A deburring device for high-frequency straight-seam welded pipe production

Abstract

The application relates to the technical field of machine tool equipment, and discloses a deburring equipment for high-frequency straight seam welded pipe production, which comprises a machine table and a supporting beam, a plurality of conveying rollers are arranged on the machine table, the supporting beam is fixedly connected with the machine table through a support, the supporting beam is connected with a floating frame with a symmetrical structure through a lifting frame, the symmetrical surface is vertical and passes through the axis of a steel pipe, the floating frame can vertically float, floating springs are arranged between the floating frame and the lifting frame, and rollers are arranged at the bottom of the floating frame. The deburring equipment for high-frequency straight seam welded pipe production is self-adaptive and follows the floating mechanism, and predictive tool withdrawal is added, so that the scraping process is stably ensured, and stable, self-adaptive scraping and process protection of the weld burr in high-frequency welded pipe production are realized.

Description

Technical Field

[0001] This application relates to the field of machine tool equipment technology, and in particular to a deburring device for the production of high-frequency straight seam welded pipes. Background Technology

[0002] The basic principle of high-frequency straight seam welded pipe is to use the skin effect and proximity effect of high-frequency current to rapidly heat the edge of the steel strip to a molten or plastic state, and then achieve solid-phase or molten welding between metals under the action of extrusion rollers to form a straight seam welded pipe.

[0003] Deburring is a crucial post-processing step in the production of high-frequency straight seam welded pipes. The deburring operation is performed immediately after welding (while the weld temperature is still high and the metal has good plasticity), specifically after the extrusion rollers and before sizing. Currently, most commonly used scraper structures are fixed-height or manually adjustable. The relative position of the scraper blade to the steel pipe surface remains essentially constant after being set. However, because the steel pipe has not yet undergone sizing, there may be ellipticity deviations (i.e., insufficient roundness) or localized wall thickness deviations. This can cause fluctuations in the outer diameter of the steel pipe or the weld height, resulting in changes in the relative height between the scraper and the weld. Specifically: In areas where the steel pipe diameter is small or the weld seam is low, the scraper's cutting depth is insufficient, making it unable to effectively remove burrs and resulting in "incomplete scraping". In areas where the steel pipe diameter is too large or the weld seam is too high, if the scraper cuts too deep, it may not only over-cut the weld metal, but may even scratch the base material, forming scratches or grooves, affecting the strength and surface integrity of the pipe. The contact pressure between the scraper and the steel pipe surface is difficult to keep constant, resulting in uneven wear of the tool, shortened lifespan, and increased equipment maintenance frequency and production costs.

[0004] The aforementioned problems not only affect the stability of product quality, but may also lead to the generation of batches of defective products, reduce production efficiency, and restrict the manufacturing level of high-end welded pipe products. Summary of the Invention

[0005] This application proposes a deburring device for high-frequency straight seam welded pipe production. It uses a floating mechanism for adaptive following and predictive tool retraction to ensure the stability of the scraping process, thereby achieving stable, adaptive scraping and process protection of weld burrs in high-frequency welded pipe production.

[0006] To achieve the above objectives, this application adopts the following technical solution: a deburring device for high-frequency straight seam welded pipe production, comprising a machine base and a support beam. The machine base is provided with several conveying rollers. The support beam is fixedly connected to the machine base via a bracket. The support beam is connected to a floating frame with a symmetrical structure via a lifting frame. The symmetrical plane is vertical and passes through the axis of the steel pipe. The floating frame can float vertically and is provided with a floating spring between it and the lifting frame. Rollers are provided at the bottom of the floating frame. The floating frame is connected to an adjusting component. The adjusting component has an inclined guide structure. The adjusting component is set along the axis. The adjusting component is connected to an adjusting block via the guide structure. When the adjusting block slides, it can move up and down. A scraper is detachably connected to the lower end of the adjusting block.

[0007] Furthermore, the floating frame includes multiple centrally located portal frames, with floating rods symmetrically arranged on both sides of the portal frames. The floating rods pass through the portal frames and have limiting structures at their ends. Floating springs are located between the portal frames and the lifting frame, allowing the portal frames to float freely while ensuring the stability of the scraper.

[0008] Furthermore, the adjusting component is equipped with a lead screw, which carries a servo motor. The adjusting block is threadedly connected to the lead screw to achieve automatic adjustment of the scraper position.

[0009] Furthermore, a displacement sensor is installed on the gantry frame on the side opposite to the steel pipe conveying direction. The displacement sensor can monitor the displacement change of the gantry frame relative to the lifting frame. When the change of the gantry frame on the side opposite to the steel pipe conveying direction exceeds the threshold, the lead screw rotates, the height of the lead screw is increased, and the blade is retracted to avoid scratching the substrate or damaging the scraper due to excessive pressure.

