DE19758385A1 - Sidebars of an adjustable plate mold - Google Patents

Abstract

The side strips (21, 22) consist of change and holding elements (23, 27). Each change element (23) consists of copper and has a U-shaped configuration, with its parts (24) facing away from the mold cavity (13). The holding element extends into the interior of the change element, and is releasably connect to its parts (24). Also claimed is a method for changing the side strips. After clamping of the side strips is released, the change elements are extracted from the mold in a direction substantially parallel to the slab extraction motion, while the coolant supply and removal connections are left together with the holding elements in the mold. Next a new change element is introduced and clamped in place.

Description

The invention relates to side strips of an adjustable plate mold for continuous casting of slabs, especially for steel, between the broad sides of the mold clampable and arranged with a side facing away from the mold cavity Adjustment device are connected.

An adjustable plate mold for continuous casting is known from DE-OS 23 10 615 with a support frame and supported therein, provided with cooling devices, the Longitudinal and transverse walls delimiting the mold cavity with an adjusting device, associated with a clutch to interrupt the positive connection and the coupling is a movement of the clamped during the casting operation Cross wall opposite the stop surfaces towards the cavity and back allowed. Between the support plates and the molds firmly connected to it walls - both the narrow sides and the broad sides of those known from this document Chill mold - a cooling device is provided.

From DE-OS 24 15 224 is a method for controlling the cooling capacity of Narrow side walls in plate molds in continuous casting are known, the Narrow side walls are clamped between broad side walls, and in front The mold cavity begins to pour between the narrow side walls with an in Strand direction converging and the steel quality and strand width adapted casting cone is provided, which can be specified during the casting operation is adjustable.

Here, a narrow side wall consists of a mold cavity facing Copper plate that is firmly connected to a support plate.

Furthermore, a mold wall is known from EP 0 086 405, which consists of a copper plate and a flexible composite plate provided with cooling channels.  

With this flexible mold wall, too, the copper one is used for Form cavity indicating plate intimately connected to a support wall.

When changing the format of the above-mentioned plate molds are the to change complete sidebars.

Knowing the above disadvantages, the invention has set itself the goal of creating a device and specifying a corresponding method in which a quick and safe change of the slab format of a slab produced in a plate mold can be carried out with respect to its thickness with simple constructional means. The invention achieves this aim by the characterizing features of the device claim 1 and the method claim 11 .

According to the side strips are made of an interchangeable part and a holding part built up. The interchangeable part consists of copper and has a U-shaped Shape, with the two legs on the side facing away from the mold cavity are arranged.

A holding part protrudes into the free space of the U-shaped interchangeable part Press elements are releasably connectable to the legs of the interchangeable part.

For the non-positive connection, membranes or also come as pressing elements Springs are used, the latter by hydraulic elements when changing of the interchangeable parts are compressed and during operation on the Support the inside of the thighs.

In an advantageous embodiment, the legs are provided with cams, so that they have an L shape. In this embodiment, the pressing elements are supported on the side facing the mold cavity and press the End face of the holding part against the inside of the copper Exchange part.

The contacting surfaces of the holding part and the interchangeable part are cooling channels designed. Without reducing the cooling capacity, an area, preferably that of the holding part, be flat.  

The sealing between the channels is sufficient by the intermediate webs viewed, since small leakages cooling the copper Do not reduce replacement parts.

The legs of the U-shaped interchangeable parts are shaped so that they are exactly the Adjust the inside surface of the broad sides of the mold. With the same internal structure of the Holding part these can be securely connected to the interchangeable part without one Change of shape of the holding parts is to be carried out.

The exchange of the replacement parts after wear or when changing the format is carried out as follows:

• - The clamping of the side rails by the broad sides is released,
• - The pressing of the pressing elements between the holding part and the interchangeable part is relaxed,
• - In the case of U-shaped interchangeable parts with an L-shaped leg, the copper-shaped profiles up or down from the mold pulled out and reinserted for replacement,
• - In the case of U-shaped interchangeable parts with smooth legs, the U-shaped ones could Copper profiles can be moved to the mold interior quickly and then to be pulled freely from the mold. The installation takes place in reverse order.

The U-shaped interchangeable parts with smooth legs can also be in one Be changed that the clamping between the broad sides of the The mold remains, so first the frictional connection between the Holding part and the interchangeable part is relaxed and the holding part over the Adjustment device is pulled out of the interchangeable part. Subsequently After relaxation through the broad sides, the interchangeable part can be removed from the mold be taken out.

When reassembling, the interchangeable part can be inserted first and from the broad sides are clamped and the holding part on the adjustment device led into the free space of the U-shaped interchangeable part and there non-positively be clamped.

An example is set out in the accompanying drawing, which is a top view of a Slab mold shows.

Fig. 1 shows a mold cavity 13 which is of the wide sides 11 and 12 and the side bars 21 and 22 are formed.

The broad side 11 is flat and can be moved via broad side adjustments 51 and 52 . The broad side 12 shows a cambered mold, the mold wall being flat in the left part and curved in the right part. The broadside 12 can be moved via broadside adjustments 53 and 54 .

The side strips 21 and 22 can be clamped between the broad sides 11 and 12 .

