Automatic tube feeding device and laser tube cutting machine

Abstract

The present invention discloses an automatic tube feeding device and a laser tube cutting machine, which comprises a material storage rack, in which a plurality of ejector rods are arranged; two groups of lifting mechanisms: a first group of lifting mechanisms and a second group of lifting mechanisms, which can respectively drive the two ends of the ejector rods to lift and lower, and adjust the heights of the two ends of the ejector rods, so that the height and the inclination angle of the ejector rods can be adjusted, so that the tubes in the material storage rack can automatically fall into the feeding channel under the action of their own gravity; a temporary storage rack, which is connected to the side of the material storage rack located at the feeding port, and has a temporary storage plane on the top, and the temporary storage plane is connected to the feeding channel, so as to carry the tubes falling from the feeding channel; a conveying mechanism, which is arranged on one side of the temporary storage rack, and is used to receive the tubes ejected by the ejection mechanism on the temporary storage plane. The automatic tube feeding device and the laser tube cutting machine have a fast tube lifting speed, high feeding efficiency, and can adjust the inclination of the tubes when feeding according to the outer diameter of the tubes, and will not cause damage to the end faces of the tubes.

Description

Technical Field

[0001] The invention relates to the technical field of automated laser tube cutting equipment, in particular to an automatic tube feeding device and a laser tube cutting machine. Background Art

[0002] Laser tube cutting machines are mainly used for cutting metal tubes. They have the advantages of high cutting accuracy, fast cutting, smooth incision, and low processing cost. Therefore, laser tube cutting machines have been widely used in industry. In order to improve the cutting efficiency of laser tube cutting machines, existing laser tube cutting machines are equipped with tube feeding devices. The automation and efficiency of tube feeding devices are one of the key factors to improve the cutting efficiency of laser tube cutting machines.

[0003] At present, the feeding device of the laser tube cutting machine is composed of a feeding device and a conveying mechanism, wherein the feeding device needs to convey the neatly arranged tubes in the material box to the conveying mechanism, and the conveying mechanism conveys the tubes to be cut one by one to the cutting station of the laser tube cutting machine for laser cutting. For example, the patent application with the publication number CN114473235A and the name of a precision thin-walled tube laser cutting system capable of automatic loading and unloading, which is wound on the winding wheel by a tension belt, lifts the thin-walled tube on the tension belt to the upper end surface of the feeding plate, and slides to the front end of the feeding plate. At this time, the feeding electric control cabinet detects the precision tube signal and then controls the lifting material to drive the material distribution shaft to rise, and then drives the lifting material assembly on the material distribution shaft to rise. The lifting material assembly lifts a thin-walled tube out of the blocking block and then descends, and then the thin-walled tube slides along the sliding plate to the lifting plate of the lifting frame, and the lifting cylinder drives the lifting plate to descend, and finally the thin-walled tube is placed on the V-shaped roller, and then the thin-walled tube is pushed into the positioning guide device by the lifting cylinder. Another example is the patent application with publication number CN210387979U, entitled "An automatic feeding tube laser cutting device", which lifts the tube for feeding by tensioning the lifting belt. The feeding devices of the laser tube cutting machines in the prior art all realize the feeding of the tube in the storage rack by winding or rising one end of the tensioning belt or lifting belt, that is, one end of the tensioning belt or lifting belt is fixed, and the other end is wound or raised to lift the tube in the tensioning belt. When one end of the tensioning belt is wound or raised, it will inevitably cause the tube on the tensioning belt to collide or roll in the storage rack, resulting in a slow lifting speed of the tube and low feeding efficiency. Another example is the patent application with publication number CN210451419U, entitled "A steel pipe cutting device with automatic loading and unloading". When feeding, several steel pipes are placed in a storage trough, and then cylinder 2 drives the discharging rod to tilt upward, and cylinder 1 drives the crossbeam to rise, thereby raising the second supporting plate, and one of the steel pipes to be processed is lifted up by the second supporting plate for feeding; the steel pipe in the storage trough is lifted up by cylinder 2 driving the discharging rod to tilt upward, that is, one end of the discharging rod rotates upward around the other end, thereby moving the steel pipe in the second supporting direction, and then cylinder 1 drives the second supporting plate to lift the steel pipe upward for feeding, and its feeding efficiency is low; furthermore, the above-mentioned feeding device of the prior art cannot adjust the inclination of the pipe fittings when feeding according to the outer diameter size of the pipe fittings, and its application range is relatively narrow.

[0004] In addition, the conveying device of the feeding device of the laser tube cutting machine in the prior art is arranged on one side of the feeding device for receiving the tube sliding down from the feeding device. For example, in the patent applications with publication numbers CN210387979U and CN213105125U, the conveying device includes a V-shaped feeding trough, the bottom of which is open to form an opening, and a push block is slidably connected in the opening, the upper part of the push block is placed in the feeding trough, and the lower part of the push block is connected to the transmission chain, and the transmission chain drives the push block to slide in the feeding trough opening to push the tube in the feeding trough forward to complete the feeding. However, the conveying device generally has the following defects in actual application: when the chain drives the push block to move to the tail end of the trough, the push block rotates downward at the tail end of the trough as the chain runs, and the push block will squeeze the edge of the pipe due to the rotation angle during the rotation process. For pipes with thin walls and large diameters, when the push block rotates at the tail end of the trough and squeezes the end of the pipe, it will cause damage or deformation of the edge of the pipe, and even cause the front end of the pipe to warp, affecting the positioning of the pipe when it is cut at subsequent workstations. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide an automatic pipe feeding device which has a fast pipe lifting speed, high feeding efficiency and can adjust the inclination of the pipe when feeding according to the outer diameter size of the pipe.

