A can box laser welding device with an external shaping mechanism and a method thereof

Abstract

The present application relates to the technical field of can box, specifically to a can box laser welding device with an external shaping mechanism and a method thereof, comprising: a center column, the center column is used to make the raw material metal sheet for making the can body of the can box into a second state; a forming mechanism, the forming mechanism is used to bend the raw material metal sheet into a first state in cooperation with the center column; a processing mechanism, the processing mechanism is located below the forming mechanism, and the processing mechanism is used for welding, cooling and polishing treatment of the raw material metal sheet. The can box laser welding device with an external shaping mechanism and the method thereof are provided, when the can body of the can box is made, the raw material metal sheet can be primarily formed through the forming mechanism, the butt joint at the bottom of the metal sheet is welded, cooled and polished through the processing mechanism, the product quality is improved, and after the processing, the rectangular can bodies of the can box with different sizes can be prepared through the shaping mechanism, and the adaptability is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of can box, in particular to a can box laser welding device with an external shaping mechanism and a method thereof. BACKGROUND

[0002] As a widely used packaging food, cans play an important role in the food and beverage industries. With the increasing diversification of consumer demand for canned products, the quality and production efficiency of canned packaging have become the focus of the industry, and the manufacturing process of can boxes directly affects these aspects.

[0003] In the production process of can box bodies, welding operations are required. The traditional method is to place the sheet iron raw material in the mold and then weld the butt joint of the iron sheet. After welding, operations such as flanging and seaming are performed. However, the traditional method has drawbacks, such as the possibility of tiny welds and burrs during welding, which can affect product quality. In addition, there are many types of existing can shapes, in addition to the common circular shape, there are also rectangular shapes. In the traditional production process, a special mold corresponding to each type of rectangular can box is required for shaping, which is not very adaptable and needs to be improved. SUMMARY

[0004] The purpose of the present application is to provide a can box laser welding device with an external shaping mechanism and a method thereof to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a can box laser welding device with an external shaping mechanism, comprising:

[0006] A center column for making the raw material metal sheet for making a can box body into a second state of a can box body;

[0007] A shaping mechanism for bending the raw material metal sheet into a first state in cooperation with the center column;

[0008] A processing mechanism located below the shaping mechanism, the processing mechanism is used for welding, cooling and polishing the raw material metal sheet.

[0009] Preferably, the center column comprises:

[0010] An installation part for installing the center column;

[0011] A shaping part, the raw material metal sheet is bent into a first state at the shaping part, a fixing hole is provided at the shaping part, and a vacuum chuck is provided in the fixing hole for fixing the raw material metal sheet at the shaping part;

[0012] The shaping section has an installation groove, and a shaping mechanism is installed in the installation groove. The shaping mechanism is used to change the raw material metal sheet from a first state to a second state.

[0013] Preferably, the forming mechanism includes an upper pressure block and two symmetrically arranged side pressure blocks. When the upper pressure block and the side pressure blocks are joined together, their inner walls form a circular hole. A forming cavity is formed between the inner wall of the circular hole and the outer wall of the forming part. The raw material metal sheet is bent into a first state in the forming cavity. An upper push rod is connected to the top of the upper pressure block and is mounted on a first slider. A side push rod is connected to the outer wall of the side pressure block and is mounted on a second slider.

[0014] Preferably, a vacuum suction cup is embedded in the inner wall of the side pressure block (the vacuum suction cup is located in the mounting hole, and should not be too large, only large enough to hold the raw metal sheet, without affecting the bending effect). After the raw metal sheet is bent into the first shape, the side pressure block holds the raw metal sheet and transfers it to the shaping part.

[0015] Preferably, the first slider and the second slider are mounted on a movable base, which can move along six axes.

[0016] Preferably, the processing mechanism includes a functional block, on the side wall of which a laser welding device, a cooling device, and a grinding device are respectively provided. The laser welding device is used to weld the joint of the raw material metal sheet bent to the first state. The cooling device is used to cool the weld joint. The grinding device is used to grind the weld joint.

[0017] Preferably, a mounting shaft is provided on each of the front and rear surfaces of the functional block. The mounting shaft is rotatably mounted on the connecting blocks on both sides. A conversion motor is mounted on one of the connecting blocks to drive the mounting shaft to rotate (the output end of the conversion motor and the end of the mounting shaft are connected by bevel gear meshing). The connecting block is slidably mounted on a set of slide rods. The two ends of the slide rods are respectively fixed on the upright. A drive motor is mounted on the upright. The output end of the drive motor is connected to a lead screw. The lead screw passes through the connecting block and is connected to the threaded hole in the connecting block. By controlling the start of the drive motor to drive the lead screw to rotate, the connecting block can be adjusted to drive the functional block to move, thereby facilitating the processing of the metal sheet.

