Exhaust end cone stamping die

Abstract

The utility model belongs to vehicle manufacturing technical field discloses a kind of exhaust end cone stamping die, including first stamping die, first stamping die includes cutting knife, and cutting knife is used to separate into first workpiece and second workpiece by workpiece punching cutting;Second stamping die, second stamping die is used to separate by scrap edge cutting of first workpiece and second workpiece;Third stamping die third stamping die is used to cut the side of first workpiece and second workpiece;Fourth stamping die, fourth stamping die is used to punch the first workpiece;The scheme is processed by four groups of stamping die in turn, first, the cutting knife of first stamping die separates into first workpiece and second workpiece by workpiece punching cutting, then second stamping die carries out scrap edge cutting to two workpieces, subsequently, third stamping die cuts the side of two workpieces, finally, fourth stamping die is specially punched for first workpiece, and key hole position processing is completed;The utility model solves the stamping forming of exhaust end cone shell.

Description

Technical Field

[0001] This solution belongs to the field of vehicle manufacturing technology, specifically involving an exhaust end cone stamping die. Background Technology

[0002] The exhaust cone is a key component in the engine exhaust system. It is usually a conical metal component, some of which have mounting holes, flanges or welded bevels. It is mainly used to guide the direction of exhaust airflow and connect various components of the exhaust system (such as exhaust pipes and mufflers). At the same time, it undertakes the core functions of sealing airflow and reducing exhaust noise and airflow resistance. It has an important impact on engine exhaust efficiency and vehicle NVH performance.

[0003] To achieve the stamping process of the exhaust end cone, a dedicated exhaust end cone stamping die is required. This die is customized according to the specific structural parameters of the exhaust end cone (such as taper, dimensional tolerances, and characteristic structures), and mainly consists of a punch, a die, and a positioning mechanism. The die is driven by a press to apply external force to the metal sheet blank, causing the blank to undergo plastic deformation or separation, thus producing the exhaust end cone prototype and characteristic structures that meet the design requirements in one go or in stages.

[0004] As per the instruction manual Figure 1 As shown, an exhaust cone housing comprises two parts. The two separate parts 51 and 52 on the right side are formed by stamping and cutting the integral part 5 on the left. Both parts have irregular structures, including arcs, protrusions, through holes, and outwardly bulging structures. Therefore, the stamping and cutting of these parts is complex and difficult to process, requiring customized stamping dies. Utility Model Content

[0005] The purpose of this solution is to provide a stamping die for an exhaust end cone to stamp a housing for an exhaust end cone.

[0006] To achieve the above objectives, this solution provides a venting end cone stamping die, comprising: A first stamping die, the first stamping die including a cutting blade, the cutting blade being used to punch and separate a workpiece into a first workpiece and a second workpiece; The second stamping die is located at the rear end of the first stamping die and is used to cut and separate the waste edges of the first workpiece and the second workpiece. The third stamping die is located at the rear end of the second stamping die and is used to cut the sides of the first workpiece and the second workpiece. The fourth stamping die is located at the rear end of the third stamping die and is used to punch holes in the first workpiece.

[0007] The principle and effect of this scheme are as follows: (1) The workpiece is processed in steps by four sets of stamping dies connected in sequence. First, the cutting blade of the first stamping die cuts the workpiece into the first workpiece and the second workpiece, providing the basic workpiece shape for subsequent processing. Then, the second stamping die cuts the waste edges of the two workpieces to remove excess material edges and regularize the initial outline. Subsequently, the third stamping die cuts the side edges of the two workpieces to shape the side edge shape to fit the structure of the exhaust end cone shell. Finally, the fourth stamping die punches holes for the first workpiece to complete the processing of key holes. (2) This scheme uses four sets of stamping dies connected in sequence for processing. The first stamping die first cuts and separates a single workpiece into a first workpiece and a second workpiece, so that the two workpieces can enter the waste edge cutting and side processing process of the subsequent second and third stamping dies at the same time. There is no need to set up separate processing procedures for the two workpieces. This avoids the waste of raw material scraps caused by traditional single workpiece processing, and makes full use of raw materials. Furthermore, by processing the two workpieces at the same time by each die, the error caused by repeated positioning in the process connection is reduced. The original scattered multiple processing procedures are integrated into continuous operation, which greatly reduces the transfer of workpieces and shortens the overall processing cycle of a single set of exhaust end cone shells.

