A metal hose processing device

Abstract

The application relates to the technical field of metal hose cutting, in particular to a metal hose processing device; the device comprises a conveying mechanism and an annular cutting cylinder fixedly connected to a workbench; a track table is arranged at the rear side of the workbench; a track frame is movably connected to the top of the track table along the track; a positioning rod is fixedly connected to the left of the track frame; accommodating grooves are uniformly arranged on the arc-shaped outer wall of the positioning rod along the circumferential direction; a transmission groove is arranged on the inner wall of the positioning rod close to the center of the positioning rod; an accommodating plate capable of being driven by a transmission assembly in the transmission groove is arranged in the accommodating groove; the accommodating plate can move radially along the positioning rod under the drive of the transmission assembly; the radial accommodating plate on the arc-shaped outer wall of the positioning rod cooperates with the expansion plate driven by the inclined plane, so that the pipe cutting position is concentratedly axially tensioned and radially tensioned and supported before cutting, and the pipe cutting effect and the pipe cutting efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of metal hose cutting technology, specifically a metal hose processing device. Background Technology

[0002] Metal hoses are commonly used flexible connectors in industrial piping systems, widely applied in complex working environments such as machinery, chemicals, oil and gas transportation, and HVAC equipment. They possess excellent flexibility, vibration resistance, corrosion resistance, high temperature resistance, and deformation resistance, effectively adapting to special application scenarios such as pipeline misalignment and equipment vibration. A typical metal round hose mainly consists of an inner metal corrugated tube, an outer metal braided tube, and a flange structure fixedly connected to the end of the metal corrugated tube. The outer metal braided tube serves as the core protective and reinforcing structure of the metal hose. It is composed of multiple strands of metal wires interwoven to form a mesh structure. The overall shape is maintained only by the friction between the interwoven wires, making it a key component that ensures the overall structural strength, wear resistance, and pressure resistance of the metal hose. In the overall processing flow of metal hoses, the metal braided tube must first be woven into shape using braiding equipment, and then cut into suitable standard lengths using specialized processing equipment such as cutting machines according to product specifications.

[0003] Current cutting methods generally involve automatic feeding of metal braided tubing via a conveying mechanism. After the tubing is conveyed to a length exceeding the specified cutting point, it must be tightened and straightened as a whole before cutting can be performed. This is because, in its naturally relaxed state, the braided layer of the metal braided tubing is loose, the gaps between the threads are large, and there is residual spring stress inside, making the tubing prone to bending, twisting, and local collapse. The tightening and straightening process before cutting is a necessary step to ensure cutting quality. Its core function is to fix the braided threads through axial tension, significantly reducing the problems of fraying, bursting, and shedding after cutting, and ensuring that the cut is vertical, flat, without bevels, and of uniform length. However, the current industry's cutting and tightening process for metal braided tubing mostly adopts the overall axial tightening method, which requires the entire section of the metal braided tubing to be cut to be stretched and tightened throughout the entire process. The overall tightening operation consumes a lot of stroke time, and the long stretching adjustment stroke and slow response speed, especially for some long metal braided tubing, greatly reducing the overall efficiency of metal braided tubing cutting and processing. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a metal hose processing device. This invention uses a radially movable receiving plate on the arc-shaped outer wall of the positioning rod to cooperate with an expansion plate driven by an inclined plane, thereby concentrating axial tension and radial tension and support at the cutting position of the pipe before cutting, thus improving the cutting effect and efficiency of the pipe.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A metal hose processing device according to this invention includes a conveying mechanism and an annular cutting cylinder fixedly connected to a workbench; a track platform is provided on the rear side of the workbench; a track frame is movably connected to the top of the track platform along the track; a positioning rod is fixedly connected to the track frame on the left; a receiving groove is evenly arranged circumferentially on the front position of the arc-shaped outer wall of the positioning rod; a transmission groove is provided on the inner wall of the receiving groove near the center of the positioning rod; a receiving plate is provided in the receiving groove that can be driven by the transmission component in the transmission groove; the receiving plate... It can move radially along the positioning rod under the drive of the transmission component; the outer middle position of the receiving plate is recessed, and the end positions are symmetrically provided with plate slopes; the plate slopes are provided with outer wedge grooves; an outer wedge block with the same cross-section of an isosceles trapezoid is slidably connected in the outer wedge groove; the two outer wedge blocks are connected to the inner wall of the outer wedge groove by an outer spring on the opposite side of each other; an expansion plate is fixedly connected to the side of the outer wedge block away from the receiving plate; the side of the expansion plate away from the receiving plate is arc-shaped and rough; the two expansion plates on the outer side of the receiving plate will move away from each other during the compression process.

