Die for continuous upward punching in heat shield production

Abstract

The utility model discloses a die for continuous upward punching in heat shield production. The die comprises an upper die structure and a lower die structure. The die is characterized in that the upper die structure comprises an upper clamping plate and an upper base plate, a blowing hole is formed in the upper base plate and communicated with a blowing pipe, and the blowing pipe is connected with a high-pressure air source; a steel hole is formed in the containing cavity of the upper clamping plate, a forming hole and a discharging hole are formed in the steel hole, and the discharging hole is communicated with the blowing hole. The lower die structure comprises a lower clamping plate and a lower cushion plate. A stripping back plate and a stripping plate are sequentially arranged above the lower clamping plate; punches are mounted in the mounting holes of the lower clamping plate, the stripper plate and the stripper plate; the punches are matched with the discharging holes and correspond to the discharging holes in position; the die is simple in structure and easy to machine, meets the requirements of different fracture faces and burr faces of products, can finish machining in a continuous die at a time, improves product quality, guarantees machining precision, and is low in cost and high in production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of cold stamping dies, in particular to a die for continuous upward punching in the production of heat insulation covers. Background Art

[0002] Stamping dies are a commonly used metal processing equipment. The metal sheet is placed in the die of the die, and the impact force of the punch acts on the metal sheet to cause plastic deformation, thereby achieving the desired shape and size. There are many ways to classify stamping dies. According to their uses, they can be divided into drawing dies, forming dies, punching dies and other punching dies; with the improvement of the installation and use performance of the engine heat shield, the processing performance requirements of the die are also improved.

[0003] At present, conventional continuous dies for stamping engine heat shields are punched vertically downward, with the burr surface at the bottom, and the punched waste beans fall downward due to gravity; there are two unchangeable factors in the punching die: ① The relative position accuracy of punching multiple holes in multiple steps is lower than that of punching multiple holes in one step; ② The fracture surface and burr surface of punching in the same direction are in the same direction; the direction of the fracture surface and burr surface affects the functionality of the heat shield. For different holes in the same plane, the fracture surface and burr surface are required to be in different directions and the relative position accuracy of the holes is higher. The existing mold process is divided into two punchings to meet the requirements of different directions of the fracture surface and burr surface. After the heat shield is partially punched in the continuous die, it is punched with a single-process die; This results in low production efficiency, reduced product accuracy, increased scrap rate and increased costs. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the above-mentioned prior art and provide a die for continuous upward punching in the production of heat insulation covers.

[0005] The technical solution provided by the utility model is: a mold for continuous upward punching in the production of heat insulation covers, comprising an upper mold structure and a lower mold structure; the special feature is that the upper mold structure comprises an upper clamping plate, an upper pad is arranged above the upper clamping plate, a blowing hole is arranged inside the upper pad, one end of the blowing hole is communicated with a blowing pipe, and the blowing pipe is connected to a high-pressure air source; a steel eye is arranged in the accommodating cavity of the upper clamping plate, and the two are interference fit; a forming hole and a discharge hole are arranged on the steel eye, and the two are communicated, and the discharge hole is communicated with the blowing hole; the discharge hole is a waste bean discharge channel;

[0006] The lower die structure includes a lower clamping plate, under which a lower pad is arranged; a stripping plate and a stripping plate are arranged above the lower clamping plate in sequence; a first punch mounting hole is arranged on the lower clamping plate, a second punch mounting hole is arranged on the stripping plate, a mounting hole is arranged on the stripping plate, the stripping block is interference fit in the stripping plate mounting hole, and a third punch mounting hole is arranged on the stripping block; the size of the second punch mounting hole is larger than that of the third punch mounting hole; punches are arranged in the first punch mounting hole, the second punch mounting hole and the third punch mounting hole; the punches match the discharge holes and their positions correspond.

[0007] Furthermore, the stripping block cooperates with the steel eye to position and fix the heat insulation cover between the stripping block and the steel eye.