[0006] The technical solution of the present invention is to provide an automatic pipe feeding device having the following structure:

[0007] A material storage rack having a material storage space for placing pipe fittings therein, and a feeding channel is arranged on one side of the material storage rack, and the feeding channel is configured to allow only one pipe fitting to pass through at a time; a plurality of mandrels extending along the width direction of the material storage rack and distributed along the length direction of the material storage rack are movably connected in the material storage space, and the mandrels can move along the height direction of the material storage rack to lift the pipe fittings in the material storage rack upward;

[0008] Two groups of lifting mechanisms: a first group of lifting mechanisms and a second group of lifting mechanisms, the first group of lifting mechanisms and the second group of lifting mechanisms are both connected to the material storage rack below the push rod, and the first group of lifting mechanisms is arranged on the side of the material storage space close to the feeding channel, and the second group of lifting mechanisms is arranged on the side of the material storage space away from the feeding channel; the driving ends of the first group of lifting mechanisms are respectively connected to the first ends of all the push rods, and the driving ends of the second group of lifting mechanisms are respectively connected to the second ends of all the push rods, and the two groups of lifting mechanisms can respectively drive the two ends of the push rod to rise and fall, adjust the height of the two ends of the push rod, so that the height and inclination angle of the push rod can be adjusted, so that the pipe fittings in the material storage rack can automatically fall into the feeding channel under the action of their own gravity;

[0009] A temporary storage rack is connected to the side of the material storage rack located at the feed port, and has a temporary storage plane on its top that is inclined from the inside to the outside and from the top to the bottom, and the temporary storage plane is connected to the feed channel and is used to carry the pipes that fall from the feed channel; the temporary storage rack is provided with an ejection mechanism that can eject the pipes on the temporary storage plane;

[0010] A conveying mechanism is arranged on one side of the temporary storage rack, and is used to receive the pipe fittings ejected by the ejection mechanism on the temporary storage plane, and convey the pipe fittings to the cutting station;

[0011] The control unit is electrically connected to the two sets of lifting mechanisms, the ejecting mechanism and the conveying mechanism respectively.

[0012] After adopting the above structure, the automatic pipe feeding device of the present invention has the following advantages compared with the prior art: the automatic pipe feeding device utilizes two sets of lifting mechanisms to respectively drive the movements of the two ends of the push rod in the storage space of the storage rack, so that the push rod can be raised to lift the pipe fittings in the storage space upwards, and when the pipe fittings are lifted to the feeding height, the push rod can be tilted toward the feeding channel, so that the pipe fittings on the push rod can automatically fall into the feeding channel under the action of their own gravity; or the tilt angle of the push rod can be pre-set according to the aperture, weight and feeding speed of the pipe. For example, for pipes with larger apertures, the tilt angle of the push rod can be smaller, and for pipes with smaller apertures, the tilt angle of the push rod can be smaller. , the inclination angle of the push rod can be larger, and then the two sets of lifting mechanisms can be raised at the same time to lift the pipe to the feeding height, so that the pipe can smoothly enter the feeding channel. Therefore, the automatic pipe feeding device has a fast pipe lifting speed and high feeding efficiency, and can adjust the inclination of the pipe when feeding according to the outer diameter of the pipe, so that the feeding speed of the pipe can be adjusted, thereby improving the working efficiency of the automatic pipe feeding device; in addition, the two sets of lifting mechanisms and the ejection mechanism and conveying mechanism of the temporary storage rack are all connected to the control unit, so that the automatic pipe feeding device is more automated and intelligent, meeting the needs of improving the cutting efficiency of the laser pipe cutting machine.

[0013] Preferably, the first group of lifting mechanisms includes a plurality of first linear push rods connected to the material storage rack and corresponding to the push rods one by one, and the upper end of each first linear push rod is hinged to the first end of the push rod corresponding to the first linear push rod; the first group of lifting mechanisms also includes a first drive motor and a first drive rod connected to the first drive motor in a transmission manner, the first drive motor is electrically connected to the control unit, and the first drive rod is arranged along the length direction of the material storage rack and is respectively connected to each first linear push rod in a transmission manner, so as to simultaneously drive the first linear push rods to move so as to adjust the height of the first end of the push rod. In this way, under the drive of a first drive motor, all the first linear push rods can synchronously drive the first end of the push rod to rise and fall so as to adjust the height of the first end of the push rod, and the structure is simple and the synchronization is good.

[0014] Preferably, the second lifting mechanism comprises a plurality of second linear push rods connected to the material storage rack and corresponding to the mandrels one by one, and the upper end of each second linear push rod is hinged to the second end of the mandrel corresponding to the second linear push rod; the second lifting mechanism also comprises a second drive motor and a second drive rod connected to the second drive motor in a transmission manner, the second drive motor is electrically connected to the control unit, the second drive rod is arranged along the length direction of the material storage rack, and is respectively connected to each second linear push rod in a transmission manner, and is used to simultaneously drive the second linear push rods to move so as to adjust the height of the second end of the mandrel. With such an arrangement, under the drive of a second drive motor, all the second linear push rods can synchronously drive the second end of the mandrel to rise and fall so as to adjust the height of the second end of the mandrel, and the structure is simple and the synchronization is good; in this way, all the mandrels only need two drive motors to synchronously adjust the height of the first end and the second end of the mandrel, the overall structure is simple, the height and inclination of all the mandrels are synchronously adjusted, the adjustment speed is fast, and the efficiency is high.

[0015] Preferably, a connecting rod assembly is provided between the upper end of the second linear push rod and the second end of the push rod, the upper end of the connecting rod assembly is hinged to the second end of the push rod, and the lower end of the connecting rod assembly is hinged to the upper end of the second linear push rod. This arrangement improves the adjustment range of the tilt angle of the second end of the push rod, and can be applied to the tilt adjustment requirements of pipes of different diameters and weights. When the first linear push rod and the second linear push rod simultaneously drive the push rod to adjust the height and tilt, due to the installation error of the first linear push rod and the second linear push rod, the parallelism is insufficient. The arrangement of the connecting rod assembly avoids the jamming of the push rod rotation, and makes up for the defect of insufficient parallelism of the first linear push rod and the second linear push rod.

[0016] Preferably, a stop block is connected to one end of the temporary storage plane close to the conveying mechanism to prevent the pipe fittings on the temporary storage plane from sliding off; at least two ejection mechanisms are provided on the temporary storage rack, and the ejection mechanism includes an ejection cylinder and a top plate connected to the free end of the piston rod of the ejection cylinder, and the top plane of the top plate is parallel to the temporary storage plane. With this arrangement, when the pipe fittings enter the temporary storage plane through the feeding channel, the stop block can prevent the pipe fittings on the temporary storage plane from sliding off, and because the top plane of the top plate is parallel to the temporary storage plane, when the top plate rises upward, it can drive the pipe fittings on the temporary storage plane to rise, and at the same time make the pipe fittings have a tendency to slide outward. When the pipe fittings are lifted to a height higher than the upper end of the stop block, the pipe fittings slide freely onto the conveying mechanism, thereby improving the feeding efficiency.

