Shaping and trimming composite die and method for vehicle body side outer plate

Abstract

The invention relates to a shaping and trimming composite die and method for an automobile body side outer panel, and belongs to the technical field of automobile stamping machining.The shaping and trimming composite die for the automobile body side outer panel comprises a lower die, a shaping movable male die is arranged on the lower die, and a material loading face and a material pressing face are arranged on the shaping movable male die; the shaping and trimming groove is positioned between the material loading surface and the material pressing surface and is provided with a shaping surface and a shearing surface; the upper die is provided with a material pressing plate used for being matched with the material carrying face, a material pressing block used for being matched with the material pressing face and a wedge shaping and trimming insert used for sliding in the depth direction of the shaping and trimming groove, and the wedge shaping and trimming insert is provided with an extrusion face used for being matched with the shaping and trimming groove. And the blade edge is matched with the shearing surface. The fine trimming process content and the shaping process content can be combined into one process, the process steps are reduced, and the mold manufacturing cost and the production cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile stamping processing, and in particular to a composite mold and method for shaping and trimming the outer panel of a vehicle body side. Background Art

[0002] The integral side panel of a passenger car is the most difficult part to manufacture. The part is large in size, and the edge of the product is adjacent to multiple environmental parts, so the assembly accuracy and surface quality requirements are high. The front end of the side panel A-pillar overlaps the front windshield and is adjacent to the fender. The structure is complex, and the dimensional accuracy and appearance quality requirements are high. It is easy to have defects such as stamping cracks and wrinkles.

[0003] At present, there are basically three traditional stamping processes for realizing the front end structural features of the side A-pillar.

[0004] Option 1: See Figure 3 As shown, the first process OP1 is to expand the negative angle area and draw it into shape; the second process OP2 is to refine it to the product contour; and the third process OP3 is to wedge-shape it to the final product structural features.

[0005] Solution 1 requires three process steps to complete. The problem with this process solution is that the section line length of the front feature of the side A-pillar changes dramatically. During the shaping process, the material is freely formed and the flow is uncontrollable. There are wrinkle defects on the overlap surface of the front windshield and the side wall of the front end of the side A-pillar, which affects the assembly accuracy and appearance quality requirements.

[0006] Option 2: See Figure 4 As shown, the first process OP1 first expands the negative angle area of ​​the product in the stamping direction and draws it; the second process OP2 roughly trims the area and removes most of the drawing supplementary features; the third process OP3 designs an inclined wedge elastic pressing structure in the drawing supplementary feature area left by the rough trimming in the second process OP2 under the conventional pressing structure in the product area, and uses the inclined wedge to shape the negative angle expansion feature of the area into the product feature; the fourth process OP4 uses the inclined wedge mechanism to fine-tune the remaining material of the area to the final product contour. This solution requires four process steps to complete.

[0007] Solution 2 designs an outer elastic pressing structure in the wedge shaping process. The pressing is stable and easy to adjust. During the shaping process, it can effectively restrict the free flow of materials and reduce the risk of wrinkling defects, which is beneficial to ensuring the quality of parts. However, it needs to add a finishing process. The overall solution requires four steps to achieve.

[0008] Option 3: See Figure 5 and Figure 6As shown, the first process OP1 first expands the negative angle area of ​​the product in the stamping direction and draws it; the second process OP2 performs rough trimming on the area and cuts off most of the drawing supplementary features; the third process OP3 designs a wedge rigid pressing structure in the conventional pressing structure of the product area in the waste area of ​​the drawing supplementary features left by the rough trimming in the second process OP2, the trimming insert 200 is installed on the shaping insert 300, and the shaping insert 300 is installed on the wedge, and the negative angle expansion feature of the area is shaped to the product feature by the wedge, and the residual material of the area is finely trimmed to the final product contour. This solution requires three process steps to complete.

[0009] In the third scheme, a rigid clamping block 400 is designed in the wedge shaping process. In the shaping process, the free flow of materials is restricted, the risk of wrinkling defects is reduced, and the quality of parts is guaranteed. At the same time, the fine trimming is completed. Compared with the second scheme, the third scheme reduces one process, but the third scheme uses a rigid clamping block 400 and a shaping and trimming punch 500 for rigid clamping, which has poor adjustment flexibility, and after the stamping is completed, the trimming insert 200 is prone to carry material during the upper die retreat process. Summary of the invention

[0010] In response to the shortcomings or one of the shortcomings of the above-mentioned background technology, an embodiment of the present application provides a composite mold and method for shaping and trimming the side outer panel of the vehicle body. For the front end structure of the side A-pillar, it is possible to combine the contents of the fine trimming process and the shaping process into one process, thereby reducing the process steps and reducing the mold manufacturing cost and production cost.

