A device for cleaning burrs on the inner wall of a square tube

Abstract

The present application relates to the technical field of pipe processing, in particular to a cleaning device for the inner wall burrs of a square pipe, which comprises a driving rod and an integral cutter head; the driving rod can do linear reciprocating motion along the axial direction, and the stroke length is not less than the length of the square pipe to be cleaned; the integral cutter head is fixedly installed at the end of the driving rod, and the outer contour thereof is adapted to the cross-sectional shape of the inner wall of the square pipe. The integral cutter head is provided with an avoiding opening and a cutting edge; the position of the avoiding opening corresponds to the position of the weld of the inner wall of the square pipe, and is used for accommodating the weld to pass through and scraping the position of the weld; the cutting edge is arranged at the circumferential edge and / or the bottom end edge of the integral cutter head. When the driving rod drives the cutter head to penetrate from one end to the other end of the square pipe, the avoiding opening scrapes the position of the weld, and the cutting edge scrapes the remaining parts, so that the one-time cleaning of the full-length burrs is realized. The present application has simple structure and extremely high cleaning efficiency, and can shorten the single cleaning time from 30 minutes of CNC machining to 2 seconds, thereby greatly improving the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and more specifically to a device for cleaning burrs on the inner wall of a square pipe. Background Technology

[0002] Square tubes are a common structural profile widely used in building structures, machinery manufacturing, transportation, and furniture manufacturing. Currently, the manufacturing process for square tubes typically involves bending a flat sheet into a U-shaped cross-section. Then, the open ends of the U-shaped components are closed and welded at the joint to form a complete square tube. This manufacturing process creates a single, continuous weld along the length of the tube at one of its edges.

[0003] The manufacturing process described above will produce the following two types of burr problems: 1. Stamping / Bending Burrs: During the process of bending flat material into a U-shaped component, bending burrs will be generated on the edge of the material. These burrs are located at the opening edge of the U-shaped component. After the U-shaped component is welded together, these burrs are distributed at the four corners of the inner wall of the square tube.

[0004] 2. Welding burrs: During the welding process of U-shaped components, weld beads and welding spatter will be generated at the weld seam. These welding burrs are located at a single weld seam on the inner wall of the square tube and are continuously distributed along the length of the pipe.

[0005] The presence of the two types of burrs mentioned above can lead to the following technical problems: reducing the effective flow cross-sectional area of ​​the square tube and increasing fluid transport resistance; stress concentration is easily generated at the burr tip, reducing the fatigue life of the pipe fitting; the rough surface of the burr makes it easy for corrosive media to accumulate, accelerating local corrosion; it affects the uniformity of subsequent coating or surface treatment; and for precision assembly applications, internal wall burrs may affect assembly accuracy. Therefore, it is essential to clean the internal wall burrs generated during the manufacturing process of square tubes.

[0006] For cleaning burrs on the inner wall of square pipes, existing technologies mainly employ the following methods: The first method is manual polishing. Operators use sandpaper, files, or electric polishing tools to manually polish the inside of the square pipe. The disadvantages of this method are: extremely low efficiency, with cleaning a single pipe typically taking more than 30 minutes; inconsistent cleaning quality, entirely dependent on the operator's experience and skill; high labor intensity and harsh operating environment; and difficulty in manually cleaning long or small-section pipes.

[0007] The second method is CNC machine tool processing. The square tube is clamped onto a CNC machine tool, and the inner wall is machined segment by segment using a milling cutter or grinding head. The disadvantages of this method are: high equipment investment, complex programming, and still low processing efficiency; the processing time for a single tube is typically around 30 minutes.

[0008] For cleaning burrs on the inner wall of square pipes, Chinese Patent No. CN210877885U discloses a burr removal device for the inner wall of a square steel pipe. The device includes a movable rod and four rotatable rear scrapers. By manually pushing the movable rod, the rear scrapers are made to adhere to the inner wall of the square pipe under the action of springs, thereby cleaning the burrs at the end of the square pipe.

