Metal elastic sheet material belt and stamping die for preparing metal elastic sheet material belt

Abstract

The invention discloses a metal elastic piece material strap and a stamping die used for preparing the metal elastic piece material strap, the metal elastic piece material strap comprises an elastic piece body part and a material frame part, and the elastic piece body part is provided with a plurality of metal elastic pieces arranged in the extending direction of the metal elastic piece material strap. The material frame part is provided with a plurality of positioning holes which are arranged along the extension direction of the metal elastic sheet material belt; the material frame part is arranged opposite to the elastic piece body part in the direction perpendicular to the extending direction of the metal elastic piece material belt, and a plurality of easily-broken connecting pieces are connected between the material frame part and the elastic piece body part. According to the technical scheme, the efficiency of the machining process can be effectively improved and the consistency of the product quality can be ensured while high-quality welding connection of the metal elastic sheet material belt is ensured.

Description

Technical Field

[0001] This application relates to the field of metal spring technology, and more particularly to a metal spring strip and a stamping die for preparing the metal spring strip. Background Technology

[0002] Currently, in the interfaces of high-frequency modules (such as Bluetooth modules, RF power amplifier modules, and smart network card modules) in devices like computers, routers, and communication equipment, a continuous electromagnetic shielding cavity is typically formed inside the interface to prevent signal interference and leakage. This electromagnetic shielding cavity is generally achieved by soldering multiple miniature metal springs to a frame located inside the corresponding interface. These miniature metal springs then make close contact with the grounding copper foil on the motherboard of the corresponding high-frequency module, forming a continuous electromagnetic shielding cavity. In related technologies, the metal spring strip is usually cut to the appropriate size to produce a corresponding number of miniature metal springs, and then directly soldered to the corresponding side of the frame. However, in practice, it has been found that due to the thin and small size of the products, it is difficult to accurately control the solder position during surface soldering to the frame, resulting in low processing efficiency and inconsistent finished product quality. Summary of the Invention

[0003] The purpose of this application is to provide a metal spring strip and a stamping die for preparing the metal spring strip, in order to improve the problem that existing metal spring strips are difficult to control accurately when they are surface-mounted with the frame due to their thin and small size, resulting in low processing efficiency and unstable finished product quality.

[0004] To achieve this objective, embodiments of this application provide a metal spring strip, which includes a spring body and a frame. The spring body is provided with a plurality of miniature metal springs arranged along the extension direction of the metal spring strip. The frame is provided with a plurality of positioning holes arranged along the extension direction of the metal spring strip. The frame is disposed opposite to the spring body in a direction perpendicular to the extension direction of the metal spring strip, and a plurality of easily breakable connectors are connected between the frame and the spring body.

[0005] Optionally, in some embodiments of this application, the spring body includes a spring connector and a plurality of micro metal springs, the plurality of micro metal springs being arranged at intervals along the extension direction of the metal spring strip; the spring connector extends along the extension direction of the metal spring strip and sequentially connects one end of each of the micro metal springs together.

[0006] Optionally, in some embodiments of this application, the spring connector is provided with a connection position between any two adjacent micro metal springs, one end of each of the easily broken connectors is connected to a connection position, and a pre-breakage process cut is provided at the connection point. Furthermore, to achieve this objective, embodiments of this application also provide a stamping die for preparing the metal spring strip material according to any of the above claims, the stamping die comprising a first stamping portion and a second stamping portion that are movably disposed relative to each other, wherein, The first stamping part has a material guiding passage area on one side surface facing the second stamping part. The material guiding passage area is provided with a positioning hole stamping groove, a stripping hole stamping groove, a first forming stamping groove, a second forming stamping groove and a cutting stamping groove in sequence along its extension direction. The second stamping part has a first stamping post, a second stamping post, a third stamping post, a fourth stamping post, and a cutting stamping post sequentially protruding from one side surface facing the first stamping part. The first stamping post is configured to cooperate with the positioning hole stamping groove to complete the positioning hole stamping operation of the material strip to be stamped when it moves along the material guide passage area to above the positioning hole stamping groove. The second stamping post is configured to cooperate with the stripping hole stamping groove to complete the stripping hole stamping operation of the material strip to be stamped when it moves along the material guide passage area to above the stripping hole stamping groove. The third stamping post... The first forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the first forming stamping groove. The second forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the second forming stamping groove. The third forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the second forming stamping groove. The fourth forming stamping column is configured to perform a second forming stamping operation on the strip to be stamped when it moves along the material guide area to above the cut-off stamping groove.

