Stamping die for front end plate connecting piece

Abstract

The utility model discloses a stamping die for a front end plate connecting piece, and relates to the technical field of stamping dies. The die comprises an upper die and a lower die, the upper die comprises an upper die base, a trimming punch, a drawing female die, a fine cutting punch, a punching male die and a cutting punch are arranged at the bottom of the upper die base, the drawing female die comprises a first-time drawing female die and a second-time drawing female die which are arranged at intervals, and a first upper die pressing plate is arranged on the peripheral edge of the first-time drawing female die; the lower die comprises a lower die base, the top of the lower die base is correspondingly provided with a trimming knife edge, a drawing male die, a fine cutting knife edge, a punching female die insert core and a cut-off knife edge, the drawing male die comprises a first-time drawing male die and a second-time drawing male die which are arranged at intervals, a first lower die pressing plate is arranged around the periphery of the first-time drawing male die, and elastic components are arranged below the first lower die pressing plate at intervals. According to the utility model, the edge of a plate can be prevented from wrinkling in the drawing process, the plate can uniformly flow into the female die, and the problems of non-uniform wall thickness, bottom cracking and the like of a drawn workpiece are avoided.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a stamping die for a front end plate connector. Background Technology

[0002] The engine compartment side beams are located on both sides of the engine compartment and are long strip-shaped structural components that extend from the front of the vehicle to the driver's cabin. The engine compartment side beam front end plate connector is an important part used to connect the engine compartment side beam front end plate with the front collision crossbeam, front module assembly, front upper component bracket and other surrounding components, so that the front structure of the vehicle forms a whole. It provides accurate positioning for these components, ensures their installation position accuracy on the vehicle, and thus achieves good assembly quality and vehicle appearance.

[0003] like Figure 1 The front-end plate connector shown has a cylindrical structure with a certain depth in its middle section. This front-end plate connector requires multiple stamping forming processes, such as trimming, deep drawing, precision cutting, punching, and cutting. Trimming removes excess material from the periphery of the workpiece. Deep drawing forms the flat workpiece into an open hollow shape, or further modifies the shape and size of the open hollow part. Precision cutting is a high-precision punching process on the workpiece. Punching involves punching holes of various shapes into the workpiece. Cutting separates the workpiece from the strip material by punching along the unclosed contour, resulting in individual workpieces. In the deep drawing process, because the material of this type of front-end plate connector is relatively thin and the deep drawing is deep, wrinkling is prone to occur at the edges of the sheet metal during the deep drawing process. Furthermore, if the speed and amount of sheet metal flowing into the die are not controlled, the sheet metal may not flow into the die evenly. If the sheet metal flows too fast or too slow, problems such as uneven wall thickness and bottom cracking may occur in the deep-drawn workpiece, affecting the quality of the workpiece. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a stamping die for a front plate connector, which can prevent the sheet metal from wrinkling at the edge during the deep drawing process, and can make the sheet metal flow evenly into the die cavity, thus avoiding problems such as uneven wall thickness and bottom cracking in the deep-drawn workpiece.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A stamping die for a front-end plate connector includes an upper die and a lower die. The upper die includes an upper die base, and the bottom of the upper die base is provided with a trimming punch, a drawing die, a precision cutting punch, a punching punch, and a cutting punch. The drawing die includes a primary drawing die and a secondary drawing die arranged at intervals. A first upper die pressure plate is fixedly connected to the four edges of the primary drawing die. The lower die includes a lower die base, and the top of the lower die base is provided with a trimming cutter, a drawing punch, a precision cutting cutter, a punching die insert, and a cutting cutter. The drawing punch includes a primary drawing punch and a secondary drawing punch arranged at intervals. A first lower die pressure plate that can move up and down is provided around the primary drawing punch. Multiple elastic components are arranged at intervals below the first lower die pressure plate.

[0007] In some embodiments, a second upper die pressure plate is fixedly connected to the periphery of the secondary drawing die, and a second lower die pressure plate is fixedly connected around the periphery of the secondary drawing punch. A clearance groove is provided horizontally on the second lower die pressure plate. A pressing base that can move up and down is fixedly connected to the bottom of the first lower die pressure plate. A first lifting rod and a second lifting rod are fixedly connected horizontally on the side of the pressing base near the secondary drawing punch. The first lifting rod extends between the pressing base and the second lower die pressure plate, and the second lifting rod extends to the clearance groove.

