A blanking die

Abstract

This application discloses a blanking forming die comprising: an upper die assembly; a lower die assembly spaced apart from the upper die assembly, the upper die assembly reciprocating relative to the lower die assembly to blank a workpiece; and a heating assembly including a heating element disposed between the upper die assembly and the lower die assembly for heating the blanking area of ​​the workpiece. During the reciprocating motion of the upper die assembly, the heating element is activated when the distance between the upper die assembly and the lower die assembly is greater than or equal to a target distance; and deactivated when the distance is less than the target distance. This application, by setting a heating assembly between the upper and lower die assemblies and controlling the activation and deactivation of the heating element based on the distance, achieves localized heating of the blanking area of ​​high-strength steel, significantly improving material plasticity and making the shearing process primarily plastic deformation, thereby fundamentally avoiding micro-cracks and fissures at the blanking edge.

Description

Technical Field

[0001] This application relates to the field of sheet metal blanking technology, and in particular to a blanking forming die. Background Technology

[0002] Lightweighting of vehicle bodies has become a future development trend. To achieve lightweighting, it is also necessary to ensure the safety of the vehicle body in the event of a collision. To meet both of these requirements, high-strength steel is widely used in the automotive manufacturing industry.

[0003] However, high-strength steel has low plasticity. When using traditional molds for blanking, the sheared edges of the sheet are prone to cracking or even cracking under the punching force of the press, affecting product quality and structural strength. These problems urgently need to be solved. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a blanking forming die to heat the blanking area of ​​the workpiece, thereby improving plasticity and ensuring the quality of the blanking edge.

[0005] This application provides a blanking forming die including: Upper mold component; The lower die assembly is spaced apart from the upper die assembly. The upper die assembly reciprocates relative to the lower die assembly to punch the workpiece. A heating assembly, including a heating element, is disposed between the upper mold assembly and the lower mold assembly for heating the blanking area of ​​the workpiece; During the reciprocating lifting and lowering process of the upper mold assembly, the heating element is activated when the distance between the upper mold assembly and the lower mold assembly is greater than or equal to the target distance. The heating element shuts off when the spacing is less than the target spacing.

[0006] In some embodiments, the heating assembly further includes: A power supply component, which includes a first electrical connection portion; The heating element includes a second electrical connection portion that is electrically connected to the first electrical connection portion; When the spacing is greater than or equal to the target spacing, the first electrical connection part is connected to the second electrical connection part, and the heating element and the power supply part are connected for heating. When the distance is less than the target distance, the first electrical connection part separates from the second electrical connection part, and the heating element and the power supply part are disconnected and stopped.

[0007] In some embodiments, the heating element includes a heating part, a first conductive part, and a second conductive part; The heating element is spaced apart from and corresponding to the lower mold assembly. The heating element is used to heat the workpiece placed between the heating element and the lower mold assembly. One end of the first conductive part is electrically connected to one end of the heating part, and the other end of the first conductive part is connected to the second electrical connection part. One end of the second conductive part is electrically connected to the other end of the heating part, and the other end of the second conductive part is connected to the second electrical connection part.

[0008] In some embodiments, it further includes: a transmission assembly connected between the upper mold assembly and the lower mold assembly; The transmission assembly includes a transmission component, one end of which is connected to the upper mold assembly, and the other end of which is connected to the second electrical connection part; When the upper mold assembly reciprocates relative to the lower mold assembly, the transmission component drives the second electrical connection part to move closer to or away from the first electrical connection part.

[0009] In some embodiments, the transmission assembly further includes: a first guide frame, the first guide frame being disposed on the lower mold assembly, the first guide frame having a first slide rail, the extension direction of the first slide rail intersecting the movement direction of the upper mold assembly; The first end of the transmission component is rotatably connected to the upper mold assembly, the second end of the transmission component is slidably disposed in the first slide rail, and one end of the heating component passes through the first slide rail and is connected to the second end. When the upper mold assembly reciprocates relative to the lower mold assembly, the second end of the transmission component drives the heating component to reciprocate within the first slide rail, so that the second electrical connection part moves closer to or further away from the first electrical connection part.

[0010] In some embodiments, the first guide frame is further provided with a second slide, the extension direction of the second slide is the same as the movement direction of the upper mold assembly, the first end of the transmission member passes through the second slide and is rotatably connected to the upper mold assembly, and follows the lifting and lowering movement of the upper mold assembly, reciprocating along the second slide.

[0011] In some embodiments, the device further includes a first elastic member disposed on the first electrical connection portion and / or the second electrical connection portion, wherein when the distance is greater than the target distance, the second electrical connection portion continuously moves closer to the first electrical connection portion to compress the first elastic member.

[0012] In some embodiments, the transmission assembly further includes a second guide frame; The second guide frame is spaced apart from the first guide frame in the lower mold assembly. The second guide frame has a third slide. The extension directions of the third slide, the first slide, and the second slide are perpendicular to each other. The other end of the heating element passes through the second guide frame via the third slide.

[0013] In some embodiments, the second guide frame further includes a guide sleeve disposed in the third slide, and the axial direction of the guide sleeve is the same as the extension direction of the first slide.

