Punching clamping tool based on battery cell pressing strip and punching method based on punching clamping tool

Abstract

The invention discloses a punching clamping tool based on a battery cell pressing strip and a punching method based on the punching clamping tool. The tool mainly comprises a positioning baffle, a pedestal, fence bosses and a tail end positioning rack, the surface of the pedestal adopts the fence boss spaced hollow design in the width direction, and through the supporting effect of the fence bosses and the clamping effect of the positioning baffle, a battery cell pressing strip in a convex block shape and a battery cell pressing strip in a groove shape are effectively fixed and positioned; mounting bolts and a pressing sheet are arranged on the surface of the tail end positioning rack, the two ends of the pressing sheet are movably connected with the two tail end positioning holes through the mounting bolts after being positively screwed and punched, and the tightness of the pressing sheet is controlled through the mounting bolts; manual positioning is replaced by matching of the fence boss and the positioning baffle and fixing of the tail end pressing piece, and precision is improved. According to the positioning and clamping tool, clamping of battery cell pressing strip products and accurate punching and positioning of the products are achieved, side-by-side machining of multiple battery cell pressing strip products is supported, and the problems that traditional machining errors are large, workpieces are damaged, and adaptability is poor are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of tooling, specifically to a punching and clamping tooling based on a battery cell clamping strip and a punching method based thereon. Background Technology

[0002] The continuous development of the electric vehicle market has driven a gradual increase in the production of battery cell pressing strips, an essential component in the passenger vehicle battery field. The need for high-efficiency operations is pushing forward the processing speed of battery cell pressing strips, making a clamping fixture that can accelerate the drilling efficiency of these strips particularly important.

[0003] Tooling fixtures are important auxiliary tools in the processing and forming of battery cell pressing strips. Their main function is to position and fix the semi-finished battery cell pressing strips during machining. During the drilling process of the battery cell pressing strips, fixtures can effectively position the drilling location, ensuring that the product does not slip or become eccentric under the drilling of equipment such as engraving machines. They also prevent damage to the pressing strips due to equipment malfunctions, ensuring that the drilling position of the battery cell pressing strips is accurate.

[0004] The existing method for drilling battery cell strips generally involves fixing the workpiece directly onto the base of the drilling equipment, manually adjusting the tooling position to establish the reference location for the drilling position, and manually aligning the drill bit. This process relies heavily on the experience of different operators and the accuracy of the measuring equipment, resulting in significant human error. Furthermore, previous attempts to hold the battery cell strips using clamps have been hampered by the fact that clamps, designed to provide reliable clamping force, are often made of high-strength and high-hardness materials. Since battery cell strips have relatively low hardness and are brittle, they are prone to leaving indentations and scratches during clamping, affecting the function and quality of high-precision workpieces. Insufficient clamping force can also cause the strip to deviate, impacting processing. Summary of the Invention

[0005] To address the problems existing in the background technology, the present invention provides a novel positioning and punching clamping fixture for effectively realizing the punching of battery cell strip products and a punching method based thereon. It can effectively position and calibrate the punching area of ​​strip-shaped battery cell strips of different shapes without damaging the semi-finished battery cell strip and without using additional manual clamping tools.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A punching clamping fixture based on a battery cell pressure bar includes a positioning baffle, a base, a fence boss, and a tail positioning frame.

[0008] The platform is I-shaped and made of hot-rolled steel, and its surface is treated with paint for rust prevention.

[0009] The positioning baffle, the fence protrusion, and the tail positioning platform are all directly fixed on the base;

[0010] The fence protrusions are fixed to the upper surface of the base, and adopt a hollow design with intervals along the width of the base. This design can effectively install both concave and convex pressure strips. The number of fence protrusions can be set according to actual needs, and multiple fence protrusions can clamp multiple strips at the same time. The interval between each pair of fence protrusions is 1.0cm to 20.0cm.

[0011] The fence protrusions are divided into two ends along the length of the base, and fence protrusion holes are provided in an area of ​​approximately 10-30cm from the first end. Base holes are provided on the recessed base between the fence protrusions, and these base holes are located in the middle area of ​​the base. The number, diameter, and position of these base holes correspond one-to-one with the holes on the fence protrusions on both sides. These fence protrusion holes and base holes are the drilling positions for the product. The number of holes can be increased as needed. Preferably, based on the required length of the battery cell strip, holes can be drilled approximately 1 / 3 of the total length of the battery cell strip from the first end of the fence protrusion. 3. Drill holes for the fence boss and the base at 1 / 2 and 2 / 3 of the drilling depth, respectively, as positioning holes. The diameter of the fence boss hole and the base hole should be ≤ 2 / 3 of the width of the fence boss; otherwise, misalignment of the drilled holes may occur due to wear on the drilling edges. The positioning holes are used to fix the transverse steel sheet of the battery cell pressure strip. Furthermore, the fence boss hole can be adjusted according to the shape of the drill bit, including but not limited to circles, equilateral triangles, squares, etc. Drilling is performed with the positioning hole as the base point, and the hole diameter range can be selected within... To prevent the drill bit from cutting the base and damaging the drill bit after drilling through the product but not aligning with the drilling position;

