Pipe expanding and channeling mechanism and pipe expanding and channeling device

Abstract

The utility model discloses a pipe expansion channeling mechanism and a pipe expansion channeling device. The pipe expansion channeling mechanism is characterized by comprising a bottom plate, an expansion main body and a clamping main body, wherein the expansion main body and the clamping main body are arranged on the bottom plate; the clamping main body is coaxially arranged outside the expansion main body; the clamping body comprises a plurality of clamping assemblies annularly distributed outside the expansion body, each clamping assembly comprises a clamping block and a first hydraulic cylinder arranged outside the clamping block, the first hydraulic cylinders are configured to drive the clamping blocks to be close to or away from the expansion body, an arc-shaped groove is formed in the inner wall of each clamping block, and the arc-shaped grooves are communicated with the clamping assemblies. The plurality of arc-shaped grooves form a first annular groove; the expansion main body comprises a pushing part, an expansion assembly arranged outside the upper portion of the pushing part in a sleeving mode and a reset piece arranged outside the expansion assembly in a sleeving mode, and the pushing part and the reset piece drive the expansion assembly to be opened and reset. According to the utility model, the processing efficiency is improved, and the labor intensity of operators and the labor cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe production and processing field, especially to an expanding pipe and rolling groove mechanism and an expanding pipe and rolling groove device, and is particularly suitable for the expanding pipe and rolling groove of a downpipe. BACKGROUND

[0002] In the pipeline of the downpipe, heat exchanger and condenser in the construction industry, expanding pipe and rolling groove are needed at the end to facilitate connection with other pipelines. In the prior art, the expanding pipe and rolling groove of the pipeline generally use an expanding pipe machine to first expand the pipe, and then use a rolling groove machine to roll the groove at the expanded position of the pipe. For example, as shown in Figure 1a 、 1b and Figure 1a , the structure after expanding pipe includes a pipe fitting 501 and an expanding pipe 502 at the end of the pipe fitting, Figure 1b a rolling groove 503 (internal rolling groove structure) at the expanding pipe. In this way, the following disadvantages exist:

[0003] 1. More procedures are needed, and multiple devices and multiple workers are needed to complete the work. One worker is needed for one expanding pipe device, another worker is needed for another rolling groove device, and one worker is needed to transport materials from the expanding pipe device to the rolling groove device. The labor intensity of the operator will be higher, the efficiency will be lower, and the labor cost and equipment cost will be higher.

[0004] 2. The device capable of processing long pipes can also process short pipes, but the device for processing short pipes is not convenient for processing long pipes, which has great limitations (short pipes require less space, long pipes require more space, short pipes can be quickly processed by hand, long pipes have high labor intensity, and the positioning part is convenient). If long pipes and short pipes need to be processed in the same batch, the processing efficiency will be seriously affected. SUMMARY

[0005] The utility model aims at providing an expanding pipe and rolling groove mechanism and an expanding pipe and rolling groove device, which can reduce the processing procedures and improve the expanding pipe and rolling groove efficiency by using the structure.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of an expanding pipe and rolling groove mechanism, which includes a bottom plate, an expanding main body and a clamping main body installed on the bottom plate.

[0007] The clamping main body is coaxially arranged outside the expanding main body.

[0008] The clamping body comprises a plurality of sets of clamping assemblies arranged outside the expansion body, each clamping assembly comprises a clamping block and a first hydraulic cylinder arranged outside the clamping block, the first hydraulic cylinder is configured to drive the clamping block to be arranged close to or away from the expansion body, and an inner wall of each clamping block is provided with an arc-shaped groove, and a plurality of arc-shaped grooves form a first annular groove.

[0009] The expansion body comprises a pushing part, an expansion assembly arranged outside the pushing part, and a reset member arranged outside the expansion assembly, the expansion assembly comprises a plurality of expansion blocks arranged outside the pushing part, the lower outer surface of the expansion block is provided with an arc-shaped protrusion opposite to the arc-shaped groove, a plurality of arc-shaped protrusions form a first annular protrusion opposite to the first annular groove, and the reset member is arranged outside the plurality of expansion blocks; the pushing part pushes the plurality of expansion blocks to be arranged away from the axis of the pushing part, and the reset member pushes the expansion blocks to be arranged close to the axis of the pushing part.

