Feeding assembly, feeding and discharging system and method for continuous welding of metal rings

Abstract

The invention discloses a feeding assembly for continuous welding of a metal ring. The feeding assembly comprises a feeding mechanism, a guide mechanism and a feeding mechanism. The feeding mechanism is installed below the guide mechanism, a vertical limiting plate matched with a seam of a workpiece is arranged between the feeding mechanism and the guide mechanism, and the limiting plate is in sliding connection with the guide mechanism. A workpiece is arranged on the feeding mechanism in a sleeving mode, a seam of the workpiece faces upwards, and the lower end of the limiting plate is clamped into the seam of the workpiece. The fixed end of the feeding mechanism is connected with the guide mechanism, and the driving ends of the feeding mechanism are arranged on the two sides of the feeding mechanism, make contact with workpieces on the feeding mechanism and drive the workpieces to move in the axial direction of the feeding mechanism. The invention further discloses a feeding and discharging system and method. The automatic welding machine has the beneficial effects that automatic feeding of workpieces and positioning of weld seam openings can be conducted, automatic feeding and discharging are achieved, the automation degree is high, and the feeding efficiency and the welding quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a loading and unloading system and method for continuous welding of metal rings. Background Art

[0002] As a common mechanical part, welded metal rings are widely used in many fields such as pipeline and container manufacturing, automobile manufacturing, aerospace industry, electronic equipment manufacturing, construction and infrastructure, and energy industry, playing an important role in these industrial fields. With the improvement of the degree of automation in the manufacturing industry, the automatic loading and unloading of metal rings in the welding process has become more and more critical.

[0003] In the prior art, the loading and unloading operation of welding metal rings is usually manual, which is not only time-consuming and labor-intensive and inefficient, but also has the risk of human error, which will also affect the consistency of welding quality, and the manual loading and unloading process is also prone to material loss and waste, especially in large-scale production, which will increase production costs. At present, there are also related studies and designs for feeding devices for circular ring parts. For example, the invention patent with the authorization announcement number CN108502462A discloses a feeding device for circular ring parts, which drives the push block through a cylinder to push the circular ring parts to a specified position, and an arc-shaped notch is provided on the push block to make its positioning more accurate, replace manual feeding, and improve production efficiency. However, this feeding device is only suitable for feeding circular ring parts without special positioning requirements, and the positioning operation cannot be realized. For metal rings that need to be processed and welded, the weld seam is mostly designed, and the existing device cannot realize the positioning of the metal ring seam. At the same time, the posture of the metal ring at the specified position is not convenient for welding, which affects the welding quality. Summary of the invention

[0004] The purpose of the present invention is to provide a loading assembly, loading and unloading system and method for continuous welding of metal rings in view of the deficiencies in the prior art, so as to improve the welding quality.

[0005] The technical solution adopted by the present invention is: a feeding assembly for continuous welding of metal rings, comprising a feeding mechanism, a guiding mechanism and a feeding mechanism;

[0006] The feeding mechanism is installed below the guide mechanism, and a vertical limit plate adapted to the seam of the workpiece is arranged between the two, and the limit plate is slidably connected to the guide mechanism;

[0007] The workpiece is sleeved on the feeding mechanism, the seam of the workpiece faces upward, and the lower end of the limit plate is inserted into the seam of the workpiece;

[0008] The fixed end of the feeding mechanism is connected to the guide mechanism, and the driving end of the feeding mechanism is arranged on both sides of the feeding mechanism, contacts with the workpiece on the feeding mechanism, and drives the workpiece to move axially along the feeding mechanism.

[0009] According to the above scheme, the feeding mechanism includes a feeding shaft and a sleeve; the sleeve is coaxially arranged with the feeding shaft, and the sleeve is arranged at the discharge end of the feeding shaft; slots are opened on both sides of the sleeve; the driving end of the feeding mechanism passes through the slot and contacts the workpiece in the sleeve.

[0010] According to the above scheme, the feeding mechanism includes a gear transmission box, a feeding motor, a transmission rod, a turntable and a feeding piece; the gear transmission box is arranged on the guide mechanism above the feeding mechanism, the feeding motor is installed on the gear transmission box, the input end of the feeding motor is connected to the output end of the gear transmission box, the output end of the gear transmission box is connected to the upper end of the transmission rod, and a rotating block is installed at the lower end of the transmission rod, the rotating block is connected to the push plate, and the push plate passes through the slot of the sleeve.

