Fine blanking transfer die and forming method

Abstract

The present application relates to a kind of fine blanking transfer mould and forming method, including upper die mechanism, lower die mechanism and mould in transmission mechanism. Upper die mechanism includes upper die holder, upper backing plate, upper fixed plate, press ring seat, press ring, fine blanking punch and die and bending punch and die, bending punch and die are fixed in press ring and move synchronously with it, to be driven bending forming by press force;Lower die mechanism includes lower die holder, lower backing plate, lower fixed plate, female die, fine blanking counterplate, bending punch, bending counterplate, fine blanking die insert, bending die insert and fine blanking punch;Blanking station and forming station are set on female die along longitudinal direction interval. Mould in transmission mechanism is arranged on the upper surface of female die, including transmission push plate, slide rail and driving part, and driving part drives transmission push plate reciprocating sliding between blanking station and forming station. Through station integration and mould in automatic transmission, avoid damage and efficiency loss caused by manual transfer, realize continuous automatic production.

Description

Technical Field

[0001] This invention relates to the field of precision stamping technology for sheet metal, and particularly to a precision stamping transfer mold and forming method. Background Technology

[0002] Fine blanking, relying on a triaxial compressive stress field to achieve precision blanking with a fully bright cross-section, is one of the core technologies in the field of precision plastic forming and is widely used in automotive, aerospace, and precision machinery manufacturing. For complex fine blanking parts that combine irregular contour blanking and partial bending forming characteristics, the production process usually requires a bending process after the blanking process.

[0003] Existing fine blanking dies generally employ a single-process, multi-die production method. This involves first blanking the part on one set of fine blanking dies, then manually transferring the blanked part to another set of bending dies for bending and shaping. The entire process requires two sets of independent dies and two pieces of equipment. This method results in low production efficiency, poor part consistency, and the manual transfer process easily causes surface scratches and dents, making it difficult to achieve automated continuous production. Summary of the Invention

[0004] Therefore, there is a need to provide a fine blanking transfer die and forming method to solve the technical problems of low production efficiency, poor part surface quality, and inability to achieve automated continuous production caused by the use of single-process multi-set dies and manual transfer of parts in existing fine blanking dies.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a fine blanking transfer die, comprising:

[0006] The upper die mechanism includes an upper die base, an upper pad plate, an upper fixed plate, a blank holder, a blank holder, a fine blanking die and a bending die. The upper die base, the upper pad plate, the upper fixed plate and the blank holder are arranged sequentially from top to bottom. The blank holder is set in the blank holder and can float relative to the blank holder. The fine blanking die is fixed to the upper pad plate, and the bending die is fixed to the blank holder and moves synchronously with the blank holder so as to bend and form by the blank holder force.

[0007] The lower die mechanism, which is arranged opposite to the upper die mechanism, includes a lower die base, a lower backing plate, a lower fixed plate, a die cavity, a fine blanking counter-pressure plate, a bending punch, a bending counter-pressure plate, a fine blanking die insert, a bending die insert, and a fine blanking punch. The lower die base, lower backing plate, lower fixed plate, and die cavity are arranged sequentially from bottom to top. The bending punch is fixed to the lower backing plate. The fine blanking counter-pressure plate and the bending counter-pressure plate are arranged inside the die cavity. The fine blanking die insert and the bending die insert are embedded in the die cavity. The fine blanking punch is fixed to the lower backing plate.

[0008] The die is provided with blanking station and forming station at intervals along the longitudinal direction. The fine blanking punch and die, fine blanking die insert, fine blanking punch and fine blanking counter plate cooperate to complete blanking at the blanking station. The bending punch and die, bending die insert, bending punch and bending counter plate cooperate to complete bending and forming at the forming station.

[0009] The in-mold transfer mechanism is located on the upper surface of the die and includes a transfer push plate, a slide rail, and a driving component. The slide rail is fixed to the die and defines the sliding path of the transfer push plate. The driving component is connected to the transfer push plate and drives the transfer push plate to slide back and forth between the blanking station and the forming station.

[0010] Unlike existing technologies, the above technical solution integrates the blanking station and the forming station into the same mold and uses an in-mold transfer mechanism to realize the automatic transfer of the parts to be processed between the stations. This avoids surface damage and efficiency loss caused by manual transfer of the parts to be processed, and realizes continuous automated production of blanking and bending processes in the same mold, which significantly improves production efficiency and part consistency.

[0011] In one embodiment of the present invention, the transfer push plate is provided with a sliding guide groove, which includes a middle guide groove and an end guide groove, wherein the width of the middle guide groove is greater than the width of the end guide groove.

[0012] A guide pin is fixedly installed on the die. The guide pin slides in contact with the inner wall of the sliding guide groove. When the push plate slides to the end of its stroke, the guide pin precisely engages with the inner wall of the end guide groove.

[0013] Thus, the wider width of the middle guide groove reduces the frictional resistance of the guide pin during sliding, ensuring smooth movement of the push plate; the narrower width of the end guide groove precisely matches the guide pin, achieving accurate positioning at the end of the stroke, thus balancing smooth movement and high accuracy of repeatability.

[0014] In one embodiment of the present invention, the bending punch is provided for the small-angle bending part of the part to be processed; the bending counter-pressure plate is connected to the forming cylinder which is independently provided below the forming station, and the bending counter-pressure plate is provided for the main bending area of ​​the part to be processed.

[0015] In this way, the bending punch provides rigid support for the small-angle bending section, and the bending counter-pressure plate is driven by an independent cylinder to provide controllable counter-pressure during the bending process. Both of them ensure the stability and consistency of the bending forming based on the positioning of the concave mold cavity.

[0016] In one embodiment of the present invention, the blanking force, the blanking force applied by the blanking ring push rod to the bending punch and die and the blanking ring, the counter pressure on the fine blanking counter pressure plate and the cylinder counter-pushing force applied by the forming cylinder to the bending counter pressure plate are four sets of force systems that are independent of each other and are controlled separately.

[0017] In this way, the four force systems of blanking, pressing, reverse pressing and bending reverse pressing are independent of each other and can be precisely controlled separately, avoiding mutual interference that could cause the parts to be processed to be flattened or not formed properly. This can meet the stamping requirements of various high-strength materials and is especially suitable for the mass production of high-precision stamped parts.

