Friction coefficient forecasting and setting method for cold-continuous-rolling high-speed rolling process

A technology of friction coefficient and rolling process, which is applied in the field of cold rolling production process, can solve the problems that have not made obvious progress

Inactive Publication Date: 2007-08-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For research in this area, the former Soviet Union actually started in the 1970s, but did not make significant progress. The main literature can be found in "Rolling Process" published by Meta

Method used

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  • Friction coefficient forecasting and setting method for cold-continuous-rolling high-speed rolling process
  • Friction coefficient forecasting and setting method for cold-continuous-rolling high-speed rolling process
  • Friction coefficient forecasting and setting method for cold-continuous-rolling high-speed rolling process

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Effect test

Embodiment 1

[0078] According to field experience, in the process of continuous cold rolling, in order to reduce the surface temperature of the roll and the strip, reduce the friction coefficient and friction force on the contact arc surface of the deformation zone, prevent the metal from sticking to the roll surface and reduce the wear of the roll, It is often necessary to spray a large amount of emulsion on the surface of the roll and the strip. In this way, in the high-speed rolling process of the cold tandem mill, the strip and the roll are not in direct contact, but through a certain thickness of lubricating oil film as a medium, so the value of the friction coefficient during the rolling process is almost completely determined by the contact surface According to the thickness of the lubricating layer, the state of the friction in the rolling deformation zone and the change trend of the friction coefficient can be simply judged. For example, as the thickness of the lubricating layer i...

Embodiment 2

[0125] Generally speaking, for the high-speed rolling process of cold tandem rolling, one of the purposes of establishing the friction coefficient mechanism model is to realize the online prediction of the friction coefficient in the roll gap according to the known rolling process parameters and lubrication process parameters .

[0126] Fig. 3 is a flow chart of on-line forecasting and setting calculation of the friction coefficient of the tandem cold rolling mill in a preferred embodiment. This embodiment is used for online prediction and setting of the friction coefficient in the roll gap in the high-speed rolling process of cold tandem rolling.

[0127] First, in step 41, the main equipment parameters of the stand to be predicted in the tandem cold rolling mill are collected, including the radius R of the work roll, the original roughness Ra of the work roll r0 , Work roll roughness attenuation coefficient B L , embossing rate K rs and other parameters;

[0128] Subsequ...

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Abstract

The invention is a method for forecasting and setting friction coefficient in the cold continuous rolling high speed rolling course, executing on computer system the following steps of: a. collecting main equipment parameters of a cold continuous roller specific frame; b. collecting main lubricating process parameters of the cold continuous roller specific frame; c. collecting n groups of actual rolling process parameters of the cold continuous roller specific frame; d. according to the field experimental data of a specific leveler, establishing a plate surface roughness forecasting model for the specific leveler; e. using a, b as friction coefficient mechanism model parameters and to-be-found variants, constructing a friction coefficient mechanism model reflecting basic function relation between friction coefficient and lubricating oil film thickness; f. substituting the friction coefficient mechanism model parameters into a function equation reflecting relation between friction coefficient and lubricating oil film thickness and obtaining a friction coefficient forecasting and setting model in the cold continuous rolling high speed rolling course; and g. on-line forecasting and setting the friction coefficient in the cold continuous rolling high speed rolling course.

Description

technical field [0001] The invention relates to the field of cold tandem rolling production technology, in particular to a method for predicting and setting the internal friction coefficient of roll gaps in the high-speed rolling process of tandem cold rolling. Background technique [0002] The continuous cold rolling process is shown in Figure 1. The strip 1 is uncoiled from the uncoiler 2 and sent to the frame 3#~3i. After being rolled by multiple stands, the strip 1 reaches the specified thickness and is sent to the coil. Take machine 4 and rewind. The rolls of each stand include backup rolls 4 and work rolls 5 , wherein the work rolls 5 are in direct contact with the surface of the strip 1 . [0003] According to on-site production experience, it can be known that in the process of continuous cold rolling, the main factors affecting the friction coefficient are pass reduction rate, rolling speed, thickness of the entrance and exit of the frame, strip deformation resista...

Claims

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Application Information

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IPC IPC(8): G06F17/50G05B17/02
Inventor 白振华
Owner YANSHAN UNIV
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