Abstract Because it is not responsible for the production of the iPhone, many specific contents (such as tool speed, model, etc.) are not clear, but from the promotional videos and copy files currently released by Apple, the technical difficulty is not high enough to be untouchable. Level, cost and difficulty...
Because it is not responsible for the production of the iPhone, so many specific contents (such as tool speed, model, etc.) are not clear, but from the promotional videos and copywriting that Apple currently releases, the technical difficulty is not as high as an unreachable level. The cost and difficulty are mainly concentrated on quality control. 
The bright black iPhone7 is out of stock, and the price has been squandered by the oxen to about 20,000 yuan.
1, cutting
2, the lens compartment
I slightly raised the brightness a bit, you can see that the circumference of the fuselage has been cut out of the arc:
3, milling machine
Here, the surface of the fuselage is machined using a milling machine, which is generally chamfered, burr-removed, etc., depending on the purpose, different tools can be used. Here, the 45° face milling cutter of Figure 2 is used, and the concave can be seen. The trough is used to discharge metal debris:
Here, the surface of the fuselage is machined using a milling machine, which is generally chamfered, burr-removed, etc., depending on the purpose, different tools can be used. Here, the 45° face milling cutter of Figure 2 is used, and the concave can be seen. The trough is used to discharge metal debris:
The structure is probably longer, this is a 90°:
4, polishing
Here Jony said that it uses a special compound, which is speculated to be a delicate polishing sand. The polished sand is not magical. Generally, the metal surface cut by CNC will have the back pattern of Figure 1. The original one is manually ground with sandpaper. From 600 sandpaper to 2000, according to demand, the technology has improved the use of blowers to blow sand, there is no picture on the hand, in the past is to understand the contact, now Apple is more direct, the mechanical arm is holding the sand Li Wei, think about it and the polishing of toothpaste is similar:
Here Jony said that it uses a special compound, which is speculated to be a delicate polishing sand. The polished sand is not magical. Generally, the metal surface cut by CNC will have the back pattern of Figure 1. The original one is manually ground with sandpaper. From 600 sandpaper to 2000, according to demand, the technology has improved the use of blowers to blow sand, there is no picture on the hand, in the past is to understand the contact, now Apple is more direct, the mechanical arm is holding the sand Li Wei, think about it and the polishing of toothpaste is similar:
5, anodizing process
This high school chemistry should be known, put into the electrolyte solution, and finally can form a film on the metal surface (guess AF film, anti-fingerprint) to protect the color of the metal, but also play a decorative role, because It’s not the engineer responsible for production. I don’t know if there is any difference in the pH, concentration and composition of the electrolyte in the apple;
The following figure also shows that the polished metal surface is extremely smooth, but there are also subtle lines of the same direction, which is inevitable, and all will have the next step;
This high school chemistry should be known, put into the electrolyte solution, and finally can form a film on the metal surface (guess AF film, anti-fingerprint) to protect the color of the metal, but also play a decorative role, because It’s not the engineer responsible for production. I don’t know if there is any difference in the pH, concentration and composition of the electrolyte in the apple;
The following figure also shows that the polished metal surface is extremely smooth, but there are also subtle lines of the same direction, which is inevitable, and all will have the next step;
6, dyeing
Here Jony mentioned a word, Capillarity. I don't know how many high-level biological plant catheters you remember. Explain slightly, if we insert a straw into the water, we will see the inner wall of the straw. The waterline is slightly above the outside because the pipette has an Adhesive force on the water. This adhesion is due to the close contact of the water with the pipe wall and there is some intermolecular force that helps the water body overcome. Gravity movement, such as the transport of nutrients by the catheter of the plant I mentioned earlier, is one of them; why is it possible to use this phenomenon to dye, because there are a lot of uneven grooves on the surface of the aluminum alloy, and these grooves are finally It is capable of adsorbing liquid dyes.
So is this process high and not advanced? The answer is not high at all... your water-based pen, pen, etc. are also the principle to ensure the ink flow in the pen...