[0017] Preferably, a limit plate with adjustable height is connected to the outer wall of the material storage rack, the limit plate is located above the side of the material storage rack close to the temporary material storage rack, and the feed channel is formed between the limit plate and the top of the side of the material storage rack close to the temporary material storage rack. The limit plate can be connected to the outer wall of the material storage rack by screws, so that the height of the limit plate can be adjusted, so that the height of the feed channel can be set according to pipes of different apertures to allow only one pipe to enter the feed channel at a time.

[0018] Preferably, the conveying mechanism includes a conveying bracket and a feeding trough connected to the top of the conveying bracket and arranged along the length direction of the storage rack, the bottom of the feeding trough is provided with a chute extending along the length direction of the feeding trough, and the width dimension of the chute is configured to be smaller than the outer diameter dimension of the pipe fitting; the conveying bracket below the feeding trough is connected with a transmission chain that can be transmitted along the length direction of the feeding trough, and the conveying bracket is connected with a fourth driving motor that drives the transmission chain; the transmission chain is connected with at least one push pipe assembly that moves synchronously with the transmission chain, the push pipe assembly can slide in the chute when passing through the chute synchronously with the transmission chain, and at least a part of the push pipe assembly is in the feeding trough, which is used to push the pipe fittings in the feeding trough to move. In this way, when the pipes on the temporary storage rack are ejected and slide into the feeding trough, the fourth driving motor drives the transmission chain to drive, the push pipe assembly moves synchronously with the transmission chain, and when the push pipe assembly slides in the chute, the part of the push pipe assembly in the feeding trough drives the pipe to move forward for transportation.

[0019] Preferably, the push-tube assembly comprises a base connected to the transmission chain, the base is connected to a support plate which can be clearance-matched in the slide groove, the front end top of the support plate is provided with an arc portion, and the support plate is slidably matched with a push plate along the transmission direction of the transmission chain; the push plate has a pushing plane that abuts against the pipe fitting in the conveying trough, and the push plate and the arc portion are both located in the conveying trough when the support plate slides in the slide groove; an elastic member is connected between the support plate and the push plate, which is used to make the pushing plane of the push plate have a movement tendency that is always flush with the front end surface of the support plate, and the elastic force of the elastic member is sufficient to overcome the resistance of the pipe fitting to slide in the conveying trough; when the transmission chain drives the push-tube assembly to run to the tail end of the conveying trough and the push-tube assembly rotates downward with the transmission chain, the push plate slides away from the arc portion of the support plate under the extrusion of the pipe fitting, and at the same time, the arc portion of the support plate continues to push the pipe fitting forward, so that the pushing plane of the push plate avoids the edge of the end face of the downwardly extruded pipe fitting. The push plate is arranged in this way, and the push plate can slide relative to the support plate. Under the elastic force of the elastic member, the push plane of the push plate is always flush with the front end surface of the support plate. The elastic force of the elastic member is sufficient to overcome the resistance of the pipe fitting to slide in the feed trough. Therefore, when the push plane of the push plate pushes the pipe fitting to slide in the feed trough, the push plane of the push plate always remains flush with the front end surface of the support plate, that is, the push plate does not move relative to the support plate, which can facilitate the pushing of the pipe fitting; when the transmission chain drives the push pipe assembly to run to the tail end of the feed trough and the push pipe assembly rotates downward with the transmission chain, the push plate overcomes the elastic force of the elastic member under the extrusion of the pipe fitting and slides away from the circular arc portion to avoid, and at the same time, the circular arc portion of the support plate continues to push the pipe fitting forward, so that the push plane of the push plate avoids the downward extrusion of the end face edge of the pipe fitting, so that the end face edge of the pipe fitting will not be deformed due to the rotation and extrusion of the push plate, especially for pipe fittings with thin walls and large apertures, which well protects the end face edge of the pipe fitting. When cutting pipes, users can accurately determine the size of the cutting according to actual cutting requirements to avoid waste caused by excessive excess material after cutting. For example, a laser cutting machine needs to cut pipes into 1-meter-long sections, and each pipe needs to be cut into four 1-meter-long sections. Then the length of the pipe cut into the storage rack is 4 meters plus four cutting losses and the tail end loss length. The arrangement of the pipe pusher assembly of the present invention can avoid damage to the tail end of the pipe, thereby reducing the length of the tail end loss or reducing the tail end loss, so that the length of the pipe cut into the storage rack can be shorter. For example, the length of the cut pipe can be 4 meters plus the length of three cutting losses, which greatly saves raw materials and avoids waste of resources.

[0020] Preferably, both sides of the base extend outwardly from the two side walls of the transmission chain; rollers are connected to the two side walls of the base, and the conveying brackets on both sides of the base are connected to two guide grooves with openings facing each other. When the base passes through the slide groove with the transmission chain, the rollers on both sides of the base slide in the two guide grooves. In this way, when the base passes through the slide groove with the transmission chain, the rollers on both sides of the base slide in the two guide grooves, so that the push pipe assembly runs more smoothly, the transmission is more stable, and shaking or jamming during the pipe conveying process is avoided.

[0021] Preferably, a base is connected to the outer wall of the storage rack, and the conveying bracket is movably connected to the top of the base; a third group of lifting mechanisms is connected to the base below the conveying bracket, and the third group of lifting mechanisms includes a plurality of third linear push rods distributed along the length direction of the base, and the upper end of each third linear push rod is against the bottom of the conveying bracket; the third group of lifting mechanisms also includes a third drive motor and a third drive rod connected to the third drive motor, and the third drive motor is electrically connected to the control unit, and the third drive rod is arranged along the length direction of the base, and is respectively connected to each third linear push rod, and is used to simultaneously drive the third linear push rod to move, so as to adjust the height of the conveying bracket. In this way, the user can adjust the height of the conveying bracket, so that the height of the feed trough can be adjusted, so as to adjust the falling height of the pipe fittings between the feed trough and the temporary storage rack, so as to better meet the requirements that pipe fittings of different apertures can fall smoothly into the feed trough.