[0009] However, this existing technology has the following drawbacks: First, it can only clean the port area and cannot clean the burrs on the inner wall of the entire pipe length. Bending burrs are distributed at the four corners of the entire pipe length, and welding burrs are distributed at the weld seam of the entire pipe length. Port cleaning cannot solve the problem of internal burrs. Second, the design did not specifically address the location of the weld. When the cutter head penetrates into the square tube, the protruding weld will interfere with the cutter head, causing it to jam or be damaged. Third, manual operation is inefficient and cannot meet the needs of automated production. Summary of the Invention

[0010] This invention provides a device for cleaning burrs on the inner wall of square pipes, in order to solve the technical problems of low efficiency and inability to achieve rapid cleaning of the entire pipe length in one go in existing cleaning methods.

[0011] To solve the above problems, the present invention provides a device for cleaning burrs on the inner wall of a square tube, which adopts the following technical solution: A device for cleaning burrs on the inner wall of a square pipe, comprising: The drive rod can reciprocate linearly along the axial direction, and its stroke length is not less than the length of the square tube to be cleaned. An integral cutter head is fixedly installed at the end of the drive rod, and the outer contour of the integral cutter head is adapted to the cross-sectional shape of the inner wall of the square tube to be cleaned; The integral cutter head is provided with a clearance opening and a cutting edge. The clearance opening is positioned corresponding to the weld position on the inner wall of the square tube. The clearance opening is used to accommodate the weld to pass through when the cutter head moves axially, and the edge of the clearance opening scrapes the weld position on the inner wall of the square tube when the weld passes through. The cutting edge is provided on the circumferential edge and / or bottom edge of the integral cutter head to scrape the remaining parts of the inner wall of the square tube when the drive rod drives the cutter head to move axially. When the drive rod drives the integral cutter head to move axially from one end of the square tube to the other end, the edge of the clearance opening scrapes the weld seam on the inner wall of the square tube, while the blade scrapes other parts of the inner wall of the square tube, so as to achieve one-time cleaning of burrs on the entire inner wall of the square tube.

[0012] The cutter head is an integral structure, and its outer contour matches the cross-sectional shape of the inner wall of the square tube to be cleaned. The circumferential cutting edge position of the cutter head is fixed. During axial movement, the cutter head can maintain scraping contact with the inner wall of the square tube around the entire circumference without any adjustment mechanism, achieving one-time full-circumference cleaning.

[0013] The integral cutter head is equipped with a clearance opening corresponding to the weld seam position, which has a dual function: Firstly, the clearance function. Because the weld seam of a square tube is raised, if the cutter head has a complete square cross-section, the raised weld seam will interfere with the cutter head during downward movement, causing the cutter head to jam or the weld seam to deform. The clearance opening allows the raised weld seam to pass through the cutter head, avoiding direct contact between the weld seam and the cutter head, and ensuring that the cutter head can move smoothly along the axial direction.

[0014] Secondly, the scraping function. The edge of the clearance opening forms a sharp scraping blade. When the cutter head descends and the weld passes through the clearance opening, the edge of the clearance opening contacts the weld surface, scraping the weld area and removing welding burrs and weld beads. This design cleverly integrates the two functions of "clearance" and "cleaning" into the same structure, completing the cleaning of the weld while avoiding interference.

[0015] The drive rod can perform linear reciprocating motion along the axial direction with a stroke length not less than the length of the square tube to be cleaned, ensuring that the cutter head can penetrate the entire square tube body to complete the full-section cleaning; the integral cutter head is fixedly installed at the end of the drive rod and its outer contour is adapted to the cross-sectional shape of the inner wall of the square tube to be cleaned, achieving precise contact between the cutter head and the tube wall; on this basis, the position of the clearance opening set on the integral cutter head corresponds to the position of the weld seam on the inner wall of the square tube, so that the clearance opening can accommodate the weld seam to pass through when the cutter head moves axially, and at the same time, the edge of the clearance opening scrapes the weld seam position on the inner wall of the square tube when the weld seam passes through. The cutting edge is located on the circumferential edge and / or bottom edge of the integral cutting head. When the drive rod moves the cutting head axially, it scrapes the remaining parts of the inner wall of the square tube. Finally, when the drive rod moves the integral cutting head axially from one end of the square tube to the other end, the edge of the clearance scrapes the weld seam of the inner wall of the square tube, while the cutting edge scrapes other parts of the inner wall of the square tube. This achieves one-time cleaning of burrs on the entire inner wall of the square tube, thereby greatly improving cleaning efficiency and reducing the processing time of a single piece from half an hour on a traditional CNC machine tool to about 2 seconds, effectively meeting the needs of high-efficiency production.

