Battery shell front and rear end subassembly share milling jig

Abstract

The utility model discloses a battery shell front and rear end subassembly share milling jig belongs to frock clamp technical field. Including: including jig bottom plate, and along its length direction set up a plurality of first top compact mechanism and a plurality of second top compact mechanism, both parallel and interval arrangement, two third top compact mechanism are symmetrically arranged on the jig bottom plate, another two fourth top compact mechanism are symmetrically arranged. When installing front end subassembly, the first top compact mechanism and the second top compact mechanism are fixed by common down pressure, when installing rear end subassembly, only the first top compact mechanism in the middle, and the third top compact mechanism and the fourth top compact mechanism participate in down pressure. Through structural layout optimization and selective enablement of compact mechanism, the clamping of one set of jig is compatible with front and rear end subassembly, the development and maintenance of multiple special jigs are avoided, the number of jigs is significantly reduced, the manufacturing, storage and management cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a common milling fixture for the front and rear sub-assemblies of a battery casing. Background Technology

[0002] With the rapid development of the new energy industry, power batteries, as core components of electric vehicles and energy storage systems, have attracted widespread attention for their manufacturing precision and production efficiency. In the processing of power battery casings, the front-end sub-assemblies and rear-end sub-assemblies, as key structural components, usually require high-precision milling to ensure assembly accuracy and structural strength. Such processing places stringent requirements on the positioning accuracy, clamping stability and repeatability of tooling fixtures.

[0003] Currently, in actual production, for the milling process of the front and rear sub-assemblies of the battery casing, separate dedicated fixtures are generally used for clamping and positioning. That is, the front sub-assembly uses one set of dedicated milling fixtures, while the rear sub-assembly is equipped with another set of fixtures.

[0004] While this "one workpiece, one fixture" model can meet basic processing needs, it also exposes many problems: First, the number of fixtures increases exponentially, leading to higher manufacturing costs and more complex warehousing management; second, frequent fixture changes prolong production line changeover time, affecting production cycle and equipment utilization. Utility Model Content

[0005] This utility model addresses the aforementioned problems in the existing technology by proposing a common milling fixture for the front and rear sub-assemblies of a battery casing.

[0006] This utility model can be achieved through the following technical solutions:

[0007] A common milling fixture for the front and rear sub-assemblies of a battery casing includes:

[0008] Jig base;

[0009] The first top pressing mechanism has multiple components arranged along the length direction of the fixture base plate;

[0010] The second top pressing mechanism is provided in multiple ways along the length of the fixture base plate. The second top pressing mechanism is parallel to and spaced apart from the first top pressing mechanism.

[0011] Two third top clamping mechanisms are symmetrically arranged on the base plate of the fixture, with the third top clamping mechanism being close to the second top clamping mechanism.

[0012] The fourth top clamping mechanism is provided in two symmetrical arrangements on the base plate of the fixture, and the fourth top clamping mechanism is located on both sides of the second top clamping mechanism;

[0013] When installing the front sub-assembly of the product, the first top pressing mechanism and the second top pressing mechanism press down on the product;

[0014] When installing the rear sub-assembly of the product, the first top pressing mechanism located in the middle presses down on the product, while the third and fourth top pressing mechanisms press down on the product at the same time.

[0015] As a further improvement of this utility model, the two third top pressing mechanisms are arranged symmetrically and in opposite directions.

[0016] As a further improvement of this utility model, the two fourth top pressing mechanisms are arranged inclined and symmetrically.

[0017] As a further improvement of this utility model, the first top pressing mechanism, the second top pressing mechanism, the third top pressing mechanism, and the fourth top pressing mechanism have the same structure, including a pressing cylinder, a pressing plate, and a pressing head, wherein...

[0018] The downward pressure cylinder is mounted on the base plate of the fixture;

[0019] One end of the pressure plate is connected to the cylinder shaft of the lowering cylinder, and the other end is equipped with the pressure head.

[0020] As a further improvement of this utility model, it also includes a side pressing mechanism, which is provided in multiple sets on the base plate of the fixture. Each set of the side pressing mechanism consists of an active support component and a passive support block. The active support component and the passive support block in the same set are used to support the symmetrical surface of the product.

[0021] As a further improvement of this utility model, the active support assembly includes a side support cylinder and a support head, wherein the support head is disposed at the cylinder shaft end of the side support cylinder.

[0022] As a further improvement of this utility model, it also includes a bottom support mechanism, which is disposed on the base plate of the fixture and used to support the bottom surface of the product.

