A welding positioning device

Abstract

The utility model discloses a kind of welding positioning devices, applied to magnetic levitation circulating line, welding station is equipped on the magnetic levitation circulating line, including being positioned mechanism in secondary in welding station upper portion;The secondary positioning mechanism includes dust baffle and secondary positioning piece, product cavity is equipped on the dust baffle, and the secondary positioning piece is arranged in product cavity;The magnetic levitation circulating line can drive product fixture on it to move to the just below of the product cavity.This application is positioned on the basis of existing jig preliminary, secondary positioning mechanism is additionally arranged in welding station, the component aims at compensating incoming tolerance generated in the high-speed transmission of product in circulating line, and the processing and assembly cumulative tolerance of multiple products on different mover jigs, to adapt to the operation tempo of high-speed production line or high-capacity machine, meet the stringent requirements of high-speed magnetic levitation production line, also comprehensively improve the stability and welding yield of surrounding welding.

Description

Technical Field

[0001] This utility model relates to the field of battery cell manufacturing technology, specifically to a welding positioning device. Background Technology

[0002] Currently, most battery peripheral welding in the industry adopts a fixed workstation solution. This solution places the battery cells into specific workstations in sequence and can achieve precise fixation through a single positioning. However, its loading and unloading cycle limits the production capacity and is only suitable for low-speed production lines.

[0003] In contrast, high-speed production lines generally employ magnetic levitation circulating line systems, where moving jigs carry the products to the welding station. However, due to the large number of moving jigs and their inherent inconsistencies, coupled with the cumulative tolerances of incoming materials, processing, and assembly of the products and tooling, the tolerances of the welding trajectory can significantly increase. Therefore, traditional fixed positioning solutions are insufficient to meet the accuracy and efficiency requirements of high-speed production lines.

[0004] In summary, the fixed one-time precision positioning scheme mainly suffers from the following bottlenecks: Firstly, the positioning accuracy is low, which cannot meet the needs of high-speed production lines; Secondly, its inherent working mode determines its production capacity limit, which cannot be broken through through simple optimization; Third, this solution cannot overcome the problem of multiple tolerance accumulation caused by high-speed circulation lines. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to improve the positioning accuracy of product welding on a high-speed magnetic levitation circulating production line.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A welding positioning device is applied to a magnetic levitation circulation line, wherein the magnetic levitation circulation line is provided with a welding station, and includes a secondary positioning mechanism disposed above the welding station; the secondary positioning mechanism includes a dust baffle plate and a secondary positioning component, wherein the dust baffle plate is provided with a product cavity, and the secondary positioning component is disposed inside the product cavity; The magnetic levitation circulation line can move the product fixture on it to directly below the product cavity.

[0007] Based on the initial positioning of the existing fixture, this application adds a secondary positioning mechanism to the welding station. This component is designed to compensate for the incoming material tolerance generated during the high-speed transmission of products on the circulating line, as well as the cumulative tolerance of the processing and assembly of multiple products on different moving fixtures. This adapts to the operating rhythm of high-speed production lines or high-capacity machines, meets the stringent requirements of high-speed magnetic levitation production lines, and comprehensively improves the stability and welding yield of peripheral welding.

[0008] As a further embodiment of this utility model: the secondary positioning component includes at least one set of secondary short-side positioning components and secondary long-side positioning components, wherein the secondary short-side positioning components are placed on the short-side side of the product cavity, and the secondary long-side positioning components are placed on the long-side side of the product cavity.

[0009] As a further embodiment of this utility model: the secondary short side positioning component is provided in two sets, and the two sets of secondary short side positioning components are symmetrically distributed on the two short side sides of the product cavity.

[0010] As a further embodiment of this utility model: two sets of secondary long-side positioning components are provided, and the two sets of secondary long-side positioning components are symmetrically distributed on the two long-side sides of the product cavity.

