CZ20893A3 - Beating engine mounting in a rolling mill stand - Google Patents

Abstract

The apparatus comprises a base, a pair of grinding rolls 5.1, 5.2 mounted on respective pairs of roll carriers 8.1, 8.2 and 10.1. 10.2, adjusting means 14 for adjusting the grinding gap 6; the assembly of rolls, carriers and adjusting means represents an exchangeable assembly; the carriers 8.1, 8.2 are pivotably mounted at the base and the carriers 10.1, 10.2 are pivotably mounted at carriers 8.1, 8.2 (Figures 1, 2) or at the base (Figure 4). As shown, a feed slide with feed roll pair 4 serves for regulation of stock to be milled. Roll carriers 8.1, 8.2 are mounted at members 1.1,1.2 by way of inlet bushings 15.1, 15.2 or bearing blocks 18.1, 16.2 connected by vibration clamps 17.1, 17.2 with members 1.1, 1.2. Adjusting means comprising spindle 14 connected to carrier pairs at pivot points 18, 19 at least one of which has eccentric form. <IMAGE>

Description

Storage of dutchers re rolling etclici; ..

Booze techniques ~ ^- - -Vynález is used in grinding plants and relates to a beater storing in a roll stand comprising a stand which is supported on a base, a pair of beaters and a device for adjusting the relative distances of these hollander beaters and wherein the recess also themselves form beaters separate units detachable from the rolling mill.

BACKGROUND OF THE INVENTION

The rollers of the rolling mill carry considerable static and dynamic loads during milling. This dynamic load, caused by high grinding pressures, arises during milling, with extremely high dynamic forces, especially in the case of smooth rolls and low roll presentation. The ever-increasing specific power amplifies this phenomenon. Usually, these forces are transmitted to the side walls via a seat fixed in the side walls. This causes undesirable vibrations of the side walls and also noise, these side walls must be made very strong and stable. This requires a heavy and costly shell design.

AND

DE-OS 27 30 166 discloses a solution which attenuates this undesirable effect. A stable support frame is formed beneath the pair of dutchers by which the bearings of the dutchers are supported. The supporting frame is supported by an intermediate link in the base beam of the rolling mill. A pair of dutchers and individual functional elements are assembled into a building unit. This construction unit is easily removable from the rolling stand and can be replaced in case of wear and other occasions.

Dynamic forces are absorbed in the support frame and do not transfer as much as they do to the side wall. In this solution, it is disadvantageous that the side walls must nevertheless be made very stable, since, in addition to the dynamic forces that remain, also considerable static forces can be transmitted from said building unit. However, vibration damping® is still not completely prevented. Since the large side walls formed on the foundation® base transmit oscillations, noise is not prevented when the frequency is small.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for accommodating a pair of dutchers which also detects the oscillation of the support stand caused by the dynamic load of the dutchers during flight.

The object is achieved by the features set forth in the characterizing part of the main claim of the invention.

The solution according to the invention has the advantage that the noise level on the floor of the mill is significantly reduced when the mill is installed. The use of the invention makes it possible to provide a lightweight construction of the rolling mill casing, in particular a side wall construction, since this construction has only a supporting function and serves to support the supply device. This saves material and also reduces the limit loads at the installation site.

For the manufacturer, the design of the rolling mill according to the invention results in high stability, further reduced noise load, ease of operation when replacing rollers, and the possibility of adjusting the rolling mill at low cost to a different rolling diameter if necessary.

Description of the drawings

The apparatus is further illustrated in the following examples. The corresponding figures have the following meaning.

FIG. 1 is a schematic illustration of a rolling mill and an apparatus according to the invention. Only half of the duplex mill stand is shown.

FIG. 2 shows an arrangement of the dutchers according to the invention. The rolling stand is caught by the operator.

Fig. 3: Display of the same rolling stand with the use of dutchers and a larger diameter.

FIG. 4 shows another variant of the device according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

As can be seen from FIG. 1, according to the type of rolling mill, it consists of a base frame which is formed behind the base frames 1.1 and 1.2 and a central fixed central wall.