[0022] Preferably, a detection unit for detecting the position of the push-tube assembly is connected to the conveying bracket at the tail end of the feed trough, and the detection unit is electrically connected to the control unit; a guide bracket is connected to the conveying bracket at the tail end of the feed trough, and a roller is connected to the guide bracket, and the inclination direction of the roller is consistent with the inclination direction of the inner wall of one side of the feed trough, so as to fit with the surface of the pipe when the pipe passes through. In this arrangement, when the detection unit detects that the push-tube assembly passes, the control unit controls the ejection cylinder to eject the pipe on the temporary storage plane into the feed trough, so that the conveying mechanism conveys the next pipe. The arrangement of the roller, when the conveying mechanism conveys the pipe to the cutting station, the roller fits with the surface of the pipe to achieve the connection between the automatic feeding device of the pipe and the cutting station, avoids the deviation of the pipe, and improves the cutting or conveying efficiency.

[0023] Another technical solution of the present invention is to provide a laser tube cutting machine with the following structure, which includes the automatic tube feeding device described in any of the above technical solutions. The laser tube cutting machine has a fast tube lifting speed and high feeding efficiency, and can adjust the inclination of the tube feeding according to the outer diameter of the tube, so that the feeding speed of the tube can be adjusted, and the working efficiency of the automatic tube feeding device is improved; and it can well protect the edge of the end face of the tube. When the user cuts the tube, he can accurately cut the size according to the actual cutting requirements to avoid excessive waste caused by excess material after cutting the tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an automatic pipe feeding device of the present invention.

[0025] Figure 2 The invention relates to an automatic pipe feeding device. Figure 1 Schematic diagram of the enlarged structure of part A in FIG.

[0026] Figure 3 The present invention is a schematic structural diagram of a material storage rack of an automatic pipe feeding device.

[0027] Figure 4 The utility model is a partial cross-sectional structural schematic diagram of an automatic pipe feeding device of the present invention.

[0028] Figure 5 The present invention is a schematic structural diagram of two sets of lifting mechanisms of an automatic pipe feeding device.

[0029] Figure 6 The present invention is a schematic structural diagram of a conveying mechanism of an automatic pipe feeding device.

[0030] Figure 7 The present invention is a schematic diagram of the tail end structure of a conveying mechanism of an automatic pipe feeding device.

[0031] Figure 8 The present invention is a schematic cross-sectional structural diagram of a conveying mechanism of an automatic pipe feeding device.

[0032] Fig. 9 The utility model is a structural schematic diagram of a pipe pushing assembly of an automatic pipe feeding device of the present invention.

[0033] Fig.10 The utility model is a schematic diagram of the assembly structure of a pipe pushing component of an automatic pipe feeding device of the present invention.

[0034] Fig.11 The present invention is a schematic structural diagram of a push plate of a pipe pushing assembly of an automatic pipe feeding device in a squeezed state.

[0035] Fig.12The invention discloses a cross-sectional structural diagram of a pipe pushing assembly of an automatic pipe feeding device.

[0036] Fig.13 The invention discloses a structural schematic diagram of a push plate being squeezed when a push pipe assembly of an automatic pipe feeding device rotates.

[0037] As shown in the figure:

[0038] 1. Material storage rack, 100. Material storage space, 101. Material feeding channel, 102. Mandrel, 103. Crossbar, 104. Longitudinal bar, 105. Limit plate, 106. Blocking fence, 2. First lifting mechanism, 200. First linear push rod, 201. First driving rod, 202. First driving motor, 203. Support, 3. Second lifting mechanism, 300. Second linear push rod, 301. Second driving rod, 302, second drive motor, 303, connecting rod assembly, 4, temporary storage rack, 400, temporary storage plane, 401, stop block, 402, ejection cylinder, 403, ejector plate, 5, conveying mechanism, 500, base, 501, conveying bracket, 502, feed trough, 503, slide groove, 504, jack, 505, guide rod, 506, detection unit, 507, guide bracket, 508, roller, 509, guide groove, 6, push tube assembly, 600, base, 601, roller, 602, support plate, 603, arc portion, 604, push plate, 605, push plane, 606, slide hole, 607, connecting column, 608, elastic member, 7, transmission chain, 700, fourth drive motor, 701, sprocket, 8, third drive motor, 800, third linear push rod, 801, third drive rod. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] See also Figure 1 to Figure 5 As shown;

[0041] The embodiment of the present invention discloses an automatic tube feeding device, which is used to convey tube fittings to a laser tube cutting machine. The structure of the device includes a storage rack 1 having a storage space 100 for placing the tube fittings. In the embodiment, the storage rack 1 is welded by a plurality of longitudinal bars 104 and transverse bars 103 into a frame with an open top, and a storage space 100 is formed in the frame. The storage space 100 can be used for stacking the tube fittings along the length direction of the storage rack 1. A feeding channel 101 is provided on one side of the storage rack 1, and the feeding channel 101 is configured to allow only one pipe to pass through at a time; in the present embodiment, a portion of a shielding fence 106 is provided on the periphery of the storage rack 1, and a supporting beam is connected to the shielding fence 106, which extends horizontally toward the storage rack 1, and a limiting plate 105 whose height can be adjusted up and down is connected to the free end of the supporting beam. Specifically, an elongated hole is provided in the height direction of the limiting plate 105, and a mounting piece is connected to the free end of the supporting beam through the elongated hole. The height of the limiting plate 105 can be adjusted by adjusting the position of the mounting piece in the elongated hole. The limiting plate 105 is located above the side of the storage rack 1 close to the temporary storage rack 4, and the feeding channel 101 is formed between the limiting plate 105 and the top of the side of the storage rack 1 close to the temporary storage rack 4. The height of the limiting plate 105 is adjustable, so that the height of the feed channel 101 can be set according to the pipes of different apertures to allow only one pipe to enter the feed channel 101 at a time; moreover, in this embodiment, the number of the limiting plates 105 is two, and they are distributed along the length direction of the feed channel 101.

