Automatic elbow feeding device and feeding method

Abstract

This invention discloses an automatic elbow feeding device and method, comprising a lifting mechanism, a feeding mechanism, a hoisting mechanism, a transfer mechanism, and a pushing mechanism. The lifting mechanism feeds the elbow into the feeding mechanism, which then transports the elbow to the hoisting mechanism. The transfer mechanism adjusts the elbow's posture on the hoisting mechanism, and the pushing mechanism feeds the elbow into the infeed slide of the processing device. The hoisting mechanism includes a positioning block and a pushing mechanism. The positioning block is located at the rear end of the feeding mechanism, receiving the elbow fed by the feeding mechanism and moving up and down driven by the pushing mechanism. The transfer mechanism includes a rotary cylinder and a finger cylinder, with the finger cylinder connected to the output end of the rotary cylinder. The pushing mechanism and the infeed slide of the processing device are positioned opposite each other on both sides of the positioning block. The positioning block moves up and down between the finger clamping position of the finger cylinder, the infeed slide position, and the rear end of the feeding mechanism, driven by the pushing mechanism. This device improves efficiency.

Description

Technical Field

[0001] This invention relates to a feeding device and method, and more particularly to an automatic elbow feeding device and method. Background Technology

[0002] Elbows are commonly used pipe fittings for connecting pipes at bends, changing the direction of the pipeline. With the widespread application of fluid pipelines in various fields, elbows are among the most frequently used basic pipe fittings. Improving elbow production efficiency has become a key research focus for relevant technical personnel.

[0003] Because elbows are irregularly shaped, the current common method for feeding them is still manual labor. While this method is flexible, it has extremely low processing efficiency and poses certain safety hazards. Some technicians have proposed using vibratory feeders and robotic arms to replace manual labor. While vibratory feeders can feed a large number of elbows simultaneously, the vibration caused by the feeder can damage the elbow's shape, reducing the yield rate. Although robotic arms can solve the safety hazard problem, they still cannot address how to adjust the elbows. Furthermore, conventional robotic arms are expensive, hindering widespread adoption. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic elbow feeding device with controllable feeding posture; the present invention also provides an automatic elbow feeding method.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: it includes a lifting mechanism, a feeding mechanism, a hoisting mechanism, a transfer mechanism, and a pushing mechanism; the lifting mechanism feeds the elbow into the feeding mechanism, the feeding mechanism transports the elbow to the hoisting mechanism, the transfer mechanism adjusts the posture of the elbow on the hoisting mechanism, and the pushing mechanism feeds the elbow into the infeed slide of the processing device; the hoisting mechanism includes a positioning block and a pushing mechanism; the positioning block is located at the rear end of the feeding mechanism, receives the elbow transported by the feeding mechanism, and is driven to move up and down by the pushing mechanism; the transfer mechanism includes a rotary cylinder and a finger cylinder, the finger cylinder being connected to the output end of the rotary cylinder; the pushing mechanism and the infeed slide of the processing device are arranged opposite to each other on both sides of the positioning block; the positioning block moves up and down between the finger clamping position of the finger cylinder, the infeed slide position, and the rear end of the feeding mechanism under the drive of the pushing mechanism.

[0006] The pusher mechanism of the present invention includes a pusher guide rail, a synchronous guide plate, a pusher support plate, and a power mechanism; the pusher guide rail is vertically arranged and located below the positioning support block, the synchronous guide plate is slidably connected to the pusher guide rail and is driven to slide up and down by the power mechanism; the two ends of the pusher support plate are respectively connected to the positioning support block and the synchronous guide plate.

[0007] The power mechanism of the present invention includes a synchronous motor, a synchronous pulley, and a synchronous belt; the synchronous pulley is disposed below the synchronous motor, and the synchronous motor and the synchronous pulley are connected by a synchronous belt drive; the synchronous guide plate is fixedly connected to the synchronous belt.

