CN214080302U - Thin-walled tube clamping and processing device - Google Patents

Abstract

The utility model discloses a thin wall pipe centre gripping processingequipment, include: a frame; the spindle is arranged on the frame, a plurality of first wedge-shaped surfaces and second wedge-shaped surfaces are arranged on the spindle, the first wedge-shaped surfaces and the second wedge-shaped surfaces are distributed at intervals, and the first wedge-shaped surfaces and the second wedge-shaped surfaces are inclined outwards along the radial direction of the spindle; the first expansion blocks are movably arranged on the main shaft, matched with the first wedge-shaped surface and capable of moving on the first wedge-shaped surface to radially and outwards expand relative to the main shaft; the second expansion blocks are movably arranged on the main shaft, matched with the second wedge-shaped surface, can move on the second wedge-shaped surface to radially outwardly expand relative to the main shaft, and form a ring-shaped supporting structure with the first expansion blocks for expanding the thin-walled tube; and the driving mechanism is used for driving the first expansion block and the second expansion block to move so as to expand or separate from the thin-walled tube. The thin-walled tube clamping and processing device can avoid the deformation of the thin-walled tube and ensure the stability of the quality of the processed thin-walled tube.

Description

Thin-walled tube clamping and processing device

Technical Field

The utility model relates to a thin wall pipe centre gripping processingequipment.

Background

In conventional production, before the pipe fitting is machined, the pipe fitting is usually clamped and fixed by two V-shaped blocks, and then the pipe fitting is machined by a machining tool.

However, the V-block clamp is prone to scratching the surface of the pipe and even causing deformation of the pipe. Therefore, in the prior art, a pipe expanding mechanism which expands on the inner side of a pipe fitting to support the inner wall of the pipe fitting appears, but when a movable block of the conventional pipe expanding mechanism is in contact with the inner wall of the pipe fitting in an expanded state, the inner wall of the pipe fitting between adjacent movable blocks cannot be supported, and for a thin-wall pipe, the thin-wall pipe still deforms due to the pipe expanding mechanism, so that the subsequent processing of the thin-wall pipe and the quality of a product are affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an avoid thin wall pipe centre gripping processingequipment of thin wall pipe deformation.

According to the utility model discloses thin wall pipe centre gripping processingequipment, include: a frame; the spindle is arranged on the rack, a plurality of first wedge-shaped surfaces and second wedge-shaped surfaces are arranged on the spindle, the first wedge-shaped surfaces and the second wedge-shaped surfaces are distributed at intervals, and the first wedge-shaped surfaces and the second wedge-shaped surfaces are inclined outwards along the radial direction of the spindle; the first expansion blocks are movably arranged on the main shaft, matched with the first wedge-shaped surface and capable of moving on the first wedge-shaped surface to radially and outwardly expand relative to the main shaft; the second expansion blocks are movably arranged on the main shaft, matched with the second wedge-shaped surface, can move on the second wedge-shaped surface to radially and outwards expand relative to the main shaft, and enclose a ring-shaped supporting structure for expanding the thin-walled tube with the first expansion blocks; and the driving mechanism is connected with the first expansion block and the second expansion block and is used for driving the first expansion block and the second expansion block to move so as to expand or separate from the thin-walled tube.

According to the utility model discloses thin wall pipe centre gripping processingequipment has following beneficial effect at least:

the thin-walled tube clamping and processing device utilizes the driving mechanism to drive the first expansion blocks to move along the first wedge-shaped surface so as to generate radial outward displacement along the main shaft, then the driving mechanism drives the second expansion blocks to move along the second wedge-shaped surface so as to generate radial outward displacement along the main shaft, the second expansion blocks are clamped between two adjacent first expansion blocks, all the first expansion blocks and the second expansion blocks form a ring-shaped supporting structure in a surrounding mode, and the ring-shaped supporting structure can form comprehensive support for the inner wall of the thin-walled tube, so that the thin-walled tube is prevented from deforming, and the stability of the quality of the processed thin-walled tube is ensured.