[0006] Preferably, the transmission component is a miniature electric push rod; the tail end of the miniature electric push rod is connected to the bottom of the transmission groove, and the other end is fixedly connected to the receiving plate.

[0007] Preferably, the transmission assembly includes a connecting rod, a double-acting lead screw, a threaded sleeve, and a rod motor; the positioning rod has a central groove inside; the double-acting lead screw driven by the rod motor is rotatably connected in the central groove; the threaded sleeve is threadedly connected to both ends of the double-acting lead screw; two connecting rods are hinged to each other in the transmission groove; the receiving plate has two parallel inner wedge grooves on the side facing the double-acting lead screw; an inner wedge block with the same isosceles trapezoidal cross-section is slidably connected in the inner wedge groove; one end of the connecting rod is hinged to the inner wedge block, and the other end is hinged to the outer wall of the threaded sleeve.

[0008] Preferably, the inner wedge block is connected to the inner wall of the inner wedge groove by an inner spring.

[0009] Preferably, during the process of the receiving plate contacting the inner wall of the pipe through the expansion plate, a gap is maintained between the inner wall of the pipe and the receiving plate; after the expansion plate retracts radially along the positioning rod, the outer wall of the expansion plate adapts to the arc-shaped outer wall of the positioning rod.

[0010] Preferably, the expansion plate facing the receiving plate makes movable contact with the inclined surface of the plate; the expansion plate has an anti-slip groove inside; an anti-slip plate is slidably connected in the anti-slip groove; the anti-slip plate facing away from the receiving plate is connected to the inner wall of the anti-slip groove by an anti-slip spring; the expansion plate away from the receiving plate has an anti-slip hole communicating with the anti-slip groove; an anti-slip protrusion fixedly connected to the anti-slip plate is movably connected in the anti-slip hole; the expansion plate near the receiving plate has an active groove communicating with the anti-slip groove; an active block fixedly connected to the anti-slip plate is slidably connected in the active groove; the end of the active block extending outward from the active groove is arc-shaped; the width of the active block is greater than the width of the outer wedge groove.

[0011] Preferably, all the anti-slip protrusions extend or retract to maintain the same length from the anti-slip hole.

[0012] Preferably, the expansion plate has an extension groove on its arc-shaped edge; multiple extension grooves are slidably connected to extension strips with the same isosceles trapezoidal cross-section; two inclined grooves on the inclined surface of the plate are distributed in a figure-eight shape and are symmetrically arranged based on the outer wedge groove; inclined blocks are slidably connected to the inclined grooves; the inclined blocks are fixedly connected to extension strips of different lengths; the arc-shaped edge of the expansion plate is provided with an extension plate fixedly connected to the extension strips; the side of the extension plate that contacts the inner wall of the pipe is arc-shaped.

[0013] Preferably, the extension strip is elastic and can recover after being bent under pressure.

[0014] Preferably, the inner wall of the annular cutting cylinder is provided with an annular groove; the inner wall of the annular groove is provided with an annular toothed groove; an outer toothed ring is rotatably connected in the annular toothed groove; a gear is meshed and driven by the outer edge of the outer toothed ring; the gear is driven by a cutting motor; a rotating ring is rotatably connected in the annular groove and fixedly connected to the outer toothed ring; a first electric push rod is fixedly connected to the side of the rotating ring opposite to the outer toothed ring; the extension and retraction direction of the first electric push rod is radial to the rotating ring; a second motor is fixedly connected to the end of the first electric push rod; and a disc-shaped cutter is fixedly connected to the output end of the second motor.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses a radially movable receiving plate on the arc-shaped outer wall of the positioning rod to cooperate with an expansion plate of inclined plane transmission, thereby concentrating axial tension and radial tension and support at the pipe cutting position before cutting, thus improving the pipe cutting effect and cutting efficiency.

[0016] 2. Because the expansion plate can be folded into the receiving groove and the outer wall of the expansion plate is adapted to the arc-shaped outer wall of the positioning rod, the process of fitting the pipe onto the positioning rod will not cause obstruction or scratching, making the entire process of fitting the pipe onto the positioning rod smoother. Similarly, the pipe can be removed from the positioning rod more smoothly.

