A tin cap rapid mold changing forming device

Abstract

The present application relates to tin metal stamping technology field, specifically, it relates to a kind of tin cap quick die changing forming device.Tin cap quick die changing forming device includes: base assembly;Male die assembly, including male die, male die clamping jaw, guide plate and stamping guide rail;The bottom of the guide plate is slidably connected with the stamping guide rail;Female die assembly, it is oppositely spaced on the base assembly with the male die assembly;Including the positioning taper block with inner taper surface, die changing guide rail, flat mouth vice and the taper female die with outer taper surface;The positioning taper block is set on the base assembly;Die changing scheduling component, including cross slider and linear module;The linear module is set on the end surface of the base assembly;The flat mouth vice can be slid along the die changing guide rail to the cross slider.The problem that workpiece breakage caused by different core of mould when multi-specification tin cap stamping, long artificial disassembly debugging cycle is solved.

Description

Technical Field

[0001] This invention relates to the field of tin metal stamping technology, and more specifically, to a quick mold-changing forming device for tin caps. Background Technology

[0002] Tin caps in the high-end packaging industry possess excellent properties such as non-toxicity, high barrier properties, premium texture, and recyclability, making them a preferred material to replace traditional plastic and ordinary aluminum caps. Modern tin cap stamping technology generally employs a horizontal, multi-station continuous stamping process, with peripheral equipment typically including automatic conveyor belt feeding mechanisms, continuous handling robots, and finished product counting and collection devices. To meet market demands for customized tin caps of different diameters, depths, and draft angles, existing production lines usually require die changes on the horizontal stamping press. Traditional die-changing methods typically use rigid fasteners such as bolts to statically lock the entire set of punch and die onto their respective mounting bases. When switching product specifications, operators must manually disassemble and reassemble the entire stamping die offline, then manually adjust the bolts or shims to fine-tune the relative positions of the punch and die.

[0003] However, traditional horizontal stamping equipment has significant drawbacks when facing multi-specification, rapid die-changing scenarios: static assembly cannot guarantee dynamic concentricity, which can easily lead to workpiece breakage; due to the extremely unique ductility of tin sheets and their status as ultra-thin deep-drawing parts, the stamping process requires extremely high die alignment accuracy. Traditional equipment is prone to slight eccentricity due to accumulated assembly errors during offline manual die-changing and manual calibration; and during continuous high-frequency stamping, the die lacks a rigid self-alignment and axial constraint mechanism under huge lateral impact forces, making it prone to slight runout and misalignment; offline disassembly and assembly debugging cycles are long, and the production line has low multi-dimensional response efficiency: the disassembly, alignment, and online debugging processes of traditional horizontal dies are extremely cumbersome and time-consuming, requiring a complete shutdown and repeated trial stamping calibration for each die change. This offline debugging method, which relies on manual experience, results in long mold changeover cycles and high labor intensity. It also prevents one-click or modular rapid switching, severely restricting the flexible response capability of multi-size tin cap production lines. Furthermore, the fixed workstation layout prevents flexible step-by-step cutting without disrupting the overall machine continuity: the existing equipment's workstation allocation and mechanical transmission chains are completely fixed and locked. When changes in product specifications or processes necessitate adding, removing, or cutting certain steps in continuous stamping, traditional equipment requires extensive dismantling and reconfiguration of the entire stamping line's hardware layout and workstations. This significantly impacts the overall operational stability of the stamping equipment, making flexible configuration reconfiguration of the production line impossible. Summary of the Invention

[0004] To address the problems of workpiece breakage and long manual disassembly and adjustment cycles caused by die misalignment during multi-specification tin cap stamping, this invention provides a quick die-changing forming device for tin caps, comprising a base assembly, and a punch assembly and a die assembly arranged at relative intervals on the base assembly; wherein: The punch assembly includes a punch, a punch gripper, a guide plate, and a stamping guide rail; the stamping guide rail is mounted on the base assembly; the punch is detachably mounted on the punch gripper; the punch gripper is connected to the guide plate; the bottom of the guide plate is slidably connected to the stamping guide rail; The die assembly includes a positioning cone block with an inner conical surface, a die-changing guide rail, a flat-jaw vise, and a conical die with an outer conical surface. The positioning cone block is mounted on a base assembly. The die-changing guide rail passes through the bottom of the positioning cone block and is mounted on the base assembly. Two flat-jaw vises are located on both sides of the conical die and clamp together with the conical die to form a slidable die component. The die component is slidably connected to the die-changing guide rail. The outer conical surface of the conical die engages with the inner conical surface of the positioning cone block. The centerline of the punch jaws coincides with the center axis of the inner conical surface of the positioning cone block. The base assembly has a mold changing scheduling component on its end face. The mold changing scheduling component includes a cross slider and a linear module. The linear module is set on the end face of the base assembly. The cross slider and the linear module are slidably connected. The flat vise can slide along the mold changing guide rail onto the cross slider and switch between the stamping station and the standby state through the linear module.