[0012] The positioning baffle itself can be formed by welding or by cutting directly on the pedestal. The positioning baffle is located in the middle area between the two sides of the pedestal and the fence protrusions. The length of the positioning baffle is 1.0 to 10.0 cm, and the number of positioning baffles can be adjusted according to the length of the pedestal. The specific adjustment method is as follows: if the pedestal is long, iron sheets of the same width, thickness and length as the positioning baffle can be cut out as new positioning baffles. They are welded to the positioning baffle at a distance of 1 / 2 of the product length and along the length of the pedestal. The specific spacing is adjusted according to the protruding shape of the battery cell pressure strip product. The length of the positioning baffle is generally not greater than the length of the pedestal. If the length is greater than the pedestal, the excess length can be cut off directly. The number of positioning baffles can be increased accordingly by cutting according to the number of holes, thickness and number of fence protrusions of the actual battery cell pressure strip product, but generally not less than two (in the case of a single fence protrusion).

[0013] The tail-end positioning bench is installed on both sides of the tail end of the pedestal, and the fixing device can move left and right to adapt to cell pressing strip products of various widths; screw positioning holes, i.e., the tail-end positioning holes, are provided in the middle of the tail-end positioning bench for fixing the rolling steel pressing sheet of the cell pressing strip, and meanwhile, they play a role in balancing the forces at both ends of the pressing strip. The number of tail-end positioning benches can be increased accordingly according to the length of the profile, and the additional benches can be located in the middle of the tail end of the pedestal.

[0014] Bolts and pressing sheets need to be installed on the surface of the tail-end positioning bench. Threaded holes are drilled at both ends of the pressing sheet. After drilling, the pressing sheet is movably connected to the two tail-end positioning holes through the installed bolts, and the tightness of the pressing sheet can be controlled through the installed bolts; the pressing sheet can be made of composite material, steel sheet material, etc.; among them, the selected pressing sheet needs to have a certain stiffness (if polyurethane material is used, the hardness should be >80A Shore hardness) and toughness to prevent the profile from being cracked, and at the same time, it must also play a certain role in pressing and fixing; further, a flexible PU pad is installed on the lower surface of the pressing sheet, that is, a gasket with polyurethane added.

[0015] One first-end positioning hole is provided on the upper surface of the pedestal on both sides of the first end of the fence boss, and a "Ji"-shaped cushion block is provided at the first end of each fence boss to fix and position the end of the cell pressing strip through the first-end positioning hole.

[0016] Further, the height of the pedestal can be adjusted according to the height of the cutter head of the grinding and engraving machine.

[0017] Further, a screw lift can be installed at the lower end of the pedestal. The surface area of the lift needs to be larger than the surface area of the pedestal, and the lift can withstand a pressure >100.0 kg.

[0018] Further, fixing blocks can be installed on the front and back sides of the pedestal, and the fixing blocks are placed on the lower surface of the pedestal; the length of the fixing blocks is generally less than 2 / 3 of the width of the positioning baffle on the surface of the pedestal; the width of the fixing blocks needs to meet the fixing length of the table surfaces of engraving machines, drilling machines, etc., and is convenient for fixing the pedestal in the later stage; further, bolt holes can be installed on the surface of the fixing blocks for fixing, and the relative position between the pedestal and the fixing blocks can be adjusted through bolts, and the clamping force can be adjusted through bolts; further, the surface of the fixing blocks can be cut or welded for snap installation.

[0019] Further, 2 / 3 of the width of the fence boss should be ≥1.0 cm, so as to provide sufficient edge support ability for product drilling. Otherwise, edge indentation may occur during the pressing and drilling process.

[0020] Furthermore, the fence protrusions can be located at ≥4 / 5 and ≤1 / 5 of the horizontal width of the base, or they can be installed in the middle area of ​​the horizontal width of the base, with multiple fence protrusions installed at average intervals according to the horizontal width of the base. The width of the fence protrusions is changed according to the shape of the battery cell pressure strip product. Generally, the width of the fence protrusions needs to be greater than 1.0cm. The number of fence protrusions can be increased according to the number of holes required for the product. If there are many products to be drilled, multiple fence protrusions can be installed in parallel on the surface of the base at the same time to reduce the spacing between the fence protrusions, further reduce the installation time of the battery cell pressure strip product, and realize the drilling of multiple battery cell pressure strip products at the same time.