[0017] 3. The present invention utilizes the anti-slip protrusion structure that extends and retracts within the anti-slip holes on the arc-shaped outer wall of the expansion plate, effectively improving the anti-slip and anti-detachment effect of the pipe fitting when tensioned, ensuring cutting accuracy. At the same time, the outer wall is smooth after retraction, preventing the pipe fitting from being scratched or blocked during disassembly and assembly, making the working process more stable. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 A stereoscopic image from another perspective; Figure 3 This is a diagram showing the position of the miniature electric actuator in this invention; Figure 4 This is a cross-sectional view of the positioning rod in this invention; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 This is a perspective view of the positioning rod in this invention; Figure 7 This is a structural diagram of the connecting rod and the bidirectional lead screw in this invention; Figure 8 This is a diagram showing the position of the inner wedge groove in this invention; Figure 9 This is a diagram showing the location of the inclined groove in this invention; Figure 10 This is a structural diagram of the expansion plate near the receiving plate in this invention; Figure 11 This is a diagram showing the position of the cutting blade in this invention; Figure 12 This is a structural diagram of the external toothed ring in this invention.

[0020] In the diagram: 1. Workbench; 11. Conveying mechanism; 12. Annular cutting cylinder; 13. Annular groove; 14. Annular toothed groove; 15. External toothed ring; 16. Gear; 17. Cutting motor; 18. Rotary ring; 2. Track platform; 21. Track frame; 3. Positioning rod; 31. Receiving groove; 32. Transmission groove; 33. Center groove; 4. Transmission assembly; 41. Miniature electric push rod; 42. Connecting rod; 43. Two-way lead screw; 44. Threaded sleeve; 45. Rod motor; 5. Receiving plate; 51. Plate inclined surface; 52. External wedge groove; 53. External wedge block; 54. External spring; 55. Internal wedge groove; 56. Internal wedge block; 57. Inclined groove; 58. Expansion plate; 61. Anti-slip groove; 62. Anti-slip plate; 63. Anti-slip spring; 64. Anti-slip hole; 65. Anti-slip protrusion; 66. Active groove; 67. Active block; 68. Extension groove; 7. Extension plate; 71. Extension strip; 72. Inclined block; 8. First electric push rod; 81. Second motor; 82. Cutter. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 12 As shown, the present invention includes the following embodiments: Example 1: A metal hose processing device includes a conveying mechanism 11 and an annular cutting cylinder 12 fixedly connected to a workbench 1; a track platform 2 is provided on the rear side of the workbench 1; a track frame 21 is movably connected to the top of the track platform 2 along the track; a positioning rod 3 is fixedly connected to the left side of the track frame 21; a receiving groove 31 is uniformly arranged circumferentially on the front position of the arc-shaped outer wall of the positioning rod 3; a transmission groove 32 is provided on the inner wall of the receiving groove 31 near the center of the positioning rod 3; a receiving plate 5 is provided in the receiving groove 31 and can be driven by a transmission component 4 in the transmission groove 32; the receiving plate 5 can move radially along the positioning rod 3 under the drive of the transmission component 4; The outer middle of the receiving plate 5 is recessed, and the ends are symmetrically provided with inclined plate surfaces 51; the inclined plate surface 51 is provided with an outer wedge groove 52; an outer wedge block 53 with the same cross-section of an isosceles trapezoid is slidably connected in the outer wedge groove 52 (the size of the outer wedge groove 52 decreases as it moves away from the bottom of the groove to prevent it from falling off); the two outer wedge blocks 53 are connected to the inner wall of the outer wedge groove 52 by an outer spring 54 on their opposite sides; an expansion plate 6 is fixedly connected to the side of the outer wedge block 53 away from the receiving plate 5; the side of the expansion plate 6 away from the receiving plate 5 is arc-shaped and rough; the two expansion plates 6 on the outer side of the receiving plate 5 will move away from each other during the compression process.

[0023] During processing, the woven, uncut metal braided tubing is first placed at the conveyor mechanism 11 station of the workbench 1. The tubing is clamped and positioned in all directions by two sets of symmetrical and counter-rotating conveyor belts on the upper and lower sides of the conveyor mechanism 11. Under the stable drive of the matching drive components, the two sets of conveyor belts operate synchronously, precisely driving the metal braided tubing, which has gaps between the wires and residual elastic stress in the slack state, to be conveyed at a uniform speed from front to back. This allows the tubing to pass smoothly through the hollow inner side of the fixed annular cutting cylinder 12 on the workbench 1, completing the initial feeding and positioning of the tubing cutting station.

