Telescopic spliced metal dust cover

Abstract

The utility model provides a telescopic splicing metal dust cover, include: platform and first installation base plate, first installation base plate installs in the side or top of ultrasonic welding machine activity head, follows ultrasonic welding activity head movement, telescopic cover body, telescopic cover body installs on first installation base plate, telescopic cover body includes the bottom installation of first installation base plate's outer layer fixed cover, still include the inner layer movable cover of the groove of outer layer fixed cover and installs, inner layer movable cover passes through the groove along outer layer fixed cover and moves axially, dust removal interface, dust removal interface sets up on first installation base plate, first air pipe, first air pipe is connected with dust removal machine through dust removal interface. The utility model discloses a telescopic cover body structure that inner layer movable cover moves along outer layer fixed cover forms, has realized the leap from'existing fixed gap'to'dynamic close -fitting seal ', has solved the problem that the slag and smoke escape fundamentally, and the trapping efficiency has improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic welding technology, and in particular to a telescopic splicing metal dust cover. Background Technology

[0002] In the production process of lithium battery modules, multiple cells usually need to be connected in series and parallel via connecting tabs (or busbars). Ultrasonic metal welding is a key process for completing this connection. This process uses high-frequency vibration waves from the welding head to be transmitted to the two metal surfaces to be welded. Under pressure, the metal surfaces rub against each other, and local heating causes the molecular layers to fuse together.

[0003] However, two significant problems exist in ultrasonic welding: First, weld spatter: The intense friction and energy impact cause tiny metal particles (weld slag) to splatter from the welding area. If these conductive metal particles land on the battery surface, they can cause serious safety hazards and quality problems such as short circuits and self-discharge. Second, fumes and dust: The welding process generates trace amounts of metallic fumes, which, along with the spattered weld slag, pollute the working environment, affecting the health of operators and posing a challenge to the cleanliness requirements of the workshop.

[0004] To address the aforementioned issues, existing technologies commonly employ a fixed metal dust collection hood installed near the ultrasonic welding head. This hood is connected to a central dust collection system via a dust collection duct. During welding, it generates negative pressure to attempt to draw away welding slag and fumes. The hood is typically square or round, with its opening facing the welding area, which presents the following drawbacks.

[0005] Poor versatility and insufficient flexibility: Its shape and size are fixed, and it can only be well applied to lithium battery packs or connecting pieces of a specific size. When the production line switches to weld battery packs of different models and sizes, the original fixed cover either cannot be effectively sealed due to its large opening, resulting in a decrease in capture efficiency; or it cannot be used due to its small opening or structural interference, requiring the replacement of the entire cover, which seriously affects production efficiency and flexible manufacturing capabilities.

[0006] Poor sealing and easy escape of welding slag: Due to the need to allow space for the welding head to descend and for products to enter and exit, the opening of the fixed cover is often large, making it difficult to form an effective sealed space with the surface of the workpiece being welded. This allows the welding slag with initial velocity generated during welding to easily escape from the negative pressure capture range of the dust collector and escape onto the workbench and battery pack, failing to completely eliminate the risk of short circuits.

[0007] Energy consumption and efficiency mismatch: To compensate for insufficient airtightness, it is usually necessary to increase the dust extraction airflow, which leads to energy waste. However, during welding, simply increasing the airflow is sometimes ineffective against high-speed spatter. Utility Model Content

[0008] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies. This invention proposes a telescopic splicing metal dust hood. This structure, through its telescopic and adjustable metal hood, can dynamically adapt to lithium battery packs of different sizes. During welding, it creates a relatively sealed negative pressure environment that closely adheres to the edge of the workpiece, thereby effectively capturing spatter and fumes, significantly improving dust removal efficiency and production flexibility.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A telescopic splicing metal dust collection hood includes: a platform and a first mounting base plate, the first mounting base plate being installed on the side or above the moving head of an ultrasonic welding machine, moving with the ultrasonic welding moving head; a telescopic hood body, the telescopic hood body being installed on the first mounting base plate, the telescopic hood body including an outer fixed hood installed at the bottom of the first mounting base plate, and an inner moving hood installed in a groove opened in the outer fixed hood, the inner moving hood moving axially along the outer fixed hood through the groove; a dust collection interface, the dust collection interface being opened on the first mounting base plate; a first air duct, the first air duct being connected to a dust collector through the dust collection interface; when the welding machine moving head moves downward, the inner moving hood first contacts the platform, and then the welding machine moving head continues to move downward, at this time the inner moving hood moves axially along the outer fixed hood, ensuring that during the movement of the welding moving head, the inner moving hood and the outer fixed hood form a closed space, and during welding, the dust collector sucks out the generated welding slag and fumes through the first air duct and the dust collection interface.

[0010] Preferably, it further includes a reset unit for driving the inner moving cover to reset, which is installed between the outer fixed cover and the inner moving cover via a connector.

[0011] Preferably, the telescopic cover is driven by a passive mechanical drive.

[0012] Preferably, the outer cover is a square-shaped metal sleeve, which is composed of two parts joined together.