An inlet 6 is formed in the upper part of the rolling mill. A slider (not shown) with a pair of feed rollers 4 serves to regulate the feed of the ground goods. The regulation of the supply of the milled goods and the construction elements necessary for this are not related to the invention and are neither shown nor described here.

A pair of dutchers is located beneath the pair of feed rollers

5. & the first Hollander 5.1 and the second Hollander £ χ2. There is a grinding gap δ between the Dutch 5.1 and 5.2.

FIG. 1 in conjunction with FIG. Here, the base frames 1.1 and 1 »2 deployed on the basis of 2 · ^e j 2 basis usually flooring mill. A carrier is formed on the front side of the first dutchers 5.1

8.1. or 8.2, the cylinder, being mounted at the articulation point

13.1. or 13 »2. The roller supports 3.1, 8.2 raise the roller pins 9,1 and 9.2 formed on the front wall of the first ducts III in the position of the ducts not shown in greater detail. The second holland 5.2 is arranged on a further pair of roller supports 10.1 and 10, 2. The roll pins 11, 11 and 11.2 are mounted on the roller carriers 10,1 and 10.2 analogously to the first Hollander 5,1. The roller supports 10,1 and 10,2 are rotatably mounted at the hinge points 12.1 and 12.2.

Giant. 4 shows another embodiment of the support arrangement 5.1,

8.2 and 10.1, 10.2 cylinders. Here are the hinge points 12.1 and 12.2. formed on the roller bearings 10.1 and 10.2, in extreme cases identical to the articulated *! points 13.1 and 13.2 of roller carriers 8.1 and 8.2.

-f <· * y. 4 w λ *, T Os / V and 12.2 in the rocks of the perimeter, that is, in the immediate vicinity of the 5.1 and 5.2 Hollanders. since it forms the carrier of the cylinder 8.1 and

8.2 with guide * shafts * 14. desirable * to fix carriers together 3.1. 8.2 rollers, or roller carriers 10.1 and 10.2, a stable unit. The grinding forces occurring are passed through this unit briefly so that they cannot be externally applied.

Supports S.j. and 8.2 of the cylinder is provided via the damping ring 15.1 and 15.2. fixed in the base * wound

1.1 and 1.2. or via bearing bushings 16.1 and 16.2. which are connected to the base * frames * 1.1 and 1.2 via a suitable 17.1 and 17.2 vibration damper.

The adjustment of the grinding gap 6 is carried out by varying the angle between the roller supports 8 and the roller supports 10. The fixation is effected by a guide shaft 16, which is mounted between the articulated points 18 and 19 on the first and second axes, respectively. The second group of carriers, the articulated points 18 and 19 at the first, respectively. The second group of supports are preferably formed above the mounting of the roller pins 2, 11 on the roller supports 3 and 10. At least one of the hinge points 18, 19, respectively, respectively. the second group of carriers is eccentric. The rotation of the eccentric in the mechanical, electromechanical, pneumatic or hydraulic control unit 23 by means of the lever 10 changes the movement of the roller carrier 10 to the roller carrier 3 The cage gap 6, the roller carriers 3 are fixed to the central wall 2 by a connecting rod 21.

In the arrangement according to the invention, all of the forces exerted by the street forces are guided through the base frame 1.1 and 1.2 into the foundation 2. The dynamic and static allive forces are transmitted inside the roller support unit 8, 10 and the guide shaft 14 and do not protrude. The central wall 2, which is still attached to the machine base, only serves to fix the roller support 8 via the connecting rod 21. The side walls 22, which are located between the face shields of the dutchers 2 ^and the roller supports 8, 10 serve only to seal against cotton wool dust. and does not bring any static or dynanic forces.

The oscillation caused by the dynamic grinding forces and the shadow produced by the sound transmission in the solid body are further reduced by the damping ring 15.1 and 15 * 2 or the vibration damper 17.1 and 17 * 2, so that there is no sound transmission to the machine base and base 7.