[0005] In some embodiments, the die assembly further includes at least one locking pin; at least one first positioning hole is provided on the outer peripheral side of the inner conical surface of the positioning cone block, and at least one corresponding second positioning hole is provided on the outer peripheral side of the outer conical surface of the conical die; when the outer conical surface and the inner conical surface are engaged, the locking pin passes through the first positioning hole and is inserted into the second positioning hole to lock the relative position of the die component and the positioning cone block.

[0006] In some embodiments, the punch clamp includes a three-jaw structure. When the punch clamp is in a clamped state, the coaxiality of the punch is directly constrained by the three-jaw structure. When the punch clamp is in an open state, a disengagement gap is generated between the punch and the punch clamp.

[0007] In some embodiments, the mold changing guide extends to engage with the cross slider, and the flat vise slides along the mold changing guide to the cross slider, perpendicular to the trajectory of the cross slider sliding along the linear module; so that the die component can alternate positions along the serial path formed by the mold changing guide, the cross slider and the linear module.

[0008] In some embodiments, multiple punch assemblies and multiple die assemblies are provided and arranged in a parallel array on the base assembly; each set of punch assemblies is provided with an independent stamping drive cylinder behind it, and the stamping drive cylinder is driven to drive the punch clamp to reciprocate linearly along the stamping guide.

[0009] In some embodiments, the tapered die includes a first locking protrusion, a first base, a stamping through hole, a second locking protrusion, and a stamping centering block; the first locking protrusion and the second locking protrusion are respectively located on the bottom sides of the first base; the first locking protrusion, the first base, and the second locking protrusion are integrally formed; the stamping through hole extends through the first base axially; the stamping centering block is detachably connected to the first base, and the inner cavity of the stamping centering block is coaxially connected to the stamping through hole.

[0010] In some embodiments, the flat-jaw vise includes an integrally formed second base, a first guide groove, a support plate, and a slot; the first guide groove is disposed at the bottom of the second base and is slidably connected to the mold changing guide rail; the support plate is disposed on the end face of the second base and located at the top of the first guide groove; the slot is located at the connection between the top surface of the support plate and the end face of the second base; the support plates of the two flat-jaw vises jointly support the first base, and the first and second locking protrusions respectively engage with the slots on the corresponding flat-jaw vises.

[0011] In some embodiments, the positioning cone includes a third seat, a second guide groove, and a positioning through hole; the second guide groove is disposed at the bottom of the third seat; the mold changing guide rail passes through the second guide groove; the positioning through hole is disposed on the third seat; the central axis of the positioning through hole coincides with the central line of the punch clamp, the central axis of the stamping through hole, and the central axis of the inner cavity of the stamping centering block.

[0012] To solve the problems of workpiece breakage due to die misalignment and long manual disassembly and adjustment cycles during multi-specification tin cap stamping, this invention has the following advantages: By establishing a unified assembly benchmark for the entire machine through the base assembly, when the punch assembly reciprocates linearly along the stamping guide, the geometric constraint that the center line of the punch gripper coincides with the center axis of the inner conical surface of the positioning cone block, combined with the physical rigidity constraint that the outer conical surface of the conical die engages with the inner conical surface of the positioning cone block, ensures that the geometric center lines of the punch, punch gripper, and conical die are completely locked on the same axis after each die change assembly. This eliminates the cumulative assembly error caused by manual die changes and manual adjustments, as well as the lateral micro-running during continuous stamping, and prevents the tin cap thin plate cracking defect caused by uneven local stress due to non-concentricity. Simultaneously, two flat-jaw vises are clamped and combined with a conical die to form a sliding die component, which is slidably connected to a die-changing guide rail passing through the bottom of the positioning cone block. This transforms the originally fixed die into a movable, independent unit. During die changing, there is no need to manually disassemble the entire set of fasteners; the die component can directly detach from or enter the stamping station along the die-changing guide rail. Combined with the sliding connection between the cross slider and the linear module in the die-changing scheduling component, mechanized sliding and automatic scheduling switching of the die component along the guide rail between the stamping station and the standby state are achieved, eliminating the downtime for offline die disassembly and repeated trial stamping calibration. Furthermore, by scheduling the idle die component to the standby state through the cross slider and the linear module, independent exit of continuous stamping steps can be achieved without disassembling or disrupting the hardware layout of other stamping stations on the base assembly, maintaining the continuity of the machine's mechanical transmission and operational stability. Attached Figure Description