[0023] As a further improvement of this utility model, the bottom support mechanism includes a mounting base, a support rod, and a bottom support cylinder, wherein,

[0024] The mounting base is disposed on the base plate of the fixture;

[0025] One end of the support rod is hinged to the mounting base, and the other end is used to support the bottom surface of the product;

[0026] The bottom support cylinder is installed on the bottom surface of the fixture base plate, and its cylinder axis passes through the fixture base plate and abuts against the support rod.

[0027] As a further improvement of this utility model, the bottom support mechanism also includes an independent support member, which is used to supplement the empty space of the bottom surface of the product.

[0028] As a further improvement of this utility model, the base plate of the fixture is provided with multiple hollow areas. When the product is installed, the weld scars formed at the product welding point are exposed in the hollow areas. The weld scars are treated and holes are drilled on the product surface through the hollow areas.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Reduce production costs: A single fixture enables the shared clamping of the front and rear sub-assemblies of the battery casing, avoiding the need to develop and maintain multiple sets of dedicated fixtures, significantly reducing the number of fixtures and saving manufacturing, storage and management costs.

[0031] 2. Improve production efficiency and flexibility: No need to change fixtures, different workpieces can be quickly adapted by switching different clamping mechanism combinations through pneumatic control, which greatly shortens changeover time, improves production line cycle time and equipment utilization, and is suitable for intelligent manufacturing scenarios with mixed production of multiple models.

[0032] 3. Improve machining accuracy and process integration: The structure combines top multi-directional clamping, side symmetrical positioning and bottom lever support to ensure stable and reliable clamping; at the same time, the fixture base plate is set with a hollow area to facilitate weld scar treatment and drilling without disassembling the workpiece, reduce repeated positioning errors and improve machining consistency and process integrity. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the battery housing rear sub-assembly when it is installed on the base plate of the fixture of this utility model;

[0034] Figure 2 This is the utility model Figure 1 A structural diagram from another perspective;

[0035] Figure 3 This is the utility model Figure 1 A schematic diagram of the bottom structure;

[0036] Figure 4 This is a schematic diagram of the structure of the front end sub-assembly of the battery housing when it is installed on the base plate of the fixture of this utility model;

[0037] Figure 5 This is the utility model Figure 4 A schematic diagram of the bottom structure.

[0038] In the diagram, 100 is the fixture base plate; 110 is the first top clamping mechanism; 111 is the downward pressing cylinder; 112 is the pressure plate; 113 is the pressure head; 120 is the second top clamping mechanism; 130 is the third top clamping mechanism; 140 is the fourth top clamping mechanism; 150 is the side clamping mechanism; 151 is the side support cylinder; 152 is the support head; 153 is the passive support block; 160 is the bottom support mechanism; 161 is the mounting base; 162 is the support rod; 163 is the bottom support cylinder; 164 is the support component; 170 is the hollow area; 200 is the front sub-assembly of the product; and 300 is the rear sub-assembly of the product. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0040] like Figures 1-5 As shown, this utility model provides a common milling fixture for the front and rear sub-assemblies of a battery casing, comprising:

[0041] Jig bottom plate 100;

[0042] The first top pressing mechanism 110 has multiple parts arranged along the length direction of the fixture base plate 100;

[0043] Multiple second top pressing mechanisms 120 are provided along the length of the fixture base plate 100. The second top pressing mechanisms 120 are parallel to and spaced apart from the first top pressing mechanism 110.

[0044] The third top pressing mechanism 130 is symmetrically arranged in two on the fixture base plate 100, and the third top pressing mechanism 130 is close to the second top pressing mechanism 120.

[0045] The fourth top pressing mechanism 140 is provided in two symmetrical arrangements on the fixture base plate 100, and the fourth top pressing mechanism 140 is located on both sides of the second top pressing mechanism 120;

[0046] When installing the front sub-assembly 200 of the product, the first top pressing mechanism 110 and the second top pressing mechanism 120 press down on the product;

[0047] When the rear sub-assembly 300 of the product is installed, the first top pressing mechanism 110 located in the middle presses down on the product, while the third top pressing mechanism 130 and the fourth top pressing mechanism 140 press down on the product at the same time.

[0048] In other words, by differentiatingly arranging multiple sets of top clamping mechanisms on the same fixture base plate 100 and adopting a selective activation mechanism, the shared clamping of the front and rear sub-assemblies of the battery casing is achieved. This switching process does not require replacing or adjusting the main structure of the fixture. The clamping mode can be switched simply by selecting different clamping mechanisms, thereby achieving efficient sharing of "one fixture, two products".

