An aluminum alloy quenching furnace based on reconstruction of a box-type tempering furnace with built-in water tank

Abstract

The utility model discloses a kind of aluminum alloy quenching furnace based on built-in sink box-type tempering furnace reconstruction, including water tank motor main circuit and water tank motor starting control circuit, parallel a water tank motor starting branch isolated by relay on water tank motor starting control circuit, starting switch and safety switch are installed on water tank motor starting branch, water tank motor can be started in manual operation mode by starting switch button. The utility model is installed starting switch and safety switch on water tank motor starting branch, water tank motor can be started in manual operation mode by starting switch button, on the basis of material frame transfer time≤20 seconds, cooling water circulation stirring, satisfy aluminum alloy quenching requirement.

Description

Technical Field

[0001] This utility model relates to an aluminum alloy quenching furnace based on a modified built-in water tank box-type tempering furnace. Background Technology

[0002] Aluminum alloys can be classified into heat-treatable and non-heat-treatable aluminum alloys based on whether there are changes in solute solubility. The main strengthening method for heat-treatable aluminum alloys is quenching (also known as solution treatment) + aging treatment. Heat-treatable aluminum alloys generally have multiple strengthening phases, and the dissolution and overheating temperatures of these phases are not entirely the same. To ensure a uniform and consistent strengthening effect, the heating equipment must have good heat preservation accuracy, and the cooling medium should have a high cooling rate and good heat exchange conditions. The box-type tempering furnace (with built-in water tank and PLC program control) matched with the controlled atmosphere multi-purpose furnace can generally maintain a stable heat preservation accuracy of ≤±5℃, meeting the heat preservation accuracy requirements of heating equipment for aluminum alloy solution and aging treatments. However, this equipment is designed for water cooling after tempering of steel parts. It uses automatic control from the time the material frame is ejected from the furnace to the time it enters the water. The program executes the process of opening the door → ejecting the material frame → pushing the rod back (aligning the material frame) → closing the door → quenching. The entire program takes about 40 seconds, which cannot meet the requirement of a quenching transfer time of ≤20 seconds for aluminum alloys (parts with an effective wall thickness ≥6.5mm). Using manual control for material frame transfer only requires executing the process of opening the door → ejecting the material frame → closing the door → quenching. Because the alignment process for the material frame is reduced, the time from ejection from the furnace to entry into the water can be reduced to less than 20 seconds. However, in this state, the stirring motor of the water tank will stop working, making it difficult to guarantee the consistency of heat treatment quality during large-scale quenching production of aluminum alloys. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an aluminum alloy quenching furnace with a simple structure and reliable operation, which is based on the modification of a built-in water tank box-type tempering furnace.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: an aluminum alloy quenching furnace based on the modification of a built-in water tank box-type tempering furnace, including a water tank motor main circuit and a water tank motor start control circuit. A water tank motor start branch circuit isolated by a relay is connected in parallel on the water tank motor start control circuit. A start switch and a safety switch are installed on the water tank motor start branch circuit. The water tank motor can be started in manual operation mode by pressing the start switch button. The cooling water is circulated and stirred while the material frame transfer time is ≤20 seconds, which meets the requirements of aluminum alloy quenching.

[0005] The aluminum alloy quenching furnace described above is based on a modified built-in water tank box-type tempering furnace. The main circuit of the water tank motor includes a three-phase power supply, a fuse, a normally open contact of a contactor, and a water tank motor connected in sequence.

[0006] The aluminum alloy quenching furnace described above, which is based on a modified built-in water tank box-type tempering furnace, includes a water tank motor start control circuit consisting of a power supply, a PLC output terminal, and a contactor coil connected in sequence.

[0007] The aluminum alloy quenching furnace described above, which is based on the modification of the built-in water tank box-type tempering furnace, has one end of the start switch connected to the power supply and the other end connected to the coil of the relay. The power supply is connected to the contactor coil after passing through the safety switch and the normally open contact of the relay in sequence.