[0011] In a first aspect, an embodiment of the present application provides a composite mold for shaping and trimming a vehicle body side outer panel, comprising:

[0012] A lower die is provided with a shaping movable punch, the shaping movable punch is provided with a material-carrying surface and a material-pressing surface, and a shaping trimming groove located between the material-carrying surface and the material-pressing surface, the shaping trimming groove having a shaping surface and a shearing surface;

[0013] The upper mold is provided with a pressing plate for cooperating with the loading surface, a pressing block for cooperating with the pressing surface, and a beveled wedge shaping and trimming insert for sliding into the depth direction of the shaping and trimming groove; the beveled wedge shaping and trimming insert is provided with an extrusion surface for cooperating with the shaping and trimming groove, and a blade edge for cooperating with the shear surface.

[0014] In the first aspect, in some embodiments, in the sliding direction of the oblique wedge shaping trimming insert, the shaping surface has a shaping start point and a shaping end point, and the shear surface is located between the shaping start point and the shaping end point.

[0015] In the first aspect, in some embodiments, the shaping surface includes a shaping side wall adjacent to the loading surface, and a shaping bottom wall adjacent to the shaping side wall;

[0016] In the sliding direction of the oblique wedge shaping and trimming insert, the shearing surface protrudes from the shaping bottom wall, and the apex of the shearing surface does not exceed the apex of the shaping side wall.

[0017] In the first aspect, in some embodiments, in the sliding direction of the oblique wedge shaping and trimming insert, the apex of the shear surface extends beyond the shaping bottom wall by 3 mm to 5 mm.

[0018] In the first aspect, in some embodiments, a finishing punch is embedded on the shaping movable punch and together with the shaping movable punch, forms the shaping trimming groove, and one end of the finishing punch protrudes from the shaping movable punch to form the pressing surface and the shearing surface.

[0019] In the first aspect, in some embodiments, in the sliding direction of the oblique wedge shaping and trimming insert, a travel limiting surface for limiting the oblique wedge shaping and trimming insert is provided on the pressing block.

[0020] In the first aspect, in some embodiments, the pressing surface is a continuous curved surface, and in the sliding direction of the oblique wedge shaping and trimming insert, an end of the pressing surface close to the shaping and trimming groove does not exceed the loading surface.

[0021] In the first aspect, in some embodiments, the oblique wedge shaping and trimming insert is provided with a mounting groove for accommodating the pressing block, and a first elastic element for elastically pressing the pressing block is provided in the mounting groove.

[0022] In the first aspect, in some embodiments, the shaping movable punch is slidably connected to the lower die, and the upper die is provided with a first driving block for driving the shaping movable punch to move obliquely upward;

[0023] The upper die is provided with a second driving block for driving the oblique wedge shaping and trimming insert to move obliquely downward, and a second elastic element for elastically pressing the pressing plate.

[0024] In a second aspect, an embodiment of the present application provides a method for shaping and trimming a vehicle body side outer panel, using any of the above-mentioned composite molds for shaping and trimming a vehicle body side outer panel, the method comprising:

[0025] S1. When the mold is open, the workpiece is placed, and the workpiece covers the loading surface of the shaping movable punch of the lower mold, and one end extends to the pressing surface of the shaping movable punch;

[0026] S2, the upper die moves to the lower die, the pressing plate and the pressing block on the upper die contact the workpiece and start pressing, the pressing plate presses one side of the workpiece on the loading surface, and the pressing block presses the other side of the workpiece on the pressing surface;

[0027] S3, after the pressing action is completed, the upper die continues to move to the lower die, and the oblique wedge shaping and trimming insert on the upper die slides into the shaping and trimming groove of the shaping movable punch in the depth direction, and the extrusion surface on the oblique wedge shaping and trimming insert cooperates with the shaping surface on the shaping and trimming groove to start shaping the workpiece;

[0028] S4, the upper die continues to approach the lower die, the edge of the inclined wedge shaping and trimming insert contacts the shear surface of the shaping and trimming groove, and the trimming work begins;

[0029] S5. After trimming is completed, the upper die continues to approach the lower die, and the extrusion surface on the inclined wedge trimming insert cooperates with the shaping surface on the trimming groove to continue shaping, so that the end of the workpiece flows into the shaping side. After the upper die and the lower die are completely closed, the shaping work is completed.

