Pipe groove processing device and processing method thereof

Abstract

The present invention discloses a pipe grooving processing device, comprising: a frame, a fixed disk is provided on the frame, three rolling wheel mounting blocks are slidably connected to the fixed disk, and the rolling wheel mounting blocks can move radially along the fixed disk; rolling wheels are rotatably connected to the rolling wheel mounting blocks; a rotary drive mechanism is simultaneously connected to the three rolling wheels; a feed drive mechanism is used to drive the three rolling wheel mounting blocks to synchronously move radially along the fixed disk; a clamping die feeding device is used to clamp the pipe and drive the pipe to move, and the pipe can rotate around its own central axis after being clamped. A floating mandrel mechanism includes a movable mandrel; when the pipe is being processed, the mandrel is inserted into the pipe. In the present invention, the rolling wheel is driven to rotate by the rotary drive mechanism, and the rotation of the rolling wheel drives the pipe to rotate, ensuring that there is rolling friction between the rolling wheel and the surface of the pipe, and no sliding friction is generated between the two, thereby effectively reducing the falling of debris and powder on the surface of the pipe during processing.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and in particular to a pipe grooving processing device and a processing method thereof. Background Art

[0002] When existing grooving machines perform grooving processing on pipe fittings, the pipe fitting is usually first fixed and clamped on the pipe fitting clamp so that the pipe fitting remains stationary and cannot rotate around its own central axis; then the feeding mechanism is used to move the rolling wheel toward the pipe fitting and press it into contact with the outside of the pipe fitting. During processing, the rolling wheel makes a circular motion on the outside of the pipe fitting, and at the same time, the rolling wheel continues to move toward the center of the pipe fitting under the action of the feeding mechanism; the rolling wheel is rotatably connected to the rolling wheel shaft, so when the rolling wheel makes a circular motion around the pipe fitting, the rolling wheel itself will also rotate around the rolling wheel shaft, so that rolling friction is formed between the rolling wheel and the outer surface of the pipe fitting; under the rotation and pressure of the rolling wheel, a ring-shaped groove structure is formed on the outside of the pipe fitting.

[0003] However, in the existing grooving processing method, since the pipe is kept stationary, the rotation of the rolling wheel itself is passive, and the rotation of the rolling wheel itself is driven by the friction between the pipe and the rolling wheel. In the actual processing process, there will be a certain friction between the rolling wheel and the rolling wheel shaft. When the friction resistance between the rolling wheel shaft and the rolling wheel is large, the friction between the rolling wheel and the pipe is insufficient to drive the rolling wheel itself to rotate, causing the rolling wheel to become stuck. In this way, the rolling friction between the rolling wheel and the outer surface of the pipe is converted from rolling friction to sliding friction. Under the sliding friction state, the rolling wheel will scratch the outer surface of the pipe, and the sliding friction will cause the surface material of the pipe to peel off and form powdery processing debris. These processing debris will fall on the equipment, which is more troublesome to clean up. Especially when processing aluminum pipes, due to the weak material of aluminum, a large amount of aluminum shavings will be generated during processing, which is very difficult to clean up. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and to provide a pipe grooving device and a processing method thereof.

[0005] The object of the present invention is achieved through the following technical solution: a pipe grooving processing device, comprising:

[0006] The frame is provided with a fixed plate, and three rolling wheel mounting blocks are slidably connected to the fixed plate, and the rolling wheel mounting blocks can move along the radial direction of the fixed plate; the rolling wheel mounting blocks are rotatably connected to the rolling wheels;

[0007] The rotary drive mechanism is connected to the three rolling wheels at the same time and is used to drive the three rolling wheels to rotate synchronously;

[0008] The feed drive mechanism is used to drive the three rolling wheel mounting blocks to move synchronously along the radial direction of the fixed disk;

[0009] The clamping die feeding device is used to clamp the pipe fittings and drive the pipe fittings to move. After being clamped, the pipe fittings can rotate around their own central axis.

[0010] The floating mandrel mechanism includes a movable mandrel; when the pipe is being processed, the mandrel is inserted into the pipe.

