JPH071111A - Apparatus for manufacturing aluminum alloy-made wheel - Google Patents

Abstract

PURPOSE:To shorten a lead time by executing cutting of a feeder head, refining, machining and inspection after sequencial heat treatment, after casting a work. CONSTITUTION:Molten Al alloy 99 is supplied into a die 21 from a melting furnace 9 by an automatic molten metal supplying means 91. The molten metal is directionally solidified by a casting means 2. A semi-product like work 1 having fine crystal grains is taken out in the semi-cooling state, and solution treatment is executed to the work 1 in a solution treatment furnace 3. The work 1 is rapidly cooled with water, etc., in a quenching means 4. A sprue part and the feeder head part, etc., 11 are cut off by a cutting means 98. The work 1 subjected to the cutting treatment of the spure, etc., is temper-anneald, etc., in an aging furnace 5. Shot blast treatment is then applied to the surface of the work 1 with a hot blasting means 6. The work 1 after shot blast is machined by a machining means 7. To the work 1 after machining, the check of air leakage, etc., is executed by an immersion air-tight checking means 8. Thus, the casting cycle time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated manufacturing line (manufacturing device) for aluminum alloy wheels,
In particular, the present invention relates to an integrated production line in which heat treatment such as casting and solution heat treatment is continuously performed to shorten the heat treatment time and reduce the heat energy consumption required for the heat treatment.

[0002]

2. Description of the Related Art Conventionally, aluminum alloy wheels (aluminum wheels) are manufactured in a divided state such as a casting process, a heat treatment process, and a machining process, and each process is a batch process. That is what is being processed. Then, the work subjected to such batch processing is finally completed as a product by passing through each process.

[0003]

By the way, in the manufacturing method by the batch processing described above, there is a possibility that quality may vary from lot to lot, and the cycle time of the casting operation, the heat treatment time, etc. may become long, and However, there is a problem that productivity is not improved. Furthermore, in the above batch processing method, after casting, the work is cooled to some extent, and after the processing such as cutting of the sprue part and the riser part is performed,
There are problems such as loss of thermal energy and lengthening of heat treatment time, since heating for performing heat treatment again must be performed. Therefore, in order to solve such a problem, an aluminum wheel manufacturing line (manufacturing apparatus) was adopted in which the casting process and the heat treatment process were made continuous and the casting process to the machining process were made continuous and consistent. It is an object (problem) of the present invention to provide
Is.

[0004]

In order to solve the above-mentioned problems, the following measures are taken in the present invention. That is, regarding an integrated manufacturing line (manufacturing apparatus) of wheels made of aluminum alloy, a melting furnace for melting an ingot made of aluminum alloy, and an automatic hot water supply means for supplying molten metal of the aluminum alloy melted in the melting furnace into a mold. , A casting means comprising a die for receiving the molten metal from the automatic hot water feeding means and a tilt casting machine for sequentially and directionally solidifying the molten metal injected into the die, and so as to have fine crystal grains in the casting means. A semi-finished workpiece that has been cast in a semi-cooled state is taken out, and a solution heat treatment furnace for solution heat treating the work, and a quenching means for rapidly cooling the work heated in the solution heat treatment furnace with water or the like. And a sprue part / seed part cutting means for cutting the still sprue part, the riser part, etc. on the work that has been subjected to heat treatment such as quenching, and the sprue part / seed part cutting means. An aging furnace that tempers the work that has been cut at the sprue part and the riser part, and a shot blasting means that performs shot blasting on the surface of the work that has been tempered in the aging furnace. It is decided to adopt a configuration comprising a machining means for machining the shot blasted work and a submerged airtightness inspection means for checking the presence or absence of air leakage in the work subjected to each of the treatments.

[0005]

With the above construction, the following actions are exhibited in the present invention. First, in the melting step (a) of FIG. 1, the aluminum alloy ingot is melted in the melting furnace 9 to generate the molten metal 99.
This molten metal 99 is transferred to the mold 21 through the automatic hot water supply means 91 and the like.
Hot water is supplied inside (casting step (b) in FIG. 1). The work 1 formed (cast) in the die 21 in this manner is taken out by a robot or the like in a semi-cooled state, and is conveyed to the next solution heat treatment furnace 3 (solution heat treatment step (C)). It In this solution heat treatment furnace 3, a solution heat treatment is performed at a temperature of about 530 ° C. for about 3 hours. Then, the work 1 which has been subjected to the solution heat treatment is quenched and heat-treated in the subsequent quenching step (d).