[0011] According to the above solution, the guide mechanism includes a guide rail, a sliding groove is provided at the bottom of the guide rail, the sliding groove is adapted to the sliding block, and the sliding block is connected to the top of the limiting plate.

[0012] The present invention also adopts a loading and unloading system for continuous welding of metal rings, characterized in that it comprises a loading assembly and a unloading assembly as described above;

[0013] The material unloading assembly comprises a workbench, a turntable and a rotating mechanism arranged on the workbench, a clamping mechanism and a material unloading mechanism;

[0014] The turntable has a plurality of workstations evenly spaced around it, each workstation has a corresponding workstation hole, a guide shaft is provided in the workstation hole, and a group of clamping mechanisms and unloading mechanisms are arranged on the outer circumference of the guide shaft; the rotating mechanism is installed on the workbench, and the driving end of the rotating mechanism is connected to the turntable to drive the turntable to rotate.

[0015] According to the above scheme, the unloading assembly also includes a positioning mechanism, the fixed end of the positioning mechanism is installed on the workbench, and the working end of the positioning mechanism passes through the guide shaft and turntable facing the loading mechanism and is inserted into the workpiece gap located at the discharge end of the loading mechanism.

[0016] According to the above scheme, the positioning mechanism includes a positioning cylinder, a positioning rod and a connecting rod; the positioning cylinder is fixed on the workbench, and the piston rod of the positioning cylinder is hinged to one end of the connecting rod; the positioning rod is L-shaped, the lower end of the vertical section of the positioning rod is hinged to the positioning cylinder, the middle part of the vertical section of the positioning rod is hinged to the other end of the connecting rod, the upper end of the vertical section of the positioning rod is connected to the inner end of the horizontal section of the positioning rod, and the outer end of the horizontal section of the positioning rod is the working end.

[0017] According to the above scheme, the unloading mechanism includes a spring and a retaining ring which are sequentially sleeved on the outside of the guide shaft, the inner end of the spring is connected to the work station hole, and the outer end of the spring is connected to the retaining ring.

[0018] According to the above scheme, the clamping mechanism includes a plurality of clamping plates and a clamping cylinder distributed along the circumference of the guide shaft, and the clamping plates are connected to the piston rod of the clamping cylinder.

[0019] The present invention also adopts a metal ring loading and unloading method based on the loading and unloading system as described above, the method comprising:

[0020] Loading: The workpiece is placed on the loading shaft with the seam facing upwards, and moves to the initial loading position along with the loading mechanism; the loading mechanism and the retaining ring at the loading station are pressed to the limit position; the positioning mechanism is started, and the working end of the positioning rod is inserted into the seam of the workpiece at the discharge end of the loading mechanism; the feeding mechanism is started, so that the workpiece at the discharge end of the loading shaft moves to the guide shaft of the loading station;

[0021] Clamping:

[0022] The clamping piece at the bottom of the outer periphery of the guide shaft clamps the workpiece, the positioning rod is reset, and the clamping pieces on both sides of the guide shaft clamp the workpiece;

[0023] Cutting:

[0024] The loading mechanism is reset, the rotating mechanism works, the turntable rotates, the guide shaft on the loading station clamps the workpiece and rotates to the next station, the next guide shaft rotates to the loading station to load the workpiece, and the workpiece is loaded and clamped on the guide shaft; when the guide shaft that clamps the workpiece rotates and reaches the welding station opposite the loading station, the laser welding machine welds the workpiece; after welding is completed, the clamping piece installed on the circumference of the guide shaft releases the workpiece, the spring and the retaining ring are reset, and the welded workpiece is pushed away from the welding station to complete the unloading of the workpiece.

[0025] The beneficial effects of the present invention are:

[0026] 1. The feeding assembly of the present invention is designed with a feeding assembly, a feeding mechanism and a limit plate, which can automatically feed the workpiece and position the weld seam, thereby realizing automatic feeding. Compared with the prior art, it has a high degree of automation and improves the feeding efficiency. At the same time, it can avoid the instability caused by human factors, ensure the positioning of the workpiece seam, and improve the welding quality.

[0027] 2. The loading and unloading system of the present invention can realize rapid guiding and positioning of the workpiece during the loading and clamping process through the loading assembly and the unloading assembly. The workpiece can be loaded and unloaded continuously and automatically, reducing the need for manual operation and thus reducing labor costs. At the same time, for large-scale production, it can effectively alleviate the problem of labor shortage and reduce the operating costs of the enterprise.

