Container type counter-pressure casting machine for large tank

Abstract

The utility model relates to a large tank container type counter-pressure casting machine which comprises a machine frame, a working table plate is installed on the machine frame, a tank is installed above the working table plate, a heat preservation furnace is installed below the working table plate, the tank is connected with the heat preservation furnace through a liquid lifting device, and the tank is provided with a locking mechanism. The heat preservation furnace is connected with a furnace cover mechanism, a mold filling partition mechanism and a heat preservation furnace lifting mechanism. According to the utility model, brand new large tank type casting equipment is derived on the basis of the traditional counter-pressure casting, and is an air inlet mold filling system of a large-volume product, and the product quality is greatly improved by detecting and analyzing the manufactured casting product. The utility model solves the problem that large aluminum alloy casting products are difficult to carry out counter-pressure casting to improve the product performance, improves the process of a large sand casting system, and also provides novel production equipment for large aluminum casting products in aviation and military industry.

Description

Technical Field

[0001] The utility model relates to a differential pressure casting machine, in particular to a container type differential pressure casting machine, and belongs to the technical field of differential pressure casting equipment. Background Art

[0002] The castings of differential pressure casting are formed in a pressure environment, so the density of metal crystals is higher than that of low-pressure casting, and the moldability is good, which is more conducive to the molding of large thin-walled castings. The differential pressure casting machine in the prior art cannot pressurize and fill large-volume tanks or holding furnaces. After the tank is pressurized, it cannot provide a pressure atmosphere for the casting products. Therefore, the performance of the large aluminum alloy casting products obtained is poor, especially limiting the production of large aluminum casting products in aviation and military industries.

[0003] Based on this, the present utility model is proposed. Utility Model Content

[0004] In view of the above-mentioned technical problems of the prior art, the purpose of the utility model is to provide a large tank container type differential pressure casting machine, which places the mold in an extra-large tank body, pressurizes the tank body to provide a pressure atmosphere for the casting product, and cooperates with a large insulation furnace for pressurized filling, thereby greatly improving the strength performance of the product.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] A large tank container type differential pressure casting machine comprises a frame, a work table is installed on the frame, a tank is installed above the work table, and a holding furnace is installed below the work table. The tank and the holding furnace are connected via a liquid lifting device, the tank is provided with a locking mechanism, the holding furnace is connected with a furnace cover mechanism, a filling partition mechanism and a holding furnace lifting mechanism, and the filling accuracy of the filling partition mechanism is ≤1mbar.

[0007] The height of the tank body is 2200-2800 mm, and the inner diameter of the tank body is 3000-3500 mm.

[0008] The available aluminum amount of the holding furnace is 2800-3200 kg.

[0009] The length and width of the workbench are both 3500-4200mm, and the bearing capacity of the workbench is 200-250T.

[0010] The locking mechanism includes a fixed clamping ring, a rotating clamping ring is arranged between the fixed clamping ring and the outer wall of the tank body, the rotating clamping ring is connected to a driving mechanism, and a wedge-shaped locking component is arranged on the rotating clamping ring, and the rotating clamping ring and the tank body are locked by the wedge-shaped locking component.

[0011] The wedge-shaped locking component includes a wedge-shaped clamping block 1 and a wedge-shaped clamping block 2. The wedge-shaped clamping block 1 is installed on the rotating clamping ring, and the wedge-shaped clamping block 2 is installed on the tank body. The wedge-shaped clamping block 1 and the wedge-shaped clamping block 2 are meshed to achieve locking. A sensing device is provided on one side of the fixed clamping ring. After the wedge-shaped clamping block 1 and the wedge-shaped clamping block 2 lock the rotating clamping ring and the tank body, the locking position is detected by the sensing device.

[0012] The tank body is provided with a tank body guiding mechanism and a tank body positioning mechanism, and the rotating clamping ring rotates along the tank body guiding mechanism and is positioned by the tank body positioning mechanism.

[0013] The liquid lifting device includes a liquid lifting pipe, a sealing device is provided between the liquid lifting pipe and the tank body, the sealing device includes a ceramic sleeve mounted on the end of the liquid lifting pipe, a sealing flange is provided at the upper end of the ceramic sleeve, a liquid lifting pipe flange is provided at the lower end of the ceramic sleeve, and a sealing gasket is provided between the ceramic sleeve and the liquid lifting pipe flange.