Next, the workpiece 1 in such a state (semi-finished product state) is subjected to the cutting process of the sprue part and the riser part 11 in the sprue / feeder cutting step (e). In this way, the work 1 that has been geometrically arranged is about 190
Aging furnace 5 adjusted to a temperature of ℃ (aging process (f))
Be transported inside. Here, the work 1 is tempered for about 30 minutes and tempered. The work 1 thus tempered and reinforced is shot blasted in the next shot blasting step (G). As a result, the surface of the disk or the like is subjected to a surface treatment so that a coating treatment or the like is easily performed.

Next, in the machining step (h), the work 1 which has been subjected to each of the above-mentioned treatments is subjected to machining such as drilling on the disk portion and completed as a product. In the next submersion airtightness inspection step (i), the work 1 thus completed is subjected to an airtightness inspection whether or not the rim portion has air leakage or the like. By going through each of these processes, the line is finally lined off as an aluminum wheel. That is, it becomes a finished product.

As described above, in the present invention, the main production line is started by introducing the aluminum alloy ingot into the melting furnace 9 and melting it, and thereafter, the respective steps are performed to continuously manufacture products. Will be advanced. In particular, since the casting step (b) and the heat treatment step including the solution treatment step (c) and the quenching step (d) are consecutively provided, it is possible to partially utilize the residual residual heat during casting. Solution treatment can be performed. As a result, the consumption of heat energy can be reduced.

[0009]

EXAMPLE An example of the present invention will be described with reference to FIG. As shown in FIG. 1, the structure of this embodiment includes a casting step (casting means 2) in which an aluminum alloy ingot is melted and poured into a mold 21 or the like, and thereby the work 1 is molded (cast). The work (semi-finished product) 1 cast by the casting means 2 is continuously subjected to a heat treatment or the like using the residual heat accumulated during the casting (solution furnace 3 etc.).
And a machining process (machining means 7 or the like) for performing a machining process such as a drilling process or a shot blasting process on the semi-finished product (workpiece) 1 that has been subjected to the tempering,
It is basically composed of

In such a basic structure, the casting step is composed of the following steps. That is, a melting furnace 9 for melting an aluminum alloy ingot at about 740 ° C., and a molten metal 9 melted in the melting furnace 9
Automatic water heater 91 for injecting 9 into the mold 21 described below
And a casting including a die 21 that receives the molten metal 99 from the automatic water heater 91 and molds (casts) the work 1 and a tilt casting machine that sequentially and directionally solidifies the molten metal injected into the die. And means (casting device) 2.

Next, in the tempering step, the work (semi-finished product) 1 semi-cooled to a temperature of about 400 ° C. is taken out by a work robot or the like, and the semi-finished product is kept at the temperature of about 530 ° C. as it is. The solution heat treatment furnace 3 for solution heat treating the (work) 1 and the semi-finished product (work work) 1 are heated in the solution heat treatment furnace 3 for about 3 hours to make the crystal grains fine within a short time. Quenching means (quenching device) for immobilizing the crystal grains by subjecting the semi-finished product (work) 1 to water quenching
4 and a sprue / seeder part cutting means (cutting device) 9 for removing the sprue part and the riser part 11 formed at the time of casting of the semi-finished product (workpiece) 1 subjected to the heat treatment with a cutter or the like.
8 and about 1 part of the semi-finished product (workpiece) 1 from which the gate and feeder 11 are removed by the gate / feeder cutting device 98.
It is composed of an aging furnace 5 which is tempered (tempered) at a temperature of 90 ° C. for about 30 minutes to enlarge the crystal grains.

Next, the machining process for machining the semi-finished product (workpiece) 1 that has been subjected to tempering
The shot blasting means 6 for improving the coating of paint on the disk surface of the aluminum wheel, which is to be applied later, and the drilling of the disk surface are mainly used. Machining means 7
It consists of and. Further, a water-immersed airtightness inspection means 8 is provided for performing water-immersed airtightness inspection on the rim surface of the machined material by the mechanical processing means 7 for air leakage.

The various means from the melting furnace 9 which is a means for melting an aluminum alloy ingot to the submerged airtightness inspection means 8 in the final step are constructed continuously and continuously. is there.

The operation of the present embodiment having such a configuration,
In particular, the manufacturing process and the like will be described with reference to FIG.
First, in the melting step (a) of FIG. 1, the aluminum alloy ingot is melted in the melting furnace 9 to generate the molten metal 99. The molten metal 99 is supplied into the mold 21 through the automatic water heater 91 and the like (casting step (b) in FIG. 1).
The work 1 formed (cast) in the die 21 in this manner is taken out by a robot or the like in a semi-cooled state, and is conveyed to the next solution heat treatment furnace 3 (solution heat treatment step (C)). It
In this solution heat treatment furnace 3, a solution heat treatment is performed at a temperature of about 530 ° C. for about 3 hours. Then, the work 1 subjected to the solution treatment is subjected to heat treatment such as water quenching in the subsequent quenching step (d).

