Pushing and positioning device for automatic short U ring forming integrated machine

Abstract

The utility model provides a kind of push material positioning device for automatic forming integrated machine of short U ring without scrap, push material plate and receiving plate are connected by the spacing adjustable connection of bottom push material driving device, and the moving part of adjusting device is fixedly connected with push material plate or receiving plate;Multiple receiving grooves are provided on the upper end surface of receiving plate, and the same number of feeding needles as receiving groove and corresponding position are installed on push material plate, push material driving device drives push material plate to drive feeding needle to push short material pipe into forming groove in bending process, and positioning needle in bending process is used to prevent short material pipe from slipping during straight section of short material pipe positioning;Multiple unloading driving devices are provided on push material plate, and the right end of unloading needle, which is arranged in the same number as receiving groove and corresponding position, is fixedly connected with unloading driving device in corresponding position.The utility model avoids the problem of length difference of straight section of short U ring caused by displacement, ensures that the size of two straight sections of short U ring is consistent, and improves the forming quality and processing efficiency of short U ring.

Description

Technical Field

[0001] This utility model belongs to the field of short U-ring processing technology, specifically relating to a pusher positioning device for an automatic forming integrated machine for chipless short U-rings. 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 (application number CN201510458729.8) and patent titled "Automatic Short U-Shaped Tube Ring Forming Machine with Overlapping Cutting Head and its Superimposed Type." This automatic short U-shaped tube ring forming machine uses a rotating motor 14 to drive the cutting head 11 to cut the tube material. The cutting head then pulls the tube apart... During the process, the flaring unit 2 shapes the short tube, which then falls into the bending unit 3. The shaped tube is pushed into the servo bending mechanism 35 by the pushing mechanism 32. The bending servo motor 34 drives the tube to bend it into a U-shape. Since there is no positioning structure at both ends of the short tube in the mold, the two ends of the short tube are prone to slippage during bending. For this type of short tube, even a small displacement will significantly affect the difference in the length of the straight segments, resulting in a quality defect in the short U-shaped collar with two straight segments of different lengths. Therefore, it is necessary to make improvements in order to solve the above problems. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a pusher positioning device for an automatic forming integrated machine for chipless short U-shaped collars. By setting up a feeding pin and a positioning pin in the bending process, the left end of the feeding pin is adapted and positioned within the straight segment to be formed on the right end of the short tube, and the positioning pin extends into the straight segment to be formed on the left end of the short tube. This double positioning structure effectively prevents the short tube from slipping during the bending process, avoiding the problem of length difference in the straight segments of the formed short U-shaped collar due to displacement, ensuring that the two straight segments of the short U-shaped collar are of consistent size, and improving the product qualification rate. The pusher driving device can drive... The pusher plate drives the feeding needle to automatically push the short tube to the forming groove of the bending process. The unloading drive device can drive the unloading needle to automatically push the bent short U-shaped collar out of the forming groove, reducing manual intervention and realizing the automated connection of short tube pushing, bending positioning, and finished product unloading, reducing labor intensity and improving processing efficiency. The pusher plate and receiving plate can be adjusted in distance through the bottom pusher drive device. The adjustment device can drive both to move to the left synchronously to the feeding position of the bending process. The distance and overall position of the pusher plate and receiving plate can be adjusted according to the different specifications of the short tube, adapting to the processing needs of short U-shaped collars of different sizes, with a wide range of applications.

[0004] The technical solution adopted in this utility model is as follows: a pusher positioning device for an automatic forming integrated machine for chipless short U-shaped collars, comprising a pusher plate guided and mounted on the equipment base plate and a receiving plate located on the left side of the pusher plate. The pusher plate and the receiving plate are connected as one unit with adjustable spacing via a pusher driving device at the bottom. An adjustment device is installed on the equipment base plate, and the moving part of the adjustment device is fixedly connected to the pusher plate or the receiving plate. Under the drive of the adjustment device, the pusher plate and the receiving plate move synchronously to the left to the feeding position of the bending process. The upper surface of the receiving plate is provided with multiple receiving grooves along its length for receiving short tubes from the previous process, and the pusher plate is equipped with the same number of receiving grooves and in the same position. The feeding needle, driven by the pushing device, moves the feeding plate to the left towards the receiving plate, so that the left end of the feeding needle is adapted and positioned within the straight section to be formed on the right end of the short tube and pushed into the forming groove in the bending process. During the bending process, the short tube is positioned against slippage by the feeding needle extending into the straight section on the right end and the positioning needle extending into the straight section on the left end in the bending process. The pushing plate is equipped with multiple unloading driving devices. The right end of the unloading needle, which is the same number as the receiving groove and is correspondingly positioned, is fixedly connected to the unloading driving device at the corresponding position. Under the drive of the unloading driving device, the left-moving unloading needle pushes the bent short U-shaped collar out of the forming groove.

