A rapid intelligent hardware product stamping method

Abstract

The present application relates to a kind of quick intelligent hardware product stamping methods, belong to hardware product intelligent stamping technical field, solve the rebound problem by the joint action of temperature gradient control and partition mechanical compensation, heating and cooling unit are set in bending station, pre-pressing is carried out through low-friction coating pressboard and high-strength spring in outer side tension area, and tensile crack is reduced, in inner side compression area, through the design of stepped material lifting block cooperation multi-rigidity spring group, so that partition elastic retreat, absorb excess material and inhibit wrinkle, in transition area, wedge-shaped ejector rod and wedge-shaped floating slider are designed, material is pressed in bending middle and late stage, and rebound is actively pre-compressed to offset;In addition, by real-time monitoring bending force curve through intelligent closed-loop control, compare the deviation of theoretical value, adaptively adjust temperature control parameter and bending speed, until rebound amount is stabilized in error range, solve the problem of how to simultaneously inhibit bending defect and accurately control rebound amount in continuous stamping process in prior art.

Description

Technical Field

[0001] This invention belongs to the field of intelligent stamping technology for hardware products, and specifically relates to a fast and intelligent stamping method for hardware products. Background Technology

[0002] With the increasing demands for both production efficiency and precision in the hardware industry, progressive stamping technology using rolled stainless steel materials has become a core manufacturing process for key components such as slide rails and hinges.

[0003] This technology allows materials to complete punching, bending, and forming steps sequentially through multiple stations on the mold, enabling rapid production. However, when using this technology to process stainless steel, some problems have been encountered: because stainless steel itself has high strength and becomes harder under pressure, the outer material is easily stretched and prone to micro-cracks during bending, while the inner material is easily wrinkled when squeezed. After bending, the material will "spring back" when the mold is released, resulting in a large deviation between the final bending angle and the design requirements. This deviation often exceeds the allowable range. In addition, inaccurate angles will seriously affect the assembly accuracy of the slide rail and the durability of the hinge.

[0004] Currently, the industry commonly uses two methods to solve this problem: the first is to add annealing, heating the material midway to eliminate stress, but this interrupts the continuous production process and loses its high efficiency advantage; the second is over-bending compensation, deliberately exceeding the target angle during bending and relying on springback to get it exactly in place, but this requires repeated manual trial and error to adjust the "compensation amount", which takes several hours to debug, and the effect becomes unstable once the material batch changes. Therefore, for the complex multi-segment bending structure on the slide rail and the precision rotating shaft part on the hinge, the existing technology is difficult to ensure both production efficiency and precise control of bending shape and angle. Therefore, there is an urgent need to develop a new and fast intelligent stamping method to solve these problems. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides a rapid and intelligent stamping method for hardware products, which solves the problem of how to simultaneously suppress bending defects and accurately control springback during continuous stamping, thereby achieving efficient and stable intelligent production.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A stamping method for fast and intelligent hardware products includes the following steps:

[0008] S1: A temperature control module is set up at the bending station of the progressive stamping die. Then, the outer side of the bending line and the contact area of ​​the upper die rounded corner of the progressive stamping die bending station are first defined as the outer tension zone. Then, the inner side of the bending line and the support area of ​​the lower die rounded corner of the progressive stamping die bending station are defined as the inner pressure zone. Then, the area of ​​the progressive stamping die bending station between the inner pressure zone and the outer tension zone is defined as the transition zone. A pressure plate with a low friction coating is set at the upper die rounded corner of the outer tension zone. The pressure plate is pre-pressed by a high-strength spring pre-pressing mechanism. A stepped ejector block is set in the lower die rounded corner support area of ​​the inner pressure zone. The ejector block is supported by springs of different stiffnesses. Multiple sets of wedge-shaped ejector rods are set inside the lower die and in the area close to the root of the lower die rounded corner in the transition zone. The inclined surfaces of the multiple sets of wedge-shaped ejector rods are in contact with a wedge-shaped floating slider. The wedge-shaped floating slider is supported by a strong spring.

