A quick die changing positioning mechanism for a micro metal sheet stamping die

Abstract

The utility model relates to fine spare part machining equipment technical field, concretely refers to a quick die changing positioning mechanism of miniature sheet metal stamping die, including installation base, stamping die and positioning mechanism, installation base top has opened a plurality of slide grooves, and the mutual parallelism between slide grooves, stamping die is detachably arranged on installation base, and the bottom of stamping die is fixedly connected with a plurality of guide rails, and the guide rail is connected with slide groove slidingly, positioning mechanism is provided with a plurality of groups, and two groups of positioning mechanisms are symmetrically arranged on each guide rail, and the positioning mechanism and slide groove are mutually clamped for the positioning of stamping die, and each positioning mechanism includes positioning block, linkage rod, reset component, adjusting rod, slider assembly and clamping assembly. The utility model through the cooperation and setting between installation base, positioning mechanism and stamping die, not only can realize the quick die changing positioning of mould, but also greatly reduces the occurrence of the situation that the machining accuracy is influenced due to the deviation of stamping die position.

Description

Technical Field

[0001] This utility model relates to the field of precision parts processing equipment, specifically to a quick mold changing and positioning mechanism for a micro metal sheet stamping die. Background Technology

[0002] Stamping dies are core equipment in sheet metal stamping and blanking processes, widely used in the production of precision parts such as miniature metal sheets. They typically consist of an upper die and a lower die, forming the sheet metal through the die cavity and separating or cutting it using a cutting edge. In the mass production of miniature metal sheets, stamping dies need to be frequently changed according to different product specifications; therefore, the die-changing efficiency and positioning accuracy directly affect production efficiency and product quality.

[0003] Chinese patent CN206677057U discloses a quick-positioning and conversion mechanism for stamping dies, which uses a positioning bolt and elastic pin positioning structure. The die is fixed by rotating the positioning bolt with a special wrench. This technical solution has two key problems: First, the die-changing process relies on adjusting the bolt with a tool, making the operation cumbersome and unable to achieve rapid die changing. Especially in the scenario of multi-specification, small-batch production of micro-metal sheets, frequent tool operations will significantly reduce production efficiency. Second, after long-term use, the positioning bolt is prone to loosening due to vibration, causing the die position to shift. Micro-metal sheets have extremely high processing precision requirements; even a slight positional shift can cause product dimensional deviations and increased scrap rates, making it difficult to meet precision machining needs. Some existing die-changing mechanisms use a single station or a simple sliding structure, lacking stable positioning and locking components. The die installation requires repeated position calibration, further extending the die-changing time. At the same time, the mating parts of the guide rail and sliding groove are prone to wear due to long-term sliding, leading to increased clearance, gradually decreasing positioning accuracy, and shortening the overall service life of the mechanism. Therefore, there is an urgent need for a quick mold changing positioning mechanism that requires no tools, provides stable positioning, and is wear-resistant and durable, in order to solve the problems of low mold changing efficiency, poor positioning accuracy, and easy wear in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a quick mold changing and positioning mechanism for a micro metal sheet stamping die that requires no tool assistance, has stable positioning, and is wear-resistant and durable, in order to solve the problems of low mold changing efficiency, poor positioning accuracy, and easy wear in the prior art.

[0005] This utility model is achieved through the following technical solution: a quick mold changing and positioning mechanism for a micro metal sheet stamping die, comprising: The mounting base has multiple sliding grooves on its top, and the sliding grooves are parallel to each other. A stamping die is detachably mounted on the mounting base. Multiple guide rails are fixedly connected to the bottom of the stamping die. The guide rails slide in conjunction with the sliding groove to achieve the translational installation of the stamping die. The positioning mechanism is provided in multiple sets. Two sets of the positioning mechanism are symmetrically arranged on each guide rail along its length direction. The positioning mechanism is engaged with the sliding groove to realize the positioning and fixing of the stamping die on the mounting base. Each positioning mechanism includes a positioning block, a linkage rod, a reset assembly, an adjusting rod, a slider assembly, and a locking assembly. The bottom of the guide rail has a movable groove for the positioning block to slide up and down. The positioning block is slidably disposed within the movable groove. One end of the linkage rod is fixedly connected to the top of the positioning block, and the other end of the linkage rod extends vertically through the guide rail to the outside of the guide rail. One end of the reset assembly is fixedly connected to the outer wall of the guide rail, and the other end of the reset assembly is fixedly connected to the outer wall of the linkage rod to drive the positioning block to reset. One end of the adjusting rod is rotatably connected to the side wall of the stamping die. The linkage rod is connected to the adjusting rod via the slider assembly to enable the adjusting rod to drive the linkage rod to rise and fall. The locking assembly is disposed on the adjusting rod and cooperates with the guide rail to limit the rotational position of the adjusting rod.