[0028] 3. The present invention designs a feeding mechanism which can realize automatic feeding of workpieces through springs and retaining rings. Compared with the method of using tools to feed workpieces in the prior art, it can reduce material loss and waste of workpieces, thereby improving the utilization rate of raw materials.

[0029] 4. The present invention opens a through hole on the upper surface of the turntable, and the positioning rod can reach the working position from the initial position through the through hole. In the process of the movement of the positioning rod, the through hole also plays a role of positioning and guiding it, thereby making the guiding and positioning of the workpiece in the process of loading more accurate; the initial position of the positioning rod is set to a position where its highest point is lower than the position of the inner wall of the upper surface of the turntable, so that when it is in the initial position, it does not interfere with the rotation of the turntable.

[0030] 5. The present invention provides a slot on the guide shaft, and the aperture of the slot is larger than the weld of the workpiece, so that the laser welding machine can directly weld the workpiece at the welding station; in the turntable, the loading station and the welding station are opposite to each other, and the loading process and the welding process do not interfere with each other, which can realize the continuous production of the workpiece, reduce the waiting time in the production process, and improve the overall production efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the workpiece in the embodiment.

[0032] Figure 2 Schematic diagram of the feeding assembly in this embodiment Figure 1 .

[0033] Figure 3 Schematic diagram of the feeding assembly in this embodiment Figure 2 .

[0034] Figure 4 This is a partial enlarged view of the feeding assembly in this embodiment (i.e. Figure 5 Schematic diagram of point A).

[0035] Figure 5 A schematic diagram of the structure of the loading and unloading system in this embodiment.

[0036] Figure 6 It is a schematic diagram of the structure inside the workstation hole in this embodiment.

[0037] Figure 7 Schematic diagram of the structure of the turntable in this embodiment (the turntable is inverted).

[0038] Figure 8 Schematic diagram of the structural arrangement on the workbench in this embodiment.

[0039] In the figure: 1. feeding assembly; 2. unloading assembly; 3. through hole; 4. gear transmission box; 5. guide rail; 6. sleeve; 7. retaining ring; 8. spring; 9. guide shaft; 10. positioning rod; 11. bolt; 12. workpiece; 12.1. seam; 13. turntable; 14. clamping plate; 15. feeding shaft; 16. rotating block; 17. push plate; 18. feeding motor; 19. gear; 20. transmission rod; 21. positioning cylinder; 22. fixture; 23. workbench; 24. main motor; 25. piston rod; 26. connecting rod; 27. base; 28. limit plate; 29. ​​slot hole. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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 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.

[0041] like Figures 2 to 4 A feeding assembly for continuous welding of metal rings is shown, specifically a feeding assembly for continuous welding of metal rings with seams, comprising a feeding mechanism, a guiding mechanism and a feeding mechanism;

[0042] The feeding mechanism is installed below the guide mechanism, and a limit plate 28 adapted to the seam opening 12.1 of the workpiece 12 is arranged between the two, and the limit plate 28 is slidably connected to the guide mechanism;

[0043] The workpiece 12 is sleeved on the feeding mechanism, with the seam 12.1 of the workpiece 12 facing upward, and the limiting plate 28 is inserted into the seam 12.1 of the workpiece 12;

[0044] The fixed end of the feeding mechanism is connected to the guide mechanism, and the driving end of the feeding mechanism is arranged on both sides of the feeding mechanism, contacts the workpiece 12 on the feeding mechanism, and drives the workpiece 12 to move axially along the feeding mechanism.

[0045] In the present invention, Figure 1 As shown, the workpiece 12 is a metal ring, which is provided with a welding seam 12.1. The seam 12.1 is adapted to a limit plate 28. The limit plate 28 is fixedly connected to the top of the feeding mechanism. The limit plate 28 drives the feeding mechanism to move along the length direction of the guide mechanism. The feeding mechanism can drive the workpiece 12 to move axially along the feeding mechanism.

[0046] Preferably, if Figure 2As shown, the feeding mechanism includes a feeding shaft 15 and a sleeve 6; the sleeve 6 is coaxially arranged with the feeding shaft 15, and the sleeve 6 is arranged at the discharge end of the feeding shaft 15, and the workpiece 12 can be moved to the space between the feeding shaft 15 and the sleeve 6; slots are provided on both sides of the sleeve 6; the driving end of the feeding mechanism passes through the slot and contacts with the workpiece 12 in the sleeve 6 (can be fitted and pressed).

