpiece.

[0049] like Figure 6 As shown, two guide structures are fixed to the mounting seat 16. The guide structures are 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 structures are clearance-matched with the first sliding rod 121 and the second sliding rod 122.

[0050] The first sliding rod 121 is fixedly connected to the second sliding rod 122 via a connecting member 13 .

[0051] The second sliding rod 122 has a scraper 11 mounted on one end thereof 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 matter on the side wall of the rotating structure. In this embodiment, the side wall of the rotating structure is the side wall 21 of the first positioning wheel.

[0052] The first sliding rod 121 is sleeved with a nut 14. The first sliding rod 121 is provided with an external thread that matches 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) can be set to be greater than the length of the nut 14 in the first direction (that is, the extension length of the nut 14 in the first direction). That is, the size of the external thread 12A projected in the first direction is greater than the size of the nut 14 projected in the first direction. The nut 14 can move along the external thread 12A, so that the spacing between the nut 14 and the guide structure facing the nut 14 can be adjusted. The first direction is the length direction of the first sliding rod 121.

[0053] A spring 15 is provided between the nut 14 and a guide structure toward the nut 14 (i.e., a guide structure that is 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 toward the nut 14 (can be installed on the guide structure toward the nut 14).

[0054] The guide structure toward 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 connecting member 13. The guide structure toward the nut 14 is located between the nut 14 and the connecting member 13, and between the scraper 11 and the connecting member 13.

[0055] 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.

[0056] The guide structure includes a fixing seat 17 fixed to the mounting seat 16, a first guide sleeve 181, and a second guide sleeve 182. The fixing 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 first sliding rod 121 and the outer wall of the first through hole 171 are clearance-matched, and the second sliding rod 122 and the outer wall of the second through hole 172 are clearance-matched. 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.

[0057] In this embodiment, two guide structures are arranged at intervals along the first direction. Of course, three or more guide structures may also be arranged.

[0058] A first guide sleeve 181 is disposed on at least one side of the first through hole 171 , and a second guide sleeve 182 is disposed on at least one side of the second through hole 172 .

[0059] The first guide sleeve 181 and the second guide sleeve 182 are both disposed on the fixing seat 17 .

[0060] The first guide sleeve 181 is clearance-matched with the first sliding rod 121 , and the second guide sleeve 182 is clearance-matched with the second sliding rod 122 .

[0061] The external threads on the nut 14 and the first sliding rod 121 are both arranged 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 through the connecting member 13. The first sliding rod 121 is fixedly connected to the second sliding rod 122 through the connecting member 13, and the position where the first sliding rod 121 is connected to the connecting member 13 and the position where the second sliding rod 122 is connected to the connecting member 13 are both located on the other side of the guide structure facing the nut 14. In this embodiment, all the guide structures are located between the scraper 11 and the connecting member 13, and between the nut 14 and the connecting member 13.

[0062] 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.

[0063] When the scraper 11 is located at any j-th installation position among the K installation positions, the j-th scraper segment corresponding to the j-th installation position faces the side wall of the rotating structure, 1≤j≤K.

[0064] Preferably, the scraper 11 is a polyhedral structure having at least four surfaces, and the scraper segments are edges of the polyhedral structure. The scraper 11 may be a rectangular parallelepiped structure, that is, the scraper segments are edges of the rectangular parallelepiped. In this embodiment, a groove is formed on a rectangular parallelepiped, and another rectangular parallelepiped 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 scraping segments. That is, when scraping the rotating structure, the edges of the polyhedral structure are parallel to the rotating axis of the rotating structure. Figure 1 In the view shown, the first edge f1 is used as a scraping section to scrape the welding slag on the side wall of the rotating structure. After rotating the scraper 11 by 180 degrees, the second edge f2 can also be used as a scraping section. When the edge contacts the side wall of the first positioning wheel 2, the edge is parallel to the axis of the rotating structure.

[0065] When any scraping section of the scraper 11 contacts the side wall of the rotating structure, the range of the angle between the scraper 11 and the rotating structure is [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 range of the angle between the scraper (11) and the rotating structure is [40°, 50°].

[0066] When an edge of the scraper 11 contacts the side wall of the rotating structure, the head-on angle between the scraper 11 and the rotating structure is defined as: the angle between the surface of the scraper 11 located head-on to the rotating structure in the direction opposite to the direction of travel of the rotating structure at the edge; the surface of the scraper 11 located head-on to the rotating structure is the surface where the edge is located.

