Self-resistance hot stamping device with precise positioning function

Abstract

The invention relates to the technical field of precise-positioning self-resistance hot stamping devices, and discloses a precise-positioning self-resistance hot stamping device which comprises a lower die and an upper die matched with the lower die, and bolt fixing positions are arranged on the lower die and the upper die and used for being fixed to a hydraulic machine. Wherein the lower die is internally provided with a cooling pipeline and externally connected with a cooling water pipe communicated with the cooling pipeline, and quenching is carried out through cooling and heat absorption of the lower die in the hot pressing process. Compared with the prior art, the metal plate is supported by the supporting tongue plate without a cooling part before die assembly, so that the metal plate is in a nearly suspended state (compared with the prior art), and the lower die and the upper die are in contact with the metal plate at the same time to realize die assembly within the difference of not more than 0.5 seconds by setting the proper Y distance and X distance, so that the die assembly efficiency is greatly improved. Therefore, the overall quenching uniformity of the metal plate is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of precision positioning self-resistance heat stamping devices, and in particular to a precision positioning self-resistance heat stamping device. Background Art

[0002] In hot stamping, a metal sheet is heated by a heater and then placed on a mold with a cooling device. The rapid cooling of the mold is used to quench the metal sheet, thereby changing the metallographic structure inside the metal. Such heat treatment hot pressing can just change the shape and obtain high strength. However, when the existing hot stamping device is operating, first, the metal sheet is placed on the lower mold, and the cooling device is generally also arranged on the lower mold, and the surface of the mold is generally not flat. In this way, before the upper mold is pressed, the part of the high-temperature metal sheet in contact with the lower mold cools down first, which will cause the crystal subordination in the metal sheet to be uneven, reduce the precision of the sheet deformation, and have a greater adverse impact on the subsequent stress release and the mechanical properties of the product.

[0003] This case is proposed to solve or improve the disadvantages or deficiencies of the prior art. Summary of the Invention

[0004] The present invention is implemented by adopting the following technical solutions:

[0005] A precision positioning self-resistance heat stamping device includes a lower mold and a matching upper mold. Bolting fixing positions are provided on the lower mold and the upper mold for fixing on a hydraulic press. A cooling pipeline is arranged inside the lower mold, and a cooling water pipe communicated with the cooling pipeline is externally connected. During the hot pressing process, quenching is carried out through the heat absorption of the lower mold for temperature reduction.

[0006] A pre-supporter is arranged on the side of the lower mold. The pre-supporter includes a support sub-component for supporting the metal sheet and an electromagnet one for locking the support sub-component. It also includes another electromagnet two with a power-on state opposite to that of the electromagnet one for attracting the support sub-component. The metal sheet is erected on the support sub-component. When the upper mold presses for mold closing, the electromagnet one is powered off and the electromagnet two is powered on, so that the support sub-component quickly dodges, thereby enabling the upper mold and the lower mold to smoothly close the mold, and reducing the time for the hot metal sheet to contact the low-temperature lower mold in advance before the upper mold closes the mold.

[0007] In a preferred embodiment, sliding rails are symmetrically arranged on the side of the lower mold. The pre-supporter includes a slider, and the slider is horizontally slidably arranged in the sliding rails. Two screw holes are provided on the slider for being fixed at a specified position on the sliding rails under the action of set screws.

[0008] In a preferred embodiment, the pre-holder includes a vertical frame fixed to the slider and a self-blocking support configured on the vertical frame. A support tongue plate rotates within the self-blocking support to form a support horizontal plane for supporting the metal plate member, such that the metal plate member is positioned between the lower die and the upper die before mold closing and does not contact the lower die too early before the upper die starts to move. A support locking electromagnet and an electromagnet are fixed within the self-blocking support. A rubidium magnet is arranged at the tail end of the support tongue plate. The electromagnet and the support locking electromagnet are controlled by a controller. When the upper die is pressed down to a proper position, the support locking electromagnet is powered off, and the support tongue plate originally magnetically attracted by the support locking electromagnet loses the supporting force. Then the electromagnet is powered on to generate a strong magnetic force to attract the rubidium magnet, causing the lower end of the metal plate member to instantaneously lose the support surface and then be pressed by the upper die and the lower die.