[0011] Preferably, the rotary drive mechanism includes a first motor, a driving gear shaft, a driven gear shaft, and a universal transmission shaft. The driving gear shaft and the driven gear shaft are both rotatably connected to the frame. The driving gear shaft is in transmission connection with the first motor, and a driving gear is provided on the driving gear shaft.

[0012] There are three driven gear shafts, each of which is provided with a driven gear, which meshes with the driving gear; a rolling wheel shaft is rotatably connected to the rolling wheel mounting block, and the rolling wheel is arranged on the rolling wheel shaft; the three driven gear shafts correspond to the three rolling wheel shafts respectively; the driven gear shaft and the corresponding rolling wheel shaft are connected through a universal transmission shaft.

[0013] Preferably, the feed drive mechanism includes a movable ring and a transmission fork, wherein the movable ring is sleeved on the outer side of the fixed disk and can slide along the axial direction of the fixed disk; a first inclined surface is provided on the rolling wheel mounting block, and a second inclined surface corresponding to the first inclined surface is provided on the inner side of the movable ring; the first inclined surface is in contact with the second inclined surface; a reset mechanism is provided between the rolling wheel mounting block and the frame;

[0014] The transmission fork is rotatably connected to the frame, one end of the transmission fork is the driving connection end, and the driving connection end is connected to the axial driving device; the other end of the transmission fork is the transmission connection end, and a fixed shaft is provided on the transmission connection end. The outer side of the movable ring is provided with a sliding groove corresponding to the fixed shaft, and the fixed shaft extends into the sliding groove;

[0015] The axial driving device includes a rotating connecting base, a rotating seat, a second motor, a screw, and a screw sleeve. The rotating connecting base is arranged on the frame, and the rotating seat is rotatably connected to the rotating connecting base; the rotating seat is provided with a second motor, and the output shaft of the second motor is connected to a screw; one end of the screw sleeve is hinged to the driving connecting end on the transmission fork, and the screw sleeve is provided with a threaded hole matching the screw, and the screw is connected to the threaded hole on the screw sleeve.

[0016] Preferably, the reset mechanism includes a reset spring rod connected to the rolling wheel mounting block, a fixed plate provided on the frame and corresponding to the rolling wheel mounting block, and the fixed plate is located outside the circumference of the movable ring;

[0017] One end of the reset spring rod is connected to the rolling wheel mounting block, the other end of the reset spring rod is a free end, the reset spring rod passes through the fixed plate, and a reset spring is provided between the free end of the reset spring rod and the fixed plate.

[0018] Preferably, the clamping die feeding mechanism includes a servo moving device and a clamping cylinder arranged on the servo moving device, and a first clamping plate and a second clamping plate are respectively provided at both ends of the clamping cylinder, and a first clamping wheel frame is provided on the first clamping wheel frame, and a first clamping wheel is rotatably connected to the first clamping wheel frame; a second clamping wheel frame is provided on the second clamping wheel frame, and a second clamping wheel corresponding to the first clamping wheel is rotatably connected to the second clamping wheel.

[0019] Preferably, the floating mandrel mechanism further comprises a mandrel seat, a guide shaft, and a guide rail, wherein a sliding seat is slidably connected to the guide rail;

[0020] A guide shaft is provided on the fixed disk, and the guide shaft is arranged along the axial direction of the fixed disk. The mandrel seat is slidably connected to the guide shaft, and one end of the mandrel is rotatably connected to the mandrel seat. The mandrel is arranged parallel to the guide shaft, and the mandrel is located between the three rolling wheels. A contact shaft is provided on the mandrel seat, and a contact sensing switch corresponding to the contact shaft is provided on the sliding seat.

[0021] A cylinder mounting seat is provided on the side of the sliding seat away from the core rod seat, a floating positioning cylinder is provided on the cylinder mounting seat, and a piston rod of the floating positioning cylinder is connected to the sliding seat;

[0022] A positioning step surface is provided on the core rod.

[0023] Preferably, the sliding seat is connected to a positioning adjustment screw, which is threadedly connected to the sliding seat, and one end of the positioning adjustment screw faces the frame.