[0067] like Figure 3 As shown, when the first edge f1 of the scraper 11 (as a scraping section) contacts the side wall of the rotating structure (i.e., the first positioning wheel side wall 21), the contact position Wa is located on the first edge f1, i.e., the first edge f1 is the position where the scraper 11 is tangent to the first positioning wheel 2. Figure 3 , the facing angle θ between the scraper 11 and the rotating structure is: the angle between the direction La opposite to the traveling direction Lc (i.e. the traveling direction at the tangent position Wa) of the first positioning wheel 2 at the position where the first edge f1 is located, and the surface 11a of the scraper 11 located at the facing position of the rotating structure, that is, the angle between the direction La and the surface 11a, or the angle between the direction La and the direction Lb, the 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 located at the facing position of the first positioning wheel 2 is the surface where the first edge f1 is located.

[0068] Based on the same inventive concept, the present invention also provides an installation method of a foreign matter scraping device, and the foreign matter scraping device is the foreign matter scraping device mentioned above.

[0069] The installation method comprises: Step A: When the scraper 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 scraper 11 and the rotating structure.

[0070] Step B: After the installation of the scraper 11 is completed, the position of the second sliding rod 122 in the first direction is adjusted so that the scraper 11 contacts the side wall of the rotating structure.

[0071] Step C: By adjusting the position of the nut 14 on the first sliding rod 121, the first spacing is reduced by ΔL1, ΔL1 being a first preset value, and the first spacing being the spacing between the nut 14 and the guide structure facing the nut 14. The first preset value can be determined according to the required abutment force of the scraper 11 on the side wall of the rotating structure. The larger / smaller the first preset value, the larger / smaller the abutment force of the scraper 11 on the side wall of the rotating structure.

[0072] 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.

[0073] The installation method further includes: when the scraping section of the scraper 11 needs to be replaced, for example, the first edge f1 needs to be replaced with the second edge f2 for scraping, the following steps are performed: Step M1: adjusting the position of the nut 14 on the first sliding rod 121 so that the first spacing increases by ΔL2, thereby creating a gap between the scraper 11 and the rotating structure, ΔL2 being a second preset value.

[0074] Step M2: adjusting the installation position of the scraper 11 so that the scraping segment (ie, the second edge f2 ) corresponding to the adjusted installation position is disposed toward the rotating structure.

[0075] Step M3: adjusting the position of the nut 14 on the first sliding rod 121 so that the first spacing is reduced by ΔL3, where ΔL3 is a third preset value, that is, the second edge f2 contacts the side wall of the first positioning wheel 2, thereby scraping foreign matter on the side wall of the first positioning wheel 2.

[0076] In this embodiment, the scraper 11 can be fixed to the second sliding rod 122 by a scraper fastener 111 (such as a bolt). The installation position of the scraper 11 can be adjusted by adjusting the rotation position of the bolt. In order to ensure that the scraper is relatively stable at each installation position and avoid large shaking, for example, the bolt can be matched with a spring to achieve stability at each screwing position of the bolt. In addition, the surface of the polyhedral structure facing the second sliding rod 122 and the extension direction of the second sliding rod 122 can also be set to an angle range of 15 degrees to 45 degrees, such as Fig. 9 When the polyhedron is rotated to each installation position, 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 greatly during scraping.

[0077] The second preset value can be set according to the requirement that the second sliding rod 122 moves rightward 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 the setting of the first preset value, that is, it can be determined according to the required abutment force of the scraper 11 on the side wall of the rotating structure.

[0078] Based on the same inventive concept, the present invention further provides a welding system, comprising the above-mentioned foreign matter scraping device, wherein the rotating structure is a first positioning wheel 2. The first positioning wheel 2 is tangent to the side wall of the workpiece.

[0079] The first positioning wheel 2 is used to be tangent to the side wall of the workpiece. The speed of the first positioning wheel 2 on the tangent line and the speed of the second positioning wheel 2A on the tangent line are preferably the same as the travel speed of the first workpiece and the second workpiece.

[0080] like Figure 1-Figure 3As shown, the welding system also 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 direction of travel of the workpiece, the first limiting mechanism 5 and the second limiting structure 6 are respectively located in front of and behind the welding device 3. The first positioning wheel 2 and the second positioning wheel 2A are respectively 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.