Next, the work 1 in such a state (semi-finished product state) is subjected to the cutting process of the sprue part and the riser part 11 in the sprue part / feeding part cutting step (e). In this way, the work 1 in the shapely arranged state is about 190 ° C.
It is conveyed into the aging furnace 5 (the aging treatment step (f)) whose temperature is adjusted to. Here, the work 1 is tempered for about 30 minutes and tempered. In the work 1 thus tempered, the strength can be increased by increasing the size of crystal grains.

Next, in the shot blasting step (G), shot blasting is applied. As a result, the surface of the disc or the like is subjected to a surface treatment so that a coating treatment or the like is easily performed. Next, in the machining step (h), the work 1 that has been subjected to each of these treatments is subjected to a machining process such as a drilling process on the disk portion to complete a product. In the next submersion airtightness inspection step (i), the work 1 completed in this way is subjected to the submersion airtightness inspection whether or not the rim portion has air leakage or the like. By going through each of these steps, the aluminum wheel is finally lined off. That is, it becomes a finished product.

[0017]

According to the present invention, in an integrated manufacturing line (manufacturing apparatus) for wheels made of aluminum alloy, a melting furnace for melting an ingot made of aluminum alloy and a molten metal of the aluminum alloy melted in the melting furnace are used. An automatic hot water supplying means for supplying hot water into the mold, a casting means comprising a mold for receiving the molten metal from the automatic hot water supplying means and a tilt casting machine for sequentially and directionally solidifying the molten metal injected into the mold, and the casting means. In a semi-finished work that has been cast to have fine crystal grains in the semi-cooled state, and a solution heat treatment furnace that heat-treats the work, and the work heated in the solution heat treatment furnace. Quenching means for quenching the water with water, etc., and a sprue part / seeder part cutting means for cutting the still-existing sprue part, riser part, etc. on the work subjected to the heat treatment such as quenching, Hot water Shot blasting on the surface of the work that has been tempered in the aging furnace and the aging furnace that tempers the work that has been cut at the sprue part and the riser part. From the shot blasting means for performing the treatment, the machining means for machining the work subjected to the shot blasting treatment, and the submerged airtightness inspection means for checking the presence or absence of air leakage, etc. for the work subjected to each of these treatments. Since it was decided to adopt the following configuration, a series of integrated lines from the process of melting the aluminum alloy ingot in the melting furnace to the final process of product machining and further to airtight inspection Can be formed. As a result, the lead time can be shortened,
It has become possible to support the production of a large number of small quantities. Further, by continuing the casting process and the heat treatment process such as solution treatment, the solution heat treatment can be performed by utilizing the residual heat at the time of casting, so the consumption of heat energy is reduced. As a result, the casting cycle time and the heat treatment time can be shortened.

[Brief description of drawings]

FIG. 1 is a process explanatory diagram showing an overall configuration of the present invention.

[Explanation of symbols]

1 Workpiece (semi-finished product) 11 Gate / rise part 2 Casting means 21 Mold 3 Solution furnace 4 Quenching means (water quenching means) 5 Aging furnace 6 Shot blasting means 7 Machining means 8 Water immersion airtightness inspection means 9 Melting furnace 91 Automatic Hot Water Supply Means (Automatic Hot Water Supply Machine) 98 Gate / Cutting Device Cutting Device (Cutting / Cutting Device) 99 Molten Metal

Claims (1)

[Claims] 1. A melting furnace for melting an aluminum alloy ingot, an automatic hot water supplying means for supplying molten metal of the aluminum alloy melted in the melting furnace into a mold, and a metal for receiving the molten metal from the automatic hot water supplying means. A mold and a casting means including a tilt casting machine for sequentially and directionally solidifying the molten metal injected into the mold, and a semi-finished work piece cast by the casting means so as to have fine crystal grains. The solution is taken out in the cooled state and the solution heat treatment is performed on the work, the quenching means for quenching the work heated to a constant temperature in the solution furnace with water or the like, and the heat treatment by the quenching means. A sprue part / seed part cutting means for cutting the sprue part and the sprue part, etc. still remaining on the applied work, and a sprue part / seed part cutting process by the sprue part / supply part cutting means. Made of An aging furnace for tempering the work, a shot blasting means for performing a shot blasting treatment on the surface of the work that has been tempered in the aging furnace, and a machining of the shot blasted work. An apparatus for manufacturing an aluminum alloy wheel, comprising: a machining means; and a submerged airtightness inspection means for performing an air leak check or the like on a work subjected to these treatments.