[0024] Subsequently, the drive structure on the track platform 2 behind the workbench 1 is activated, controlling the track frame 21 to slide forward precisely along the track platform 2. The forward-moving track frame 21 drives the fixedly connected positioning rod 3 to move synchronously, so that the conical end of the positioning rod 3 is precisely inserted into the annular cutting cylinder 12 and extends into the hollow inner side of the pipe fitting. As the conveying mechanism 11 continues to feed material at a uniform speed, the pipe fitting is gradually and completely fitted onto the outer circumference of the positioning rod 3, completing the nesting assembly of the pipe fitting and the positioning rod 3. After the assembly is completed, the feeding action of the conveying mechanism 11 is stopped. Then, the transmission component 4 inside the transmission groove 32 of the positioning rod 3 is activated. Through the power output of the transmission component 4, the receiving plate 5 inside the circumferentially evenly distributed receiving groove 31 of the positioning rod 3 slides smoothly outward along the radial direction of the positioning rod 3, so that the receiving plate 5 originally stored inside the receiving groove 31 gradually extends outward, and simultaneously drives the expansion plate 6 assembled at the end of the receiving plate 5 to slowly adhere to the inner wall surface of the pipe fitting, forming a preliminary radial support for the inner wall of the pipe fitting, effectively improving the bending state of the pipe fitting during cutting. As the transmission assembly 4 continuously drives the receiving plate 5 to slide away from the center of the positioning rod 3, the expansion plate 6 continuously supports the inner wall of the pipe and is subjected to the reverse extrusion force of the inner wall of the pipe. This extrusion force acts on the expansion plate 6, causing the outer wedge block 53 fixedly connected to the inner side of the expansion plate 6 to slide smoothly along the outer wedge groove 52 on the receiving plate 5. Simultaneously, it extrudes the outer spring 54 between the outer wedge groove 52 and the outer wedge block 53, causing it to undergo compression deformation. This, in turn, causes the two expansion plates 6 symmetrically arranged on the same receiving plate 5 to overcome the limiting resistance and separate from each other. The high pressure generated between the rough arc surface of the outer side of the expansion plate 6 and the inner wall of the pipe is utilized. The strong static friction force firmly adheres to the inner wall of the pipe and provides bidirectional axial tension to the areas before and after the pipe cutting point. This allows the area to be cut to simultaneously achieve radial rigid support, radial tension, and axial tension. At the same time, the uniform gap formed after the adjacent expansion plates 6 are opened provides sufficient clearance for the cutting blade 82 inside the annular cutting cylinder 12, avoiding hard collisions and structural interference between the cutting blade 82 and the expansion plates 6 during the cutting process. Finally, with the pipe area to be cut maintaining high tension and a stable, regular shape without deformation throughout the process, the annular cutting cylinder 12 is activated to perform high-precision annular cutting on the tensioned and shaped pipe.

[0025] After the cutting is completed, the control track table 2 drives the track frame 21 to move backward. The track frame 21 will drive the positioning rod 3 to move out from the inside of the annular cutting cylinder 12. The cut pipe can be removed from the positioning rod 3. Then, the positioning rod 3 is controlled to enter the inside of the annular cutting cylinder 12 again, and so on.

[0026] The present invention uses a radially movable receiving plate 5 on the arc-shaped outer wall of the positioning rod 3 to cooperate with an expansion plate 6 of inclined plane transmission, thereby concentrating axial tension and radial tension and support on the cutting position of the pipe before cutting, thereby improving the cutting effect and cutting efficiency of the pipe.

[0027] Example 2: The transmission component 4 is a miniature electric push rod 41; the tail end of the miniature electric push rod 41 is connected to the bottom of the transmission groove 32, and the other end is fixedly connected to the receiving plate 5.

[0028] When the miniature electric push rod 41 extends, it causes the receiving plate 5 to move radially outward along the positioning rod 3. The receiving plate 5 then causes the expansion plate 6 to support and tension the inner wall of the pipe. When the miniature electric push rod 41 shortens, it causes the receiving plate 5 to retract radially inward along the positioning rod 3, so that the receiving plate 5 causes the expansion plate 6 to retract back into the receiving groove 31.