[0047] In the present invention, the cross-section of the loading shaft 12 is adapted to the structure of the workpiece 12; after the driving end of the feeding mechanism contacts the current workpiece 12, it drives the current workpiece 12 to move axially along the loading shaft 15 to a set displacement, and then the driving end of the feeding mechanism disengages from the current workpiece 12, contacts the next workpiece 12 and drives the next workpiece 12 to move axially, so that the workpieces 12 on the loading mechanism move one by one to the discharge end of the loading mechanism, thereby realizing the feeding of the workpiece 12.

[0048] Preferably, the feeding mechanism includes a gear transmission box 4, a feeding motor 18, a transmission rod 20, a turntable 13 and a feeding piece; the gear transmission box 4 is arranged on a guide mechanism above the feeding mechanism, the feeding motor 18 is installed on the gear transmission box 4, the input end of the feeding motor 18 is connected to the output end of the gear transmission box 4, the output end of the gear transmission box 4 is connected to the upper end of the transmission rod 20, and the lower end of the transmission rod 20 is installed with a rotating block 16, the rotating block 16 is connected to the push plate 17 through a connecting plate, and the push plate 17 can pass through the slot of the sleeve 6 and contact the workpiece 12.

[0049] In the present invention, the gear transmission box 4 is slidably connected to the guide mechanism, and the feeding mechanism and the loading mechanism can slide synchronously along the length direction of the guide mechanism.

[0050] In this embodiment, Figure 3 and Figure 4 As shown, the gear transmission box 4 is connected to four vertical transmission rods 20, and the four transmission rods 20 are arranged in groups of two on both sides of the feeding mechanism; the feeding motor 18 drives the transmission rods 20 to rotate through the gear transmission box 4, and the rotating block 16 located at the lower end of the transmission rod 20 rotates accordingly and drives the push plate 17 to reciprocate along the axial direction of the feeding shaft 15. When the push plate 17 fits with the current workpiece 12, it drives the current workpiece 12 to move axially forward to a set displacement, and then disengages from the current workpiece 12, moves backward until it contacts the next workpiece 12 and drives the next workpiece 12 to move axially forward, thereby feeding the workpieces 12 on the feeding shaft 15 to the discharge end of the feeding shaft 15 piece by piece; the single feeding displacement of the feeding mechanism is consistent with the width of the workpiece 12. The structure and function of the gear transmission box 4 are existing mature technologies, and the internal gears are meshed to achieve transmission. The specific gear arrangement is as follows Figure 3 As shown, no further description is given here.

[0051] Preferably, the guide mechanism comprises a guide rail 5 , a sliding groove is provided at the bottom of the guide rail 5 , the sliding groove is adapted to fit a sliding block, and the sliding block is connected to the top of the limiting plate 28 .

[0052] In this embodiment, the gear transmission box 4 is slidably installed on the upper part of the guide rail 5, and the feeding mechanism is installed on the bottom of the guide rail 5 through a sliding block and a limit plate 28. The sliding block drives the limit plate 28, the feeding shaft 15 and the sleeve 6 to slide along the length direction of the guide rail 5; after the workpiece 12 is loaded from the feeding end of the feeding shaft 15, the limit plate 28 is clamped in the seam 12.1 of the workpiece 12, so that the seam 12.1 of the workpiece 12 is always facing upward during the feeding process, thereby realizing the positioning of the seam 12.1 of the workpiece 12.

[0053] like Figure 5 A loading and unloading system for continuous welding of metal rings is shown, comprising a loading assembly 1 and a unloading assembly 2 as described above;

[0054] The blanking assembly 2 includes a workbench 23, a turntable 13 and a rotating mechanism arranged on the workbench 23, a clamping mechanism and a blanking mechanism;

[0055] The workbench 23 is mounted on a base 27; Figure 7 As shown, the turntable 13 is provided with a plurality of stations at even intervals in the circumferential direction, and each station has a corresponding station hole, such as Figure 6 As shown, a guide shaft 9 is provided in the station hole, and a group of clamping mechanisms and unloading mechanisms are arranged on the periphery of the guide shaft 9; the rotating mechanism is installed on the workbench 23, and the driving end of the rotating mechanism is connected to the turntable 13, driving the turntable 13 to rotate so that one of the stations of the turntable 13 is opposite to the discharge end of the loading mechanism.

