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Also in the precision manufacturing industry, Boeing is happy to lead media reporters to visit the factory in Everett, Washington. Apple is as mysterious as possible, and confidential work is still leaking. So a lot of news about Apple comes from "rumors", rumors that there is a CNC workshop in Germany for Apple products, rumors that a top expert in the supply chain industry suddenly moved to "Cubitino" (Apple Headquarters) or Shenzhen and so on. While everyone is amazed at the size of Apple, high-precision hardware integration and high-quality execution coordination also want us to find out.
However, this is just a good vision. All the interpretations of Apple Watch can only be obtained from Apple's official video clips and information obtained from the product supply chain, but this is enough for us to make Apple Watch, Apple's new product. Have a deep understanding. Next, we will explain how the three materials of gold, stainless steel and aluminum alloy become a group of works of art in the hands of Apple.
Gold version
Watch manufacturers generally exclude gold during research and development: the yield strength is too low, and the too soft nature also determines that it cannot withstand the wear and tear experienced every day like other watches. Through history, alchemists and metallurgists have used almost all attempts for thousands of years to combine the solid elements of gold and other elements of the periodic table to compensate for their shortcomings. 
Compared to higher purity gold, the purity of 18K gold only needs to reach 75%, which means that 25% of the space in the alloy can be used, which is why many manufacturers are willing to use the more flexible 18K gold. To make gold products. Rolex built an indoor unit in Geneva to produce precious metal materials; Hublot developed a composite ceramic material called “Magic Gold†and declared it to be more durable than any material.
How does Apple play soft gold in the palm of the hand? An Apple patent application reveals the secret. Apple's own material not only has higher strength, but also greatly reduces the weight, thus maintaining the watch itself. Lightweight.
The first step in Apple's transformation of gold is to strengthen the treatment. Work hardening is a process that seems to violate human intuition. Through fire quenching, cold drawing and other techniques, the soft material strength can be improved, and the lifting effect is obvious. The process of casting gold into ingots is also in the case of plastic deformation, the grains are slipped, dislocation entanglement occurs, the grains are elongated, broken and fibrillated, and residual stress is generated inside the metal. 
Work hardening is a common way of strengthening metal, but hardening has a certain degree, and it is not possible to increase the hardness of gold without limitation. Secondly, Apple added some ceramic powder to enhance the hardness in 18K Admiralty. In the patent we mentioned earlier, we see that the elements mixed with apples include boron carbide, diamond, titanium nitride, aluminum silicate, silicon carbide. , aluminum nitride, etc.
The gold ingots that are subsequently cast are cut to a very precise thickness under the processing of the lathe. The previous casting only provides a rough embryo, which is not enough for the precision required by Apple's next processing. In this step, the cutting accuracy needs to be controlled at 0.01mm. This precision is very necessary, because any small change in the surface of the gold ingot will have an uncontrollable change in the strength of the Apple Watch.
The hardening process is actually rolling back and forth on the metal surface using a roller press. This process is boring, and each crush can only be thinned by a few microns. Once this process is completed, the previously soft gold ingot has a controlled precision hardness that provides the basis for the next cutting control. 
The blanks formed in the above picture are immersed in the ultrasound system. This is where Apple is using the instrument to find out whether the air raid or density inside the blank is uniform. The seemingly inconspicuous voids and material defects can cause material failure under pressure. This level of inspection goes beyond most companies' requirements for products, including Rolex. In fact, ultrasonic immersion testing is commonly used for high-stress medical implants and internal rotating parts of aircraft engines. This step is not only time-consuming, but also only used on expensive custom products. The Gold Edition Apple Watch is completely used for this treatment. 
After the precise cutting is completed, the blank is transferred to a CNC milling machine and fixed through a central hole, and the edge of the blank is cut using a custom end mill. Since this step occurs on the high-column work fixture, this should be a five-axis mill where the buttons, the digital crown, and the outside of the speaker are all operated in the subsequent steps. 
In the next short shot, Apple showed how the gear texture on the digital crown was cut. After the texture cutting, Apple also polished the digital crown so that one finger can be rotated and precisely manipulated. . 
The gold version of the Apple Watch production process video ends with hand-polished. In fact, the company has achieved automatic polishing of all product lines, so it is difficult to determine whether the gold custom version is hand-polished or manually through the skilled eyes to check the final product. 
Although the above is just a part of Apple's Apple Watch Gold Edition from the selection and polishing, it can be seen that Apple is doing the essence of the product, it is not a simple material stacking, but a strict system and strong research and development capabilities, in the problem It will never be easy to act before it is resolved. This spirit runs through the entire process of Apple product development and production, which may be one of Apple's winning methods.
What kind of polishing and polishing has Apple Watch experienced?
Abstract It is undeniable that Apple is still the best "commodity" manufacturer in the world. For some time, this title was once limited to "consumer goods" or "electronic...
It is undeniable that Apple is still the best "commodity" manufacturer in the world. For some time, this title was once limited to "consumer goods" or "electronic products", but since the last quarter, Apple has been doing every day. It is necessary to send the iPhone to the world with the same weight as a Boeing 787. This is just the iPhone. If you count iMac, iPad, iOS, Apple Store, then Apple's industry chain can be regarded as the world's largest. How Apple Watch is made into "Golden into gold" (picture from atomicdelights)
Quenching of gold raw materials (picture taken from atomicdelights)
Cutting of the blank (picture taken from atomicdelights)
Trivial rolling process (picture taken from atomicdelights)
Immersion experiment (picture cited from atomicelights)
Grinding process (picture taken from atomicdelights)
Rounded arc cutting (picture taken from atomicdelights)
Digital crown cutting (picture taken from atomicdelights)
Hand polished (picture taken from atomicdelights)