A forming die and forming method for a front header outer panel

Abstract

The application discloses a forming die and a forming method for a front roof outer plate. The forming die comprises an upper die plate and a lower die plate arranged oppositely, and a waste material cutting assembly arranged between the upper die plate and the lower die plate. The height of the blade of the second waste material cutter is 1-2 times the thickness of the stamping material, and the cutting amount of the blade edge of the second waste material cutter and the first waste material cutter is 1-2 times the thickness of the stamping material. The separated waste material is cut again by the linkage operation of the first waste material cutter and the second waste material cutter to form dispersed waste material sections. During the cutting process, the end of the waste material section smoothly slides out of the blade edge of the second waste material cutter to the working space after being cut off. When the deformed waste material pops out of the blade edge of the second waste material cutter, the waste material is effectively prevented from being hung on the back of the second waste material cutter, the waste material is prevented from being stuck, the working smoothness is improved, the continuous value and intervention of manual work are avoided, and the production operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile stamping part manufacturing, in particular to a forming die and forming method for a front roof outer plate. BACKGROUND

[0002] With the improvement of the production automation level of automobile stamping parts, the universal application of automatic transmission of multi-station dies requires that various waste materials of stamping parts automatically and smoothly slide out of the die and the press bed workbench, fall into the ground waste pit and then be transported away by the underground transmission belt.

[0003] In the production process of the front roof outer plate on the vehicle body roof, the stamping direction is first determined according to the principle of minimum drawing depth, the shape of the pressing surface is close to the shape of the final part to ensure the balanced material flow of each part; then the trimming and punching of the trimming side are performed, and the local shape surface is shaped; then the contour line of the front windshield lap joint part is shaped along the circumference, and the side shaping of the gutter part is performed after trimming and punching of the large hole of the sunroof; then trimming and punching side punching and circumferential flanging are performed. In the automatic production process, the blanking waste of the front windshield lap joint part is not discharged smoothly, the waste is stuck between the waste knives, and the production rhythm is affected due to the poor waste sliding, and there is also a safety hazard. SUMMARY

[0004] In view of the defects in the prior art, the present application provides a forming die and forming method for a front roof outer plate to solve the problem that the waste is stuck in the production operation in the forming process of the front roof outer plate in the prior art.

[0005] The above-mentioned purpose of the present application is mainly achieved by the following technical solutions:

[0006] A forming die for a front roof outer plate, the forming die comprising:

[0007] Oppositely arranged upper and lower die plates, a blanking assembly is arranged between the upper and lower die plates, the blanking assembly is used to separate waste on the stamping material;

[0008] A waste cutting assembly is arranged between the upper and lower die plates, the waste cutting assembly comprises a first waste knife arranged on the upper die plate and a second waste knife arranged on the lower die plate, the height of the blade of the second waste knife is 1-2 times the thickness of the stamping material, and the cutting amount of the blade edge of the second waste knife and the first waste knife is 1-2 times the thickness of the stamping material, when the blanking assembly separates the waste on the stamping material, the waste cutting assembly cuts off the waste and forms a waste section, and the opposite side of the blade edge of the second waste knife has a working space for sliding out of the waste section.

[0009] In an optional embodiment, the second waste material cutter is provided with a chamfer on the side away from the first waste material cutter.

[0010] In an optional embodiment, the second waste material cutter has a blade width of 15-20 mm, and is provided with a back clearance on the side away from the first waste material cutter.

[0011] In an optional embodiment, a spacer plate is provided between the first waste material cutter and the upper die plate, and the spacer plate has a thickness not less than the thickness of the punched material, so that the cutting amount of the first waste material cutter enters the back clearance, and the edge of the waste material section moves from the blade of the second waste material cutter to the back clearance.

[0012] In an optional embodiment, the blanking assembly comprises an upper trimming blade and a lower trimming blade for shearing the punched material, the upper trimming blade is fixed on the upper die plate, the lower trimming blade is fixed on the lower die plate, and a clearance is provided between the upper trimming blade and the second waste material cutter.

