Automatic hard paper tube sawing and rounding method

Abstract

The invention belongs to the field of transformer manufacturing, and relates to an automatic hard paper tube sawing and rounding method which comprises the steps that a rubber roller set for driving a hard paper tube to rotate, a rubber roller set supporting mechanism and a rubber roller driving table are manufactured, the rubber roller set comprises a fixed rubber roller and two movable rubber rollers which are horizontally arranged, and the two movable rubber rollers are the same in height and can synchronously and horizontally move; the fixed rubber roller is lower than the movable rubber roller; the manufacturing and machining mechanism comprises a box body, a machining mechanism shaft and a tool bit, and the tool bit comprises a disk saw and a rounding tool bit; a hard paper tube is placed on a rubber roller set, so that the outer side face of the hard paper tube is attached to the rubber roller set, a disk saw is installed on a machining mechanism shaft, the rubber roller set drives the hard paper tube to rotate slowly, saw cutting is completed after the hard paper tube rotates by a circle, the disk saw is replaced with a rounding tool bit, and the rounding tool bit begins to conduct rounding while the hard paper tube rotates. And the hard paper tube is rotated by one circle and then is chamfered. The sawing and rounding machine is high in sawing and rounding precision, and the working efficiency can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of power transformer component manufacturing, and specifically relates to a method for automatically sawing and rounding the corners of cardboard tubes used in the production of power transformer coils. Background Technology

[0002] Transformer coils are usually supported and fixed by cardboard tubes. In order to ensure that the size and quality of the coils meet the requirements, the size control of the cardboard tubes is also very important.

[0003] Large coils typically use cardboard tubes with a diameter of over 1 meter and a height that can reach several meters. The height of the cardboard tube is generally slightly greater than the designed coil height. When winding the coil, one end of the cardboard tube needs to be sawn to the designed coil height. Currently, there is no mechanized equipment for sawing and chamfering cardboard tubes. In the coil production process, the height line for the sawing position is usually drawn manually on the cardboard tube according to the designed height dimensions on the coil drawing, plus a margin. A handheld circular saw is then used to cut along the height line, followed by fine-tuning with an electric planer to reach the height required by the drawing. A handheld chamfering machine is then used to chamfer the inner and outer sides of the planed end of the cardboard tube according to the drawing, and it is sanded smooth. Finally, a vacuum cleaner is used to clean up the dust generated during sawing and chamfering. This method is time-consuming and labor-intensive, and there is a certain degree of human error involved. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method for automatically sawing and rounding the corners of cardboard tubes used in the production of large power transformer coils, thereby automatically sawing and rounding the corners of the cardboard tubes. The technical solution adopted by this invention is as follows: A method for automatically sawing and rounding corners of cardboard tubes utilizes a control system to control the rotation of the cardboard tubes and to automatically complete the sawing and rounding corner processes. The method includes the following steps: This invention relates to a system for manufacturing a set of rubber rollers, a support mechanism for the rubber roller set, and a driving platform for the rubber roller set. The driving platform includes a housing and a transmission mechanism. The support mechanism for the rubber roller set includes a front support mechanism and a rear support mechanism. The front support mechanism is installed on the front upper side of the lower frame. The lower frame is a flat plate structure. The housing of the driving platform and the housing of the processing mechanism are fixedly connected to the front and rear ends of the lower frame, respectively. The front end of the rubber roller set is rotatably mounted on the front support mechanism, and the rear end of the rubber roller set is rotatably mounted on the rear support mechanism. The transmission mechanism and the rear support mechanism are installed inside the housing. The rubber roller set includes one fixed rubber roller and two movable rubber rollers arranged horizontally in the same direction. The two movable rubber rollers are located on the left and right sides of the fixed rubber roller, respectively. The two movable rubber rollers are at the same height and can move horizontally synchronously. The fixed rubber roller is lower than the movable rubber roller. The transmission mechanism is rotatably connected to the fixed rubber roller and the movable rubber rollers, and the control system is electrically connected to the transmission mechanism. A processing mechanism is manufactured, including a housing, a processing mechanism shaft, and a cutting head. The housing has a rectangular structure with a vertical rectangular slot in the middle of the front side. The processing mechanism shaft is an L-shaped piece welded from horizontal and vertical square tubes. The lower end of the vertical tube section is connected to the lower edge of the slot in the housing via a rotating shaft. One end of the horizontal tube section is welded perpendicularly to the vertical tube section, and the other end of the horizontal tube section is connected to the cutting head via a detachable connection mechanism. The control system is electrically connected to the cutting head. The cutting head includes a circular saw and a rounded corner cutting head. Rotate the processing mechanism outward, manually place the cardboard tube onto the rubber roller assembly, start the transmission mechanism to adjust the horizontal position of a pair of movable rubber rollers so that the outer side of the cardboard tube is in contact with both the fixed rubber roller and the pair of movable rollers, and adjust the position of the cardboard tube so that the target sawing position is directly below the cutter head. Install the circular saw onto the processing mechanism shaft, rotate the processing mechanism shaft inward so that the circular saw is aligned with the target sawing position of the cardboard tube, start the transmission mechanism and the circular saw, the cardboard tube starts to rotate and the circular saw starts to saw, the sawing is completed after the cardboard tube has rotated one revolution, and then turn off the transmission mechanism and the circular saw. Rotate the processing mechanism outward along the axis, replace the circular saw with a rounded corner cutter, and rotate the processing mechanism inward along the axis so that the rounded corner cutter fits against the edge of the cardboard tube. Start the transmission mechanism and the rounded corner cutter. The cardboard tube starts to rotate and the rounded corner cutter starts to round the corners. The rounding is completed after the cardboard tube rotates one revolution. Then, turn off the transmission mechanism and the rounded corner cutter.