[0056] In the present invention, the rotating mechanism drives the turntable 13 to rotate, so that one of the stations of the turntable 13 is opposite to the discharge end of the feeding mechanism (specifically, opposite to the end of the feeding shaft 15 of the feeding mechanism). At this time, the station is the loading station, and the station opposite to the station is the welding station (as the turntable 13 rotates, the guide shafts 9 on the loading station and the welding station are always in dynamic change).

[0057] Preferably, the unloading assembly 2 further comprises a positioning mechanism, the fixed end of which is mounted on a workbench 23, and the working end of which passes through the guide shaft 9 and the turntable 13 facing the loading mechanism, and is inserted into the seam 12.1 of the workpiece 12 at the discharge end of the loading mechanism. The positioning mechanism comprises a positioning cylinder 21, a positioning rod 10 and a connecting rod 26; the positioning cylinder 21 is fixed on the workbench 23, and the piston rod 25 of the positioning cylinder 21 is hinged to one end of the connecting rod 26; the positioning rod 10 is L-shaped (including a vertical section and a horizontal section), the lower end of the vertical section of the positioning rod 10 is hinged to the positioning cylinder 21 (specifically, it is hinged to the boss outside the positioning cylinder 21), the middle part of the vertical section of the positioning rod 10 is hinged to the other end of the connecting rod 26, the upper end of the vertical section of the positioning rod 10 is connected to the inner end of the horizontal section of the positioning rod 10, and the outer end of the horizontal section of the positioning rod 10 is the working end. When the piston rod 25 of the positioning cylinder 21 retracts downward, driven by the connecting rod 26, the horizontal section of the positioning rod 10 passes through the slot 29 of the guide shaft 9 and the through hole 3 of the turntable 13 and moves to the working position (moves into the slit 12.1 of the workpiece 12).

[0058] Preferably, the unloading mechanism includes a spring 8 and a retaining ring 7 (the spring 8 is a butterfly spring) which are sequentially sleeved on the outside of the guide shaft 9, the inner end of the spring 8 is connected to the work station hole, and the outer end of the spring 8 is connected to the retaining ring 7; after the workpiece 12 is welded at the welding station, the clamping mechanism releases the workpiece 12, and the workpiece 12 is ejected under the resetting action of the spring 8, thereby realizing automatic unloading of the workpiece 12 after welding is completed.

[0059] Preferably, the clamping mechanism includes a plurality of clamping plates 14 and a clamping cylinder distributed circumferentially along the guide shaft 9, the clamping plates 14 are connected to the piston rod of the clamping cylinder, and the clamping cylinder is installed in the work station hole; the clamping plates 14 clamp the workpiece by extending and retracting the piston rod of the clamping cylinder.

[0060] In the present invention, each clamping mechanism includes three clamping pieces 14, which are respectively arranged at the bottom and left and right sides of the guide shaft 9.

[0061] In the present invention, each guide shaft 9 is provided with a vertical slot 29, the width of which is greater than the width of the seam 12.1 of the workpiece 12, so as to facilitate welding; the width of the slot 29 is 5 to 10 mm; a through hole 3 corresponding to the position of the slot 29 is provided on the turntable 13; the slot 29 and the through hole 3 are used for the positioning rod 10 of the positioning mechanism to pass through; after the working end of the positioning mechanism (that is, the positioning rod 10) passes through the through hole 3 and the slot 29, it is inserted into the feeding mechanism (specifically the feeding shaft 15 ), the workpiece 12 is discharged from the discharge end of the feeding mechanism under the action of the feeding mechanism and then sleeved on the guide shaft 9 (the slit 12.1 is always facing upward due to the action of the positioning mechanism), and the end of the workpiece 12 contacts the retaining ring 7 and compresses the spring 8; the clamping piece 14 clamps the workpiece 12 to achieve the clamping and positioning of the workpiece 12; the positioning mechanism is reset, the turntable 13 rotates to make the workpiece 12 reach the welding station, and then the workpiece 12 is welded by the laser welding machine.

[0062] In the present invention, the loading assembly 1 and the unloading assembly 2 can realize rapid guidance and positioning of the workpiece 12 during the loading and clamping process, which can effectively avoid instability caused by human factors and ensure the welding quality of the workpiece 12.

