Low-wear guide and guard device for metal tube material conveying

Abstract

The present application aims to provide a low-wear guide device for metal pipe conveying feeding, which can effectively reduce the wear of the contact surface between the pipe and the supporting device in all directions, reduce the surface damage of the pipe, and improve the continuous feeding positioning accuracy of the pipe. The device comprises a supporting base and a positioning guide plate, and a pair of movable clamping plates are arranged between the positioning guide plates. The inner side of the movable clamping plate is provided with a plurality of spherical movable supporting seats, the spherical movable supporting seat comprises a base part fixed with the movable clamping plate and a rolling ball head movably arranged at the front end of the base part and capable of rotating around the center thereof, and the spherical movable supporting seat can perform translational opening and closing movement with the movable clamping plate and realize clamping or loosening of the metal pipe in a vertical direction plane by using the rolling ball heads on both sides.

Description

Technical Field

[0001] This invention relates to the field of equipment for processing and producing metal pipe workpieces, specifically a low-wear guide device for conveying and feeding metal pipes. Background Technology

[0002] Before processing metal tubes, a guide device is required to ensure the tubes enter and pass through the rolling mill pass accurately and stably, thereby improving the stability of the rolling process and product quality. The main functions of the guide device, besides guiding the tubes into the rolling mill pass in a predetermined direction and state, include preventing collisions or friction with the rolls, reducing irregular deformation and vibration; ensuring stable deformation of the tubes within the pass to obtain the required geometry and dimensions; and smoothly exiting the pass to prevent roll entanglement accidents. Furthermore, the guide device effectively reduces rolling accidents, protects equipment and personnel safety, and improves the working conditions of the rolls, tubes, and the guide itself. The design and use of the guide device are crucial to the smooth progress of the rolling process, and its performance directly affects product quality and production efficiency. Currently, in the actual production and processing of metal tubes, various guide devices are designed to meet different working conditions.

[0003] For example, Chinese invention patent application CN201810586850.2 discloses a fully enclosed guide device for a three-roll skew rolling mill for tubes. The device includes a frame on which a closed guide device is mounted. The closed guide device comprises a hollow cylinder with three grooves on its sidewall that mate with the sidewalls of the three rolls of the three-roll skew rolling mill. The cylinder is used to hold the tube blank. This invention provides a fully enclosed guide device for a three-roll skew rolling mill for tubes that prevents the formation of a tail triangle during tube blank processing, while ensuring uniform tube wall thickness and a simple equipment structure. For example, Chinese utility model patent application CN200920095675.3 discloses a novel inlet guide device for a pipe straightening machine. This device includes a base plate, a bracket fixedly mounted on the base plate, a bracket panel mounted on the upper end of the bracket, two symmetrically arranged rotating shafts on both sides of the bracket panel, side plates symmetrically arranged on the inner side of the rotating shafts, a fixing block at the lower end of the side plate, and a limit block mounted on the bracket panel at the corresponding position of the fixing block. The lower end of the limit block is mounted on a horizontally placed adjusting screw, which is mounted on the lower end of the bracket panel. A handwheel is mounted at the end of the adjusting screw. A bracket is fixedly mounted at the lower middle part of the bracket panel, and a hydraulic cylinder is mounted on the bracket. Connecting rods are mounted on both sides of the hydraulic cylinder, and the connecting rods are connected to the lower end of the rotating shaft. Therefore, this structure can simultaneously control the opening and closing movements of the side plates on both sides, thus improving the alignment effect of the inlet guide device on the straightened steel pipe and ensuring that the straightened steel pipe is properly bitten into the straightening machine. Furthermore, this utility model also has advantages such as simple structure, convenient installation and use, and improved work efficiency.

[0004] However, the applicant discovered that when metal pipes pass through the penetration points of these guide devices, they typically experience significant wear against the supporting components of the equipment. On one hand, this wear causes uncontrollable scratches on the surface of the metal pipes. On the other hand, this situation also leads to significant wear on the guide sleeve components of the guide device during continuous production and processing, resulting in increased positioning errors for the pipes, which can only be corrected by replacing the guide sleeve components. As the size and weight of the pipes increase, the degree of wear also increases rapidly. Furthermore, while conventional roller-type guide mechanisms can reduce wear caused by the translational movement during pipe feeding, the pipes also undergo spiral rotation or reciprocating torsion within a certain angle range during processing. Therefore, the roller components are less effective at mitigating wear during this movement, leading to accelerated wear on the roller components themselves.