In some embodiments of the present invention, the main shaft is rotatably disposed on the frame, the main shaft is connected to a rotation driving assembly for driving the main shaft to rotate, the first expansion block is coupled to the driving mechanism through a first coupling member, the first coupling member is opposite to the driving mechanism, so that the first expansion block can follow the main shaft to rotate, the second expansion block is coupled to the driving mechanism through a second coupling member, and the second coupling member is opposite to the driving mechanism to rotate so that the second expansion block can follow the main shaft to rotate.

In some embodiments of the present invention, the rotational drive assembly includes a pulley mechanism, and the driven pulley of the pulley mechanism is disposed on and coaxial with the main shaft.

In some embodiments of the present invention, the driving mechanism includes a first sliding frame and a second sliding frame slidably disposed on the frame, sliding directions of the first sliding frame and the second sliding frame are both parallel to an axial direction of the spindle, and the first sliding frame and the second sliding frame are connected to a driving assembly for driving the first sliding frame and the second sliding frame to slide reciprocally; the first sliding frame is provided with a first rotating cavity for the first linkage member to rotate relative to the first rotating cavity, the second sliding frame is provided with a second rotating cavity for the second linkage member to rotate relative to the second rotating cavity, the first expansion block is movably arranged on the first linkage member and can only move relative to the first linkage member along the radial direction of the main shaft, and the second expansion block is movably arranged on the second linkage member and can only move relative to the second linkage member along the radial direction of the main shaft.

The utility model discloses an in some embodiments, be equipped with first gib block on the first bloated tight piece, first gib block is kept away from the one end of the tight piece of first bloated is equipped with first joint, be equipped with first connection dovetail on the first joint, the extending direction of first connection dovetail is directional the radial of main shaft, be equipped with on the first linkage and be in the first linkage joint portion of first connection dovetail internal motion. The shape of the first linkage joint part is matched with that of the first connection dovetail groove, and the first linkage joint part is prevented from moving along other directions except the extending direction of the first connection dovetail groove.

In some embodiments of the utility model, make completely separate between the surface of first joint and main shaft when avoiding first bloated tight piece to move along first wedge to lead to first gib block to produce and warp, influence thin wall pipe centre gripping processingequipment's motion accuracy, be equipped with on the main shaft and be used for the guide first guide inclined plane of first joint, first guide inclined plane with first wedge surface parallels.

In some embodiments of the present invention, a second guide strip is disposed on the second expansion block, a second joint is disposed at an end of the second guide strip away from the second expansion block, a second connection dovetail groove is disposed on the second joint, an extending direction of the second connection dovetail groove points to a radial direction of the main shaft, and a second linkage joint portion movable in the first connection dovetail groove is disposed on the second linkage member; in order to avoid that the second expansion block completely separates from the surface of the main shaft when moving along the second wedge-shaped surface, so that the second guide strip deforms and the movement precision of the thin-walled tube clamping and processing device is influenced, a second guide inclined surface for guiding the second joint is arranged on the main shaft, and the second guide inclined surface is parallel to the second wedge-shaped surface.

In some embodiments of the present invention, the driving assembly includes a sliding plate disposed on the frame along a radial direction of the main shaft, a linear actuator connected to the sliding plate is disposed on the frame, a first slide and a second slide are disposed on the sliding plate at intervals and extend in a radial direction of the main shaft, a displacement amount a parallel to an axial direction of the main shaft is provided between two ends of the first slide, a displacement amount B parallel to the axial direction of the main shaft is provided between two ends of the second slide, the displacement amount a is greater than the displacement amount B, the first carriage is connected to the first connecting seat capable of being opposite to the second slide, and the second carriage is connected to the second connecting seat capable of being opposite to the first slide.