[0018] In one embodiment of the present invention, the fine blanking die insert and the bending die insert are respectively detachably embedded in the die. The fine blanking die insert and the bending die insert are used to compensate for shape deviations caused by material property fluctuations, die wear or bending springback by grinding or replacement.

[0019] In this way, the shape can be quickly adjusted by grinding or replacing the inserts during the debugging phase, without the need for a complete overhaul of the die, which greatly shortens the debugging cycle and reduces maintenance costs.

[0020] As one embodiment of the present invention, the upper surface of the transfer pusher is provided with an anti-jump component. When the fine blanking counter-pressure plate pushes the work to be processed into the transfer pusher, the anti-jump component is used to restrict the work to be processed from falling upward.

[0021] The bending die has a clearance groove at the position corresponding to the anti-jump component of the transfer push plate. When the bending die moves downward, the clearance groove is used to avoid the anti-jump component.

[0022] Thus, the anti-jump component can effectively prevent the workpiece from being ejected from the mold transfer mechanism due to inertia when it is pushed into the transfer push plate, ensuring the stability and reliability of the transfer process; the clearance groove can prevent interference between the bending punch and die and the anti-jump component when they descend, ensuring smooth mold closure.

[0023] In one embodiment of the present invention, a part cavity is provided on the transfer push plate. The outline dimension of the part cavity is larger than the outer outline dimension of the part to be processed. A positioning short side is provided at the key outline of the part cavity. The positioning short side abuts and fits with the key outline part of the part to be processed. A chamfered guide surface is provided at the lower outline edge of the part cavity.

[0024] Thus, the part cavity adopts the design principle of overall part shape expansion to ensure that the part to be processed can enter the part cavity smoothly; the positioning short side reduces frictional resistance while ensuring positioning accuracy; the chamfered guide surface plays a guiding role and helps the part to be processed to enter the part cavity smoothly.

[0025] As one embodiment of the present invention, the fine blanking die is provided with a discharge channel extending in the vertical direction, and the upper backing plate is provided with a discharge groove and an air guide groove. The discharge channel is connected to the discharge groove, the air guide groove is connected to the discharge groove, and the air guide groove is used to connect to an external air source.

[0026] In this way, the discharge channel guides the material generated by punching upward into the discharge groove, and the air guide groove introduces external airflow to blow the material out, effectively preventing the material from falling on the upper surface of the die and affecting the internal transmission mechanism.

[0027] In one embodiment of the present invention, the driving component is a cylinder, and the cylinder has limiting components at both ends of its stroke. The limiting components are fixed on the die, and a buffer component is provided at the limiting component. When the cylinder moves to the end of its stroke, it abuts against the buffer component.

[0028] In this way, the limiter and the buffer work together to limit the end of the cylinder's stroke and buffer the impact force, thus protecting the drive components and transmission mechanism.

[0029] To achieve the above objectives, in a second aspect, the present invention also provides a fine blanking transfer forming method, employing a fine blanking transfer die as provided by the inventors above, comprising the following steps:

[0030] S1: The strip is fed laterally into the blanking station, the upper and lower die mechanisms are closed, the pressure ring clamps the strip, and the fine blanking punch, fine blanking head and fine blanking die insert cooperate to perform fine blanking to obtain the part to be bent.

[0031] S2: Open the upper mold mechanism and the lower mold mechanism, and the driving component drives the push plate to slide longitudinally to the blanking station;

[0032] S3: The fine blanking counter-pressure plate moves upward, pushing the part to be bent into the transfer push plate; at the same time, the bending counter-pressure plate moves upward, pushing the formed part out of the forming station.

[0033] S4: The drive unit drives the transfer push plate to slide longitudinally from the blanking station to the forming station. The transfer push plate transfers the part to be bent to the forming station and pushes the formed part to the finished product area.

[0034] S5: Close the upper and lower die mechanisms again. The bending punch and die move downward with the pressure ring. The bending counter-pressure plate provides an upward counter-force. The bending punch and die, the bending die insert and the bending counter-pressure plate work together to bend and form the part to be bent. At the same time, the blanking station performs fine blanking on the next strip of material.

[0035] S6: Repeat S2 to S5 to achieve continuous cyclic stamping.

[0036] Unlike existing technologies, the above technical solution integrates blanking and bending processes within a limited mold space through a composite feeding method of horizontal feeding and vertical transfer, avoiding manual transfer and the investment of two sets of molds; the in-mold transfer mechanism realizes the automatic transfer of parts to be processed, and each stroke completes the full process of processing one part, realizing high-quality, high-efficiency continuous automated production of complex precision blanking parts.

[0037] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0038] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0039] In the accompanying drawings of the instruction manual:

[0040] Figure 1 This is a schematic diagram of the longitudinal section structure of the unloading station in the embodiments of this application;

[0041] Figure 2 This is a schematic diagram of the longitudinal section structure of the forming station in the embodiments of this application;

[0042] Figure 3 for Figure 2 A magnified view of part A in the image;

[0043] Figure 4 This is a schematic diagram of the longitudinal section of the material outlet at the material feeding station in an embodiment of this application.

[0044] Figure 5 for Figure 4 A magnified view of part B in the image;

[0045] Figure 6 This is a schematic diagram illustrating the movement of the in-mold transfer mechanism in the embodiments of this application;

[0046] Figure 7 This is a schematic diagram of the structure of the fine blanking die insert and the fine blanking punch at the blanking station in an embodiment of this application;

[0047] Figure 8 This is a schematic diagram of the bending die insert, bending punch and bending counter-pressure plate at the forming station in an embodiment of this application.

[0048] Figure 9 This is a schematic diagram of the in-mold transfer mechanism in the embodiments of this application;

[0049] Figure 10 This is a schematic diagram of the structure of the avoidance groove on the bending die and anti-jump component in the embodiment of this application;

[0050] Figure 11 This is a schematic diagram of the structure of the push plate for transferring the workpiece within the part cavity in an embodiment of this application;

[0051] Figure 12 This is a longitudinal cross-sectional view of the transfer pusher plate in the embodiment of this application;

[0052] Figure 13 for Figure 12 A magnified view of part C;

[0053] Figure 14 This is a top view of the in-mold transfer mechanism in the blanking station in an embodiment of this application;

[0054] Figure 15 This is a top view of the in-mold transfer mechanism in the forming station in an embodiment of this application.

