Rational redistribution of waste of resources. Manufacturing of equipment for cutting machine

Almost all metal at OJSC «Byelorussian Steel Works» – management company of holding «Belarusian Metallurgical Company» includes today a mandatory physical-mechanical tests which allow to estimate the parameters of the raw materials, to know the reasons for loss of strength and determine operational characteristics. In the Central Factory Laboratory (CFL), laboratory of physical and mechanical tests (LPMT) for the preparation of samples of reinforcement equipment is used of knives in the cutting machine SIMA GEL-30 for cutting rebar from the mill 320 rolling shop № 1 with a diameter from 6 to 24 mm. In the drop-hummer shop annually discards off for scrap waste up to 50 knives. Hydraulic shears of drop-hummer shop used knives set of production of OJSC «Kobrin tool plant «SITOMO», made of steel grade 30ХСНВФА, according to the TU14-1-4461. The staff of the Central laboratory LFMI proposed to use waste knives drop-hummer shop for the manufacture of knives for the chopping of the machine SIMA GEL-30. On the basis of the conducted researches the technological scheme was developed for production of knives for the chopping of the machine SIMA GEL-30 cold cutting of reinforcing bar mill 320 the rolling shop № 1.

Modernization of No. 23 runway drives of 2800 HSM at sheet-rolling shop (LPZ-1) of JSC “Ural Steel”

Increasing of rolling and adjacent equipment operation reliability, decreasing of its emergency downtime, increasing of overall periods duration are actual tasks of personal of any sheet-rolling plant.Using data of the register of 2800 HSM of sheet-rolling shop (LPZ-1), JSC “Ural Steel”, the number and duration of downtimes of the mill No. 23 runway analyzed, caused by runway drive tooth coupling failure. The main reasons of tooth coupling failure determined. Modernization of No. 23 runway drives proposed, being its design modification by introducing of cardan shaft for rollers drives. This enabled for giving up the tooth coupling usage, pushing away the electric motors, that avoided water drops and vapor on them hitting, decrease unplanned equipment downtime. Certain parameters of drives determined and calculation of technical and economic indices before and after the runway drives modernization presented. The implementation of modernization actions resulted in a decrease of No. 23 runway repair and maintenance expenses, including the purchase and installation of the tooth coupling. The expenses for No. 23 runway drives modernization made1.7 mil Rubles and the payback period – 6 months.

A DETAILED STUDY OF THE PERFORMANCE AND OPTIMAL CHOICE OF ABRASIVE FOR WET GRINDING OF HIGH-ALLOYED STEELS

In the pipe-rolling shop, on the site of preparation of mandrels and disc saws were the centerless turning and grinding complex VT-8 «Hetran» for repair of mandrels are used, studies have been conducted to test experienced grinding belts. The choice was based on a comparative analysis of the work of experienced grinding belts with usual industrial grinding belts. The resistance of grinding belts for one mandrel is calculated. A positive result (economic effect) was obtained by using experienced grinding belts.

IMPROVEMENT OF CALIBRATION OF CONE-SHAPED ROLLS OF THE PIERCING MILL OF THE PIPE-ROLLING SHOP

The increase in operational durability of the technological tools of the piercing mill in the pipe-rolling shop and decrease in deficiency of produced pipes due to improvement of calibration of cone-shaped rolls is considered in the article. Increase in durability the piercing mandrels is evaluated as 1,3–4,3 times when using calibration of cone-shaped rolls with a smaller corner of an output cone. Improvement of quality of external surface of produced pipes was made due to application of experimental ring calibration of rolls. It is shown that this calibration demands big expenses of energy at the piercing.