A semi-cut stamping die and stamping method for processing a reverse boss deep drawing part

Abstract

The application provides a half-cut type stamping die for processing reverse boss deep drawing parts, comprising an upper die and a lower die, the upper die is provided with an upper die punch and an upper die forming part, a stamping blade is arranged on the outer edge of the lower end of the upper die punch, the upper die forming part is connected to the center area of the lower end surface of the upper die punch, and the stamping blade is arranged around the upper die forming part; the application aims to provide a half-cut type stamping die for processing reverse boss deep drawing parts and a stamping method, so that deep drawing and half cutting are simultaneously performed, the process can not only meet the deep drawing demand and support continuous stamping, but also reduces the stamping and cutting steps and improves the production efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of stamping die, in particular to a half-cut stamping die and stamping method for processing reverse boss deep drawing parts. BACKGROUND

[0002] Stamping is a forming process that uses a press and a die to apply an external force to sheet metal, strip, pipe and profiled material, etc. to make it produce plastic deformation or separation, thereby obtaining the required shape and size of the workpiece. The forming process in stamping includes bending, deep drawing, bulging and hole expansion, etc. The common types of deep drawing process are cylindrical part deep drawing and stepped part deep drawing. Among them, for the cylinder drawing, the general deep drawing process of the deep drawing product is: first deep drawing, then cutting off the connection between the product and the material belt, adding a punching step, which affects the production rate. SUMMARY

[0003] Therefore, the present application aims to provide a half-cut stamping die and stamping method for processing reverse boss deep drawing parts, which can ensure that the process meets the deep drawing requirements, supports continuous stamping, reduces the punching step, and improves the production efficiency.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A half-cut stamping die for processing reverse boss deep drawing parts, comprising an upper die and a lower die, the upper die is provided with an upper die punch and an upper die forming part, the lower end outer edge of the upper die punch is provided with a stamping blade; the center area of the lower end face of the upper die punch is connected with the upper die forming part, and the stamping blade is arranged around the upper die forming part;

[0006] The lower die is provided with a stretching die and a lower die forming part, the upper edge of the stretching die is provided with a guide surface, the guide surface is a curved surface, and the guide surface is correspondingly arranged with the stamping blade; the stretching channel is formed in the stretching die, the upper die forming part can be punched into the stretching channel from above; the lower die forming part is fitted in the stretching channel, and the side wall of the lower die forming part and the inner wall of the stretching channel form a sliding fit; the lower die forming part is connected with a nitrogen gas spring through a force transmission rod;

[0007] The outer side of the stretching die is provided with a side punch mechanism, the side punch mechanism comprises a supporting knife, an inserting knife and a side punch; the upper end of the inserting knife is connected with the upper die, the lower part of the inserting knife is abutted on the supporting knife, and the lower end of the inserting knife is matched with the rear end of the side punch through a guide sliding surface; the blanking channel is formed on the lower die, and the blanking channel is correspondingly arranged with the stretching channel.

[0008] Further, the stamping blade is composed of a guide pushing surface and a guide surface, the guide pushing surface is arranged along the horizontal direction, and the included angle between the guide pushing surface and the guide surface is 90°.

[0009] Further, the upper die forming part bottom surface is provided with an upper die cavity, and the lower die forming part top surface is provided with a lower die cavity, and the upper die cavity and the lower die cavity form a reverse boss cavity.

[0010] Further, the side punch front end is a side punch surface, the side punch surface is an arc surface, and the arc surface is consistent with the arc of the guide surface.

[0011] Further, the upper die comprises an upper cover plate, an upper die seat, an upper backing plate, an upper clamping plate, a stop plate and a stripping plate arranged in sequence from top to bottom, and the upper die punch top is connected with the upper die seat through screws.

[0012] Further, the lower die comprises a lower backing plate, a lower foot, a lower die seat, a lower back plate, a lower backing plate and a lower die plate arranged in sequence from bottom to top, the lower foot is arranged on the lower backing plate, the lower die seat is arranged on the lower foot, the transmission rod is located on both sides of the stretching channel, and the nitrogen gas spring is arranged on the lower backing plate.

[0013] The application also provides a half-cut type stamping method for processing a reverse boss drawn part, using the half-cut type stamping die for processing the reverse boss drawn part.

[0014] S1, the upper die is downwardly stamped to a first stamping position, the upper die punch drives the upper die forming part to be stamped into the stretching channel of the stretching die, preliminary product stretching is performed, the stamping blade of the upper die punch is driven to half-cut the product mouth, and the stretching channel of the stretching die is used for shaping the cut product mouth.

[0015] S2, the lower end guide sliding surface of the insert drives the side punch to laterally stamp the workpiece, and the product side wall is grooved.