[0021] Furthermore, the fence protrusions can be installed on the base by welding, bonding, clamping, inlaying, cutting, etc. In order to facilitate subsequent adjustment of the width and number, it is generally recommended to use the clamping method for installation.

[0022] Furthermore, the material of the fence boss should be selected as alloy steel or cast iron with certain rigidity (Rockwell hardness range of HRC 25-30), but tough and not brittle, to avoid the phenomenon of high-temperature cutting material splashing when drilling and offset.

[0023] Furthermore, to accommodate battery cell pressure bars with different concave shapes, the positioning baffle itself can be cylindrical, rectangular, or have a raised circular shape. The height of the positioning baffle is generally no higher than 4 / 5 of the height of the convex product, and the height of the raised fence should also be no higher than 4 / 5 of the height of the convex product. Furthermore, the width and height of the positioning baffle can be adjusted by cutting or bonding.

[0024] Furthermore, the present invention also provides a method for punching holes in a battery cell pressure bar using the above-mentioned tooling, comprising the following steps:

[0025] (1) Fixing the base: Use a level to calibrate the levelness of the base and install the base on the surface of the engraving machine or drilling machine; preferably, a resin pad can be installed on the lower surface for cushioning before fixing the base.

[0026] When placing the product, a level must be used to calibrate the levelness of the platform to avoid drilling at an angle due to a tilted platform, which could harm the product and production safety.

[0027] For automated drilling equipment, the placement area of ​​the platform must be accurately measured in advance to avoid the program design affecting the drilling accuracy. For manual drilling equipment, it is necessary to ensure that the drill bit is installed accurately and that there is no bending caused by impact. Before use, the drill bit type and material must be determined to avoid breakage and metal splattering during accidental cutting.

[0028] (2) Product fixing: Starting from the positioning hole area at the tail end of the platform, to prevent the battery cell strip from slipping in the longitudinal 0° direction during drilling, a spiral telescopic baffle controlled by fastening screws is installed at the tail end area of ​​the battery cell strip product. After the on-site measurement of the product's drilling area is completed, the spiral rod is secured by the limiting device in the spiral telescopic baffle. For multiple profiles, the limiting and fixing areas of all battery cell strip products need to be adjusted simultaneously to ensure that the products can be formed in multiple batches at once. At the same time, the drilling equipment can also be modified to allow multiple cutters to be used simultaneously, which can drill different areas of the product at once, greatly improving the drilling efficiency of the battery cell strip products. After a stage of drilling is completed, there is no need to adjust the spiral structure. Simply loosen the pressure plate and continue to push the spiral rod forward to push it out, and then continue to drill in other areas of the product.

[0029] The spiral telescopic baffle includes a spiral structure and a telescopic baffle. The spiral structure includes a spiral sleeve, a spiral rod and a limiting device.

[0030] For drilling multiple products simultaneously, the telescopic baffle in the spiral telescopic baffle can be extended in different widths and lengths, as well as in the position of the ejection point. This process can be adjusted by installing ejection blocks on the surface of the telescopic baffle. The ejection blocks can be made of wood or polyurethane (PU) pads and are positioned between the telescopic baffle and the pressure plate of the mounting bolt. By installing different ejection blocks, drilling can be performed on different positions of the same series of products at the same time.

[0031] (3) Product drilling: Place the first end of the battery cell strip on the fence protrusion and install a pressure plate on the top of the product. Secure it with mounting bolts. Then, the spiral rod in the spiral telescopic baffle set at the tail end of the product holds the tail end of the product in place. The positioning hole is used to adjust the drilling position of the battery cell strip. The product can be drilled by moving the battery cell strip along the 0° direction of the fence protrusion, thereby reducing the complexity of manual operation.

[0032] For battery cell strip products of different widths, the positioning baffle, positioning platform, and fence boss can be disassembled or glued with composite strips to widen them; multiple battery cell strip products can be fixed at the same time, and the simultaneous use of multiple cutting heads can also improve drilling efficiency; for different types of products, on the one hand, the product profile can be fixed by adjusting the position of the ejector block; on the other hand, the surface holes of the drilling fixture can be re-drilled and installed to adapt to battery cell strip products of different widths.

[0033] (4) Post - processing after drilling: After drilling a batch of products, the spiral telescopic baffle and the "Ji" - shaped cushion block at the head end of the pedestal can be directly removed; then the products are drawn out from the head end of the pedestal and sent to the next grinding process to remove the burrs generated by drilling; after continuously inserting a new profile at the tail end of the drilling clamping tooling and pressing down and fixing the head end, the tail - end spiral telescopic baffle can be optionally not installed, and then the drilling operation can be continued to improve the drilling efficiency.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] (1) By adopting the positioning clamping tooling, the present invention realizes the clamping of the cell strip products and the precise drilling positioning of the products.

