DD228391B1 - MAGNET BRAKE SHIFTER FOR A REVERSE ROLL BEFORE THE COOLER BED - Google Patents

Description

According to the invention the object is achieved by a magnetic brake slide, wherein the magnetic brake slide is covered by a active braking surface forming wear plate made of non-magnetizable material and the wear plate in the region of the rolling stock on the Magnetschenkelendflächen holes, which with magnetically good conductive material, according to the plate thickness, are filled in and also form the magnetic poles.

It is also inventive that the holes in the wear plate in a, the smallest be braked rod-shaped rolling corresponding to certain distance from the edge of the wear element of the intermediate wall are provided.

The functional sequence of deceleration of rod-shaped rolling stock is the following:

The rolling stock to be braked runs on the rollers of the run-up roller table and is guided laterally by the intermediate walls.

Between the roller table rollers the magnetic brake according to the invention are arranged, which have a U-magnet system below the filled holes of the wear plate, which consists of pole legs, magnetic yokes with coils over which the magnetic poles are magnetically induced. If the braking operation is initiated, the magnetic brake slides are lifted above the plane of the roller table rollers, the incoming rolling stock is detected by the magnetic poles, at this moment the magnetic circuit is closed, and the rolling stock is decelerated. Due to the defined arrangement of filled with conductive material holes in the wear plate and thus the magnetic poles a defined Magnetkraftflußverlauf is given.

Since the wear plate of the magnetic brake slide is made of non-magnetizable material and only designed as magnetic poles holes, provided in a certain position on the wear plate, cause braking, both a defined Magnetkraftflußverlauf and an exact Walzgutverlauf is given. As a result, the rolling stock is kept away from the intermediate walls, which means a smooth course of the rolling stock.

embodiment

The invention will be explained in more detail below. The drawing shows in

1 is a sectional view of the Auflaufrollganges with magnetic brake slide and fixed intermediate wall, Fig. 2 is a sectional view of the Auflaufrollganges with befindlichem in upward movement magnetic brake valve and fixed partition,

3: the magnetic brake slide in plan view,

4 shows a side view of the magnetic brake valve, partly in section.

The run-up roller table shown in Figure 1 shows a running on the roller table roller 1 roll profile 2. Below the rolled section 2 and the roller table roller 1, the magnetic brake slide 3 is provided in the initial position. The magnetic brake slide 3 is covered with the non-magnetic wear plate 4 upwards. The wear plate 4 has immediately below the current rolling profile 2 holes 5, which are filled with good magnetic good conducting material and thus also form the magnetic poles of the magnet system. The strength of the material located in the holes 5 corresponds to the plate thickness of the wear plate 4, whereby an abutment of the current rolled section 2 is excluded. The position of the rolled section 2 on the wear plate 4 of the magnetic brake slide 3 and the magnetic poles when the magnetic brake slide 3 is raised can be seen in FIG. Due to the specific arrangement of the holes 5 and thus the magnetic poles on the wear plate 4 a certain course of the rolled section 2 is defined. From this figure it can be seen that the "magnetic edge effect" of the magnetic poles running with a relatively small cross-sectional area rolled section 2 "at a corresponding distance from the wear element 6 of the intermediate wall 7 is" held ".

Figures 3 and 4 show, for further clarification, the most important features of the inventive magnetic brake slide 3. It is shown again that the rolled section 2 both on the existing non-magnetic material wear plate 4 as well as on a resultant of the geometric shape portion of the magnetic poles directly on the edge the active braking surface is located. The located in a certain distance from the edge of the braking surface in the holes 5 magnetic poles are applied to its underside U-magnet systems, consisting of the pole pieces 8; 9; 10; 11 and the magnetic yokes 12; 13, with the corresponding associated coils 14; 15 magnetically induced. The advantage of the invention lies in particular in the defined course of the rolled section 2, which causes a significant reduction in wear and means trouble-free and smooth running of the rolled section 2.