[0013] In an optional embodiment, the upper trimming blade comprises a plurality of continuous inclined blade sections, the plurality of inclined blade sections are in a wavy shape, the height of the blade edge of the inclined blade section is inclined linearly by 3-8 mm, and the length of the blade edge of the inclined blade section is 220-280 mm.

[0014] In an optional embodiment, the first waste material cutter has a side length greater than the length of the blade edge, and the second waste material cutter has a side length greater than the length of the blade edge.

[0015] In an optional embodiment, the waste material cutting assembly is provided with a plurality of groups and is arranged at intervals between the upper die plate and the lower die plate, and a waste material guide rod is provided between adjacent waste material cutting assemblies to guide the waste material section to be discharged.

[0016] In an optional embodiment, the upper die plate is provided with a ejector pin device for material ejection.

[0017] Based on the same inventive concept, the application further provides a forming method of a front roof outer panel, characterized in that the forming method is performed by using the forming die described above, and the forming method comprises:

[0018] Placing the punched material between the punch and the die in the blanking assembly;

[0019] Driving the upper die plate and the lower die plate to be pressed against each other by the driving mechanism, and the blanking assembly separates the waste material from the punched material;

[0020] By the driving mechanism continuing to drive the upper die plate and the lower die plate to press each other at a second level, the first scrap cutter and the second scrap cutter in the scrap cutting assembly cut the scrap and form a scrap segment, the scrap segment is separated from the scrap cutting assembly and discharged;

[0021] The driving mechanism drives the upper die plate and the lower die plate to separate from each other, and the stamping work of the front roof outer plate is completed.

[0022] Compared with the prior art, the application has the advantages that:

[0023] The forming die for the front roof outer plate in the application comprises: an upper die plate and a lower die plate arranged oppositely, and a scrap cutting assembly arranged between the upper die plate and the lower die plate, a blanking assembly is arranged between the upper die plate and the lower die plate, the blanking assembly is used for separating scrap on a stamping material, the scrap cutting assembly comprises a first scrap cutter arranged on the upper die plate and a second scrap cutter arranged on the lower die plate, the height of the blade of the second scrap cutter is 1-2 times the thickness of the stamping material, and the cutting amount of the blade edge of the second scrap cutter and the first scrap cutter is 1-2 times the thickness of the stamping material, after the blanking assembly separates the scrap on the stamping material, the scrap cutting assembly cuts the scrap and forms a scrap segment, and the opposite side of the blade edge of the second scrap cutter has a work space for the scrap segment to slide out, during the forming work, by the relative work of the upper die plate and the lower die plate, the scrap is cut by the blanking assembly, and the separated scrap is cut again to form dispersed scrap segments by the linkage work of the first scrap cutter and the second scrap cutter, during the cutting of the scrap, the end of the scrap segment smoothly slides out from the blade edge of the second scrap cutter to the work space after being cut, when the scrap pops out of the blade edge of the second scrap cutter after deformation during the cutting of the scrap, the scrap is effectively prevented from being hung on the back of the second scrap cutter, the scrap is prevented from being stuck, the work smoothness is improved, manual continuous attendance and intervention are avoided, and the production work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 The schematic diagram of the scrap cutting by the forming die provided in the embodiments of the application;

[0026] Figure 2 The partial schematic diagram of the second scrap cutter provided in the embodiments of the application;

[0027] Figure 3 Figure 2 provides a partial side view of the upper trimming edge according to an embodiment of the present application;

[0028] Figure 4 Figure 3 provides a flow chart of a forming method according to an embodiment of the present application;

[0029] In the figure: 101, first scrap knife; 102, second scrap knife; 103, chamfer; 201, upper trimming edge; 202, lower trimming edge; 203, bevel segment; 300, scrap segment. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the application, but does not constitute a limitation of the application. The specific structural and functional details disclosed herein are only used to describe the example embodiments of the application. However, the application can be embodied in many alternative forms, and should not be understood as limited in the embodiments set forth herein.