[0081] The workpieces include a first workpiece 100 and a second workpiece 200 that are adjacent to each other. The first positioning wheel 2 is located on a side of the first workpiece 100 that is away from the second workpiece 200 and is in contact with the outer wall ( 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 is the right side wall of the second workpiece 200, Figure 1 The welding device 3 is used to weld the first workpiece 100 and the second workpiece 200 whose top surfaces are located in the same plane together to form an integrated structure. The welding position W1 of the welding device 3 is located between the first workpiece 100 and the second workpiece 200, such as Figure 3 shown.

[0082] In the present invention, the steel strip and the steel wire move side by side along the running direction. The steel strip and the steel wire are laser welded at the welding position W1, and the two are welded together, and then the tooth tip of the band saw blade is formed by milling the position of the steel wire of the welded structure.

[0083] 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, and the first limiting member 51 and the second limiting member 52 constitute a clamping structure for clamping the first workpiece 100 and the second workpiece 200 at the same time; the second limiting structure 6 includes a first roller 61 and a second roller 62 located above and below the workpiece, respectively, and the first roller 61 and the second roller 62 are in rolling contact with the workpiece; the workpiece guide mechanism 4 can be a mechanism for clamping the workpiece. The mounting seat 16 can be fixed on the side wall of the workpiece guide mechanism 4. The first limiting member 51 and the second limiting member 52 can be fixed on the wall of the workpiece guide 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 stopper 51 and the second stopper 52 can ensure that the running plane of the steel strip and the steel wire is a horizontal plane, thereby preventing the steel strip from tilting and affecting the welding effect.

[0084] The following is a further detailed description of Example 1.

[0085] When laser welding a composite steel strip (i.e., a structure formed by welding a steel strip and a steel wire arranged side by side), a positioning wheel is required to keep the position of the steel strip fixed so as to achieve continuous welding. Large molten slag and spatter will be generated during laser welding. When the slag spatter adheres to the fixture, it will affect the stability of laser welding and the strength of the weld. The present invention is used to remove and solve the adhesion to the fixture during laser welding. The present invention mainly solves the problem of cleaning the slag spatter adhered to the first positioning wheel 2 during continuous laser welding of the steel strip. The present invention can be used for steel strip or saw blade products.

[0086] The device of the present invention uses a spring as a pressure source, which has certain buffering and adjustable functions. It adjusts the force of the foreign matter scraping device (also called scraping device) on the positioning wheel by adjusting the advance and retreat of the nut at the front end of the spring device. The scraper 11 can be made of a hard alloy block structure, which is wear-resistant and hard.

[0087] The foreign body scraping device and the positioning wheel can be designed at an angle of 40 degrees, so that the hard carbide cutting edge (i.e., the edge of the scraper 11) directly fits the positioning wheel, and the force at this angle is on the inner side of the positioning wheel. When a slightly larger welding slag melt is accidentally encountered, the positioning wheel will not be immediately stuck due to the action of the spring 15, avoiding stopping its rotation.

[0088] The foreign body scraping device uses two cross bars (ie, the first sliding bar 121 and the second sliding bar 122) connected in parallel to generate a certain supporting force and ensure that the device can move left and right flexibly and reliably.

[0089] The hard alloy of the foreign body scraping device is divided into multiple surfaces including front, rear, left and right. The edges therein can be selected to be used as scraping sections and can be replaced according to the wear and tear of the scraping sections.

[0090] The specific installation and use method of the foreign matter scraping device of the present invention is as follows: a. The carbide polyhedron with a circular hole in the middle (i.e., the scraper 11) is fixed to the head of the foreign matter scraping device using screws (i.e., the scraper fastener 111), that is, the screw can be fixed in the circular hole.

[0091] b. Then, place the edge of the polyhedron (i.e., the first edge f1) close to the first positioning wheel 2.

[0092] d. Then slowly adjust the position of the nut 14, and adjust the nut 14 clockwise so that the scraper 11 is closer to the first positioning wheel 2, until the fine welding slag can be scraped off.

[0093] e. When replacing the scraper segment (i.e., the edge of the polyhedron used to contact the welding slag on the outer wall of the first positioning wheel 2), adjust the nut counterclockwise until the scraper 11 cannot stick to the first positioning wheel 2 (i.e., there is a gap between the scraper 11 and the first positioning wheel).

[0094] f. Rotate the screws used to fix the scraper 11 by a certain angle, replace the scraping section of the scraper 11 (i.e. replace the edge in contact with the welding slag on the outer wall of the first positioning wheel 2), and the scraper 11 can be used again.