[0010] In the above technical solution, the upper outer surface or top surface of the expansion block is provided with a mounting groove, and the mounting grooves of the plurality of expansion blocks form a second annular mounting groove, and the reset member is arranged in the second annular mounting groove.

[0011] And / or, the reset member is a spring ring or an elastic rubber ring.

[0012] In the above technical solution, the bottom plate is provided with a through hole, the clamping assembly is coaxially arranged on the top surface of the bottom plate outside the through hole, the lower part of the expansion assembly is coaxially arranged in the through hole, and the clamping assembly is arranged outside the expansion assembly.

[0013] In the above technical solution, the pushing part comprises a conical push rod and a vertical driving member for driving the conical push rod to move vertically, the center of the expansion assembly is provided with a conical hole matched with the conical push rod, the upper part of the conical push rod is inserted into the conical hole, and the outer surface of the conical push rod abuts against the inner wall of the conical hole, and the outer diameter of the top of the conical push rod is smaller than the outer diameter of the bottom of the conical push rod.

[0014] The top of the vertical driving member is connected with the bottom surface of the bottom plate through a support, and the bottom of the conical push rod is connected with the driving end of the vertical driving member.

[0015] A supporting plate is further provided, the supporting plate is connected with the support, the bottom surface of the expansion assembly abuts against the bottom surface of the supporting plate, the bottom of the expansion block is slidingly arranged on the supporting plate, and the supporting plate is provided with a clearance hole opposite to the conical hole.

[0016] In the above technical solution, the inner side surface of each expansion block is an arc-shaped inclined surface inclined outward from top to bottom, and a plurality of arc-shaped inclined surfaces form the conical hole.

[0017] The technical scheme further comprises a ring-shaped limiting block arranged above the clamping assembly, and the outer edge of the ring-shaped limiting block is connected to the bottom plate through a plurality of fixing plates.

[0018] The technical scheme further comprises a ring-shaped limiting block arranged above the clamping assembly, and the outer edge of the ring-shaped limiting block is connected to the bottom plate through a plurality of fixing plates.

[0019] When the output shaft of the first hydraulic cylinder is retracted, the outer surface of the clamping block abuts against the inner surface of the ring-shaped limiting block; when the output shaft of the first hydraulic cylinder is extended, the plurality of clamping blocks form a ring-shaped structure, and the side walls of adjacent clamping blocks are in contact.

[0020] The bottom surface of the bottom plate is provided with a sector-shaped rack coaxially arranged with the expansion body; a motor and a gear are further arranged, the gear is engaged with the sector-shaped rack, the motor is configured to drive the gear to rotate, and the bottom plate, the expansion body and the clamping body mounted on the bottom plate are synchronously rotated.

[0021] The utility model also provides a kind of pipe expansion and groove rolling device, including machine body, the machine body is also equipped with the pipe expansion and groove rolling mechanism of above, the machine body is equipped with two groups of pipe expansion and groove rolling mechanism perpendicular to each other, one group of the pipe expansion and groove rolling mechanism is arranged on the top of the machine body, and another group of the pipe expansion and groove rolling mechanism is arranged on the side wall of the machine body.

[0022] The technical scheme further comprises a conveying line, the end of the conveying line is opposite to the machine body or in contact with the side wall of the machine body, and the conveying line is provided with a product placement position opposite to the pipe expansion and groove rolling mechanism arranged on the side wall of the machine body.

[0023] Compared with the prior art, the utility model has the following advantages due to the use of the above technical scheme:

[0024] 1. In the utility model, two groups of pipe expansion and groove rolling mechanisms perpendicular to each other are arranged on the machine body, and a conveying line is arranged, so that one group of pipe expansion and groove rolling mechanisms can be used to expand and groove long pipes, and another group of pipe expansion and groove rolling mechanisms can be used to expand and groove short pipes, thereby improving the scope of application and processing efficiency.