[0036] (2) Through the supporting of the fence bosses and the clamping effect of the positioning baffle, the present invention effectively fixes and positions the cell strip with bump - shaped and the cell strip with groove - shaped.

[0037] (3) The tooling of the present invention, through the cooperation of the fence bosses and the positioning baffle and the tail - end fixation, replaces manual positioning to improve the accuracy; adopts dispersed clamping to avoid workpiece indentation and scratches; the fence interval design is adapted to the concave - convex shape, and the detachable adjustment structure is adapted to different widths; supports multiple parallel processing, and there is no longitudinal limit for facilitating the adjustment of the drilling position to improve the efficiency; the holes of the fence bosses protect the drill bits, extend the service life of the equipment, and effectively solve the problems of large traditional processing errors, workpiece damage, poor adaptability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the main structural schematic diagram of the drilling clamping tooling based on the cell strip of the present invention.

[0039] Figure 2 is the top - view of the main structure of the drilling clamping tooling based on the cell strip of the present invention.

[0040] Figure 3 is the right - view of the main structure of the drilling clamping tooling based on the cell strip of the present invention.

[0041] Figure 4 is the side - view of the main structure of the drilling clamping tooling based on the cell strip of the present invention.

[0042] Figure 5 is the schematic diagram of the main structure, the pressing piece, the "Ji" - shaped cushion block and the product - using structure of the drilling clamping tooling based on the cell strip of the present invention.

[0043] Figure 6 is the schematic diagram of the drilling clamping tooling for installing resin cushion blocks, the spiral telescopic baffle and the product - using structure of the present invention.

[0044] Figure 7This refers to the spiral structure in the spiral telescopic baffle described in this invention.

[0045] Figure 8 This is a schematic diagram of the pedestal structure for the mounting and fixing block described in this invention.

[0046] Figure 9 This is a schematic diagram of the pressure plate and mounting bolt structure described in this invention.

[0047] The attached drawings are labeled as follows: 1. Positioning baffle, 2. Base, 3. Fence boss hole, 4. Fence boss, 5. Tail end positioning frame, 6. Head end positioning hole, 7. Tail end positioning hole, 8. Base hole, 9. Pressure plate, 10. Mounting bolt, 11. "U" shaped pad, 12. Fixing block, 13. Spiral telescopic baffle, 13-1. Spiral sleeve, 13-2. Spiral rod, 13-3. Limiting device, 14. Resin pad, 15. Battery cell pressure strip. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] First, an explanation of the terminology involved in this invention is provided:

[0051] Cell pressure strip: A strip, plate, or other sheet, cylindrical, or tubular composite material made of polyurethane resin, glass fiber, carbon fiber, and corresponding fabrics through a pultrusion injection molding process. It is mainly used in the battery field to ensure a good electrical connection between the battery and the equipment.

[0052] Composite materials: a category of materials that combine two or more different materials to obtain a synthetic material.

[0053] Bolts: A type of fastener consisting of a head and a shank (a cylinder with external threads), which must be used with a nut to fasten two parts with through holes.

[0054] Example

[0055] A punching clamping fixture based on a battery cell pressure bar includes a positioning baffle 1, a base 2, a fence boss 4, and a tail positioning frame 5.

[0056] The platform 1 is I-shaped and made of hot-rolled steel, and its surface is treated with paint for rust prevention.

[0057] The positioning baffle 1, the fence protrusion 4 and the tail positioning frame 5 are all directly fixed on the base 2.

[0058] The fence protrusions 4 are fixed to the upper surface of the base 2, and adopt a hollow design with intervals along the width of the base. This design can effectively install both concave and convex pressure strips. The number of fence protrusions can be set according to actual needs, and multiple fence protrusions can clamp multiple strips at the same time. The interval between each pair of fence protrusions is 1.0cm to 20.0cm.

[0059] The fence protrusions 4 are divided into two ends along the length of the base, and fence protrusion holes 3 are provided in an area of ​​approximately 10-30cm from the first end. Base holes 8 are provided on the recessed base between the fence protrusions, and these holes are located in the middle area of ​​the base. The number, diameter, and position of these holes correspond one-to-one with the holes on the fence protrusions on both sides. The fence protrusion holes and base holes are the drilling positions for the product. The number of holes can be increased as needed. Preferably, based on the length requirements of the battery cell strip, holes can be drilled approximately 1 / 3 of the total length of the battery cell strip from the first end of the fence protrusion. Drill holes for the fence boss and the base at 1 / 3, 1 / 2, and 2 / 3 of the width, respectively, as positioning holes. The diameter of the fence boss and base holes should be ≤ 2 / 3 of the width of the fence boss; otherwise, misalignment of the drilled holes may occur due to wear on the drilling edges. The positioning holes are used to fix the transverse steel sheet of the battery cell pressure strip. Furthermore, the fence boss holes can be adjusted according to the shape of the drill bit, including but not limited to circles, equilateral triangles, squares, etc. Drilling is performed with the positioning holes as the base point, and the hole diameter range can be selected within... To prevent the drill bit from cutting the base and damaging the drill bit after drilling through the product but not aligning with the drilling position;