[0016] In a preferred embodiment of the present invention, the width of the clearance opening is greater than the width of the square tube weld seam to ensure that the weld seam can pass through smoothly. Because the clearance opening is wider than the square tube weld seam, even if there are deviations in the weld seam width or minor errors in the installation of the cutting tool, the weld seam can still pass through smoothly, avoiding jamming. This design reduces the precision requirements for the alignment of the cutting tool and the pipe fitting, making equipment debugging simpler and maintenance more convenient. It also adapts to fluctuations in weld seam width during the welding process, improving the equipment's fault tolerance and adaptability.

[0017] In a preferred embodiment of the present invention, the clearance opening is a U-shaped cutting edge. The U-shaped cutting edge matches the shape of the square pipe weld, ensuring smooth passage of the weld while maintaining good contact between the edge of the clearance opening and the weld surface, thus improving the scraping effect. Simultaneously, the U-shaped structure makes the two sides of the clearance opening symmetrical, resulting in uniform force distribution during weld passage, stable scraping, and preventing uneven loading that could cause blade vibration or uneven weld scraping.

[0018] The U-shaped cutting edge is positioned precisely against the weld seam. As the cutting head descends, the raised weld seam passes through the U-shaped opening without hitting the cutting head, allowing it to descend smoothly. This solves the problem of the cutting head being "stuck by the weld seam." The edge of the U-shaped cutting edge is sharp. As the cutting head descends, the edge of the U-shaped opening scrapes against the weld seam surface, removing burrs and weld beads.

[0019] As a preferred embodiment of the present invention, the cutting edge includes a bottom cutting edge disposed circumferentially at the bottom end of the cutting head, and / or a side cutting edge disposed on the outer circumferential wall of the cutting head.

[0020] As a preferred embodiment of the present invention, the cutting edge is radially inward and axially downward, and the angle between its cutting edge and the horizontal plane is 5°-30°.

[0021] As a preferred embodiment of the present invention, it further includes a pipe fixing mechanism, which clamps and positions the square pipe so that its axis is collinear with the axis of the drive rod.

[0022] Align the axis of the square tube with the axis of the drive rod to ensure that the cutter head does not deviate when entering the pipe (i.e., the square tube to be cleaned), thus avoiding scratching the pipe wall or damaging the cutter head. Good alignment ensures uniform contact between the blade and all parts of the inner wall of the pipe, resulting in consistent scraping depth and stable cleaning quality. The pipe fixing mechanism firmly secures the pipe during scraping, preventing it from shifting or rotating due to scraping force, ensuring safety.

[0023] As a preferred embodiment of the present invention, the pipe fixing mechanism includes a base, a fixing member, and a baffle. The fixing member is located above the base, and the fixing member and the base form a cavity with a side opening. The cavity is used to accommodate a square pipe, and the baffle is located at the opening of the cavity to fix the square pipe. The base has a through hole to allow burrs and debris generated during scraping to be discharged.

[0024] The fixing component and the base form a cavity with a side opening, allowing square tubes to be inserted into the cavity from the side without axial insertion. This simplifies clamping and operation, making it particularly suitable for assembly line operations and significantly improving production efficiency. The cavity restricts the radial displacement of the square tube, preventing it from wobbling during scraping. A baffle at the cavity opening prevents the square tube from detaching and fixes it in a predetermined axial position, ensuring the drive rod accurately guides the cutter head into the tube. This double fixing ensures the tube remains stationary during scraping, guaranteeing cleaning accuracy and safety. A through-hole on the base allows burrs and debris generated during scraping to drain promptly, preventing debris accumulation in the cavity and avoiding interference with subsequent tube clamping or scratching of the tube surface.

[0025] In a preferred embodiment of the present invention, the cutter head and the drive rod are detachably connected. This connection includes one of the following: threaded connection, flange connection, pin connection, or quick-connect coupling. The detachable connection allows operators to quickly change the cutter head to the appropriate size for different specifications of square tubes, improving the versatility and adaptability of the equipment. By changing the cutter head to different sizes, this cleaning device can adapt to square tubes of various side lengths and wall thicknesses without requiring modifications to the entire machine.