[0009] S2: After being uncoiled and straightened, the stainless steel coil is intermittently fed into the progressive stamping die by a servo feeding mechanism at a preset step distance.

[0010] S3: When the material enters the bending station, the temperature control module is activated through the intelligent control system;

[0011] S4: During the temperature gradient, the upper die moves downward at a constant speed to perform bending, while a pressure sensor monitors the bending force in real time.

[0012] S5: The bending force curve is pre-drawn in the intelligent control system based on the theoretical value of the bending force. The intelligent control system compares the deviation between the bending force curve monitored by the pressure sensor and the theoretical value, and adaptively adjusts the temperature control parameters and bending speed of the next step until the bending springback amount is stable within the specified error range during continuous production.

[0013] As a further embodiment of the present invention, the temperature control module includes a heating unit embedded in the upper die of the stamping die and a circulating cooling channel in the lower die. After the stainless steel coil is bent into place, pressure is maintained, and during this period, a constant temperature coolant is introduced into the circulating cooling channel to accelerate stress release.

[0014] As a further aspect of the present invention, in step S3, when the temperature control module is activated by the intelligent control system, the surface of the material in the bending area is heated to 150°C-300°C while the core remains at room temperature, thus forming a temperature gradient from the surface to the inside.

[0015] As a further aspect of the present invention, during the bending stroke, in step S1, the pressure plate at the rounded corner of the upper die contacts the inclined surface of the wedge-shaped floating slider in the transition zone, forcibly squeezing and driving the wedge-shaped floating slider to move horizontally, thereby pushing the wedge-shaped push rod in the transition zone to press the material vertically upward.

[0016] As a further embodiment of the present invention, the stepped ejector block in step S1 adopts a split structure, including a main ejector block and at least two auxiliary ejector blocks. The main ejector block matches the rounded corner contour of the lower mold, and the auxiliary ejector blocks are linked with the main ejector block through inclined sliders.

[0017] As a further embodiment of the present invention, in step S1, the bottom of the wedge-shaped floating slider is provided with a T-shaped guide groove, the T-shaped guide groove and the T-shaped guide rail opened on the lower mold form a sliding fit, and the two ends of the T-shaped guide rail are provided with limiting blocks.

[0018] As a further embodiment of the present invention, the powerful spring in step S1 adopts a concentric sleeve type multi-spring group structure. The powerful spring includes a central main spring and auxiliary springs arranged in a ring. The upper ends of the central main spring and auxiliary springs are integrated to receive force through a floating pressure plate.

[0019] As a further embodiment of the present invention, the back of the low-friction coating pressure plate in step S1 is provided with a spherical pad, and the upper mold is provided with a spherical seat. The spherical pad and the spherical seat provided on the upper mold form a self-adjusting joint structure.

[0020] As a further embodiment of the present invention, the wedge-shaped push rod in the transition zone of step S1 adopts a stepped shaft structure. The middle part of the wedge-shaped push rod is provided with an annular flange, and the lower mold is provided with a stepped hole. The annular flange and the stepped hole form a bidirectional limiting mechanism.

[0021] As a further embodiment of the present invention, the high-strength spring pre-compression mechanism in step S1 includes an eccentric adjustment wheel. The spring pre-compression amount is changed by rotating the eccentric adjustment wheel, and the outer circumference of the eccentric adjustment wheel is provided with anti-slip teeth.