[0005] Preferably, the movable rubber roller includes a rubber roller core and a rubber layer fixedly disposed on the outer periphery of the rubber roller core. The rear end of the rubber roller core has no rubber layer, and a rear bearing is fixedly installed on the outer periphery of the rear end. A double-row sprocket is installed on the outer periphery of the rubber roller core between the rear bearing and the rear end of the rubber layer. The rubber layer at the front end of the rubber roller core is divided into two sections, and a front bearing is fixedly installed on the outer periphery of the rubber roller core between the two sections. The fixed rubber roller includes a second rubber roller core and a rubber layer fixedly disposed on the outer periphery of the second rubber roller core. The second rubber roller core is shorter than the first rubber roller core. The rear end of the second rubber roller core has no rubber layer and a rear bearing is fixedly installed on its outer periphery. A double-row sprocket is installed on the outer periphery of the second rubber roller core between the rear bearing and the rear end of the rubber layer. The front end of the second rubber roller core has no rubber layer and a front bearing is fixedly installed on its outer periphery.

[0006] Preferably, the front rubber roller assembly support mechanism includes a front fixed rubber roller seat, two front movable rubber roller seats, a front lead screw mechanism, and a first reduction motor; the front lead screw mechanism is fixedly installed on the front end of the lower frame side; the front movable rubber roller seat includes a first bearing seat, which is welded to a second support column, and the second support column is welded to a slider, with internal threaded holes of opposite directions opened at the center positions of the two sliders; the front lead screw mechanism includes a first bidirectional lead screw and a slide groove, the left and right threads of the first bidirectional lead screw respectively mate with the internal threaded holes of the two sliders, and the two sliders mate with the slide groove; the first reduction motor is fixedly installed on one side of the front lead screw mechanism, and the shaft of the first reduction motor is fixedly connected to one end of the first bidirectional lead screw, and the shaft of the first reduction motor drives the first bidirectional lead screw to rotate; the front fixed rubber roller seat includes a second bearing seat and a second support column, the second bearing seat is welded to the second support column, and the second support column is welded to the upper surface of the lower frame behind the front lead screw mechanism.

[0007] Preferably, the rear rubber roller assembly support mechanism includes a rear fixed rubber roller seat, two rear movable rubber roller seats, a rear lead screw mechanism, and a second reduction motor. The rubber roller drive platform includes a cuboid shell with an elongated opening at the upper part of the front side and a circular opening at the middle of the lower part of the front side. The rubber roller drive platform also includes a sprocket motor. The rear fixed rubber roller seat is welded inside the rubber roller drive platform shell. The rear lead screw mechanism is fixedly installed inside the rubber roller drive platform shell. The second reduction motor is located at one end of the rear lead screw mechanism. The shaft of the second reduction motor is fixedly connected to the double-direction lead screw of the rear lead screw mechanism. The rear movable rubber roller seat is threadedly installed on the double-direction lead screw. The sprocket motor is fixedly installed on one side of the inner wall of the rubber roller drive platform shell. Three chains are sequentially wound around the shaft of the sprocket motor, the double-row sprockets of the two movable rubber rollers, and the double-row sprockets of the fixed rubber roller.