[0030] The beneficial effects of the technical solution provided by this application include:

[0031] The embodiment of the present application provides a composite mold and method for shaping and trimming the outer panel of the vehicle body side. The lower mold is provided with a shaping movable punch, and the shaping movable punch is provided with a loading surface and a pressing surface, and a shaping and trimming groove located between the loading surface and the pressing surface, and the shaping and trimming groove has a shaping surface and a shearing surface;

[0032] The upper die is provided with a pressing plate for cooperating with the loading surface, a pressing block for cooperating with the pressing surface, and an inclined wedge shaping and trimming insert for sliding into the depth direction of the shaping and trimming groove. The inclined wedge shaping and trimming insert is provided with an extrusion surface for cooperating with the shaping and trimming groove, and a blade edge for cooperating with the shear surface.

[0033] Therefore, in the process of closing the upper and lower dies, the pressing plate and the loading surface can realize the inner pressing of the product part, and the pressing block and the pressing surface can realize the outer pressing of the waste part. When the sheet metal is pressed both inside and outside, the inclined wedge shaping and trimming insert slides in along the depth direction of the shaping and trimming groove, and the shaping action is performed through the cooperation of the extrusion surface and the shaping surface.

[0034] Before the shaping action is completed, the edge is finely trimmed by the cooperation of the blade edge and the shear surface, and the shaping action is completed after the upper mold and the lower mold are completely closed. Therefore, for the front end structure of the side A-pillar, the fine trimming process content and the shaping process content can be combined into one process, which reduces the process steps compared to the existing solution 2, and simplifies the structure compared to the existing solution 3, that is, this solution uses the oblique wedge shaping trimming insert to achieve shaping and trimming at the same time, and does not need to set up the trimming insert and the shaping insert separately, thereby reducing the mold manufacturing cost and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a structural schematic diagram of the side A-pillar of the prior art;

[0037] Figure 2 for Figure 1 Schematic diagram of the cross section at AA;

[0038] Figure 3 It is a process schematic diagram of solution 1 of the prior art;

[0039] Figure 4 It is a process diagram of the second scheme of the prior art;

[0040] Figure 5 It is a process diagram of scheme 3 of the prior art;

[0041] Figure 6 It is a structural schematic diagram of a mold in the prior art;

[0042] Figure 7 This is a schematic diagram of the structure of the composite mold of an embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of the implementation of the composite mold of the embodiment of the present application;

[0044] Fig. 9 This is a schematic diagram of the structure of the shaping and trimming groove according to an embodiment of the present application;

[0045] Fig.10 This is a schematic structural diagram of the oblique wedge shaping and trimming insert according to an embodiment of the present application.

[0046] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0047] 100, side A-pillar; 200, trimming insert; 300, shaping insert; 400, rigid clamping block; 500, shaping trimming punch;

[0048] 1. Shaping movable punch; 11. Loading surface; 12. Pressing surface; 13. Shaping trimming groove; 131. Shaping surface; 1311. Shaping side wall; 1312. Shaping bottom wall; 132. Shearing surface; 2. Pressing plate; 3. Pressing block; 31. Travel limit surface; 4. Wedge shaping trimming insert; 41. Extrusion surface; 42. Blade edge; 43. Mounting groove; 5. First elastic element; 6. Finishing trimming punch; 7. First drive block; 8. Second drive block; 9. Second elastic element. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] In response to the shortcomings or one of the shortcomings of the above-mentioned background technology, an embodiment of the present application provides a composite mold and method for shaping and trimming the side outer panel of the vehicle body. For the front end structure of the side A-pillar, it is possible to combine the contents of the fine trimming process and the shaping process into one process, thereby reducing the process steps and reducing the mold manufacturing cost and production cost.

[0051] See also Figures 7 to 10 As shown, the first aspect of the embodiment of the present application provides a composite mold for shaping and trimming a side outer panel of a vehicle body, comprising:

[0052] A lower die is provided with a shaping movable punch 1, the shaping movable punch 1 is provided with a material loading surface 11 and a material pressing surface 12, and a shaping trimming groove 13 located between the material loading surface 11 and the material pressing surface 12, the shaping trimming groove 13 has a shaping surface 131 and a shearing surface 132;

[0053] The upper mold is provided with a pressing plate 2 for cooperating with the loading surface 11, a pressing block 3 for cooperating with the pressing surface 12, and an inclined wedge shaping and trimming insert 4 for sliding into the shaping and trimming groove 13 in the depth direction. The inclined wedge shaping and trimming insert 4 is provided with an extrusion surface 41 for cooperating with the shaping and trimming groove 13, and a blade edge 42 for cooperating with the shear surface 132.