[0024] A method for processing a pipe groove includes the following specific steps:

[0025] Step 1) clamping the pipe by the clamping die feeding device. When clamping, the pipe is placed between the first clamping wheel and the second clamping wheel. Then the clamping cylinder drives the first clamping wheel and the second clamping wheel to move closer to each other and clamp the pipe;

[0026] Step 2) The piston rod on the floating positioning cylinder extends and drives the sliding seat to move to the first working position;

[0027] Step 3) The servo moving device on the clamping die feeding device drives the pipe to move and extends the pipe between the three rolling wheels, and the mandrel is inserted from one end of the pipe; as the pipe continues to extend, the end of the pipe presses against the limit step surface on the mandrel and pushes the mandrel and the mandrel seat toward the sliding seat; when the contact shaft on the mandrel seat moves to contact the contact sensing switch on the sliding seat, the contact sensing switch is triggered and sends a trigger signal to the control system, and the control system controls the servo moving device to stop moving; then the piston rod on the floating positioning cylinder retracts and drives the sliding seat back to the second working position, so that the contact sensing switch is away from the contact shaft;

[0028] Step 4) The feeding drive mechanism drives the rolling wheel to feed toward the center of the fixed disk. The specific method is as follows: the second motor drives the screw to rotate, drives the screw sleeve to move along the axial direction of the screw and pushes the transmission fork to rotate. When the transmission fork rotates, it drives the movable ring to move along the axial direction of the fixed disk; during the movement of the movable ring, under the action of the first inclined surface and the second inclined surface, the three rolling wheel mounting blocks are driven to move toward the center of the fixed disk at the same time, so that the three rolling wheels press the outer side of the pipe fitting;

[0029] Step 5) The three rolling wheels are driven to rotate synchronously by the rotary drive mechanism. During the rotation process, the rolling wheels are driven by the feed drive mechanism to continuously move toward the center of the fixed disk, and a groove structure is formed on the outer side of the pipe under the rolling action of the rolling wheels;

[0030] Step 6) After the grooving is completed, the second motor drives the screw to rotate in the opposite direction and reset the movable ring. The rolling wheel is reset under the action of the reset mechanism and the pipe is loosened; the servo moving device drives the pipe to withdraw from between the three rolling wheels.

[0031] The beneficial effects of the present invention are as follows: in the present invention, the rolling wheel is driven to rotate by the rotary drive mechanism, and the rotation of the rolling wheel drives the pipe fitting to rotate, and the rolling wheel actively rotates, which is the active power; the three rolling wheels act on the pipe fitting at the same time, ensuring that there is rolling friction between the rolling wheel and the surface of the pipe fitting, and no sliding friction is generated between the two, thereby effectively reducing the falling of debris and powder on the surface of the pipe fitting during processing, and reducing the difficulty of cleaning the processing debris; at the same time, due to the rolling friction between the rolling wheel and the outer surface of the pipe fitting, the scratches on the surface of the pipe fitting by the rolling wheel are reduced, and the smoothness of the surface of the pipe fitting after processing is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A side view of the invention.

[0033] Figure 2 This is a schematic structural diagram of one direction of the present invention after removing the clamping die feeding device.

[0034] Figure 3 This is a schematic structural diagram of the present invention in another direction after the mold clamping and feeding device is removed.

[0035] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0036] Figure 5 This is a front view of the present invention after removing the clamping die feeding device.

[0037] Figure 6 This is a cross-sectional view of the present invention after removing the clamping die feeding device.

[0038] Figure 7 for Figure 6 Enlarged view of part B in the middle.

[0039] Figure 8 for Figure 6 Enlarged view of part D in the middle.

[0040] Figure 9 This is a front view of the clamping die feeding device.

[0041] Figure 10 It is a top view of the clamping die feeding device.

[0042] Figure 11 A cross-sectional view of the core rod.

[0043] Figure 12 This is a structural diagram of the pipe before processing.

[0044] Figure 13 This is a schematic diagram of the structure of the pipe after processing.