[0005] The material pushing drive device includes two symmetrically arranged sensorless cylinders. The left end of the sensorless cylinder is fixedly connected to the bottom of the receiving plate, and the slider of the sensorless cylinder is fixedly connected to the pushing plate. Under the control of the sensorless cylinder, the pushing plate moves toward or away from the receiving plate.

[0006] Furthermore, the adjustment device includes a sensorless cylinder two fixed to the base plate of the equipment. The sensorless cylinder two is arranged perpendicular to the length direction of the push plate and the receiving plate, and the transition plate fixedly connected to the slider of the sensorless cylinder two is fixedly connected to the receiving plate or the push plate. Under the control of the sensorless cylinder two, the push plate and the receiving plate move to the left or right synchronously.

[0007] Furthermore, the unloading drive device includes multiple ultra-thin cylinders and an unloading push plate. Multiple mounting grooves are formed on the surface of the push plate, and the ultra-thin cylinders are located in the mounting grooves and are fixedly connected to the push plate. The unloading push plate has a T-shaped plate structure, and the lower end of the unloading push plate, which is adapted to the mounting groove guide, is fixedly connected to the piston rod of the ultra-thin cylinder. Two unloading needles are fixed on the upper left side wall of the unloading push plate. When the bent short U-shaped collar is unloaded, the left end of the unloading needle is driven by the ultra-thin cylinder to push the inner ring surface of the short U-shaped collar to the left and push it out of the forming groove.

[0008] Furthermore, two guide rails are symmetrically fixed on the base plate of the equipment, and two sliding blocks adapted to the guide rails are fixedly connected to the corresponding ends of the push plate and the receiving plate respectively through pads. Under the drive of the push drive device or the adjustment device, the push plate or the push plate and the receiving plate move along the length direction of the guide rails.

[0009] Furthermore, positioning plates are fixed on both sides of the receiving plate, located at the slots at both ends of the receiving groove. Both positioning plates are provided with upper and lower needle holes that are corresponding in position and distributed vertically. The lower needle hole corresponds to the position of the receiving groove, and the upper needle hole corresponds to the position of the inner ring of the bent short U-shaped collar. When the receiving plate is in the receiving position, the left ends of the unloading needle and the feeding needle are located in the lower and upper needle holes on the right positioning plate, respectively.

[0010] Furthermore, the feeding needle is a stepped round rod structure with a diameter at the left end smaller than that at the right end. When the short tube is bent, the feeding needle, which extends from the smaller diameter section into the straight section to be formed of the short tube and whose stepped surface at the left end contacts the right end of the short tube, provides anti-slip positioning for the straight section at the right end of the short tube.

[0011] Furthermore, the large-diameter section of the left end of the positioning pin is provided with external threads, and the left end of the positioning pin, which is coaxially arranged with the feeding pin, is threadedly fixed to the mounting plate of the bending process. The right end of the positioning pin has the same anti-slip positioning structure as the left end of the feeding pin.

[0012] Advantages of this utility model compared to the prior art: 1. This technical solution uses a combination of a feeding pin and a positioning pin in the bending process. The left end of the feeding pin is positioned within the straight section to be formed on the right end of the short tube, and the positioning pin extends into the straight section to be formed on the left end of the short tube. This double positioning structure effectively prevents the short tube from slipping during the bending process, avoids the problem of length difference in the straight section of the formed short U-shaped collar due to displacement, ensures that the two straight sections of the short U-shaped collar are of consistent size, and improves the product qualification rate. 2. The material pushing drive device of this technical solution can drive the material pushing plate to automatically push the short material tube to the forming groove of the bending process. The material unloading drive device can drive the material unloading needle to automatically push the bent short U-shaped collar out of the forming groove, reducing manual intervention and realizing the automated connection of short material tube pushing, bending positioning and finished product unloading, reducing labor intensity and improving processing efficiency. 3. In this technical solution, the distance between the pusher plate and the receiving plate is adjustable through the bottom pusher drive device. The adjustment device can drive both to move to the left synchronously to the feeding position of the bending process. The distance and overall position of the pusher plate and the receiving plate can be adjusted according to the different specifications of the short tube, which can adapt to the processing requirements of short U-shaped collars of different sizes and has a wide range of applications. 4. In this technical solution, the receiving plate receives the short tube from the previous process through the receiving groove, and the pushing plate is driven by the pushing drive device to push the short tube. The unloading structure completes the unloading of the finished product. All structures work together to make the feeding, positioning, bending and unloading process of the short U-ring processing smooth and orderly, reduce process interruption, improve the overall processing smoothness, and improve the forming quality and processing efficiency of the short U-ring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] The following will refer to 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.