[0008] Preferably, two symmetrical limiting frames are provided on the left and right sides of the lower frame. Each limiting frame includes a horizontal support arm. One end of the horizontal support arm is welded to the lower frame, and the other end of the horizontal support arm is connected to one end of a rotating arm through a rotary locking device. A limiting roller is fixedly installed on the other end of the rotating arm. Before placing the cardboard tube, the rotating arm of the limiting frame is rotated outward to avoid the cardboard tube. After placing the cardboard tube, the rotating arm of the limiting frame is rotated inward to make the limiting roller close to the outer side of the cardboard tube. Then, the rotary locking device of the limiting frame is adjusted and locked.

[0009] Preferably, two parallel baffle grooves are opened on the upper side of the lower frame along its length. The lower end of the inverted U-shaped positioning reference baffle is movably installed on the lower frame through the baffle groove. The fixed rubber roller passes through the opening of the positioning reference baffle. A scale is fixedly installed on one side of the upper surface of the lower frame, and the zero mark of the scale is aligned with the position of the cutter head. Before placing the cardboard tube, the positioning reference baffle is moved to the corresponding position according to the scale. The positioning reference baffle is used as a reference for placing the cardboard tube. After the cardboard tube is placed in place, the positioning reference baffle is released and moved back to ensure that the positioning reference baffle does not affect the rotation of the cardboard tube.

[0010] The beneficial effects of this invention are: This automatic sawing and rounding method for cardboard tubes can be operated independently by one person. The sawing and rounding are highly accurate, which can effectively improve work efficiency and has broad application prospects. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of the cardboard tube processing equipment according to an embodiment of the present invention; Figure 2 This is an overall structural diagram of the present invention after the cardboard tube has been placed; Figure 3 This is a schematic diagram of the structure of the rear end of the movable rubber roller according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the front end of the movable rubber roller according to an embodiment of the present invention; Figure 5 This is a front view of the front movable rubber roller seat and the front lead screw mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the lead screw and the slider according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the rubber roller drive table according to an embodiment of the present invention; Figure 8 This is a schematic diagram showing the connection between the sprocket motor and the double-row sprocket according to an embodiment of the present invention; Among them, 1 is a fixed rubber roller, 2 is a movable rubber roller, 21 is a rubber roller core, 22 is a rear bearing, 23 is a double-row sprocket, 24 is a rubber layer, 25 is a front bearing, 26 is a chain, 27 is a double-row sprocket, 3 is a rubber roller drive platform, 31 is a sprocket motor, 32 is a rear lead screw mechanism, 33 is a rear movable rubber roller seat, 34 is a rear fixed rubber roller seat, 35 is a geared motor, 4 is a front movable rubber roller seat, 41 is a bearing seat, 42 is a support column, 43 is a slider, 5 is a front lead screw mechanism, 51 is a bidirectional lead screw, 52 is a slide groove, 53 is a geared motor, 6 is a limit frame, 7 is a front fixed rubber roller seat, 8 is a processing mechanism, 81 is a processing mechanism shaft, 82 is a circular saw, 9 is an electrical box, 10 is an operation panel, 11 is a lower frame, 12 is a scale, 13 is a positioning reference baffle, and 14 is a cardboard tube. Detailed Implementation

[0012] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0013] This invention enables one person to perform sawing and rounding operations on the cardboard tube 14 by rationally arranging the sawing and rounding corner processing mechanisms of the cardboard tube 14 and the rotation power mechanism of the cardboard tube 14.

[0014] like Figure 1-8 As shown, the method for automatically sawing and rounding the corners of cardboard tubes utilizes a control system to control the rotation of the cardboard tube 14, and the control system also controls the processing mechanism 8 to automatically complete the sawing and rounding processes of the cardboard tube 14. The method includes the following steps: Fabricate a rubber roller assembly, a rubber roller assembly support mechanism, and a rubber roller drive table 3 for driving the rotation of the cardboard tube 14.

