Same-direction concave-convex roller blowing and scrap removing file

Abstract

The utility model provides a same-direction concave-convex roller blow-off scrap cleaning file. Comprising a file, a connecting base, a blow-off guide pipe and a rolling assembly. One end of the connecting seat is connected with the head end of the file; the blow-off guide pipe integrally penetrates through the connecting base, externally-connected compressed air is sprayed to the filing working face through the connecting base, and dust is blown and removed along the movement track of the file along with the file to clean the filing working face. The blow-off guide pipe is used for being connected with the grip, a two-way holding point is formed at the head end of the file, and the two-way holding point and a holding point of a file handle at the tail end of the file form two-point holding on the file. The rolling assembly is connected to the other end of the connecting base and provided with a roller, and a rolling supporting point is formed at the head end of the file. The idler wheels comprise a center wheel and side wheels, the center wheel and the side wheels on the two sides of the center wheel are distributed in parallel in the same direction, and when the center wheel ascends, the two side wheels make contact with the filing working face to form concave wheels; when the center wheel descends, the center wheel makes contact with the filing working face to form a cam, and the concave wheel and the cam are switched through ascending, descending and stretching of the center wheel.

Description

Technical Field

[0001] This utility model relates to files in the field of machinery, and more particularly to a file with unidirectional concave-convex rollers for blowing away chips. Background Technology

[0002] Shipbuilding is a complex field involving the processing and assembly of pipes made of various materials. High quality requirements are placed on the pipe end faces during construction, especially since shipbuilding typically employs segmented pre-assembly and modular fabrication methods. Pipes frequently require cutting during construction, particularly using tools like horizontal band saws, toothed saws, and handheld electric grinders, resulting in burrs on the cut ends. These burrs often require manual grinding. Metal burrs are generally hard, and manual grinding requires applying pressure to remove them. Controlling the grinding force, time, and angle is difficult and virtually unrestricted, leading to a high degree of freedom in manual grinding. However, standardizing the manual grinding process is challenging, making it difficult for process engineers to streamline and parameterize the process. The angle of the worker's hand is also unpredictable, resulting in varying grinding effects. Basic process guidelines are often not very practical, and operator training relies heavily on extensive experience, leading to long training periods and a significant impact on overall grinding quality.

[0003] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0004] 1. When using a file for manual polishing, uneven polishing depth is often observed, and the pipe wall is easily damaged due to an unstable grip on the polishing tool. Polishing damage to carbon steel pipes is generally not noticeable and has a relatively small impact on overall quality. However, the walls of bright stainless steel pipes, copper-plated iron pipes, copper pipes, and nuclear-grade pipes are very easily damaged. Once scratches, abrasions, or excessive polishing occur, the damage is generally irreversible and directly affects the pipe quality.

[0005] 2. Pipe construction often requires grinding of both the inner and outer walls. The inner wall of the pipe needs rolling support in the form of a cam, while the outer wall needs rolling support in the form of a concave wheel. Manual grinding often requires changing the concave wheel and cam. Knowing how to easily and quickly switch the working angle of the concave cam is very important for improving the working efficiency of the file.

[0006] 3. Metal particles generated during pipe grinding are easily adsorbed onto the pipe wall. During the grinding process, the dust particles cannot be removed in time, and when subjected to external pressure and friction, the dust particles are prone to damage to the pipe wall. Summary of the Invention

[0007] To address the shortcomings of existing technologies, specifically the issues of stable file grip, concave-convex roller switching, and the inability to promptly remove dust and debris, this application provides a co-directional concave-convex roller blowing and debris-removing file. This file utilizes a roller assembly to support the front end of the file, forming a rolling support point and enhancing file grip stability. Simultaneously, the rollers in the rolling assembly function as both concave rollers and cam switches. Compressed air can then blow away dust particles and debris through a debris-removing conduit, thus resolving the technical problems of file grip, concave-convex roller cam switching, and the inability to promptly remove dust and debris.

