High-frequency welded pipe cutting fixing tool

Abstract

The utility model discloses a high -frequency welded pipe cutting fixed frock, including work table, rotary support mechanism, cutting executive mechanism, floating clamping mechanism and position adjusting mechanism. Rotary support mechanism drives welded pipe rotation through the double -supporting roller of area cutting recess groove, and the flexible clamping of two groups of clamping units is carried out to the welded pipe end, and the clamping height is adjustable, and position adjusting mechanism drives the ball screw through servo motor, and drives clamping unit along the guide rail accurate movement to set cutting length, and cutting executive mechanism drives tool vertical feed to complete cutting. Its advantages are: solve the problem of cutting vibration and pipe end swing, realize the fixed length precision of +0.1mm level, and the incision is even and has no burr, and it is applicable to high -frequency welded pipe automatic continuous production.

Description

Technical Field

[0001] This utility model relates to the technical field of welded pipe processing equipment, and in particular to a high-frequency welded pipe cutting and fixing fixture. Background Technology

[0002] In the field of metal pipe processing, high-frequency welded pipes are widely used in industries such as construction and automobile manufacturing due to their high production efficiency and low cost. Welded pipe production lines require the continuous forming of pipes to be cut to a fixed length.

[0003] Traditional cutting fixtures mostly employ fixed clamping in conjunction with saw blade cutting, which has the following drawbacks: poor pipe positioning stability: the pipe body is prone to vibration and displacement during cutting, resulting in tilted cuts or burrs; excessive end clamping rigidity: rigid clamping can easily damage the pipe wall and cannot accommodate the slight deformation of the pipe during rotary cutting; low length adjustment accuracy: relying on manual positioning, the repeatability is insufficient, making it difficult to meet high-precision length requirements; low automation: poor coordination of clamping, rotation, and cutting actions affects continuous production cycle. There is an urgent need for a cutting fixture that combines high stability, flexible clamping, and precise positioning to improve the quality and efficiency of welded pipe cutting. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a high-frequency welded pipe cutting and fixing fixture.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a high-frequency welded pipe cutting fixture, including a worktable, and further comprising: a rotary support mechanism including two support rollers symmetrically arranged on both sides of the worktable surface, each support roller having a cutting groove in the middle and connected to a drive motor; a cutting execution mechanism including a cutting unit movably arranged above the support rollers, and a vertical drive assembly for driving the cutting unit along a direction perpendicular to the worktable; a floating clamping mechanism including two sets of clamping units symmetrically arranged at one axial end of the support rollers for clamping the end of the welded pipe during the cutting process; and a position adjustment mechanism including a translation guide rail fixed to the worktable, and a screw and nut transmission assembly for driving the floating clamping mechanism to move along the translation guide rail.

[0007] In a preferred embodiment of this utility model, in the rotating support mechanism, the two support rollers are linked by meshing synchronous gears; the output shaft of the drive motor is connected to the end of one of the support rollers via a central gear.

[0008] As a preferred embodiment of this utility model, the vertical drive assembly includes: a drive cylinder fixed to the worktable; a vertical sliding plate rigidly connected to the piston rod of the drive cylinder; and vertical guide shafts symmetrically arranged on both sides of the drive cylinder, wherein the vertical sliding plate and the vertical guide shafts are in sliding cooperation.

[0009] As a preferred embodiment of this utility model, the cutting unit includes: a mounting base connected to the vertical drive assembly; a shock-absorbing support fixed to the bottom of the mounting base; and a cutting blade holder and a cutting tool installed below the shock-absorbing support.

[0010] As a preferred embodiment of this utility model, the clamping unit includes: two lower rollers symmetrically arranged at the bottom of the welded pipe; a Y-direction fixed bracket supporting the lower rollers; a height adjusting nut arranged on the Y-direction fixed bracket; an upper roller pressed on the top of the welded pipe; and an L-shaped swing arm with one end hinged to the piston rod of the clamping cylinder, and the other end rotatably mounted with the upper roller.

