RU42639U1 - DEVICE FOR TRANSPORTATION OF PREPARATIONS IN PASS HEATING FURNACE - Google Patents

Abstract

The utility model relates to means for heating metal billets before plastic deformation, in particular, to heating furnaces with a movable hearth in the form of bogies, for heating metal billets before hot rolling. The objective of the invention is the efficient use of the hearth of the furnace with different widths of the workpieces and, as a result, increase the productivity of the furnace. A device containing supply and discharge roller tables, workpiece loading and unloading manipulators, transporting trolleys with support elements on the hearth part, shutters with actuators on the furnace loading and unloading ends and a truck return line from the workpiece unloading zone to the loading zone. The difference of the proposed device lies in the fact that the transporting carts with supporting elements form a continuous movable under the furnace. The workpiece loading and unloading manipulators are equipped with fork-type grippers installed with the possibility of their vertical and horizontal movement along the transporting trolleys in the spaces between the supporting elements and the rollers of the inlet and outlet roller tables. The device is equipped with a control system for transporting workpieces, including sensors for registering horizontal movements of the grippers installed in the loading and unloading zones and a device for measuring the width of the workpieces installed in the loading zone, connected through the block generating control signals to the drives of horizontal and vertical movements of the grippers of the manipulators, and also with damper actuators. The control system for transporting workpieces provides the movement of the grippers of the manipulators, depending on the width of the workpieces, the distance between them on the hearth and the length of the carts in accordance with the algorithms for loading and unloading. 2 s.p. f-ly, 5 ill.

Description

The utility model relates to means for heating metal billets before plastic deformation, in particular, to continuous heating hearth furnaces for heating metal billets before hot rolling.

A device for transporting workpieces in a heating furnace, containing the input and output roller tables, manipulators loading and unloading workpieces, movable under the furnace with support elements on the hearth and lifting support beams on the sides [1].

The movement of the workpieces is carried out due to the reciprocating movement of the support beams. The magnitude of the displacements is the same for all types of heated billets, alternately located during transportation on the supporting beams or on the supporting elements of the hearth.

A disadvantage of the known device is that when moving workpieces as they move towards the discharge side, it is possible that they shift relative to the initial position along the axis of the furnace. Workpiece deformation is also possible.

The known device is designed to transport blanks of approximately the same length.

The design of the moving hearth and the support lifting beams are in the atmosphere of the furnace, and cooling of the structures is required, which, in turn, leads to a complication of the design of the furnace as a whole. A significant part of the lower surface of the heated workpieces is blocked from thermal effects, while the heating efficiency is reduced.

Known closest to the claimed device for transporting billets of a heating furnace, containing inlet and outlet roller tables, manipulators loading and unloading billets, movable under the furnace in the form of bogies with support elements on the hearth and a line for returning bogies from the zone of unloading the billets into the loading zone. [2]

The known device does not require additional cooling of the structures of the hearth and the efficiency of the furnace is very high.

The loading and unloading of billets from trolleys of the known device takes place outside the furnace with an open hearth in the loading and unloading zones individually on each trolley.

A disadvantage of the known device is that a whole number of workpieces (one or more) is loaded onto each trolley, which is determined by the width of the workpieces and the necessary distance between them and the distance to the edge of the trolley. When heating billets with different widths, the furnace surface at the joints of the bogies is not effectively used, which reduces the productivity of the furnace.

The objective of the proposed utility model is the efficient use of the hearth of the furnace with different widths of the workpieces and, as a result, increase the productivity of the furnace.