[0015] The rubber roller assembly includes a fixed rubber roller 1 and two movable rubber rollers 2 arranged horizontally in the same direction. The two movable rubber rollers 2 are located on the left and right sides of the fixed rubber roller 1, respectively, and are at the same height. The upper horizontal cross-section of the fixed rubber roller 1 is lower than the upper horizontal cross-section of the movable rubber roller 2. The rubber roller drive platform 3 is installed at the rear end of the processing equipment. The two ends of the fixed rubber roller 1 are rotatably mounted on the rubber roller drive platform 3 and the front fixed rubber roller seat 7, respectively. The two ends of the movable rubber roller 2 are rotatably mounted on the rubber roller drive platform 3 and the front movable rubber roller seat 4, respectively. The front movable rubber roller seat 4 is movably mounted on the front lead screw mechanism 5.

[0016] The movable rubber roller 2 includes a rubber roller core 21 and a rubber layer 24 fixedly disposed on the outer periphery of the rubber roller core 21. A certain length of the rear end of the rubber roller core 21 is reserved without the rubber layer 24. A rear bearing 22 is fixedly installed on the outer periphery of the reserved length of the rubber roller core 21 without the rubber layer 24. A double-row sprocket 23 is installed on the outer periphery of the rubber roller core 21 between the rear bearing 22 and the rear end of the rubber layer 24. The rubber layer 24 at the front end of the rubber roller core 21 is divided into two sections. A front bearing 25 is fixedly installed on the outer periphery of the rubber roller core 21 between the two sections of the rubber layer 24. The fixed rubber roller 1 includes a second rubber roller core, a second rubber layer, a second front bearing, a second rear bearing, and a second double-row sprocket 27. The second rubber roller core is slightly shorter than the first rubber roller core 21. A section of the front end of the second rubber roller core has no rubber layer. A second front bearing is fixedly installed on the outer periphery of a section of the front end of the second rubber roller core. The other structures of the fixed rubber roller are the same as those of the movable rubber roller, and will not be described in detail here. The front end of the movable rubber roller 2 is rotatably mounted on the front movable rubber roller seat 4 via the front bearing 25. The rear end of the movable rubber roller 2 passes through the rectangular opening at the upper front side of the rubber roller drive platform 3 and is rotatably mounted on the rear movable rubber roller seat 33 inside the rubber roller drive platform 3 via the rear bearing 22. The front end of the fixed rubber roller 1 is rotatably mounted on the front fixed rubber roller seat 7 via the front bearing 2. The rear end of the fixed rubber roller 1 passes through the circular opening at the center front side of the rubber roller drive platform 3 and is rotatably mounted on the rear fixed rubber roller seat 34 inside the rubber roller drive platform 3 via the rear bearing 2.

[0017] The front movable rubber roller seat 4 includes a bearing seat 41, which is welded to a support column 42. The support column 42 is welded to a slider 43, and an internal threaded hole is formed at the center of the slider 43. The front lead screw mechanism 5 includes a bidirectional lead screw 51 and a groove 52. The left half of the bidirectional lead screw 51 has a left-hand thread, and the right half has a right-hand thread. The thread of the bidirectional lead screw 51 mates with the internal threaded hole on the slider 43. The two front movable rubber roller seats 4 are mounted on the front lead screw mechanism 5, one on the left and one on the right, in symmetrical positions. The upper middle part of the front fixed rubber roller seat 7 has the same structure as the front movable rubber roller seat 4, including a bearing seat and a support column. The lower end of the support column of the front fixed rubber roller seat 7 is fixedly welded to the lower frame 11. A geared motor 53 is fixedly mounted on one side of the front lead screw mechanism 5. The shaft of the geared motor 53 is fixedly connected to one end of the bidirectional lead screw 51, and the shaft of the geared motor 53 drives the bidirectional lead screw 51 to rotate. When the bidirectional lead screw 51 rotates, it drives the slider 43 to move, so that the two front movable rubber roller seats 4 on the left and right can move synchronously to the middle or both sides.