[0014] In some embodiments, the first guide frame is provided with a first abutting member, which passes through at least one side wall of the first guide frame and is threadedly connected to the side wall of the first guide frame. The second guide frame is provided with a second abutment member, which passes through at least one side wall of the first guide frame and is threadedly connected to the side wall of the second guide frame.

[0015] Compared with the prior art, this application achieves local heating of the high-strength steel blanking area by setting a heating component between the upper and lower die components and controlling the start and stop of the heating component based on the spacing. This significantly improves the plasticity of the material and makes the shearing process mainly plastic deformation, thereby fundamentally avoiding micro-cracks and cracks at the blanking edge. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of the blanking forming die according to an embodiment of this application; Figure 2 This is a second-view structural schematic diagram of the blanking forming die according to an embodiment of this application; Figure 3 This is a schematic diagram of the assembly of the transmission component and the heating component according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating that the distance between the upper mold assembly and the lower mold assembly in an embodiment of this application is greater than the target distance; Figure 5 Examples of embodiments of this application Figure 4 The diagram shown illustrates the states of the first and second electrical connection terminals in the given scenario. Figure 6 This is a schematic diagram illustrating that the distance between the upper mold assembly and the lower mold assembly in an embodiment of this application is equal to the target distance; Figure 7 Examples of embodiments of this application Figure 6 The diagram shown illustrates the states of the first and second electrical connection terminals in the given scenario. Figure 8 This is a schematic diagram illustrating that the distance between the upper mold assembly and the lower mold assembly in an embodiment of this application is less than the target distance; Figure 9 Examples of embodiments of this application Figure 8 The diagram shows the state of the first electrical connection terminal and the second electrical connection terminal in the case shown.

[0017] Figure label: 10. Upper mold assembly; 11. Upper mold component; 12. Pressure plate; 13. Limiting guide component; 14. Upper pressure plate 20. Lower mold assembly; 21. Lower mold component; 22. Second elastic element; 23. Lower pressure plate; 30. Heating assembly; 31. Heating element; 311. Second electrical connection; 312. Heating part; 313. First conductive part; 314. Second conductive part; 32. Power supply element; 321. First electrical connection; 40. Transmission assembly; 41. Transmission component; 42. First guide frame; 421. First slide rail; 422. Second slide rail; 43. Second guide frame; 431. Third slide rail; 432. Guide sleeve; 50. First elastic element; 60. First abutting element; 70. Second abutting element. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] High-strength steel achieves high strength through alloying, phase transformation strengthening, and other methods, but this is usually accompanied by a decrease in elongation and lower plasticity. When using traditional molds for blanking, the blanking edge of the sheet metal is prone to cracking or even cracking under the punching force of the press, which seriously affects the durability and safety of the structural components.

[0021] The blanking forming module disclosed herein heats the blanking area of ​​the workpiece locally before blanking and stops heating when blanking occurs.

[0022] like Figures 1-9 As shown, this application provides a blanking forming die, including: Upper mold component 10; The lower die assembly 20 is spaced apart from the upper die assembly 10. The upper die assembly 10 reciprocates relative to the lower die assembly 20 to punch the workpiece. The heating assembly 30 includes a heating element 31, which is disposed between the upper mold assembly 10 and the lower mold assembly 20 and is used to heat the blanking area of ​​the workpiece. During the reciprocating lifting and lowering process of the upper mold assembly 10, the heating element 31 is activated when the distance between the upper mold assembly 10 and the lower mold assembly 20 is greater than or equal to the target distance. If the spacing is less than the target spacing, the heating element 31 is turned off.

[0023] Understandably, the upper mold assembly 10 includes an upper mold base, an upper mold component 11, and a pressure plate 12; The lower mold assembly 20 includes a lower mold base, a lower mold component 21, and an elastic element for ejecting material. The upper mold assembly 10 and the lower mold assembly 20 are connected by guide pillars and guide sleeves to ensure precise alignment. The connection method between the upper mold assembly 10 and the lower mold assembly 20 via guide pillars and guide sleeves is prior art in this field and will not be elaborated here.

[0024] The blanking forming module, which is composed of the upper die assembly 10 and the lower die assembly 20, is used to cut and / or stamp workpieces, such as sheet metal, and to shear and separate workpieces to obtain the target product.

[0025] The upper die assembly 10 is mounted on the slide of the press and moves up and down reciprocally with the slide. The lower die assembly 20 is fixed to the worktable of the press and remains stationary.

[0026] The upper mold 11 and the lower mold 21 can be staggered, and the staggered and adjacent parts of the two form a shearing edge for cutting the blanking area of ​​the sheet metal.

[0027] The pressure plate 12 is used to press the sheet metal before punching to prevent the sheet metal from moving or warping.

[0028] The heating element 31 of the heating assembly 30 can be an electromagnetic induction coil, or a resistance heating rod or heating plate, located between the upper mold assembly 10 and the lower mold assembly 20, and close to the shearing edge formed by the misalignment of the upper mold 11 and the lower mold 21. The shape of the heating element 31 can match the contour of the blanking area of ​​the sheet metal, ensuring that the heating of the heating element 31 can evenly cover the blanking area of ​​the sheet metal.