[0005] To address the aforementioned problems, this invention provides a low-wear guide device for feeding metal pipes. This device effectively reduces wear on metal pipes that are being fed while simultaneously rotating around their axis during production. It addresses the relative motion between the pipe and the support device in all directions, thereby reducing surface damage to the metal pipe and improving the positioning accuracy of the pipe during continuous feeding. Summary of the Invention

[0006] This invention provides a low-wear guide device for feeding metal pipes. It can effectively reduce wear on metal pipes that are being fed while being transported and rotated around their axis during the production process. This reduces surface damage to the metal pipes and improves the positioning accuracy of the pipes during continuous feeding.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0008] A low-wear guide device for conveying and feeding metal pipes includes a support base at the bottom and two vertically extending positioning guide plates disposed at the front and rear ends of the support base. A pair of movable clamping plates capable of horizontal translation are disposed between the two positioning guide plates. Several spherical movable support seats are also disposed on the inner side of each movable clamping plate. Each spherical movable support seat includes a base portion fixed to the movable clamping plate and a rolling ball head movably disposed at the front end of the base portion and capable of rotating around its own center. The spherical movable support seat can follow the movable clamping plate in a translational opening and closing motion, and uses the rolling ball heads on both sides to clamp or release the metal pipe in a vertical plane.

[0009] As a preferred embodiment of the present invention, a translational guide structure is formed between the positioning guide plate and the movable clamping plate. The translational guide structure includes a guide groove formed on the positioning guide plate and guide portions formed on both sides of the movable clamping plate. The guide portions are fitted into the guide groove and can move translationally along the guide groove. A through hole for a metal pipe to pass through is also provided on the positioning guide plate.

[0010] As a preferred embodiment of the present invention, a pair of spherical movable supports are respectively provided on the movable clamping plates on both sides, the line connecting the spherical movable supports on the movable clamping plate on the same side is oblique, and the lines formed by the spherical movable supports on different movable clamping plates on both sides are intersecting each other.

[0011] As a preferred embodiment of the present invention, three spherical movable supports are respectively provided on the movable clamping plates on both sides. The spherical movable supports on the movable clamping plate on one side are arranged in a triangular pattern, and the spherical movable supports on the movable clamping plate on the other side are arranged in an inverted triangular pattern.

[0012] As a preferred embodiment of the present invention, a threaded engagement structure for adjusting the horizontal position of the rolling ball head is formed between the base portion and the movable clamping plate.

[0013] As a preferred embodiment of the present invention, a synchronization control mechanism for controlling the synchronous opening and closing movement of the two movable clamping plates on both sides and a drive device disposed on the support base and tractably connected to the synchronization control mechanism are further provided between the two movable clamping plates and the support base.

[0014] As a preferred embodiment of the present invention, the synchronization control mechanism includes a drive link movably disposed on the support base. The drive link can rotate around a central axis in the vertical direction under the drive of the drive device. Synchronous guide slots are provided on the drive link and arranged on both sides of the central axis. At the bottom of the two movable clamping plates, downward protruding synchronous opening and closing guide portions are respectively formed. The synchronous opening and closing guide portions are fitted into the synchronous guide slots. The synchronous opening and closing guide portions can reciprocate along the extension direction of the synchronous guide slots and rotate relative to the synchronous guide slots, so that the movable clamping plates on both sides synchronously retract inward or move outward.

[0015] As a preferred embodiment of the present invention, a through strip-shaped guide groove is further provided on the side of the positioning guide plate, the driving device includes a piston rod capable of telescopic translational movement, and a swing connecting section is provided at the front end of the piston rod; one end of the driving connecting rod is formed with a connecting extension section, and the connecting extension section passes outward through the strip-shaped guide groove and is hinged to the swing connecting section.

[0016] In summary, the present invention can achieve the following beneficial effects:

[0017] The low-wear guide device for conveying and feeding metal pipes provided by this invention can effectively reduce wear on metal pipes that are being conveyed and fed horizontally during production and processing, while also rotating around their axis. This reduces surface damage to the metal pipes and improves the positioning accuracy of the pipes during continuous feeding. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a low-wear guide device for feeding metal pipes;

[0019] Figure 2 A side view structural schematic diagram of a low-wear guide device for feeding metal pipes;

[0020] Figure 3 This is a partially enlarged schematic diagram of the translational guide structure;

[0021] Figure 4 This is a partially enlarged schematic diagram of the spherical movable support.

