Tension type feeding device for automatic short U ring forming integrated machine

Abstract

The utility model provides a kind of tension type feeding device for automatic forming integrated machine of short U collar without scrap, and the moving part of feed drive assembly is fixedly connected with the moving plate guided and installed on the bottom plate, and the clamp module component one for clamping pipe is installed on the moving plate, and moving plate and clamp module component one are driven by feed drive assembly to reciprocate along the length direction of bottom plate, and fixed frame is arranged on the right end plate surface of bottom plate, and clamp module component two for clamping pipe is installed on fixed frame.The utility model avoids the relaxation state of pipe in feeding cycle, fundamentally solves the problem of pipe jumping, backward displacement, ensures the accurate position of pipe feeding process, avoids the problem of poor short pipe fixed-length cutting precision caused by feeding deviation, provides basic guarantee for subsequent short U collar forming quality, simple structure, optimized structure is reasonable, structure connection relationship is clear, without complex additional structure, easy to install and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, specifically relating to a tensioning feeding device for an automatic forming integrated machine for chipless short U-shaped collars. Background Technology

[0002] Existing short U-shaped tubes require sequential processing at a cutting machine, flaring machine, bending machine, cleaning machine, and ring-forming machine, involving cutting, flaring, bending, cleaning, degreasing, and ring-forming. This process is cumbersome, inconvenient to operate, and labor-intensive. To address these technical issues, our company designed a cutting head and its superimposed short U-shaped bend ring automatic forming machine, patent number CN201510458729.8. In operation, this automatic short U-shaped bend ring forming machine uses a linear motor to drive the feeding mechanism, causing the feeding cylinder that clamps the tube to move along the feeding mechanism to the left guide rail, thus feeding the tube to the cutting head position. When the first round of cutting is completed and the next feeding process begins, the feeding cylinder releases the tube and moves it to the right along the guide rail to the initial position under the drive of the linear motor. The feeding cylinder then clamps the tube again, and the above process is repeated to continue feeding, completing the next feeding process. However, during this process, when the feeding cylinder releases the metal tube and moves it to the right to reset, the tube is in a relaxed state. Due to the relatively long length of the tube, it is prone to jumping and backward displacement when it is in a relaxed state, resulting in poor feeding stability and poor length accuracy of short tubes that need to be cut to a fixed length, which seriously affects the feeding accuracy. Therefore, it is necessary to improve the above-mentioned problems. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a tensioning feeding device for an automatic forming machine for chipless short U-shaped collars. This device consists of a movable clamping mold assembly driven by a feed drive component and a clamping mold assembly fixed on a fixed frame. These two components alternately clamp the pipe during feeding, preventing the pipe from becoming slack during the feeding cycle. This fundamentally solves the problems of pipe jumping and backward displacement, ensuring accurate positioning during pipe feeding and avoiding poor short pipe length cutting accuracy due to feeding deviations. This provides a fundamental guarantee for the subsequent forming quality of the short U-shaped collars. The device has a simple and optimized structure with clear structural connections, requiring no complex additional structures, and is easy to install and maintain.

[0004] The technical solution adopted in this utility model is as follows: a tension feeding device for an automatic forming integrated machine for chipless short U-shaped collars, including a feeding drive assembly rotatably supported on the feeding side plate of the right end of the base plate. The moving part of the feeding drive assembly is fixedly connected to a moving plate that is guided and installed on the base plate. A clamping mold assembly one for clamping the pipe is installed on the moving plate, and the feeding drive assembly drives the moving plate and the clamping mold assembly one to reciprocate along the length direction of the base plate. A fixed frame is provided on the right end plate of the base plate to the right of the feeding drive assembly, and a clamping mold assembly two for clamping the pipe is installed on the fixed frame. Stable feeding of the pipe is achieved by the alternating clamping cooperation of the clamping mold assembly two and the clamping mold assembly with a pair of pipes.

[0005] The feed drive assembly includes a motor and a lead screw arranged parallel to the length direction of the base plate. The two ends of the lead screw are rotatably supported on the upright plate of the base plate through bearing seats, and the nut seat adapted to the lead screw is fixedly connected to the moving plate. Under the drive of the motor, the nut seat drives the moving plate and the clamping mold assembly to reciprocate along the length direction of the base plate.

[0006] Furthermore, two fixed long plates symmetrically distributed on both sides of the feed drive assembly are fixed on the base plate surface, and the guide rail is installed on the upper surface of the fixed long plates. The bottom surfaces of both ends of the moving plate are fixedly connected to the sliders adapted to the guide rails on the same side.