[0018] Preferably, the laser welding device, cooling device, and grinding device are all movably mounted on the side of the functional block.

[0019] Preferably, the shaping mechanism includes two movable parts arranged symmetrically at the top and bottom, a telescopic part between the two movable parts, a mounting post at the corner of the surface of the movable part, a rotating shaft rotatably mounted between the mounting posts on both sides, a top frame on the rotating shaft, a worm gear in the middle of the rotating shaft, a horizontal shaft rotatably mounted on the upper surface of the movable part, a connecting worm gear at each end of the horizontal shaft, the connecting worm gear and the worm gear meshing with each other, a central gear in the middle of the horizontal shaft, a movable plate slidably mounted on the movable part, a rack on the surface of the movable plate meshing with the central gear, a side ear plate at each end of the movable plate, and a set of adjusting push rods fixedly mounted on the movable part, the ends of the adjusting push rods connected to the side ear plates.

[0020] A laser welding method for cans with an external shaping mechanism includes the following steps:

[0021] S1: Loading: The raw metal sheet to be processed is placed and fixed at the processing position of the forming part by manual labor or robotic arms;

[0022] S2: Forming, by controlling the forming mechanism to bend the raw metal sheet into the first state;

[0023] S3: Processing. After the raw metal sheet is bent to the first state, the side pressure blocks on both sides are controlled to shrink and pull back the side pressure blocks 5. The processing mechanism performs welding, cooling and grinding on the bottom joint of the metal sheet.

[0024] S4: Shaping. After the raw metal sheet has been processed in the previous step, the side pressure blocks on both sides clamp and fix the raw metal sheet again, and the upper pressure block releases the raw metal sheet, transferring the raw metal sheet in the first state to the shaping mechanism. The shaping mechanism pushes and presses the raw metal sheet in the first state to change it into the second state.

[0025] S5: Unloading. After the raw material metal sheet changes to the second state, the shaping mechanism resets, and the product is removed manually or by a robotic arm.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The present invention proposes a laser welding device and method for canned food boxes with an external shaping mechanism. When manufacturing canned food boxes, the forming mechanism can perform preliminary shaping of the raw metal sheet, and the processing mechanism can perform welding, cooling and grinding of the bottom joint of the metal sheet to improve product quality. Furthermore, after processing, the shaping mechanism can be used to produce rectangular canned food boxes of different sizes, which is more adaptable.

[0028] 2. When the forming mechanism is working, the upper pressure block first descends to bend the metal sheet. The two ends of the metal sheet descend, and then the side pressure block descends to the bottom to continue bending the two ends of the metal sheet downwards. Then the side push rods at both ends extend to push the side pressure block towards the middle, so that the side pressure block presses the metal sheet onto the forming part, thus bending the metal sheet into the first state.

[0029] 3. When welding is required, the processing mechanism of the present invention rotates the laser welding device to below the metal sheet, and then the laser welding device rises to weld the metal sheet. The cooling device uses cold air to cool the weld area. A row of grinding wheels is embedded in the grinding device, and the middle of the grinding wheel is concave inward to match the metal sheet in the first state.

[0030] 4. When shaping the metal sheet, the side pressure block holds the metal sheet in its first state and moves it to the outside of the shaping mechanism. The top frame supports the metal sheet against the inner wall. By controlling the extension of the telescopic component, the top frame can push the metal sheet from the inside to deform it. The four top frames apply pressure to the metal sheet, thus changing it to the second state. If the size of the rectangular can needs to be changed, the extension of the adjusting push rod can be controlled to push the movable plate to move, thereby causing the horizontal shaft to rotate. The connecting worm gear rotates accordingly and drives the rotating shaft to rotate through the turbine, thereby causing the top frames on both sides to rotate outwards by a certain distance. The distance between the top frames changes, thus changing the side length of the metal sheet in the second state, making it more adaptable. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the device of the present invention.

[0032] Figure 2 This is a schematic diagram of the device of the present invention from another perspective.

[0033] Figure 3 This is a schematic diagram of the molding mechanism of the present invention.

[0034] Figure 4 This is a schematic diagram of the processing mechanism of the present invention.

[0035] Figure 5 This is a schematic diagram of the processing mechanism of the present invention from another perspective.