[0016] S3, the upper die continues to be downwardly stamped to a second stamping position, in the process of downward stamping of the upper die, the stamping blade of the upper die punch is driven to cut the product mouth, the stretching channel of the stretching die is used for shaping the cut product mouth, the upper die punch drives the upper die forming part to be stamped deeply into the stretching channel, and product stretching is completed.

[0017] S4, the upper die continues to be downwardly stamped to a third stamping position, the nitrogen gas spring retracts the transmission rod, and the workpiece is discharged downwardly from the stretching channel.

[0018] Compared with the prior art, the half-cut type stamping die and the stamping method for processing the reverse boss drawn part have the following advantages.

[0019] (1) The stamping die can realize synchronous stretching of the product and half-cutting of the product mouth, thereby reducing the cutting step and improving the production rate, can support the product side wall to be grooved with exhaust grooves, and can be used for forming the reverse boss.

[0020] (2) The stamping method utilizes the stamping die, and one stamping station can complete product drawing, half-cut product mouth, product sidewall slotting, cutting and trimming, and blanking, wherein the drawing process is simultaneously performed with the half-cut product mouth, so that the workpiece drawing demand is met, the punching and cutting steps are reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the application. The illustrative embodiments of the present application and its description serve to explain the application. It is not intended to limit the application. In the drawings:

[0022] Figure 1 The stamping die overall structure schematic view described in the embodiment of the present application;

[0023] Figure 2 The reverse boss cavity structure schematic view described in the embodiment of the present application;

[0024] Figure 3 The Figure 1 The local enlarged view of position A;

[0025] Figure 4 The side punch mechanism structure schematic view described in the embodiment of the present application;

[0026] Figure 5 The blanking channel and its connecting structure schematic view described in the embodiment of the present application;

[0027] Figure 6 The product structure view described in the embodiment of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1-upper cover plate; 2-upper die base; 3-upper backing plate; 4-upper clamping plate; 5-stop plate; 6-removing plate; 7-lower die plate; 8-lower backing plate; 9-lower back plate; 10-lower die base; 11-lower backing foot; 12-lower supporting plate; 13-nitrogen gas spring; 14-upper die punch; 15-inserting knife; 16-upper die forming piece; 17-relying knife; 18-side punch; 19-drawing concave die; 20-lower die forming piece; 21-force transmission rod; 23-upper die cavity; 24-drawing channel; 25-lower die cavity; 30-stamped workpiece; 31-pushing guide surface; 32-stamping blade; 33-guiding surface; 34-guiding surface; 35-sliding guide surface; 36-side punch surface; 40-blanking channel; 41-stamped workpiece; 43-exhaust groove; 44-reverse boss. DETAILED DESCRIPTION

[0030] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0031] As Figures 1 to 4As shown, a kind of half-cut type stamping die of reverse boss deep drawing part, including upper die and lower die, the upper die is provided with upper die punch 14 and upper die forming piece 16, the lower end outer edge of the upper die punch 14 is equipped with stamping blade 32;The center area of the lower end surface of the upper die punch 14 is connected with the upper die forming piece 16, and the stamping blade 32 is arranged around the upper die forming piece 16;

[0032] The lower die is provided with a drawing concave die 19 and a lower die forming piece 20, the upper edge of the drawing concave die 19 is provided with a guide surface 34, the guide surface 34 is a curved surface, and the guide surface 34 is correspondingly arranged with the stamping blade 32;The drawing channel 24 is formed in the drawing concave die 19, and the upper die forming piece 16 can be stamped into the drawing channel 24 from above;The lower die forming piece 20 is fitted in the drawing channel 24, and the side wall of the lower die forming piece 20 is in sliding fit with the inner wall of the drawing channel 24;The lower die forming piece 20 is connected with the nitrogen gas spring 13 through the force transmission rod 21;Wherein, the nitrogen gas spring 13 is an industrial accessory that can support, buffer, brake, height adjustment and angle adjustment.

[0033] The outer side of the drawing concave die 19 is provided with a side punch mechanism, which includes a backing knife 17, an insert knife 15 and a side punch 18;The upper end of the insert knife 15 is connected with the upper die, the lower outer side of the insert knife 15 abuts against the backing knife 17, and the lower end of the insert knife 15 is matched with the rear end of the side punch 18 through the guide sliding surface 35;The blanking channel 40 is opened on the lower die, and the blanking channel 40 is correspondingly arranged with the drawing channel 24.