[0007] Furthermore, the fixing frame is a slot-shaped frame with an opening facing downwards, spanning the right end of the two guide rails, and the lower ends of the multiple supports evenly distributed along the length of the fixing frame in the clamping mold assembly two are fixedly connected to the upper end surface of the fixing frame.

[0008] Furthermore, the clamping mold assembly two includes a plurality of slotted structure supports with downward-facing openings, a cylinder fixed to the upper end face of the supports, and fixed clamping molds and movable clamping molds distributed from bottom to top inside the supports. The upper end face of the fixed clamping mold and the lower end face of the movable clamping mold are both provided with corresponding arc-shaped clamping grooves of the same number. The fixed clamping mold is installed on the upper end face of the fixed frame, and the telescopic rod of the cylinder passes through the through hole on the support and is fixedly connected to the movable clamping mold. Under the lifting and lowering action of the movable clamping mold driven by the cylinder, the pipes located in the arc-shaped clamping grooves at the upper and lower corresponding positions are clamped or released.

[0009] Furthermore, the second clamping assembly has the same structure as the first clamping assembly.

[0010] Furthermore, the right end plate of the base plate is provided with a rounding and straightening device located on the right side of the fixing frame and used to straighten the pipe.

[0011] Furthermore, the calibration and straightening device includes a calibration frame, guide sleeves, a calibration wheel set, and a straightening wheel set. The lower end of the calibration frame is fixed to the base plate, and the right end of the multiple mounting vertical plates arranged parallel to the length of the base plate at the upper end of the calibration frame is fixed with a side plate in the center. The straightening wheel set and the calibration wheel set are installed on both sides of the mounting vertical plate. The side plate is symmetrically fixed with guide sleeves corresponding to the positions of the calibration wheel sets, which are used to guide the pipe through. The pipe passes through the guide sleeves and passes through the corresponding calibration wheel set and the straightening wheel set in sequence for calibration and straightening, respectively.

[0012] Furthermore, the calibrating wheel set includes two calibrating wheels with corresponding semi-circular grooves on their upper and lower wheel surfaces. The two calibrating wheels are rotatably mounted on the side wall of the mounting vertical plate so that the semi-circular grooves on them fit together to form a circular groove that is compatible with the pipe. The straightening wheel set includes three straightening wheels with corresponding arc-shaped grooves on their wheel surfaces, which are distributed in a triangle. The straightening wheels are rotatably mounted on the side wall of the mounting vertical plate and straighten the pipe that passes through them.

[0013] Furthermore, the guide sleeve includes a central equal-diameter sleeve, a large conical sleeve with a right-end diameter greater than the left-end diameter of the equal-diameter sleeve, and a small conical sleeve with a right-end diameter greater than the left-end diameter of the equal-diameter sleeve. The left end face of the small conical sleeve has a discharge hole that communicates with the interior of the guide sleeve and is used for the pipe to pass through.

[0014] Advantages of this utility model compared to the prior art: 1. This technical solution sets up a movable clamping mold assembly 1 driven by a feed drive assembly and a clamping mold assembly 2 fixed on a fixed frame. The two alternately clamp the tube for feeding, avoiding the tube from becoming loose during the feeding cycle. This fundamentally solves the problems of tube jumping and backward displacement, ensures accurate positioning of the tube during feeding, and avoids the problem of poor short tube length cutting accuracy caused by feeding deviation. This provides a basic guarantee for the quality of subsequent short U-shaped collar forming. 2. This technical solution, by setting a rounding and straightening device at the feeding position, can perform rounding and straightening treatment on the pipe in sequence, which can correct the morphological defects that may exist in the pipe, such as bending and non-roundness, so that the pipe maintains a regular cylindrical structure, providing a qualified raw material morphology basis for the stable clamping and accurate feeding of the subsequent clamping mold assembly, and avoiding the impact of material pipe morphology problems on feeding stability. 3. This technical solution has a simple structure, a reasonable optimized structure, and a clear structural connection relationship. It does not require complex additional structures, making it easy to install and maintain. It can reduce forming errors caused by deviations in the shape of the material tube itself, enhance the smoothness and stability of feeding, and has high application value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0016] The following will be based on the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] The tensioning feeding device for the automatic forming machine of chipless short U-shaped collars, such as... Figure 1As shown, the system includes a feed drive assembly 2 rotatably supported on the feed side plate of the right end of the base plate 1. The moving part of the feed drive assembly 2 is fixedly connected to a moving plate 3, which is guided and mounted on the base plate 1. A clamping mold assembly 4 for clamping the pipe is mounted on the moving plate 3, and the feed drive assembly 2 drives the moving plate 3 and the clamping mold assembly 4 to reciprocate along the length of the base plate 1. A fixing frame 5 is provided on the right end plate of the base plate 1, located to the right of the feed drive assembly 2. A clamping mold assembly 6 for clamping the pipe is mounted on the fixing frame 5. With the alternating clamping of the tube by the second clamping component 6 and the first clamping component 4, stable feeding of the tube is achieved. In the above structure, by setting the movable clamping component 4 driven by the feed drive component 2 and the second clamping component 6 fixed on the fixed frame 5, the two alternately clamp the tube for feeding, avoiding the tube from becoming loose in the feeding cycle, fundamentally solving the problem of tube jumping and backward displacement, ensuring accurate positioning of the tube during feeding, avoiding the problem of poor short tube length cutting accuracy caused by feeding deviation, and providing a basic guarantee for the subsequent short U-shaped ring forming quality. The specific structure of the feed drive assembly 2 is as follows: The feed drive assembly 2 includes a motor 2-1 and a lead screw 2-2 arranged parallel to the length direction of the base plate 1. The two ends of the lead screw 2-2 are rotatably supported on the upright plate 2-4 of the base plate 1 through bearing seats 2-3. The nut seat 2-5 adapted to the lead screw 2-2 is fixedly connected to the moving plate 3. Under the drive of the motor 2-1, the nut seat 2-5 drives the moving plate 3 and the clamping mold assembly 4 to reciprocate along the length direction of the base plate 1.

