SU984514A1 - Method of producing rolled sheets and rolling mill for performing same - Google Patents

Description

(54) METHOD OF MANUFACTURING SHEET RENT AND ROLL MILL FOR ITS IMPLEMENTATION

one

The invention relates to rolling production and can be used in the production of sheet metal on the walls of a wide standard size of sheets in thickness, or with an average order quantity.

A known method of producing sheets from the billet-card, obtained on the billet mill, including multiple crimping of the billet, trimming off-spec ends and cleaning the finished product from the line of the mill 1.

The disadvantage of this method is that it does not allow the production of a wide range of sheet thickness, down to thin, from an ingot on one single-mill mill, i.e., in a known method, two types of mill are needed to produce from an ingot of thin sheet ( billet) and sheet that, with a small amount of steam-. This (order for the required size) and a wide assortment in thickness is unprofitable.

A mill for rolling slabs is known, comprising a feeding roller conveyor, a reversing stand, a rolling roller conveyor with devices for cutting rolls and cleaning.

finished rental. Receivers of rolls are installed in front of the reversing cage, forming a series of parallel branches 2.

However, this mill does not provide production of sheets of a wide assortment.

S in thickness and width, since rolling cannot be achieved in it, cards received from the intermediate roll with the possibility of breaking the width due to deformation in the broadening passages.

10 The closest to the proposed technical solution is the method of rolling sheets on a single-stand mill, providing rolling of the cast billet in the reverse mode with broadening passes by cutting the roll, obtained5 from the blank, into individual cards 3.

Lita billet after multiple

compression in the reversing cage is fed to

scissors for cutting to individual cards,

which are then collected in the foot behind the cage.

20 After the set of the foot, it is rotated 90 ° with respect to the rolling axis for sheet rolling of cards with broadening passes.

Folders alternately as the roller table is released from the finished sheet.

received from the previous card, gives out skanted cards on the live rolls, where they are fed to the stand for multiple crimping to a given thickness, the finished sheet is moved to the scissors for cutting the front end and then to the harvesting device, where the finished sheet is removed (rolled up) with the stop for trimming back end and so on until all the cards obtained from one ingot are consumed. Then a new billet is assigned to the receiving roller table.

This method is carried out in a rolling mill containing a receiving roller table, a rolling roller conveyor behind it, a rolling stand following the rolling roller conveyor, after the rolling stand again the rolling roller conveyor continues, a scissors is installed, followed by a folding sheet stacker, a folding roller following the folding table. and located cleaning device. Moreover, the receiving, rolling and transport roller tables make up one common roller table.

The disadvantages of the prototype are that each subsequent card can be rolled only after all the auxiliary operations (stamping, centering, trimming, cleaning the finished product from the mill line, etc.) with the finished sheet obtained from the previous card, t . e. there are counter flows of cards coming in for compression on the one hand, and finished sheet coming in, for example, for winding on the other hand. This is especially negative when receiving a large number of cards from a single roll. In addition, the passage of cards through the cutting device is difficult due to the limitations of the cards in length.

The disadvantage is also the combination of cleaning (winding) the sheet and trimming its rear end, since it is necessary to stop cleaning (winding) the finished sheet into the role.

These deficiencies lead to poor performance.

The purpose of the invention is to increase the productivity of the mill by eliminating collision flows while simultaneously expanding the range of rolled strips.

This goal is achieved by the fact that, according to the method of sheet metal production in the mill line with a reversing stand, in which the workpiece is crimped to an intermediate roll, the roll is cut into sheet rolling, 90 ° of cards are rotated, the cards are assembled into side, sheet rolling on the finished size, trimming off-grade metal and cleaning the finished rolled product, roll before cutting into cards is given out for a stand in a plant, the stand of the stand and the roll are reversed, combining the movement of the roll to fly with his cutting on the cards, then each card is rotated 90 ° for a strait passage, after which the cards are collected in the stack, and by the fact that in a rolling mill containing a reversing cage, receiving, roll and transport conveyors, scissors, sheet spreading machine, rack, device to rotate the cards by 90 ° relative to the rolling axis and the device for finishing finished rolled products, the leaflet machine and the rack are installed in front of the cage from the side of the task of the initial billet, while the device for rotating the cards is made on the opposite side to fly and set between the cage and scissors, and the length of the transport roller table is at least equal to the largest length of the roll. FIG. 1 shows a flow chart of operations carried out according to the proposed method; in fig. 2 shows the layout of the rolling mill equipment.

The method is carried out as follows.

An ingot (A) is set on the receiving roller table,

5 which is moved to the cage where it is crimped several times (B), the resulting roll is moved through the cutting device without cutting and reversed towards the cutting stand (C) on the cards.

The cards are alternately moved to the cage and rotated 90 ° (E) in front of it (the length then becomes the width of the future finished sheet), after which the scanned cards are alternately compressed once (B) in the cage and moved to the sheet5 spreadsheet that puts (D) them B foot. Then the sheet {5askladchik issues (D) cards on a roller table, on which they move to the stand for repeated crimping (B) to a predetermined thickness, after which they go to the cutting device for

0 trimming ends and further to the cleaning device, where the finished sheet is removed (wound) (F) from the roller table. In this case, each subsequent card goes on rolling immediately after the free stand

5 from the previous card and so on until all the cards obtained from one ingot are consumed. Then a new bar arrives at the receiving roller table, etc.

The proposed device contains

0 receiving roller conveyor 1, located behind the receiving roller conveyor, leaflet 2 with stationary shelving 3, next to the leaflet carrier of rolling roller conveyor 4, located behind rolling roller conveyor rolling stand 5, behind which the device 6 for cards is installed 90 ° relative to the rolling axis and followed by rolling roll roller table 7, then scissors 8, then transport roller table 9, the length of which is not less than the length of the longest, the roller table is followed by the harvesting device 10. Moreover, the roller tables 1, 4, 7 and 9 constitute one common roller table.

Claims (3)

1. Method for producing sheet metal in a mill line with a reversing cage, including crimping the billet to an intermediate roll, cutting the roll into cards for sheet rolling, turning the cards 90 ° before the broadening passes, assembling cards to the side, sheet rolling to the finished size, trimming off-quality metal and cleaning of finished rolled products, characterized in that, in order to increase productivity by suing the flow of oncoming flows in the mill line while simultaneously expanding a range of rolled sheets, before cutting the roll is handed out to the grower for the cards, the stand and the roll are reversed, combining the movement of the roll to the stand and cutting it onto the cards, then each card is rotated 90 ° for a broadening passage, after which the cards are collected in the foot. P 2. Rolling mill containing reversing cage, receiving, rolling and transport roller conveyors, scissors, sheet-laying machine, rack, device for rotating cards by 90 ° relative to the rolling axis and device for cleaning finished steel, characterized in the leafletter and the rack are installed in front of the cage on the side of the task of the original blank, while the device for rotating the cards is made on the opposite side of the cage and installed between the cage and scissors, and the length of the transport is Ganga at least equal to the greatest length ra.skata. Sources of information taken into account in the examination 1. V. Century. Mills for rolling non-ferrous metals and alloys. LA., “Metallurgists, 1968, p. 126-128. 2. For the name of Germany No. 2137915, cl. B 21 B 1/02, 1979. 3. Technical project of the mill duo “800x3150, GIPROTSMO, arch. No. 1471-74, FIG. 72-1196, 1974. iUZ.I