An apparatus for forging liquid metal with ultra-high pressure nitrogen

Abstract

The present invention relates to a production device for brand-new high-demand mechanical components, specifically a device for forging liquid metal with ultra-high pressure nitrogen. By means of forging metal liquid with ultra-high pressure air, high density of mechanical components is achieved, the crystal grains are reduced, thereby greatly improving the tensile strength, elongation rate, corrosion resistance, erosion resistance and high-temperature resistance of metal products, etc. It includes a liquid nitrogen tank (1), a check valve I (2), a plunger pump (3), an oil cylinder (4), a check valve II (5) and a liquid metal pressurizing device (6). The liquid nitrogen tank (1), the check valve I (2), the plunger pump (3), the check valve II (5) and the liquid metal pressurizing device (6) are connected in sequence, and the plunger pump (3) is driven and pressurized by the oil cylinder (4); the liquid metal pressurizing device (6) includes a cylinder body (7), a cock (8), a sealing assembly (9), and a liquid nitrogen gasification generating device (10).

Description

Technical Field

[0001] The present invention relates to a production device for brand-new high-requirement mechanical components, specifically a device for forging liquid metal with ultra-high-pressure nitrogen. Background Technique

[0002] With the development of technology, the requirements for metal components have been greatly improved. Especially in many harsh working environments, such as extreme states of high temperature, ultra-high pressure, corrosion resistance, etc., the requirements for products are significantly increased. However, the mechanical components produced by current production methods and processes cannot meet the requirements of mechanical operation. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a device for forging liquid metal with ultra-high-pressure nitrogen. By means of forging metal liquid with ultra-high-pressure air, high density of mechanical components is achieved, the crystal grains are refined, thereby greatly improving the tensile strength, elongation, corrosion resistance, erosion resistance, high-temperature resistance and other properties of metal products.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a device for forging liquid metal with high-pressure nitrogen, including a liquid nitrogen tank, a one-way valve I, a plunger pump, an oil cylinder, a one-way valve II and a liquid metal pressurizing device. The liquid nitrogen tank, the one-way valve I, the plunger pump, the one-way valve II and the liquid metal pressurizing device are connected in sequence, and the plunger pump is driven and pressurized by the oil cylinder; the liquid metal pressurizing device includes a cylinder body, a plug, a sealing component and a liquid nitrogen gasification generating device. The plug is rotationally matched with the cylinder body, a sealing component is provided on the plug, the sealing component abuts against the inner wall of the cylinder body, an air passage is provided on the side wall of the cylinder body, the liquid nitrogen gasification generating device is made of metal and can be detachably connected to the inner wall of the cylinder body, and a gasification chamber is provided inside the liquid nitrogen gasification generating device; an air inlet is provided on the side of the liquid nitrogen gasification generating device; the air inlet is communicated with the one-way valve II through the air passage, a pressurizing port is provided at the top of the liquid nitrogen gasification generating device, and both the air inlet and the pressurizing port are communicated with the gasification chamber.

[0005] Preferably, a boss is provided on the inner wall of the cylinder body, the plug and the sealing component are arranged above the boss, the plug abuts against the inner wall of the cylinder body through the sealing component, and there is a distance of 0.03 - 0.05 mm between the bottom of the plug and the lower part of the boss.

[0006] Preferably, there is a gap between the air inlet and the air passage.

[0007] Preferably, a rectangular protrusion is provided on the outer wall of the liquid nitrogen gasification generating device, and a rectangular groove-shaped clamping slot is provided on the inner wall of the cylinder body. The liquid nitrogen gasification generating device is detachably connected through the rectangular protrusion and the clamping slot.

[0008] Preferably, there are multiple pressurizing ports which are arranged in a ring shape.

[0009] The device for forging liquid metal with high-pressure nitrogen of the present invention has the following advantages:

[0010] Firstly, the present invention can achieve forging of metal in the case of liquid metal.