[0013] Figure 1 A schematic diagram of a quick mold-changing forming device for tin caps is shown in one embodiment; Figure 2 It shows Figure 1 A magnified view of part A in the image; Figure 3 It shows Figure 1 Schematic diagram of the middle die component; Figure 4 It shows Figure 1 Schematic diagram of a conical die; Figure 5 It shows Figure 1 Diagram of a flat-mouth vise; Figure 6 It shows Figure 1 Schematic diagram of the center positioning cone; Figure 7 It shows Figure 6 AA section view; Figure 8 It shows Figure 1 A magnified view of part B in the image; Figure 9 It shows Figure 8 A schematic diagram of the central cross slider.

[0014] Figure label: In the diagram, 1. Base assembly; 2. Punch assembly; 21. Punch; 22. Punch gripper; 23. Stamping guide rail; 24. Guide plate; 3. Die assembly; 31. Positioning cone block; 311. Third seat; 312. Second guide groove; 313. Positioning through hole; 32. Die changing guide rail; 33. Flat-jaw vise; 331. Second seat; 332. First guide groove; 333. Bearing plate; 334. Slot; 34. Conical die; 341. First locking punch; 342. First seat; 343. Stamping through hole; 344. Second locking punch; 345. Stamping centering block; 35. Locking pin; 36. First positioning hole; 37. Second positioning hole; 4. Die changing scheduling assembly; 41. Cross slider; 411. Bottom groove; 412. Top cone block; 42. Linear module; 5. Stamping drive cylinder. Detailed Implementation

[0015] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0016] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0017] Existing tin cap forming equipment generally employs a horizontal stamping layout where the entire set of dies and concave molds are fixed to the machine base with rigid fasteners. When facing the demand for flexible and rapid production of tin caps of various specifications, the reliance on manual offline assembly and disassembly of dies and manual centering calibration not only leads to lengthy downtime and debugging cycles for die changes and trial stamping, and low efficiency in multi-dimensional response; more seriously, its static assembly relationship cannot guarantee dynamic concentricity under continuous high-frequency stamping, making it highly susceptible to breakage due to uneven stress on thin sheet metal workpieces caused by slight die eccentricity. Furthermore, the fixed station allocation necessitates major modifications to the entire machine hardware when a cutting step is required, severely disrupting the continuity and stability of the production line. Therefore, designing a stamping device capable of high-precision self-centering die changing and flexible station scheduling has become a pressing technical bottleneck in the current high-end cold stamping forming field.

[0018] This embodiment discloses a quick mold-changing forming device for tin caps, such as... Figure 1 As shown, the system includes: a base assembly 1, which includes a horizontally positioned main platform serving as a rigid assembly reference for the entire device in a spatial coordinate system. To achieve continuous stamping, multiple punch assemblies 2 and die assemblies 3 are provided, and each punch assembly 2 and die assembly 3 forms a parallel array arrangement on the base assembly 1. Specifically, multiple positioning cones 31 are fixedly arranged side-by-side on the main platform, with each set of punch assemblies 2 spaced apart from its corresponding positioning cone 31.

[0019] On the base assembly 1, each set of punch assemblies 2 has an independent stamping drive cylinder 5 behind it, and the axis of the stamping drive cylinder 5 extends horizontally in the front-to-back direction. The cylinder body of the stamping drive cylinder 5 is fixedly mounted on the main platform of the equipment through a flange. The stamping drive cylinder 5 is drivenly connected to the guide plate 24, specifically, the output push rod of the stamping drive cylinder 5 is connected to the rear end face of the guide plate 24.

[0020] Due to the risk of deep drawing cracks in ultra-thin parts caused by the ductility and structural stability of tin materials, this solution ensures that the stamping pressure distribution in each step is under control by using a multi-station array arrangement and an independent stamping drive cylinder 5.