[0049] Compared to existing technologies that require two separate sets of fixtures to clamp the front and rear sub-assemblies of the battery casing, the milling fixture provided in this embodiment has at least the following advantages:

[0050] 1. Reduce production costs: By using a single fixture to achieve shared clamping for the front and rear sub-assemblies, the number of fixtures to be developed, manufactured, and maintained is reduced, significantly saving manufacturing and warehousing costs.

[0051] 2. Improve production efficiency: No need to change fixtures, just switch clamping modes through pneumatic control, which greatly shortens changeover time and improves production line cycle time and equipment utilization.

[0052] 3. Enhance process consistency: The same fixture platform ensures that the benchmarks are consistent during front-end and back-end processing, which helps to improve overall assembly accuracy and product consistency.

[0053] Overall, this shared milling fixture not only achieves multi-functional reuse in structure, but also brings significant engineering application value in terms of cost reduction, efficiency improvement, and quality enhancement. It is suitable for intelligent manufacturing scenarios involving mass production and mixed production lines of power batteries.

[0054] Preferably, the two third top clamping mechanisms 130 are symmetrically and oppositely arranged, which can accurately clamp the two vertical edge areas of the rear sub-assembly and ensure that the clamping force is evenly distributed on the edge position with strong structural rigidity.

[0055] The two fourth top clamping mechanisms 140 are arranged obliquely and symmetrically according to the contour features of the rear sub-assembly, and correspondingly clamp the two oblique parts to achieve a close-fitting fixation of the irregular edge.

[0056] This layout is perfectly matched to the geometric characteristics of the rear sub-assembly. Through multi-directional coordinated clamping, it effectively prevents product deformation and displacement during processing, significantly improving clamping stability and positioning accuracy. In particular, it can effectively suppress the offset caused by vibration and cutting force during high-precision milling, ensuring the consistency of processing quality.

[0057] Preferably, the first top pressing mechanism 110, the second top pressing mechanism 120, the third top pressing mechanism 130, and the fourth top pressing mechanism 140 have the same structure, including a pressing cylinder 111, a pressing plate 112, and a pressing head 113, wherein...

[0058] The downward pressure cylinder 111 is mounted on the fixture base plate 100;

[0059] One end of the pressure plate 112 is connected to the cylinder shaft of the pressing cylinder 111, and the other end is equipped with a pressure head 113, which is driven by the cylinder to achieve the vertical pressing action.

[0060] This shared structural design not only simplifies the manufacturing process and component types of the fixture, reducing processing and spare parts management costs, but also improves the system's reliability and maintenance efficiency through standardized modules. At the same time, the unified pneumatic control logic facilitates the integration of automated control programs, enabling rapid switching between different product clamping modes, further enhancing the fixture's flexibility and intelligence.

[0061] Preferably, it also includes a side clamping mechanism 150, which is provided in multiple sets on the fixture base plate 100. Each set of side clamping mechanisms 150 consists of an active support component and a passive support block 153. The active support component and the passive support block 153 in the same set are used to support the symmetrical surface of the product. The active support component provides adjustable support force through pneumatic drive, while the passive support block 153 serves as a fixed positioning reference surface. The two work together to accurately limit and clamp the left and right symmetrical surfaces of the product, effectively preventing lateral displacement or vibration caused by cutting force during processing.

[0062] This design improves the stability and positioning accuracy of product clamping, especially in high-load machining processes such as milling, effectively suppressing product deformation and ensuring consistent machining quality. At the same time, the active and passive cooperation structure simplifies the operation process, facilitates automated clamping, and further improves production efficiency and fixture versatility.

[0063] Furthermore, the active support assembly includes a side support cylinder 151 and a support head 152. The support head 152 is located at the end of the cylinder shaft of the side support cylinder 151. The support head 152 is moved by the extension and retraction of the cylinder, thereby realizing active clamping and rapid release of the side of the product. This structure is responsive and reliable, and can accurately control the clamping force and stroke according to the clamping requirements of different products.

[0064] Preferably, it also includes a bottom support mechanism 160, which is disposed on the fixture base plate 100 and used to support the bottom surface of the product. The bottom support mechanism 160 includes a mounting base 161, a support rod 162, and a bottom support cylinder 163.

[0065] Mounting base 161 is disposed on fixture base plate 100;

[0066] One end of the support rod 162 is hinged to the mounting base 161, and the other end is used to support the bottom surface of the product;

[0067] The bottom support cylinder 163 is installed below the fixture base plate 100. The cylinder passes through the base plate axially and abuts against the middle or near end of the support rod 162. When the cylinder is activated, it pushes the support rod 162 to rotate and lift around the hinge point, thereby driving the free end to rise and achieving lifting support for the bottom surface of the workpiece.