[0018] The rubber roller drive platform 3 includes a housing and an internal mechanism. The housing is a cuboid structure with an elongated opening at the upper part of the front side, the width of which is slightly larger than the diameter of the movable rubber roller 2. A circular opening is located at the lower center of the front side of the housing, the diameter of which is slightly larger than the diameter of the fixed rubber roller 1. The internal mechanism of the rubber roller drive platform 3 includes a sprocket motor 31, a rear lead screw mechanism 32, a rear movable rubber roller seat 33, a rear fixed rubber roller seat 34, and a second reduction motor 35, which is located at one end of the rear lead screw mechanism 32. The sprocket motor 31 is fixedly installed on one side of the inner wall of the rubber roller drive platform 3 housing and is controlled by a control system within the electrical box 9. The rear lead screw mechanism 32 is fixedly installed inside the rubber roller drive platform 3 housing, and its specific structure is identical to that of the front lead screw mechanism 5. The structure of the rear movable rubber roller seat 33 is identical to that of the front movable rubber roller seat 4, and the rear movable rubber roller seat 33 is threadedly mounted on the rear lead screw mechanism 32. The rear fixed rubber roller seat 34 is identical to the front fixed rubber roller seat 7, and is welded inside the housing of the rubber roller drive platform 3. The geared motor 35 on the rear lead screw mechanism 32 and the geared motor 53 on the front lead screw mechanism 5 are both controlled by the control system inside the electrical box 9 and operate synchronously, enabling the movable rubber rollers 2 to move synchronously to the center or sides while remaining parallel. Three chains 26 are used to connect the shaft of the sprocket motor 31, the double-row sprockets 23 on the two movable rubber rollers 2, and the double-row sprockets 27 on the fixed rubber roller 1, achieving synchronous rotation of three rubber rollers driven by one sprocket motor 31. The rear side of the housing is a removable steel plate, facilitating the disassembly and assembly of the chains 26 or the maintenance of the internal mechanisms of the rubber roller drive platform 3 after opening the steel plate.

[0019] The processing mechanism 8 is installed in front of the front lead screw mechanism 5, and the electrical box 9 is installed on the left side of the processing mechanism 8. The control system is installed inside the electrical box 9, and the operation panel 10 is installed above the electrical box 9. The control system is electrically connected to the operation panel 10. A lower frame 11 with a flat plate structure is installed horizontally below the fixed rubber roller 1. The lower frame 11 is located between the rubber roller drive table 3 and the adjacent side of the processing mechanism 8. The lower part of the front fixed rubber roller seat 7 and the lower part of the front lead screw mechanism 5 are fixedly installed on the lower frame 11. The upper horizontal cross-section of the cylindrical fixed rubber roller 1 is higher than the upper side of the housing of the front lead screw mechanism 5 and the processing mechanism 8.

[0020] The machining mechanism 8 includes a housing, a machining mechanism shaft 81, and a cutter head. The housing also includes a drive power supply that drives the cutter head to rotate. The housing is a cuboid structure with a step along the upper edge of the front side and a vertical rectangular slot in the middle of the front side. The machining mechanism shaft 81 is an L-shaped piece formed by welding two square tubes (a horizontal section and a vertical section). The lower end of the vertical section of the machining mechanism shaft 81 is connected to the housing via a pivot, located at the lower edge of the rectangular slot on the front side. The machining mechanism shaft 81 can rotate around the pivot, allowing the horizontal section of the shaft to be raised or lowered. One end of the horizontal section of the machining mechanism shaft 81 is welded perpendicularly to the vertical section, and the other end is connected to the cutter head via a detachable fixed connection mechanism. The cutter head is rotatably mounted in the fixed connection mechanism. The control system is electrically connected to the cutter head, which includes a circular saw 82 and a rounded-corner cutter head.

[0021] The control system is a common electrical device, including an electrical box 9 and a control mechanism (such as a programmable logic controller) inside the electrical box 9. The control mechanism is electrically connected to the operation panel 10, the sprocket motor 31, the geared motor 53, and the geared motor 35. The operation panel 10 is equipped with multiple buttons for operating and controlling the rotation or stopping of the rubber roller, the rotation or stopping of the circular saw 82, and the inward or outward movement of the two movable rubber rollers 2.

[0022] Before placing the cardboard tube 14, the steel plate is usually removed to open the roller drive platform 3. The three chains 26 inside the roller drive platform 3 are then removed to adjust the spacing of the movable rollers 2. Based on the diameter of the cardboard tube 14 to be processed, the geared motors 53 and 35 are activated via the buttons on the operation panel 10 to adjust the spacing of the two movable rollers 2 until all three rollers are in contact with the cardboard tube 14. After determining the position of the movable rollers 2, the required chain length is determined based on parameters such as the center distance and diameter between the double-row sprockets. Since the diameter of the cardboard tube 14 is usually only a few fixed sizes, the spacing of the movable rollers 2 does not need to be adjusted every time.