[0015] 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.

[0016] 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.

[0017] Material pushing and positioning device for automatic forming integrated machine of chipless short U-shaped collars, such as Figure 1As shown, the device includes a pusher plate 1 mounted on the base plate of the equipment and a receiving plate 2 located to the left of the pusher plate 1. The pusher plate 1 and the receiving plate 2 are connected as a single unit through a bottom pusher drive device with adjustable spacing. An adjustment device is installed on the base plate of the equipment, and the moving part of the adjustment device is fixedly connected to the pusher plate 1 or the receiving plate 2. Under the drive of the adjustment device, the pusher plate 1 and the receiving plate 2 move to the left synchronously to the feeding position of the bending process. The upper end face of the receiving plate 2 is provided with multiple receiving grooves 3 along its length for receiving short tubes from the previous process. The positions of the receiving grooves 3 correspond to the positions of the forming grooves in the bending process. The pusher plate 1 is equipped with feeding needles 4 in the same number and corresponding positions as the receiving grooves 3. During the process of the pusher plate 1 being driven by the pusher device to move the feeder needle 4 to the left towards the receiving plate 2, the left end of the feeder needle 4 is fitted and positioned within the straight section to be formed on the right end of the short tube and pushed into the forming groove in the bending process. During the bending process, the short tube is positioned against slippage by the feeder needle 4 extending into the straight section on the right end and the positioning needle extending into the straight section on the left end in the bending process. The pusher plate 1 is equipped with multiple sets of unloading drive devices. The right end of the unloading needle 5, which is the same number as the receiving groove 3 and is positioned accordingly, is fixedly connected to the unloading drive device at the corresponding position. Under the drive of the unloading drive device, the unloading needle 5, which moves to the left (i.e. towards the bending process direction), pushes the bent short U-shaped collar out of the forming groove.

[0018] The specific structure of the pusher drive device is as follows: The pusher drive device includes two symmetrically arranged sensorless cylinders 6. The left end of the sensorless cylinder 6 is fixedly connected to the bottom of the receiving plate 2, and the slider of the sensorless cylinder 6 is fixedly connected to the pusher plate 1. Specifically, depending on the installation conditions, a pad can be set to be fixedly connected to the bottom of the receiving plate 2 and the pusher plate 1. Under the control of the sensorless cylinder 6, the pusher plate 1 moves toward or away from the receiving plate 2. The setting of the sensorless cylinder 6 provides conditions for adjusting the distance between the receiving plate 2 and the pusher plate 1. Thus, after the receiving plate 2 and the pusher plate 1 reach the unloading station of the bending process, the pusher plate 1 is controlled to move to the left, so that the feeding needle 4 and the unloading needle 5 move to the left synchronously. The feeding needle 4 pushes the short tube in the receiving groove 3 into the forming groove to complete the unloading action. The specific structure of the adjustment device is as follows: The adjustment device includes a sensorless cylinder 7 whose left end contacts the middle of the right end of the bending process and is fixed to the equipment base plate. The sensorless cylinder 7 is arranged perpendicular to the length direction of the push plate 1 and the receiving plate 2, and a transition plate 8 fixedly connected to the slider of the sensorless cylinder 7 is fixedly connected to the receiving plate 2 or the push plate 1. Figure 1 As shown, the right end plate of the transition plate 8 is fixedly connected to the slider of the sensorless cylinder 2 7, while the connecting plate of the left end plate of the transition plate 8, which is higher than the right end plate, is fixedly connected to the bottom of the receiving plate 2. Under the control of the sensorless cylinder 2 7, the pushing plate 1 and the receiving plate 2 move to the left or right synchronously.

[0019] The specific structure of the unloading drive device is as follows: The unloading drive device includes multiple ultra-thin cylinders 9 and an unloading push plate 10. Multiple mounting grooves are formed on the surface of the push plate 1, and the ultra-thin cylinders 9 are located in the mounting grooves and are fixedly connected to the push plate 1. The unloading push plate 10 has a T-shaped plate structure, and the lower end of the unloading push plate 10, which is adapted to the mounting groove, is fixedly connected to the piston rod of the ultra-thin cylinder 9. Two unloading needles 5 are fixed on the upper left side wall of the unloading push plate 10. When the bent short U-shaped collar is unloaded, the ultra-thin cylinder 9 drives the left end of the unloading needle 5 to push the inner ring surface of the short U-shaped collar to the left to push it out of the forming groove. When the piston rod of the ultra-thin cylinder 9 extends and retracts, the unloading push plate 10 cooperates with the mounting groove to achieve the guiding purpose, thereby improving the stability of the left and right movement of the unloading needle 5 and achieving precise unloading of the formed short U-shaped collar.