[0008] Furthermore, the first stamping die includes a first upper stamping die and a first lower stamping die, and the first upper stamping die and the first lower stamping die are slidably connected by guide posts. The first upper stamping die is connected to a drive source for driving the first upper stamping die to move in the direction of the first lower stamping die; the cutting blade is vertically disposed on the first upper stamping die.

[0009] The principle and effect of this solution are as follows: when the drive source drives the upper die to move downward, the cutting blade moves downward accordingly. With the help of the motion accuracy guaranteed by the guide column and the pressure provided by the drive source, the workpiece can be punched and separated stably and accurately. The structural cooperation ensures the stability of the punching process, and the guide and vertically set cutting blade improve the flatness and positional accuracy of the separation surface, providing a regular initial workpiece for subsequent processes.

[0010] Furthermore, the first upper stamping die is provided with a first stamping die head that matches the shape of the workpiece, and the cutting blade is provided on the first stamping die head. The first lower stamping die is provided with a first stamping groove that matches the shape of the workpiece. A support plate for supporting the inner side of the workpiece is provided in the first stamping groove. The support plate and the cutting blade are located on the same horizontal plane and are configured to cooperate with the cutting blade.

[0011] The principle and effect of this solution are as follows: The upper and lower stamping dies form a sliding fit through guide pillars. When the drive source moves the upper die downwards towards the lower die, the cutting blade, vertically mounted on the upper die, moves downwards synchronously with it. Under the pressure of the drive source, it cooperates with the lower die to complete the punching, thereby cutting and separating the workpiece into the first workpiece and the second workpiece. The support plate and the cutting blade are located on the same horizontal plane, which limits the cutting blade and prevents excessive cutting depth.

[0012] Furthermore, the second stamping die includes a second upper stamping die and a second lower stamping die, and the second upper stamping die and the second lower stamping die are slidably connected by guide posts. The second upper stamping die is connected to a drive source for driving the second upper stamping die to move in the direction of the second lower stamping die. The second upper stamping die is provided with a first cutting blade for cutting the waste edge of the first workpiece, and the second lower stamping die is provided with a second cutting blade for cutting the waste edge of the second workpiece.

[0013] The principle and effect of this solution are as follows: the second upper stamping die and the second lower stamping die form a sliding fit through the guide post. The drive source drives the second upper stamping die to move downward to the second lower stamping die. At the same time, the first cutting blade of the upper die and the second cutting blade of the lower die correspond to the waste edge positions of the first workpiece and the second workpiece, respectively. Under the pressure of the drive source, the waste edge is cut synchronously to remove excess material edges and regularize the workpiece contour, providing a processing basis for subsequent processes.

[0014] Furthermore, the second lower stamping die is provided with a support plate for supporting the first workpiece, and the support plate is offset from the first punching cutter; the second upper stamping die is provided with a support column for supporting the second workpiece, and the shape of the support column matches the inner wall of the second workpiece.

[0015] The principle and effect of this solution are as follows: the support plate of the second stamping die supports the first workpiece, and the offset setting with the first punching cutter can avoid interference between the cutter and the support plate during punching, so that the first workpiece is stable when the scrap edge is cut; the support column of the second stamping die can be positioned and fit against the inner wall of the second workpiece because its shape fits the inner wall of the second workpiece, so as to prevent it from shifting or deforming during the punching process.