[0011] As a further embodiment of this utility model: the secondary long side positioning component includes a long side positioning block and a frame. A long side floating guide rail is provided on the side of the long side positioning block facing the frame. A long side floating spring is provided at the bottom of the long side positioning block. The other end of the long side floating spring is connected to the long side floating guide rail. The frame is also provided with a long side centering cylinder that can drive the long side floating guide rail and the long side positioning block to move along the short side direction.

[0012] As a further embodiment of this utility model: the secondary short side positioning component includes a short side positioning block and a short side centering cylinder, wherein the short side positioning block is installed at the output end of the short side centering cylinder.

[0013] As a further embodiment of this utility model: a positioning support seat is set on one or both sides of the dust baffle, a lifting component is set on one or both sides of the dust baffle, and a lifting buffer assembly is set between the positioning support seat and the dust baffle.

[0014] As a further embodiment of this utility model: the positioning support is provided with a lifting guide rail, and the bottom of the dust baffle is provided with a sliding rod, which can be slidably connected with the lifting guide rail.

[0015] As a further embodiment of this utility model: the product fixture includes a fixture base plate, a set of positioning members is provided on the top of the fixture base plate, and a magnetic levitation mover that cooperates with the magnetic levitation circulation line is provided on the bottom of the fixture base plate.

[0016] As a further embodiment of this utility model: the primary positioning component includes two sets of long-side positioning components and two sets of short-side positioning components, wherein a straight-line module is provided at the bottom of one set of long-side positioning components and one of the short-side positioning components.

[0017] Compared with the prior art, the beneficial effects of this utility model are: First, based on the initial positioning of the existing fixture, this application adds a secondary positioning mechanism to the welding station. This component is designed to compensate for the incoming material tolerance generated during the high-speed transmission of products on the circulating line, as well as the cumulative tolerance of the processing and assembly of multiple products on different moving fixtures, so as to adapt to the operating rhythm of high-speed production lines or high-capacity machines. Secondly, with the cooperation of secondary short-side positioning components, secondary long-side positioning components, and lifting dust baffles, this application can significantly improve the final positioning accuracy of the product. This ensures that the welding path of the product's peripheral welding is highly consistent, effectively reducing the risk of trajectory deviation or weld breakage. It not only meets the stringent requirements of high-speed magnetic levitation production lines, but also comprehensively improves the welding yield of peripheral welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the welding positioning device according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the welding positioning device from another perspective, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the secondary positioning mechanism in an embodiment of the present invention; Figure 4 This is a side view of the secondary positioning mechanism according to an embodiment of the present utility model; Figure 5 This is a front view of the secondary positioning mechanism according to an embodiment of the present utility model; Figure 6 This is a structural schematic diagram of the secondary long-side positioning component according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the bottom structure of the secondary long-side positioning component according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the secondary short-side positioning component according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the product fixture in an embodiment of this utility model; Figure 10 This is a front view of the product fixture according to an embodiment of this utility model; Explanation of reference numerals in the attached figures: 1. Welding module support beam; 2. Y-axis linear module; 3. X-axis linear module; 4. Z-axis linear module; 5. Welding mechanism; 6. Magnetic levitation loop line; 7. Product fixture; 71. Magnetic levitation mover; 72. Fixture base plate; 73. Long side positioning component; 74. Short side positioning component; 75. Product; 8. Secondary positioning mechanism; 81. Positioning support base; 82. Lifting component; 83. Dust baffle; 84. Secondary short side positioning component; 841. Short side positioning block; 842. Short side centering cylinder; 85. Secondary long side positioning component; 851. Long side centering cylinder; 852. Long side linear guide rail; 853. Long side floating guide rail; 854. Long side positioning block; 855. Long side floating spring; 856. Positioning block buffer assembly; 86. Lifting guide rail; 87. Lifting buffer assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Reference Figure 1 and Figure 2 A welding positioning device includes a welding module support beam 1, a Y-axis linear module 2, an X-axis linear module 3, a Z-axis linear module 4, a welding mechanism 5, a magnetic levitation circulation line 6, a product fixture 7, and a secondary positioning mechanism 8. Two sets of welding module support beams 1 are vertically arranged, and the Y-axis linear module 2 is fixedly installed on the top of both sets of welding module support beams 1. The X-axis linear module 3 is installed at the output end of the Y-axis linear module 2, the Z-axis linear module 4 is installed at the output end of the X-axis linear module 3, and the welding mechanism 5 is installed at the output end of the Z-axis linear module 4. It should be noted that each pair of connection points can be detachably connected using bolts or pins.