[0029] Example 3: The transmission assembly 4 includes a connecting rod 42, a bidirectional lead screw 43, a threaded sleeve 44, and a rod motor 45; the positioning rod 3 has a central groove 33 inside; the bidirectional lead screw 43 driven by the rod motor 45 is rotatably connected in the central groove 33; the threaded sleeve 44 is threadedly connected to both ends of the bidirectional lead screw 43; the transmission groove 32 has two connecting rods 42 that are hinged to each other; the receiving plate 5 has two parallel inner wedge grooves 55 on the side facing the bidirectional lead screw 43; an inner wedge block 56 with the same cross-section of an isosceles trapezoid is slidably connected in the inner wedge groove 55 (the size of the inner wedge groove 55 decreases as it moves away from the bottom of the groove to prevent it from falling off); one end of the connecting rod 42 is hinged to the inner wedge block 56, and the other end is hinged to the outer wall of the threaded sleeve 44.

[0030] In this embodiment, the inner wedge block 56 is connected to the inner wall of the inner wedge groove 55 by an inner spring 57. After the pipe fitting is delivered and nested in place, the rod motor 45 in the positioning rod 3 is activated to drive the bidirectional lead screw 43 to rotate. Utilizing the reverse thread structure at both ends of the bidirectional lead screw 43, the two threaded sleeves 44 move synchronously towards each other. The threaded sleeves 44 drive the hinged connecting rod 42 to move closer together, causing the two connecting rods 42 to cross-deflect within the transmission groove 32. The transmission groove 32 and the receiving groove 31 are provided with at least three sections. During the cross-deflection of the connecting rods 42, the inner wedge block 56 is pushed along the inner wall of the receiving plate 5. The wedge groove 55 slides and squeezes the inner spring 57 to generate compression deformation. At the same time, the two inner wedge blocks 56 move closer to each other synchronously. Through the pushing action of the connecting rod 42, the receiving plate 5 is driven to extend smoothly outward along the radial direction of the positioning rod 3, which drives the expansion plate 6 to disengage from the receiving groove 31 and fit tightly against the inner wall of the pipe fitting, thereby achieving radial support in the pipe fitting cutting area. At the same time, the expansion plate 6 structure squeezes the pipe fitting, completing the radial tension and axial tension of the pipe fitting cutting position. Under the elastic balance of the inner spring 57, the two expansion plates 6 are always symmetrically arranged relative to the pipe fitting cut, which can be adapted to the non-interference cutting operation of the annular cutting cylinder 12.

[0031] After the pipe cutting process is completed, the control rod motor 45 rotates in the reverse direction, driving the bidirectional lead screw 43 to reverse, causing the threaded sleeves 44 at both ends to move away from each other and reset. The connecting rod 42 then rotates in the opposite direction, and with the elastic rebound of the inner spring 57, it pulls the inner wedge block 56 and the receiving plate 5 to retract radially in sync, so that the expansion plate 6 is completely housed inside the receiving groove 31. This releases the support and tension limit on the inner wall of the pipe, and the finished pipe can be removed, completing a single processing flow and allowing for cyclical operation. This embodiment can keep the positioning rod 3 inserted into the inner side of the pipe with a smaller diameter, and the connecting rod 42 structure is suitable for pipes of different diameters and has a wider range of applications.

[0032] Example 4: During the process of the receiving plate 5 contacting the inner wall of the pipe through the expansion plate 6, a gap is maintained between the inner wall of the pipe and the receiving plate 5; after the expansion plate 6 retracts radially along the positioning rod 3, the outer wall of the expansion plate 6 adapts to the arc-shaped outer wall of the positioning rod 3.

[0033] With the gap maintained between the receiving plate 5 and the inner wall of the pipe, there will be no interference between the receiving plate 5 and the cutter 82 during the cutting process, making the cutting process more stable. In addition, since the expansion plate 6 can be folded into the receiving groove 31 and the outer wall of the expansion plate 6 is adapted to the arc-shaped outer wall of the positioning rod 3, there will be no obstruction or scratching during the process of the pipe fitting being placed on the positioning rod 3, making the entire process of the pipe fitting being placed on the positioning rod 3 smoother. Similarly, the pipe fitting is removed from the positioning rod 3 more smoothly.

[0034] Example 5: The expansion plate 6 facing the receiving plate 5 is in movable contact with the inclined surface 51 of the plate; the expansion plate 6 is provided with an anti-slip groove 61; an anti-slip plate 62 is slidably connected in the anti-slip groove 61; the side of the anti-slip plate 62 away from the receiving plate 5 is connected to the inner wall of the anti-slip groove 61 by an anti-slip spring 63; the side of the expansion plate 6 away from the receiving plate 5 is provided with an anti-slip hole 64 communicating with the anti-slip groove 61; an anti-slip protrusion 65 fixedly connected to the anti-slip plate 62 is movably connected in the anti-slip hole 64; the side of the expansion plate 6 near the receiving plate 5 is provided with an active groove 66 communicating with the anti-slip groove 61; an active block 67 fixedly connected to the anti-slip plate 62 is slidably connected in the active groove 66; the end of the active block 67 extending out of the active groove 66 is arc-shaped; the width of the active block 67 is greater than the width of the outer wedge groove 52.