[0016] Furthermore, the third stamping die includes a third upper stamping die and a third lower stamping die, and the third upper stamping die and the third lower stamping die are slidably connected by guide posts. The third upper stamping die is connected to a drive source for driving the third upper stamping die to move in the direction of the third lower stamping die. The third upper stamping die is provided with stamping cutters for cutting the sides of the first workpiece and the second workpiece. The number of stamping cutters is two sets, and they are symmetrically arranged along the center line of the first workpiece and the second workpiece. Each set of stamping cutters is spaced apart along the direction of the side wall of the first workpiece and the second workpiece.

[0017] The principle and effect of this solution are as follows: the third upper stamping die and the third lower stamping die form a sliding fit through the guide post. The drive source drives the upper die to move downward to the lower die. The two sets of stamping cutters are symmetrical along the center line of the first and second workpieces and are spaced apart along their side wall direction, which can adapt to the structural features of the workpiece side and enable the stamping cutter to cut both sides under the action of the driving force.

[0018] Furthermore, the third upper stamping die is provided with a third stamping groove that matches the shape of the first workpiece, and the third upper stamping die is provided with a fourth stamping groove that matches the shape of the second workpiece; the third lower stamping die is provided with a third stamping die head that matches the third stamping groove and the fourth stamping groove, and the third stamping die head is a punch that matches the shape of the first workpiece and the second workpiece.

[0019] The principle and effect of this solution are as follows: the third and fourth stamping grooves of the third stamping upper die are respectively matched with the shapes of the first and second workpieces. With the cooperation of the lower die and the third stamping die head that matches the shape of the groove and the workpiece, the two workpieces can be wrapped and positioned during stamping, so as to avoid them from shifting or deforming during the side cutting process.

[0020] Furthermore, the third stamping die is provided with a support block for supporting the first workpiece and the second workpiece.

[0021] The principle and effect of this solution are as follows: the support block forms a bottom support for the first and second workpieces, and cooperates with the stamping groove of the third upper stamping die and the stamping die head of the third lower stamping die to provide support for the workpiece during side cutting, so as to prevent it from shaking due to the force of the stamping knife, thus ensuring the accuracy of the cutting position.

[0022] Furthermore, the fourth stamping die includes a fourth upper stamping die and a fourth lower stamping die, and the fourth upper stamping die and the fourth lower stamping die are slidably connected by guide posts. The fourth upper stamping die is connected to a drive source for driving the fourth upper stamping die to move in the direction of the fourth lower stamping die. The fourth upper stamping die is provided with a punching rod for punching holes in the first workpiece.

[0023] The principle and effect of this solution are as follows: the fourth stamping upper die and the lower die are slidably connected through the guide post. The drive source drives the upper die to move downward to the lower die. The punching rod of the fourth stamping upper die moves synchronously with the upper die. Under the action of the driving force, the first workpiece is punched to form the assembly hole of the first workpiece.

[0024] Furthermore, the punching rod is vertically arranged; the fourth upper stamping die is provided with a fourth upper stamping die head that matches the shape of the first workpiece, the fourth upper stamping die head is a punch, and the fourth lower stamping die is provided with a fifth stamping groove that matches the shape of the fourth upper stamping die head, the shape of the fifth stamping groove matching the shape of the first workpiece.

[0025] The principle and effect of this solution are as follows: the punch of the fourth stamping upper die and the fifth stamping groove of the lower die respectively fit the shape of the first workpiece, so that they can tightly wrap and position the workpiece during stamping, preventing it from shifting or deforming during the punching process. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of the workpiece of this utility model; Figure 2 This is a schematic diagram of the overall structure of the first stamping die of this utility model; Figure 3 This is a schematic diagram of the structure of the first upper stamping die and the first lower stamping die of this utility model; Figure 4 This is a schematic diagram of the structure of the second stamping die of this utility model; Figure 5 This is a schematic diagram of the structure of the first stamping upper die of this utility model; Figure 6 This is a schematic diagram of the overall structure of the second stamping die of this utility model; Figure 7 This is a schematic diagram of the structure of the second upper stamping die and the second lower stamping die of this utility model; Figure 8 This is a schematic diagram of the structure of the first punching blade and the support column of this utility model; Figure 9 This is a schematic diagram of the overall structure of the third stamping die of this utility model; Figure 10 This is a schematic diagram of the structure of the third stamping upper die of this utility model; Figure 11 This is a schematic diagram of the structure of the third stamping die of this utility model; Figure 12 This is a schematic diagram of the structure of the support block of this utility model; Figure 13 This is a schematic diagram of the overall structure of the fourth stamping die of this utility model; Figure 14 This is a schematic diagram of the structure of the fourth stamping upper die of this utility model; Figure 15 This is a schematic diagram of the structure of the fourth stamping die of this utility model.

