External weld reinforcement removal device for high frequency welded pipe

Abstract

The utility model discloses a kind of outer welding rib removing devices for high-frequency welded pipe, the device includes fixed platform, it is equipped with axial guide rail and axial lead screw;Scraping tool assembly is slidably connected on axial guide rail, the component is driven transverse sliding table by longitudinal feeding mechanism, and three-dimensional precision positioning of horizontal scraping tool is realized by cooperating XZ adjusting component;Three-jaw chuck driven by chuck driving motor is installed at one end of axial guide rail, and the other end is arranged with the feeding wheel group and double V-shaped guide wheel group of feeding assembly. When working, the welded pipe is clamped and rotated by three-jaw chuck, while servo motor drives the feeding wheel group to advance axially, and the outer welding rib is synchronously removed by horizontal scraping tool. It significantly improves scraping precision (error≤0.1mm) and efficiency (single pipe processing≤30 seconds), and the deformation rate of thin-walled pipe is less than 2%.

Description

Technical Field

[0001] This utility model relates to the field of welded pipe manufacturing equipment, and in particular to a device for removing external weld beads for high-frequency welded pipes. Background Technology

[0002] High-frequency welded pipe is a type of metal pipe welded using resistance heating generated by high-frequency current. It is one of the most widely used types of welded steel pipes in modern industry. During the manufacturing process, after the metal strip is formed and welded, raised weld beads (burrs) are formed on the outer surface of the weld. Traditional weld bead removal processes have three major drawbacks: 1. Low efficiency of manual grinding: Relying on workers to grind with hand-held grinding wheels, it takes 3-5 minutes for a single Φ114×6mm welded pipe, resulting in poor surface uniformity and serious dust pollution. 2. Weak adaptability of fixed turning: The welded pipe is held in a chuck and rotated, and cut with a fixed cutting tool, but precise centering is required (error ≤0.1mm). Adjustment by changing gauges takes more than 30 minutes, and it cannot handle slight bending of the pipe (bending degree >2‰). 3. Inaccurate feed control: Some equipment uses friction wheels to propel the welded pipe, and the axial feed speed fluctuates by ±15%, resulting in uneven scraping depth (fluctuation ±0.2mm), causing scratches or residual weld beads. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a device for removing external weld beads for high-frequency welded pipes.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a device for removing external weld beads from high-frequency welded pipes, comprising a fixed platform, an axial guide rail and an axial screw on the fixed platform, an axial motor connected to the end of the axial screw, and the extension direction of the axial guide rail being parallel to the axis of the welded pipe; a scraper assembly is slidably connected to the axial guide rail, the horizontal scraper of the scraper assembly being correspondingly arranged to the outer wall of the welded pipe; a chuck assembly is provided at one end of the axial guide rail, the chuck assembly including a three-jaw chuck for clamping the end of the welded pipe and a chuck drive motor for driving the three-jaw chuck to rotate; a feeding assembly is provided at the other end of the axial guide rail, the feeding assembly including a feed wheel set supporting the free end of the welded pipe and a servo motor for driving the feed wheel set.

[0006] As a preferred embodiment of this utility model, the scraper assembly includes: a scraper slide table, slidably connected to the axial guide rail; a longitudinal feed mechanism, fixed on the scraper slide table, including a longitudinal lead screw and at least two longitudinal guide rods parallel to the longitudinal lead screw; a transverse slide table, assembled on the longitudinal lead screw via a lead screw nut and slidably engaged with the longitudinal guide rods; a slide table drive motor, drivingly connected to the longitudinal lead screw; an XZ adjustment assembly, fixed on the transverse slide table; and a horizontal scraper, mounted on the XZ adjustment assembly.

[0007] As a preferred embodiment of this utility model, the XZ adjustment assembly includes: an X-axis fine-tuning slide, the sliding direction of which is parallel to the welded pipe axis; a Z-axis fine-tuning slide, fixed on the X-axis fine-tuning slide, the sliding direction of which is perpendicular to the welded pipe axis; a quick-change tool holder, fixed on the Z-axis fine-tuning slide; and the horizontal scraper is detachably installed in the quick-change tool holder by a locking bolt, with its tip facing the radial direction of the welded pipe.