[0011] As a preferred embodiment of this utility model, the height adjusting nut is threadedly engaged with the threaded post at the bottom of the Y-direction fixed bracket, and the bottom surface of the nut is supported on the slider base of the position adjusting mechanism.

[0012] As a preferred embodiment of this utility model, the ball screw and nut transmission assembly includes: a ball screw arranged parallel to the translation guide rail; a slider base that cooperates with the ball screw through a ball nut pair, the slider base being fixedly connected to the bottom of the clamping unit; and a servo motor that drives the ball screw to rotate, the servo motor being directly connected to the end of the ball screw through a coupling.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. A floating clamping mechanism is used to symmetrically clamp the pipe ends. The upper and lower rollers form a flexible constraint, which not only prevents the welded pipe from swinging during cutting, but also allows the pipe to rotate synchronously with the support rollers, avoiding rigid clamping damage; the height adjustment nut allows for vertical fine adjustment of the clamping point to adapt to different pipe diameters and support height changes, improving compatibility;

[0015] 2. The position adjustment mechanism is driven by a servo motor to drive the ball screw, which in turn drives the clamping unit to move precisely along the translation guide rail, achieving a repeatability positioning accuracy of ±0.1mm for the cutting length; the cutting groove in the middle of the support roller limits the position of the tube axis, ensuring that the rotation center coincides with the tool feed path and avoiding cut deviation;

[0016] 3. The rotating support mechanism is driven by a synchronous gear to force the double support rollers to rotate smoothly. It works in conjunction with the vertical feed of the cutting unit to achieve high-speed, vibration-free cutting. The vertical drive component uses a cylinder in conjunction with a guide shaft to enable the cutting unit to lift and lower quickly, shortening the idle travel time. Attached Figure Description

[0017] 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:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is the front view of this utility model;

[0020] Figure 3 This is a top view of the present invention;

[0021] Figure 4 This is a side view of the present invention;

[0022] Figure 5 This is a schematic diagram of the clamping unit in this utility model;

[0023] In the diagram: 1. Worktable; 2. Rotary support mechanism; 3. Cutting unit; 4. Vertical drive assembly; 5. Clamping unit; 6. Position adjustment mechanism; 21. Support roller; 22. Drive motor; 31. Mounting base; 32. Vibration damping support; 33. Cutting tool holder; 34. Cutting tool; 41. Drive cylinder; 42. Vertical sliding plate; 43. Vertical guide shaft; 51. Lower roller; 52. Y-axis fixed bracket; 53. Height adjusting nut; 54. Upper roller; 55. Clamping cylinder; 56. L-shaped swing arm; 61. Translation guide rail; 62. Screw nut transmission assembly; 621. Ball screw; 622. Slider base; 623. Servo motor. Detailed Implementation

[0024] 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.

[0025] In the attached diagram, all identical reference numerals refer to the same components.

[0026] Example 1, such as Figure 1-5 As shown, this utility model provides a high-frequency welded pipe cutting and fixing fixture, including: a worktable 1: welded from Q235 steel plate, with a length × width of 2000mm × 800mm, serving as the overall base.

[0027] Rotary support mechanism 2: Two support rollers 21 are symmetrically installed on both sides of the worktable 1, with a roller diameter of 150mm and a length of 500mm; a V-shaped cutting groove with a depth of 1.5mm and a width of 15mm is machined in the middle of the support roller 21 to position the welded pipe axis; the drive motor 22 is connected to the end of the left support roller 21 through a central gear; the right support roller 21 and the left support roller 21 are forced to rotate synchronously through the meshing of a synchronous gear with a module of 4.

