Cylindrical workpiece positioning device for welding machining

Abstract

The invention provides a cylindrical workpiece positioning device for welding machining, and relates to the technical field of welding equipment. The welding bottom frame is fixedly installed on the welding rack, the disc-shaped welding rotary table is rotatably installed on the welding bottom frame, the motor is fixedly installed at the position, below the welding rotary table, of the bottom of the welding bottom frame, the motor drives the welding rotary table to rotate, and four welding stations are annularly distributed at the positions, close to the annular edge, of the welding stations. The mechanical linkage design (connecting feeler levers press control holes to enable the stop pieces to dive) of the stop pieces at the tail end of the conveying slide way and the transfer pushing frame achieves physical isolation of workpiece queues, and it is guaranteed that only one workpiece enters a pushing area every time; a double-plate structure (inclined cutting guiding of an inner side plate and guiding of a guide strip clamping groove of an outer side plate) of the transfer pushing frame is combined with an L-shaped pushing piece at the bottom and a pressing plate at the top, full-surrounding three-dimensional constraint on the workpiece is formed, the rolling or toppling risk in the pushing process is thoroughly eliminated, and it is guaranteed that the workpiece stably slides into a butt joint opening.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a cylindrical workpiece positioning device for welding processing. Background Art

[0002] During the welding process of cylindrical workpieces, traditional positioning methods often face significant challenges. Manual loading and positioning is inefficient and inconsistent. For example, in patent application number CN201210587436.6, an automatic feeding device for cylindrical parts is disclosed. Existing automated equipment is prone to positional displacement or tipping due to rolling during the transfer of cylindrical workpieces, affecting welding accuracy. Especially in continuous welding scenarios, the automatic separation and precise alignment technology of the workpiece queues has not yet been perfected, and additional complex stops and clamping mechanisms are often required, which not only increases the complexity of the equipment, but also easily causes material jamming failures. In addition, it is difficult to adjust the adaptability for workpieces of different diameters, and frequent replacement of fixtures seriously affects production efficiency. There is also room for optimization in the coordinated control of the welding turntable and the conveying system. There is an urgent need for an efficient integrated solution that can achieve automatic separation, stable transfer, precise positioning and continuous welding of cylindrical workpieces. Summary of the Invention

[0003] The present invention relates to a cylindrical workpiece positioning device for welding processing. It replaces complex electronic control with mechanical linkage and optimizes positioning stability through geometric constraints. While improving welding efficiency by more than 30%, it controls the workpiece position repeatability within ±0.2mm, significantly reducing the scrap rate, and providing a high-reliability solution for batch welding of cylindrical workpieces.

[0004] The present invention provides a cylindrical workpiece positioning device for welding processing, which specifically comprises: a welding base; the welding base is fixedly mounted on the welding frame, a disc-shaped welding turntable is rotatably mounted on the welding base, a motor is fixedly mounted on the bottom of the welding base below the welding turntable, the motor drives the welding turntable to rotate, and four welding stations are distributed in a ring near the edge of the ring; a conveying slide is provided on the welding base on one side of the welding turntable along the tangent direction of the welding turntable, and a docking port for a single cylindrical workpiece to pass through is provided at the position where the conveying slide and the welding turntable are connected. A groove is vertically provided on the side of the conveying slide opposite to the docking interface, and the groove is opposite to the middle of the docking interface; a transfer push rack is provided above the groove, and a pressure plate is provided on the upper end of the transfer push rack. A cylinder is also provided on the welding base frame, and the piston rod of the cylinder is fixedly connected to the transfer push rack, which is used to push the transfer push rack to push the single cylindrical workpiece in the conveying slide from the docking interface to the welding station on the welding turntable. The cylindrical workpieces are arranged in order in the conveying slide from the end away from the docking interface; a control box is fixedly mounted on one side of the welding base frame; a stopper is vertically provided in the bottom plate of the conveying slide on the inner side of the middle part of the docking interface.

[0005] Optionally, the welding station is a "J"-shaped structure, with the open end of the welding station facing the edge of the welding turntable.

[0006] Optionally, a "child"-shaped positioning clamp is correspondingly provided on the bottom surface of the welding turntable below the welding station, and the flared end of the positioning clamp faces the docking port of the conveying slide.