[0007] Optionally, in some embodiments of this application, two guide plates are provided on one side surface of the first stamping part facing the second stamping part. Both guide plates extend along the extension direction of the material passing area and are arranged opposite to each other on both sides of the material passing area, so as to limit and guide the material strip to be stamped when it moves along the material passing area.

[0008] Optionally, in some embodiments of this application, the material guiding passage area is further provided with a semi-cut stamping groove, the semi-cut stamping groove being located between the stripping hole stamping groove and the first forming stamping groove; a fifth stamping post is also protruding from the side surface of the second stamping part facing the first stamping part, the fifth stamping post being configured to cooperate with the semi-cut stamping groove to complete the semi-cut stamping operation of the material strip to be stamped when the strip to be stamped moves along the material guiding passage area to above the semi-cut stamping groove.

[0009] Optionally, in some embodiments of this application, the material guiding passage area is further provided with a pitch stamping groove, the pitch stamping groove being located between the half-cut stamping groove and the first forming stamping groove; the second stamping part is further provided with a sixth stamping post on the side surface facing the first stamping part, the sixth stamping post being configured to cooperate with the pitch stamping groove to complete the pitch stamping operation of the material strip to be stamped when the strip to be stamped moves along the material guiding passage area to above the pitch stamping groove.

[0010] Optionally, in some embodiments of this application, the second stamping part is further provided with a plurality of positioning posts on one side surface facing the first stamping part. Each positioning post is configured to assist in positioning the material strip to be stamped in the material guide passage area by passing through a positioning hole punched on the material strip to be stamped.

[0011] Optionally, in some embodiments of this application, the second stamping part has a plurality of elastic connectors built in, and the plurality of elastic connectors are configured to make the side surface of the second stamping part facing the first stamping part elastically floating.

[0012] Optionally, in some embodiments of this application, the second stamping part is recessed on one side surface facing the first stamping part, and the first end of the cutting stamping column is movably installed in the cutting component mounting groove; The side wall of the cutting component mounting groove, near the bottom of the groove, is further provided with a slider mounting groove. The stamping die also includes a punching length control module, which includes a side-push slider, a side-push cylinder, and a punching length monitoring unit. The side push slider is movably installed in the slider mounting groove, and the side push slider is configured to extend into the cutting part mounting groove to abut against the first end of the cutting stamping column, so that the second end of the cutting stamping column protrudes from the side surface of the second stamping part facing the first stamping part. The side-push cylinder is connected to the side-push slider for driving, and the side-push cylinder is configured to drive the side-push slider to extend into the cutting component mounting slot or retract from the cutting component mounting slot. The punching length monitoring unit is electrically connected to the control valve of the side-push cylinder, and the punching length monitoring unit is configured to monitor the punching length of the strip to be punched, so as to control the operation of the side-push cylinder according to the punching length.

[0013] The technical solution provided in this application, through the aforementioned structural configuration, not only adds a frame portion with multiple positioning holes opposite to the spring body portion, but also achieves connection between the frame portion and the spring body portion through multiple easily breakable connectors. Thus, when it is necessary to perform surface welding connection between the metal spring strip and the corresponding side of the frame, the corresponding positioning engagement between the multiple positioning holes of the frame portion and the multiple positioning protrusions on the positioning mold can assist in positioning and fixing the metal spring strip on the corresponding side of the frame. This allows for precise control of the corresponding welding position during the welding process, significantly simplifying the welding operation, improving processing efficiency, and ensuring stable welding quality of the finished product. Furthermore, after welding, the easily breakable characteristics of the connectors allow the frame portion to be easily broken off from the spring body portion. Therefore, this technical solution can effectively improve processing efficiency and ensure product quality consistency while ensuring high-quality welding connection of the metal spring strip. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0015] Figure 1 This is a schematic diagram of the structure of the metal spring strip in an embodiment of this application; Figure 2 for Figure 1 A partial enlarged structural diagram of the metal spring strip shown; Figure 3 for Figure 1 The diagram shown illustrates the usage status of the metal spring strip. Figure 4This is a schematic diagram of the structure of the stamping die according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first stamping part of the stamping die according to an embodiment of this application; Figure 6 for Figure 5 The diagram shows a top view of the second stamping section. Figure 7 for Figure 6 The diagram shows a partial enlarged view of the second stamping section (II). Figure 8 This is a schematic diagram of the structure of the second stamping part of the stamping die according to an embodiment of this application; Figure 9 for Figure 8 A partial enlarged structural diagram of the second stamping section III is shown; Figure 10 for Figure 8 The diagram shows a cross-sectional view of the second stamping section.