[0025] 2. The pipe expanding and grooving mechanism in the utility model adopts clamping main body and expanding main body, the first annular groove is arranged on the upper surface of the clamping main body, the first annular protrusion is arranged on the upper surface of the expanding main body and faces the first annular groove, the pipe is inserted between the clamping main body and the expanding main body, the pipe expanding action of the product can be realized by the mutual approaching of the clamping main body and the expanding main body, and the fast grooving action is carried out by the first annular protrusion and the first annular groove at the same time of the pipe expanding, the pipe expanding and grooving one-time forming are realized, the process is effectively shortened, the production efficiency is improved, and the labor cost and the production cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1a 、 Figure 1b is a structural schematic diagram in the background art;

[0027] Figure 2 is a structural schematic diagram of the pipe expanding and grooving mechanism in the first embodiment of the utility model;

[0028] Figure 3 is a structural schematic diagram of another view in the first embodiment of the utility model; Figure 2

[0029] Figure 4 is a structural schematic diagram of the pipe expanding and grooving mechanism in the first embodiment of the utility model (the annular limiting plate and the fixed plate are not shown);

[0030] Figure 5 is a sectional view structural schematic diagram of the pipe expanding and grooving mechanism in the first embodiment of the utility model;

[0031] Figure 6 is a sectional view structural schematic diagram of the expanding assembly in the first embodiment of the utility model;

[0032] Figure 7 is a structural schematic diagram of a clamping block in the utility model;

[0033] Figure 8 is a structural schematic diagram of the pipe expanding and grooving device in the first embodiment of the utility model.

[0034] ​Wherein: 1, the bottom plate; 11, the through hole; 12, the annular limiting plate; 13, the fixed plate; 14, the fan-shaped rack; 15, the motor; 16, the gear; 17, the hydraulic valve; 2, the expansion main body; 21, the push part; 22, the expansion block; 23, the arc convex; 24, the first annular convex; 25, the installation groove; 26, the second annular installation groove; 210, the conical push rod; 211, the vertical driving part; 212, the conical hole; 213, the support; 214, the supporting plate; 215, the arc slope; 3, the clamping main body; 31, the clamping block; 32, the first hydraulic cylinder; 33, the arc groove; 34, the first annular groove; 35, the annular positioning block; 36, the arc block; 4, the machine body; 41, the pipe expanding and rolling groove mechanism; 42, the conveying line; 501, the pipe; 502, the pipe expanding position; 503, the rolling groove. DETAILED DESCRIPTION

[0035] The utility model will be further described below in combination with the drawings and examples:

[0036] Example one: refer to Figures 2 to 8 The pipe expanding and rolling groove mechanism comprises a bottom plate 1, an expansion main body 2 and a clamping main body 3 installed on the bottom plate;

[0037] The clamping main body 3 is coaxially arranged outside the expansion main body 2;

[0038] The clamping main body 3 comprises a plurality of clamping assemblies arranged outside the expansion main body 2, and each clamping assembly comprises a clamping block 31 and a first hydraulic cylinder 32 arranged outside the clamping block 31; the first hydraulic cylinder 32 is configured to drive the clamping block 31 to move close to or away from the expansion main body 2; and the inner wall of each clamping block 31 is provided with an arc groove 33, and a plurality of arc grooves form a first annular groove 34;

[0039] The expansion main body 2 comprises a push part 21, an expansion assembly arranged outside the push part 21 and a reset member (not shown in the figure) arranged outside the expansion assembly; the expansion assembly comprises a plurality of expansion blocks 22 arranged outside the push part 21; the lower outer surface of each expansion block 22 is provided with an arc convex 23 opposite to the arc groove 33; a plurality of arc convexes 23 form a first annular convex 24 opposite to the first annular groove 34; and the reset member is arranged outside the plurality of expansion blocks 22; the push part 21 pushes the plurality of expansion blocks 22 to be arranged away from the axis of the push part 21, and the reset member pushes the expansion blocks 22 to be arranged close to the axis of the push part 21. In this embodiment, a hydraulic valve 17 and a hydraulic pump are arranged on the bottom plate; the hydraulic valve and the hydraulic pump are connected with the plurality of first hydraulic cylinders through pipelines.