[0021] like Figure 2 As shown, the punch assembly 2 includes a punch 21, a punch gripper 22, a guide plate 24, and a stamping guide rail 23. The stamping guide rail 23 is horizontally fixed on the main table of the equipment, and the extension direction of the stamping guide rail 23 is parallel to the reciprocating motion direction of the stamping drive cylinder 5. The bottom protrusion of the guide plate 24 is engaged in the groove of the stamping guide rail 23 and is slidably connected with the stamping guide rail 23, so that the punch gripper 22 can perform a straight reciprocating motion without deviation along the stamping guide rail 23 under the thrust of the stamping drive cylinder 5.

[0022] The punch 21 is detachably mounted on the punch clamp 22. The punch clamp 22 includes a three-jaw structure. When the punch clamp 22 is in the closed clamping state, the three-jaw structure applies a symmetrical clamping force radially, causing the geometric center of the three-jaw structure to contact and engage with the outer periphery of the punch 21. This directly constrains the coaxiality of the punch 21 by relying on the physical centering characteristics of the three-jaw structure, ensuring that the geometric center axis of the punch 21 is always maintained on the preset stamping axis. When the punch clamp 22 is in the open state, the three-jaw structure loosens radially outward, creating a disengagement gap between the punch 21 and the punch clamp 22. At this time, the operator can directly pull out or insert the punch 21 axially without the need for tools, eliminating the time-consuming die-changing process caused by traditional bolt fastening.

[0023] The punch gripper 22 can be a commercially available general-purpose mechanical component well known to those skilled in the art. In this embodiment, a conventional three-jaw pneumatic gripper or a three-jaw self-centering chuck is preferred. The specific drive structure or air circuit control principle of the gripper is common knowledge in the art and will not be described in detail here.

[0024] like Figure 3 As shown, the die assembly 3 includes a positioning cone block 31, a die-changing guide rail 32, a flat-jaw vise 33, and a conical die 34 with an outer conical surface. Figure 6 As shown, the positioning cone block 31 includes a third seat 311, a second guide groove 312, and a positioning through hole 313. The third seat 311 is rigidly fixed to the front edge of the main platen of the equipment. The second guide groove 312 is located at the bottom of the third seat 311, and the mold changing guide rail 32 passes through the second guide groove 312 and is fixedly mounted on the main platen of the equipment. The mold changing guide rail 32 is an integral long guide rail that runs through all stamping stations to provide a unified mold changing trajectory reference.

[0025] The positioning through hole 313 extends horizontally through the third seat 311 along the axial direction, as shown below. Figure 7 As shown, the positioning through hole 313 includes interconnected equal-diameter sections and a tapered section along its axial direction; the tapered section has an inner conical surface with a gradually decreasing inner diameter. For example... Figure 4 As shown, the conical die 34 includes a first retaining protrusion 341, a first base 342, a stamping through hole 343, a second retaining protrusion 344, and a stamping centering block 345. Figure 3 As shown, the stamping centering block 345 includes interconnected equal-diameter sections and gradient sections along its axial direction; the gradient section has an outer conical surface with a gradually decreasing outer diameter. The first locking protrusion 341 and the second locking protrusion 344 are located on both sides of the bottom of the first base 342, and the first locking protrusion 341, the first base 342, and the second locking protrusion 344 are integrally formed. The stamping through hole 343 penetrates the first base 342 axially along the thickness direction. The stamping centering block 345 is detachably connected to the first base 342, and the inner cavity of the stamping centering block 345 is coaxially connected to the stamping through hole 343, together forming an internal accommodating cavity through which the punch 21 can pass and perform deep drawing on the tin sheet.

[0026] Two flat-jaw vises 33 are located on both sides of the conical die 34, and clamp together with the conical die 34 to form a sliding die component. Specifically, as shown... Figure 5As shown, the flat-jaw vise 33 includes an integrally formed second base 331, a first guide groove 332, a support plate 333, and a retaining groove 334. The first guide groove 332 is located at the bottom of the second base 331 and is slidably connected to the mold changing guide rail 32. The support plate 333 is located on the end face of the second base 331 and at the top of the first guide groove 332; the retaining groove 334 is located at the connection between the top surface of the support plate 333 and the end face of the second base 331. In the assembled state, the bearing plates 333 of the two flat vises 33 are brought close together and jointly support the bottom surface of the first base 342. The first locking protrusion 341 and the second locking protrusion 344 are respectively engaged with the corresponding locking grooves 334 on the flat vises 33. Through the relative clamping of the two flat vises 33, the first base 342, the first locking protrusion 341, the second locking protrusion 344 and the stamping centering block 345 are fixedly locked into a rigid die component that can slide as a whole along the die changing guide rail 32.