[0022] The beneficial effects of this invention are as follows:

[0023] The springback problem is solved by combining temperature gradient control and zoned mechanical compensation. Heating and cooling units are set up at the bending station to form a temperature gradient from the surface to the inside, temporarily reducing the yield strength of the material. In the outer tension zone, a low-friction coated pressure plate and high-strength springs provide controllable tension and reduce tearing. In the inner compression zone, a stepped top block design combined with a multi-stiffness spring group allows for zoned elastic yielding, absorbing excess material and suppressing wrinkling. In the transition zone, a wedge-shaped top rod and a wedge-shaped floating slider are designed to actively pre-compress and counteract springback by pressing the material in the middle and late stages of bending. In addition, intelligent closed-loop control monitors the bending force curve in real time, compares the deviation with the theoretical value, and adaptively adjusts the temperature control parameters and bending speed until the springback amount stabilizes within the error range. This solves the problem of how to simultaneously suppress bending defects and accurately control the springback amount in continuous stamping process in existing technologies, achieving efficient and stable intelligent production. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a flowchart of the stamping method for rapid intelligent hardware products according to the present invention;

[0026] Figure 2 This is a schematic diagram of the region division method for the bending station of the progressive stamping die according to the present invention.

[0027] Explanation of key component symbols:

[0028] In the diagram: 1. Outer tension zone; 2. Inner compression zone; 3. Transition zone. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0030] Please see Figures 1-2 As shown, this embodiment provides a rapid intelligent stamping method for hardware products, including the following steps: S1: A temperature control module is set up at the bending station of the progressive stamping die. Then, the outer side of the bending line and the contact area of ​​the upper die rounded corner of the progressive stamping die bending station are first defined as the outer tension zone 1. Then, the inner side of the bending line and the lower die rounded corner support area of ​​the progressive stamping die bending station are defined as the inner pressure zone 2. Then, the area of ​​the progressive stamping die bending station between the inner pressure zone and the outer tension zone 1 is defined as the transition zone 3. A pressure plate with a low friction coating is set at the upper die rounded corner of the outer tension zone 1. The pressure plate is pre-pressed by a high-strength spring pre-pressing mechanism. A pressure plate with a low friction coating is set at the lower die rounded corner support area of ​​the inner pressure zone 2. The stepped ejector block is supported by springs of different stiffnesses. Multiple sets of wedge-shaped ejector rods are set inside the lower die in the transition zone 3 and in the area close to the root of the lower die's rounded corner. The inclined surfaces of the multiple sets of wedge-shaped ejector rods contact a wedge-shaped floating slider, which is supported by a strong spring. The division of the three areas—outer tension zone 1, inner compression zone 2, and transition zone 3—is based on the die geometry, the rounded corners of the upper and lower dies, and the stress state of the material at the moment of bending. Tension, compression, and shear are naturally defined, and the division is also based on material properties, bending requirements, and springback distribution. The stress state of each area is controlled in a targeted manner: the outer side reduces the risk of tearing, the inner side suppresses wrinkling, and the transition zone 3 actively pre-compresses to offset springback.

[0031] It should be noted that in the outer tension zone 1, the suspended material is pressed tightly at the beginning of bending to provide controllable tension and reduce the tensile stress on the outside. The downward stroke and pressure are determined by the spring preload and the die closing height. In the inner pressure zone 2, during bending, the inner material is pressed against the top block. The top block elastically yields to different degrees according to the local pressure, absorbing excess material and suppressing wrinkling. The stiffness and pre-compression of each spring section determine the degree of "yielding" in this area. In the transition zone 3, the wedge-shaped floating slider is supported by a strong spring. When the upper die moves downward to bend, after the upper die contacts the pressure plate of the outer tension zone 1, it continues to move downward and will force the drive block linked with the upper die to press down on the inclined surface of the wedge-shaped floating slider. The horizontal movement of the wedge-shaped floating slider is converted into the vertical upward movement of the wedge-shaped top rod. During the bending process, the top rod forcefully pushes into the material inside the transition zone 3, performing local and strong pre-compression or pre-deformation on the material fibers in this area to actively counteract the springback tendency.

