Die for forming high-strength steel plate into reducer pipe through one-time deep drawing

Abstract

The utility model belongs to the field of vehicle sheet metal part forming and manufacturing, and particularly discloses a die for forming a reducer pipe through one-time deep drawing of a high-strength steel plate, which comprises an upper part and a lower part, the upper part comprises an upper die plate, a guide sleeve, a beating rod, a beating plate, a part beating device, a base plate, a female die and a waste cutter, and the waste cutter is tightly matched and beaten into a corresponding hole in the female die. The beating rod, the beating plate and the piece beating device are sequentially installed in the female die in a sleeved mode from top to bottom, and the guide sleeve is tightly matched and beaten into a hole of the corresponding size in the upper die plate. The lower part comprises a lower die plate, a rubber plate, a discharging plate, a deep drawing male die, a blanking male die and a positioning pin, the deep drawing male die and the blanking male die are fixedly installed, the discharging plate and the rubber plate are fixedly installed, and a guide column is driven into a center hole of the lower die plate in a tight fit mode. According to the combined type die, two working procedures are synchronously completed, the problem that the die is repeatedly installed for multiple times and is repeatedly operated is solved, the two working procedures of deep drawing and blanking and edge extruding are synchronously completed, and the production efficiency of products is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the field of forming and manufacturing of vehicle sheet metal parts, and specifically discloses a die for forming a high-strength steel plate into a variable diameter pipe by one-time deep drawing, which is suitable for forming and processing vehicle sheet metal parts. Background Art

[0002] At present, with the start of the design of the scientific research prototype, the composite mold for deep drawing high-strength steel plates into reducer tubes has begun to be manufactured. Figure 1-5 The product shown is an air intake reducer for a vehicle hydraulic system, which is an important connector for the entire vehicle hydraulic system. The material is Q390 steel plate, with a thickness of 1.5mm. The reducer sizes are ф35 and ф50, 90mm in height, and there is a circle of R4 shaped grooves 8mm away from both ends of the pipe. The part is a reducer, and the preferred solution is to use steel pipe material and design a mold to complete the expansion and shrinking process performance, but this type of mold must be completed in a closed working state of the equipment, which has many restrictions. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the utility model proposes a mold for forming a reducer tube by deep drawing a high-strength steel plate at one time, comprising an upper part and a lower part, wherein the upper part comprises an upper template (1), a guide sleeve (2), a beating rod (4), a beating plate (5), a piece beater (6), a pad (8), a concave die (9) and a waste cutter (16), wherein the waste cutter (16) is tightly fitted into a corresponding hole in the concave die (9), the beating rod (4), the beating plate (5) and the piece beater (6) are sequentially installed and sleeved into the concave die (9) from top to bottom, the upper template (1), the pad (8) and the concave die (9) are fixedly installed by using a screw (3) and a pin (7), and the guide sleeve (2) is tightly fitted into a hole of a corresponding size in the upper template (1);

[0004] The lower part comprises a lower template (10), a rubber plate (12), a stripper plate (13), a drawing punch (18), a blanking punch (15) and a positioning pin (21). The drawing punch (18) and the blanking punch (15) are first fixedly installed by screws 2 (17) and pins 3 (19), and then the drawing punch (18), the blanking punch (15) and the lower template (10) are fixedly installed by screws 3 (20) and pins 2 (14). The positioning pin (21) is tightly fitted into a hole of corresponding size in the stripper plate (13), and the stripper plate (13) and the rubber plate (12) are fixedly installed by screws 4 (22). A guide pin (23) is tightly fitted into the center hole position of the lower template (10).

[0005] Furthermore, guide pillar and guide sleeve mold frames are arranged on the left and right sides of the mold, and guide sleeves (2) and guide pillars (23) are arranged between the upper mold plate (1) and the lower mold plate (10).

[0006] Furthermore, lifting screws (11) are fixedly installed at corresponding threaded holes on the sides of the upper template (1) and the lower template (10).

