RU2243044C2 - Tube continuous rolling mill - Google Patents

Abstract

FIELD: mills for continuous rolling of tubes.

SUBSTANCE: mill includes stands mounted on pedestal and inclined by 45 degrees relative to horizon and by angle 90 degrees one to other; kinematically joined with said stands cylindrical reduction gears and motors mounted at inclination angle in frames secured to foundations. Said motors are mounted in frame with possibility of motion in plane normal relative to their axes. Reduction gears are joined with motors through clutches. Bases of pedestal for stands and frames carrying reduction gears and motors are arranged in the same level. Said pedestal and frames are rigidly joined one with others.

EFFECT: reduced size of rolling mill, simplified design of foundation, enhanced operational reliability and increased useful life period of mill.

3 dwg

Description

The invention relates to the field of pipe production, and more specifically to continuous mills for rolling pipes.

The modern continuous mill consists of seven to nine two-roll work stands with an individual drive for each stand. Increased durability have mills with an inclined arrangement of engines, which allows the use of more reliable and durable cylindrical gears.

A continuous tube rolling mill is known, comprising stands installed on a pedestal at an angle of 45 ° to the horizontal and at an angle of 90 ° relative to each other, kinematically connected to the stands, gearboxes and motors mounted obliquely on frames fixed to the foundation and placed for adjacent stands on different sides from rolling axis (see UK Pat. No. 2122932, B 21 B 35/12, decl. 06/23/83, publ. 01/25/84).

To improve maintenance of the gearbox, it is mounted on the frame with the possibility of rotation in a position in which the axes of its gears and other elements become horizontal. The foundation is made stepwise.

The disadvantage of this mill is that the dimensions of the mill are large in height, since the pedestal for the stand and the base of the frames for gearboxes and motors are located at different levels.

Of the known continuous tube rolling mills, the closest in technical essence is the mill containing stands mounted on a pedestal at an angle of 45 ° to the horizon and at an angle of 90 ° relative to each other, kinematic cylindrical gearboxes connected to the stands and motors mounted obliquely on frames fixed to the foundation and placed for neighboring stands on different sides from the axis of rolling (Machines and assemblies of metallurgical plants. In 3 volumes. T. 3. Machines and assemblies for the production and decoration of rolled products. Textbook for high school Call Tselikov A.I., Polukhin P.I. et al. 2nd ed. - Moscow: Metallurgy, 1988, p. 588-589, or auth. certificate of the USSR No. 255170, 21 V, decl. 04.24.1968, published on 10.28.1969).

To ensure accurate installation of the motor axes relative to the corresponding axis of the high-speed shaft of the gearbox, they are interconnected by means of couplings with an intermediate shaft, and with stands - elongated universal spindles.

A disadvantage of the known design of a continuous tube mill is that the elongation of the joints between the stands, gearboxes and motors complicates the foundation and installation of the entire mill, increases the height of the mill and the area occupied by the mill.

Another disadvantage is that the stands, gearboxes and motors are mounted on unconnected pedestals and frames and all efforts, including dynamic loads, are transferred to the foundation, and this leads to premature destruction of the foundation and, consequently, to a decrease in reliability and the durability of the mill itself due to the fact that the violation of the foundation will affect the change in the strength parameters of the equipment.

The objective of the present invention is to create a continuous tube mill having smaller dimensions in height, the foundation of a simplified design, higher reliability and durability.

This object is achieved by the fact that in a continuous tube mill containing stands installed on a pedestal at an angle of 45 ° to the horizontal and at an angle of 90 ° relative to each other, kinematically connected to the stands are cylindrical gears and motors mounted obliquely on frames fixed to the foundation, according to of the invention, the motors are mounted on the frame with the possibility of displacement in a plane perpendicular to its axis, and gearboxes with motors are connected by gear couplings, while the base of the pedestal for stands frames carrying reducers and motors installed on one level and the pedestal and frame are rigidly interconnected.

Such a constructive implementation of a continuous tube mill will reduce its height and simplify the construction of the foundation, since the pedestal bases for stands, frames for gearboxes and motors are installed at the same level due to the fact that the exact installation of the motor axes relative to the corresponding axis of the high speed gearbox shaft is provided by moving the motor in a plane perpendicular to the axis of the engine. This allows you to connect the gearbox to the engine with gear couplings without an intermediate shaft and reduce the length of the spindle connecting the cage with the gearbox.

At the same time, the reliability and durability of the mill will be increased, due to the fact that all efforts, including dynamic ones arising during the rolling process, will be perceived by a single chain of metal structures: engine frame, gear frame, pedestal, gear frame, engine frame rigidly connected between yourself, not the foundation.

To explain the invention, a specific embodiment of the invention is given below with reference to the accompanying drawings, in which

figure 1 shows a continuous pipe rolling mill, General view:

figure 2 shows the engine mounted on the frame;

figure 3 is a view of B in figure 2.

A continuous pipe rolling mill consists of stands 1 with work rolls 2 mounted on a pedestal 3 at an angle of 45 ° to the horizontal and at an angle of 90 ° relative to each other, cylindrical gears 4, connected to the work rolls 2 with a spindle connection 5, motors 6, connected with gears 4 toothed couplings 7.

Spur gears 4 are mounted in a prismatic groove on frames 8, also at an angle of 45 ° to the horizontal.

The motors 6 are obliquely mounted on the frame 9 with the possibility of displacement in a plane perpendicular to its axis, for example, they are mounted on a plate 10 mounted on the frame 9, interacting with its ends with screws 11 mounted on the frame 9 on both sides of the engine 6.

The base of pedestal 6, frame 8 and frame 9 are installed on the same level on a flat foundation 13. Pedestal 3 and frames 8 and 9 are rigidly connected to each other, for example by bolts.

After installing the stands 1 on pedestal 6 with the formation of an accurate gauge along the axis of rolling, displacement of the engine 6 perpendicular to its axis ensures the exact alignment of the engine, gear couplings 7 and the drive shaft of the gearbox 4 with the axis of the rolls.

The rolling process is carried out in a known manner.

The proposed continuous tube mill compared with the known ones allows to reduce the cost of manufacturing the foundation, has smaller dimensions in height, has higher reliability and durability.

Claims (1)

A continuous tube rolling mill containing stands mounted on a pedestal at an angle of 45 ° to the horizontal and at an angle of 90 ° relative to each other, kinematically connected to the stands, cylindrical gears and motors mounted obliquely on frames fixed to the foundation, characterized in that the motors are mounted on the frame with the possibility of displacement in a plane perpendicular to its axis, and gearboxes with motors are connected by gear couplings, while the base of the pedestal for stands and frames bearing gearboxes and motors, enes on the one level, and the pedestal and frame are rigidly interconnected.

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