CN118650041A - Bending equipment and production line - Google Patents

Abstract

The application provides a bending device and a production line, and relates to the technical field of batteries. The bending device comprises a male die, a female die and a first positioning piece, wherein the male die is provided with a core; the female die is provided with a die cavity and a first bearing end, a die orifice of the die cavity is positioned at the first bearing end, the first bearing end is provided with a first direction, and the first direction is parallel to the first bearing end; the first driving piece is connected with the male die, the first driving piece can drive the male die to move, and the moving path of the male die is configured to enable the core to enter and exit the cavity from the cavity opening; the first locating piece is provided with a pair of first locating ends, the pair of first locating ends are used for respectively abutting against two ends of the plate to be bent, which are positioned at the first bearing end, in the first direction, and the distance between the pair of first locating ends can be adjusted. The bending device provided by the application can bend plates to be bent in different areas by controlling the depth of the insert core into the cavity and adjusting the distance between the pair of first positioning ends in a matching way, so that battery shells of various types can be produced.

Description

Bending equipment and production line

Technical Field

The present application relates to the field of battery technology, and in particular to a bending device and a production line.

Background Art

With the rapid development of the new energy industry, lithium-ion battery energy storage systems have been widely used. Large-capacity lithium batteries are iterating at a fast speed, so the production and manufacturing of battery shells also need to be upgraded and iterated accordingly. However, the existing bending devices can only produce a single type of battery shell, which has poor versatility. In other words, it limits the current demand for mass production of shells for batteries. In addition, if different product molds are changed, it involves high complexity and high cost.

Summary of the invention

In view of this, the present application provides a bending device and a production line, which are used to solve the problem that the existing bending device can only produce a single model of battery shells and has poor versatility, and solve the complexity and cost problems of changing molds.

This application provides the following technical solutions:

In a first aspect, the present application provides a bending device, the bending device comprising:

A male mold having a core;

A female mold, wherein the female mold has a cavity and a first bearing end, the cavity opening of the cavity is located at the first bearing end, and the first bearing end is used to bear the plate to be bent;

a first driving member, the first driving member is connected to the male mold, the first driving member can drive the male mold to move, and the moving path of the male mold is configured to enable the core to enter and exit the cavity from the cavity opening;

A first positioning member, wherein the first positioning member has a pair of first positioning ends, the pair of first positioning ends are respectively located on both sides of the cavity, and the pair of first positioning ends are used to respectively abut against two ends of the sheet material to be bent located at the first bearing end in the first direction; wherein the distance between the pair of first positioning ends in the first direction can be adjusted, and the first direction is parallel to the first bearing end.

In one embodiment of the first aspect, the bending device further comprises:

A second positioning member, the second positioning member has a pair of second positioning ends, and the pair of second positioning ends are respectively located on both sides of the cavity; wherein, the pair of second positioning ends are used to respectively abut against the two ends of the sheet material to be bent located at the first bearing end in the second direction, the distance between the pair of second positioning ends in the second direction can be adjusted, the second direction is parallel to the first bearing end, and the second direction and the first direction are perpendicular to each other.

In one embodiment of the first aspect, the first positioning member comprises:

A pair of first clamping arms, the pair of first clamping arms are arranged in sequence along the first direction, and the pair of first clamping arms are respectively located on both sides of the cavity opening;

A first adjusting portion, the first adjusting portion is connected to a pair of the first clamping arms, and the first adjusting portion can adjust the distance between the pair of the first clamping arms in the first direction; wherein the first clamping arms constitute the first positioning end;

And/or, the second positioning member includes:

A pair of second clamping arms, wherein the pair of second clamping arms are sequentially arranged along the second direction, and the pair of second clamping arms are respectively located at two sides of the cavity opening;

A second adjusting portion, wherein the second adjusting portion is connected to a pair of the second clamping arms, and the second adjusting portion can adjust the distance between the pair of the second clamping arms in the second direction; wherein the second clamping arms constitute the second positioning ends.

In one embodiment of the first aspect, the male mold comprises:

Two sub-molds, a gap between a pair of the sub-molds forming the mold cavity;

a third adjusting portion, the third adjusting portion being connected to the pair of sub-moulds, and the third adjusting portion being capable of adjusting a distance between the pair of sub-moulds in the first direction;

Wherein, the first driving member and the male mold are detachably connected.

In one embodiment of the first aspect, the die further comprises:

A lifting portion, the lifting portion being located in the cavity;

A first driving part is connected to the lifting part, and the first driving part can drive the lifting part to move from one end of the cavity away from the cavity opening to the cavity opening.

In one embodiment of the first aspect, the die further comprises:

The grabbing part is connected to the lifting part, and the grabbing part can grab the part of the bent plate close to the lifting part.

In one embodiment of the first aspect, the grasping portion is capable of sucking a portion of the bent plate close to the lifting portion.

In one embodiment of the first aspect, the lifting portion has a second bearing end, the second bearing end can abut against the plate, and the second bearing end is arranged as a planar structure; wherein the working surface of the core and the second bearing end are arranged in parallel.

In one embodiment of the first aspect, the core is arranged in an eight-shaped shape on both sides of the first direction, so that the core has a large end and a small end that are relatively arranged, and the large end is close to the cavity opening.

In a second aspect, the present application further provides a production line, the production line comprising:

A scoring device, the scoring device is used to score the plate to be bent so as to form a bending line on the surface of the plate to be bent;

A bending device, wherein the bending device is the bending device as described in any one of the above embodiments, and the bending device is used to bend the end of the plate after the marking once, so that the plate forms a U-shaped semi-finished shell;

A seam closing device, which is used to perform secondary bending on the end of the U-shaped semi-finished shell so that the end of the U-shaped semi-finished shell can be closed and a weld is formed;

A welding device is used for welding the weld seam to obtain a finished shell.

In one embodiment of the second aspect, the scoring device comprises:

A first positioning platform, wherein the first positioning platform has a third bearing end, and the third bearing end is used to bear the plate to be bent;

A third positioning member, the third positioning member having a pair of third positioning ends; the pair of third positioning ends are used to respectively abut against two ends of the sheet material to be bent located at the third bearing end in a third direction, the third direction being parallel to the third bearing end; wherein the distance between the pair of third positioning ends in the third direction can be adjusted;

A fourth positioning member, the fourth positioning member having a pair of fourth positioning ends; the pair of the fourth positioning ends are used to respectively abut against two ends of the sheet material to be bent located at the third bearing end in a fourth direction, the fourth direction is parallel to the third bearing end, and the fourth direction and the third direction are perpendicular to each other; wherein the distance between the pair of the fourth positioning ends in the fourth direction can be adjusted.

In one embodiment of the second aspect, the third positioning member includes:

a pair of third clamping arms, wherein the pair of third clamping arms are sequentially arranged along the third direction;

a fourth adjusting portion, the fourth adjusting portion being connected to the pair of the third clamping arms, the fourth adjusting portion being capable of adjusting the distance between the pair of the third clamping arms in the third direction; wherein the third clamping arms constitute the third positioning end;

And/or, the fourth positioning member includes:

A pair of fourth clamping arms, wherein the pair of fourth clamping arms are sequentially arranged along the fourth direction;

A fifth adjusting portion, wherein the fifth adjusting portion is connected to a pair of the fourth clamping arms, and the fifth adjusting portion can adjust the distance between the pair of the fourth clamping arms in the fourth direction; wherein the fourth clamping arms constitute the fourth positioning end.

In one embodiment of the second aspect, a first negative pressure adsorption port is disposed on the third supporting end.

In one embodiment of the second aspect, the seaming device comprises:

A second positioning platform, wherein the second positioning platform has a fourth bearing end, the fourth bearing end has a placement area, and the placement area is used to carry the U-shaped semi-finished shell;

A clamping member, the clamping member is connected to the second positioning platform, and the clamping member is used to clamp the U-shaped semi-finished shell located in the placement area;

A mold core, the mold core is placed in the inner cavity of the U-shaped semi-finished shell; the shape of the mold core matches the inner contour of the finished shell;

a pair of extrusion members, the pair of extrusion members being located on opposite sides of the placement area;

A second driving member, the second driving member is connected to a pair of the extrusion members, and the second driving member can drive the pair of the extrusion members to move closer to or away from each other in a fifth direction, and the fifth direction is parallel to the fourth bearing end, so that the extrusion member can push the corresponding end of the U-shaped semi-finished shell to bend to abut against the end of the mold core away from the fourth bearing end.

In one embodiment of the second aspect, the clamping member comprises:

a pair of fifth clamping arms, wherein the pair of fifth clamping arms are respectively located at two sides of the placement area;

The second driving part is connected to the pair of the fifth clamping arms, and the second driving part can drive the pair of the fifth clamping arms to move closer to or farther from each other.

In one embodiment of the second aspect, the welding device comprises:

A welding head, the welding head facing the weld;

A third driving member is installed on the second positioning platform and is connected to the welding head. The third driving member can drive the welding head to move along the welding seam.