[0060] The positioning baffle 1 itself can be fixed by welding or directly formed by cutting on the base. The positioning baffle is located in the middle area between the two sides of the pedestal and the fence boss. The length of the positioning baffle is 1.0 - 10.0 cm, and the number of positioning baffles can be adjusted according to the length of the pedestal. The specific adjustment method is as follows: If the length of the pedestal is relatively long, iron sheets with the same width, the same thickness, and the same length range as the positioning baffle can be cut out as new positioning baffles, and they are welded at an interval of 1 / 2 of the product length along the length direction of the pedestal. The specific spacing is adjusted according to the protruding-shaped battery core pressing strip product. The length of the positioning baffle generally will not be > the length of the pedestal. If the length > the pedestal, the excess length can be directly cut off. The number of positioning baffles is increased accordingly by cutting according to the number of holes, thickness, and the number of fence bosses of the actual battery core pressing strip product, but generally not less than two (in the case of a single fence boss).

[0061] The tail-end positioning pedestal 5 is installed on both sides of the tail end of the pedestal, and the fixing device can move left and right to adapt to battery core pressing strip products of various widths. Tail-end positioning holes 7 are provided in the middle of the tail-end positioning pedestal. These tail-end positioning holes are screw positioning holes, which are used to fix the rolling steel pressing sheet of the battery core pressing strip and play a role in balancing the forces at both ends of the pressing strip. The number of tail-end positioning pedestals can be increased accordingly according to the length of the profile. The additional pedestals can be located in the middle of the tail end of the pedestal.

[0062] Bolts 10 and pressing sheets 9 need to be installed on the surface of the tail-end positioning pedestal 5. Both ends of the pressing sheet are drilled with right-hand threads. After drilling, they are movably connected to the two tail-end positioning holes through the installation bolts. The tightness of the pressing sheet can be controlled by the installation bolts. The pressing sheet can be made of composite materials, steel sheets, etc. Among them, the selected pressing sheet needs to have a certain stiffness (if polyurethane material is used, the hardness should be > 80A Shore hardness) and toughness to prevent the profile from being cracked, and at the same time, it must also play a certain role in pressing and fixing. Further, a flexible PU pad is installed on the lower surface of the pressing sheet, that is, a gasket with polyurethane added.

[0063] One first-end positioning hole 6 is provided on the upper surface of the pedestal on both sides of the first end of the fence boss, and a "ji"-shaped spacer 11 is provided at the first end of each fence boss to fix and position the end of the battery core pressing strip through the first-end positioning hole.

[0064] Further, the height of the pedestal can be adjusted according to the height of the cutter head of the grinding and engraving machine.

[0065] Further, a screw lift can be installed at the lower end of the pedestal. The surface area of the lift needs to be larger than the surface area of the pedestal, and the lift can withstand a pressure > 100.0 kg.

[0066] Furthermore, fixing blocks 12 can be added to the front and rear sides of the platform, and the fixing blocks are placed on the lower surface of the platform; the length of the fixing block is generally less than 2 / 3 of the width of the positioning baffle on the surface of the platform; the width of the fixing block needs to meet the fixed length of the table of the engraving machine, drilling machine, etc., and facilitate the subsequent fixing of the platform; furthermore, bolt holes can be installed on the surface of the fixing block for fixing, and the relative position between the platform and the fixing block can be adjusted by bolts, and the clamping force can be adjusted by bolts; furthermore, the surface of the fixing block can be cut or welded for snap-fit ​​installation.

[0067] Furthermore, 2 / 3 of the width of the fence boss should be ≥1.0cm to provide sufficient edge support for product drilling; otherwise, edge indentations may occur during the pressing and drilling process.

[0068] Furthermore, the fence protrusions can be located at ≥4 / 5 and ≤1 / 5 of the horizontal width of the base, or they can be installed in the middle area of ​​the horizontal width of the base, with multiple fence protrusions installed at average intervals according to the horizontal width of the base. The width of the fence protrusions is changed according to the shape of the battery cell pressure strip product. Generally, the width of the fence protrusions needs to be greater than 1.0cm. The number of fence protrusions can be increased according to the number of holes required for the product. If there are many products to be drilled, multiple fence protrusions can be installed in parallel on the surface of the base at the same time to reduce the spacing between the fence protrusions, further reduce the installation time of the battery cell pressure strip product, and realize the drilling of multiple battery cell pressure strip products at the same time.