[0031] The front roof outer panel of a vehicle is an important part of the vehicle body, which not only relates to the appearance of the vehicle, but also relates to the safety performance, NVH (noise, vibration and roughness) performance and dent resistance performance of the vehicle. The roof outer panel is a large stamping part, and its structure has an important influence on the die and material cost. In the production process, processes such as stamping, welding, painting and assembly are involved.

[0032] Generally speaking, the stamping process of the front roof outer panel of a vehicle usually includes the following:

[0033] 1. Drawing: This is the first process of stamping forming, using a drawing die to process a flat blank to form the desired shape. The drawing process is crucial to the surface quality of the outer panel, because most of the shape is determined in this process.

[0034] 2. Trimming and piercing: The parts after drawing forming need to be trimmed to cut off the excess material around the periphery, and then pierced to prepare for the subsequent flanging process. The trimming and piercing die is used for this step to remove burrs on the edges of the sheet and to remove the scrap for subsequent processes.

[0035] 3. Flanging and side flanging: This is to form the three-dimensional shape of the edges of the part, which usually needs to be completed in several processes. The first flanging and side flanging uses a special die to flange or side flange the edges of the part. Since all flanging and side flanging cannot be completed at once, a second flanging and side flanging process may be needed to complete the remaining parts.

[0036] 4. Shaping: After the flanging process, a shaping process may be needed to ensure that the final shape and size of the part meet the design requirements.

[0037] 5. Inspection and Deburring: After the stamping process is complete, the parts need to be inspected for quality, including deburring and ensuring surface quality.

[0038] 6. Cleaning and Oiling: After stamping, the parts are usually cleaned and oiled to protect them and prepare them for subsequent welding or assembly processes.

[0039] Each step requires precise mold design and process control to ensure the quality and consistency of the parts. In addition, the design of the stamping process also needs to consider factors such as the type of material, thickness, and the required final shape.

[0040] As shown in Figure 1 , Figure 2 , Figure 1 is a schematic diagram of the cutting of scrap material by the forming die provided in the embodiments of the present application, Figure 2 is a partial schematic view of the second scrap knife 102, a forming die for a front top cover outer plate, the forming die comprising an upper die plate and a lower die plate arranged oppositely, and a scrap cutting assembly arranged between the upper die plate and the lower die plate, wherein:

[0041] The upper die plate and the lower die plate are arranged oppositely and can be relatively displaced under the action of a driving mechanism, with one of the upper die plate and the lower die plate serving as a reference, and the other of the upper die plate and the lower die plate being relatively displaced to complete the stamping work of the front top cover outer plate, and a blanking assembly is arranged between the upper die plate and the lower die plate, and the blanking assembly is used to separate scrap material on the stamping material.

[0042] The scrap cutting assembly is arranged between the upper die plate and the lower die plate, and the scrap cutting assembly comprises a first scrap knife 101 arranged on the upper die plate and a second scrap knife 102 arranged on the lower die plate, the blade height of the second scrap knife 102 is 1-2 times the thickness of the stamping material, and the blade opening cutting amount of the second scrap knife 102 and the first scrap knife 101 is 1-2 times the thickness of the stamping material, after the blanking assembly separates the scrap material on the stamping material, the scrap cutting assembly cuts off the scrap material and forms a scrap segment 300, and the opposite side of the blade opening of the second scrap knife 102 has a working space for the scrap segment 300 to slide out, and the blade opening of the second scrap knife 102 forms a shear between two adjacent scrap segments 300, on the one hand, the preset blade height and blade opening cutting amount maintain stable shearing effect, on the other hand, the scrap segment 300 close to the back of the second scrap knife 102 can be smoothly discharged at the working space after being sheared, avoiding the two segments of the scrap segment 300 abutting against the two second scrap knives 102 during the sliding discharge process, and improving the smoothness of the discharge of the scrap segment 300.