[0063] Example

[0064] like Figure 5 A loading and unloading system for continuous welding of metal rings shown in the figure comprises a loading assembly 1 and a unloading assembly 2, wherein:

[0065] The feeding assembly 1 includes a guide rail 5, a feeding shaft 15, a sleeve 6, a workpiece 12, a gear transmission box 4, a feeding motor 18, a rotating block 16 and a push plate 17; the feeding shaft 15 is slidably installed under the guide rail 5 through a limit plate 28 and a sliding block, and the sleeve 6 is fixedly connected to one end (discharging end) of the feeding shaft 15; the workpiece 12 is sleeved on the surface of the feeding shaft 15; the gear transmission box 4 is installed on the guide rail 5 above the discharging end of the feeding shaft 15, and the feeding motor 18 is fixedly installed on the upper surface of the gear transmission box 4; the gear transmission There are two driving gears 19 in the box 4, which are meshed with each other, and the left driving gear 19 is fixedly connected to one end of the output shaft of the feeding motor 18; each driving gear 19 is respectively meshed with two driven gears, and the gear shafts of the driven gears are connected to the transmission rods 20. There are four transmission rods 20, which are symmetrically distributed on both sides of the gear transmission box 4; there are four rotating blocks 16, which are respectively arranged at the lower ends of the transmission rods 20; there are two push plates 17, which are arranged on both sides of the feeding mechanism, and each push plate 17 is connected to the two rotating blocks 16 on the same side through a connecting plate.

[0066] The unloading assembly 2 includes a workbench 23, a turntable 13, a guide shaft 9, a spring 8, a retaining ring 7 and a clamping mechanism; the turntable 13 is an eight-station turntable 13, and eight stations are evenly spaced circumferentially. When a station rotates to the discharge end of the feeding mechanism, the station is the feeding station, and the welding station is opposite to the feeding station at this time; eight guide shafts 9, springs 8 and retaining rings 7 are respectively provided; the guide shaft 9 is fixedly installed in the side station hole of the turntable 13 by bolts 11; the inner end face of the spring 8 is aligned with the inner end face of the station hole of the turntable 13, and is fixedly installed coaxially with the guide shaft 9; the inner end face of the retaining ring 7 is fixedly connected to the outer end face of the disc spring 8, and is installed coaxially with the guide shaft 9; the clamping mechanism has eight groups, distributed in the eight station holes; each clamping mechanism includes three clamping plates 14 evenly distributed on the periphery of the guide shaft 9.

[0067] The blanking assembly 2 also includes a fixture 22, a main motor 24 and a positioning mechanism; the fixture 22 is fixedly mounted on the upper surface of the workbench 23, such as Figure 8 As shown, the main motor 24 is fixedly mounted on the upper surface of the workbench 23 through a fixture 22, and the main shaft of the main motor 24 is fixedly connected to the turntable 13 to drive the turntable 13 to rotate. The positioning mechanism includes a positioning cylinder 21, a positioning rod 10 and a connecting rod 26.

[0068] In this embodiment, a through hole 3 is provided on the upper surface of the turntable 13, and the positioning rod 10 can reach the working position from the initial position through the through hole 3 (that is, the end of the positioning rod 10 moves to the slit 12.1 of the workpiece 12 at the discharge end of the loading shaft 15), and in the process of the movement of the positioning rod 10, the through hole 3 also plays a role of positioning and guiding it, thereby making the guiding and positioning of the workpiece 12 in the loading process more accurate; the initial position of the positioning rod 10 is set to a position where its highest point is lower than the position of the inner wall of the upper surface of the turntable 13, so that at the initial position, it has no interference with the rotation of the turntable 13, and can realize continuous and automatic loading and unloading of the workpiece 12, which can reduce the demand for manual operation and thus reduce labor costs. At the same time, for large-scale production, it can effectively alleviate the problem of labor shortage and reduce the operating costs of the enterprise.

[0069] In this embodiment, a slot 29 is provided on the guide shaft 9, and the aperture of the slot 29 is much larger than the weld of the workpiece 12, so that the laser welding machine can directly weld the workpiece 12 when the guide shaft 9 rotates to the welding station; on the turntable 13, the loading station and the welding station are opposite to each other, and the loading process and the welding process do not interfere with each other, so that continuous production of the workpiece 12 can be realized, thereby reducing the waiting time in the production process, thereby improving the overall production efficiency of the workpiece 12.

