RU2308336C1 - Load-lifting apparatus for transferring blanks - Google Patents

Abstract

FIELD: production of rolled tubes, namely systems for transferring blanks, mainly cylindrical ones to rolling mill.

SUBSTANCE: lifting apparatus for transferring blanks includes car provided with motion drive and carrying yoke having fixed and movable grips; drive unit for closing grips and drive unit for lifting yoke mounted on car. One pair of car wheels is driven from electric motor and other pair of car wheels is idle. П-shaped vertical frame is mounted on car in port at side of idle wheels of car and it rests upon car through two inclined beams. Yoke with grips is suspended on ends of said vertical frame with possibility of rocking. Fixed grip is secured to yoke itself and movable grip is jointly mounted on yoke. Each grip has upper and lower jaws being continuous along width of yoke and inclined by angle 25-35° relative to vertical plane. Lower jaws of fixed grip are normal relative to yoke rocking plane. Drive unit for closing grips is mounted on yoke and it is jointly secured to it. Drive unit for lifting yoke includes two drive sprockets and chains embracing them and jointly secured to yoke.

EFFECT: high-quality gripping and clamping of wide assortment of blanks with shifted gravity center from continuous roller table for transferring them to rolling mill in order to provide its non-stop operation.

5 dwg

Description

The invention relates to the field of pipe production, and more specifically to a lifting device for transferring hot billets of predominantly cylindrical shape to a rolling mill.

The workpiece must be taken from a continuous roller table (trough) with an opening angle of up to 140 °. One end of any workpiece has a reach of 1600 mm relative to the gripping axis, therefore, the workpiece with a shifted center of gravity must be clamped for transmission.

Known lifting device for transferring workpieces, see and.with. USSR No. 1184801, m.cl. B66C 17/04, claimed 06/01/83, publ. 10.15.85, containing a drive trolley carrying grippers with a drive information and located on the trolley drive lifting grippers.

The grips are made in the form of a system of levers driven by a drive by means of a slider.

A disadvantage of the known device is the inability to capture and force clamp the workpieces from a continuous roller table (trough), as well as the transfer of workpieces with a displaced center of gravity, since the grippers can only cover the workpieces with a gap and cannot clamp it.

Of the known lifting devices for transferring blanks, the closest in technical essence is the device described in A.S. USSR No. 595229, m.cl. B65G 47/34 claimed 03/06/72, publ. 02/28/78.

This device comprises a drive trolley carrying a trunk with grips, a drive for reducing the grips and a trunk lift drive located on the trolley. The grips are made in the form of two pairs of movable jaws, one of which has a common traction. The trunk is made in the form of double levers connected by traverses.

The drive of the gripper information is made in the form of a crankshaft with a drive of its rotation and a thrust connected by a hinge to the jaw thrust and equipped with a spring compensator, since the centers of swing of the trunk and thrust do not match.

A disadvantage of the known design of the lifting device is that it cannot provide a forceful grip of the workpieces from a continuous roller table (trough) with a displaced center of gravity, since its grips cannot clamp the workpiece, they only cover it.

In addition, due to the large console on which the workpiece is located, the trunk becomes unstable.

The objective of the present invention is to provide a lifting device for transferring workpieces, which allows for high-quality and reliable grip and power clamping of hot workpieces of a wide range both in length and in diameter, with a shifted center of gravity from a continuous roller table (trough) and transferring them to the rolling mill .

This object is achieved in that a lifting device for transferring workpieces, comprising a trolley with a displacement drive, carrying a trunk with grippers, one of which is movable with a drive of information, and a drive for raising the trunk located on the trolley, according to the invention is provided with a trolley mounted on the trolley and resting against it two inclined beams with a U-shaped vertical frame located along the width of the trolley opening, at the ends of which a trunk equipped with a fixed grip is suspended with a possibility of swinging, the fixed and fixed grippers have upper and lower jaws made continuous along the width of the trunk and with an angle of inclination of 25-35 ° to the vertical plane, while the lower jaws of the fixed gripper are perpendicular to the plane of swing of the trunk, in addition, the drive for reducing the movable gripper is located on the trunk and pivotally connected to it, and the trunk lift drive is made in the form of two drive sprockets and chains enveloping them pivotally connected to the trunk.

Such a constructive implementation of a lifting device for transferring billets will allow for high-quality and reliable grip and power clamping of hot billets of a wide range with a displaced center of gravity from a continuous roller table (trough) and transferring them to the rolling mill.