[0007] Optionally, an end baffle is fixed vertically upward at the end of the conveying slide at one end where the docking port is located. The end baffle is higher than the inner side wall of the conveying slide and has two slots horizontally provided on the side facing the docking port. When one end of a single cylindrical workpiece rests against the end baffle, the transfer push frame moves toward the docking port to push the cylindrical workpiece out of the docking port.

[0008] Optionally, the left and right ends of the transfer push frame are respectively vertically provided with an inner plate and an outer plate, the inner plate is away from the end baffle, the inner plate is distributed on the inner and outer sides of the transfer push frame, the outer plate is sliding tangent to the inner wall of the end baffle, the outer plate is distributed on the inner side of the transfer push frame, the outer wall of the outer plate is provided with a guide bar and is slidably engaged with the card slot, the end of the inner plate close to the docking interface is a bevel structure, and a cylindrical workpiece is accommodated between the inner plate and the outer plate.

[0009] The lower end of the transfer push frame is fixed vertically downward with an "L"-shaped push piece, which is vertically opposite to the strip groove, and the two groove edges at the outer ends of the strip groove are chamfered structures. The lower end of the push piece is fixed with a horizontal connecting rod, which passes through the bottom of the conveying slide, and the end of the connecting rod is a downward bevel structure. The conveying slide is provided with a hanging block for sliding the connecting rod, and a limit switch is provided on the outer wall of the conveying slide below the strip groove. The limit switch is horizontally opposite to the connection between the push piece and the connecting rod. When the transfer push frame moves toward one side of the welding turntable, the push piece cooperates with the transfer push frame to form a vertical contact surface with the transferred cylindrical workpiece that is not easy to be pushed over. The bottom inner end of the pressure plate is a sloped structure, and the pressure plate synchronously enters above the cylindrical workpiece. When the connection between the push piece and the connecting rod is squeezed by the limit switch, that is, when the cylindrical workpiece enters the welding station, the cylinder resets.

[0010] Optionally, the middle part of the pressure plate is vertically rotated and screwed to the lifting screw, and the lower end of the lifting screw is vertically rotated and connected to the upper end of the transfer push frame. Guide rods are also vertically fixed on the transfer push frames on the left and right sides of the lifting screw. The upper ends of the guide rods are vertically slidably connected to the pressure plate, and the height of the pressure plate is adjusted to adapt to cylindrical workpieces of different heights.

[0011] Optionally, stop wings are vertically provided on the left and right sides of the stopper at the bottom of the conveying slide, and a rectangular control hole is opened on the stopper in accordance with the moving direction of the connecting contact rod. Pull plates are vertically provided on the left and right ends of the bottom of the stopper, and a tension spring is provided on the pull plate. The other end of the tension spring is fixedly connected to the bottom of the conveying slide. The tension spring provides an upward pulling force for the stopper, and the protruding part of the stopper is used to stop the cylindrical workpiece that enters the pushable range of the transfer push rack from moving outward.

[0012] Optionally, when the connecting rod follows the movement of the transfer push frame, the connecting rod first passes through the control hole, presses the stopper to move downward, and the upper end of the stopper is immersed in the bottom plate of the conveying slide. The cylindrical workpiece can be pushed out, and the connecting rod continues to move through the channel between the positioning clamps at the bottom of the welding turntable. The welding station on the welding turntable is further aligned with the docking interface. After welding, the motor drives the welding turntable to rotate ninety degrees each time as a working unit.

[0013] The present invention provides a cylindrical workpiece positioning device for welding processing, which has the following beneficial effects: 1. The mechanical linkage design of the stopper at the end of the conveying slide and the transfer pusher in the present invention (the contact rod presses the control hole to make the stopper dive) realizes the physical isolation of the workpiece queue, ensuring that only a single workpiece enters the pushing area at a time; the double-plate structure of the transfer pusher (the inner plate bevel guide and the outer plate guide bar slot guide) combined with the "L"-shaped pusher at the bottom and the pressure plate at the top forms a fully enclosed three-dimensional constraint on the workpiece, completely eliminating the risk of rolling or tipping during the pushing process, and ensuring that the workpiece slides smoothly into the docking port.