[0008] As a preferred embodiment of this utility model, the chuck assembly includes: a chuck base, vertically fixed on a fixed platform; a chuck drive motor, mounted on the chuck base; a belt drive mechanism, connected to the output shaft of the chuck drive motor; and a three-jaw chuck, connected to the belt drive mechanism, with its rotation axis parallel to the axial guide rail.

[0009] As a preferred technical solution of this utility model, the feeding assembly includes: a feeding base, fixed to the end of the axial guide rail; two sets of feed wheel groups, symmetrically arranged on the feeding base and located on the upper and lower sides of the welded pipe; a synchronous gear set, connecting the two sets of feed wheel groups; a servo motor, which is connected to one of the feed wheel groups for transmission; and a double V-shaped guide wheel set, arranged on the side of the feeding base near the chuck assembly.

[0010] As a preferred technical solution of this utility model, each set of feed rollers includes: an active roller, coaxially connected to the output shaft of a servo motor; and a driven roller, meshing with the active roller through a synchronous gear; the axes of the active roller and the driven roller are both perpendicular to the feed direction of the welded pipe.

[0011] As a preferred embodiment of this utility model, the double V-shaped guide wheel assembly includes two pairs of V-shaped rollers, which are symmetrically distributed along the center of the welded pipe; the center line of the opening of each pair of V-shaped rollers coincides with the axis of the welded pipe; the V-shaped rollers form elastic contact with the outer wall of the welded pipe through a spring preload mechanism.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The rotary feed coordination system forms a continuous spiral cutting path, achieving efficient removal of weld beads; the XZ dual-dimensional fine adjustment mechanism ensures precise positioning of the scraper and eliminates surface defects; the quick-change tool holder design greatly improves tool changing efficiency and reduces downtime losses.

[0014] 2. The double V-shaped guide wheel set automatically compensates for pipe size deviations and bending deformation; the symmetrical feed wheel set provides stable clamping force and suppresses processing vibration;

[0015] 3. The modular structure is adapted to continuous production lines, enabling unmanned operation; the servo system precisely controls the feed parameters and is compatible with the processing of multiple specifications of pipes. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is the front view of this utility model;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a side view of the present invention;

[0021] In the diagram: 1. Fixed platform; 2. Scraper assembly; 3. Chuck assembly; 4. Feeding assembly; 11. Axial guide rail; 12. Axial lead screw; 13. Axial motor; 21. Scraper slide; 22. Longitudinal lead screw; 23. Longitudinal guide rod; 24. Transverse slide; 25. Slide drive motor; 26. XZ adjustment assembly; 27. Horizontal scraper; 31. Chuck base; 32. Chuck drive motor; 33. Three-jaw chuck; 41. Feeding base; 42. Feed wheel assembly; 43. Synchronous gear set; 44. Servo motor; 45. V-shaped guide wheel assembly; 261. X-axis fine-tuning slide; 262. Z-axis fine-tuning slide; 263. Quick-change tool holder; 421. Driving roller; 422. Synchronous gear; 423. Driven roller. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] In the attached diagram, all identical reference numerals refer to the same components.

[0024] Example 1, such as Figure 1-4 As shown, this utility model provides a device for removing external weld beads for high-frequency welded pipes, designed for welded pipes with diameters of Φ60-165mm, and includes four core modules:

[0025] 1. Fixed Platform 1: A welded steel plate base with two parallel axial guide rails 11 mounted on its surface. The guide rail installation accuracy is ±0.1mm / m. The axial screw 12 is installed parallel to the axial guide rails 11; the axial motor 13 is directly connected to the axial screw 12 via a coupling.

[0026] 2. Scraper Assembly 2: The scraper slide 21 is connected to the axial guide rail 11 via a ball bearing slider, achieving an axial sliding stroke of 2m. A longitudinal lead screw 22 and double longitudinal guide rods 23 form a feed mechanism, driving the transverse slide 24 to move radially. The slide drive motor 25 drives the longitudinal lead screw 22 via a reducer. An X-axis fine-tuning slide 261 (manual ±10mm) is stacked on top of a Z-axis fine-tuning slide 262 (manual ±5mm), with a quick-change tool holder 263 mounted on top. The horizontal scraper 27 (made of cemented carbide) is locked to the tool holder by a pressure block; the blade tip height is adjustable to ±0.05mm of the pipe diameter.

