A flat blank drawing die

Abstract

The utility model relates to a kind of flat plate drawing die, including upper die holder and lower die holder;The upper die holder bottom is provided with upper die kernel;The bottom below of the lower die holder is provided with lower backing plate;The lower backing plate top is provided with spring seat, and nitrogen gas spring is provided in spring seat, and the lower die holder is provided with spring hole corresponding with the number and position of nitrogen gas spring upper and lower;The lower die holder top is provided with lower die kernel and pressure ring, and lower die kernel penetrates pressure ring and is in sliding fit with pressure ring upper and lower;The top of nitrogen gas spring and the bottom of pressure ring are in contact, and the top of lower die kernel will not protrude above the top of pressure ring after nitrogen gas spring lifts pressure ring, and lower die kernel and pressure ring upper die kernel form product forming cavity between when pressure ring is lowered to bottom and the top of lower die holder is adhered.Product quality is guaranteed, and the processing efficiency of product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to automobile sheet metal part hollow part processing, especially, relate to a flat plate drawing die. BACKGROUND

[0002] In the automobile manufacturing process, the outer part of the frame is equipped with automobile sheet metal parts with specific structures, and these sheet metal parts cooperate with the frame to form the body of the automobile. The body structure of the automobile is complex, and the sheet metal parts on the body are mostly processed by die stamping, and the sheet metal parts of specific materials are cut and placed on the corresponding stamping die for stamping.

[0003] Many components in the existing automobile sheet metal parts involve hollow structure design. In the stamping process of these hollow structure sheet metal parts, the to-be-stamped plate is mostly placed on the concave cavity first, and its position is manually placed. Because the existing drawing die is mostly with the cavity on the lower die and the punch on the upper die, in order to ensure that the upper die and the lower die are not interfered when the die is closed, the lower die top is not convenient to set the positioning block for limiting the to-be-stamped plate, so that the to-be-stamped plate is prone to inaccurate position when placed. In order to improve the stamping efficiency and improve the accuracy of the installation position of the to-be-stamped plate on the lower die, the existing method is to first process the to-be-stamped plate into a semi-finished part with a lower protrusion, and then the protrusion profile is matched with the cavity profile on the lower die, and then the drawing stamping die is used for stamping and drawing. This processing method is complicated, the processing efficiency is not high, and the quality of the product cannot be effectively improved. SUMMARY

[0004] The utility model solves the technical problem that a flat plate drawing die capable of guaranteeing one-time forming of automobile sheet metal part hollow parts is provided.

[0005] In order to solve the above technical problem, the utility model is realized by the following technical scheme:

[0006] A flat plate drawing die includes an upper die base and a lower die base corresponding to each other. An upper die core is fixedly connected to the bottom of the upper die base. A drawing cavity is formed at the bottom of the upper die core. A pin hole penetrating the top of the upper die core is formed at the highest point of the drawing cavity. An elastic ejector pin is placed inside the pin hole, and the upper end of the elastic ejector pin is fixed to the bottom of the upper die base. A lower support plate is provided below the bottom of the lower die base. The lower die base and the lower support plate are fixedly connected together by two shims, symmetrically arranged on the bottom of the lower die base near the left and right sides. A spring seat is provided at the top of the lower support plate between the two shims. A nitrogen spring is placed inside the spring seat. The lower die base is provided with spring holes corresponding to the number and position of the nitrogen springs, which penetrate the upper and lower surfaces. The top of the lower die base is provided with a lower die core and a pressure ring for facilitating edge rolling of the product. The lower die core penetrates the pressure ring and slides vertically with it. The top of the lower die core and the top of the pressure ring correspond vertically with the bottom drawing cavity of the upper die core. The top of the nitrogen spring abuts against the bottom of the pressure ring. After the nitrogen spring lifts the pressure ring, the top of the lower die core will not protrude above the top of the pressure ring. When the pressure ring descends to the bottom and fits against the top of the lower die base, the top cavity of the lower die core and the bottom drawing cavity of the upper die core together form the product forming cavity.

[0007] Furthermore, a guide plate mounting plate is provided at the bottom of the upper mold base near the outer end. A guide plate is fixedly connected to the center of the end of the guide plate mounting plate and is embedded therewith. The bottom of the guide plate extends downward below the bottom of the guide plate mounting plate. A guide block is provided at the top of the lower mold base near the outer end, corresponding to the upper and lower parts of the guide plate mounting plate. A guide groove with vertical connection is provided at the center of the outer end of the guide block. The lower end of the guide plate can be inserted into the guide groove and slide vertically with the guide groove. A transition groove with vertical penetration is provided on the lower mold base corresponding to the guide groove.