[0006] The working principle of this technical solution is as follows: the sliding fit structure between the guide rail and the sliding groove in the mounting base enables the translational installation foundation of the stamping die; with the help of multiple symmetrically arranged positioning mechanisms, the transmission relationship between the adjusting rod and the slider assembly drives the linkage rod and the positioning block to move. Combined with the locking function of the snap-fit ​​assembly and the reset function of the reset assembly, the stamping die is finally detachably and precisely positioned on the mounting base, solving the problem of low mold changing efficiency in traditional molds.

[0007] To better realize this utility model, the surface of the mounting base and the bottom of the sliding groove are provided with a positioning hole that matches the positioning block. The positioning block can be inserted into the positioning hole to realize the snap-fit ​​positioning of the guide rail and the mounting base.

[0008] To better realize this utility model, the reset assembly further includes a mounting ring and a reset spring; the mounting ring is fixedly sleeved on the outer wall of the linkage rod and located outside the guide rail, one end of the reset spring is fixedly connected to the side of the mounting ring away from the guide rail, the other end of the reset spring is fixedly connected to the outer wall of the guide rail, and the reset spring is always in a stretched state to apply a pulling force toward the guide rail to the linkage rod.

[0009] To better realize this utility model, the slider assembly further includes a slide rail, a slider, and a limiting block; the slide rail is fixedly connected to the side wall of the adjusting rod along the length direction of the adjusting rod, the slider slides in cooperation with the slide rail, the side of the slider away from the slide rail is rotatably connected to the end of the linkage rod extending to the outside of the guide rail, and the limiting block is fixedly connected to both ends of the slide rail to limit the sliding limit position of the slider on the slide rail to prevent the slider from disengaging from the slide rail.

[0010] To better realize this utility model, the snap-fit ​​assembly further includes a fixing plate, a contact spring, a sliding sleeve, and a snap-fit ​​rack; the fixing plate is fixedly connected to the side wall of the adjusting rod and close to the stamping die; the sliding sleeve is movably sleeved on the surface of the adjusting rod and slides along the axial direction of the adjusting rod; the snap-fit ​​rack is fixedly connected to the side of the sliding sleeve close to the guide rail; the contact spring is sleeved on the outside of the adjusting rod, and one end of the contact spring is fixedly connected to the side of the fixing plate away from the stamping die, and the other end of the contact spring is fixedly connected to the side of the snap-fit ​​rack away from the guide rail; the side wall of the guide rail is provided with toothed grooves that mesh with the snap-fit ​​rack, and the snap-fit ​​rack can be inserted into the toothed grooves to limit the rotation angle of the adjusting rod.

[0011] To better realize this utility model, further, a bearing plate is fixedly connected to both sides of the mounting base, and a sliding groove is opened on the top of the bearing plate. The sliding groove is connected to the end of the sliding groove, and the width and depth of the sliding groove are the same as those of the sliding groove, so that the guide rail can slide into the sliding groove from the side of the bearing plate.

[0012] To better realize this utility model, the top two sides of the stamping die are fixedly connected with handles, and the outer wall of the handle is covered with an anti-slip rubber sleeve, and the surface of the anti-slip rubber sleeve is provided with a diamond-shaped anti-slip texture.