[0021] The X-axis linear module 3 is perpendicular to the Y-axis linear module 2, and the Z-axis linear module 4 is perpendicular to the X-axis linear module 3. The Z-axis linear module 4 is set parallel to the welding module support beam 1.

[0022] By controlling the operation of the Y-axis linear module 2, the output end of the Y-axis linear module 2 can drive the X-axis linear module 3, the Z-axis linear module 4, and the welding mechanism 5 to move synchronously along the Y-axis linear module 2 in the Y-axis direction. By controlling the operation of the X-axis linear module 3, the output end of the X-axis linear module 3 can drive the Z-axis linear module 4 and the welding mechanism 5 to move synchronously along the X-axis linear module 3 in the X-axis direction. By controlling the operation of the Z-axis linear module 4, the output end of the Z-axis linear module 4 can drive the welding mechanism 5 to move synchronously along the Z-axis linear module 4 in the Z-axis direction. Moreover, the Y-axis linear module 2, X-axis linear module 3, and Z-axis linear module 4 all adopt linear modules commonly used in the field. This application does not improve the linear modules, and their specific structures will not be described in detail.

[0023] Reference Figure 1 and Figure 2 The frame formed by the welding module support beam 1 and the Y-axis linear module 2 is located outside the magnetic levitation circulation line 6. The magnetic levitation circulation line 6 can pass under the frame. Several sets of product fixtures 7 are installed above the magnetic levitation circulation line 6. Each product fixture 7 has a product (i.e., a battery cell) tightly attached to it, realizing the primary positioning of the product. The product fixture 7 can drive the product to move and be transported along the magnetic levitation circulation line 6. When the product moves directly under the welding mechanism 5, the product can be repositioned by the secondary positioning mechanism 8.

[0024] Reference Figure 9 and Figure 10 The product fixture 7 includes a magnetic levitation actuator 71, a fixture base plate 72, long-side positioning members 73, and short-side positioning members 74. The bottom of the fixture base plate 72 is provided with a magnetic levitation actuator 71 that can connect to the magnetic levitation loop line 6, allowing it to move along the loop line 6. Two sets of long-side positioning members 73 are symmetrically arranged on both sides of the top long side of the fixture base plate 72, and two sets of short-side positioning members 74 are symmetrically arranged on both sides of the top short side of the fixture base plate 72. The product 75 (in this application, the battery cell) is located between the long-side positioning members 73 and the short-side positioning members 74. The long-side positioning members 73 and the short-side positioning members 74 can be controlled by a micro linear module to move towards or away from the other long-side positioning member 73 and the other short-side positioning member 74 to adapt to changes in product size.

[0025] Reference Figure 3 The secondary positioning mechanism 8 includes a positioning support base 81, a lifting component 82, a dust baffle 83, a secondary short-side positioning component 84, a secondary long-side positioning component 85, a lifting guide rail 86, and a lifting buffer assembly 87. Two sets of positioning support bases 81 are provided, respectively installed on the side frames of the magnetic levitation loop line 6 or directly on the ground on both sides of the magnetic levitation loop line 6. The dust baffle 83 is located on top of the two sets of positioning support bases 81. Lifting components 82 can be detachably installed on both sets of positioning support bases 81. The top output ends of the two sets of lifting components 82 are detachably connected to both sides of the dust baffle 83. It should be noted that the lifting component 82 can be an electric cylinder or a linear motor; this application does not limit its use. Reference Figure 4Lifting buffer components 87 are installed at the upper part of both sets of positioning support seats 81. The top of the lifting buffer component 87 can contact the bottom of the dust baffle 83. The lifting buffer component 87 can buffer the descending dust baffle 83. The lifting buffer component 87 can be a spring.

