Forging is a titanium metal billet (excluding plate) to apply external force, so that it produces plastic deformation, change size, shape and improve performance, used to manufacture mechanical parts, workpieces, tools or blanks of the molding process method. In addition, according to the slider movement there are slider vertical and horizontal movement (used in the forging of long and thin parts, lubrication and cooling and high-speed production of parts forging), the use of compensation devices can be added to the other direction of the movement. The different ways mentioned above, the required forging force, process, material utilization, yield, dimensional tolerances and lubrication and cooling methods are not the same, these factors are also factors affecting the level of automation. According to the way the billet moves, forging can be divided into free forging, upsetting, extrusion, die forging, closed die forging, closed upset forging.
Closed die forging and closed upsetting forging have a high material utilization rate because there is no flying edge. It is possible to complete the finishing of complex forgings with one process or several processes. Because there is no fretting, the force area of the forging is reduced, and the required load is also reduced. However, care should be taken not to make the billet completely restricted, for this reason, the volume of the billet should be strictly controlled, the relative position of the forging die should be controlled and the forging should be measured, and efforts should be made to reduce the wear and tear of the forging die. According to the motion of the forging die, forging can be divided into pendulum rolling, pendulum rotary forging, roll forging, wedge cross rolling, rolling ring and oblique rolling and so on. Pendulum rolling, pendulum rotary forging and ring rolling can also be used for precision forging. In order to improve the utilization of materials, roll forging and cross rolling can be used as a slender material before the process. Rotary forging, like free forging, is also localized, and has the advantage that it can be formed with a small forging force compared to the size of the forgings. This forging method, including free forging, processing material from the mold surface near the free surface expansion, therefore, it is difficult Precision, so the direction of movement of the forging die and rotary forging process with computer control, can be used to obtain the shape of the lower forging force is complex, high-precision products, such as the production of a variety of large-size turbine blades and other forgings. In order to obtain high precision should pay attention to prevent overload at the lower dead center, control speed and die position. Because these will have an impact on the forgings tolerance, shape accuracy and die life.
In addition, in order to maintain precision, should also pay attention to adjust the slider guide clearance, rigidity, adjust the lower dead center and the use of subsidized transmission and other measures. Titanium Forging materials are mainly pure titanium and titanium alloys of various compositions, the original state of titanium materials are bars, ingots, metal powder and liquid metal. The ratio of the cross-sectional area of the metal before deformation to the cross-sectional area after deformation is called the forging ratio. Correct choice of forging ratio, reasonable heating temperature and holding time, reasonable beginning and final forging temperature, reasonable amount of deformation and deformation speed to improve product quality and reduce costs have a great relationship. General small and medium-sized forgings are round or square bars as blanks. Bar grain organization and mechanical properties are uniform, good, accurate shape and size, good surface quality, easy to organize mass production. As long as the heating temperature and deformation conditions are reasonably controlled, do not need a large forging deformation can be forged with excellent performance forgings.
