阅读说明：本技术 一种无中孔发热盘的离心浇铸方法 (Centrifugal casting method of heating disc without middle hole ) 是由 宋有军 刘磊 于 2019-10-17 设计创作，主要内容包括：一种无中孔发热盘的离心浇铸方法,涉及电器配件制造技术领域,解决了目前无法自动化生产实心发热盘的技术问题。本发明提供的一种无中孔发热盘的离心浇铸方法,包括以下步骤：步骤S1：准备发热管,离心浇铸模具,四工位离心浇铸机,四联杆自动给汤机,以及高温铝液；步骤S2:第一次注汤准备；步骤S3：第一次注汤；步骤S4：第一次固化；步骤S5：降速、第二次注汤；步骤S6：第二次固化；步骤S7：停机冷却。(a centrifugal casting method of a heating disc without a central hole relates to the technical field of electric appliance accessory manufacturing, and solves the technical problem that a solid heating disc cannot be automatically produced at present. The invention provides a centrifugal casting method of a heating disc without a central hole, which comprises the following steps: step S1: preparing a heating tube, a centrifugal casting die, a four-station centrifugal casting machine, a four-link automatic feeding machine and high-temperature aluminum liquid; step S2, preparing soup for the first time; step S3: injecting the soup for the first time; step S4: curing for the first time; step S5: reducing the speed and pouring the soup for the second time; step S6: curing for the second time; step S7: and stopping the machine for cooling.)

1. A centrifugal casting method of a heating plate without a middle hole is characterized in that: the method comprises the following steps:

Step S1: preparing a heating tube, a centrifugal casting mold, a four-station centrifugal casting machine, a four-link automatic soup feeder and high-temperature aluminum liquid, wherein the centrifugal casting mold is provided with a mold cover, the four-station centrifugal casting machine is provided with an automatic soup injection mechanical arm, and the four-station centrifugal casting machine is provided with a casting station and a cooling station;

Step S2: preparing for pouring soup for the first time, namely filling the heating tube into a centrifugal casting die, covering a die cover, starting a four-station centrifugal casting machine, accelerating the centrifugal casting die to a first centrifugal casting speed while transferring the centrifugal casting die to a casting station, and taking a proper amount of high-temperature aluminum liquid by an automatic soup pouring manipulator to stand by at a casting opening;

Step S3: injecting the high-temperature aluminum liquid into a centrifugal casting die by an automatic liquid injection manipulator for the first time;

Step S4: performing primary solidification, namely after injecting high-temperature aluminum liquid in the step S3, keeping the rotating speed of the centrifugal casting mold in the step S2 for 1.5-2.5 seconds;

Step S5: reducing the speed, pouring the molten aluminum for the second time, reducing the rotating speed of the centrifugal casting mold to a second centrifugal casting speed, and simultaneously pouring the residual high-temperature molten aluminum in the step S3 into the centrifugal casting mold;

Step S6: performing second curing, namely operating the centrifugal casting mold at the second centrifugal casting speed of the step S5, and keeping the centrifugal casting mold in a micro-weight loss state for curing for 3-4.5 seconds;

step S7: stopping the machine for cooling, transferring the centrifugal casting mould to a cooling station, and braking and stopping the centrifugal casting mould and forcibly cooling.

2. A centrifugal casting method of a non-mesoporous heating disk according to claim 1, characterized in that: the first centrifugal casting speed is 1300-1800 r/min.

3. a centrifugal casting method of a non-mesoporous heating disk according to claim 1, characterized in that: the second centrifugal casting speed is 350-450 r/min.

4. A centrifugal casting method of a non-mesoporous heating disk according to claim 1, characterized in that: the second soup-pouring speed in the step S5 is faster than the first soup-pouring speed in the step S3.

5. a centrifugal casting method of a non-mesoporous heating disk according to claim 1, characterized in that: in step S7, the braking method of the centrifugal casting mold during the shutdown cooling is electromagnetic braking.

6. A centrifugal casting method of a non-mesoporous heating disk according to claim 1, characterized in that: in step S7, the forced cooling in the stop cooling is either air cooling or water cooling.