In some embodiments of the present invention, the second connecting seat is connected to the second sliding frame through a guide tube, the guide tube is slidably disposed in the frame, the first connecting seat is connected to the first sliding frame through a guide rod, the guide rod is slidably disposed inside the guide tube and coaxial with the guide tube, and the above structure is favorable for the compactness of the structure of the thin-wall tube clamping device.

In some embodiments of the present invention, a first dovetail groove is disposed on the first wedge surface, an extending direction of the first dovetail groove is the same as an inclined direction of the first wedge surface, and a first combining portion capable of sliding in the first dovetail groove is disposed on the first expansion block; and a second dovetail groove is arranged on the second wedge-shaped surface, the extending direction of the second dovetail groove is consistent with the inclined direction of the second wedge-shaped surface, and a second combining part capable of sliding in the second dovetail groove is arranged on the second expansion block.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an embodiment of a thin-walled tube clamping device according to the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3 is a partial schematic view of the embodiment of FIG. 1 showing the combination of the spindle, the first expansion block and the second expansion block;

FIG. 4 is a schematic view of the first and second expansion blocks of the embodiment of FIG. 3 shown expanded outwardly relative to the spindle;

fig. 5 is a schematic structural view of the sliding plate of the embodiment of fig. 1 mounted on the frame.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, a thin-walled tube clamping device includes: a frame 100; the spindle 200 is disposed on the frame 100, and a plurality of first wedge-shaped surfaces 210 and second wedge-shaped surfaces 220 are disposed on the spindle 200, the first wedge-shaped surfaces 210 and the second wedge-shaped surfaces 220 are distributed at intervals, and the first wedge-shaped surfaces 210 and the second wedge-shaped surfaces 220 are both inclined outward along a radial direction of the spindle 200; a plurality of first expansion blocks 310 movably disposed on the spindle 200, and engaged with the first wedge-shaped surface 210, and movable on the first wedge-shaped surface 210 to radially outwardly expand relative to the spindle 200; a plurality of second expansion blocks 410, movably disposed on the spindle 200, and engaged with the second wedge-shaped surface 220, and movable on the second wedge-shaped surface 220 to radially outwardly expand relative to the spindle 200, and form a ring-shaped support structure with the first expansion blocks 310 for expanding the thin-walled tube; and the driving mechanism is coupled with the first expansion block 310 and the second expansion block 410 and is used for driving the first expansion block 310 and the second expansion block 410 to move so as to expand or separate the thin-walled tube.

The thin-walled tube clamping and processing device utilizes the driving mechanism to drive the first expansion blocks 310 to move along the first wedge-shaped surface 210 so as to generate outward displacement along the radial direction of the spindle 200, then the driving mechanism drives the second expansion blocks 410 to move along the second wedge-shaped surface 220 so as to generate outward displacement along the radial direction of the spindle 200, the second expansion blocks 410 are clamped between two adjacent first expansion blocks 310, all the first expansion blocks 310 and the second expansion blocks 410 form a ring-shaped supporting structure, the ring-shaped supporting structure is shown in fig. 4, the ring-shaped supporting structure can form comprehensive support for the inner wall of the thin-walled tube, so that the thin-walled tube is prevented from deforming, and the stability of the quality of the processed thin-walled tube is ensured. The thin-walled tube clamping and processing device with the structure can be matched with an external processing cutter to perform end face processing, cutting processing, polishing processing and the like on the thin-walled tube.

It is to be understood that the number of the second expansion blocks 410 may be an integral multiple of the number of the first expansion blocks 310, and accordingly, one or more second expansion blocks 410 may be interposed between two adjacent first expansion blocks 310, and the number of the second wedge surfaces 220 corresponds to the number of the second expansion blocks 410. For example, when the number of the second expansion blocks 410 is twice the number of the first expansion blocks 310, two second expansion blocks 410 sandwiched between two adjacent first expansion blocks 310 may be provided, all the second expansion blocks 410 may be equally divided into two groups, the two groups of the second expansion blocks 410 sequentially move on the second wedge-shaped surface 220 to be radially outwardly expanded relative to the spindle 200, and the two groups of the second expansion blocks 410 and the group of the first expansion blocks 310 together form an annular support structure.