[0008] In at least one embodiment, the elastic component is a nitrogen spring, which is vertically mounted on the lower die base, and its piston rod end is fixedly connected to the pressure base.

[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0010] When the first drawing die and the first drawing punch work together, the first upper die pressure plate first contacts the strip, and the strip is pressed tightly against the first lower die pressure plate by applying pressure, so that it keeps the strip in a fixed position during the drawing process and prevents the material from shifting in the die. Then, the first drawing punch and the first drawing die work together to draw the flat strip into an open hollow shape, which effectively prevents wrinkling and ensures the dimensional and shape accuracy of the stamped part. The pressure of the first upper die pressure plate can be adjusted by the pressure mechanism of the die to control the speed and amount of material flow. The appropriate pressure can make the material flow evenly into the cavity of the first drawing die, avoiding defects such as uneven wall thickness and tearing. Finally, the die opens, and the first lower die pressure plate can lift the stamped part and separate it from the first drawing punch due to the elasticity of the elastic component. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a front-end board connector in the prior art;

[0012] Figure 2 This is a schematic diagram of the structure of an embodiment of this application;

[0013] Figure 3 This is a schematic diagram of the upper mold structure according to an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of the lower mold structure according to an embodiment of this application;

[0015] Figure 5 for Figure 4 A magnified view of a portion of region A;

[0016] Figure 6 for Figure 4 A magnified view of a portion of region B;

[0017] Figure 7 This is a schematic diagram of the connection structure between the first drawing punch and the second drawing punch in an embodiment of this application.

[0018] The numbers in the diagram are as follows: 1. Upper die holder; 2. Lower die holder; 3. Trimming punch; 4. Drawing die; 41. First drawing die; 42. Second drawing die; 5. Finishing punch; 6. Punching punch; 7. Cutting punch; 8. Trimming blade; 9. Drawing punch; 91. First drawing punch; 92. Second drawing punch; 10. Finishing blade; 20. Punching die insert; 30. Cutting blade; 40. First upper die pressure plate; 50. First lower die pressure plate; 60. Elastic component; 70. Second upper die pressure plate. Plate; 80, Second lower die pressure plate; 801, Clearance groove; 90, Pressure base; 901, First lifting rod; 902, Second lifting rod; 100, Interval positioning punch; 200, Interval positioning cutter; 300, Guide ruler; 3001, Positioning block; 400, Folding die; 500, Folding punch; 600, Side block; 6001, Wear-resistant plate; 700, First outer limit post; 800, Second outer limit post; 900, Inner limit block; 1000, Front end plate connector; 2000, Strip material. Detailed Implementation

[0019] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-7As shown in the embodiment of this application, a stamping die for a front-end plate connector is provided for stamping a front-end plate connector 1000. It includes an upper die and a lower die. The upper die includes an upper die base 1. The bottom of the upper die base 1 is provided with a trimming punch 3, a drawing die 4, a precision cutting punch 5, a punching punch 6, and a cutting punch 7. The drawing die 4 includes a first drawing die 41 and a second drawing die 42 arranged at intervals. The first drawing die 41 is fixedly connected to a first upper die pressure plate 40 around its four edges. The lower die includes a lower die base 2. The top of the lower die base 2 is provided with a trimming blade 8, a drawing punch 9, a precision cutting blade 10, a punching die insert 20, and a cutting blade 30. The drawing punch 9 includes a first drawing punch 91 and a second drawing punch 92 arranged at intervals. The first drawing punch 91 is surrounded by a first lower die pressure plate 50 that can move up and down. A plurality of elastic components 60 are arranged at intervals below the first lower die pressure plate 50. An empty station is set between the first drawing die 41 and the second drawing die 42, and between the first drawing punch 91 and the second drawing punch 92, to provide buffer and transition space for the stamped parts. This allows the stamped parts to pause briefly at this position, which facilitates material flow and stress release after the first drawing. This reduces defects such as cracking and wrinkling caused by stress concentration and poor material flow, and improves the quality of the stamped parts.

[0022] When the first drawing die 41 and the first drawing punch 91 work together, the first upper die pressure plate 40 first contacts the strip 2000, and applies pressure to press the strip 2000 tightly onto the first lower die pressure plate 50, so that it remains in a fixed position during the drawing process and prevents the material from shifting in the die. Then, the first drawing punch 91 draws the flat strip 2000 into an open hollow shape, effectively preventing wrinkling and ensuring the dimensional and shape accuracy of the stamped part. The first upper die pressure plate 40 can control the speed and amount of material flow by adjusting the pressure. Appropriate pressure can make the material flow evenly into the cavity of the first drawing die 41, avoiding defects such as uneven wall thickness and tearing. Finally, the die opens, and the first lower die pressure plate 50 lifts the stamped part due to the elastic action of the elastic component 60, separating it from the first drawing punch 91.

