Aluminum Alloy Die Casting

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. currently has more than 10 cold chamber die casting machines of 200T-1250T models, and a total of 3 hot chamber die casting machines of 88T-168T models. The post-process has finishing equipment: CNC product processing production line, CNC There are more than 100 sets of mold processing production lines, multi-axis multi-function drilling machines, automatic tapping machines, manual leveling machines, and automatic calibration machines. Surface treatment processing equipment: vibrating grinder, vibrating machine, ultrasonic cleaning machine, sandblasting machine, There are more than 80 polishing machines and independent manual, automatic and electrostatic spraying workshops. The company also has foundries, injection molding plants, stamping plants, and powder metallurgy (MIM) plants. Excellent quality has created a reputation for gold. Make the other shore products quickly famous at home and abroad. More than 70% of the products are exported to the United Kingdom, Germany, Japan, the United States, Taiwan and other countries and regions. Welcome to consult Aluminum alloy die casting for household appliances at any time.

Product Description

Basic situation of aluminum alloy die casting for household appliances

1. Implementation standards: The company strictly implements ISO9001 & TS 16949 certification.

2. Product material standards: ISO, GB, ASTM, SAE, ISO, EN, DIN, JIS, BS

3. Main processes: sand casting, silica sol investment casting, water glass investment casting,shell casting,deburring, sand blasting, machining, heat treatment, leak testing, surface treatment, etc.

4. Casting available materials:

Tin bronze, silicon bronze, aluminum bronze, brass, red copper, titanium alloy, high manganese steel, high chromium steel, high nickel steel, carbon steel, alloy steel, stainless steel, gray iron, cast iron, cast steel, cast aluminum, etc. Customized according to customer requirements.

Available materials for die casting:

Aluminum alloy materials in aluminum alloy die castings are mainly divided into three materials: aluminum-silicon alloy, aluminum-silicon-copper alloy, and aluminum-magnesium alloy:

Aluminum-silicon alloy: mainly includes YL102 (ADC1, A413.0, etc.), YL104 (ADC3, A360);

Aluminum-silicon-copper alloy: mainly includes YL112 (A380, ADC10, etc.), YL113 (3830), YL117 (B390, ADC14) ADC12, etc.;

Aluminum-magnesium alloy: mainly includes 302 (5180, ADC5,) ADC6, etc.

Process Characteristics

Aluminum alloy die casting for household appliances has a wide range of weight and size. The light weight is only a few grams, and the weight can reach 400 tons. The wall thickness is only 0.5 mm, the thickness can exceed 1 meter, and the length can be from a few millimeters to more than ten meters. , which can meet the use requirements of different industrial sectors. Generally, for the appearance quality of aluminum die castings, the surface roughness of aluminum die castings can be judged by comparing the sample blocks, and the fine cracks on the surface can be checked by coloring method and magnetic powder method. The internal quality of aluminum die castings can be inspected and judged by methods such as audio frequency, ultrasonic, eddy current, X-ray and γ-ray.

The casting of die-casting aluminum die castings generally selects metals with relatively moderate melting points, such as aluminum and zinc as raw materials, and casts them into various shapes of products through processing equipment, which are used in different fields. Due to the numerous casting processes and complex processes, It is also the main reason for the damage of die castings. The main inspection effort of some manufacturers is to inspect the integrity of the die castings in each process, but this has also become a major difficulty in the production process.

Characteristics of aluminum die castings: Since copper, zinc, aluminum and aluminum alloys have good fluidity and plasticity, and the casting process is performed in a pressurized die casting machine, aluminum die castings can be made into various complex shapes. , It can also make higher precision and finish, thus greatly reducing the machining amount of die castings and the casting allowance of metal copper, zinc, aluminum or aluminum alloys, not only saving electricity, metal materials, but also saving Labor cost; copper, zinc, aluminum and aluminum alloys have excellent thermal conductivity, small specific gravity and high processability; thus aluminum die castings are widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pumps Manufacturing, transmission machinery manufacturing, instruments, landscaping, power construction, architectural decoration and other industries.

Aluminum die-casting parts can be manufactured as die-casting auto parts, die-casting auto engine pipe fittings, die-casting air-conditioning parts, die-casting gasoline engine cylinder head, die-casting valve rocker arm, die-casting valve seat, die-casting power fittings, die-casting motor end cover, die-casting housing, die-casting Pump housing, die-casting building accessories, die-casting decorative accessories, die-casting guardrail accessories, die-casting wheels and other parts, with the continuous improvement of the development level of the domestic manufacturing equipment industry, the equipment level of die-casting machines has also been significantly improved, and the types of parts that can be manufactured are also With the continuous expansion, the precision and complexity of die-cast parts have also been greatly improved. I believe that in the near future, aluminum die-casting parts will serve our production and life!