[0008] Furthermore, the lower die base is provided with guide positioning plates on the left and right sides of the pressure ring to limit its horizontal position. The pressure ring and the guide positioning plates slide up and down, and the height of the guide positioning plates is higher than the height of the pressure ring, which can limit the horizontal position of the plate to be stamped placed on top of the pressure ring.

[0009] Furthermore, the pressure ring has a movable hole that is vertically connected near the corner, and a height-equalizing bolt that is clearance-fitted into the movable hole is provided in the movable hole. The lower end of the height-equalizing bolt is fixedly connected to the lower mold base.

[0010] Furthermore, an upper limit post is provided at the bottom of the upper mold base located outside the upper mold core, and a lower limit post is provided at the top of the lower mold base, corresponding vertically to the upper limit post.

[0011] Further, the upper die base bottom center is provided with an inner recessed centering groove, and the upper die core is embedded in the centering groove.

[0012] Compared with the prior art, the flat plate drawing die has the advantages that the flat plate to be punched can be horizontally placed on the top of the blank holder, the edge of the flat plate to be punched can be horizontally limited by the guide positioning plate, the accuracy and convenience of the placement position of the flat plate to be punched are ensured, the upper die core is pressed against the blank holder and moves downward during punching, the position of the lower die core remains unchanged, the fast and effective processing procedure of the flat plate to be punched during punching is ensured, the product quality is ensured, and the processing efficiency of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 is a three-dimensional structure schematic view of the flat plate drawing die of the present application;

[0015] Figure 2 is a top view structure schematic view of the flat plate drawing die of the present application;

[0016] Figure 3 is Figure 2 structure sectional view of A-A in the figure;

[0017] Figure 4 is Figure 2 structure sectional view of B-B in the figure;

[0018] Figure 5 is a partial sectional view of the flat plate drawing die of the present application.

[0019] In the figure: 1, upper die base; 11, upper limiting column; 2, lower supporting plate; 21, heightening block; 22, spring seat; 3, guide plate mounting plate; 4, guide block; 41, guide groove; 5, guide plate; 6, lower die base; 61, lower limiting column; 62, nitrogen gas spring; 63, spring hole; 7, blank holder; 71, lower die core; 72, guide positioning plate; 8, upper die core; 81, elastic top pin; 9, equal-height bolt. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it should be explained that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0022] In addition, if the terms "horizontal", "vertical" and the like appear, it does not mean that the component must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure or component must be completely horizontal, but can be slightly inclined.

[0023] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0024] In the description of the embodiments of the present application, it should also be explained that, unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment

