Roller of three-roller planetary rolling mill

Abstract

The invention relates to a roller of a three-roller planetary rolling mill. The roller (1) is basically in a conical shape. The invention is characterized in that the roller (1) is divided into five regions from the tail part to the head part, and the five regions are sequentially a material inlet region (S), a deformation region (S1), a process region (S2), a sizing region (S3) and a material outlet region (S4), annular concavo-convex lines (12) are uniformly distributed in the radial direction on the conical surface of the roller (1) in the deformation region (S1) at intervals, and in addition, inclined lines (11) formed by the axial projection of the concavo-convex lines (12) are sinusoidal curves. Compared with the prior art, the invention has the advantages that the smooth feeding and continuous stable and efficient rolling of rolling element blanks can be ensured in the rolling process, in addition, the influence of the rolling element surface quality caused by the severe vibration of the blank deformation can be avoided, the thread pitch of the rolled pipe materials in actual operation is uniform and stable, and the service life of the roller is greatly prolonged.

Description

technical field [0001] The invention relates to a roll of a three-roll planetary rolling mill. Background technique [0002] The three-roller planetary rolling mill is widely used in rolling semi-finished products, finished pipes and bars with large reduction and high efficiency, and its core component - the roll is the key to controlling the quality of the rolled piece. The three conical rolls are arranged at 120° to each other, rotate (revolution) at a certain angle offset from the rolling center, and rotate around their own axis (autorotation) to automatically bite the rolled piece through the conical rolling deformation zone, although the contact surface is only A long and narrow strip, but the microscopic small deformation accumulates into the macroscopic instantaneous deformation of the rolled piece, and its deformation can reach more than 93%. Therefore, it is very important to ensure the smooth biting of the rolled piece billet and continuous, stable and efficient ro...

AI Technical Summary

Problems solved by technology

[0003] At present, the method usually used in biting is to increase the friction force. The Chinese patent application (application number 89102588.X) is to open a tangible groove in the biting and pressing area, but the groove top between the grooves must be overcome during the rolling process. Only then can it enter the next groove, so the deformation of the billet will severely affect the surface quality of the rolled piece

[0004] Utility Model Patent No. ZL02237667.4 discloses a roll of a three-roll planetary rolling mill for rolling copper and copper alloy pipes, which is divided into three areas from the tail to the head of the roll (deformation area, smooth area, and finishing area, respectively). ), the biting area is not specified, and a convex ring with a height of 1-5mm and a width of 1-15mm is added between the deformed area and the smooth area, and the groove between the grooves should also be overcome during the rolling process. The top can enter the next groove, affecting the surface quality of the rolled piece

[0005] A three-high planetary rolling mill roll disclosed in Chinese patent application (Patent No. ZL200620090623.3) is divided into four areas, namely the biting area, the concentrated deformation area, the flattening area and the rounding area, and the thread characteristics of the biting area To make specific explanations, but the four areas as a whole have not been fully explained, so in actual operation, the uniformity of the pitch of the rolled pipe is unstable, and the service life of each roll repair is generally only about 200 tons.

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