[0023] Rotate the processing mechanism shaft 81 outward, manually place the cardboard tube 14 onto the rubber roller assembly, start the transmission mechanism to adjust the horizontal position of the pair of movable rubber rollers 2 so that the outer side of the cardboard tube 14 is in contact with the fixed rubber roller 1 and the pair of movable rubber rollers 2, adjust the position of the cardboard tube 14 so that the target sawing position is directly below the cutter head; install a suitable chain 26 to connect the shaft of the sprocket motor 31, the double-row sprocket 23 of the two movable rubber rollers 2 and the double-row sprocket 27 of the fixed rubber roller 1.

[0024] Install the circular saw 82 onto the processing mechanism shaft 81, rotate the processing mechanism shaft 81 inward so that the circular saw 82 is aligned with the target sawing position of the cardboard tube 14, start the transmission mechanism and the circular saw 82, the cardboard tube 14 begins to rotate and the circular saw 82 begins to saw, the sawing is completed after the cardboard tube 14 has rotated one revolution, and then turn off the transmission mechanism and the circular saw 82.

[0025] Rotate the processing mechanism shaft 81 outward to lift the circular saw 82, replace the circular saw 82 with a rounded corner cutter head, rotate the processing mechanism shaft 81 inward back to its original position so that the rounded corner cutter head fits against the end edge of the cardboard tube 14, start the transmission mechanism and the rounded corner cutter head, the cardboard tube 14 starts to rotate and the rounded corner cutter head starts to round the corners, the rounded corners are completed after the cardboard tube 14 rotates one revolution, and then turn off the transmission mechanism and the rounded corner cutter head.

[0026] As a further preferred embodiment, it also includes two pairs of limiting frames 6 symmetrically installed on the outside of the two movable rubber rollers 2. Each limiting frame 6 includes a horizontal support arm, a rotating arm, and a rotating locking device. One end of the horizontal support arm is welded to the lower frame 11, and the other end is connected to one end of the rotating arm via the rotating locking device. A limiting roller is fixedly installed on the other end of the rotating arm. Two symmetrical limiting frames 6 are provided on each of the left and right sides of the lower frame 11. Before placing the cardboard tube 14, the rotating arm of the limiting frame 6 is rotated outward to prevent the cardboard tube 14 from being placed. After the cardboard tube 14 is placed in the sawing position, the rotating arm of the limiting frame 6 is manually rotated until the limiting roller is clamped to the cardboard tube 14. Then, the rotating locking device is fully locked to limit the rotation of the cardboard tube 14 and prevent it from sliding or misaligning. The rotating locking device can specifically use an existing rotating shaft connection with bolt locking. Finally, after the sawing and rounding of the cardboard tube 14 are completed, the limit frame 6 is released, and the processed cardboard tube 14 is transported away by a crane operated manually.

[0027] As a further preferred embodiment, a ruler 12 and a positioning reference baffle 13 are also included. A ruler 12 is provided on the upper surface of one side of the lower frame 11, with the zero mark of the ruler 12 aligned with the position of the circular saw 82. The inverted U-shaped positioning reference baffle 13 is movably mounted on the lower frame 11, with the fixed rubber roller 1 passing through the opening of the positioning reference baffle 13. Parallel baffle grooves are provided along the length of the upper side of the lower frame 11. The lower end of the inverted U-shaped positioning reference baffle 13 is movably mounted on the lower frame 11 through the baffle grooves. The positioning reference baffle 13 can slide back and forth along the baffle grooves and lock at a selected position according to the required cutting height of the cardboard tube 14. The locking mechanism is existing technology. Before placing the cardboard tube 14, move the positioning reference baffle 13 to the corresponding position according to the scale of the ruler 12. The positioning reference baffle 13 is used as a reference for placing the cardboard tube 14. After the cardboard tube 14 is placed in place, release the positioning reference baffle 13 and move it back to ensure that the positioning reference baffle 13 does not affect the rotation of the cardboard tube 14.