[0020] The pusher drive device can drive the pusher plate 1 to automatically push the short tube to the forming groove of the bending process, and the unloading drive device can drive the unloading needle 5 to automatically push the bent short U-shaped collar out of the forming groove, reducing manual intervention and realizing the automated connection of short tube pushing, bending positioning and finished product unloading, reducing labor intensity and improving processing efficiency; the pusher plate 1 and the receiving plate 2 can be adjusted in distance through the bottom pusher drive device, and the adjustment device can drive both to move to the left synchronously to the feeding position of the bending process. The distance and overall position of the pusher plate 1 and the receiving plate 2 can be adjusted according to the different specifications of the short tube, adapting to the processing needs of short U-shaped collars of different sizes, and has a wide range of applications; The guide installation structure of the pusher plate 1 and the receiving plate 2 on the equipment base plate is as follows: Two guide rails 11 are symmetrically fixed on the equipment base plate, and two sliding blocks 12 adapted to the guide rails 11 are fixedly connected to the corresponding ends of the pusher plate 1 and the receiving plate 2 respectively through pads 13. Under the drive of the pusher drive device or the adjustment device, the pusher plate 1 or the pusher plate 1 and the receiving plate 2 move along the length direction of the guide rails 11.

[0021] The receiving structure of the receiving plate 2 and its connection structure with the unloading needle 5 and the feeding needle 4 are as follows: Positioning plates 14 are fixed on both sides of the upper surface of the receiving plate 2, located at the openings at both ends of the receiving groove 3. Each of the two positioning plates 14 has corresponding upper needle holes 15 and lower needle holes 16 distributed vertically. The lower needle holes 16 correspond to the receiving groove 3, and the upper needle holes 15 correspond to the inner ring of the bent short U-shaped collar. When the receiving plate 2 is in the receiving position, the left ends of the unloading needle 5 and the feeding needle 4 are located in the lower needle holes 16 and upper needle holes 15 on the right positioning plate 14, respectively. This structure, with the cooperation of the feeding needle 4 and the lower needle hole 16, provides conditions for the short tube falling into the receiving groove 3 to automatically move out of the receiving groove 3, and with the cooperation of the unloading needle 5 and the upper needle hole 15, provides conditions for the automatic unloading of the formed short U-shaped collar.

[0022] The specific structure for anti-slip positioning of the straight sections at both ends of the short tube is as follows: The feeding needle 4 is a stepped round rod structure with a left end diameter smaller than the right end diameter. When the short tube is bent, the feeding needle 4, with its smaller diameter section extending into the straight section to be formed and the stepped surface formed at the left end contacting the right end of the short tube, provides anti-slip positioning for the straight section at the right end of the short tube. Specifically, the larger diameter section at the left end of the positioning needle has an external thread, and the left end of the positioning needle, coaxially arranged with the feeding needle, is threadedly fixed to the mounting plate of the bending process. The anti-slip positioning structure of the right end of the positioning pin is the same as that of the left end of the feeding pin 4. In the above structure, by setting the feeding pin 4 to cooperate with the positioning pin in the bending process, the left end of the feeding pin 4 is adapted to be positioned in the straight section to be formed on the right end of the short tube, and the positioning pin extends into the straight section to be formed on the left end of the short tube. The double positioning structure can effectively prevent the short tube from slipping during the bending process, avoid the problem of the difference in length of the straight section of the formed short U-shaped collar due to displacement, ensure that the two straight sections of the short U-shaped collar are consistent in size, and improve the product qualification rate.

[0023] In this technical solution, the receiving plate 2 receives the short tube from the previous process through the receiving groove 3, and the pushing plate 1 is driven by the pushing drive device to push the short tube in the receiving groove 3. The unloading structure completes the unloading of the finished product. All structures work together to make the feeding, positioning, bending and unloading process of the short U-ring processing smooth and orderly, reduce process interruption, improve the overall processing smoothness, and improve the forming quality and processing efficiency of the short U-ring.

[0024] 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.