[0028] Cutting actuator: The cutting unit 3 is located directly above the support roller 21, and the mounting base 31 is fixed to the bottom of the vertical sliding plate 42 by bolts; the shock-absorbing support 32 is a rubber composite layer structure with a thickness of 20mm, connecting the mounting base 31 and the cutting blade holder 33; the cutting blade 34 is a carbide circular saw blade with a diameter of 300mm, installed at the lower part of the cutting blade holder 33. The drive cylinder 41 of the vertical drive assembly 4 has a stroke of 150mm, pushing the vertical sliding plate 42 up and down along two vertical guide shafts 43 with a diameter of 30mm.

[0029] Floating clamping mechanism: Two sets of clamping units 5 are symmetrically arranged on the right end of the support roller 21 (on the welded pipe outlet side); the lower roller 51 is installed on the top of the Y-direction fixed bracket 52, and the roller surface height is flush with the bottom of the cutting groove of the support roller 21; the height adjusting nut 53 is screwed onto the M20 threaded post at the bottom of the Y-direction fixed bracket 52; the short arm end of the L-shaped swing arm 56 is hinged to the piston rod of the clamping cylinder 55, and the long arm end is installed with the upper roller 54 through the bearing.

[0030] Position adjustment mechanism 6: translation guide rail 61 is parallel to the welded pipe axis and has a length of 1800mm; ball screw 621 of screw nut transmission assembly 62 has a lead of 10mm, and servo motor 623 is directly connected to the end of screw through coupling; slider base 622 is engaged with ball nut pair of ball screw 621, and its top surface is bolted to fix the Y-direction fixed bracket 52 of two sets of clamping units 5.

[0031] The method of using this utility model is as follows:

[0032] 1. Place the Φ80mm high-frequency welded pipe into the cutting groove of the support roller 21 → position adjustment mechanism 6 drives clamping unit 5 to move to the set position;

[0033] 2. The clamping cylinder 55 pushes the L-shaped swing arm 56 to make the upper roller 54 press the tube end;

[0034] 3. The drive motor 22 rotates the welded pipe at a speed of 50 r / min, and the drive cylinder 41 pushes the cutting unit 3 down to cut into the groove, completing the fixed-length cutting.

[0035] Example 2, based on Example 1, is optimized for thin-walled welded pipes (wall thickness ≤ 2mm):

[0036] The rotating support mechanism 2 enhances balance: the surface of the cutting groove of the support roller 21 is plated with hard chrome and has a roughness of Ra0.4μm, which reduces the sliding friction of the pipe; the module of the synchronous gear is increased to 6, which improves the stability of the synchronous rotation of the two rollers.

[0037] The position adjustment mechanism 6 has been upgraded in terms of precision: the servo motor 623 is equipped with a 17-bit absolute encoder, which drives the ball screw 621 to achieve a repeatability of ±0.1mm; the slider base 622 adds a linear grating ruler to provide position data feedback.

[0038] Vibration reduction optimization of cutting unit 3: The vibration damping support 32 adopts a three-layer silicone sandwich structure with a thickness increased to 30mm, which attenuates high-frequency vibration by more than 40%; the linear speed of the cutting tool 34 is increased to 120m / min, and the rotation speed of the support roller 21 is adjusted to 80r / min.

[0039] Performance verification: When cutting 0.8mm thick galvanized welded pipe, the burr height of the cut is ≤0.05mm, and the ovality deformation of the pipe end is <0.3mm, which meets the requirements for precision pipe processing.

[0040] Example 3, for production scenarios involving frequent pipe diameter changes:

[0041] Floating clamping mechanism adjustment upgrade: The height adjustment nut 53 is set as a handwheel type with a scale interval of 0.5mm; when switching to Φ120mm welded pipe, rotating the height adjustment nut 53 raises the Y-direction fixed bracket 52 by 5mm, keeping the contact line pressure between the upper roller 54 and the pipe constant (about 150N).

[0042] Cutting groove compatible design: The V-shaped cutting groove angle of the support roller 21 is set to 90°, which can be compatible with pipe diameters of Φ50-150mm; when the pipe diameter changes, the axis of the welded pipe is always on the feed center line of the cutting tool 34.