[0029] The working principle of blanking forming die is as follows: Heating elements 31 can be spaced out on the lower mold 21, with one part of the plate placed between the heating elements 31 and the lower mold 21, and the other part of the plate placed between the upper mold 11 and the pressure plate 12.

[0030] The press drives the upper mold assembly 10 to reciprocate up and down relative to the lower mold assembly 20.

[0031] The upper mold component 11 of the upper mold assembly 10 and the lower mold component 21 of the lower mold assembly 20 can be staggered. The press drives the upper mold assembly 10 to descend continuously, causing the upper mold component 11 and the lower mold component 21 to intersect. When the lower surface of the upper mold 11 and the upper surface of the lower mold 21 are on the same horizontal plane, a shearing edge is formed between the upper mold 11 and the lower mold 21. The heating element 31 is located near the shearing edge to locally heat the blanking area of ​​the sheet metal. The outline and size of the shearing edge correspond to the blanking area of ​​the sheet metal.

[0032] The upper mold 11 continues to descend. When the lower surface of the upper mold 11 is lower than the upper surface of the upper mold 11, the upper mold 11 and the lower mold 21 move alternately to cut the sheet metal.

[0033] The reciprocating lifting of the upper mold assembly 10 relative to the lower mold assembly 20 is combined with the heating element 31 heating the blanking area of ​​the sheet metal.

[0034] like Figures 4-7 As shown, when the distance between the upper mold assembly 10 and the lower mold assembly 20 is greater than or equal to the preset target distance, the lower surface of the upper mold 11 does not contact the sheet metal. At this time, the heating element 31 continuously generates heat, which heats the blanking area of ​​the sheet metal below the heating element 31 through thermal radiation. Within a certain period of time, the blanking area of ​​the sheet metal is raised from room temperature to the target temperature, which significantly reduces the yield strength of the sheet metal and improves its plasticity.

[0035] As the upper mold component 10 continues to descend.

[0036] like Figures 8-9 As shown, the heating component 30 shuts off the instant the distance between the upper mold assembly 10 and the lower mold assembly 20 transitions from equal to to less than the target distance. After heating stops, sufficient heat accumulates in the blanking area of ​​the sheet material, at which point the material is in its optimal plastic state.

[0037] Furthermore, the sheet material is pressed by the upper mold 11 and the pressure plate 12. As the upper mold 11 continues to descend, this part of the sheet material and the pressure plate 12 follow the upper mold template downward. At this time, the lower surface of the upper mold 11 and the upper surface of the lower mold 21 are coplanar, and the sides of the upper mold 11 and the lower mold 21 are aligned to form a complete cutting profile, so as to start cutting the sheet material blanking area.

[0038] As the upper mold assembly 10 continues to descend, the lower surface of the upper mold 11 is lower than the upper surface of the lower mold 21, and the two begin to slide and cut in a staggered manner. The shearing edge formed by the upper mold 11 and the lower mold 21 is similar to scissors, smoothly shearing the heated and softened sheet material. The softened sheet material has good fluidity and ductility, resulting in uniform shear deformation and effectively suppressing micro-cracks.

[0039] After shearing is completed, the press drives the upper die assembly 10 to rise and detach from the workpiece. The heating assembly 30 remains off until the upper die assembly 10 moves to a distance equal to the target distance between it and the lower die assembly 20. Then the heating assembly 30 is restarted and the heating element 31 begins to heat.

[0040] This application achieves localized heating of the high-strength steel blanking area by setting a heating component 30 between the upper die assembly 10 and the lower die assembly 20 and controlling the start and stop of the heating component 31 based on the spacing. This significantly improves the plasticity of the material and makes the shearing process mainly plastic deformation, thereby fundamentally avoiding micro-cracks and cracks at the blanking edge.

[0041] In some embodiments, such as Figures 1-3 As shown, the heating assembly 30 also includes a power supply component 32, which includes a first electrical connection portion 321. The heating element 31 includes a second electrical connection portion 311 that is electrically connected to the first electrical connection portion 321; When the spacing is greater than or equal to the target spacing, the first electrical connection 321 is connected to the second electrical connection 311, and the heating element 31 is connected to the power supply element 32 for heating. When the distance is less than the target distance, the first electrical connection 321 separates from the second electrical connection 311, and the heating element 31 and the power supply element 32 are disconnected and stopped.

[0042] Understandably, the heating element 31 is heated and turned off through the physical contact and separation of the first electrical connection part 321 and the second electrical connection part 311.

[0043] The power supply unit 32 serves as a power supply unit, providing electrical energy for the heating element 31. Internally, a high-power contactor or solid-state relay serves as the core switching element, responsible for ultimately connecting or disconnecting the heating power supplied to the blanking die.

[0044] The first electrical connection part 321 serves as the control line lead-out terminal of the main switch inside the power supply unit 32, and is fixedly installed on one side of the blanking forming module or on the side of the lower mold base.

