Defi ning of strain non-uniformity during rods forging on lever-type radial-forging machine

The results of the strain non-uniformity in the forging of rods on the radial-forging machine by using FE modeling are presented. Comparative analysis of the strain non-uniformity distribution in the fi nal product for the rods forging on the lever-type radial-forging machine and the swaging machine and for different values of feed rate of the rod to the lever-type radial-forging machine is carried out.

Pipes production by hot reducing at SKK-14 radial-forging machine

At small-capacity production of pipes a process of pipes reducing at radial-forging machines can be effective for expanding of pipes assortment by diameter and wall thickness. Results of pilot work on hot reducing at radial-forging machine SKK14 of pipes, made of corrosion-resistant steels 12Х18Н10Т and 10Х23Н18. Based on analyses of known recommendations on pipes forming during reducing by longitudinal rolling at reducing mills, as well as at radial-forging and rotary-forging machines, it was recommended to use a known dependence Sр = S0/[1 – 0,0044(D0 – Dр)], usually applied for pipes rolling conditions at reducing mills, for predicting of reduced pipe wall thickening. To determine the pipes internal surface quality, a hot reducing of pipes made of 12Х18Н10Т steel was accomplished using different technological routes and taking into consideration a possibility of forming folds and laps on the surface. It was established that longitudinal folds (wrinkles) are not formed on the pipe internal surface at the pipe outer diameter decreasing by less than 30%, while the longitudinal folds (wrinkles) are formed at decreasing of the pipe outer diameter by more than 45%. Forging folds can be formed on the pipe internal surface at pipe outer diameter decreasing by more than 60%.

Research on the Influence of Technological Forging Parameters on the Quality of Biphasic Titanium Alloys

The deflected mode (DM) during the preparation of the broach in the flat and combined baizes and also on radial forging machine (RFM) was investigated for creating the rational technology of a broach and determining the optimum size of the angles of rotation and single squeeze reduction. The quantitative data was obtained by the method of final elements and the MSC.Super Forge program; the main consistent patterns of stress–strain state (SSS) distribution and temperature while modeling forging in flat and combined baizes, also on RFM with various angles of rotation and sizes of squeeze reduction were determined. The rational trial technology of forging of biphasic titanium alloys was developed and tested.

A New Approach to Precision Cropping with Radial Forging

This paper presents a new approach to precision cropping with radial forging, it skillfully utilizes the stress and strain concentration effect of the prefabricated V-shaped notch and the principle of the radial-forging machine to achieve the regular fracture of metal bar. The basic working principle of the new radial-forging cropping method is discussed in detail. Moreover, the distribution of the radial displacement loads is discussed in detail, and the loading rules are clearly explained under the conditions of the single cropping die, two cropping dies, three cropping dies and four cropping dies, as well as the radial-forging loading sequence. The model and equation of the movement with the radial-forging are established, the feasibility analysis of the radial-forging cropping method is carried out, which is in agreement with the experimental results.