[0035] In this embodiment, all the anti-slip protrusions 65 extend or retract to maintain the same length from the anti-slip holes 64. When the device performs internal support tensioning on the metal braided pipe, as the receiving plate 5 slides smoothly outward along the positioning rod 3, it drives the two corresponding expansion plates 6 to synchronously adhere to the inner wall of the pipe. The reverse extrusion force generated by the inner wall of the pipe acts on the overall structure of the expansion plate 6, forcing the isosceles trapezoidal outer wedge block 53 on the inner side of the expansion plate 6 to slide smoothly along the outer wedge groove 52 of the receiving plate 5, synchronously compressing the outer spring 54 to undergo compression deformation, thereby causing the two symmetrically arranged expansion plates 6 on the same receiving plate 5 to move away from each other and spread apart. During the entire process of the expansion plates 6 sliding and unfolding relative to each other, the active block 67 extending from the inner side of the expansion plate 6 is squeezed by the inclined plate 51, relying on the active block 6 7. Due to the guiding characteristics of the outer arc-shaped structure, the inclined surface 51 of the plate will continuously exert a squeezing force on the active block 67, gradually squeezing and pushing the active block 67 into the active groove 66. While the active block 67 retracts and displaces, it overcomes the elastic force of the anti-slip spring 63, driving the anti-slip plate 62 to slide smoothly towards the inner wall of the pipe in the anti-slip groove 61 inside the expansion plate 6. The sliding process is stable and without jamming. Subsequently, the anti-slip plate 62 simultaneously drives the connected anti-slip protrusion 65 to extend precisely outward along the anti-slip hole 64, so that the anti-slip protrusion 65 protrudes out of the originally smooth arc-shaped outer wall of the expansion plate 6. The extension length of the anti-slip protrusion 65 at all positions is kept at a consistent height, which improves the biting friction between the expansion plate 6 and the inner wall of the pipe, prevents slippage during the axial tensioning of the pipe, and effectively ensures the stability of the axial tensioning of the pipe.

[0036] After the complete pipe fitting cutting process is completed, the receiving plate 5 drives the expansion plate 6 to retract radially towards the center of the positioning rod 3. The expansion plate 6 gradually disengages from the inner wall limit of the pipe fitting, and the squeezing force of the inner wall of the pipe fitting on the expansion plate 6 decreases. At this time, the outer spring 54, which is in a compressed state, quickly rebounds and resets, pushing the outer wedge block 53 to slide in the opposite direction along the outer wedge groove 52, causing the two expansion plates 6 to move closer together and reset. After the position of the expansion plate 6 changes, the active block 67 disengages from the squeezing constraint of the inclined plate 51 and moves with the expansion plate 6 to the recessed area outside the receiving plate 5, leaving sufficient space for the active block 67 to rebound outward. The anti-slip spring 63, which was originally compressed, rebounds elastically after losing the squeezing force, pushing the anti-slip plate 62 to reset and slide along the anti-slip groove 61. The moving block 67 extends out of the active groove 66 again, while the anti-slip protrusions 65 retract inward along the anti-slip holes 64, ultimately allowing all the anti-slip protrusions 65 to be completely housed inside the anti-slip holes 64 and precisely flush with the opening of the anti-slip holes 64. This restores the complete and smooth arc-shaped structure of the outer wall of the expansion plate 6, providing smooth operating conditions for subsequent pipe fitting disassembly and new pipe fitting insertion and assembly. It avoids the situation where the pipe fitting is not smoothly inserted or removed from the outer wall of the positioning rod 3 due to the scraping of the anti-slip protrusions 65. The present invention effectively improves the anti-slip and anti-dislodgement effect of the pipe fitting when tensioned by the anti-slip protrusions 65 structure that extends and retracts within the anti-slip holes 64 of the arc-shaped outer wall of the expansion plate 6, ensuring cutting accuracy. At the same time, the smooth outer wall after retraction avoids the pipe fitting being scraped and blocked during disassembly and assembly, making the working process more stable.

