RU2309026C2 - Hot rolled coil strip cutting aggregate designed for sampling - Google Patents

Abstract

FIELD: rolled stock production, namely sampling strip of hot rolled coils before cutting said strips in cutting units or before delivering them to consumers.

SUBSTANCE: aggregate includes tilting apparatus, roller type uncoiling unit with clamping roller, shears for sheets with cleaning unit, feed rollers and stacking apparatus for sheets. Tilting apparatus is joined with uncoiling unit and they are arranged in the same framework. Uncoiling unit includes drive supporting rollers; on one of said rollers scraper with rocking drive is mounted. Uncoiling unit also includes stationary mounted straightening-bending roller, guiding straightening roller mounted with possibility of vertical motion, two lower straightening-bending rollers mounted under stationary roller in single-arm lever jointly secured to framework. One of said lower straightening-bending rollers is mounted with possibility of vertical motion. Clamping roller of uncoiling unit is mounted in lever jointly secured to crosspiece of sheet shears. Stationary straightening roller includes pickup for measuring length of cut sheets.

EFFECT: improved mechanization of cutting out sample of strip without using gaseous cutting procedure, less loss of yield, possibility for producing commercial products in the form of sheets from cut-off end portions of strip.

2 cl, 2 dwg

Description

The invention relates to the field of rolling production, in particular for sampling strips from hot rolled coils before cutting them on cutting or shipment units to the consumer.

Currently, hot-rolled sheet metal is shipped to the consumer both in the form of sheets and in rolls. To determine the actual mechanical properties of the strip before sampling them on cutting units or before shipping the rolled products to the consumer, sampling is carried out. According to the general rules for sampling from a roll of hot-rolled strip (ГЩСТ 7564-97), the sample must be cut out at a certain distance from the front end of the roll. At the request of consumers, this distance can vary from 2 m to 50 m from the front end of the roll.

Basically, sampling is carried out in sheet compartments by gas cutting of samples directly on rolls.

The disadvantage of this method is the gas cutting damage of several turns of the roll, since if, for example, the sample should be taken from the seventh turn of the roll, then six previous turns of the roll are cut in steps from the damage of the eighth turn. As a result, the strip with cut holes is substandard, which reduces the yield. In addition, the process of gas cutting in the workshop is environmentally friendly and pollutes the area with sludge.

Sampling is also possible on transverse cutting units (V. M. Fanshtein "Finishing of metal in sheet-rolling shops", Moscow, 1969, pp. 168-169, pp. 186-198).

The drawback of sampling on universal transverse cutting units is the irrational use of the unit, machine downtime when cutting samples, large waste to be cut off if it is necessary to take samples at the right distance, and the inability to roll the strip back into the roll after sampling.

The technical problem solved by the invention is the mechanization of the process of cutting a strip sample without using gas cutting and increasing the yield by eliminating strip damage, reducing trim and obtaining marketable products in the form of sheets from the trimmed ends of the strip ..

The technical problem is achieved in that the selection (cutting) of strip samples from hot rolled coils is performed on a separate cutting unit, which contains a tipping device, a roller unwinding device with a pressure roller, in which, according to the proposal, the tipping device is interconnected with the unwinding device and located on one frame, wherein the unwinding device comprises driving support rollers, on one of which a scraper with a swing drive is pivotally mounted, a fixed-bend is stationary mounted one roller guiding the right roller mounted with the possibility of vertical movement, and two lower right-bending rollers mounted under the stationary roller on the single-arm lever pivotally mounted on the frame, one of which also has the possibility of vertical movement, and the pressure roller of the unwinder is mounted on a lever pivotally mounted on a beam of scissors.

The technical problem is also solved by the fact that the stationary stationary roller of the unit contains a sensor for measuring the length of the cut sheets.

The advantage of this method is the ability to mechanize the process of cutting out samples of strips from hot rolled coils, to eliminate pollution and metal damage, to increase the yield of products by obtaining marketable products in the form of sheets from the ends of strips.

An analysis of the scientific and technical literature showed that there are no aggregates with the above set of features, therefore, the proposal meets the requirements of novelty.

Figure 1 shows the unit sampling strips from hot rolled coils, General view (longitudinal section).