[0055] The reference numerals used in the above figures are explained as follows:

[0056] 100. Part to be bent; 101. Formed part; 102. Part to be processed; 210. Strip material; 211. Material block; 1. Upper die mechanism; 11. Upper die base; 12. Upper backing plate; 121. Material outlet groove; 13. Upper fixing plate; 14. Blanket ring seat; 15. Blanket ring; 16. Fine blanking punch and die; 161. Material discharge channel; 17. Bending punch and die; 171. Clearance groove; 18. Blanket ring ejector rod; 2. Lower die mechanism; 21. Lower die base; 22. Lower backing plate; 23. Lower fixing plate; 24. Die; 241. Die cavity; 242. Blanking station; 243. Forming station; 244. Positioning. 25. Hole, fine blanking counter-pressure plate, 261. Bending punch, 262. Bending counter-pressure plate, 271. Fine blanking die insert, 272. Bending die insert, 28. Forming cylinder ejector rod, 29. Fine blanking punch, 3. In-mold transfer mechanism, 31. Transfer push plate, 311. Sliding guide groove, 3111. Intermediate guide groove, 3112. End guide groove, 32. Slide rail, 33. Drive component, 34. Part cavity, 341. Positioning short side, 342. Chamfered guide surface, 35. Anti-jump assembly, 4. Guide assembly, 5. Locking pin assembly, 6. Balance bar assembly, 7. Spring ejector pin, 8. Lower ejector rod assembly, 9. Limit block assembly. Detailed Implementation

[0057] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0058] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0059] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0060] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0061] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0062] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0063] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0064] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0066] In existing fine blanking technologies, the production of complex-shaped parts requires a bending process after the blanking process. This involves single-process, multi-die production and manual part transfer, resulting in low production efficiency, poor part surface quality, and the inability to achieve automated continuous production. Therefore, this application provides a fine blanking transfer die. By integrating the blanking station 242 and the forming station 243 into the same die and utilizing an in-die transfer mechanism 3, the part 102 to be processed is automatically transferred between the stations. This avoids the efficiency loss and surface damage caused by manual transfer of the part 102, and achieves continuous automated production of the blanking and bending processes within the same die.

[0067] The present invention will be further described in detail below with reference to specific embodiments. Taking this embodiment as an example, the fine blanking transfer die is used to process ratchet parts. The part material is 42CrMo with a thickness of 3 mm and is in a spheroidizing annealed state. The main technical parameters of the die are as follows: blanking force 500 kN (50 tons), which is the main blanking force provided by the main hydraulic cylinder of the fine blanking machine; blank holder force 250 kN (25 tons), which uses strong blank holder force to prevent lateral material flow; blank holder holding force 100 kN (10 tons); counter pressure 100 kN (10 tons), which is the counter pressure plate ejection force to ensure the cross-sectional quality; bending force 250 kN (25 tons), which is calculated by numerical simulation; total pressure 950 kN (95 tons), which is the sum of blanking force, counter pressure, blank holder holding force and bending force; the die dimensions are 340 mm × 340 mm × 360 mm; the production cycle is one piece per stroke.

[0068] According to some embodiments of this application, please refer to Figures 1 to 15 This embodiment relates to a fine blanking transfer die, including an upper die mechanism 1, a lower die mechanism 2, and an in-die transfer mechanism 3. The upper die mechanism 1 includes an upper die base 11, an upper pad 12, an upper fixed plate 13, a blank holder 14, a blank holder 15, a fine blanking punch and die 16, and a bending punch and die 17. The upper die base 11, upper pad 12, upper fixed plate 13, and blank holder 14 are arranged sequentially from top to bottom. The blank holder 15 is disposed within the blank holder 14 and can float relative to the blank holder 14. The fine blanking punch and die... 16 is fixed to the upper pad 12, and the bending die 17 is fixed to the pressure ring 15 and moves synchronously with the pressure ring 15 to be bent and formed by the pressure force; the lower die mechanism 2 is arranged opposite to the upper die mechanism 1, including a lower die base 21, a lower pad 22, a lower fixed plate 23, a die 24, a fine blanking counter-pressure plate 25, a bending punch 261, a bending counter-pressure plate 262, a fine blanking die insert 271, a bending die insert 272, and a fine blanking punch 29. The die 24 is arranged sequentially from bottom to top. The bending punch 261 is fixed to the lower backing plate 22. The fine blanking counter-pressure plate 25 and the bending counter-pressure plate 262 are arranged inside the die 24. The fine blanking die insert 271 and the bending die insert 272 are embedded inside the die 24. The die 24 has blanking stations 242 and forming stations 243 arranged longitudinally. The fine blanking punch and die 16, the fine blanking die insert 271, the fine blanking punch 29 and the fine blanking counter-pressure plate 25 cooperate at the blanking station 242 to complete blanking and bending. The punch and die 17, bending die insert 272, bending punch 261 and bending counter-pressure plate 262 cooperate at the forming station 243 to complete the bending forming; the in-die transfer mechanism 3 is provided on the upper surface of the die 24, including a transfer push plate 31, a slide rail 32 and a drive member 33. The slide rail 32 is fixed to the die 24 and limits the sliding path of the transfer push plate 31. The drive member 33 is connected to the transfer push plate 31 and drives the transfer push plate 31 to slide back and forth between the blanking station 242 and the forming station 243.

[0069] The upper die mechanism 1 is the upper part of the die assembly, used to install the upper die components for punching and bending. The upper die base 11 is connected to the upper worktable of the fine blanking machine. The upper backing plate 12 is located below the upper die base 11 to transmit and distribute the punching force. The upper fixing plate 13 is located below the upper backing plate 12. The blank holder 14 is located below the upper fixing plate 13. The blank holder 15 is located inside the blank holder 14 and can float relative to the blank holder 14. During punching, it first contacts the strip 210 and presses it against the upper surface of the die 24 to reduce lateral material flow. The blank holder ejector rod 18 passes through the upper die base 11, the upper backing plate 12, and the upper fixing plate 13, transmitting the blank holder force from the fine blanking machine to the blank holder 15 and the bending punch and die 17. The fine blanking die 16 is fixed to the upper pad 12, passes through the upper fixed plate 13 and the blank holder 15, and forms a sliding fit with the blank holder 15. The lower end face of the fine blanking die 16 is used to contact the strip 210 for blanking. The bending die 17 is fixed to the blank holder 15 and moves synchronously with the blank holder 15. Its driving force comes from the blank holder force rather than the main blanking force, so that the bending force and the blanking force are independent of each other, avoiding the blanking force from acting directly on the bending process and causing the workpiece 102 to be flattened and thinned.