[0013] To better realize this utility model, a wear-resistant coating is further provided between the inner wall of the sliding groove and the outer wall of the guide rail, and the wear-resistant coating is a tungsten steel coating.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model uses a transmission structure in conjunction with the elastic locking function of the snap-fit ​​component. When changing the mold, it is only necessary to slide the sliding sleeve to release the engagement between the snap-fit ​​rack and the tooth groove. Rotating the adjusting rod can drive the positioning block to disengage from the positioning hole, and the stamping mold can be directly pulled out to complete the disassembly. When installing, push the mold to make the guide rail into place along the sliding groove, and then rotate the adjusting rod in the opposite direction to realize the automatic snap-fit ​​of the positioning block. No special tools are required throughout the process, which is especially suitable for the frequent mold changing needs of multi-specification production of micro metal sheets. (2) This utility model uses multiple symmetrically arranged positioning mechanisms, combined with the precise matching of positioning blocks and positioning holes, to limit the mold position in both horizontal and vertical directions, thus avoiding deviation caused by stamping vibration; on the other hand, the spring in the snap-fit ​​assembly continuously pushes the snap-fit ​​rack and tooth groove to mesh, forming an irreversible locking structure, effectively preventing the adjusting rod from loosening and ensuring stable positioning. (3) In this utility model, the bearing plates on both sides of the mounting base and the slide groove form a side sliding path, and the mold can slide smoothly into the slide groove from the side without reserving end operation space, which is suitable for narrow working environment; the handle on the top of the stamping mold and the anti-slip rubber sleeve with diamond pattern increase the grip friction of the hand to avoid slipping, and at the same time avoid direct contact with the mold processing surface to prevent contamination. (4) The guide rail and sliding groove of this utility model can be adapted to the size of micro metal sheet stamping dies of different specifications. Only the guide rail spacing and positioning hole position need to be adjusted to adapt to various mold models without replacing the entire mounting base. At the same time, the parameters such as the length of the adjusting rod and the spring force of the reset spring of the positioning mechanism can be flexibly adjusted to meet the positioning requirements of molds of different weights. It is suitable for micro metal sheet stamping production in the fields of electronic components and precision instruments, and has a wide range of industrial application value. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the mounting base in this utility model; Figure 3 This is a schematic diagram of the internal structure of the guide rail in this utility model; Figure 4 This is a schematic diagram of the internal structure of the positioning mechanism in this utility model.

[0016] Wherein: 1—mounting base, 2—sliding groove, 3—stamping die, 41—positioning block, 42—linkage rod, 431—mounting ring, 432—reset spring, 441—fixed plate, 442—fitting spring, 443—sliding sleeve, 444—clamping rack, 445—tooth groove, 451—slide rail, 452—slider, 453—limiting block, 46—adjusting rod, 47—positioning hole, 5—guide rail, 6—bearing plate, 7—sliding groove, 8—movable groove. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example 1: The main structure of this embodiment is as follows: Figures 1-4 As shown, it includes: The mounting base 1 has multiple sliding grooves 2 on its top, and the sliding grooves 2 are parallel to each other. The stamping die 3 is detachably mounted on the mounting base 1. Multiple guide rails 5 are fixedly connected to the bottom of the stamping die 3. The guide rails 5 slide in cooperation with the sliding groove 2 to realize the translational installation of the stamping die 3. The positioning mechanism is provided in multiple sets. Two sets of the positioning mechanism are symmetrically arranged on each guide rail 5 along its length direction. The positioning mechanism is engaged with the sliding groove 2 to realize the positioning and fixing of the stamping die 3 on the mounting base 1. Each positioning mechanism includes a positioning block 41, a linkage rod 42, a reset assembly, an adjusting rod 46, a slider assembly, and a locking assembly. The bottom of the guide rail 5 has a movable groove 8 for the positioning block 41 to slide up and down. The positioning block 41 is slidably disposed within the movable groove 8. One end of the linkage rod 42 is fixedly connected to the top of the positioning block 41, and the other end of the linkage rod 42 extends vertically through the guide rail 5 and to the outside of the guide rail 5. One end of the reset assembly is fixedly connected to the outer wall of the guide rail 5, and the other end of the reset assembly is fixedly connected to the outer wall of the linkage rod 42 to drive the positioning block 41 to reset. One end of the adjusting rod 46 is rotatably connected to the side wall of the stamping die 3. The linkage rod 42 is connected to the adjusting rod 46 via the slider assembly to achieve the adjustment rod 46 driving the linkage rod 42 to rise and fall. The locking assembly is disposed on the adjusting rod 46 and cooperates with the guide rail 5 to limit the rotational position of the adjusting rod 46.

[0021] The specific implementation process is as follows: Align the guide rail 5 at the bottom of the stamping die 3 with the sliding groove 2 at the top of the mounting base 1, ensuring that the guide rail 5 and the groove opening of the sliding groove 2 are aligned. At this time, the positioning block 41 in the positioning mechanism is housed in the movable groove 8 at the bottom of the guide rail 5 under the pulling force of the reset component, avoiding obstruction of the sliding of the guide rail 5. Push the stamping die 3 to make the guide rail 5 move along the length direction of the sliding groove 2 until the stamping die 3 reaches the preset processing position. At this time, the guide rail 5 is fully embedded in the sliding groove 2, and the movable groove 8 and the positioning hole 47 in the sliding groove 2 are initially aligned. Manually rotate the adjusting rod 46. One end of the adjusting rod 46 is rotatably connected to the side wall of the stamping die 3. The adjusting rod 46 drives the linkage rod 42 to move downward in the vertical direction through the slider assembly, the slide rail 451 and the slider 452 slidingly engaged. The linkage rod 42 pushes the positioning block 41 to slide out from the movable groove 8 and insert into the positioning hole 47 in the sliding groove 2 to complete the initial positioning. At the same time, the locking assembly cooperates with the side wall of the guide rail 5 to limit the rotation position of the adjusting rod 46 and prevent the adjusting rod 46 from loosening and causing the positioning block 41 to disengage from the positioning hole 47.

