Automatic pipe joint riveting machine

Abstract

The present application relates to a riveting machine, in particular to a pipe automatic riveting machine. A pipe automatic riveting machine comprises a machine body, a stepped pipe automatic feeding mechanism and a rotary pipe guide mechanism are sequentially arranged on the machine body, a riveting mechanism for automatically riveting the pipe is arranged on one side of the pipe guide mechanism, a positioning mechanism for positioning the pipe is arranged on the other side of the pipe guide mechanism, a blocking mechanism for preventing the pipe from deviating is arranged above the pipe guide mechanism, the riveting mechanism comprises a riveting head feeding assembly for automatically feeding the riveting head, a fixing assembly for fixing the pipe and a riveting assembly for automatically riveting the riveting head into the pipe. The present application provides an integrated pipe automatic riveting machine which can automatically complete the orderly feeding, accurate guiding, reliable positioning and clamping and stable riveting of the pipe and the riveting head.

Description

Technical Field

[0001] This invention relates to a riveting machine, and more particularly to an automatic riveting machine for pipe fittings. Background Technology

[0002] Currently, the assembly of pipe fittings and rivets (such as riveting rivets or joints to the ends of pipe fittings) is very common in industries such as machinery manufacturing, furniture, and automotive parts. In existing technologies, pipe riveting often employs a semi-automatic or manual step-by-step operation: workers first manually place the pipe fitting into a simple clamp, then manually place the rivet, and finally start the press or riveting machine to rivet. This method has the following drawbacks: the feeding, positioning, clamping, and riveting actions of the pipe fitting and rivet are separated, relying on manual intervention, resulting in low production efficiency, high labor intensity, and the riveting quality is affected by the operator's skill level, making consistency difficult to guarantee. Furthermore, some automatic riveting equipment can only complete the riveting of pipe fittings of a single specification, and the pipe fittings are prone to deviation or falling during transport, failing to achieve full automation from pipe feeding, guiding, and positioning to automatic supply, fixing, and riveting of the rivet.

[0003] Therefore, there is an urgent need to provide an integrated automatic pipe riveting machine that can automatically complete the orderly feeding, precise guiding, reliable positioning and clamping, and stable riveting of pipe fittings and rivets, so as to solve the problems of low efficiency, unstable quality and low degree of automation in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies where the feeding, positioning, clamping, and riveting actions of pipe fittings and rivets are separated and rely on manual intervention, resulting in low production efficiency and high labor intensity. This invention provides an integrated automatic pipe fitting riveting machine that can automatically complete the orderly feeding, precise guiding, reliable positioning and clamping, and stable riveting of pipe fittings and rivets.

[0005] The present invention is further configured as follows: an automatic pipe riveting machine, comprising a body, on which a stepped automatic pipe feeding mechanism and a rotary pipe guiding mechanism are sequentially arranged. One side of the pipe guiding mechanism is provided with a riveting mechanism for automatically riveting the pipe, and the other side of the pipe guiding mechanism is provided with a positioning mechanism for positioning the pipe. Above the pipe guiding mechanism is a blocking mechanism to prevent the pipe from deviating. The riveting mechanism includes a riveting joint feeding assembly for automatically feeding the riveting joint, a fixing assembly for fixing the pipe, and a riveting assembly for automatically riveting the riveting joint into the pipe.

[0006] Using the above technical solution, after the pipe fittings are sorted and ascended by the stepped automatic pipe fitting feeding mechanism, they enter the rotary pipe fitting guiding mechanism. The guiding mechanism intermittently rotates to deliver each pipe fitting to the riveting station sequentially. During this process, the positioning mechanism limits the axial position of the pipe fittings, and the blocking mechanism prevents the pipe fittings from jumping out during transport. When the pipe fitting reaches the riveting station, the fixing component clamps it, and at the same time, the riveting head feeding component automatically supplies a riveting head. Subsequently, the riveting component presses or screws the riveting head into the pipe fitting to complete the riveting. In the entire process, the feeding, guiding, positioning, anti-deviation, clamping, riveting head feeding, and final riveting of the pipe fittings are all completed automatically by the machine without manual intervention, thereby greatly improving production efficiency and ensuring that the riveting position and force of each product are consistent.

[0007] The present invention is further configured such that: the stepped pipe fitting automatic feeding mechanism includes an inclined hopper, a multi-stage material distribution step assembly located at one end of the hopper, a guiding mechanism that cooperates with the multi-stage material distribution step assembly for feeding, and a power drive mechanism for driving the guiding mechanism. The top of the multi-stage material distribution step assembly is provided with an inclined discharge slide, and one side of the hopper is provided with an adjustment mechanism for adjusting the length of the hopper.

[0008] Using the above technical solution, after batches of pipe fittings are poured into the inclined hopper, the fittings converge towards the multi-stage distribution platform assembly under gravity. A power-driven mechanism drives a guiding mechanism to reciprocate between the distribution platforms, lifting the fittings step by step from the lowest platform to the top discharge chute. The discharge chute is inclined, and the fittings automatically slide towards the guiding mechanism under gravity. When processing fittings of different lengths, the length of the hopper is adjusted by an adjustment mechanism to match the internal space of the hopper with the fitting length, preventing the fittings from becoming misaligned or stuck in the hopper. This feeding mechanism requires no vibratory feeder, operates with low noise, and can accommodate fittings of various lengths.

[0009] The present invention is further configured such that: the multi-stage material distribution step assembly includes a first support plate, a second support plate, a third support plate, and a fourth support plate arranged in a stepped manner from bottom to top; a gap is formed between two adjacent support plates, and the tops of the first support plate, the second support plate, and the third support plate are respectively inclined; the guiding mechanism includes a first slider, a second slider, and a third slider; the first slider is disposed in the gap between the first support plate and the second support plate, the second slider is disposed in the gap between the second support plate and the third support plate, and the third slider is disposed in the gap between the third support plate and the fourth support plate, and the sides of the first slider, the second slider, and the third slider are respectively in contact with and slide against the adjacent support plates; the first The tops of the first, second, and third sliders are all inclined. The power drive mechanism includes a motor, eccentric wheels, connecting rods, a crossbeam, guide rails, guide sliders, and a connecting seat. Eccentric wheels are mounted on the motor shafts on both sides of the motor. A connecting rod is provided on the side of the eccentric wheel facing away from the motor. A crossbeam is mounted above the motor, and both ends of the crossbeam are connected to the connecting rods on both sides. Guide rails are provided on the inner walls of both sides of the machine body, and at least one guide slider is provided on the guide rail that slides with the guide rail. The crossbeam is connected to the guide slider through the connecting seat. The connecting seat has slider grooves arranged in a stepped manner from bottom to top, and the bottoms of the first, second, and third sliders are respectively located in the corresponding slider grooves.