[0008] The lifting mechanism of the present invention includes a lifting hopper, a baffle cylinder, and a baffle plate; the lifting hopper is slidably arranged up and down, and the bottom of the lifting hopper is inclined downward towards its discharge port; the feeding mechanism includes a feeding track, which is arranged in front of the discharge port of the lifting hopper; the baffle plate is positioned between the lifted hopper and the feeding track after it is raised; the output end of the baffle cylinder is connected to the baffle plate and drives the baffle plate to move up and down.

[0009] The upper part of the front end of the feeding track of the present invention is provided with a sliding baffle; the upper end of the sliding baffle corresponds to the discharge port of the lifting hopper after it is raised, and the lower end of the sliding baffle is directly opposite the feeding track.

[0010] The present invention provides a screening pusher above the material sliding baffle; the screening pusher and the material sliding baffle allow the elbow to pass through in a flat position and restrict the elbow to pass through in an upright position.

[0011] The feeding mechanism of the present invention is equipped with an attitude sensor at the conveying end; the attitude sensor determines the attitude of the bend and controls the rising position of the positioning block and whether the transfer mechanism is working.

[0012] The method of the present invention uses the above-mentioned feeding device, and the method steps are as follows: 1) The lifting mechanism feeds the elbow into the feeding mechanism, and the feeding mechanism transports the elbow to its conveying end;

[0013] 2) The feeding mechanism (7) conveys the elbow at the end of the material into the positioning block; the feeding mechanism stops working, and the pushing mechanism drives the positioning block to rise;

[0014] 3) When the elbow posture does not conform to the loading posture of the processing device: the push block mechanism drives the elbow on the positioning support block to rise to the gripping position of the finger cylinder; the gripping finger of the finger cylinder grips the elbow on the positioning support block; after the finger cylinder grips the elbow, the rotary cylinder drives the elbow to rotate to conform to the loading posture, and then the push block mechanism drives the elbow on the positioning support block to descend to the infeed slide position.

[0015] 4) When the elbow posture matches the loading posture of the processing device: the push block mechanism drives the elbow on the positioning block to rise to the position of the infeed slide;

[0016] 5) The pushing mechanism pushes the elbow in step 4) or 5) and pushes the elbow into the inlet slide of the processing device;

[0017] 6) The positioning block descends to the conveying end facing the feeding mechanism under the drive of the pushing mechanism; the feeding mechanism begins to work.

[0018] In step 1) of the method of the present invention, the attitude sensor at the end of the feeding mechanism determines the attitude of the bend.

[0019] The beneficial effects of adopting the above technical solution are as follows: This invention, through the cooperation of a positioning support block and a pushing block mechanism, delivers the elbow conveyed by the feeding mechanism to the transfer mechanism; using a rotary cylinder and a finger cylinder, the elbow is adjusted to an infeed posture, thereby feeding the elbow into the processing equipment of the processing device in a qualified posture, thus achieving fast, efficient, and qualified feeding. This invention features fast feeding speed, high efficiency, and qualified feeding posture, effectively saving labor and improving feeding and processing efficiency.

[0020] This invention employs a structure where the feeding track and the lifting hopper are positioned opposite each other. The elbow of the lifting hopper falls into the feeding track under gravity, thus feeding the track. The invention also incorporates a baffle plate and a baffle cylinder to feed the track as needed, preventing the elbow in the lifting hopper from falling into the track or falling out entirely at once, thereby effectively controlling the feeding process. This invention features fast feeding speed, high efficiency, and is characterized by automation and high efficiency. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0024] Figure 3 This is a three-dimensional structural schematic diagram of the lifting mechanism described in this invention;

[0025] Figure 4 This is a three-dimensional structural schematic diagram of the lifting mechanism described in this invention from another perspective;

[0026] Figure 5 This is a three-dimensional structural diagram of the feeding mechanism and lifting mechanism described in this invention;

[0027] Figure 6 This is a three-dimensional structural schematic diagram of the feeding mechanism and lifting mechanism described in this invention from another perspective;

[0028] Figure 7 This is a three-dimensional structural diagram of the transfer mechanism and the pusher mechanism described in this invention;

[0029] Figure 8 This is a three-dimensional structural schematic diagram of the transfer mechanism and the pusher mechanism described in this invention from another perspective;

[0030] Figure 9 This is a three-dimensional structural diagram of the positioning block in the lifting mechanism described in this invention.