[0016] Figure label: 10. Metal spring strip; 11. Spring body; 111. Miniature metal spring; 112. Spring connector; 12. Material frame; 121. Positioning hole; 122. Pitch opening; 13. Easily breakable connector; 131. Pre-break process notch; 20. Frame; 30. Positioning die; 31. Positioning protrusion; 40. Stamping die; 41. First stamping section; 411. Material guide passage area; 412. Positioning hole stamping groove; 413. Stripping hole stamping groove; 414. First forming stamping groove; 415. Second forming stamping groove; 416, cutting stamping groove; 417, guide plate; 418, half-cut stamping groove; 419, pitch stamping groove; 42, second stamping part; 421, first stamping column; 422, second stamping column; 423, third stamping column; 424, fourth stamping column; 425, cutting stamping column; 426, fifth stamping column; 427, sixth stamping column; 428, positioning column; 43, punching length control module; 431, side push slider; 432, side push cylinder; 50, strip to be stamped. Detailed Implementation

[0017] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0019] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Please see Figures 1 to 3 As shown, in one embodiment, this application provides a metal spring strip 10, which includes a spring body portion 11 and a frame portion 12. The spring body portion 11 is provided with a plurality of miniature metal springs 111 arranged along the extension direction of the metal spring strip 10. The frame portion 12 has a plurality of positioning holes 121 arranged along the extension direction of the metal spring strip 10. The frame portion 12 is disposed opposite to the spring body portion 11 in a direction perpendicular to the extension direction of the metal spring strip 10, and a plurality of easily breakable connectors 13 are connected between the frame portion 12 and the spring body portion 11.

[0021] It should be noted that the metal spring strip 10 in this embodiment is mainly used in the interfaces of high-frequency modules (such as Bluetooth modules, RF power amplifier modules, and smart network card modules) in devices such as computers, routers, and communication equipment. It is welded to the inner frame 20 of the corresponding interface to form a continuous electromagnetic shielding cavity inside the corresponding interface, preventing signal interference and leakage. The structure of the aforementioned micro metal spring 111 is basically the same as that of a conventional micro metal spring 111, presenting a sheet shape with multiple bends to give it good elasticity. The aforementioned positioning hole 121 is preferably a round hole or a square hole structure to facilitate its stamping. The aforementioned multiple positioning holes 121 are preferably staggered relative to the multiple micro metal springs 111 in the direction perpendicular to the extension direction of the metal spring strip 10, so that the structure of the frame portion 12 is more balanced, enhancing the overall stability of the metal spring strip 10 and preventing deformation due to stress concentration. The aforementioned easily breakable connector 13 specifically refers to a connector that has been pre-treated with easily breakable creases or cuts, allowing it to be quickly broken when needed, thus enabling rapid separation of the corresponding material frame portion 12 from the spring body portion 11. Additionally, multiple pitch openings 122 can be provided on the side of the material frame portion 12 away from the spring body portion 11. These pitch openings 122 serve as process references for precisely controlling the spacing (i.e., "pitch") between each micro-metal spring 111, ensuring that the position of the product unit remains consistent during continuous stamping or conveying, thereby improving the overall dimensional accuracy and yield rate of production.