[0045] In the figure: 1. frame, 2. first motor, 5. universal transmission shaft, 6. clamping die feeding device, 7. floating core rod mechanism, 8. rolling wheel mounting block, 9. rolling wheel, 10. movable ring, 11. articulated seat, 12. transmission fork, 13. fixed plate, 14. return spring rod, 15. return spring, 16. rotating connecting base, 17. second motor, 18. screw, 19. screw sleeve, 20. pipe fitting, 21. core rod, 22. fixed plate, 23. rotating seat, 24. fixed shaft, 25. slide, 26. first pulley, 27. second pulley, 28. synchronous belt, 29. Driving gear shaft, 30. Driving gear, 31. Driven gear shaft, 32. Driven gear, 33. Guide rail, 34. Sliding seat, 35. Cylinder mounting seat, 36. Floating positioning cylinder, 37. Contact sensing switch, 38. Positioning adjustment screw, 39. Mandrel seat, 40. Guide shaft, 41. Rolling wheel shaft, 42. Contact shaft, 45. Servo moving device, 46. Clamping cylinder, 47. First clamping plate, 48. First clamping wheel frame, 49. First clamping wheel, 50. Second clamping wheel frame, 51. Second clamping wheel, 52. Second clamping plate, 53. Positioning step surface. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0047] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0048] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0049] like Figure 1-13 As shown, a pipe grooving processing device includes a frame 1, a rotation drive mechanism, a feed drive mechanism, a clamping die feeding device 6, a floating core rod mechanism 7, and a control system.

[0050] The frame 1 is provided with a fixed plate 22, to which three rolling wheel mounting blocks 8 are slidably connected. The fixed plate 22 is a disc-shaped structure with three guide grooves evenly arranged thereon. The guide grooves are arranged along the radial direction of the fixed plate 22, with the interval angle between adjacent guide grooves being 120 degrees. The rolling wheel mounting blocks 8 are slidably connected in the guide grooves and can slide along the guide grooves, that is, slide along the radial direction of the fixed plate 22.

[0051] The rolling wheel mounting block 8 is rotatably connected to a rolling wheel 9. Specifically, the rolling wheel mounting block 8 is rotatably connected to a rolling wheel axle 41, and the rolling wheel 9 is rotatably connected to the rolling wheel axle 41. The rolling wheel 9 can rotate around the rolling wheel axle 41.

[0052] The rotary drive mechanism is simultaneously connected to the three rolling wheels 9 and is used to drive the three rolling wheels 9 to rotate synchronously. Specifically, the rotary drive mechanism includes a first motor 2, a driving gear shaft 29, a driven gear shaft 31, and a universal joint 5. The first motor 2 is electrically connected to the control system. The driving gear shaft 29 and the driven gear shaft 31 are both rotatably connected to the frame 1. The driving gear shaft 29 is transmission-connected to the first motor 2, and a driving gear 30 is provided on the driving gear shaft 29. Among them, a first pulley 26 is provided on the output shaft of the first motor 2, and a second pulley 27 is provided on the driving gear shaft 29. A synchronous belt 28 is connected between the first pulley 26 and the second pulley 27. The first motor 2 drives the first pulley 26 to rotate, and then drives the second pulley 27, the driving gear shaft 29 and the driving gear 30 to rotate under the transmission of the synchronous belt 28.

[0053] There are three driven gear shafts 31, each equipped with a driven gear 32. These driven gears 32 mesh with the driving gear 30. When the driving gear 30 rotates, it drives the three driven gears 32 to rotate synchronously in the same direction and at the same speed. The three driven gear shafts 31 correspond one to each of the three rolling wheel shafts 41. The driven gear shafts 31 are connected to their corresponding rolling wheel shafts 41 via a universal joint 5.

[0054] The feed drive mechanism is used to drive the three rolling wheel mounting blocks 8 to move synchronously along the radial direction of the fixed disk 22. The feed drive mechanism includes a movable ring 10 and a drive fork 12. The movable ring 10 is positioned outside the fixed disk 22 and can slide axially along the fixed disk 22. The rolling wheel mounting blocks 8 are provided with a first inclined surface, and the movable ring 10 is provided inside with a second inclined surface corresponding to the first inclined surface; the first inclined surface contacts the second inclined surface.

