Wheel hub die casting aluminum liquid prevention device

Abstract

The present invention discloses a wheel hub die-casting device for preventing aluminum liquid from escaping, which belongs to the field of wheel hub manufacturing. In the present invention, when aluminum escaping does not occur, the aluminum escaping prevention wire surrounds the mold. When aluminum escaping occurs, the aluminum liquid scalds the insulation skin of the aluminum escaping prevention wire and contacts the internal wire. The internal wire is connected to the ground 0V voltage and transmitted to the aluminum overflow input contact. The 0V voltage of the aluminum overflow input contact and the common end 24V voltage form a voltage drop circuit, and the aluminum overflow input contact is effectively triggered due to the low level. Under the action of the input signal, the aluminum overflow pressure relief contact of the PLC module outputs a signal to the signal input end of the furnace exhaust valve, and the furnace exhaust valve opens, and the furnace body is quickly depressurized. The present invention greatly reduces the injection energy and injection range of aluminum liquid, and effectively ensures the safety of the staff. At the same time, the present invention also effectively avoids the damage caused by aluminum escaping to the peripheral equipment. Therefore, the present invention has the characteristics of ensuring the safety of the staff and the equipment.

Description

Technical Field

[0001] The invention relates to the field of wheel hub manufacturing, in particular to a wheel hub die-casting aluminum liquid anti-escape device. Background Art

[0002] In the manufacture of aluminum alloy wheels for automobiles, the most widely used process is die casting. The die casting process is to press the liquid aluminum in the furnace into the inside of the wheel mold, and then form the wheel through air cooling and water cooling. Figure 1 As shown, the mold is fixed on the top of the furnace body, and a liquid riser is designed between the upper opening of the furnace body filled with aluminum liquid and the lower opening of the mold. The lower part of the liquid riser passes through the furnace chamber and extends to the bottom of the furnace body and leaves a certain distance from the bottom of the furnace body. The furnace body adopts a sealed structure design. When working, the inside of the furnace body is pressurized, and the aluminum liquid is squeezed into the liquid riser and into the mold under the action of pressure. The aluminum liquid in the mold is then cooled by air and water to form a wheel hub blank.

[0003] The wheel hub mold is not an integrated structure. Figure 1 As shown, it includes upper and lower plates, and four side molds of front, rear, left and right. Each part of the mold can be telescopically moved under the drive of the oil cylinder. When die-casting the wheel hub, the oil cylinders of the six parts move forward and push together to form a mold sealing structure with a gap in the middle for the wheel hub. After the die-casting is completed, the oil cylinder retreats, and the six parts are separated. The wheel hub is brought upward by the upper plate to complete the die-casting. In the prior art, when the aluminum liquid is pressed into the mold and is not cooled and solidified, if there are gaps in the parts of the mold, the liquid aluminum will spray out directly in the gap (called overflow aluminum or aluminum runaway in industry). The temperature of the aluminum liquid during die-casting of the wheel hub is as high as 700 degrees Celsius. If it splashes onto the skin of a person, it will cause severe burns and burns, seriously threatening the safety of the staff. In addition, the sprayed aluminum liquid will also cause serious damage to the peripheral equipment of the mold. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a wheel hub die-casting aluminum liquid prevention device which can ensure the safety of workers and equipment.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A wheel hub die casting aluminum liquid anti-escape device, comprising an aluminum anti-escape wire, a PLC module, a furnace exhaust pipe and a furnace exhaust valve, wherein:

[0007] The anti-escape aluminum wire is a wire with an insulating skin, the input end of the PLC module is provided with a common end and an overflow aluminum input contact, the output end of the PLC module is provided with an overflow aluminum pressure relief contact, one end of the furnace exhaust pipe is connected to the furnace body, and the other end of the furnace exhaust pipe is provided with an exhaust port, and the furnace exhaust valve is an electromagnetic valve arranged on the furnace exhaust pipe and controls the on and off of the furnace exhaust pipe;

[0008] The anti-aluminum escape wire is arranged around the mold, and the conductive wire of the anti-aluminum escape wire is connected to the aluminum overflow input contact through an external conductive wire, so that the anti-aluminum escape wire is electrically connected to the aluminum overflow input contact, the common end is connected to a 24V power supply, and the aluminum overflow pressure relief contact is connected to the signal input end of the furnace exhaust valve through a conductive wire.