In this way, substantial material savings can be achieved when dimensioning the machine base as well as the side wall 22. Nevertheless, the assembly unit consisting of a pair of dutchers 2 in conjunction with the roll carriers 8, 10 is shown to be replaceable. Thus, the operator becomes uncomplicated, since the entire unit, consisting of a pair of holland carriers 10, 10, including the adjuster unit 23, can be lifted around the hinge point 13 according to the design of the connecting rod 21.

A further advantage is evident from Fig. 3. Here is shown a further arrangement of a pair of dutchers 2 · As already mentioned, the device according to the invention allows the exchange of a pair of dutchers 2 · That is, as shown in Fig. 3 a pair of dutchers 2 ³ different diameter and thus

4, another technology may be implemented. In recent years, an average of 2,250 au dutchers has been applied with a special frequency in wheat drift, but this is not optimal for rye drift and a diameter greater than 3CC au is required. Especially for loss of use and for the comparison of the 3 conventional mill designs of large rollers, dutches of greater than 300 mm are not offered. The simple and lightweight construction of the casing allows parallel rolling of the mill stand with the same dimensions as the 3 millers of 2 ° 250 mm diameter, arranged in parallel, without the large technical costs, also with 2 larger diameters in a diagonal configuration. In the case of a duplex mill, for example, one side can be fitted with 315 mm diameter dutchers and the other side of a 2 θ diameter dutch with a diameter of 25Ο pcs. Also, the additional conversion to a different diameter of the dutchers 2 is legible without great technical expense.

A further advantage results from the fact that the design of the rolling mill according to the invention achieves favorable manufacturing conditions in addition to material savings, since the desired higher rolling mill accuracy is substantially concentrated on the roll supports 8 and 10 and does not need to be reworked O

Claims (7)

3) Placing of the dutchers in a rolling mill, consisting of a base which is supported on the foundations (7), a pair of dutchers (5) and a device for adjusting the mutual distance of these dancers (5), where the dutchers (;) and the dutchers (5) lie. they themselves form separate units, detachable from the rolling mill, characterized in that each roller pin (9.1, 9 * 2) formed on the first holanders (5 * 1) is located on a roller support (8.1, 8.2) which is located on the base (7), and each cylinder pin (11.1, 11.2) formed on the second ® Hollander (5.2) is located on the cylinder support (10.1, 10.2) which is supported on the cylinder support (8.1, 8.2) and which is rotatable at the hinge point (12.1, 12.2). 2) the bearing of the dies in the rolling mill according to claim 1, characterized in that a bearing bush (16.1, 16.2) is provided on the base frame (1.1, 1 · 2), which forms a hinge point (13.1, 13.2) in which a roller support (8.1, 8.2) is mounted. 3) Placing of the burners in a rolling mill according to claims 1) and 2) characterized in that the hinge point (13.1, 13.2) is flush with the 3 hinge point (12.1, 12.2). 4) The positioning of the burners in the rolling mill according to claims 1) to 4 3) characterized in that the roller carrier (8.1, 8.2) is mounted in the bearing housing (16.1, 16.2) via a damping ring (15.1, 15.2). 5) Embedding of the burners in a rolling mill according to claims 1) to 5) 4) characterized in that the bearing bore (16.1, 16.2) is connected to the base frame (1.1, 1.2) via an oscillator (17.1, 17.2). 6. The mill stand in the rolling mill as claimed in claim 1, characterized in that in the upper part of the two pairs of roller supports (8.1, 8.2 and 10.1, 10.2) there are articulated points (18.1, 18.2 and 19.1, 19.2) for connecting the guide. shafts (14 ''), at least one of which is eccentric and connected to the care (20). 7) The bearing of a diester in a rolling mill as claimed in claims 1) to 6), characterized in that the lever (2C) is articulated when connected to an adjusting unit (23) which is articulated and a pair of carriers (8.1, 8.2 or 10.1). 10.2) rollers.