[0007] Furthermore, the top piece of the drawing punch (18) is formed, and the punch (6) and the drawing punch (18) are configured to be able to move up and down and exit the cavity, so that the die and the punch continue to complete the blanking and extruding process.

[0008] Furthermore, when blanking, the die is designed to the required size of the workpiece, and the punch is designed to the die size minus the clearance value. During the drawing process, the punch (6) and the drawing punch (18) are ensured to be at the blanking edge of the die, and the clearance of the punch edge is adjusted.

[0009] Furthermore, the clearance between the drawing convex and concave dies is 0.3-0.4 mm per side, and the clearance between the blanking convex and concave dies is 0.5-0.8 mm per side.

[0010] Furthermore, the die loading height of the press meets the requirements of the die closing height, and the relationship is:

[0011] H max -5≥H≥H min +10,

[0012] In the formula, H max , H min are the maximum and minimum die loading heights of the press, and H is the closing height of the mold.

[0013] Furthermore, the unloaded steel plate is fixed by the positioning pin (21) on the unloading plate (13), the upper template (1) moves downward, the punch (6) is pressed into the drawing punch (18), and the steel plate is extruded and drawn. The mold continues to move downward, the die (9) can move during the stroke of the punch (6), the mold continues to move downward, the punch (6) can move upward and push back into the working cavity, the die (9) is pressed into the stroke of the blanking punch (15), the cutting edge of the die cooperates with the cutting edge of the blanking punch (15) to blank and squeeze the edge, and under the action of the cylinder of the stamping equipment, the hitting rod (4) can support the hitting plate (5) so that the punch (6) supports the workpiece.

[0014] The utility model adopts the method of forming a semicircular arc of a steel plate into a reducer pipe and then welding the two halves together to complete the process. Therefore, only a mold for forming half of the reducer pipe needs to be designed, which greatly simplifies the difficulty of mold design and reduces the mold manufacturing cost. In order to get rid of the current backward processing method, the utility model trials and verifies the stretching performance of the reducer pipe formed by deep drawing of high-strength steel plates, ensures that one set of molds completes the production of two processes, effectively improves product production efficiency, reduces production costs, and reduces the labor intensity of operators.

[0015] The mold structure of the utility model is a composite mold that completes two processes synchronously, which solves the problem of repeated operation of multiple mold installations, realizes the synchronous completion of the two processes of drawing and blanking and extruding, and trial-produces and verifies the forming law of high-strength steel plate being drawn into a reducer tube in one time, and has the following beneficial effects:

[0016] 1. Optimize the mold structure. One set of composite mold completes the two processes of deep drawing and blanking and extrusion, which simplifies the operation process, improves product precision, and increases production efficiency by 2 times. It also tests and verifies the stretching performance of high-strength steel plate deep drawing into reducer tubes.

[0017] 2. Pay attention to the human-machine environment design, the mold is easy to use, the operation process is simplified, safe and fast, and the labor intensity of the operator is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the main view of the product structure;

[0019] Figure 2 It is a top view of the product structure;

[0020] Figure 3 This is the main view of the semi-finished product;

[0021] Figure 4 This is a bottom view of a semi-finished product;

[0022] Figure 5 This is a single piece cutting drawing;

[0023] Figure 6 This is a structural diagram of the utility model, wherein: 1. upper template, 2. guide sleeve, 3. screw one, 4. hitting rod, 5. hitting plate, 6. hitting device, 7. pin one, 8. pad, 9. die, 10. lower template, 11. lifting screw, 12. rubber plate, 13. unloading plate, 14. pin two, 15. blanking punch, 16. waste cutter, 17. screw two, 18. drawing punch, 19. pin three, 20. screw three, 21. stop pin, 22. screw four, 23. guide column. DETAILED DESCRIPTION

[0024] In order to better understand the purpose, technical solution and function of the utility model, the following Figure 1-6 , the utility model is further described in detail, but the utility model can be implemented in a variety of different ways as defined and covered by the claims. The drawings constituting a part of this application are used to provide a further understanding of the utility model, and the illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model.