[0031] In the diagram: Lifting mechanism 1, lifting hopper 11, lifting cylinder 12, lifting slide 13, lifting slider 14, fixed frame 15, screening cylinder 16, blocking cylinder 17, blocking plate 18, sliding baffle 19, baffle bar 110, screening push plate 111; Pushing mechanism 2, pushing cylinder 21, pushing plate 22; Transfer mechanism 3, finger cylinder 31, rotating cylinder 32, finger clamp 33; Elbow 4; Infeed slide 5; Frame 6; Feeding mechanism 7, vibrating feeder 71, feeding track 72; Lifting mechanism 8, push block guide rail 81, synchronous pulley 82, anti-drop baffle 83, push block support plate 84, synchronous guide plate 85, synchronous belt 86, synchronous motor 87, push block slider 88, positioning support block 89, vertical groove 810, front end face 811, rear end face 812. Detailed Implementation

[0032] This automatic elbow feeding device includes a lifting mechanism 1, a feeding mechanism 7, a lifting mechanism 8, a transfer mechanism 3, and a pushing mechanism 2. The lifting mechanism 1 feeds the elbow into the feeding mechanism 7, the feeding mechanism 7 transports the elbow to the lifting mechanism, the transfer mechanism 3 adjusts the elbow's posture on the lifting mechanism 8, and the pushing mechanism 2 feeds the elbow into the infeed slide 5 of the processing device. The lifting mechanism 1, feeding mechanism 7, lifting mechanism 8, transfer mechanism 3, and pushing mechanism 2 are all mounted on a frame 6, which is a vertically arranged plate structure.

[0033] The lifting mechanism 1 of this automatic elbow feeding device includes a lifting hopper 11, a baffle cylinder 17, and a baffle plate 18. A vertical lifting slide 13 is provided at the front end of one vertical side of the frame 6. A lifting slider 14 is connected to the lifting slide 13, and the lifting hopper 11 is fixed to the lifting slider 14, thus allowing the lifting hopper 11 to slide up and down on the front end of this vertical side of the frame 6. The lower end of the lifting hopper 11 is connected to the output end of the lifting cylinder 12, allowing the lifting cylinder 12 to drive the lifting hopper 11 to slide up and down. The lifting hopper 11 has a bucket-shaped structure, with the discharge port facing the frame 6. The bottom surface of the lifting hopper 11 is inclined downwards towards the discharge port. This allows the elbows inside the lifting hopper 11 to slide down to the discharge port under gravity, and because the frame 6 can block the discharge port, it prevents the elbows inside the lifting hopper 11 from falling off during the lifting process. When the lifting hopper 11 reaches its highest point, the lower edge of the discharge port of the lifting hopper 11 is flush with the upper end of the frame 6. The feeding mechanism 7 includes a feeding track 72 and a vibrating feeder 71. The feeding track 72 is located on another vertical side of the frame 6. A sliding baffle 19 is provided on the frame above the feeding track 72. The sliding baffle 19 is inclined, with its upper end facing the upper end of the frame 6 and its lower end facing the feeding track 72. The sliding baffle 19 includes an inclined base plate and baffles on both sides of the base plate. The baffles are used to prevent the elbow 4 from falling from both sides. With the above structure, when the lifting hopper 11 reaches its highest point, the inclined bottom surface of the lifting hopper 11 and the inclined bottom plate of the sliding baffle 19 form a slide inclined towards the feeding track 72. The elbow 4 can then slide down under the action of gravity and fall onto the feeding track 72 along this slide. If there is a gap between the lifting hopper 11 and the sliding baffle 19, a baffle 110 can be installed above the frame 6. The baffle 110 is located between the gap and is inclined, with its upper end corresponding to the lower end of the discharge port of the lifting hopper 11 after it is raised and its lower end corresponding to the upper part of the sliding baffle 19. In this way, the baffle 110 can be connected between the lifting hopper 11 and the sliding baffle 19.