[0022] Figure 5 This is a schematic diagram of the internal synchronization control mechanism of the guide device.

[0023] In the picture:

[0024] A – Metal tubing;

[0025] 1—Support base;

[0026] 2—Positioning guide plate, 201—Through hole, 202—Strip guide groove;

[0027] 3—Modular clamping plate;

[0028] 4—Spherical movable support, 401—Base section, 402—Rolling ball head;

[0029] 5—Translation guide structure, 501—Guide slot, 502—Guide section;

[0030] 6—Threaded engagement structure;

[0031] 7—Synchronous control mechanism, 701—Drive linkage, 7011—Connecting extension section, 702—Synchronous guide slot, 703—Synchronous opening and closing guide section;

[0032] 8—Drive device, 801—Piston rod, 802—Swing connecting section. Detailed Implementation

[0033] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0034] This solution is achieved through the following technical means:

[0035] Example 1: In this example, a low-wear guide device for conveying and feeding metal pipes is provided. It can effectively reduce wear on metal pipes A that are being conveyed and fed in translational direction during production and processing, while also rotating around the axis. This reduces the surface wear and damage of the metal pipes A, and also improves the positioning accuracy of the pipes during continuous feeding.

[0036] Specifically, see the instruction manual appendix. Figure 1The structure shown includes a support base 1 at the bottom, with two vertically extending positioning guide plates 2 fixedly mounted at the front and rear ends of the support base 1 by bolts. A pair of movable clamping plates 3, capable of horizontal translation, are installed in the space between the two positioning guide plates 2. The two positioning guide plates 2 have a set of opposing through holes 201 to allow the metal tube A to be processed to pass through them from front to back. Additionally, at least one positioning guide plate 2 has a horizontally extending strip-shaped guide groove 202 extending through one side of it, located near its lower part.

[0037] The connection structure between the movable clamping plate 3 and the aforementioned positioning guide plate 2 can be found in the attached instruction manual. Figure 3 The enlarged view shows a translational guide structure 5. This translational guide structure 5 includes a guide groove 501 formed on the positioning guide plate 2 and guide portions 502 formed on both sides of the movable clamping plate 3. The guide portions 502 are fitted into the guide groove 501 and can translate along the guide groove 501. It should also be noted that the bottom of the movable clamping plate 3 is L-shaped, forming a forward-extending segment, while the bottoms of the two movable clamping plates 3 are centrally symmetrically arranged, so that the aforementioned extending segments are staggered. A synchronization control mechanism 7 is provided between the movable clamping plate 3 and the support base 1 to control the synchronous outward or inward movement of the two movable clamping plates 3, so as to realize the switching between clamping, supporting, and releasing states of the metal pipe A using the spherical movable support 4.

[0038] Before describing the synchronization control mechanism 7, it is important to explain that a key element of this invention is that several spherical movable support seats 4 are installed on the opposing inner surfaces of the two movable clamping plates 3. Specifically, each spherical movable support seat 4 includes a base portion 401 fixed to the movable clamping plate 3 and a rolling ball head 402 movably disposed at the front end of the base portion 401 and capable of rotating around its own center. The base portion 401 has a cavity portion extending outwards at both ends. The radial dimension of the inner end is larger than the diameter of the rolling ball head 402, while the radial dimension of the outer end is smaller than the diameter of the rolling ball head 402. Therefore, the rolling ball head 402 can be inserted into the cavity portion from the larger end and move to the other end. Since the opening at the other end is smaller, the rolling ball head 402 will not dislodge from that point. At this point, simply installing a support component, such as a push rod or a support spring, inside the cavity will allow the rolling ball head 402 to protrude outward from the base 401 without coming out. When the contact surface is subjected to external frictional force, it can use its own rotation around the center to convert the sliding friction between the components into rolling friction, thereby greatly reducing the wear between the guide device and the continuously forward-pushing metal pipe A.