[0045] The second electrical connection part 311 moves synchronously with the upper mold assembly 10; When the distance between the upper mold assembly 10 and the lower mold assembly 20 is the target distance, the first electrical connection 321 and the second electrical connection 311 make physical contact, for example, the probe of the second electrical connection 311 is inserted into the socket of the first electrical connection 321. At this time, current flows instantaneously from the power supply component 32 to the heating component 31, and heating begins. The target distance also serves as the trigger current for the power supply component 32 to heat the heating component 31.

[0046] When the upper mold assembly 10 continues to move away from the lower mold assembly 20, the distance between the two is greater than the target distance. At this time, the second electrical connection part 311 continues to contact the first electrical connection part 321, and the power supply part 32 continues to heat the heating part 31.

[0047] When the upper mold assembly 10 approaches the lower mold assembly 20, until the distance between them is less than the target distance, the second electrical connection 311 separates from the upper mold assembly 10 due to the movement of the upper mold assembly 10. Heating immediately stops. At this point, the blanking area of ​​the sheet has received the required heat energy and is in the optimal plastic state.

[0048] As the upper mold assembly 10 continues to move downward, when the lower surface of the upper mold 11 is coplanar with the upper surface of the lower mold 21, the shearing edge formed by the upper mold 11 and the lower mold 21 cuts the blanking area of ​​the sheet metal.

[0049] In some embodiments, such as Figures 1-3 As shown, the heating element 31 includes: a heating part 312, a first conductive part 313, and a second conductive part 314; The heating part 312 is spaced apart from and correspondingly disposed with the lower mold assembly 20. The heating part 312 is used to heat the workpiece placed between the heating part 312 and the lower mold assembly 20. One end of the first conductive part 313 is electrically connected to one end of the heating part 312, and the other end of the first conductive part 313 is connected to the second electrical connection part 311; One end of the second conductive part 314 is electrically connected to the other end of the heating part 312, and the other end of the second conductive part 314 is connected to the second electrical connection part 311.

[0050] Understandably, the heating element 312 is used for direct heating, heating the workpiece by heat conduction or radiation through direct or non-contact means.

[0051] The heating element 312 can convert electrical energy into heat energy. It can be a resistance wire, a resistance sheet, or an induction coil. The shape of the heating element 312 corresponds to the outline of the workpiece's blanking area.

[0052] The first conductive part 313 is connected to one end of the heating part 312, serving as one side of the current loop, and the second conductive part 314 is connected to the other end of the heating part 312, serving as the other side of the current loop. Both the first conductive part 313 and the second conductive part 314 are conductive materials of a certain length, such as copper busbars or high-temperature resistant cables. One end of the first conductive part 313 is fixedly connected to one electrode of the heating part 312, and the other end is connected to the second electrical connection part 311. One end of the second conductive part 314 is connected to the other electrode of the heating part 312, and the other end is also connected to the second electrical connection part 311.

[0053] The first conductive part 313 and the second conductive part 314 together connect the heating part 312 to the power supply network composed of the power supply component 32 and the second electrical connection part 311.

[0054] like Figure 5 and Figure 7 As shown, when the distance between the upper mold assembly 10 and the lower mold assembly 20 is greater than or equal to the target spacing, the first electrical connection portion 321 contacts the second electrical connection portion 311 of the heating element 31.

[0055] At this time, the current flows from the power supply component 32 through the first electrical connection part 321, the second electrical connection part 311, the first conductive part 313, the heating part 312, the second conductive part 314, the second electrical connection part 311, the first electrical connection part 321, and then back to the power supply component 32.

[0056] The power supply component 32 and the first electrical connection part 321 are further connected by two wires. One wire is connected to the first electrical connection part 321 at both ends and to the power supply component 32 at the other end. The other wire is similar, with one end connected to the first electrical connection part 321 and the other end connected to the power supply component 32.

[0057] Both the first electrical connection part 321 and the second electrical connection part 311 serve as terminal blocks; The first electrical connection part 321 can bring together the wires that are connected to the two stages of the power supply unit 32 to form an electrical interface; Similarly, the second electrical connection 311 can bring together the first conductive part 313 and the second conductive part 314 from the two stages of the heating part 312 to form an electrical interface. The power supply unit 32 heats the heating element 31 by contacting the two electrical interfaces.

[0058] In some embodiments, a transmission assembly 40 is also included, connected between the upper mold assembly 10 and the lower mold assembly 20; The transmission assembly 40 includes a transmission member 41, one end of which is connected to the upper mold assembly 10, and the other end is connected to the second electrical connection part 311. When the upper mold assembly 10 reciprocates up and down relative to the lower mold assembly 20, the transmission component 41 drives the second electrical connection part 311 to move closer to or away from the first electrical connection part 321.

[0059] Understandably, the transmission component 41 can be a rigid connecting rod, with one end hinged to the upper mold assembly 10 and the other end connected to the second electrical connection part 311, and driving the second electrical connection part 311 to move along a specific trajectory to move closer to or further away from the first electrical connection part 321.