[0070] A method for loading and unloading a metal ring, the method comprising the following steps:

[0071] Loading: The workpiece 12 is sleeved on the loading shaft 15 with the slit 12.1 positioned upward, and moves synchronously along the guide rail to the initial loading position (the initial position does not affect the rotation of the turntable) with the loading shaft 15 and the sleeve 6 of the loading mechanism; the sleeve 6 of the loading mechanism and the retaining ring 7 at the loading station are pressed to the limit position; the positioning mechanism is started, and the positioning rod 10 moves to the working position (at this time, the working end of the positioning rod 10 is inserted into the slit 12.1 of the workpiece 12 at the discharge end of the loading shaft 15 of the loading mechanism); the feeding mechanism is started, so that the workpiece 12 at the discharge end of the loading shaft 15 moves to the guide shaft 9 of the loading station.

[0072] Clamping:

[0073] After the workpiece 12 moves to the guide shaft 9 on the loading station, the clamping piece 14 installed at the bottom of the outer periphery of the guide shaft 9 clamps the workpiece 12; the positioning mechanism is started, the piston rod of the positioning mechanism moves downward, and the positioning rod 10 is reset; the clamping pieces 14 installed on both sides of the guide shaft 9 move inward at the same time to clamp the workpiece 12.

[0074] Cutting:

[0075] Except for the guide rail 5, the loading mechanism starts to reset (return to the initial position without affecting the rotation of the turntable), the main motor 24 of the rotating mechanism starts to work, the turntable 13 rotates, the guide shaft 9 on the loading station clamps the workpiece 12 and rotates to the next station, and the next guide shaft 9 rotates to the loading station to load the workpiece, and the workpiece 12 is loaded and clamped on the guide shaft 9; when the guide shaft 9 that clamps the workpiece 12 rotates and reaches the welding station opposite the loading station, the laser welding machine welds the workpiece 12; after welding is completed, the clamping plate 14 installed on the circumference of the guide shaft 9 synchronously retracts to release the workpiece 12, the spring 8 and the retaining ring 7 reset, and the workpiece 12 after welding is pushed away from the welding station, completing the unloading of the workpiece 12.

[0076] In the present invention, the specific workpiece loading method is as follows: after the workpiece 12 is sequentially sleeved on the loading shaft 15, it moves along the guide rail 5 toward the direction of the turntable 13 along with the loading shaft 15 and the sleeve 6 until the front end surface of the sleeve 6 contacts the outer end surface of the retaining ring 7 at the loading station, and moves the compression spring 8 together with the retaining ring 7 to the limit position of the retaining ring 7; at the same time, the piston rod of the positioning mechanism moves upward, so that the end of the positioning rod 10 rotates upward and passes through the through hole 3 of the turntable 13 and the slot 29 of the guide shaft 9 to reach the upper part of the guide shaft 9 (this is the working position). , and corresponds to the position of the limit plate 28 at the bottom of the guide rail 5; the feeding motor 18 starts to work, and the rotating block 16 rotates through the gear transmission box 4 and the transmission rod 20, and the push plate 17 starts to perform a reciprocating clamping feeding movement, feeding a distance of the width of a workpiece 12 each time. During the feeding movement, the positioning rod 10 is always aligned with the weld of the workpiece 12; the workpiece 12 at the outermost end of the discharge end of the feeding shaft 15 moves under the action of the feeding mechanism and is sleeved on the guide shaft 9, and the end of the workpiece 12 after feeding contacts the outer end surface of the retaining ring 7. During the feeding process, the workpiece 12 is continuously replenished at the feeding end of the feeding shaft 15.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding assembly for continuous welding of metal rings, characterized in that: It includes a loading mechanism, a guiding mechanism and a feeding mechanism; The feeding mechanism is installed below the guide mechanism, and a limit plate adapted to the seam of the workpiece is arranged between the two, and the limit plate is slidably connected to the guide mechanism; The workpiece is sleeved on the feeding mechanism, the seam of the workpiece faces upward, and the limit plate is inserted into the seam of the workpiece; The fixed end of the feeding mechanism is connected to the guide mechanism, and the driving end of the feeding mechanism is arranged on both sides of the feeding mechanism, contacts with the workpiece on the feeding mechanism, and drives the workpiece to move axially along the feeding mechanism.

2. The feeding assembly for continuous welding of metal rings according to claim 1, characterized in that: The feeding mechanism comprises a feeding shaft and a sleeve; the sleeve is coaxially arranged with the feeding shaft and is arranged at the discharge end of the feeding shaft; slots are provided on both sides of the sleeve; the driving end of the feeding mechanism passes through the slots and contacts the workpiece in the sleeve.