[0022] In this way, the metal spring strip 10 provided in this embodiment, through the above-described structural arrangement, not only adds a frame portion 12 opposite to the spring body portion 11 and equipped with multiple positioning holes 121, but also achieves the connection between the frame portion 12 and the spring body portion 11 through multiple easily breakable connectors 13. Thus, when it is necessary to perform surface welding connection between the metal spring strip 10 and the corresponding side of the frame 20, it can be done as follows... Figure 3 As shown, the corresponding positioning engagement between the multiple positioning holes 121 of the material frame 12 and the multiple positioning protrusions 31 on the positioning mold 30 assists in positioning and fixing the metal spring strip 10 on the corresponding side of the frame 20. This allows for precise control of the corresponding welding position during the welding process, significantly simplifying the welding operation, improving processing efficiency, and ensuring stable welding quality of the finished product. Furthermore, after welding, the easily breakable characteristic of the easily breakable connector 13 allows the material frame 12 to be easily broken off from the spring strip body 11. Therefore, this technical solution effectively improves processing efficiency and ensures product quality consistency while ensuring high-quality welding of the metal spring strip 10.

[0023] In some examples, such as Figure 1 and Figure 2 As shown, the spring body 11 includes a spring connector 112 and a plurality of miniature metal springs 111. The plurality of miniature metal springs 111 are arranged at intervals along the extension direction of the metal spring strip 10. The spring connector 112 extends along the extension direction of the metal spring strip 10 and sequentially connects one end of each miniature metal spring 111 together. In this way, through the above structural arrangement, one end of all miniature metal springs 111 can be fixedly connected together by the spring connector 112, so that the multiple thin and small miniature metal springs 111 can be operated stably and efficiently synchronously, preventing the displacement or detachment of individual miniature metal springs 111, providing a unified benchmark and support for subsequent welding processes, simplifying the welding process, and ensuring the consistency of batch products.

[0024] In some examples, such as Figure 1 and Figure 2 As shown, the spring connector 112 has a connection point between any two adjacent miniature metal springs 111. One end of each easily breakable connector 13 is connected to a connection point, and a pre-breakage process cut 131 is provided at each connection point. In this way, the pre-breakage process cut 131 allows each easily breakable connector 13 to be quickly broken when needed, so that the corresponding material frame part 12 can be quickly separated from the spring body part 11.

[0025] In one embodiment, such as Figures 3 to 10As shown in the figure, this application embodiment also provides a stamping die 40 for preparing metal spring strip 10. The stamping die 40 includes a first stamping part 41 and a second stamping part 42 that are movably disposed relative to each other. The first stamping part 41 has a material guiding passage area 411 on its side surface facing the second stamping part 42. The material guiding passage area 411 is provided with a positioning hole stamping groove 412, a stripping hole stamping groove 413, a first forming stamping groove 414, a second forming stamping groove 415 and a cutting stamping groove 416 in sequence along its extension direction. The second stamping part 42 has a first stamping post 421, a second stamping post 422, a third stamping post 423, a fourth stamping post 424 and a cutting stamping post 425 in sequence protruding on its side surface facing the first stamping part 41. The first stamping column 421 is configured to cooperate with the positioning hole stamping groove 412 to complete the stamping operation of the positioning hole 121 of the material strip 50 to be stamped when the material strip 50 to be stamped moves along the material passing area 411 to above the positioning hole stamping groove 412. The second stamping column 422 is configured to cooperate with the stripping hole stamping groove 413 to complete the stripping hole stamping operation of the material strip 50 to be stamped when the material strip 50 to be stamped moves along the material passing area 411 to above the stripping hole stamping groove 413. The third stamping column 423 is configured to cooperate with the first forming stamping groove 414 to complete the first forming stamping operation of the material strip 50 to be stamped when the material strip 50 to be stamped moves along the material passing area 411 to above the first forming stamping groove 414. The fourth stamping column 424 is configured to cooperate with the second forming stamping groove 415 to complete the second forming stamping operation of the material strip 50 to be stamped when the material strip 50 to be stamped moves along the material passing area 411 to above the second forming stamping groove 415. The cutting stamping column 425 is configured to cooperate with the cutting stamping groove to complete the cutting stamping operation of the material strip 50 to be stamped when the material strip 50 to be stamped moves along the material passing area 411 to above the cutting stamping groove.

