An efficient wheel-type casting machine and its supporting casting method

Abstract

The present invention provides an efficient wheel-type casting machine and a supporting casting method, which relate to the technical field of metal casting. The efficient wheel-type casting machine includes a crystallization wheel (1), a steel belt (2), a conveying channel (3) and a pressing wheel. An inwardly concave crystallization wheel groove (4) is formed on the crystallization wheel (1). The steel belt (2) is installed on a steel belt tensioning wheel (5), tightened by a steel belt wheel (6) and bypasses the pressing wheel. A part of the crystallization wheel groove (4) is in close contact with the steel belt (2) through the pressing wheel to form a cavity extending along the circumferential direction of the crystallization wheel (1). The feeding port of the cavity is the pouring gate (8). An ingot lifter (9) for leading out the ingot is arranged in the cavity. A wheel-type channel (10) communicated with the cavity is arranged beside the ingot lifter (9). A casting ingot traction device is arranged at the connection of the wheel-type channel (10) and the conveying channel (3). The present invention can improve the current wheel-type casting machine at low cost and effectively improve its productivity.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting, and particularly relates to an efficient wheel type casting machine and its supporting casting method. Background Art

[0002] Currently, the commonly used wheel type casting machine, such as the casting machine disclosed in Patent No. CN200920037329.X for an aluminum and aluminum alloy continuous casting and rolling production line, includes a machine base and a crystallizing wheel. There is a horizontal combined ladle at the front end of the crystallizing wheel. There is a transmission device on the machine base. Cooling devices are provided on the inner side, outer side, left and right sides of the crystallizing wheel. They are combined and installed on a cooling water distributor. The cooling water distributor is fixed at one end of a horizontal rotating arm and can rotate horizontally as a whole and move outward. Since the aluminum and aluminum alloy wheel type horizontal casting machine is equipped with a horizontal combined ladle and the horizontal position of the outlet end of the stainless steel nozzle is placed at the joint of the cavity of the crystallizing wheel and the pressing wheel, when the aluminum and aluminum alloy liquid is cast into the cavity, the situation of air entering the ingot due to the generation of eddy currents is avoided.

[0003] However, during the casting process, when the molten metal cools in the crystallizing wheel and solidifies to form a shell of a certain thickness, due to the shrinkage of the billet shell, gaps (air gaps) will be generated with the crystallizing wheel and the steel belt. Its heat transfer resistance accounts for 70% - 80% of the total heat transfer resistance. In this case, the cooling efficiency drops significantly, directly affecting the productivity. In order to improve the productivity, most technical solutions adopt increasing the diameter of the crystallizing wheel, increasing the cross-sectional area of the ingot, and increasing the rough rolling mill. However, this not only increases the equipment investment but also increases the energy consumption, and the cost is relatively high. Summary of the Invention

[0004] The purpose of the present invention is to provide an efficient wheel type casting machine and its supporting casting method. By setting a first pressing wheel to closely adhere the steel belt to the crystallizing wheel groove, preventing the leakage of the molten metal after casting, and setting a second pressing wheel to cooperate with the ingot lifter to lead the ingot out of the cavity to the wheel type channel, and directly cooling the ingot by using the cooling system, it is possible to avoid the large heat transfer resistance caused by the shrinkage of the billet shell and the generation of gaps with the crystallizing wheel and the steel belt, which can significantly improve the cooling efficiency and thus increase the output. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An efficient wheel type casting machine, including a crystallizing wheel, a steel belt, a conveying channel, and a pressing wheel for pressing the crystallizing wheel, wherein:

[0007] The crystallizing wheel is provided with an inwardly concave crystallizing wheel groove,

[0008] The steel belt is installed on the steel belt tensioning wheel, tightened by the steel belt wheel and bypasses the pressing wheel. A part of the crystallizing wheel groove is in close contact with the steel belt through the pressing wheel, forming a cavity extending along the circumferential direction of the crystallizing wheel. The feeding port of the cavity is the gate. It further includes a cooling system for cooling the ingot, wherein: an ingot lifting device for leading out the ingot is arranged in the cavity, a wheel-shaped channel communicating with the cavity is arranged beside the ingot lifting device, and an ingot traction device is arranged at the connection of the wheel-shaped channel and the conveying channel.