3. The feeding assembly for continuous welding of metal rings according to claim 2, characterized in that: The feeding mechanism includes a gear transmission box, a feeding motor, a transmission rod, a turntable and a feeding piece; the gear transmission box is arranged on the guide mechanism above the feeding mechanism, the feeding motor is installed on the gear transmission box, the input end of the feeding motor is connected to the output end of the gear transmission box, the output end of the gear transmission box is connected to the upper end of the transmission rod, and a rotating block is installed at the lower end of the transmission rod, the rotating block is connected to the push plate, and the push plate passes through the slot of the sleeve.

4. The feeding assembly for continuous welding of metal rings according to any one of claim 3, characterized in that: The guide mechanism comprises a guide rail, a sliding groove is provided at the bottom of the guide rail, the sliding groove is adapted to the sliding block, and the sliding block is connected to the top of the limiting plate.

5. A loading and unloading system for continuous welding of metal rings, characterized in that: It includes the loading assembly and the unloading assembly as described in claim 4; The material unloading assembly comprises a workbench, a turntable and a rotating mechanism arranged on the workbench, a clamping mechanism and a material unloading mechanism; The turntable has a plurality of workstations evenly spaced around it, each workstation has a corresponding workstation hole, a guide shaft is provided in the workstation hole, and a group of clamping mechanisms and unloading mechanisms are arranged on the outer circumference of the guide shaft; the rotating mechanism is installed on the workbench, and the driving end of the rotating mechanism is connected to the turntable to drive the turntable to rotate.

6. The loading and unloading system for continuous welding of metal rings according to claim 5, characterized in that: The unloading assembly also includes a positioning mechanism, the fixed end of which is installed on the workbench, and the working end of the positioning mechanism passes through the guide shaft and the turntable facing the loading mechanism and is inserted into the workpiece seam located at the discharge end of the loading mechanism.

7. The loading and unloading system for continuous welding of metal rings according to claim 6, characterized in that: The positioning mechanism includes a positioning cylinder, a positioning rod and a connecting rod; the positioning cylinder is fixed on a workbench, and the piston rod of the positioning cylinder is hinged to one end of the connecting rod; the positioning rod is L-shaped, the lower end of the vertical section of the positioning rod is hinged to the positioning cylinder, the middle part of the vertical section of the positioning rod is hinged to the other end of the connecting rod, the upper end of the vertical section of the positioning rod is connected to the inner end of the horizontal section of the positioning rod, and the outer end of the horizontal section of the positioning rod is the working end.

8. The loading and unloading system for continuous welding of metal rings according to any one of claims 5 to 7, characterized in that: The material unloading mechanism comprises a spring and a retaining ring which are sequentially sleeved on the outside of the guide shaft, the inner end of the spring is connected to the work station hole, and the outer end of the spring is connected to the retaining ring.

9. The loading and unloading system for continuous welding of metal rings according to claim 8, characterized in that: The clamping mechanism comprises a plurality of clamping plates distributed along the circumference of the guide shaft and a clamping cylinder, wherein the clamping plates are connected to the piston rod of the clamping cylinder.

10. A method for loading and unloading metal rings based on the loading and unloading system as claimed in claim 9, characterized in that: The method includes: Loading: The workpiece is placed on the loading shaft with the seam facing upwards, and moves to the initial loading position along with the loading mechanism; the loading mechanism and the retaining ring at the loading station are pressed to the limit position; the positioning mechanism is started, and the working end of the positioning rod is inserted into the seam of the workpiece at the discharge end of the loading mechanism; the feeding mechanism is started, so that the workpiece at the discharge end of the loading shaft moves to the guide shaft of the loading station; Clamping: The clamping piece at the bottom of the outer periphery of the guide shaft clamps the workpiece, the positioning rod is reset, and the clamping pieces on both sides of the guide shaft clamp the workpiece; Cutting: The loading mechanism is reset, the rotating mechanism works, the turntable rotates, the guide shaft on the loading station clamps the workpiece and rotates to the next station, and the next guide shaft rotates to the loading station to load the workpiece, and the workpiece is loaded and clamped on the guide shaft; when the guide shaft that clamps the workpiece rotates and reaches the welding station opposite the loading station, the welding operation is carried out; after welding is completed, the clamping plate releases the workpiece, the spring and the retaining ring are reset, and the welded workpiece is pushed away from the welding station to complete the workpiece unloading.

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