[0042] In this embodiment, a plurality of push rods 102 extending along the width direction of the storage rack 1 and distributed along the length direction of the storage rack 1 are movably connected in the storage space 100, and the push rods 102 can move along the height direction of the storage rack 1 to lift the pipe fittings in the storage rack 1 upward; in this embodiment, the longitudinal rods 104 of the storage rack 1 are arranged in pairs, and a space for the movement of the two ends of the push rod 102 is formed between the two longitudinal rods 104, and the number of the push rods 102 can be arranged according to the length of the storage rack 1. The automatic pipe feeding device also includes two groups of lifting mechanisms: a first group of lifting mechanisms 2 and a second group of lifting mechanisms 3, the first group of lifting mechanisms 2 and the second group of lifting mechanisms 3 are both connected to the storage rack 1 below the push rod 102, and the first group of lifting mechanisms 2 is arranged on the side of the storage space 100 close to the feeding channel 101, and the second group of lifting mechanisms 3 is arranged on the side of the storage space 100 away from the feeding channel 101; the driving ends of the first group of lifting mechanisms 2 are respectively connected to the first ends of all the push rods 102, and the driving ends of the second group of lifting mechanisms 3 are respectively connected to the second ends of all the push rods 102, and the two groups of lifting mechanisms can respectively drive the two ends of the push rod 102 to rise and fall, adjust the height of the two ends of the push rod 102, so that the height and inclination angle of the push rod 102 can be adjusted, so that the pipe fittings in the storage rack 1 can automatically fall into the feeding channel 101 under the action of their own gravity. The automatic pipe feeding device uses two sets of lifting mechanisms to respectively drive the movements of the two ends of the push rod 102 in the storage space 100 of the storage rack 1, so that the push rod 102 can be raised to lift the pipe fittings in the storage space 100 upward. When the pipe fittings are lifted to the feeding height, the push rod 102 can be tilted toward the feeding channel 101, so that the pipe fittings on the push rod 102 automatically fall into the feeding channel 101 under the action of their own gravity; or the tilt angle of the push rod 102 can be pre-set according to the aperture, weight and feeding speed of the pipe. For example, for pipes with larger apertures, the push rod 102 can be tilted. For pipes with smaller inclination angles and smaller apertures, the push rod 102 can have a larger inclination angle, and then the two sets of lifting mechanisms can be raised simultaneously to lift the pipes to the feeding height, so that the pipes can smoothly enter the feeding channel 101. Therefore, the automatic pipe feeding device has a fast pipe lifting speed and high feeding efficiency, and can adjust the inclination of the pipes during feeding according to the outer diameter of the pipes, so that the feeding speed of the pipes can be adjusted, thereby improving the working efficiency of the automatic pipe feeding device.

[0043] See again Figure 1 and Figure 2As shown, in this embodiment, the automatic pipe feeding device also includes a temporary storage rack 4, which is connected to the side of the storage rack 1 located at the feed port, and has a temporary storage plane 400 on its top that is inclined from the inside to the outside and from the top to the bottom, and the temporary storage plane 400 is connected to the feed channel 101, and is used to carry the pipe fittings dropped from the feed channel 101; the temporary storage rack 4 is provided with an ejection mechanism that can eject the pipe fittings on the temporary storage plane 400; specifically, a stop block 401 is connected to one end of the temporary storage plane 400 close to the conveying mechanism 5, which is used to prevent the pipe fittings on the temporary storage plane 400 from slipping; the temporary storage rack 4 is provided with at least two ejection mechanisms, and the ejection mechanism includes an ejection cylinder 402 and a top plate 403 connected to the free end of the piston rod of the ejection cylinder 402, and the top plane of the top plate 403 is parallel to the temporary storage plane 400. When the pipes enter the temporary storage plane 400 through the feed channel 101, the stopper 401 can prevent the pipes on the temporary storage plane 400 from sliding off, and because the top plane of the top plate 403 is parallel to the temporary storage plane 400, when the top plate 403 rises, the pipes on the temporary storage plane 400 can be driven to rise, and at the same time, the pipes have a tendency to slide outward. When the pipes are raised to a height higher than the upper end of the stopper 401, the pipes slide freely onto the conveying mechanism 5, thereby improving the feeding efficiency. The automatic pipe feeding device also includes a conveying mechanism 5, which is arranged on one side of the temporary storage rack 4, and is used to receive the pipes ejected by the ejection mechanism on the temporary storage plane 400, and convey the pipes to the cutting station; a control unit is electrically connected to the two sets of lifting mechanisms, the ejection mechanism and the conveying mechanism 5, respectively. In this embodiment, the control unit can generally be a control box, a control computer, a PLC controller, a single-chip microcomputer, etc. The two sets of lifting mechanisms and the ejection mechanism and the conveying mechanism 5 of the temporary storage rack 4 are all connected to the control unit, so that the automatic pipe feeding device is more automated and intelligent, meeting the needs of improving the cutting efficiency of the laser pipe cutting machine.

[0044] See again Figure 5As shown, as an embodiment of the present invention; the first group of lifting mechanisms 2 includes a plurality of first linear push rods 200 connected to the storage rack 1 and corresponding to the push rods 102 one by one, and the upper end of each first linear push rod 200 is hinged to the first end of the push rod 102 corresponding to the first linear push rod 200 through a support 203; the first group of lifting mechanisms 2 also includes a first drive motor 202 and a first drive rod 201 transmission-connected to the first drive motor 202, the first drive motor 202 is electrically connected to the control unit, the first drive rod 201 is arranged along the length direction of the storage rack 1, and is respectively transmission-connected to each first linear push rod 200, for simultaneously driving the first linear push rods 200 to move, so as to adjust the height of the first end of the push rod 102. The second lifting mechanism 3 includes a plurality of second linear push rods 300 connected to the material storage rack 1 and corresponding one to one with the push rods 102, and the upper end of each second linear push rod 300 is hinged to the second end of the push rod 102 corresponding to the second linear push rod 300; the second lifting mechanism 3 also includes a second drive motor 302 and a second drive rod 301 transmission-connected to the second drive motor 302, the second drive motor 302 is electrically connected to the control unit, the second drive rod 301 is arranged along the length direction of the material storage rack 1, and is respectively transmission-connected to each second linear push rod 300, and is used to simultaneously drive the second linear push rods 300 to move to adjust the height of the second end of the push rod 102. Driven by a first drive motor 202, all first linear push rods 200 can synchronously drive the first end of the push rod 102 to rise and fall, and driven by a second drive motor 302, all second linear push rods 300 can synchronously drive the second end of the push rod 102 to rise and fall, so as to adjust the height of the second end of the push rod 102; in this way, all the push rods 102 only need two drive motors to synchronously adjust the height of the first end and the second end of the push rod 102, the overall structure is simple, the height and inclination of all the push rods 102 can be adjusted synchronously, and the adjustment speed is fast and the efficiency is high. In this embodiment, the first linear push rod 200 and the second linear push rod 300 are both products of the prior art, and their general structure includes a housing, a lead screw arranged in the housing, a gear connected to the lead screw, and a drive nut threadedly connected to the lead screw, the drive nut is limited in circumferential rotation and can slide along the length direction of the housing and drive the push rod to extend and retract; the first drive rod 201 and the second drive rod 301 are both connected with drive teeth meshing with the gears on the lead screw, when the two drive motors drive the first drive rod 201 and the second drive rod 301 to rotate respectively, the lead screws in the first linear push rod 200 and the second linear push rod 300 are driven to rotate, so that the two linear push rods are extended and retracted. That is, the first linear push rod 200 and the second linear push rod 300 can be a lead screw nut pair, which is a prior art structure and is not described in detail in this embodiment.