[0054] The shaping movable punch 1 of the shaping and trimming composite die for the body side outer panel of the embodiment of the present application is provided with a material loading surface 11 and a material pressing surface 12, and a shaping and trimming groove 13 located between the material loading surface 11 and the material pressing surface 12, and the shaping and trimming groove 13 has a shaping surface 131 and a shearing surface 132. The lower die is provided with a material pressing plate 2, a material pressing block 3 and an inclined wedge shaping and trimming insert 4, and the inclined wedge shaping and trimming insert 4 has an extrusion surface 41 and a blade edge 42.

[0055] During the closing process of the upper and lower dies, the pressing plate 2 and the loading surface 11 can realize the inner pressing of the product part, and the pressing block 3 and the pressing surface 12 can realize the outer pressing of the waste part. When the sheet material is pressed both inside and outside, the inclined wedge shaping and trimming insert 4 slides in the depth direction of the shaping and trimming groove 13, and the shaping action is performed through the cooperation of the extrusion surface 41 and the shaping surface 131.

[0056] Before the shaping action is completed, the edge 42 and the shearing surface 132 are used to perform fine trimming, and the shaping action is completed after the upper mold and the lower mold are completely closed. Therefore, for the front end structure of the side A-pillar 100 of the product, the fine trimming process content and the shaping process content can be combined into one process, reducing the process steps and reducing the mold manufacturing cost and production cost.

[0057] It should be noted that the process scheme of this application is that the negative angle area of ​​the product in the stamping direction is first expanded and drawn in the first process; the second process is to perform rough trimming on the area and remove most of the drawing supplementary features; the third process is to achieve the wedge shaping of the outer elastic pressing material and composite fine trimming to the product contour. This technical scheme is mainly the invention and innovation of the third process.

[0058] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel. The composite mold for shaping and trimming the outer panel of the vehicle body side panel has a shaping surface 131 having a shaping starting point and a shaping end point in the sliding direction of the oblique wedge shaping and trimming insert 4, and the shear surface 132 is located between the shaping starting point and the shaping end point.

[0059] The shearing surface 132 of the embodiment of the present application is located between the shaping starting point and the shaping end point, so that the product shaping process can utilize the shearing surface 132 to cooperate with the bevel shaping and trimming insert 4 for fine trimming. After the fine trimming is completed, the bevel shaping and trimming insert 4 continues to move toward the shaping end point, so that after the fine trimming, the end of the product close to the waste material can flow to the shaping side and will not abut on the shearing surface 132, thereby effectively avoiding the problem of lower mold jamming.

[0060] In some optional embodiments, see Figures 7 to 10As shown, the embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side, wherein the shaping surface 131 of the composite mold for shaping and trimming the outer panel of the vehicle body side includes a shaping side wall 1311 adjacent to the loading surface 11, and a shaping bottom wall 1312 adjacent to the shaping side wall 1311;

[0061] In the sliding direction of the oblique wedge shaping and trimming insert 4 , the shearing surface 132 protrudes from the shaping bottom wall 1312 , and the apex of the shearing surface 132 does not exceed the apex of the shaping side wall 1311 .

[0062] The shaping surface 131 of the embodiment of the present application includes a shaping side wall 1311 and a shaping bottom wall 1312. The shaping side wall 1311 and the shaping bottom wall 1312 cooperate to form a negative angle at the front end structure of the side A-pillar 100 of the vehicle body side outer panel product, that is, the shaping side wall 1311 cooperates with the oblique wedge shaping trimming insert 4 to form a first bending surface with a negative angle, and the shaping bottom wall 1312 cooperates with the oblique wedge shaping trimming insert 4 to form a second bending surface with a negative angle.

[0063] Among them, in the sliding direction of the oblique wedge shaping and trimming insert 4, the shear surface 132 protrudes from the shaping bottom wall 1312, and the apex of the shear surface 132 does not exceed the apex of the shaping side wall 1311, so that before the second bending surface is extruded and formed, the shear surface 132 cooperates with the blade edge 42 on the oblique wedge shaping and trimming insert 4 to fine-trim the second bending surface to remove waste. After the fine-trim is completed, the oblique wedge shaping and trimming insert 4 can continue to approach the shaping bottom wall 1312 to form the second bending surface.