[0014] 2. The "J"-shaped welding station on the welding turntable of the present invention and the "child"-shaped positioning clamp at the bottom form a collaborative positioning structure, which automatically forms a three-point clamp when the workpiece is embedded, effectively resisting welding vibration; the pressure plate can achieve stepless height adjustment through the lifting screw and guide rod, which can quickly adapt to the top clamping requirements of workpieces of different diameters, greatly improving the versatility of the equipment.

[0015] 3. The contact rod in this invention simultaneously triggers the limit switch during movement (the cylinder resets when the pusher contacts it), precisely controlling the workpiece's position. After welding, the motor drives the turntable to precisely rotate 10°, automatically aligning the next empty workstation with the conveyor slide. The welded workpiece is simultaneously removed from the work area, achieving a fully automated "loading-positioning-welding-rotation" cycle. The control box centrally coordinates the cylinder, motor, and limit signals, ensuring seamless operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0017] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached figure: Figure 1 shows a schematic diagram of the first axial view of the present invention; Figure 2 shows a second axial structural schematic diagram of the present invention; Figure 3 shows a schematic structural diagram of the third axis view of the present invention; Figure 4 It shows the schematic diagram of the upper axis structure of the welding turntable and the conveying slideway part of the present invention; Figure 5 It shows the schematic diagram of the lower axis structure of the welding turntable and transfer push frame of the present invention; Figure 6 The present invention shows Figure 5 A in the middle is a schematic diagram of the structure of the enlarged part; Figure 7 It shows an axial structural schematic diagram of the transfer pusher and the conveying slide in a state where the transfer pusher and the conveying slide are separated; Figure 8 It shows the schematic axial structure diagram of the transfer push frame and the pressing plate of the present invention; Figure 9 The figure shows an axial structural diagram of the stopper and the conveying slide in a state where the stopper is separated from the conveying slide.

[0019] List of reference numerals: 1. Welding chassis; 2. Welding turntable; 21. Welding station; 22. Motor; 23. Positioning clamp; 3. Conveyor slide; 31. End stopper; 311. Card slot; 32. Docking port; 33. Slot; 34. Hanging block; 35. Limit switch; 4. Cylinder; 5. Cylindrical workpieces; 6. Transfer pusher; 61. Inner plate; 63. Pusher; 631. Contact rod; 64. Outer plate; 641. Guide bar; 7. Control box; 8. Pressing plate; 81. Lifting screw; 82. Guide rod; 9. Stopper; 91. Stop wing; 92. Control hole; 93. Pull plate; 94. Tension spring. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please refer to Figures 1 to 9 : Embodiment 1: The present invention proposes a cylindrical workpiece positioning device for welding processing, comprising: a welding chassis 1; the welding chassis 1 is fixedly mounted on a welding frame, a disc-shaped welding turntable 2 is rotatably mounted on the welding chassis 1, a motor 22 is fixedly mounted on the bottom of the welding chassis 1 below the welding turntable 2, the motor 22 drives the welding turntable 2 to rotate, and four welding stations 21 are distributed in a ring near the edge of the ring; a conveying slide 3 is provided on the welding chassis 1 on one side of the welding turntable 2 along the tangent direction of the welding turntable 2, and a docking port 32 for a single cylindrical workpiece 5 to pass through is opened at the position where the conveying slide 3 and the welding turntable 2 are opposite. The conveying slide 3 A strip groove 33 is vertically opened on the side opposite to the docking port 32, and the strip groove 33 is opposite to the middle of the docking port 32; a transfer push rack 6 is provided above the strip groove 33, and a pressure plate 8 is provided on the upper end of the transfer push rack 6. A cylinder 4 is also provided on the welding base 1, and the piston rod of the cylinder 4 is fixedly connected to the transfer push rack 6, which is used to push the transfer push rack 6 to push the single cylindrical workpiece 5 in the conveying slide 3 from the docking port 32 to the welding station 21 on the welding turntable 2. The cylindrical workpieces 5 are arranged in order in the conveying slide 3 from the end away from the docking port 32; a control box 7 is fixedly mounted on one side of the welding base 1; a stopper 9 is vertically provided in the bottom plate of the conveying slide 3 on the inner side of the middle part of the docking port 32.

[0022] The welding station 21 is a "J"-shaped structure, and the open end of the welding station 21 faces the edge of the welding turntable 2.

[0023] A “child”-shaped positioning clamp 23 is correspondingly provided on the bottom surface of the welding turntable 2 below the welding station 21 , and the flared end of the positioning clamp 23 faces the docking port 32 of the conveying slide 3 .