[0070] The lower die mechanism 2 is located below the upper die mechanism 1, and consists of a lower die base 21, a lower backing plate 22, a lower fixing plate 23, and a die 24 from bottom to top. At the blanking station 242, a fine blanking punch 29 is fixed to the lower backing plate 22, and its punch end passes through the lower fixing plate 23 and extends into the die 24. During blanking, it moves upward and cooperates with the fine blanking punch and die 16 to blank the central circular hole of the part 102 to be processed. A fine blanking die insert 271 is embedded in the die 24 at the blanking station 242. The inner contour of the fine blanking die insert 271 forms the working surface of the cavity of the blanking station 242, and cooperates with the fine blanking punch and die 16 to complete the outer contour blanking. A fine blanking counter-pressure plate 25 is located inside the die 24, and ejects the part 102 to be processed from the die 24 after blanking is completed. At forming station 243, the bending punch 261 is fixed to the lower pad 22, and the bending counter-pressure plate 262 is located below forming station 243 and is connected to the forming cylinder through forming cylinder push rod 28. The die 24 is fitted with a bending die insert 272 corresponding to forming station 243. The inner contour of the bending die insert 272 forms the working surface of the cavity of forming station 243, and cooperates with the bending punch and die 17, the bending punch 261 and the bending counter-pressure plate 262 to complete the bending forming.

[0071] The in-mold transfer mechanism 3 is disposed on the upper surface of the die 24 and includes a transfer push plate 31, a slide rail 32, and a drive component 33. The transfer push plate 31 has a part cavity 34, which can slide back and forth between the blanking station 242 and the forming station 243. The part cavity 34 is used to accommodate the part 102 to be processed. The slide rail 32 is a linear guide rail, which is fixed in pairs on both sides of the upper surface of the die 24 and extends along the sliding direction of the transfer push plate 31, providing sliding guidance for the transfer push plate 31. The drive component 33 is disposed on the side of the mold and drives the transfer push plate 31 to slide back and forth. After the part 102 to be processed is punched at the blanking station 242, it is pushed into the transfer push plate 31 and then carried by the transfer push plate 31 to the forming station 243 for bending, realizing automatic in-mold transfer and avoiding surface damage and efficiency loss caused by manual transfer.

[0072] In addition, the fine blanking transfer die is also equipped with auxiliary components such as guide assembly 4, locking pin assembly 5, balance bar assembly 6, spring ejector pin 7, lower ejector rod assembly 8 and limit block assembly 9, which are used to ensure the coaxiality of the die opening, the locking of the die closing, the force balance, the elastic reset, the transmission of process force and the control of the bottom dead center position of the die closing.

[0073] The fine blanking transfer die is also equipped with a control system, which includes a programmable logic controller (PLC), die status sensors, cylinder position sensors, solenoid valve assemblies, and a material blockage sensor. The PLC, as the control core, receives sensor signals and outputs control commands. The die status sensors are installed on the fine blanking transfer die to detect its opening and closing status. Cylinder position sensors are installed on each cylinder to sense its extended or retracted position. The solenoid valve assemblies control the airflow reversal for each cylinder. The material blockage sensor monitors whether the material flow is unobstructed; when a blockage is detected, the system pauses operation and illuminates a red light, prompting manual intervention for maintenance. When the mold is in the open state, the solenoid valve controls the retraction of the transfer cylinder, pushing the transfer push plate 31 to the blanking station 242; after the transfer cylinder position sensor confirms that the cylinder is in place, it controls the fine blanking machine to apply back pressure to push the fine blanking back pressure plate 25 upward, so that the part to be bent 100 enters the transfer push plate 31; at the same time, another solenoid valve controls the ejection cylinder to eject, ejecting the formed part 101 to the upper surface of the die 24; after the ejection cylinder position sensor confirms that it is in place, the solenoid valve controls the transfer cylinder to eject, so that the transfer push plate 31 carries the part to be bent 100 to the forming station 243, and at the same time pushes the formed part 101 to the finished product area; when the transfer cylinder position sensor detects that the transfer cylinder has been pushed out to the correct position, it controls the fine blanking machine to perform the next stamping cycle.

[0074] Thus, by using the blanking station 242 and forming station 243 spaced longitudinally on the die 24, the blanking and bending processes are integrated into the same mold. The in-mold transfer mechanism 3 realizes the automatic transfer of the parts to be processed 102, eliminating the manual transfer process, avoiding surface damage, and significantly improving production efficiency and part consistency.

[0075] like Figure 9 and Figure 11 As shown, the transfer push plate 31 is provided with a sliding guide groove 311, which includes a middle guide groove 3111 and an end guide groove 3112. The width of the middle guide groove 3111 is greater than the width of the end guide groove 3112. A guide pin is fixedly provided on the die 24. The guide pin slides in cooperation with the inner wall of the sliding guide groove 311. When the transfer push plate 31 slides to the end of the stroke, the guide pin is precisely engaged with the inner wall of the end guide groove 3112.

[0076] A guide pin (i.e., a positioning pin retained in the central positioning hole during assembly) is fixedly installed on the die 24. The guide pin is located between the blanking station 242 and the forming station 243, passes through the sliding guide grooves 311 on both sides of the transfer push plate 31, and slides in engagement with the groove walls. Each side of the transfer push plate 31 has a sliding guide groove 311, each extending along the sliding direction of the transfer push plate 31, and its cross-section has a variable cross-section structure that is "wider in the middle and narrower at both ends." It includes a central guide groove 3111 located in the middle region and end guide grooves 3112 located at both ends. The width of the central guide groove 3111 is greater than the width of the end guide grooves 3112. The larger width of the central guide groove 3111 creates a larger gap between the guide pin and the groove wall during sliding, reducing frictional resistance and ensuring smooth movement of the transfer push plate 31. The end guide grooves 3112 are located at both ends of the sliding guide groove 311. The groove width is precisely matched with the outer diameter of the guide pin. When the transfer push plate 31 slides to the end of its stroke, the guide pin enters the end guide groove 3112 and forms a precise fit with the groove wall to achieve limiting and anti-collision. The difference in groove width between the middle guide groove 3111 and the end guide groove 3112 ensures that the transfer push plate 31 moves smoothly during sliding and is accurately positioned at the end of its stroke, thus balancing smooth movement and positioning accuracy.