[0064] Since the second bending surface is finely trimmed before complete forming, the end of the second bending surface close to the waste material can flow toward the shaping side under the extrusion of the oblique wedge shaping and trimming insert 4, and will not abut on the shear surface 132, thereby effectively avoiding the problem of lower die jamming. In addition, in this embodiment, the shear surface 132 is arranged close to the shaping bottom wall 1312, so that fine trimming can be performed before the shaping work is almost finished, thereby ensuring the molding quality of the parts.

[0065] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel, in which the vertex of the shear surface 132 of the composite mold for shaping and trimming the outer panel of the vehicle body side panel exceeds the plane where the shaping bottom wall 1312 is located by 3mm to 5mm in the sliding direction of the oblique wedge shaping and trimming insert 4.

[0066] The apex of the shearing surface 132 of the embodiment of the present application extends by 3mm to 5mm beyond the plane of the shaping bottom wall 1312 in the sliding direction of the oblique wedge shaping and trimming insert 4, leaving space for the blade of the oblique wedge shaping and trimming insert 4 to perform fine trimming work. At the same time, it can also be achieved that the product contour has an inflow of 3mm to 5mm from the beginning of fine trimming to the end of fine trimming and shaping, that is, the product contour will not abut the shearing surface 132, effectively avoiding the problem of material jamming in the lower mold.

[0067] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel, wherein a finishing punch 6 is embedded on the shaping movable punch 1 of the composite mold for shaping and trimming the outer panel of the vehicle body side panel, and the finishing punch 6 together with the shaping movable punch 1 forms a shaping and trimming groove 13, and one end of the finishing punch 6 protrudes from the shaping movable punch 1 to form a pressing surface 12 and a shearing surface 132.

[0068] The trimming punch 6 is embedded and fixed on the shaping movable punch 1 of the embodiment of the present application. The trimming punch 6 and the shaping movable punch 1 together form a shaping trimming groove 13. The trimming punch 6 protrudes from one end of the shaping movable punch 1 to form a pressing surface 12 and a shearing surface 132. Compared with directly processing the pressing surface 12 and the shearing surface 132 on the shaping movable punch 1, the processing difficulty can be reduced and the manufacturing accuracy of the pressing surface 12 and the shearing surface 132 can be improved.

[0069] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel. In the sliding direction of the oblique wedge shaping and trimming insert 4, a travel limiting surface 31 for limiting the oblique wedge shaping and trimming insert 4 is provided on the pressing block 3.

[0070] The pressing block 3 of the embodiment of the present application is provided with a travel limit surface 31, which can limit the end point of the inclined wedge shaping and trimming insert 4 sliding into the shaping and trimming groove 13, thereby preventing the inclined wedge shaping and trimming insert 4 from being too close to the shaping bottom wall 1312 and causing excessive pressure on the product.

[0071] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel, wherein the pressing surface 12 of the composite mold for shaping and trimming the outer panel of the vehicle body side panel is a continuous curved surface, and in the sliding direction of the oblique wedge shaping and trimming insert 4, the end of the pressing surface 12 close to the shaping and trimming groove 13 does not exceed the loading surface 11.

[0072] The press surface 12 of the embodiment of the present application is a continuous zigzag surface, and the zigzag surface cooperates with the press block 3 to ensure the press effect and the shaping quality of the product. In addition, in the sliding direction of the oblique wedge shaping trimming insert 4, the end of the zigzag surface close to the shaping trimming groove 13 does not exceed the loading surface 11, that is, in the sliding direction of the oblique wedge shaping trimming insert 4, the vertex of the shear surface 132 does not exceed the vertex of the shaping surface 131.

[0073] The shear surface 132 is located between the shaping starting point and the shaping end point. During the product shaping process, the shear surface 132 can be used in conjunction with the bevel shaping and trimming insert 4 for fine trimming. After the fine trimming is completed, the bevel shaping and trimming insert 4 continues to move toward the shaping end point, so that after the fine trimming, the end of the product close to the waste material can flow toward the shaping side and will not abut against the shear surface 132, thereby effectively avoiding the problem of lower mold jamming.