[0032] S2: After the stainless steel coil is uncoiled and straightened, it is intermittently fed into the progressive stamping die by a servo feeding mechanism at a preset step distance. The advantage of using a servo mechanism to feed the material intermittently at a preset step distance is to ensure that the material is accurately positioned at the bending station, avoid the deviation of the bending line caused by the accumulation of step distance error, and ensure the consistency of continuous production.

[0033] S3: When the material enters the bending station, the temperature control module is activated through the intelligent control system; the surface of the material in the bending area is heated to 150℃-300℃ while the core remains at room temperature, forming a temperature gradient from the surface to the inside. Subsequent compensation mainly relies on the mechanical partition module. The temperature control module is activated immediately when the material enters the bending station, forming a temperature gradient that softens the surface and hardens the core only at the moment of bending, which reduces the yield strength and inhibits springback, and avoids the energy waste of heating throughout the process.

[0034] S4: During the temperature gradient, the upper die descends at a constant speed to perform bending. At the same time, a pressure sensor monitors the bending force in real time. The uniform speed movement of the upper die and the real-time monitoring of the bending force are intended to reduce stress fluctuations caused by dynamic impacts. The force sensor data provides real-time feedback for closed-loop control, replacing manual experience judgment.

[0035] S5: The bending force curve is pre-drawn in the intelligent control system based on the theoretical value of the bending force. The intelligent control system compares the deviation between the bending force curve monitored by the pressure sensor and the theoretical value, and adaptively adjusts the temperature control parameters and bending speed of the next step until the bending springback is stable within the specified error range during continuous production. By adaptively adjusting the parameters based on the deviation of the bending force curve, the batch differences of materials are dynamically compensated to keep the springback within the error range, thus achieving "one-time debugging and continuous stable production".

[0036] Currently, in the progressive stamping production of hardware products such as slide rails and hinges, stainless steel materials present three major challenges due to their high strength and high hardening rate: First, bending defects, where micro-cracks easily form in the outer tension zone 1 and wrinkles easily form in the inner compression zone 2; Second, uncontrolled springback, where material springback after bending causes angular deviations to exceed tolerances, affecting assembly accuracy and lifespan; Third, process contradictions, where existing solutions interrupt continuous production through annealing, and the over-bending compensation method requires repeated manual adjustments and is affected by batch fluctuations in materials, making it impossible to balance efficiency and accuracy.

[0037] To address the aforementioned issues, this embodiment employs a combination of temperature gradient control and zoned mechanical compensation to resolve springback. A heating and cooling unit is installed at the bending station to raise the material surface temperature by 150°C–300°C while maintaining a constant core temperature, creating a temperature gradient from the surface inwards. This temporarily reduces the material's yield strength. In the outer tension zone 1, a low-friction coated pressure plate and high-strength springs provide controllable tension and reduce tearing. In the inner compression zone 2, a stepped top block design combined with multi-stiffness springs allows for zoned elastic yielding, absorbing excess material and suppressing wrinkling. In the transition zone 3, a wedge-shaped top rod and a wedge-shaped floating slider are designed to control springback during bending. The system employs a pre-compression mechanism to actively suppress springback in the top-pressure material stage. Furthermore, it uses intelligent closed-loop control to monitor the bending force curve in real time, compare deviations with theoretical values, and adaptively adjust temperature control parameters and bending speed until the springback stabilizes within the error range. This solves the problem of how to simultaneously suppress bending defects and precisely control springback during continuous stamping, achieving efficient and stable intelligent production. In short, it softens the surface material through a temperature gradient, reducing springback tendency; the zoned mechanical structure specifically controls the distribution of tensile / compressive / shear stresses during bending; and the closed-loop system dynamically optimizes process parameters through force curve feedback, replacing manual trial and error and achieving high-precision control in continuous production.