[0025] The composite die of the utility model can complete several processes such as blanking, punching and drawing in one stroke of the press. In the process of completing these processes, the material of the punching part does not need to be fed and moved. The composite die has the following main features: the punching part has high precision and is not affected by the feeding error. The relative positions of the inner and outer shapes of each part are consistent. The surface of the punching part is relatively flat. It is suitable for punching thin materials, and is also suitable for punching brittle or soft materials. It can make full use of short materials and leftover corners. The die area is small.

[0026] 1. Calculate the relevant forces

[0027] The mold design of this utility model requires the calculation of relevant forces, mainly including drawing force, blanking force and unloading force. Among them, the drawing force is calculated as follows:

[0028] F 拉 =1.1πtδ b (dD),

[0029] Where: F 拉 is the drawing force (N), t is the material thickness (mm), δ b is the tensile strength (kgf / mm 2 ), t = 3, by checking the material manual, we get δ b =390kgf / mm 2 Calculated: F 拉 =1.1πtδ b (dD)=1.1×3.14×1.5×390×0.04=80N.

[0030] The blanking force is calculated as follows:

[0031] F 落 =1.3πDtδ b ,

[0032] In the formula, F 落 is the blanking force (N), t is the material thickness (mm), δ b is the tensile strength (kgf / mm 2 ), t = 3, by looking up the material manual, we get δ b =390kgf / mm 2 Calculated: F 落 =1.3πtδ b =1.3×3.14×1.5×0.09×390=215N.

[0033] The unloading force is calculated as follows:

[0034] F 卸 =K 卸 F 落 ,

[0035] In the formula, K卸 =0.04, calculated as: F 卸 =0.04×215=8.6N.

[0036] Furthermore, F 总 =F 落 +F 拉 +F 卸 =303.6N.

[0037] It can be seen that the size of the analyzed part is not large, the drawing diameter height is relatively large, and the drawing force is not large, so the drawing process can be completed with one drawing die. Using PRO / E 3D modeling and ANSYS / LS-DYNA software, the PRO / E geometric model is directly imported into ANSYS for finite element analysis to analyze the changing law of deep drawing.

[0038] 2. Equipment determination

[0039] The selection of equipment directly affects a series of issues such as the effect of composite molds on finished products, safety, product quality, mold service life, production efficiency and manufacturing cost.

[0040] The important parameters to be considered for the press are: the allowable load of the press; the pressure required to complete the process; the stroke and number of strokes; the maximum die loading height; the work surface size of the press should be larger than the plane size of the mold, and there should be room for fixing the mold and the accuracy of the press.

[0041] From the perspective of blanking pressure, die structure, drawing and blanking characteristics, this set of dies can be used on an ordinary press. Although the part size is not large and the die design size is not large, considering the performance of the cylinder top parts of the stamping equipment, the JA31-160A closed single-point press can be selected.

[0042] 3. Mould structure

[0043] Existing compound molds have certain problems. For example, the wall thickness between the inner and outer shapes of the male and female molds or between the inner shapes cannot be too thin, so as not to affect the mold strength and mold life. In addition, the punched parts cannot be missed, and the ejection problem needs to be solved. There are several types of ejection mechanism designs: (1) The ejector rod should enable the ejector plate to effectively eject the workpiece, but it should not be too long so that it is stressed at the lower end of the stroke. (2) The ejector device must have sufficient displacement to accommodate several workpieces. (3) The ejector device on the press only works when it is close to the upper end of the stroke. (4) In workshops with air sources, compressed air should be used as much as possible to blow parts. (5) If there is enough space on the ejector plate, a spring ejector pin should be installed to prevent the workpiece from sucking the ejector. (6) When the ejector plate cannot be equipped with a spring pin, a ventilation groove can be opened to facilitate compressed air to separate the workpiece from the ejector plate. In designing compound molds, feeding, unloading and retrieving are the main difficulties.