[0060] In some embodiments, such as Figure 3 As shown, the transmission assembly 40 also includes: a first guide frame 42, which is disposed on the lower mold assembly 20. The first guide frame 42 has a first slide rail 421, and the extension direction of the first slide rail 421 intersects with the movement direction of the upper mold assembly 10. The first end of the transmission component 41 is rotatably connected to the upper mold assembly 10, and the second end of the transmission component 41 is slidably disposed in the first slide rail 421. One end of the heating component 31 passes through the first slide rail 421 and is connected to the second end. When the upper mold assembly 10 reciprocates up and down relative to the lower mold assembly 20, the second end of the transmission member 41 drives the heating member 31 to reciprocate within the first slide rail 421, so that the second electrical connection part 311 moves closer to or further away from the first electrical connection part 321.

[0061] Understandably, the first guide frame 42 is a rigid support fixed to the lower mold assembly 20; The first slide rail 421 has a strip-shaped hole on the first guide frame 42, and its extension direction intersects with the movement direction of the upper mold assembly 10. The upper mold assembly 10 can move in the vertical direction, and the first slide rail 421 can be set in the horizontal direction.

[0062] The first end of the transmission component 41 is connected to the upper mold assembly 10 via a revolute joint, such as a hinge or a pin, so that the transmission component 41 can rotate freely relative to the upper mold assembly 10. The second end of the transmission component 41 is constrained within the first slide rail 421 by a sliding joint and moves reciprocally along the first slide rail 421. The second end of the transmission component 41 may be annular, and an annular groove may be formed on the outer wall of the annular ring along the outer periphery of the second end. The groove is embedded in the inner edge of the first slide rail 421, allowing the second end to slide stably within the first slide rail 421. The heating element 31 passes through the inner ring of the second end of the transmission component 41 and slides along with the second end within the first groove.

[0063] like Figure 4 and Figure 3 As shown, in the initial state, the upper mold component 10 is at its highest point, and the distance between the upper mold component 10 and the lower mold component 20 is greater than the target spacing.

[0064] At this time, the transmission component 41 is close to a vertical state, and the second end of the transmission component 41 is located at the rightmost end of the first slide rail 421. At the same time, the second electrical connection 311 of the heating element 31 comes into contact with the first electrical connection 321, the circuit is connected, and the heating element 312 is in a heating state; The upper mold assembly 10 moves vertically downward, causing the first end of the transmission component 41 to descend synchronously.

[0065] Since the length of the transmission component 41 is fixed and the second end is constrained to the first slide rail 421, the second end does not fall vertically with the first end, but slides to the left along the horizontally set first slide rail 421. Thus, the vertical downward movement of the upper mold assembly 10 is converted by the transmission member 41 into a horizontal linear movement to the left at the second end. Since the heating member 31 passes through the second end of the ring, the second end of the transmission member 41 drives the heating member 31 to move to the left, so that the second electrical connection portion 311 of the heating member 31 gradually moves away from the first electrical connection portion 321.

[0066] like Figure 6 and Figure 7 As shown, the first electrical connection 321 and the second electrical connection 311 reach the critical point of contact when the distance between the upper mold assembly 10 and the lower mold assembly 20 reaches the target spacing.

[0067] like Figure 8 and Figure 9 As shown, the upper mold assembly 10 continues to descend, and the distance between it and the lower mold assembly 20 is less than the target distance. The second end of the transmission member 41 continues to move to the left, causing the second electrical connection 311 to disconnect from the first electrical connection 321. At this time, the heating member 31 stops heating. The upper mold assembly 10 and the lower mold assembly 20 enter the shearing stage.

[0068] The upper mold component 10 rises, and the entire process is carried out in reverse.

[0069] The second end of the transmission component 41 slides to the right along the horizontal first slide rail 421, causing the second electrical connection part 311 to reset. When the distance between the upper mold assembly 10 and the lower mold assembly 20 reaches the target spacing, the second electrical connection part 311 connects with the first electrical connection part 321, and the heating component 31 starts heating, and this cycle continues.

[0070] The first electrical connection part 321 and the second electrical connection part 311 are provided with an insulating protective cover. The second electrical connection part 311 can be in the form of a slider and is set in a slide rail extending in the horizontal direction so that the second electrical connection part 311 can move stably in the slide rail to achieve a precise connection with the first electrical connection part 321.

[0071] In some embodiments, the first guide frame 42 is further provided with a second slide rail 422. The extension direction of the second slide rail 422 is the same as the movement direction of the upper mold assembly 10. The first end of the transmission member 41 passes through the second slide rail 422 and is rotatably connected to the upper mold assembly 10. It follows the lifting and lowering movement of the upper mold assembly 10 and reciprocates along the second slide rail 422.

[0072] Understandably, the second slide rail 422 can extend vertically, and the first end of the transmission member 41 passes through the second slide rail 422 and is rotatably connected to the upper mold assembly 10. The second slide rail 422 is used to constrain the horizontal position of the first end of the transmission member 41, so that the first segment can only move in the vertical direction. This prevents the first end from swinging laterally or horizontally during the reciprocating lifting and lowering of the upper mold assembly 10.

[0073] The first guide frame 42 can be made of steel plate with a certain structural strength. There can be two first guide frames 42, which are spaced apart and parallel to each other on opposite sides of the lower mold assembly, so that the heating element 31 can move stably between the two first guide frames 42.