Referring to fig. 1 to 3, in order to enable the thin-walled tube to rotate on the thin-walled tube processing device, in some embodiments of the present invention, the main shaft 200 is rotatably disposed on the frame 100, the main shaft 200 is connected to a rotary driving assembly 600 for driving the main shaft 200 to rotate, the first expansion block 310 is coupled to the driving mechanism through a first linkage 320, the first linkage 320 is rotatable relative to the driving mechanism so that the first expansion block 310 can rotate along with the main shaft 200, the second expansion block 410 is coupled to the driving mechanism through a second linkage 420, and the second linkage 420 is rotatable relative to the driving mechanism so that the second expansion block 410 can rotate along with the main shaft 200.

Referring to fig. 2, in some embodiments of the present invention, the rotation driving assembly 600 includes a pulley mechanism, the driven wheel of the pulley mechanism is disposed on the main shaft 200 and coaxial with the main shaft 200, the pulley mechanism further includes an external motor, the output shaft of the motor is provided with a driving wheel, and the driving wheel is connected to the driven wheel through a belt (the external motor, the driving wheel and the belt are not shown in the figure). Of course, in other embodiments, the rotary driving assembly 600 may alternatively be a motor driving a gear pair to drive the main shaft 200 to rotate.

Referring to fig. 1 and 2, in some embodiments of the present invention, the driving mechanism includes a first sliding frame 510 and a second sliding frame 520 slidably disposed on the frame 100, the sliding directions of the first sliding frame 510 and the second sliding frame 520 are both parallel to the axial direction of the spindle 200, and the first sliding frame 510 and the second sliding frame 520 are connected to a driving assembly 530 for driving the two to slide reciprocally; the first sliding frame 510 is provided with a first rotating cavity for the first linkage member 320 to rotate relative thereto, the second sliding frame 520 is provided with a second rotating cavity for the second linkage member 420 to rotate relative thereto, the first expansion block 310 is movably disposed on the first linkage member 320 and can only move relative to the first linkage member 320 along the radial direction of the spindle 200, and the second expansion block 410 is movably disposed on the second linkage member 420 and can only move relative to the second linkage member 420 along the radial direction of the spindle 200.

Referring to fig. 2, the first linkage member 320 and the second linkage member 420 are both disc-shaped rotating members, and when the first sliding frame 510 moves along the axial direction of the main shaft 200, the first linkage member 320 abuts against the inner wall of the first rotating cavity, and the first sliding frame 510 can drive the first linkage member 320 to move along the axial direction of the main shaft 200; when the second sliding frame 520 moves along the axial direction of the main shaft 200, the second linkage member 420 abuts against the inner wall of the second rotating chamber, and the second sliding frame 520 can drive the second linkage member 420 to move along the axial direction of the main shaft 200.

Referring to fig. 2 and 3, in some embodiments of the present invention, a first guide strip 330 is disposed on the first expansion block 310, correspondingly, a first guide groove matched with the first guide strip 330 is disposed on a surface of the main shaft 200, a first joint 340 is disposed at an end of the first guide strip 330 away from the first expansion block 310, a first connection dovetail groove is disposed on the first joint 340, an extending direction of the first connection dovetail groove points to a radial direction of the main shaft 200, a first linkage combining portion 321 movable in the first connection dovetail groove is disposed on the first linkage member 320, and a shape of the first linkage combining portion 321 matches a shape of the first connection dovetail groove to prevent the first linkage combining portion 321 from moving along other directions except the extending direction of the first connection dovetail groove.