Technical Field

The invention relates to the technical field of manufacturing of electric fittings, in particular to a centrifugal casting method of a heating disc without a central hole.

Background

the heating plate is a heating device of household appliances such as an electric cooker, an electric pressure cooker, an electric oven and the like, and is generally formed by die casting or casting after alloy aluminum is melted at high temperature. The die casting process is rarely adopted in the manufacture of the heating disc of the small household appliance due to high cost. The casting process is classified into centrifugal casting and gravity casting, and the latter is gradually eliminated due to low production efficiency. The centrifugal casting process is generally adopted in the manufacture of small household appliance heating discs due to low manufacturing cost and high production efficiency. However, centrifugal casting is a hollow revolving body casting because of its own technological characteristics.

When some solid heating plates are required to be produced, the prior industry generally adopts a method of gravity casting with low efficiency or a method of firstly manufacturing a hollow structure and then inlaying and repairing, and the two methods can not realize automatic production.

Disclosure of Invention

In view of the above, the present invention provides a centrifugal casting method of a non-mesopore heating plate, which can solve the above technical problems.

a centrifugal casting method of a heating plate without a middle hole comprises the following steps:

Step S1: preparing a heating tube, a centrifugal casting mold, a four-station centrifugal casting machine, a four-link automatic soup feeder and high-temperature aluminum liquid, wherein the centrifugal casting mold is provided with a mold cover, the four-station centrifugal casting machine is provided with an automatic soup injection mechanical arm, and the four-station centrifugal casting machine is provided with a casting station and a cooling station;

Step S2: preparing for pouring soup for the first time, namely filling the heating tube into a centrifugal casting die, covering a die cover, starting a four-station centrifugal casting machine, accelerating the centrifugal casting die to a first centrifugal casting speed while transferring the centrifugal casting die to a casting station, and taking a proper amount of high-temperature aluminum liquid by an automatic soup pouring manipulator to stand by at a casting opening;

Step S3: injecting the high-temperature aluminum liquid into a centrifugal casting die by an automatic liquid injection manipulator for the first time;

step S4: performing primary solidification, namely after injecting high-temperature aluminum liquid in the step S3, keeping the rotating speed of the centrifugal casting mold in the step S2 for 1.5-2.5 seconds;

step S5: reducing the speed, pouring the molten aluminum for the second time, reducing the rotating speed of the centrifugal casting mold to a second centrifugal casting speed, and simultaneously pouring the residual high-temperature molten aluminum in the step S3 into the centrifugal casting mold;

Step S6: performing second curing, namely operating the centrifugal casting mold at the second centrifugal casting speed of the step S5, and keeping the centrifugal casting mold in a micro-weight loss state for curing for 3-4.5 seconds;

Step S7: stopping the machine for cooling, transferring the centrifugal casting mould to a cooling station, and braking and stopping the centrifugal casting mould and forcibly cooling.

further, the first centrifugal casting speed is 1300-1800 r/min.

Further, the second centrifugal casting speed is 350-450 r/min.

Further, the second soup-pouring speed in the step S5 is faster than the first soup-pouring speed in the step S3.

Further, in step S7, the braking method of the centrifugal casting mold during the stop cooling is electromagnetic braking.

In step S7, the forced cooling in the stop cooling is either air cooling or water cooling.

compared with the prior art, the centrifugal casting method of the heating disc without the middle hole has the beneficial effects that: the method adopts the centrifugal casting method of twice soup injection to realize the processing and manufacturing of the solid casting, the center structure of the product is compact without air holes by keeping the micro-weightlessness state solidification after speed reduction, the production flow is automatically controlled, the labor intensity of workers is low, the operation is simple, the production efficiency is high, and the manufacturing cost is low.

drawings

embodiments of the invention are described below with reference to the accompanying drawings, in which:

Fig. 1 is a flow chart of a centrifugal casting method of a heating disc without a central hole provided by the invention.

