RU2224606C2 - Casting - rolling aggregate - Google Patents

Abstract

FIELD: plastic metal working, namely equipment for combined process of casting and rolling for making merchant rolled bars. SUBSTANCE: aggregate includes machine for continuous casting of billets, outlet roller table and apparatus for separating dummy bar, both mounted at outlet of machine; rolling mill mounted in parallel relative to machine for continuous casting of billets. Vertical guiding rollers are mounted behind apparatus for separating dummy bar along motion direction of billet. In front of rolling mill there are also mounted vertical guiding rollers opposite relative to above mentioned guiding rollers. Between said rollers lever with tong type clamp is mounted with possibility of rotation in horizontal plane. Invention provides possibility for dismatching speed values of casting and rolling processes that allows to use step rolling stands in combined aggregates. EFFECT: enlarged assortment of products. 1 dwg

Description

 The invention relates to the field of metal forming, and more particularly to equipment for a combined cast-rolling process, and is intended to produce high-quality workpieces.

 Known foundry-rolling unit [1] manufacturing a round profile containing sequentially installed single-strand continuous casting machine and a Kosovalkovy planetary mill, the rolls of which rotate in the rotor. The planetary mill provides intensive deformation of the continuously cast ingot, as a result of which a round-section rolled product is obtained, the dimensions of which can be changed by adjusting the work rolls.

 The disadvantage of this design is that it is possible to obtain profiles only of circular cross section.

 A known casting and rolling unit [2], the design of which is adopted as a prototype, containing a sequentially installed continuous casting machine, scissors, a mechanism for removing seeds, a discharge roller table, and also a planetary rolling mill crimping the ingot from four sides to obtain a square profile.

 The disadvantage of this design is the difficulty in matching the speeds of the continuous casting machine and rolling mill, as well as the large length of the unit. In addition, it is impossible to obtain profiles of another assortment, because for this, it is necessary to establish a long stand, for example, step rolling, the working body of which reciprocates along the axis of rolling, while ensuring a large degree of deformation necessary for combining the aggregates.

 The installation of such stands requires the possibility of a mismatch in the speeds of the continuous casting machine and the rolling mill.

 Also, the disadvantages of the known device include the difficulty of removing the seed, which after separation from the ingot must be removed immediately, moving up with additional equipment.

 The problem solved by the invention is to enable the mismatch of speeds of the continuous casting machine and rolling mill by including a loop device for the continuously cast ingot leaving the machine, as well as the possibility of expanding the range of finished products.

 This problem is solved as follows.

 In a known casting and rolling unit containing a continuous casting machine, an outlet roller table and a seed separation device are installed at the outlet thereof, as well as a rolling mill, according to the invention, the rolling mill is arranged parallel to the continuous casting machine, behind the device for separating the seed along the billet vertical guide rollers are mounted, while opposite to them in front of the rolling mill, vertical guide rollers are also mounted, and a rotary izontalnoy plane lever tongs.

 In addition, the first mill stand is made with the possibility of reciprocating movement of the working body along the axis of rolling.

 The drawing shows a General view of the proposed unit in plan.

 The casting and rolling unit consists of a single-strand high-quality continuous casting machine 1, installed sequentially behind it of a discharge roller 2, a device for separating the seed 3 and a rolling mill 4, installed parallel to the continuous casting machine 1.

 At the exit from the continuous casting machine 1, behind the device 3, vertical guide rollers 5 are installed, one pair of which is driven and the other is clamped, while the opposite vertical guide rollers 6 are installed opposite them at the entrance to the rolling stand 4.

 Between the rollers 5, 6 in the middle, a lever 7 is mounted, which can be rotated about the axis 8 in the horizontal plane and equipped with a tongs grab 9.

 The aperture between the discharge roller table 2 and the rolling axis is blocked by a plate deck 10 at the level of the roller table 2 rollers.

 Directly in front of the rolling mill 4, an induction heater 11 is installed at the output of the guide rollers 6.

 Casting and rolling unit operates as follows.

 In the initial position, the rollers 5, 6 are divorced, the tick-borne grip 9 is brought to the rollers 5, the jaw of the gripper 9 is also divorced.

 Liquid metal is poured on machine 1 into an ingot of 12 square sections. After cutting the front end of the ingot and separating the seed, which is rolled along the rolling table 2, the ingot continues to extend on the rolling table 2, the rollers 5 and 6 are divorced.

 After the front end of the ingot 12 exits beyond the limits of the rollers 5, the latter are brought together and they are idling, then, using the lever 7, a tick-shaped gripper 9 is brought to the front end of the ingot 12 and clamped.

As the ingot grows, its front end begins to bend relative to the axis 8 of the lever 7, which, together with the tongs and the clamped end of the ingot 12, describes an arc of a circle of 180 ^° , leading the front end of the ingot 12 to the guide rollers 6.

 After the front end of the ingot 12 is between the rollers 6, they are reduced, the curved part of the ingot 12 rests on the flooring 10, and the rollers 5, 6 take the load from the bending of the ingot.

 Then the tick-borne grip 9 is bred, the drive of the rollers 6 is turned on, and the ingot is fed through the induction heater 11 to the high-quality four-roll mill stand 4 for step rolling, which makes a reciprocating movement of the working body along the axis of rolling.

 After the front end of the ingot is captured by the rolls of the working stand, the rollers 6 are idle and the combined process of casting by machine 1 and rolling in stand 4 takes place, while the casting and rolling speeds do not coincide, and the ingot loop 12 increases or decreases.

 After casting is completed on the machine 1 to push the rear end of the ingot 12 onto the slab floor 10, the drive of the rollers 5 is turned on, and then after the rear end of the ingot 12 comes out of the rollers 6, the lever 7 with the tongs 9 is turned to the initial position to the rollers 5.

 The proposed unit provides the possibility of a mismatch of the casting and rolling speeds, which in the general case will eliminate the difficulty in controlling these speeds. In addition, the mentioned feature allows the use of step rolling stands in combined units, which expands the assortment of products obtained by the combined process.

Sources of information
1. German patent 19720058 A1, MKI B 21 V 1/46
2. Casting and rolling unit. Heavy engineering 5, 1997, fig. 5, p. 6-7.

Claims (1)

A casting and rolling unit containing a continuous casting machine, a discharge roller and a seed separation device installed at the outlet thereof, and a rolling mill, characterized in that the rolling mill is parallel to the continuous casting machine, behind the seed separation device along the direction of travel vertical guide rollers are mounted on the workpieces, while opposite to them, vertical guide rollers are also mounted in front of the rolling mill, and a horizontal swivel is installed between them flaxen plane the lever with a tick capture.