This is achieved due to the fact that the swing plane of the trunk is perpendicular to the plane of the lower jaw of a fixed grip located on the trunk itself, and also due to the fact that the jaw lips are made with an inclination of 25-35 ° to the vertical plane, which made it possible to wind up the stationary sponge workpieces and thereby ensure the smallest stroke of the movable jaw under load and high-quality grip and clamping of the workpiece on the roller table. When the angle of inclination of the lower jaws of the stationary grip to the vertical plane is less than 25 °, the conditions for gripping the workpiece deteriorate, and when the angle of inclination is more than 35 °, the dimensions of the device increase, which is undesirable. In addition, the execution of the jaws of the grips continuous along the width of the swinging trunk made it possible to clamp the workpieces with a shift of their center of gravity, and the chain fasteners on the width of the swinging frame ensure a stable horizontal position of the workpieces with a shifted center of gravity.

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

figure 1 shows a lifting device for transferring workpieces;

figure 2 is the same, a view along arrow A in figure 1;

figure 3 is the same, view along arrow B in figure 1;

figure 4 is the same, view BB in figure 1, the capture of blanks of various lengths from l _min to l _max ;

figure 5 - diagram of the capture and clamping of workpieces of various diameters.

The lifting device for transferring the workpieces comprises a drive carriage 1 mounted on a trestle, carrying a trunk 2 with grippers 3, 4, a gripping information drive and a trunk lifting drive located on the carriage 1. One pair of wheels 5 of the carriage 1 is driven by an electric motor 6, and the other pair 7 - single. On the trolley 1 in the opening from the side of the idle wheels 7, a U-shaped vertical frame 8 is fixed, abutting against it by means of two inclined beams 9. At the ends of the vertical frame 8, by means of two hinges 10, a trunk 2 with grippers 3, 4 is suspended, one of which 3 the fixed one is fixed on the trunk itself, and the other gripper 4 is movably pivotally connected to the trunk 2. Each of the grippers 3, 4 has upper 11 and lower 12 jaws made continuous along the width of the trunk and with an angle of inclination of 25-35 ° to the vertical plane.

The lower jaws 12 of the fixed gripper 3 are perpendicular to the plane OO of the swing of the trunk 2. The drive information of the capture 4 is located on the trunk 2 and is made in the form of an electric motor 13, a gearbox 14, a combined crankshaft 15, a spring rod 16 and a lever 17. The trunk lifting drive is made in the form located on the trolley 1 of two sprockets 18 driven by an electric motor 19 and gearbox 20 and the chains 21 enveloping them, pivotally connected to the trunk 2 at a distance of its width.

For the reception of blanks is a roller table 22 with an emphasis 23.

The device operates as follows.

In the initial position, trunk 2 is in the upper fixed position with open grippers 3, 4. Billets 24 ⌀ 360-450 mm, length 1400-4500 mm, weighing 4500 kg at a temperature of 1250 ° C are fed along the continuous roller table 22 to the stop 23. One end blanks l _max can have a reach of 1600 mm relative to the axis of capture.

With the lifting drive, the trunk 2 is lowered to the roller table 22, on which the workpiece lies. The lower jaw 12 of the fixed grip 3 starts under the workpiece. Through the lever 17, the spring-loaded rod 16, the crankshaft 15 with the gearbox 14 and the drive 13, the movable gripper 4 captures and clamps the workpiece with the shifted center of gravity from the continuous roller table (trough) 22 with its jaws.

After the workpiece is gripped, the trunk 2 by means of chains 21 rises to the upper position, while thanks to the articulated fastening of the chains across the width of the trunk, a stable horizontal position of the workpieces with a shifted center of gravity is ensured, and the spring-loaded rod reliably holds the workpiece due to the spring force.

Using trolley 1, the workpiece is transported to the rolling mill, where after a fixed stop of the trolley, the trunk 2 lowers through the drive, and the movable gripper 4 through the lever, traction, crankshaft, gearbox, electric motor releases the workpiece. Then trunk 2 with grips rises. Next, the cycle repeats.

The proposed lifting device for transferring billets in comparison with the known ones will ensure high-quality gripping and clamping of a wide range of billets with a shifted center of gravity from a continuous roller table (trough) and transferring them to the rolling mill to ensure its smooth operation.

Claims (1)

A lifting device for transferring workpieces, comprising a trolley with a displacement drive, carrying a trunk with grips, one of which is movable with an information drive, and a trunk lifting drive located on the trolley, characterized in that it is provided with a trolley mounted on the trolley and resting against it by two inclined beams A U-shaped vertical frame located across the width of the trolley opening, at the ends of which a trunk equipped with a fixed grip is suspended with a possibility of swinging, the movable and fixed grips having a top and lower jaws made continuous along the width of the trunk and with an angle of inclination of 25-35 ° to the vertical plane, while the lower jaws of the fixed grip are perpendicular to the plane of swing of the trunk, in addition, the drive information of the moving grip is located on the trunk and pivotally connected to it, and the trunk lift drive is made in the form of two drive sprockets and chains enveloping them pivotally connected to the trunk.

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