[0034] The baffle plate 18 of the lifting mechanism 1 of this automatic elbow feeding device is located above the sliding baffle plate 19 and can completely block the sliding baffle plate 19; the baffle cylinder 17 is fixed on the frame 6 by the fixing frame 15, and the output end of the baffle cylinder 17 is connected downward to the baffle plate 18; in this way, when the baffle cylinder 17 drives the baffle plate 18 to rise, the baffle plate 18 no longer blocks the sliding baffle plate 19, and the elbow can slide along the sliding baffle plate 19 onto the feeding track 72; when the baffle cylinder 17 drives the baffle plate 18 to fall, the baffle plate 18 blocks the sliding baffle plate 19, the elbow is blocked and will not slide down onto the feeding track 72.

[0035] The automatic elbow feeding device has a screening pusher 111 and a screening cylinder 16 above the sliding baffle 19. The screening pusher 111 is a horizontally arranged long plate structure. The output end of the screening cylinder 16 is connected to the screening pusher 111 and can push it to move horizontally towards the lifting hopper 11 or the feeding track 72. The height of the screening pusher 111 is not lower than the highest end of the bottom plate of the sliding baffle 19 and not higher than the height of the highest end of the bottom plate of the sliding baffle 19 plus the elbow diameter. This height design, combined with the adjustment of the position of the screening pusher 111 by the pushing and pulling of the screening cylinder 16, allows the elbow to pass through in a flat position and restricts the elbow from passing through in an upright position. With the above structure, the screening pusher 111 only allows the elbows 4 in a flat position to fall into the feeding track. The elbows 4 with unqualified posture and those that are piled up are blocked by the screening pusher 111. Under the push of the screening cylinder 16, the elbows with unqualified posture and those that are piled up can be pushed back into the lifting hopper 11.

[0036] The feeding mechanism 7 of this automatic elbow feeding device has a feeding track 72 that extends horizontally from the front end of the frame 6 to the rear end of the frame. The vibrating feeder 71 is located below the feeding track 72. Thus, the feeding track 72, under the action of the vibrating feeder 71, can deliver the elbow to the rear end of the feeding track 72. The feeding track 72 is a long, grooved structure, with the groove width matching the pipe diameter of the elbow 4. This allows the elbow 4 to be fed within the feeding track 72 with its opening facing upwards or downwards. An attitude sensor, preferably a photoelectric switch, is located at the end of the feeding track 72. When the opening of the elbow at the very end of the feeding track 72 is upwards, the attitude sensor is directly facing the lower part of the pipe body of the elbow. When the opening of the elbow at the very end of the feeding track 72 is downwards, the attitude sensor is directly facing the inner space of the elbow, not directly facing the pipe body. This allows the sensor's triggering status to determine whether the elbow's opening is upwards or downwards.

[0037] The lifting mechanism 8 of this automatic elbow feeding device includes a positioning block 89 and a pushing mechanism. The positioning block 89 is located at the rear end of the feeding track 72. The positioning block 89 has a groove on the upper part of a block-shaped body, and the groove runs through the block perpendicular to the feeding direction of the feeding track. Along the feeding direction of the feeding track, the front end face 811 of the groove is inclined downward and backward, and the rear end face 812 is inclined downward and forward. The distance between the front end face and the rear end face of the top of the groove is greater than the closest distance between the two pipe openings of the elbow, forming a ︺-shaped structure. Since the elbows on the feeding track 7 are in an upward or downward orientation, elbows 4 in these two orientations can fall into the groove and be supported by the groove when they enter the positioning block 89. Along the conveying direction of the feeding track, downward vertical grooves 810 are opened at the middle position of the upper part of the block at the front and rear ends of the tray. Since the elbow 4 is a round pipe, after the vertical grooves 810 are opened, a part of the outer diameter of the part of the elbow 4 in contact with it can fall into the vertical grooves 810, thereby improving the stability of the elbow 4 in the tray. The lower part of the positioning block 89 is provided with a vertical anti-drop baffle 83 at one end near the feeding track 72. The anti-drop baffle 73 can block the elbow at the rear end of the feeding track 72 after the positioning block 89 is pushed up, preventing the elbow at the rear end of the feeding track 72 from falling off.