[0009] In a preferred embodiment, an elastic reset device is further connected between the self-blocking support and the support tongue plate. The elastic reset device is used to reset the support tongue plate after stamping. By powering off the electromagnet through the controller, the elastic reset device pulls back the support tongue plate, and then the support locking electromagnet is powered on to lock the support tongue plate.

[0010] In a preferred embodiment, an adjusting screw rotates on the vertical frame, and an adjusting nut is fixed on the self-blocking support. The adjusting screw and the adjusting nut are in threaded connection. By rotating the adjusting screw, the height of the self-blocking support can be adjusted, and thus the support height for the plate can be adjusted according to metal plates of different thicknesses or processing requirements.

[0011] In a preferred embodiment, a laser ranging trigger is fixed on the lower die, and a laser receiver is correspondingly provided on the upper die in a matching manner. The laser ranging trigger transmits the measured distance to the laser receiver to a working computer, and the working computer controls when to start the controller. Moreover, the trigger threshold of the laser ranging trigger is adjusted by the working computer.

[0012] In a preferred embodiment, the support tongue plate is made of ceramic, and the low thermal conductivity of the ceramic is utilized to reduce the cooling speed of the contact point of the metal plate.

[0013] The advantages and positive effects of the present invention are:

[0014] 1. By using a supporting tongue plate without a cooling component to support the metal sheet before mold closing, making it reach a nearly suspended state (compared with the prior art), and by setting appropriate Y and X distances, the lower mold and the upper mold are made to simultaneously contact the metal sheet within no more than 0.5 seconds to achieve mold closing, thus greatly improving the overall quenching uniformity of the metal sheet.

[0015] 2. The height of the self-resistance support can be adjusted up and down, and the trigger threshold of the laser ranging trigger can be adjusted, so that it can be adjusted for metal sheets of different thicknesses. In addition, the distance between the two vertical frames on the same side can be adjusted to facilitate the processing of metal sheets of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic structural diagram of the present invention;

[0019] Figure 3 is Figure 1 an enlarged structural diagram of part A in

[0020] Figure 4 is Figure 1 an enlarged structural diagram of part B in

[0021] Figure 5 is a schematic structural diagram of the interior of 19 in the present invention;

[0022] Figure 6 is a schematic structural diagram of the interior of 19 in the present invention.

[0023] Reference numerals in the drawings: 10, pre-frame; 11, upper mold; 12, laser receiver; 13, laser ranging trigger; 14, lower mold; 15, cooling water pipe; 16, slider; 17, slide rail; 18, vertical frame; 19, self-resistance support; 20, adjusting screw; 21, adjusting nut; 22, supporting tongue plate; 23, rubidium magnet; 24, electromagnet; 25, controller; 26, elastic resetter; 27, electromagnet for support locking. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0025] The following further details the embodiments of the present invention with reference to the drawings:

[0026] If there are terms related to directional indication or positional relationship in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0027] As Figure 1 - shown, a precision positioning self-resistance heat stamping device of the present invention includes a lower die 14 and a matching upper die 11. Bolting fixing positions are provided on the lower die 14 and the upper die 11 for fixing on a hydraulic press. A cooling pipeline is provided inside the lower die 14, and a cooling water pipe 15 communicating with the cooling pipeline is externally provided. During the hot stamping process, quenching is carried out by the heat absorption and temperature reduction of the lower die 14.