[0095] In the present invention, when it is necessary to increase the pressure of the scraper 11 on the first positioning wheel 2, the nut 15 can be screwed to reduce the distance between the nut 15 and the fixing seat 17 set toward the nut, and the spring 15 is compressed, that is, the pressure applied by the spring 15 on the nut 14 increases, and the 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 on the outer wall of the positioning wheel 2.

[0096] When it is necessary to reduce the pressure of the scraper 11 on the first positioning wheel 2, the nut 15 can be screwed to increase the distance between the nut 15 and the fixing seat 17 set toward the nut, and the spring 15 is extended, that is, the pressure applied by the spring 15 on the nut 14 is reduced. The 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 less pressure on the outer wall of the positioning wheel 2.

[0097] After the foreign matter 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 a compressed state and a stretched state), or in a compressed state.

[0098] If the welding slag attached to the outer side of the first positioning wheel 2 is stubborn and cannot be completely removed by one scraping, the welding slag on the first positioning wheel 2 will push the scraper 11 to the right, and at this time the first sliding rod 121 drives the nut 14 to move to the right, so that the spring 15 is compressed to avoid the problem of the first positioning wheel 2 being stuck. The compressed spring 15 generates a restoring force to the left, which can still keep the scraper 11 in good contact with the outer wall of the first positioning wheel.

[0099] The purpose of the two sliding rods (i.e., the first sliding rod 121 and the second sliding rod 122) provided in the present invention is: if the nut 14 is installed between the scraper 11 and the fixing seat 17, then after the foreign matter scraping device of the present invention is installed, the scraper 11 is in contact with the positioning wheel. If the scraper 11 is worn out and needs to be replaced, it is difficult to disassemble the scraper 11, that is, it is easy to hit the first positioning wheel 2 during disassembly, and it is easy to damage the first positioning wheel 2. After the nut 14 is disassembled, the first sliding rod 121 and the second sliding rod 122 can be moved to the right together, so that a gap can be left between the scraper 11 and the first positioning wheel 2, which is convenient for disassembling and replacing the scraper 11.

[0100] Example 2 Figure 1-Figure 4 , Figure 6-Figure 10 It is also used as a structural diagram of Example 2. Fig.11 replace Figure 5 , as Figure 4 AA section view.

[0101] The difference between the second embodiment and the first embodiment is that, in the guide structure toward the nut 14, the fixed seat 17 includes a detachably connected third guide sleeve 183 and a fixed seat base 17A. The fixed seat base 17A is fixed to the mounting seat 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. The inner side of the third guide sleeve 183 is provided with the first through hole 171 for clearance fit with the first sliding rod 121. When the third guide sleeve 183 and the fixed seat base 17A are in a connected state, the third guide sleeve 183 is fixed to the fixed seat base 17A by the guide sleeve fastener 17B. When the third guide sleeve 183 and the fixed seat base 17A are not connected, the third guide sleeve 183 can move relative to the fixed seat base 17A in a direction away from the nut 14. The third guide sleeve 183 forms a convex structure toward the nut 14 on the fixed seat base 17A.

[0102] Regarding other structures of this embodiment, please refer to the contents in Embodiment 1.

[0103] Example 3 Figure 1-Figure 4 , Figure 6-Figure 10 This is also used as a structural diagram of Example 3. Fig.12 replace Figure 5 , as Figure 4AA cross-sectional view. The difference between this embodiment 3 and embodiment 2 is mainly that: the third guide sleeve 183 includes a first end 1831, a connecting portion 1833, and a second end 1832 connected in sequence. The outer circumference size of the first end 1831 and the outer circumference size of the second end 1832 are both larger than the outer circumference size 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, and the base through hole 173 includes a mutually connected clearance groove 1731 and a guide sleeve matching section 1732, 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 circumference size of the first end 1831, and the size of the guide sleeve matching section 1732 is adapted to the size of the connecting portion 1833. The outer circumference size of the first end 1831 and the outer circumference size of the second end 1832 are both larger than the size of the guide sleeve matching section 1732, and the length of the connecting portion 1833 in the first direction is larger than the length of the guide sleeve matching section 1732 in the first direction. That is, the size of the connecting portion 1833 projected in the first direction is larger than the size of the guide sleeve matching section 1732 projected 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 1832 contacts the fixed seat base 17A.