[0036] Figure 6 This is a schematic diagram of the central column 1 structure of the present invention.

[0037] Figure 7 This is a schematic diagram of the shaping mechanism of the present invention.

[0038] Figure 8 This is a schematic diagram of the connection structure of the movable component 14 of the present invention.

[0039] Figure 9This is a cross-sectional view of the metal sheet used as the raw material in this invention, in its first state.

[0040] Figure 10 This is a cross-sectional view of the second state of the raw material metal sheet of the present invention.

[0041] In the diagram: 1. Central column, 101. Mounting part, 102. Shaping part, 103. Upper pressure block, 2. Upper push rod, 3. First slider, 4. Side pressure block, 5. Side push rod, 6. Second slider, 7. Functional block, 8. Laser welding device, 801. Cooling device, 802. Grinding device, 803. Connecting block, 9. Conversion motor, 10. Lead screw, 11. Stand, 12. Drive motor, 13. Moving part, 14. Rotating shaft, 15. Top frame, 16. Telescopic part, 17. Turbine, 18. Horizontal shaft, 19. Central gear, 20. Connecting worm gear, 21. Adjusting push rod, 22. Moving plate, 23. Side ear plate, 24. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 10 The present invention provides a technical solution: a laser welding device for canned food boxes with an external shaping mechanism, comprising:

[0044] Central column 1, the central column 1 being used to shape the raw material metal sheet for making cans into a second state of can body, such as... Figure 10 As shown;

[0045] The forming mechanism, which works in conjunction with the central column 1 to bend the raw material metal sheet into a first state, such as... Figure 9 The above;

[0046] The processing mechanism is located below the forming mechanism and is used to weld, cool, and grind the raw metal sheet.

[0047] Central column 1 includes:

[0048] Mounting part 101 is used to install the center column 1. The installation method is not unique and can be reasonably set according to the requirements.

[0049] The forming part 102 is where the raw material metal sheet is bent and formed into a first state. There is a specific position mark at the forming part and a fixing hole is provided at the forming part. A vacuum suction cup is provided in the fixing hole to fix the raw material metal sheet at the forming part 102.

[0050] The shaping part 103 is provided with a mounting groove, and a shaping mechanism is provided in the mounting groove. The shaping mechanism is used to change the raw material metal sheet from a first state to a second state.

[0051] The forming mechanism includes an upper pressure block 2 and two symmetrically arranged side pressure blocks 5. A vacuum suction cup (located within a mounting hole, not too large, only large enough to hold the raw metal sheet, without affecting the bending effect) is embedded in the inner wall of the side pressure block 5. After the raw metal sheet is bent into its first shape, the side pressure block 5 holds it and transfers it to the forming part 103. When the upper pressure block 2 and the side pressure block 5 are joined together, their inner walls form a circular hole. A forming cavity is formed between the inner wall of the circular hole and the outer wall of the forming part 102. The raw metal sheet is bent into its first state within the forming cavity. An upper push rod 3 is connected to the top of the upper pressure block 2 and is mounted on the first slider 4. A side push rod 6 is connected to the outer wall of the side pressure block 5 and is mounted on the second slider 7. The first slider 4 and the second slider 7 are mounted on a movable seat. The movable seat can move in six axes. This six-axis movement can be achieved through a slide rail structure, a common technique, and will not be elaborated upon here. When the metal sheet is placed in the forming area, the upper pressure block 2 first descends to bend the metal sheet. The two ends of the metal sheet descend, and then the side pressure block 5 descends to the bottom to continue bending the two ends of the metal sheet downwards. Then the side push rods 6 at both ends extend to push the side pressure block 5 towards the middle, so that the side pressure block 5 presses the metal sheet onto the forming part 102, thus bending the metal sheet into the first state.

[0052] The processing mechanism includes a functional block 8, on which a laser welding device 801, a cooling device 802, and a grinding device 803 are respectively provided. These devices are all mature technologies under the existing technology, and their specific structures will not be described in detail. The laser welding device 801 is used to weld the joint of the raw material metal sheet bent to the first state. The cooling device 802 is used to cool the welded joint. The grinding device 803 is used to grind the welded joint. A mounting shaft is provided on each of the front and rear surfaces of the functional block 8. The mounting shafts are rotatably mounted on the connecting blocks 9 on both sides. A conversion motor 10 is mounted on one of the connecting blocks 9. The conversion motor 10 is used to drive the mounting shaft to rotate (the output end of the conversion motor 10 and the end of the mounting shaft are connected by bevel gear meshing), thereby adjusting different processing methods. The connecting block 9 is slidably mounted on a set of slide rods. The two ends of the slide rods are respectively fixed on the stand 12. A drive motor 13 is mounted on the stand 12. The output end of the drive motor 13 is connected to a lead screw 11. The lead screw 11 passes through the connecting block 9 and is connected to the threaded hole in the connecting block 9. By controlling the drive motor 13 to start and drive the lead screw 11 to rotate, the connecting block 9 can be adjusted to drive the functional block 8 to move, thereby facilitating the processing of the metal sheet.

