Bars reducing and sizing mill

Abstract

The invention discloses a bars reducing and sizing mill which is of a short stress line type. The bars reducing and sizing mill comprises a roll-gap adjuster, a pull rod assembly, a frame, a beam, a roll assembly and a guide beam. The roll assembly comprises an upper roll assembly and a lower roll assembly and further comprises a pull rod, butterfly spring absorbers and a spherical anti-axial play device; the butterfly spring absorbers are disposed at upper and lower ends of the pull rod and used for eliminating a gap between the pull rod and a copper nut; the spherical anti-axial play device is used for eliminating an axial gap between the pull rod and a bearing block; the butterfly spring absorbers surround the pull rod; the pull rod assembly allows a central distance of upper and lower rolls of the mill to change by 0.1mm.

Description

technical field [0001] The invention relates to a rod reducing and sizing machine. Background technique [0002] At this stage, the products of domestic large-scale and wide-ranging bars are low-grade, poor in quality and stability, and cannot meet the needs of national economic development. There is an urgent need to produce products such as 400MPa and above high-strength threaded steel bars, and simple bars are used in the bar production line. The material reducing and sizing mill, instead of the ordinary short stress line rolling mill, is used in the bar finishing mill. It is arranged alternately horizontally and vertically, combined with the vertical and vertical conversion stand of the rolling mill, to realize the combination of no torsion / micro tension for the bar, which can greatly increase the product size. Requirements for precision, surface quality and tissue performance. Contents of the invention [0003] In view of the above problems, the present invention pro...

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Problems solved by technology

[0002] At this stage, the products of domestic large-scale and wide-ranging bars are low-grade, poor in quality and stability, and cannot meet the needs of national economic development. There is an urgent need to produce products such as 400MPa and above high-strength threaded steel bars, and simple bars are used in the bar production line. The material reducing and sizing mill, instead of the ordinary short stress line rolling mill, is used in the bar finishing mill. It is arranged alternately horizontally and vertically, combined with the vertical and vertical conversion stand of the rolling mill, to realize the combination of no torsion / micro tension for the bar, which can greatly increase the product size. Requirements for precision, surface quality and organizational properties

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