[0011] Secondly, the super-large pressure achieved through liquid nitrogen gasification is combined with the shaping and extrusion of the liquid metal by the film shell in the lost-wax casting technology in precision manufacturing, thereby effectively reducing the grain size and increasing the grain density.

[0012] Thirdly, it can effectively improve the properties of the metal such as tensile strength, elongation, corrosion resistance, erosion resistance, and high-temperature resistance. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the device for forging liquid metal with high-pressure nitrogen of the present invention;

[0014] Figure 2 is a schematic structural diagram of the liquid metal pressurizing device of the present invention Figure 1 ;

[0015] Figure 3 is a schematic structural diagram of the liquid metal pressurizing device of the present invention Figure 2 ;

[0016] Figure 4 is a top view of the liquid metal pressurizing device of the present invention;

[0017] Figure 5 is a schematic structural diagram of the liquid nitrogen gasification generating device of the present invention.

[0018] Description of the Drawings: 1. Liquid nitrogen tank; 2. Check valve one; 3. Plunger pump; 4. Oil cylinder; 5. Check valve two; 6. Liquid metal pressurizing device; 7. Cylinder body; 71. Air passage; 72. Boss; 73. Card slot; 8. Stopcock; 9. Sealing assembly; 10. Liquid nitrogen gasification generating device; 101. Gasification cavity; 102. Air inlet; 103. Pressurizing port; 104. Protrusion. Detailed Embodiments

[0019] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0020] As Figures 1 to 5As shown in the figure, a device for forging liquid metal with high-pressure nitrogen includes a liquid nitrogen tank 1, a one-way valve 2, a plunger pump 3, an oil cylinder 4, a one-way valve 5 and a liquid metal pressurizing device 6. The liquid nitrogen tank 1, the one-way valve 2, the plunger pump 3, the one-way valve 5 and the liquid metal pressurizing device 6 are connected in sequence. The plunger pump 3 is driven and pressurized by the oil cylinder 4. The liquid metal pressurizing device 6 includes a cylinder body 7, a cock 8, a sealing assembly 9, and a liquid nitrogen gasification device 10. The cock 8 is rotationally matched with the cylinder body 7. A sealing assembly 9 is provided on the cock 8, and the sealing assembly 9 abuts against the inner wall of the cylinder body 7. An air passage 71 is provided on the side wall of the cylinder body 7. The liquid nitrogen gasification device 10 is made of metal and is detachably connected to the inner wall of the cylinder body 7. An airification chamber 101 is provided inside the liquid nitrogen gasification device 10. An air inlet 102 is provided on the side of the liquid nitrogen gasification device 10. The air inlet 102 is communicated with the one-way valve 5 through the air passage 71. A pressure boosting port 103 is provided on the top of the liquid nitrogen gasification device 10. Both the air inlet 102 and the pressure boosting port 103 are communicated with the airification chamber 101.

[0021] A boss 72 is provided on the inner wall of the cylinder body 7. The cock 8 and the sealing assembly 9 are provided above the boss 72. The cock 8 abuts against the inner wall of the cylinder body 7 through the sealing assembly 9. There is a gap of 0.03 - 0.05 millimeters between the bottom of the cock 8 and the lower part of the boss 72.

[0022] There is a gap between the air inlet 102 and the air passage 71. A rectangular protrusion 104 is provided on the outer wall of the liquid nitrogen gasification device 10. A clamping groove 73 with a rectangular notch is provided on the inner wall of the cylinder body 7. The liquid nitrogen gasification device 10 is detachably connected through the rectangular protrusion 104 and the clamping groove 73.