[0053] The laser welding device 801, cooling device 802, and grinding device 803 are all movably mounted on the side of the functional block 8. For example, the laser welding device 801 can be retracted into the functional block 8 by a certain distance. When the laser welding device 801 is not in use, it is in a retracted state to prevent the functional block 8 from causing movement obstruction. When welding is required, the laser welding device 801 is rotated to the underside of the metal sheet, and then the laser welding device 801 rises to weld the metal sheet. The cooling device 802 uses cold air to cool the weld area. The grinding device 803 has a row of grinding wheels embedded in it. The middle of the grinding wheel is concave inward to match the metal sheet in the first state.

[0054] The shaping mechanism includes two symmetrically arranged movable parts 14, which can move up and down within a mounting slot. A telescopic part 17 is provided between the two movable parts 14. A mounting post is provided at the corner of the surface of the movable part 14. A rotating shaft 15 is rotatably mounted between the two mounting posts. A top frame 16 is provided on the rotating shaft 15. A turbine 18 is provided in the middle of the rotating shaft 15. A horizontal shaft 19 is rotatably mounted on the upper surface of the movable part 14. A connecting worm gear 21 is provided at both ends of the horizontal shaft 19, and the connecting worm gear 21 and the turbine 18 are meshed. A central gear 20 is provided in the middle of the horizontal shaft 19. A movable plate 23 is slidably mounted on the movable part 14. A rack is provided on the surface of the movable plate 23 and meshes with the central gear 20. A side ear plate 24 is provided at each end of the movable plate 23. A fixed mounting plate is provided on the movable part 14. A set of adjusting push rods 22 are installed, with the ends of the adjusting push rods 22 connected to the side ear plate 24. When the side pressure block 5 sucks the metal sheet in the first state and moves it to the outside of the shaping mechanism, the top frame 16 abuts against the inner wall of the metal sheet and supports it. By controlling the extension of the telescopic member 17, the top frame 16 can push the metal sheet from the inside of the metal sheet to deform it. The four top frames 16 apply pressure to the metal sheet and thus change it to the second state. If the size of the rectangular can needs to be changed, the adjusting push rods 22 can be extended to push the movable plate 23 to move, thereby causing the horizontal shaft 19 to rotate. The connecting worm gear 21 rotates accordingly and drives the rotating shaft 15 to rotate through the turbine 18, thereby causing the top frames 16 on both sides to rotate outward by a certain distance at the same time. The distance between the top frames 16 changes, thereby changing the side length of the metal sheet in the second state, making it more adaptable.

[0055] A laser welding method for cans with an external shaping mechanism includes the following steps:

[0056] S1: Feeding: The raw metal sheet to be processed is placed at the processing position of the forming part 102 and fixed by manual labor or robotic arms;

[0057] S2: Forming, by controlling the forming mechanism to bend the raw metal sheet into the first state;

[0058] S3: Processing. After the raw metal sheet is bent into the first state, the side pressure blocks 5 on both sides are controlled to shrink and pull back. The processing mechanism performs welding, cooling and grinding on the bottom joint of the metal sheet.

[0059] S4: Shaping. After the raw metal sheet is processed in the previous step, the side pressure blocks 5 on both sides clamp and fix the raw metal sheet again, and the upper pressure block 2 releases the raw metal sheet and transfers the raw metal sheet in the first state to the shaping mechanism. The shaping mechanism pushes and presses the raw metal sheet in the first state to change it into the second state.

[0060] S5: Unloading. After the raw material metal sheet changes to the second state, the shaping mechanism resets, and the product is removed manually or by a robotic arm.