[0037] Example 6: The expansion plate 6 has an extension groove 68 on its arc-shaped edge; multiple extension strips 71 with the same isosceles trapezoidal cross-section are slidably connected within the extension grooves 68 (the cross-sectional dimensions of the extension grooves 68 increase as they move away from the inclined surface 51, and the extension grooves 68 penetrate the expansion plate 6 on the side facing the inclined surface 51); the two inclined grooves 58 on the inclined surface 51 are distributed in a figure-eight shape and are symmetrically arranged based on the outer wedge groove 52; inclined blocks 72 are slidably connected within the inclined grooves 58; the inclined blocks 72 are fixedly connected to extension strips 71 of different lengths; the arc-shaped edge of the expansion plate 6 has an extension plate 7 fixedly connected to the extension strips 71; the side of the extension plate 7 that contacts the inner wall of the pipe is arc-shaped.

[0038] In this embodiment, the extension strip 71 is elastic and can recover after being bent under pressure. As the receiving plate 5 moves radially away from the positioning rod 3 along the positioning rod 3, the receiving plate 5 will drive the expansion plate 6 and the extension plate 7 to contact the inner wall of the pipe. The reaction force of the expansion plate 6 will cause the outer wedge block 53 to slide along the outer wedge groove 52, so that the two corresponding expansion plates 6 move away from each other. The expansion plate 6 will drive the extension strip 71 in the extension groove 68 to move, so that the inclined block 72 at the end of the extension strip 71 slides along the inclined groove 58. The inclined groove 58 will gradually move away from the outer wedge groove 52, so the extension strip 71 will slide along the extension groove 68 and move away from the outer wedge groove 52. The extension strip 71 will drive the extension plate 7 away from the expansion plate 6. Since the extension strip 71 is elastic, the extension plate 7 can stick to the inner wall of the pipe, thus expanding the support range of the inner wall of the pipe (the support area remains the same but the support range is increased), improving the stability of the inner support of the pipe, and making the pipe cut more stably.

[0039] After the pipe cutting is completed, the receiving plate 5 drives the expansion plate 6 to retract into the receiving groove 31, the outer wedge block 53 slides along the outer wedge groove 52, the front and rear expansion plates 6 will move closer to each other, the expansion plate 6 will drive the inclined block 72 to slide and reset along the inclined groove 58, the inclined block 72 will gradually approach the outer wedge groove 52, so that the extension strip 71 will gradually retract into the extension groove 68, and the extension plate 7 will gradually approach and fit against the expansion plate 6, so that the expansion plate 6 and the extension plate 7 are stacked together.

[0040] Example 7: The inner wall of the annular cutting cylinder 12 is provided with an annular groove 13; the inner wall of the annular groove 13 is provided with an annular toothed groove 14; an outer toothed ring 15 is rotatably connected in the annular toothed groove 14; a gear 16 is meshed and driven by the outer edge of the outer toothed ring 15; the gear 16 is driven by a cutting motor 17; a rotating ring 18 is rotatably connected in the annular groove 13 and fixedly connected to the outer toothed ring 15; a first electric push rod 8 is fixedly connected to the side of the rotating ring 18 facing away from the outer toothed ring 15; the extension and retraction direction of the first electric push rod 8 is radial to the rotating ring 18; a second motor 81 is fixedly connected to the end of the first electric push rod 8; a disc-shaped cutter 82 is fixedly connected to the output end of the second motor 81.

[0041] During the process of cutting the pipe fitting, the cutting motor 17 drives the gear 16 to rotate, the gear 16 drives the external gear ring 15 to rotate, the external gear ring 15 drives the rotating ring 18, the first electric push rod 8, the second motor 81, and the cutter 82 to revolve. At the same time, the second motor 81 rotates and drives the cutter 82 to rotate on its own axis. The first electric push rod 8 will gradually extend, so that the cutter 82 gradually approaches the positioning rod 3 in the state of rotation and revolution, realizing the annular cutting process of the pipe fitting.

