The die casting process involves the use of a furnace, metal, die casting machine, and die.
The metal, typically a non-ferrous alloy such as aluminium or zinc, is melted in the furnace and then injected into the dies in the die casting machine. After the molten metal is injected into the dies, it rapidly cools and solidifies into the final part, called the casting parts.
The castings that are created in this process can vary greatly in size and weight, ranging from a couple of ounces to 100 pounds. One common application of die-cast parts are housings - thin-walled enclosures, often requiring many ribs and bosses on the interior.
Metal housings for a variety of appliances and equipment are often die cast.
Several automobile components are also manufactured using die casting, including pistons, cylinder heads, and engine blocks. Most home appliances also need lightweight and r aluminum die castingheat dissipation . Other common die cast parts include propellers, gears, bushings, pumps, and valves.
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1. The limit test gradually increases the environmental stress, finds the upper limit of the environmental stress of the equipment (including the components), and determines the safety factor that the equipment uses under the required environmental conditions.
2. After the prototype has been machined out of the development test, an environmental stress is applied to the prototype of the prototype, and its reliability index is checked. In the equipment plan phase, the same environmental stress is applied to various prototypes of different components, materials, structures, and processes, and the reliability index is compared to select the best solution so that high reliability and economic benefits can be obtained. . Another purpose of this kind of test is to measure its reliability index.
3. After the reliability growth test is completed, the failure mode has been defined, and targeted measures have been taken to improve one or more failure factors that have a large impact on the reliability index, so as to achieve the objective of increasing the average adjacent failure time.
4. After the identification test determines the sample according to a certain sampling mode, one or more environmental stress factors are applied to the sample, and a long-term test is performed to obtain a reliability index, thus confirming whether the developed equipment meets the requirements or not. . If the sample is a factory small batch prototype, it is a conclusion that the equipment manufacturing process equipment and management procedures meet the requirements.
5. After the screening test equipment was changed from development to mass production, due to defects in components, materials, workmanship and staff in production, new failure factors were brought to the equipment, or the original potential failure factors of the equipment were expanded, resulting in equipment failure. Early failure, so that the equipment reliability index decreases. In order to approach or achieve the reliability index of the equipment in the development and appraisal, a certain method that leaves no residual stress before the equipment is delivered or in the production process, and does not bring serious consequences to the equipment life, causes the failure of the equipment to be exposed. . The purpose of this type of test is to eliminate the exposed faults, so that the factory qualified equipment can have better reliability indicators.
6. The reliability acceptance test applies the environmental stress level in use to the equipment that can expose its failure to check the equipment reliability level due to the hidden dangers and minor changes in the process, components, materials, production and quality management processes. Reduced to the level of reliability appraisal.
7. The field environmental reliability test will bring the equipment directly to the field environment for use, assess the reliability of the equipment, and calculate its reliability data. If the conditions of the on-site environmental field tests are typical and representative, then the reliability data obtained in the field is the most important. Because the field test reflects the real situation of the use environment, it can be used to verify whether the data obtained from the indoor environment simulation test is true.
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Summarize 7 major reliability environmental tests
As a environmental testing equipment manufacturer, Wuhan Shangchen Test Equipment Co., Ltd. is an experimental equipment developed and produced by the company (UV aging test chamber, high and low temperature test chamber, constant temperature and humidity test chamber, salt spray corrosion test chamber, etc.) Different reliability environmental tests. According to the different circumstances and the needs of the experimental situation, we have summarized the following seven reliability environmental tests.