Forging Penetation Efficiency Of Radial Forging Machine And Study Of The Related Process

Nowadays, radial forging machine is the most advanced free forging machine; it has unique advantages on the forging of high-carbon alloy steel. In fact, the forging penetration efficiency(FPE) of the radial forging machine is low. Besides, it can only stretch the blank, which will lead to the fibre texture on forgings and increase the anisotropy of the forging properties. However, decreasing the anistropy of the forgings properties is an important way to enhance the performance of die steel product.The three-dimensional finite element software DEFORM-3D was used to study the radial forging process. Many factors which could affect the process were taken into consideration such as pile impression, feed rate, friction coefficient and the geometrical shape of forging die. Improving FPE by generating greater effective plastic strain in the core of forging and descending the anistropy of the forgings by uniforming the effective plastic strain field.Flat hammer used currently in effect process was used on the simulation experiment. According to the result of the simulation experiment, reasonable parameter was carried out which could increase FPE and decrease the anistropy of the forgings. The internal stress distribution of flat forging hammer forging were studied to determine the corresponding position in different parts of hammer forging internal stress situation, provides a reference to improve the hammer angle. Conical surface hammer was put forward to improve hammer shape as the first step hoped to achieve small forging ratio. Compared flat hammer forging, conical surface hammer makes forging internal strain uniformity has been improved. In order to make up the defect of conical surface hammer that FPE is low and make the blank out of shape and went against the following process, new type hammer was raised. Then the reasonable process parameter was explored.Finally, the effects of different friction factor hammer forging effect of different shapes, rational technological parameter was carried out to solve the pit problem that as a defect often showed on the head of the radial forgings.