Common factors contributing to the darkening of aluminum alloy die castings

The continuous development trend of die-casting industrial production has led to an increase in the use of aluminum alloy die-casting parts


The continuous development trend of die-casting industrial production has led to an increase in the use of aluminum alloy die-casting parts. Despite the fact that aluminum alloy die-casting has good circulation and forging effects, it is very easy for the material to become black throughout the application process.

1. The technology used in the process is not scientific. As a result of the carelessness of aluminum alloy die castings after cleaning or pressure inspection, a standard has been established for aluminum alloy die castings to grow mildew and turn black, and this standard has accelerated the transformation of mildew into.

2. The management of logistics and storage facilities is not timely. Mold growth is affected differently depending on the aspect ratio of the aluminum alloy die-casting parts at the time of storage in the warehouse.

3. Components of the aluminum alloy's internal structure

The majority of companies that produce aluminum alloy die-casting either do not perform any sort of cleaning treatment following the process of die-casting and machining or simply fill with tap water, neither of which can be completely cleaned and tidy. Mildew and blackening of aluminum alloy die castings can be sped up by the presence of corrosive chemicals like saponification liquid and other types of dirt.

4. The influence of the aluminum alloy's surroundings on its exterior. Aluminum is a vivid metal material, and it is very easy to oxidize the air to blacken or grow mold under certain ambient temperature and temperature standards. These conditions are also the choice of aluminum itself, which is why temperature standards are important.

5. The use of cleaning agents is not permitted in this scenario.

The cleaning agent that is utilized is extremely corrosive, which results in die-cast aluminum having air oxidation etched into it. In order to effectively prevent some problems caused by unscientific surface treatment design of aluminum alloy die-casting parts, untimely storage, The problem of blackening of aluminum alloy die-casting parts caused by unreasonable cleaning, and experienced aluminum alloy die-casting manufacturers also have certain advantages in the process of customizing aluminum alloy die-casting parts, we need to find an experienced die-casting factory in the process of customizing aluminum alloy die-casting parts. In order to effectively prevent some problems caused by unscientific surface

There are a few standard approaches to deburring die castings.

1. Manual deburring. The use of auxiliary tools such as files, sandpaper, grinding heads, and the like is common practice in many general die-casting plants. This method is also utilized frequently. There are two different types of manual files, as well as pneumatic wrong knives. Manual operation is time-consuming, costly, and ineffective, and it is challenging to clean out complex cross-hole patterns. It is appropriate aluminum alloy die casting for zinc alloy die castings because they have small burrs and a simple product structure, which makes them suitable for workers with low technical requirements. Which techniques should be chosen to deburr the die casting plant, and which factors should be taken into consideration before making a decision.

2. Clean the mold by removing any burrs. To deburr, you can use a stamping die in conjunction with a punch. It is necessary to incur the cost of producing a die (rough die plus fine blanking), and die making may also be required. It is ideal for products that have simple parting surfaces, and both its efficiency and its deburring effect are superior to those achieved through manual labor.

3. Remove the burrs with a grinder. This technique for deburring involves the use of rollers, sandblasting, vibration, and so on. At the moment, die-casting plants in Dongguan make use of more. In the event that there is a problem with the cleanliness of the cleaning, it is possible that manual follow-up processing or other methods of deburring will be required. Appropriate for use with large quantities of relatively small products.

4. Freeze deburring. In order to remove burrs from zinc alloy die castings, first make the burrs brittle through cooling, and then blast them away with shot. The cost of the equipment ranges somewhere between 200,000 and 300,000 yuan; it is appropriate for zinc alloy die-casting that requires a small wall thickness and a small volume.

5. To remove burrs, use a hot blast of air. In some circles, this process is also referred to as thermal deburring or explosion deburring. After a portion of the combustible gas is introduced into the equipment furnace, the gas is instantly exploded as a result of the action of certain media and conditions. The energy generated by the explosion is then used to dissolve and remove the zinc alloy die-casting burrs. It has a high cost (in the tens of millions), high operating technical requirements, low efficiency aluminum die casting parts, and side effects (rust and deformation), but it is primarily used in some fields that require high precision parts, such as aerospace and automobiles.

Deburring the engraving machine is the sixth step. It is suitable for simple space structures and simple rules for the required deburring position, and the cost of this machine is not very high (in the tens of thousands), so you can buy it without breaking the bank.

7. Deburring with chemical agentsThe dehairing of parts made of metal materials can be accomplished in an automatic and selective manner by utilizing the fundamental concept of electrochemical reaction. Suitable for products with a thickness of less than seven wires, including pump bodies and valve bodies, as well as other products. Suitable for pump bodies, valve bodies, and other products.

8. deburring by electrolytic means. There is presented here an introduction to a process method for electrolytic machining of burrs in metal zinc alloy die castings. The electrolytic solution is corrosive to some degree, and burr electrolysis will also occur near the zinc alloy die casting. This will cause the surface to lose its original luster, and it may even have an effect on the casting's dimensional accuracy. In the process of zinc alloy die-casting, electrolytic deburring is a method that can be used to remove burrs from parts that have cross holes or complex shapes. On gears, connecting rods, valve bodies, and crankshaft oil passage holes, it is utilized for deburring, rounding of sharp corners, and other similar tasks.

9. A water jet with a high pressure that can be used to remove burrsWhen water is used as the medium, the instantaneous impact force can be used to remove burrs and flashes that are produced as a result of processing, which accomplishes the goal of cleaning at the same time. The price is significantly higher, and the primary application for it is in the hydraulic control systems of automobiles and construction equipment.

10. deburring with ultrasonic wavesBurrs can be removed instantly using ultrasonic and high-pressure technology.