[0039] It should also be noted that after the metal pipe A passes through the positioning and guiding process of the guide device, it will enter the next processing equipment. The actual processing steps of the pipe in the next equipment may include various forms such as rolling, grinding, or drilling. Therefore, during the continuous feeding process, the metal pipe A will actually rotate continuously along its central axis or reciprocate within a certain angle range while moving horizontally. Therefore, the spherical movable support 4 structure used in this solution, compared with other conventional roller support structures where the rollers can only rotate around a fixed central axis, has the advantage of the rolling ball head 402 used to contact the metal pipe. The rolling ball head 402 can rotate in any direction around its center point under the action of the contact point force, thus ensuring that the friction on the contact surface between the component and the metal pipe is mainly rolling friction, thereby greatly reducing the wear on the surface of the metal pipe and the contact support components in the guide device.

[0040] Of course, based on the above structure, a synchronous control mechanism 7 is also needed to ensure that the movement of the movable clamping plates 3 on both sides and the spherical movable part installed on the inner side is uniform and the same relative to the metal pipe A located at the center during the process of retracting or moving outward together. This avoids generating a support force on one side of the pipe that is not necessary, which could cause the metal pipe A to deviate or bend and deform, affecting the feeding of the pipe and subsequent processing steps.

[0041] Specifically, the synchronization control mechanism 7 here includes a drive link 701 movably mounted on the support base 1. The structure and function of the drive link 701 can be found in the appendix of the instruction manual. Figure 5 As shown in the illustration, it is elongated in shape and horizontally positioned between the two movable clamping plates 3 and the aforementioned support base 1. The drive linkage 701 is capable of rotating about a central axis in the vertical direction. (See attached instruction manual.) Figure 5 Taking the given structure as an example, a cylindrical concave hole can be opened on the aforementioned support base 1, while a downwardly protruding cylindrical part is formed at the middle position of the drive connecting rod 701, and the cylindrical part is inserted into the concave hole, thereby realizing the relative positioning and rotation state between the two components. In order to use the synchronous control mechanism 7 to control the aforementioned two-sided movable clamping movement, the synchronous control mechanism 7 can be further designed to have synchronous guide slots 702 arranged on both sides of the aforementioned vertical central axis on the drive connecting rod 701, and simultaneously, downwardly protruding synchronous opening and closing guide parts 703 are respectively provided at the bottom of the two movable clamping plates 3. The synchronous opening and closing guide parts 703 are fitted into the synchronous guide slots 702, and the synchronous opening and closing guide parts 703 can reciprocate along the extension direction of the synchronous guide slots 702 while rotating relative to the synchronous guide slots 702.

[0042] Also included with the instruction manual Figure 5Taking the given structure as an example, the synchronous guide slots 702 are symmetrically arranged on both sides of the drive link 701 in an elongated shape, and the slots penetrate the drive link 701 in the vertical direction. The aforementioned synchronous opening and closing guides 703 are also actually cylindrical with a downward protrusion. The synchronous opening and closing guides 703 on the two different movable clamping plates 3 are located on the forward extension of the L-shaped bottom of the plate. At this time, these two synchronous opening and closing guides 703 are located above the drive link 701, so that the synchronous opening and closing guides 703 on both sides can be directly opposite the synchronous guide slots 702 below. At the same time, the diameter of the cylindrical section of the synchronous opening and closing guide 703 corresponds to the width of the elongated synchronous guide slots 702, so that after the cylindrical section is inserted into the slot, the two parts abut against each other without affecting the rotation and translation of the cylindrical section inside the slot. It should be further explained that the aforementioned synchronous opening and closing guide 703 is not completely fixedly installed on the bottom of the movable clamping plate 3, but is connected by a sliding engagement structure, allowing the synchronous opening and closing guide 703 to reciprocate relative to the movable clamping plate 3 along an axis parallel to the feeding direction of the metal pipe A. The purpose of this structure is that when the aforementioned drive linkage 701 rotates around the vertical central axis, the synchronous opening and closing guide 702 will move along the synchronous guide hole, that is, the synchronous opening and closing guide 702 actually moves obliquely relative to the positioning guide plate 2 in space. Since the two sides of the movable clamping plate 3 are stopped and restricted by the positioning guide plate 2, this oblique movement is decomposed into two parts: the translation of the movable clamping plate 3 along the strip guide groove 202 and the translation of the synchronous opening and closing guide 703 itself relative to the movable clamping plate 3, thereby realizing the control of the opening and closing translational movement of each spherical movable support seat 4 on both sides of the movable clamping plate 3.