[0020] The guide installation structure of the movable plate 3 on the base plate 1 is as follows: two fixed long plates 7 are fixedly fixed on the surface of the base plate 1, which are symmetrically distributed on both sides of the feed drive assembly 2, and the guide rail 8 is installed on the upper surface of the fixed long plate 7. The bottom surfaces of both ends of the movable plate 3 are fixedly connected to the sliders 9 adapted to the guide rails 8 on the same side. Specifically, the fixed frame 5 is a slot-shaped frame with an opening facing downwards, which spans the right end of the two guide rails 8. The lower ends of the multiple brackets 6-1 evenly distributed along the length direction of the fixed frame 5 in the clamping assembly 2 6 are fixedly connected to the upper surface of the fixed frame 5.

[0021] The clamping mold assembly 2 6 and the clamping mold assembly 1 4 have the same structure; wherein, the specific structure of the clamping mold assembly 2 6 is as follows: the clamping mold assembly 2 6 includes a plurality of slotted structure brackets 6-1 with downward openings, a cylinder 6-2 fixed to the upper end face of the bracket 6-1, and fixed clamping molds 6-3 and movable clamping molds 6-4 distributed from bottom to top inside the bracket 6-1. The upper end face of the fixed clamping mold 6-3 and the lower end face of the movable clamping mold 6-4 are both provided with corresponding and equal number of arc-shaped clamping grooves 6-5. The fixed clamping mold 6-3 is installed on the upper end face of the fixed frame 5, and the telescopic rod of the cylinder 6-2 passes through the through hole on the bracket 6-1 and is fixedly connected to the movable clamping mold 6-4. Under the lifting and lowering action of the movable clamping mold 6-4 driven by the cylinder 6-2, the pipes located in the arc-shaped clamping grooves 6-5 at the upper and lower corresponding positions are clamped or released.

[0022] In order to improve the quality of the short U-ring sleeve and eliminate the bending deformation of the tube, a rounding and straightening device is provided on the right end plate of the base plate 1, located on the right side of the fixing frame 5, for straightening the tube.

[0023] The structure of the roundness and straightness calibration device is as follows: The roundness and straightness calibration device includes a calibration frame 10, a guide sleeve 11, a roundness calibration wheel set 12, and a straightness calibration wheel set 13. The lower end of the calibration frame 10 is fixed on the base plate 1, and the right end of the multiple mounting vertical plates 10-2 arranged parallel to the length direction of the base plate 1 at the upper end of the calibration frame 10 is fixed with a side plate 10-1 in the center. The straightness calibration wheel set 13 and the roundness calibration wheel set 12 are installed on both sides of the mounting vertical plates 10-2. The side plate 10-1 is symmetrically fixed with a guide sleeve 11 corresponding to the position of the roundness calibration wheel set 12, which is used to guide the pipe through. The pipe passes through the guide sleeve 11 and passes through the corresponding roundness calibration wheel set 12 and straightness calibration wheel set 13 in sequence for roundness calibration and straightness calibration, respectively.