The problem is solved in that in a device for transporting workpieces in a continuous heating furnace containing a supply and discharge roller table, workpiece loading and unloading manipulators, transporting trolleys with supporting elements on the hearth part, shutters with actuators on the loading and unloading ends of the furnace, and a return line for trolleys from the unloading zone of the workpieces to the loading zone, the transporting trolleys with supporting elements form a continuous movable under the furnace, loading and unloading manipulators wives with fork clamps installed with the possibility of their vertical and horizontal movement along the transporting trolleys in the intervals between the supporting elements and the rollers of the feed and discharge roller tables, while the device is equipped with a workpiece transportation control system including sensors for recording horizontal movements of the grippers installed in the loading and unloading zones , and a device for measuring the width of the workpieces installed in the loading zone, connected through the control unit signals with drives of horizontal and vertical movements of the grippers of the manipulators, as well as with the drives of the shutters of the heating furnace in the areas of loading and unloading the workpieces, providing movement of the grippers of the manipulators in accordance with the algorithms:

for loading - Lz _i -Lz _i-1 = nLt-0.5 (Bz _i + Vz _i-1 ) -Δz _{i-1, i}

where: L3 _ii - the horizontal movement of the manipulator for the "i-1" -th workpiece in the loading zone,

Lз _i - the horizontal movement of the manipulator for the "i" -th workpiece in the loading zone,

Lt - length of the trolley

n is the number (1, 2, 3 ...) equal to the number of trolleys additionally added to the hearth of the furnace when loading the "i" -th workpiece,

Vz _i - the width of the "i" th workpiece,

Vz _i-1 - the width of the "i-1" -th workpiece,

Δз _{i-1, i} is the distance between the "i-1" and "i" -th blanks on the hearth of the furnace

for unloading

Lv _{k + 1} -Lv _k = mLt-0.5 (Bz _{k + 1} + Vz _k ) -Δv _{k, k + 1}

where Lв _{k + 1} - the horizontal movement of the manipulator for the "k + 1" th workpiece in the unloading zone,

Lв _k - the horizontal movement of the manipulator for the "k" -th workpiece in the unloading zone,

Lt is the length of the trolley,

m is the number (1, 2, 3 ...) equal to the number of bogies pushed out of the furnace after unloading the “k” th workpiece,

Bz _k is the width of the "k" th workpiece,

Vz _{i + 1} - the width of the "k + 1" -th workpiece,

ΔB _{k, k + 1} is the distance between the "k" and "k + 1" th blanks on the hearth of the furnace in the discharge zone.

When implementing the inventive device, the entire surface of the furnace hearth is effectively used to accommodate heated preforms, including the place where the carts join together.

The inventive utility model is illustrated by drawings where:

figure 1 shows a General view of the device,

figure 2 - section aa in figure 1,

figure 3 - section bb in figure 1,

figure 4 - section CC in figure 1,

figure 5 - section D-D in figure 1.

A device for transporting billets of a heating furnace comprises a supply 1 and a leading 2 live rolls, manipulators 3, 4 of loading and unloading the billets 5, movable continuously under 6 of the heating furnace 7 in the form of bogies 8 with supporting elements 9 on the hearth and a return line 10 of bogies 8 from the zone unloading 11 into the loading zone 12. The manipulators 3, 4 of loading and unloading the workpieces 5 are equipped with fork grippers 13, 14 with the possibility of their placement in the spaces between the supporting elements 9 on the hearth of the carts 8 and the rollers 15, 16 of the supply 1 and o leading

2 live rolls with the provision of ranges 17, 18 of the movement of the grippers 13, 14 along one or more carts 8 composed in continuous under 6.

In the loading zones 12 and unloading 11 of the workpieces 5, sensors 19, 20 for registering horizontal movements of the grippers 13, 14 are installed, and in the loading zone 12, a device 21 is installed for measuring the width of the workpieces 5. The sensors 19, 20 and the device 21 are connected through a control signal generation unit 22 s drives of horizontal 23, 24 and vertical 25, 26 movements of grippers 13, 14 of manipulators 3, 4, and also, with drives 27, 28 of shutters 29, 30 of the heating furnace 7 in zones 12, 11 of loading and unloading workpieces 5.

The device operates as follows.