[0027] 3. Chuck Assembly 3: The chuck base 31 is vertically fixed to the end of the platform 1 with anchor bolts. The chuck drive motor 32 is driven by a double-groove pulley with a reduction ratio of 1:2.5. The parallelism between the rotation axis of the three-jaw chuck 33 and the guide rail 11 is ≤0.03mm.

[0028] 4. Feeding assembly 4: The feeding base 41 is bolted to the end of the guide rail 11. The feed roller assembly 42 is symmetrical: the upper roller is the driving roller 421 directly connected to the servo motor 44, and the lower roller is the driven roller 423 driven by the synchronous gear 422. The double V-shaped guide roller assembly 45 has a roller inclination angle of 60°, a spring preload of approximately 80N, and a guiding accuracy of ±0.2mm.

[0029] The method of using this utility model is as follows:

[0030] 1. Chuck 33 clamps the welded pipe → motor 32 drives rotation;

[0031] 2. Servo motor 44 drives the welded pipe axially;

[0032] 3. Use the horizontal scraper 27 to scrape away the weld bead to a preset depth of 0.1-0.3mm.

[0033] Example 2, please refer to the appendix. Figure 3 To accommodate welded pipes with large diameters of Φ165-219mm, the key structural reinforcements are as follows:

[0034] Axial guide rail 11: Upgraded cross-sectional dimensions, increasing load capacity by 50%. Scraper assembly 2: Slide table drive motor 25 increased to 1.5kW, longitudinal lead screw 22 lead extended to 12mm. Quick-change tool holder 263 is equipped with an auxiliary support arm, improving vibration resistance.

[0035] Feeding assembly 4: The width of the feed rollers in the feed wheel group 42 has been increased to 120mm, and the clamping pressure has been increased to 300N. The preload spring stiffness of the double V-shaped guide wheel group 45 has been increased by 30%. After verification, the scraping pressure stability has been improved, and the radial runout is ≤0.1mm when processing Φ219mm pipes.

[0036] Example 3, for welded pipes of different materials: Horizontal scraper 27 material: 1. Carbon steel welded pipe: carbide blade with a rake angle of 8°; 2. Stainless steel welded pipe: replace with CBN blade, rake angle of 5°;

[0037] Chuck assembly 3: Enhanced scraper adjustment function based on embodiment 1:

[0038] Longitudinal feed mechanism: A longitudinal lead screw 22 (lead 2mm) and two longitudinal guide rods 23 are mounted parallel to each other on the scraper slide 21; Transverse slide 24: Connected to the longitudinal lead screw 22 via a lead screw nut, driven by a slide drive motor 25 (stepper motor with a step angle of 0.9°) to achieve a Z-axis displacement accuracy of ±0.01mm. XZ adjustment assembly 26: X-axis fine-tuning slide 261: Manually adjustable with a micrometer head, stroke ±10mm, scale value 0.02mm; Z-axis fine-tuning slide 262: Superimposed on the X-axis fine-tuning slide 261, fine-tuning amount ±5mm; Quick-change tool holder 263: Built-in trapezoidal groove, used to fix the horizontal scraper 27 with an M8 locking bolt.

[0039] Cutting accuracy control: When machining Φ50×1.5mm thin-walled tubes: the slide drive motor 25 drives the transverse slide 24 to move down, so that the scraper 27 cuts to a depth of 0.2mm; the Z-axis fine-tuning slide 262 compensates for the tube diameter tolerance (+0.3mm) to avoid overcutting; the X-axis fine-tuning slide 261 has an axial positioning error ≤0.05mm.