[0055] A reset mechanism is provided between the rolling wheel mounting block 8 and the frame 1. This reset mechanism includes a reset spring rod 14 connected to the rolling wheel mounting block 8 and a fixed plate 13 mounted on the frame 1 and corresponding to the rolling wheel mounting block 8. The reset spring rod 14 is arranged radially along the fixed disk 22. The fixed plate 13 is located outside the circumference of the movable ring 10. One end of the reset spring rod 14 is connected to the rolling wheel mounting block 8, and the rolling wheel mounting block 8 is provided with a through slot for the reset spring rod 14 to pass through. The other end of the reset spring rod 14 is free and passes through the fixed plate 13. A reset spring 15 is provided between the free end of the reset spring rod 14 and the fixed plate 13. The reset spring 15 applies an elastic force to the rolling wheel mounting block 8 radially outward from the fixed disk 22, which serves to reset the rolling wheel mounting block 8.

[0056] The transmission fork 12 is rotatably connected to the frame 1. The frame 1 is provided with an articulated seat 11, to which the transmission fork 12 is rotatably connected. One end of the transmission fork 12 is a drive connection, which is connected to the axial drive device; the other end of the transmission fork 12 is a transmission connection, which is provided with a fixed shaft 24. Slide grooves 25 corresponding to the fixed shaft 24 are provided on the outer side of the movable ring 10. The slide grooves 25 are located on both horizontal sides of the movable ring 10, and the fixed shaft 24 extends into the slide grooves 25 and can slide within the slide grooves 25.

[0057] The axial drive device includes a rotating connection base 16, a rotating base 23, a second motor 17, a screw 18, and a screw sleeve 19. The second motor 17 is electrically connected to the control system. The rotating connection base 16 is mounted on the frame 1, and the rotating base 23 is rotatably connected to the rotating connection base 16. The rotating base 23 is provided with the second motor 17, and the output shaft of the second motor 17 is connected to the screw 18. One end of the screw sleeve 19 is hinged to the drive connection end of the transmission fork 12. The screw sleeve 19 has a threaded hole that matches the screw 18. The screw 18 is connected to the threaded hole in the screw sleeve 19, and the screw 18 is threadedly connected to the screw sleeve 19.

[0058] The die-feeding device 6 is located on one side of the frame 1. It is used to clamp the pipe 20 and drive the pipe 20 to move. After being clamped, the pipe 20 can rotate about its own central axis. The die-feeding mechanism includes a servo movable device 45 and a clamping cylinder 46 mounted on the servo movable device 45. In the present invention, the servo movable device 45 is a conventional device and is electrically connected to the control system. The servo movable device 45 is used to drive the clamping cylinder 46 to move in a straight line. The clamping cylinder 46 is provided with a first clamping plate 47 and a second clamping plate 52 at each end. The first clamping plate 47 is provided with a first clamping wheel frame 48, to which two first clamping wheels 49 are rotatably connected. The second clamping plate 52 is provided with a second clamping wheel frame 50, to which a second clamping wheel 51 corresponding to the first clamping wheel 49 is rotatably connected. The second clamping wheel frame 50 is provided with a first clamping wheel 49.

[0059] The floating mandrel mechanism 7 includes a movable mandrel 21; during processing, the mandrel 21 is inserted into the pipe 20. The floating mandrel mechanism 7 also includes a mandrel holder 39, a guide shaft 40, and a guide rail 33. The guide rail 33 is fixed to the frame 1, and a sliding seat 34 is slidably connected to the guide rail 33. The fixed plate 22 is provided with a guide shaft 40, which is arranged axially along the fixed plate 22. The mandrel holder 39 is slidably connected to the guide shaft 40. One end of the mandrel 21 is rotatably connected to the mandrel holder 39 via a bearing, allowing the mandrel 21 to rotate about its central axis. The mandrel 21 is arranged parallel to the guide shaft 40 and positioned between the three rolling wheels 9. A contact shaft 42 is provided on the mandrel holder 39, and a contact sensor switch 37 is provided on the sliding seat 34, corresponding to the contact shaft 42. The contact sensor switch 37 is electrically connected to the control system. In the present invention, the contact sensor switch 37 utilizes existing technology.