[0043] Operational advantages: After switching pipe diameters, the clamping height adjustment can be completed in just 30 seconds without the need to change tooling parts.

[0044] This utility model is a high-frequency welded pipe cutting fixture. Through the coordinated operation of multiple mechanisms such as rotary support, floating clamping, and servo positioning, it solves the problems of vibration control, accuracy maintenance, and flexible clamping in welded pipe cutting, significantly improving the cut quality and production automation level. It is suitable for the continuous operation needs of high-speed welded pipe production lines.

[0045] 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 high-frequency welded pipe cutting and fixing fixture, comprising a worktable (1), characterized in that, Also includes: Rotary support mechanism (2): includes two support rollers (21) symmetrically arranged on both sides of the surface of the worktable (1), the support rollers (21) having a cutting groove in the middle, and the support rollers (21) being connected to a drive motor (22); Cutting execution mechanism: includes a cutting unit (3) movably arranged above the support rollers (21), and a vertical drive assembly (4) driving the cutting unit (3) in a direction perpendicular to the worktable (1); Floating clamping mechanism: includes two sets of clamping units (5) symmetrically arranged at one end of the axial direction of the support rollers (21), used to clamp the end of the welded pipe during the cutting process; Position adjustment mechanism (6): includes a translation guide rail (61) fixed on the worktable (1), and a screw and nut transmission assembly (62) driving the floating clamping mechanism to move along the translation guide rail (61).

2. The high-frequency welded pipe cutting and fixing fixture according to claim 1, characterized in that, In the rotating support mechanism (2), the two support rollers (21) are linked by meshing synchronous gears; the output shaft of the drive motor (22) is connected to the end of one of the support rollers (21) through a central gear.

3. The high-frequency welded pipe cutting and fixing fixture according to claim 1, characterized in that, The vertical drive assembly (4) includes: a drive cylinder (41) fixed to the worktable (1); a vertical sliding plate (42) rigidly connected to the piston rod of the drive cylinder (41); and vertical guide shafts (43) symmetrically arranged on both sides of the drive cylinder (41), wherein the vertical sliding plate (42) and the vertical guide shafts (43) are in sliding cooperation.

4. The high-frequency welded pipe cutting and fixing fixture according to claim 1, characterized in that, The cutting unit (3) includes: a mounting base (31) connected to the vertical drive assembly (4); a shock-absorbing support (32) fixed to the bottom of the mounting base (31); a cutting blade holder (33) and a cutting blade (34) installed below the shock-absorbing support (32).

5. The high-frequency welded pipe cutting and fixing fixture according to claim 1, characterized in that, The clamping unit (5) includes: two lower rollers (51) symmetrically arranged at the bottom of the welded pipe; a Y-direction fixed bracket (52) supporting the lower rollers (51); a height adjusting nut (53) arranged on the Y-direction fixed bracket (52); an upper roller (54) pressed on the top of the welded pipe; and an L-shaped swing arm (56) with one end hinged to the piston rod of the clamping cylinder (55), and the other end of which is rotatably mounted with the upper roller (54).

6. The high-frequency welded pipe cutting and fixing fixture according to claim 5, characterized in that, The height adjustment nut (53) is threaded into the threaded post at the bottom of the Y-direction fixed bracket (52), and the bottom surface of the nut is supported on the slider base (622) of the position adjustment mechanism (6).

7. The high-frequency welded pipe cutting and fixing fixture according to claim 1, characterized in that, The lead screw and nut transmission assembly (62) includes: a ball screw (621) arranged parallel to the translation guide rail (61); a slider base (622) that cooperates with the ball screw (621) through a ball nut pair, the slider base (622) being fixedly connected to the bottom of the clamping unit (5); and a servo motor (623) that drives the ball screw (621) to rotate, the servo motor (623) being directly connected to the end of the ball screw (621) through a coupling.

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