[0022] When it is necessary to disassemble the stamping die 3, the locking component is released from the locking of the adjusting rod 46, and the reset spring 432 of the reset component applies a pulling force to the linkage rod 42 toward the guide rail 5, which drives the linkage rod 42 and the positioning block 41 to move upward, and the positioning block 41 is retracted into the movable groove 8; then the stamping die 3 is pushed in the opposite direction, so that the guide rail 5 slides out along the sliding groove 2, and the disassembly of the stamping die 3 is completed.

[0023] Example 2: This embodiment, based on the above embodiments, further defines the structure of the positioning mechanism, such as... Figure 3 ,of Figure 4As shown, a positioning hole 47, adapted to the positioning block 41, is provided on the surface of the mounting base 1 and at the bottom of the sliding groove 2. The positioning block 41 can be inserted into the positioning hole 47 to achieve the snap-fit ​​positioning of the guide rail 5 and the mounting base 1. By providing a positioning hole 47 adapted to the positioning block 41 at the bottom of the sliding groove 2 of the mounting base 1, a rigid snap-fit ​​structure is established. Utilizing the precise fit between the positioning block 41 and the positioning hole 47, the horizontal and vertical displacement of the guide rail 5 within the sliding groove 2 is further limited, preventing the stamping die 3 from shifting position due to vibration during processing and improving positioning accuracy.

[0024] The specific implementation process is as follows: When pushing the stamping die 3 to move the guide rail 5 along the sliding groove 2, observe the position of the movable groove 8 at the bottom of the guide rail 5 and the positioning hole 47 at the bottom of the sliding groove 2 until the two are completely aligned. Alignment can be assisted by the scale marks on the surface of the mounting base 1. Rotate the adjusting rod 46 to drive the linkage rod 42 downward, so that the positioning block 41 slides out of the movable groove 8 and is fully inserted into the positioning hole 47. Since the positioning block 41 is adapted to the positioning hole 47, the outer wall of the positioning block 41 is tightly fitted with the inner wall of the positioning hole 47, which restricts the displacement of the guide rail 5 in the horizontal direction, that is, the length / width direction of the sliding groove 2, and the vertical direction, that is, the up and down direction, so as to achieve precise positioning.

[0025] During mold changing, after the locking component is released, the reset component drives the positioning block 41 to be pulled out of the positioning hole 47 until the positioning block 41 is completely retracted into the movable groove 8. At this time, the guide rail 5 can slide freely along the sliding groove 2, completing the positioning release. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0026] Example 3: This embodiment, based on the above embodiments, further defines the structure of the positioning mechanism, such as... Figure 3 ,of Figure 4 As shown, the reset assembly includes a mounting ring 431 and a reset spring 432. The mounting ring 431 is fixedly sleeved on the outer wall of the linkage rod 42 and located outside the guide rail 5. One end of the reset spring 432 is fixedly connected to the side of the mounting ring 431 away from the guide rail 5, and the other end of the reset spring 432 is fixedly connected to the outer wall of the guide rail 5. The reset spring 432 is always in a stretched state to apply a pulling force towards the guide rail 5 to the linkage rod 42. The tensile force of the reset spring 432 provides a continuous and stable reset force to the linkage rod 42. The mounting ring 431 serves as the connection medium between the spring and the linkage rod 42, ensuring that the elastic force is evenly transmitted to the linkage rod 42, so that the positioning block 41 can be stably housed in the movable groove 8 when there is no external force adjustment, and can be quickly disengaged from the positioning hole 47 during mold changing.

[0027] The specific implementation process is as follows: In the initial state of the reset component, during assembly, the mounting ring 431 is fixedly sleeved on the outer wall of the linkage rod 42 and located outside the guide rail 5. One end of the reset spring 432 is fixed to the side of the mounting ring 431 away from the guide rail 5, and the other end is fixed to the outer wall of the guide rail 5. At this time, the reset spring 432 is in a naturally stretched state, applying a pulling force towards the guide rail 5 to the mounting ring 431. Then, the linkage rod 42 is driven to move towards the guide rail 5 through the mounting ring 431, so that the positioning block 41 is stored in the movable groove 8.

