How to deal with the density and slippage of titanium screws?

Update:06-08-2021
Summary:

In recent years, the development trend of China's titan […]

In recent years, the development trend of China's titanium industry has been very violent, and it has become a major country in titanium production and development. The output value of Chinese titanium screw manufacturers is increasing year by year. Titanium alloy screw materials are also widely used in mechanical equipment, electronic equipment, communication equipment, hardware lighting, bridge construction and other industries, and gradually enter the civilian field. Usually, commodities made of this material almost always use low-density titanium screws, usually where both density and weight are required.

  
Titanium alloy screws are not high-strength materials. They have a high specific strength. The density of titanium alloy screws is about 50% to 60% of 45 steel, but the strength is the same. Titanium alloy screw has high strength, good heat resistance and low temperature resistance. Titanium has good corrosion resistance to salt, sea water and nitric acid. This is a well-deserved space and ocean metal.

As for the phenomenon of sliding wire in titanium screw processing, we sometimes encounter overflow of titanium alloy screws, which is also called sliding wire. On bicycles, threaded holes in aluminum parts such as brackets, cranks and seatpost clamps are usually seen. Titanium screws and pedal shafts are usually fine. The perfect repair method is to enlarge the hole and knock on the titanium screw sleeve, but this process is not only expensive, but it is also impossible to enlarge the hole in some places.
  

There are some solutions, such as wrapping knives, raw material tape, thread glue or 502, but the result is that if the thread is not tightened, it is useless. Now, I will introduce a simple correction method. As long as the small tape measure and snap are flexible, there must be a coil spring inside. Remove the coil spring before throwing it away.
  

If the titanium alloy thread overflows, cut a small part of the coil spring, fold the head, put it into the overflow threaded hole, and then screw it directly into the titanium alloy screw. Basically, the tightening torque of the original aluminum screw hole can be restored, and it can be removed repeatedly, and the spring will not fall. When tightening, coil springs of different widths can be selected according to the size of the titanium alloy screw hole. It may be possible to put two coil springs into the screw holes of the titanium alloy.