[0044] When designing the mold: (1) Since the drawing size is a reducer, the drawing height is inconsistent and there are ribs. Analysis shows that deformation and wrinkles will occur locally at the reduced diameter position of the steel plate during the drawing process. The shape and size of the punch must be matched with the size of the drawing punch. The matching clearance is the key to the design. (2) The blanking punch is installed in the fixed position of the drawing punch, and is installed and positioned with screws and pins to complete the blanking and extruding process with the die. (3) The design of the cutting edge size and the clearance matching relationship between the punch and die are very important and need to be carefully considered. (4) In the blanking and extruding process, due to the small trimming margin, it is difficult to complete seamless extrusion at the rib position between the die and the blanking punch. A waste cutter is added to the die to better ensure zero margin blanking. (5) The performance of the cylinder top piece of the stamping equipment is used to use the punch rod as the top piece device, which is economical and practical; the unloading device uses a high-strength rubber plate and unloading screws for common use, which is relatively easy to operate. (6) The mold uses a guide column and guide sleeve mold frame arranged on the left and right sides to maximize the mold correction effect. (7) Import the PRO / E geometric model for finite element analysis, analyze the change law of deep drawing, compensate the drawing convex and concave dies, and effectively avoid dimensional deviations caused by deep drawing.

[0045] The utility model is a die for forming a variable diameter tube by deep drawing of a high strength steel plate at one time, that is, a composite die for deep drawing, blanking and edge extrusion. The specific die structure is as follows Figure 6 It mainly consists of an upper template 1 and a lower template 10, a guide sleeve 2 and a guide column 23 are arranged between the upper template and the lower template, and the mold adopts a guide column and guide sleeve mold frame arranged on the left and right sides.

[0046] 4. Main components

[0047] Drawing punch

[0048] After the mold structure is determined, the design of the punch and die is the key to the design of the entire mold. The punch is formed by the top piece of the deep drawing punch, and the punch must be formed with it, and can also move up and down to exit the cavity, so that the die and punch can continue to complete the blanking and extrusion process.

[0049] Blanking convex and concave dies

[0050] The design of the punch and die for blanking is the key to the design of the entire mold. According to the design principle: when blanking, the die is designed to the required size of the workpiece, and the punch is designed to the size of the die minus the clearance value. The cavity size of the die design must be deep. During the drawing process, the punch must be ensured to be at the position of the die blanking cutting edge for better forming. At the same time, the punch cutting edge needs to be configured with clearance. Because the trimming margin is too small, it is difficult to complete seamless extrusion at the rib package position of the die and the blanking punch. The die design adds a waste cutter to ensure better completion of the zero-margin blanking and extrusion process.

[0051] Punch, die and gap between punch and die

[0052] The die punching clearance refers to the difference in the cutting edge size between the punch and the die. The clearance between the punch and the die during punching directly affects the quality of the product. A too large clearance will cause the product burrs to be too large; a too small clearance will cause the workpiece material to become thinner or even unable to punch down, affecting the product quality and reducing the service life of the die. Therefore, the die clearance must be reasonable. From the die structure, the theoretical clearance of the die flanging is: Z = T max +CT, where: T max is the maximum limit size of sheet thickness (mm), T is the basic size of sheet thickness (mm), and C is the coefficient (checked from the mold manufacturing manual). According to theoretical calculation, the gap between the punch and the die is 0.3-0.4mm on one side. When the die is blanked, the die is made into the required size of the workpiece, and the punch is the size of the die minus the gap value. According to theoretical calculation, the gap between the punch and the die is 0.5-0.8mm on one side.