[0069] Furthermore, the fence protrusions can be installed on the base by welding, bonding, clamping, inlaying, cutting, etc. In order to facilitate subsequent adjustment of the width and number, it is generally recommended to use the clamping method for installation.

[0070] Furthermore, the material of the fence boss should be selected as alloy steel or cast iron with certain rigidity (Rockwell hardness range of HRC 25-30), but tough and not brittle, to avoid the phenomenon of high-temperature cutting material splashing when drilling and offset.

[0071] Furthermore, to accommodate battery cell pressure bars with different concave shapes, the positioning baffle itself can be cylindrical, rectangular, or have a raised circular shape. The height of the positioning baffle is generally no higher than 4 / 5 of the height of the convex product, and the height of the raised fence should also be no higher than 4 / 5 of the height of the convex product. Furthermore, the width and height of the positioning baffle can be adjusted by cutting or bonding.

[0072] The grooved battery cell clamping strips can be inverted and attached to the four protrusions of the grid. A pressure plate is installed at the tail end for pressing, and positioning bolt holes are installed at both ends of the pressure plate for tightening. The base is a concave I-shape for easy clamping onto the surface of equipment such as engraving machines. Multiple grooved battery cell clamping strips can be attached side-by-side to different columns of grid protrusions. Since this fixture does not restrict longitudinal movement, only lateral clamping, long, strip-shaped battery cell clamping strips can be loosened and moved forward to drill holes at different positions.

[0073] Furthermore, the battery cell clamping strip with protruding features can be inverted and placed between the fence protrusion and the positioning baffle, and pressed down using the clamping plate installed at the tail end. It can be tightened and loosened using the bolt holes. Multiple battery cell clamping strips with protruding features can be placed side by side in the recessed area between the fence protrusion and the positioning baffle. Since there is no restriction on the longitudinal direction, only lateral clamping, for long strip-shaped battery cell clamping strips, the bolts can be loosened and the strip can be moved forward to drill holes at different positions.

[0074] Furthermore, for flat-type cell clamping strips, clamping installation can be performed in the recessed area between the positioning baffle 1 and the fence protrusion 4, or in the area between the two fence protrusions and the area between the two positioning baffles 1. For flat-type polyurethane clamping strips, it is necessary to confirm whether the thickness can withstand downward pressure. If the product is too thin, a shim needs to be added to the recessed area below to prevent cracking during the downward drilling process.

[0075] During clamping, sufficient clamping force is required to ensure that the product does not wobble when pushed with fingers. It is also essential to observe the surface of the clamping strip for any dents to avoid excessive pressure that could damage the product.

[0076] A method for drilling holes in a battery cell pressure bar using the above-mentioned tooling includes the following steps:

[0077] (1) Fixing the base: Use a level to calibrate the levelness of the base and install the base on the surface of the engraving machine or drilling machine; preferably, a resin pad can be installed on the lower surface for cushioning before fixing the base.

[0078] When placing the product, a level must be used to calibrate the levelness of the platform to avoid drilling at an angle due to a tilted platform, which could harm the product and production safety.

[0079] For automated drilling equipment, the placement area of ​​the platform must be accurately measured in advance to avoid the program design affecting the drilling accuracy. For manual drilling equipment, it is necessary to ensure that the drill bit is installed accurately and that there is no bending caused by impact. Before use, the drill bit type and material must be determined to avoid breakage and metal splattering during accidental cutting.

[0080] (2) Product fixing: Starting from the positioning hole area at the tail end of the platform, to prevent the battery cell strip from slipping in the longitudinal 0° direction during drilling, a spiral telescopic baffle controlled by fastening screws is installed at the tail end area of ​​the battery cell strip product. After the on-site measurement of the product's drilling area is completed, the spiral rod is secured by the limiting device in the spiral telescopic baffle. For multiple profiles, the limiting and fixing areas of all battery cell strip products need to be adjusted simultaneously to ensure that the products can be formed in multiple batches at once. At the same time, the drilling equipment can also be modified to allow multiple cutters to be used simultaneously, which can drill different areas of the product at once, greatly improving the drilling efficiency of the battery cell strip products. After a stage of drilling is completed, there is no need to adjust the spiral structure. Simply loosen the pressure plate and continue to push the spiral rod forward to push it out, and then continue to drill in other areas of the product.

[0081] The spiral telescopic baffle includes a spiral structure and a telescopic baffle. The spiral structure includes a spiral sleeve, a spiral rod and a limiting device.