In one embodiment of the second aspect, the mold core has a heat dissipation cavity, the heat dissipation cavity has an air inlet and an air outlet, and the air outlet faces the weld.

In one embodiment of the second aspect, the production line further comprises:

An airtightness detection device, the airtightness detection device comprising a pair of plugs, the two ends of the finished product shell respectively having openings, the pair of plugs being installed at the two ends of the finished product shell to seal the finished product shell;

Among them, the mold core is located in the finished shell, and one of the pair of plugs has an inflation hole, the inflation hole is connected to the air inlet, and the mold core is provided with a clearance groove on the side facing the weld, the clearance groove extends along the extension direction of the weld, and the structure is connected to the air outlet.

In one embodiment of the second aspect, the production line further comprises:

A cleaning device, the cleaning device comprising a support member, a cleaning flywheel, a suction member and a fourth driving member, the cleaning flywheel and the support member are rotatably connected, the fourth driving member is connected to the cleaning flywheel, the fourth driving member can drive the cleaning flywheel to rotate, and the suction member is connected to the support member, the suction member can suck dust at the cleaning flywheel; wherein the support member has an insertion end, the insertion end can be inserted into the inner cavity of the finished product shell, and the flywheel is located at the insertion end.

In one embodiment of the second aspect, the production line further comprises:

A robotic arm and a negative pressure suction cup, wherein the end of the robotic arm is connected to the negative pressure suction cup, and the robotic arm can drive the negative pressure suction cup to move within a preset range; wherein the scoring device, the bending device, the seaming device and the welding device are all located within the preset range.

According to the bending device of the above embodiment, it is possible to bend plates of different areas by controlling the depth of the core inserted into the cavity and adjusting the distance between a pair of first positioning ends, thereby being used to produce various types of battery shells, thereby improving the versatility of the bending device; obviously, with the upgrade and iteration of the battery shell size, there is no need to significantly upgrade and transform the bending equipment, thereby reducing the cost of equipment upgrade and iteration.

In addition, the present application also relates to a production line. Since the above-mentioned bending device has the above-mentioned technical effects, the production line including the bending device should have the same technical effects, which will not be repeated here.

In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a first working state of a bending device in an embodiment;

FIG2 is a schematic diagram of a second working state of a bending device in an embodiment;

FIG3 is a schematic diagram of a third working state of a bending device in an embodiment;

FIG4 is a schematic structural diagram of a female mold of a bending device in one embodiment;

FIG5 is a schematic diagram of the assembly structure of a lifting portion and a first driving portion of a bending device in one embodiment;

FIG6 is a schematic diagram of the assembly structure of a core and a first driving member of a bending device in an embodiment;

FIG7 is a schematic structural diagram of a scribing device from one viewing angle in an embodiment;

FIG8 is a schematic structural diagram of a scoring device in another embodiment from another perspective;

FIG9 is a schematic diagram of a first working state of a seam-seaming device in an embodiment;

FIG10 is a schematic diagram of a second working state of a seam-seaming device in an embodiment;

FIG11 is a schematic structural diagram of a mold core of a seam-joining device from one perspective in one embodiment;

FIG12 is a schematic structural diagram of a mold core of a seam-joining device from another perspective in one embodiment;

FIG13 is a schematic structural diagram of an airtightness detection device in an embodiment;

FIG14 is a schematic diagram of the structure of a cleaning device in one embodiment;

FIG. 15 is a partial enlarged view of point A in FIG. 14 .

Description of main component symbols:

100-plate; 110-bending line; 200-marking device; 210-fourth positioning member; 211-fourth clamping arm; 212-fifth adjusting part; 220-third positioning member; 221-third clamping arm; 222-fourth adjusting part; 230-first negative pressure adsorption port; 240-first positioning platform; 241-third bearing end; 300-bending device; 310-core; 320-first driving member; 330-first positioning member; 331-first clamping arm; 332-first adjusting part; 340-die; 341-first bearing end; 342-first long groove; 343-second long groove; 344-cavity; 345-cavity mouth; 350-second positioning member; 351-second adjusting part ;352-second clamping arm;360-lifting part;361-second bearing end;362-grasping part;370-first driving part;400-U-shaped semi-finished shell;410-welding seam;500-seaming device;510-clamping member;511-fifth clamping arm;512-second driving part;520-second positioning platform;521-fourth bearing end;530-extrusion member;540-core;541-air inlet;542-heat dissipation cavity;543-air outlet;544-avoidance groove;600-welding head;700-plug;710-inflating hole;800-cleaning device;810-support member;811-insertion end;820-suction member;830-flywheel;900-finished shell.

DETAILED DESCRIPTION

The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified.

In the related technology, the existing battery aluminum shell production adopts traditional bending and welding technology. The basic steps of this technology include: Material preparation: First, select suitable aluminum alloy materials, such as 3003 or 6000 series aluminum alloys, which have good corrosion resistance, processability and weldability. Cutting: Use laser cutting or shearing machine to cut aluminum alloy sheets into aluminum sheets of required size. Bending: Use a bending machine to bend the aluminum sheet according to the three-dimensional shape of the battery shell. The angle and size need to be precisely controlled during the bending process to ensure that the various parts of the shell can fit tightly. Welding: The aluminum sheet after bending needs to be welded by T I G (tungsten inert gas shielded welding), M I G (metal inert gas shielded welding) or laser welding to connect the various components to form a closed shell. Welding is a key step to ensure the sealing and strength of the shell, but it may also cause thermal deformation and weld quality problems. Surface treatment: After welding, the shell is subjected to necessary surface treatment, such as grinding, sandblasting, electrophoretic coating, powder electrostatic spraying, etc., to improve its corrosion resistance and appearance quality. Inspection and assembly: Finally, the finished product shell is subjected to quality inspection, including leakage test, dimension inspection, etc. After passing the inspection, the battery cell is assembled, including the installation of safety valves, poles, insulating parts and other components, and finally the battery packaging is completed.

With the rapid development of the new energy industry, lithium-ion battery energy storage systems have been widely used. Large-capacity lithium batteries are iterating at a fast speed, so the production and manufacturing of battery shells also need to be upgraded and iterated accordingly. However, the existing bending devices can only produce a single type of battery shell, which has poor versatility. In other words, it limits the current demand for mass production of battery shells.

As shown in Figures 1, 2, 3 and 4, in order to solve the above technical problems, an embodiment of the present application provides a bending device, the bending device 300 includes a male mold, a female mold 340, a first driving member 320 and a first positioning member 330, the male mold has a core 310; the female mold 340 has a cavity 344 and a first bearing end 341, the cavity 344 has a cavity 345 located at the first bearing end 341, and the first bearing end 341 is used to carry the plate 100 to be bent; the first driving member 320 is connected to the male mold, and the first driving member 320 is connected to the male mold. Part 320 can drive the punch to move, and the moving path of the punch is configured to enable the core 310 to enter and exit the cavity 344 from the cavity opening 345; the first positioning part 330 has a pair of first positioning ends, and the pair of first positioning ends are respectively located on both sides of the cavity opening 345, and the pair of first positioning ends are used to respectively abut against the two ends of the to-be-bent sheet 100 located at the first supporting end 341 in the first direction; wherein, the distance between the pair of first positioning ends in the first direction can be adjusted, and the first direction is parallel to the first supporting end 341.

In this embodiment, the punch is the core component of the bending device 300 that actively applies the deformation force, and the core 310 thereon is designed to match the shape of the required bending sheet 100. When the core 310 enters the cavity 344 of the die 340, it will apply pressure to the sheet 100 placed on the first bearing end 341 of the die 340, thereby achieving bending. Among them, the moving path of the punch ensures that the core 310 can smoothly enter and exit the cavity 344, which is a key action for bending molding; for example, the moving path of the punch is set to be perpendicular to the end face of the first bearing end 341, and the end face of the first bearing end 341 is used to bear the sheet 100.

Obviously, the female mold 340 is provided with a cavity 344 that cooperates with the male mold core 310, and its first bearing end 341 is designed to stably bear the sheet 100 to be bent, ensuring that the sheet 100 is fixed in position during the bending process without sliding or shifting. The cavity opening 345 is located at the first bearing end 341, which is the channel for the core 310 to enter and exit the cavity 344, and is also the precise area for the sheet 100 to deform.

For example, the present application is to bend the sheet 100 into a U-shape, and the cavity 344 can be set to be groove-shaped; wherein, the first bearing end 341 is set horizontally, the sheet 100 is placed on the first bearing end 341, and the cavity 344 is located in the middle of the sheet 100, thereby, by driving the punch to move vertically, the portion of the sheet 100 located at the cavity opening 345 is squeezed into the cavity 344, thereby driving the portions of the sheet 100 located on both sides of the cavity 344 to be bent to a vertical state, and obtaining a U-shaped semi-finished shell 400. Optionally, the cross section of the cavity 344 is set to be square or rectangular.