[0045] As an embodiment of the present invention, a connecting rod assembly 303 is provided between the upper end of the second linear push rod 300 and the second end of the push rod 102, the upper end of the connecting rod assembly 303 is hinged to the second end of the push rod 102, and the lower end of the connecting rod assembly 303 is hinged to the upper end of the second linear push rod 300. The setting of the connecting rod assembly 303 increases the inclination angle adjustment range of the second end of the push rod 102, and can be applied to the inclination adjustment requirements of pipes with different diameters and different weights. When the first linear push rod 200 and the second linear push rod 300 simultaneously drive the push rod 102 to adjust the height and inclination, due to the installation error of the first linear push rod 200 and the second linear push rod 300, the parallelism is insufficient. The setting of the connecting rod assembly 303 avoids the jamming of the push rod 102 during rotation, and makes up for the defect of insufficient parallelism of the first linear push rod 200 and the second linear push rod 300. In this embodiment, the connecting rod assembly 303 includes two connecting rods and is respectively arranged on both sides of the second end of the push rod 102.

[0046] See also Figure 6 to Figure 8As shown, the conveying mechanism 5 includes a conveying bracket 501 and a conveying trough 502 connected to the top of the conveying bracket 501 and arranged along the length direction of the storage rack 1, the bottom of the conveying trough 502 is provided with a slide 503 extending along the length direction of the conveying trough 502, and the width of the slide 503 is configured to be smaller than the outer diameter of the pipe; the conveying bracket 501 below the conveying trough 502 is connected to a transmission chain 7 that can be transmitted along the length direction of the conveying trough 502, and the conveying bracket 501 is connected to a fourth driving motor 700 that drives the transmission chain 7. In this embodiment, the conveying bracket 501 below the conveying trough 502 A plurality of sprockets 701 are provided on the rack 4 for transmission with the transmission chain 7. The fourth drive motor 700 is connected to the sprockets 701 for transmission and can transmit the transmission chain 7. The transmission chain 7 is connected to at least one push tube assembly 6 for synchronous movement with the transmission chain 7. The push tube assembly 6 can slide in the chute 503 when passing through the chute 503 synchronously with the transmission chain 7, and at least a part of the push tube assembly 6 is in the feed trough 502 for pushing the pipes in the feed trough 502 to move. When the pipes on the temporary storage rack 4 are ejected and slide into the feed trough 502, the fourth drive motor 700 drives the transmission chain 7 for transmission, and the push tube assembly 6 moves synchronously with the transmission chain 7. When the push tube assembly 6 slides in the chute 503, the part of the push tube assembly 6 in the feed trough 502 drives the pipes to move forward for transmission. In this embodiment, a detection unit 506 for detecting the position of the push tube assembly 6 is connected to the conveying bracket 501 at the rear end of the feed trough 502, and the detection unit 506 is electrically connected to the control unit; the detection unit 506 can be an infrared sensor, a proximity switch, a photoelectric switch, etc. A guide bracket 507 is connected to the conveying bracket 501 at the rear end of the feed trough 502, and a roller 508 is connected to the guide bracket 507. The inclination direction of the roller 508 is consistent with the inclination direction of the inner wall of one side of the feed trough 502, and is used to fit the surface of the pipe when the pipe passes. When the detection unit 506 detects that the push tube assembly 6 passes, the control unit controls the ejection cylinder 402 to eject the pipe on the temporary storage plane 400 into the feed trough 502, so that the conveying mechanism 5 can convey the next pipe. The roller 508 is arranged so that when the conveying mechanism 5 conveys the pipe to the cutting station, the roller 508 fits the surface of the pipe to realize the connection between the automatic pipe feeding device and the cutting station, avoiding the deviation of the pipe, so as to improve the cutting or conveying efficiency.

[0047] See also Figures 9 to 13As shown, as an embodiment of the present invention; the push tube assembly 6 includes a base 600 connected to the transmission chain 7, and the base 600 is connected to a support plate 602 that can be loosely fitted in the slide groove 503, and the front end top of the support plate 602 is provided with an arc portion 603, and the support plate 602 is slidably matched with a push plate 604 along the transmission direction of the transmission chain 7; in this embodiment, the support plate 602 is provided with an elongated sliding hole 606 arranged along the length direction of the feed trough 502 The push plate 604 is provided with a card slot which is sleeved on the support plate 602. The card slot runs through the front and rear end surfaces of the push plate 604. The card slot of the push plate 604 can slide on the support plate 602. In addition, the push plate 604 is connected with a connecting column 607. The connecting column 607 is loosely fitted in the sliding hole 606. The elastic member 608 is a spring which is arranged in the sliding hole 606. One end of the elastic member 608 is connected to the connecting column 607, and the other end of the elastic member 608 is against the inner wall of the sliding hole 606.

[0048] In this embodiment, both sides of the base 600 extend outward from the two side walls of the transmission chain 7; rollers 601 are connected to both side walls of the base 600, and two guide grooves 509 with openings opposite to each other are connected to the conveying brackets 501 on both sides of the base 600. When the base 600 passes through the slide groove 503 with the transmission chain 7, the rollers 601 on both sides of the base 600 slide in the two guide grooves 509. When the base 600 moves through the slide groove 503 with the transmission chain 7, the rollers 601 on both sides of the base 600 slide in the two guide grooves 509, so that the push pipe assembly 6 runs more smoothly, the transmission is more stable, and shaking or jamming during the pipe conveying process is avoided.