[0010] Furthermore, the guide structure on the adjusting component is inclined upwards along the conveying direction of the steel pipe, improving the timeliness and reliability of the tool retraction.

[0011] Furthermore, the lifting frame includes a connecting frame and a telescopic cylinder. The bottom of the connecting frame is fixedly connected to the floating rod, and a connecting groove is provided at the bottom of the connecting frame. The telescopic cylinder is fixedly connected to the support beam and is connected to the connecting groove by bolts. Gaskets are provided between the two end faces of the telescopic cylinder and the connecting groove. The longitudinal position of the lifting frame and the floating frame is adjusted by adjusting the thickness of the gaskets on both sides to ensure that the lifting frame and the floating frame are centered.

[0012] Furthermore, the adjusting component includes a guide groove, which is a guiding structure with sliding grooves on both sides. The adjusting block clamps the sliding grooves on both sides by a slider. The guide groove is provided with a limiting rod at each crossbeam of the portal frame. The limiting rod passes through the crossbeam. An elastic sleeve is provided between the guide groove and the crossbeam. The elastic sleeve is elastic.

[0013] Furthermore, the guide groove is capable of floating, with a maximum floating amount of 0.05mm. This suppresses vibration while also dissipating force, preventing the scraper from bearing excessive impact.

[0014] The beneficial effects of this invention are as follows: This application provides a deburring device for high-frequency straight seam welded pipe production. The device uses a floating frame to fix the scraper, which floats with changes in the outer diameter of the steel pipe, automatically adjusting the distance between the scraper and the weld. On one hand, this distributes pressure across multiple portal frames, resulting in smaller forces on individual frames, allowing for smooth floating, while the total pressure is sufficiently large to ensure stable scraper operation. On the other hand, when the initial chord length to diameter ratio is small, the change in bow height with diameter changes (including local changes caused by ellipticity and thickness variations) is much smaller than the change in diameter, resulting in smaller changes in the distance between the scraper and the weld. This makes the scraping depth relatively stable and the scraper force relatively balanced, thus protecting the substrate and reducing scraper damage.

[0015] The changes in outer diameter and weld are predicted in advance by the floating of the end frame. When the change exceeds the safety value, the tool is automatically retracted. During the retraction, no force is applied between the tool and the steel pipe, further protecting the steel pipe and the base material.

[0016] By adjusting the horizontal movement of the adjusting block to a vertical movement, the adjustment amount is amplified, improving the adjustment accuracy. On the other hand, the horizontal guide groove absorbs a large amount of vertical impact force, preventing the lead screw from being impacted. This isolates the accuracy adjustment and pressure absorption, ensuring the scraping accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a front view of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of B in the middle; Figure 5 For the present invention Figure 3 Enlarged view of A in the middle; Figure 6 This is a diagram showing the positional relationship between the scraper and the steel pipe in this invention.

[0018] In the diagram: 1. Machine base; 2. Conveyor roller; 3. Support beam; 4. Lifting frame; 401. Connecting frame; 402. Connecting groove; 403. Gasket; 404. Telescopic cylinder; 5. Floating frame; 501. Gantry frame; 502. Floating rod; 503. Floating spring; 6. Adjusting component; 601. Guide groove; 602. Limiting rod; 603. Elastic sleeve; 7. Lead screw; 8. Adjusting block; 9. Scraper; 10. Displacement sensor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-6 A deburring device for high-frequency straight seam welded pipe production includes a machine base 1 and a support beam 3. The machine base 1 is equipped with several conveying rollers 2, on which the steel pipe moves. The support beam 3 is fixedly connected to the machine base 1 via a bracket. In this embodiment, it is used to remove external burrs from the steel pipe. The bracket is H-shaped, with the support beam 3 positioned at the top center of the bracket. In other embodiments, if used to scrape burrs from the inner wall of the steel pipe, the bracket connected to the support beam 3 is L-shaped and located at the opening of the steel pipe. Figure 3 On the left side, Figure 1 (Facing the side of the paper), and extending into the steel pipe, past the welding position, the support beam 3 is connected to the floating frame 5 via the lifting frame 4. The floating frame 5 includes multiple sets of portal frames 501, with the portal frame 501 centrally located (relative to the steel pipe and the extrusion roller). Floating rods 502 are symmetrically arranged on both sides of the portal frame 501. The floating rods 502 pass through the portal frame 501 and are fixedly connected to the lifting frame 4. The floating rods 502 are movably connected to the portal frame 501. A floating spring 503 is provided between the portal frame 501 and the lifting frame 4. A limiting block is provided at the end of the floating rod 502 to keep the floating spring 503 in a compressed state. A roller is provided at the bottom of the portal frame 501. The wheels, rollers, and steel pipes slide relative to each other and float as the outer diameter of the steel pipes changes, causing the gantry frame 501 to float against the elastic force of the floating spring 503. The gantry frame 501 is fixedly connected to the adjusting component 6. The adjusting component 6 has an inclined guide structure and is set along the axis. The adjusting component 6 is connected to the adjusting block 8 through the guide structure. The adjusting block 8 can move up and down when it slides. The adjusting component 6 is equipped with a lead screw 7, which has a servo motor. The adjusting block 8 is threadedly connected to the lead screw 7. The lead screw 7 drives the adjusting block 8 to move along the guide structure, thereby adjusting the height of the adjusting block 8. The lower end of the adjusting block 8 is detachably connected to a scraper 9.