The blanks 5 measure the width B using the device 21. Information about the measurements received in the block generating control signals 22. Next, the blank 5 is centered on the axis O ₁ -O ₁ , the feed roller 1, through which, is fed into the loading zone 12. Then using the grippers 13 of the manipulator 3 by means of a vertical displacement drive 25 is removed from the rollers of the roller table 1 and transmitted by a horizontal displacement drive 23 from the loading zone 12 to the interior of the heating furnace 7 with the shutter 29 open in the loading zone 12 and blanks. The signal to open the shutter 29 is supplied to the actuator 27 from the control signal generation unit 22 after processing the signal about the beginning of the movement of the grippers 13 of the manipulator 3 received from the horizontal displacement sensor 19. The control signal to stop the drive 23 horizontal movement when loading the first workpiece 5 is received taking into account the measured width B of the workpiece and the required distance Δz from the edge of the workpiece 5 to the edge of the truck 8. After stopping the grippers 13 of the manipulator 3 in the required position, a signal is sent to the drive 25 of vertical movements to lower the grippers 13 of the manipulator 3 until the workpiece 5 contacts the supporting elements 9 on the bottom of the bogies 8, after which the grippers 13 are removed from the workpiece 5 to the initial position by means of the drive 23 about the axis O ₁ -O ₁ metering roller conveyor 1. When this flap 29 is closed. Download each subsequent workpiece produced in accordance with the algorithm.

L3 _i -Lz _i-1 = nL _t -0.5 (Vz _i + Vz _i-1 ) -Δz _{i-1, i}

where L3 _i-1 is the horizontal displacement of the manipulator for the "i-1" th workpiece in the loading zone,

Lз _i - the horizontal movement of the manipulator for the "i" -th workpiece in the loading zone,

L _t - the length of the trolley,

n is the number (1, 2, 3 _... ) equal to the number of trolleys additionally added to the hearth of the furnace when loading the "i" -th workpiece,

Vz _i - the width of the "i" th workpiece,

Vz _i-1 - the width of the "i-1" -th workpiece,

Δз _{i-1, i} is the distance between the "i-1" and "i" -th blanks on the hearth of the furnace

So, for example, when

L _t = 1650 mm

n = 2

Bz _i = Bz _i-1 = 2700 mm,

Δз _{i-1, i} = 400 mm

Lz _i -Lz _i-1 = 21650-0.5 (2700 + 2700) -400 = 0 mm,

that is, all the blanks are loaded with the same horizontal movement of the manipulator.

When Vz _i-1 = 2700 mm,

Bz _i = 2400 mm,

Δз _{i-1, i} = 400 mm

L3 _i -L3 _i-1 = 21650-0.5 (2700 + 2400) -400 = 150 mm, the horizontal stroke of the manipulator on the “i” workpiece increases by 150 mm compared to the prototype.

After loading the workpiece 5 and returning the manipulator 3 to the initial position, the shutters 29, 30 in the zones 12, 11 of loading and unloading the workpieces 5 are raised by the amount required to push the carts 8 by an amount equal to the length of the cart L _t through the inner space of the heating furnace 7 together with an additional trolley 8, received from the return line 10. In this case, one of the trolleys 8 is pushed out of the inner space of the heating furnace 7 from the opposite side of the discharge zone 11.

If necessary, to place another billet 5 to the movable hearth 6 of the heating furnace 7 in the loading zone 12 add an additional cart 8 from the return line 10.

The unloading of the blanks 5 from the heating furnace 7 is as follows.

Grips 14 of the manipulator 4 from the starting position along the O ₂ -O ₂ axis of the take-up roller 2 are moved into the inner space of the heating furnace 7 by an amount corresponding to the position “k” of the workpiece 5 relative to the edge of the trolley necessary to push the trolley - Δzt _{k in the} 12- _zone .

The position of the "k" -th workpiece 5 relative to the edge of the truck 8 from the side of the discharge zone will be:

Δbt _k = mLt-B _k -Δzt _k

Where:

L _t - trolley length

m is the number (1, 2, 3 ...) corresponding to the number of bogies 8 in the unloading zone 11, on which the workpiece 5 lies,

B _k - the width of the "k" -th workpiece, Δzt _k - the position of the "k" -th workpiece relative to the edge of the truck in the loading area,

ΔWt _k - the position of the "k" -th workpiece relative to the edge of the cart in the discharge area.