[0082] For drilling multiple products simultaneously, the telescopic baffle in the spiral telescopic baffle can be extended in different widths and lengths, as well as in the position of the ejection point. This process can be adjusted by installing ejection blocks on the surface of the telescopic baffle. The ejection blocks can be made of wood or polyurethane (PU) pads and are positioned between the telescopic baffle and the pressure plate of the mounting bolt. By installing different ejection blocks, drilling can be performed on different positions of the same series of products at the same time.

[0083] (3) Product drilling: Place the first end of the battery cell strip on the fence protrusion and install a pressure plate on the top of the product. Secure it with mounting bolts. Then, the spiral rod in the spiral telescopic baffle set at the tail end of the product holds the tail end of the product in place. The positioning hole is used to adjust the drilling position of the battery cell strip. The product can be drilled by moving the battery cell strip along the 0° direction of the fence protrusion, thereby reducing the complexity of manual operation.

[0084] For battery cell strip products of different widths, the positioning baffle, positioning platform, and fence boss can be disassembled or glued with composite strips to widen them; multiple battery cell strip products can be fixed at the same time, and the simultaneous use of multiple cutting heads can also improve drilling efficiency; for different types of products, on the one hand, the product profile can be fixed by adjusting the position of the ejector block; on the other hand, the surface holes of the drilling fixture can be re-drilled and installed to adapt to battery cell strip products of different widths.

[0085] (4) Post-drilling processing: After drilling a batch of products, the spiral telescopic baffle and the "U"-shaped pad at the front end of the platform can be removed directly; then the product is pulled out from the front end of the platform and sent to the next grinding process to remove the burrs generated by drilling; after inserting new profiles into the tail end of the drilling clamping fixture and pressing down to fix the front end, the tail spiral telescopic baffle can be left uninstalled, and the drilling operation can continue to improve drilling efficiency.

Claims

1. A punching and clamping fixture based on a battery cell clamping strip, characterized in that, It includes a positioning baffle (1), a pedestal (2), a fence boss (4) and a tail-end positioning bench (5); Among them, the pedestal (2) is I-shaped and made of hot-rolled steel, and its surface is treated with paint for rust prevention; The positioning baffle (1), the fence boss (4) and the tail-end positioning bench (5) are all directly fixed on the pedestal (2); The fence boss (4) is fixed on the upper surface of the pedestal (2), and a hollow design with intervals of the fence boss (4) is adopted along the width direction of the pedestal. The interval between every two fence bosses (4) is 1.0 cm to 20.0 cm; The fence boss (4) is divided into the head and tail ends along the length direction of the pedestal, and fence boss holes (3) are arranged in the area about 10 to 30 cm from the head end; There are pedestal holes (8) on the concave pedestal between the fence bosses (4), and the pedestal holes (8) are arranged in the middle area of the pedestal. The quantity, aperture size and position all correspond to the fence boss holes on both sides one by one; The fence boss holes (3) and the pedestal holes (8) are used as positioning holes, and their diameter ≤ 2 / 3 of the width of the fence boss, and 2 / 3 of the width of the fence boss ≥ 1.0 cm; The positioning baffle (1) is fixed by welding or directly formed by cutting on the pedestal. The positioning baffle (1) is located in the middle area between the two sides of the pedestal and the fence boss. The length of the positioning baffle is 1.0 to 10.0 cm, and the number of positioning baffles is adjusted according to the length of the pedestal; The tail-end positioning bench (5) is installed on both sides of the tail end of the pedestal. There are tail-end positioning holes (7) in the middle of the tail-end positioning bench (5), and the tail-end positioning holes (7) are screw positioning holes; There are mounting bolts (10) and pressing pieces (9) on the surface of the tail-end positioning bench (5). Both ends of the pressing piece (9) are drilled with right-hand threads. After drilling, it is movably connected with the two tail-end positioning holes (7) through the mounting bolts (10), and the tightness of the pressing piece (9) is controlled through the mounting bolts (10); The pressing piece is made of composite material or steel sheet material; One head-end positioning hole (6) is arranged on the upper surface of the pedestal on both sides of the head end of the fence boss (4), and a "ji"-shaped cushion block (11) is arranged at the head end of each fence boss (4), and the end of the battery cell pressing strip is fixed and positioned through the head-end positioning hole (6).

2. The punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, The height of the pedestal (2) is adjusted according to the height of the cutter head of the grinding and engraving machine; A screw lifting table is installed at the lower end of the pedestal (2). The surface area of the lifting table needs to be larger than the surface area of the pedestal, and the pressure that the lifting table can bear > 100.0 kg.

3. The punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, Fixing blocks (12) are installed on the front and back sides of the pedestal (2), and the fixing blocks (12) are placed on the lower surface of the pedestal; The length of the fixing block is less than 2 / 3 of the width of the positioning baffle on the surface of the pedestal; The surface of the fixing block is fixed through bolt holes, and its surface is installed with a buckle through cutting or welding.