[0026] It should be noted that the stamping die 40 of this application embodiment is mainly used in the stamping operation of the metal spring strip 10 in the above embodiment. That is, the stamping die 40 can be used to stamp the strip 50 to be stamped, which moves along the guide passage area 411, into the metal spring strip 10 in the above embodiment. The stamping operation of the stamping die 40 is mainly achieved by driving the second stamping part 42 toward the first stamping part 41 through a power mechanism (not shown), so that the side surface of the second stamping part 42 facing the first stamping part 41 is in contact with the side surface of the first stamping part 41 facing the second stamping part 42. To this end, in order to ensure that the relative movement between the first stamping part 41 and the second stamping part 42 can be stable, a guide structure is provided between the first stamping part 41 and the second stamping part 42, which is formed by a plurality of guide posts and a plurality of guide bushings corresponding to each other.

[0027] The aforementioned first stamping post 421, in conjunction with the positioning hole stamping groove 412, completes the stamping operation of the positioning hole 121 of the strip 50 to be stamped. Specifically, this means that the first stamping post 421 and the positioning hole stamping groove 412 can be stamped together to form a corresponding positioning hole 121 on the first side of the strip 50 to be stamped. Furthermore, to improve the stamping efficiency of the positioning hole 121, two first stamping posts 421 and two positioning hole stamping grooves 412 can be provided.

[0028] The aforementioned second stamping column 422, in conjunction with the stripping hole stamping groove 413, completes the stripping hole stamping operation of the strip 50 to be stamped. Specifically, this means that through the stamping cooperation of the second stamping column 422 and the stripping hole stamping groove 413, a corresponding stripping hole is formed on the second side of the strip 50 to be stamped. Through the formation of this stripping hole, a preliminary outline of a micro-metal spring 111 can be formed at a corresponding position on the second side of the strip 50. For this purpose, the surface of the second stamping column 422 is provided with a protrusion that matches the shape of the stripping hole. Furthermore, to improve the stamping efficiency of the stripping hole, two second stamping columns 422 and two stripping hole stamping grooves 413 can be provided.

[0029] The aforementioned third stamping post 423, in conjunction with the first forming stamping groove 414, completes the first forming stamping operation of the strip 50 to be stamped. Specifically, this means that through the stamping cooperation between the third stamping post 423 and the first forming stamping groove 414, the edge of the outline of the micro metal spring 111 formed by the stamping can be bent into multiple segments on the second side of the strip 50 to be stamped. For this purpose, the surface of the second stamping post 422 is provided with protrusions that are adapted to the shape of the multiple bending segments.

[0030] The aforementioned fourth stamping column 424, in conjunction with the second forming stamping groove 415, completes the second forming stamping operation of the strip 50 to be stamped. Specifically, this means that through the stamping cooperation between the fourth stamping column 424 and the second forming stamping groove 415, the connection point of the outline of the micro metal spring 111 formed by the stamping is bent on the second side of the strip 50 to be stamped, so that the outline of the entire micro metal spring 111 is bent at nearly 90 degrees relative to the second side of the strip 50 to be stamped, and the corresponding micro metal spring 111 is finally formed.

[0031] The aforementioned cutting stamping column 425, in conjunction with the cutting stamping groove, completes the cutting and stamping operation of the strip 50 to be stamped. Specifically, it means that the cutting stamping column 425 and the cutting stamping groove can be used to cut the strip 50 at the position where it needs to be cut, so as to obtain the metal spring strip 10 of the required length.

[0032] In addition, the material strip 50 to be stamped moves along the material guide zone 411 mainly under the drive of the external feeding structure.

[0033] In this way, the stamping die 40 provided in this embodiment, through the above-described structural configuration, can sequentially complete multiple key processes (i.e., stamping of positioning holes 121, stamping of stripping holes, two-stage forming, and final cutting) of the metal spring strip 10 in the above embodiment through a single continuous stamping action at a specific moving position of the strip 50 to be stamped, thereby achieving efficient integrated stamping forming of the metal spring strip 10. Thus, this integrated design not only avoids the complexity and accumulated errors of multi-stage processing with multiple dies, significantly improving production efficiency and product dimensional accuracy, but also ensures the forming quality and consistency of complex structures such as the spring body 11, the frame 12, and connecting parts through a precise stamping sequence.