Referring to fig. 2, in order to avoid that the first expansion block 310 completely separates from the surface of the main shaft 200 when moving along the first wedge surface 210, thereby causing the first guide strip 330 to deform and affecting the movement precision of the thin-walled tube clamping device, in some embodiments of the present invention, a first guide inclined surface 230 for guiding the first joint 340 is provided on the main shaft 200, and the first guide inclined surface 230 is parallel to the first wedge surface 210.

Referring to fig. 3, in some embodiments of the present invention, a second guide strip 430 is disposed on the second expansion block 410, correspondingly, a second guide groove matched with the second guide strip 430 is disposed on the surface of the main shaft 200, a second joint 440 is disposed at an end of the second guide strip 430 away from the second expansion block 410, a second connection dovetail groove is disposed on the second joint 440, an extending direction of the second connection dovetail groove points to a radial direction of the main shaft 200, and a second linkage joint 421 movable in the first connection dovetail groove is disposed on the second linkage 420.

Referring to fig. 2, in order to avoid that the second expansion block 410 is completely separated from the surface of the spindle 200 when moving along the second wedge surface 220, and thus the second guide bar 430 is deformed, which affects the movement accuracy of the thin-walled tube clamping device, a second guide inclined surface 240 for guiding the second joint 440 is provided on the spindle 200, and the second guide inclined surface 240 is parallel to the second wedge surface 220.

Referring to fig. 2 and 5, in some embodiments of the present invention, the driving assembly 530 includes a sliding plate 531 slidably disposed on the frame 100 along a radial direction of the main shaft 200, the frame 100 is provided with a linear actuator 532 connected to the sliding plate 531, the linear actuator 532 is configured to drive the sliding plate 531 to slide reciprocally along a direction orthogonal to an axial direction of the main shaft 200, the sliding plate 531 is provided with a first slideway 533 and a second slideway 534 spaced apart from each other and extending along the radial direction of the main shaft 200, referring to fig. 5, a displacement a parallel to the axial direction of the main shaft 200 is disposed between two end portions of the first slideway 533, a displacement B parallel to the axial direction of the main shaft 200 is disposed between two end portions of the second slideway 534, the displacement a is greater than the displacement B, the first sliding frame 510 is connected to a first connecting seat 540 slidably connected to the second slideway 534, a second connecting seat 550 is connected to the second sliding frame 520 and can slide relative to the first sliding track 533.

Referring to fig. 1 to 3, the first and second wedge surfaces 210 and 220 are disposed at an end of the main shaft 200 and distributed around an axial circumference of the main shaft 200, and in an initial state, the distance between the first expansion block 310 and the tip of the first wedge-face 210 is smaller than the distance between the second expansion block 410 and the tip of the second wedge-face 220, therefore, in order to form the annular support structure, the first connecting base 540 slides on the second slideway 534 to generate the displacement amount B, the first connecting base 540 pushes the first sliding rack 510 to move by the distance of the displacement amount B, the first expansion blocks 310 linked with the first link members 320 can move to the top ends of the corresponding first wedge surfaces 210, the second connecting seat 550 slides on the first slide 533 to generate a displacement a larger than the displacement B, the second connecting seat 550 pushes the second sliding frame 520 to move by the displacement a, the second expansion blocks 410 linked with the second link members 420 can move to the top ends of the corresponding second wedge surfaces 220.

With the above structure, the first tensioning block 310 and the second tensioning block 410 can be driven to move together by only one driving source, the first tensioning block 310 and the second tensioning block 410 can displace radially outwards relative to the spindle 200 at different rates, and the first tensioning block 310 and the second tensioning block 410 can be completely expanded at the same time to form the above annular supporting structure, the driving mechanism is very ingenious, and the structure of the driving assembly 530 is greatly simplified.

Referring to fig. 2, in some embodiments of the present invention, the second connecting seat 550 is connected to the second sliding frame 520 through a guide tube 560, the guide tube 560 is slidably disposed on the frame 100, a sliding sleeve matched with the guide tube 560 is disposed on the frame 100, the first connecting seat 540 is connected to the first sliding frame 510 through a guide rod 570, and the guide rod 570 is slidably disposed inside the guide tube 560 and coaxial with the guide tube 560, which is beneficial to the compactness of the structure of the thin-walled tube clamping device.