[0043] As shown inFigure 1 、 Figure 2 As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided. Figure 3 , Figure 3 As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided. In an optional embodiment, the working principle of the forming die of the front top cover outer plate in the present application is as follows: the forming die comprises an upper die plate and a lower die plate arranged oppositely, and a waste cutting assembly arranged between the upper die plate and the lower die plate. A blanking assembly is arranged between the upper die plate and the lower die plate, and the blanking assembly is used to separate waste on the stamping material. The waste cutting assembly comprises a first waste cutter 101 arranged on the upper die plate and a second waste cutter 102 arranged on the lower die plate. The blade height of the second waste cutter 102 is 1-2 times the thickness of the stamping material, and the blade entry amount of the second waste cutter 102 and the first waste cutter 101 is 1-2 times the thickness of the stamping material. After the waste is separated on the stamping material by the blanking assembly, the waste cutting assembly cuts off the waste and forms a waste segment 300, and the opposite side of the blade edge of the second waste cutter 102 has a working space for the waste segment 300 to slide out. During the forming operation, the upper die plate and the lower die plate work oppositely, the waste is sheared by the blanking assembly, and the separated waste is sheared again to form the dispersed waste segment 300 by the linkage operation of the first waste cutter 101 and the second waste cutter 102. During the shearing process of the waste, the end of the waste segment 300 is smoothly slid out of the blade edge of the second waste cutter 102 to the working space after being cut off. When the waste pops out of the blade edge of the second waste cutter 102 after deformation during the cutting process, the waste is effectively prevented from hanging on the back of the second waste cutter 102, avoiding waste jamming, improving the smoothness of the operation, avoiding continuous manual supervision and intervention, and improving the production operation efficiency.

[0044] As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided. Figure 2 As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided.

[0045] As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided. Figure 1 , Figure 2 As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided. Figure 3 As shown in FIG. 1, in combination with the front top cover outer plate 100, the upper trimming edge 201 is provided.

[0046] In an optional embodiment, a spacer plate is arranged between the first scrap blade 101 and the upper die plate, and the thickness of the spacer plate is not less than the thickness of the punched material, so that the cutting amount of the first scrap blade 101 enters the back clearance space, and the edge of the scrap section 300 is moved from the blade belt of the second scrap blade 102 to the back clearance space.

[0047] By arranging the spacer plate, the relative position adjustment of the first scrap blade 101 on the basic die can be achieved, and thus the cutting amount of the first scrap blade 101 can reach the target position without reprocessing the first scrap blade 101, so that the cut of the scrap section 300 can be smoothly separated from the first scrap blade 101 and the second scrap blade 102 after the shearing is completed.

[0048] As shown in Figure 1 , Figure 2 and Figure 3 In an optional embodiment, the blanking assembly includes an upper trimming blade 201 and a lower trimming blade 202 for shearing the punched material, the upper trimming blade 201 is fixed on the upper die plate, the lower trimming blade 202 is fixed on the lower die plate, and a clearance gap is arranged between the upper trimming blade 201 and the second scrap blade 102.

[0049] The upper trimming blade 201 and the lower trimming blade 202 also synchronously displace under the relative movement of the upper die plate and the lower die plate to perform trimming, and the upper trimming blade 201 and the second scrap blade 102 are arranged in a staggered manner, and the clearance gap between the upper trimming blade 201 and the second scrap blade 102 allows the scrap to be stably sheared by the upper trimming blade 201 and the lower trimming blade 202 during operation, and the scrap can be cut by the first scrap blade 101 and the second scrap blade 102 under the further relative movement of the upper die plate and the lower die plate. The clearance gap allows the shearing of the scrap to have a certain operation gap, maintains the stability of the shearing of the scrap, effectively avoids the shearing of the scrap by the upper trimming blade 201 and the lower trimming blade 202 and the shearing of the scrap by the first scrap blade 101 and the second scrap blade 102 at the same time, and also avoids the space interference during shearing.