[0077] In this way, the large gap in the middle section, the low frictional resistance, and the smooth movement, along with the precise fit at both ends to ensure the positioning accuracy at the end of the stroke, effectively solves the technical problem of balancing the positioning accuracy and smooth movement of the in-mold transmission mechanism 3.

[0078] like Figure 2 , Figure 3 and Figure 8 As shown, the bending punch 261 is set to correspond to the small-angle bending part of the part 102 to be processed; the bending counter-pressure plate 262 is connected to the forming cylinder independently set below the forming station 243, and the bending counter-pressure plate 262 is set to correspond to the main bending area of ​​the part 102 to be processed.

[0079] The bending punch 261 remains fixed during the bending process, providing rigid support for the small-angle bending area (referring to the bending area of ​​the workpiece 102 with a small bending angle and high requirements for rigid support). The bending counter-pressure plate 262 corresponds to the main bending area (referring to the main forming surface below the workpiece 102 after bending, which has a large area and requires uniform force). The forming cylinder is connected to the bending counter-pressure plate 262 through the forming cylinder push rod 28, and is driven by the forming cylinder to reciprocate in the vertical direction. Before bending, the forming cylinder drives the bending counter-pressure plate 262 to rise and support the workpiece 102; during bending, the bending counter-pressure plate 262 provides controllable counter-pressure; after bending, the bending counter-pressure plate 262 rises again to push out the formed workpiece 101.

[0080] Thus, the bending punch 261 provides rigid support for the small-angle bending section, and the bending counter-pressure plate 262 is driven by an independent cylinder to provide controllable counter-pressure during the bending process. Based on the positioning of the concave mold cavity 241, both ensure the stability and consistency of the bending forming.

[0081] According to some embodiments of this application, optionally, the blanking force, the blanking force applied by the blanking ring push rod 18 to the bending punch and die 17 and the blanking ring 15, the counter pressure on the fine blanking counter pressure plate 25, and the cylinder counter-pushing force applied by the forming cylinder to the bending counter pressure plate 262 are four sets of force systems that are independent of each other and are controlled separately.

[0082] The blanking force is provided by the main hydraulic cylinder of the fine blanking machine and acts on the fine blanking punch and die 16 to complete the blanking. The pressure applied by the blank holder push rod 18 to the bending punch and die 17 and the blank holder 15 is provided by the blanking press system of the fine blanking machine. That is, at the blanking station 242, it manifests as blank holder force, pressing the strip 210 to prevent lateral flow; at the forming station 243, it manifests as forming force, driving the bending punch and die 17 downward to complete the bending. The counter-pressure is provided by the fine blanking machine's counter-pressure system and acts on the fine blanking counter-pressure plate 25, causing the fine blanking counter-pressure plate 25 to push the workpiece 102 to be processed at the blanking station 242 upward. The cylinder counter-pushing force is provided by an independently set forming cylinder and acts on the bending counter-pressure plate 262, causing the bending counter-pressure plate 262 to provide counter-pushing force during the bending process. The four sets of force systems are independent of each other, provided by their respective power sources, and can independently adjust the magnitude and timing of the force without interfering with each other.

[0083] In this way, the four force systems of blanking, pressing, reverse pressing and bending reverse pressing are independent of each other and can be precisely controlled separately, avoiding mutual interference that could cause the parts to be flattened or not formed properly. This can meet the stamping requirements of various high-strength materials and is especially suitable for the mass production of high-precision stamped parts.

[0084] According to some embodiments of this application, optionally, the fine blanking die insert 271 and the bending die insert 272 are respectively detachably embedded in the die 24. The fine blanking die insert 271 and the bending die insert 272 are used to compensate for shape deviations caused by material property fluctuations, die wear or bending springback by grinding or replacement.

[0085] Both the fine blanking die insert 271 and the bending die insert 272 adopt an independent insert structure and are embedded in the die 24 with an interference fit. Each insert is detachably connected to the main body of the die 24. When an insert is worn or needs to be adjusted in shape, it can be removed from the die 24 individually for grinding or directly replaced with a new wire-cut insert. The insert design at the critical bending positions in the blanking and deformation areas allows for quick shape adjustment during the debugging phase by grinding or replacing the inserts, without the need for complete rework of the die 24.

[0086] During the mold debugging phase, due to factors such as fluctuations in material properties and unpredictable bending springback, the contour shape of the die 24 needs to be repeatedly adjusted. With the insert design, shape adjustment can be achieved simply by grinding or replacing the inserts at the corresponding positions, eliminating the need for a complete overhaul of the die 24. During mold use, if a single insert experiences localized wear, only that insert needs to be replaced, without needing to replace the entire die 24.

[0087] In this way, the debugging cycle is shortened by more than 60%, maintenance costs are significantly reduced, and shape deviations caused by material performance fluctuations, mold wear and springback changes can be effectively compensated by adjusting the position of the inserts.

[0088] like Figures 9 to 11 As shown, the upper surface of the transfer push plate 31 is provided with an anti-jump component 35. When the fine blanking counter-pressure plate 25 pushes the workpiece 102 into the transfer push plate 31, the anti-jump component 35 is used to restrict the workpiece 102 from detaching upwards. The bending punch and die 17 is provided with a clearance groove 171 at the position corresponding to the anti-jump component 35 of the transfer push plate 31. When the bending punch and die 17 moves downwards, the clearance groove 171 is used to avoid the anti-jump component 35.

