People's inertial thinking is that special screws must be corrosion-resistant and rust-resistant. Their materials must be made of stainless steel SUS304# or even stainless steel SUS316#. In fact, the special surface treatment of special screws can also achieve the anti-corrosion effect of stainless steel SUS304#, and even better. What are the techniques that can make the special screw's anti-corrosion stainless steel effect:
Special screws
A: Sealing agent, the principle is to add an ordinary process in the electroplating process, the product surface is coated with a protective film of oxygen isolation. The thickness of this layer of protective film is generally within 0.005mm, which is easy to use and has obvious effects. It can generally increase the salt spray time by 2- to 10-fold and the process can meet the requirements of environmental protection. The disadvantage is that the product size requirements are high and cannot be used, which will increase the overall size.
Second: electrophoresis + electroplating, that is blank parts first electrophoresis, and then according to customer requirements plating. The salt spray time can be extended by more than 2 times. The process is relatively simple and the price is low.
Three: Dacromet, the latest surface treatment method introduced from the United States, has a very beautiful appearance, superior anti-rust ability, and a 2,000-hour salt spray test. The disadvantage is that the production cost is high. Although the above three electroplating processes are more expensive than ordinary electroplating, they are still relatively price-competitive with stainless steel SUS304# raw materials. Their corrosion resistance and rust resistance are no worse than those of 304#, and even with the development of science and technology, the electroplating process will resist corrosion and rust. It is possible to go beyond SUS304. Screw factory often encounters special screws that are resistant to corrosion and rust, but also have hardness grade requirements, so that SUS304 material cannot be used. SUS304# has strong rust resistance but cannot be heat-treated. Its hardness is the hardness of the raw material, so-called bear paws and fishing. Can not be combined. At this time special surface treatment process will play a role in the use of carbon steel hardened, with a special surface treatment process to do surface corrosion and rust treatment special screw grade hardness, surface rust function is also, both Qi and the United States.
154,Special screw strong beam mold
Punching die in the special screw manufacturing process for the quality of the stability and the value of the use of finished products, such as the most important, from the straight line diameter of the wire by a die first extrusion stable ratio, in order to make the second punching correct, so that the cross or word Or plum and other die to extend the life in order to achieve the purpose of use.
Special screws
The special screw strong beam mold can be said to be "difficult, high quality, high precision," these three high mold? In the same product drawing, why are the different beam molds produced by different mold factories so different? The beam ratio is not the same as the bigger one. The beam is able to beam in. It is of different lengths and sounds. It is also scary. One accidentally bursts and bursts. This type of mold needs to eat good oil—the peanut oil used in the general screw factory. ), good strong beam die on the general oil on the line, so that the cost of flat products will be reduced. Mystery mainly in the ligament and inverted R angle position, the ligament is not good, but the longevity is long. The ligament is short, but the life span is shorter. There is the polishing treatment of the ligament and the inverted R angle, as well as inverted R The angle of the angle is generally the reverse R angle of the shrink rod mold is forty-five degrees is the best, there is no bubbling on the Internet for a few months, and occasionally see the sunburn's "hard bone" picture is very pleased, this product was previously only Europe and the United States Little Japan can do it. Now China's own screw factory can do it. It is not easy to do good products at home: Materials and heat treatment are all critical, but the foundation is weak and it is more difficult to do well. However, I firmly believe that in China and the world, high-end products are the goal of everyone. Pay tribute to the technicians fighting in the first-line workshop!