[0028] During positioning, when the adjusting rod 46 is rotated and the linkage rod 42 moves downward, the linkage rod 42 drives the mounting ring 431 to move away from the guide rail 5, causing the return spring 432 to be further stretched and store elastic potential energy.

[0029] During mold changing, after the locking assembly releases the locking of the adjusting rod 46, the reset spring 432 releases its elastic potential energy, which pulls the linkage rod 42 towards the guide rail 5 via the mounting ring 431. The linkage rod 42 drives the positioning block 41 to be pulled out of the positioning hole 47 until the positioning block 41 is retracted into the movable groove 8, completing the reset. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0030] Example 4: This embodiment, based on the above embodiments, further defines the structure of the positioning mechanism, such as... Figure 3 ,of Figure 4 As shown, the slider assembly includes a slide rail 451, a slider 452, and a limiting block 453. The slide rail 451 is fixedly connected to the side wall of the adjusting rod 46 along its length. The slider 452 is slidably engaged with the slide rail 451. The side of the slider 452 away from the slide rail 451 is rotatably connected to the end of the linkage rod 42 extending to the outside of the guide rail 5. The limiting block 453 is fixedly connected to both ends of the slide rail 451 to limit the sliding limit position of the slider 452 on the slide rail 451. This converts the rotational motion of the adjusting rod 46 into the vertical lifting motion of the linkage rod 42, solving the transmission adaptation problem between rotating and linear motion components. Simultaneously, the limiting block 453 limits the sliding limit of the slider 452, preventing the slider 452 from disengaging from the slide rail 451 and causing transmission failure, thus ensuring the stability of the transmission path.

[0031] The specific implementation process is as follows: the slide rail 451 is fixed to the side wall of the adjusting rod 46 along the length direction of the adjusting rod 46, the slider 452 is installed on the slide rail 451 and ensures smooth sliding, the side of the slider 452 away from the slide rail 451 is rotatably connected to the end of the linkage rod 42 extending to the outside of the guide rail 5, and finally the limit blocks 453 are fixed at both ends of the slide rail 451 to prevent the slider 452 from sliding over the travel.

[0032] During positioning, when the adjusting rod 46 is rotated, the adjusting rod 46 rotates around the rotation point between itself and the side wall of the stamping die 3, causing the slide rail 451 to rotate synchronously with the adjusting rod 46; since the slider 452 is rotatably connected to the linkage rod 42, and the linkage rod 42 is restricted by the movable groove 8 to only move in the vertical direction, the rotation of the slide rail 451 will push the slider 452 to slide along the slide rail 451, and at the same time convert the rotational motion into the vertical downward movement of the linkage rod 42, which will eventually drive the positioning block 41 to insert into the positioning hole 47.

[0033] During the sliding of slider 452 along slide rail 451, when slider 452 moves to the end of slide rail 451, it will contact limit block 453. Limit block 453 prevents slider 452 from continuing to slide, preventing slider 452 from disengaging from slide rail 451, ensuring stable transmission process, and preventing excessive descent of linkage rod 42 that could damage positioning block 41 or positioning hole 47. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0034] Example 5: This embodiment, based on the above embodiments, further defines the structure of the positioning mechanism, such as... Figure 3 ,of Figure 4 As shown, the snap-fit ​​assembly includes a fixing plate 441, a contact spring 442, a sliding sleeve 443, and a snap-fit ​​rack 444. The fixing plate 441 is fixedly connected to the side wall of the adjusting rod 46 and close to the stamping die 3. The sliding sleeve 443 is movably sleeved on the surface of the adjusting rod 46 and slides along the axial direction of the adjusting rod 46. The snap-fit ​​rack 444 is fixedly connected to the side of the sliding sleeve 443 close to the guide rail 5. The contact spring 442 is sleeved on the outside of the adjusting rod 46, and one end of the contact spring 442 is fixedly connected to the side of the fixing plate 441 away from the stamping die 3, and the other end of the contact spring 442 is fixedly connected to the side of the snap-fit ​​rack 444 away from the guide rail 5. The side wall of the guide rail 5 is provided with a toothed groove 445 that meshes with the snap-fit ​​rack 444. The snap-fit ​​rack 444 can be inserted into the toothed groove 445 to limit the rotation angle of the adjusting rod 46. The thrust of the spring 442 is used to make the snap-fit ​​rack 444 tightly mesh with the tooth groove 445 on the side wall of the guide rail 5, thereby locking the rotation position of the adjusting rod 46; the sliding sleeve 443 serves as the connecting part between the snap-fit ​​rack 444 and the adjusting rod 46, ensuring that the snap-fit ​​rack 444 can slide along the axial direction of the adjusting rod 46 to disengage.