[0050] As shown in Figure 1 , Figure 2 and Figure 3As shown, in an optional embodiment, the upper trimming blade 201 includes multiple continuous oblique blade segments 203. The multiple oblique blade segments 203 are wavy, and the cutting edge height of the oblique blade segments 203 is a straight inclined shape of 3mm-8mm. The cutting edge length of the oblique blade segments 203 is 220mm-280mm. During the trimming operation, the waste material is arranged through the oblique blade segments 203 of the upper trimming blade 201. When cutting the waste material, the smoothness is improved while the local bounce amplitude of the waste material is reduced.

[0051] like Figure 1 As shown, in an optional embodiment, the side length of the first waste cutter 101 is greater than the cutting edge length, and the side length of the second waste cutter 102 is greater than the cutting edge length. In actual installation, the side lengths of the first waste cutter 101 and the second waste cutter 102 can both be greater than the cutting edge length by more than 10mm, so that there is a suitable space for cutting and discharge when the waste section 300 is sheared.

[0052] In an optional embodiment, multiple sets of waste cutting components are provided and are spaced apart between the upper template and the lower template. Waste guide rods are provided between adjacent waste cutting components to guide the waste section 300 to be discharged. The number and arrangement of waste cutting components can be adapted according to actual production requirements.

[0053] In an optional embodiment, the upper template is provided with a top pin device for unloading material, which increases the stroke and unloading force provided by the top pin device to assist in the unloading operation. The top pin device can be actually installed at the position that causes the greatest change in the center of gravity of the waste material, or at the position that generates the maximum rotational overturning torque of the waste material. The number of top pin devices is determined according to the allowable range of the mold structure.

[0054] like Figure 4 As shown, Figure 4 This is a schematic flowchart of the molding method provided in an embodiment of this application. Based on the same inventive concept, this application also provides a molding method for a front top cover outer panel, characterized in that the molding method uses the molding mold described above, and the molding method includes:

[0055] The stamping material is placed between the punch and die in the blanking assembly;

[0056] The upper and lower templates are driven by a drive mechanism to perform a first-stage clamping between each other, and the blanking assembly separates waste material from the stamping material.

[0057] The upper template and the lower template are further driven by the driving mechanism to perform a second-level clamping. The first waste blade 101 and the second waste blade 102 in the waste cutting assembly cut the waste and form a waste segment 300. The waste segment 300 is separated from the waste cutting assembly and discharged.

[0058] The driving mechanism drives the upper die plate and the lower die plate to separate from each other, and completes the stamping work of the front top cover outer plate.

[0059] It should be understood that the terms first, second, etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Although the terms first, second, etc. can be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit can be called the second unit, and similarly the second unit can be called the first unit, without departing from the scope of the example embodiments of the present application.

[0060] It should be understood that the term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, B alone, and A and B together. The term "and" herein describes another association relationship of the associated objects, which means that there can be two relationships, for example, A and B, which means that there are two cases of A alone and A and B together. In addition, the character " / " herein generally indicates that the associated objects before and after are an "or" relationship.

[0061] It should be understood that in the description of the present application, the terms "upper", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship of the disclosed product when it is commonly placed, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0062] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including" when used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0064] In the following description, specific details are set forth to provide a thorough understanding of example embodiments. However, persons having ordinary skill in the art will understand that the example embodiments can be practiced without the specific details. In other instances, well-known processes, structures and techniques have not been shown to avoid obscuring the subject matter of this description.