[0025] 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 pusher and positioning device for an automatic forming integrated machine for chipless short U-shaped collars, characterized in that: The equipment includes a pusher plate (1) mounted on the bottom plate of the equipment and a receiving plate (2) located to the left of the pusher plate (1). The pusher plate (1) and the receiving plate (2) are connected as one unit by a pusher drive device at the bottom. An adjustment device is installed on the bottom plate of the equipment, and the moving part of the adjustment device is fixedly connected to the pusher plate (1) or the receiving plate (2). Under the drive of the adjustment device, the pusher plate (1) and the receiving plate (2) move to the left synchronously to the feeding position of the bending process. The upper end face of the receiving plate (2) is provided with a plurality of receiving grooves (3) for receiving short tubes from the previous process along its length direction. The pusher plate (1) is equipped with feeding needles (4) of the same number and corresponding position as the receiving grooves (3). During the process of the material driving device driving the pusher plate (1) to move the feeding needle (4) to the left towards the receiving plate (2), the left end of the feeding needle (4) is adapted to be positioned in the straight section to be formed on the right end of the short tube and pushed into the forming groove in the bending process. During the bending process, the short tube is positioned by the feeding needle (4) extending into the straight section on the right end and the positioning needle extending into the straight section on the left end in the bending process to prevent slippage. The pusher plate (1) is equipped with multiple sets of unloading driving devices. The right end of the unloading needle (5) is fixedly connected to the unloading driving device at the corresponding position, and under the drive of the unloading driving device, the left-moving unloading needle (5) pushes the bent short U-shaped collar out of the forming groove.

2. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The pusher drive device includes two symmetrically arranged sensorless cylinders (6). The left end of the sensorless cylinder (6) is fixedly connected to the bottom of the receiving plate (2), and the slider of the sensorless cylinder (6) is fixedly connected to the pusher plate (1). Under the control of the sensorless cylinder (6), the pusher plate (1) moves toward or away from the receiving plate (2).

3. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The adjustment device includes a sensorless cylinder two (7) fixed on the base plate of the equipment. The sensorless cylinder two (7) is arranged perpendicular to the length direction of the push plate (1) and the receiving plate (2). The transition plate (8) fixedly connected to the slider of the sensorless cylinder two (7) is fixedly connected to the receiving plate (2) or the push plate (1). Under the control of the sensorless cylinder two (7), the push plate (1) and the receiving plate (2) move to the left or right synchronously.

4. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The unloading drive device includes multiple ultra-thin cylinders (9) and an unloading push plate (10). Multiple mounting slots are formed on the surface of the push plate (1), and the ultra-thin cylinders (9) are located in the mounting slots and are fixedly connected to the push plate (1). The unloading push plate (10) has a T-shaped plate structure, and the lower end of the unloading push plate (10) is adapted to the mounting slot guide and is fixedly connected to the piston rod of the ultra-thin cylinder (9). Two unloading needles (5) are fixed on the upper left side wall of the unloading push plate (10). When the bent short U-shaped collar is unloaded, the ultra-thin cylinder (9) drives the left end of the unloading needle (5) to push the inner ring surface of the short U-shaped collar to the left to push it out of the forming slot.

5. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: Two guide rails (11) are symmetrically fixed on the base plate of the equipment, and two sliding blocks (12) adapted to the guide rails (11) are fixedly connected to the corresponding ends of the push plate (1) and the receiving plate (2) respectively through the pad (13). Under the drive of the push drive device or the adjustment device, the push plate (1) or the push plate (1) and the receiving plate (2) move along the length direction of the guide rail (11).

6. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The receiving plate (2) has positioning plates (14) fixed on both sides of the upper plate surface, which are located at the slots at both ends of the receiving groove (3). The two positioning plates (14) are provided with upper needle holes (15) and lower needle holes (16) that are corresponding in position and distributed vertically. The lower needle hole (16) corresponds to the position of the receiving groove (3), and the upper needle hole (15) corresponds to the position of the inner ring of the bent short U-shaped collar. When the receiving plate (2) is in the receiving position, the left ends of the unloading needle (5) and the feeding needle (4) are located in the lower needle hole (16) and the upper needle hole (15) on the right positioning plate (14), respectively.

7. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 6, characterized in that: The feeding needle (4) is a stepped round rod structure with a diameter at the left end smaller than that at the right end. When the short tube is bent, the feeding needle (4) extends from the smaller diameter section into the straight section to be formed in the short tube and the stepped surface formed at the left end contacts the right end of the short tube to prevent slipping and positioning the straight section at the right end of the short tube.

8. The pusher and positioning device for the automatic forming integrated machine for chipless short U-shaped collars according to claim 1, characterized in that: The large diameter section of the left end of the positioning pin is threaded externally, and the left end of the positioning pin is threadedly fixed to the mounting plate of the bending process, which is coaxial with the feeding pin. The right end of the positioning pin has the same anti-slip positioning structure as the left end of the feeding pin (4).

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