[0040] This invention relates to a device for removing the outer weld bead of high-frequency welded pipes. Through a precise mechanical structure (guide rail, lead screw, servo drive, and fine-tuning slide), it achieves stable rotation of the welded pipe, precise axial feeding, and accurate positioning and feeding of the scraper. Utilizing the helical cutting principle, it efficiently removes the outer weld bead from the high-frequency welded pipe. Its modular design (scraper assembly, chuck assembly, and feeding assembly) and adjustment functions give it good adaptability and processing accuracy.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A device for removing external weld beads for high-frequency welded pipes, comprising a fixed platform (1), characterized in that: The fixed platform (1) is provided with an axial guide rail (11) and an axial screw (12). The end of the axial screw (12) is connected to an axial motor (13). The extension direction of the axial guide rail (11) is parallel to the axis of the welded pipe. A scraper assembly (2) is slidably connected to the axial guide rail (11). The horizontal scraper (27) of the scraper assembly (2) is correspondingly arranged to the outer wall of the welded pipe. A chuck assembly (3) is provided at one end of the axial guide rail (11). The chuck assembly (3) includes a three-jaw chuck (33) that clamps the end of the welded pipe and a chuck drive motor (32) that drives the three-jaw chuck (33) to rotate. A feeding assembly (4) is provided at the other end of the axial guide rail (11). The feeding assembly (4) includes a feed wheel group (42) that supports the free end of the welded pipe and a servo motor (44) that drives the feed wheel group (42).

2. The device for removing external weld beads for high-frequency welded pipes according to claim 1, characterized in that, The scraper assembly (2) includes: a scraper slide (21) slidably connected to the axial guide rail (11); a longitudinal feed mechanism fixed on the scraper slide (21), including a longitudinal lead screw (22) and at least two longitudinal guide rods (23) parallel to the longitudinal lead screw (22); a transverse slide (24) assembled on the longitudinal lead screw (22) by a lead screw nut and slidably engaged with the longitudinal guide rods (23); a slide drive motor (25) drivingly connected to the longitudinal lead screw (22); an XZ adjustment assembly (26) fixed on the transverse slide (24); and a horizontal scraper (27) mounted on the XZ adjustment assembly (26).

3. The device for removing external weld beads for high-frequency welded pipes according to claim 2, characterized in that, The XZ adjustment assembly (26) includes: an X-axis fine-tuning slide (261) with its sliding direction parallel to the welded pipe axis; a Z-axis fine-tuning slide (262) fixed on the X-axis fine-tuning slide (261) with its sliding direction perpendicular to the welded pipe axis; a quick-change tool holder (263) fixed on the Z-axis fine-tuning slide (262); and a horizontal scraper (27) detachably installed in the quick-change tool holder (263) by a locking bolt, with its tip facing the radial direction of the welded pipe.

4. The device for removing external weld beads for high-frequency welded pipes according to claim 1, characterized in that, The chuck assembly (3) includes: a chuck base (31) vertically fixed on the fixed platform (1); a chuck drive motor (32) mounted on the chuck base (31); a belt drive mechanism connected to the output shaft of the chuck drive motor (32); and a three-jaw chuck (33) connected to the belt drive mechanism, with its rotation axis parallel to the axial guide rail (11).

5. The device for removing external weld beads for high-frequency welded pipes according to claim 1, characterized in that, The feeding assembly (4) includes: a feeding base (41) fixed at the end of the axial guide rail (11); two sets of feed wheel sets (42) symmetrically arranged on the feeding base (41) and located on the upper and lower sides of the welded pipe; a synchronous gear set (43) connecting the two sets of feed wheel sets (42); a servo motor (44) drivingly connected to one of the sets of feed wheel sets (42); and a double V-shaped guide wheel set (45) arranged on the side of the feeding base (41) near the chuck assembly (3).

6. The device for removing external weld beads for high-frequency welded pipes according to claim 5, characterized in that, Each set of feed rollers (42) includes: an active roller (421) coaxially connected to the output shaft of a servo motor (44); and a driven roller (423) meshing with the active roller (421) via a synchronous gear (422); the axes of the active roller (421) and the driven roller (423) are both perpendicular to the feed direction of the welded pipe.

7. The device for removing external weld beads for high-frequency welded pipes according to claim 5, characterized in that, The double V-shaped guide wheel assembly (45) includes two pairs of V-shaped rollers, which are symmetrically distributed along the center of the welded pipe; the center line of the opening of each pair of V-shaped rollers coincides with the axis of the welded pipe; the V-shaped rollers form elastic contact with the outer wall of the welded pipe through a spring preload mechanism.

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