SU725730A1 - Device for supplying technological lubricant on rolls of rolling mill - Google Patents

Description

one

The invention relates to rolling production, in particular, to devices for supplying lubricant to rolls.

Apparatus for supplying lubricant to rolls of a rolling mill having lubrication nozzles are known. Highway lubrication supply, control and stop valves 1.

The known devices do not allow varying the amount of lubricant supplied when changing the rolling speed, do not provide warning of possible slippage of the rolls along the strip during hot rolling with process lubricants and do not: allow automating the lubricant supply process.

A device for feeding technological lubricant to mill rolls is known, which contains an axial pressure roller with a braking mechanism and a lubricant consumption regulator and a collector 2 connected to the lubricant consumption regulator. During rolling, the roller is pressed against the roller by force. P and rotates with it; The force P is created either under the action of the force of the tin of the roller, or under the action of some pressing force. In this case, to rotate

roller with roller should comply with the condition

f.P-r Mch. where f is the coefficient of friction between the roller

and roll;

g - the radius of the roller; MT - brake ring on roller shaft. , Under the conditions when P, g and -Mt will be constant values, the value that determines the rotation of the roller will be the coefficient of friction f, which depends on the size of the lubricating layer. The lubricant flow controller is coupled to the roller according to the feedback principle: the thicker the lubricant layer, the slower the roller rotates and the lower the lubricant supply through the regulator, the faster the roller rotates and the more lubricant flows to the mill roll through the regulator.

Moreover, the thickness of the lubricating layer can be controlled by changing the braking moment Mt produced by the braking device, as a result of which it is possible to prevent the work rolls from slipping along the strip during the rolling process.

Ned, the rest of the known device is that the speed of movement of the roller by

Claims (2)

The length of the roll barrel at 725,730 is not controlled at any time and will be determined by the average coefficient of friction between the contacting surfaces of the roll and the roll. The coefficient of friction will vary depending on the amount of lubricant supplied, which is constant at each time point along the length of the roll barrel, and on the surface roughness of the roll barrel. The value of roughness along the length of the roll barrel can vary considerably. The uneven distribution of the roughness along the length of the roll barrel and its concacting radius is determined by the uneven generation of the working surface of the roll during rolling and other reasons. Due to the fact that the thickness of the lubricant layer and the roughness of the working surface of the mill roll determine the value of the coefficient of friction, it is necessary to have the thickness of the lubricant layer along the length of the roll barrel as a function of the change in the roughness value. - - - The purpose of the invention is to save grease by ensuring its optimum flow rate across the width of the strip, depending on the varying roughness along the length of the roll barrel. This goal is achieved by the fact that in the device for supplying technological lubricant to mill rolls containing an axle pressure roller with a brake mechanism and a lubricant flow controller and a collector according to the invention connected to the lubricant flow regulator, the pressure roller is made integral with the possibility of independent rotation each part and with an independent for each part a brake mechanism, a lubricant flow controller and a collector. The drawing shows a device for the supply of technological lubricant to the rolls with a roller consisting of two parts. The device contains a pressure roller consisting of two parts 1 and 2, each of which sits on its axis 3 and 4. On axis 3 and 4, the corresponding brake mechanisms 5 and 6 and the lubricant flow controllers 7 and 8 are installed. 3 and 4 are hollow, and the axis 4 is made in the form of a slide bearing and is mounted on the axis 3, inside which passes the axis 9 common to both parts of the roller; Lubrication flow controllers 7 and 8 are connected to one side of the lubrication supply pipe 10, and on the other hand, the corresponding Manifolds 11 and 12 are connected to supply lubricant to the roller. The number of parts from which the roller can be made is determined by the structural and technological especially of the rolling mill .; . ,, The proposed device works in the following manner. Before rolling, the takeaway device is pressed onto the working surface of the mill roll 13 and the pressure roller with its parts 1 and 2 is in contact with this surface. When rolling, parts of roller 1 and 2 interact with the working surface of rolling roller 13 and rotate synchronously with it due to frictional friction forces between the contacting surfaces of roller parts 1 and 2 and rolling roller 13. If the roughness of the section, of the working surface with which part 1 contacts the more the roughness of the section of the working surface with which the part 2 contacts, then the part 1 will rotate at a higher speed due to the greater roughness, i.e. the coefficient of friction, of the surface of the roll. Due to the fact that part of the roller 1 is rigidly connected with its lubricant consumption regulator 7, an increase in its rotational speed will lead to an increase in the amount of lubricant through the collector 11 on this roll surface. Thus, the thickness of the lubricant layer is adjusted along the length of the roll barrel, depending on the change in the roughness value both along the rolling radius and along the length of the roll barrel. The amount of lubricant captured by the surface of the mill roll depends significantly on its microgeometry and roughness. The greater the roughness of the roll, the greater the amount of lubricant captured and passes into the deformation zone. During hot rolling, the development of rolls and an increase in their surface roughness occur. In addition, in almost all cases, the development of the width of the barrel rolls of sheet mills is extremely uneven for both workers and support rolls. The gripping ability of such mined surfaces is significantly (2-4 times) higher than the rest of the roll and to prevent their further intensive development, more lubricant is required. If a non-composite roller is used, it will apply a uniform layer thickness over the entire width of the roll. In this case, there will be an excess amount of lubricant for the unmounted parts of the roll, and an insufficient amount for the developed ones, which will lead to a further, more pronounced uneven development of the roll. When orienting the amount of lubricant supplied over the developed part of the roll, the consumption of lubricant will increase 1.5–2 times and there is a danger of the rollers slipping. When using the proposed device, the lubricant across the width of the roll will be supplied differentially, depending on the states of the surface along the width of the rolls. As a result, the consumption of lubricant can be reduced by approximately 1.5 times. Apparatus of the invention for supplying technological lubricant and mill rolls comprising an axle-mounted pressure roller with a brake mechanism and a lubricant consumption regulator and a collector connected to the lubricant consumption regulator, in order to save lubricant by ensuring optimum width consumption strip, depending on the varying roughness of the roll, the pressure roller is made composite with the possibility of independent rotation of each part and with independent brake mechanism for each part IOM, lubricant flow regulator and the reservoir. .-; - Sources of information taken into account during the examination 1. Grudev A. P., Tinik V. T. Technological lubricants in the rolling industry. M., “Metallurgists, 1975.  2. For registration number 23970397 for which the USSR author's certificate was issued. 1 II / If /, ll / 1 J I - /: - I I / / 7 +