It should be noted that, in this embodiment, the outward rebound of the side wall of the U-shaped semi-finished shell 400 can be reduced by controlling the depth of the core 310 inserted into the cavity 344 .

In addition, as shown in FIG6 , the first driving member 320 is responsible for driving the punch to move along the moving path to achieve precise pressure on the plate 100. This usually involves a hydraulic, pneumatic or electric driving system to ensure stable output and precise control of the force. For example, the first driving member 320 is a hydraulic cylinder; of course, in other embodiments, the first driving member 320 may also be a pneumatic cylinder, an electric push rod, etc.

It should be noted that the pair of first positioning ends of the first positioning member 330 plays an important role in fixing the two ends of the plate 100 and ensuring the bending accuracy. The pair of first positioning ends are located on both sides of the cavity 345 of the die 340, and are in close contact with the two ends of the plate 100 to be bent, so as to prevent the plate 100 from unnecessary movement or deformation during the bending process.

Of course, the distance between the first positioning ends is set to be adjustable, which means that the device can adapt to plates 100 of different widths, increasing the versatility and flexibility of the bending device 300. It is easy to understand that, for example, the first direction refers to the main deformation direction of the plate 100 during the bending process, and is set to be parallel to the first bearing end 341. In other words, the direction in which the first positioning member 330 abuts against the two ends of the plate 100 is the first direction, and the adjustable distance design therebetween ensures that no matter how the width of the plate 100 changes, the best positioning effect can be obtained through adjustment, ensuring the accuracy and consistency of the bending.

For example, a pair of first positioning ends are arranged in sequence and spaced apart in the first direction, so that the pair of positioning ends can be respectively located on both sides of the cavity opening 345. Of course, in other embodiments, it is also possible to ensure that the pair of first positioning ends can move along the first direction on the premise that the pair of first positioning ends are respectively located on both sides of the cavity opening 345, without emphasizing that the pair of first positioning ends must be located on the same straight line extending along the first direction.

Of course, in this embodiment, the pair of first positioning ends can be set to move synchronously or separately, which is not specifically limited here. Obviously, setting the pair of first positioning ends to move separately can further increase the application range of the bending device 300 provided by the present application.

For example, when the plate 100 is subjected to asymmetrical bending, the distance between a pair of positioning ends and the cavity opening 345 is adjusted respectively to achieve the above-mentioned asymmetrical bending.

For example, the first positioning end is configured to be in contact with the end of the plate 100 in a plane contact. Of course, it can also be configured to be an arc surface, a conical surface, etc.

It is easy to understand that the plate 100 has a length direction and a width direction. If it is necessary to bend the plate 100 in the length direction, the plate 100 needs to be placed on the first supporting end 341 and keep the first direction and the length direction parallel; if it is necessary to bend the plate 100 in the width direction, the plate 100 needs to be placed on the first supporting end 341 and keep the first direction and the width direction parallel.

By using the bending device provided by the present application, it is possible to control the depth of the core 310 inserted into the cavity 344 and adjust the distance between the pair of first positioning ends to achieve the ability to bend the plate 100 to be bent of different areas, and then use it to produce battery shells of various models, thereby improving the versatility of the bending device 300; obviously, with the upgrade and iteration of the battery shell size, there is no need to significantly upgrade and transform the bending equipment, thereby reducing the cost of equipment upgrade and iteration. In addition, the first positioning member 330 can ensure the accuracy of the bending of the plate 100.

As shown in Figures 1 and 4, in some embodiments, the bending device 300 also includes a second positioning member 350, which has a pair of second positioning ends, and the pair of second positioning ends are respectively located on both sides of the cavity 345; wherein the pair of second positioning ends are used to respectively abut against the two ends of the to-be-bent sheet material 100 located at the first bearing end 341 in the second direction, and the distance between the pair of second positioning ends in the second direction can be adjusted, the second direction is parallel to the first bearing end 341, and the second direction and the first direction are perpendicular to each other.

The bending device 300 further demonstrates its highly precise and flexible design, including not only the aforementioned punch, die 340, first driving member 320 and first positioning member 330, but also a second positioning member 350 to achieve precise positioning of the sheet 100 in two vertical directions, with the following specific advantages:

1. Enhanced stability and precision: The combined use of the first positioning member 330 and the second positioning member 350 ensures the precise fixation of the sheet 100 to be bent in two mutually perpendicular directions, and can maintain the stability of the sheet 100 even in complex or high-precision bending operations, thereby greatly improving the bending precision and consistency of the finished product.

2. Strong adaptability: The distance between a pair of first positioning ends and a pair of second positioning ends can be adjusted, which means that the bending device 300 can adapt to plates 100 of different sizes and specifications, thereby improving the versatility and flexibility of the equipment and being suitable for diversified production needs.

3. Three-dimensional control: Through precise positioning in the first direction and the second direction, the three-dimensional spatial position of the plate 100 is actually controlled, which is crucial for difficult operations such as complex curved surfaces and multi-angle bending, and can effectively avoid distortion or deformation problems during the bending process.

4. Improve efficiency and automation level: The first driving member 320 drives the precise movement of the punch, and with the automatic adjustment of the two sets of positioning members, it can be integrated into the automated production line to achieve fast and continuous 100-degree bending of the plate, reduce manual intervention, and improve production efficiency.

Exemplarily, the plate 100 has a length direction and a width direction. If it is necessary to bend the plate 100 in the length direction, the plate 100 needs to be placed on the first supporting end 341 and keep the first direction parallel to the length direction, and the second direction parallel to the width direction; if it is necessary to bend the plate 100 in the width direction, the plate 100 needs to be placed on the first supporting end 341 and keep the first direction parallel to the width direction, and the second direction parallel to the length direction.

Optionally, since the first positioning member 330 and the second positioning member 350 have the same function and principle, the structures of the first positioning member 330 and the second positioning member 350 can be set to be the same, thereby reducing costs.

As shown in Figure 4, in some embodiments, the first positioning member 330 includes a pair of first clamping arms 331 and a first adjusting portion 332, the pair of first clamping arms 331 are arranged in sequence along the first direction, and the pair of first clamping arms 331 are respectively located on both sides of the cavity opening 345; the first adjusting portion 332 is connected to the pair of first clamping arms 331, and the first adjusting portion 332 can adjust the distance between the pair of first clamping arms 331 in the first direction; wherein, the first clamping arm 331 constitutes a first positioning end.

In this embodiment, a structure of a first positioning member 330 is provided. The first positioning member 330 realizes stable clamping of the plate 100 through a pair of first clamping arms 331. The pair of first clamping arms 331 are arranged along a first direction to ensure that uniform pressure can be applied from both sides of the plate 100 to be bent, thereby maintaining the stability and accuracy of the plate 100 during the bending process. The first clamping arms 331 directly contact the plate 100 to form a first positioning end, thereby ensuring accurate positioning of the plate 100.

Secondly, the first adjustment part 332 is a key component connected to the first clamping arm 331 and plays an important role in adjusting the distance. Through this design, the user can adjust the distance between the first clamping arms 331 according to actual needs, so as to adapt to plates 100 of different widths. This adjustment capability greatly enhances the versatility and adaptability of the device, reduces the frequency of replacing the positioning parts due to changes in the size of the plate 100, and improves production efficiency.

In addition, the combined design of the first clamping arm 331 and the first adjusting part 332 not only ensures the ease of operation, but also reflects the compactness and integration of the device structure. This design reduces the complexity of the device, so that the plate 100 can be quickly adjusted and fixed in actual operation, ensuring the continuity and efficiency of the bending process. It can be seen that the coordinated work of the first clamping arm 331 and the first adjusting part 332 ensures the precise positioning and stable clamping of plates 100 of different sizes, providing important technical support for achieving efficient and high-precision bending processing.

Exemplarily, the first adjustment portion 332 includes a pair of first linear motion modules, which are respectively connected to a pair of first clamping arms 331 , so that the distance between the pair of first clamping arms 331 in the first direction can be adjusted by controlling the pair of first linear motion modules.

Exemplarily, the first linear motion module is a screw type linear module, a linear motor type linear module, a gear rack type linear module, a cylinder drive type linear module, etc., which are not specifically limited here.

Of course, in order to prevent the first linear movable module from occupying the space of the first bearing end 341, a first long groove 342 extending along the first direction can be opened in the first bearing end 341, and the lower end of the first clamping arm 331 is passed through the first long groove 342, and the first linear movable module is arranged below the first bearing end 341, and then the lower end of the first clamping arm 331 is connected to the first linear movable module.