[0060] A cylinder mounting seat 35 is provided on the side of the sliding seat 34 away from the core rod seat 39. The cylinder mounting seat 35 is fixedly set on the frame 1. A floating positioning cylinder 36 is provided on the cylinder mounting seat 35. The piston rod of the floating positioning cylinder 36 is connected to the sliding seat 34, and the sliding seat 34 is driven to move along the guide rail 33 by the floating positioning cylinder 36.

[0061] The sliding seat 34 is connected to a positioning adjustment screw, which is threadedly connected to the sliding seat 34, with one end of the positioning adjustment screw facing the frame 1. A positioning step surface 53 is provided on the core rod 21.

[0062] When the present invention performs grooving on the pipe 20, the processing method is as follows:

[0063] Step 1) The pipe is clamped by the clamping die feeding device 6. When clamping, the pipe is placed between the first clamping wheel 49 and the second clamping wheel 51, and then the clamping cylinder 46 drives the first clamping wheel 49 and the second clamping wheel 51 to move closer to each other and clamp the pipe.

[0064] The two first clamping wheels 49 and the second clamping wheels 51 clamp the outside of the pipe from three directions. After the pipe is clamped, since the first clamping wheels 49 and the second clamping wheels 51 can both rotate, the pipe can rotate around its own central axis. However, if the servo moving device 45 is not started, the pipe cannot move around its axial direction.

[0065] Step 2) The piston rod of the floating positioning cylinder 36 extends and drives the sliding seat 34 to move to the first working position.

[0066] Step 3) The servo moving device 45 on the clamping die feeding device 6 drives the pipe to move and extends the pipe between the three rolling wheels 9, and the core rod 21 is inserted from one end of the pipe; as the pipe continues to extend, the end of the pipe presses against the limiting step surface on the core rod 21 and pushes the core rod 21 and the core rod seat 39 toward the sliding seat 34; when the contact shaft 42 on the core rod seat 39 moves to contact the contact sensing switch 37 on the sliding seat 34, the contact sensing switch 37 is triggered and sends a trigger signal to the control system, and the control system controls the servo moving device 45 to stop moving; then the piston rod on the floating positioning cylinder 36 retracts and drives the sliding seat 34 to retreat to the second working position, so that the contact sensing switch 37 is away from the contact shaft 42.

[0067] Among them, when the sliding seat 34 retreats to the second working position, there is a certain distance between the contact sensing switch 37 on the sliding seat 34 and the contact shaft 42, and the distance is 1-2 mm, so that the core rod 21 is in a floating state in the axial direction, and the core rod 21 and the pipe fitting have a certain floating space in the axial direction, so that the pipe fitting has a certain forward and backward extension space during the processing process.

[0068] Step 4) The rolling wheel 9 is driven to feed toward the center direction of the fixed disk 22 by the feed drive mechanism. The specific method is as follows: the second motor 17 drives the screw rod 18 to rotate, drives the screw rod sleeve 19 to move along the axial direction of the screw rod 18 and pushes the transmission fork 12 to rotate. When the transmission fork 12 rotates, it drives the movable ring 10 to move along the axial direction of the fixed disk 22; during the movement of the movable ring 10, under the action of the first inclined surface and the second inclined surface, the three rolling wheel mounting blocks 8 are driven to move toward the center direction of the fixed disk 22 at the same time, so that the three rolling wheels 9 press the outside of the pipe fitting.

[0069] Step 5) The three rolling wheels 9 are driven to rotate synchronously by the rotary drive mechanism. During the rotation process, the rolling wheels 9 are driven by the feed drive mechanism to continuously move toward the center direction of the fixed disk 22, and a groove structure is formed on the outside of the pipe under the rolling action of the rolling wheels 9.

[0070] In this step, the tube is rotated by the rotation of the rolling wheel 9, which actively rotates. During the rotation of the tube, the core rod 21 also rotates synchronously with the tube, and the clamping die feeding device 6 provides auxiliary support for one end of the tube.