[0024] The specific installation structure of the calibrating wheel assembly 12 and the straightening wheel assembly 13 is as follows: The calibrating wheel assembly 12 includes two calibrating wheels 12-1 with corresponding semi-circular grooves on their surfaces, distributed vertically. The two calibrating wheels 12-1 are rotatably mounted on the side wall of the mounting vertical plate 10-2 so that the semi-circular grooves on them align to form a circular groove that fits the pipe. The straightening wheel assembly 13 includes three straightening wheels 13-1 with corresponding arc-shaped grooves on their surfaces, distributed in a triangular pattern. The straightening wheels 13-1 are rotatably mounted on the side wall of the mounting vertical plate 10-2 and straighten the pipes passing through them. Specifically, the guide sleeve 11 includes a central equal-diameter sleeve. The guide sleeve 11 has a large conical sleeve with a right-end diameter greater than its left-end diameter and a small conical sleeve with a right-end diameter greater than its left-end diameter. The small conical sleeve has a discharge hole on its left end face that communicates with the inside of the guide sleeve 11 and is used for the pipe to pass through. Since the metal pipe is relatively long, it may jump during the feeding process due to unstable tension. Therefore, the guide sleeve 11 is designed with a large conical sleeve structure with a right-end diameter greater than its left-end diameter to provide a margin for pipe feeding. The circular discharge hole on the left end face of the guide sleeve 11 guides the pipe and ensures that its position corresponds to the alignment wheel set 12.

[0025] In this structure, by setting a rounding and straightening device at the feeding position, the pipe can be rounded and straightened in sequence. This can correct any morphological defects that may exist in the pipe, such as bending or non-roundness, so that the pipe maintains a regular cylindrical structure. This provides a qualified raw material shape basis for the stable clamping and precise feeding of the subsequent clamping mold assembly, and avoids the feeding stability being affected by the shape of the pipe.

[0026] The specific work process is as follows: 1) Preliminary preparation: Before the device is started, the pipe is pre-passed through the rounding and straightening device located on the right side of the fixed frame 5 at the right end of the base plate 1, and is initially positioned after being guided by the guide sleeve 11; at this time, the clamping mold assembly 2 6 fixed on the fixed frame 5 is started, and its cylinder 6-2 drives the movable clamping mold 6-4 to rise, so that the pipe passes through the arc-shaped clamping groove 6-5 and extends into the clamping mold assembly 1 4 located in the initial position; Alternating clamping and feeding cycle: Clamping mold assembly 4 on the moving plate 3 (with the same structure as clamping mold assembly 6) clamps the pipe synchronously; then the motor 2-1 of the feed drive assembly starts, driving the lead screw 2-2 to rotate. The nut seat 2-5 on the lead screw 2-2 drives the moving plate 3 to move to the left along the length of the guide rail 8, thereby causing clamping mold assembly 4 to carry the pipe a specified distance in the processing direction; after the material is fed into place, clamping mold assembly 6 starts, and its cylinder 6-2 drives the movable clamping mold 6-4 to descend, so that the movable clamping mold 6-4 and the fixed clamping mold 6-3 clamp the pipe. At this time, after the fixture in the cutting process clamps and cuts the pipe, clamping mold assembly 4 releases the pipe, and the moving plate 3 moves to the right and resets under the drive of the feed drive assembly 2. After the moving plate 3 returns to the initial position, clamping mold assembly 4 clamps the pipe again, and clamping mold assembly 6 releases the pipe. The above process is repeated to achieve stable and continuous conveying of the pipe. Pipe shape calibration: During the continuous conveying of the pipe, it will continuously pass through the roundness and straightness calibration device. First, it passes through the roundness calibration wheel group 12 (two roundness calibration wheels 12-1 with semi-circular grooves on the upper and lower parts to correct the roundness of the pipe), and then it passes through the straightness calibration wheel group 13 (three straightness calibration wheels 13-1 distributed in a triangle to correct the bending of the pipe). This ensures that the pipe shape is regular when it is conveyed to the subsequent processing stage and meets the processing accuracy requirements.

[0027] This technical solution has a simple and rationally optimized structure with clear structural connections. It requires no complex additional structures, making it easy to install and maintain. It can reduce forming errors caused by deviations in the shape of the material tube itself, enhance the smoothness and stability of feeding, and has high application value.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tensioning feeding device for an automatic forming machine for chipless short U-shaped collars, characterized in that: The system includes a feed drive assembly (2) that is rotatably supported on the feed side plate of the right end of the base plate (1). The moving part of the feed drive assembly (2) is fixedly connected to a moving plate (3) that is guided and installed on the base plate (1). A clamping mold assembly (4) for clamping the pipe is installed on the moving plate (3). The feed drive assembly (2) drives the moving plate (3) and the clamping mold assembly (4) to move back and forth along the length of the base plate (1). A fixed frame (5) located on the right side of the feed drive assembly (2) is provided on the right end plate of the base plate (1). A clamping mold assembly (6) for clamping the pipe is installed on the fixed frame (5). Stable feeding of the pipe is achieved by the clamping mold assembly (6) and the clamping mold assembly (4) alternately clamping the pipe.

2. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The feed drive assembly (2) includes a motor (2-1) and a lead screw (2-2) arranged parallel to the length direction of the base plate (1). The two ends of the lead screw (2-2) are rotatably supported on the upright plate (2-4) of the base plate (1) through bearing seats (2-3). The nut seat (2-5) adapted to the lead screw (2-2) is fixedly connected to the moving plate (3). Under the drive of the motor (2-1), the nut seat (2-5) drives the moving plate (3) and the clamping mold assembly (4) to reciprocate along the length direction of the base plate (1).

3. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: Two fixed long plates (7) are fixed on the base plate (1) and are symmetrically distributed on both sides of the feed drive assembly (2). The guide rail (8) is installed on the upper surface of the fixed long plate (7). The bottom surfaces of both ends of the moving plate (3) are fixedly connected to the sliders (9) adapted to the guide rails (8) on the same side.

4. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 3, characterized in that: The fixed frame (5) is a slotted frame with an opening facing downwards, spanning the right end of the two guide rails (8). The lower ends of the multiple brackets (6-1) evenly distributed along the length of the fixed frame (5) in the clamping assembly (6) are fixedly connected to the upper surface of the fixed frame (5).

5. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The clamping mold assembly 2 (6) includes a bracket (6-1) with multiple downward-facing slotted structures, a cylinder (6-2) fixed to the upper end face of the bracket (6-1), and fixed clamping molds (6-3) and movable clamping molds (6-4) distributed from bottom to top inside the bracket (6-1). The upper end face of the fixed clamping mold (6-3) and the lower end face of the movable clamping mold (6-4) are both provided with corresponding and identical arc-shaped clamping grooves (6-5). The fixed clamping mold (6-3) is installed on the upper end face of the fixed frame (5), and the telescopic rod of the cylinder (6-2) passes through the through hole on the bracket (6-1) and is fixedly connected to the movable clamping mold (6-4). Under the lifting and lowering action of the movable clamping mold (6-4) driven by the cylinder (6-2), the pipes located in the arc-shaped clamping grooves (6-5) at the upper and lower corresponding positions are clamped or released.

6. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The clamping assembly 2 (6) and clamping assembly 1 (4) have the same structure.

7. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The bottom plate (1) is provided with a straightening and rounding device located on the right side of the fixing frame (5) for straightening the pipe.

8. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 7, characterized in that: The calibration and straightening device includes a calibration frame (10), a guide sleeve (11), a calibration wheel set (12), and a straightening wheel set (13). The lower end of the calibration frame (10) is fixed on the base plate (1), and the right end of the multiple mounting vertical plates (10-2) arranged parallel to the length direction of the base plate (1) at the upper end of the calibration frame (10) is fixed with a side plate (10-1). The straightening wheel set (13) and the calibration wheel set (12) are installed on both sides of the mounting vertical plate (10-2). The side plate (10-1) is symmetrically fixed with a guide sleeve (11) corresponding to the position of the calibration wheel set (12) for the pipe to pass through and guide it. The pipe passes through the guide sleeve (11) and passes through the corresponding calibration wheel set (12) and the straightening wheel set (13) in sequence for calibration and straightening respectively.

9. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 8, characterized in that: The calibrating wheel assembly (12) includes two calibrating wheels (12-1) with corresponding semi-circular grooves on their upper and lower wheel surfaces. The two calibrating wheels (12-1) are rotatably mounted on the side wall of the mounting vertical plate (10-2) so that the semi-circular grooves on them fit together to form a circular groove that is compatible with the pipe. The straightening wheel assembly (13) includes three straightening wheels (13-1) with corresponding arc-shaped grooves on their wheel surfaces, which are distributed in a triangular pattern. The straightening wheels (13-1) are rotatably mounted on the side wall of the mounting vertical plate (10-2) and straighten the pipe that passes through them.

10. The tensioning feeding device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 8, characterized in that: The guide sleeve (11) includes a central equal-diameter sleeve, a large conical sleeve with a right end diameter greater than the left end diameter of the equal-diameter sleeve, and a small conical sleeve with a right end diameter greater than the left end diameter of the equal-diameter sleeve. The small conical sleeve has a discharge hole on its left end face that communicates with the inside of the guide sleeve (11) and is used for the pipe to pass through.

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