[0049] In this embodiment, the push plate 604 has a push plane 605 that abuts against the pipe in the feed trough 502, and the push plate 604 and the arc portion 603 are both located in the feed trough 502 when the support plate 602 slides in the slide groove 503; an elastic member 608 is connected between the support plate 602 and the push plate 604, which is used to make the push plane 605 of the push plate 604 have a movement tendency to always be flush with the front end surface of the support plate 602, and the elastic member 608 The elastic force is sufficient to overcome the resistance of the pipe fitting to slide in the feed trough 502; when the transmission chain 7 drives the push tube assembly 6 to run to the tail end of the feed trough 502 and the push tube assembly 6 rotates downward with the transmission chain 7, the push plate 604 slides in the direction away from the arc portion 603 of the support plate 602 under the extrusion of the pipe fitting, and at the same time, the arc portion 603 of the support plate 602 continues to push the pipe fitting forward, so that the pushing plane 605 of the push plate 604 avoids the edge of the end face of the pipe fitting that is squeezed downward. The push plate 604 is slidable relative to the support plate 602. Under the elastic force of the elastic member 608, the push plane 605 of the push plate 604 is always flush with the front end surface of the support plate 602. The elastic force of the elastic member 608 is sufficient to overcome the resistance of the pipe fitting to slide in the feed trough 502. Therefore, when the push plane 605 of the push plate 604 pushes the pipe fitting to slide in the feed trough 502, the push plane 605 of the push plate 604 always remains flush with the front end surface of the support plate 602, that is, the push plate 604 does not move relative to the support plate 602, which can facilitate the pushing of the pipe fitting. When the transmission chain 7 drives the push tube assembly 6 to run to the tail end of the feed trough 502 and the push tube assembly 6 rotates downward with the transmission chain 7, the push plate 604 overcomes the elastic force of the elastic member 608 under the extrusion of the pipe fitting and moves away from the arc portion 603 The push plate 604 slides in the opposite direction to avoid the pipe fitting, and at the same time, the arc portion 603 of the support plate 602 continues to push the pipe fitting forward, so that the pushing plane 605 of the push plate 604 avoids squeezing the end edge of the pipe fitting downward, so that the end edge of the pipe fitting will not be deformed due to the rotation and squeezing of the push plate 604, especially the pipe fitting with a thin wall and a large aperture, which well protects the end edge of the pipe fitting. When cutting pipes, users can accurately determine the cutting size according to actual cutting requirements to avoid waste caused by excessive excess material after cutting. For example, a laser cutting machine needs to cut a pipe into four equal lengths of 1 meter, and each pipe needs to be cut four times to form four equal lengths of 1 meter and tail end loss. In this case, the length of the pipe cut into the storage rack 1 is 4 meters plus the length of four cutting losses and the tail end loss length. The arrangement of the pipe pusher assembly 6 of the present invention can avoid damage to the tail end of the pipe, thereby reducing the length of the tail end loss or reducing the tail end loss, so that the length of the pipe cut into the storage rack 1 can be shorter. For example, the length of the cut pipe can be 4 meters plus the length of three cutting losses, which greatly saves raw materials and avoids waste of resources.

[0050] See again Figure 4 and Figure 6As shown, as an embodiment of the present invention; a base 500 is connected to the outer wall of the storage rack 1, and the conveying bracket 501 is movably connected to the top of the base 500; a third group of lifting mechanisms is connected to the base 500 below the conveying bracket 501, and the third group of lifting mechanisms includes a plurality of third linear push rods 800 distributed along the length direction of the base 500, and the upper end of each third linear push rod 800 is against the bottom of the conveying bracket 501; the third group of lifting mechanisms also includes a third drive motor 8 and a third drive rod 801 transmission-connected to the third drive motor 8, the third drive motor 8 is electrically connected to the control unit, and the third drive rod 801 is arranged along the length direction of the base 500, and is respectively transmission-connected to each third linear push rod 800, for simultaneously driving the third linear push rod 800 to move, so as to adjust the height of the conveying bracket 501. In this embodiment, the bottom of the conveying bracket 501 is connected with a plurality of guide rods 505 vertically downwardly arranged, and the base 500 is provided with a plurality of sockets 504 for the guide rods 505 to be movably inserted. The conveying bracket 501 is raised and lowered under the drive of the third lifting mechanism, and the guide rods 505 always slide in the sockets 504. The user can adjust the height of the conveying bracket 501, so that the height of the feed trough 502 can be adjusted to adjust the falling height of the pipe fittings between the feed trough 502 and the temporary storage rack 4, so as to better meet the requirements that pipe fittings of different apertures can fall smoothly into the feed trough 502. Moreover, the structure and principle of the third linear push rod 800 are the same as those of the first linear push rod 200 or the second linear push rod 300, which are all prior art products and are not described in detail in this embodiment.