As shown in Figure 4, in some embodiments, the second positioning member 350 includes a pair of second clamping arms 352 and a second adjustment portion 351, the pair of second clamping arms 352 are arranged in sequence along the second direction, and the pair of second clamping arms 352 are respectively located on both sides of the cavity opening 345; the second adjustment portion 351 is connected to the pair of second clamping arms 352, and the second adjustment portion 351 can adjust the distance between the pair of second clamping arms 352 in the second direction; wherein, the second clamping arms 352 constitute a second positioning end.

In this embodiment, a structure of a second positioning member 350 is provided. The second positioning member 350 realizes stable clamping of the plate 100 through a pair of second clamping arms 352. The pair of second clamping arms 352 are arranged along the second direction to ensure that uniform pressure can be applied from both sides of the plate 100 to be bent, so as to maintain the stability and accuracy of the plate 100 during the bending process. Among them, the second clamping arms 352 directly contact the plate 100 to form a second positioning end, thereby ensuring the accurate positioning of the plate 100.

Secondly, the second adjustment part 351, as a key component, is connected to the second clamping arm 352 and plays an important role in adjusting the distance. Through this design, the user can adjust the distance between the second clamping arms 352 according to actual needs, so as to adapt to plates 100 of different widths. This adjustment capability greatly enhances the versatility and adaptability of the device, reduces the frequency of replacing the positioning member due to changes in the size of the plate 100, and improves production efficiency.

In addition, the combined design of the second clamping arm 352 and the second adjusting part 351 not only ensures the ease of operation, but also reflects the compactness and integration of the device structure. This design reduces the complexity of the device, so that the plate 100 can be quickly adjusted and fixed in actual operation, ensuring the continuity and efficiency of the bending process. It can be seen that the coordinated work of the second clamping arm 352 and the second adjusting part 351 ensures the precise positioning and stable clamping of plates 100 of different sizes, providing important technical support for achieving efficient and high-precision bending processing.

Exemplarily, the second adjustment portion 351 includes a pair of second linear motion modules, which are respectively connected to a pair of second clamping arms 352 , so that the distance between the pair of second clamping arms 352 in the second direction can be adjusted by controlling the pair of second linear motion modules.

Exemplarily, the second linear motion module is a screw type linear module, a linear motor type linear module, a gear rack type linear module, a cylinder drive type linear module, etc., which are not specifically limited here.

Of course, in order to prevent the second linear movable module from occupying the space of the first supporting end 341, a second long groove 343 extending along the second direction can be opened on the first supporting end 341, and the lower end of the second clamping arm 352 is passed through the second long groove 343, and the second linear movable module is arranged below the first supporting end 341, and then the lower end of the second clamping arm 352 is connected to the second linear movable module.

As shown in FIG. 4 , in some embodiments, the male mold includes two sub-molds and a third adjusting portion, and the gap between a pair of sub-molds forms a cavity 344; the third adjusting portion is connected to the pair of sub-molds, and the third adjusting portion can adjust the spacing between the pair of sub-molds in the first direction; wherein the first driving member 320 and the male mold are detachably connected.

In the present application, the male mold adopts a structure of two sub-molds, and the gap between them forms a cavity 344. This design allows the size of the cavity 344 to more accurately adapt to different bending requirements. At the same time, the third adjustment part allows the spacing between the two sub-molds in the first direction to be adjusted, which not only improves the adaptability of the mold, but also ensures the accuracy and consistency of each bend, which is particularly suitable for occasions that require highly customized bending dimensions; in other words, the bending device 300 provided in the present application can be adapted and improved with the upgrade of the battery shell to achieve the effect of cost reduction.

In addition, since the first positioning member 330 is composed of a pair of first clamping arms 331, they are arranged along the first direction on both sides of the cavity 345, directly contacting the two ends of the plate 100 to be bent, ensuring the stable positioning of the plate 100 during the bending process. The first adjustment portion 332 allows the distance between the pair of first clamping arms 331 to be adjusted, so as to adapt to plates 100 of different widths, and cooperates with the adjustable setting of the cavity 344 to improve the versatility and flexibility of the equipment.

Of course, since the cavity 344 can be adjusted, it is necessary to ensure that the core 310 can also be replaced, and then the core 310 of different sizes can be replaced to adapt to the cavity 344.

Exemplarily, there are multiple punches, and the multiple punches are divided into multiple types according to the size of the core 310 thereon, that is, the core 310 can be replaced according to the adjusted size of the cavity 344 to make the two fit together.

In other words, the cavity 344 is formed by the gap between the two sub-molds, and the third adjustment part is introduced to adjust the spacing of the pair of sub-molds in the first direction. Such a design allows the user to accurately adjust the size of the cavity 344 according to actual needs. This adjustment mechanism is essential for processing plates 100 of different thicknesses or requiring specific bending angles, ensuring bending accuracy and product quality. In addition, the number of punches is not only multiple, but also divided into multiple types according to the size and shape of the core 310 carried by each, which means that the device can support a variety of different bending configurations, and the user can quickly replace the punches of different cores 310 as needed to match the adjusted size of the cavity 344. This design greatly expands the processing range and flexibility of the equipment and is suitable for complex and changeable production tasks. Obviously, combined with the above two points, the design allows the operator to quickly respond to production needs of different batches or specifications without spending a lot of time reconfiguring or replacing the entire mold. By simply adjusting the sub-mold spacing and replacing the punch, new bending tasks can be quickly adapted, significantly improving production efficiency and response speed.

As shown in Figures 1 and 5, in some embodiments, the die 340 also includes a lifting portion 360 and a first driving portion 370, and the lifting portion 360 is located in the cavity 344; the first driving portion 370 is connected to the lifting portion 360, and the first driving portion 370 can drive the lifting portion 360 to move from one end of the cavity 344 away from the cavity opening 345 to the cavity opening 345.

In this embodiment, the lifting portion 360 is located inside the cavity 344. The function of the lifting portion 360 is to assist in controlling the pressing and positioning of the sheet 100 during the bending process or may participate in the initial forming of the sheet 100, which helps to improve the bending accuracy and efficiency, especially for workpieces that require internal support or complex forming.

Secondly, the linkage between the first driving part 370 and the lifting part 360: The connection between the first driving part 370 and the lifting part 360 enables the lifting part 360 to move along the inside of the cavity 344 according to the control requirements, from the end away from the cavity opening 345 to the position close to the cavity opening 345. This design can not only achieve fine control of the sheet 100, such as providing necessary support force or assisting the positioning of the sheet 100 during the bending process, but also participate in completing specific forming actions, such as when local indentation or pre-bending is required.

In addition, after the bending action of the plate 100 is completed, the first driving part 370 is used to drive the lifting part 360 to move so as to push the U-shaped semi-finished shell 400 out of the cavity 344 for easy subsequent removal and placement.

For example, during the bending process of the plate 100 , the lifting portion 360 and the core 310 can be kept in cooperation with each other to clamp the plate 100 , thereby preventing the bottom of the formed U-shaped semi-finished shell 400 from bending and deforming.

Exemplarily, the first driving part 370 is an electric push rod; of course, in other embodiments, the first driving part 370 may also be a pneumatic cylinder, a hydraulic cylinder, etc.

For example, the lifting portion 360 may be provided with a plate-like structure to increase the contact area with the plate 100 .

As shown in FIG. 5 , in some embodiments, the die 340 further includes a grabbing portion 362 , which is connected to the lifting portion 360 , and the grabbing portion 362 can grab a portion of the bent sheet 100 that is close to the lifting portion 360 .

In this embodiment, the grasping portion 362 can grasp the U-shaped semi-finished shell 400 to prevent the U-shaped semi-finished shell 400 from moving with the punch, so that the punch and the U-shaped semi-finished shell 400 can be separated when the punch moves out of the cavity 344.

That is to say, the gripping portion 362 is connected to the lifting portion 360 and can grip the bent sheet 100, especially the semi-finished product that has been formed into a U shape. The purpose of this design is to ensure the stability of the U-shaped semi-finished shell 400 in the subsequent stages of the bending operation, and to prevent the semi-finished product from being deformed or shifted due to the elastic recovery of the sheet 100 or other external forces during the process of the punch exiting the cavity 344. Of course, through the instant gripping action of the gripping portion 362, the U-shaped semi-finished shell 400 can be immediately and firmly fixed at the same time as the punch exits, avoiding additional manual operations or the intervention of complex mechanical devices to reposition or remove the semi-finished product, thereby speeding up the flow speed of the entire bending process and improving production efficiency.

It should be noted that this design enhances the adaptability of the bending device 300 to workpieces of different types and sizes, especially for materials that are easy to rebound or require delicate processing. The addition of the gripping portion 362 enables the equipment to handle complex bending requirements more flexibly and reduce the degree of rebound of the U-shaped semi-finished shell 400.

As shown in FIG. 5 , in some embodiments, the grabbing portion 362 can absorb the portion of the bent plate 100 close to the lifting portion 360 .

In this embodiment, an implementation of the gripping portion 362 is provided, that is, the gripping method between the gripping portion 362 and the plate 100 can be set to adsorption.