[0035] The specific implementation process is as follows: the fixing plate 441 is fixed to the side wall of the adjusting rod 46 near the stamping die 3, the sliding sleeve 443 is movably sleeved on the surface of the adjusting rod 46, the snap-fit ​​rack 444 is fixed on the side of the sliding sleeve 443 near the guide rail 5, and the contact spring 442 is sleeved on the outside of the adjusting rod 46, so that one end of the contact spring 442 is fixed to the side of the fixing plate 441 away from the stamping die 3, and the other end is fixed to the side of the snap-fit ​​rack 444 away from the guide rail 5. At this time, the contact spring 442 is in a natural compression state, and applies a pushing force towards the guide rail 5 to the snap-fit ​​rack 444.

[0036] After positioning, when the positioning block 41 is inserted into the positioning hole 47, the engaging rack 444, under the thrust of the engaging spring 442, fully engages with the tooth groove 445 on the side wall of the guide rail 5. Since the engagement between the rack and the tooth groove has a one-way locking property, it can limit the reverse rotation of the adjusting rod 46, thereby fixing the position of the linkage rod 42 and the positioning block 41, and realizing positioning and locking.

[0037] During mold changing, the sliding sleeve 443 is pulled axially away from the guide rail 5 along the adjusting rod 46. The sliding sleeve 443 drives the engaging rack 444 to move synchronously, causing the engaging rack 444 to disengage from the tooth groove 445, and simultaneously compressing the contact spring 442. At this time, the adjusting rod 46 can rotate freely, and the positioning is released in conjunction with the reset component. After releasing the sliding sleeve 443, the contact spring 442 pushes the engaging rack 444 to reset, waiting for the next locking. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0038] Example 6: This embodiment, based on the above embodiment, further adds a support plate 6, such as... Figure 1 , Figure 2 As shown, a support plate 6 is fixedly connected to both sides of the mounting base 1. A sliding groove 7 is provided on the top of the support plate 6. The sliding groove 7 is connected to the end of the sliding groove 2, and the width and depth of the sliding groove 7 are the same as those of the sliding groove 2, allowing the guide rail 5 to slide into the sliding groove 2 from the side of the support plate 6. By adding support plates 6 on both sides of the mounting base 1 and opening a sliding groove 7 on the support plate 6 that is connected to the sliding groove 2 and has the same size, an extended sliding path is formed. Utilizing the guiding and bearing function of the sliding groove 7, it is convenient for the guide rail 5 to slide into the sliding groove 2 from the side of the mounting base 1, avoiding the operational difficulty of aligning the guide rail 5 from the end of the sliding groove 2, and improving the ease of installation of the stamping die 3.

[0039] The specific implementation process is as follows: a bearing plate 6 is fixedly connected to both sides of the mounting base 1 to ensure that the top surface of the bearing plate 6 is flush with the top surface of the mounting base 1; a sliding groove 7 is opened on the top of the bearing plate 6 so that one end of the sliding groove 7 is connected to the end of the sliding groove 2, and the width and depth of the sliding groove 7 are completely consistent with the sliding groove 2 to form a continuous sliding channel.

[0040] Before positioning, align the guide rail 5 at the bottom of the stamping die 3 with the slide groove 7 on the bearing plate 6, and push the stamping die 3 so that the guide rail 5 slides along the slide groove 7. Since the slide groove 7 is connected to the slide groove 2 and has the same size, the guide rail 5 will smoothly transition from the slide groove 7 to the slide groove 2 until the stamping die 3 reaches the preset processing position. The subsequent positioning is the same as in the above embodiment, and will not be described again here.

[0041] During mold changing, after releasing the positioning, the stamping die 3 is pushed in the reverse direction, causing the guide rail 5 to slide from the sliding groove 2 into the sliding groove 7, and then slide out of the bearing plate 6 along the sliding groove 7, completing the disassembly of the stamping die 3. This avoids the problem of needing to reserve sufficient space for traditional end disassembly and is suitable for confined working environments. The other parts of this embodiment are the same as those in the above embodiments and will not be described again.