[0026] As a preferred embodiment of the present invention, a chip removal mechanism is further included. This chip removal mechanism is disposed on a drive rod above the cutter head or at the outlet end of the pipe fitting, and is used to discharge burrs and debris generated during scraping outside the pipe. The chip removal mechanism includes at least one of an air nozzle, a dust suction interface, or a brush assembly. The chip removal mechanism, disposed on the drive rod above the cutter head or at the outlet end of the pipe fitting, does not interfere with the operation of the cutter head and effectively collects debris, resulting in a compact structure.

[0027] As a preferred embodiment of the present invention, it further includes a drive mechanism, which is one of a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, or a linear motor. This drive mechanism is used to drive the drive rod to perform linear reciprocating motion, thereby achieving automated operation.

[0028] Besides square tubes, this invention can also be extended to tubes with other cross-sectional shapes, such as rectangular tubes, hexagonal tubes, and elliptical tubes, simply by setting the shape of the cutting head accordingly. This gives the invention excellent technical extensibility.

[0029] The beneficial effects are: 1. This invention employs an axial linear scraping method, allowing the cutter head to complete the full circumference cleaning of the inner wall of a square tube in a single pass, taking only 2-5 seconds. In contrast, existing manual grinding or CNC machining methods require more than 30 minutes, resulting in a significant improvement in efficiency. This efficiency improvement can substantially shorten the production cycle and increase capacity for mass-produced square tube fittings.

[0030] 2. This invention addresses two types of burrs generated during the manufacturing process of square tubes—welding burrs (located at the weld seam) and bending burrs (located on the plane and corners)—by employing different cleaning structures: an clearance opening is specifically designed to clean welding burrs at the weld seam, while a cutting edge is specifically designed to clean bending burrs on the plane and corners. This design ensures that each type of burr is treated specifically, resulting in thorough cleaning without any blind spots. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the square tube to be cleaned. Figure 2 This is a schematic diagram of the structure of a cleaning device for the inner wall of a square tube according to the present invention; Figure 3 for Figure 2 A magnified view of part A in the image; Figure 4 This is a schematic diagram of the integral cutter head structure; Figure 5 A schematic diagram of the pipe fixing mechanism and drive rod after cleaning the square pipe; Figure 6 for Figure 5 A cross-sectional view along the AA direction.

[0032] Explanation of reference numerals in the attached figures: 1. Square tube; 11. Weld seam; 2. Frame; 3. Drive rod; 4. Integral cutter head; 41. U-shaped cutting edge; 42. Cutting edge; 5. Pipe fitting fixing mechanism; 51. Base; 52. Fixing component; 53. Baffle; 54. Through hole; 6. Drive mechanism. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0035] The principles and essence of the present invention will be explained in detail below with reference to several representative embodiments.

[0036] Example 1: In actual production, square tubes are typically formed by interlocking U-shaped stamped parts and welding them at the joint, resulting in a weld seam along the length of the tube. The stamping process also creates burrs on the tube wall. Currently, the removal of burrs and weld protrusions from the inner wall of square tubes is usually done using CNC machine tools. This involves programming and controlling the tool's movement along the inner wall trajectory to achieve scraping. This process requires precise tool path planning and multi-axis linkage control to complete the finishing work on the inner wall surface. However, this process is time-consuming, with a single piece taking up to 30 minutes to process, making it unsuitable for large-scale production.

[0037] To solve the above problems, such as Figure 1-6 As shown, the present invention provides a cleaning device for burrs on the inner wall of a square tube, including a frame 2, a drive mechanism 6, a drive rod 3, an integral cutter head 4, and a tube fixing mechanism 5.

[0038] like Figure 1 As shown, the square tube 1 to be cleaned is formed by bending a U-shaped component and then welding it together. Its inner wall includes four flat parts and four corner parts. A single continuous weld 11 is formed along the length of the tube. Weld burrs and weld beads are present at the weld 11 position, and bending burrs are present at the four corner positions.

[0039] like Figure 2 As shown, frame 2 is welded from structural steel and is used to install and support other components.

