DD268178A1 - APPENDIX FOR ADJUSTING VERY HARD STEELS AND SPECIALTIES - Google Patents

Abstract

The plant is used to adjust very hard steels and special materials and can be used next to Kuehlbettscheren in rolling mills next to a conventional finishing. Rolling mills made of hard steels and special materials are heat-treated from the rolling heat and processed into crack-free, straight finished bars with a quality finish. This is done either by a arranged after a flying hot cutting device continuous furnace for the treatment of Fertigstablagen or instead by several Gluehoefen or Abkuehlkammern for the treatment of packaged Fertigstaeben or by a controlled Abkuehlung of distant Fertigstaeben on Querfoerdereinrichtungen with the respective preceding and following Transport, processing and loading facilities achieved. Fig. 1

Description

For this 2 pages drawings

Field of application of the invention

The plant 3 is used to adjust very hard steels and special materials and can be oingeserzt following cooling bed shears in rolling mills.

Characteristic of the known state of the art Hot rolled mass steels are made by known methods and with proven equipment in hot rolling mills

adjusted. The standard quality requirements for the finished product, such as straightness, length tolerance of bar ends,

Squareness of the face, crack-free are respected. Certain quality and Ede'-steels become so hard when cooling on the cooling bed that dia finished rods after cutting

with the cold shear no longer meet the standard quality requirements.

When cutting at room temperature, the bar ends of these steels split and cracks occur before the further processing

lead to uneconomic rework.

The sawing of this quality and stainless steel requires a high expenditure on equipment, tools and for the Soundproofing. Furthermore, in addition to the low productivity, hunting does not result in a quality-compliant cut due to the occurrence of saw flags

guaranteed.

Although cut-to-size can achieve a quality-appropriate cut, the low productivity hinders its use in

highly productive plants.

When cutting such steels at final rolling temperature with the cooling bed shear in manufacturing, although no cracks

the rod ends, but the required length tolerances can not be met, there are also deformed, non-rectangular cutting surfaces and bent rod ends.

Goal d '', invention

The aim of the invention is the quality adjustment of hot-rolled chairs of high strength and special materials.

Explanation of the essence of the invention

The invention is based on the object of completing a conventional finishing by a system with which the production of finished rods of hard steels, such as roller bearing steels, tool steels, high-alloy steels, high-speed steels and special materials to quality semi-finished products according to dimensions and structure, taking advantage of Walzhitze is made possible for the subsequent annealing process.

According to the invention, this object is achieved in that behind a cooling bed shear following a arranged in the feed roller table to a finishing switch a casserole and braking system for long rods abgabeseitip befindlichem with Stablagen-ammler and limited by stop with driver and einar flying warming device for finished lengths versehener Connecting longitudinal conveyor for rod shelves, and in the area between the hot cutting device and stop of the longitudinal conveyor on the one hand a Pakotsammler for residual rods and on the other hand either a continuous furnace for the thermal Bohandlung of distant finished shelves or more annealing or Abkühlkammprn for the thermal

Treatment of packaged Fertlgstäben or more cross conveyors for controlled cooling of distanced Fertigstsben with the respective leading uowio subsequent transport, processing and loading devices are arranged.

In this case, the casserole and brake system, the Sta'jlagensammlar and the Qi erfördereinrichtungen have trained cover, ventilation devices, heaters and temperature indicators.

Auafuhrungsbeisplele The invention will be explained in more detail in several exemplary embodiments. The accompanying drawings show ') In the

Fig. 1: a plan view of the plant, Ausführungsbeii iiel associated with continuous furnace for distanced finished; 2: a partial plan view, exemplary embodiment with associated annealing furnaces or cooling chambers for packaged finished rods, FIG. 3: a partial plan view, exemplary embodiment with assigned transverse conveyors for controlled cooling of detached finished pieces.

From Fig. 1 it can be seen that in addition to a conventional finishing 1 according to the invention, shown in more detail below Plant is arranged, which is achieved via a switch 2. The soft "2 is in üufuhrrollgang 3 between the arranged after the finishing stand 4 cooling bed shear 5 and the

initially mentioned finishing 1.

To the switch 2 include a casserole and brake system 6 for long rods with the discharge side befindlicher rod deposit collector. 7

and a limited by stop 15, provided with drivers 13 and a flying hot cutting device 14 for manufacturing longitudinal conveyor 12 for rod shelves.

On the longitudinal conveyor 12, in the area between the hot cutting device 14 and stop 15, on the one hand, a package collector 18

for PeststSbe and endererseitn either a continuous furnace 21 for the thermal treatment of distant Fertigstablagen or more annealing or cooling chambers 27 for the thermal treatment of packaged finished rods or more

Cross conveyors 28 for controlled cooling of distant finished rods with the respective leading and

subsequent transport, processing and loading devices 19,20,22 to 26,29 arranged.