[0040] In the embodiment, the annular gap is provided between the clamping body and the expanding body, the end of the pipe (product) is inserted into the annular gap between the clamping body and the expanding body when the pipe end is expanded and grooved, at this time, the inner wall of the product is in contact with or has a slight gap with the outer surface of the expanding block, and the outer wall of the product has a gap with the inner surface of the clamping block, then all the output shafts of the first hydraulic cylinders are extended to drive the corresponding clamping blocks to move inward, the pushing part also works at the same time when the output shafts of the first hydraulic cylinders are extended, and all the expanding blocks are synchronously pushed outward, so that the first annular protrusion is in contact with the inner wall of the pipe first and then continues to move outward, the end of the pipe is expanded by the outward movement of the first annular protrusion and the expanding block, so that the end of the pipe is opened, and then the outer wall of the product is in contact with the inner wall of the clamping block, at this time, the first annular protrusion also pushes the product at the first annular protrusion into the first annular groove, so that the end of the product is expanded and grooved. Then the pushing part is reset, and the output shafts of the first hydraulic cylinders are also retracted, so that the grooved product is separated from the first annular protrusion and the first annular groove, respectively, and then the product is taken out from the annular gap between the clamping body and the expanding body. When the pushing part pushes the expanding blocks to move outward, the expanding blocks will stretch the reset member. During the resetting process of the pushing part, the restoring force of the reset member will push the expanding blocks to move inward, so that the expanding blocks are automatically reset.

[0041] The upper outer surface or top surface of the expanding block 22 is provided with a mounting groove 25, and the mounting grooves of a plurality of expanding blocks form a second annular mounting groove 26, and the reset member is sleeved in the second annular mounting groove 26.

[0042] The reset member is a spring ring or an elastic rubber ring. In the embodiment, the reset member is a spring ring which is directly sleeved in the second annular groove. The cross section of each expanding block is a fan-shaped structure, when the expanding block moves to the inner end, the side wall of each expanding block is in contact with the side wall of the adjacent expanding block, so that the expanding assembly forms an annular structure. When the expanding block moves outward, the diameter of the spring ring is stretched, so that the spring ring is stretched, and the elastic restoring force of the spring ring is increased. When the pushing part loses the outward pushing force of the expanding block, the restoring force of the spring ring will drive the expanding block to move inward and automatically recover to the original state.

[0043] Referring to Figure 5 The bottom plate 1 is provided with a through hole 11, the clamping assembly is coaxially arranged on the top surface of the bottom plate 1 outside the through hole 11, the lower part of the expanding assembly is coaxially arranged in the through hole 11, and the clamping assembly is arranged outside the expanding assembly.

[0044] Referring to Figures 2 to 7As shown, the pushing part 21 comprises a conical pushing rod 210 and a vertical driving part 211 for driving the vertical movement of the conical pushing rod 210; the central part of the expansion assembly is provided with a conical hole 212 matched with the conical pushing rod 210, the upper part of the conical pushing rod 210 is inserted into the conical hole 212, and the outer surface of the conical pushing rod 210 abuts against the inner wall of the conical hole 212, the outer diameter of the top part of the conical pushing rod 210 is smaller than that of the bottom part of the conical pushing rod 210;

[0045] The top part of the vertical driving part 211 is connected with the bottom surface of the bottom plate 1 through a support 213, and the bottom part of the conical pushing rod 210 is connected with the driving end of the vertical driving part 211.