[0071] Step 6) After the grooving process is completed, the second motor 17 drives the screw 18 to rotate in the opposite direction and reset the movable ring 10. The rolling wheel 9 is reset under the action of the reset mechanism and the pipe is loosened; the servo moving device 45 drives the pipe to withdraw from between the three rolling wheels 9, thereby completing the grooving process on the pipe.

[0072] In the present invention, the rolling wheel 9 is driven to rotate by a rotary drive mechanism, and the rotation of the rolling wheel 9 drives the pipe to rotate. The rolling wheel 9 actively rotates and serves as the active power. The three rolling wheels 9 act on the pipe at the same time, ensuring that there is rolling friction between the rolling wheel 9 and the surface of the pipe, and no sliding friction is generated between the two, thereby effectively reducing the falling of debris and powder on the surface of the pipe during processing and reducing the difficulty of cleaning the processing debris. At the same time, due to the rolling friction between the rolling wheel 9 and the outer surface of the pipe, the scratches on the surface of the pipe by the rolling wheel 9 are reduced, and the smoothness of the surface of the pipe after processing is improved.

[0073] During the processing of the pipe fitting, a core rod 21 is inserted into the pipe fitting to provide good support for the pipe fitting and improve the processing accuracy; during the processing, the core rod 21 is in a floating state, so that the pipe fitting has a certain floating space in the axial direction, thereby allowing the pipe fitting to have a certain forward and backward extension space during the processing.

[0074] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A pipe grooving device, characterized in that: include: The frame is provided with a fixed plate, and three rolling wheel mounting blocks are slidably connected to the fixed plate, and the rolling wheel mounting blocks can move along the radial direction of the fixed plate; the rolling wheel mounting blocks are rotatably connected to the rolling wheels; A rotary drive mechanism is connected to the three rolling wheels at the same time, and is used to drive the three rolling wheels to rotate synchronously; the rotary drive mechanism includes a first motor, a driving gear shaft, a driven gear shaft, and a universal transmission shaft, the driving gear shaft and the driven gear shaft are both rotatably connected to the frame, the driving gear shaft is transmission-connected to the first motor, and the driving gear shaft is provided with a driving gear; there are three driven gear shafts, and the driven gear shaft is provided with a driven gear, and the driven gear is meshed with the driving gear; the rolling wheel mounting block is rotatably connected to a rolling wheel shaft, and the rolling wheel is provided on the rolling wheel shaft; the three driven gear shafts correspond to the three rolling wheel shafts one by one respectively; the driven gear shaft and the corresponding rolling wheel shaft are connected via a universal transmission shaft; The feed drive mechanism is used to drive the three rolling wheel mounting blocks to move synchronously along the radial direction of the fixed disk; the feed drive mechanism includes a movable ring and a transmission fork, the movable ring is sleeved on the outer side of the fixed disk and can slide along the axial direction of the fixed disk; a first inclined surface is provided on the rolling wheel mounting block, and a second inclined surface corresponding to the first inclined surface is provided on the inner side of the movable ring; the first inclined surface contacts the second inclined surface; a reset mechanism is provided between the rolling wheel mounting block and the frame; the reset mechanism includes a reset spring rod connected to the rolling wheel mounting block, a fixed plate provided on the frame and corresponding to the rolling wheel mounting block, and the fixed plate is located outside the circumference of the movable ring; one end of the reset spring rod is connected to the rolling wheel mounting block, and the other end of the reset spring rod is a free end, the reset spring rod passes through the fixed plate, and a reset spring is provided between the free end of the reset spring rod and the fixed plate; The transmission fork is rotatably connected to the frame, one end of the transmission fork is the driving connection end, and the driving connection end is connected to the axial driving device; the other end of the transmission fork is the transmission connection end, and a fixed shaft is provided on the transmission connection end. The outer side of the movable ring is provided with a sliding groove corresponding to the fixed shaft, and the fixed shaft extends into the sliding groove; The axial drive device includes a rotating connection base, a rotating seat, a second motor, a screw, and a screw sleeve. The rotating connection base is arranged on the frame, and the rotating seat is rotatably connected to the rotating connection base; the rotating seat is provided with a second motor, and the output shaft of the second motor is connected to a screw; one end of the screw sleeve is hinged to the driving connection end on the transmission fork, and the screw sleeve is provided with a threaded hole matching the screw, and the screw is connected to the threaded hole on the screw sleeve; The clamping die feeding device is used to clamp the pipe fitting and drive the pipe fitting to move. After being clamped, the pipe fitting can rotate around its own central axis. The clamping die feeding device includes a servo moving device and a clamping cylinder arranged on the servo moving device. The two ends of the clamping cylinder are respectively provided with a first clamping plate and a second clamping plate. The first clamping plate is provided with a first clamping wheel frame, and the first clamping wheel frame is rotatably connected to the first clamping wheel. The second clamping plate is provided with a second clamping wheel frame, and the second clamping wheel frame is rotatably connected to the second clamping wheel. The floating mandrel mechanism includes a movable mandrel; when the pipe fitting is being processed, the mandrel is inserted into the pipe fitting; the floating mandrel mechanism also includes a mandrel seat, a guide shaft, and a guide rail, and a sliding seat is slidably connected to the guide rail; a guide shaft is provided on the fixed disk, and the guide shaft is arranged along the axial direction of the fixed disk, the mandrel seat is slidably connected to the guide shaft, one end of the mandrel is rotatably connected to the mandrel seat, the mandrel is arranged parallel to the guide shaft, and the mandrel is located between the three rolling wheels; a contact shaft is provided on the mandrel seat, and a contact sensing switch corresponding to the contact shaft is provided on the sliding seat; a cylinder mounting seat is provided on the side of the sliding seat away from the mandrel seat, and a floating positioning cylinder is provided on the cylinder mounting seat, and the piston rod of the floating positioning cylinder is connected to the sliding seat; a positioning step surface is provided on the mandrel.

