A stamping die for separating thermoformed workpieces

Abstract

This invention provides a stamping die for separating thermoformed workpieces. Using the aforementioned technical solution, a thermoformed workpiece at 880-950°C is placed between an upper die insert and a lower die insert. After the upper and lower die inserts are pressed together, cooling water in the cooling chamber cools the thermoformed workpiece. Simultaneously, the cooling water in the cooling chamber rapidly evaporates into gas and enters the steam channel. When it is necessary to separate the upper and lower die inserts, the steam valve is opened, and the gas rapidly enters the separation tank. As the gas increases, the gas pressure in the separation tank also increases. The high gas pressure allows the upper and lower die inserts to separate and create a gap, enabling complete separation of the upper and lower die inserts even with a conventional press. This application not only cools the thermoformed workpiece but also utilizes the residual heat of the thermoformed workpiece to generate hot steam, which is then converted into the separation thrust between the upper and lower die inserts. The structure is simple, energy consumption is low, and it is suitable for large-scale promotion.

Description

Technical Field

[0001] This invention relates to the field of stamping dies, and in particular to a stamping die for separating thermoformed workpieces. Background Technology

[0002] Hot forming of workpieces refers to heating workpieces with an initial strength of 500-600 MPa to 880-950℃, then feeding them into a mold with an internal cooling system for stamping and forming. Under pressure, the workpieces are rapidly quenched and cooled at a cooling rate of 20-300℃ / s, transforming from ferritic to austenitic and then to martensite, significantly increasing the strength of the parts. For the separation of hot-formed steel sheets, due to their high strength and brittleness, the stamping force is enormous, requiring large-tonnage presses. Furthermore, because the separation process is completed at a certain speed, the impact force during stamping is enormous, resulting in severe mold wear and frequent maintenance. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the aforementioned problems in the prior art, the present invention provides a stamping die for separating thermoformed workpieces.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A stamping die for separating thermoformed workpieces includes an upper die base, an upper die pressure plate, an upper die insert, a lower die insert, and a lower die base. The upper die base is elastically connected to the upper die pressure plate. The upper die insert is fixedly installed on the bottom of the upper die pressure plate. A forming groove is recessed at the bottom of the upper die insert. A cooling cavity is formed inside the upper die insert. The cooling cavity is connected to a separation groove through a steam flow channel. Multiple separation grooves are provided and arranged around the forming groove. The lower die insert is fixed on the lower die base. A stamped protrusion corresponding to the forming groove is formed on the surface of the lower die insert.

[0008] Preferably, one end of the steam flow channel is connected to the top of the cooling chamber, and the other end of the steam flow channel is connected to the separation tank, and a steam valve is provided on the steam flow channel.

[0009] Preferably, the cooling cavity has an upwardly arched arc-shaped structure, and a number of reinforcing ribs are evenly spaced inside the cooling cavity, with a number of water-permeable holes arranged on the reinforcing ribs.

[0010] Preferably, one end of the cooling chamber is connected to a water inlet pipe at the bottom, and the other end of the cooling chamber is connected to a drain pipe at the bottom.

[0011] Preferably, a piston is installed inside the separation tank, the piston is connected to a drive mechanism, and the steam flow channel is connected to one side of the bottom of the separation tank.

[0012] Preferably, a spring is installed between the upper mold base and the upper mold pressing plate, a plurality of guide rods are provided at the bottom of the upper mold base, and a guide tube corresponding to the guide rods is provided on the upper mold pressing plate.

[0013] (III) Beneficial Effects

[0014] The beneficial effects of this invention are as follows: Using the above technical solution, a thermoformed workpiece at 880-950°C is placed between the upper and lower die inserts. After the upper and lower die inserts are pressed together, the cooling water in the cooling chamber cools the thermoformed workpiece. Simultaneously, the cooling water in the cooling chamber rapidly evaporates into gas and enters the steam channel. When it is necessary to separate the upper and lower die inserts, the steam valve is opened, and the gas rapidly enters the separation tank. As the gas increases, the gas pressure in the separation tank also increases. The high gas pressure allows the upper and lower die inserts to separate and create a gap, enabling complete separation of the upper and lower die inserts even with a conventional press. This application not only cools the thermoformed workpiece but also utilizes the residual heat of the thermoformed workpiece to generate hot steam, which is then converted into the separation thrust between the upper and lower die inserts. The structure is simple, energy consumption is low, and it is suitable for large-scale promotion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a stamping die for separating thermoformed workpieces;

[0016] Figure 2 This is a view showing the connection structure of the upper die pressure plate, upper die insert, lower die insert, and lower die base.

[0017] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0018] Figure 4 for Figure 3 Enlarged schematic diagram of part A in the middle.

[0019] [Explanation of Labels in the Attached Image]

[0020] 1. Upper mold base;

[0021] 2. Upper mold pressing plate;

[0022] 3. Upper mold insert;

[0023] 31. Cooling chamber; 32. Reinforcing ribs; 33. Steam flow channel; 34. Steam valve; 35. Separation tank; 36. Forming tank; 37. Piston;

[0024] 4. Lower mold insert;

[0025] 5. Lower mold base;

[0026] 6. Thermoformed parts;

[0027] 7. Guide rod;

[0028] 8. Catheter;

[0029] 9. Spring. Detailed Implementation

[0030] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Please refer to Figures 1 to 3 The first embodiment of the present invention:

[0032] A stamping die for separating a thermoformed workpiece 6 includes an upper die base 1, an upper die pressure plate 2, an upper die insert 3, a lower die insert 4, and a lower die base 5. The upper die base 1 is elastically connected to the upper die pressure plate 2. The upper die insert 3 is fixedly installed at the bottom of the upper die pressure plate 2. A forming groove 36 is recessed at the bottom of the upper die insert 3. A cooling cavity 31 is opened in the upper die insert 3. The cooling cavity 31 is connected to a separation groove 35 through a steam flow channel 33. Multiple separation grooves 35 are provided and arranged around the forming groove 36. The lower die insert 4 is fixed on the lower die base 5. A stamping protrusion corresponding to the forming groove 36 is opened on the surface of the lower die insert 4.