[0104] like Figure 12-14 As shown, when the third guide sleeve 183 is fixedly connected to the fixed seat base 17A by the guide sleeve fastener 17B, the wall of the fixed seat base 17A facing away from the nut 14 contacts the second end 1832. Since 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, in the first direction, there is still a gap between the first end 1831 and the wall of the clearance groove 1731 (that is, the wall arranged toward the first end 1831), that is, at least part of the clearance groove 1731 is not occupied, so that when the third guide sleeve 183 needs to move relative to the fixed seat base 17A in the direction away from the nut 14, the first end 1831 can extend into the clearance groove 1731, and the wall of the clearance groove 1731 serves to limit the first end 1831. When the first end 1831 contacts the wall surface of the clearance groove 1731 facing the first end 1831, there is a gap between the scraper 11 and the rotating structure, so that the scraper 11 can be removed from the second sliding rod 122. Fig.12 As shown, when the second end 1832 contacts the fixed seat base 17A, the through hole opened in the fixed seat 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 above-mentioned through hole and groove, thereby fixing the guide sleeve fastener 17B to the fixed seat base 17A.

[0105] Figure 12-14In the embodiment, the through holes or grooves corresponding to the guide sleeve fasteners opened on the third guide sleeve and the fixed seat base are omitted. The setting of the guide sleeve fasteners can refer to Fig.11 In addition, additional fasteners (also not shown) may be provided on the sidewall of the third guide sleeve 183 along the first direction to fasten the third guide sleeve and the fixed seat base, thereby achieving a better effect of fixing the third guide sleeve and the fixed seat base to each other.

[0106] Regarding other structures of this embodiment, please refer to the contents of Embodiment 1 and Embodiment 2.

[0107] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0108] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention should still be included in the scope of the present invention. After reading the present invention, the modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Claims

1. A foreign matter scraping device for a rotating structure, comprising a mounting seat (16), characterized in that: It also comprises a first sliding rod (121) and a second sliding rod (122), wherein the first sliding rod (121) and the second sliding rod (122) are arranged at intervals and are parallel to a first direction, and the first direction is an extending direction of the first sliding rod (121); At least one guide structure is fixed on the mounting seat (16); the guide structure is used to limit the first sliding rod (121) in the circumferential direction, and is used 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 and the first sliding rod (121) and the second sliding rod (122) are all clearance-matched; The first sliding rod (121) is fixedly connected to the second sliding rod (122) via a connecting piece (13); A scraper (11) is mounted on one end of the second sliding rod (122) for contacting the side wall of the rotating structure; The first sliding rod (121) is sleeved with a nut (14); the first sliding rod (121) is provided with an external thread (12A) that matches 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; A spring (15) is provided between the nut (14) and the guide structure toward 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 toward the nut (14); The nut (14) and the scraper (11) are both located on one side of the guide structure facing the nut (14).

2. The foreign matter scraping device according to claim 1, characterized in that: The guide structure comprises a fixing seat (17) fixed to the mounting seat (16); the fixing 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; Preferably, at least two guide structures are arranged at intervals along the first direction; Preferably, 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 both arranged on the fixing seat (17).

3. The foreign matter scraping device according to claim 2, characterized in that: In the guide structure toward the nut (14), the fixing seat (17) comprises a detachably connected third guide sleeve (183) and a fixing seat base (17A); The fixed seat base (17A) is fixed to the mounting seat (16) and is sleeved on the outside of the third guide sleeve (183); the third guide sleeve (183) is used to mount the other end of the spring (15) and is sleeved on the outside of the first sliding rod (121); the first through hole (171) is provided on the inside of the third guide sleeve (183); When the third guide sleeve (183) and the fixed seat base (17A) are in a 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 a disconnected state, the third guide sleeve (183) can move relative to the fixed seat base (17A) in a direction away from the nut (14); Preferably, the third guide sleeve (183) forms a protruding structure on the fixing seat base (17A) facing the nut (14); Preferably, the third guide sleeve (183) comprises a first end portion (1831), a connecting portion (1833), and a second end portion (1832) which are connected in sequence; the outer circumference of the first end portion (1831) and the outer circumference of the second end portion (1832) are both larger than the outer circumference of the connecting portion (1833), so that the third guide sleeve (183) as a whole forms an I-shaped structure; a base through hole (173) is provided on the fixed seat base (17A), and the base through hole (173) comprises a mutually connected clearance groove (1731) and a guide sleeve matching section (1732), and the guide sleeve matching section (1732) is located at the side of the clearance groove (1731) away from the nut (14). one side; the size of the clearance groove (1731) is adapted to the outer circumferential size of the first end portion (1831); the size of the guide sleeve matching section (1732) is adapted to the size of the connecting portion (1833); the outer circumferential size of the first end portion (1831) and the outer circumferential size of the second end portion (1832) are both larger than the size of the guide sleeve matching section (1732); the length of the connecting portion (1833) in the first direction is larger 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) contacts the fixed seat base (17A).