[0026] Please refer to the drawings attached Figures 1 to 5 in the description, the drawings attached Figures 1 to 5 The utility model discloses a flat plate drawing die for the drawing processing of hollow parts in automobile sheet metal parts, which can improve the processing efficiency and quality of products in one procedure. The flat plate drawing die comprises an upper die seat 1 and a lower die seat 6 corresponding to each other. The upper die seat 1 is fixedly installed at the bottom of the upper pad plate of a hydraulic machine through bolts. An upper die core 8 is fixedly connected to the bottom of the upper die seat 1. The upper die core 8 and the upper die seat 1 are fixedly connected together through bolts, which is convenient for disassembly and assembly. In order to ensure the accuracy of the installation position of the upper die core 8 on the upper die seat 1, as shown in the drawings attached Figures 3 to 5 to the description, a concave centering groove is arranged at the bottom center of the upper die seat 1. The upper die core 8 is embedded in the centering groove. The horizontal position of the upper die core 8 can be limited through the centering groove, and the accuracy of the position of the upper die core 8 when assembled with the upper die seat 1 is ensured, which improves the processing accuracy of the die. A drawing cavity is arranged at the bottom of the upper die core 8. In order to prevent the stamping part from being attached to the drawing cavity and separating from the upper die when the die is opened, affecting the stripping, a pin hole penetrating through the top of the upper die core 8 upward is arranged at the center of the highest point of the drawing cavity. An elastic ejector pin 81 is arranged in the pin hole. The upper end of the elastic ejector pin 81 is fixed at the bottom of the upper die seat 1, and it can move synchronously with the upper die seat 1. When not stamping, the top of the lower end of the elastic ejector pin 81 is located in the drawing cavity. When the die is opened, the stamping part can be ejected from the drawing cavity through the elastic ejector pin 81, and it will not be attached to the drawing cavity and move synchronously with the upper die core 8. Please refer to the drawings attached Figure 1And 3 to 5, the bottom of the lower die seat 6 is provided with the lower bolster plate 2, the lower bolster plate 2 is fixedly installed on the lower pad plate of the hydraulic machine by bolt, the lower die seat 6 and the lower bolster plate 2 are fixedly connected together through the cushion block 21, the cushion block 21 is fixedly connected between the lower die seat 6 and the lower bolster plate 2 through bolt, convenient to disassemble and assemble, more different height cushion blocks can be replaced according to requirements, in order to ensure the stability of the lower die seat 6, the cushion block 21 has two blocks, which are symmetrically arranged at the parts near the left and right sides of the bottom of the lower die seat 6;The part between the left and right two cushion blocks 21 on the top of the lower bolster plate 2 is provided with a spring seat 22, the spring seat 22 has multiple groups, which are arranged side by side, the spring seat 22 is provided with nitrogen gas springs 62, the lower die seat 6 is provided with spring holes 63 corresponding in number and position to the nitrogen gas springs 62, the spring holes 63 penetrate the upper and lower surfaces of the lower die seat 6;The top of the lower die seat 6 is provided with a lower die core 71 fixedly connected thereto and a blank holder ring 7 for facilitating the calender forming of the product edge, it should be noted that the bottom of the lower die core 71 is fixedly connected with the top of the lower die seat 6 through bolt, the blank holder ring 7 is not connected and fixed with the lower die seat 6, the blank holder ring 7 is provided with a linking hole matched with the lower die core 71, the lower die core 71 penetrates the linking hole on the blank holder ring 7 and is in sliding fit with the blank holder ring 7, and the top of the lower die core 71 and the top of the blank holder ring 7 correspond to the bottom of the draw cavity of the upper die core 8, and the upper and lower molds can be docked when the mold is closed;In order to facilitate the stripping of the stamping part, and facilitate the placement of the to-be-stamped plate on the top of the blank holder ring 7, the top of the nitrogen gas spring 62 abuts against the bottom of the blank holder ring 7, and the top of the lower die core 71 will not protrude above the top of the blank holder ring 7 after the nitrogen gas spring 62 lifts the blank holder ring 7, in order to avoid that the nitrogen gas spring 62 lifts the blank holder ring 7 too high, the nitrogen gas spring 62 is provided with a limiting cap on the top, the limiting cap can be embedded in the larger diameter hole at the top of the stepped hole, and the height of the equal-height bolt 9 corresponds to the height of the lower die core 71;When the blank holder ring 7 is lowered to the bottom and abuts against the top of the lower die seat 6, the upper end of the lower die core 71 cooperates with the top cavity of the blank holder ring 7 and the draw cavity at the bottom of the upper die core 8 to form a product forming cavity;In order to ensure that the position of the blank holder ring 7 on the lower die seat 6 is not easy to deviate and the stability when the blank holder ring 7 is raised and lowered, and to ensure the matching precision between the blank holder ring 7 and the upper die core 8, refer to the drawings Figure 1 And 5 The part near the corner of the blank holder ring 7 is provided with a movable hole communicating upward and downward, the movable hole is provided with an equal-height bolt 9 matched with the gap, and the lower end of the equal-height bolt 9 is fixedly connected with the lower die seat 6;The top of the equal-height bolt 9 is provided with a limiting cap, the movable hole is a stepped hole, the limiting cap can be embedded in the larger diameter hole at the top of the stepped hole, and the height of the equal-height bolt 9 corresponds to the height of the lower die core 71;When the blank holder ring 7 is lowered to the bottom and abuts against the top of the lower die seat 6, the upper end of the lower die core 71 cooperates with the top cavity of the blank holder ring 7 and the draw cavity at the bottom of the upper die core 8 to form a product forming cavity;In order to ensure that the position of the blank holder ring 7 on the lower die seat 6 is not easy to deviate and the stability when the blank holder ring 7 is raised and lowered, and to ensure the matching precision between the blank holder ring 7 and the upper die core 8, refer to the drawings Figure 3 And 5As shown, the lower die seat 6 is provided with a guide positioning plate 72 on both sides of the blank holder 7, the blank holder 7 and the guide positioning plate 72 are in sliding fit, and the height of the guide positioning plate 72 is higher than that of the blank holder 7, so that the horizontal position of the blank holder 7 can be limited.