[0028] A pre-holder 10 is provided on the side of the lower die 14. The pre-holder 10 includes a support sub-component for supporting a metal sheet and an electromagnet one for locking the support sub-component. It also includes another electromagnet two with a power-on state opposite to that of the electromagnet one for attracting the support sub-component. The metal sheet is placed on the support sub-component. When the upper die 11 presses down for die closing, the electromagnet one is powered off and the electromagnet two is powered on, so that the support sub-component quickly dodges, thereby enabling the upper die 11 and the lower die 14 to smoothly close the die, and reducing the time for the hot metal sheet to contact the low-temperature lower die 14 in advance before the upper die 11 closes the die.

[0029] In a preferred embodiment, slide rails 17 are symmetrically arranged on the side of the lower die 14. The pre-holder 10 includes a slider 16, and the slider 16 is horizontally slidably arranged in the slide rails 17. Two screw holes are provided on the slider 16 for fixing at a specified position in the slide rails 17 under the action of set screws.

[0030] In a preferred embodiment, the pre-holder 10 includes a vertical frame 18 fixed on the slider 16 and a self-resistance support 19 arranged on the vertical frame 18. A support tongue plate 22 is rotatably arranged inside the self-resistance support 19. The support tongue plate 22 is as Figure 5, a support horizontal plane is formed to support the metal plate so that the metal plate is located between the lower die 14 and the upper die 11 before mold closing and does not contact the lower die 14 too early before the upper die 11 starts to move. All support locking electromagnets 27 and electromagnets 24 are fixed inside the self-blocking support 19. The tail ends of the support tongue plates 22 are provided with all rubidium magnets 23. The electromagnets 24 and the support locking electromagnets 27 are controlled by a controller 25. When the upper die 11 is pressed down to a suitable position, the support locking electromagnet 27 is powered off, and the support tongue plate 22 originally magnetically attracted by the support locking electromagnet 27 loses the supporting force. And the electromagnet 24 is powered on to generate a strong magnetic force to attract the rubidium magnets 23, so that the lower end of the metal plate instantaneously loses the support surface and is then pressed by the upper die 11 and the lower die 14.

[0031] In a preferred embodiment, an elastic reset device 26 is further connected between the self-blocking support 19 and the support tongue plate 22. The elastic reset device 26 is used to reset the support tongue plate 22 after stamping. By powering off the electromagnet 24 through the controller 25, the elastic reset device 26 pulls back the support tongue plate 22, and then the support locking electromagnet 27 is powered on to lock the support tongue plate 22.

[0032] In a preferred embodiment, all adjusting screws 20 are also rotated on the vertical frame 18, and all adjusting nuts 21 are fixed on the self-blocking support 19. The adjusting screws 20 and the adjusting nuts 21 are in threaded connection. By rotating the adjusting screws 20, the height of the self-blocking support 19 is adjusted, and thus the support height for the plate can be adjusted according to metal plates of different thicknesses or processing requirements, that is, adjust Figure 2 the distance of X in

[0033] In a preferred embodiment, a laser ranging trigger 13 is also fixed on the lower die 14, and a laser receiver 12 is correspondingly provided on the upper die 11 in a matching manner. The laser ranging trigger 13 transmits the distance collected to the laser receiver 12 to the working computer, and the working computer controls when to start the controller 25. And the trigger threshold of the laser ranging trigger 13 is adjusted by the working computer. As Figure 2 marked as Y in

[0034] In a preferred embodiment, the support tongue plate 22 is made of ceramic, and the low thermal conductivity of the ceramic is used to reduce the cooling speed of the contact point of the metal plate.