[0046] A supporting plate 214 is further provided, which is connected with the support 213, the bottom surface of the expansion assembly abuts against the bottom surface of the supporting plate 214, and the bottom part of the expansion block 22 is slidingly arranged on the supporting plate 214, and the supporting plate 214 is provided with a clearance hole opposite to the conical hole 212.

[0047] The inner side surface of each expansion block 22 is an arc-shaped inclined surface 215 inclined outward from top to bottom, and a plurality of arc-shaped inclined surfaces 215 constitute the conical hole 212.

[0048] In this embodiment, the vertical driving part is a vertical hydraulic cylinder, the bottom part of the conical pushing rod is connected with the output shaft of the top part of the vertical hydraulic cylinder, when the output shaft of the vertical hydraulic cylinder is extended, the conical pushing rod is driven to move upward, and when the output shaft of the vertical hydraulic cylinder is retracted, the conical pushing rod is driven to move downward. Since the outer diameter of the top part of the conical pushing rod is smaller than that of the bottom part of the conical pushing rod, when the conical pushing rod moves upward, the outer surface of the lower part of the conical pushing rod gradually moves upward, and since the diameter of the lower part is larger, the expansion block is pushed to move outward through the contact between the conical surface and the arc-shaped inclined surface, so as to realize the pipe expansion of the product, and during the pipe expansion, the rolling groove is realized due to the existence of the first annular protrusion and the first annular groove. The supporting plate is used for supporting the expansion block, and more preferably, a plurality of guide rails are arranged on the supporting plate, the inner ends of the guide rails are arranged opposite to the axis of the clearance hole, the bottom part of each expansion block is slidingly connected with the guide rail, the guide rail can guide and limit the movement of the expansion block, and can also limit the upward and downward movement of the expansion block, so that the expansion block is stably pushed to move outward during the upward movement of the conical pushing rod, and the expansion block is pushed to move inward by the reset part during the downward movement of the conical pushing rod.

[0049] Referring to Figure 2 , 3 , 5, an annular limiting plate 12 is further provided, which is arranged above the clamping assembly, and the outer edge of the annular limiting plate 12 is connected with the bottom plate 1 through a plurality of fixed plates 13.

[0050] In the embodiment, the annular limiting plate is arranged to be connected with the machine body, to form a working surface, and then the fixing plate and the bottom plate are connected to fix the whole pipe expanding and rolling groove mechanism to the machine body.

[0051] As shown in Figure 4 、 5 The bottom plate 1 is further provided with an annular positioning block 35 arranged between the plurality of clamping blocks 31 and the first hydraulic cylinder 32; the output shaft of the first hydraulic cylinder 32 penetrates the annular positioning block 35 and is connected with the clamping block 31.

[0052] When the output shaft of the first hydraulic cylinder 32 is retracted, the outer surface of the clamping block 31 abuts against the inner surface of the annular positioning block 35; when the output shaft of the first hydraulic cylinder 32 is extended, the plurality of clamping blocks 31 form a ring structure, and the side walls of adjacent clamping blocks 31 are in contact.

[0053] In the embodiment, the annular positioning block is composed of a plurality of arc-shaped blocks 36, each arc-shaped block is arranged opposite to a clamping block and a first hydraulic cylinder, the output shaft of the first hydraulic cylinder penetrates the corresponding arc-shaped block and is connected with the corresponding clamping block, the output shaft of the first hydraulic cylinder is movably connected with the arc-shaped block, the arc-shaped block can also support and guide the movement of the output shaft of the first hydraulic cylinder, prevent the output shaft of the first hydraulic cylinder from deforming, and prolong the service life of the first hydraulic cylinder. In this way, one hydraulic cylinder, one arc-shaped block and one clamping block form a module, when a certain module is damaged, only the single module needs to be disassembled and repaired, which is more convenient and cheaper.

[0054] As shown in Figure 3 The bottom surface of the bottom plate 1 is provided with a fan-shaped rack 14 coaxially arranged with the expanding main body; a motor 15 and a gear 16 are further provided, the gear 16 is engaged with the fan-shaped rack 14, the motor 15 is configured to drive the gear 16 to rotate, and synchronously drive the bottom plate 1, the expanding main body and the clamping main body mounted on the bottom plate 1 to rotate synchronously.