[0042] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, a sliding connection means that the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. A sliding fit means that the two parts can slide and separate. In the description of the present invention, a rotating connection means that the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be set in the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixedly connected to the outer wall of the shaft.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal hose processing device, comprising a conveying mechanism and an annular cutting cylinder fixedly connected to a workbench; a track platform is provided on the rear side of the workbench; a track frame is movably connected to the top of the track platform along the track; a positioning rod is fixedly connected to the track frame on the left side; characterized in that: The positioning rod has a uniformly arranged receiving groove along its circumference at the front position of its arc-shaped outer wall; a transmission groove is provided on the inner wall of the receiving groove near the center of the positioning rod; a receiving plate is provided in the receiving groove and can be driven by the transmission component in the transmission groove; the receiving plate can move radially along the positioning rod under the drive of the transmission component; the middle position of the outer side of the receiving plate is recessed, and the end positions are symmetrically provided with plate slopes; the plate slopes are provided with outer wedge grooves; an outer wedge block with the same cross-section of an isosceles trapezoid is slidably connected in the outer wedge groove; the two outer wedge blocks are connected to the inner wall of the outer wedge groove by an outer spring on their opposite sides; an expansion plate is fixedly connected to the side of the outer wedge block away from the receiving plate; the side of the expansion plate away from the receiving plate is arc-shaped and rough; the two expansion plates on the outer side of the receiving plate will move away from each other during the compression process. The transmission assembly includes a connecting rod, a double-acting lead screw, a threaded sleeve, and a rod motor; the positioning rod has a central groove inside; the double-acting lead screw driven by the rod motor is rotatably connected in the central groove; the threaded sleeve is threadedly connected to both ends of the double-acting lead screw; two connecting rods are hinged to each other in the transmission groove; the receiving plate has two parallel inner wedge grooves on the side facing the double-acting lead screw; an inner wedge block with the same isosceles trapezoidal cross-section is slidably connected in the inner wedge groove; one end of the connecting rod is hinged to the inner wedge block, and the other end is hinged to the outer wall of the threaded sleeve; The inner wedge block is connected to the inner wall of the inner wedge groove by an inner spring; the side of the expansion plate facing the receiving plate is in movable contact with the inclined surface of the plate; the expansion plate has an anti-slip groove inside; an anti-slip plate is slidably connected in the anti-slip groove; the side of the anti-slip plate away from the receiving plate is connected to the inner wall of the anti-slip groove by an anti-slip spring; the side of the expansion plate away from the receiving plate has an anti-slip hole communicating with the anti-slip groove; an anti-slip protrusion fixedly connected to the anti-slip plate is movably connected in the anti-slip hole; the side of the expansion plate near the receiving plate has an active groove communicating with the anti-slip groove; an active block fixedly connected to the anti-slip plate is slidably connected in the active groove; the end of the active block extending out of the active groove is arc-shaped; the width of the active block is greater than the width of the outer wedge groove; The expansion plate has an extension groove on its arc-shaped edge; multiple extension grooves are slidably connected to extension strips with the same isosceles trapezoidal cross-section; two inclined grooves on the inclined surface of the plate are distributed in a figure-eight shape and are symmetrically arranged based on the outer wedge groove; inclined blocks are slidably connected to the inclined grooves; the inclined blocks are fixedly connected to extension strips of different lengths; the arc-shaped edge of the expansion plate is provided with an extension plate fixedly connected to the extension strip; the side of the extension plate that contacts the inner wall of the pipe is arc-shaped.

2. The metal hose processing apparatus according to claim 1, characterized in that: The transmission component is a miniature electric push rod; the tail end of the miniature electric push rod is connected to the bottom of the transmission groove, and the other end is fixedly connected to the receiving plate.

3. The metal hose processing apparatus according to claim 1, characterized in that: During the process of the receiving plate contacting the inner wall of the pipe through the expansion plate, a gap is maintained between the inner wall of the pipe and the receiving plate; after the expansion plate retracts radially along the positioning rod, the outer wall of the expansion plate adapts to the arc-shaped outer wall of the positioning rod.

4. The metal hose processing apparatus according to claim 1, characterized in that: All the anti-slip protrusions extend or retract to maintain a consistent length from the anti-slip holes.

5. The metal hose processing apparatus according to claim 1, characterized in that: The extension strip is elastic and can recover its shape after being bent under pressure.

6. The metal hose processing apparatus according to claim 1, characterized in that: The annular cutting cylinder has an annular groove on its inner wall; the annular groove has an annular toothed groove on its inner wall; an outer toothed ring is rotatably connected in the annular toothed groove; a gear is meshed and driven by the outer edge of the outer toothed ring; the gear is driven by a cutting motor; a rotating ring is rotatably connected in the annular groove and fixedly connected to the outer toothed ring; a first electric push rod is fixedly connected to the side of the rotating ring opposite to the outer toothed ring; the extension and retraction direction of the first electric push rod is radial to the rotating ring; a second motor is fixedly connected to the end of the first electric push rod; a disc-shaped cutter is fixedly connected to the output end of the second motor.

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