[0074] In some optional embodiments, see Figures 7 to 10 As shown, an embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side panel, wherein the oblique wedge shaping and trimming insert 4 of the composite mold for shaping and trimming the outer panel of the vehicle body side panel is provided with a mounting groove 43 for accommodating a pressing block 3, and a first elastic element 5 for elastically pressing the pressing block 3 is provided in the mounting groove 43.

[0075] The inclined wedge shaping and trimming insert 4 of the embodiment of the present application is provided with a mounting groove 43, and the press block 3 is slidably mounted in the mounting groove 43. At the same time, a first elastic element 5 is mounted in the mounting groove 43, and the first elastic element 5 provides a pressure source for the press block 3, so that before the inclined wedge shaping and trimming insert 4 slides into the shaping and trimming groove 13, the press block 3 can press the product plate on the press surface 12 under the elastic top pressure of the first elastic element 5. Exemplarily, the first elastic element 5 can adopt a nitrogen cylinder.

[0076] In some optional embodiments, see Figures 7 to 10 As shown, the embodiment of the present application provides a composite mold for shaping and trimming the outer panel of the vehicle body side, wherein a shaping movable punch 1 of the composite mold for shaping and trimming the outer panel of the vehicle body side is slidably connected to a lower mold, and a first driving block 7 for driving the shaping movable punch 1 to move obliquely upward is provided on the upper mold;

[0077] The upper die is provided with a second driving block 8 for driving the oblique wedge shaping and trimming insert 4 to move obliquely downward, and a second elastic element 9 for elastically pressing the pressing plate 2 .

[0078] The upper die and the lower die of the embodiment of the present application are molded together in the vertical direction. For the front end structure of the side A-pillar 100 of the product, the lower die is provided with a slideway for the shaping movable punch 1 to slide obliquely upward, and the upper die is provided with a slideway for the oblique wedge shaping trimming insert 4 to slide obliquely downward. The shaping movable punch 1 is driven by the first driving block 7 on the upper die, and the oblique wedge shaping trimming insert 4 is driven by the second driving block 8 on the upper die. In the process of the upper die and the lower die being molded together, the pressing block 3 carried by the oblique wedge shaping trimming insert 4 and the shaping movable punch 1 can realize stable pressing of the product plate.

[0079] In addition, the second elastic element 9 provided on the upper die provides a pressure source for the press plate 2. Before the wedge shaping trimming insert 4 slides into the shaping trimming groove 13, the press plate 2 can press the product plate against the shaping movable punch 1 under the elastic pressure of the second elastic element 9. For example, the first elastic element 5 can be a nitrogen cylinder.

[0080] See also Figures 7 to 10 As shown, the second aspect of the embodiment of the present application provides a method for shaping and trimming a side outer panel of a vehicle body, using the shaping and trimming composite mold for the side outer panel of the vehicle body of any of the above embodiments, the method comprising:

[0081] S1. When the mold is open, the workpiece is placed, and the workpiece covers the loading surface 11 of the shaping movable punch 1 of the lower mold, and one end extends to the pressing surface 12 of the shaping movable punch 1;

[0082] S2, the upper die moves toward the lower die, the pressing plate 2 and the pressing block 3 on the upper die contact the workpiece and start pressing, the pressing plate 2 presses one side of the workpiece on the loading surface 11, and the pressing block 3 presses the other side of the workpiece on the pressing surface 12;

[0083] S3, after the pressing action is completed, the upper die continues to move to the lower die, and the oblique wedge shaping trimming insert 4 on the upper die slides into the shaping trimming groove 13 of the shaping movable punch 1 in the depth direction, and the extrusion surface 41 on the oblique wedge shaping trimming insert 4 cooperates with the shaping surface 131 on the shaping trimming groove 13 to start shaping the workpiece;

[0084] S4, the upper die continues to approach the lower die, the edge 42 on the oblique wedge shaping and trimming insert 4 contacts the shear surface 132 on the shaping and trimming groove 13, and the trimming work begins;

[0085] S5. After trimming is completed, the upper die continues to approach the lower die, and the extrusion surface 41 on the oblique wedge trimming insert 4 cooperates with the shaping surface 131 on the trimming groove 13 to continue shaping, so that the end of the workpiece flows into the shaping side. After the upper die and the lower die are completely closed, the shaping work is completed.

[0086] The embodiment of the present application mainly introduces a three-step side A-pillar 100 end forming process structure, which realizes the completion of the oblique wedge shaping and finishing contents with the outer elastic pressing structure in the shaping sequence. This scheme is implemented by three process steps.