[0038] Because a single temperature gradient decays rapidly after bending, resulting in insufficient release of residual stress inside the material, in order to solve this problem, in one embodiment, the temperature control module includes a heating unit embedded in the upper die of the stamping die and a circulating cooling channel in the lower die. After the stainless steel coil is bent to the correct position, pressure is maintained. During this period, a constant-temperature coolant is introduced into the circulating cooling channel to accelerate stress release. Therefore, in the pressure maintenance stage after bending to the correct position, a constant-temperature coolant is introduced into the circulating cooling channel of the lower die to accelerate the removal of heat from the core through heat conduction, which causes the softened surface material to harden and solidify quickly, thereby locking the deformed shape and reducing springback residue. The cooling channel and the heating unit work together to extend the temperature gradient effect window and enhance stress release efficiency.

[0039] To balance processing performance and material safety, and to ensure the effectiveness of springback suppression, in one embodiment, when the temperature control module is activated by the intelligent control system in step S3, the surface of the material is heated to 150°C–300°C while the core remains at room temperature, forming a temperature gradient from the surface to the interior. Since the yield strength of the material does not decrease sufficiently when the temperature is below 150°C, and may cause oxidation or intergranular corrosion on the stainless steel surface when the temperature is above 300°C, the heating target of the temperature control module is limited to the range of 150°C–300°C. This can significantly reduce the yield strength of the material without damaging the microstructure, ultimately achieving a balance between suppressing springback and ensuring the integrity of the material.

[0040] Furthermore, during the stamping of stainless steel coils, due to the complex stress state of the transition zone 3, the material in the transition zone 3 is in a critical stress state during the later stages of bending. Passive pressing is difficult to accurately counteract the springback tendency. To further overcome this problem, in one embodiment, during the bending stroke, the pressure plate at the rounded corner of the upper die in step S1 contacts the inclined surface of the wedge-shaped floating slider in the transition zone 3, forcibly squeezing and driving the wedge-shaped floating slider to move horizontally, thereby pushing the wedge-shaped ejector rod of the transition zone 3 to press the material vertically upward. The design is that when the upper die pressure plate moves downward, it forcibly squeezes the inclined surface of the wedge-shaped floating slider, converting the horizontal displacement into the vertical upward pressing of the wedge-shaped ejector rod, thereby achieving motion conversion. This allows the material fibers to be actively pre-compressed before springback occurs, thereby counteracting the springback. Here, precise timing pressing is achieved through die motion design, which can actively counteract the springback tendency.

[0041] Furthermore, during the stamping of stainless steel coils, the degree of wrinkling varies at different locations in the inner pressure zone 2, making it impossible for the integral ejector block to adapt to local material flow. To address this issue, in one embodiment, the stepped ejector block in step S1 adopts a split structure, comprising a main ejector block and at least two auxiliary ejector blocks. The main ejector block matches the rounded corner contour of the lower die, and the auxiliary ejector blocks are linked to the main ejector block via inclined sliders. Here, the main ejector block matches the lower die contour and the auxiliary ejector blocks are linked via inclined sliders. When the main ejector block is under pressure, it pushes the auxiliary ejector blocks to elastically retract in sections, thereby absorbing excess material according to the actual pressure gradient, adapting to material flow, and effectively suppressing non-uniform wrinkling.

[0042] It is worth mentioning that when stamping stainless steel coils, if the horizontal movement of the wedge-shaped floating slider deviates, it will cause the wedge-shaped ejector to jam or the pressing angle to become inaccurate. To avoid this problem, in one embodiment, a T-shaped guide groove is provided at the bottom of the wedge-shaped floating slider in step S1. The T-shaped guide groove forms a sliding fit with the T-shaped guide rail opened on the lower die. Limiting blocks are provided at both ends of the T-shaped guide rail. By providing a T-shaped guide groove at the bottom of the slider to form a sliding fit with the T-shaped guide rail of the lower die, and adding limiting blocks at both ends of the guide rail, the slider is ensured to move only in the set direction, thus ensuring the repeatability accuracy of the pressing action.