[0040] In this embodiment, the drive mechanism 6 is a cylinder, which is fixedly mounted on the top of the frame 2. The cylinder is equipped with a speed control valve and a limit switch to control the moving speed and stroke length of the drive rod 3. The drive mechanism 6 provides linear reciprocating power. In other embodiments, the drive mechanism 6 may also be a hydraulic cylinder, an electric cylinder, or a linear motor.

[0041] The drive rod 3 is connected to the piston rod of the cylinder and can perform linear reciprocating motion along the axial direction. The drive rod 3 is made of stainless steel with a chrome-plated surface to improve wear resistance and corrosion resistance. The stroke length of the drive rod 3 is not less than the length of the square tube 1 to be cleaned, ensuring that it can pass through from one end to the other.

[0042] like Figure 3As shown, the integral cutter head 4 is fixedly installed at the end of the drive rod 3, using a detachable connection method (threaded connection). The integral cutter head 4 adopts an integral structure and is made of cemented carbide, featuring high hardness and high wear resistance. The outer contour of the integral cutter head 4 is adapted to the cross-sectional shape of the inner wall of the square tube 1 to be cleaned, and its cross-sectional dimension is slightly smaller than the inner wall dimension of the square tube, ensuring that the cutting edge can effectively contact the burrs while avoiding jamming between the cutter head and the tube wall.

[0043] like Figure 4 As shown, the integral cutter head 4 is provided with a clearance opening and a cutting edge 42. In this embodiment, the clearance opening is a U-shaped cutting edge 41. Of course, in other embodiments, the clearance opening can also be a C-shaped cutting edge, a V-shaped cutting edge, or a semi-circular groove structure. The depth of the clearance opening is greater than the weld reinforcement height of the square tube. For example, when the weld reinforcement height is 0.3 mm to 0.8 mm, the clearance opening depth is 1.0 mm to 1.5 mm; the width of the clearance opening is greater than the width of the square tube weld body. For example, when the weld width is 1.2 mm, the clearance opening width is 1.8 mm to 2.5 mm, to ensure that the weld body is completely embedded in the clearance opening without being squeezed; the edge of the clearance opening is the scraping edge, which shares the same cutting edge processing process as the cutting edge 42; the position of the clearance opening on the integral cutter head is determined according to the orientation of the typical weld 11 of the square tube.

[0044] The position of the U-shaped cutting edge 41 corresponds to the position of the weld 11 on the inner wall of the square tube 1. The width of the U-shaped cutting edge 41 is greater than the width of the weld 11 of the square tube to ensure that the weld 11 can pass through smoothly. The edge of the U-shaped cutting edge 41 forms a sharp scraping blade, which is used to scrape the weld 11 position when the cutting head moves downward, and to clean the welding burrs and weld beads generated at the weld 11 position.

[0045] The cutting edge 42 is located at the bottom edge of the integral cutter head 4 (i.e., the bottom cutting edge), or on the circumferential outer wall of the integral cutter head (i.e., the side wall cutting edge), or both.

[0046] like Figure 4 As shown, the cutting edge 42 is the bottom cutting edge, which is arranged in a continuous ring. The cutting edge is radially inward and axially downward, with an angle of 15° between its cutting edge and the horizontal plane. This angle ensures that the cutting edge maintains sufficient sharpness and strength, while also naturally forming a clearance angle on the back of the cutting edge to avoid friction with the machined surface.

[0047] In other embodiments, the bottom cutting edge is provided with a segmented cutting band, and its cutting edge inclination angle is 5° to 30°, for example 15°. This inclination angle causes the cutting edge to generate an inward tangential force during axial penetration, thereby enhancing the ability to remove burrs.

[0048] In other embodiments, the sidewall cutting edge can refer to the scraping cutting edge that is set on the outer wall surface of the integral cutter head and extends along the height direction. Its function is to simultaneously scrape the burrs and surface hairs on the inner surface of the four sidewalls of the square tube 1 during the axial advance of the cutter head. The sidewall cutting edge can be arranged in a vertical strip, spiral, or segmented manner. For example, a vertical cutting strip can be set along the outer edge of each of the four sidewalls of the cutter head, or the sidewall cutting edge can be set only on the sidewall where the corresponding weld 11 is located and the two adjacent walls to match the actual burr distribution characteristics of the square tube 1. The cutting height of the sidewall cutting edge can be set according to the inner cavity height of the square tube 1. For example, it can cover the entire length of the cutter head, or it can only cover the middle 50%–80% height range.