Referring to fig. 2 and 3, in some embodiments of the present invention, a first dovetail groove 211 is disposed on the first wedge surface 210, an extending direction of the first dovetail groove 211 is the same as a tilting direction of the first wedge surface 210, a first coupling portion 311 slidable in the first dovetail groove 211 is disposed on the first expansion block 310, and the first coupling portion 311 prevents the first expansion block 310 from moving along a direction other than the extending direction of the first dovetail groove 211; the second wedge-shaped surface 220 is provided with a second dovetail groove 221, the extending direction of the second dovetail groove 221 is consistent with the inclined direction of the second wedge-shaped surface 220, the second expansion block 410 is provided with a second combining portion 411 capable of sliding in the second dovetail groove 221, and the second combining portion 411 prevents the second expansion block 410 from moving along the direction other than the extending direction of the second dovetail groove 221. Wherein the overall shape of the first and second expansion blocks 310, 410 is substantially fan-shaped, see fig. 3 and 4, the larger end of the first expansion block 310 and the larger end of the second expansion block 410 are facing away from each other, so that the first and second expansion blocks 310, 410 can enclose an annular support structure.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A thin wall pipe centre gripping processingequipment which characterized in that includes:

a frame (100);

the main shaft (200) is arranged on the rack (100), a plurality of first wedge-shaped surfaces (210) and second wedge-shaped surfaces (220) are arranged on the main shaft (200), the first wedge-shaped surfaces (210) and the second wedge-shaped surfaces (220) are distributed at intervals, and the first wedge-shaped surfaces (210) and the second wedge-shaped surfaces (220) are inclined outwards along the radial direction of the main shaft (200);

the first expansion blocks (310) are movably arranged on the main shaft (200), are matched with the first wedge-shaped surface (210), and can move on the first wedge-shaped surface (210) to expand radially outwards relative to the main shaft (200);

the second expansion blocks (410) are movably arranged on the main shaft (200), are matched with the second wedge-shaped surface (220), can move on the second wedge-shaped surface (220) to be radially outwards expanded relative to the main shaft (200), and form a ring-shaped supporting structure with the first expansion blocks (310) for expanding the thin-walled tube;

and the driving mechanism is coupled with the first expansion block (310) and the second expansion block (410) and is used for driving the first expansion block (310) and the second expansion block (410) to move so as to expand or separate the thin-walled tube.

2. The thin-walled tube clamping processing device according to claim 1, wherein:

the main shaft (200) is rotatably arranged on the machine frame (100), the main shaft (200) is connected with a rotary driving assembly (600) for driving the main shaft (200) to rotate, the first expansion block (310) is connected with the driving mechanism through a first linkage piece (320), the first linkage piece (320) can rotate relative to the driving mechanism to enable the first expansion block (310) to rotate along with the main shaft (200), the second expansion block (410) is connected with the driving mechanism through a second linkage piece (420), and the second linkage piece (420) can rotate relative to the driving mechanism to enable the second expansion block (410) to rotate along with the main shaft (200).

3. The thin-walled tube clamping processing device according to claim 2, wherein:

the rotary driving assembly (600) comprises a belt wheel mechanism, and a driven wheel of the belt wheel mechanism is arranged on the main shaft (200) and is coaxial with the main shaft (200).