[0023] The secondary drawing die 42 is fixedly connected to the edges of the second upper die pressure plate 70. The secondary drawing punch 92 is surrounded by the fixedly connected second lower die pressure plate 80. The second lower die pressure plate 80 matches the second upper die pressure plate 70. The second lower die pressure plate 80 is provided with a horizontal clearance groove 801. The bottom of the first lower die pressure plate 50 is fixedly connected to a vertically movable pressure base 90. The side of the pressure base 90 near the secondary drawing punch 92 is fixedly connected to a horizontally arranged first lifting rod 901 and second lifting rod 902. The first lifting rod 901 extends to the empty work area between the pressure base 90 and the second lower die pressure plate 80. The second lifting rod 902 extends to the clearance groove 801, which is the secondary drawing working area.

[0024] Optionally, the elastic component 60 is a nitrogen spring, which is vertically mounted on the lower die base 2, and its piston rod end is fixedly connected to the pressure base 90.

[0025] When the secondary drawing die 42 and the secondary drawing punch 92 work together, the second upper die pressure plate 70 and the second lower die pressure plate 80 press down on the periphery of the stamped part, so that the stamped part reaches the final drawing depth and shape. Then the die opens. Since the second lifting rod 902 extends to the relief groove 801, and the pressure base 90 can drive the first lifting rod 901 and the second lifting rod 902 to be lifted due to the elastic action of the elastic component 60, the first lifting rod 901 can lift the primary drawing punch 91 and the secondary drawing die 92. The stamped part in the empty station between the punches 92 is smoothly lifted. The second lifting rod 902 can smoothly lift the stamped part on the secondary drawing punch 92, so that the stamped part is separated from the secondary drawing punch 92. By setting the first lifting rod 901 and the second lifting rod 902, the stamped part is lifted to the correct height. In this way, when the feeding mechanism of the mold pushes the strip 2000 forward, it can ensure that the stamped part can smoothly enter the next station or leave the mold, prevent collision with the lower mold or other structures, and help ensure the surface quality of the stamped part.

[0026] The bottom starting end of the upper die holder 1 is equipped with pitch positioning punches 100 on both sides of the strip 2000; the top starting end of the lower die holder 2 is equipped with pitch positioning cutters 200 that match the pitch positioning punches 100 on both sides of the strip 2000. The pitch positioning punches 100 and the pitch positioning cutters 200 cooperate to punch positioning holes in the strip 2000. The top of the lower die holder 2 is equipped with multiple guide rulers 300 on both sides of the strip 2000. The guide rulers 300 are spaced apart along the conveying direction of the strip 2000. A positioning block 3001 is fixedly connected to one of the guide rulers 300 located to the right of the pitch positioning cutter 2000. The positioning block 3001 matches the positioning hole. In this way, when the feeding mechanism of the die pushes the strip 2000 forward, the positioning block 3001 cooperates with the positioning hole to position the strip 2000 in the working area of ​​the lower die holder 2, preventing the strip 2000 from shifting or shaking during the stamping process, and improving the quality and stability of the stamped parts.

[0027] Furthermore, the lower die holder 2 is provided with a folding die 400 on both sides of the strip 2000 at its top, and the folding die 400 is located to the right of the positioning block 3001; the upper die holder 1 is provided with a folding punch 500 at its bottom that matches the folding die 400. The folding punch 500 and the folding die 400 cooperate to process downward-curved folds on both sides of the strip 2000. The downward-curved folds are conducive to abutting against the guide ruler 300 on the outside of the strip 2000, and together with the guide ruler 300, the strip 2000 is positioned, further preventing the strip 2000 from shifting or shaking during the stamping process. The folds can also increase the rigidity of the strip 2000 and improve its bending resistance, making it less prone to deformation during the stamping process.

[0028] Furthermore, a lateral block 600 is installed on the top of the lower die holder 2, outside the bending die 400. A wear-resistant plate 6001 is installed on the side wall of the lateral block 600 near the bending die 400, and the wear-resistant plate 6001 is used to contact the bending punch 500. The lateral block 600 provides lateral positioning and limitation for the bending punch 500, improving the movement accuracy of the bending punch 500 and ensuring the stability of the stamping process.