[0065] The specific embodiments described hereinabove are presented for purposes of numerical and structural examples and not for purposes of limitation. Various modifications to these embodiments can and will be implemented by persons skilled in the art that the general principles set forth herein can be implemented in alternative embodiments as will be apparent to those skilled in the art. While the application has been shown and described with reference to particular embodiments, it will be apparent to those skilled in the art that various modifications in form, detail, and ulterior application can be made to the embodiments disclosed herein, without departing from the spirit and scope of the application, that within the scope of the appended claims and their equivalents.

[0066] It is to be understood that the information disclosed in the Background section is merely for enhancing the understanding of the background of the present disclosure, and therefore can include information that is not prior art to the present application.

Claims

1. A forming die for a front header outer panel, characterized by, The forming die comprises: oppositely arranged upper and lower die plates, a blanking assembly arranged between the upper and lower die plates, the blanking assembly being used to separate waste material on the punched material; a waste material cutting assembly arranged between the upper and lower die plates, the waste material cutting assembly comprising a first waste material cutter arranged on the upper die plate and a second waste material cutter arranged on the lower die plate, the second waste material cutter having a blade height of 1-2 times the thickness of the punched material, and the second waste material cutter and the first waste material cutter having a blade cutting amount of 1-2 times the thickness of the punched material, after the blanking assembly separates the waste material on the punched material, the waste material cutting assembly cuts off the waste material and forms a waste material segment, and the second waste material cutter has a working space on the opposite side of the blade for the waste material segment to slide out.

2. The forming die for a front header outer panel according to claim 1, characterized by: The second waste material cutter is provided with a chamfer on the side away from the first waste material cutter.

3. The forming die for a front header outer panel according to claim 1, characterized by: The second waste material cutter has a blade width of 15-20 mm, and the second waste material cutter is provided with a back clearance space on the side away from the first waste material cutter.

4. The forming die for a front header outer panel according to claim 3, characterized by: A backing plate is arranged between the first waste material cutter and the upper die plate, and the thickness of the backing plate is not less than the thickness of the punched material, so that the first waste material cutter cuts into the back clearance space, and the edge of the waste material segment moves from the blade of the second waste material cutter to the back clearance space.

5. The forming die for a front header outer panel according to claim 1, characterized by: The blanking assembly comprises upper and lower trimming blades for shearing the punched material, the upper trimming blade is fixed on the upper die plate, the lower trimming blade is fixed on the lower die plate, and the upper trimming blade and the second waste material cutter are provided with a clearance gap.

6. The forming die for a front header outer panel according to claim 5, wherein: The upper trimming blade comprises a plurality of continuous inclined blade segments, the plurality of inclined blade segments are in a wave shape, the blade height of the inclined blade segment is in a straight line inclined shape of 3-8 mm, and the blade length of the inclined blade segment is 220-280 mm.

7. The forming die for a front header outer panel according to claim 1, characterized by: The first waste material cutter has a side length greater than the blade length, and the second waste material cutter has a side length greater than the blade length.

8. The forming die for a front header outer panel according to claim 1, characterized by: The waste material cutting assembly is provided with a plurality of groups and is arranged at intervals between the upper and lower die plates, and a waste material guide rod is arranged between adjacent waste material cutting assemblies to guide the waste material segment to be discharged.

9. The forming die for a front header outer panel according to claim 1, wherein: A ejector pin device for material return is arranged on the upper die plate.

10. A method of forming a front header outer panel, characterized by, The forming method is performed by using the forming die according to any one of claims 1-9, and the forming method comprises: placing the punched material between the punch and the die in the blanking assembly; driving the upper and lower die plates to be pressed against each other by the driving mechanism, the blanking assembly separates the waste material on the punched material; continuing to drive the upper and lower die plates to be pressed against each other by the driving mechanism, the first waste material cutter and the second waste material cutter in the waste material cutting assembly shear the waste material and form a waste material segment, the waste material segment is separated from the waste material cutting assembly and discharged; the driving mechanism drives the upper and lower die plates to be separated from each other, and the punching operation of the front roof panel is completed.

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