[0010] Using the above technical solution, after the motor starts, it drives the eccentric wheels on both sides to rotate synchronously. The eccentric wheels convert the rotational motion into reciprocating linear motion through the connecting rod, driving the crossbeam to slide up and down along the guide rails on both sides of the machine body. The crossbeam is fixedly connected to each guide slider through the connecting seat. The guide sliders slide on the guide rails to ensure the stability of the crossbeam's movement. The connecting seat has stepped slider grooves opened sequentially from bottom to top. The bottoms of the first slider, the second slider, and the third slider are respectively embedded in the corresponding slider grooves. Therefore, when the connecting seat moves up and down with the crossbeam, the three sliders rise and fall synchronously in the gaps between the support plates. When the sliders start to rise from the lowest point, the first slider moves upward through the gap between the first support plate and the second support plate. The inclined surface at its top lifts the pipes piled on the inclined surface of the first support plate and raises them to a height higher than the second support plate. Then the slider begins to descend, and the pipes roll down the inclined surface at the top of the first slider onto the inclined surface of the second support plate under the action of gravity. Because the top of the second support plate is also sloped, the pipe fitting, after falling onto the second support plate, will continue to roll automatically along the slope until it is blocked by the root of the slope of the second slider (at this time, the second slider is in a low position). The pipe fitting then stays on the slope of the second slider, waiting for the next lifting. At the same time, the second and third sliders also perform the same actions synchronously within their respective gaps: when the sliders rise again, the second slider lifts the pipe fitting that is staying on its slope and sends it to the slope of the third support plate. The pipe fitting rolls along the slope of the third support plate to the third slider. The third slider lifts the pipe fitting and sends it to the slope of the fourth support plate. After the pipe fitting reaches the fourth support plate, because the top of the fourth support plate is also sloped, the pipe fitting automatically rolls into the discharge chute and rolls along the discharge chute to the next station. After the slider descends to the bottom, the next batch of pipe fittings is automatically replenished from the hopper onto the first support plate and rolls along the slope of the first support plate to the first slider. Then the slider rises again to start the next material distribution cycle. Through this stepped arrangement of four support plates and three sliders, the pipe is lifted upwards step by step, with each transfer completed by the automatic rolling of the inclined plane. Throughout the process, all sliders are synchronously driven by the same motor, and the actions of each level are coordinated. The pipe always rolls along the inclined plane during the transfer, avoiding hard collisions and falling impacts, causing no damage to the surface of the pipe, and the structure is compact with high material distribution reliability.

[0011] The present invention is further configured such that: the adjustment mechanism includes an adjustment plate, at least one lead screw connected to the adjustment plate, a transmission shaft connected to the lead screw, and a handwheel connected to the transmission shaft; the adjustment plate is located inside the hopper and parallel to the side plate of the hopper; the adjustment plate has adjustment plate grooves arranged in a stepped manner from bottom to top; the first support plate, the second support plate, and the third support plate are respectively placed in the corresponding adjustment grooves; one side plate of the hopper is provided with a mounting seat; the mounting seat is provided with a reversing gearbox assembly; the lead screw is connected to the reversing gearbox assembly and extends into the hopper and is connected to the adjustment plate through a connecting seat; the transmission shaft is connected to the reversing gearbox, and the handwheel is connected to the end of the transmission shaft.

[0012] Using the above technical solution, when the hopper length needs to be adjusted to accommodate pipes of different lengths, the operator turns the handwheel, which drives the drive shaft to rotate. The drive shaft transmits power to the lead screw through a reversing gearbox assembly. When the lead screw rotates, it pushes the adjusting plate to move along the length direction within the hopper. The adjusting plate has stepped adjusting plate slots, with the first, second, and third support plates placed in their corresponding slots, and these support plates remaining stationary. When the adjusting plate moves, each adjusting plate slot slides relative to its corresponding support plate, meaning the support plate remains stationary, while the adjusting plate moves horizontally relative to the support plate under the push of the lead screw. Through this structure, the effective length of the hopper can be adjusted. Furthermore, because the stepped spacing between each adjusting plate slot matches the fixed spacing between each support plate, the relative position and gap between each material distribution step remain unchanged after adjustment. This allows for rapid adaptation to pipes of different lengths without replacing any parts.

[0013] The present invention is further configured such that: the pipe guide mechanism includes a rotating shaft and two rotating wheels mounted on the rotating shaft; a servo motor is provided on one side of the machine body; one end of the rotating shaft is connected to the servo motor, and the other end is connected to the other side of the machine body through a rotating seat; at least one placement groove for placing pipes is provided on the rotating wheels; the outlet end of the discharge slide corresponds to the placement groove on the rotating wheels; a discharge plate is provided on the other end of the machine body facing the discharge slide, and the discharge plate is inclined and located below the rotating wheels; a baffle mechanism is provided above the rotating wheels to prevent pipes from falling.

[0014] Using the above technical solution, a servo motor drives a rotating wheel to perform intermittent indexing rotation via a rotating shaft. When stationary, the multiple placement slots on the wheel align one of them precisely with the outlet end of the discharge chute, allowing the pipe fitting to fall into the placement slot from the discharge chute. As the wheel rotates, the outer circumference of its non-slotted portion blocks the outlet of the discharge chute, preventing the pipe fitting from falling and achieving single-piece separation and error-proof loading. The wheel continues to rotate, sequentially carrying the pipe fittings in the placement slots through the riveting station. After positioning and riveting, when the placement slot rotates to below the wheel, its opening faces downwards, aligning precisely with the upper inlet of the inclined discharge plate fixed to the machine body. Under gravity, the pipe fitting automatically detaches from the placement slot, falls onto the discharge plate, and smoothly rolls along the inclined surface of the plate into the finished product collection container. The discharge plate is fixed to the machine body and does not move with the wheel, ensuring the stability of the discharge position and the consistency of the pipe fitting's rolling trajectory. Meanwhile, the baffle mechanism (arc-shaped baffle plate) above the rotor covers the top and sides of the rotor, preventing the pipes from jumping out of the placement slot due to centrifugal force or vibration during rotation, thus ensuring the stability of the conveying process. The entire process from feeding and conveying to discharging is automatically completed by the intermittent rotation of the rotor and the fixed positional relationship of each component, without the need for additional pushing or blowing devices, making it reliable and energy-efficient.

[0015] The present invention is further configured such that: the positioning mechanism includes a positioning plate capable of abutting against the pipe fitting, a positioning screw connected to the positioning plate, a positioning reversing gearbox assembly connected to the positioning screw, a positioning transmission shaft connected to the positioning reversing gearbox assembly, and a positioning handwheel; a positioning fixing seat is provided on the side wall of the machine body; the positioning reversing gearbox assembly is disposed on the positioning fixing seat; the positioning screw is connected to the positioning reversing gearbox assembly and fixed to the positioning plate; the positioning transmission shaft is connected to the positioning reversing gearbox assembly, and the end of the positioning transmission shaft is connected to the positioning handwheel.

[0016] Using the above technical solution, when it is necessary to adjust the axial positioning position of the pipe fitting before riveting, the operator rotates the positioning handwheel. The positioning handwheel drives the positioning transmission shaft to rotate, and the positioning transmission shaft transmits power to the positioning screw through the positioning reversing gearbox assembly. When the positioning screw rotates, it pushes the positioning plate to move axially along the pipe fitting. After the positioning plate moves into place, its end face exactly abuts against one end of the pipe fitting, thereby determining the axial extension length of the pipe fitting in the placement groove. Due to the self-locking characteristic of the screw, the positioning plate can remain stable after adjustment and will not shift due to vibration during the riveting process. Through this manual adjustment structure, the equipment can quickly adapt to pipe fittings of different lengths, and the adjustment accuracy is high and the operation is simple.