In Fig.2 - view A in Fig.1.

The unit for sampling strips from hot-rolled coils contains a tilting device interconnected with a roll unwinder and a take-up roll 1, sheet shears 2 of a traditional design with a harvesting device, feed rollers 3 of a traditional design and a stacker for sheets 4 of a traditional design.

The overturning device, interconnected with the unwinding device by the receiving roller 1, consists of a frame 16, a tilter assembly 5 driven by hydraulic cylinders 6, a drive support roller assembly 7, on one of which a scraper 8 is pivotally mounted with a swing drive from the hydraulic cylinder 9, the drive assembly is correctly- bending rollers, consisting of a stationary straight roller 10 and a guide straight roller 11 with the possibility of vertical movement from the hydraulic cylinder 12, two lower drive correct bending rollers 13, one of which 17 has the possibility of vertical movement mounted on a single-arm lever 14 with a displacement drive from the hydraulic cylinders 15. The lever 14 is mounted on the frame 16 by means of a hinge 18. All the rollers are driven in rotation from the electric drive 19 through cardans.

A sensor for measuring the length of cut sheets and samples is installed on the correct stationary roller. A single-arm lever with a pressure roller 20 driven by a hydraulic motor is pivotally mounted on the upper part of the beam of sheet shears 2. The movement of the pressure roller 20 is carried out from the hydraulic cylinders 21, pivotally mounted in the upper part of the feed rollers 3.

The unit for sampling strip from hot rolled coils works as follows.

The rolls of the hot-rolled strip are fed one at a time in a vertical position to the tilter assembly 5 of the universal roller unwinder-rewinder 1, while the pressure roller 20 is retracted from the tilter assembly 5 to its highest position. The rolls from a vertical position are edged horizontally and mounted on the support rollers 7 of the unwinder, which by turning the roll set it in a position convenient for bending the end of the roll. The drive pinch roller 20 is lowered onto the roll, the end of the roll is pulled onto the scraper 8, which (if necessary) separates the end of the strip from the roll and then the strip is fed into the opened right rollers 10, 13, 17, after which the right rollers are closed and the right 10 are rotated simultaneously, 13, and 17, supporting 7 and pressure 20 rollers, the strip is fed to the scissors 2.

The front substandard end of the strip is cut off, which is discharged into the pallet and then removed from the pallet.

After pieces of the front end, the strip on the scissors 2 is cut into measured lengths at the command of the sheet length measuring sensor.

After unwinding and pieces of the required strip length, a piece of sample is produced, which is dumped into the pallet.

After trimming the sample by simultaneously reversing the right-bending 10, 13, and 17 supporting 7 and pressing 20 rollers, the end of the strip is wound back into a roll, while the fluffing of the last turn of the roll is reduced, the extreme bending roller 17 rises to the upper position to bend the end of the strip along the radius the curvature of the roll.

After winding the strip, the pressure roller 20 is retracted, the roll is turned over from horizontal to vertical and with an electric bridge crane equipped with pincers, removed from the tilter unit 5 and transported to the warehouse.

As a result of the use of this invention, it becomes possible to mechanize the process of cutting out samples of strips from hot-rolled coils, to eliminate environmental pollution, reduce metal damage, increase the utilization (yield) of metal by obtaining marketable products in the form of sheets from the ends of strips.

Claims (2)

1. The unit for cutting strips of hot rolled coils, designed for cutting strip samples, containing a tilting device, a roller unwinder with a pinch roller, sheet shears with a harvesting device, feed rollers and a bale machine for sheets, characterized in that the tilting device is interconnected with the unwinder and is located on the same frame with it, while the unwinding device contains drive support rollers, on one of which a scraper with a swing drive is pivotally mounted, a specially installed right-bending roller guiding the right roller installed with the possibility of vertical movement, and two lower right-bending rollers mounted under the right-bending roller on a single-arm lever pivotally mounted on the frame, one of which also has the ability to move vertically, and the pinch roller of the unwinder is mounted on a lever pivotally mounted on the crosshead of the sheet shears. 2. The assembly according to claim 1, characterized in that the correct bending roller contains a sensor for measuring the length of the cut strip sheets.

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