[0026] Reference Figure 5 Lifting guide rails 86 are provided on the inner side of both sets of positioning support seats 81. Slide rods extend from the bottom of the dust baffle plate 83 to the sides. These slide rods can be slidably connected with the lifting guide rails 86. The lifting guide rails 86 are arranged vertically.

[0027] Reference Figure 3 The dust baffle 83 has a product cavity in the middle that can accommodate the product 75. The size of the product cavity is larger than the size of the product. Secondary long side positioning members 85 are provided on the two sets of long sides inside the product cavity, and secondary short side positioning members 84 are provided on the two sets of short sides inside the product cavity. The two sets of secondary long side positioning members 85 and the two sets of secondary short side positioning members 84 can perform secondary positioning of the product 75 entering the product cavity.

[0028] Reference Figure 6 and Figure 7 The secondary long-side positioning component 85 includes a frame, a long-side centering cylinder 851, a long-side linear guide rail 852, a long-side floating guide rail 853, a long-side positioning block 854, a long-side floating spring 855, and a positioning block buffer assembly 856. The long-side floating guide rail 853 is provided on the side of the long-side positioning block 854 facing the frame, and the long-side floating spring 855 is provided at the bottom of the long-side positioning block 854. The other end of the long-side floating spring 855 is connected to the long-side floating guide rail 853. The frame is also equipped with a long-side centering cylinder that can drive the long-side floating guide rail 853 and the long-side positioning block 854 to move along the short-side direction. 851; At the same time, a positioning block buffer assembly 856 is provided between the frame and the long side floating guide rail 853. The positioning block buffer assembly 856 can be a spring. Under the control of the long side centering cylinder 851, the long side floating guide rail 853 and the long side positioning block 854 can be driven along the short side of the battery. The two sets of long side positioning blocks 854 can move simultaneously to center. When they come into contact with the battery cell, if there are machining and assembly tolerances on the long side of the battery cell, the long side positioning block 854 moves along the long side floating guide rail 853 under the long side floating spring 855 to compensate for the machining and assembly tolerances of the battery cell.

[0029] Reference Figure 8 The secondary short-side positioning component 84 includes a short-side positioning block 841 and a short-side centering cylinder 842. The short-side positioning block 841 is installed at the output end of the short-side centering cylinder 842. Under the control of the short-side centering cylinder 842, the short-side positioning block 841 can be driven along the long side of the battery. The two sets of short-side centering cylinders 842 can move simultaneously to center the battery, thereby fixing the short side of the battery cell.

[0030] The specific operating principle of this application is as follows: Product fixture 7, carrying the pre-tack welded battery cell, enters the welding station of secondary positioning mechanism 8 under the drive of magnetic levitation circulation line 6. At this time, product fixture 7 unlocks the battery cell under the action of external unlocking mechanism, the battery cell stands upright, and the two large surfaces and the side surfaces are in a free state.

[0031] Under the action of the lifting component 82, the secondary positioning mechanism 8 descends to the working position. At this time, the long side positioning block 854, under the action of the long side centering cylinder 851, centers and positions the long side of the battery cell. After positioning and clamping, the short side positioning block 841, under the action of the short side centering cylinder 842, performs secondary precision positioning of the short side of the battery cell. Considering that there are certain differences in the consistency of each battery and each transfer cycle fixture, the long side positioning block 854 is designed as a mechanism with buffer floating, which can adapt to battery cells and fixtures with different tolerance ranges, thus ensuring the overall accuracy of the long and short side positioning of the battery cell. After the short side secondary positioning mechanism completes its action, the overall secondary positioning of the battery cell is completed.

