In the process of high-speed wire-rod rolling, pre-finishing mill can improve the precision of the working piece to guarantee the product quality and avoid possible operation failure during the finishing mill section.
The structure of framework
Its structure is two horizontal and two vertical (horizontal-vertical-horizontal-vertical; H-V-H-V) cantilever type, it is very compact, and the weight adjustment is more precise and reliable, and so to avoid possible twist rolling.
Pre-finishing mill is composed by two horizontal mills, three vertical loops, two vertical mills, safety cover and so on.
The role of transmission box is to transmit the moment outputted by reduction gear and motor to roll shafts. Horizontal box has a pair of cylindrical bevel gears; Vertical box has a pair of additional spiral bevel gear beside a pair of cylindrical bevel gear. The spiral bevel gear speed ratio of the two vertical transmission boxes is different.
Each roller box has one upper roll shaft and one lower roll shaft; They are not meshed, and driven by a pair of cylindrical bevel gears in the transmission box.
The roller box is installed with flange in plug-in method,
And convenient to assembly and disassembly, the roller box and transmission box are individual unites, during the installation, assemble the roller box and transmission box at the first stage and then fix the roller box inside the transmission box with screw bolt, the roller box is positioned by two locating pins to obtain accurate position. In this way, the installation can be done easily and with a shorter time, meanwhile, the pipework on the panel is reduced and make it easier for failure handling.