[0053] Top piece, unloading device

[0054] Since the parts are not large in size, the drawing height is acceptable, and the material is not thick, the performance of the cylinder top parts of the stamping equipment is utilized by using a hitting rod to hit the parts, and a high-elastic rubber plate and a unloading screw are used for simultaneous unloading, which is more economical and suitable.

[0055] Guide pins, guide sleeves, screws, pins, lifting screws, driving rods, unloading screws, waste cutters, etc. are selected as standard parts according to the international standard manual and the cold punching die standard manual.

[0056] 5. Selection of materials for main components

[0057] Drawing punch, die, blanking punch materials

[0058] Since the drawing material uses special high-strength steel plate, the steel plate has high rigidity and hardness, the drawing forming performance is uncertain, and cracks are prone to occur on the forming edge. Considering the service life of the mold, the materials of the drawing punch, die, and blanking punch are all made of T10A tool steel with high hardenability, hardness, wear resistance and plasticity, small deformation and low price, which is suitable for multi-pass blanking; heat treatment hardness: 56~62HRC.

[0059] Materials for punching machine, backing plate and unloading plate

[0060] The materials of the hitting device, pad, unloading plate, hitting rod and hitting plate are all made of 45 steel with high strength, good plasticity and toughness and low cost; heat treatment hardness: 40~45HRC.

[0061] The materials of other parts of the mold are carbon structural steel Q235, which has low production cost.

[0062] 6. Processing requirements for main parts

[0063] Design requirements for drawing punches, dies, blanking punches, and punches

[0064] When assembling the die, drawing punch, blanking punch, and punch, the assembly clearance is required to be controlled between 0.1 and 0.2 mm, and the flatness is required to be within the range of 0.2 to 0.4 mm. When making various convex and concave dies, first rough mill the shape, drill and tap, and then quench to 56 to 62 HRC, then use slow wire cutting to process the shape edge, and then fine-process the working part size. After the convex and concave dies are processed by the equipment, they need to be polished and ground to ensure the finish requirements and improve product quality.

[0065] Mold assembly

[0066] The entire compound mold is divided into two parts, the upper and lower parts. The upper part consists of the upper mold plate 1, the guide sleeve 2, the hitting rod 4, the hitting plate 5, the hitting device 6, the backing plate 8, the die 9, and the waste cutter 16; first, the waste cutter 16 is tightly fitted into the corresponding hole in the die 9, and the hitting rod 4, the hitting plate 5, and the hitting device 6 are arranged according to the Figure 6 Position installation, put the above three parts together into the die 9, the upper template 1, the pad 8, and the die 9 are fixed and installed with screws 3 and pins 7, and the guide sleeve 2 is tightly fitted into the corresponding size hole in the upper template 1, and the upper part is installed. The lower part is composed of the lower template 10, the rubber plate 12, the stripper plate 13, the drawing punch 18, the blanking punch 15, the positioning pin 21, and the lifting screw 11; first fix the drawing punch 18 and the blanking punch 15 with screws 17 and pins 19, and then fix them with screws 20 and pins 14 with the lower template 10, and the positioning pin 21 is tightly fitted into the corresponding size hole in the stripper plate 13, according to Figure 6 In the lower part, the unloading plate 13 and the rubber plate 12 are fixed with screws 22, and the guide column 23 is tightly fitted into the center hole of the lower template 10. Finally, the lifting screws 11 are fixed to the corresponding threaded holes on the sides of the upper template 1 and the lower template 10, and the mold is installed.

[0067] 7. Closing height of mold

[0068] The mold closing height refers to the distance between the upper and lower mold bases when the mold is in the lowest working position. It should also be adapted to the mold loading height of the press.

[0069] The die height of a press refers to the distance between the ground of the slide and the plane on the worktable when the slide is at the bottom dead center. Generally, the connecting rod in the slide of a press has a certain adjustment amount. When the connecting rod of the press is adjusted to the shortest, it is the maximum die height of the press; when the connecting rod of the press is adjusted to the longest, it is the minimum die height of the press.