[0027] The corresponding labels in the attached drawings are named as follows: First stamping die 1, cutting blade 11, first upper stamping die 12, first stamping die head 121, first lower stamping die 13, first stamping groove 131, support plate 14, second stamping die 2, second upper stamping die 21, second lower stamping die 22, first punch cutter 23, second punch cutter 24, bearing plate 25, support column 26, third stamping die 3, third upper stamping die 31, third stamping groove 311, fourth stamping groove 312, third lower stamping die 32, third stamping die head 321, support block 322, stamping blade 33, fourth stamping die 4, fourth upper stamping die 41, fourth upper stamping die head 411, fourth lower stamping die 42, fifth stamping groove 421, punching rod 43, workpiece 5, first workpiece 51, second workpiece 52 Detailed Implementation

[0028] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Example: Please see Figures 1-15 This embodiment discloses an exhaust end cone stamping die, which is used to realize the stamping separation forming of the exhaust end cone shell. The whole is composed of a first stamping die 1, a second stamping die 2, a third stamping die 3 and a fourth stamping die 4 connected in sequence along the conveying direction of the workpiece 5, forming a continuous stamping processing flow channel, which can complete the full process processing of forming the exhaust end cone shell.

[0029] Please see Figures 1-5The first stamping die 1 includes a first upper stamping die 12 and a first lower stamping die 13 arranged vertically. A cylindrical guide post is provided at each of the four corners of both dies to provide positioning and guidance for the movement of the first upper stamping die 12 along the direction of the second lower stamping die 13. The top center of the first upper stamping die 12 is rigidly connected to a drive source via a flange. In this embodiment, the drive source is a hydraulic drive cylinder, whose output pressure can be adjusted within the range of 0-15MPa. The cylinder body of the hydraulic drive cylinder is fixed to the top of the frame (not shown) by a bracket, and the end of the piston rod is detachably connected to the flange by screws, allowing the driving force to be transmitted to the first upper stamping die 12. The bottom of the first stamping die 12 is provided with a first stamping die head 121. The outer contour of the first stamping die head 121 is completely matched with the outer surface contour of the workpiece 5, which can form a tight fit constraint on the outside of the workpiece 5 during stamping. The cutting blade 11 is vertically fixed to the central axis position of the first stamping die head 121 by countersunk screws. The length of the cutting blade 11 is adapted to the height of the first stamping die head 121 to ensure that it can completely penetrate the workpiece 5 during punching. The top of the first stamping die 13 has a first stamping groove 131. The inner contour of the first stamping groove 131 is complementary to the outer surface contour of the workpiece 5. The groove depth is 2-3 mm greater than the thickness of the workpiece 5, allowing the workpiece 5 to be fully embedded. A support plate 14 is fixed to the bottom of the first stamping groove 131 by hexagonal screws. The upper end face of the support plate 14 is at the same level as the cutting edge of the cutting blade 11, and the length of the support plate 14 is the same as the cutting edge length of the cutting blade 11, while the width is 5 mm greater than the width of the cutting blade 11. This provides stable support for the inner side of the workpiece 5 and allows for a punching fit with the cutting blade 11. When the first stamping die 12 moves downward, the cutting edge of the cutting blade 11 contacts the workpiece 5 and applies a punching force. The support plate 14 provides a reverse support force below the workpiece 5, while limiting the downward depth of the cutting blade 11 to prevent damage to the first stamping die 13 due to excessive cutting. Finally, the workpiece 5 is punched and separated into the first workpiece 51 and the second workpiece 52.