[0027] When the die component slides to the stamping station, the outer conical surface of the tapered die 34 engages with the inner conical surface of the positioning cone 31. Since the inner and outer conical surfaces are in a forced sliding contact at an angle, under the forward and backward pushing force applied by the vise 33, the geometric fit of the inner and outer conical surfaces forces the first seat 342 to undergo a slight displacement adjustment within the clearance range of the die-changing guide rail 32 until the outer conical surface of the tapered die 34 and the inner conical surface of the positioning cone 31 are completely seamlessly fitted. At this point, the centerline of the punch jaw 22, the center axis of the inner conical surface of the positioning cone 31, the center axis of the positioning through hole 313, the center axis of the stamping through hole 343, and the center axis of the inner cavity of the stamping centering block 345 all achieve a perfectly coaxial state in space, completely coinciding with each other. This full-axis coaxial coincidence avoids eccentricity errors caused by die-changing position deviations, preventing the thin plate from cracking due to uneven local stress.

[0028] To prevent die displacement due to reaction impact during high-frequency, high-tonnage stamping, the die assembly 3 also includes at least one locking pin 35. Figure 1 and Figure 3 As shown, at least one first positioning hole 36 is provided on the outer periphery of the inner conical surface of the positioning cone block 31, and at least one corresponding second positioning hole 37 is provided on the outer periphery of the outer conical surface of the conical die 34. After the outer conical surface and the inner conical surface are fitted and aligned, the operator inserts the locking pin 35 laterally through the first positioning hole 36 and into the second positioning hole 37. The shear force between the locking pin 35 and the pin hole rigidly locks the relative spatial position of the die component and the positioning cone block 31, preventing the die from jumping or shaking in any direction during the stamping process. The flat-jaw vise 33 is provided with a through hole, and the die changing guide rail 32 is provided with multiple through holes. When the conical die 34 is positioned and needs to be fixed with the positioning cone block 31, it is only necessary to align the through hole on the flat-jaw vise 33 with the through hole on the die changing guide rail 32 and tighten it with bolts to fix the conical die 34 and prevent subsequent stamping displacement.

[0029] like Figure 1 As shown, the mold changing scheduling component 4 includes a cross slider 41 and a linear module 42. The linear module 42 is disposed on the end face of the base component 1, and the guide rail arrangement direction of the linear module 42 is perpendicular to the mold changing guide rail 32. The cross slider 41 is slidably connected to the linear module 42.

[0030] like Figure 8 , Figure 9 As shown, the cross slider 41 includes an integrally formed bottom groove 411 and a top cone 412; the straight module 42 is inserted into the bottom groove 411 of the cross slider 41, and the bottom groove 411 of the cross slider 41 is slidably connected to the straight module 42; the width and height of the top surface of the top cone 412 of the cross slider 41 are the same as the height and width of the top surface of the mold changing guide rail 32. When it is necessary to change the conical die 34, the cross slider 41 can be manually slid on the straight module 42 to the replacement area, so that the rear extension of the mold changing guide rail 32 extends to meet the cross slider 41. The trajectory of the flat vise 33 sliding along the mold changing guide rail 32 onto the cross slider 41 is spatially perpendicular to the trajectory of the cross slider 41 sliding along the straight module 42.

[0031] When a stamping station requires alternation of multiple sized dies or a reduction in stamping steps, firstly, the locking pin 35 is released, and the entire die assembly clamped by the two flat-jaw vises 33 is pushed along the die-changing guide rail 32 away from the punch assembly 2. Since the top cone block 412 of the cross slide block 41 engages with the die-changing guide rail 32, the die assembly can slide out of the stamping station. Because the guide rail of the linear module 42 is relatively long, the tapered die 34 to be replaced can be fed in from one end of the linear module 42; the replaced tapered die 34 can be transported out from the other end of the linear module 42 or temporarily stored on the guide rail of the linear module 42. Subsequently, the cross slide block 41, manually or electrically driven, transports the die assembly backward along the sliding direction of the linear module 42 to the rear standby station of the linear module 42. Through the series path formed by the die-changing guide rail 32, the cross slider 41, and the linear module 42, the die component achieves mechanized alternation between the stamping station and the standby state. The entire process does not require disassembly or modification of other operating stations on the main platen, achieving flexible station cutting without disrupting the continuity of the entire machine.