[0009] Optionally or preferably, the wheel-shaped channel is of an arc structure.

[0010] Optionally or preferably, the pressing wheel includes a first pressing wheel arranged at the gate and a second pressing wheel arranged above the ingot lifting device. The first pressing wheel, the second pressing wheel and the steel belt tensioning wheel are all connected with cylinders.

[0011] Optionally or preferably, an anti-offset device is arranged between the first pressing wheel and the cylinder. The anti-offset device includes a pressing arm, a driving arm and a pressing shaft. One end of the pressing shaft is installed on the pressing arm, and the other end is installed on the driving arm. The pressing arm and the pressing shaft are connected by a floating shaft.

[0012] Optionally or preferably, the ingot traction device includes an ingot traction wheel moving synchronously with the ingot and an ingot pressing wheel. A synchronous chain connecting with the crystallizing wheel is wound around the ingot traction wheel, and one end of the ingot pressing wheel is connected with a traction cylinder.

[0013] Optionally or preferably, a plurality of conveying wheels are uniformly arranged along the circumferential direction in the conveying channel.

[0014] Optionally or preferably, the cooling system is installed on the wheel-shaped channel and includes a plurality of water spraying devices for cooling the periphery of the ingot.

[0015] Based on the above technical solutions, the following technical effects can be produced:

[0016] In the present invention, the first pressing wheel is arranged to make the steel belt in close contact with the crystallizing wheel groove, preventing the leakage of the molten metal after casting. The second pressing wheel cooperates with the ingot lifting device to lead the ingot out of the cavity to the wheel-shaped channel. The cooling system is used to directly cool the ingot, avoiding the formation of gaps between the crystallizing wheel and the steel belt due to the shrinkage of the billet shell, which results in a large heat transfer resistance. This can significantly improve the cooling efficiency, thereby increasing the output. A floating shaft is added between the pressing arm and the pressing shaft, increasing a rotational degree of freedom for the pressing arm. The pressing wheel is automatically adjusted through the floating shaft to keep its axis parallel to the axis of the crystallizing wheel, ensuring close contact between the crystallizing wheel and the steel belt and preventing the leakage of molten metal. The arranged traction cylinder makes the ingot pressing wheel press the ingot against the traction wheel, enabling the ingot to enter the conveying channel. It replaces manual operation, saving time and effort. It solves the technical problems of the low production efficiency and high improvement cost of the current wheel-type casting machine.

[0017] The present invention also provides a casting method for a high-efficiency wheeled casting machine, which is based on the above-mentioned high-efficiency wheeled casting machine and includes the following steps:

[0018] Pour the molten metal into the cavity formed by the crystallization wheel groove and the steel belt through the gate for casting.

[0019] Use the ingot lifter to introduce the ingot with a certain thickness of shell into the wheeled channel.

[0020] Under the drive of the crystallization wheel and the self-weight of the ingot, the ingot reaches the bottom of the wheeled channel through the cooling system.

[0021] The traction cylinder drives the ingot pressing wheel to press the ingot against the ingot traction wheel, so that the ingot enters the conveying channel.

[0022] After the ingot enters the conveying channel, use the bridging to lift the ingot along the conveying wheel to the continuous rolling mill for rolling.