[0008] Beneficial effects of the utility model:

[0009] 1. The upward punching process is adopted. The punch and the support plate are set on the lower die, and the steel eye is set on the upper die. After punching, the fracture surface and burr surface are on the top, which meets the requirements that the fracture surface and burr surface of the continuous die processing product are both upward and downward, solving the limitation of the single downward punching process;

[0010] 2. A waste bean discharge channel is set in the upper clamping plate. The forming hole on the steel eye is connected to the discharge hole, the discharge hole is connected to the blowing hole, one end of the blowing hole is connected to the blowing pipe, and the blowing pipe is connected to the high-pressure gas source; according to the principle of Bernoulli's law, the gas from the blowing pipe blows high-pressure air to the blowing hole. As the blowing flow rate increases, the pressure in the blowing hole is lower than the pressure in the discharge hole. The negative pressure principle makes the waste beans rise into the blowing hole and spray out of the mold with the gas; the utilization rate of gas resources in the existing workshop is improved, and the problem of waste beans being discharged by punching upward is solved;

[0011] 3. The mold structure is simple and easy to process, which meets the requirements of different fracture surfaces and burr surfaces of the products.

[0012] It is required to complete the processing in a continuous mold at one time, improve product quality, ensure processing accuracy, low cost and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model in the closed mold state;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model in the mold opening state;

[0015] Figure 3 It is a schematic diagram of the punching cross-section structure of the utility model.

[0016] In the figure: 1. upper pad, 2. upper clamp, 3. heat shield, 4. stripping plate, 5. stripping back plate, 6. lower clamp, 7. lower pad, 8. forming hole, 9. blowing pipe, 10. waste beans, 11. steel eyes, 12. stripping block, 13. punch, 14. blowing hole, 15. discharge hole, 16. accommodating cavity, 17. third punch mounting hole, 18. mounting hole, 19. second punch mounting hole, 20. first punch mounting hole, 21. collapsed angle belt, 22. bright belt, 23. fracture surface, 24. burr surface, 25. heat shield hole. DETAILED DESCRIPTION

[0017] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0018] like Figure 3 As shown, the blanking section of the heat shield is composed of a collapsed angle band 21, a bright band 22, a fracture surface 23, and a burr surface 24. The directions of the fracture surface 23 and the burr surface 24 affect the functionality of the heat shield.

[0019] like Figure 1 , 2 As shown, a continuous upward punching die for heat shield production includes an upper die structure and a lower die structure;

[0020] The upper mold structure includes an upper clamping plate 2, an upper pad 1 is fixed with screws above the upper clamping plate 2, a blowing hole 14 is arranged in the upper pad 1, one end of the blowing hole 14 is connected to the blowing pipe 9, one end of the blowing pipe 9 is threadedly fixed in the threaded hole of the blowing hole 14 of the upper pad 1, and the other end is connected to the high-pressure gas source; the steel eye 11 is fixed in the accommodating cavity 16 of the upper clamping plate 2 by interference fit, the steel eye 11 is made of Cr12Mov mold steel HRC59° heat treatment, and the surface is titanium-plated to increase wear resistance; the steel eye 11 is provided with a forming hole 8 and a discharge hole 15, which are connected, and the discharge hole 15 is connected to the blowing hole 14; the discharge hole 15 is a discharge channel for the waste beans 10; the gas from the blowing pipe 9 is blown to the blowing hole 14 at high pressure, and as the blowing flow rate increases, the pressure in the blowing hole 14 is less than the pressure in the discharge hole 15, so that the waste beans 10 rise into the blowing hole 14 and are ejected out of the mold with the gas;

[0021] The lower die structure includes a lower clamping plate 6, which is fixed to the lower pad 7 below; a first punch mounting hole 20 is opened on the lower clamping plate 6, and the punch 13 is interference-fitted with the first punch mounting hole 20 of the lower clamping plate 6, and the punch 13 is made of SKD11 high-strength die steel; the backing plate 5 and the stripping plate 4 are fixedly installed on the upper part of the lower clamping plate 6 by screws in sequence, and the backing plate 5 is fixed to the stripping plate 4; a second punch mounting hole 19 is opened on the backing plate 5, and a mounting hole 18 is opened on the stripping plate 4, The stripping block 12 is interference fit in the mounting hole 18 of the stripping plate 4, and a third punch mounting hole 17 is opened on the stripping block 12; the second punch mounting hole 19 on the stripping back plate 5 is larger than the third punch mounting hole 17 on the stripping block 12; the punch 13 and the third punch mounting hole 17 of the stripping block 12 are clearance-fitted; the punch 13 matches the discharge hole 15 and the position corresponds; the stripping block 12 cooperates with the steel eye 11 to position and fix the heat insulation cover 3 between the stripping block 12 and the steel eye 11.