[0034] In some examples, such as Figure 5 , Figure 6 and Figure 7 As shown, two guide plates 417 are provided on the surface of the first stamping part 41 facing the second stamping part 42. Both guide plates 417 extend along the extending direction of the material passing area 411, and are arranged opposite each other on both sides of the material passing area 411 to limit and guide the material strip 50 to be stamped as it moves along the material passing area 411. Thus, with the above structural arrangement, when the material strip 50 to be stamped moves along the material passing area 411 under the drive of an external power structure, it can move precisely along the material passing area 411 without deviation, under the position limit of the two guide plates 417.

[0035] In some examples, such as Figures 5 to 9 As shown, the material guiding area 411 is also provided with a semi-cut stamping groove 418, which is located between the stripping hole stamping groove 413 and the first forming stamping groove 414. A fifth stamping post 426 protrudes from the side of the second stamping part 42 facing the first stamping part 41. The fifth stamping post 426 is configured to cooperate with the semi-cut stamping groove 418 to complete the semi-cut stamping operation of the material strip 50 when it moves along the material guiding area 411 to above the semi-cut stamping groove 418. Thus, by adding a fifth stamping post 426 within the semi-cut stamping groove 418 to perform the semi-cut stamping operation, the stamping depth can be precisely controlled, allowing the material strip 50 to form a weak structure with partially cut thickness, as required for the "easily broken connector 13". This lays the foundation for easy separation of the material frame part 12 during subsequent product use. In addition, by placing the semi-part stamping process between the stripping and forming processes, stress interference that may occur when the connecting parts are stamped after the spring body is formed can be effectively avoided, ensuring that the final shape accuracy and performance of the spring body are not affected.

[0036] In some examples, such as Figures 5 to 9As shown, the material guiding area 411 is also provided with a pitch stamping groove 419, which is located between the half-cut stamping groove 418 and the first forming stamping groove 414. A sixth stamping post 427 protrudes from the side of the second stamping part 42 facing the first stamping part 41. The sixth stamping post 427 is configured to cooperate with the pitch stamping groove 419 to complete the pitch stamping operation of the material strip 50 to be stamped when it moves along the material guiding area 411 to above the pitch stamping groove 419. Thus, by adding a pitch stamping operation before the forming process, the pitch opening 122 can be accurately punched out in the material frame part 12, providing a precise positioning and conveying reference for the material strip 50 to be stamped. Furthermore, forming the pitch opening 122 through an independent stamping station avoids stress concentration during forming or cutting, thus improving the overall dimensional stability of the material strip and the product yield.

[0037] In some examples, such as Figure 8 and Figure 9 As shown, the second stamping part 42 has multiple positioning posts 428 protruding from its surface facing the first stamping part 41. Each positioning post 428 is configured to assist in positioning the strip 50 on the material guide passage area 411 by passing through a positioning hole 121 pre-stamped on the strip 50 to be stamped. Thus, this structural arrangement enables precise positioning and anti-deviation of the strip 50 as it moves between stamping stations, ensuring that the stamping positions of subsequent processes such as the stripping hole and forming groove are strictly aligned with the initial positioning hole 121. Furthermore, it fundamentally eliminates misalignment problems caused by strip slippage or accumulated errors, guaranteeing high precision and consistency of product dimensions during continuous stamping, thereby significantly improving the yield rate.

[0038] In some examples, the second stamping part 42 incorporates multiple elastic connectors (not shown), which are configured to make the surface of the second stamping part 42 facing the first stamping part 41 elastically floating. Thus, by configuring the surfaces of the second stamping part 42 and the first stamping part 41 opposite each other using the built-in elastic connectors, the floating structure can automatically compensate for pressure deviations caused by uneven thickness or slight unevenness of the material strip 50 to be stamped, ensuring uniform contact pressure between each stamping post and the stamping groove. This avoids local over-stamping or under-stamping, improving the consistency of stamping depth. Furthermore, this elastic design can effectively absorb the impact force during stamping, reducing damage to the die itself and the material strip 50 from rigid collisions, helping to extend die life and protect the delicate structure of the formed spring sheet.