[0061] When manufacturing canned food containers, the forming mechanism can initially shape the raw metal sheet, and the processing mechanism can weld, cool and grind the joint at the bottom of the metal sheet to improve product quality. After processing, the shaping mechanism can produce rectangular canned food containers of different sizes, making them more adaptable.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for canned food boxes with an external shaping mechanism, characterized in that: Including: A central column, used to shape the raw metal sheet for making cans into a second state of can body; the central column includes: Mounting section, the mounting section being used to mount the central column; In the forming section, the raw metal sheet is bent and formed into a first state. A fixing hole is provided in the forming section, and a vacuum suction cup is provided in the fixing hole to fix the raw metal sheet in the forming section. The shaping section has an installation groove, and a shaping mechanism is installed in the installation groove. The shaping mechanism is used to change the raw metal sheet from a first state to a second state. The shaping mechanism includes two movable parts arranged symmetrically at the top and bottom, a telescopic part between the two movable parts, an installation column at the corner of the surface of the movable part, a rotating shaft rotatably installed between the two installation columns, a top frame on the rotating shaft, a turbine in the middle of the rotating shaft, a horizontal shaft rotatably installed on the upper surface of the movable part, a connecting worm gear at each end of the horizontal shaft, the connecting worm gear and the turbine gear meshing, a central gear in the middle of the horizontal shaft, a movable plate slidably installed on the movable part, a rack on the surface of the movable plate meshing with the central gear, a side ear plate at each end of the movable plate, and a set of adjusting push rods fixedly installed on the movable part, the ends of the adjusting push rods connected to the side ear plates. A forming mechanism is used to cooperate with a central column to bend the raw material metal sheet into a first state. The forming mechanism includes an upper pressure block and two symmetrically arranged side pressure blocks. A vacuum suction cup is embedded in the inner wall of the side pressure block. When the raw material metal sheet is bent into the first state, the side pressure block sucks up the raw material metal sheet and transfers it to the shaping part. The processing mechanism is located below the forming mechanism and is used to weld, cool, and grind the raw metal sheet.

2. The laser welding device for cans with an external shaping mechanism according to claim 1, characterized in that: When the upper pressure block and the side pressure block are joined together, the inner wall forms a circular hole, and a forming cavity is formed between the inner wall of the circular hole and the outer wall of the forming part. The raw material metal sheet is bent into a first state in the forming cavity. The top of the upper pressure block is connected to an upper push rod, which is installed on the first slider. The outer wall of the side pressure block is connected to a side push rod, which is installed on the second slider.

3. The laser welding device for cans with an external shaping mechanism according to claim 2, characterized in that: The first and second sliders are mounted on a movable base, which can move along six axes.

4. The laser welding device for cans with an external shaping mechanism according to claim 1, characterized in that: The processing mechanism includes a functional block, on the side wall of which a laser welding device, a cooling device, and a grinding device are respectively provided. The laser welding device is used to weld the joint of the raw material metal sheets bent to the first state. The cooling device is used to cool the weld joint. The grinding device is used to grind the weld joint.

5. The laser welding device for cans with an external shaping mechanism according to claim 4, characterized in that: Each of the front and rear surfaces of the functional block is provided with a mounting shaft. The mounting shaft is rotatably mounted on the connecting blocks on both sides. A conversion motor is mounted on one of the connecting blocks. The conversion motor is used to drive the mounting shaft to rotate. The connecting block is slidably mounted on a set of slide rods. The two ends of the slide rods are respectively fixed on the upright. A drive motor is mounted on the upright. The output end of the drive motor is connected to a lead screw. The lead screw passes through the connecting block and is connected to the threaded hole in the connecting block.

6. The laser welding device for cans with an external shaping mechanism according to claim 4, characterized in that: The laser welding device, cooling device, and grinding device are all movably mounted on the side of the functional block.

7. A laser welding method for cans with an external shaping mechanism according to any one of claims 1-6, characterized in that: It includes the following steps: S1: Loading: The raw metal sheet to be processed is placed and fixed at the processing position of the forming part by manual labor or robotic arms; S2: Forming, by controlling the forming mechanism to bend the raw metal sheet into the first state; S3: Processing. After the raw metal sheet is bent into the first state, the side pressure blocks on both sides are controlled to shrink and pull back. The processing mechanism performs welding, cooling and grinding on the bottom joint of the metal sheet. S4: Shaping. After the raw metal sheet has been processed in the previous step, the side pressure blocks on both sides clamp and fix the raw metal sheet again, and the upper pressure block releases the raw metal sheet, transferring the raw metal sheet in the first state to the shaping mechanism. The shaping mechanism pushes and presses the raw metal sheet in the first state to change it into the second state. S5: Unloading. After the raw material metal sheet changes to the second state, the shaping mechanism resets, and the product is removed manually or by a robotic arm.

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