[0024] Among them, an end baffle 31 is fixed vertically upward at the end of the conveying slide 3 at one end where the docking port 32 is located. The end baffle 31 is higher than the inner side wall of the conveying slide 3 and has two slots 311 horizontally opened toward the docking port 32. When one end of a single cylindrical workpiece 5 rests against the end baffle 31, the transfer pusher 6 moves toward the docking port 32 to push the cylindrical workpiece 5 out of the docking port 32.

[0025] Among them, the left and right ends of the transfer push frame 6 are respectively vertically provided with an inner plate 61 and an outer plate 64, the inner plate 61 is away from the end baffle 31, and the inner plate 61 is distributed on the inner and outer sides of the transfer push frame 6, the outer plate 64 is tangent to the inner wall of the end baffle 31 in a sliding manner, and the outer plate 64 is distributed on the inner side of the transfer push frame 6, and a guide bar 641 is provided on the outer wall of the outer plate 64 to slide and engage with the card groove 311, and the end of the inner plate 61 close to the docking port 32 is a bevel structure, and a cylindrical workpiece 5 is accommodated between the inner plate 61 and the outer plate 64.

[0026] Among them, the lower end of the transfer push frame 6 is fixed with an "L"-shaped push piece 63 vertically downward, the push piece 63 is vertically opposite to the strip groove 33, and the two outer groove edges of the strip groove 33 are chamfered structures. The lower end of the push piece 63 is fixed with a horizontal contact rod 631, which passes through the bottom of the conveying slide 3. The end of the contact rod 631 is a downward bevel structure. The conveying slide 3 is provided with a hanging block 34 for sliding the contact rod 631. The outer wall of the conveying slide 3 below the strip groove 33 is provided with a limit The limit switch 35 and the connection between the limit switch 35 and the push piece 63 and the connecting rod 631 are horizontally opposite to each other. When the transfer push frame 6 moves to the side of the welding turntable 2, the push piece 63 cooperates with the transfer push frame 6 to form a vertical contact surface that is not easy to be pushed down with the transferred cylindrical workpiece 5. The bottom inner end of the pressure plate 8 is a slope structure. The pressure plate 8 synchronously enters above the cylindrical workpiece 5. When the connection between the push piece 63 and the connecting rod 631 is squeezed with the limit switch 35, that is, when the cylindrical workpiece 5 enters the welding station 21, the cylinder 4 is reset.

[0027] Among them, the middle part of the pressing plate 8 is vertically rotated and screwed to the lifting screw 81, and the lower end of the lifting screw 81 is vertically rotated and connected to the upper end of the transfer push frame 6. The transfer push frames 6 on the left and right sides of the lifting screw 81 are also vertically fixed with guide rods 82. The upper ends of the guide rods 82 are vertically slidably connected to the pressing plate 8. The height of the pressing plate 8 is adjusted to adapt to cylindrical workpieces 5 of different heights.

[0028] Embodiment 2, on the basis of embodiment 1, the stopper 9 at the bottom of the conveying slide 3 is vertically provided with stop wings 91 on the left and right sides respectively, the stopper 9 is provided with a rectangular control hole 92 consistent with the moving direction of the connecting contact rod 631, and the left and right ends of the bottom of the stopper 9 are vertically provided with pull plates 93 respectively, and the pull plate 93 is provided with a tension spring 94, the other end of the tension spring 94 is fixedly connected to the bottom of the conveying slide 3, and the tension spring 94 provides the stopper 9 with an upward pulling force at all times, and the protruding part of the stopper 9 is used to stop the cylindrical workpiece 5 that enters the pushable range of the transfer push frame 6 from moving outward.

[0029] In the process of the connecting rod 631 following the movement of the transfer push frame 6, the connecting rod 631 first passes through the control hole 92, pressing the stopper 9 to move downward, and the upper end of the stopper 9 is immersed in the bottom plate of the conveying slide 3, so that the cylindrical workpiece 5 can be pushed out. The connecting rod 631 continues to move and passes through the channel between the positioning clamps 23 at the bottom of the welding turntable 2. The welding station 21 on the welding turntable 2 is further aligned with the docking port 32. After welding, the motor 22 drives the welding turntable 2 to rotate ninety degrees each time as a working unit.