[0039] In some examples, such as Figure 8 , Figure 9 and Figure 10As shown, the second stamping part 42 has a recessed cutting part mounting groove on its side surface facing the first stamping part 41, and the first end of the cutting stamping column 425 is movably mounted in the cutting part mounting groove. A slider mounting groove is also provided on the side wall of the cutting part mounting groove near the bottom of the groove. The stamping die 40 also includes a cutting length control module 43, which includes a side-push slider 431, a side-push cylinder 432, and a cutting length monitoring unit. The side-push slider 431 is movably mounted in the slider mounting groove and is configured to extend into the cutting part mounting groove to abut against the first end of the cutting stamping column 425, causing the second end of the cutting stamping column 425 to protrude from the side surface of the second stamping part 42 facing the first stamping part 41. The side-push cylinder 432 is driven by the side-push slider 431 and is configured to drive the side-push slider 431 to extend into or retract from the cutting part mounting groove. The punching length monitoring unit is electrically connected to the control valve of the side-push cylinder 432, and the punching length monitoring unit is set to monitor the punching length of the strip 50 to be punched, so as to control the operation of the side-push cylinder 432 according to the punching length. In this way, through the above structural setting, the effective extension length of the cutting stamping column 425 can be adjusted in real time by the precise drive of the side-push slider 431 and the side-push cylinder 432. Only when the second end of the cutting stamping column 425 protrudes from the side surface of the second stamping part 42 facing the first stamping part 41 can the cutting stamping column 425 cooperate with the cutting stamping groove to complete the cutting stamping operation of the strip 50 to be punched. Therefore, by precisely controlling the side-push cylinder 432 through the punching length monitoring unit, the punching length of the strip 50 to be punched can be dynamically adjusted, so that it can punch out metal spring strips 10 of arbitrary length according to actual needs, thereby greatly improving the flexibility of this stamping die 40 and its adaptability to different product specifications.

[0040] Furthermore, since the punching length monitoring unit and the side-push cylinder 432 can form a closed-loop control, the precise controllability of the cutting position is ensured. This fundamentally avoids material waste or product dimensional deviations caused by a fixed punching length, significantly improving material utilization and product dimensional accuracy. In addition, by directly integrating the punching length control module 43 into the stamping die 40, this example also achieves the goal of sharing the die and saving on die development costs.

[0041] It should be noted that the punching length monitoring unit in this example can be implemented using a counting solenoid valve in conjunction with a high-precision displacement sensor or rotary encoder. A high-precision displacement sensor or rotary encoder is installed on the material conveying path (i.e., the material guide zone 411) to monitor the actual conveying length of the material strip 50 to be punched in real time and convert the length signal into electrical pulse signals. These pulse signals are sent to the counter of the counting solenoid valve, which is preset with a count value based on the standard pitch of the product design (i.e., the theoretical length of each product unit). When the cumulative number of pulses generated by the conveying material strip reaches the preset value, the counter determines that the material strip has moved one "punching length" unit. At this time, the counter sends a trigger signal to the counting solenoid valve. Upon receiving this signal, the counting solenoid valve precisely controls the side-push cylinder 432 to perform a complete "extend-retract" action cycle, thereby driving the side-push slider 431 to adjust the extension amount of the cutting punching column 425, completing a punching operation synchronized with the material strip feed length and with an adjustable position.

[0042] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A metal spring strip, characterized in that, The metal spring strip includes a spring body and a frame. The spring body is provided with a plurality of miniature metal springs arranged along the extension direction of the metal spring strip. The frame is provided with a plurality of positioning holes arranged along the extension direction of the metal spring strip. The frame is positioned opposite to the spring body in a direction perpendicular to the extension direction of the metal spring strip, and a plurality of easily breakable connectors are connected between the frame and the spring body.

2. The metal spring strip according to claim 1, characterized in that, The spring body includes a spring connector and a plurality of miniature metal springs, which are arranged at intervals along the extension direction of the metal spring strip. The spring connector extends along the extension direction of the metal spring strip and connects one end of each miniature metal spring together in sequence.

3. The metal spring strip according to claim 2, characterized in that, Each of the spring clip connectors has a connection point between any two adjacent miniature metal spring clips. One end of each of the easily broken connectors is connected to one of the connection points, and a pre-breakage process cut is provided at the connection point.