[0027] In order to ensure the safety of the upper die and the lower die when they are closed, and prevent the upper die from colliding with the lower die when the upper die moves excessively, referring to the drawings Figure 1 and 5 As shown, the upper die seat 1 is provided with an upper limiting column 11 on the bottom of the upper die core 8, and the lower die seat 6 is provided with a lower limiting column 61 corresponding to the upper limiting column 11, when the upper die and the lower die are closed, the lower end of the upper limiting column 11 and the upper end of the lower limiting column 61 will interfere with each other, which limits the position of the closed die, in order to further improve the safety of the closed die, the upper limiting column 11 and the lower limiting column 61 correspond to each other and have at least two groups. Figure 1 and 3 As shown, the guide plate mounting plate 3 is provided on the bottom of the upper die seat 1, and the guide plate 5 is fixedly connected to the center of the end of the guide plate mounting plate 3, in order to facilitate the installation of the guide plate 5 on the guide plate mounting plate 3, the outer end of the guide plate mounting plate 3 is provided with a groove, the guide plate 5 is fixedly installed in the groove by bolts, and the bottom of the guide plate 5 extends below the bottom of the guide plate mounting plate 3, in order to cooperate with the guide plate 5, the guide block 4 corresponding to the guide plate mounting plate 3 is provided on the top of the lower die seat 6, the outer end of the guide block 4 is provided with a guide groove 41 in communication with the upper and lower ends, the lower end of the guide plate 5 can be inserted into the guide groove 41 and slide with the guide groove 41, the guide plate 5 and the guide groove 41 can ensure the position accuracy of the upper die and the lower die when they are closed, in order to avoid interference between the lower end of the guide plate 5 and the lower die seat 6, the transition groove is provided on the lower die seat 6 corresponding to the guide groove 41, and the lower end of the guide plate 5 is inserted into the transition groove, it should be noted that the height of the bottom of the guide plate mounting plate 3 is consistent with the height of the bottom of the upper limiting column 11, and the height of the top of the guide block 4 is consistent with the height of the top of the lower limiting column 61, and the guide plate mounting plate 3 and the guide block 4 can also play the role of the upper limiting column 11 and the lower limiting column 61.

[0028] The work is, first, the to be punched plate is placed on the top of the blank holder 7, at this time, the blank holder 7 is lifted by the nitrogen spring 62, the lower die core 71 will not protrude above the top of the blank holder 7, the to be punched plate is conveniently placed horizontally on the top of the blank holder 7, and the outer periphery of the to be punched plate placed on the blank holder 7 is limited by the guide positioning plate 72, so that the position accuracy of the to be punched plate placed on the top of the blank holder 7 is ensured;Then start the hydraulic machine, the upper pad of the hydraulic machine drives the upper die seat 1 downward, the upper die seat 1 drives the upper die core 8 and the upper limiting column 11 and the guide plate 5 to move downward synchronously, when the mold is closed, the lower end of the guide plate 5 is inserted into the guide groove 41, the position of the upper die and the lower die can be limited, the bottom of the upper die core 8 contacts the top of the to be punched plate on the top of the blank holder 7, and then drives the part of the to be punched plate located outside the lower die core 71 to follow the blank holder 7 to descend, while the part located on the upper end of the lower die core 71 is limited by the drawing cavity and cannot move, until the bottom of the blank holder 7 is attached to the top surface of the lower die seat 6, at this time, the lower end of the upper limiting column 11 and the upper end of the lower limiting column 61 are in contact with each other, and the bottom of the guide plate mounting plate 3 is in contact with the upper end of the guide block 4;After the stamping is completed, the upper pad of the hydraulic machine drives the upper die seat 1, the upper die core 8, the upper limiting column 11 and the guide plate 5 to reset upward, the tension of the elastic ejector pin 81 will push the stamped part downward during the resetting process, so that the stamped part is prevented from being attached to the drawing cavity and rising with the upper die core 8, at the same time, the nitrogen spring 62 at the bottom of the blank holder 7 drives the blank holder 7 to reset upward along the guide positioning plate 72 and the lower die core 71, the stamped part is ejected from the outside of the lower die core 71 during the resetting process, the ejection of the stamped part is realized, and the stamped part is conveniently removed.

[0029] The flat plate drawing die has simple structure, the to be punched plate can be placed horizontally on the top of the blank holder 7, the edge of the to be punched plate can be horizontally limited by the guide positioning plate 72, the accuracy and convenience of the placement position of the to be punched plate can be ensured, the upper die core 8 pushes the blank holder 7 to move downward during stamping, the position of the lower die core 71 remains unchanged, the rapid and effective processing procedure of the to be punched plate during stamping is ensured, the product quality is ensured, and the processing efficiency of the product is improved.

