Design and manufacture of titanium containers

Design and manufacture of titanium containers
1,Why is the rebound of titanium material larger in cold stamping or cold bending? What are the influencing factors?
Titanium in the cold stamping or cold bending of the rebound is larger, because the yield limit of titanium and the elastic modulus of the ratio of large.
Cold stamping or cold bending is a combination of plastic and elastic deformation process, when the stamped or bent workpiece is unloaded, the elastic deformation of the part of the workpiece to try to restore the original shape and rebound.
Elastic rebound of the workpiece volume, openness and radius changes, affecting the accuracy of the workpiece.
There are many factors affecting springback, the most important of which are as follows.

a. The harder the material, the greater the amount of rebound; b. The lower the modulus of elasticity, the greater the amount of rebound.
b. The lower the modulus of elasticity and the higher the yield limit, the greater the springback.
c. The thicker the part, the greater the stress at the outer edge, and the greater the plastic deformation for a given value of bending angle, the lower the springback; d. The greater the degree of deformation, the higher the springback; e. The higher the bending angle, the higher the plastic deformation.
d. The greater the deformation, the greater the springback.
e. The springback is greater in unidirectional bending than in multiple-kok bending; f. The springback is greater in free bending than in multiple-kok bending.
f. The rebound in free bending is three times greater than that in stamping with a die.
g. The higher the degree of cold work hardening of the metal, the higher the springback; and
h. As the temperature of the workpiece stamping or bending increases, the amount of rebound decreases.
2, titanium in the cutting process should pay attention to what matters?
Titanium material in cutting, processing should be noted that the following characteristics of titanium.
(1) Titanium has a high coefficient of friction, which makes the chips easy to generate high temperature during the cutting process and accelerates the tool wear;
(2) The thermal conductivity of titanium is small, the chips are tough and do not curl, and the heat generated by friction with the tip of the tool is almost entirely concentrated on the cutting edge and the forward tilting surface of the tool, which results in burns on the cutting edge. Therefore, the amount of feed should not be too small, and the cutting speed should not be too high, or else it will be easy to stick to the knife and the fine titanium chips will burn, resulting in accidents; 
(3) Due to the small modulus of elasticity of titanium, deep cutting of fine workpiece is prone to deflection, the workpiece is prone to leave the tool, so in the processing of the need to install anti-vibration frame;
(4) Titanium has high-temperature activity, which may lead to surface contamination of the workpiece during machining.
(5) Because titanium contains high hardness oxides, nitrides and carbides, so in the cutting process is easy to lead to the cutting edge of the tool soon wear;

(6) when cutting titanium, the cutting edge of the tool is easy to leave the tool, so it is necessary to install a vibration isolator.