2. A pipe grooving device according to claim 1, characterized in that: The sliding seat is connected with a positioning adjustment screw, which is threadedly connected to the sliding seat, and one end of the positioning adjustment screw is facing the frame.

3. A pipe grooving method, based on the pipe grooving device according to claim 1, characterized in that: The specific steps include: Step 1) The pipe is clamped by the clamping die feeding device. When clamping, the pipe is placed between the first clamping wheel and the second clamping wheel. Then the clamping cylinder drives the first clamping wheel and the second clamping wheel to move closer to each other and clamp the pipe; Step 2) The piston rod on the floating positioning cylinder extends and drives the sliding seat to move to the first working position; Step 3) The servo moving device on the clamping die feeding device drives the tube to move and insert the tube between the three rolling wheels, and the mandrel is inserted from one end of the tube; as the tube continues to be inserted, the end of the tube presses against the limit step surface on the mandrel and pushes the mandrel and the mandrel seat toward the sliding seat; when the contact shaft on the mandrel seat moves to contact the contact sensing switch on the sliding seat, the contact sensing switch is triggered and sends a trigger signal to the control system, which controls the servo moving device to stop moving; then the piston rod on the floating positioning cylinder retracts and drives the sliding seat back to the second working position, so that the contact sensing switch is away from the contact shaft; Step 4) The feed drive mechanism drives the rolling wheel to feed toward the center of the fixed disk. The specific method is as follows: the second motor drives the screw to rotate, drives the screw sleeve to move along the axial direction of the screw and pushes the transmission fork to rotate. When the transmission fork rotates, it drives the movable ring to move along the axial direction of the fixed disk; during the movement of the movable ring, under the action of the first inclined surface and the second inclined surface, it drives the three rolling wheel mounting blocks to move toward the center of the fixed disk at the same time, so that the three rolling wheels press the outer side of the pipe fitting; Step 5) The three rolling wheels are driven to rotate synchronously by the rotary drive mechanism. During the rotation process, the rolling wheels are driven by the feed drive mechanism to continuously move toward the center of the fixed disk, and a groove structure is formed on the outer side of the pipe under the rolling action of the rolling wheels; Step 6) After the grooving is completed, the second motor drives the screw to rotate in the opposite direction and reset the movable ring. The rolling wheel is reset under the action of the reset mechanism and the pipe is loosened; the servo moving device drives the pipe to withdraw from between the three rolling wheels.

Images