[0017] The present invention is further configured such that: the material blocking mechanism includes a material blocking plate, the material blocking plate includes an arc-shaped material blocking plate mounted above the rotating wheel and conforming to the arc of the rotating wheel, and an inclined material blocking plate extending above the discharge slide and conforming to the inclined surface of the discharge slide; a guide rod is provided on the side wall of the machine body; the arc-shaped material blocking plate and the inclined material blocking plate are integrally formed and provided on the guide rod and fixed by a limiting nut; a limiting plate is provided on one side of the discharge slide, the limiting plate being an inclined limiting plate conforming to the inclined surface of the discharge slide; a cylinder is provided on the side of the machine body where the positioning plate is located, and the limiting plate is connected to the cylinder through a cylinder shaft.

[0018] Using the above technical solution, an arc-shaped baffle is mounted above the rotating wheel, with its inner arc surface maintaining a slight gap with the outer circle of the wheel. When the wheel rotates, the arc-shaped baffle always covers the opening side of the placement slot, preventing the pipe fitting from jumping out of the slot. A sloping baffle extends above the discharge chute, its slope matching the chute's slope, preventing the pipe fitting from slipping off the top when stacked or rolling on the chute. The arc-shaped baffle and the sloping baffle are integrally formed and fixed to the guide rod, and their gap with the rotating wheel or chute can be adjusted using a limiting nut. A limiting plate is provided on one side of the discharge chute, its slope matching the chute's slope. Before starting work, based on the length of the pipe fitting to be processed, a cylinder drives the limiting plate to move laterally along the discharge chute, ensuring the distance between the limiting plate and the side wall of the other side of the discharge chute matches the pipe fitting's length. After the pipe fitting rolls down from the multi-stage material distribution assembly onto the discharge chute, it slides naturally down the inclined surface of the chute, its right end automatically contacting the limiting plate. This aligns the right end of the pipe fitting on the discharge chute, eliminating axial positional deviations caused by varying lengths or random falls. The pipe fitting then falls from the discharge chute into the placement slot of the rotating wheel. Because the limiting plate is a stationary stop, the pipe fitting experiences no impact during its descent, and a small gap is maintained between its left end and the positioning plate. Both ends of the pipe fitting are supported by the rotating wheels on the left and right sides, allowing it to move freely within the placement slot. After the rotating wheel delivers the pipe fitting to the riveting station, the fixing assembly is not yet clamped, and the pipe fitting remains axially movable within the placement slot. The riveting assembly begins operation. Driven by a servo motor, the rotary riveting head is fed towards the pipe fitting, first inserting into the inner hole held by the pneumatic chuck, and then continuing to push forward, disengaging the riveting head from the pneumatic chuck. Subsequently, the rotary riveting head, carrying the riveting head, continues to feed towards the pipe fitting, inserting the riveting head into the inner hole of the pipe end. During the insertion of the riveting head into the pipe fitting's inner hole, the feed thrust of the rotary riveting head pushes the entire pipe fitting to the left, causing the left end face of the pipe fitting to tightly abut against the positioning plate, thus achieving precise axial positioning of the pipe fitting. Next, the abutment cylinder of the fixing assembly actuates, pushing the abutment block downwards, causing the fixing groove on the abutment block to press against the outer wall of the pipe fitting, firmly fixing the pipe fitting in the placement groove. Then, the rotary riveting head itself begins to rotate, rotating while maintaining axial feed pressure, causing uniform plastic deformation of the riveting head, thus firmly riveting it to the inner wall of the pipe fitting. During the riveting process, the left end of the pipe is limited by the positioning plate, the right end is pressed by the rotating riveting head, and the pipe is clamped by the fixing component, ensuring the accuracy of the riveting depth and the stability of the riveting process. With this design, the limiting plate is only responsible for making the pipe slide to a uniform reference position (aligned to the right), while the axial precise positioning is completed by the riveting feed action in conjunction with the positioning plate. Furthermore, the fixing component clamps after positioning is completed, avoiding interference between actions.This ensures that the pipe fittings do not interfere with the positioning plate during cutting, and that each pipe fitting can reliably contact the positioning plate and be firmly fixed before riveting, thereby ensuring the consistency of the riveting position and the stability of the riveting quality.

[0019] The present invention is further configured such that: the riveting joint feeding assembly includes a feeding channel, a mounting bracket is provided on the other side of the positioning plate of the machine body, a feeding plate is vertically provided on the mounting bracket, the feeding plate is provided with a feeding groove that communicates with the feeding channel, a pneumatic chuck is provided below the feeding groove, a mounting hole is provided on one side of the mounting bracket, a cylinder mounting seat is provided on the side wall of the mounting hole, a rodless cylinder and a cylinder slide seat provided on the cylinder mounting seat, a riveting joint slider is provided in the mounting hole that can reciprocate in cooperation with the cylinder slide seat, an L-shaped mounting plate is provided on both sides of the riveting joint slider, and a stop bar that can be inserted into the riveting joint is provided on the L-shaped mounting plate, the two stop bars are arranged vertically.

[0020] Using the above technical solution, the rivet joints are fed into the feeding channel via a vibratory feeder or other feeding device, and then enter the feeding groove on the feeding plate. The feeding groove is vertical, and the rivet joints are arranged downwards in sequence under the action of gravity. The bottom rivet joint is clamped by a pneumatic chuck to prevent it from falling automatically. When the rodless cylinder is activated, the cylinder slide causes the rivet joint slider to slide back and forth in the mounting hole. Two upper and lower stop rods are fixed on the L-shaped mounting plates on both sides of the rivet joint slider. The ends of the two stop rods can be inserted into the inner hole of the rivet joint. When the rivet joint slider slides to one side, the upper stop rod inserts into the inner hole of the second to last rivet joint to block it, while the lower stop rod retracts from the inner hole of the bottom rivet joint. The pneumatic chuck releases, and the bottom rivet joint falls to the riveting position under the action of gravity. When the slider slides in the opposite direction, the lower stop rod inserts into the inner hole of the next rivet joint, the pneumatic chuck clamps it again, the upper stop rod retracts, and the upper rivet joint is allowed to move down one position. By alternating insertion and withdrawal of the upper and lower baffles, combined with the clamping action of the pneumatic chuck, precise single-feeding of only one rivet joint is achieved each time, avoiding heavy material or jamming. The feeding action is reliable and the cycle is controllable.

[0021] The present invention is further configured such that: the riveting assembly includes a servo motor, a ball screw slide, a rotary riveting joint, a linear guide rail, and a slider; the servo motor is connected to the ball screw slide in a transmission manner, the rotary riveting joint is fixedly installed on the sliding end of the ball screw slide, the linear guide rail is disposed on the machine body and is arranged parallel to the ball screw slide, and the slider is slidably assembled on the linear guide rail, and the slider is fixedly connected to the rotary riveting joint.