[0014] The filling partition mechanism includes a main air inlet pipe provided with a main air inlet, the main air inlet pipe is connected with an insulation furnace air inlet pipe provided with an insulation furnace air inlet, the insulation furnace air inlet pipe is connected with a tank air inlet pipe provided with a tank air inlet, the insulation furnace air inlet pipe is provided with a cylinder, the cylinder is connected with a sealing piston, and the sealing piston is located at the connection between the insulation furnace air inlet pipe and the tank air inlet pipe.

[0015] The tank air inlet pipe is connected with a pressure detection device.

[0016] The beneficial effects of the utility model are as follows:

[0017] The large tank container differential pressure casting machine of the utility model is a new large tank casting equipment derived from the traditional differential pressure casting. It is an air intake and filling system for large-volume products. The detection and analysis of the casting products produced by it have greatly improved the product quality. The utility model solves the problem that it is difficult to perform differential pressure casting to improve product performance of large aluminum alloy casting products, improves the process of large sand casting systems, and also provides a new type of production equipment for large aluminum casting products in aviation and military industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the sealing device in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the mold filling partition device in the utility model;

[0022] Figure 5 It is a schematic diagram of the locking mechanism in the utility model being connected to the tank body;

[0023] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part A;

[0024] Figure 7 is a structural schematic diagram of the locking mechanism;

[0025] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of part B;

[0026] Fig. 9 and 10 This is a schematic diagram of the main structure of the locking mechanism in the utility model connected to the tank body;

[0027] Fig.11 for Fig. 9 A schematic diagram of the enlarged structure of the middle C part;

[0028] Fig.12 for Fig.10 A schematic diagram of the enlarged structure of the D part;

[0029] Among them, 1 is a frame, 2 is a workbench, 3 is a tank body, 4 is a holding furnace, 5 is a locking mechanism, 51 is a fixed clamping ring, 52 is a rotating clamping ring, 53 is a driving mechanism, 54 is a wedge-shaped locking component, 541 is a wedge-shaped clamping block, 542 is a sensing device, 55 is a tank body guiding mechanism, 56 is a tank body positioning mechanism, 6 is a furnace cover mechanism, 7 is a filling partition mechanism, 71 is a main air inlet, 72 is a main air inlet pipe, 73 is a holding furnace air inlet, 74 is a holding furnace air inlet pipe, 75 is a tank body air inlet, 76 is a tank body air inlet pipe, 77 is a cylinder, 78 is a sealing piston, 79 is a pressure detection device, 8 is a holding furnace lifting mechanism, 9 is a liquid lifting device, 91 is a liquid lifting pipe, 92 is a ceramic sleeve, 93 is a sealing flange, 94 is a liquid lifting pipe flange, and 95 is a sealing gasket. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0031] The large-scale aluminum alloy casting tank differential pressure casting equipment is a new large-scale tank casting equipment derived from the traditional differential pressure casting. It solves the problem that large-scale aluminum alloy casting products are difficult to perform differential pressure casting to improve product performance, and also provides a new type of production equipment for large-scale aluminum casting products in aviation and military industries. The castings of differential pressure casting are formed in a pressure environment, so the density of metal crystallization is higher than that of low-pressure casting, and the formability is good, which is more conducive to the forming of large thin-walled castings; in order to improve the process of large sand casting systems, differential pressure casting equipment for super-large tank containers and air intake and filling systems for large-volume products are produced. By placing the mold in a super-large tank, the tank is pressurized to provide a pressure atmosphere for the casting product, and at the same time, with the large insulation furnace pressurized filling, the product strength performance is greatly improved. After on-site production, the casting products are tested and analyzed, and the product quality has been greatly improved.

[0032] The specific technical scheme of the large tank container type differential pressure casting machine of the utility model is as follows:

[0033] like Figure 1-12 As shown, the large tank container type differential pressure casting machine of the utility model includes a frame 1, a workbench 2 is installed on the frame 1, a tank body 3 is installed above the workbench 2, a heat preservation furnace 4 is installed below the workbench 2, the tank body 3 and the heat preservation furnace 4 are connected by a liquid lifting device 9, the tank body 3 is provided with a locking mechanism 5, and the heat preservation furnace 4 is connected to a furnace cover mechanism 6, a filling partition mechanism 7 and a heat preservation furnace lifting mechanism 8.

