RU2462515C1 - Pinch roll - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: device includes a housing, three drive and three pinch rollers with mechanisms of rotation and clamping. Clamping mechanism is designed as two power cylinders and crosshead moving relative to the vertical guide and pivotally connected with two balancers. Each power cylinder is pivotally connected to the housing and the balancer in the middle part. The middle pinch roller is mounted on the crosshead, and the end pinch rollers - at the free ends of the balances.

EFFECT: use of the invention provides synchronisation of work of power cylinders and uniform clamping of rollers to aluminium and flux cored wire.

6 cl, 8 dwg

Description

The present invention relates to the field of metallurgy, and in particular to devices for introducing aluminum and flux-cored wire into liquid metal for the purpose of deoxidizing, alloying and removing non-metallic inclusions.

A device for introducing wire into a metal is known, containing a rebel receiver with an unwinder, guides and feeding (drive and pressure) rollers located on a curved guide with a vertical direction of wire exit / Copyright certificate No. 1613496 (USSR), class. C21C 7/00, 01.24.89, publ. 12/15/90, bull. No. 46 /. The known device provides favorable conditions for unwinding and entering the wire into the metal, however, it is characterized by the complexity of the design, a large number of elements operating in dusty and high temperatures, and, as a consequence, the need for constant labor-intensive maintenance.

In this regard, in modern devices for introducing wire into liquid metal, pulling devices (tribing devices) with drive and pressure rollers located horizontally and far from the melt are used / Treatment of liquid steel with calcium-containing wire // Express Information TSNIITEityazhmash. Series 1. Issue 15. 1988, - 6 pp. /.

Of the known closest to the proposed technical essence and achieved results is a tribal apparatus containing three pairs of drive and pressure rollers, as well as a mechanism for clamping rollers with independent power cylinders and levers (for each roller) / Catalog "Tribal devices". Chepetsk Mechanical Plant. 2003-2004 - S. 10 /.

Its disadvantages include the limited reliability of the operation of the tribamer - the lack of synchronization of the cylinders, the unevenness of the pressure of the rollers to the feed wire and, accordingly, the risk of damage or slipping of the wire relative to the rollers.

The technical result of the invention is to reduce the number of required power cylinders, to ensure synchronization of their work and uniform pressure of the rollers to the wire, which improves the reliability of the structure and improves the stability of the wire feed.

The technical result is achieved by the fact that in a tribing machine for inputting wire into molten metal, comprising a housing, three drive rollers and three pressure rollers with rotation and pressure mechanisms, the pressure mechanism is made in the form of two power cylinders and a crosshead, movable relative to the vertical guide and pivotally connected to two balancers, each of the power cylinders pivotally connected to the balancer in the middle part and to the housing, the middle pressure roller is mounted on the traverse, and the extreme rollers are on the free ends of the ball Ansirs.

The swivel connection of each power cylinder with the balancer is made with the possibility of adjusting the position relative to the balancer.

Pinch rollers with a clamp mechanism can be located above or below the wire feed direction.

The balancers and the crosshead are equipped with height-adjustable stop screws that interact with the stops located on the body.

The traverse is made with a cylindrical shank interacting with the guide, which is made in the form of a linear plain bearing with an antifriction liner or two linear plain bearings with antifriction liners made of graphite.

The execution of the clamping mechanism in the form of a traverse, movable relative to the vertical guide and pivotally connected to two balancers, as well as two power cylinders pivotally connected to the balancers in the middle part and with the housing, and the installation of the middle pressure roller on the traverse, and the extreme rollers - on the free ends balancers can reduce the number of cylinders and ensure synchronization of their work, contribute to a more even distribution of the load on the wire, prevent crushing and increase reliability in regardless of the type, quality and cross-section of the feed wire.

The movable swivel joint of the balancer and the power cylinder provides the ability to accurately adjust the load on the wire and provides the same amount of pressure on the rollers.

The presence of stops regulates the individual stroke of each pinch roller and prevents crushing of cored wire in the event of voids in it.

The essence of the invention is illustrated by an example of its specific implementation with reference to the accompanying drawings, which show:

- figure 1 is a General view of the tribal apparatus,

- figure 2 - tribal apparatus with the upper arrangement of the pressure rollers,

- figure 3 - tribamer with a lower location of the pressure rollers,

- figure 4 - balancer clamp mechanism with a slot for moving and fixing the rod of the hydraulic cylinder,

- figure 5 is a height-adjustable emphasis,

- figure 6 is a vertical part of the guide, made in the form of a sliding bearing,

- Fig.7 the vertical part of the guide, made in the form of two bearings,

- Fig.8 is a General view of a device for feeding wire into a steel pouring ladle.