[0074] In some embodiments, a first elastic member 50 is also included. The first elastic member 50 is disposed on the first electrical connection portion 321 and / or the second electrical connection portion 311. When the distance is greater than the target distance, the second electrical connection portion 311 continuously moves closer to the first electrical connection portion 321 to compress the first elastic member 50.

[0075] Understandably, when the distance between the upper mold assembly 10 and the lower mold assembly 20 is equal to the target spacing, the second electrical connection part 311 has already made contact with the first electrical connection part 321.

[0076] However, as the upper mold assembly 10 continues to move upward, the distance between the upper mold assembly 10 and the lower mold assembly 20 is greater than the target spacing; the second elastic member 22 needs to continuously move towards the first point connector; at this time, the first elastic member 50 provided in the first electrical connection 321 is compressed, or the first elastic member 50 provided in the second electrical connection 311 is compressed; or, the first elastic members 50 provided in the first electrical connection 321 and the second electrical connection 311 are compressed simultaneously to satisfy the movement stroke of the second electrical connection 311.

[0077] For example, when the upper mold assembly 10 moves vertically upward, the second end of the transmission member 41 drives the heating member 31 to move to the right along the first slide rail 421, so that the second electrical connection part 311 also moves to the right and continues to contact the first electrical connection part 321.

[0078] The first elastic element 50 is a conductive element, and its material and form can be a cylindrical helical compression spring made of metal.

[0079] The first elastic member 50 is provided in the first electrical connection portion 321 as an elastic extension member at the end of the first conductive portion 313 and the second conductive portion 314, and the first elastic member 50 is provided in the second electrical connection portion 311 as an elastic extension member of the power supply member 32 wire.

[0080] During the compression of the first elastic element 50, it can absorb the impact force at the moment of contact, prevent the electrical connection from bouncing or being damaged, and provide stroke margin and buffer force for the second electrical connection 311, and also ensure that the second end slides smoothly in the first slide rail 421.

[0081] In some embodiments, such as Figure 3 As shown, the transmission assembly 40 also includes a second guide frame 43; the second guide frame 43 and the first guide frame 42 are spaced apart in the lower mold assembly 20, and the second guide frame 43 has a third slide rail 431. The extension direction of the third slide rail 431, the extension direction of the first slide rail 421 and the extension direction of the second slide rail 422 are perpendicular to each other, and the other end of the heating element 31 passes through the second guide frame 43 through the third slide rail 431.

[0082] Understandably, the third slide rail 431 of the second guide frame 43 is on the same horizontal plane as the first slide rail 421 of the first guide frame 42, so that the two ends of the heating element 31 are respectively assumed on the first guide frame 42 and the second guide frame 43, providing stable support for the horizontal movement of the heating element 31.

[0083] Based on the blanking area of ​​the workpiece, the heating element 31 is set to an L-shape so that the two ends of the heating element 31 are perpendicular to each other in the same horizontal plane. One end of the heating element 31 moves horizontally along the length of the first slide rail 421, while the other end of the heating element 31 passes through the third slide rail 431 and shuttles within the third slide rail 431 along the length of the third slide rail 431 perpendicular to its length.

[0084] Furthermore, the length direction of the third slide rail 431 is perpendicular to the length direction of the first slide rail 421 in the same horizontal plane, thereby avoiding the inability of the heating element 31 to move through the third slide rail 431 due to its excessive width.

[0085] In some embodiments, the second guide frame 43 further includes a guide sleeve 432, which is disposed on the third slide rail 431, and the axial direction of the guide sleeve 432 is the same as the extension direction of the first slide rail 421.

[0086] Understandably, in order to allow the other end of the heating element 31 to move smoothly through the third slide rail 431, a guide sleeve 432 is provided inside the third slide rail 431. The other end of the heating element 31 passes through the guide sleeve 432, and the inner contour of the guide sleeve 432 is slightly larger than the outer contour of the other end of the heating element 31, so that the other end of the heating element 31 can pass through the guide sleeve 432 and avoid being scratched or damaged by friction on the inner edge of the third slide rail 431.

[0087] In some embodiments, such as Figure 3 As shown, the first guide frame 42 is provided with a first abutting member 60, which passes through at least one side wall of the first guide frame 42 and is threadedly connected to the side wall of the first guide frame 42. The second guide frame 43 is provided with a second abutment 70, which passes through at least one side wall of the first guide frame 42 and is threadedly connected to the side wall of the second guide frame 43.

[0088] Understandably, both the first abutting member 60 and the second abutting member 70 are abutting bolts. One end is provided with an adjustment part as an operating end, which is an internal hexagonal hole or an external hexagonal head, and the operator can use the corresponding tool to apply rotational torque; the other end is provided with an abutting top as a functional end, which is used to contact the lower mold assembly 20 and transmit the pushing force.

[0089] The first guide frame 42 includes two spaced and oppositely arranged side walls, and during installation, the lower mold assembly 20 is placed between the two side walls; When there is only one first abutting member 60, one side wall of the first guide frame 42 is in close contact with the outer side wall of the lower mold assembly 20, and the other side wall of the first guide frame 42 is separated from the lower mold assembly 20. The first abutting member 60 passes through the other side wall, so that the adjustment part is located on the side of the side wall away from the lower mold assembly 20, and the abutting top is located on the side of the side wall close to the lower mold assembly 20. The abutting top is made to abut against the lower mold assembly 20 by rotating the adjustment part.