[0022] Using the above technical solution, after the pipe fitting is clamped by the fixing component and the riveting head feeding component has delivered the riveting head to the riveting position (the riveting head is held by the pneumatic chuck, located between the end of the pipe fitting and the rotary riveting head), the servo motor of the riveting component starts, driving the ball screw slide to perform linear feed motion. The rotary riveting head is fixedly installed on the sliding end of the ball screw slide, and at the same time, the rotary riveting head is also connected to the linear slide rail through the slider, and the linear slide rail is arranged parallel to the ball screw slide. When the ball screw slide pushes the rotary riveting head towards the pipe fitting, the slider slides synchronously on the linear slide rail, which plays an auxiliary guiding and anti-torsion role for the rotary riveting head, ensuring that its feed direction is strictly consistent with the axis of the pipe fitting. The rotary riveting head is first inserted into the inner hole of the riveting head held by the pneumatic chuck, and continues to be pushed forward, causing the riveting head to disengage from the pneumatic chuck; then the rotary riveting head continues to feed towards the pipe fitting with the riveting head, inserting the riveting head into the inner hole of the end of the pipe fitting. Once the riveting head is inserted into place, the rotary riveting head begins to rotate, maintaining axial feed pressure while rotating. This causes uniform plastic deformation, firmly riveting the head to the inner wall of the pipe fitting. After riveting to the designated depth, the servo motor reverses, and the rotary riveting head withdraws from the inner hole and quickly returns to its initial position, ready for the next riveting cycle. Due to the use of ball screw drive, the feed accuracy is high, the movement is smooth, and the riveting depth and feed speed can be precisely controlled by the servo motor. Simultaneously, the cooperation between the linear guide rail and the slider ensures that the rotary riveting head does not wobble during insertion and rotation, thus guaranteeing consistent riveting quality for each pipe fitting.

[0023] The present invention is further configured such that: the fixing component includes an abutting block and an abutting cylinder, a fixing seat is provided on the top of the mounting bracket facing the rotating wheel, an abutting seat is provided below the fixing seat, the abutting cylinder is provided on the fixing seat, the abutting seat is connected to the abutting cylinder through the cylinder shaft, the abutting block is provided below the abutting seat, and the abutting block is provided with a fixing groove adapted to the pipe fitting.

[0024] Using the above technical solution, after the rotating wheel delivers the pipe fitting to the riveting station and completes axial positioning, the abutment cylinder of the fixing component actuates, pushing the abutment seat downwards via the cylinder shaft. The abutment seat drives the abutment block to descend synchronously, causing the fixing groove on the abutment block to press firmly against the outer wall of the pipe fitting. The shape of the fixing groove is adapted to the shape of the pipe fitting (e.g., semi-circular or V-shaped), which can firmly press the pipe fitting into the placement groove of the rotating wheel, preventing the pipe fitting from rotating or axially shifting during the riveting process. After riveting is completed, the abutment cylinder reverses its action, the abutment block lifts up, releasing the pipe fitting, and the rotating wheel can continue to rotate to deliver the finished pipe fitting. The cylinder-driven clamping method has a fast response speed, stable and adjustable clamping force, and does not damage the surface of the pipe fitting, providing stable positioning conditions for high-quality riveting.

[0025] Compared with the prior art, the present invention has the following beneficial effects: By sequentially setting a stepped automatic pipe feeding mechanism and a rotary pipe guiding mechanism on the machine body, and setting a positioning mechanism, a blocking mechanism, and a riveting mechanism including a riveting joint feeding component, a fixing component, and a riveting component on both sides and above the guiding mechanism, a complete integrated automatic production line is formed. The stepped automatic pipe feeding mechanism uses a multi-stage lifting method combined with a slider, along with a hopper length adjustment mechanism, to smoothly and orderly feed pipes of different lengths into the discharge chute, avoiding damage to the pipe surface caused by traditional vibratory feeders. The rotary pipe guiding mechanism uses a placement groove on the rotating wheel that corresponds to the outlet end of the discharge chute. Combined with intermittent indexing rotation driven by a servo motor and double protection from arc-shaped and inclined baffle plates, it achieves single-piece separation, precise receiving, and anti-deviation conveying of pipes. The positioning mechanism uses a manual adjustment method with a handwheel, lead screw, and reversing gearbox to quickly adapt to the axial positioning requirements of pipes of different lengths. The riveting joint feeding assembly uses alternating control of upper and lower double baffle rods to achieve precise single-time feeding of riveting joints, avoiding heavy or jammed materials. The fixing assembly uses a cylinder-driven abutment block and fixing groove to firmly press the pipes together. Combined with a rotary riveting joint driven by a servo motor and ball screw slide, it ensures smooth feeding and uniform riveting, guaranteeing precise control of riveting depth and deformation. In summary, this invention not only achieves fully automated operation from automatic feeding, positioning, and conveying of pipe fittings and rivet joints to riveting completion, significantly improving production efficiency and consistency of riveting quality, but also significantly enhances the equipment's versatility, stability, and reliability through multiple adjustment mechanisms and error-proof designs, meeting the needs of mass production of multi-specification pipe fittings. The embodiments of this invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a perspective view of the present invention; Figure 4 This is a structural diagram of the riveting mechanism in this invention; Figure 5 This is a structural diagram of the riveting mechanism in this invention; Figure 6 This is a structural diagram of the power drive mechanism in this invention; Figure 7 This is a structural diagram of the stepped pipe automatic feeding mechanism in this invention.

[0027] The following are the labeling elements in the figure: Machine body 100, stepped pipe fitting automatic feeding mechanism 1, hopper 11, multi-stage material distribution step assembly 12, first support plate 121, second support plate 122, third support plate 123, fourth support plate 124, guide mechanism 13, first slider 131, second slider 132, third slider 133, power drive mechanism 14, motor 141, eccentric wheel 142, connecting rod 143, crossbeam 144, guide rail 145, guide 146 slider, 147 connecting seat, 148 slider groove, 15 discharge slide, 16 adjusting mechanism, 161 adjusting plate, 162 lead screw, 163 drive shaft, 164 handwheel, 165 mounting base, 166 reversing gearbox assembly, 167 adjusting plate groove, 168 connecting seat, 2 rotary tube guide mechanism, 21 rotating shaft, 22 rotating wheel, 23 servo motor, 24 rotating seat, 25 discharge plate, 221 placement groove, 3 riveting mechanism. The riveting assembly includes: 31, feed channel 311, mounting bracket 312, feed plate 313, feed groove 314, pneumatic chuck 315, cylinder mounting base 317, rodless cylinder 318, cylinder slide 319, riveting slider 320, L-shaped mounting plate 321, stop bar 322, fixing assembly 32, contact block 327, contact cylinder 328, fixing base 323, contact base 324, fixing groove 326, and riveting assembly. 33, riveting servo motor 331, ball screw slide table 332, rotary riveting joint 333, linear slide rail 334, slider 335, positioning mechanism 4, positioning plate 41, positioning screw 42, positioning reversing gearbox assembly 43, positioning transmission shaft 44, positioning handwheel 45, positioning fixed seat 46, material blocking mechanism 5, arc-shaped material blocking plate 51, inclined material blocking plate 52, guide rod 53, limit nut 54, limit plate 55, cylinder 56. Detailed Implementation

[0028] The invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the components in the drawings are for illustrative purposes only, and the actual dimensions and proportions can be adjusted as needed.