[0034] As shown, Figure 6 In this embodiment, the deep drawing of cylindrical part is taken as an example, the drawing height is 26mm, the product inner bottom has reverse boss 44, and the product side wall has exhaust groove 43.The working principle of the half-cut type stamping die of reverse boss deep drawing part in this embodiment is that one stamping station can stretch the product, half-cut the product mouth, punch the groove on the product side wall, cut off and trim the edge and blank, wherein the product stretching and half-cutting the product mouth are carried out synchronously, the stamping plate is placed on the drawing concave die 19, the upper die is downwardly stamped, the stamping blade 32 of the upper die punch 14 is driven to half-cut the product mouth;At the same time, the upper die punch 14 drives the upper die forming piece 16 to stamp into the drawing channel 24 of the drawing concave die 19 to carry out preliminary product stretching;The product stretching and half-cutting the product mouth are realized simultaneously;

[0035] When the upper die is downwardly stamped to the state that the half-stamping blade 32 is in the half-cut product mouth, the stamping blade half-cuts into the product mouth, which can clamp the product mouth, at the same time, the upper die forming piece 16, the lower die forming piece 20 and the drawing concave die 19 position the product, the side punch mechanism punches the groove on the product side wall, the lower end guide sliding surface of the insert knife 15 drives the side punch 18 to laterally stamp the workpiece, and the product side wall is punched with exhaust groove 43;

[0036] The upper die continues to press downwards to the second pressing position, driving the pressing blade 32 of the upper die punch 14 to cut off the product opening. The cut-off product opening is then shaped and trimmed through the stretching channel 24 of the stretching die 19. At the same time, the upper die punch 14 drives the upper die forming part 16 to press deeper into the stretching channel 24, completing the product drawing height of 26mm and completing the product drawing. During unloading, the nitrogen spring 13 retracts the force transmission rod 21, and the workpiece falls from the stretching channel 24 and is unloaded downwards through the unloading channel 40 opened on the lower die.

[0037] like Figure 3 As shown, the stamping blade 32 is composed of a push surface 31 and a guide surface 33. The push surface 31 is arranged in a horizontal direction, and the included angle between the push surface 31 and the guide surface 33 is 90°. With this structure, the stamping blade 32 can partially shear the product opening, that is, the stamping blade partially cuts into the product opening without completely cutting off the product. It can hold the product and work with the upper die forming part 16, the lower die forming part 20 and the stretching die 19 to position the product accurately.

[0038] like Figure 2 and Figure 6 As shown, the upper mold forming part 16 has an upper mold cavity 23 on its bottom surface, and the lower mold forming part 20 has a lower mold cavity 25 on its top surface. The upper mold cavity 23 and the lower mold cavity 25 form a reverse boss cavity. Using this structure, the reverse boss is formed through the upper mold cavity 23 and the lower mold cavity 25, enabling the forming of the reverse boss 44 on the workpiece. Furthermore, the reverse boss 44 is formed during the shaping and trimming of the cut-off part of the product through the stretching channel 24 of the stretching die 19. This further reduces the number of stamping steps.

[0039] like Figure 4 As shown, the front end of the side punch 18 is a side punch surface 36, which is an arc-shaped surface, and this arc-shaped surface is consistent with the arc shape of the guide surface 34. With the above structure, the arc-shaped guide surface can be used to trim the opening of the product when it is stamped into the stretching groove.

[0040] like Figure 1 As shown, the upper die includes, from top to bottom, an upper cover plate 1, an upper die base 2, an upper pad plate 3, an upper clamping plate 4, a stop plate 5, and a stripper plate 6; the top of the upper die punch 14 is connected to the upper die base 2 by screws. The lower die includes, from bottom to top, a lower support plate 12, lower pads 11, a lower die base 10, a lower back plate 9, a lower pad plate 8, and a lower template 7; the lower support plate 12 is provided with lower pads 11, and the lower die base 10 is supported on the lower pads 11; the force transmission rod 21 is located on both sides of the tension channel 24, and the nitrogen spring 13 is provided on the lower support plate 12. The structure is compact, reducing the footprint.

[0041] A kind of half-cut trimming stamping method with reverse boss deep drawing piece, using the half-cut stamping die of processing reverse boss deep drawing piece described above, comprising the following steps:

[0042] S1, the upper die is punched downwards to first stamping position, the upper die punch 14 is driven into the drawing channel 24 of drawing die 19 by upper die forming piece 16, preliminary product drawing is carried out;The stamping blade 32 of upper die punch 14 is driven, and the mouth of the product is half-cut;

[0043] S2, the lower end guide surface of insert 15 drives side punch 18 to laterally punch workpiece, and the side wall of product is grooved;

[0044] S3, the upper die continues to be punched downwards to second stamping position, in the process of the upper die being punched downwards, the stamping blade 32 of upper die punch 14 is driven to cut the mouth of the product, and the cut mouth of the product is shaped through the drawing channel 24 of drawing die 19;At the same time, the upper die punch 14 is driven to punch deeply into the drawing channel 24 by upper die forming piece 16, and product drawing is completed;

[0045] S4, the upper die continues to be punched downwards to third stamping position, nitrogen spring 13 retracts transmission rod 21, and the workpiece is discharged downward from the drawing channel 24.