[0038] The automatic elbow feeding device includes a pusher block mechanism comprising a pusher block guide rail 81, a pusher block support plate 84, and a power mechanism. The pusher block guide rail 81 is vertically mounted on the frame 6 below the positioning support block 89. The power mechanism includes a synchronous motor 87, a synchronous pulley 82, a synchronous belt 86, and a synchronous guide plate 85. The synchronous motor 87 is fixedly connected to the frame 6, and the synchronous pulley 82 is rotatably connected to the frame below the synchronous motor 87 via a connecting shaft. The synchronous motor 87 and the synchronous pulley 82 are connected by the synchronous belt 86. The synchronous guide plate 85 is fixedly mounted on the synchronous belt 86 and slidably connected to the pusher block guide rail 81 via a pusher block slider 88. The pusher block support plate 84 is vertically mounted, with its upper end fixedly connected to the lower end of the positioning support block 89 and its lower end fixedly connected to the synchronous guide plate 85. In this way, as the synchronous motor 87 rotates, it drives the synchronous belt 86 to rotate between the synchronous motor and the synchronous pulley. The synchronous guide plate 85, which is fixed to the synchronous belt 86, can move up or down under the drive of the synchronous belt and slide up and down on the push block guide rail 81. The up and down moving synchronous guide plate 85 drives the push block support plate 84 to move up or down. The up or down moving push block support plate 84 drives the positioning support block 89 to move up and down, thereby driving the elbow 4 on the positioning support block 89 to move up and down.

[0039] The automatic elbow feeding device includes a rotating cylinder 32 and a finger cylinder 31 in its transfer mechanism. The rotating cylinder 32 is fixed to the upper part of the frame at the rear end of the positioning block 89. The output end of the rotating cylinder 32 extends towards the positioning block 89 and connects to the finger cylinder 31. After the positioning block 89 is raised, the elbow it receives is located between the fingers 33 of the finger cylinder 31. After the positioning block 89 is lowered, its upper end is flush with the bottom of the groove of the feeding track 72. In this way, the positioning block 89 can receive the elbow conveyed by the feeding track 72 and lift it upwards between the fingers 33 of the finger cylinder for easy gripping by the finger cylinder 31.

[0040] The automatic elbow feeding device includes a pushing structure comprising a pushing cylinder 21 and a pushing plate 22. The pushing cylinder 21 is fixed to the upper part of the frame, with its output end extending towards the infeed slide 5. The pushing plate 22 is fixed to the output end of the pushing cylinder 21. The pushing plate 22 and the infeed slide 5 are arranged opposite each other and on either side of the positioning support block 89. The height of the pushing plate 22 and the infeed slide 5 is lower than the gripper 33 of the finger cylinder and higher than or flush with the feeding track 72. Thus, the pushing cylinder 21 drives the pushing plate 22 to push the elbow 4 on the positioning support block towards the infeed slide 5 of the processing device, thereby pushing the elbow onto the infeed slide 5 and feeding it into the processing device.

[0041] The steps of this automatic feeding method for elbows are as follows: (1) The lifting hopper 11 descends to the lower part of the frame to receive the feed from the previous process.

[0042] (2) Driven by the lifting cylinder 12, the lifting hopper 11 moves upward on the frame and drives the elbow inside it to move upward until the inclined bottom of the lifting hopper 11 is flush with the upper end of the frame. At this time, since the bottom surface of the lifting hopper 11 is inclined, the elbow will slide down to the position of the frame, be blocked by the baffle plate 18 and pile up together.