[0029] like Figure 1-7 As shown, an automatic pipe riveting machine includes a machine body 100. The machine body 100 is equipped with a stepped automatic pipe feeding mechanism 1 and a rotary pipe guiding mechanism 2. A riveting mechanism 3 is installed on one side of the rotary pipe guiding mechanism 2, a positioning mechanism 4 is installed on the other side of the rotary pipe guiding mechanism 2, and a blocking mechanism 5 is installed above the rotary pipe guiding mechanism 2. The riveting mechanism 3 includes a riveting head feeding assembly 31, a fixing assembly 32, and a riveting assembly 33.

[0030] The stepped automatic pipe feeding mechanism 1 includes an inclined hopper 11, which is formed by a bottom plate, a left side plate, a right side plate, and a rear baffle. The bottom plate of the hopper 11 is inclined at one end (i.e., the end where the multi-stage material distribution step assembly 12 is located) at an angle of 15° to 30°. The multi-stage material distribution step assembly 12 is fixedly installed at the lower end of the hopper 11. The multi-stage material distribution step assembly 12 includes four vertically stepped support plates, which are, from bottom to top, the first support plate 121, the second support plate 122, the third support plate 123, and the fourth support plate 124. All four support plates are fixed to the side wall of the machine body 100 with screws and remain stationary. A vertical gap is left between adjacent support plates. The upper surfaces of the first support plate 121, the second support plate 122, and the third support plate 123 are all inclined, with the inclination consistent with the bottom surface of the hopper 11. The upper surface of the fourth support plate 124 is also inclined, tilting downward toward the discharge chute 15.

[0031] A first slider 131, a second slider 132, and a third slider 133 are respectively installed in the gaps between adjacent support plates. The first slider 131 is located in the gap between the first support plate 121 and the second support plate 122; the second slider 132 is located in the gap between the second support plate 122 and the third support plate 123; and the third slider 133 is located in the gap between the third support plate 123 and the fourth support plate 124. The two side planes of each slider are in contact with the side surfaces of the adjacent support plates and can slide up and down. The top of each slider is made into an inclined surface, and the inclination direction of the inclined surface is consistent with the inclined surface of the lower support plate, so that when the slider rises to be flush with the upper support plate, its inclined surface transitions continuously with the inclined surface of the upper support plate.

[0032] The power drive mechanism 14 includes a motor 141, two eccentric wheels 142 (one on each side), two connecting rods 143 (one on each side), a crossbeam 144, two guide rails 145 vertically fixed to the left and right side walls of the machine body 100, four guide sliders 146 (two on each guide rail), and a connecting seat 147. The motor 141 is a dual-output-shaft motor, with an eccentric wheel 142 keyed to its left and right output shafts respectively. The lower end of a connecting rod 143 is hinged to the eccentric portion of each eccentric wheel 142, and the upper end of the connecting rod 143 is bolted to the end of the crossbeam 144. The crossbeam 144 is horizontally mounted above the motor 141, and both ends of the crossbeam 144 are fixedly connected to the guide sliders 146 via crossbeam mounting seats 1441. The guide sliders 146 are mounted on the guide rails 145 and can slide up and down along the guide rails 145. The connecting seat 147 is a long, plate-like part with three stepped slider grooves 148 on its upper surface, arranged from bottom to top, with the bottom height of the three grooves increasing sequentially. The bottom of the first slider 131 is fitted into the bottommost slider groove, the bottom of the second slider 132 is fitted into the middle slider groove, and the bottom of the third slider 133 is fitted into the topmost slider groove. The middle part of the connecting seat 147 is fixedly connected to the crossbeam 144 with screws. When the motor 141 rotates, the eccentric wheel 142 drives the connecting rod 143 to move up and down reciprocally, thereby driving the crossbeam 144, the connecting seat 147, and the three sliders to move up and down synchronously.

[0033] The adjusting mechanism 16 includes an adjusting plate 161, a lead screw 162, a drive shaft 163, a handwheel 164, a mounting base 165, and a reversing gearbox assembly 166. The adjusting plate 161 is placed inside the hopper 11, parallel to the side plate of the hopper 11. On the side of the adjusting plate 161 facing the inside of the hopper, three stepped adjusting plate slots 167 are formed from top to bottom. The heights of the three slots correspond to the installation heights of the first support plate 121, the second support plate 122, and the third support plate 123, respectively. The first support plate 121, the second support plate 122, and the third support plate 123 extend into their respective adjusting plate slots. The mounting base 165 is fixed to the outer wall of the hopper 11, and the reversing gearbox assembly 166 is installed inside the mounting base 165. The reversing gearbox assembly 166 is a set of bevel gears, with its input shaft connected to the drive shaft 163 and its output shaft connected to the lead screw 162. The lead screw 162 passes through a hole in the side wall of the hopper, and its front end is fixedly connected to the adjusting plate 161 via a connecting seat 168. A handwheel 164 is fixed to the outer end of the drive shaft 163. When the handwheel 164 is turned, power is transmitted to the lead screw 162 through the drive shaft 163 and the reversing gearbox assembly 166. The lead screw 162 rotates and moves axially, thereby pushing the adjusting plate 161 to move left and right, changing the effective length of the hopper 11.

[0034] The rotary pipe guide mechanism 2 includes a horizontally arranged rotating shaft 21, two rotating wheels 22 (one on each side) fixedly mounted on the rotating shaft 21, a servo motor 23, and a rotating base 24. The servo motor 23 is fixed to one side of the machine body 100, and its output shaft is connected to one end of the rotating shaft 21 via a coupling. The other end of the rotating shaft 21 is mounted in the rotating base 24 via bearings, and the rotating base 24 is fixed to the other side of the machine body 100. Multiple semi-circular placement slots 221 are evenly distributed along the circumference of each of the two rotating wheels 22. The placement slots 221 on the left and right rotating wheels 22 correspond one-to-one, jointly supporting both ends of a pipe. The outlet end (i.e., the lowest end) of the discharge chute 15 corresponds to the placement slot on the rotating wheel, allowing the pipe to fall directly into the placement slot when it reaches the lowest point.

[0035] Below the rotary wheel 22, an inclined discharge plate 25 is fixedly installed. The higher end of the discharge plate 25 is close to the center line of the rotary wheel 22, and the lower end extends outward from the machine body 100. The upper surface of the discharge plate 25 is a smooth inclined surface with an inclination angle of 20° to 40°, so that when the placement trough 221 rotates downward, the pipe can fall freely and land on the discharge plate 25.