[0089] An anti-jump component 35 is disposed at the edge of the opening of the part cavity 34 on the upper surface of the transfer push plate 31, corresponding to the contour of the part cavity 34. Multiple sets of anti-jump components 35 can be provided; in this embodiment, two sets are provided, located at opposite ends of the part cavity 34. When the fine blanking counter-pressure plate 25 pushes the workpiece 102 upwards into the part cavity 34 of the transfer push plate 31 from below, the workpiece 102 may continue to move upwards due to inertia and detach from the part cavity 34 due to the upward impact force. The anti-jump component 35, located above the opening of the part cavity 34, forms a barrier to the vertical upward movement of the workpiece 102, preventing it from ejecting from the mold transfer mechanism 3. The anti-jump component 35 can be implemented using an elastic pressure plate or an adhesive buffer material, limiting the bounce of the workpiece 102 without damaging its surface. The anti-jump component 35 only functions during the feeding stage of the unloading station 242. After the transfer push plate 31 carries the workpiece 102 to the forming station 243, the anti-jump component 35 no longer contacts the workpiece 102 and does not affect the subsequent forming process.

[0090] The clearance grooves 171 are located at the position of the bending die 17 directly opposite the anti-jump assembly 35 of the transfer push plate 31. Their number and position correspond one-to-one with the anti-jump assembly 35, and their shape and size are adapted to the anti-jump assembly 35. When the transfer push plate 31 carries the part 100 to be bent from the blanking station 242 to the forming station 243, the bending die 17 moves downward into the die area 24 to complete the bending action. The clearance grooves 171 provide a receiving space for the anti-jump assembly 35, so that the bending die 17 can be completely closed without interfering with or colliding with the anti-jump assembly 35.

[0091] Thus, the anti-jump component 35 prevents the workpiece 102 from popping out of the mold transfer mechanism 3 when it is pushed into the part cavity 34, ensuring the stability and reliability of the transfer process; the clearance groove 171 on the bending die 17 and the anti-jump component 35 on the transfer push plate 31 form a clearance fit when the mold is closed, effectively preventing interference between the bending die 17 and the anti-jump component 35 when the mold is closed, ensuring smooth mold closure.

[0092] like Figure 11 , Figure 12 and Figure 13 As shown, a part cavity 34 is provided on the transfer push plate 31. The outline dimension of the part cavity 34 is larger than the outer outline dimension of the part to be processed 102. The part cavity 34 is provided with a positioning short side 341 at the key outline. The positioning short side 341 abuts and cooperates with the key outline part of the part to be processed 102. A chamfered guide surface 342 is provided on the lower outline edge of the part cavity 34.

[0093] The part cavity 34 is located inside the transfer push plate 31, and its shape is adapted to the outer contour of the part 102 to be processed. The contour dimension of the part cavity 34 is larger than the outer contour dimension of the part 102 to be processed, adopting the design principle of overall part shape expansion to allow the part 102 to enter the part cavity 34 smoothly. A multi-segment short line precise positioning method is adopted, and positioning short sides 341 are set at the key contour. The key contour refers to the parts of the contour of the part 102 to be processed that have high positioning accuracy requirements, such as sharp corners, corners, and functional feature parts such as claws. The positioning short sides 341 form an abutting fit with the corresponding contour part of the part 102 to be processed, reducing frictional resistance while ensuring positioning accuracy. A chamfered guide surface 342 is provided on the lower contour edge of the part cavity 34, that is, the contour edge at the entrance of the part cavity 34 is chamfered. When the fine blanking counter-pressure plate 25 pushes the workpiece 102 into the part cavity 34 from below, the chamfered guide surface 342 guides the workpiece 102, assisting it to smoothly enter the part cavity 34. After entering the part cavity 34, the workpiece 102 is fixed inside the part cavity 34 by friction through the contour design of the part cavity 34, and will only fall under the action of force.

[0094] Thus, the outward expansion design of the part cavity 34 ensures that the part to be processed 102 can enter smoothly, the positioning short side 341 ensures positioning accuracy and reduces friction, and the chamfered guide surface 342 assists the part to be processed 102 to enter the part cavity 34. The three work together to achieve the precise accommodation and reliable fixation of the part to be processed 102 in the transfer push plate 31.

[0095] like Figure 1 , Figure 4 and Figure 5 As shown, the fine blanking die 16 is provided with a discharge channel 161 extending in the vertical direction. The upper backing plate 12 is provided with a discharge groove 121 and an air guide groove. The discharge channel 161 is connected to the discharge groove 121, and the air guide groove is connected to the discharge groove 121. The air guide groove is used to connect to an external air source.

[0096] The fine blanking die 16 has a vertically extending discharge channel 161. The lower end of the discharge channel 161 is connected to the cavity of the fine blanking die 16, and the upper end is connected to the discharge groove 121 in the upper backing plate 12. The upper backing plate 12 also has an air guide groove, which is connected to the discharge groove 121, and the air inlet end of the air guide groove is used to connect to an external high-pressure air source. The material 211 generated during the blanking process is discharged upward through the discharge channel 161 and enters the discharge groove 121 in the upper backing plate 12. The external high-pressure gas is introduced through the air guide groove, generating a strong airflow that blows the material 211 from the discharge groove 121 to the outside of the die along the transverse channel of the discharge groove 121, effectively preventing the material 211 from falling on the upper surface of the die 24 and affecting the operation of the internal transfer mechanism 3.

[0097] In this way, through the cooperation of the discharge channel 161, the discharge groove 121 and the air guide groove, the punching material 211 is actively discharged upward and directionally removed, avoiding the material 211 from falling on the upper surface of the die 24 and affecting the operation of the in-mold transmission mechanism 3, eliminating the risk of parts being crushed and the die being damaged caused by the material 211, and improving production stability and safety.

[0098] According to some embodiments of this application, optionally, the driving component 33 is a cylinder, and the cylinder has limiting components at both ends of its stroke. The limiting components are fixed on the die 24, and a buffer component is provided at the limiting component. When the cylinder moves to the end of its stroke, it abuts against the buffer component.

[0099] The driving component 33 is a cylinder located on the side of the mold, used to drive the transfer push plate 31 to reciprocate between the blanking station 242 and the forming station 243. Limiting components are provided at both ends of the cylinder's stroke, fixed to the die 24 and located at the corresponding positions at the end of the cylinder's stroke. A buffer component, which can be a spring, elastic washer, or hydraulic damper, is provided at the limiting component to absorb the remaining kinetic energy of the cylinder. When the cylinder drives the transfer push plate 31 to the end of its stroke, the end of the cylinder first abuts against the buffer component, compressing it and absorbing the remaining kinetic energy of the cylinder, thus providing a buffering effect. If the buffer component is fully compressed, the end of the cylinder then abuts against the limiting component, which rigidly limits the end of the cylinder's stroke. The buffer component and the limiting component work together to reduce impact force and protect the cylinder and transmission mechanism.