[0008] The solution adopted by the embodiments of this application to solve the technical problem is:

[0009] A unidirectional concave-convex roller blowing and cleaning file includes a file, a connecting seat, a blowing guide tube, and a rolling assembly;

[0010] The file is used for manual filing. One end of the connecting seat is connected to the head of the file to house it. The blow-out duct runs through the connecting seat, allowing compressed air to be sprayed from top to bottom onto the filing surface. This air accompanies the file's movement, blowing away dust and cleaning the surface. Simultaneously, the blow-out duct connects to the handle, creating a two-way grip point at the head of the file. This grip point, combined with the grip point on the file handle at the tail end, provides a two-point grip. The rolling assembly is connected to the other end of the connecting seat and contains rollers that provide support for rolling at the head of the file. These rollers include a center roller and side rollers, which are parallel and aligned in the same direction. When the center roller rises, the two side rollers contact the filing surface to form a concave roller. When the center roller descends, it contacts the filing surface to form a cam. The movement of the center roller—rising, falling, extending, and retracting—switches between the concave roller and the cam.

[0011] In order to further solve the technical problems to be solved by the embodiments of this application, the connecting seat provided in the embodiments of this application includes a file seat and a wheel seat;

[0012] A file holder is located at one end of the connecting seat, and a file slot is provided on the file holder for storing and inserting files; a wheel holder is located at the other end of the connecting seat, and a screw hole is provided in the middle of the wheel holder for adjusting and fixing the center wheel; center wheel grooves are provided on both sides of the screw hole for inserting the center wheel; and side wheel grooves are provided on the outer side of the center wheel groove for inserting side wheels.

[0013] Furthermore, the purge tube includes an inlet tube, an outlet tube, and an inner lumen;

[0014] The inner cavity is a sealed chamber located at the top of the connecting seat. The air inlet pipe is located at the top of the inner cavity for connecting to compressed air. At the same time, the air inlet pipe is used to connect to the handle, forming a two-way grip point at the head of the file. Together with the grip point at the tail end of the file handle, they work together to form a two-point grip on the file. The air outlet pipe is a downward-extending bundle of tubes located at the bottom of the inner cavity and passes through the connecting seat. Compressed air enters from top to bottom, enters through the air inlet pipe, is distributed in the inner cavity, and is ejected through the air outlet pipe to blow away dust and debris.

[0015] Furthermore, the end of the exhaust pipe is equipped with a guide nozzle to guide the outflowing gas.

[0016] Furthermore, the rolling assembly includes a center wheel, side wheels, and an adjusting screw;

[0017] The center wheel includes a center roller and a center wheel bracket; the center wheel bracket is a portal frame with the center roller connected to its lower end. The center wheel bracket is fitted into the center wheel groove of the wheel seat and can slide up and down within the center wheel groove; the upper end of the center wheel bracket has a screw hole for connecting to the wheel seat; the side wheel includes a side wheel roller and a side wheel bracket. The side wheel is fixed to the wheel seat through a side wheel groove; one end of the side wheel bracket is inserted into the side wheel groove of the wheel seat for fixation, and the other end is inserted into the center wheel groove of the wheel seat for fixation; the adjusting screw passes through the screw hole on the center wheel bracket and is screwed into the screw hole of the wheel seat to connect the center wheel to the wheel seat. The extension and retraction of the adjusting screw drives the raising and lowering of the center wheel, realizing the switching between the concave wheel and the cam.

[0018] Furthermore, the center roller and side rollers are made of nylon.

[0019] Positive effects: The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. Because the embodiments of this application adopt the technical means of connecting one end of the connecting seat to the head end of the file and setting the top of the connecting seat with the blow-out guide tube, when the handle is installed on the air inlet pipe, the corresponding handle can be selected to meet the needs of the file to select the file body for filing. It forms two gripping points with the file handle at the tail end of the file, which effectively solves the technical problem of holding the file stably in the prior art. When horizontal thrust and vertical pressure are applied to the file, the two gripping points can control the force, thereby achieving the technical effect of enhancing the stability during filing and improving the quality of the file filing.

[0021] 2. As this embodiment of the application adopts the technical means of connecting one end of the connecting seat to the head end of the file, and setting the top of the connecting seat with a blow-out conduit, compressed air connected to the blow-out conduit is sprayed from top to bottom through the connecting seat onto the filing working surface, which effectively solves the technical problem of cleaning dust in the prior art. The sprayed compressed air accompanies the file and follows the movement trajectory of the file to blow away dust and clean the filing working surface, avoiding dust from sticking to the file teeth and hindering the filing operation, thereby achieving the technical effect of blowing away dust at any time during filing.

