EP2358486B1 - Car and method for transporting a drive spindle for a roller of a roll stand - Google Patents

Description

The invention relates to a carriage for transporting at least one drive spindle for a roll of a roll stand and a method for operating the carriage.

Such cars are basically known in the art. Such is from the German patent application DE 26 02 655 a method and an on device for inserting or removing a drive spindle of a rolling mill stand known. This method is characterized in that the spindle is transported by the removal of the work rolls from the mill stand by a carriage supported by the window of the mill stand from the drive side to the operating side and vice versa. On the carriage a Auslegearm is pivotally mounted and the drive spindles are attached to the Austegearm for transport by means of loops. The device according to this disclosure therefore builds quite high, at least higher than the drive spindles are arranged.

From the Japanese publication JP 55 094 714 discloses a trolley for changing spindles for the work rolls of a rolling stand. The trolley is moved on rails in the rolling direction by the roll stand. The cart includes a transport frame in which the upper drive spindle from above and the lower drive spindle are held from below. If necessary, the carriage is moved along with the spindles via a cable pull through the roll stand.

The invention has for its object to provide an alternative carriage and an alternative method for transporting a work spindle for a roll of a roll stand ready.

This object is achieved by the device technology by the subject of claim 1. Accordingly, the car is characterized in that the carriage is designed as a lift truck with a first support means and a first drive unit, wherein the first drive unit for raising or lowering the first support means possibly with the drive spindle is used relative to a neutral position.

The neutral position in the sense of the invention designates that position of the first and / or second carrier device in which the overall height of the carriage with the two carrier devices is minimal, i.e. minimum. the car is as flat as possible. Lifting or lowering even one of the carriers will increase the overall height of the truck.

The claimed car is so flat that it can be moved under the drive spindle. The claimed training as a lift truck with a first support means advantageously allows the lifting of the support means directly under the drive spindle, so that they can be stored without the aid of a crane directly on the support means and transported away with the car.

For the subsequent assembly of a new or überhotten drive spindle between the mill stand and the drive device for the rolling mill, in particular a pinion gear, the sequence of steps in reverse order: First, the drive spindle is transported on the carrier device in the area between the mill stand and pinion gear. There it is raised by means of the lift truck or the liftable support means to the respective required height to be coupled there to the pinion gear and spindle mounts to the mill stand.

According to a first embodiment, the carriage has a second carrier device which is integrated into the first carrier device 110 and together with the first carrier device 110 relative to the neutral position can be lowered and raised. The provision of two - also relative to each other - height-adjustable support means has the advantage that even higher heights on which the support means must be raised to accommodate the work spindles, can be reached by means of the lift truck without the truck taking thereby losses on its flat design would have to, ie would have to be formed with a larger minimum height.

The second carrier device with the second drive unit is preferably fully integrated into the original height of the lift truck or into the first carrier device from the height.

The above object is further achieved by a method for operating the carriage. The advantages of this method essentially correspond to the advantages mentioned above with respect to the car.

However, it should be mentioned as particularly advantageous that, in particular, the first carrier device can not only be raised beyond the neutral position of the lift truck with the aid of its toggle lever or scissors joint lifting system, but also can be lowered below this neutral position. In the neutral position or in the raised position, the carriage can be moved on the shed floor of the roller hall in which the rolling stand stands. Within the rolling stand, the support means can be lowered below the neutral position, without colliding with the lower support roller, especially after it has been previously lowered itself. The lowering of the support means under the neutral position advantageously allows a process of the carriage with the support means under the head of the drive spindle forth; in the neutral position of its support means of the car would not be moved under the head of the drive spindles in the rule.

Advantageously, the first and / or second support means are lockable at least in their neutral position, the support means give the

Carriage in locked position a much greater stability (torsional stiffness) than in non-locked position.

Further advantageous embodiments of the carriage and the method for its operation are the subject of the dependent claims.

Figur 1

die Arbeitsspindeln in eingebautem Zustand zwischen Walzgerüst und Kammwalzengetriebe;

Figur 2

den erfindungsgemäßen Wagen;

Figur 3

das Einfahren des Wagens durch das Walzgerüst;

Figur 4

das Absenken von insbesondere der ersten Trägereinrichtung unter die Neutralstellung; und

Figur 5

das Verfahren des Wagens mit abgesenkten Trägereinrichtungen unter den Kopf der Antriebsspindel

zeigt.The description is attached to two figures, wherein

FIG. 1

the work spindles in installed condition between roll stand and pinion gear;

FIG. 2

the carriage according to the invention;

FIG. 3

the retraction of the car by the rolling stand;

FIG. 4

the lowering of in particular the first carrier device under the neutral position; and

FIG. 5

the process of the carriage with lowered support means under the head of the drive spindle

shows.