Advantages of die casting process:

(1) Metal parts with messy shapes, clear outlines, thin walls and deep cavities can be produced. Because molten metal maintains high fluidity at high pressure and high speed, metal parts that are difficult to machine by other processes can be obtained.

(2) The dimensional accuracy of aluminum die castings is high, up to IT11-13 level, sometimes up to IT9 level, the surface roughness is Ra0.8~3.2um, and the interchangeability is good.

(3) The material utilization rate is high. Because of the high precision of aluminum die castings, it can be installed and used only after a small amount of machining, and some aluminum die castings can be directly installed and used. Its material utilization rate is about 60%~80%, and the blank utilization rate is 90%.

(4) Production. Because of the high-speed filling, the filling time is short, the metal industry is condensed, and the die-casting operation cycle. Among various casting processes, the die casting method has high productivity and is suitable for mass production.

(5) It is convenient to use inlays. It is easy to set a positioning mechanism on the die-casting mold, which is convenient for inserting and casting inlays, and meets the local performance requirements of aluminum die-casting parts.

Post Casting Process

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam).

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine;

4. Provide after-sales service.

5. The quality can be traced back.

Application

Die-aluminum casting is a kind of pressure-casting parts. It is a pressure-casting mechanical die-casting machine equipped with an aluminum casting mold. The aluminum or aluminum alloy heated to a liquid state is poured into the feed port of the die-casting machine. The shape and size of the aluminum parts or aluminum alloy parts limited by the mold, such parts are often called aluminum aluminum castings. Aluminum castings have different names in different places, such as aluminum die-casting parts, die-casting aluminum parts, die-casting aluminum parts, die-casting aluminum, aluminum-aluminum castings, aluminum alloy die-casting parts, etc.

Because metal aluminum and aluminum alloy have good fluidity and plasticity, and the casting process is cast in a pressure die-casting machine, die-aluminum castings can be made into various complex shapes, and can also be made with high precision and high precision. The smoothness greatly reduces the machining amount of aluminum castings and the casting allowance of metal aluminum or aluminum alloys, which not only saves electricity, metal materials, but also labor costs; and aluminum and aluminum alloys have excellent thermal conductivity. , Small specific gravity and high machinability; thus aluminum-aluminum castings are widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump manufacturing, transmission machinery manufacturing, precision instruments, landscaping, power construction, architectural decoration and other industries.

The weight and size range of die-aluminum castings are very wide, the light weight is only a few grams, the weight can reach 400 tons, the wall thickness is only 0.5 mm, the thickness can exceed 1 meter, and the length can be from a few millimeters to a dozen meters. Requirements for use in the industrial sector. Generally, for the appearance quality of die-aluminum castings, comparison samples can be used to judge the surface roughness of die-aluminum castings, and the fine cracks on the surface can be inspected by coloring method and magnetic powder method. The internal quality of die-aluminum castings can be inspected and judged by methods such as audio frequency, ultrasonic, eddy current, X-ray and γ-ray.

The quality of die aluminum castings has a great influence on the performance of mechanical products. For example, the size, accuracy and surface roughness of the impellers, casings and hydraulic parts of various pumps directly affect the working efficiency of pumps and hydraulic systems, energy consumption and the development of cavitation, etc., internal combustion engine cylinders, The strength and resistance to cold and heat of die-aluminum castings such as cylinder heads, cylinder liners, piston rings, and exhaust pipes directly affect the working life of the engine.

The four basic processes in the die casting industry are annealing, normalizing, quenching and tempering. These four processes are called the "four fires" in die casting. In the die casting process, the relationship between quenching and tempering is very closely, both are indispensable.

It is understood that annealing is to heat the workpiece. When heated to an appropriate temperature, the aluminum casting is slowly cooled according to the different materials used, and the internal structure of the metal is close to equilibrium.

It is to heat the workpiece to a suitable temperature and then cool it in the air, which is mainly used for the cutting function of the material, and can also be used for the final die-casting of some low-demand parts.

Quenching is to heat and heat the workpiece and then cool it in a quenching medium such as water or other inorganic salt solutions. After this process, the produced steel will become hard and brittle.

In order to reduce the brittleness of steel parts, the quenched steel parts can be placed at a temperature below 650 degrees Celsius and higher than normal temperature for a long time, and then cooled, which is called tempering. Application of aluminum aluminum castings Aluminum materials and aluminum alloys have good fluidity and plasticity, so various complex and difficult aluminum castings can be made. Aluminum castings cast with aluminum alloys and metal aluminum have high precision and surface. Finish, which greatly reduces the amount of machining of aluminum castings, reduces labor intensity, and saves electricity and metal materials at the same time.

Because of its high internal and external quality, die-aluminum castings are widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, transmission machinery manufacturing, precision instruments, landscaping, power construction, and other industries. , become the new favorite of die casting industry.