[0087] Specifically, the first process is to expand the negative angle area of ​​the product in the stamping direction and draw it; the second process is to roughly trim the area and cut off most of the drawing supplementary features; the third process, the upper die: under the conventional pressing structure in the product area, the elastic pressing structure and the oblique wedge shaping and trimming insert 4 are designed in the waste area of ​​the drawing supplementary features left over from the rough trimming in the second process; the lower die: the shaping and trimming groove 13 is designed on the shaping active punch 1 of the lower die. The working process is to use the oblique wedge shaping and trimming insert 4 to shape the negative angle expansion feature of the part to the product feature, and at the same time, the residual material of the part is finely trimmed to the final product contour.

[0088] This technical solution is mainly an invention and innovation of the third process. In the shaping process, an outer elastic pressing structure can be used to avoid unfavorable adjustment of the outer rigid clamping structure during shaping. The contents of the fine trimming process and the shaping process are combined into one process. Compared with the second solution of the prior art, one process is reduced, thereby reducing the mold manufacturing cost and production cost.

[0089] Working process of this application mold:

[0090] As the upper die moves downward under the action of the press slide, the shaping movable punch 18 of the lower die moves obliquely upward to the final product state position under the action of the first driving block 7 of the upper die.

[0091] Subsequently, the pressing plate 2 of the upper die moves downward with the upper die under the action of the second elastic element 9, contacts the workpiece, and starts the pressing action.

[0092] After the pressing plate 2 completes a certain pressing action, the oblique wedge shaping and trimming insert 4 of the upper die moves obliquely downward under the action of the second driving block 8, wherein the pressing block 3 slides with the oblique wedge shaping and trimming insert 4 under the drive of the first elastic element 5, and after contacting the workpiece, it starts the outer side pressing action together with the upper finishing trimming punch 6 of the shaping movable punch 1 of the lower die.

[0093] The upper die continues to descend, and the shaping working part of the inclined wedge shaping and trimming insert 4 of the upper die contacts the workpiece, and together with the shaping movable punch 1 of the lower die, the shaping action begins. Before the shaping reaches the bottom, the edge 42 of the fine trimming working part of the inclined wedge shaping and trimming insert 4 of the upper die contacts the shear surface 132 on the fine trimming punch 6 of the lower die, and the trimming work begins. After the upper die runs to the bottom, the shaping and trimming work is completed.

[0094] The shaping and trimming method of the vehicle body side outer panel of the present application has the following advantages:

[0095] 1. When the oblique wedge shaping and trimming insert 4 contacts the shaping movable punch 1 and starts shaping, the pressing plate 2 and the shaping movable punch 1 have achieved the inner pressing of the product part, and the pressing plate 2 and the finishing trimming punch 6 have achieved the outer pressing of the waste part. When the sheet metal is pressed both inside and outside, the shaping action can be completed well to ensure the quality of the parts.

[0096] 2. 3mm to 5mm before the end point of shaping, from the beginning to the end of the trimming, the pressure plate 2 and the trimming punch 6 realize the outer side pressing of the waste part, and the pressure plate 2 and the shaping active punch 1 realize the inner side pressing of the product part, which can ensure the quality of the trimming.

[0097] 3. The working part of the trimming punch 6 of the lower die is 3mm to 5mm higher than the shaping movable punch 1 in the working direction of the oblique wedge shaping trimming insert 4, leaving space for the trimming blade of the oblique wedge shaping trimming insert 4 to enter, and at the same time, it can also achieve an inflow of 3mm to 5mm in the product contour from the beginning of trimming to the end of trimming and shaping, effectively avoiding the problem of material jamming in the lower die.

[0098] 4. The trimming edge of the upper die is arranged on the product side, and the trimming punch 6 of the lower die is arranged on the waste side. Contrary to the traditional arrangement structure, while realizing the elastic pressing function on the waste side, after trimming, it also avoids the problem of the trimming edge of the upper die 4 carrying material, and effectively avoids the problem of the upper die returning with material after the stamping is completed.

[0099] 5. The present application combines the finishing edge process content into the shaping process with outer pressing, which reduces the number of processes and reduces costs.