[0036] The positioning mechanism 4 includes a positioning plate 41, a positioning lead screw 42, a positioning reversing gearbox assembly 43, a positioning transmission shaft 44, and a positioning handwheel 45. A positioning fixing seat 46 is fixed to the side wall of the machine body 100, and the positioning reversing gearbox assembly 43 is mounted on the positioning fixing seat 46. The positioning reversing gearbox assembly 43 also contains a pair of bevel gears; its input shaft is connected to the positioning transmission shaft 44, and its output shaft is connected to the positioning lead screw 42. The outer end of the positioning lead screw 42 is threaded to the center of the positioning plate 41. The end face of the positioning plate 41 is a flat metal plate, facing the end of the pipe fitting. The outer end of the positioning transmission shaft 44 is fixed with the positioning handwheel 45. Rotating the positioning handwheel 45 adjusts the axial position of the positioning plate 41, thus accommodating pipe fittings of different lengths. The positioning lead screw 42 has a small pitch, is self-locking, and its position remains stable after adjustment.

[0037] The material blocking mechanism 5 includes an arc-shaped baffle plate 51, an inclined baffle plate 52, a guide rod 53, a limiting plate 55, and a cylinder 56. The arc of the arc-shaped baffle plate 51 is consistent with the outer arc of the rotating wheel 22. The inner arc surface of the arc-shaped baffle plate 51 maintains a gap of 1mm to 2mm with the outer arc surface of the rotating wheel 22. The arc-shaped baffle plate 51 extends from the top of the rotating wheel 22 to the side, covering the opening side of the placement slot 221. The inclined baffle plate 52 is integrally formed with the arc-shaped baffle plate 51. The inclined baffle plate 52 covers the top of the discharge slide 15, and its inclined surface is parallel to the inclined surface of the discharge slide 15. The integrally formed baffle plate is fixed to the side wall of the machine body 100 by the guide rod 53 and the limiting nut 54. The guide rod 53 is a threaded rod, and the height of the baffle plate can be adjusted by rotating the limiting nut 54.

[0038] A long groove is formed on the side of the discharge chute 15, and a limiting plate 55 extends into the discharge chute 15 through this groove. The limiting surface of the limiting plate 55 is inclined and parallel to the inclined surface of the discharge chute 15. The rear end of the limiting plate 55 is fixedly connected to the piston rod of the cylinder 56. The cylinder 56 is a double-acting cylinder and is installed on the rear side of the machine body 100. According to the length of the pipe, the cylinder 56 drives the limiting plate 55 to move laterally along the discharge chute 15 to a preset position and remain stationary; when the pipe slides down from the discharge chute 15, its right end naturally abuts against the limiting surface of the limiting plate 55, achieving right-end alignment without the need for the cylinder to push the material back and forth.

[0039] The rivet joint feeding assembly 31 includes a feeding channel 311, a mounting bracket 312, a feeding plate 313, a pneumatic chuck 315, a rodless cylinder 318, a rivet joint slider 320, two L-shaped mounting plates 321, and two stop rods 322. The feeding channel 311 is a metal slide, with one end connected to an external vibratory feeder and the other end connected to the feeding groove 314 on the feeding plate 313. The feeding plate 313 is vertically fixed on the mounting bracket 312. The feeding groove 314 is a vertical through groove with a length slightly larger than the outer diameter of the rivet joint. The pneumatic chuck 315 is installed below the feeding groove 314, and its grippers normally clamp the middle of the bottommost rivet joint.

[0040] A horizontal mounting hole is provided on one side of the mounting bracket 312. A cylinder mounting seat 317 is fixed to the upper wall of the mounting hole by screws, and a rodless cylinder 318 is mounted on the cylinder mounting seat 317. The cylinder slide (319) of the rodless cylinder 318 is fixedly connected to the rivet head slider (320). L-shaped mounting plates 321 extend from both sides of the rivet head slider 320, and a stop rod 322 is fixed to the end of each of the two L-shaped mounting plates 321. The two stop rods 322 are arranged parallel to each other vertically, with a spacing equal to the height of one rivet head. The diameter of the stop rod 322 is smaller than the inner diameter of the rivet head, allowing it to be inserted freely.

[0041] The rodless cylinder 318 has two working positions: when the cylinder slide 319 is on one side, the upper stop rod is inserted into the inner hole of the second-to-last rivet joint, and the lower stop rod is withdrawn from the inner hole of the lowest rivet joint; when the cylinder slide 319 is on the other side, the upper stop rod is withdrawn, and the lower stop rod is inserted into the inner hole of the next rivet joint. By controlling the reciprocating motion of the rodless cylinder 318, in conjunction with the clamping and releasing action of the pneumatic chuck 315, one rivet joint is released at a time.

[0042] The fixing assembly 32 includes an abutment block 327, an abutment cylinder 328, a fixing seat 323, and an abutment seat 324. The fixing seat 323 is fixed to the top of the mounting bracket 312 facing the rotating wheel 22. The abutment cylinder 328 is vertically mounted on the fixing seat 323, and the piston rod of the abutment cylinder 328 passes downward through the fixing seat 323 and is fixedly connected to the abutment seat 324. The abutment block 327 is fixed to the lower part of the abutment seat 324 by screws. A semi-circular fixing groove 326 matching the shape of the pipe fitting is formed on the lower surface of the abutment block 327. When the abutment cylinder 328 is vented, the piston rod pushes the abutment seat 324 and the abutment block 327 downward, pressing the pipe fitting into the placement groove 221 of the rotating wheel 22.

[0043] The riveting assembly 33 includes a servo motor 331, a ball screw slide 332, a rotary riveting head 333, a linear guide rail 334, and a slider 335. The servo motor 331 is connected to the input end of the ball screw slide 332 via a coupling. The rotary riveting head 333 is fixedly mounted on the slide (i.e., the moving end) of the ball screw slide 332. The rotary riveting head 333 is a pneumatic or electric rotary head with a conical or cylindrical front end, which can be inserted into the inner hole of the riveting head and rotate it. The linear guide rail 334 is mounted on the machine body 100 and parallel to the ball screw slide 332. The slider 335 is slidably mounted on the linear guide rail 334. The slider 335 is fixedly connected to the housing of the rotary riveting head 333 via a connecting plate, serving to assist in guidance and prevent the rotary riveting head 333 from rotating on its own.

[0044] The working process of this invention is as follows: See Figures 1 to 7 In operation, the operator first adjusts the hopper length according to the pipe length: turning the handwheel 164 drives the lead screw 162 to rotate via the reversing gearbox assembly 166, pushing the adjusting plate 161 to move, thereby adjusting the hopper length. Then, the motor 141 is started, which drives the eccentric wheel 142 to rotate, which in turn drives the crossbeam 144 and the connecting seat 147 to move up and down reciprocally via the connecting rod 143. The first slider 131, the second slider 132, and the third slider 133 rise and fall synchronously.