[0028] In the embodiments of the present invention, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0029] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A method for automatically sawing and chamfering a cardboard tube, wherein a control system is used to control the rotation of a cardboard tube (14), and a processing mechanism (8) is controlled by the control system to automatically complete the sawing and chamfering process of the cardboard tube (14), wherein: The following steps are involved: A rubber roller group, a rubber roller group support mechanism and a rubber roller driving platform (3) for driving a cardboard tube (14) to rotate are manufactured. The rubber roller driving platform (3) comprises a shell and a transmission mechanism. The rubber roller group support mechanism comprises a front rubber roller group support mechanism and a rear rubber roller group support mechanism. The front rubber roller group support mechanism is mounted on the front part of the upper side of a lower frame (11). The lower frame (11) is a flat plate structure. The front and rear ends of the lower frame (11) are respectively fixedly connected to the shell of the rubber roller driving platform (3) and the box body of the processing mechanism (8). The front end of the rubber roller group is rotatably mounted on the front rubber roller group support mechanism. The rear end of the rubber roller group is rotatably mounted on a rear rubber roller group support mechanism, and the transmission mechanism and the rear rubber roller group support mechanism are mounted in a housing, the rubber roller group comprises a fixed rubber roller (1) and two movable rubber rollers (2) arranged horizontally in the same direction, the two movable rubber rollers (2) are respectively located on the left and right sides of the fixed rubber roller (1), the two movable rubber rollers (2) are at the same height and can move horizontally synchronously, and the fixed rubber roller (1) is lower than the movable rubber rollers (2); the transmission mechanism is rotatably connected to the fixed rubber roller (1) and the movable rubber roller (2), and the control system is electrically connected to the transmission mechanism; A processing mechanism (8) is manufactured, comprising a box, a processing mechanism shaft (81) and a cutter head, wherein the box is a rectangular parallelepiped structure, and a vertical rectangular slot is provided in the middle of the front side of the box; the processing mechanism shaft (81) is an L-shaped member formed by welding a horizontal square tube and a vertical square tube, the lower end of the vertical tube section is connected to the lower edge of the slot of the box through a rotating shaft, one end of the horizontal tube section is vertically welded to the vertical tube section, and the other end of the horizontal tube section is connected to the cutter head through a detachable connecting mechanism, and the control system is electrically connected to the cutter head, and the cutter head comprises a circular saw (82) and a chamfered cutter head; The processing mechanism shaft (81) is rotated outward, and the cardboard tube (14) is manually placed on the rubber roller group, and the transmission mechanism is started to adjust the horizontal position of the pair of movable rubber rollers (2) so that the outer side of the cardboard tube (14) is in contact with the fixed rubber roller (1) and the pair of movable rubber rollers (2), and the position of the cardboard tube (14) is adjusted so that the target sawing position is located directly below the cutter head; The circular saw (82) is mounted on the processing mechanism shaft (81), and the processing mechanism shaft (81) is rotated inwardly so that the circular saw (82) is aligned with the target sawing position of the cardboard tube (14), and the transmission mechanism and the circular saw (82) are started, and the cardboard tube (14) starts to rotate and the circular saw (82) starts to saw, and the cardboard tube (14) is rotated once and the sawing is completed, and the transmission mechanism and the circular saw (82) are closed; The processing mechanism shaft (81) is rotated outward, the circular saw (82) is replaced with a chamfering cutter head, the processing mechanism shaft (81) is rotated inward, so that the chamfering cutter head fits the end edge of the cardboard tube (14), the transmission mechanism and the chamfering cutter head are started, the cardboard tube (14) starts to rotate and the chamfering cutter head starts to chamfer, the chamfering is completed after the cardboard tube (14) rotates one circle, and the transmission mechanism and the chamfering cutter head are closed.

2. The method for automatic sawing and chamfering of cardboard tubes according to claim 1, characterized in that: The movable rubber roller (2) comprises a rubber roller core (21) and a rubber layer (24) fixedly arranged on the outer periphery of the rubber roller core (21); a section of the outer periphery of the rear end of the rubber roller core (21) is free of the rubber layer (24); a section of the outer periphery of the rear end of the rubber roller core (21) is fixedly mounted with a rear bearing (22); a double-row sprocket (23) is mounted on the outer periphery of the rubber roller core (21) between the rear bearing (22) and the rear end of the rubber layer (24); the rubber layer (24) at the front end of the rubber roller core (21) is divided into two sections, the two sections A front bearing (25) is fixedly installed on the outer periphery of a rubber roller core (21) between a section of a rubber layer (24); the fixed rubber roller (1) comprises a rubber roller core (2) and a rubber layer (2) fixedly arranged on the outer periphery of the rubber roller core (2); the rubber roller core (2) is shorter than the rubber roller core (21); a section of the outer periphery of the rear end of the rubber roller core (2) is free of the rubber layer (2) and is fixedly installed with the rear bearing (2); a double-row sprocket (27) is installed on the outer periphery of the rubber roller core (2) between the rear bearing (2) and the rear end of the rubber layer (2); the front end of the rubber roller core (2) is free of the rubber layer (2) and is fixedly installed with the front bearing (2) on the outer periphery.