[0030] The following further explains and illustrates the functions and effects of each structure in the above content, so that those skilled in the art can better understand the technical solution: The welding chassis 1 serves as the core bearing platform, fixed to the welding frame and supporting all moving parts. The welding turntable 2 rotatably installed above it is driven to rotate by the bottom motor 22. The four "J"-shaped welding stations 21 distributed in a ring on the turntable are opened towards the edge, providing stable support for the cylindrical workpiece 5. The conveying slide 3 on one side of the turntable is arranged along the tangential direction, and the position of the workpiece queue is limited by the end baffle 31. The end docking port 32 corresponds to the welding station 21. After the cylindrical workpiece 5 is arranged in an orderly manner in the slide, the cylinder 4 pushes the transfer pusher 6 to perform precise transfer: the inner plate 61 and the outer plate 64 of the pusher form a accommodating cavity, and the guide bar 641 of the outer plate 64 slides along the slot 311 of the end baffle 31 to ensure the trajectory accuracy. The bevel structure of the inner plate 61 guides the workpiece to slide into the docking port 32. The synchronously acting "L"-shaped push piece 63 passes through the groove 33 to push the bottom of the workpiece, and its contact rod 631 passes through the bottom of the slide and triggers the key control function. During the movement, the contact rod 631 first passes through the control hole 92 of the stop member 9, pressing the stop member 9 with the retaining wing 91 to overcome the tension of the tension spring 94 and dive, thereby removing the obstruction to the subsequent workpiece; when continuing to move, the push piece 63 passes through the "儿"-shaped positioning clamp 23 at the bottom of the welding turntable 2 (the flared end faces the docking port 32), ensuring that the workpiece is accurately embedded in the "几"-shaped groove of the welding station 21. At this time, the positioning clamp 23 automatically clamps the workpiece to prevent deviation.

[0031] During the transfer process, the pressure plate 8 descends synchronously, and its bottom inclined structure presses down on the top of the workpiece to prevent it from tipping over. The height is adjusted by the lifting screw 81 and the guide rod 82 to accommodate workpieces of different diameters. When the connection between the pusher 63 and the contact rod 631 touches the limit switch 35 (at this time, the workpiece has completely entered the workstation), the cylinder 4 automatically resets. The chamfered groove edge of the groove 33 reduces the friction of the pusher 63, while the hanging block 34 ensures the smooth sliding of the contact rod 631. After welding is completed, the motor 22 drives the welding turntable 2 to rotate precisely 90°, so that the next empty workstation is aligned with the docking port 32. At the same time, the welded workpiece is moved to the operating area, realizing continuous cycle operation. The control box 7 centrally manages the signals of the motor 22, the cylinder 4 and the limit switch 35, and coordinates the actions of each component.

[0032] The device realizes physical isolation of only allowing single workpiece to enter the pushing area through the mechanical linkage of the stopper 9 and the transfer pusher 6 (the lower pressing of the connecting rod 631 forces the stopper 9 to sink into the bottom plate); the geometric cooperation of the positioning clamping plate 23 and the welding station 21 forms three-point positioning, eliminating the risk of rolling of the cylindrical workpiece; the double-plate structure of the transfer pusher 6 combined with the vertical constraint of the pressing plate 8 forms full-enclosing anti-overturning protection during the pushing process. Finally, the full-automatic process of separating the cylindrical workpiece 5 from the queue and accurately positioning to the rotary welding is realized, greatly improving the welding efficiency and position consistency.

[0033] Working principle: When the device is working, the cylindrical workpiece 5 to be welded is first arranged in order in the conveying chute 3, and the workpiece at the front end of the queue is abutted against the end baffle 31 at the end of the conveying chute 3 under the action of gravity or pushing. At this time, the stopper 9 in the middle inside of the butt joint 32 in the bottom plate of the conveying chute 3 is kept in a protruding state under the action of the pulling force of the tension spring 94, and the left and right blocking fins 91 block the forward movement of the subsequent workpiece, ensuring that only the workpiece at the front end is in a position that can be pushed.