[0045] A batch of pipe fittings is poured into the hopper 11. Under gravity, the fittings roll onto the first support plate 121 and accumulate along the inclined surface. When the first slider 131 rises, the inclined surface of the support plate and the inclined surface of the first slider meet the requirement of fittings of the same diameter. Therefore, when lifted, the fitting rolls from the inclined surface of the first support plate onto the first slider. The first slider slides upward to the height of the second support plate. Then, the first slider 131 descends, and the fitting rolls onto the inclined surface of the second support plate 122, continuing to roll to the root of the inclined surface of the second slider 132. Next, the second slider 132 rises, carrying the fitting to the third support plate 123, where it also rolls. The third slider 133 rises, carrying the fitting to the fourth support plate 124. The inclined surface of the fourth support plate 124 slopes towards the discharge chute 15, and the fitting automatically rolls into the discharge chute 15.

[0046] Based on the pipe length, the limiting plate 55 is pre-positioned to match the pipe length using cylinder 56. The pipe slides down the discharge chute 15, and under gravity, its right end naturally slides to contact the limiting plate 55, automatically aligning the right end. During this process, cylinder 56 remains stationary and requires no action. The pipe continues to slide down and falls into the placement groove 221 of the rotating wheel 22. At this point, a small gap is maintained between the left end of the pipe and the positioning plate 41.

[0047] Servo motor 23 drives rotary wheel 22 to rotate one division (the angle between two adjacent placement slots) each time, delivering the fitting to the riveting station. Simultaneously, the riveting head feeding assembly 31 begins operation: rodless cylinder 318 actuates, the upper stop rod inserts into the inner hole of the second-to-last riveting head, the lower stop rod retracts, the pneumatic chuck 315 releases, and the lowest riveting head falls to the pneumatic chuck by gravity (the pneumatic chuck's chuck is directly facing the forward direction of the rotating riveting head 333). Then, rodless cylinder 318 reverses direction, the lower stop rod inserts into the inner hole of the next riveting head, the pneumatic chuck 315 clamps it, the upper stop rod retracts, and the upper riveting head falls one division, completing the feeding process.

[0048] Once the pipe fitting is in place, the fixing assembly 32 is not clamped. The riveting assembly 33 is activated: the servo motor 331 drives the ball screw slide 332 forward, and the rotary riveting head 333 moves towards the pipe fitting under the guidance of the linear slide rail 334. The front end of the rotary riveting head 333 first inserts into the inner hole of the riveting head at the pneumatic chuck 315, pushing the riveting head away from the pneumatic chuck 315, and then continues to move forward with the riveting head, inserting the riveting head into the inner hole of the end of the pipe fitting. During the insertion process, after the front end of the riveting head contacts the end of the pipe fitting, the rotary riveting head 333 continues to feed, pushing the pipe fitting to the left until the left end face of the pipe fitting abuts against the positioning plate 41. At this time, the pipe fitting is precisely positioned axially.

[0049] After positioning, the abutment cylinder 328 of the fixing component 32 actuates, and the abutment block 327 descends to press the pipe fitting. Then, the rotary riveting joint 333 begins to rotate, while the ball screw slide 332 continues to feed at the set pressure, causing the riveting joint to undergo uniform plastic deformation and firmly rivet to the inner wall of the pipe fitting. After riveting to the set depth, the servo motor 331 reverses, the rotary riveting joint 333 retracts, and quickly returns to its initial position. The fixing component 32 releases, and the rotating wheel 22 continues to rotate one division.

[0050] When the placement trough 221 containing the finished pipe fittings rotates to a position directly below the rotating wheel 22, the opening of the placement trough 221 faces downwards. The finished pipe fittings automatically fall off under gravity, landing on the inclined discharge plate 25 and rolling out along the slope into the finished product collection box. The rotating wheel 22 continues to rotate, repeating the above cycle.

[0051] In summary, the automatic pipe riveting machine provided by the present invention forms a complete integrated automatic production line by sequentially arranging a stepped automatic pipe feeding mechanism and a rotary pipe guiding mechanism on the machine body, and arranging a positioning mechanism, a blocking mechanism, and a riveting mechanism including a riveting head feeding component, a fixing component, and a riveting component on both sides and above the guiding mechanism. The stepped feeding mechanism uses multi-stage steps and sliders for lifting, combined with a hopper length adjustment mechanism, to smoothly and orderly feed pipes of different lengths into the discharge chute, avoiding damage to the pipe surface from the vibratory feeder. The rotary guiding mechanism uses a placement groove on the rotating wheel that corresponds to the outlet end of the discharge chute. Combined with intermittent indexing rotation driven by a servo motor and double protection from arc-shaped and inclined baffle plates, it achieves single-piece separation, precise acceptance, and anti-deviation conveying of pipes. The positioning mechanism uses a manual adjustment method with a handwheel, lead screw, and reversing gearbox, which can quickly adapt to the axial positioning requirements of pipes of different lengths. The riveting joint feeding assembly uses alternating control of upper and lower double baffles to achieve precise single-time feeding of the riveting joint, avoiding heavy material or jamming. The fixing assembly uses a cylinder-driven abutment block and fixing groove to firmly press the pipes, and works with a rotary riveting joint driven by a servo motor and ball screw slide table to ensure smooth feeding and uniform riveting, ensuring precise control of riveting depth and deformation. This invention not only realizes fully automated operation of the entire process from automatic feeding, positioning, and conveying of pipe fittings and rivets to completion of riveting, greatly improving production efficiency and consistency of riveting quality, but also significantly enhances the versatility, stability and reliability of the equipment through multiple adjustment mechanisms and error-proof design, and can meet the needs of mass production of multi-specification pipe fittings.