[0021] The elastic force of a single floating spring 503 is relatively small. The gantry frame 501 can stably overcome the elastic force of the floating spring 503 and achieve floating. Multiple gantry frames 501 are connected into a whole by the adjusting member 6, which together apply pressure to the adjusting block 8 and the scraper 9. This pressure is large enough to give the scraper 9 a sufficiently large scraping pressure.

[0022] Please see Figure 1 and Figure 6 The width of a single portal frame 501 is fixed, meaning the distance L between the two lower rollers remains constant. During operation, the portal frame 501 floats up and down as the diameter of the steel pipe changes. The height H of the scraper 9 from the lowest point of the rollers remains relatively stable. When the radius of the steel pipe is R, the bow height... The change in h is much smaller than the change in radius R. The change in weld height relative to the scraper spacing (the value of scraping height Hh) is also much smaller than the direct change in weld height caused by the change in radius and roundness. This prevents the scraping amount and height from changing too much. For example, if the length L is less than one-quarter of the diameter of the steel pipe, when the diameter increases by 0.25 times, the arc height decreases by 0.019 times, and the change is much smaller than the direct change caused by the diameter.

[0023] The height (H) of the scraper 9 is adjusted by moving the adjusting block 8 via a lead screw. This adjustment offers relatively high precision and is more convenient than manual adjustment. Please refer to [link / reference]. Figure 2 and Figure 5 A displacement sensor 10 is installed on the gantry frame 501 on the side opposite to the steel pipe conveying direction. The displacement sensor 10 can monitor the displacement change of the gantry frame 501 relative to the lifting frame 4. As the steel pipe moves, the left gantry frame 501 contacts the steel pipe first. When the displacement change detected by the displacement sensor 10 is small, the lead screw 7 does not make any adjustment, or makes a small adjustment to adjust the height of the scraper 9, thereby ensuring that the scraping depth does not change significantly. When the change of the left gantry frame 501 exceeds the threshold, the lead screw 7 rotates, the height of the lead screw 7 is increased, and the scraper is retracted to avoid scratching the substrate or damaging the scraper 9 due to excessive pressure.

[0024] The guide structure on the adjusting component 6 is inclined upwards along the conveying direction of the steel pipe. During retraction, the scraper 9 remains relatively stationary or actively retracts relative to the steel pipe in the axial direction, which can promptly release force and improve the timeliness and reliability of retraction. After retraction, the displacement sensor 10 detects that the displacement of the gantry frame 501 has returned to a safe range, and then the feed resumes. Any untreated areas during retraction are marked for later grinding.

[0025] Please see Figure 2 and Figure 4The lifting frame 4 includes a connecting frame 401 and a telescopic cylinder 404. The bottom of the connecting frame 401 is fixedly connected to the floating rod 502. The bottom of the connecting frame 401 is provided with a connecting groove 402. The telescopic cylinder 404 is fixedly connected to the support beam 3. The telescopic cylinder 404 is connected to the connecting groove 402 by bolts. Gaskets 403 are provided between the two end faces of the telescopic cylinder 404 and the connecting groove 402. The longitudinal position of the lifting frame 4 and the floating frame 5 is adjusted by adjusting the thickness of the gaskets 403 on both sides to ensure that the lifting frame 4 and the floating frame 5 are centered.

[0026] Please see Figure 4 The adjusting component 6 includes a guide groove 601, which is a guiding structure. Both sides of the guide groove 601 have sliding grooves. The adjusting block 8 clamps the sliding grooves on both sides by a slider, and the slider slides in the sliding grooves. The guide groove 601 is provided with a limiting rod 602 at the crossbeam of each portal frame 501. The limiting rod 602 passes through the crossbeam and has a limiting structure at the top to prevent it from coming out. An elastic sleeve 603 is provided between the guide groove 601 and the crossbeam. The elastic sleeve 603 is elastic, allowing the guide groove 601 to float slightly, with a maximum float of 0.05mm. This suppresses jumping and releases force, preventing the scraper 9 from bearing excessive impact. At the same time, when one side of the portal frame 501 becomes higher, the floating of the limiting rod 602 can absorb the change and reduce the impact on the guide groove 601.