Here Jony mentioned a word, Capillarity. I don't know how many high-level biological plant catheters you remember. Explain slightly, if we insert a straw into the water, we will see the inner wall of the straw. The waterline is slightly above the outside because the pipette has an Adhesive force on the water. This adhesion is due to the close contact of the water with the pipe wall and there is some intermolecular force that helps the water body overcome. Gravity movement, such as the transport of nutrients by the catheter of the plant I mentioned earlier, is one of them; why is it possible to use this phenomenon to dye, because there are a lot of uneven grooves on the surface of the aluminum alloy, and these grooves are finally It is capable of adsorbing liquid dyes.
So is this process high and not advanced? The answer is not high at all... your water-based pen, pen, etc. are also the principle to ensure the ink flow in the pen...
7, magnetic bath
This is probably the part that everyone wants to know. Jony said that it is a magnetized iron powder bath. In fact, it should be referred to as a magnetorheological fluid (MRF) bath, and this magnetorheological fluid refers to the micron-scale. The new non-colloidal suspension liquid formed by the paramagnetic or soft magnetic particles dissolved in the low magnetic permeability carrier liquid looks very advanced. To finish, you can write several Papers. Generally speaking, this liquid is applied by application. The magnetic field (the metal block in the middle of the figure is an electromagnet) can greatly increase its viscosity coefficient in a few milliseconds, and finally even form something like a solid state;
So why do we use this liquid for polishing? Nothing else, fine, good control, and no wear on the grinding head. We saw in the front, fine sand, there will be visible lines after polishing, and for the metal body that has been plated, if sand is used again To polish, it is equivalent to the previous protective film is consumed, and imagine, if we control the diameter of the sand to the micron level mentioned before, what would be the effect?
There is limited space, I have no way to explain in detail the whole principle of this process, if you are interested, you can own Google related papers. Here is a section of the Chinese Academy of Sciences "Magnetorheological Polishing Technology", which explains better than I:
In 1994, an optical processing method called "magnetic liquid grinding" appeared. In this method, a "floating body" is placed in the magnetic liquid. Under the action of the magnetic field, the magnetic liquid acts as a force on the "floating body" to make it contact with the workpiece for polishing. In this way, the force received by the entire "floating body" is replaced by the force of the entire "floating body", so that the polishing pressure is greatly enhanced. This method is more suitable for ceramic materials workers.
This is probably the part that everyone wants to know. Jony said that it is a magnetized iron powder bath. In fact, it should be referred to as a magnetorheological fluid (MRF) bath, and this magnetorheological fluid refers to the micron-scale. The new non-colloidal suspension liquid formed by the paramagnetic or soft magnetic particles dissolved in the low magnetic permeability carrier liquid looks very advanced. To finish, you can write several Papers. Generally speaking, this liquid is applied by application. The magnetic field (the metal block in the middle of the figure is an electromagnet) can greatly increase its viscosity coefficient in a few milliseconds, and finally even form something like a solid state;
So why do we use this liquid for polishing? Nothing else, fine, good control, and no wear on the grinding head. We saw in the front, fine sand, there will be visible lines after polishing, and for the metal body that has been plated, if sand is used again To polish, it is equivalent to the previous protective film is consumed, and imagine, if we control the diameter of the sand to the micron level mentioned before, what would be the effect?
There is limited space, I have no way to explain in detail the whole principle of this process, if you are interested, you can own Google related papers. Here is a section of the Chinese Academy of Sciences "Magnetorheological Polishing Technology", which explains better than I:
In 1994, an optical processing method called "magnetic liquid grinding" appeared. In this method, a "floating body" is placed in the magnetic liquid. Under the action of the magnetic field, the magnetic liquid acts as a force on the "floating body" to make it contact with the workpiece for polishing. In this way, the force received by the entire "floating body" is replaced by the force of the entire "floating body", so that the polishing pressure is greatly enhanced. This method is more suitable for ceramic materials workers.
The above is the processing of the entire iPhone 7, you said it is difficult? It’s not difficult, the reason is here, you said it’s simple, it’s not simple, because every process is backed by strong financial support and technology accumulation. The speed and solution of the temporary problems encountered can not be imagined out of thin air. More importantly, the quality requirements, the extent of USL and LSL proposed by Apple to the supply chain, I don't know, but from the past, it should be the highest level in the industry.
China's super-hard material network Xiaobian and then exclusively on the iPhone7 mobile phone body full version processing video
China's super-hard material network Xiaobian and then exclusively on the iPhone7 mobile phone body full version processing video
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