The invention will be described in detail below with reference to the said figures in the form of embodiments. In all figures, the same technical elements are designated by the same reference numerals.

FIG. 1 shows two drive spindles 200, which are arranged between a rolling stand 300 and a drive device 400, in particular a pinion gear for driving the work spindles. The drive spindles are used to drive work rolls in the mill stand 300. The work rolls are typically arranged between the upper and lower support rollers 310a, 310b in the rolling stand. They are, however, in FIG. 1 not shown because they must be removed for the process of the carriage through the mill stand 300 through and are. Furthermore, the carriage 100 according to the invention can be seen for transporting the drive spindles. The carriage has a running unit 105, here for example impellers, in order to move the carriage - possibly with the drive spindles - from the operating side BS of the rolling stand 300 through the rolling stand to the drive side AS or vice versa. The car is basically built so flat that it is movable under the drive spindles 200 and in particular their widened heads 210.

In FIG. 1 the first carrier device 110 is raised as part of the lift truck to the level of the lower or under the lower drive spindle 200. In this position, the drive spindle can be advantageously stored without the aid of a crane on the first support means.

FIG. 2 shows the structural design of the carriage 100 according to the invention in detail with the first and a second support means 110, 112 each in the neutral position. In particular, it can be seen the first carrier device 110, which by means of a first drive means 120, z. B. a hydraulic cylinder, and a first lifting device 116, for example, a toggle lever lifting device, relative to the neutral position can be raised and lowered. The cart may either have only one or both support means, depending on the required total lift height.

The stroke for only one of the support means is limited due to the toggle lever 116. In order to be able to achieve larger strokes beyond this, according to the invention the second carrier device 112 is integrated into the first carrier device 110, the second carrier device in turn being driven by means of a second drive unit 114, e.g. Example in the form of a hydraulic cylinder and a second lifting device 116, for example a second Toggle joint, can be raised or lowered beyond the first support means.

The carriage preferably has its own third drive unit 140 for autonomous movement of the carriage. Alternatively, it can also with the help of external drives, eg. B. a roll changing locomotive, which are coupled via cables to the car to be moved. The running unit 105 of the carriage may be in the form of running wheels or in the form of skids, each for traversing the carriage on rails laid on the floor of a roller house through the rolling stand.

• Verfahren des Wagens 100 unter die Antriebsspindel 200 eines Walzgerüstes 300;
• Anheben einer ersten und/oder zweiten Trägereinrichtung 110, 112 des Wagens unter die Antriebsspindel 200;
• Aufnehmen der Antriebsspindel;
• erforderlichenfalls Absenken der ersten und/oder zweiten Trägereinrichtung mit der Antriebsspindel z. B. bis auf die Neutralstellung; und
• Wegverfahren des Wagens mit der Antriebsspindel 200.

The car is operated according to the invention as follows:

• Method of the carriage 100 under the drive spindle 200 of a rolling mill 300;
• Lifting a first and / or second support means 110, 112 of the carriage under the drive spindle 200;
• Picking up the drive spindle;
• if necessary, lowering the first and / or second support means with the drive spindle z. B. except for the neutral position; and
• Moving away the carriage with the drive spindle 200.

The movement of the carriage under the drive spindle 200 and the path of the carriage can be done through the mill 300 or across the work spindles.

• Der Wagen mit der ersten und ggf. der zweiten Trägereinrichtung in jeweils neutraler oder angehobener Stellung wird in das Walzgerüst mit ausgebauten Arbeitswelzen eingefahren. Die neutrale oder angehobene Stellung der Trä-gereinrichtungen ist erforderlich, damit die Trägereinrichtung beim Hineinfahren nicht mit dem Hüttenflur kollidiert; siehe Figur 3.

Die erste und ggf. zweite Trägereinrichtung wird vor Erreichen des Kopfes 210 der Antriebsspindel 200 innerhalb des Walzgerüstes 300 unter die Neutralstellung und damit unter den Kopf abgesenkt, um unter dem Kopf her verfahren werden zu können; siehe Figur 4 und 5.
Nach Passieren des Kopfes werden die Trägereinrichtungen soweit wie erforderlich - typischerweise über die Neutralstellung hinaus - unter die Antriebsspindel angehoben, um die Antriebsspindel zusammen mit ihrem Kopf aufzunehmen.When the carriage travels to the drive spindles 200 through the rolling stand 300, then the retraction includes the following steps:

• The carriage with the first and possibly the second support means in each neutral or raised position is retracted into the rolling stand with dismantled Arbeitswelzen. The neutral or raised position of the carrying devices is required so that the carrier device does not collide with the hut floor when entering; please refer FIG. 3 ,

The first and possibly second carrier device is lowered before reaching the head 210 of the drive spindle 200 within the rolling stand 300 under the neutral position and thus under the head to be able to be moved under the head; please refer FIG. 4 and 5 ,
After passing the head, the carrier devices are raised as far as necessary, typically beyond the neutral position, under the drive spindle to receive the drive spindle together with its head.