[0055] In this embodiment, when the expansion blocks move to the inner end, the plurality of expansion blocks form a ring structure, and the plurality of arc-shaped protrusions form the first ring-shaped protrusion. However, during the outward movement of the expansion blocks, gaps exist between adjacent expansion blocks and between adjacent arc-shaped protrusions. The product at the gap position may not be expanded well, and the gap position may not meet the requirements of expansion and grooving. Similarly, the clamping block also has this problem. Therefore, a sector-shaped rack, a motor, and a gear are also provided. During the outward movement of the expansion blocks and the inward movement of the clamping blocks, the motor drives the gear to rotate by a small angle, for example, 5-10 degrees clockwise and then 5-10 degrees counterclockwise, so that the expansion blocks, the clamping blocks, the arc-shaped grooves, and the arc-shaped protrusions move in a reciprocating rotation manner. This prevents the gap position from being directly opposite the product, ensures that the product needs to be expanded and grooved at the position where the expansion blocks, the clamping blocks, the arc-shaped grooves, and the arc-shaped protrusions are in contact, and guarantees the expansion and grooving effects. Moreover, the reciprocating rotation manner for expansion and grooving can prevent the product from cracking, has better effects, and has more stable quality. The motor is installed on a separate frame or on the machine body.

[0056] Referring to Figure 8 As shown in the drawings, the utility model still provides an expansion and grooving device, including machine body, still install above machine body 4 above -mentioned expansion and grooving mechanism 41, be equipped with two groups of expansion and grooving mechanism 41 that mutually perpendicularly on machine body 4, a group of expansion and grooving mechanism 41 set up in machine body 4 top, another group of expansion and grooving mechanism 41 set up in the lateral wall of machine body 4. In this embodiment, the annular spacing of the expansion and grooving mechanism at the top of the machine body is arranged upward, which is suitable for short pipe expansion and grooving. The annular spacing of the expansion and grooving mechanism at the lateral wall of the machine body is arranged forward, which is suitable for long pipe expansion and grooving at the end.

[0057] Referring to Figure 8 As shown in the drawings, it also includes a conveying line 42, the end of the conveying line 42 is opposite to the machine body 4 or in contact with the lateral wall of the machine body 4, the conveying line 42 is provided with a product placement position, and the product placement position is opposite to the expansion and grooving mechanism 41 provided on the lateral wall of the machine body 4. The conveying line is a roller conveying line, which is used for supporting and conveying long pipes, so that the long pipes do not need to be manually supported during expansion and grooving, ensuring the stability and convenience of expansion and grooving and reducing the labor intensity of the operator.

[0058] In this way, the same device can process long pipes and short pipes, and the expansion and grooving are synchronized, which is more efficient and cost-effective.

[0059] In the description of the utility model, need understanding is, the term "upper", "lower", "top", "bottom", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise expressly specifically limited.

[0060] In the utility model, unless otherwise expressly provided and limited, the terms "mounting", "connection", "connection", "fixing" and so on should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, for example, two through abutment, contact and so on form mechanical abutment or contact connection mode, two also can be directly hung or through intermediate medium hang connection, also can be two element internal communication or two element interaction relationship. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A tube expansion and grooving mechanism, characterized in that: Includes a base plate, an expansion body mounted on the base plate, and a clamping body; The clamping body is coaxially disposed outside the expansion body; The clamping body includes multiple sets of clamping components arranged around the outside of the expansion body. Each clamping component includes a clamping block and a first hydraulic cylinder disposed outside the clamping block. The first hydraulic cylinder is configured to drive the clamping block closer to or away from the expansion body. Each clamping block has an arc-shaped groove on its inner wall, and multiple arc-shaped grooves form a first annular groove. The tightening body includes a pushing part, a tightening assembly sleeved on the upper outside of the pushing part, and a resetting member sleeved on the outer side of the tightening assembly. The tightening assembly includes multiple tightening blocks arranged around the upper outside of the pushing part. The lower outer surface of each tightening block is provided with an arc-shaped protrusion facing the arc-shaped groove. The multiple arc-shaped protrusions form a first annular protrusion facing the first annular groove. The resetting member is sleeved on the outer side of the multiple tightening blocks. The pushing part pushes the multiple tightening blocks away from the axis of the pushing part, and the resetting member pushes the tightening blocks closer to the axis of the pushing part.