[0022] 3. Because the embodiments of this application adopt the technical means of setting the rolling component at the front end of the connecting seat and providing rollers on the rolling component, the head end of the file has a rolling support point and can make linear motion, which effectively solves the technical problem of holding the file stably in the prior art. When the file is filing, it is guided by linear motion, which can be guided and the file can be held stably to maintain the balance and stability of the file, thereby achieving the technical effect of improving the filing quality.

[0023] 4. Because the embodiments of this application adopt the technical means of the central wheel and two side wheels of the rolling assembly being distributed in the same direction and parallel, and the central wheel and side wheels switching to form a concave cam, the mode switching of the concave cam can be formed by the extension and retraction of the central wheel as it rises and falls. The inner wall of the tube works in cam mode, and the outer wall of the tube works in concave wheel mode. This can simultaneously satisfy the working mode of concave wheel and cam, effectively solving the technical problem of switching between cam and concave wheel in the prior art. The concave wheel and cam can be switched to meet the filing requirements, thereby achieving the technical effect of improving the filing work efficiency.

[0024] 5. Because the embodiment of this application adopts the technical means of setting side wheels on both sides of the central wheel and the three wheels are distributed in the same direction, it effectively solves the technical problem of holding the file stably and guiding the file to move in a stable linear motion in the prior art. By adjusting the extension and retraction of the central wheel by adjusting the screw, the mode switching of the concave cam can be formed, which saves more space in the vertical direction, effectively reduces the interference between the rolling component and the pipe wall or surrounding obstacles, and also facilitates the daily storage of the device, thus achieving the technical effect of wide applicability.

[0025] 6. Since this application example adopts the technical means of blowing dust and debris in the same direction through the blowing duct, there is no need to adjust the blowing duct when switching between the concave wheel and cam working modes. This not only removes the dust and debris but also improves the overall working efficiency of the concave cam switching.

[0026] It is suitable for use as a file for blowing away debris using a unidirectional concave-convex roller. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is the southeast isometric view of this embodiment.

[0029] Figure 2 This is the isometric view of the southeast half section in this embodiment.

[0030] Figure 3 This is the southwest isometric view of this embodiment.

[0031] Figure 4 This is an isometric side view of the southwest half section of this embodiment.

[0032] Figure 5 This is the main view of this embodiment.

[0033] Figure 6 This is a half-section front view of this embodiment.

[0034] Figure 7 This is a top view of this embodiment.

[0035] Figure 8 This is the AA view of this embodiment.

[0036] Figure 9 This is the southeast isometric view of the connector.

[0037] Figure 10 This is a southeast isometric view of the connecting seat.

[0038] Figure 11 This is the southwest isometric view of the connector.

[0039] Figure 12 This is a southwest isometric view of the connecting seat.

[0040] Figure 13 This is a half-section front view of the connector.

[0041] Figure 14 This is the southeast isometric view of the center wheel.

[0042] Figure 15 This is an isometric view of the southeast side wheel.

[0043] In the picture:

[0044] 1. File;

[0045] 2. Connecting base,

[0046] 21. File holder,

[0047] 211. File slot,

[0048] 22. Wheel seat,

[0049] 221. Screw hole,

[0050] 222. Center wheel groove,

[0051] 223. Side wheel groove;

[0052] 3. Blow out the catheter.

[0053] 31. Intake pipe,

[0054] 32. Air outlet pipe

[0055] 321. Drain nozzle,

[0056] 33. Internal cavity;

[0057] 4. Scrolling component

[0058] 41. Center wheel,

[0059] 411. Center wheel bracket,

[0060] 412. Center roller,

[0061] 42. Side wheels,

[0062] 421. Side wheel bracket,

[0063] 422. Side rollers,

[0064] 43. Adjusting screw. Detailed Implementation

[0065] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0066] This application provides a unidirectional concave-convex roller blowing and cleaning file, which solves the problems of file 1 gripping, concave roller cam switching, and dust removal that are common in the prior art. First, a rolling assembly 4 is used in the file 1 to support the front end of the file 1 to form a rolling support point. At the same time, the center wheel 41 and side wheel 42 in the rolling assembly 4 can be freely switched to form a concave cam working mode, which can be switched at any time to meet the filing needs. Second, a blowing guide 3 is provided on the connecting seat 2 to blow away the dust and debris on the filing working surface, clean the filing chips, and prevent them from sticking to the filing teeth and hindering filing. Third, the air inlet pipe 31 of the blowing guide 3 can also be used as a handle to form a gripping point at the head end of the file 1 and a gripping point at the handle of the file 1 at the tail end, forming a two-point grip, which realizes the gripping stability of the file 1 and guides straight filing.