[0100] like Figure 14 and Figure 15As shown, a positioning structure is provided between the die 24 and the transfer push plate 31. The die 24 has three sets of positioning holes 244, corresponding to the middle and end positions of the sliding stroke of the transfer push plate 31. During assembly, positioning pins are inserted into the positioning holes 244 of the die 24 and the sliding guide grooves 311 of the transfer push plate 31 to precisely position the die 24 and the transfer push plate 31. The movement accuracy of the transfer push plate 31 on the slide rail 32 is adjusted so that the transfer push plate 31 can be vertically aligned with the die 24 at both the blanking station 242 and the forming station 243. After positioning, the fixing screws of the slide rail 32 are tightened, and the positioning pins at both ends are removed, leaving the positioning pin (i.e., the guide pin) at the middle position. The positioning pin (i.e., the guide pin) retained at the middle position cooperates with the sliding guide groove 311 during the sliding process of the transfer push plate 31 to guide and limit the transfer push plate 31.

[0101] In this way, the precise positioning during assembly ensures the movement accuracy of the transfer push plate 31 on the slide rail 32, and ensures that the transfer push plate 31 is aligned vertically with the die 24 after sliding into place.

[0102] According to some embodiments of this application, please refer to Figures 1 to 15 This embodiment also relates to a fine blanking transfer forming method, which uses the above-mentioned fine blanking transfer die and includes the following steps:

[0103] S1: The strip 210 is fed laterally into the blanking station 242, the upper die mechanism 1 and the lower die mechanism 2 are closed, the pressure ring 15 presses the strip 210, and the fine blanking punch 16, the fine blanking punch 29 and the fine blanking die insert 271 cooperate to perform fine blanking to obtain the part to be bent 100.

[0104] S2: Open the upper mold mechanism 1 and the lower mold mechanism 2, and drive component 33 drives the transmission push plate 31 to slide longitudinally to the blanking station 242;

[0105] S3: The fine blanking counter-pressure plate 25 moves upward and pushes the part to be bent 100 into the transfer push plate 31; at the same time, the bending counter-pressure plate 262 moves upward and pushes the formed part 101 out from the forming station 243.

[0106] S4: The driving component 33 drives the transfer push plate 31 to slide longitudinally from the blanking station 242 to the forming station 243. The transfer push plate 31 transfers the part to be bent 100 to the forming station 243 and pushes the formed part 101 to the finished product area.

[0107] S5: Close the upper die mechanism 1 and the lower die mechanism 2 again. The bending punch and die 17 moves downward with the pressure ring 15. The bending counter-pressure plate 262 provides an upward counter-force. The bending punch and die 17, the bending die insert 272 and the bending counter-pressure plate 262 work together to bend and form the part 100 to be bent. At the same time, the blanking station 242 performs fine blanking on the next strip 210.

[0108] S6: Repeat S2 to S5 to achieve continuous cyclic stamping.

[0109] like Figure 6 As shown below, the specific implementation methods for each step will be further described in detail:

[0110] In step S1, the feeder feeds the strip 210 laterally into the blanking station 242 at a step distance of 69mm. The upper die mechanism 1 and the lower die mechanism 2 close, and the blank holder 15 first contacts the strip 210 and presses it against the upper surface of the die 24 to reduce the lateral flow of material during the blanking process. Subsequently, the fine blanking punch and die 16 continue to move downward, cooperating with the fine blanking punch 29 and the fine blanking die insert 271 embedded in the die 24, and completes the fine blanking under the combined action of strong blanking force and counter-clamping force to obtain the part 100 to be bent. The blanking pellets 211 generated during blanking are discharged upward through the discharge channel 161 to avoid falling onto the upper surface of the die 24 and affecting the operation of the transmission mechanism.

[0111] In step S2, the upper mold mechanism 1 and the lower mold mechanism 2 are opened, and the driving component 33 drives the transfer push plate 31 to slide longitudinally along the slide rail 32 to the blanking station 242, so that the part cavity 34 on the transfer push plate 31 is aligned with the concave mold cavity 241 of the blanking station 242.

[0112] In step S3, the fine blanking counter-pressure plate 25 moves upward under the action of counter-pressure, pushing the part 100 to be bent in the die 24 of blanking station 242 into the part cavity 34 of the transfer push plate 31. The die 24 has a stepped structure to limit the upward height of the ejector rod, ensuring that the part 100 to be bent is fully inserted into the part cavity 34 of the transfer push plate 31 after the fine blanking counter-pressure plate 25 is in place. The anti-jump component 35 on the upper surface of the transfer push plate 31 prevents the part 102 to be processed from detaching upward during the ejection process. Simultaneously, the bending counter-pressure plate 262 moves upward through the forming cylinder ejector rod 28, driven by the forming cylinder, ejecting the already formed part 101 from the die 24 of forming station 243 to the upper surface of the die 24. The ejection actions of the two stations are performed synchronously.

[0113] In step S4, the drive unit 33 drives the transfer push plate 31 to slide longitudinally from the blanking station 242 75mm to the forming station 243. The transfer push plate 31 carries the part to be bent 100 along with it, transferring it to the forming station 243. During the sliding process of the transfer push plate 31, the front end face of the transfer push plate 31 along the sliding direction pushes the formed part 101, which has been ejected to the upper surface of the die 24, horizontally to the finished product area. At the same time, the feeder feeds the next strip 210 laterally into the blanking station 242.

[0114] In step S5, the upper die mechanism 1 and the lower die mechanism 2 close again. The bending punch and die 17 move downward with the pressure ring 15, and the bending counter-pressure plate 262 provides an upward counter-force. The bending punch and die 17, the bending die insert 272, and the bending counter-pressure plate 262 work together to bend and form the part 100 to be bent. At the same time, the fine blanking punch and die 16 cooperate with the fine blanking die insert 271 to perform fine blanking on the next strip 210 that has been fed into the blanking station 242 to obtain the next part 100 to be bent. After forming is completed, the bending counter-pressure plate 262 retracts, and the formed part 101 remains in the die 24.

[0115] In step S6, steps S2 to S5 are repeated to achieve continuous cyclic stamping. Each stroke completes the full process of processing one part.