[0009] Furthermore, it comprises a mold air cooling solenoid valve, and the output end of the PLC module is provided with an overflow aluminum air cooling contact, and the overflow aluminum air cooling contact is connected to the signal input end of the mold air cooling solenoid valve through a wire.

[0010] Furthermore, it comprises a mold water cooling solenoid valve, and the output end of the PLC module is provided with an overflow aluminum water cooling contact, and the overflow aluminum water cooling contact is connected to the signal input end of the mold water cooling solenoid valve through a wire.

[0011] Furthermore, it includes an alarm buzzer, and the output end of the PLC module is provided with an aluminum overflow alarm contact, and the aluminum overflow alarm contact is connected to the signal input end of the alarm buzzer through a wire.

[0012] Furthermore, it includes an alarm indicator light, and the aluminum overflow alarm contact is connected to the signal input end of the alarm indicator light through a wire.

[0013] Furthermore, it comprises four nuts, which are respectively welded and fixed on the working surface of the mold at the four corners of the mold, and the anti-escape aluminum wire is passed through the four nuts and wound around the mold.

[0014] The embodiments of the present invention have the following beneficial effects:

[0015] In the present invention, when aluminum leakage does not occur, the anti-aluminum leakage wire surrounds the mold. When aluminum leakage occurs, the sprayed aluminum liquid contacts the anti-aluminum leakage wire, which will quickly burn open the insulation skin of the anti-aluminum leakage wire and contact the internal wire. When the aluminum liquid droplets encounter air and quickly solidify, the wire of the anti-aluminum leakage wire will be fixed to the ground. At this time, the wire of the anti-aluminum leakage wire is equivalent to accessing a 0V voltage signal. The wire of the anti-aluminum leakage wire inputs the 0V voltage signal to the aluminum overflow input contact through an external wire. Since the common end of the input terminal of the PLC module is connected to a 24V voltage, the low level of the aluminum overflow input contact is effectively triggered. Under the action of the input signal, the aluminum overflow pressure relief contact of the PLC module outputs a signal to the signal input end of the furnace exhaust valve. The furnace exhaust valve opens, and the furnace body is quickly depressurized.

[0016] After the pressure is released, the aluminum liquid changes from the spraying state to the slow overflowing state. The slowly overflowing aluminum liquid contacts the outside air and can be quickly solidified, and the overflowing state stops. The present invention greatly reduces the spraying energy and spraying range of the aluminum liquid, effectively ensuring the safety of the staff. At the same time, the present invention also effectively avoids the damage to the surrounding equipment caused by the aluminum leakage. Therefore, the present invention has the characteristics of ensuring the safety of the staff and the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a wheel hub die-casting machine;

[0018] Figure 2 This is a schematic structural diagram of an embodiment of a wheel hub die-casting aluminum liquid prevention device of the present invention;

[0019] Figure 3 A schematic diagram of a PLC input interface circuit known to those skilled in the art;

[0020] Figure 4 It is a schematic diagram of the winding of the anti-escape aluminum wire of the wheel hub die-casting anti-escape aluminum liquid device of the present invention;

[0021] Figure 5 It is a top view of the anti-escape aluminum wire winding of the wheel hub die-casting anti-escape aluminum liquid device of the present invention.