[0042] Example 7: This embodiment, based on the above embodiment, further adds handles. Handles are fixedly connected to both sides of the top of the stamping die 3. The outer wall of the handle is covered with an anti-slip rubber sleeve, and the surface of the anti-slip rubber sleeve has a diamond-shaped anti-slip texture. By fixing handles to both sides of the top of the stamping die 3, a clear gripping point is provided for the operator, facilitating the application of pushing or pulling force to the stamping die 3 and reducing the difficulty of operation during horizontal installation / disassembly. The anti-slip rubber sleeve 10 and the diamond-shaped anti-slip texture increase the friction between the hand and the handle 9, preventing slippage due to sweaty hands or force application, thus improving operational safety and stability.

[0043] The specific implementation process is as follows: handles are symmetrically fixed and connected on both sides of the top of the stamping die 3 to ensure that the height and spacing of the handles are ergonomic and easy to hold with both hands; anti-slip rubber sleeves are fitted on the outer wall of the handles, and diamond anti-slip textures are processed on the surface of the anti-slip rubber sleeves to enhance the grip friction.

[0044] Before positioning, the operator holds the handles on both sides of the top of the stamping die 3 with both hands and applies horizontal thrust through the handles to push the stamping die 3 so that the guide rail 5 moves along the slide groove 7 or sliding groove 2. There is no need to directly contact the processing surface of the stamping die 3 to avoid contaminating the die. At the same time, the diamond anti-slip texture can prevent the hand from slipping and ensure that the thrust is applied stably.

[0045] When changing molds, after releasing the positioning, the operator holds the handles with both hands and applies a reverse horizontal pulling force to pull the stamping die 3 so that the guide rail 5 slides out of the sliding groove 2 or sliding groove 7, completing the disassembly. If the stamping die 3 is difficult to push due to its tight fit, the handles can be slightly lifted upwards to facilitate the sliding of the guide rail 5, improving the ease of operation. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0046] Example 8: This embodiment, based on the above embodiment, further adds a wear-resistant coating. A wear-resistant coating, which is a tungsten carbide coating, is provided between the inner wall of the sliding groove 2 and the outer wall of the guide rail 5. By providing a wear-resistant coating of tungsten carbide on the inner wall of the sliding groove 2 and the outer wall of the guide rail 5, the high hardness and high wear resistance of tungsten carbide (HRC65-70) are utilized to reduce the wear caused by long-term sliding contact between the guide rail 5 and the sliding groove 2. Simultaneously, the coating thickness is controlled to 0.05-0.1 mm to avoid excessive coating thickness affecting the fit accuracy between the guide rail 5 and the sliding groove 2, thus extending the overall service life of the mechanism.

[0047] The specific implementation process is as follows: wear-resistant coating preparation and spraying: using plasma spraying technology, tungsten steel coating 11 is sprayed onto the inner wall of the sliding groove 2 of the mounting base 1 and the outer wall of the guide rail 5. The coating thickness is controlled to be 0.05-0.1mm by adjusting the spraying time and spraying distance. After spraying, the coating surface is polished to ensure the flatness of the inner wall of the sliding groove 2 and the outer wall of the guide rail 5, and to avoid coating protrusions affecting the sliding fit.

[0048] During use, when the guide rail 5 slides along the sliding groove 2 during the installation and disassembly of the stamping die 3, the tungsten steel wear-resistant coating directly contacts and bears the sliding friction force. Since the wear resistance of the tungsten steel coating is much higher than that of the substrate of the mounting base 1 and the guide rail 5, it can greatly reduce the wear of the inner wall of the sliding groove 2 and the outer wall of the guide rail 5, and avoid problems such as increased fit clearance and decreased positioning accuracy caused by wear.

[0049] After prolonged use, the wear level of the wear-resistant coating can be determined by observing the clearance between the sliding groove 2 and the guide rail 5. Worn areas can be locally re-sprayed with tungsten steel coating without replacing the entire mounting base 1 or guide rail 5, thus reducing maintenance costs and extending the service life of the mechanism. Other parts of this embodiment are the same as those in the above embodiments and will not be repeated.