In the left part of the sketch, the side bar 21 is made up of the interchangeable part 23 , which is U-shaped and has straight-sided legs, and the holding part 27 . Channels 41 are incorporated on the end face of the holding part 27 , which have half bores 42 in the interchangeable part 23 and corresponding half bores 43 in the holding part 27 . One of the channels 41 is connected to a coolant supply 44 and another channel is connected to a coolant discharge 45 .

Pressing elements 31 are provided between the inside 25 of the legs 24 and the holding part 27 . In the upper part of the picture, the pressing element 31 is constructed as a unit from a spring 33 and a piston-cylinder unit 34 . The piston-cylinder unit 34 is actuated only for the time in which the spring 33 is relaxed and the interchangeable part 23 is detached from the holding part 27 or plugged on again.

In the right part of the sketch, the channels 41 are introduced exclusively in the U-shaped, interchangeable part 23 made of copper.

Another difference between the side bar 22 shown here and the opposite side bar 21 is that the legs of the U-shaped interchangeable part have cams 26 which give the legs an L-shaped shape, the cams pointing away from the broad sides.

On the side of the cams 26 inclined towards the mold cavity 13 , diaphragms 32 are provided as pressing elements 31 . In the upper part of the picture, a positive connection between the interchangeable part 23 and the holding part 27 is established by means of wedges 35 .

The channels 41 are in turn connected to a coolant device (not shown) via a coolant supply 44 and a coolant discharge 45 .

The side bar 21 is connected to a narrow side adjustment 61 and the side bar 22 is connected to a side bar adjustment 62 .

Reference list

11

first broadside (straight)

12th

second broadside (domed)

13

Mold cavity

21

first sidebar

22

second sidebar

23

Exchange part

24th

leg

25th

inside

26

cam

27

Holding part

31

Pressing elements

32

membrane

33

feather

34

Piston-cylinder unit

35

wedge

41

channel

42

Half bore (

23

)

43

Half bore (

27

)

44

Coolant supply

45

Coolant discharge

51

to

54

first to fourth broadside adjustment

61

,

62

first and second sidebar adjustment

Claims (11)

1. Sidebars of an adjustable plate mold for the continuous casting of slabs, in particular for steel, which can be clamped between the broad sides of the mold and connected to an adjusting device arranged away from the mold space and which are connected to a coolant supply and removal.
characterized by
that the side strips ( 21 , 22 ) consist of an interchangeable part ( 23 ) and a holding part ( 27 ),
that each interchangeable part ( 23 ) is constructed from copper and has a U-shaped shape, the legs ( 24 ) of which point away from the mold cavity 13 , and
that the holding part ( 27 ) projects into the free space of the U-shaped interchangeable part ( 23 ) and is releasably connectable to the legs ( 24 ). 2. Sidebars according to claim 1, characterized in that the legs ( 24 ) have an L-shaped shape with foot-end, facing cams ( 26 ). 3. Sidebars according to claims 1 or 2; characterized in that between the interchangeable part ( 23 ) and the holding part ( 27 ) press elements ( 31 ) are provided, by means of which these can be non-positively connected to one another. 4. Sidebars according to claim 3, characterized in that pressurizable membrane ( 32 ) are provided, the one end of the holding part ( 27 ) and the other end against the inside ( 25 ) or the cams ( 26 ) of the legs ( 24 ) of the U -shaped interchangeable part ( 23 ) can be pressed. 5. Sidebars according to claim 3, characterized in that springs ( 33 ) are provided which are compressible by piston-cylinder units ( 34 ) and in the depressurized state of the piston-cylinder unit ( 34 ) the holding part ( 27 ) with the interchangeable part ( 23 ) connect non-positively. 6. Sidebars according to claim 2, characterized in that wedges ( 35 ) are provided which can be introduced between the mold cavity ( 13 ) inclined surface of the cams ( 26 ) and the corresponding surface of the holding part ( 27 ). 7. Sidebars according to one of the above claims, characterized in that between the mold cavity ( 13 ) facing away from the U-shaped interchangeable part ( 23 ) and the corresponding outer surface of the holding part ( 27 ) channels ( 41 ) are provided through which a coolant is conductive. 8. Sidebars according to claim 7, characterized in that the channels ( 41 ) are bores, the respective half-bore ( 42 or 43 ) in the interchangeable ( 23 ) and / or in the holding part ( 27 ) are introduced. 9. Sidebars according to claim 8, characterized in that a plurality of channels ( 41 ) are provided which are guided in a meandering manner and of which at least one half-bore ( 42 ) to the coolant supply ( 44 ) and another half-bore ( 43 ) to the coolant discharge ( 45 ) connected. 10. Sidebars according to one of the above claims, characterized in that the legs ( 24 ) of the U-shaped interchangeable part ( 23 ) converge on the side facing away from the cavity ( 13 ) and with respect to the surface shape with the inner wall of the broad sides ( 11 or 12 ) correspond in the adjustment range of the side strips ( 21 , 22 ). 11. Procedure for changing narrow sides in adjustable plate molds for Continuous casting of slabs, especially for steel, between the Broad sides of the mold can be clamped in and with a mold cavity opposite side arranged adjustment device and connected the part of the copper side bar facing the mold cavity is below Use a mold with side strips according to at least one of the above mentioned claims, characterized, that after relaxing the pinching of the side rails by the Broad sides leaving the connections for the coolant inlets and outlets and the connection of the adjusting device with the holding parts made of copper assembled change part of the sidebar substantially parallel to Pulled out the pulling direction and then a new interchangeable part is returned and pinched.