[0043] (3) The baffle cylinder 17 drives the baffle plate 18 to rise, forming a channel below the baffle plate 17 that allows bends to pass through. Some bends will then pass through this channel into the sliding baffle plate 19 and slide down to the front end of the feeding track 72. Due to the width limitation of the feeding track 72 and the posture adjustment during the sliding process, the bends 4 on the feeding track 72 can only fall into the feeding track with their openings facing upwards or downwards. By controlling the baffle cylinder 17 to raise or lower the baffle plate 18, the feeding speed to the feeding track 72 can be controlled. When the feeding track 72 is full of bends, feeding stops. During the sliding process of the bends 4, the screening pusher 111, pushed by the screening cylinder 16, pushes the bends 4 with unqualified postures and those that are piled up back into the lifting hopper 11.

[0044] (4) Under the action of the vibrating feeder 71, the elbow 4 on the feeding track 72 is fed into the rear end of the conveyor; the attitude sensor determines whether the elbow 4 is in the attitude of the pipe opening downward or upward.

[0045] (5) The elbow 4 at the end of the conveying on the feeding track 72 enters the positioning block 89 and is supported by the positioning block 89; the vibrating feeder 71 stops working and the feeding track 72 stops feeding; the synchronous motor 87 rotates and the synchronous belt 86 drives the positioning block 89 and the elbow to move upward. According to the attitude sensor in step (4) to determine the attitude of the elbow, the following steps (6) or (7) are performed.

[0046] (6) When the elbow posture does not conform to the loading posture of the processing device: the synchronous motor 87 drives the elbow on the positioning support block 89 to rise to the gripper 33 position of the finger cylinder; the gripper 33 of the finger cylinder grips the elbow on the positioning support block 89; after the finger cylinder 31 grips the elbow, the rotary cylinder 32 rotates the elbow 180°, thereby turning it to conform to the loading posture; then the synchronous motor 87 drives the elbow on the positioning support block 89 to descend to the position of the insert slide 5.

[0047] (7) When the elbow posture matches the loading posture of the processing device: the synchronous motor 87 drives the elbow on the positioning block 89 to rise to the position of the infeed slide 5.

[0048] (8) The pusher cylinder 21 drives the pusher plate 22 to push the elbow 4 after it has reached the qualified posture in step (6) or (7). The elbow 4 is pushed into the feed slide 5 of the processing device, thereby realizing the feeding of the processing device.

[0049] (9) The synchronous motor 87 reverses, and the synchronous belt 86 drives the positioning block 89 to move down to be flush with the feeding track; the vibrating feeder 71 starts to work and the feeding track 72 starts to feed.

Claims

1. An automatic feeding device for elbows, characterized in that: It includes a lifting mechanism (1), a feeding mechanism (7), a lifting mechanism (8), a transfer mechanism (3), and a pushing mechanism (2); the lifting mechanism (1) feeds the elbow into the feeding mechanism (7), the feeding mechanism (7) transports the elbow to the lifting mechanism, the transfer mechanism (3) adjusts the posture of the elbow on the lifting mechanism (8), and the pushing mechanism (2) feeds the elbow into the infeed slide (5) of the processing device; the lifting mechanism (8) includes a positioning block (89) and a pushing mechanism; the positioning block (89) is located at the rear end of the feeding mechanism (7). The elbows conveyed by the feeding mechanism (7) are moved up and down by the push block mechanism; the transfer mechanism (3) includes a rotary cylinder (32) and a finger cylinder (31), with the finger cylinder (31) connected to the output end of the rotary cylinder (32); the push mechanism (2) and the infeed slide (5) of the processing device are arranged opposite to each other on both sides of the positioning block (89); the positioning block (89) moves up and down between the finger clamping position of the finger cylinder (31), the position of the infeed slide (5), and the conveying rear end of the feeding mechanism (7) under the drive of the push block mechanism.