[0030] Please see Figure 1 , Figures 6-8The second stamping die 2 is located at the rear end of the first stamping die 1. It includes a second upper stamping die 21 and a second lower stamping die 22, which are arranged vertically. The two are also slidably connected by four guide pillars of the same specifications as the first stamping die 1. The top center of the second upper stamping die 21 is also connected to a hydraulic drive cylinder via a flange. This hydraulic drive cylinder is connected to the same hydraulic station as the hydraulic drive cylinder of the first stamping die 1 through a flow divider valve to achieve synchronous control of the action, ensuring that the first workpiece 51 and the second workpiece 52 can immediately enter the second stamping die 2 for processing after being output from the first stamping die 1. The bottom of the second stamping upper die 21 is detachably fixed with a first punching cutter 23 by bolts. The cutting edge shape of the first punching cutter 23 is perfectly matched with the waste edge contour of the first workpiece 51, and the cutting edge material is the same as that of the cutting blade 11. The top of the second stamping lower die 22 is fixed with a second punching cutter 24 by bolts on one side corresponding to the first punching cutter 23. The cutting edge shape of the second punching cutter 24 is complementary to the waste edge contour of the second workpiece 52, and the first punching cutter 23 and the second punching cutter 24 are offset in the vertical direction. The offset distance is the sum of the thicknesses of the first workpiece 51 and the second workpiece 52 to avoid interference when the two are punched. A support plate 25 is welded to the top of the second lower die 22 near the second cutting blade 24. The support plate 25 is made of 304 stainless steel and is 10mm thick. Its upper surface is flush with the worktable surface of the second lower die 22, and the distance between the edge of the support plate 25 and the cutting edge of the first cutting blade 23 is 8mm, achieving a staggered setting with the first cutting blade 23. This provides stable support for the bottom of the first workpiece 51, preventing the first workpiece 51 from warping during waste edge cutting, and also prevents the first cutting blade 23 from colliding with the support plate 25 when it descends. A support column 26 is threaded to the bottom of the second upper die 21 near the first cutting blade 23. Its outer contour is completely matched with the inner wall contour of the second workpiece 52, and the length of the support column 26 is 1mm less than the inner wall depth of the second workpiece 52. It can be completely inserted into the second workpiece 52 during stamping, providing support for the inner wall of the second workpiece 52 and preventing the second workpiece 52 from deforming due to force during waste edge cutting. When the hydraulic drive cylinder drives the second upper stamping die 21 to move downward to the second lower stamping die 22, the first punch cutter 23 and the second punch cutter 24 simultaneously contact the waste edges of the first workpiece 51 and the second workpiece 52, and cut off the waste edges under the action of stamping pressure.