[0032] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A quick-change molding device for tin caps, comprising a base assembly, and a punch assembly and a die assembly disposed at a relative interval on the base assembly; characterized in that: The punch assembly includes a punch, a punch gripper, a guide plate, and a stamping guide rail; the stamping guide rail is disposed on the base assembly; the punch is detachably disposed on the punch gripper; the punch gripper is connected to the guide plate; the bottom of the guide plate is slidably connected to the stamping guide rail; The die assembly includes a positioning cone block with an inner conical surface, a die-changing guide rail, a flat-jaw vise, and a conical die with an outer conical surface. The positioning cone block is disposed on the base assembly. The die-changing guide rail passes through the bottom of the positioning cone block and is disposed on the base assembly. Two flat-jaw vises are respectively located on both sides of the conical die and clamp the conical die to form a slidable die component. The die component is slidably connected to the die-changing guide rail. The outer conical surface of the conical die engages with the inner conical surface of the positioning cone block. The centerline of the punch jaws coincides with the central axis of the inner conical surface of the positioning cone block. The base assembly is provided with a mold changing scheduling component on its end face. The mold changing scheduling component includes a cross slider and a linear module. The linear module is disposed on the end face of the base assembly. The cross slider is slidably connected to the linear module. The flat-jaw vise can slide along the mold changing guide rail onto the cross slider and switch between the stamping station and the standby state through the linear module.

2. The tin cap quick mold changing forming device according to claim 1, characterized in that, The die assembly further includes at least one locking pin; at least one first positioning hole is provided on the outer peripheral side of the inner conical surface of the positioning cone block, and at least one corresponding second positioning hole is provided on the outer peripheral side of the outer conical surface of the conical die; when the outer conical surface and the inner conical surface are engaged, the locking pin passes through the first positioning hole and is inserted into the second positioning hole to lock the relative position of the die assembly and the positioning cone block.

3. The tin cap quick mold changing forming device according to claim 1, characterized in that, The punch clamping jaws include a three-jaw structure. When the punch clamping jaws are in the clamping state, the coaxiality of the punch is directly constrained by the three-jaw structure. When the punch clamping jaws are in the open state, a disengagement gap is generated between the punch and the punch clamping jaws.

4. The tin cap quick mold changing forming device according to claim 1, characterized in that, The mold changing guide rail extends to connect with the cross slider, and the trajectory of the flat vise sliding along the mold changing guide rail to the cross slider is perpendicular to the trajectory of the cross slider sliding along the linear module; so that the die component can alternate positions along the serial path formed by the mold changing guide rail, the cross slider and the linear module.

5. The tin cap quick mold changing forming device according to claim 1, characterized in that, Multiple punch assemblies and multiple die assemblies are provided and arranged in a parallel array on the base assembly. Each punch assembly is provided with an independent stamping drive cylinder behind it. The stamping drive cylinder is driven by the punch gripper to drive the punch gripper to reciprocate linearly along the stamping guide rail.

6. The tin cap quick mold changing forming device according to claim 1, characterized in that, The conical die includes a first locking protrusion, a first base, a stamping through hole, a second locking protrusion, and a stamping centering block; the first locking protrusion and the second locking protrusion are respectively located on the bottom sides of the first base; the first locking protrusion, the first base, and the second locking protrusion are integrally formed; the stamping through hole extends axially through the first base; the stamping centering block is detachably connected to the first base, and the inner cavity of the stamping centering block is coaxially connected to the stamping through hole.

7. The tin cap quick mold changing forming device according to claim 6, characterized in that, The flat-jaw vise includes an integrally formed second base, a first guide groove, a support plate, and a slot; the first guide groove is disposed at the bottom of the second base and is slidably connected to the mold changing guide rail; the support plate is disposed on the end face of the second base and located at the top of the first guide groove; the slot is located at the connection between the top surface of the support plate and the end face of the second base. The two flat-jaw vises have their support plates supporting the first base, and the first and second locking protrusions engage with the corresponding locking slots on the flat-jaw vises.

8. A quick mold-changing forming device for tin caps according to claim 6, characterized in that, The positioning cone block includes a third seat, a second guide groove, and a positioning through hole; the second guide groove is disposed at the bottom of the third seat; the mold changing guide rail passes through the second guide groove; the positioning through hole is disposed on the third seat; the central axis of the positioning through hole coincides with the central line of the punch clamp, the central axis of the stamping through hole, and the central axis of the inner cavity of the stamping centering block.

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