[0034] After starting the welding process, the control box 7 sends instructions to make the cylinder 4 act, driving the piston rod to push the transfer pusher 6 to move towards the welding turntable 2. When the transfer pusher 6 moves, the guide strip 641 on the outer plate 64 slides along the clamping groove 311 of the inner wall of the end baffle 31, ensuring the accuracy of the movement trajectory. At the same time, the "L"-shaped pushing piece 63 fixed at the lower end of the transfer pusher 6 begins to enter the strip groove 33 of the side wall of the conveying chute 3. The connecting rod 631 at the bottom of the pushing piece 63 immediately penetrates the control hole 92 on the stopper 9, and under the action of the bevel surface, the stopper 9 is pressed to move downward against the pulling force of the tension spring 94, until the upper end of the stopper 9 completely sinks into the bottom plate of the conveying chute 3, at which time the blocking fins 91 remove the blocking of the subsequent workpiece.

[0035] As the transfer pusher 6 continues to advance, the inner plate 61 (the end is a bevel structure) and the outer plate 64 together form a containing cavity that pushes the cylindrical workpiece 5 at the front end, making the workpiece smoothly slide out of the butt joint 32. Simultaneously, the vertical part of the pushing piece 63 provides support thrust from the bottom of the workpiece, and the pressing plate 8 (the bottom is a bevel structure) at the upper end of the transfer pusher 6 synchronously descends to press the top of the workpiece, forming a three-dimensional constraint to prevent the workpiece from falling. In this process, the connecting rod 631 is guided by the hanging block 34 to keep smooth sliding, and the chamfer structure at the edge of the strip groove 33 reduces the friction resistance.

[0036] When the workpiece is pushed to the welding station 21 of the welding turntable 2, the opening of the "J"-shaped welding station 21 receives the bottom of the workpiece. Simultaneously, the pusher 63 continues forward and passes through the channel between the "R"-shaped positioning clamps 23 on the bottom of the welding turntable 2 (with its flared end facing the docking port 32 for easy insertion). The geometric coordination between the positioning clamps 23 and the welding station 21 automatically creates a three-point clamp for the workpiece, effectively preventing rolling or shifting during welding. When the workpiece is fully positioned, the connection between the pusher 63 and the contact rod 631 contacts the limit switch 35 mounted on the outer wall of the conveyor slide 3, triggering a signal that automatically resets the cylinder 4 and retracts the transfer pusher 6.

[0037] During the retraction process, the contact rod 631 disengages the control hole 92 of the stopper 9. The stopper 9, activated by the tension spring 94, repositions upward, preventing the next workpiece from advancing and preparing for the next push. After welding is complete, the control box 7 controls the motor 22 to rotate the welding turntable 2 precisely 90°, allowing the welded workpiece to move out of the operating area. Simultaneously, the next unloaded welding station 21 rotates to align with the docking port 32. The height of the pressure plate 8 can be adjusted to accommodate workpieces of varying diameters by rotating the lifting screw 81 (adjustable along the guide rod 82). This cycle enables continuous automatic loading, precise positioning, welding, and indexing of the cylindrical workpiece 5, significantly improving processing efficiency and position consistency.

[0038] In this article, there are several points to note: 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures can refer to the general design.

[0039] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0040] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A cylindrical workpiece positioning device for welding processing, comprising: Welding chassis; the welding chassis is fixedly mounted on the welding machine frame, a disc-shaped welding turntable is rotatably mounted on the welding chassis, a motor is fixedly mounted on the bottom of the welding chassis below the welding turntable, the motor drives the welding turntable to rotate, and four welding stations are distributed in a ring near the edge of the ring; it is characterized in that a conveying slide is provided on the welding chassis on one side of the welding turntable along the tangent direction of the welding turntable, a docking port for a single cylindrical workpiece to pass through is provided at the position where the conveying slide and the welding turntable are connected, and a A groove is vertically opened on one side, and the groove is opposite to the middle of the docking interface; a transfer push rack is provided above the groove, and a pressure plate is provided on the upper end of the transfer push rack. A cylinder is also provided on the welding base frame, and the piston rod of the cylinder is fixedly connected to the transfer push rack, which is used to push the transfer push rack to push the single cylindrical workpiece in the conveying slide from the docking interface to the welding station on the welding turntable. The cylindrical workpieces are arranged in order in the conveying slide from the end away from the docking interface; a control box is fixedly mounted on one side of the welding base frame; a stopper is vertically provided in the bottom plate of the conveying slide on the inner side of the middle part of the docking interface.