[0008] The aluminum alloy quenching furnace described above is based on a modified box-type tempering furnace with an internal water tank. The emergency stop, safety interlock, and stop functions of the original PLC-controlled box-type tempering furnace are still connected in series in the water tank motor start control circuit.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. This utility model connects a water tank motor starting branch circuit isolated by a relay in parallel with the water tank motor starting control circuit. The water tank motor starting branch circuit is equipped with a start switch and a safety switch. The water tank motor can be started in manual operation mode by pressing the start switch button. The cooling water is circulated and stirred while the material frame transfer time is ≤20 seconds, which meets the requirements of aluminum alloy quenching.

[0011] 2. The cost of this utility model modification is low; the cost of components such as relays, safety switches, start switches, and cables, plus labor, is only about 1,000 yuan. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a box-type tempering furnace.

[0013] Figure 2 This is a structural block diagram of the present invention.

[0014] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, the box-type tempering furnace includes a heating chamber 1, an air-cooled chamber 2, and a water-cooled chamber 3, with a water tank motor 4 installed in the water-cooled chamber 3.

[0017] like Figure 2 , Figure 3As shown, an aluminum alloy quenching furnace based on a modified box-type tempering furnace with an internal water tank includes a main circuit for the water tank motor and a water tank motor start control circuit. After determining the access point of the box-type tempering furnace branch, standardizing the wiring, and completing the risk assessment and full-function testing, a water tank motor start branch circuit 9 isolated by a relay 5 is connected in parallel to the water tank motor start control circuit. A start switch 6 and a safety switch 7 are installed on the water tank motor start branch circuit 9. The water tank motor 4 can be started in manual operation mode by pressing the start switch 6 button. The cooling water is circulated and stirred while the material frame transfer time is ≤20 seconds, which meets the requirements of aluminum alloy quenching.

[0018] The main circuit of the water tank motor includes a three-phase power supply, a fuse, a normally open contactor contact, and the water tank motor connected in sequence. The starting control circuit of the water tank motor includes a power supply, a PLC output terminal 8, and a contactor coil connected in sequence.

[0019] One end of the start switch 6 is connected to the power supply, and the other end is connected to the coil L1 of the relay. The power supply is connected to the contactor coil via the safety switch 7 and the normally open contact K1 of the relay. The emergency stop, safety interlock, and stop functions of the original PLC control of the box-type tempering furnace are still connected in series in the water tank motor start control circuit.

[0020] This invention connects a relay-isolated water tank motor starting branch in parallel to the water tank motor starting control circuit. A start switch 6 and a safety switch 7 are installed on this branch. The water tank motor can be started manually via the start switch 6. With a material frame transfer time of ≤20 seconds, cooling water is circulated and stirred to meet the requirements for aluminum alloy quenching. This invention requires minimal investment; the cost of components such as the relay, safety switch 7, start switch 6, and cables, plus labor, is only around 1000 yuan.

Claims

1. An aluminum alloy quenching furnace based on a modified built-in water tank box-type tempering furnace, comprising a water tank motor main circuit and a water tank motor start control circuit, characterized in that: A water tank motor starting branch circuit isolated by a relay is connected in parallel to the water tank motor starting control circuit. A start switch and a safety switch are installed on the water tank motor starting branch circuit. The water tank motor can be started in manual operation mode by pressing the start switch button. The cooling water is circulated and stirred on the basis of material frame transfer time ≤20 seconds to meet the quenching requirements of aluminum alloy.

2. The aluminum alloy quenching furnace based on the modified built-in water tank box-type tempering furnace according to claim 1, characterized in that: The main circuit of the water tank motor includes a three-phase power supply, a fuse, a normally open contactor contactor, and the water tank motor connected in sequence.

3. The aluminum alloy quenching furnace based on the modification of a built-in water tank box-type tempering furnace according to claim 2, characterized in that: The water tank motor start control circuit includes a power supply, a PLC output terminal, and a contactor coil connected in sequence.

4. The aluminum alloy quenching furnace based on the modified built-in water tank box-type tempering furnace according to claim 3, characterized in that: One end of the start switch is connected to the power supply, and the other end of the start switch is connected to the coil of the relay. The power supply passes through the safety switch and the normally open contact of the relay in sequence before connecting to the contactor coil.

5. The aluminum alloy quenching furnace based on the modified built-in water tank box-type tempering furnace according to claim 1, characterized in that: The emergency stop, safety interlock, and stop functions of the original PLC control for the box-type tempering furnace are still connected in series in the water tank motor start control circuit.

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