For example, a plurality of negative pressure suction ports are provided at one end of the lifting portion 360 contacting the plate 100 , so that the U-shaped semi-finished shell 400 can be grasped by negative pressure adsorption.

An elastic pad may be provided at one end of the lifting portion 360 contacting the plate 100 , and the negative pressure suction port passes through the elastic pad to ensure the suction strength of the negative pressure suction port on the plate 100 .

As shown in FIG. 2 and FIG. 5 , in some embodiments, the lifting portion 360 has a second bearing end 361 , which can abut against the plate 100 and is configured as a planar structure; wherein the working surface of the core 310 and the second bearing end 361 are configured in parallel.

The second bearing end 361 of the lifting part 360 is designed as a planar structure and can directly abut against the plate 100, providing a stable support platform for the plate 100 during the bending process. Such a planar design helps to evenly disperse the force on the plate 100, reduce local stress concentration, and avoid deformation or damage to the plate 100, which is particularly important for thin plates or plates 100 that require precision processing.

Furthermore, the working surface of the core 310 is arranged parallel to the second bearing end 361, ensuring that the sheet 100 can be deformed along a precise predetermined trajectory during the bending operation, thereby avoiding inaccurate bending angles or shape distortions caused by angle deviations. This parallel design is particularly critical for manufacturing parts with strict size and shape requirements.

Obviously, in terms of optimizing the process flow: the second bearing end 361 of the lifting part 360 directly supports the sheet 100, which simplifies the positioning steps before bending and improves production efficiency. That is, after the sheet 100 is positioned by the first positioning member 330, before starting the bending, the lifting part 360 is lifted until the second bearing end 361 is flush with the first bearing end 341, and then the punch is controlled to descend to cooperate with the lifting part to clamp the sheet 100, and after the punch contacts the sheet 100, it continues to descend to bend, thereby reducing the degree of displacement of the sheet 100 and improving the bending accuracy.

In some embodiments, the core 310 is arranged in an "eight" shape on both sides of the first direction, so that the core 310 has a large end and a small end that are relatively arranged, and the large end is close to the cavity opening 345 .

That is, both sides of the core 310 in the first direction are provided with inclined surfaces, and the core 310 is formed into an eight-shaped shape on both sides in the first direction, so that the core 310 has a large end and a small end. Obviously, by arranging the large end at one end of the core 310 close to the cavity 345, the rebound degree of the U-shaped semi-finished shell 400 formed by bending the plate 100 can be reduced.

For example, the male mold and the female mold 340 are arranged in sequence in the vertical direction, and the male mold is located above the female mold 340, so that the large end of the core 310 is located at the bottom and the small end is located at the top.

For example, the height W1 of the core 310 is not less than one-third of the width W2 of the battery shell, and this size is conducive to the sheet 100 rebounding outward after the U-shaped bend.

For example, in order to prevent the sheet 100 from rebounding after bending, the core 310 can also be made into an isosceles trapezoidal shape, with the angle between the bottom and the waist being r, and satisfying: 80°≤r≤90°. In this embodiment, the angle between the bottom and the waist is set to 80°. Of course, in other embodiments, the angle between the bottom and the waist can also be set to 82°, 84°, 86°, 87°, 89°, 90°, etc.

In some embodiments, the present application also provides a production line, which includes a scoring device 200, a bending device 300, a joint device 500 and a welding device. The scoring device 200 is used to score the plate 100 to be bent so as to form a bending line 110 on the surface of the plate 100 to be bent; the bending device 300 is a bending device 300 as in any one of the above embodiments, and the bending device 300 is used to bend the end of the plate 100 after scoring once so that the plate 100 forms a U-shaped semi-finished shell 400; the joint device 500 is used to bend the end of the U-shaped semi-finished shell 400 for a second time so that the end of the U-shaped semi-finished shell 400 can be closed and form a weld 410; the welding device is used for welding the weld 410 to obtain a finished shell 900.

It is easy to understand that the scoring device 200: as the first step of the production line, the scoring device 200 accurately scores the bending line 110 on the surface of the plate 100 to be bent. This step is crucial because the pre-scoring can guide the material to accurately form along the predetermined trajectory during bending, reduce cracks and deformation during the bending process, and improve the precision and appearance quality of the finished product. Bending device 300: using the precision bending device 300 described above, the plate 100 after the scoring is accurately bent once to form a U-shaped semi-finished shell 400. The exquisite design of the bending device 300, such as the adjustable positioning member and the lifting part 360, ensures the efficiency and accuracy of the bending process, and can quickly and stably produce a U-shaped structure that meets the requirements. Seam closing device 500: The seam closing device 500 performs a secondary bending process on the end of the U-shaped semi-finished product so that the two ends can be accurately closed to form a continuous weld 410 preparation area. This step lays a good foundation for subsequent welding and ensures the fit and sealing of the shell edge. Welding device: The welding device welds the closed weld 410, and completes the closure of the shell through a suitable welding technology (such as laser welding, arc welding, etc.) to form a finished shell 900. Quality control during the welding process is crucial to ensure the strength and sealing of the finished product.

Since the above-mentioned bending device 300 has the above-mentioned technical effects, the production line including the bending device 300 should have the same technical effects, which will not be described in detail here.

As shown in Figures 7 and 8, in some embodiments, the engraving device 200 includes a first positioning platform 240, a third positioning member 220 and a fourth positioning member 210, the first positioning platform 240 has a third bearing end 241, and the third bearing end 241 is used to bear the plate 100 to be bent; the third positioning member 220 has a pair of third positioning ends; the pair of third positioning ends are used to respectively abut against the two ends of the plate 100 to be bent located at the third bearing end 241 in the third direction, and the third direction is parallel to the third bearing end 241; wherein, the distance between the pair of third positioning ends in the third direction can be adjusted; the fourth positioning member 210 has a pair of fourth positioning ends; the pair of fourth positioning ends are used to respectively abut against the two ends of the plate 100 to be bent located at the third bearing end 241 in the fourth direction, and the fourth direction is parallel to the third bearing end 241, and the fourth direction and the third direction are perpendicular to each other; wherein, the distance between the pair of fourth positioning ends in the fourth direction can be adjusted.

In this embodiment, the first positioning platform 240 is used to carry the plate 100 to be bent, and a third bearing end 241 is provided thereon, which is specifically used to stably support the plate 100 to ensure accurate positioning during the processing. The third positioning member 220 has a pair of third positioning ends, which are in contact with the two ends of the plate 100 to be bent in the third direction (assuming it is horizontal) through a pair of third positioning ends. This pair of positioning ends can adjust the distance between each other according to the actual width of the plate 100, so as to adapt to plates 100 of different sizes and ensure the accuracy of the position of the engraved lines. The fourth positioning member 210 is arranged vertically with the third positioning member 220, and is also equipped with a pair of fourth positioning ends, which are in contact with the two ends of the plate 100 in the fourth direction (assuming it is longitudinal). Like the third positioning member 220, the distance between the fourth positioning members 210 is also adjustable, ensuring that accurate alignment and fixation can be achieved regardless of how the length of the plate 100 changes.

For example, after adjusting the positions of the third positioning member 220 and the fourth positioning member 210, the lines can be manually engraved. Alternatively, in other embodiments, the lines can also be engraved by a mechanical arm.

For example, the third direction may be set parallel to the first direction, and the fourth direction may be set parallel to the second direction. Optionally, in actual operation, the third positioning member 220 is used to limit the length direction of the plate 100, and the fourth positioning member 210 is used to limit the width direction of the plate 100.

Then, the bending line 110 is engraved on the plate 100 according to the product design size. The engraving device 200 is similar to the glass cutter engraving principle. According to the material properties and thickness of the plate 100, a line mark with microscopic depth and width is formed on the plate 100. In this embodiment, the width of the line mark is no greater than 0.2 mm, and the depth is no greater than 0.2 mm. Of course, in other embodiments, the width and depth of the line mark can also be set to other sizes, which are not specifically limited here.

As shown in FIGS. 7 and 8 , in some embodiments, the third positioning member 220 includes a pair of third clamping arms 221 and a fourth adjusting portion 222, wherein the pair of third clamping arms 221 are sequentially arranged along the third direction; the fourth adjusting portion 222 is connected to the pair of third clamping arms 221, and the fourth adjusting portion 222 can adjust the distance between the pair of third clamping arms 221 in the third direction; wherein the third clamping arms 221 constitute a third positioning end;

In this embodiment, a structure of a third positioning member 220 is provided. The third positioning member 220 realizes stable clamping of the plate 100 through a pair of third clamping arms 221. The pair of third clamping arms 221 are arranged along the third direction to ensure that uniform pressure can be applied from both sides of the plate 100 to be engraved, so as to maintain the stability and accuracy of the plate 100 during the engraving process. Among them, the third clamping arm 221 directly contacts the plate 100 to form a third positioning end, which ensures the accurate positioning of the plate 100.