[0043] In this structure, only one vertical force needs to be applied to one end of the drive linkage 701 to drive it to rotate around the hinge center between it and the support base 1. Then, under the pushing and pulling action of the inner wall of the synchronous guide slot 702, the two synchronous opening and closing guide parts 703 will move closer or further away from each other, thereby causing the movable clamping plates 3 on both sides to move closer or further away from each other. At this time, the spherical movable support seats 4 located on the two interactive clamping plates can be used to complete the support and positioning of the metal pipe or to release it.

[0044] To achieve the aforementioned driving action, a driving device 8 should be provided to control the rotation of the aforementioned driving link 701. Specifically, the strip guide groove 202 formed on the side of the positioning guide plate 2 is utilized, and one end of the driving link 701 extends outward to form a connecting extension section 7011. The type of driving device 8 can be a hydraulic cylinder, a starting cylinder, or an electric mechanical telescopic arm mechanism, which includes a piston rod 801 capable of telescopic translation, and a swing connecting section 802 is provided at the front end of the piston rod 801. The two ends of the swing connecting section 802 are respectively hinged to the connecting extension section 7011 that extends outward through the strip guide groove 202 and the front end of the piston rod 801. At this time, the telescopic movement of the piston rod 801 can be used to control the rotation of the driving link 701 and adjust the opening and closing of the movable clamping plates 3 on both sides.

[0045] In the technical solution presented in this embodiment, a structural configuration is selected in which two pairs of spherical movable supports 4 are respectively provided on the movable clamping plates 3 on both sides. (Refer to the appendix of the specification.) Figure 4 The given top-view structural diagram uses four support structures located on the two movable clamping plates 3 as a unit. In this unit, along the front-to-back direction, the spherical movable support 4 on one side of the movable clamping plate 3 has a front-high and back-low layout, while the spherical movable support 4 on the other side of the movable clamping plate 3 has a front-low and back-high layout. This results in the line connecting the spherical movable support 4 on the same side of the movable clamping plate 3 being oblique, and the lines formed by the spherical movable support 4 on the two different movable clamping plates 3 are intersecting each other. At this time, after the metal pipe passes through the two through holes 201 opened on the positioning guide plate 2 in the horizontal direction from front to back, the driving device 8 drives the synchronous control mechanism 7 to control the movable clamping plates 3 on both sides to move closer to each other until the rolling ball heads 402 in the four spherical movable support seats 4 simultaneously abut against the outer wall surface of the pipe, thereby supporting the lower part of the metal pipe and locking and fixing the metal pipe in the vertical plane by the abutment of the upper rolling ball head 402, without affecting the translational conveying and feeding of the pipe in the front and back direction and the rotational movement around its own axis.

[0046] After a period of actual use, the wear levels of the various rolling ball heads 402 components in the guide device are different. This is because, during the forward feeding of the metal pipe A, the lower rolling ball head 402 needs to support the weight of that section of pipe while applying clamping and supporting forces, which often leads to increased wear. On the other hand, the actual surface roughness of the pipe is not uniform, thus still causing uneven wear on the various rolling ball heads 402, which serve as supporting components. Considering the above-mentioned actual working conditions, in this embodiment, the connection structure between the aforementioned base portion 401 and the movable clamping plate 3 is set as a threaded engagement structure 6. Under this structure, by rotating the base portion 401, the horizontal positioning position of the various rolling ball heads 402 at different locations can be adjusted, thereby ensuring that each rolling ball head 402 can maintain a stable and reliable supporting and abutting effect with the metal pipe.

[0047] Example 2: In this example, a low-wear guide device for conveying and feeding metal pipes is provided, which is a further optimized and improved version of the scheme in Example 1. Specifically, based on the original two pairs of spherical movable support seats 4, an additional pair of support seats is added at the rear. Two of the spherical movable support seats 4 in this support seat group are also located on the movable clamping plates 3 on both sides. At this point, three spherical movable support seats 4 are respectively provided on the movable clamping plates 3 on both sides. The spherical movable support seats 4 on one side of the movable clamping plate 3 are arranged in a triangular pattern, while the spherical movable support seats 4 on the other side are arranged in an inverted triangular pattern. The reason for this structural design is that the inventor discovered that if only two pairs of support seats arranged on both sides are used, the pair of spherical movable support seats 4 at the front will generate a first oblique resultant force on the metal pipe, causing the section of the pipe located within the guide device to twist in one direction. The other pair of spherical movable support seats 4 at the rear will also generate a second oblique resultant force on the metal pipe, causing the section of the pipe located within the guide device to twist in the same direction. Therefore, when the metal pipe A passes through the guide device, it will generate a torsional effect on the pipe, causing the front and rear sections of the metal pipe A to...