[0032] At this time, the Z-axis linear module 4, along with the welding mechanism 5, descends to the initial starting point of the peripheral welding. Then, it performs a full-circle welding of the weld seam on the top cover of the battery cell. Under the coordinated action of the Y-axis linear module 2, the X-axis linear module 3, and the Z-axis linear module 4, it can complete any welding trajectory composed of arcs and straight lines in the plane.

[0033] During welding, the long side positioning block 854, the short side positioning block 841 and the dust baffle 83 can shield the battery cell to prevent welding spatter from hitting the top cover or the side of the product, thus preventing welding contamination. During welding, the welding mechanism 5 can blow out nitrogen welding shielding gas to ensure the overall welding effect.

[0034] Meanwhile, this application can also install a dust removal hood (not shown in the figure) at the welding point to remove welding fumes, ensuring the overall welding effect. After the overall peripheral welding is completed, the centering cylinder in the secondary positioning mechanism retracts, and the product fixture 7 then clamps and presses the battery cell on the large surface and side to ensure the relative position of the battery cell in the fixture. Afterwards, the lifting component 82 of the secondary positioning mechanism 8 controls the dust baffle 83 to rise, and the product fixture 7 after peripheral welding moves out of the processing station at the same time. The subsequent product fixture 7 moves into the secondary positioning welding station at the same time. This action is repeated to complete the online secondary positioning and peripheral welding of the battery cell.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A welding positioning device, applied to a magnetic levitation circulation line, wherein the magnetic levitation circulation line is provided with a welding station, characterized in that, It includes a secondary positioning mechanism located above the welding station; the secondary positioning mechanism includes a dust baffle and a secondary positioning component, the dust baffle has a product cavity, and the secondary positioning component is disposed inside the product cavity; The magnetic levitation circulation line can move the product fixture on it to directly below the product cavity.

2. The welding positioning device according to claim 1, characterized in that: The secondary positioning component includes at least one set of secondary short-side positioning components and secondary long-side positioning components, wherein the secondary short-side positioning components are placed on the short-side side of the product cavity, and the secondary long-side positioning components are placed on the long-side side of the product cavity.

3. The welding positioning device according to claim 2, characterized in that: The secondary short-side positioning components are provided in two sets, and the two sets of secondary short-side positioning components are symmetrically distributed on the two short-side sides of the product cavity.

4. A welding positioning device according to claim 2, characterized in that: The secondary long-side positioning component is provided in two sets, and the two sets of secondary long-side positioning components are symmetrically distributed on the two long-side sides of the product cavity.

5. A welding positioning device according to claim 2, characterized in that: The secondary long-side positioning component includes a long-side positioning block and a frame. A long-side floating guide rail is provided on the side of the long-side positioning block facing the frame. A long-side floating spring is provided at the bottom of the long-side positioning block, and the other end of the long-side floating spring is connected to the long-side floating guide rail. The frame is also provided with a long-side centering cylinder that can drive the long-side floating guide rail and the long-side positioning block to move along the short-side direction.

6. A welding positioning device according to claim 2, characterized in that: The secondary short side positioning component includes a short side positioning block and a short side centering cylinder, with the short side positioning block installed at the output end of the short side centering cylinder.

7. A welding positioning device according to claim 1, characterized in that: Positioning support seats are provided on one or both sides of the dust baffle, lifting components are provided on one or both sides of the dust baffle, and a lifting buffer assembly is provided between the positioning support seats and the dust baffle.

8. A welding positioning device according to claim 7, characterized in that: The positioning support is equipped with a lifting guide rail, and the bottom of the dust baffle is equipped with a sliding rod that can be slidably connected to the lifting guide rail.

9. A welding positioning device according to claim 1, characterized in that: The product fixture includes a fixture base plate, a primary positioning component is provided on the top of the fixture base plate, and a magnetic levitation actuator that cooperates with the magnetic levitation circulation line is provided on the bottom of the fixture base plate.

10. A welding positioning device according to claim 9, characterized in that: The primary positioning component includes two sets of long-side positioning components and two sets of short-side positioning components, wherein a straight-line module is provided at the bottom of one set of long-side positioning components and one of the short-side positioning components.

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