Secondly, the fourth adjustment part 222, as a key component, is connected to the third clamping arm 221 and plays an important role in adjusting the distance. Through this design, the user can adjust the distance between the third clamping arms 221 according to actual needs, so as to adapt to plates 100 of different widths. This adjustment capability greatly enhances the versatility and adaptability of the device, reduces the frequency of replacing the positioning member due to changes in the size of the plate 100, and improves production efficiency.

In addition, the combined design of the third clamping arm 221 and the fourth adjusting portion 222 not only ensures the ease of operation, but also reflects the compactness and integration of the device structure. This design reduces the complexity of the device, so that the plate 100 can be quickly adjusted and fixed in actual operation, ensuring the continuity and efficiency of the marking process. It can be seen that the coordinated work of the third clamping arm 221 and the fourth adjusting portion 222 ensures the precise positioning and stable clamping of plates 100 of different sizes.

Exemplarily, the fourth adjustment portion 222 includes a pair of third linear motion modules, which are respectively connected to a pair of third clamping arms 221 , so that the distance between the pair of third clamping arms 221 in the third direction can be adjusted by controlling the pair of third linear motion modules.

Exemplarily, the third linear motion module is a screw type linear module, a linear motor type linear module, a gear rack type linear module, a cylinder drive type linear module, etc., which is not specifically limited here.

Of course, in order to prevent the third linear movable module from occupying the space of the third supporting end 241, a third long groove extending along the third direction can be opened in the third supporting end 241, and the lower end of the third clamping arm 221 is passed through the third long groove, and the third linear movable module is arranged below the third supporting end 241, and then the lower end of the third clamping arm 221 is connected to the third linear movable module.

As shown in Figures 7 and 8, in some embodiments, the fourth positioning member 210 includes a pair of fourth clamping arms 211 and a fifth adjustment portion 212, and the pair of fourth clamping arms 211 are arranged in sequence along the fourth direction; the fifth adjustment portion 212 is connected to the pair of fourth clamping arms 211, and the fifth adjustment portion 212 can adjust the distance between the pair of fourth clamping arms 211 in the fourth direction; wherein the fourth clamping arm 211 constitutes a fourth positioning end.

In this embodiment, a structure of a fourth positioning member 210 is provided. The fourth positioning member 210 realizes stable clamping of the plate 100 through a pair of fourth clamping arms 211. The pair of fourth clamping arms 211 are arranged along the fourth direction to ensure that uniform pressure can be applied from both sides of the plate 100 to be engraved, so as to maintain the stability and accuracy of the plate 100 during the engraving process. Among them, the fourth clamping arm 211 directly contacts the plate 100 to form a fourth positioning end, which ensures the accurate positioning of the plate 100.

Secondly, the fifth adjustment portion 212 is connected to the fourth clamping arm 211, and plays an important role in adjusting the distance. Through this design, the user can adjust the distance between the fourth clamping arms 211 according to actual needs, so as to adapt to plates 100 of different widths. This adjustment capability greatly enhances the versatility and adaptability of the device, reduces the frequency of replacing the positioning member due to changes in the size of the plate 100, and improves production efficiency.

In addition, the combined design of the fourth clamping arm 211 and the fifth adjusting portion 212 not only ensures the ease of operation, but also reflects the compactness and integration of the device structure. This design reduces the complexity of the device, so that the plate 100 can be quickly adjusted and fixed in actual operation, ensuring the continuity and efficiency of the marking process. It can be seen that the coordinated work of the fourth clamping arm 211 and the fifth adjusting portion 212 ensures the precise positioning and stable clamping of plates 100 of different sizes.

Exemplarily, the fifth adjustment portion 212 includes a pair of fourth linear motion modules, which are respectively connected to a pair of fourth clamping arms 211 , so that the distance between the pair of fourth clamping arms 211 in the fourth direction can be adjusted by controlling the pair of fourth linear motion modules.

Exemplarily, the fourth linear motion module is a screw type linear module, a linear motor type linear module, a gear rack type linear module, a cylinder drive type linear module, etc., which is not specifically limited here.

Of course, in order to prevent the fourth linear motion module from occupying the space of the third supporting end 241, a fourth long groove extending along the fourth direction can be opened in the third supporting end 241, and the lower end of the fourth clamping arm 211 is passed through the fourth long groove, and the fourth linear motion module is arranged below the third supporting end 241, and then the lower end of the fourth clamping arm 211 is connected to the fourth linear motion module.

As shown in FIG. 7 , in some embodiments, the third supporting end 241 is provided with a first negative pressure adsorption port 230 .

In this embodiment, a first negative pressure adsorption port 230 is provided on the third supporting end 241, and then when processing the product of the present application, the plate 100 is sucked and placed on the third supporting end 241, and the first positioning member 330 and the second positioning member 350 are adjusted to limit the plate 100 and then the first negative pressure adsorption port 230 is activated to fix the plate 100 on the platform.

Of course, if the plate 100 is made of a magnetic material, a magnet may also be disposed on the third supporting end 241 to fix the plate 100 by magnetic attraction.

As shown in FIGS. 9 and 10 , in some embodiments, the jointing device 500 includes a second positioning platform 520, a clamping member 510, a mold core 540, a pair of extrusion members 530, and a second driving member. The second positioning platform 520 has a fourth load-bearing end 521, and the fourth load-bearing end 521 has a placement area, which is used to carry the U-shaped semi-finished shell 400; the clamping member 510 is connected to the second positioning platform 520, and the clamping member 510 is used to clamp the U-shaped semi-finished shell 400 located in the placement area; the mold core 540 is placed in the U-shaped The inner cavity of the semi-finished shell 400; the outer shape of the mold core 540 matches the inner contour of the finished shell 900; a pair of extrusions 530 are located on opposite sides of the placement area; the second driving member is connected to the pair of extrusions 530, and the second driving member can drive the pair of extrusions 530 to move closer to or away from each other in the fifth direction, and the fifth direction is parallel to the fourth bearing end 521, so that the extrusion 530 can push the corresponding U-shaped end of the semi-finished shell 400 to bend to abut against the end of the mold core 540 away from the fourth bearing end 521.

In this embodiment, the second positioning platform 520 serves as a basis for supporting the U-shaped semi-finished shell 400, and the placement area of the fourth supporting end 521 ensures stable positioning of the shell during the processing, providing a stable support for the subsequent seaming operation.

The clamping member 510 is connected to the second positioning platform 520 and is responsible for firmly clamping the U-shaped semi-finished shell 400 to prevent displacement of the shell during the extrusion molding process, thereby ensuring the accuracy and stability of the processing.

The mold core 540 is placed in the inner cavity of the U-shaped semi-finished shell 400. Its outer shape design matches the inner contour of the finished shell 900, and plays a precise molding guide role, ensuring that the inner size and shape of the shell meet the design requirements after the seams are closed.

A pair of extrusions 530 are located on opposite sides of the placement area, and are controlled by the second drive member to move in coordination in a fifth direction, which is parallel to the load-bearing end. This design enables the extrusions 530 to apply balanced and controllable pressure to both ends of the U-shaped shell, achieving precise secondary bending, and causing the two ends to move closer to the mold core 540 and eventually close. The second drive member, as the power source of the extrusions 530, adjusts the relative positions of the extrusions 530 through a precise control mechanism, so that they can move closer to or away from the center at a synchronized and adjustable speed and force, thereby accurately controlling the seam joining process and ensuring the tightness of the weld 410 and the molding quality of the shell.

Exemplarily, the length of the mold core 540 is set to be equal to the length of the finished shell 900, so that in the subsequent air-tightness test, the mold core 540 can be placed in the finished shell 900 to reduce the consumption of gas used in the air-tightness test.

Exemplarily, the second driving member is an electric push rod; of course, in other embodiments, the second driving member may also be a hydraulic cylinder, a pneumatic cylinder, etc.

For example, the mold core 540 is formed by mold steel to ensure the hardness and service life required by production, and its surface is required to be smooth, free of burrs and scratches, and wear-resistant. The mold core 540 is designed with chamfers that match the products to be produced.

Exemplarily, the extrusion 530 has a front end and a bottom end, the front end is an end of the extrusion 530 facing the U-shaped semi-finished shell 400, the bottom end is an end facing the first load-bearing end 341, the bottom end is set as a plane structure and parallel to the first load-bearing end 341, and the front end is set as a plane structure parallel to the second direction. Optionally, after the secondary bending, the bent portion of the end of the U-shaped semi-finished shell 400 is clamped between the bottom end and the mold core 540.

Exemplarily, a chamfer is provided at the junction of the front end and the bottom end to avoid scratching the U-shaped semi-finished shell 400. Optionally, the extrusion piece 530 is provided in a right-angle trapezoid.