[0031] Please see Figure 1 , Figures 9-12The third stamping die 3 is located at the rear end of the second stamping die 2. It includes a third upper stamping die 31 and a third lower stamping die 32, which are arranged vertically. The four corners of the two slidably connected by four guide pillars to guide the movement of the third upper stamping die 31 and the third lower stamping die 32. A hydraulic drive cylinder is connected to the top center of the third upper stamping die 31 via a flange. This hydraulic drive cylinder is also linked to the PLC control system and automatically adjusts the downward speed according to the workpiece conveying speed. The bottom of the third upper stamping die 31 is milled to form a third stamping groove 311 and a fourth stamping groove 312. The third stamping groove 311 is located on the left side, and its inner wall contour is complementary to the outer surface contour of the first workpiece 51. The fourth stamping groove 312 is located on the right side, symmetrically arranged with the third stamping groove 311 along the center line of the third upper stamping die 31. Its inner wall contour is complementary to the outer surface contour of the second workpiece 52. The depth of both grooves is 1.5 mm greater than the thickness of the corresponding workpiece, which can form an external enclosure constraint for the first workpiece 51 and the second workpiece 52 during stamping. The top of the third stamping die 32 is integrally formed by milling to form a third stamping die head 321. The third stamping die head 321 is a punch structure. The outer contour of its left side completely matches the inner surface contour of the third stamping groove 311 and the first workpiece 51, and the outer contour of its right side completely matches the inner surface contour of the fourth stamping groove 312 and the second workpiece 52. At the bottom of the third stamping die 31, corresponding to the outer edges of the third stamping groove 311 and the fourth stamping groove 312, two sets of stamping cutters 33 are fixed by bolts. The two sets of stamping cutters 33 are symmetrically arranged along the center line of the first workpiece 51 and the second workpiece 52. Each set of stamping cutters 33 includes three spaced blades. The spacing between adjacent blades is set according to the arc-shaped structure of the side of the first workpiece 51 and the second workpiece 52. The spacing is 15mm, 20mm and 18mm respectively, and the cutting edge shape of the blade is adapted to the preset cutting trajectory of the corresponding workpiece side. The top of the third lower die 32 is located on both sides of the third die head 321, and a support block 322 is fixed to each side by bolts. The upper surface of the support block 322 is flush with the top of the third die head 321, and the length of the support block 322 is the same as the length of the first workpiece 51 and the second workpiece 52, with a width of 20mm, which can provide support and fixation for the bottom sides of the first workpiece 51 and the second workpiece 52. When the third upper die 31 moves down to the third lower die 32 under the action of the hydraulic drive cylinder, the third stamping groove 311 and the fourth stamping groove 312 cooperate with the third die head 321 to position the first workpiece 51 and the second workpiece 52, while the support block 322 provides bottom support force to prevent the workpiece from sinking or shaking due to the stamping cutter 33.

[0032] Please see Figure 1 , Figures 13-15The fourth stamping die 4 is located at the rear end of the third stamping die 3 and is used to process the assembly hole of the first workpiece 51. It includes a fourth upper stamping die 41 and a fourth lower stamping die 42 arranged vertically. The four corners of the two are slidably connected by four guide pillars of the same specifications as the third stamping die 3. A hydraulic drive cylinder is connected to the top center of the fourth upper stamping die 41 through a flange. Its output pressure adjustment range is 0-10MPa, which is suitable for the requirements of punching processing. The bottom of the fourth upper stamping die 41 is integrally formed by milling to form a fourth upper stamping die head 411. The fourth upper stamping die head 411 is a punch structure, and its outer contour is completely matched with the inner surface contour of the first workpiece 51. The punching rod 43 is vertically fixed to the preset hole position of the fourth upper stamping die head 411 by interference fit. The punching rod 43 is set to 8 according to the design size of the assembly hole of the first workpiece 51. The top of the fourth stamping die 42 is milled to form a fifth stamping groove 421. The inner contour of the fifth stamping groove 421 is complementary to the outer surface contour of the first workpiece 51. The groove depth is 1mm greater than the thickness of the first workpiece 51. A blanking hole with a diameter of 8.5mm (not shown) is formed at the bottom of the fifth stamping groove 421 corresponding to the position of the punching rod 43. The blanking hole penetrates the fourth stamping die 42, which facilitates the timely discharge of waste generated during punching and avoids waste accumulation. When the first workpiece 51 is conveyed to the fourth stamping die 4, the fourth stamping upper die 41 moves downward to the fourth stamping lower die 42 under the action of the hydraulic drive cylinder. The fourth stamping upper die head 411 first inserts into the interior of the first workpiece 51 and cooperates with the fifth stamping groove 421 to cover and position the first workpiece 51, preventing it from shifting or deforming during the punching process. Then, the punching rod 43 continues to move downward under the action of hydraulic drive force, penetrating the first workpiece 51 and forming an assembly hole.