[0070] The die loading height of the press must meet the requirements of the die closing height. The relationship is:

[0071] H max -5≥H≥H min+10,

[0072] In the formula, H max , H min are the maximum and minimum die loading heights of the press, and H is the closing height of the mold.

[0073] If the mold closing height is too small, a pad must be added to the workbench of the press when using it. The mold closing height must be less than the mold loading height of the selected press.

[0074] The closing height of this set of compound molds = upper mold plate + pad + concave mold + blanking punch + lower mold plate - 3-12 = 158mm.

[0075] 8. Mould installation

[0076] The workbench of the press has two platforms, upper and lower. When installing the mold, the upper mold of the mold is installed on the upper platform of the press, and the lower mold of the mold is installed on the lower platform of the press. The lower platform usually has bolt holes and installation slots, and is fixed and connected by pressing plates and bolts. The upper platform depends on the structure of the workbench of the press.

[0077] Rod connection: There is a round hole in the center of the upper table, which locks the rod connection. Usually, a pressure plate and bolts are used to tighten and fix the connection.

[0078] Pressure plate and bolt connection: There are bolt through holes and installation slots on the upper platform, which need to be tightened and fixed by pressure plates and bolts.

[0079] Dovetail groove connection: There is a T-slot on the upper platform, which needs to be connected with the dovetail groove.

[0080] This compound mold equipment uses JB21-50T press machine. The upper and lower platforms have bolt through holes and installation slots, which can be fixed and connected by pressing plates and bolts.

[0081] 9. Mould working process

[0082] At the beginning of the working stroke, the positioning pin on the unloading plate fixes the unloaded steel plate, the upper die descends, and the punch 6 is gradually pressed into the drawing punch 18 to extrude and draw the steel plate. The die continues to descend, so that the die moves completely in the stroke of the punch to complete the drawing process; the die continues to descend, the punch moves up and pushes back into the working cavity, and the die is pressed into the stroke of the blanking punch. The cutting edge of the die cooperates with the cutting edge of the blanking punch to extrude the edge of the blanking. Under the action of the cylinder of the stamping equipment, the hitting rod 4 supports the hitting plate 5 so that the punch 6 supports the workpiece, and the workpiece falls. At the same time, the edge of the single piece is cut open under the extrusion of the waste cutter, and the waste naturally leaves the punch and falls by its own weight. The unloading plate rebounds during the extrusion of the rubber plate and the working stroke of the unloading screw, so that the unloading plate pushes out excess waste and takes it out by itself, and the stamping process is completed; the composite mold completes the production of a single piece in two processes at one time and directly punches out the parts.

[0083] The mold of the utility model can achieve the following effects:

[0084] (1) Optimize the mold structure. One set of composite molds can complete the two processes of deep drawing and blanking and extrusion. This simplifies the operation process, improves product precision, and increases production efficiency by 2 times. It can trial-produce and verify the deep drawing performance of high-strength steel plates and reduce mold manufacturing costs.

[0085] (2) Pay attention to the human-machine environment design, the mold is easy to use, the operation process is simplified, safe and fast, and the labor intensity of the operator is reduced;

[0086] (3) Use finite element software to analyze and compensate for the drawing convex and concave dies, effectively avoiding dimensional deviations caused by deep drawing;

[0087] (4) In the blanking and extruding process of the mold, since the trimming margin is too small, it is difficult to complete seamless extrusion at the rib package position between the die and the punch. A waste cutter is added to the die to ensure better zero-margin blanking. The performance of the cylinder top of the stamping equipment is used to hit the parts with a rod, and a high-strength rubber plate unloading device is used to make the mold structure design compact and perfect, shortening the production and processing cycle, reducing the mold cost, ensuring the completion of mass production, and improving production efficiency.