[0034] Preferably, the height of the tank body 1 is 2200-2800mm, and the inner diameter is 3000-3500mm, such as the inner diameter is 3200mm, and the height is 2600mm. The super-large tank body 1 is 10 times the volume of the previous differential pressure casting equipment, and meets the production of 2200x2500mm volume products. The length and width of the workbench 2 are both 3500-4200mm, and the bearing capacity of the workbench 2 is 200-250T. The available aluminum amount of the insulation furnace 4 is 2800-3200kg. For example, the size of the super-large workbench 2 is 4000x4000mm, which can withstand the super-large counter-pressure force of the tank body 210T. The available aluminum amount of the insulation furnace 4 is up to 3000Kg, which can cast large aluminum alloy castings such as high-voltage electrical and military products, solving the problem that differential pressure casting can only cast small parts in the past.

[0035] It is further provided that the lifting device 9 in the utility model includes a lifting tube 91, a sealing device is provided between the lifting tube 91 and the tank body 1, the sealing device includes a ceramic sleeve 92 sleeved on the end of the lifting tube 91, a sealing flange 93 is provided at the upper end of the ceramic sleeve 92, a lifting tube flange 94 is provided at the lower end of the ceramic sleeve 92, and a sealing gasket 95 is provided between the ceramic sleeve 92 and the lifting tube flange 93.

[0036] Further, the mold filling partition mechanism 7 in the utility model includes a main air inlet pipe 72 provided with a main air inlet 71, the main air inlet pipe 72 is connected to a heat preservation furnace air inlet pipe 74 provided with a heat preservation furnace air inlet 73, the heat preservation furnace air inlet pipe 74 is connected to a tank air inlet pipe 76 provided with a tank air inlet 75, the heat preservation furnace air inlet pipe 74 is provided with a cylinder 77, the cylinder 77 is connected with a sealing piston 78, the sealing piston 78 is located at the connection between the heat preservation furnace air inlet pipe 74 and the tank air inlet pipe 76, and the tank air inlet pipe 76 is connected with a pressure detection device 79. The sealing piston 78 is blocked by the cylinder 77, the heat preservation furnace air inlet pipe 74 is separated from the tank air inlet pipe 76, and the tank 3 is separated from the heat preservation furnace 4, so that a pressure difference is formed between the tank 3 and the heat preservation furnace 4 to meet the conditions for product filling casting. During the pressure filling casting of the tank body 3 and the holding furnace 4, a high pressure filling environment of 0.4Mpa can be achieved inside the holding furnace 4 and the tank body 3, and the filling control accuracy is ≤1mbar. It has extremely high filling control accuracy, meets a variety of fine filling control processes, and further improves the density of the product.

[0037] The filling partition mechanism 7 ensures the pressure difference between the tank body 3 and the insulation furnace 4, and maintains a stable pressure atmosphere on both sides; for large containers, it is difficult to ensure sealing. The differential pressure casting equipment in the prior art can solve the leakage caused by the pipe sealing problem, resulting in low filling accuracy and difficulty in ensuring the qualified rate of the product. In the utility model, the tank body 3 solves the sealing performance of the tank body 3 and the insulation furnace 4 through a large torque compression ring and a special sealing device at the position of the liquid riser 91 of the insulation furnace 4, and the filling partition mechanism 7 ensures that the channel between the two containers is disconnected in time, ensures the pressure difference on both sides, and the air intake stability, which can improve the filling accuracy of the equipment, and for casting equipment, the filling accuracy is an absolute indicator of equipment quality.

[0038] The holding furnace 4 is also provided with an aluminum liquid suspension function, that is, the aluminum liquid level is pressurized by filling the mold inside the holding furnace 4, so that the aluminum liquid rises to the throat position of the rising tube through the rising tube 91. Before the product production and casting begins, the aluminum liquid level is prepared to be close to the mold gate to speed up the product casting production efficiency. A warming rising tube function is also provided, that is, after the aluminum liquid is pressurized by the air intake in the holding furnace 4, the aluminum liquid rises to the throat position through the rising tube 91, and then the pressure in the holding furnace 4 is reduced, so that the raised liquid level in the rising tube 91 falls back into the holding furnace 4, and the holding furnace 4 is repeatedly inlet and outlet to achieve the aluminum liquid repeatedly flushing the rising tube 91, achieving the effect of preheating the rising tube 91, and improving the service life of the rising tube 91, which has improved the problem of the aluminum liquid throat and increased the casting fluidity of the aluminum liquid. A throat heating function is further provided, i.e. a heating coil is arranged at the throat of the riser pipe flange 94 to continuously heat the throat of the riser pipe 91 to prevent the throat of the riser pipe 91 from cooling down due to too long a pressure holding time of the product. This prevents aluminum liquid from solidifying at the throat and blocking the riser pipe 91, thereby ensuring that the throat of the riser pipe 91 will not freeze when the pressure is held for a very long time for large castings.