[0033] In this embodiment, a metal sheet workpiece 5 is used as the processing object. The exhaust end cone shell is formed by sequentially connecting the first stamping die 1, the second stamping die 2, the third stamping die 3, and the fourth stamping die 4. The specific process is as follows: The workpiece 5 of the preset size is transported to the first stamping lower die 13 of the first stamping die 1, so that the workpiece 5 is embedded in the first stamping groove 131. The support plate 14 fits against the inner side of the workpiece 5 to provide support. The drive source of the first stamping upper die 12 is started. The first stamping upper die 12 moves down along the guide post to the first stamping lower die 13. The first stamping die head 121 first fits against the outer surface of the workpiece 5 to form a constraint. Then, the cutting blade 11 punches the workpiece 5 under the pressure of the drive source. The support plate 14 cooperates to limit the cutting depth. Finally, the workpiece 5 is separated into the first workpiece 51 and the second workpiece 52. The two workpieces are transferred to the second stamping die 2 by the conveying mechanism. The first workpiece 51 is fed onto the support plate 25 of the second stamping lower die 22 (the support plate 25 is misaligned with the first punching cutter 23). The second workpiece 52 corresponds to a preset position of the second stamping lower die 22, and the support column 26 of the second stamping upper die 21 is aligned with the inner wall of the second workpiece 52. The drive source of the second stamping upper die 21 is activated, and the upper die descends along the guide column. The first punching cutter 23 and the second punching cutter 24 respectively contact the waste edges of the two workpieces, and under pressure, the excess waste edges are removed. After the contour is shaped, the two workpieces are transferred to the third stamping die 3. The first workpiece 51 and the second workpiece 52 are respectively placed at the corresponding positions of the third stamping die head 321 of the third stamping lower die 32. The third stamping die head 321 fits against the inner wall of the workpiece, and the support block 322 supports the bottom sides of the workpiece. The drive source of the third upper stamping die 31 is activated, and the upper die descends along the guide post. The third stamping groove 311 and the fourth stamping groove 312 respectively conform to the outer surfaces of the two workpieces to form a wrapping and positioning. Two sets of symmetrical stamping cutters 33 contact the sides of the workpieces and cut off the excess material under pressure. After processing, the two workpieces are transferred to the fourth stamping die 4. The first workpiece 51 is sent to the fifth stamping groove 421 of the fourth lower stamping die 42. The drive source of the fourth upper stamping die 41 is activated, and the upper die descends along the guide post. The fourth upper stamping die head 411 is inserted into the first workpiece 51 and cooperates with the fifth stamping groove 421 for positioning. Then, the vertically set punching rod 43 penetrates the first workpiece 51 under pressure to form an assembly hole. The punching waste is discharged through the blanking hole of the fourth lower stamping die 42. At this point, the first workpiece 51 has completed all the processing steps and together with the second workpiece 52, which has been processed by the previous three steps, it forms a shaped exhaust end cone shell for subsequent assembly.

[0034] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A venting end cone stamping die, characterized in that, include: The first stamping die (1) includes a cutting blade (11) for punching and separating the workpiece (5) into a first workpiece (51) and a second workpiece (52). The second stamping die (2) is located at the rear end of the first stamping die (1) and is used to cut and separate the waste edges of the first workpiece (51) and the second workpiece (52). The third stamping die (3) is located at the rear end of the second stamping die (2) and is used to cut the sides of the first workpiece (51) and the second workpiece (52). The fourth stamping die (4) is located at the rear end of the third stamping die (3) and is used to punch holes in the first workpiece (51).

2. The exhaust end cone stamping die according to claim 1, characterized in that: The first stamping die (1) includes a first upper stamping die (12) and a first lower stamping die (13), and the first upper stamping die (12) and the first lower stamping die (13) are slidably connected by guide posts. The first upper stamping die (12) is connected to a drive source for driving the first upper stamping die (12) to move in the direction of the first lower stamping die (13). The cutting blade (11) is vertically disposed on the first upper stamping die (12).