[0027] Before operation, the corresponding bow height is calculated based on the diameter of the steel pipe to be produced, and the height of the scraper 9 is calculated based on the remaining height after scraping. The position of the adjusting block 8 relative to the adjusting part 6 is adjusted according to the height. When welding the steel pipe, after the steel pipe is welded and initially formed, it immediately enters the working range of this deburring equipment. The floating frame 5 presses the steel pipe under the control of the support beam 3. At the same time, the elastic force of the elastic sleeve 603 provides the scraper 9 with an appropriate amount of cutting pressure. When the steel pipe moves at high speed, as the outer diameter of the steel pipe changes, the floating frame 5 carries the scraper 9 to float. This process reduces the positional change between the weld and the scraper 9, so that the cutting depth does not change drastically.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A deburring device for high-frequency straight seam welded pipe production, comprising a machine base (1) and a support beam (3), wherein the machine base (1) is provided with a plurality of conveying rollers (2), and the support beam (3) is fixedly connected to the machine base (1) via a bracket, characterized in that: The support beam (3) is connected to a floating frame (5) with a symmetrical structure via a lifting frame (4). The symmetrical plane is vertical and passes through the axis of the steel pipe. The floating frame (5) can float vertically and is provided with a floating spring (503) between it and the lifting frame (4). The bottom of the floating frame (5) is provided with rollers. The floating frame (5) is connected to an adjusting component (6). The adjusting component (6) has an inclined guide structure. The adjusting component (6) is set along the axis of the steel pipe. The adjusting component (6) is connected to an adjusting block (8) via the guide structure. When the adjusting block (8) slides, it can move up and down. The lower end of the adjusting block (8) is detachably connected to a scraper (9).

2. The deburring equipment for high-frequency straight seam welded pipe production according to claim 1, characterized in that, The floating frame (5) includes multiple centrally located portal frames (501). Floating rods (502) are symmetrically arranged on both sides of the portal frame (501). The floating rods (502) pass through the portal frame (501) and are provided with a limiting structure at the end. Floating springs (503) are located between the portal frame (501) and the lifting frame (4).

3. The deburring equipment for high-frequency straight seam welded pipe production according to claim 1, characterized in that, The adjusting component (6) is provided with a lead screw (7), which is equipped with a servo motor, and the adjusting block (8) is threadedly connected to the lead screw (7).

4. The deburring equipment for high-frequency straight seam welded pipe production according to claim 3, characterized in that, A displacement sensor (10) is provided on the gantry frame (501) on the side opposite to the steel pipe conveying direction. The displacement sensor (10) can monitor the displacement change of the gantry frame (501) relative to the lifting frame (4). When the change of the gantry frame (501) on the side opposite to the steel pipe conveying direction exceeds the threshold, the lead screw (7) rotates, the height of the lead screw (7) is increased, and the tool is retracted.

5. The deburring equipment for high-frequency straight seam welded pipe production according to claim 4, characterized in that, The guide structure on the adjusting component (6) is inclined upward along the conveying direction of the steel pipe.

6. The deburring equipment for high-frequency straight seam welded pipe production according to claim 2, characterized in that, The lifting frame (4) includes a connecting frame (401) and a telescopic cylinder (404). The bottom of the connecting frame (401) is fixedly connected to the floating rod (502). The bottom of the connecting frame (401) is provided with a connecting groove (402). The telescopic cylinder (404) is fixedly connected to the support beam (3). The telescopic cylinder (404) is connected to the connecting groove (402) by bolts. Gaskets (403) are provided between the two end faces of the telescopic cylinder (404) and the connecting groove (402).

7. The deburring equipment for high-frequency straight seam welded pipe production according to claim 4, characterized in that, The adjusting component (6) includes a guide groove (601), which is a guiding structure. Both sides of the guide groove have sliding grooves. The adjusting block (8) clamps the sliding grooves on both sides by a slider. The guide groove (601) is provided with a limiting rod (602) at the crossbeam of each portal frame (501). The limiting rod (602) passes through the crossbeam. An elastic sleeve (603) is provided between the guide groove (601) and the crossbeam. The elastic sleeve (603) is elastic.

8. The deburring equipment for high-frequency straight seam welded pipe production according to claim 7, characterized in that, The guide groove (601) is capable of floating, with a maximum floating amount of 0.05mm.

Images