[0046] A kind of half-cut stamping die and stamping method for processing reverse boss deep drawing piece, can realize continuous stamping, one stamping station can complete drawing product, half-cut product mouth, product side wall grooving, cutting trimming and discharging;Wherein, deep drawing process is carried out simultaneously with half-cut, not only can meet the drawing demand of workpiece, also reduces the punching step, improves production efficiency.

[0047] The above only for the preferred embodiment of the present application, and not to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A half-cut press tool for processing a reverse dome drawn part, comprising an upper die and a lower die, characterized in that: The upper die sets an upper die punch (14) and an upper die forming piece (16), the lower end of the upper die punch (14) is provided with a stamping blade (32), and the lower end surface of the upper die punch (14) is connected with the upper die forming piece (16) in the central area; the stamping blade (32) is arranged around the upper die forming piece (16); The lower die sets a drawing concave die (19) and a lower die forming piece (20), the upper edge of the drawing concave die (19) is provided with a guide surface (34), the guide surface (34) is a curved surface, and the guide surface (34) is correspondingly arranged with the stamping blade (32); the drawing concave die (19) is internally formed with a drawing channel (24), the upper die forming piece (16) can be stamped into the drawing channel (24) from above; the lower die forming piece (20) is fitted in the drawing channel (24), and the side wall of the lower die forming piece (20) and the inner wall of the drawing channel (24) form a sliding fit; the lower die forming piece (20) is connected with a nitrogen spring (13) through a force transmission rod (21); The drawing concave die (19) is provided with a side punch mechanism on the outside, the side punch mechanism includes a backing cutter (17), an insert cutter (15) and a side punch (18); the upper end of the insert cutter (15) is connected with the upper die, the lower part of the insert cutter (15) is abutted against the backing cutter (17) on the outside, and the lower end of the insert cutter (15) is matched with the rear end of the side punch (18) through a guide sliding surface (35); the lower die is provided with a blanking channel (40), and the blanking channel (40) is correspondingly arranged with the drawing channel (24).

2. The split-die press tool for processing a reverse dome drawn part according to claim 1, characterized in that: The stamping blade (32) is composed of a guide pushing surface (31) and a guide surface (33), the guide pushing surface (31) is arranged in the horizontal direction, and the included angle between the guide pushing surface (31) and the guide surface (33) is 90°.

3. The split die for processing a reverse dome drawn part of claim 1, wherein: The bottom surface of the upper die forming piece (16) is provided with an upper die cavity (23), the top surface of the lower die forming piece (20) is provided with a lower die cavity (25), and the upper die cavity (23) and the lower die cavity (25) form a reverse boss cavity.

4. The split die for processing a reverse dome drawn part of claim 1, wherein: The front end of the side punch (18) is a side punch surface (36), the side punch surface (36) is an arc surface, and the arc surface is consistent with the arc of the guide surface (34).

5. The split die for processing a reverse dome drawn part of claim 1, wherein: The upper die includes an upper cover plate (1), an upper die seat (2), an upper pad plate (3), an upper clamp plate (4), a stop plate (5) and a stripping plate (6) arranged in sequence from top to bottom; the top of the upper die punch (14) is connected with the upper die seat (2) through screws.

6. The split die for processing a reverse dome drawn part of claim 1, wherein: The lower die includes a lower supporting plate (12), a lower pad foot (11), a lower die seat (10), a lower back plate (9), a lower pad plate (8) and a lower die plate (7) arranged in sequence from bottom to top; the lower pad foot (11) is arranged on the upper supporting plate (12), the lower die seat (10) is arranged on the lower pad foot (11), the force transmission rod (21) is located directly below the drawing channel (24), and the nitrogen spring (13) is arranged on the lower supporting plate (12).

7. A method of half-cut press forming of a reverse dome drawn part, characterized by: The semi-cut type stamping die for processing reverse boss drawn parts according to any one of claims 1 to 6 comprises the following steps: S1, the upper die is punched downward to the first punching position, the upper die punch (14) drives the upper die forming part (16) to punch into the stretching channel (24) of the stretching die (19) to perform preliminary product stretching; the punching blade (32) of the upper die punch (14) drives the half-cut product mouth; S2, the lower end guide sliding surface of the insert knife (15) drives the side punch (18) to laterally punch the workpiece to groove the product side wall; S3, the upper die continues to be punched downward to the second punching position, in the process of the downward punching of the upper die, the punching blade (32) of the upper die punch (14) cuts off the product mouth, the cut-off product mouth is shaped through the stretching channel (24) of the stretching die (19); at the same time, the upper die punch (14) drives the upper die forming part (16) to punch deeply into the stretching channel (24) to complete product stretching; S4, the upper die continues to be punched downward to the third punching position, the nitrogen gas spring (13) retracts the transmission rod (21), and the workpiece falls downward from the stretching channel (24).

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