4. A stamping die for preparing the metal spring strip as described in any one of claims 1-3, characterized in that, The stamping die includes a first stamping section and a second stamping section that are relatively movable together, wherein... The first stamping part has a material guiding passage area on one side surface facing the second stamping part. The material guiding passage area is provided with a positioning hole stamping groove, a stripping hole stamping groove, a first forming stamping groove, a second forming stamping groove and a cutting stamping groove in sequence along its extension direction. The second stamping part has a first stamping post, a second stamping post, a third stamping post, a fourth stamping post, and a cutting stamping post sequentially protruding from one side surface facing the first stamping part. The first stamping post is configured to cooperate with the positioning hole stamping groove to complete the positioning hole stamping operation of the material strip to be stamped when it moves along the material guide passage area to above the positioning hole stamping groove. The second stamping post is configured to cooperate with the stripping hole stamping groove to complete the stripping hole stamping operation of the material strip to be stamped when it moves along the material guide passage area to above the stripping hole stamping groove. The third stamping post... The first forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the first forming stamping groove. The second forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the second forming stamping groove. The third forming stamping operation is performed on the strip to be stamped when it moves along the material guide area to above the second forming stamping groove. The fourth forming stamping column is configured to perform a second forming stamping operation on the strip to be stamped when it moves along the material guide area to above the cut-off stamping groove.

5. The stamping die according to claim 4, characterized in that, Two guide plates are provided on the side surface of the first stamping part facing the second stamping part. Both guide plates extend along the extension direction of the material passing area and are arranged opposite to each other on both sides of the material passing area to limit and guide the material strip to be stamped when it moves along the material passing area.

6. The stamping die according to claim 4, characterized in that, The material guiding passage area is also provided with a semi-cut stamping groove, which is located between the stripping hole stamping groove and the first forming stamping groove; the second stamping part is also provided with a fifth stamping column on the side surface facing the first stamping part. The fifth stamping column is configured to cooperate with the semi-cut stamping groove to complete the semi-cut stamping operation of the material strip to be stamped when the strip to be stamped moves along the material guiding passage area to the top of the semi-cut stamping groove.

7. The stamping die according to claim 6, characterized in that, The material guiding passage area is also provided with a pitch stamping groove, which is located between the half-section stamping groove and the first forming stamping groove; the second stamping part is also provided with a sixth stamping post on the side surface facing the first stamping part. The sixth stamping post is configured to cooperate with the pitch stamping groove to complete the pitch stamping operation of the material strip to be stamped when the strip to be stamped moves along the material guiding passage area to the top of the pitch stamping groove.

8. The stamping die according to claim 4, characterized in that, The second stamping part has a plurality of positioning posts protruding on the side surface facing the first stamping part. Each positioning post is configured to assist the positioning of the material strip to be stamped in the material guide passage area by passing through a positioning hole punched on the material strip to be stamped.

9. The stamping die according to claim 4, characterized in that, The second stamping part has a plurality of elastic connectors built in, and the plurality of elastic connectors are configured to make the side surface of the second stamping part facing the first stamping part elastically floating.

10. The stamping die according to any one of claims 4-9, characterized in that, The second stamping part has a cutting element mounting groove recessed on the side surface facing the first stamping part, and the first end of the cutting stamping column is movably installed in the cutting element mounting groove; The side wall of the cutting component mounting groove, near the bottom of the groove, is further provided with a slider mounting groove. The stamping die also includes a punching length control module, which includes a side-push slider, a side-push cylinder, and a punching length monitoring unit. The side push slider is movably installed in the slider mounting groove, and the side push slider is configured to extend into the cutting part mounting groove to abut against the first end of the cutting stamping column, so that the second end of the cutting stamping column protrudes from the side surface of the second stamping part facing the first stamping part. The side-push cylinder is connected to the side-push slider for driving, and the side-push cylinder is configured to drive the side-push slider to extend into the cutting component mounting slot or retract from the cutting component mounting slot. The punching length monitoring unit is electrically connected to the control valve of the side-push cylinder, and the punching length monitoring unit is configured to monitor the punching length of the strip to be punched, so as to control the operation of the side-push cylinder according to the punching length.

Images