4. The foreign matter scraping device according to any one of claims 1 to 3, characterized in that: 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.

5. The foreign matter scraping device according to any one of claims 1 to 3, characterized in that: The position where the first sliding rod (121) is connected to the connecting piece (13), and the position where the second sliding rod (122) is connected to the connecting piece (13) are both located on the other side of the guide structure facing the nut (14).

6. The foreign matter scraping device according to any one of claims 1 to 3, characterized in that: 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 is greater than or equal to 2; When the scraper (11) is located at any j-th installation position among the K installation positions, the j-th scraper segment corresponding to the j-th installation position faces the side wall of the rotating structure, 1≤j≤K; Preferably, the scraper (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 scraper (11) contacts the side wall of the rotating structure, the range of the angle of contact between the scraper (11) and the rotating structure is [15°, 75°]; the extending 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 range of the angle of contact between the scraper (11) and the rotating structure is [40°, 50°]; More preferably, when an 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 a surface of the scraper (11) located facing the rotating structure in a direction opposite to the direction of travel of the rotating structure at the location of the edge; the surface of the scraper (11) located facing the rotating structure is the surface where the edge is located.

7. A method for installing a foreign matter scraping device, characterized in that: The foreign matter scraping device is a foreign matter scraping device as described in any one of claims 1 to 6; The installation method comprises: Step A: when the scraper (11) is mounted on the second sliding rod (122), the position of the second sliding rod (122) in the first direction is adjusted so that a gap exists between the scraper (11) and the rotating structure; Step B: after the installation of the scraper (11) is completed, the position of the second sliding rod (122) in the first direction is adjusted so that the scraper (11) contacts the side wall of the rotating structure; Step C: By adjusting the position of the nut (14) on the first sliding rod (121), the first spacing is reduced by ΔL1, ΔL1 being a first preset value, and the first spacing being the spacing between the nut (14) and the guide structure facing the nut (14).

8. The installation method according to claim 7, characterized in that: 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 is greater than or equal to 2; The installation method further comprises: when it is necessary to replace the scraping section of the scraper (11), performing the following steps: Step M1: adjusting the position of the nut (14) on the first sliding rod (121) so that the first spacing increases by ΔL2, thereby creating a gap between the scraper (11) and the rotating structure, ΔL2 being a second preset value; Step M2: adjusting the installation position of the scraper (11) so that the scraping section corresponding to the adjusted installation position is arranged toward the rotating structure; Step M3: adjusting the position of the nut (14) on the first sliding rod (121) so that the first spacing is reduced by ΔL3, where ΔL3 is a third preset value.

9. A welding system, comprising a welding device (3) for welding a workpiece, characterized in that: It also comprises the foreign matter scraping device according to any one of claims 1 to 6, wherein the rotating structure is a first positioning wheel (2); the first positioning wheel (2) is used to limit the position of the workpiece and is tangent to the side wall of the workpiece.

10. The welding system according to claim 9, characterized in that: The welding system further comprises a first limiting mechanism (5), a second limiting structure (6), and a second positioning wheel (2A); the first limiting mechanism (5) and the second limiting structure (6) are both used to limit the position of the workpiece in the height direction of the welding system; in the direction of travel of the workpiece, the first limiting mechanism (5) and the second limiting structure (6) are respectively located in front of and behind the welding device (3); the first positioning wheel (2) and the second positioning wheel (2A) are respectively located on both sides of the workpiece; the second positioning wheel (2A) is tangent to the side wall of the workpiece, thereby limiting the position of the workpiece; Preferably, the workpieces include a first workpiece (100) and a second workpiece (200) which are arranged adjacent to each other; the first positioning wheel (2) is located on a side of the first workpiece (100) away from the second workpiece (200) and is tangent to an outer wall of the first workpiece (100); the second positioning wheel (2A) is located on a side of the second workpiece (200) away from the first workpiece (100) and is tangent to an outer wall of the second workpiece (200); and the welding device (3) is used to weld the first workpiece (100) and the second workpiece (200) together.

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