4. The punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, The fence boss is located at the place where the transverse width of the pedestal ≥ 4 / 5 and ≤ 1 / 5 or the transverse middle area of the pedestal; The width of the fence boss is determined according to the shape of the battery cell pressing strip product; The fence boss is installed on the pedestal by welding, bonding, clamping, embedding or cutting, and the clamping method is preferred; The Rockwell hardness range of the material selected for the fence boss is HRC 25 - 30.

5. A punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, The positioning holes are respectively located at about 1 / 3, 1 / 2, and 2 / 3 of the total length of the battery cell pressing strip from the front end of the fence boss; The gate boss holes are adjusted according to the shape of the cutting head, including but not limited to circles, equilateral triangles, and squares. The product is drilled using the positioning hole as a base point, and the hole diameter range is...

6. The punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, The positioning baffle is cylindrical, rectangular or convex-round in shape, and the height of the positioning baffle is not higher than 4 / 5 of the height of the convex product, and the height of the fence boss should also not be higher than 4 / 5 of the height of the convex product; The adjustment method of the number of the positioning baffles is as follows: cut out iron sheets with the same width, the same thickness and the same length range as the positioning baffle as new positioning baffles, and use the welding method to weld them at an interval of 1 / 2 of the product length along the length direction of the pedestal, and the number of the positioning baffles is not less than two; The width and height of the positioning baffle are adjusted by cutting and bonding.

7. A punching and clamping fixture based on a battery cell pressure strip according to claim 1, characterized in that, When the pressing piece is a gasket with polyurethane added, the hardness is >80A Shore hardness.

8. The punching and clamping fixture based on a battery cell pressure strip as described in claim 1, characterized in that, The number of the tail-end positioning brackets is increased correspondingly according to the length of the profile, and the increased tail-end positioning brackets are located at the middle position of the tail end of the pedestal.

9. A method for punching holes in a battery cell pressure strip using the tooling described in any one of claims 1 to 9, characterized in that, It includes the following steps: (1) Fixing the pedestal: Calibrate the horizontality of the pedestal placement with a level, and install the pedestal on the surface of the engraving machine or drilling machine; for automatic drilling equipment, the placement area of the pedestal needs to be measured accurately in advance; for manual drilling equipment, it is necessary to ensure that the drill bit is installed accurately, and the drill bit type and drill bit material need to be determined before use; (2) Fixing the product: Start measuring from the tail-end positioning hole area of the pedestal. To prevent the battery cell pressing strip from slipping longitudinally in the 0° direction during drilling, install a screw-type telescopic baffle controlled by a fastening screw in the tail-end area of the battery cell pressing strip product. After the on-site measurement of the product drilling area is completed, lock the screw rod through the limiting device in the screw-type telescopic baffle; for multiple profiles, adjust the limiting and fixing areas of all battery cell pressing strip products at the same time, and adjust the drilling equipment to enable multiple tool heads at the same time; the screw-type telescopic baffle includes a screw structure and a telescopic baffle, and the screw structure includes a screw sleeve, a screw rod and a limiting device; (3) Drilling the product: Place the front end of the battery cell pressing strip product on the fence boss, and install a pressing piece above the product and fasten it with a mounting bolt. Then, use the screw rod in the screw-type telescopic baffle set at the tail end of the product to顶住 the tail end of the product; the positioning hole is used to adjust the drilling position of the battery cell pressing strip, and the product drilling can be achieved by translating the battery cell pressing strip product along the 0° direction of the fence boss; (4) Post-treatment after drilling: After a batch of products are drilled, the screw-type telescopic baffle and the "几"-shaped cushion block at the front end of the pedestal can be directly removed; then, take out the product from the front end of the pedestal and send it to the next grinding process to remove the burrs generated by drilling; continue to insert a new profile at the tail end of the drilling clamping tooling, and after pressing and fixing the front end, it is possible not to install the tail-end screw-type telescopic baffle, and then continue the drilling operation.

10. The drilling method according to claim 9, characterized in that, Before the pedestal fixing in step (1), install a resin cushion block on the lower surface of the pedestal; When drilling multiple profiles in step (2), install an ejector block on the surface of the telescopic baffle. The material of the ejector block is wood or a polyurethane PU pad, and the position is between the telescopic baffle and the pressing piece of the mounting bolt; In step (3), when drilling, for battery cell pressure strips of different widths, the positioning baffle, positioning platform and fence boss can be detached or glued with composite material blocks to widen them; for different types of products, the product profile can be fixed by adjusting the position of the ejector block or the positioning hole of the drilling tool can be re-drilled.

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