During operation, the extruder 530 is started after the U-shaped semi-finished shell 400 and the mold core 540 are positioned, and the sheet 100 is pushed toward the middle from both sides of the U-shaped semi-finished shell 400 along the chamfers and upper plane of the mold core 540 to complete the final bending and forming of the battery shell.

As shown in Figure 10, in some embodiments, the clamping member 510 includes a pair of fifth clamping arms 511 and a second driving portion 512, and the pair of fifth clamping arms 511 are respectively located on both sides of the placement area; the second driving portion 512 is connected to the pair of fifth clamping arms 511, and the second driving portion can drive the pair of fifth clamping arms 511 to move closer to or away from each other.

Exemplarily, the fifth clamping arm 511 is configured to extend along the length direction of the finished shell 900 , and the length of the fifth clamping arm 511 is greater than the length of the finished shell 900 , thereby reducing the rebound of the U-shaped semi-finished shell 400 and affecting the bending effect.

Exemplarily, the second driving part 512 may be an electric push rod; of course, a pneumatic cylinder, a hydraulic cylinder, etc. may also be used.

In one of the embodiments of the second aspect, the welding device includes a welding head 600 and a third driving member, the welding head 600 is facing the weld 410; the third driving member is installed on the second positioning platform 520, and the third driving member is connected to the welding head 600, and the third driving member can drive the welding head 600 to move along the weld 410.

Obviously, after the U-shaped semi-finished shell 400 is bent by the joint device 500, the clamping member 510 is kept clamping the U-shaped semi-finished shell 400, and the extrusion member 530 presses down the bent part of the U-shaped semi-finished shell 400, and then the welding head 600 is driven by the third driving member to move along the weld 410 to weld the weld 410, and a finished shell 900 is formed after the welding is completed.

For example, the welding head 600 may adopt laser welding or argon arc welding, which is not specifically limited here.

Exemplarily, the third driving member is the fifth linear motion module, and the fifth linear motion module is a screw type linear module, a linear motor type linear module, a gear rack type linear module, a cylinder driven linear module, etc., which is not specifically limited here.

As shown in FIG. 11 and FIG. 12 , in some embodiments, the mold core 540 has a heat dissipation cavity 542 , and the heat dissipation cavity 542 has an air inlet 541 and an air outlet 543 , and the air outlet 543 faces the weld 410 .

During the welding process, especially for high energy density welding methods (such as laser welding, electron beam welding, etc.), a large amount of heat is generated. The heat dissipation cavity 542 in the core 540 introduces cold air or cooling medium through the air inlet 541 and guides it to the vicinity of the weld 410 through the air outlet 543, which can effectively take away the heat in the welding area, prevent material deformation caused by overheating, quality problems of the weld 410, or affect the performance and life of the welding equipment.

Heat dissipation measures can control the temperature of the welding area, avoid changes in the metal microstructure caused by local overheating, and reduce the heat-affected zone around the weld 410, thereby improving the mechanical properties and durability of the welded joint and ensuring the welding quality.

The mold core 540 is a precision component that directly contacts the high-temperature weld 410. If there is no effective heat dissipation measure, its material may degrade in performance or even be damaged due to long-term heat exposure. The design of the heat dissipation cavity 542 protects the mold core 540, prolongs its service life, and reduces maintenance costs.

As shown in Figure 13, in some embodiments, the production line also includes an airtightness detection device, which includes a pair of plugs 700, and the two ends of the finished shell 900 respectively have openings, and the pair of plugs 700 are installed at the two ends of the finished shell 900 to close the finished shell 900; wherein, the core 540 is located in the finished shell 900, and one of the pair of plugs 700 has an inflation hole 710, the inflation hole 710 is connected to the air inlet 541, and the core 540 is provided with a clearance groove on the side facing the weld 410, the clearance groove is extended along the extension direction of the weld 410, and the clearance groove is connected to the air outlet 543.

After welding, a pair of plugs 700 are installed at the two end openings of the finished housing 900 to seal the housing and prepare for airtightness testing. This design ensures the airtightness of the test environment and prevents external factors from interfering with the test results.

One of the plugs 700 is specially provided with an air filling hole 710, which is connected to the air inlet 541 inside the mold core 540. Through the air filling hole 710, gas with a certain pressure can be injected into the shell to provide the necessary test medium for air tightness detection.

In addition, the design of the mold core 540 includes a relief groove arranged along the extension direction of the weld 410, and the relief groove is connected to the gas outlet 543 inside the shell. When the gas is injected into the shell and passes through the relief groove, this design not only avoids the detection error that may be caused by the gas directly impacting the weld 410, but also ensures that the gas can be discharged smoothly, which is convenient for the stable control of the pressure and the uniform distribution of the gas during the detection process. In addition, the weld 410 is located within the notch range of the relief groove 544.

It is easy to understand that after the gas is injected into the shell through the gas filling hole 710, the pressure change inside the shell is monitored. If the shell is well sealed, the internal pressure will remain stable, otherwise it indicates that there is a leak. In this way, the airtightness of the finished shell 900 can be quickly and accurately evaluated to ensure that each shell meets the predetermined quality standards.

Exemplarily, the plug 700 is provided with a plate-like structure and is installed at the opening of the finished shell 900 in cooperation with a sealing gasket to achieve sealing.

Optionally, the plug 700 and the core mold 540 are connected by bolts, so that the plug 700 can be fixed to the finished shell 900 without contacting the external structure.

Of course, in other embodiments, the plug 700 can also be set on the power member. When the finished shell to be inspected is placed in the inspection position, the power member drives the plug to the opening of the finished shell 900, thereby clamping and closing the opening of the finished shell 900. This is equivalent to replacing the plug connected to the mold core 540 by bolts.

As shown in Figures 14 and 15, in some embodiments, the production line also includes a cleaning device 800, which includes a support member 810, a cleaning flywheel 830, a suction member 820 and a fourth driving member. The cleaning flywheel 830 is rotatably connected to the support member 810, the fourth driving member is connected to the cleaning flywheel 830, the fourth driving member can drive the cleaning flywheel 830 to rotate, and the suction member 820 is connected to the support member 810, the suction member 820 can suck dust at the cleaning flywheel 830; wherein the support member 810 has an insertion end 811, the insertion end 811 can be inserted into the inner cavity of the finished product shell 900, and the flywheel 830 is located at the insertion end 811.

The cleaning device 800 integrated in the production line further improves the post-processing stage of the production process and ensures the cleanliness of the inner cavity of the finished shell 900. Its design and working principle are as follows:

1. The support member 810 is designed with an insertion end 811, the shape and size of which can be inserted into the inner cavity of the finished housing 900 to reach the area that needs to be cleaned. Such a design ensures the pertinence and effectiveness of the cleaning process and avoids unnecessary damage to the housing.

2. Cleaning The flywheel 830 is mounted on the support member 810 through a rotating connection and is driven to rotate by the fourth driving member. The flywheel 830 may be equipped with bristles, scrapers or other cleaning elements. With the high-speed rotation of the flywheel 830, the residues on the surface of the inner cavity of the shell, such as welding slag, dust, etc., can be effectively removed to ensure the cleanliness of the inner cavity.

3. The suction member 820 is connected to the support member 810. When the suction function is activated, the dust and debris generated by the flywheel 830 during operation can be sucked and cleaned in time to prevent these impurities from being re-dispersed into the housing or the working environment. This instant suction design helps to keep the working environment clean and improves the cleaning efficiency and quality.

4. The fourth drive member serves as the power source for cleaning the flywheel 830. The fourth drive member ensures that the flywheel 830 can rotate stably and efficiently. Its speed and torque can be adjusted according to the cleaning requirements to adapt to the cleaning of the inner cavity of the shell with different materials and pollution degrees.

Exemplarily, the support member 810 includes a base and a cantilever, one end of the cantilever is fixed to the base, and the other end constitutes an insertion end 811.

Exemplarily, the fourth driving member is a driving motor.

Exemplarily, the suction member includes a suction head, which is mounted on the insertion end, and an opening of the suction head faces the flywheel.

In some embodiments, the production line also includes a robotic arm and a negative pressure suction cup, the end of the robotic arm is connected to the negative pressure suction cup, and the robotic arm can drive the negative pressure suction cup to move within a preset range; wherein, the engraving device 200, the bending device 300, the seaming device 500 and the welding device are all located within the preset range.

The negative pressure suction cup equipped with the robot arm can absorb and transport the sheet 100 or the semi-finished shell 900 by negative pressure (vacuum), without manual intervention, reducing labor intensity and improving production efficiency and safety. This method is particularly suitable for handling large-sized and weight-varying metal sheets 100, ensuring the stability and accuracy of the handling process.

The range of motion of the robotic arm is set to cover the scoring device 200, the bending device 300, the seaming device 500 and the welding device, which means that it can automatically transfer the plate 100 to be processed from one workstation to the next, with full automation, reducing the conversion time between processes and improving the continuity and smoothness of the production line; and the precise control capability of the robotic arm ensures the accurate placement of the plate 100 in each processing link, especially in the scoring and welding steps that require a high degree of positioning accuracy. The robotic arm can accurately position the plate 100 or semi-finished product in the correct position of the processing device according to a preset program, reducing human errors and improving the consistency and quality of the finished product.

