RU2310536C2 - Roller table of shape bending light type mill for transporting shapes - Google Patents

Abstract

FIELD: plastic working of metals, possibly manufacture of commercial bent shapes.

SUBSTANCE: roller table is arranged behind last stand of mill and it includes rollers; group type drive unit; deflecting member in the form of rectangular plate of predetermined height spaced by predetermined distance from last stand depending upon length of shape and mounted with possibility of rotation. Drive rollers are cylindrical ones and they are mounted by cantilever fashion in horizontal supporting sections.

EFFECT: simplified reduced-cost operation of roller table.

2 cl, 1 ex, 1 dwg

Description

The invention relates to rolling production and can be used in the manufacture of high-quality bent profiles on light type mills.

One of the obligatory elements of rolling mills (including roll forming) are transport conveyors, in particular the discharge conveyors located behind the last stand of the mill and used to move finished profiles to pockets where they are packaged in bundles. Most often, live rolls contain cylindrical drive rollers.

The main design features of the existing roller tables are described, for example, in the reference manual, under the editorship of E.S. Rokotyan “Rolling production”, vol. I, M .: Metallurgizdat, 1962, p. 291-294.

A device is known for transporting sheets of a rolling mill, comprising rollers with plastic discs with ring magnets between them (see Pat. Czechoslovakia Patent No. 108261, class B21B, dated August 15, 63), which prevents buckling and slipping of the transported sheets.

The disadvantage of this device is the relative complexity of its design, which increases the cost of its manufacture and operation.

The closest analogue to the claimed device is a roller table used in a roll forming mill (SU 1611496 A1, B21D 5/06, 12/07/1990, 2 pp.).

The roll of the profile bending mill for transporting the profile is located behind the last stand of the mill and contains drive rollers,

A disadvantage of the known roller table is the relative complexity of its design, which increases its cost and makes it unacceptable for a roll forming mill of a light type.

The technical task of the invention is to reduce production costs by reducing the cost of equipment while maintaining its functional properties.

To solve this problem, a light type roll-forming roll mill for transporting a profile located behind the last stand of the mill, containing drive rollers, unlike the closest analogue, is equipped with a chipper in the form of a rectangular plate, the height of which is equal to the maximum height of the transported profile, made with the possibility of installation at a given the distance from the last stand, depending on the length of the profile and rotation in the horizontal plane at an angle of 45 ° ... 75 ° between the transverse axis of the roller table and the bump plane , drive rollers are made cylindrical and mounted cantilever in horizontal support sections, and their drive is made as a group, the roller table drive can be chain using a Gall roller chain.

The essence of the proposed technical solution is to simplify the design of the roller table while maintaining its functional properties.

This is achieved, firstly, by applying a group drive rollers; secondly, by cantilever mounting of each roller in only one support and, thirdly, by installing the simplest chipper, directing the profiles emerging from the last stand of the mill into the pocket of the finished product. Most of the existing outlet conveyors of roll forming mills use special chain devices with cams (slappers) for this - see, for example, the book under the editorship of I.S. Trishevsky "Production of bent profiles (equipment and technology)." M .: Metallurgy, 1982, p. 151-153.

In addition, the inventive roller conveyor has a chain drive, very simple to manufacture and operate.

The proposed roller table is schematically shown in figure 1.

Each cylindrical roller 1 of the roller table is mounted cantilever in a horizontal support section 2, and an asterisk 4 for the drive chain 5 is located at the end of its axis 3 passing through the support. Between the rollers 2 there is a fender 7, the location of which relative to the last stand 8 of the mill can be changed (i.e., the value of L changes). In addition, the angle α between the chipper and the y-axis of the roller table can vary (within 45 ° ... 75 °).

Rollergang works as follows.

The moving rod of the profile (the direction of its movement is indicated by the arrow x) hits its front end into the bump 7 and, under the influence of reactive force, shifts (downward in Fig. 1) with a drop in the finished product pocket (not shown).

The value of L is changed depending on the length of the rod, and the angle α - depending on the desired location of the falling rod in the pocket. This position can also be changed within certain limits by changing the speed of the bar along the live table.

An experimental verification of the proposed roller table was carried out on the roll forming unit "1-4" of OJSC "Magnitogorsk Iron and Steel Works". To this end, during the transportation of bent profiles with a weight of up to 50 kg, various designs of the discharge roller table were tested (on roll forming mills of a light type, the roller tables are not installed between stands because of the small distance between them - 0.5 ... 0.8 m).

The best results (the absence of “drilling” of the rods and their getting into the desired place in the pocket of the finished product) were obtained at angles α = 45 ° ... 75 °. At α <45 °, there were cases of stopping the rods ("drilling"), and at α> 75 ° most of them fell outside the pocket.

и установили, что минимально-достаточная величина L=

+(0,5...1,0) м. При высоте отбойника меньше высоты транспортируемого профиля наблюдались «забоины» на передних торцах штанг (от верхней грани отбойника).The value of L was changed depending on the length of the rods

and found that the minimum sufficient value L =

+ (0.5 ... 1.0) m. When the chipper height is less than the height of the transported profile, “nicks” were observed at the front ends of the rods (from the upper face of the chipper).

The cantilever mounting of the rollers in the bearings, as well as their common chain drive did not cause any difficulties in the operation of the roller table. Comparative tests of the well-known roller table (see above) were not carried out due to its unsuitability for transporting light bent profiles.

Thus, the pilot test confirmed the acceptability of the technical solution found to achieve the goal and its advantages over the well-known object, taken as the closest analogue.

According to the Central Control Laboratory of OJSC MMK, the use of the proposed roller table on light-type forming units will reduce production costs by reducing the cost of operating the roller table (and the initial cost of its manufacture) by approximately 5%, with a corresponding increase in profit from the sale of rolled products.

Concrete example

The roll of the high-grade roll-forming mill “0.7-3.0” is located behind the last stand and transports the finished rods with a maximum weight of 35 kg, a length of 3 m and a height of 60 mm.

All rollers are made with cantilever fastening in the support sections and with a chain drive (pitch roller chain t = 15,875 mm).

The flat chipper is installed at a distance of L = 3.5 m from the mill and at an angle of 60 ° to the transverse axis of the y-roll. The height of the chipper is 60 mm.

Claims (2)

1. Roller of a roll forming mill of light type for transporting a profile located behind the last stand of the mill, containing rollers and a drive, characterized in that it is equipped with a chipper in the form of a rectangular plate, the height of which is equal to the maximum height of the transported profile, made with the possibility of installation at a given distance from the last stand, depending on the length of the profile and rotation in the horizontal plane at an angle of 45 ° - 75 ° between the transverse axis of the roller table and the plane of the chipper, the drive rollers are made cyl indrical and mounted cantilever in horizontal supports - sections, and the drive is made as a group. 2. Roller according to claim 1, characterized in that the drive is made chain in the form of a roller chain Gall.