3. The method for automatic sawing and chamfering of cardboard tubes according to claim 2, characterized in that: The front rubber roller group support mechanism comprises a front fixed rubber roller seat (7), two front movable rubber roller seats (4), a front screw mechanism (5) and a reduction motor (53); the front screw mechanism (5) is fixedly mounted on the front end of the upper side of the lower frame (11); the front movable rubber roller seat (4) comprises a bearing seat (41), the bearing seat (41) is welded to a support column (42), the support column (42) is welded to a slider (43), and the two sliders (43) are provided with internal threaded holes with opposite rotation directions at the center positions; the front screw mechanism (5) comprises a bidirectional screw ( The front fixed rubber roller seat (7) comprises a bearing seat 2 and a support column 2, the bearing seat 2 is welded to the support column 2, and the support column 2 is welded to the upper surface of the lower frame (11) behind the front screw mechanism (5).

4. The method for automatic sawing and chamfering of cardboard tubes according to claim 3, characterized in that: The rear rubber roller group support mechanism comprises a rear fixed rubber roller seat (34), two rear movable rubber roller seats (33), a rear screw mechanism (32) and a second reduction motor (35); the rubber roller drive platform (3) comprises a rectangular parallelepiped shell, a long strip-shaped opening is opened at the upper part of the front side of the shell, and a circular opening is opened in the middle of the lower part of the front side of the shell; the rubber roller drive platform (3) also comprises a sprocket motor; the rear fixed rubber roller seat (34) is welded in the shell of the rubber roller drive platform (3); the rear screw mechanism (32) is fixedly installed in the shell of the rubber roller drive platform (3) The second reduction motor (35) is arranged at one end of the rear screw mechanism (32), the rotating shaft of the second reduction motor (35) is fixedly connected to the bidirectional screw rod 2 of the rear screw mechanism (32), the rear movable rubber roller seat (33) is threadedly mounted on the bidirectional screw rod 2, and the sprocket motor (31) is fixedly mounted on one side of the inner wall of the outer shell of the rubber roller driving platform (3); three chains (26) are wound around the rotating shaft of the sprocket motor (31), the double-row sprockets 1 (23) of the two movable rubber rollers (2) and the double-row sprockets 2 (27) of the fixed rubber roller (1) one by one.

5. The method for automatic sawing and chamfering of cardboard tubes according to claim 1, characterized in that: Two symmetrical limit frames (6) are respectively arranged on the left and right sides of the lower frame (11), and the limit frame (6) comprises a horizontal support arm, one end of the horizontal support arm is welded to the lower frame (11), the other end of the horizontal support arm is connected to one end of the rotating arm through a rotating locking device, and the other end of the rotating arm is fixedly installed with a limit roller; before placing the cardboard tube (14), the rotating arm of the limit frame (6) is rotated outward to avoid the cardboard tube (14); after placing the cardboard tube (14), the rotating arm of the limit frame (6) is rotated inward to make the limit roller close to the outer side of the cardboard tube (14), and then the rotating locking device of the limit frame (6) is adjusted and locked.

6. The method for automatic sawing and chamfering of cardboard tubes according to claim 5, characterized in that: Two parallel baffle grooves are respectively opened in the length direction of the upper side surface of the lower frame (11), and the lower end of the inverted U-shaped positioning reference baffle (13) is movably installed on the lower frame (11) through the baffle groove; the fixed rubber roller (1) passes through the opening of the positioning reference baffle (13); a ruler (12) is fixedly provided on one side of the upper surface of the lower frame (11), and the zero scale position of the ruler (12) is aligned with the position of the cutter head; before placing the cardboard tube (14), the positioning reference baffle (13) is moved to a corresponding position in accordance with the scale of the ruler (12), and the positioning reference baffle (13) is used as a reference positioning when placing the cardboard tube (14). When the cardboard tube (14) is placed in place, the positioning reference baffle (13) is loosened and moved back to ensure that the positioning reference baffle (13) does not affect the rotation of the cardboard tube (14).

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