3. The exhaust end cone stamping die according to claim 2, characterized in that: The first stamping upper die (12) is provided with a first stamping die head (121) that matches the shape of the workpiece (5). The cutting blade (11) is provided on the first stamping die head (121). The first stamping lower die (13) is provided with a first stamping groove (131) that matches the shape of the workpiece (5). The first stamping groove (131) is provided with a support plate (14) for supporting the inner side of the workpiece (5). The support plate (14) and the cutting blade (11) are located on the same horizontal plane and are configured to cooperate with the cutting blade (11).

4. The exhaust end cone stamping die according to claim 1, characterized in that: The second stamping die (2) includes a second upper stamping die (21) and a second lower stamping die (22), and the second upper stamping die (21) and the second lower stamping die (22) are slidably connected by guide posts. The second upper stamping die (21) is connected to a drive source for driving the second upper stamping die (21) to move in the direction of the second lower stamping die (22). The second upper stamping die (21) is provided with a first cutting blade (23) for cutting the waste edge of the first workpiece (51), and the second lower stamping die (22) is provided with a second cutting blade (24) for cutting the waste edge of the second workpiece (52).

5. The exhaust end cone stamping die according to claim 4, characterized in that: The second stamping lower die (22) is provided with a support plate (25) for supporting the first workpiece (51), and the support plate (25) is offset from the first punching cutter (23); the second stamping upper die (21) is provided with a support column (26) for supporting the second workpiece (52), and the shape of the support column (26) matches the inner wall of the second workpiece (52).

6. The exhaust end cone stamping die according to claim 1, characterized in that: The third stamping die (3) includes a third upper stamping die (31) and a third lower stamping die (32), and the third upper stamping die (31) and the third lower stamping die (32) are slidably connected by guide posts. The third upper stamping die (31) is connected to a drive source for driving the third upper stamping die (31) to move towards the third lower stamping die (32). The third upper stamping die (31) is provided with stamping cutters (33) for cutting the sides of the first workpiece (51) and the second workpiece (52). The number of stamping cutters (33) is two sets, and they are symmetrically arranged along the center line of the first workpiece (51) and the second workpiece (52). Each set of stamping cutters (33) is spaced apart along the side wall of the first workpiece (51) and the second workpiece (52).

7. The exhaust end cone stamping die according to claim 6, characterized in that: The third upper stamping die (31) is provided with a third stamping groove (311) that matches the shape of the first workpiece (51), and the third upper stamping die (31) is provided with a fourth stamping groove (312) that matches the shape of the second workpiece (52); the third lower stamping die (32) is provided with a third stamping die head (321) that matches the third stamping groove (311) and the fourth stamping groove (312), and the third stamping die head (321) is a punch that matches the shape of the first workpiece (51) and the second workpiece (52).

8. The exhaust end cone stamping die according to claim 6, characterized in that: The third stamping die (32) is provided with a support block (322) for supporting the first workpiece (51) and the second workpiece (52).

9. The exhaust end cone stamping die according to claim 1, characterized in that: The fourth stamping die (4) includes a fourth upper stamping die (41) and a fourth lower stamping die (42), and the fourth upper stamping die (41) and the fourth lower stamping die (42) are slidably connected by guide posts. The fourth upper stamping die (41) is connected to a drive source for driving the fourth upper stamping die (41) to move in the direction of the fourth lower stamping die (42). The fourth upper stamping die (41) is provided with a punching rod (43) for punching holes in the first workpiece (51).

10. A venting end cone stamping die according to claim 9, characterized in that: The punching rod (43) is vertically arranged; the fourth upper stamping die (41) is provided with a fourth upper stamping die head (411) that matches the shape of the first workpiece (51), the fourth upper stamping die head (411) is a punch, the fourth lower stamping die (42) is provided with a fifth stamping groove (421) that matches the shape of the fourth upper stamping die head (411), and the shape of the fifth stamping groove (421) matches the shape of the first workpiece (51).

Images