Obviously, through programming, the robot arm can adapt to the processing of plates 100 of different sizes and shapes, as well as the needs of different production processes, which improves the flexibility and adaptability of the production line and can be quickly adjusted to meet the needs of customization or mass production.

In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the idea of the present invention, some simple deductions, modifications or substitutions can be made.

Claims (20)

1. Bending device, its characterized in that, bending device includes:

a male mold having a core;

The die comprises a die cavity and a first bearing end, wherein an orifice of the die cavity is positioned at the first bearing end, and the first bearing end is used for bearing a plate to be bent;

a first drive member coupled to the punch, the first drive member being capable of driving movement of the punch, the path of movement of the punch being configured to enable the core to enter and exit the cavity from the cavity opening;

The first positioning piece is provided with a pair of first positioning ends, the first positioning ends are respectively positioned at two sides of the cavity opening, and the first positioning ends are respectively abutted with two ends of the plate to be bent positioned at the first bearing end in the first direction; the distance between the pair of first positioning ends in the first direction can be adjusted, and the first direction is parallel to the first bearing end.

2. The bending device of claim 1, wherein the bending device further comprises:

the second positioning piece is provided with a pair of second positioning ends which are respectively positioned at two sides of the cavity opening; the pair of second positioning ends are used for respectively abutting against two ends of the plate to be bent, which is positioned at the first bearing end, in the second direction, the distance between the pair of second positioning ends in the second direction can be adjusted, the second direction is parallel to the first bearing end, and the second direction is perpendicular to the first direction.

3. The bending device of claim 2, wherein the first positioning member comprises:

The pair of first clamping arms are sequentially arranged along the first direction, and are respectively positioned at two sides of the cavity opening;

A first adjusting portion connected to the pair of first clamp arms, the first adjusting portion being capable of adjusting a distance between the pair of first clamp arms in the first direction; wherein the first clamping arm forms the first positioning end;

And/or, the second positioning piece comprises:

the pair of second clamping arms are sequentially arranged along the second direction, and the pair of second clamping arms are respectively positioned at two sides of the cavity opening;

a second adjusting portion connected to the pair of second clamp arms, the second adjusting portion being capable of adjusting a distance between the pair of second clamp arms in the second direction; wherein the second clamping arm forms the second positioning end.

4. Bending device according to claim 1, wherein the male die comprises:

Two sub-molds, wherein a gap between a pair of the sub-molds forms the cavity;

a third adjusting portion connected to the pair of sub-molds, the third adjusting portion being capable of adjusting a distance between the pair of sub-molds in the first direction;

Wherein the first driving piece is detachably connected with the male die.

5. The bending device of claim 1, wherein the die further comprises:

The jacking part is positioned in the cavity;

the first driving part is connected with the jacking part and can drive the jacking part to move from one end, away from the cavity opening, of the cavity to the cavity opening.

6. The bending device of claim 5, wherein the die further comprises:

The grabbing part is connected with the jacking part, and the grabbing part can grab the part, close to the jacking part, of the bent plate.

7. The bending apparatus according to claim 6, wherein the gripping portion is capable of absorbing a portion of the bent sheet material adjacent to the jacking portion.

8. The bending device according to claim 5, wherein the jacking portion has a second bearing end, the second bearing end being capable of abutting against the sheet material, and the second bearing end being provided in a planar configuration; wherein the working face of the core and the second bearing end are arranged in parallel.

9. The bending apparatus according to claim 1, wherein the mandrel is splayed on both sides in the first direction such that the mandrel has oppositely disposed large and small ends, the large end being adjacent the mouth.

10. A production line, characterized in that it comprises:

the scribing device is used for scribing the board to be bent so as to form bending lines on the surface of the board to be bent;

Bending device according to any one of claims 1 to 7, for bending the end of the scored sheet material once, so that the sheet material forms a U-shaped semi-finished shell;

the seaming device is used for secondarily bending the end part of the U-shaped semi-finished shell so that the end part of the U-shaped semi-finished shell can be folded and a welding seam is formed;

and the welding device is used for welding the weld joint so as to obtain a finished shell.

11. The production line of claim 10, wherein the scoring device comprises:

The first positioning platform is provided with a third bearing end which is used for bearing the plate to be bent;

A third positioning member having a pair of third positioning ends; the pair of third positioning ends are used for respectively abutting against two ends of the plate to be bent, which are positioned at the third bearing end, in a third direction, and the third direction is parallel to the third bearing end; wherein a distance between a pair of the third positioning ends in the third direction is adjustable;

The fourth positioning piece is provided with a pair of fourth positioning ends; the pair of fourth positioning ends are used for respectively abutting against two ends of the plate to be bent, which is positioned at the third bearing end, in the fourth direction, the fourth direction is parallel to the third bearing end, and the fourth direction and the third direction are mutually perpendicular; wherein a distance between a pair of the fourth positioning ends in the fourth direction is adjustable.

12. The production line of claim 11, wherein the third positioning member comprises:

the pair of third clamping arms are sequentially arranged along the third direction;

a fourth adjusting portion connected to the pair of third clamp arms, the fourth adjusting portion being capable of adjusting a distance between the pair of third clamp arms in the third direction; wherein the third clamping arm forms the third positioning end;

And/or, the fourth positioning piece comprises:

a pair of fourth clamping arms, the pair of fourth clamping arms being arranged in sequence along the fourth direction;

a fifth adjusting portion connected to the pair of fourth clamp arms, the fifth adjusting portion being capable of adjusting a distance between the pair of fourth clamp arms in the fourth direction; wherein the fourth clamping arm forms the fourth positioning end.

13. The production line of claim 11, wherein the third bearing end is provided with first negative pressure adsorption ports.

14. The production line of claim 11, wherein the seaming assembly comprises:

The second positioning platform is provided with a fourth bearing end, and the fourth bearing end is provided with a placing area which is used for bearing the U-shaped semi-finished shell;

The clamping piece is connected with the second positioning platform and used for clamping the U-shaped semi-finished shell positioned in the placement area;

The mold core is arranged in the inner cavity of the U-shaped semi-finished shell; the shape of the mold core is matched with the internal contour of the finished shell;

a pair of extrusions positioned on two opposite sides of the placement area;

The second driving piece is connected with the pair of extrusion pieces, the second driving piece can drive the pair of extrusion pieces to be close to or far away from each other in a fifth direction, the fifth direction is parallel to the fourth bearing end, and the extrusion pieces can push the corresponding end parts of the U-shaped semi-finished shell to be bent to be abutted with the end, far away from the fourth bearing end, of the mold core.

15. The production line of claim 14, wherein the clamp comprises:

A pair of fifth clamping arms which are respectively positioned at two sides of the placement area;

And the second driving part is connected with the pair of fifth clamping arms and can drive the pair of fifth clamping arms to be close to or far from each other.

16. The production line of claim 14, wherein the welding device comprises:

A welding head, the welding head facing the weld;

The third driving piece is installed on the second positioning platform and connected with the welding head, and the third driving piece can drive the welding head to move along the welding seam.

17. The production line of claim 14, wherein the mold core has a heat dissipating channel having an air inlet and an air outlet, the air outlet being oriented toward the weld.

18. The production line according to claim 17, the production line is characterized by further comprising:

the air tightness detection device comprises a pair of plugs, wherein the two ends of the finished shell are respectively provided with an opening, and the pair of plugs are arranged at the two ends of the finished shell so as to seal the finished shell;

The mold core is positioned in the finished shell, one of the pair of plugs is provided with an air charging hole, the air charging hole is communicated with the air inlet, one side, facing the welding seam, of the mold core is provided with a yielding groove, the yielding groove extends along the extending direction of the welding seam, and the yielding groove is communicated with the air outlet.

19. The production line according to claim 11, the production line is characterized by further comprising:

The cleaning device comprises a supporting piece, a cleaning flywheel, a suction piece and a fourth driving piece, wherein the cleaning flywheel is rotationally connected with the supporting piece, the fourth driving piece is connected with the cleaning flywheel, the fourth driving piece can drive the cleaning flywheel to rotate, the suction piece is connected with the supporting piece, and the suction piece can suck dust at the cleaning flywheel;

the support piece is provided with an insertion end, the insertion end can be inserted into the inner cavity of the finished shell, and the flywheel is located at the insertion end.

20. The production line according to claim 19, the production line is characterized by further comprising:

the device comprises a mechanical arm and a negative pressure sucker, wherein the tail end of the mechanical arm is connected with the negative pressure sucker, and the mechanical arm can drive the negative pressure sucker to move in a preset range; the scribing device, the bending device, the joint closing device and the welding device are all located in the preset range.