[0039] The utility model also realizes the combination of positive pressure and negative pressure, that is, the utility model can pressurize the holding furnace 4 to fill the mold by positive pressure filling, and pressurize the aluminum liquid in the holding furnace 4 into the mold inside the tank body 3 for casting production; it can also form a pressure difference between the tank body 3 and the holding furnace 4 by negative pressure vacuuming the tank body 3, and pump the aluminum liquid into the mold for raw casting production. This filling casting production method can be equipped with a negative pressure device for negative pressure filling production, and through the vacuum system, the casting process makes the casting more dense and compact.

[0040] In addition, when the insulation furnace 4 is replaced by the utility model, an electrical quick-plug device for the insulation furnace is configured. The insulation furnace 4 is automatically pushed into the frame 1 by the furnace changing trolley. No manual intervention is required. The insulation furnace 4 automatically connects the pneumatic and electrical pipelines to provide power, reduce work intensity, and improve the safety of manual operation. Moreover, the standardized interface design in the utility model can be paralleled with conventional differential pressure casting equipment or low-pressure casting equipment to share the furnace changing system for production, which is convenient for customer plant layout and compatible with the joint production of multiple products. The electrical quick-plug device in the utility model can use components commonly used in the prior art. Its specific structure, connection relationship and working principle are common knowledge in the field and are not described in detail in the utility model.

[0041] As mentioned above, large tank equipment needs to be equipped with a heavy tank device. After the tank 3 is in place, the equipment needs to be filled and cast. The sealing performance of the equipment after filling represents the comprehensive ability of the equipment. In order to ensure the sealing, a reliable locking device is required. The locking mechanism of the tank 3 has the advantages of high pressure, fast speed, and reliable compression. Therefore, the utility model is further provided with a locking mechanism 5 installed at the lower part of the tank 3. The specific structure of the locking mechanism 5 is as follows:

[0042] The locking mechanism 5 includes a fixed clamping ring 51 and a rotating clamping ring 52. The rotating clamping ring 52 is located between the fixed clamping ring 51 and the outer wall of the tank body 3. The rotating clamping ring 52 is connected to a driving mechanism 53, and a wedge-shaped locking component 54 is provided on the rotating clamping ring 52. The wedge-shaped locking component 54 includes a wedge-shaped clamping block 1 541 and a wedge-shaped clamping block 2 542. The wedge-shaped clamping block 1 541 is installed on the rotating clamping ring 52, and the wedge-shaped clamping block 2 544 is installed on the tank body 3. The wedge-shaped clamping block 1 541 and the wedge-shaped clamping block 2 542 are meshed to achieve locking. A sensing device 57 is provided on one side of the fixed clamping ring 51. After the wedge-shaped clamping block 1 541 and the wedge-shaped clamping block 542 lock the rotating clamping ring 52 and the tank body 3, the locking position is detected by the sensing device 57.

[0043] The tank body guiding mechanism 55 and the tank body positioning mechanism 56 are provided on the tank body 3, and the rotating clamping ring 52 rotates along the tank body guiding mechanism 55 and is positioned by the tank body positioning mechanism 56. The driving mechanism 53 is a cylinder driving mechanism, which drives the rotating clamping ring 52 to rotate along the tank body guiding mechanism 55 and is positioned by the tank body positioning mechanism 56. The rotating clamping ring 52 and the tank body 3 are locked by the mutual locking of the wedge-shaped clamping block 1 541 and the wedge-shaped clamping block 2 542, and the locking position is detected by the sensing device 57.