The tribamer 1 is a housing 2, in which a rotation mechanism 3, a clamp mechanism 4, a hydraulic actuator 5 and two electric motors 6 are mounted.

The rotation mechanism 3 is made of two-strand, with three drive rollers 7 for each stream 8, 9, which can operate independently from each other with different speeds and clamping forces of the wire. The drive of each stream is carried out from the electric motor through a chain gear 10. Three pressure rollers 11, 12, 13 of each stream are pressed to the wire using the clamp mechanism 4, made in the form of a beam 14, mounted for movement relative to the vertical guide 15 and connected by hinges 16, 17 with balancers 18, 19, as well as two hydraulic cylinders 20, 21 with rods 22, 23, connected by hinges 24, 25 with balancers 18, 19. The middle pressure roller 12 is installed in the lower part of the beam 14, extreme pressure roles ki 11, 13 - at the free ends of the balancers 18, 19.

The pinch rollers 11, 12, 13 with the clamping mechanism 4 can be located with respect to the direction of pulling the wire both from above (Fig. 2) and from below (Fig. 3).

The hinges 24, 25 can be made with the possibility of movement along the balancers 18, 19 through the slots 26 and fixation by means of adjusting screws 27 (figure 4).

The balancers 18, 19 and the crosshead 14 of each stream 8, 9 are equipped with height-adjustable stop screws 28. The stop screws in the extreme position interact with the stops 29, which are mounted on the housing 2 (figure 5).

The vertical part of the guide, along which the cylindrical part of the beam 14 of the guide 15 moves, can be made in the form of a linear plain bearing 30 (Fig.6), or two linear plain bearings 31 spaced from each other (Fig.7).

The rotation of the drive rollers 7 of each stream is carried out using a chain gear 10 and a gear transfer gear 32 located inside the gear stand 3.

The hydraulic drive has a wide range of control of the working pressure depending on the type and size of the wire 33.

The structure of the equipment for feeding wire to the steel pouring ladle, in addition to the tribamer 1, includes two rebel receivers 34 and a guide wiring 35 (Fig. 8).

A device for feeding wire works as follows. The riots of the wire 36 using a crane serves on the platform of the tribal apparatus 1 and are installed in the rioters 34, where they are released from packaging. The inner end of the riot wire is straightened and tucked through the guide basket into the tribamer 1.

The rebel receiver 34 is a metal structure on which the wire bundle 36 is mounted and fixed, and the wire is also unwound from the inside of the riot.

After starting the hydraulic actuator, the upper non-driven rollers using the clamp mechanism 4 press the wire 33 to the lower rollers. The electric drive is started, and the tribamer 1 through the guide wiring 35 gives out a predetermined amount of wire to the bucket with the required speed.

The guide wire 35, made in the form of a curved pipe, provides a vertical input of the wire 33 into the molten metal.

The difference in the magnitude of the forces created by the pressure rollers of the clamp mechanism of the tribamer is compensated by the connection of two balancers by means of a traverse, which helps to ensure the stability of the wire feed due to the constant and uniform pressing of all three pressure rollers to the wire, regardless of the quality, size and type of wire.

The design of the tribal apparatus provides the ability to fine-tune the mechanism of clamping rollers by adjusting the position of the hinges connecting the rods of the hydraulic cylinders with balancers.

Thus, the use of the proposed tribal apparatus helps to stabilize the technological process of metal processing with aluminum and cored wire, increase the reliability and durability of the tribal apparatus, increase maintainability and simplify its maintenance.

Claims (6)

1. A tribe-apparatus for introducing wire into molten metal, comprising a housing, three drive and three pressure rollers with rotation and pressure mechanisms, characterized in that the pressure mechanism is made in the form of two power cylinders and a beam, movable relative to the vertical guide and pivotally connected to two balancers, each power cylinder being pivotally connected to the body and to the balancer in the middle part, the middle pressure roller is mounted on the traverse, and the extreme pressure rollers are installed on the free ends of the balancers. 2. The tribamer according to claim 1, characterized in that the swivel connection of each power cylinder with the balancer is made with the possibility of adjusting the position relative to the balancer. 3. The tribamer according to claim 1, characterized in that the pinch rollers with the clamping mechanism are located below relative to the direction of wire feed. 4. The tribamer according to claim 1, characterized in that the balancers and the crosshead are equipped with height-adjustable stop screws that interact with the stops fixed to the housing. 5. The tribal apparatus according to claim 1, characterized in that the crosshead is provided with a cylindrical shank interacting with a vertical guide, which is made in the form of a linear plain bearing with an antifriction liner made of graphite. 6. The tribal apparatus according to claim 1, characterized in that the crosshead is equipped with a cylindrical shank interacting with a vertical guide made in the form of two spaced linear sliding bearings with antifriction liners made of graphite.

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