[0023] Open the cock 8 of the liquid metal pressurizing device 6, take out the liquid nitrogen vaporization generating device 10 from the cylinder body 7, and heat it to above 1200 °C; produce the shell of the metal to be formed by the investment casting method, heat the metal to the liquid state and pour it into the shell, and put the shell together with the high-temperature liquid metal into the cylinder body 7; install the heated liquid nitrogen vaporization generating device 10 into the cylinder body 7, then screw the cock 8 into the cylinder body 7 and keep the sealing component 9 in contact with the inner wall of the cylinder body 7 to maintain the sealing effect between the sealing component 9 and the inner wall of the cylinder body 7; open the liquid nitrogen tank 1, close the check valve II 5, open the check valve I 2, and after the liquid nitrogen flows through the check valve I 2, it enters the plunger pump 3; close the check valve I 2, close the check valve II 5, pressurize the plunger pump 3 through the oil cylinder 4, and after the pressurization is completed, open the check valve II 5 and keep the check valve I 2 closed; the liquid nitrogen is sprayed towards the air inlet 102 of the liquid nitrogen vaporization generating device 10 after passing through the check valve II 5 and the air passage 71, and the liquid nitrogen instantaneously vaporizes in the vaporization chamber 101 of the liquid nitrogen vaporization generating device 10; the vaporized nitrogen gas will pressurize the inside of the cylinder body 7 while maintaining a vertically upward spraying state through the pressurization port 103, so that the pressure inside the cylinder body 7 instantaneously rises to 300 Mpa; and the gas will be heated by the external heat of the liquid nitrogen vaporization generating device 10, and the high-temperature liquid metal in the shell will be extruded by high temperature and high pressure and kept warm; when the liquid metal is formed in the shell and gradually cools down, open the cock 8 and take out the metal part; a part of the liquid nitrogen will also vaporize when it contacts the shell of the liquid nitrogen vaporization generating device 10 after passing through the check valve II 5 and the air passage 71.

[0024] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An apparatus for forging liquid metal with high-pressure nitrogen, characterized in that: It includes a liquid nitrogen tank (1), a one-way valve one (2), a plunger pump (3), an oil cylinder (4), a one-way valve two (5) and a liquid metal pressurizing device (6). The liquid nitrogen tank (1), the one-way valve one (2), the plunger pump (3), the one-way valve two (5) and the liquid metal pressurizing device (6) are connected in sequence. The plunger pump (3) is driven and pressurized by the oil cylinder (4). The liquid metal pressurizing device (6) includes a cylinder body (7), a cock (8), a sealing assembly (9), and a liquid nitrogen gasification generating device (10). The cock (8) is rotationally matched with the cylinder body (7). A sealing assembly (9) is provided on the cock (8), and the sealing assembly (9) abuts against the inner wall of the cylinder body (7). An air passage (71) is provided on the side wall of the cylinder body (7). The liquid nitrogen gasification generating device (10) is made of metal and is detachably connected to the inner wall of the cylinder body (7). A gasification chamber (101) is provided inside the liquid nitrogen gasification generating device (10). An air inlet (102) is provided on the side of the liquid nitrogen gasification generating device (10). The air inlet (102) is communicated with the one-way valve two (5) through the air passage (71). A pressurizing port (103) is provided on the top of the liquid nitrogen gasification generating device (10). Both the air inlet (102) and the pressurizing port (103) are communicated with the gasification chamber (101). A boss (72) is provided on the inner wall of the cylinder body (7). The cock (8) and the sealing assembly (9) are arranged above the boss (72). The cock (8) abuts against the inner wall of the cylinder body (7) through the sealing assembly (9). There is a distance of 0.03 - 0.05 millimeters between the bottom of the cock (8) and below the boss (72).

2. The device for forging liquid metal with high-pressure nitrogen according to claim 1, wherein: There is a gap between the air inlet (102) and the air passage (71).

3. The device for forging liquid metal with high-pressure nitrogen according to claim 1, wherein: A rectangular protrusion (104) is provided on the outer wall of the liquid nitrogen gasification generating device (10). A clamping groove (73) with a rectangular notch is provided on the inner wall of the cylinder body (7). The liquid nitrogen gasification generating device (10) is detachably connected through the rectangular protrusion (104) and the clamping groove (73).

4. The device for forging liquid metal with high-pressure nitrogen according to claim 1, characterized in that: The pressurizing ports (103) are multiple and arranged in a ring shape.

Images