[0052] Please note to all technical personnel: Although the present invention has been described according to the specific embodiments above, the inventive concept of the present invention is not limited to this invention. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. An automatic pipe riveting machine, characterized in that: The system includes an organic body (100), on which a stepped automatic pipe feeding mechanism (1) and a rotary pipe guiding mechanism (2) are sequentially arranged. One side of the pipe guiding mechanism (2) is provided with a riveting mechanism (3) for automatically riveting pipes, and the other side is provided with a positioning mechanism (4) for positioning pipes. Above the pipe guiding mechanism (2) is a baffle mechanism (5) to prevent pipes from deviating. The riveting mechanism (3) includes a riveting head feeding assembly (31) for automatically feeding the riveting head, a fixing assembly (32) for fixing the pipes, and a riveting assembly (33) for automatically riveting the riveting head into the pipe. The stepped automatic pipe feeding mechanism (1) includes... The hopper (11) is inclined, a multi-stage material distribution step assembly (12) is located at one end of the hopper (11), a guide mechanism (13) that cooperates with the multi-stage material distribution step assembly (12) for feeding, and a power drive mechanism (14) that drives the guide mechanism (13). The top of the multi-stage material distribution step assembly (12) is provided with an inclined discharge slide (15). One side of the hopper (11) is provided with an adjustment mechanism (16) for adjusting the length of the hopper. The multi-stage material distribution step assembly (12) includes a first support plate (121), a second support plate (122), a third support plate (123), and a fourth support plate (124) arranged in a stepped manner from bottom to top. A gap is formed between two adjacent support plates. The tops of the first support plate (121), the second support plate (122), the third support plate (123), and the fourth support plate (124) are respectively inclined; the guide mechanism (13) includes a first slider (131), a second slider (132), and a third slider (133); the first slider (131) is disposed in the gap between the first support plate (121) and the second support plate (122), the second slider (132) is disposed in the gap between the second support plate (122) and the third support plate (123), and the third slider (133) is disposed in the gap between the third support plate (123) and the fourth support plate (124), and the first slider (131), the second slider (132), and the third slider (133) are respectively inclined at the tops of the first support plate (121), the second slider (122), and the third slider (133) are respectively inclined at the tops of the first support plate (121) and the second support plate (122). 32) and the third slider (133) are respectively attached to the adjacent support plate on both sides; the top of the first slider (131), the second slider (132) and the third slider (133) are respectively inclined; the power drive mechanism (14) includes a motor (141), an eccentric wheel (142), a connecting rod (143) and a crossbeam (144) located at the bottom of the body (100); the eccentric wheel (142) is located on the motor shaft on both sides of the motor (141), the connecting rod (143) is located on the other end of the eccentric wheel (142) facing the motor (141), and the crossbeam (144) is mounted above the motor (141) and the two ends of the crossbeam (144) are respectively connected to the connecting rods (143) on both sides;The inner walls on both sides of the body (100) are provided with guide rails (145), and at least one guide slider (146) is provided on the guide rail (145) and slides with it; the crossbeam (144) is connected to the guide slider (146) through a connecting seat (147); the connecting seat (147) is provided with slider grooves arranged in a stepped manner from bottom to top, and the bottoms of the first slider (131), the second slider (132) and the third slider (133) are respectively located in the corresponding slider grooves. The pipe guide mechanism (2) includes a rotating shaft (21) and two rotating wheels (22) mounted on the rotating shaft (21). A servo motor (23) is provided on one side of the machine body (100). One end of the rotating shaft (21) is connected to the servo motor (23), and the other end is connected to the other side of the machine body (100) through a rotating seat (24). The rotating wheels (22) are provided with at least one placement groove (221) for placing pipes. The outlet end of the discharge chute (15) is connected to the placement groove (221) on the rotating wheel (22). 1) Correspondingly, the machine body (100) is provided with a discharge plate (25) on the other end facing the discharge chute (15). The discharge plate (25) is inclined and located below the turntable (22). A baffle mechanism (5) to prevent the pipe from falling is provided above the turntable (22). The positioning mechanism (4) includes a positioning plate (41) that can abut against the pipe, a positioning screw (42) connected to the positioning plate (41), a positioning reversing gearbox assembly (43) connected to the positioning screw (42), and a positioning... The reversing gearbox assembly (43) is connected to a positioning drive shaft (44) and a positioning handwheel (45). A positioning fixing seat (46) is provided on the side wall of the machine body (100). The positioning reversing gearbox assembly (43) is mounted on the positioning fixing seat (46). A positioning screw (42) is connected to the positioning reversing gearbox assembly (43) and fixed to a positioning plate (41). The positioning drive shaft (44) is connected to the positioning reversing gearbox assembly (43), and the end of the positioning drive shaft (44) is connected to the positioning handwheel (45).

2. The automatic pipe riveting machine according to claim 1, characterized in that: The adjustment mechanism (16) includes an adjustment plate (161), at least one lead screw (162) connected to the adjustment plate (161), a transmission shaft (163) connected to the lead screw (162), and a handwheel (164) connected to the transmission shaft (163). The adjustment plate (161) is located inside the hopper (11) and parallel to the side plate of the hopper (11). The adjustment plate (161) has adjustment plate grooves arranged in a stepped manner from bottom to top. The first support plate (121), the second support plate (122), and the third support plate (164) are all part of the adjustment mechanism. The three support plates (123) are respectively placed in the corresponding adjustment slots. One of the side plates of the hopper (11) is provided with a mounting seat (165). The mounting seat (165) is provided with a reversing gearbox assembly (166). The lead screw (162) is connected to the reversing gearbox assembly (166) and extends into the hopper (11) and is connected to the adjustment plate (161) through a connecting seat (147). The drive shaft (163) is connected to the reversing gearbox assembly (166) and the handwheel (164) is connected to the end of the drive shaft (163).

3. The automatic pipe riveting machine according to claim 1, characterized in that: The material blocking mechanism (5) includes a material blocking plate, which includes an arc-shaped material blocking plate (51) mounted above the rotating wheel (22) and consistent with the arc of the rotating wheel (22) and an inclined material blocking plate (52) extending above the discharge slide (15) and consistent with the inclined surface of the discharge slide (15). A guide rod (53) is provided on the side wall of the machine body (100). The arc-shaped material blocking plate (51) and the inclined material blocking plate (52) are integrally formed and provided on the guide rod (53) and fixed by a limiting nut (54). A limiting plate (55) is provided on one side of the discharge slide (15). The limiting plate (55) is an inclined limiting plate consistent with the inclined surface of the discharge slide (15). A cylinder (56) is provided on one side of the machine body (100) where the positioning plate (41) is provided. The limiting plate (55) is connected to the cylinder (56) through the cylinder shaft.

4. The automatic pipe riveting machine according to claim 1, characterized in that: The rivet feeding assembly (31) includes a feeding channel (311). The machine body (100) is provided with a mounting bracket (312) on the other side of the positioning plate (41). A feeding plate (313) is vertically mounted on the mounting bracket (312). The feeding plate (313) is provided with a feeding groove (314) that communicates with the feeding channel (311). A pneumatic chuck (315) is provided below the feeding groove (314). A mounting hole is provided on one side of the mounting bracket (312). A cylinder is provided on the side wall of the mounting hole. Mounting base (317), cylinder mounting base (317) is provided with rodless cylinder (318) and cylinder slide (319) provided on rodless cylinder. A rivet head slider (320) is provided in the mounting hole, which can reciprocate and slide in the mounting hole and cylinder slide (319). L-shaped mounting plates (321) are provided on both sides of the rivet head slider (320). The L-shaped mounting plates (321) are provided with stop rods (322) that can be inserted into the rivet head. The two stop rods (322) are arranged vertically.

5. The automatic pipe riveting machine according to claim 1, characterized in that: The riveting assembly (33) includes a riveting servo motor (331), a ball screw slide (332), a rotary riveting joint (333), a linear slide rail (334), and a slider (335). The riveting servo motor (331) is connected to the ball screw slide (332) for transmission. The rotary riveting joint (333) is fixedly installed on the sliding end of the ball screw slide (332). The linear slide rail (334) is located on the machine body (100) and is arranged parallel to the ball screw slide (332). The slider (335) is slidably mounted on the linear slide rail (334), and the slider (335) is fixedly connected to the rotary riveting joint (333).

6. An automatic pipe riveting machine according to claim 5, characterized in that: The fixing component (32) includes an abutment block (327) and an abutment cylinder (328). The mounting bracket (312) has a fixing seat (323) at the top of the end facing the rotating wheel (22). An abutment seat (324) is provided below the fixing seat (323). The abutment cylinder (328) is located on the fixing seat (323). The abutment seat (324) is connected to the abutment cylinder (328) through a cylinder shaft. The abutment block (327) is located below the abutment seat (324). The abutment block (327) has a fixing groove (326) that is compatible with the pipe fitting.

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