[0044] Preferably, there are two driving mechanisms 53 which are in a diagonal position relationship, that is, they are powered by two diagonally arranged oil cylinders, and a wedge-shaped pressing block 541 installed on the rotating pressing ring 52 cooperates with a wedge-shaped pressing block 542 embedded in the tank body 3 to form a downward pressing force on the tank body 3, and cooperates with the sealing ring on the bottom of the tank body 3 and the workbench 2 to form a sealing effect; the outer side of the rotating pressing ring 52 is fixed by the fixed pressing ring 51, and the upward pressing force is offset to the workbench 2 through the fixed pressing ring 51.

[0045] The utility model can also be switched between differential pressure and low pressure modes at any time. After the equipment removes the tank body 3, the program is set to the low-pressure casting mode, and the production can be switched. The pressurization of the tank body 3 is controlled separately, and the differential pressure and low pressure can be switched mutually through program control. The equipment is configured with two sets of compatible control programs. After the sealed tank body 3 is lifted away, conventional production can be carried out through the low-pressure machine casting mode.

[0046] The above embodiments are only used to explain the inventive concept of the utility model, rather than to limit the protection of the rights of the utility model. Any non-substantial changes to the utility model using this concept should fall within the protection scope of the utility model.

Claims

1. A large tank container type differential pressure casting machine, comprising a frame, on which a workbench is mounted, characterized in that: A tank body is installed above the workbench, and an insulation furnace is installed below the workbench. The tank body and the insulation furnace are connected via a liquid lifting device. The tank body is provided with a locking mechanism. The insulation furnace is connected with a furnace cover mechanism, a filling partition mechanism and an insulation furnace lifting mechanism. The filling accuracy of the filling partition mechanism is ≤1mbar.

2. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The height of the tank body is 2200-2800 mm, and the inner diameter of the tank body is 3000-3500 mm.

3. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The available aluminum amount of the holding furnace is 2800-3200 kg.

4. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The length and width of the workbench are both 3500-4200mm, and the bearing capacity of the workbench is 200-250T.

5. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The locking mechanism includes a fixed clamping ring, a rotating clamping ring is arranged between the fixed clamping ring and the outer wall of the tank body, the rotating clamping ring is connected to a driving mechanism, and a wedge-shaped locking component is arranged on the rotating clamping ring, and the rotating clamping ring and the tank body are locked by the wedge-shaped locking component.

6. The large tank container type differential pressure casting machine according to claim 5, characterized in that: The wedge-shaped locking component includes a wedge-shaped clamping block 1 and a wedge-shaped clamping block 2. The wedge-shaped clamping block 1 is installed on the rotating clamping ring, and the wedge-shaped clamping block 2 is installed on the tank body. The wedge-shaped clamping block 1 and the wedge-shaped clamping block 2 are meshed to achieve locking. A sensing device is provided on one side of the fixed clamping ring. After the wedge-shaped clamping block 1 and the wedge-shaped clamping block 2 lock the rotating clamping ring and the tank body, the locking position is detected by the sensing device.

7. The large tank container type differential pressure casting machine according to claim 5, characterized in that: The tank body is provided with a tank body guiding mechanism and a tank body positioning mechanism, and the rotating clamping ring rotates along the tank body guiding mechanism and is positioned by the tank body positioning mechanism.

8. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The liquid lifting device includes a liquid lifting pipe, a sealing device is provided between the liquid lifting pipe and the tank body, the sealing device includes a ceramic sleeve mounted on the end of the liquid lifting pipe, a sealing flange is provided at the upper end of the ceramic sleeve, a liquid lifting pipe flange is provided at the lower end of the ceramic sleeve, and a sealing gasket is provided between the ceramic sleeve and the liquid lifting pipe flange.

9. The large tank container type differential pressure casting machine according to claim 1, characterized in that: The filling partition mechanism includes a main air inlet pipe provided with a main air inlet, the main air inlet pipe is connected with an insulation furnace air inlet pipe provided with an insulation furnace air inlet, the insulation furnace air inlet pipe is connected with a tank air inlet pipe provided with a tank air inlet, the insulation furnace air inlet pipe is provided with a cylinder, the cylinder is connected with a sealing piston, and the sealing piston is located at the connection between the insulation furnace air inlet pipe and the tank air inlet pipe.

10. The large tank container type differential pressure casting machine according to claim 9, characterized in that: The tank air inlet pipe is connected with a pressure detection device.

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