4. The thin-walled tube clamping processing device according to claim 2, wherein:

the driving mechanism comprises a first sliding frame (510) and a second sliding frame (520) which are arranged on the rack (100) in a sliding mode, the sliding directions of the first sliding frame (510) and the second sliding frame (520) are parallel to the axial direction of the main shaft (200), and a driving assembly (530) for driving the first sliding frame (510) and the second sliding frame (520) to slide in a reciprocating mode is connected with the first sliding frame (510) and the second sliding frame (520); the first sliding frame (510) is provided with a first rotating cavity for enabling the first linkage piece (320) to rotate relative to the first rotating cavity, the second sliding frame (520) is provided with a second rotating cavity for enabling the second linkage piece (420) to rotate relative to the second rotating cavity, the first tensioning block (310) is movably arranged on the first linkage piece (320) and can only move relative to the first linkage piece (320) along the radial direction of the main shaft (200), and the second tensioning block (410) is movably arranged on the second linkage piece (420) and can only move relative to the second linkage piece (420) along the radial direction of the main shaft (200).

5. The thin-walled tube clamping processing device according to claim 4, wherein:

be equipped with first gib block (330) on first bloated tight piece (310), keep away from in first gib block (330) the one end of first bloated tight piece (310) is equipped with first joint (340), be equipped with first connection dovetail on first joint (340), the extending direction of first connection dovetail is directional the radial of main shaft (200), be equipped with on first linkage (320) can first linkage joint portion (321) of first connection dovetail internal motion.

6. The thin-walled tube clamping processing device according to claim 5, wherein:

the main shaft (200) is provided with a first guide inclined surface (230) for guiding the first joint (340), and the first guide inclined surface (230) is parallel to the first wedge-shaped surface (210).

7. The thin-walled tube clamping processing device according to claim 5, wherein:

a second guide strip (430) is arranged on the second expansion block (410), a second joint (440) is arranged at one end, away from the second expansion block (410), of the second guide strip (430), a second connection dovetail groove is arranged on the second joint (440), the extending direction of the second connection dovetail groove points to the radial direction of the main shaft (200), and a second linkage combining part (421) capable of moving in the first connection dovetail groove is arranged on the second linkage part (420); and a second guide inclined surface (240) for guiding the second joint (440) is arranged on the main shaft (200), and the second guide inclined surface (240) is parallel to the second wedge-shaped surface (220).

8. The thin-walled tube clamping processing device according to claim 4, wherein:

the driving assembly (530) comprises a sliding plate (531) slidably disposed on the frame (100) in a radial direction of the main shaft (200), a linear driver (532) connected with the sliding plate (531) is arranged on the frame (100), the sliding plate (531) is provided with a first slideway (533) and a second slideway (534) which are arranged at intervals and extend along the radial direction of the main shaft (200), the two ends of the first slideway (533) have a displacement A parallel to the axial direction of the main shaft (200), the two ends of the second slideway (534) have a displacement B parallel to the axial direction of the main shaft (200), the displacement A is larger than the displacement B, the first sliding frame (510) is connected with a first connecting seat (540) which can slide relative to the second slideway (534), the second sliding frame (520) is connected with a second connecting seat (550) which can slide relative to the first sliding rail (533).

9. The thin-walled tube clamping processing device according to claim 8, wherein:

the second connecting seat (550) is connected with the second sliding frame (520) through a guide pipe (560), the guide pipe (560) is arranged on the rack (100) in a sliding mode, the first connecting seat (540) is connected with the first sliding frame (510) through a guide rod (570), and the guide rod (570) is arranged inside the guide pipe (560) in a sliding mode and coaxial with the guide pipe (560).

10. The thin-walled tube clamping processing device according to claim 4, wherein:

a first dovetail groove (211) is formed in the first wedge surface (210), the extending direction of the first dovetail groove (211) is consistent with the inclining direction of the first wedge surface (210), and a first combining part (311) capable of sliding in the first dovetail groove (211) is arranged on the first expansion block (310); the second wedge-shaped surface (220) is provided with a second dovetail groove (221), the extending direction of the second dovetail groove (221) is consistent with the inclined direction of the second wedge-shaped surface (220), and the second expansion block (410) is provided with a second combination part (411) which can slide in the second dovetail groove (221).

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