[0049] The blade 42 is made of the same material as the integral blade head 4 base, and the cutting edge area is additionally nitrided or coated with TiN to improve wear resistance and life.

[0050] The pipe fixing mechanism 5 is mounted on the frame 2 and is used to clamp and position the square pipe 1 during the cleaning process so that its axis is collinear with the axis of the drive rod 3.

[0051] like Figure 5 and 6 As shown, the pipe fixing mechanism 5 includes a base 51, a fixing member 52, and a baffle 53. The fixing member 52 is disposed above the base 51, forming a cavity with a side opening to accommodate the square pipe 1. The baffle 53 is disposed at the cavity opening to prevent the square pipe 1 from coming out of the opening and to fix it in a predetermined axial position so that the drive rod 3 can drive the cutter head 4 to accurately enter the interior of the square pipe 1. The base 51 has a through hole 54 to allow burrs and debris generated during scraping to be discharged.

[0052] In other embodiments, the pipe fixing mechanism 5 can be one of a pneumatic clamp, a hydraulic clamp, a mechanical manual clamping plate, or a servo electric clamp, used to apply a stable clamping force to the square pipe 1 placed on the frame 2 before the cleaning operation, so that it does not displace, rotate, or tilt during the axial movement of the integral cutter head 4 driven by the drive rod 3; the pipe fixing mechanism 5 is installed on the support platform of the frame 1, its clamping surface is parallel to the movement direction of the drive rod 3, and the clamping center line is strictly coincident with the axis of the drive rod 3.

[0053] The working process of this embodiment is as follows: The first step is to insert the square tube 1 to be cleaned into the cavity of the pipe fixing mechanism 5 from the side, push the baffle 53 to ensure that the square tube 1 is fixed in the cavity of the fixing mechanism 5, and complete the positioning of the square tube 1.

[0054] In the second step, the drive mechanism 6 drives the drive rod 3 to drive the integral cutter head 4 to be axially inserted from one end of the square tube 1.

[0055] During insertion, the weld 11 protruding from the inner wall of the square tube 1 passes through the U-shaped cutting edge 41 on the integral cutting head 4, avoiding interference between the weld 11 and the cutting head 4; at the same time, the edge of the U-shaped cutting edge 41 scrapes the weld 11 to remove welding burrs and weld beads; the cutting edge 42 set at the bottom edge of the cutting head 4 scrapes the four flat parts and four corners of the inner wall of the square tube 1 to remove bending burrs.

[0056] In the third step, after the drive rod 3 drives the integral cutter head 4 through the entire square tube 1 to the other end, the drive mechanism 6 drives in the opposite direction, and the drive rod 3 drives the cutter head 4 to quickly return to its original position.

[0057] Fourth, the burrs and debris generated by scraping are discharged from the through hole 54 on the base 51. Some debris may remain in the tube and can be further cleaned by the chip removal mechanism (not installed in this embodiment).

[0058] Fifth step: Remove the cleaned square tube 1 and wait for the next work cycle.

[0059] The entire process takes about 2 seconds. Tests have shown that this embodiment can effectively clean the weld seams and burrs on the inner wall of the square tube. The surface roughness Ra of the cleaned inner wall can reach below 3.2μm, and the burr residual height is less than 0.1mm, which fully meets the requirements for subsequent processing and use.

[0060] Example 2: This embodiment is basically the same as embodiment 1, except that a chip removal mechanism is added.

[0061] The chip removal mechanism is located on the drive rod 3 above the cutter head and includes an air nozzle and a dust suction interface. The air nozzle is connected to an air source to blow high-pressure gas into the tube; the dust suction interface is connected to a negative pressure dust collection device.

[0062] During and after the scraping process of the cutter head 4, the chip removal mechanism is activated. The air nozzle blows high-pressure gas into the tube, blowing the chips trapped inside towards the outlet. At the same time, the dust suction interface sucks the chips into the dust collection bag. The simultaneous operation of air blowing and dust suction creates airflow circulation, improving the chip removal efficiency.

[0063] Tests have shown that adding a chip removal mechanism reduces the amount of residual chips inside the pipe by more than 90%, effectively preventing chips from scratching the cleaned surface and improving the cleaning quality.