[0090] The first abutting member 60 is threadedly connected to the side wall of the first guide frame 42. A first guide cylinder can be provided on the side wall of the first guide frame 42. The first guide cylinder has an internal thread, and the first abutting member 60 passes through the first guide cylinder to be connected with the external thread of the first abutting member 60.

[0091] When there are two first abutting members 60, the two side walls of the first guide member are respectively spaced apart from the side wall of the lower mold assembly 20. The first abutting members 60 are respectively located on the two side walls of the first guide member and are arranged opposite to each other. By turning the adjustment part, the abutting top is made to abut against the side wall of the lower mold assembly 20 to achieve a fixed connection between the first guide frame 42 and the lower mold assembly 20. The first abutting members 60 can be used to achieve a fixed connection with lower mold assemblies 20 of different sizes.

[0092] The fixing method of the second guide frame 43 to the lower mold assembly 20 is the same as the fixing method of the first abutment 60 to the first guide frame 42, and will not be described again here.

[0093] In some embodiments, the upper mold assembly 10 includes an upper mold component 11, a pressure plate 12, a limiting guide component 13, and an upper pressure plate 14; One end of the limiting guide 13 is connected to the upper mold 11, and the other end extends towards the lower mold assembly 20. The pressure plate 12 is located on the side of the upper mold 11 near the lower mold assembly 20. The limiting guide 13 passes through the pressure plate 12, and the pressure plate 12 can move closer to or away from the upper mold 11 along the limiting guide 13. The lower mold assembly 20 includes a lower mold part 21, a second elastic member 22, and a lower pressure plate 23. The second elastic member 22 is disposed on one side of the lower mold part 21. Along the movement direction of the upper mold assembly 10, the projections of the upper mold part 11 and the pressure plate 12 on the lower mold assembly 20 overlap and correspond to the position of the second elastic member 22. The projections of the upper mold part 11 and the pressure plate 12 on the lower mold assembly 20 are offset from those of the lower mold part 21. The elastic deformation direction of the elastic element is consistent with the lifting direction of the upper mold assembly 10, and the second elastic element 22 is used to abut against the side of the pressure plate 12 away from the upper mold assembly 11. The adjacent sides of the upper mold 11 and the lower mold 21 form a blanking section for cutting the blanking area of ​​the workpiece.

[0094] Understandably, the upper mold 11 is fixedly mounted on the upper pressure plate 13, and the lower mold 21 is fixedly mounted on the lower pressure plate 23, with the upper mold 11 and the lower mold 21 being positioned opposite each other. Both the upper die 11 and the lower die 21 are the main cutting components, and their side walls form the blanking section, which is directly driven by the press to provide the main punching force.

[0095] The pressure plate 12 is an independently floating clamping element that works in conjunction with the upper mold 11 to clamp sheet-like workpieces. It is connected to the upper mold 11 via a limiting guide 13. The fiber guide can be multiple precision guide pillars, which are fixed on the upper mold 11 and pass through guide holes on the pressure plate 12 to ensure that the pressure plate 12 rises and falls vertically without tilting. The step or nut at the end of the guide pillar away from the upper mold 11 can limit the maximum distance between the pressure plate 12 and the upper mold 11, preventing the pressure plate 12 from falling off.

[0096] Before shearing begins, a portion of the sheet is placed on the pressure plate 12. As the upper die 11 descends, the sheet is tightly clamped between the upper die 11 and the pressure plate 12 to prevent the sheet from sliding, warping, or wrinkling during the shearing process.

[0097] The side of the lower die 21 fits precisely with the side of the upper die 11 to form the blanking section, i.e., the shearing edge. The lower die 21 is fixed on the lower die base, providing a fulcrum for the reaction force of the shearing.

[0098] The second elastic element 22 is disposed on one side of the lower mold 21 and extends in the vertical direction. The second elastic element 22 can be a nitrogen spring.

[0099] There can be multiple second elastic elements 22, which are arranged along the side of the lower mold 21. The pressure plate 12 rests on the upper end of the second elastic element 22, and the upper surface of the pressure plate 12 and the upper surface of the lower mold 21 can be at the same level, with no height difference between them, which facilitates the feeding of the sheet material.

[0100] During the pressing process, the compressed second elastic element 22 generates a stable and adjustable reverse pressure, which together with the pressing plate 12 constitutes the clamping force on the plate. The elastic force is gentler than that of pure rigid pressing and can adapt to changes in plate thickness.

[0101] The upper die 11, the pressure plate 12, and the second elastic element 22 are aligned in the vertical direction to form a force transmission channel, ensuring that the pressure force acts directly and effectively on the shearing area.

[0102] The projections of the upper mold 11 and the pressure plate 12 are misaligned with the lower mold 21. The sides of the upper mold 11 and the lower mold 21 intersect to complete the shearing, while the pressure plate 12 and the second elastic member 22 are used to press the sheet material.

[0103] The work process is as follows: like Figures 4-9 As shown, in the initial state, the heating element 31 is turned on to heat the material feeding area of ​​the board.