After receiving a signal from the control signal generating unit 22, the drive 24 for horizontal movement of the grippers 14 of the manipulator 4 is stopped, after which the grippers 14 are lifted by the drive 26 for vertical movements and the workpiece 5 is removed from the supporting elements 9 of the hearth 6 and the workpiece 5 is removed from the inner space of the heating furnace 7 and transferred to the discharge roller 2 for subsequent hot rolling.

Unloading of all subsequent workpieces 5 from the hearth 6 is carried out in accordance with the algorithm:

LB _k - the horizontal movement of the manipulator for the "k" -th workpiece in the unloading zone,

L _t - the length of the trolley,

m is the number (1, 2, 3 ...) equal to the number of bogies pushed out of the furnace after unloading the “k” th workpiece,

Bz _k is the width of the "k" th workpiece,

Bz _{i + 1} - the width of the "k + 1" -th workpiece,

Δв _{k, k + 1 is the} distance between the "k" th and "k + 1" th blanks

The inventive device allows you to effectively use the entire surface of the hearth of the furnace to accommodate heated blanks. In this case, on the same furnace hearth compared to the known method, a larger number of workpieces is placed and greater furnace productivity is achieved.

The implementation of the proposed utility model will increase the utilization rate of the furnace hearth when heating workpieces of different widths and, thereby, increase the productivity of the furnace for the plate mill "5000" by about 18 ... 20%.

Claims (1)

A device for transporting workpieces in a continuous heating furnace, comprising a supply and discharge roller table, workpiece loading and unloading manipulators, transporting carts with support elements on the hearth part, shutters with actuators on the furnace loading and unloading ends, and a cart return line from the workpiece unloading zone to the loading zone characterized in that the transporting trolleys with supporting elements form a continuous movable under the furnace, the loading and unloading manipulators are equipped with grippers full-time type, installed with the possibility of vertical and horizontal movement along the transporting trolleys in the intervals between the supporting elements and the rollers of the inlet and outlet roller tables, the device is equipped with a workpiece loading and unloading control system, including sensors for registering horizontal movements of the jaws installed in the loading and unloading zones , and a device for measuring the width of the workpieces installed in the loading area, connected through the block generating control signals with s horizontal and vertical movements of the grippers manipulators and actuators with heating furnace valves in zones loading and unloading workpieces providing displacement gripper in accordance with the algorithms: For loading: L3 _i -Lz _i-1 = nLt-0.5 (Bz _i + Vz _i-1 ) -Δz _{i-1, i} , where L3 _i-1 is the horizontal displacement of the manipulator for the “i-1” th workpiece in the loading zone, Lз _i - the horizontal movement of the manipulator for the “i” -th workpiece in the loading zone, Lt is the length of the trolley, n is the number (1, 2, 3 ...) equal to the number of trolleys additionally added to the hearth of the furnace when loading the “i” -th workpiece, Vz _i - the width of the “i” th workpiece, Vz _i-1 - the width of the “i-1” th workpiece, Δз _{i-1, i} is the distance between the “i-1” and “i” -th blanks on the hearth of the furnace, for unloading: L in _{k + 1} -L in _k = mLt-0.5 (Bz _{k + 1} + Vz _k ) -Δv _{k, k + 1} , where Lв _{k + 1} is the horizontal displacement of the manipulator for the “k + 1” th workpiece in the discharge zone, Lв _k - the horizontal movement of the manipulator for the “k” th workpiece in the unloading zone, Lt is the length of the trolley, m is the number (1, 2, 3 ...) equal to the number of bogies pushed out of the furnace after unloading the “k” th workpiece, Bz _k - the width of the “k” th workpiece, Vz _{k + 1} - the width of the “k + 1” th workpiece, Δв _{k, k + 1} is the distance between the “k” and “k + 1” th blanks on the hearth of the furnace in the discharge zone.