2. A cylindrical workpiece positioning device for welding according to claim 1, characterized in that: The welding station is a "J"-shaped structure, and the open end of the welding station faces the edge of the welding turntable.

3. The cylindrical workpiece positioning device for welding according to claim 1, characterized in that: A "child"-shaped positioning splint is correspondingly provided on the bottom surface of the welding turntable below the welding station, and the flared end of the positioning splint faces the docking port of the conveying slide.

4. A cylindrical workpiece positioning device for welding according to claim 1, characterized in that: An end baffle is fixed vertically upward at the end of the conveying slide at one end where the docking port is located. The end baffle is higher than the inner side wall of the conveying slide and has two slots horizontally provided on the side facing the docking port. When one end of a single cylindrical workpiece rests against the end baffle, the transfer pusher moves toward the docking port to push the cylindrical workpiece out of the docking port.

5. The cylindrical workpiece positioning device for welding according to claim 1, characterized in that: The left and right ends of the transfer push frame are respectively vertically provided with an inner plate and an outer plate, the inner plate is away from the end baffle, the inner plate is distributed on the inner and outer sides of the transfer push frame, the outer plate is tangent to the inner wall of the end baffle in a sliding manner, the outer plate is distributed on the inner side of the transfer push frame, and a guide bar is provided on the outer wall of the outer plate to slide and engage with the card groove, the end of the inner plate close to the docking interface is a bevel structure, and a cylindrical workpiece is accommodated between the inner plate and the outer plate.

6. A cylindrical workpiece positioning device for welding according to claim 4, characterized in that: The lower end of the transfer push frame is fixed vertically downward with an "L"-shaped push piece, which is vertically opposite to the strip groove, and the two groove edges at the outer ends of the strip groove are chamfered structures. The lower end of the push piece is fixed with a horizontal connecting rod, which passes through the bottom of the conveying slide, and the end of the connecting rod is a downward oblique section structure. The conveying slide is provided with a hanging block for sliding the connecting rod. A limit switch is provided on the outer wall of the conveying slide below the strip groove. The limit switch is horizontally opposite to the connection between the push piece and the connecting rod. When the transfer push frame moves toward one side of the welding turntable, the push piece cooperates with the transfer push frame to form a vertical contact surface with the transferred cylindrical workpiece that is not easy to be pushed over. The bottom inner end of the pressure plate is a sloped structure, and the pressure plate synchronously enters above the cylindrical workpiece. When the connection between the push piece and the connecting rod is squeezed by the limit switch, that is, when the cylindrical workpiece enters the welding station, the cylinder resets.

7. The cylindrical workpiece positioning device for welding according to claim 1, characterized in that: The middle part of the pressing plate is vertically rotated and screwed to the lifting screw, and the lower end of the lifting screw is vertically rotated and connected to the upper end of the transfer push frame. Guide rods are also vertically fixed on the transfer push frames on the left and right sides of the lifting screw. The upper ends of the guide rods are vertically slidingly connected to the pressing plate. The height of the pressing plate can be adjusted to adapt to cylindrical workpieces of different heights.

8. The cylindrical workpiece positioning device for welding according to claim 6, characterized in that: The stopper at the bottom of the conveying slide is respectively provided with stop wings vertically on the left and right sides, and a rectangular control hole is opened on the stopper which is consistent with the moving direction of the connecting contact rod. Pull plates are respectively provided vertically on the left and right ends of the bottom of the stopper, and a tension spring is provided on the pull plate. The other end of the tension spring is fixedly connected to the bottom of the conveying slide. The tension spring provides an upward pulling force for the stopper, and the protruding part of the stopper is used to stop the cylindrical workpiece that enters the pushable range of the transfer push rack from moving outward.

9. A cylindrical workpiece positioning device for welding according to claim 8, characterized in that: During the movement of the connecting rod following the transfer push frame, the connecting rod first passes through the control hole, presses the stopper to move downward, and the upper end of the stopper is immersed in the bottom plate of the conveying slide, so that the cylindrical workpiece can be pushed out. The connecting rod continues to move and passes through the channel between the positioning clamps at the bottom of the welding turntable. The welding station on the welding turntable is further aligned with the docking interface. After welding, the motor drives the welding turntable to rotate ninety degrees each time as a working unit.

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