威廉希尔官方下载Jan 13, 2020
威廉希尔官方下载With the continuous maturity of laser technology, laser marking '> laser marking machine, laser cutting machine, laser welding machine and other application equipment have emerged at the historic moment, and they have become more and more widely used. Costs and other advantages replace some old processes. This article will explain the defects of the old process in the power supply industry and the application analysis of the laser marking machine replacing the old process.
There are dozens of power module manufacturers in Beijing and one or two hundred in China, with a wide variety. There are two types of AC-DC large modules that change from AC to DC and small DC-DC modules that change from DC to DC. Especially the production and sales of DC-DC modules are huge, as many as tens of thousands per month. The marking content includes specifications, company logo, pin definition, etc.
The material of the power module housing is divided into:
1. Plastic (civilian product, large quantity and thin thickness, suitable for the case without heat generation, mostly using paper labels and PVC stickers),
2. Oxidation treatment of aluminum shell (for civilian products, multi-purpose screen printing)
3. Copper spray paint (military product, small amount and large benefit, multi-screen printing)
4. Copper-plated nickel and copper-plated hafnium (military, suitable for heat-generating casing, and with special requirements for shielding and grounding. Multi-screen printing, or heat-resistant adhesive)
威廉希尔官方下载Problems with old craft:
威廉希尔官方下载1. Although the paper label is cheap, it affects the module's heat dissipation. When the temperature rises, the paper label is easy to bulge, deform and even fall off.
2. When the screen printing volume is large, it takes a lot of time and when there are many types, the layout changes are not flexible. Copper nickel plating has a smooth appearance and is not easy to print.
3. There are many types of power modules, and the unit price of paper labels is very expensive when the printing volume is small.
4. Paper labels have been stored in the warehouse for a long time, and they are easily lifted.
5. Variety of types lead to error-prone workers and high labor intensity.
6. For a small number of varieties, the cost of paper label printing is high, so it is directly printed on a printer and affixed, like laboratory products, without grades.
Laser marking requirements:
1. Plastic: The plastic composition is complex, and the laser marking machine produces very different results. It is recommended that module manufacturers ask their shell suppliers to change the plastic distribution ratio. Our company can cooperate with the test until a clear and beautiful mark is printed. Does not affect the protection of the enclosure.
2. Oxidation treatment of aluminum shell: The laser marking machine works well. The newly exposed aluminum gradually oxidizes and changes color but still has obvious contrast, especially the black shell, the contrast color is more obvious. The relatively stable aluminum oxide does not affect the protective effect of the shell.
3. Copper spray paint: Laser marking machine can only remove the paint layer to reveal the copper background. Manufacturers are worried that the copper will grow green and rust will affect the appearance for a long time. According to our company's process test results, there is no problem.
4, copper nickel plating, copper plating: copper plating has a thickness of 7-8U, 4U is required to avoid damage to the coating. Laser marking machine works well.
威廉希尔官方下载Some modules work at temperatures up to 100 degrees. Will the laser markings fail? Because laser marking is permanent, the marked character pattern does not fail.
威廉希尔官方下载The military requires that for the traceability of supplier products, each module has a different number, and paper labels and silk screens are not flexible. And paper labels are easy to fall off and cannot be traced back. The silk screen is easy to wipe off and difficult to trace. Coupled with the military benefits, laser marking can basically be accepted. However, the amount of military products is small, and manufacturers may consider outsourcing laser marking processing.
The large quantity of civilian products has strict requirements for cost reduction, so even if only a small amount of cost is added to each module after laser marking, it is also a pressure on them. However, the cost of using a laser marking machine is similar to that of traditional paper labels and silk screen printing, and the logo is beautiful, which is conducive to the promotion of corporate brands.
威廉希尔官方下载The above four materials can be marked with YAG laser marking machine. The single marking time is from ten seconds to twenty seconds, and the processing cost calculated by the user is about one dime.
Power module manufacturers not only need to mark the module housing, but also need to identify the product number on its internal dedicated high-frequency transformer (magnetic material ferrite). The same version of the PCB printed board also needs to be marked with a different serial number during the production process.