Claims (2)

Magnetic brake slide for a caster roll front cooling bed with a magnetic brake valve encapsulated in the magnet system, characterized in that in the bores (5) of the active braking surface forming, non-magnetizable material wear plate (4) Polendflächen the underneath mounted U-magnet system, with the active braking surface the magnetic brake slide flush final, are arranged. For this 2 pages drawings Field of application of the invention The invention relates to a magnetic brake slide for Auflaufrollgänge before the cooling bed, in which provided in the magnetic brake slide magnets cause braking of the incoming on the Auflaufrollgang rolling rod. Characteristic of the known technical solutions The generation of an additional braking force by means of electric or permanent magnets for braking thermomechanically treated, d. H. Below the Curie temperature lying, rod-shaped rolling profiles in the Auflaufrollgang before the cooling bed with the aim to reduce the Gesamtbremsweg especially at high rolling speeds, is known. In this case, permanent magnet systems are arranged in the interior of the Aushebeschieber and in the fixed partitions of a lifting device (SU patent 280415). Known manner, the brake magnets are designed such that the rod-shaped rolling profiles slide on the leading out to the braking surface Polendflächen multipole open electric or permanent magnet systems, the profiles form a magnetic yoke and also consist of the elements between the poles of magnetically non-conductive material or only one form an insignificant shunt to Magnetflußrichtung by the profile. A disadvantage of the described design of the magnet systems is that only a significant braking effect occurs when the bar-shaped rolling profiles bridge the Polendflächen with minimal air gap between the profile and Polendfläche. Particularly in the case of rolling profiles running up at high rolling speeds, there is a great deal of uneven running, which excludes a good and constant support on the magnetic poles. By this irregular contact strongly fluctuating braking forces and thus increased braking distances are achieved, which then make increased demands to equalize the profiles on the cooling bed necessary. Thus, a solution is already described in WP 142157, which relates to an arrangement of electric or permanent magnets and their training in which the magnetic force is distributed very evenly on the Aushebeschieberfläche in the conveying direction of the incoming rolled sections and thus the braking distances even in turbulent running of the bar profiles in tight limits are kept and an irregular wear of the braking surface is avoided. In this case, the Polendflächen the magnet systems are arranged directly on the underside of the active braking surface, and the active braking surface consists of a magnetically conductive material with respect to steel lower saturation induction, preferably gray cast iron, and the pole spacings of the attached to the underside of the active braking surface magnets are the material thickness of Brake surface in a certain ratio. As a result, the strong flux leakage emerging from the material of the braking surface which is saturated by the designed magnetic field detects the leading rolling rod over a wide range and presses against the braking surface. The consequence of pressing is that a groove develops in the region of the current rolling rod and thus, in particular in fine steel, an exact braking of rolled rods of smaller diameter is excluded. This disadvantage is further supported by the fact that in the case of continuously operating cooling bed adjustments, the axes of the run-up roller rollers and thus also the active braking surfaces of the brake magnets or lifting slides arranged between these rollers are inclined at an angle of approximately 10 ° to the horizontal. Due to these facts cause the braked during the lifting rod-shaped rolling profiles on the inclined part of the braking surface and on the fixed partition a great deal of wear. This is particularly the case with small profiles that accumulate at high speeds. In particular, the wear effect on the stationary intermediate wall has a disadvantageous effect on the lifting process and under certain circumstances leads to the clamping of small rolled profiles and to the destruction of the stationary intermediate wall or the lifting slide. Object of the invention The aim of the invention is to increase the service life of the wearing parts of the lifting system, in particular the fixed intermediate wall, in order to reduce the relatively frequent change of the wear elements. Explanation of the essence of the invention The invention has the object zug round to develop a magnetic brake slide, which keeps the braked by the appropriate design of the active braking surfaces and their arrangement of electric or permanent magnets to be braked by the partition and the magnetic braking force acts locally on the roll profile to be braked.