[0022] Figure markings: 1-anti-escape aluminum wire; 10-external wire; 2-PLC module; 21-input terminal; 211-common terminal; 212-aluminum overflow input contact; 22-output terminal; 221-aluminum overflow pressure relief contact; 3-furnace exhaust pipe; 31-exhaust port; 4-furnace exhaust valve; 5-nut. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides a wheel hub die casting aluminum liquid prevention device, such as Figure 2 As shown, it includes an anti-escape aluminum wire 1, a PLC module 2, a furnace exhaust pipe 3 and a furnace exhaust valve 4, wherein:

[0025] The anti-escape aluminum wire 1 is a wire with an insulating skin, the input end 21 of the PLC module 2 is provided with a common end 211 and an overflow aluminum input contact 212, the output end 22 of the PLC module 2 is provided with an overflow aluminum pressure relief contact 221, one end of the furnace exhaust pipe 3 is connected to the furnace body, the other end of the furnace exhaust pipe 3 is provided with an exhaust port 31, and the furnace exhaust valve 4 is a solenoid valve provided on the furnace exhaust pipe 3 and controlling the on and off of the furnace exhaust pipe 3;

[0026] The anti-escape aluminum wire 1 is arranged around the mold, such as Figure 4 and5 As shown, the wire of the anti-aluminum escape wire 1 is connected to the aluminum overflow input contact 212 through an external wire 10, so that the anti-aluminum escape wire 1 is electrically connected to the aluminum overflow input contact 212, the common end 211 is connected to a 24V power supply, and the aluminum overflow pressure relief contact 221 is connected to the signal input end of the furnace exhaust valve 4 through a wire.

[0027] In the present embodiment, when aluminum leakage does not occur, the anti-aluminum leakage wire 1 surrounds the mold. When aluminum leakage occurs, the sprayed aluminum liquid contacts the anti-aluminum leakage wire 1, which will quickly burn open the insulation skin of the anti-aluminum leakage wire 1 and contact the internal wire. When the aluminum liquid droplets encounter air and quickly solidify, the wire of the anti-aluminum leakage wire 1 will be fixed to the ground. At this time, the wire of the anti-aluminum leakage wire 1 is equivalent to accessing a 0V voltage signal. The wire of the anti-aluminum leakage wire 1 inputs the 0V voltage signal to the aluminum overflow input contact 212 through the external wire 10. Since the common end 211 of the input terminal of the PLC module 2 is connected to a 24V voltage, the aluminum overflow input contact 212 is effectively triggered at a low level. Under the action of the input signal, the aluminum overflow pressure relief contact 221 of the PLC module 2 outputs a signal to the signal input end of the furnace exhaust valve 4. The furnace exhaust valve 4 opens, and the furnace body is quickly depressurized.

[0028] After the pressure is released, the aluminum liquid changes from the spraying state to the slow overflowing state. The slowly overflowing aluminum liquid contacts the outside air and can be quickly solidified, and the overflowing state stops. The present invention greatly reduces the spraying energy and spraying range of the aluminum liquid, effectively ensuring the safety of the staff. At the same time, the present invention also effectively avoids the damage to the surrounding equipment caused by the aluminum leakage. Therefore, the present invention has the characteristics of ensuring the safety of the staff and the equipment.

[0029] In this embodiment, the following known technologies in the electrical field are required as support: the PLC input interface circuit adopts optical coupling isolation (to protect the internal components of the PLC), that is, the input terminal of the PLC module adopts a photoelectric coupling element to receive the trigger signal. In the first case, when the common terminal is 24V, the input trigger terminal is 0V, which is effective. Figure 3 As shown in the figure, the second type is that when the common terminal is 0V, the input trigger terminal is 24V, which is effective. The first technical principle is applied in this embodiment. In addition, in PLC programming, the causal relationship between the input contacts and the output contacts of the PLC is the basic application mode of the PLC module, which is also a well-known technology for those skilled in the art.

[0030] As an improvement of the above embodiment, it also includes a mold air cooling solenoid valve, and the output end 22 of the PLC module 2 is provided with an overflow aluminum air cooling contact, and the overflow aluminum air cooling contact is connected to the signal input end of the mold air cooling solenoid valve through a wire. In this improvement, the overflow aluminum input contact 212 is energized, triggering the overflow aluminum air cooling contact to output a signal to the mold air cooling solenoid valve, the mold air cooling solenoid valve is opened, and the mold air cooling is started. The aluminum liquid in the mold is quickly solidified, and the overflow aluminum stops, which further enhances the beneficial effects of the above embodiment.