2. The tube expansion and grooving mechanism according to claim 1, characterized in that: The upper outer surface or top surface of the expansion block is provided with an installation groove, and the installation grooves of multiple expansion blocks constitute a second annular installation groove. The reset component is sleeved in the second annular installation groove. And / or, the reset element is a spring ring or an elastic rubber ring.

3. The tube expansion and grooving mechanism according to claim 1, characterized in that: The base plate has a through hole, and the clamping assembly is coaxially disposed on the top surface of the base plate outside the through hole; the lower part of the expansion assembly is coaxially disposed inside the through hole, and the clamping assembly is disposed outside the expansion assembly.

4. The tube expansion and grooving mechanism according to claim 3, characterized in that: The pushing part includes a tapered push rod and a vertical driving member for driving the tapered push rod to move vertically; the center of the tensioning assembly is provided with a tapered hole that matches the tapered push rod, the upper part of the tapered push rod is inserted into the tapered hole, and the outer surface of the tapered push rod abuts against the inner wall of the tapered hole, and the outer diameter of the top of the tapered push rod is smaller than the outer diameter of the bottom of the tapered push rod; The top of the vertical drive component is connected to the bottom surface of the base plate via a bracket, and the bottom of the tapered push rod is connected to the drive end of the vertical drive component. A support plate is also provided, which is connected to the bracket. The bottom surface of the tensioning component abuts against the bottom surface of the support plate, and the bottom of the tensioning block is slidably disposed on the support plate. The support plate is provided with a clearance hole facing the tapered hole.

5. The tube expansion and grooving mechanism according to claim 4, characterized in that: The inner surface of each of the expansion blocks is an arc-shaped inclined surface that slopes outward from top to bottom, and multiple arc-shaped inclined surfaces constitute the conical hole.

6. The tube expansion and grooving mechanism according to claim 1, characterized in that: An annular limiting block is also provided, which is located above the clamping assembly, and the outer edge of the annular limiting block is connected to the base plate via multiple fixing plates.

7. The tube expansion and grooving mechanism according to claim 1, characterized in that: The base plate is also provided with an annular positioning block, which is disposed between the multiple clamping blocks and the first hydraulic cylinder; When the output shaft of the first hydraulic cylinder is retracted, the outer surface of the clamping block abuts against the inner surface of the annular positioning block; when the output shaft of the first hydraulic cylinder is extended, multiple clamping blocks form an annular structure, and the side walls of adjacent clamping blocks are in contact.

8. The tube expansion and grooving mechanism according to claim 1, characterized in that: The bottom surface of the base plate is provided with a sector-shaped rack coaxially arranged with the expansion body; a motor and a gear are also provided, the gear meshes with the sector-shaped rack, the motor is configured to drive the gear to rotate, and synchronously drive the base plate, the expansion body and the clamping body mounted on the base plate to rotate synchronously.

9. A tube expansion and grooving device, characterized in that: The device includes a body, on which an expansion tube grooving mechanism as described in any one of claims 1-8 is also installed. The body has two sets of mutually perpendicular expansion tube grooving mechanisms, one set of which is located on the top of the body and the other set is located on the side wall of the body.

10. The tube expansion and grooving device according to claim 9, characterized in that: It also includes a conveyor line, the end of which is in contact with the machine body or the side wall of the machine body. The conveyor line is provided with a product placement position, which is located opposite the expansion tube grooving mechanism provided on the side wall of the machine body.

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