[0023] The casting method for the high-efficiency wheeled casting machine provided by the present invention only needs to install a wheeled channel on the existing wheeled casting machine, and the cost is relatively low, which can significantly improve the productivity of the ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is Figure 1 the schematic cross-sectional structure diagram of B-B in;

[0026] Figure 3 is the cross-sectional structure diagram of the crystallization wheel groove;

[0027] Figure 4 is the structural diagram of the cooling system and the conveying channel;

[0028] In the figure: 1, crystallization wheel; 2, steel belt; 3, conveying channel; 4, crystallization wheel groove; 5, steel belt tensioning wheel; 6, steel belt wheel; 7, synchronous chain; 8, gate; 9, ingot lifter; 10, wheeled channel; 11, pressing wheel 1; 12, pressing wheel 2; 13, cylinder; 14, pressing arm; 15, active arm; 16, pressing shaft; 17, floating shaft; 18, ingot traction wheel; 19, ingot pressing wheel; 20, traction cylinder; 21, conveying wheel; 22, water spraying device. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following further describes the present invention with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0030] As Figures 1-4 shown:

[0031] The present invention provides an efficient wheel casting machine, which includes a crystallization wheel 1, a steel belt 2, a conveying channel 3, and a pressing wheel for pressing the crystallization wheel 1. An inwardly concave crystallization wheel groove 4 is formed on the crystallization wheel 1. The steel belt 2 is installed on a steel belt tensioning wheel 5, tightened by a steel belt wheel 6 and bypasses the pressing wheel. A part of the crystallization wheel groove 4 is in close contact with the steel belt 2 through the pressing wheel to form a cavity extending along the circumferential direction of the crystallization wheel 1. The feeding port of the cavity is the pouring gate 8. The machine further includes a cooling system for cooling the crystallization wheel, the steel belt wheel, and the ingot. Wherein: An ingot lifting device 9 for leading out the ingot is arranged in the cavity. A wheel-shaped channel 10 communicating with the cavity is arranged beside the ingot lifting device 9. An ingot traction device is arranged at the connection of the wheel-shaped channel 10 and the conveying channel 3.

[0032] As an optional implementation manner, the wheel-shaped channel 10 is of an arc structure.

[0033] As an optional implementation manner, the pressing wheel includes a first pressing wheel 11 arranged at the pouring gate 8 and a second pressing wheel 12 arranged above the ingot lifting device 9. The first pressing wheel 11, the second pressing wheel 12, and the steel belt tensioning wheel 5 are all connected with a cylinder 13.

[0034] As an optional implementation manner, an anti-offset device is arranged between the first pressing wheel 11 and the cylinder 13. The anti-offset device includes a pressing arm 14, a driving arm 15, and a pressing shaft 16. One end of the pressing shaft 16 is installed on the pressing arm 14, and the other end is installed on the driving arm 15. The pressing arm 14 and the pressing shaft 16 are connected through a floating shaft 17.

[0035] As an optional implementation manner, the ingot traction device includes an ingot traction wheel 18 that moves synchronously with the ingot and an ingot pressing wheel 19. A synchronous chain 7 connected to the crystallization wheel 1 is wound around the ingot traction wheel 18. One end of the ingot pressing wheel 19 is connected with a traction cylinder 20.

[0036] As an optional implementation manner, a plurality of conveying wheels 21 are uniformly arranged along the circumferential direction in the conveying channel 3.

[0037] As an optional implementation manner, the cooling system is installed on the wheel-shaped channel 10 and includes a plurality of water spraying devices 22 for cooling the periphery of the ingot.

[0038] The present invention also provides a casting method for supporting the efficient wheel casting machine. Based on the above-mentioned efficient wheel casting machine, it is characterized in that it includes the following steps:

[0039] Pour the molten metal into the cavity formed by the crystallization wheel groove 4 and the steel belt 2 through the pouring gate 8 for casting.

[0040] Use the ingot lifting device 9 to introduce the ingot with a certain thickness of shell into the wheel-shaped channel 10.

[0041] Under the drive of the crystallization wheel 1 and the self-weight of the ingot, the ingot reaches the bottom of the wheel channel 10 through the cooling system.

[0042] The traction cylinder 20 drives the ingot pressing wheel 19 to press the ingot against the ingot traction wheel 18, so that the ingot enters the conveying channel 3.