[0035] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific embodiments. Any other embodiments obtained by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A self-resistance heat stamping device with precise positioning, comprising a lower die (14) and a matching upper die (11), characterized in that: The lower die (14) and the upper die (11) are provided with bolt fixing positions for fixing on a hydraulic press. A cooling pipeline is arranged in the lower die (14), and a cooling water pipe (15) communicated with the cooling pipeline is externally connected. During the hot pressing process, quenching is carried out by the heat absorption of the lower die (14) during temperature reduction. A pre-frame device (10) is arranged on the side of the lower die (14). The pre-frame device (10) includes a support sub-component for supporting a metal plate and an electromagnet I for locking the support sub-component. It also includes another electromagnet II with an energization state opposite to that of the electromagnet I for attracting the support sub-component. The metal plate is placed on the support sub-component. When the upper die (11) presses down for die closing, the electromagnet I is powered off and the electromagnet II is powered on, so that the support sub-component quickly dodges, enabling the upper die (11) and the lower die (14) to smoothly close the die, and reducing the time for the hot metal plate to come into contact with the low-temperature lower die (14) in advance before the upper die (11) closes the die.

2. The self-resistance heat stamping device with precise positioning according to claim 1, characterized in that: Sliding rails (17) are symmetrically arranged on the side of the lower die (14). The pre-frame device (10) includes a slider (16). The slider (16) is transversely slidably arranged in the sliding rails (17). Two screw holes are arranged on the slider (16) for being fixed at a specified position in the sliding rails (17) under the action of set screws.

3. The self-resistance heat stamping device with precise positioning according to claim 2, characterized in that: The pre-frame device (10) includes a vertical frame (18) fixed on the slider (16) and a self-blocking support device (19) arranged on the vertical frame (18). A supporting tongue plate (22) rotates in the self-blocking support device (19). The supporting tongue plate (22) forms a supporting horizontal plane to support the metal plate part, so that the metal plate part is located between the lower die (14) and the upper die (11) before die closing and does not come into contact with the lower die (14) too long in advance before the upper die (11) starts to move. A support locking electromagnet (27) and an electromagnet (24) are fixed in the self-blocking support device (19). A rubidium magnet (23) is arranged at the tail end of the supporting tongue plate (22). The electromagnet (24) and the support locking electromagnet (27) are controlled by a controller (25). When the upper die (11) presses down to a suitable position, the support locking electromagnet (27) is powered off, and the supporting tongue plate (22) originally magnetically attracted by the support locking electromagnet (27) loses the supporting force. And the electromagnet (24) is powered on to generate a strong magnetic force to attract the rubidium magnet (23), so that the lower end of the metal plate part instantly loses the supporting plane, and then is pressed by the upper die (11) and the lower die (14).

4. The self-resistance heat stamping device with precise positioning according to claim 3, characterized in that: An elastic reset device (26) is also connected between the self-blocking support (19) and the support tongue plate (22). The elastic reset device (26) is used to reset the support tongue plate (22) after stamping. By powering off the electromagnet (24) through the controller (25), the elastic reset device (26) pulls back the support tongue plate (22), and then the support locking electromagnet (27) is powered on to lock the support tongue plate (22).

5. The self-resistance heat stamping device with precise positioning according to claim 4, wherein: All the adjusting screws (20) are also rotatably arranged on the vertical frame (18), and all the adjusting nuts (21) are fixed on the self-blocking support (19). The adjusting screws (20) are threadedly connected with the adjusting nuts (21). By rotating the adjusting screws (20), the height of the self-blocking support (19) is adjusted, and thus the support height for the metal sheet can be adjusted according to metal sheets of different thicknesses or processing requirements.

6. The self-resistance heat stamping device with precise positioning according to claim 5, wherein: A laser ranging trigger (13) is also fixedly arranged on the lower die (14), and a laser receiver (12) is correspondingly arranged on the upper die (11) in a matching manner. The laser ranging trigger (13) transmits the collected distance to the laser receiver (12) to a working computer, and the working computer controls when to start the controller (25), and the trigger threshold of the laser ranging trigger (13) is adjusted by the working computer.

7. The self-resistance heat stamping device with precise positioning according to claim 6, characterized in that: The support tongue plate (22) is made of ceramic, and the low thermal conductivity of the ceramic is used to reduce the cooling speed of the contact point of the metal sheet.

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