[0031] In order to further shorten the solidification time of the aluminum liquid, any of the above embodiments further includes a mold water cooling solenoid valve, and the output end 22 of the PLC module 2 is provided with an overflow aluminum water cooling contact, which is connected to the signal input end of the mold water cooling solenoid valve through a wire. In this embodiment, the overflow aluminum input contact 212 is energized, triggering the overflow aluminum water cooling contact to output a signal to the mold water cooling solenoid valve, the mold water cooling solenoid valve is opened, and the mold water cooling is started. Under the simultaneous action of air cooling and water cooling, the solidification time of the aluminum liquid is further shortened, and the overflow aluminum phenomenon can be quickly stopped.

[0032] As a further improvement of the above embodiment, an alarm buzzer is also included. The alarm buzzer can be fixedly set on the die-casting machine table or the electrical cabinet. The output end 22 of the PLC module 2 is provided with an aluminum overflow alarm contact, and the aluminum overflow alarm contact is connected to the signal input end of the alarm buzzer through a wire. In this embodiment, after the aluminum overflow input contact 212 is energized, the aluminum overflow alarm contact is triggered to output a signal to the alarm buzzer, and the alarm buzzer sounds to prompt the staff to collect emergency measures.

[0033] Furthermore, the above embodiment also includes an alarm indicator light, and the aluminum overflow alarm contact is connected to the signal input end of the alarm indicator light through a wire. In this embodiment, after the aluminum overflow input contact 212 is energized, the aluminum overflow alarm contact also outputs a signal to the alarm indicator light, causing the alarm indicator light to flash, prompting the staff to quickly respond to the abnormal condition of the die-casting machine.

[0034] In order to fix the penetration position of the anti-runaway aluminum wire 1, Figure 4 and 5 As shown, the present invention further comprises four nuts 5, which are respectively welded and fixed on the working surface of the mold at the four corners of the mold, and the anti-escape aluminum wire 1 is passed through the four nuts 5 and wound around the mold.

[0035] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wheel hub die casting aluminum liquid prevention device, characterized in that: It includes anti-escape aluminum wire, PLC module, furnace exhaust pipe and furnace exhaust valve, including: The anti-escape aluminum wire is a wire with an insulating skin, the input end of the PLC module is provided with a common end and an overflow aluminum input contact, the output end of the PLC module is provided with an overflow aluminum pressure relief contact, one end of the furnace exhaust pipe is connected to the furnace body, and the other end of the furnace exhaust pipe is provided with an exhaust port, and the furnace exhaust valve is an electromagnetic valve arranged on the furnace exhaust pipe and controls the on and off of the furnace exhaust pipe; The anti-escape aluminum wire is arranged around the mold, and the wire of the anti-escape aluminum wire is connected to the overflow aluminum input contact through an external wire, so that the anti-escape aluminum wire is electrically connected to the overflow aluminum input contact, the common end is connected to a 24V power supply, and the overflow aluminum pressure relief contact is connected to the signal input end of the furnace exhaust valve through a wire; It also includes a mold air cooling solenoid valve, the output end of the PLC module is provided with an overflow aluminum air cooling contact, and the overflow aluminum air cooling contact is connected to the signal input end of the mold air cooling solenoid valve through a wire; It also includes a mold water cooling solenoid valve, the output end of the PLC module is provided with an overflow aluminum water cooling contact, and the overflow aluminum water cooling contact is connected to the signal input end of the mold water cooling solenoid valve through a wire; It also includes four nuts, which are respectively welded and fixed on the working surface of the mold at the four corners of the mold, and the anti-escape aluminum wire is passed through the four nuts and wound around the mold.

2. The wheel hub die casting aluminum liquid prevention device according to claim 1 is characterized in that: It comprises an alarm buzzer, and the output end of the PLC module is provided with an aluminum overflow alarm contact, and the aluminum overflow alarm contact is connected to the signal input end of the alarm buzzer through a wire.

3. The wheel hub die casting aluminum liquid prevention device according to claim 2 is characterized in that: It comprises an alarm indicator light, and the aluminum overflow alarm contact is connected to the signal input end of the alarm indicator light through a wire.

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