[0064] Example 3: This embodiment is basically the same as embodiment 1, except that the drive mechanism 6 uses an electric cylinder and a control system is added.

[0065] The control system includes a PLC controller, a human-machine interface (HMI), and sensors. The sensors include position, speed, and pressure sensors, used to monitor the position, speed, and scraping force of the drive rod 3 in real time. The PLC controller automatically adjusts the electric cylinder's operating status according to preset parameters, achieving closed-loop control. The HMI uses a touchscreen to display the equipment's operating status and alarm information, and allows operators to set and modify parameters.

[0066] With the addition of a control system, the automation and intelligence levels of the equipment are significantly improved, enabling unattended operation, further increasing production efficiency and reducing labor costs.

[0067] During the operation of the cleaning device, when the drive rod 3 drives the integral cutter head 4 through the entire square tube 1 to the other end, the position sensor detects the positioning signal, and the control system drive mechanism 6 reverses the drive, causing the drive rod 3 to drive the cutter head 4 to quickly return to its original position.

Claims

1. A device for cleaning burrs on the inner wall of a square tube, characterized in that, include: The drive rod can reciprocate linearly along the axial direction, and its stroke length is not less than the length of the square tube to be cleaned. An integral cutter head is fixedly installed at the end of the drive rod, and the outer contour of the integral cutter head is adapted to the cross-sectional shape of the inner wall of the square tube to be cleaned; The integral cutter head is provided with a clearance opening and a cutting edge. The clearance opening is positioned corresponding to the weld position on the inner wall of the square tube. The clearance opening is used to accommodate the weld to pass through when the cutter head moves axially, and the edge of the clearance opening scrapes the weld position on the inner wall of the square tube when the weld passes through. The cutting edge is located on the circumferential edge and / or bottom edge of the integral cutter head. When the drive rod drives the integral cutter head to move axially from one end of the square tube to the other end, the edge of the clearance opening scrapes the weld seam on the inner wall of the square tube, while the blade scrapes other parts of the inner wall of the square tube, so as to achieve one-time cleaning of burrs on the entire inner wall of the square tube.

2. The cleaning device for the inner wall burrs of a square tube according to claim 1, characterized in that, The width of the clearance opening is greater than the width of the square tube weld to ensure that the weld can pass through smoothly.

3. The cleaning device for the inner wall burrs of a square tube according to claim 1 or 2, characterized in that, The clearance is a U-shaped blade.

4. The device for cleaning burrs on the inner wall of a square tube according to claim 3, characterized in that, The cutting edge includes a bottom cutting edge disposed circumferentially at the bottom end of the cutting head, and / or a side cutting edge disposed on the outer circumferential wall of the cutting head.

5. The cleaning device for the inner wall burrs of a square tube according to claim 1 or 4, characterized in that, The cutting edge is radially inward and axially downward, with an angle of 5°-30° between its cutting edge and the horizontal plane.

6. The cleaning device for the inner wall burrs of a square tube according to claim 1, characterized in that, It also includes a pipe fixing mechanism, which clamps and positions the square pipe so that its axis is collinear with the axis of the drive rod.

7. The device for cleaning burrs on the inner wall of a square tube according to claim 6, characterized in that, The pipe fixing mechanism includes a base, a fixing member, and a baffle. The fixing member is located above the base, and the fixing member and the base form a cavity with a side opening. The cavity is used to accommodate a square pipe. The baffle is located at the opening of the cavity to fix the square pipe. The base has a through hole to allow burrs and debris generated during scraping to be discharged.

8. The device for cleaning burrs on the inner wall of a square tube according to claim 1, characterized in that, The cutter head and the drive rod are detachably connected.

9. The device for cleaning burrs on the inner wall of a square tube according to claim 1, characterized in that, It also includes a chip removal mechanism, which is located on the drive rod above the cutter head or at the outlet end of the pipe, for discharging burrs and chips generated during scraping outside the pipe; the chip removal mechanism includes at least one of an air nozzle, a dust suction interface or a brush assembly.

10. The device for cleaning burrs on the inner wall of a square tube according to claim 1, characterized in that, It also includes a drive mechanism, which is one of a cylinder, a hydraulic cylinder, an electric cylinder, or a linear motor.

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