[0043] After the ingot enters the conveying channel 3, the ingot is lifted along the conveying wheel 21 to the continuous rolling mill for rolling by using the approach bridge.

Claims

1. An efficient wheel casting machine, comprising a crystallizing wheel (1), a steel belt (2), a conveying channel (3), and a pressing wheel for pressing the crystallizing wheel (1). The crystallizing wheel (1) is provided with an inwardly concave crystallizing wheel groove (4). The steel belt (2) is installed on a steel belt tensioning wheel (5), tightened by a steel belt wheel (6) and bypasses the pressing wheel. A part of the crystallizing wheel groove (4) is in close contact with the steel belt (2) through the pressing wheel to form a cavity extending along the circumferential direction of the crystallizing wheel (1), and the feed inlet of the cavity is the gate (8). It further comprises a cooling system for cooling the ingot, characterized in that An ingot lifting device for leading out the ingot is arranged in the cavity, a wheel-shaped channel (10) communicated with the cavity is arranged beside the ingot lifting device (9), the ingot lifting device (9) is located at the inlet of the wheel-shaped channel (10), and the ingot with a certain thickness of shell is led into the wheel-shaped channel (10) by the ingot lifting device (9) for cooling; A casting ingot traction device is arranged at the connection between the wheel-shaped channel (10) and the conveying channel (3); The cooling system is installed on the wheel-shaped channel (10) and comprises a plurality of water spraying devices (22) for cooling the periphery of the ingot.

2. An efficient wheel type casting machine according to claim 1, characterized in that: The wheel-shaped channel (10) is of an arc-shaped structure.

3. An efficient wheel type casting machine according to claim 1, characterized in that: The pressing wheel comprises a first pressing wheel (11) arranged at the gate (8) and a second pressing wheel (12) arranged above the ingot lifting device (9), and the first pressing wheel (11), the second pressing wheel (12) and the steel belt tensioning wheel (5) are all connected with a cylinder (13).

4. An efficient wheel-type casting machine according to claim 1, characterized in that: An anti-offset device is arranged between the first pressing wheel (11) and the cylinder (13), and the anti-offset device comprises a pressing arm (14), a driving arm (15) and a pressing shaft (16). One end of the pressing shaft (16) is installed on the pressing arm (14), and the other end is installed on the driving arm (15). The pressing arm (14) and the pressing shaft (16) are connected by a floating shaft (17).

5. An efficient wheel-type casting machine according to claim 1, characterized in that: The casting ingot traction device comprises a casting ingot traction wheel (18) moving synchronously with the ingot and a casting ingot pressing wheel (19). A synchronous chain (7) connected with the crystallizing wheel (1) is wound around the casting ingot traction wheel (18), and one end of the casting ingot pressing wheel (19) is connected with a traction cylinder (20).

6. An efficient wheel-type casting machine according to claim 1, characterized in that: A plurality of conveying wheels (21) are uniformly arranged along the circumferential direction in the conveying channel (3).

7. A casting method for supporting an efficient wheel casting machine, based on the efficient wheel casting machine according to any one of claims 1-6, characterized in that The ingot with a certain thickness of shell is led into the wheel-shaped channel (10) by the ingot lifting device (9). Under the drive of the crystallizing wheel (1) and the self-weight of the ingot, the ingot reaches the bottom of the wheel-shaped channel (10) through the cooling system. The traction cylinder (20) drives the casting ingot pressing wheel (19) to press the ingot against the casting ingot traction wheel (18), so that the ingot enters the conveying channel (3).

8. The casting method for supporting an efficient wheeled casting machine according to claim 7, characterized in that : It further comprises that before ingot lifting, the molten metal is placed into the cavity formed by the crystallizing wheel groove (4) and the steel belt (2) through the gate (8) for casting.

9. An efficient wheeled casting machine supporting casting method according to claim 7, characterized in that : It further comprises that after the ingot enters the conveying channel (3), the ingot is lifted along the conveying wheel (21) to the continuous rolling mill for forming by using a bridging device.

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