[0067] According to the instruction manual Figure 1-15 As shown, a unidirectional concave-convex roller blowing and cleaning file includes a file 1, a connecting seat 2, a blowing guide 3, and a rolling assembly 4;

[0068] File 1 is used for manual filing operations;

[0069] One end of the connecting seat 2 is connected to the head end of the file 1, and is used to receive the head end of the file 1;

[0070] The blow-out conduit 3 runs through the connecting seat 2. External compressed air is sprayed from top to bottom through the connecting seat 2 onto the filing surface. Along with the movement trajectory of the file 1, it blows away dust and cleans the filing surface. At the same time, the blow-out conduit 3 is used to connect the handle, forming a two-way grip point at the head end of the file 1. This meets the needs of the file 1 to select the file body for filing. Together with the grip point of the handle at the tail end of the file 1, it acts on the file 1 to form a two-point grip, applying horizontal thrust and vertical pressure to maintain the force balance of the file 1 for filing operations.

[0071] The rolling assembly 4 is connected to the other end of the connecting seat 2. A roller is provided in the rolling assembly to form a rolling support point at the head end of the file and guide the linear motion, thereby stably holding the file 1 for filing, thus avoiding damage to the workpiece to be filed and improving the quality of filing work.

[0072] The roller includes a center roller 41 and side rollers 42. The center roller 41 and the side rollers 42 on both sides of the center roller 41 are distributed in parallel and in the same direction. When the center roller 41 rises, the two side rollers 42 contact the filing working surface to form a concave roller. When the center roller 41 falls, the center roller 41 contacts the filing working surface to form a cam. By raising and lowering the center roller 41, the concave roller and the cam can be switched to meet the filing requirements.

[0073] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0074] Since the file 1 is equipped with a blow-off conduit 3 through the connecting seat 2, compressed air connected to the blow-off conduit 3 is sprayed from top to bottom through the connecting seat 2 onto the filing working surface. Therefore, the sprayed compressed air accompanies the file 1 and follows the movement trajectory of the file 1 to blow away dust and clean the filing working surface, preventing dust from sticking to the file teeth and hindering the filing operation, thus improving the quality and efficiency of filing.

[0075] Since the blow-out guide 3 can be used as a handle when the file is filing, it meets the needs of the file 1 to select the file body for filing. It forms two gripping points with the handle of the file 1 at the tail end of the file 1. Horizontal thrust and vertical pressure are applied to the file 1. The two gripping points can control the force, enhance the stability during filing, and improve the filing quality of the file 1.

[0076] Since the rolling component 4 is located at the front end of the connecting seat 2, the head end of the file 1 has a rolling support point and can make linear motion. When the file 1 is filing, it is guided by linear motion, which makes it directional. This allows the file 1 to be held stably for filing, maintaining the balance and stability of the file 1 and improving the quality of filing.

[0077] Since the central wheel 41 and the two side wheels 42 of the rolling assembly 4 are distributed in the same direction and parallel, the upward and downward extension of the central wheel 41 can form a mode switching of the concave cam. Therefore, the working mode of the concave wheel and the cam can be switched at any time to meet the filing requirements and improve the filing efficiency.

[0078] To ensure the stability of the structure in this embodiment, the connecting seat 2 includes a file seat 21 and a wheel seat 22;

[0079] The file holder 21 is a block structure and is located at one end of the connecting seat 2. A file slot 211 is provided on the file holder 21 for storing and inserting the file 1. In this embodiment, a screw is provided on the top of the file slot 211, and the file 1 is locked and fixed in the file slot 211 by the screw. The specific structure is not shown in the accompanying drawings of the specification.

[0080] The wheel seat 22 is a plate-shaped structure and is located at the other end of the connecting seat 2. A screw hole 221 is provided in the middle of the wheel seat 22 for adjusting and fixing the center wheel 41. Center wheel grooves 222 are provided on both sides of the screw hole 221 for inserting the center wheel 41. Side wheel grooves 223 are provided on the outer side of the center wheel grooves 222 for inserting the side wheels 42.