[0013] Preferably, it further includes a sealing assembly installed between the sliding mating surfaces of the outer fixed cover and the inner moving cover, the sealing assembly being used to ensure airtightness when the outer fixed cover and the inner moving cover slide.

[0014] Preferably, the first duct is a flexible hose and is made of a wear-resistant material.

[0015] Preferably, it also includes a sealing element installed at the bottom of the inner moving cover, the sealing element being made of an elastic soft material to prevent the inner moving cover from damaging the electrode tab when it comes into contact with the root of the electrode tab.

[0016] Preferably, it also includes a dust removal mechanism installed outside the platform for auxiliary dust removal.

[0017] Preferably, the dust removal mechanism includes a welding base dust removal hood installed outside the platform, and a second mounting base plate is installed on the outside of the welding base dust removal hood; a second air duct is installed at the bottom of the second mounting base plate, and the second air duct is connected to a dust collector, through which the dust collector and the welding base dust removal hood absorb the flue gas that has escaped.

[0018] Preferably, the welding base dust cover is composed of two parts joined together.

[0019] Compared with the prior art, the beneficial effects of this utility model include: 1. The telescopic cover structure formed by the inner moving cover moving along the outer fixed cover achieves a leap from "having a fixed gap" to "dynamic fit and seal", fundamentally solving the problem of welding slag and fume emission, and significantly improving the collection efficiency.

[0020] 2. Unified operating space and sealing effect: When retracted, it creates space for easy operation; when extended, it forms a sealed enclosure specifically for dust injection. This perfectly solves the problem of continuous interference with operation caused by fixed enclosures.

[0021] 3. Energy saving and noise reduction: Due to its good airtightness, it can achieve excellent dust removal effect without large air volume, which helps to reduce system energy consumption and operating noise.

[0022] 4. Reliable structure and easy integration: The structure is simple and compact, and can be driven by mechanical passive force without complicated control. The cost is controllable and it is easy to modify and add to existing ultrasonic welding equipment.

[0023] 5. Highly adaptable and flexible: The telescopic stroke can adapt to clamps of different heights within a certain range, enhancing the production line's compatibility with multiple product models and reducing changeover and debugging time. Attached Figure Description

[0024] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a structural schematic diagram of a telescopic splicing metal dust removal hood proposed in this utility model; Figure 2 This is a schematic diagram showing the contact state between the platform and the inner moving cover of a telescopic splicing metal dust removal cover proposed in this utility model. Figure 3 For the appendix Figure 1 A sectional view; Figure 4 For the appendix Figure 2 A sectional view; Figure 5For the appendix Figure 3 Enlarged view of point A in the middle; The following are the labels in the diagram: 1. First air duct; 2. First mounting base; 3. Dust removal interface; 4. Outer fixed cover; 5. Inner moving cover; 6. Seal; 7. Welding base dust removal cover; 8. Spring sleeve; 9. Spring; 10. Second air duct; 11. Second mounting base; 12. Platform. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] According to one embodiment of the present invention, in conjunction with Figures 1-3 As shown.

[0027] A telescopic, modular metal dust cover comprises: a platform 12 for placing lithium batteries, and a first mounting plate 2 securely mounted on the movable head of an ultrasonic welding machine via bolts or sheet metal parts. The first mounting plate 2 can be mounted on the side or top of the movable head of the ultrasonic welding machine and can move synchronously with the ultrasonic welding head.

[0028] The dust collector also includes a telescopic cover installed at the bottom of the first mounting base 2. Within the telescopic cover, the outer fixed cover 4 is bolted to the bottom of the first mounting base 2. The inner movable cover 5 is installed within a groove in the outer fixed cover 4, and can move axially along the outer fixed cover 4 via this groove. A dust collection interface 3 is provided on the first mounting base 2, through which the first air duct 1 is installed and connected to the dust collector. When the welding machine's movable head moves downwards, the inner movable cover 5 first contacts the platform 12; as the welding machine's movable head continues to move downwards, the inner movable cover 5 moves axially along the outer fixed cover 4, ensuring that a closed space is formed between the inner movable cover 5 and the outer fixed cover 4 during the movement of the welding machine's movable head. During welding, the dust collector extracts the welding slag and fumes generated through the first air duct 1 and the dust collection interface 3.

[0029] Specifically, a reset unit is installed between the outer fixed cover 4 and the inner moving cover 5 via a connector, which is used to drive the inner moving cover 5 to reset. The reset element is a spring 9, and the connector is a spring sleeve 8.

[0030] In this embodiment, the telescopic cover adopts a passive mechanical drive. The outer fixed cover 4 is designed as a square cylindrical metal sleeve, which is spliced ​​together from the left and right parts. In addition, a sealing component is installed between the sliding mating surfaces of the outer fixed cover 4 and the inner moving cover 5. The sealing component is made of rubber gasket and is bonded and fixed to either side of the sliding mating surface of the two to ensure airtightness during sliding.

[0031] The first duct 1 is made of flexible hose and wear-resistant material. A sealing element 6 is bonded and fixed to the bottom of the inner moving cover 5. The sealing element 6 is made of elastic soft material, specifically rubber, to prevent the inner moving cover 5 from damaging the electrode tab when it comes into contact with the base of the electrode tab.