[0116] Thus, by using a composite feeding method that combines transverse feeding with longitudinal transfer, the blanking and bending processes are integrated within a limited mold space, avoiding manual transfer and the investment of two sets of molds, and realizing high-quality, high-efficiency continuous automated production of complex precision blanking parts; through independent force system design, the blanking force, blank holder force, counter pressure and cylinder counter-jacking force are made independent and controlled separately, further improving the forming accuracy.

[0117] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of the present invention, or equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A fine blanking transfer die, characterized in that, include: The upper die mechanism includes an upper die base, an upper pad, an upper fixed plate, a blank holder, a blank holder, a fine blanking die, and a bending die. The upper die base, the upper pad, the upper fixed plate, and the blank holder are arranged sequentially from top to bottom. The blank holder is disposed in the blank holder and can float relative to the blank holder. The fine blanking die is fixed to the upper pad, and the bending die is fixed to the blank holder and moves synchronously with the blank holder to bend and form the shape driven by the blank holder force. The lower die mechanism, disposed opposite to the upper die mechanism, includes a lower die base, a lower backing plate, a lower fixing plate, a die cavity, a fine blanking counter-pressure plate, a bending punch, a bending counter-pressure plate, a fine blanking die insert, a bending die insert, and a fine blanking punch. The lower die base, the lower backing plate, the lower fixing plate, and the die cavity are arranged sequentially from bottom to top. The bending punch is fixed to the lower backing plate. The fine blanking counter-pressure plate and the bending counter-pressure plate are disposed within the die cavity. The fine blanking die insert and the bending die insert are embedded within the die cavity. The fine blanking punch is fixed to the lower backing plate. The die is provided with blanking station and forming station at intervals along the longitudinal direction. The fine blanking punch and die, the fine blanking die insert, the fine blanking punch and the fine blanking counter-pressure plate cooperate to complete blanking at the blanking station. The bending punch and die, the bending die insert, the bending punch and the bending counter-pressure plate cooperate to complete bending and forming at the forming station. An in-mold transfer mechanism is disposed on the upper surface of the die cavity, including a transfer push plate, a slide rail, and a driving component. The slide rail is fixed to the die cavity and defines the sliding path of the transfer push plate. The driving component is connected to the transfer push plate and drives the transfer push plate to reciprocate between the blanking station and the forming station.

2. The fine blanking transfer die according to claim 1, characterized in that, The transfer push plate is provided with a sliding guide groove, which includes a middle guide groove and an end guide groove. The width of the middle guide groove is greater than the width of the end guide groove. A guide pin is fixedly provided on the die cavity. The guide pin slides in cooperation with the inner wall of the sliding guide groove. When the transfer push plate slides to the end of the stroke, the guide pin is precisely engaged with the inner wall of the end guide groove.

3. The fine blanking transfer die according to claim 1, characterized in that, The bending punch is set to correspond to the small-angle bending part of the part to be processed; the bending counter-pressure plate is connected to the forming cylinder independently set below the forming station, and the bending counter-pressure plate is set to correspond to the main bending area of ​​the part to be processed.

4. The fine blanking transfer die according to claim 3, characterized in that, The blanking force, the blanking force applied by the blanking ring push rod to the bending punch and die and the blanking ring, the counter pressure on the fine blanking counter pressure plate, and the cylinder counter-pushing force applied by the forming cylinder to the bending counter pressure plate are four independent force systems that are controlled separately.

5. The fine blanking transfer die according to claim 1, characterized in that, The fine blanking die insert and the bending die insert are respectively detachably embedded in the die. The fine blanking die insert and the bending die insert are used to compensate for shape deviations caused by material property fluctuations, die wear or bending springback by grinding or replacement.

6. The fine blanking transfer die according to claim 1, characterized in that, The upper surface of the transfer push plate is provided with an anti-jump component. When the fine blanking counter-pressure plate pushes the work to be processed into the transfer push plate, the anti-jump component is used to prevent the work to be processed from detaching upwards. The bending die has a clearance groove at the position corresponding to the anti-jump component of the transfer push plate. When the bending die moves downward, the clearance groove is used to avoid the anti-jump component.

7. The fine blanking transfer die according to claim 1, characterized in that, The transfer push plate has a part cavity, the outline size of which is larger than the outer outline size of the part to be processed. The part cavity has a positioning short side at the key outline, which abuts against the key outline part of the part to be processed. The lower outline edge of the part cavity has a chamfered guide surface.

8. The fine blanking transfer die according to claim 1, characterized in that, The precision blanking die is provided with a discharge channel extending in the vertical direction. The upper pad is provided with a discharge groove and an air guide groove. The discharge channel is connected to the discharge groove, and the air guide groove is connected to the discharge groove. The air guide groove is used to connect to an external air source.

9. The fine blanking transfer die according to claim 1, characterized in that, The driving component is a cylinder, and the cylinder has limiting components at both ends of its stroke. The limiting components are fixed to the die. A buffer component is provided at the limiting component. When the cylinder moves to the end of its stroke, it abuts against the buffer component.

10. A fine blanking transfer forming method, characterized in that, The fine blanking transfer die according to any one of claims 1 to 9 comprises the following steps: S1: The strip is fed into the blanking station laterally, the upper die mechanism and the lower die mechanism are closed, the pressure ring presses the strip, and the fine blanking punch, the fine blanking punch head and the fine blanking die insert cooperate to perform fine blanking to obtain the part to be bent. S2: Open the upper mold mechanism and the lower mold mechanism, and the driving component drives the transfer push plate to slide longitudinally to the blanking station; S3: The fine blanking counter-pressure plate moves upward to push the part to be bent into the transfer push plate; at the same time, the bending counter-pressure plate moves upward to push the formed part out from the forming station. S4: The driving component drives the transfer pusher to slide longitudinally from the blanking station to the forming station. The transfer pusher transfers the part to be bent to the forming station and pushes the formed part to the finished product area. S5: Close the upper die mechanism and the lower die mechanism again. The bending dies and punches move downward with the pressure ring. The bending counter-pressure plate provides an upward counter-force. The bending dies and punches, the bending die insert, and the bending counter-pressure plate work together to bend and form the part to be bent. At the same time, the blanking station performs fine blanking on the next strip of material. S6: Repeat S2 to S5 to achieve continuous cyclic stamping.

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