DE1758536C - Method and mold for casting billets of rolls - Google Patents

Description

When power is supplied, the mixture 6 ignites and creates a small portion. Slag when Passing the consumable electrode 5 through to the journal insert 3 (the circuit is in the drawings not shown) the stream gradually liquefies all of the aggregate 7 and melts the end of the Trunnion insert 3 and the lower end of the consumable electrode 5.

The melting process can also be started by increasing the pouring of the premelted aggregate in initiate the mold 2.

After the slag bath 8 and the metal bath 9 has formed, the solidified part 10 is with the Trunnion insert 3 welded.

Then the Elektroschl'adre welding takes place of the body of the future roller.

After the roller body has been welded on at the required height, the melting process is stopped and the remainder of the consumable electrode 5 is immersed in the metal bath 9, which is the second trunnion forms.

The length of the consumable electrode 5 is chosen so that after the roller body has melted one end is left, the length of which is sufficient to produce the second trunnion.

According to this process, a roller body is made from electroslag cast with two journals conventionally produced metal that only requires machining. Here you can the journals, depending on the type of consumable electrode and the journal insert, made of rolled, forged or cast metal.

The advantage of the present method of manufacturing rolls is that it is considerably longer the life of the rolls with more profitable production.

This process can be used not only for steel but also for steel also manufacture cast iron rollers.

1 sheet of drawings

Claims (3)

K \ .1. . ■ 2 f .; The object of the present invention is to create a method and a device which make it possible to guarantee a more profitable manufacture of rolls. 1. A method for casting billets 5 This object is achieved in that for by electroslag remelting in a casting of roll blocks, the electroslag mold with a diameter that corresponds to that of the remelting process in a water-cooled roller body, thereby marked mold, the diameter of which is that of the roller body shows that in the mold on the clamping side a corresponds is used. According to the invention Insert is accommodated, which the running pin io in the mold on the clamping side einein an insert Corresponds to the shape and dimension, and that the one who removes the which speaks the second barrel, and the remainder of the consumable electrode, which forms the pin, forms after remelting in the second barrel pin, after remelting Rolling body is melted down. melted into the roll body. 2. Mold for carrying out the method 15 The invention can be neglected with the aid of a mold Claim 1, characterized in that it becomes real, in which the team according to the invention The team (1) has an opening, the corresponding one of which has an opening. whose diameter is the The diameter of the insert (3), which corresponds to that of the insert that forms the journal. Forms trunnions, corresponds. It is useful to split the team vertically in two 3. Mold according to claim 2, characterized by executing ao separable parts, under which electricity, draws that the team (1) are arranged from two parts feed prisms. consists, which are vertically separable and under In this way roller bodies can be made from where the power supply prisms (4) are arranged- electroslag cast and the trunnions are made of hernet are. conventionally made metal on a conventional one he electroslag plant through electroslag remelting can be produced without a special welding equipment is required. The invention is explained in more detail by means of an exemplary embodiment with reference to the drawings. It shows 3u F i g. 1 the mold combination in longitudinal section, The present invention relates to a method F i g. 2 the sealing of the separation point of the and a permanent mold for casting billets. spunk, Improving and increasing the service life F i g. 3 Arrangement of the electrode and the barrel of rolling, especially cold rolling, it is important to use the spigot before the electro-slag conversion the downtimes of the rolling mills during the meltdown, change unusable rollers to F i g. 4 the same during the electroslag wrestle. Remelting, The rolls generally fail because on Fig. 5 the same after the electroslag- the roll shell in places where non-metallic remelting occurs. see inclusions accumulate, a faulty upper 40 The combination 1 (Fig. 1) of the mold 2 is made up of two surface arises. vertically separable halves made of metal An increase in the quality of the rolled metal and and has an opening for the passage of the barrel with it the service life of the rollers can be increased by the pin insert 3. For tightening the barrel electroslag remelting process respectively. There are tenon insert 3 and for a reliable stream are several possibilities for roll manufacture 45 each half of the combination 1 has a supply after the electroslag remelting process, power supply prism 4. The direction of water flow in the knows. Team is shown by arrows. To get a slag One possibility is to avoid the forging of throughflow at the point of separation, using electroslag blocks and the manufacture of the harness construction using a labyrinth-like, fully forged roll. 50 formation A of the partition wall or such as The second possibility is the production of inclined section B. Rollers, whose bodies are made of electroslag cast The roller bodies are manufactured as follows, in which only the journals are forged: As a consumable electrode 5, which after the will. Electro-slag processes are remelted The service life of both rollers is the same. Host-55 must, a stick of conventionally manufactured The rollers of the second type are scientifically advantageous - metal with the required chemical cohesion, because their manufacture uses less forging setting, the diameter of which is the rough working through connected is. knife of the journal to be produced is the same. The manufacture of rollers, the body of which is made from As insert 3, a rod (also made from conventional electro-slag cast and both trunnions (because they are related to 60 lichem metal), the strength of which is that of the usually limit the service life of the roller) from the second running pin. The trunnion conventional made of metal, insert 3 is placed in the central hole of the wassergewärc most beneficial. cooled team I of the mold 2 vertically enclosed Hs isl a process for the manufacture of rollers Spanni. Known with niektroschlacke body and welded 6 ₅ between the end faces of the melting I. Aufzapfen. The production of this roller electrode 5 and the trunnion insert 3 is generally not profitable, since a special welding exothermic mixture 6 is used for this and equipment is required in the mold 2. the granulated aggregate 7 poured.