[0068] This structure adopts a "cylinder lifting + lever support rod" design, which not only achieves stable lifting of the workpiece from below, effectively preventing sinking or vibration during processing, but also realizes automatic lifting and lowering of the support action through pneumatic control, facilitating the loading, unloading and positioning of the workpiece. At the same time, this layout hides the main drive components under the base plate, saving space, avoiding interference, and improving the overall compactness and safety of the fixture. With multi-point arrangement, it can ensure uniform bottom support, improve clamping rigidity and machining accuracy.

[0069] Preferably, the bottom support mechanism 160 further includes an independent support member 164, which is fixed on the fixture base plate 100 and is positioned to correspond to the empty area on the bottom surface of the product that is not covered by the movable support rod 162. It is used to supplement the support and ensure that the entire bottom surface of the workpiece forms a complete and uniform support surface. Especially for battery casing sub-assemblies with complex structures and cavities or discontinuous load-bearing surfaces at the bottom, it can effectively prevent deformation or vibration caused by local suspension.

[0070] Preferably, the fixture base plate 100 has multiple hollow areas 170. When the product is installed, the weld scars generated at its welding parts are precisely aligned with and exposed in these hollow areas 170. Subsequent processing such as weld scar grinding, cleaning or inspection can be carried out from below without disassembling the workpiece. At the same time, the hollow structure also allows drilling operations on the product surface from the bottom, realizing continuous operation of multiple processes in the same positioning state.

[0071] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0072] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0073] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0075] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A milling fixture for the front and rear sub-assemblies of a battery casing, characterized in that, include: Jig base plate; The first top pressing mechanism has multiple components arranged along the length direction of the fixture base plate; The second top pressing mechanism is provided in multiple ways along the length of the fixture base plate. The second top pressing mechanism is parallel to and spaced apart from the first top pressing mechanism. Two third top clamping mechanisms are symmetrically arranged on the base plate of the fixture, with the third top clamping mechanism being close to the second top clamping mechanism. The fourth top clamping mechanism is provided in two symmetrical arrangements on the base plate of the fixture, and the fourth top clamping mechanism is located on both sides of the second top clamping mechanism; When installing the front sub-assembly of the product, the first top pressing mechanism and the second top pressing mechanism press down on the product; When installing the rear sub-assembly of the product, the first top pressing mechanism located in the middle presses down on the product, while the third and fourth top pressing mechanisms press down on the product at the same time.

2. The shared milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, The two third top clamping mechanisms are symmetrically arranged and in opposite directions.

3. The shared milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, The two fourth top clamping mechanisms are arranged at an angle and symmetrically.

4. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, The first, second, third, and fourth top pressing mechanisms have the same structure, including a pressing cylinder, a pressing plate, and a pressing head. The downward pressure cylinder is mounted on the base plate of the fixture; One end of the pressure plate is connected to the cylinder shaft of the lowering cylinder, and the other end is equipped with the pressure head.

5. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, It also includes a side clamping mechanism, which is provided in multiple sets on the base plate of the fixture. Each set of the side clamping mechanism consists of an active support component and a passive support block. The active support component and the passive support block in the same set are used to support the symmetrical surface of the product.

6. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 5, characterized in that, The active support assembly includes a side support cylinder and a support head, with the support head disposed at the end of the cylinder shaft of the side support cylinder.

7. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, It also includes a bottom support mechanism, which is disposed on the base plate of the fixture and is used to support the bottom surface of the product.

8. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 7, characterized in that, The bottom support mechanism includes a mounting base, a support rod, and a bottom support cylinder, wherein... The mounting base is disposed on the base plate of the fixture; One end of the support rod is hinged to the mounting base, and the other end is used to support the bottom surface of the product; The bottom support cylinder is installed on the bottom surface of the fixture base plate, and its cylinder axis passes through the fixture base plate and abuts against the support rod.

9. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 7, characterized in that, The bottom support mechanism also includes an independent support member, which is used to supplement the empty space on the bottom surface of the product.

10. A common milling fixture for the front and rear sub-assemblies of a battery casing according to claim 1, characterized in that, The fixture base plate has multiple hollow areas. When the product is installed, the weld scars formed at the product welding point are exposed in the hollow areas. The weld scars are treated and holes are drilled on the product surface through the hollow areas.

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