Device for replacing rollers of pilger seamless tube mill

Abstract

The invention discloses a device for replacing rollers of a pilger seamless tube mill. The device comprises a storage rack, an internal tube mill rail, a roller seat and a push-pull mechanism, wherein the storage rack is arranged on one side of a pilger seamless tube mill housing, and is provided with a rack rail at the upper part thereof; the internal tube mill rail spans the pilger seamless tube mill housing, and is mounted on the pilger seamless tube mill; the internal tube mill rail is communicated with the rack rail; a V-shaped groove is formed on the internal tube mill rail; rollers are loaded on the roller seat; idler wheels matched with the rack rail and the internal tube mill rail are mounted at the lower part of the roller seat; and the push-pull mechanism is arranged on the other side of the pilger seamless tube mill housing, and is connected with the roller seat. In the invention, the idler wheels are mounted on the roller seat and rolls on the internal tube mill rail and the rack rail; the V-shaped groove is formed on the internal tube mill rail; and when the pilger seamless tube mill is used for rolling the rollers, the idler wheels are positioned in the V-shaped groove, without bearing a rolling impulsive force, so that the rolling effect is ensured, the idler wheels are protected against damage, and the rollers are replaced in a rolling manner.

Description

technical field [0001] The invention relates to production equipment of seamless steel pipes, in particular to a roll changing device of a periodic pipe rolling unit. Background technique [0002] The periodic pipe rolling mill is an important equipment in the production of seamless steel pipes. Its function is to thin the pipe wall of the perforated hollow capillary pipe and control the wall thickness of the inner and outer diameters. The periodic pipe rolling mill needs to select different rolls when rolling different hollow capillary tubes, which requires changing the rolls of the pipe rolling mill. The rolls of the periodic pipe mill include upper and lower rolls with symmetrical passes and need to be replaced in pairs. Due to the large volume and quality of the rolls, the work of changing the rolls is very heavy. The traditional roll changing device adopts sliding roll changing, and a sliding seat is installed on the base of the pipe mill, and the bearing seat with th...

AI Technical Summary

Problems solved by technology

Due to the very harsh working environment of the periodic pipe rolling mill, the grease on the slide plate is easy to stick to dirt such as iron oxide scale and become invalid after being washed by the cooling water of the roll for a long time, resulting in difficulty in sliding the slide plate and poor sliding stability, which affects work efficiency and increases workload

In addition, due to the poor sliding effect of this replacement method, only one roll can be replaced each time, which further reduces the work efficiency

Finally, with this structure for changing rolls, the slide plate will be impacted by the rolling force when the pipe mill is working, so it is impossible to replace the rolls by rolling, and the slide plate itself is easily damaged by impact

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