[0048] Compared to the scheme given in Embodiment 1, this embodiment uses a three-section structure for the spherical movable support 4. Therefore, the two spherical movable supports 4 in the middle group become fulcrums, while the torsional torques generated by the two sets of spherical interactive supports located at the front and rear ends after clamping are in opposite directions. At this time, these two torques largely cancel each other out, thereby greatly reducing the torsional torque acting on the metal pipe portion located outside the guide device. This ensures the stability of the pipe during continuous feeding and processing, and effectively prevents deformation and damage to the pipe.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A low-wear guide device for feeding metal pipes, characterized in that: The system includes a support base (1) at the bottom and two positioning guide plates (2) extending vertically at the front and rear ends of the support base (1). A pair of movable clamping plates (3) capable of horizontal translation are provided between the two positioning guide plates (2). Several spherical movable support seats (4) are also provided on the inner side of the movable clamping plates (3). Each spherical movable support seat (4) includes a base part (401) fixed to the movable clamping plate (3) and a rolling ball head (402) movably disposed at the front end of the base part (401) and capable of rotating around its own center. The spherical movable support seat (4) can follow the movable clamping plate (3). The clamping plate (3) performs a translational opening and closing motion, and uses the rolling ball heads (402) on both sides to clamp or release the metal pipe (A) in a vertical plane; a translational guide structure (5) is formed between the positioning guide plate (2) and the movable clamping plate (3), the translational guide structure (5) includes a guide groove (501) formed on the positioning guide plate (2), and guide portions (502) formed on both sides of the movable clamping plate (3), the guide portions (502) are fitted into the guide groove (501) and can perform translational motion along the guide groove (501); a metal pipe is also provided on the positioning guide plate (2). A through hole (201) through which the material (A) passes; a threaded engagement structure (6) for adjusting the horizontal position of the rolling ball head (402) is formed between the base part (401) and the movable clamping plate (3); a synchronous control mechanism (7) for controlling the synchronous opening and closing movement of the movable clamping plates (3) on both sides and a drive device (8) disposed on the support base (1) and connected to the synchronous control mechanism (7) are also provided between the two movable clamping plates (3) and the support base (1); the synchronous control mechanism (7) includes a drive link (701) movably disposed on the support base (1), the drive link (701) It can rotate around the central axis in the vertical direction under the drive of the drive device (8). The drive link (701) is provided with synchronous guide slots (702) arranged on both sides of the central axis. At the bottom of the two movable clamping plates (3), there are also downward protruding synchronous opening and closing guide parts (703). The synchronous opening and closing guide parts (703) are fitted into the synchronous guide slots (702). The synchronous opening and closing guide parts (703) can reciprocate along the extension direction of the synchronous guide slots (702) and rotate relative to the synchronous guide slots (702), so that the movable clamping plates (3) on both sides can synchronously retract or move outward.

2. The low-wear guide device for feeding metal pipes according to claim 1, characterized in that: A pair of spherical movable support seats (4) are respectively provided on the movable clamping plates (3) on both sides. The line connecting the spherical movable support seats (4) on the same side of the movable clamping plate (3) is oblique, and the line connecting the spherical movable support seats (4) on different movable clamping plates (3) on both sides is intersecting.

3. The low-wear guide device for feeding metal pipes according to claim 1, characterized in that: Three spherical movable support seats (4) are respectively provided on the movable clamping plates (3) on both sides. The spherical movable support seats (4) on one side of the movable clamping plate (3) are arranged in a triangular pattern, and the spherical movable support seats (4) on the other side of the movable clamping plate (3) are arranged in an inverted triangular pattern.

4. The low-wear guide device for feeding metal pipes according to claim 1, characterized in that: A through strip guide groove (202) is also provided on the side of the positioning guide plate (2). The driving device (8) contains a piston rod (801) capable of telescopic translation. The front end of the piston rod (801) is provided with a swing connecting section (802). One end of the driving link (701) is formed with a connecting extension section (7011). The connecting extension section (7011) passes outward through the strip guide groove (101) and is hinged to the swing connecting section (802).

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