[0032] In addition, this embodiment also includes a dust removal mechanism installed on the outside of the platform 12 for auxiliary dust removal. This dust removal mechanism includes a welding base dust cover 7 bolted to the outside of the platform 12, and a second mounting base 11 bolted to the outside of the welding base dust cover 7. A second air duct 10 is embedded and fixed at the bottom of the second mounting base 11. This air duct is connected to a dust collector, and the dust collector and the welding base dust cover 7 work together to absorb the escaped fumes. The welding base dust cover 7 is also composed of two parts, left and right, joined together.

[0033] Working principle: During use, the welding movable head drives the telescopic cover to move downward as a whole. The sealing part 6 at the lower end of the inner movable cover 5 first contacts the platform 12, forming a sealed welding environment. Afterwards, the welding head continues to move downwards. At this time, the outer fixed cover 4 follows the welding head and continues to move downwards, compressing the spring 9. The inner moving cover 5 is limited by the platform 12 and cannot move downwards further, remaining in a relatively stationary state. At this time, the telescopic cover composed of the inner moving cover 5 and the outer fixed cover 4 is in a compressed state. The inner moving cover 5 is always in close contact with the platform 12, thus forming a temporary sealed cavity in the entire welding area during the welding process. When the dust collector is started, the welding slag and fumes generated during the welding process are drawn into the dust collector through the dust collection interface 3 at the top and the first air duct 1, which prevents the welding slag from splashing and the fumes from overflowing. Some of the fumes that escape during the welding process will also be drawn into the dust collector from the welding seat dust hood 7 through the second air duct 10. Simultaneously, after welding is completed, the movable head of the welding machine moves upward. At this time, the first mounting base plate 2 and the outer fixed cover 4 move upward synchronously. During the upward movement of the outer fixed cover 4, the spring 9 gradually resets. Before the spring 9 is fully reset, the spring force of the spring 9 presses the inner movable cover 5 onto the platform 12. At this time, the telescopic cover gradually stretches until the spring 9 is fully reset. At this time, the outer fixed cover 4 continues to move upward, and the spring 9 pulls the inner movable cover 5 upward away from the platform 12. At this time, the entire welding process is completed.

[0034] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A telescopic, modular metal dust collector hood, comprising: The platform and the first mounting base plate, the first mounting base plate being mounted on the side or above the moving head of the ultrasonic welding machine and moving with the ultrasonic welding moving head, characterized in that a telescopic cover body is mounted on the first mounting base plate, the telescopic cover body including an outer fixed cover mounted on the bottom of the first mounting base plate, and an inner moving cover mounted in a groove opened in the outer fixed cover, the inner moving cover moving axially along the outer fixed cover through the opened groove; A dust removal interface is provided on the first mounting base plate; The first air duct is connected to the dust collector via a dust removal interface; When the welding machine moving head moves down, the inner moving cover first contacts the platform, and then the welding machine moving head continues to move down. At this time, the inner moving cover moves axially along the outer fixed cover to ensure that the inner moving cover and the outer fixed cover form a closed space during the movement of the welding moving head. During welding, the dust collector sucks out the welding slag and smoke generated through the first air duct and the dust collection interface.

2. The telescopic splicing metal dust cover according to claim 1, characterized in that, It also includes a reset unit for driving the inner moving cover to reset, which is installed between the outer fixed cover and the inner moving cover via a connector.

3. The telescopic splicing metal dust cover according to claim 1, characterized in that, The telescopic cover is driven by a passive mechanical drive.

4. The telescopic splicing metal dust cover according to claim 1, characterized in that, The outer cover is a square-shaped metal sleeve, composed of two parts joined together.

5. The telescopic splicing metal dust collector cover according to claim 1, characterized in that, It also includes a sealing assembly installed between the sliding mating surfaces of the outer fixed cover and the inner moving cover, the sealing assembly being used to ensure airtightness when the outer fixed cover and the inner moving cover slide.

6. The telescopic splicing metal dust collector cover according to claim 1, characterized in that, The first duct is a flexible hose and is made of wear-resistant material.

7. The telescopic splicing metal dust collector cover according to claim 1, characterized in that, It also includes a seal installed at the bottom of the inner moving cover, the seal being made of a flexible, soft material to prevent the inner moving cover from damaging the electrode tab when it comes into contact with the base of the electrode tab.

8. The telescopic splicing metal dust collector cover according to claim 1, characterized in that, It also includes a dust removal mechanism installed outside the platform for auxiliary dust removal.

9. The telescopic splicing metal dust collector cover according to claim 8, characterized in that, The dust removal mechanism includes a welding base dust removal hood installed outside the platform, and a second mounting base plate is installed on the outside of the welding base dust removal hood; a second air duct is installed at the bottom of the second mounting base plate, and the second air duct is connected to a dust collector, which absorbs the flue gas that escapes through the dust collector and the welding base dust removal hood.

10. The telescopic splicing metal dust collector cover according to claim 9, characterized in that, The welding base dust cover is composed of two parts, left and right, joined together.

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