[0050] It is understood that the working principle and process of the quick mold changing positioning mechanism structure according to one embodiment of the present invention, such as the handle and wear-resistant coating, are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A quick-change positioning mechanism for a micro metal sheet stamping die, characterized in that, include: The mounting base (1) has multiple sliding grooves (2) on its top, and the sliding grooves (2) are parallel to each other; The stamping die (3) is detachably mounted on the mounting base (1). The bottom of the stamping die (3) is fixedly connected to multiple guide rails (5). The guide rails (5) slide in cooperation with the sliding groove (2) to realize the translational installation of the stamping die (3). The positioning mechanism is provided in multiple sets. Two sets of the positioning mechanism are symmetrically arranged on each guide rail (5) along its length direction. The positioning mechanism and the sliding groove (2) are engaged with each other to realize the positioning and fixing of the stamping die (3) on the mounting base (1). Each positioning mechanism includes a positioning block (41), a linkage rod (42), a reset assembly, an adjusting rod (46), a slider assembly, and a snap-fit ​​assembly; the bottom of the guide rail (5) is provided with a movable groove (8) for the positioning block (41) to slide up and down, the positioning block (41) is slidably disposed in the movable groove (8), one end of the linkage rod (42) is fixedly connected to the top of the positioning block (41), and the other end of the linkage rod (42) passes through the guide rail (5) vertically and extends to the outside of the guide rail (5), and one end of the reset assembly is connected to the top of the positioning block (41). The outer wall of the guide rail (5) is fixedly connected, and the other end of the reset assembly is fixedly connected to the outer wall of the linkage rod (42) to drive the positioning block (41) to reset. One end of the adjusting rod (46) is rotatably connected to the side wall of the stamping die (3). The linkage rod (42) is connected to the adjusting rod (46) through the slider assembly to realize that the adjusting rod (46) drives the linkage rod (42) to rise and fall. The snap-fit ​​assembly is set on the adjusting rod (46) and cooperates with the guide rail (5) to limit the rotation position of the adjusting rod (46).

2. The quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1, characterized in that, The mounting base (1) has a positioning hole (47) adapted to the positioning block (41) on its surface and at the bottom of the sliding groove (2). The positioning block (41) can be inserted into the positioning hole (47) to achieve the snap-fit ​​positioning of the guide rail (5) and the mounting base (1).

3. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, The reset assembly includes a mounting ring (431) and a reset spring (432); the mounting ring (431) is fixedly sleeved on the outer wall of the linkage rod (42) and located outside the guide rail (5); one end of the reset spring (432) is fixedly connected to the side of the mounting ring (431) away from the guide rail (5); the other end of the reset spring (432) is fixedly connected to the outer wall of the guide rail (5); and the reset spring (432) is always in a stretched state to apply a pulling force toward the guide rail (5) to the linkage rod (42).

4. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, The slider assembly includes a slide rail (451), a slider (452), and a limiting block (453). The slide rail (451) is fixedly connected to the side wall of the adjusting rod (46) along the length direction of the adjusting rod (46). The slider (452) slides with the slide rail (451). The side of the slider (452) away from the slide rail (451) is rotatably connected to the end of the linkage rod (42) extending to the outside of the guide rail (5). The limiting block (453) is fixedly connected to both ends of the slide rail (451) to limit the sliding limit position of the slider (452) on the slide rail (451).

5. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, The snap-fit ​​assembly includes a fixing plate (441), a contact spring (442), a sliding sleeve (443), and a snap-fit ​​rack (444). The fixing plate (441) is fixedly connected to the side wall of the adjusting rod (46) and close to the stamping die (3). The sliding sleeve (443) is movably sleeved on the surface of the adjusting rod (46) and slides along its axial direction. The snap-fit ​​rack (444) is fixedly connected to the side of the sliding sleeve (443) close to the guide rail (5). The contact spring (442) is fixedly connected to the side wall of the adjusting rod (46) close to the guide rail (5). The spring (442) is fitted on the outside of the adjusting rod (46), and one end of the spring (442) is fixedly connected to the side of the fixing plate (441) away from the stamping die (3). The other end of the spring (442) is fixedly connected to the side of the snap-fit ​​rack (444) away from the guide rail (5). The side wall of the guide rail (5) is provided with a tooth groove (445) that meshes with the snap-fit ​​rack (444). The snap-fit ​​rack (444) can be inserted into the tooth groove (445) to limit the rotation angle of the adjusting rod (46).

6. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, The mounting base (1) is fixedly connected to both sides of the bearing plate (6). The top of the bearing plate (6) is provided with a sliding groove (7). The sliding groove (7) is connected to the end of the sliding groove (2). The width and depth of the sliding groove (7) are the same as those of the sliding groove (2), so that the guide rail (5) can slide into the sliding groove (2) from the side of the bearing plate (6).

7. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, The stamping die (3) is fixedly connected to handles on both sides of the top. The outer wall of the handle is covered with an anti-slip rubber sleeve, and the surface of the anti-slip rubber sleeve is provided with a diamond-shaped anti-slip pattern.

8. A quick mold changing and positioning mechanism for a micro metal sheet stamping die according to claim 1 or 2, characterized in that, A wear-resistant coating is provided between the inner wall of the sliding groove (2) and the outer wall of the guide rail (5), and the wear-resistant coating is a tungsten steel coating.

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