[0029] In addition, the lower mold base 2 has four vertically fixed first outer limit posts 700 at its top corners; the upper mold base 1 has four vertically fixed second outer limit posts 800 at its bottom corners that match the first outer limit posts 700. The first outer limit posts 700 and the second outer limit posts 800 work together to prevent the mold from closing excessively during mold installation, debugging, and in case of abnormal situations.

[0030] Multiple inner limit blocks 900 are spaced apart on both sides of the top of the lower mold base 2 along the conveying direction of the material strip 2000. The inner limit blocks 900 are used to abut against the bottom of the upper mold base 1 when the upper mold and the lower mold are closed. The inner limit blocks 900 are used to limit the final position of the upper mold pressing down, ensuring that the material is not excessively compressed or the mold cutting edge is not damaged when the mold is closed.

[0031] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A stamping die for a front-end plate connector, comprising an upper die and a lower die, characterized in that: The upper die includes an upper die base, and the bottom of the upper die base is provided with a trimming punch, a drawing die, a precision cutting punch, a punching punch and a cutting punch. The drawing die includes a first drawing die and a second drawing die arranged at intervals. The first drawing die is fixedly connected to a first upper die pressure plate around its four edges. The lower die includes a lower die base, and the top of the lower die base is provided with a cutting edge, a drawing punch, a precision cutting edge, a punching die insert, and a cutting edge. The drawing punch includes a first drawing punch and a second drawing punch arranged at intervals. The first drawing punch is surrounded by a first lower die pressure plate that can move up and down. Multiple elastic components are arranged at intervals below the first lower die pressure plate.

2. The stamping die for the front-end plate connector according to claim 1, characterized in that: The secondary drawing die is fixedly connected to a second upper die pressure plate around its perimeter. The secondary drawing punch is surrounded by a second lower die pressure plate, which is fixedly connected to the perimeter. The second lower die pressure plate has a horizontal clearance groove. The bottom of the first lower die pressure plate is fixedly connected to a pressure base that can move up and down. The side of the pressure base near the secondary drawing punch is fixedly connected to a horizontally arranged first lifting rod and a second lifting rod. The first lifting rod extends between the pressure base and the second lower die pressure plate, and the second lifting rod extends to the clearance groove.

3. The stamping die for the front-end plate connector according to claim 2, characterized in that: The elastic component is a nitrogen spring, which is vertically mounted on the lower mold base, and its piston rod end is fixedly connected to the pressure base.

4. The stamping die for the front-end plate connector according to claim 1, characterized in that: The bottom starting end of the upper die base is equipped with a pitch positioning punch on both sides of the material strip; the top starting end of the lower die base is provided with a pitch positioning cutter that matches the pitch positioning punch on both sides of the material strip. The pitch positioning punch and the pitch positioning cutter cooperate to punch positioning holes in the material strip. The top of the lower die base is provided with multiple guide rulers on both sides of the material strip. The guide rulers are spaced apart along the material strip conveying direction. A positioning block is fixedly connected to one of the guide rulers located to the right of the pitch positioning cutter. The positioning block matches the positioning hole and cooperates with the positioning hole to position the material strip within the working area of ​​the lower die base.

5. The stamping die for the front-end plate connector according to claim 4, characterized in that: The lower die base is provided with folding dies on both sides of the strip at the top, and the folding dies are located on the right side of the positioning block; the upper die base is provided with folding punches at the bottom that match the folding dies.

6. The stamping die for the front-end plate connector according to claim 5, characterized in that: A side block is installed on the top of the lower die base outside the folding die. A wear-resistant plate is installed on the side wall of the side block near the folding die, and the wear-resistant plate is used to contact the folding punch.

7. The stamping die for the front-end plate connector according to claim 1, characterized in that: The lower mold base has four vertically fixed outer limiting posts at the top corners; the upper mold base has four vertically fixed outer limiting posts at the bottom corners that match the first outer limiting posts.

8. The stamping die for the front-end plate connector according to claim 1, characterized in that: The lower mold base has multiple inner limiting blocks spaced at intervals along the conveying direction of the material belt on both sides of the top. The inner limiting blocks are used to abut against the bottom of the upper mold base when the upper mold and the lower mold are closed.

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