Detailed Description

Specific embodiments of the present invention will be described in further detail below based on the drawings. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

please refer to fig. 1, which is a flowchart of a centrifugal casting method for a heating plate without a central hole according to the present invention. A centrifugal casting method of a heating plate without a middle hole comprises the following steps:

Step S1: preparing a heating tube, a centrifugal casting mold, a four-station centrifugal casting machine, a four-link automatic soup feeder and high-temperature aluminum liquid, wherein the centrifugal casting mold is provided with a mold cover, the four-station centrifugal casting machine is provided with an automatic soup injection mechanical arm, and the four-station centrifugal casting machine is provided with a casting station and a cooling station;

Step S2: preparing for pouring soup for the first time, namely filling the heating tube into a centrifugal casting die, covering a die cover, starting a four-station centrifugal casting machine, accelerating the centrifugal casting die to a first centrifugal casting speed while transferring the centrifugal casting die to a casting station, and taking a proper amount of high-temperature aluminum liquid by an automatic soup pouring manipulator to stand by at a casting opening;

step S3: injecting the high-temperature aluminum liquid into a centrifugal casting die by an automatic liquid injection manipulator for the first time;

Step S4: performing primary solidification, namely after injecting high-temperature aluminum liquid in the step S3, keeping the rotating speed of the centrifugal casting mold in the step S2 for 1.5-2.5 seconds;

Step S5: reducing the speed, pouring the molten aluminum for the second time, reducing the rotating speed of the centrifugal casting mold to a second centrifugal casting speed, and simultaneously pouring the residual high-temperature molten aluminum in the step S3 into the centrifugal casting mold;

step S6: performing second curing, namely operating the centrifugal casting mold at the second centrifugal casting speed of the step S5, and keeping the centrifugal casting mold in a micro-weight loss state for curing for 3-4.5 seconds;

step S7: stopping the machine for cooling, transferring the centrifugal casting mould to a cooling station, and braking and stopping the centrifugal casting mould and forcibly cooling.

in the step S2, 90% -95% of the high-temperature aluminum liquid is poured into the centrifugal casting mold by the automatic molten aluminum pouring manipulator, and then the rest high-temperature aluminum liquid is poured into the centrifugal casting mold in the step S5, so that the high-temperature aluminum liquid is prevented from being distributed around the centrifugal mold in a hollow rotary manner due to the centrifugal force after the high-temperature aluminum liquid is poured at one time, and the solid casting is processed and manufactured.

The second soup-pouring speed in the above step S5 is faster than the first soup-pouring speed in the step S3. The speed of the second pouring of the liquid is faster than that of the first pouring of the liquid, so that the aluminum liquid in the centrifugal casting mold can be prevented from being completely solidified to form a fault.

in the step S6, after the centrifugal casting speed is decreased from the first centrifugal casting speed to the second centrifugal casting speed, the high-temperature aluminum liquid is in a micro-weightless state, that is, the centrifugal force is slightly greater than the gravity, so that the high-temperature aluminum liquid can better exhaust air and improve the quality of the cast product in this state, and the high-temperature aluminum liquid in the micro-weightless state cannot be thrown away due to the excessive centrifugal force, so that the central structure of the cast product is compact and has no air holes.

in step S7, the braking method of the centrifugal casting mold during the stop cooling is electromagnetic braking. Electromagnetic braking mainly plays a role in transmitting power, controlling movement and the like in a mechanical transmission system. The device has the advantages of compact structure, simple operation, sensitive response, reliable use, easy realization of remote control and the like.

In step S7, the forced cooling in the stop cooling is either air cooling or water cooling. The air-cooling is to cool the centrifugal casting mold by blowing a high-speed air flow or compressed air from a fan. The water-cooling is to spray certain atomized tap water on the centrifugal casting mold to cool the centrifugal casting mold.

in this embodiment, the automatic soup pouring manipulator automatically returns to take soup for the next pouring after finishing the first and second pouring.

compared with the prior art, the centrifugal casting method of the heating disc without the middle hole has the beneficial effects that: the method adopts the centrifugal casting method of twice soup injection to realize the processing and manufacturing of the solid casting, the center structure of the product is compact without air holes by keeping the micro-weightlessness state solidification after speed reduction, the production flow is automatically controlled, the labor intensity of workers is low, the operation is simple, the production efficiency is high, and the manufacturing cost is low.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.