[0033] One end of the steam channel 33 is connected to the top of the cooling chamber 31, and the other end of the steam channel 33 is connected to the separation tank 35. A steam valve 34 is provided on the steam channel 33. The heat of the thermoformed workpiece 6 will cause the cooling water in the cooling chamber 31 to evaporate rapidly, and the hot gas will flow upward and enter the steam channel 33.

[0034] The cooling cavity 31 has an upward arched arc structure. Several reinforcing ribs 32 are evenly spaced inside the cooling cavity 31, and several water-permeable holes are arranged on the reinforcing ribs 32. The reinforcing ribs 32 strengthen the cooling cavity 31 and prevent it from deforming during the stamping process. At the same time, the water-permeable holes on the reinforcing ribs 32 do not affect the flow of cooling water.

[0035] The cooling chamber 31 has a water inlet pipe connected to one end of its bottom and a drain pipe connected to the other end of its bottom. The water inlet pipe and the drain pipe allow for the replacement of cooling water within the cooling chamber 31.

[0036] Among them, a spring 9 is installed between the upper mold base 1 and the upper mold pressure plate 2, and multiple guide rods 7 are provided at the bottom of the upper mold base 1. The upper mold pressure plate 2 is provided with guide tubes 8 corresponding to the guide rods 7. The arrangement of the spring 9, guide rods 7 and guide tubes 8 can play a buffering and shock-absorbing role when the upper mold insert 3 and the lower mold insert 4 are pressed together or separated.

[0037] In use, the thermoformed workpiece 6 at 880-950℃ is placed between the upper mold insert 3 and the lower mold insert 4. After the upper mold insert 3 and the lower mold insert 4 are pressed together, the cooling water in the cooling chamber 31 can cool the thermoformed workpiece 6. At the same time, the cooling water in the cooling chamber 31 quickly evaporates into gas and enters the steam channel 33. When it is necessary to separate the upper mold insert 3 and the lower mold insert 4, the steam valve 34 is opened and the gas quickly enters the separation tank 35. As the gas increases, the gas pressure in the separation tank 35 also increases. The high gas pressure allows the upper mold insert 3 and the lower mold insert 4 to separate and create a gap, so that the upper mold insert 3 and the lower mold insert 4 can be completely separated even when using a regular press.

[0038] refer to Figure 3 and Figure 4 The second embodiment of the present invention:

[0039] Based on the above embodiment 1, a piston 37 is installed in the separation tank 35, the piston 37 is connected to the drive mechanism, and the steam flow channel 33 is connected to one side of the bottom of the separation tank 35.

[0040] When in use, the cooling water in the cooling chamber 31 rapidly evaporates into gas and enters the separation tank 35 through the steam flow channel 33. The piston 37 is driven down by the drive mechanism, which can further increase the gas pressure in the separation tank 35 and increase the separation thrust of the gas pressure.

[0041] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The scope of protection of this invention does not involve any improvement to the software and methods.

[0042] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention's specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A press die for separating a thermoformed workpiece, characterized by, The utility model provides a stamping die, including upper die base, upper die material pressing plate, upper die insert, lower die insert and lower die base, the upper die base is elastically connected with upper die material pressing plate, upper die insert is fixedly installed in upper die material pressing plate bottom, the bottom of upper die insert is recessed with forming groove, the cooling cavity is seted up in upper die insert, cooling cavity is connected separation groove through steam flow channel, separation groove is equipped with a plurality of and surrounds forming groove and sets up, lower die insert is fixed on lower die base, and the surface of lower die insert is seted up with the stamping protruding of corresponding with forming groove.

2. The press die for separating a thermoformed workpiece according to claim 1, characterized in that, One end of the steam flow channel communicates with the top of the cooling cavity, the other end of the steam flow channel communicates with the separation groove, and a steam valve is arranged on the steam flow channel.

3. The press die for separating a thermoformed workpiece according to claim 1, wherein The cooling cavity is in the shape of an upwardly arched arc, and a plurality of reinforcing rib plates are arranged at equal intervals in the cooling cavity.

4. The press die for separating a thermoformed workpiece according to claim 3, wherein One end of the cooling cavity is connected to a water inlet pipe, and the other end of the cooling cavity is connected to a drain pipe.

5. The press die for separating a thermoformed workpiece according to claim 1, wherein A piston is installed in the separation groove, the piston is connected to a driving mechanism, and the steam flow channel is connected to one side of the bottom of the separation groove.

6. The press die for separating a thermoformed workpiece according to claim 1, wherein Springs are installed between the upper die base and the upper die material pressing plate, a plurality of guide rods are arranged on the bottom of the upper die base, and a plurality of guide pipes corresponding to the guide rods are arranged on the upper die material pressing plate.

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