[0030] It should be emphasized that: the above is only a preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flat blank drawing die characterized by: The application relates to a die set for a drawing and ironing forming process, which comprises an upper die seat (1) and a lower die seat (6) corresponding to each other; the bottom of the upper die seat (1) is provided with an upper die core (8) fixedly connected thereto, the bottom of the upper die core (8) is provided with a drawing cavity, the highest position of the drawing cavity is provided with a pin hole penetrating through the top of the upper die core (8) upwards, an elastic ejector pin (81) is arranged in the pin hole, and the upper end of the elastic ejector pin (81) is fixed to the bottom of the upper die seat (1); the bottom of the lower die seat (6) is provided with a lower supporting plate (2), the lower die seat (6) and the lower supporting plate (2) are fixedly connected together through a high block (21), the high block (21) has two blocks and is symmetrically arranged at the positions close to the left and right sides of the bottom of the lower die seat (6); the lower supporting plate (2) is provided with a spring seat (22) at the position between the two high blocks (21) on the top; a nitrogen gas spring (62) is arranged in the spring seat (22); the lower die seat (6) is provided with spring holes (63) corresponding to the number and position of the nitrogen gas springs (62) in the upper and lower directions, and the spring holes (63) penetrate through the upper and lower surfaces of the lower die seat (6); the top of the lower die seat (6) is provided with a lower die core (71) fixedly connected thereto and a blank holder (7) facilitating the edge calendering forming of a product, the lower die core (71) penetrates through the blank holder (7) and is in sliding fit with the blank holder (7) in the upper and lower directions, the top of the lower die core (71) and the top of the blank holder (7) correspond to the drawing cavity of the bottom of the upper die core (8) in the upper and lower directions; the top of the nitrogen gas spring (62) abuts against the bottom of the blank holder (7), the top of the lower die core (71) does not protrude above the top of the blank holder (7) after the blank holder (7) is lifted up by the nitrogen gas spring (62), and when the blank holder (7) descends to the bottom and is attached to the top of the lower die seat (6), the top of the lower die core (71) and the top cavity of the blank holder (7) form a product forming cavity together with the drawing cavity of the bottom of the upper die core (8).

2. A flat blank drawing die according to claim 1, characterized in that: The position close to the outer end of the bottom of the upper die seat (1) is provided with a guide plate mounting plate (3), the center of the end of the guide plate mounting plate (3) is fixedly connected with a guide plate (5) in embedded fit, the bottom of the guide plate (5) extends downwards below the bottom of the guide plate mounting plate (3); the position close to the outer end of the top of the lower die seat (6) is provided with a guide block (4) corresponding to the guide plate mounting plate (3) in the upper and lower directions, the outer end center of the guide block (4) is provided with a guide groove (41) in communication in the upper and lower directions, the lower end of the guide plate (5) can be inserted and fitted in the guide groove (41) and is in sliding fit with the guide groove (41) in the upper and lower directions; the position corresponding to the guide groove (41) on the lower die seat (6) is provided with a transition groove penetrating in the upper and lower directions.

3. A flat blank drawing die according to claim 1, characterized in that: The positions on the left and right sides of the blank holder (7) on the lower die seat (6) are provided with guide positioning plates (72) limiting the horizontal positions, the blank holder (7) is in sliding fit with the guide positioning plates (72) in the upper and lower directions, and the height of the guide positioning plates (72) is higher than that of the blank holder (7), so that the horizontal position of a plate to be stamped placed on the top of the blank holder (7) can be limited.

4. A flat blank drawing die according to claim 1, characterized in that: The edge ring (7) is provided with a movable hole communicating with the upper and lower parts near the corner, and the movable hole is provided with an equal height bolt (9) matched with the gap, and the lower end of the equal height bolt (9) is fixedly connected with the lower die seat (6).

5. A flat sheet drawing die according to claim 1, characterized in that: The upper die seat (1) is provided with an upper limiting column (11) at the bottom outside the upper die core (8), and the lower die seat (6) is provided with a lower limiting column (61) corresponding to the upper limiting column (11) in the upper and lower parts.

6. A flat sheet drawing die according to claim 1, characterized in that: The upper die seat (1) is provided with a concave centering groove at the bottom center, and the upper die core (8) is embedded in the centering groove.

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