The casserole and brake system 6, the rack accumulator 7 and the cross conveyor 28 have covers 8, Balüftungsvorrichtungen 9, 10 heaters and temperature indicators 11 on. In detail, the continuous furnace 21 according to the embodiment of FIG. 1, a transfer device 19 and a Entry device 20 for distanced Fertigstablagen vo ogestellt and a discharge device 22, a multi-core Straightening machine 23, a package picker 24, Paketier- and mdemaschinen 25 and at least one collecting grate 26 for packages

narhgeordnet.

From the embodiment shown in Fig. 2 it can be seen that the annealing or cooling chambers 27 a Packet collector 24 for finishing bars, packetizing and binding machines 25 upstream and a Nachpaketier- and binding system 29th

and eh collective grate 26 are arranged downstream for packets.

The embodiment of Fig. 3 shows that the Guerfördereinrichtungen 28 except the nonexistent Straightening machine same>. ^; inrichtunrjen as the continuous furnace 21 of FIG. 1 are upstream and downstream. In the embodiment shown in Fig. 1 for quality and stainless steels, one exiting the finishing stand 4 is shown Walzader shared with the Kom-scissors 5 in long lengths and fed via the switch 2 the casserole and braking system 6. The incoming single bars are braked regardless of their speed so that they with at standstill

their tips are at the end of the system and can be transferred to the rod storage collector 7 while maintaining their defined end position. Here they are placed with a certain division to each other, which is dependent on

Rod cross-section and the processing possibility of the following equipment. If a necessary for further processing Stablage has been formed on the rod storage collector 7, this is on the Pass longitudinal conveyor 12. The casserole and brake system 6 for individual bars and the bar stock collector 7 are equipped with temperature control devices

Provided. The existing cover 8, ventilation 9 and Heiworrichtungcm 10 are about

Temperature indicators 11 controlled in such a way that did high material temperature as evenly as possible over length and Width of the rod rests is maintained to an optimum processing temperature corresponding to the material quality

maintain.

The Stablagentransport on the longitudinal conveyor 12, in particular in the Restlagenverarbeitung is by the driver 13th

supported. The tip of each bar tray is scooped up with the flying warm cutter 14. The shed ends fallon in the Schopf- and scrap removal with mechanized sampling 17.

The finished cut is made to comply with the length tolerances by defined driving against the stop 15. After splitting

each Stablage in finished lengths, the remaining ends are thrown with a pusher 16 in the scrap removal 17 or the

Packet collector 18 fed to residual bars. When cutting nit the flying hot cutting device 14 can be used without stop 15 when the driver 13th

equipped with a measuring roller. Each leveling of spaced finished rods with finished length is combined with the

Transfer device 19 and the entry device 20 passed into the continuous furnace 21 for heat treatment. The rolling rods still have such high temperatures because of the short processing paths and the temperature control that only

low energy must be expended for the controlled heat treatment, in which the structure required for further processing is produced while avoiding cooling cracks.

The heat-treated finished shelves are fed to the discharge device 22 of the multicore leveler 23

and directed.

The thus heat-treated from the rolling heat, provided with a quality finish, crack-free and straight Finished rods are now collected in the package collector 24 to flush packages, with the packaging and binding machines 25th

packaged and bound and stored on the collecting rack 26.

In the exemplary embodiment according to FIG. 2, the finished rods taken from longitudinal fabric eggs 12 have been connected to the package collector 24

collected and bound with the Peketie. · and binding system 25 to parcels. These packages are annealing furnaces or

Cooling chambers 27 supplied, ven'igart cooled and, if necessary, post-processing in the post-packaging and binding system 29 and

stored on the collecting rack 26.

In the exemplary embodiment according to FIG. 3, finished parts are removed from the conveyor 12 with the entry device 20

fed to the cross conveyor means 28 for controlled cooling.

This continuous cooling unit for single rods is equipped with equipment; ur temperature control like Covers 8, ventilation devices 9, heaters and temperature indicators 11 equipped. The finished sticks

are fed by a discharge device 22 and a package collector 24 to the packaging and binding machines 25, 2u

Packages bound and stored on headers 26.

Claims (2)

1. Plant for adjusting very hard steels and special materials, characterized in that behind a cooling bed shear (5) following a feed roller table (10) to an adjustment (1) arranged switch (2) a casserole and braking system (6) for long rods with discharge side befindliches rod storage collector (7) and a limited stop (15), provided with driver (13) and a flying hot cutting device (14) longitudinal conveyor (12) for rod storage, and in Gereich between the hot cutting device and stop the longitudinal conveyor on the one hand On the other hand either a continuous furnace (21) for diathermic treatment of detached finishing racks or more annealing or cooling chambers (27) for the thermal treatment of pektierten finishing bars or more cross conveyors (28) for controlled cooling of distant finished bars with the each preceded and subsequent Transport, processing and Verlaaeeinrichtungen are arranged. 2. Installation according to claim 1, gekannzeichnet in that the casserole and braking system (6), the rod storage collector (7) and the transverse conveyors (28), covers (8), ventilation devices (9), heaters (10) andTemperaturindiketoren (11) respectively.