[0081] To further ensure the stability of the structure in this embodiment, the purging conduit 3 includes an inlet pipe 31, an outlet pipe 32, and an inner cavity 33;

[0082] The inner cavity 33 is a sealed cavity located at the top of the connecting seat 2 and is used to store compressed air;

[0083] The air intake pipe 31 is located at the top of the inner cavity 33 and is used to connect to compressed air. At the same time, the air intake pipe 31 is used to connect to the handle and form a two-way grip point at the head end of the file 1. Together with the grip point of the handle at the tail end of the file 1, they act on the file 1 to form a two-point grip. In this embodiment, the air intake pipe 31 can be used directly as a grip. In a preferred embodiment, the air intake pipe 31 is used to connect to the handle, that is, the handle is connected to the side of the air intake pipe 31. This is not shown in the accompanying drawings of this embodiment.

[0084] The vent pipe 32 is a downwardly extending bundle of tubes, located at the bottom of the inner cavity 33, and passes through the connecting seat 2;

[0085] Compressed air enters from top to bottom, connected through the air inlet pipe 31, distributed in the inner cavity 33, and sprayed out through the air outlet pipe 32 to blow away dust and debris.

[0086] To optimize the structure of this embodiment, a guide nozzle 321 is provided at the end of the air outlet pipe 32 to guide the outflowing gas, making the compressed air more concentrated, thereby achieving a better blowing effect.

[0087] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0088] Since the blow-out conduit 3 runs through the top, inner cavity, and bottom of the connecting seat 2, and the air inlet pipe 31 at the top of the connecting seat 2 is used to connect the handle and the introduction of compressed air, compressed air enters through the air inlet pipe 31, is distributed in the inner cavity 33, flows out from the air outlet pipe 32 at the bottom, and is sprayed onto the filing working surface through the guide nozzle 321 to blow away dust and debris, thus cleaning the working environment of filing and improving the quality and efficiency of filing.

[0089] To further optimize the structure of this embodiment, the rolling assembly 4 includes a center wheel 41, a side wheel 42, and an adjusting screw 43;

[0090] The center wheel 41 includes a center roller 412 and a center wheel bracket 411;

[0091] The center wheel bracket 411 is a portal frame with a center roller 412 connected to its lower end. The center wheel bracket 411 is assembled in the center wheel groove 222 of the wheel seat 22, and the center wheel bracket 411 can slide up and down in the center wheel groove 222. The upper end of the center wheel bracket 411 has a screw hole for connecting with the wheel seat 22.

[0092] The side wheel 42 includes a side wheel roller 422 and a side wheel bracket 421. The side wheel 42 is fixed to the wheel seat 22 through the side wheel groove 223. One end of the side wheel bracket 421 is inserted into the side wheel groove 223 of the wheel seat 22 for fixation, and the other end is inserted into the center wheel groove 222 of the wheel seat 22 for fixation.

[0093] The adjusting screw 43 passes through the screw hole on the center wheel bracket 411 and is screwed into the screw hole 221 of the wheel seat 22, connecting the center wheel 41 to the wheel seat 22. The center wheel 41 is raised or lowered by adjusting the height of the adjusting screw 43. When the center wheel 41 rises, the two side wheels 41 contact the filing working surface to form a concave wheel. When the center wheel 41 falls, the center wheel 41 contacts the filing working surface to form a cam, thereby realizing the switching between the concave wheel and the cam to meet the filing requirements.

[0094] As a standard technical choice, the center roller 412 and the side rollers 422 are made of nylon.

[0095] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0096] Since the center wheel 41 is provided with side wheels 42 on both sides and the three wheels are distributed in the same direction, the raising and lowering of the adjusting screw 43 can drive the raising and lowering of the center wheel 41. The raising and lowering of the center wheel 41 can switch the mode of the concave cam, and thus the working mode of the concave wheel and the cam can be switched to meet the filing requirements and improve the filing efficiency.

[0097] In this embodiment, file 1 is a semi-circular file used to remove burrs from the pipe end; center wheel 41 and side wheel 42 are both convex wheels.