[0100] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0101] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0102] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A composite mold for shaping and trimming the outer panel of a vehicle body, characterized in that: include: A lower die is provided with a shaping movable punch (1), the shaping movable punch (1) is provided with a material loading surface (11) and a material pressing surface (12), and a shaping trimming groove (13) located between the material loading surface (11) and the material pressing surface (12), the shaping trimming groove (13) having a shaping surface (131) and a shearing surface (132); An upper die is provided with a pressing plate (2) for cooperating with the material loading surface (11), a pressing block (3) for cooperating with the pressing surface (12), and an inclined wedge shaping and trimming insert (4) for sliding into the shaping and trimming groove (13) in the depth direction; the inclined wedge shaping and trimming insert (4) is provided with an extrusion surface (41) for cooperating with the shaping and trimming groove (13), and a blade edge (42) for cooperating with the shearing surface (132).

2. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: In the sliding direction of the oblique wedge shaping trimming insert (4), the shaping surface (131) has a shaping starting point and a shaping end point, and the shearing surface (132) is located between the shaping starting point and the shaping end point.

3. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1 or 2, characterized in that: The shaping surface (131) comprises a shaping side wall (1311) adjacent to the material loading surface (11), and a shaping bottom wall (1312) adjacent to the shaping side wall (1311); In the sliding direction of the oblique wedge shaping trimming insert (4), the shearing surface (132) protrudes from the shaping bottom wall (1312), and the apex of the shearing surface (132) does not exceed the apex of the shaping side wall (1311).

4. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 3, characterized in that: In the sliding direction of the oblique wedge shaping trimming insert (4), the apex of the shearing surface (132) exceeds the shaping bottom wall (1312) by 3 mm to 5 mm.

5. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: The shaping movable punch (1) is embedded with a finishing punch (6) which, together with the shaping movable punch (1), forms the shaping trimming groove (13); one end of the finishing punch (6) protruding from the shaping movable punch (1) forms the pressing surface (12) and the shearing surface (132).

6. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: In the sliding direction of the oblique wedge shaping and trimming insert (4), a travel limiting surface (31) for limiting the position of the oblique wedge shaping and trimming insert (4) is provided on the pressing block (3).

7. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: The pressing surface (12) is a continuous curved surface. In the sliding direction of the oblique wedge shaping and trimming insert (4), the end of the pressing surface (12) close to the shaping and trimming groove (13) does not exceed the loading surface (11).

8. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: The oblique wedge shaping and trimming insert (4) is provided with a mounting groove (43) for accommodating the pressing block (3), and a first elastic element (5) for elastically pressing the pressing block (3) is provided in the mounting groove (43).

9. The composite mold for shaping and trimming the vehicle body side outer panel according to claim 1, characterized in that: The shaping movable punch (1) is slidably connected to the lower die, and the upper die is provided with a first driving block (7) for driving the shaping movable punch (1) to move obliquely upward; The upper die is provided with a second driving block (8) for driving the oblique wedge shaping and trimming insert (4) to move obliquely downward, and a second elastic element (9) for elastically pressing the pressing plate (2).

10. A method for shaping and trimming a vehicle body side outer panel, using the composite mold for shaping and trimming a vehicle body side outer panel according to any one of claims 1 to 9, characterized in that: The method comprises: When the mold is open, the workpiece is placed, the workpiece covers the material loading surface (11) of the shaping movable punch (1) of the lower mold, and one end of the workpiece extends to the material pressing surface (12) of the shaping movable punch (1); The upper die moves toward the lower die, and the pressing plate (2) and the pressing block (3) on the upper die contact the workpiece and start pressing, the pressing plate (2) presses one side of the workpiece onto the loading surface (11), and the pressing block (3) presses the other side of the workpiece onto the pressing surface (12); After the pressing action is completed, the upper die continues to move toward the lower die, and the inclined wedge shaping trimming insert (4) on the upper die slides into the shaping trimming groove (13) of the shaping movable punch (1) in the depth direction, and the extrusion surface (41) on the inclined wedge shaping trimming insert (4) cooperates with the shaping surface (131) on the shaping trimming groove (13) to start shaping the workpiece; The upper die continues to approach the lower die, and the blade edge (42) on the oblique wedge shaping and trimming insert (4) contacts the shear surface (132) on the shaping and trimming groove (13), and the trimming work begins; After the trimming is completed, the upper die continues to approach the lower die, and the extrusion surface (41) on the inclined wedge trimming insert (4) cooperates with the shaping surface (131) on the trimming groove (13) to continue shaping, so that the end of the workpiece flows into the shaping side. After the upper die and the lower die are completely closed, the shaping work is completed.

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