[0104] The upper mold assembly 10 moves downward as a whole, the sheet metal is placed horizontally, with part of it placed on the lower mold part 21 and the other part placed on the pressure plate 12; The pressure plate 12 rests on the upper end of the second elastic member 22. As the upper mold member 11 continues to descend, under the guidance of the limiting guide member 13, the pressure plate 12 floats upward relative to the upper mold member 11 and works with the upper mold member 11 to apply a stable clamping force to the plate. The upper mold assembly 10 continues to descend. When the distance between the upper mold assembly 10 and the lower mold assembly 20 is less than the target distance, the heating element 31 stops heating.

[0105] The upper mold 11 continues to descend, and the side of the upper mold 11 and the side of the lower mold 21 begin to intersect. The blanking area of ​​the sheet metal has been heated and cut off by the blanking part of the upper mold 11 and the lower mold 21, thus completing the blanking of the sheet metal.

[0106] After the material is unloaded, the upper mold assembly 10 is reset.

[0107] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0108] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0109] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A blanking forming die, characterized in that, include: Upper mold component; The lower die assembly is spaced apart from the upper die assembly, and the upper die assembly reciprocates up and down relative to the lower die assembly to punch the workpiece; A heating assembly includes a heating element disposed between the upper mold assembly and the lower mold assembly, for heating the blanking area of ​​the workpiece; During the reciprocating lifting and lowering process of the upper mold assembly, the heating element is activated when the distance between the upper mold assembly and the lower mold assembly is greater than or equal to the target distance. If the distance is less than the target distance, the heating element is turned off.

2. The blanking forming die according to claim 1, characterized in that, The heating assembly also includes: A power supply component, the power supply component including a first electrical connection portion; The heating element includes a second electrical connection portion that is electrically connected to the first electrical connection portion; When the spacing is greater than or equal to the target spacing, the first electrical connection part is connected to the second electrical connection part, and the heating element is connected to the power supply element for heating. When the distance is less than the target distance, the first electrical connection part is separated from the second electrical connection part, and the heating element and the power supply element are switched off.

3. The blanking forming die according to claim 2, characterized in that, The heating element includes: Heating section, first conductive section, and second conductive section; The heating element is spaced apart from and corresponding to the lower mold assembly, and the heating element is used to heat the workpiece placed between the heating element and the lower mold assembly; Wherein, one end of the first conductive part is electrically connected to one end of the heating part, and the other end of the first conductive part is connected to the second electrical connection part; One end of the second conductive part is electrically connected to the other end of the heating part, and the other end of the second conductive part is connected to the second electrical connection part.

4. The blanking forming die according to claim 2, characterized in that, Also includes: A transmission assembly is connected between the upper mold assembly and the lower mold assembly; The transmission assembly includes a transmission component, one end of which is connected to the upper mold assembly, and the other end of which is connected to the second electrical connection part; When the upper mold assembly reciprocates relative to the lower mold assembly, the transmission component drives the second electrical connection part to move closer to or further away from the first electrical connection part.

5. The blanking forming die according to claim 4, characterized in that, The transmission assembly also includes: A first guide frame is disposed on the lower mold assembly, and the first guide frame has a first slide rail, the extension direction of the first slide rail intersecting the movement direction of the upper mold assembly; The first end of the transmission component is rotatably connected to the upper mold assembly, the second end of the transmission component is slidably disposed in the first slide rail, and one end of the heating component passes through the first slide rail and is connected to the second end; When the upper mold assembly reciprocates relative to the lower mold assembly, the second end of the transmission member drives the heating member to reciprocate within the first slide rail, so that the second electrical connection part moves closer to or further away from the first electrical connection part.

6. The blanking forming die according to claim 5, characterized in that, The first guide frame is also provided with a second slide rail. The extension direction of the second slide rail is the same as the movement direction of the upper mold assembly. The first end of the transmission member passes through the second slide rail and is rotatably connected to the upper mold assembly. It follows the lifting and lowering movement of the upper mold assembly and reciprocates along the second slide rail.

7. The blanking forming die according to claim 6, characterized in that, Also includes: A first elastic element is disposed in the first electrical connection portion and / or the second electrical connection portion. When the distance is greater than the target distance, the second electrical connection portion continuously moves closer to the first electrical connection portion to compress the first elastic element.

8. The blanking forming die according to claim 6 or 7, characterized in that, The transmission assembly also includes a second guide frame; The second guide frame is spaced apart from the first guide frame in the lower mold assembly. The second guide frame has a third slide. The extension directions of the third slide, the first slide, and the second slide are perpendicular to each other. The other end of the heating element passes through the second guide frame via the third slide.

9. The blanking forming die according to claim 8, characterized in that, The second guide frame further includes a guide sleeve, which is disposed on the third slide rail, and the axial direction of the guide sleeve is the same as the extension direction of the first slide rail.

10. The blanking forming die according to claim 8, characterized in that, The first guide frame is provided with a first abutting member, which passes through at least one side wall of the first guide frame and is threadedly connected to the side wall of the first guide frame. The second guide frame is provided with a second abutment, which passes through at least one side wall of the first guide frame and is threadedly connected to the side wall of the second guide frame.

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