[0022] The punching die structure is suitable for various heat shield structures, such as single-layer, double-layer or triple-layer structures.

[0023] The utility model discloses a continuous upward punching die for heat shield production. When working, the upper die descends the heat shield 3 to be positioned and fixed between the stripping block 12 and the steel eye 11, the stripping back plate 5, the stripping plate 4 and the stripping block 12 are synchronously moved downward under the downward pressure of the upper die, and the punch 13 works through the heat shield 3 to enter the forming hole 8 to punch out the waste beans 10, and the heat shield hole 25 is processed; the punch 13 passes through the heat shield 3 to form the heat shield hole 25, and the cross-sections are in the following order: collapsed angle band 21, bright band 22, fracture surface 23, burr surface 24; the air blowing pipe 9 The gas is blown into the blowing hole 14 at high pressure. As the blowing flow rate increases, the pressure in the blowing hole 14 is less than the pressure in the discharge hole 15, so that the waste beans 10 rise and enter the blowing hole 14, and are ejected from the mold with the gas; the upper mold descends to the limit position and then rises, and the stripping plate 5, the stripping plate 4 and the stripping block 12 move upward synchronously with the upper mold, and the heat insulation cover 3 is separated from the punch 13 under the action of the stripping block 12; the stripping plate 5, the stripping plate 4 and the stripping block 12 rise to the designed position and stop rising, and the upper mold continues to rise to the upper limit position, completing a punching work cycle.

[0024] It should be understood that the technical features not elaborated in this specification belong to the prior art. Although the implementation methods of the utility model patent are described above in conjunction with the drawings, the utility model is not limited to the above specific implementation methods, which are only illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the utility model without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection scope of the utility model.

Claims

1. A die for continuous upward punching in the production of heat shields, comprising an upper die structure and a lower die structure; characterized in that: The upper mold structure comprises an upper clamping plate (2), an upper pad (1) is provided above the upper clamping plate (2), a blowing hole (14) is provided in the upper pad (1), one end of the blowing hole (14) is communicated with a blowing pipe (9), and the blowing pipe (9) is connected to a high-pressure gas source; a steel eye (11) is provided in the accommodating cavity (16) of the upper clamping plate (2), and the two are interference-fitted; a forming hole (8) and a discharge hole (15) are provided on the steel eye (11), and the two are communicated with each other, and the discharge hole (15) is communicated with the blowing hole (14); the discharge hole (15) is a discharge channel for waste beans (10); The lower die structure comprises a lower clamping plate (6), a lower pad (7) is arranged below the lower clamping plate (6); a stripping plate (5) and a stripping plate (4) are arranged above the lower clamping plate (6); a first punch mounting hole (20) is arranged on the lower clamping plate (6), a second punch mounting hole (19) is arranged on the stripping plate (5), a mounting hole (18) is arranged on the stripping plate (4), a stripping block (12) is interference-fitted in the mounting hole (18) of the stripping plate (4), and a third punch mounting hole (17) is arranged on the stripping block (12); the size of the second punch mounting hole (19) is larger than the third punch mounting hole (17); punches (13) are arranged in the first punch mounting hole (20), the second punch mounting hole (19) and the third punch mounting hole (17); the punches (13) match the discharge holes (15) and have corresponding positions.

2. A die for continuous upward punching in the production of heat shields according to claim 1, characterized in that: The stripping block (12) cooperates with the steel eye (11) to position and fix the heat insulation cover (3) between the stripping block (12) and the steel eye (11).

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