[0088] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A die for forming a high-strength steel plate into a reducer tube by one-step deep drawing, characterized in that: The utility model comprises an upper part and a lower part, wherein the upper part comprises an upper template (1), a guide sleeve (2), a beating rod (4), a beating plate (5), a piece beating device (6), a pad (8), a concave mold (9) and a waste cutter (16); the waste cutter (16) is tightly fitted into a corresponding hole in the concave mold (9); the beating rod (4), the beating plate (5) and the piece beating device (6) are sequentially installed and sleeved into the concave mold (9) from top to bottom; the upper template (1), the pad (8) and the concave mold (9) are fixedly installed by using a screw (3) and a pin (7); the guide sleeve (2) is tightly fitted into a hole of a corresponding size in the upper template (1); The lower part comprises a lower template (10), a rubber plate (12), a stripper plate (13), a drawing punch (18), a blanking punch (15) and a positioning pin (21). The drawing punch (18) and the blanking punch (15) are first fixedly installed by screws 2 (17) and pins 3 (19), and then the drawing punch (18), the blanking punch (15) and the lower template (10) are fixedly installed by screws 3 (20) and pins 2 (14). The positioning pin (21) is tightly fitted into a hole of corresponding size in the stripper plate (13), and the stripper plate (13) and the rubber plate (12) are fixedly installed by screws 4 (22). A guide pin (23) is tightly fitted into the center hole position of the lower template (10).

2. The die for deep drawing a high-strength steel plate into a reducer according to claim 1, characterized in that: Guide pillar and guide sleeve mold frames are arranged on the left and right sides of the mold, and guide sleeves (2) and guide pillars (23) are arranged between the upper mold plate (1) and the lower mold plate (10).

3. The die for forming a reducer tube by deep drawing of a high-strength steel plate in one step according to claim 1, characterized in that: Lifting screws (11) are fixedly installed at corresponding threaded holes on the sides of the upper template (1) and the lower template (10).

4. The die for forming a reducer tube by deep drawing of a high-strength steel plate in one step according to claim 1, characterized in that: The top piece of the drawing punch (18) is formed, and the punch (6) and the drawing punch (18) are configured to be movable up and down to exit the cavity, so that the concave die and the convex die continue to complete the blanking and edge extrusion process.

5. The die for forming a reducer tube by deep drawing a high-strength steel plate in one step according to claim 1, characterized in that: During blanking, the die is designed to the required size of the workpiece, and the punch is designed to the die size minus the clearance value. During the drawing process, the punch (6) and the drawing punch (18) are ensured to be at the blanking edge of the die, and the punch edge clearance is adjusted.

6. The die for forming a reducer tube by deep drawing of a high-strength steel plate in one step according to claim 1, characterized in that: The clearance between the drawing convex and concave dies is 0.3-0.4 mm per side, and the clearance between the blanking convex and concave dies is 0.5-0.8 mm per side.

7. The die for forming a reducer tube by deep drawing of a high-strength steel plate in one step according to claim 1, characterized in that: The die loading height of the press meets the requirements of the die closing height, and the relationship is: H max -5≥H≥H min +10, In the formula, H max , H min are the maximum and minimum die loading heights of the press, and H is the closing height of the mold.

8. The die for forming a reducer tube by deep drawing a high-strength steel plate in one step according to claim 1, characterized in that: The unloaded steel plate is fixed by the positioning pin (21) on the unloading plate (13), the upper mold plate (1) moves downward, the punch (6) is pressed into the deep drawing punch (18), so that the steel plate is extruded and deep drawn, the mold continues to move downward, the die (9) can move in the stroke of the punch (6), the mold continues to move downward, the punch (6) can move upward and push back into the working cavity, the die (9) is pressed into the stroke of the blanking punch (15), the cutting edge of the die cooperates with the cutting edge of the blanking punch (15) to blank and squeeze the edge, and under the action of the cylinder of the stamping equipment, the hitting rod (4) can support the hitting plate (5) so that the punch (6) supports the workpiece.

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