2. The automatic elbow feeding device according to claim 1, characterized in that: The pusher mechanism includes a pusher guide rail (81), a synchronous guide plate (85), a pusher support plate (84), and a power mechanism; the pusher guide rail (81) is vertically arranged and located below the positioning support block (89), the synchronous guide plate (85) is slidably connected to the pusher guide rail (81) and is driven to slide up and down by the power mechanism; the two ends of the pusher support plate (84) are respectively connected to the positioning support block (89) and the synchronous guide plate (85).

3. The automatic elbow feeding device according to claim 2, characterized in that: The power mechanism includes a synchronous motor (87), a synchronous pulley (82), and a synchronous belt (86); the synchronous pulley (82) is located below the synchronous motor (87), and the synchronous motor (87) and the synchronous pulley (82) are connected by a synchronous belt (86); the synchronous guide plate (85) is fixed to the synchronous belt.

4. The automatic elbow feeding device according to claim 1, characterized in that: The lifting mechanism (1) includes a lifting hopper (11), a baffle cylinder (17), and a baffle plate (18); the lifting hopper (11) is slidably arranged up and down, and the bottom of the lifting hopper (11) is inclined downward towards its discharge port; the feeding mechanism (7) includes a feeding track (72), which is arranged in front of the discharge port of the lifting hopper (11); the baffle plate (18) is positioned between the lifted hopper (11) and the feeding track (72) after it is raised; the output end of the baffle cylinder (17) is connected to the baffle plate (18) and drives the baffle plate (18) to move up and down.

5. The automatic elbow feeding device according to claim 4, characterized in that: The upper part of the front end of the feeding track (72) is provided with a sliding baffle (19); the upper end of the sliding baffle (19) corresponds to the discharge port of the lifting hopper (11) after it is raised, and the lower end of the sliding baffle (19) is directly opposite the feeding track (72).

6. The automatic elbow feeding device according to claim 5, characterized in that: A screening pusher (111) is provided above the material sliding baffle (19); the material sliding baffle (19) allows the elbow to pass through in a flat position and restricts the elbow to pass through in an upright position.

7. An automatic elbow feeding device according to any one of claims 4, 5 or 6, characterized in that: The feeding mechanism (7) is equipped with an attitude sensor at the conveying end; the attitude sensor determines the attitude of the bend and controls the rising position of the positioning block (89) and whether the transfer mechanism (3) is working.

8. An automatic feeding method for elbows, employing the feeding device described in any one of claims 1-7, characterized in that, The method steps are as follows: 1) The lifting mechanism (1) feeds the elbow into the feeding mechanism (7), and the feeding mechanism (7) transports the elbow to its conveying end; 2) The feeding mechanism (7) conveys the elbow at the end into the positioning block (89); the feeding mechanism (7) stops working, and the pushing mechanism drives the positioning block (89) to rise; 3) When the elbow posture does not conform to the loading posture of the processing device: the push block mechanism drives the elbow on the positioning support block (89) to rise to the gripping position of the finger cylinder (31); the gripping finger of the finger cylinder (31) grips the elbow on the positioning support block (89); after the finger cylinder (31) grips the elbow, the rotary cylinder (32) drives the elbow to rotate to conform to the loading posture, and then the push block mechanism drives the elbow on the positioning support block (89) to descend to the position of the insert slide (5); 4) When the elbow posture matches the loading posture of the processing device: the push block mechanism drives the elbow on the positioning block (89) to rise to the position of the infeed slide (5); 5) The pushing mechanism (2) pushes the elbow in step 4) or 5) to push the elbow into the inlet slide (5) of the processing device; 6) The positioning block (89) descends to the conveying end facing the feeding mechanism (7) under the drive of the pushing mechanism; the feeding mechanism (7) starts to work.

9. The automatic feeding method for elbows according to claim 8, characterized in that: In step 1), the feeding mechanism (7) uses the attitude sensor at the end of the conveyor to determine the attitude of the bend.

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