[0043] Furthermore, since the top pressure in the transition zone 3 requires a high load but a single spring is prone to breakage due to uneven load, in order to avoid this problem, in one embodiment, the strong spring in step S1 adopts a concentric sleeve type multi-spring group structure. The strong spring includes a central main spring and auxiliary springs arranged around it. The upper ends of the central main spring and auxiliary springs are integrated to bear the force through a floating pressure plate. Therefore, the central main spring provides a combination structure that distributes the load evenly with the surrounding auxiliary springs, and the upper ends of each spring are integrated to bear the force through a floating pressure plate, so that the top pressure is evenly distributed and the anti-eccentric load capacity is improved, avoiding failure caused by local stress concentration.

[0044] In actual stamping, errors in mold installation or long-term wear may cause the pressure plate to become skewed, resulting in uneven tension distribution in the outer tension zone 1. In one embodiment, a spherical pad is provided on the back of the low-friction coated pressure plate in step S1, and a spherical seat is provided on the upper mold. The spherical pad and the spherical seat on the upper mold form a self-adjusting joint structure. By providing a spherical pad on the back of the pressure plate and forming a ball joint connection with the spherical seat of the upper mold, the spherical degree of freedom is used to automatically compensate for small angular deviations, ensuring that the pressure plate always presses the material evenly and maintains the stability of tensile stress control.

[0045] To prevent the ejector rod from easily dislodging from its working position during frequent reciprocating motion, thus affecting the accuracy of the pressing depth, in one embodiment, the wedge-shaped ejector rod in the transition zone 3 in step S1 adopts a stepped shaft structure. The middle part of the wedge-shaped ejector rod is provided with an annular flange, and the lower mold is provided with a stepped hole. The annular flange and the stepped hole form a bidirectional limiting mechanism. The ejector rod is designed as a stepped shaft with an annular flange, which cooperates with the stepped hole of the lower mold. The vertical stroke of the ejector rod is strictly limited by the contact between the flange and the upper and lower end faces of the stepped hole, preventing axial movement during the pressing process.

[0046] In addition, since the spring preload needs to be finely adjusted according to the material batch, but traditional bolt adjustment is easy to loosen and inefficient, in one embodiment, the high-strength spring preload mechanism in step S1 includes an eccentric adjustment wheel. The spring preload is changed by rotating the eccentric adjustment wheel. The outer circumference of the eccentric adjustment wheel is provided with anti-slip teeth. The spring compression is changed by using the eccentric adjustment wheel, and anti-slip teeth are added to the wheel rim. The preload is accurately set by rotating the eccentric wheel. At the same time, the tooth meshing resistance prevents accidental displacement caused by vibration, thereby improving production debugging efficiency and parameter stability.

[0047] The working principle and workflow of this invention:

[0048] First, the bending station is divided into an outer tension zone 1, an inner compression zone 2, and a transition zone 3, and mechanical compensation structures such as a low-friction coated pressure plate, a stepped top block, and a wedge-shaped top rod are set up respectively. Then, after uncoiling and straightening, the stainless steel coil is fed into the die by a servo feeding mechanism. When the material enters the bending station, the temperature control module is activated to raise the surface temperature of the material to 150℃-300℃ while keeping the core at room temperature. By setting up a temperature control module at the bending station of the progressive stamping die, a temperature gradient from the surface to the inside is formed, temporarily reducing the yield strength of the material to alleviate the springback problem during bending. While the upper die moves down at a constant speed to perform bending, a pressure sensor monitors the bending force in real time. The intelligent control system adaptively adjusts the temperature control parameters and bending speed according to the deviation between the monitored bending force curve and the theoretical value until the springback amount stabilizes within the error range, thereby achieving efficient and stable intelligent production.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A stamping method for rapid and intelligent hardware products, characterized in that, Includes the following steps: S1: A temperature control module is set up at the bending station of the progressive stamping die. Then, the outer side of the bending line and the contact area of ​​the upper die rounded corner of the progressive stamping die bending station are first defined as the outer tension zone. Then, the inner side of the bending line and the support area of ​​the lower die rounded corner of the progressive stamping die bending station are defined as the inner pressure zone. Then, the area of ​​the progressive stamping die bending station between the inner pressure zone and the outer tension zone is defined as the transition zone. A pressure plate with a low friction coating is set at the upper die rounded corner of the outer tension zone. The pressure plate is pre-pressed by a high-strength spring pre-pressing mechanism. A stepped ejector block is set in the lower die rounded corner support area of ​​the inner pressure zone. The ejector block is supported by springs of different stiffnesses. Multiple sets of wedge-shaped ejector rods are set inside the lower die and in the area close to the root of the lower die rounded corner in the transition zone. The inclined surfaces of the multiple sets of wedge-shaped ejector rods are in contact with a wedge-shaped floating slider. The wedge-shaped floating slider is supported by a strong spring. S2: After being uncoiled and straightened, the stainless steel coil is intermittently fed into the progressive stamping die by a servo feeding mechanism at a preset step distance. S3: When the material enters the bending station, the temperature control module is activated through the intelligent control system to raise the surface temperature of the material in the bending area to 150℃-300℃ while keeping the core at room temperature, forming a temperature gradient from the surface to the inside. S4: During the temperature gradient, the upper die moves downward at a constant speed to perform bending, while a pressure sensor monitors the bending force in real time. S5: The bending force curve is pre-plotted in the intelligent control system based on the theoretical value of the bending force. The intelligent control system compares the deviation between the bending force curve monitored by the pressure sensor and the theoretical value, and adaptively adjusts the temperature control parameters and bending speed of the next step until the bending springback amount stabilizes within the specified error range during continuous production.

2. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, The temperature control module includes a heating unit embedded in the upper die of the bending station and a circulating cooling channel for the lower die. After the stainless steel coil is bent to the correct position, pressure is maintained, and a constant-temperature coolant is introduced into the circulating cooling channel to accelerate stress release.

3. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, During the bending stroke, in step S1, the pressure plate at the rounded corner of the upper die contacts the inclined surface of the wedge-shaped floating slider in the transition zone, forcibly squeezing and driving the wedge-shaped floating slider to move horizontally, thereby pushing the wedge-shaped push rod in the transition zone to press the material vertically upward.

4. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, In step S1, the stepped ejector block adopts a split structure, including a main ejector block and at least two auxiliary ejector blocks. The main ejector block matches the rounded corner contour of the lower mold, and the auxiliary ejector blocks are linked with the main ejector block through inclined sliders.

5. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, In step S1, the bottom of the wedge-shaped floating slider is provided with a T-shaped guide groove, which forms a sliding fit with the T-shaped guide rail opened on the lower mold, and the two ends of the T-shaped guide rail are provided with limiting blocks.

6. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, The powerful spring in step S1 adopts a concentric sleeve type multi-spring group structure. The powerful spring includes a central main spring and auxiliary springs arranged around it. The upper ends of the central main spring and auxiliary springs are integrated to receive force through a floating pressure plate.

7. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, In step S1, the low-friction coating pressure plate has a spherical pad on its back and a spherical seat on the upper mold. The spherical pad and the spherical seat on the upper mold form a self-adjusting joint structure.

8. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, In step S1, the wedge-shaped ejector in the transition zone adopts a stepped shaft structure. The middle part of the wedge-shaped ejector is provided with an annular flange, and the lower mold is provided with a stepped hole. The annular flange and the stepped hole form a bidirectional limiting mechanism.

9. The stamping method for a rapid intelligent hardware product according to claim 1, characterized in that, The high-strength spring pre-compression mechanism in step S1 includes an eccentric adjustment wheel. The spring pre-compression amount is changed by rotating the eccentric adjustment wheel. The outer circumference of the eccentric adjustment wheel is provided with anti-slip teeth.

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