Subsequently, the path of the carriage takes place with the drive spindle, but the first and second support means are not lowered below the Neuträlstellung, so as not to collide with the hut floor.

LIST OF REFERENCE NUMBERS

100

dare

105

running unit

110

first carrier device

112

second carrier device

114

second drive device

116

Lifting device, for example toggle joint or scissors joint

120

first drive device

140

third drive device

200

drive spindles

210

Head of the drive spindles

300

rolling mill

310a

upper support roller

310b

lower support roller

400

Drive device / pinion gear

500

rails

Claims (12)

1. Carriage (100) for transporting at least one drive spindle (200) for a roll of a roll stand (300), wherein the carriage comprises a travel unit (105) and is of such flat construction that is movable with the help of the travel unit under the drive spindle (200), characterised in that carriage is constructed as a stroke carriage with a first carrier device (110) and a first drive unit (120), wherein the first drive unit (120) serves for raising the first carrier device (110) under the drive spindle (200) and for lowering the first carrier device (110) optionally with the drive spindle (200) relative to a neutral setting.
2. Carriage (100) according to claim 1, characterised in that the carriage comprises a second carrier device (112), which is integrated in the first carrier device (110) and is lowerable together with the first carrier device (110) relative to the neutral setting.
3. Carriage (100) according to claim 2, characterised in that associated with the second carrier device (112) is a second drive device (114) for raising or lowering the second carrier device (112) relative to the first carrier device (110).
4. Carriage (100) according to any one of the preceding claims, characterised in that the first and/or second drive unit (120, 114) is or are respectively mechanically coupled by way of a stroke device with the first or second carrier device (110, 112).
5. Carriage (100) according to any one of the preceding claims, characterised in that the travel unit (105) is constructed with running wheels or with runners for moving the carriage preferably on rails (500) laid on the workshop floor of a rolling mill in which the roll stand stands.
6. Carriage (100) according to any one of the preceding claims, characterised by a third drive unit (140) for independent movement of the carriage.
7. Method of operating a carriage (100) according to any one of claims 1 to 6, comprising the following steps:

   - movement of the carriage (100) under the drive spindle (200) of a roll stand (300);

   characterised by:

   - raising a first and/or second carrier device (110, 112) of the carriage under the drive spindle (200);

   - receiving the drive spindle;

   - if required, lowering the first and/or second carrier device together with the drive spindle; and

   - moving away the carriage together with the drive spindle (200).
8. Method according to claim 7, characterised in that the movement of the carriage (100) under the drive spindle (200) is carried out through the roll stand (300) from the operating side (BS) thereof to the drive side (AS) thereof; and the movement away of the carriage is carried out in the reverse direction.
9. Method according to claim 8, characterised in that
   the carriage (100) with the first and optionally second carrier device (110, 112) is moved to a respective neutral or raised setting in the roll stand with demounted working rolls;
   the first and optionally second carrier device (110, 112) before reaching the head (210) of the drive spindle (200) are lowered below the neutral setting and thus under the head;
   the carriage (100) with the lowered first and optionally second carriage device (110, 112) is moved under the head (210) of the drive spindle;
   the first carrier device (10) and/or second carrier device (112) after passing the head is or are sofar as required raised under the drive spindle (200) in order to receive the drive spindle together with its head; and
   the carriage (100) together with the drive spindle (200) is subsequently moved away, wherein, however, the first and second carrier devices are not lowered below the neutral setting.
10. Method according to claim 7, characterised in that the movement of the carriage (100) under the drive spindle (200) and the later movement away of the carriage together with the drive spindle is carried out in each instance transversely to the longitudinal axis of the drive spindle in installed state.
11. Method according to claim 7, characterised in that the movement of the carriage under the drive spindle is carried out through the roll stand (300) and the later movement away of the carriage together with the drive spindle is carried out transversely to the longitudinal axis of the drive spindle in the installed state, or conversely.
12. Method according to any one of claims 7 to 11, characterised in that the first carrier device and/or second carrier device is or are lockable to the carriage at least in the neutral setting, but preferably also in the lowered and/or raised setting.

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