[0098] Finally, it should be noted that:

[0099] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A chip-removing file with co-directional concave-convex rollers, characterized in that: Includes a file (1), a connecting seat (2), a blow-out conduit (3), and a rolling assembly (4); The file (1) is used for manual filing operations; One end of the connecting seat (2) is connected to the head end of the file (1) and is used to receive the head end of the file (1); The blow-off conduit (3) runs through the connecting seat (2) and external compressed air is sprayed from top to bottom through the connecting seat (2) onto the filing surface. Along with the movement trajectory of the file (1), it blows away dust and cleans the filing surface. At the same time, the blow-off conduit (3) is used to connect the handle and form a two-way grip point at the head end of the file (1). Together with the grip point of the handle at the tail end of the file (1), they act on the file (1) to form a two-point grip. The rolling assembly (4) is connected to the other end of the connecting seat (2). A roller is provided in the rolling assembly to form a rolling support point at the head end of the file. The rollers include a center roller (41) and side rollers (42). The center roller (41) and the side rollers (42) on both sides of the center roller (41) are distributed in parallel in the same direction. When the center roller (41) rises, the two side rollers (42) contact the filing working surface to form a concave roller. When the center roller (41) falls, the center roller (41) contacts the filing working surface to form a cam. The concave roller and the cam are switched by the rising, falling and extending of the center roller (41).

2. The chip-removing file with co-directional concave-convex rollers according to claim 1, characterized in that: The connecting seat (2) includes a file seat (21) and a wheel seat (22); The file holder (21) is located at one end of the connecting seat (2), and a file slot (211) is provided on the file holder (21) for storing the inserted file (1). The wheel seat (22) is located at the other end of the connecting seat (2). A screw hole (221) is provided in the middle of the wheel seat (22) for adjusting and fixing the center wheel (41). Center wheel grooves (222) are provided on both sides of the screw hole (221) for inserting the center wheel (41). Side wheel grooves (223) are provided on the outside of the center wheel groove (222) for inserting the side wheel (42).

3. The chip-removing file with co-directional concave-convex rollers according to claim 1, characterized in that: The blowout conduit (3) includes an inlet pipe (31), an outlet pipe (32), and an inner lumen (33); The inner cavity (33) is a sealed cavity and is located on the top of the connecting seat (2); The air inlet pipe (31) is located at the top of the inner cavity (33) for connecting to compressed air. At the same time, the air inlet pipe (31) is used to connect to the handle, forming a two-way grip point at the head end of the file (1), which, together with the grip point of the handle at the tail end of the file (1), acts on the file (1) to form a two-point grip. The air outlet pipe (32) is a downwardly extending bundle of tubes, located at the bottom of the inner cavity (33), and passes through the connecting seat (2). Compressed air enters from top to bottom, connected through the air inlet pipe (31), distributed in the inner cavity (33), and sprayed out through the air outlet pipe (32) to blow away dust and debris.

4. A chip-removing file with co-directional concave-convex rollers according to claim 3, characterized in that: The end of the gas outlet pipe (32) is provided with a guide nozzle (321) to guide the outflowing gas.

5. A chip-removing file with co-directional concave-convex rollers according to claim 3, characterized in that: The rolling assembly (4) includes a center wheel (41), a side wheel (42), and an adjusting screw (43). The center wheel (41) includes a center roller (412) and a center wheel bracket (411). The central wheel bracket (411) is a portal frame with a central roller (412) connected to its lower end. The central wheel bracket (411) is assembled in the central wheel groove (222) of the wheel seat (22), and the central wheel bracket (411) can slide up and down in the central wheel groove (222). The upper end of the central wheel bracket (411) has a screw hole for connecting with the wheel seat (22). The side wheel (42) includes a side wheel roller (422) and a side wheel bracket (421). The side wheel (42) is fixed to the wheel seat (22) through a side wheel groove (223). One end of the side wheel bracket (421) is inserted into the side wheel groove (223) of the wheel seat (22) for fixation, and the other end is inserted into the center wheel groove (222) of the wheel seat (22) for fixation. The adjusting screw (43) passes through the screw hole on the center wheel bracket (411) and is screwed into the screw hole (221) of the wheel seat (22) to connect the center wheel (41) with the wheel seat (22). The center wheel (41) is raised and lowered by the extension and retraction of the adjusting screw (43), thereby realizing the switching between the concave wheel and the cam.

6. A chip-removing file with co-directional concave-convex rollers according to claim 5, characterized in that: The center roller (412) and the side rollers (422) are made of nylon.

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