[0051] Another technical embodiment of the present invention is a laser tube cutting machine with the following structure, which includes the automatic tube feeding device described in any of the above embodiments. The laser tube cutting machine has a fast tube lifting speed and high feeding efficiency, and can adjust the inclination of the tube feeding according to the outer diameter of the tube, so that the feeding speed of the tube can be adjusted, and the working efficiency of the automatic tube feeding device is improved; and it can well protect the edge of the end face of the tube. When the user cuts the tube, he can accurately cut the size according to the actual cutting requirements to avoid waste caused by excessive excess material after cutting the tube.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic pipe feeding device, characterized in that: include A material storage rack having a material storage space for placing pipe fittings therein, and a feeding channel is arranged on one side of the material storage rack, and the feeding channel is configured to allow only one pipe fitting to pass through at a time; a plurality of mandrels extending along the width direction of the material storage rack and distributed along the length direction of the material storage rack are movably connected in the material storage space, and the mandrels can move along the height direction of the material storage rack to lift the pipe fittings in the material storage rack upward; Two groups of lifting mechanisms: a first group of lifting mechanisms and a second group of lifting mechanisms, the first group of lifting mechanisms and the second group of lifting mechanisms are both connected to the material storage rack below the push rod, and the first group of lifting mechanisms is arranged on the side of the material storage space close to the feeding channel, and the second group of lifting mechanisms is arranged on the side of the material storage space away from the feeding channel; the driving ends of the first group of lifting mechanisms are respectively connected to the first ends of all the push rods, and the driving ends of the second group of lifting mechanisms are respectively connected to the second ends of all the push rods, and the two groups of lifting mechanisms can respectively drive the two ends of the push rod to rise and fall, adjust the height of the two ends of the push rod, so that the height and inclination angle of the push rod can be adjusted, so that the pipe fittings in the material storage rack can automatically fall into the feeding channel under the action of their own gravity; A temporary storage rack is connected to the side of the material storage rack located at the feed port, and has a temporary storage plane on its top that is inclined from the inside to the outside and from the top to the bottom, and the temporary storage plane is connected to the feed channel and is used to carry the pipes that fall from the feed channel; the temporary storage rack is provided with an ejection mechanism that can eject the pipes on the temporary storage plane; A conveying mechanism is arranged on one side of the temporary storage rack, and is used to receive the pipe fittings ejected by the ejection mechanism on the temporary storage plane, and convey the pipe fittings to the cutting station; The control unit is electrically connected to the two lifting mechanisms, the ejection mechanism and the conveying mechanism respectively; The conveying mechanism includes a conveying bracket and a conveying trough connected to the top of the conveying bracket and arranged along the length direction of the storage rack, the bottom of the conveying trough is provided with a slide groove extending along the length direction of the conveying trough, and the width dimension of the slide groove is configured to be smaller than the outer diameter dimension of the pipe fitting; a transmission chain that can be transmitted along the length direction of the conveying trough is connected to the conveying bracket below the conveying trough, and a fourth driving motor that drives the transmission chain is connected to the conveying bracket; at least one push pipe assembly that moves synchronously with the transmission chain is connected to the transmission chain, and the push pipe assembly can slide in the slide groove when passing through the slide groove synchronously with the transmission chain, and at least a part of the push pipe assembly is in the conveying trough, which is used to push the pipe fittings in the conveying trough to move; The push-tube assembly comprises a base connected to the transmission chain, the base is connected to a support plate which can be clearance-matched in the slide groove, the front end top of the support plate is provided with an arc portion, and the support plate is slidably matched with a push plate along the transmission direction of the transmission chain; the push plate has a pushing plane that abuts against the pipe fitting in the feeding trough, and the push plate and the arc portion are both located in the feeding trough when the support plate slides in the slide groove; an elastic member is connected between the support plate and the push plate, which is used to make the pushing plane of the push plate have a movement tendency that is always flush with the front end surface of the support plate, and the elastic force of the elastic member is sufficient to overcome the resistance of the pipe fitting to slide in the feeding trough; when the transmission chain drives the push-tube assembly to run to the tail end of the feeding trough and the push-tube assembly rotates downward with the transmission chain, the push plate slides away from the arc portion of the support plate under the extrusion of the pipe fitting, and at the same time, the arc portion of the support plate continues to push the pipe fitting forward, so that the pushing plane of the push plate avoids the edge of the end face of the downwardly extruded pipe fitting.

2. The automatic pipe feeding device according to claim 1 is characterized in that: The first group of lifting mechanisms includes a plurality of first linear push rods connected to the material storage rack and corresponding to the push rods one by one, and the upper end of each first linear push rod is hinged to the first end of the push rod corresponding to the first linear push rod; the first group of lifting mechanisms also includes a first drive motor and a first drive rod transmission-connected to the first drive motor, the first drive motor is electrically connected to the control unit, the first drive rod is arranged along the length direction of the material storage rack, and is transmission-connected to each first linear push rod respectively, for simultaneously driving the first linear push rods to move so as to adjust the height of the first end of the push rod.

3. The automatic pipe feeding device according to claim 2 is characterized in that: The second group of lifting mechanisms includes a plurality of second linear push rods connected to the material storage rack and corresponding to the push rods one by one, the upper end of each second linear push rod being hinged to the second end of the push rod corresponding to the second linear push rod; the second group of lifting mechanisms also includes a second drive motor and a second drive rod transmission-connected to the second drive motor, the second drive motor is electrically connected to the control unit, the second drive rod is arranged along the length direction of the material storage rack, and is transmission-connected to each second linear push rod respectively, for simultaneously driving the second linear push rods to move so as to adjust the height of the second end of the push rod.

4. The automatic pipe feeding device according to claim 3 is characterized in that: A connecting rod assembly is provided between the upper end of the second linear push rod and the second end of the push rod, the upper end of the connecting rod assembly is hinged to the second end of the push rod, and the lower end of the connecting rod assembly is hinged to the upper end of the second linear push rod.

5. The automatic pipe feeding device according to claim 1 is characterized in that: A stop block is connected to one end of the temporary storage plane close to the conveying mechanism to prevent the pipe fittings on the temporary storage plane from sliding off; at least two ejection mechanisms are provided on the temporary storage rack, and the ejection mechanism includes an ejection cylinder and a top plate connected to the free end of the piston rod of the ejection cylinder, and the top plane of the top plate is parallel to the temporary storage plane.

6. The automatic pipe feeding device according to claim 1, characterized in that: Both sides of the base extend outward from the side walls of the transmission chain; rollers are connected to the two side walls of the base, and the conveying brackets on both sides of the base are connected to two guide grooves with openings facing each other. When the base passes through the slide groove with the transmission chain, the rollers on both sides of the base slide and fit in the two guide grooves.

7. The automatic pipe feeding device according to claim 1, characterized in that: A base is connected to the outer wall of the storage rack, and the conveying bracket is movably connected to the top of the base; a third group of lifting mechanisms is connected to the base below the conveying bracket, and the third group of lifting mechanisms includes a plurality of third linear push rods distributed along the length direction of the base, and the upper end of each third linear push rod is against the bottom of the conveying bracket; the third group of lifting mechanisms also includes a third drive motor and a third drive rod transmission-connected to the third drive motor, the third drive motor is electrically connected to the control unit, and the third drive rod is arranged along the length direction of the base, and is respectively transmission-connected to each third linear push rod, for simultaneously driving the third linear push rods to move so as to adjust the height of the conveying bracket.

8. A laser tube cutting machine, characterized in that: It comprises the automatic pipe feeding device as described in any one of claims 1 to 7 above.

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