JPH03210910A - Rolling mill - Google Patents

Abstract

PURPOSE:To realize the simplification and certainty of connection by connecting a roll with a driving shaft with a pin and drawing out with an actuator in a driving shaft for transmitting power which follow up the shift of rolling mill in the axial direction of roll. CONSTITUTION:In the rolling mill with the driving shaft 6 with which the driving power is transmitted by following up the roll which is moved in the axial direction with a shifting device which consists of a shift cylinder 8, shift frame 9 and shift lever 10, the connection in the axial direction of the roll 3 and driving shaft 6 is executed with the pin 22 and they are drawn out by operating the actuator 20. In this way, the structure of driving shaft is simplified and certainty of connection is improved and also maintenance and inspection can be made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to rolls and drive shafts in a rolling setup, and more particularly to the axial connection of the drive shaft and rolls to follow roll shifts in a rolling mill.

[Conventional technology]

Conventional rolling mills have a spring built into the drive shaft, as described in Japanese Patent Application Laid-open No. 59-156510.

The force of the spring in the piece caused the drive shaft to follow the shift movement of the roll.

[Problem to be solved by the invention]

Since the above conventional technology relies on spring force to follow the roll, there is a natural limit to that force depending on the size of the drive shaft, so if the sliding resistance between the fixed part and the moving part in the drive shaft becomes large, Since it is impossible to follow the roll and there is a risk that the roll and drive shaft may come off, a sensor must be used to detect this stop. cannot be inserted, and the drive shaft escapes. Additionally, at the roll change position, a stopper is installed to stop the drive shaft at the end of the shift stroke when the spring is fully extended, or if it is in the middle.

Additionally, a device was required to support the drive shaft when the rolls came off.

rII! ! Means for Solving Problem i] In order to achieve the above object, the present invention connects the roll and the drive shaft directly with a pin, and extracts the pin using an actuator installed at the roll changing position. Further, a sensor for confirming separation is provided on the actuator side, and a device supporting the drive shaft is coupled to a frame supporting the actuator when changing rolls.

[Effect]

The drive shaft for power transmission that follows the axial shift of the roll has a pin installed on the roll drive shaft that is inserted into a hole on the roll side by spring force, so that the axial force from the roll side is transmitted through this pin. is transmitted to the roll side, and the drive shaft can be shifted to reliably follow the roll. Furthermore, when the drive shaft is removed from the roll during roll recombination, the pin is separated from the roll using an actuator formed on the outer periphery of the drive shaft and a liquid sealed within the drive shaft. When this pin comes off, a sensor detects it and the roll can be removed.

Furthermore, a holding device equipped with a separate actuator that supports the drive shaft when the roll is removed from the drive shaft can be coupled to the actuator support frame. Alternatively, an actuator that extracts the pin for connecting the roll and the drive shaft operates, and supports the drive shaft at the same time as the pin is extracted.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial sectional view of the rolling state according to the present invention, and the upper and lower halves show the state in which the roll 3 is being moved by shifting. The operating side bearing box 4 and the driving side bearing box 5 guided by the operating side housing 1 and the driving side housing 2 are equipped with a roll 3, and the roll 3 transmits the power from the motor via the pinion stand 7 and the drive shaft 6. The material to be rolled is rolled. The axial shift of the roll 3 is performed by a frame 9 attached to the operation side housing 1.
By the shift cylinder 8 supported by the block 14,
Pin 18. Lever 102 rotation block 17. This is done by moving the operating side bearing box 4 via the pin 16. Further, the drive shaft 6 is composed of a roll coupling 6a, an intermediate shaft 6b, and a fixed side coupling 6c, and when the roll 3 shifts in the axial direction, a pin 22 installed in the roll coupling 6a causes the shaft to move from the roll 3. The force in the direction is transmitted to the roll coupling 6a, and the intermediate shaft 6b engaged therewith can move in the axial direction while being guided by the fixed coupling 6C. Further, convex teeth are provided on both sides of the intermediate shaft 6b, and the fixed side coupling 6c and the roll coupling 6a are provided on these teeth.
The power from the pinion stand 7 is transmitted to the roll 3 by the incisors of the pinion stand 7 meshing with each other. As described above, power is transmitted to the roll 3 at any position within the shift stroke, and the material to be rolled can be rolled. Third
The operation of the fixing pin 22 will be explained with reference to the drawings. The upper half shows the rolling state, and the lower half shows the roll reshuffling state. In the rolling state, the pin 22 pops out from the inner part of the roll coupling 6a by the force of the spring 26, and by inserting this part into a hole provided in the roll 3, it is possible to connect the roll 3 and the roll coupling 6a in the axial direction. Make it. pin 2
2 is a bushing 23 inserted into the roll coupling 6a.
and the sleeve 24 guided by the bushing 23, and the spring 26 pushes out the d portion radially inward to a position where it touches the bushing 23.

The sleeve 24, which is pushed in the outer circumferential direction by the spring 26, is attached to a stopper 2 fixed to the roll coupling 6a with a bolt.
It is held at 5. Also, bush 23, pin 22. The liquid 27 sealed in the sleeve 24 is O to prevent it from leaking to the outside.
It is sealed with rings 28, 29 and 30. Next, the case of rearranging the roles will be explained. FIG. 2 is a diagram showing the state of recombining the rolls. First, the shift cylinder 8 shifts the rolls 3 to the recombining position. (See the upper half of the figure) Next, the actuator 20 is operated to pull out the pin 22 from the roll 3. This detailed explanation will be explained with reference to the lower diagram of FIG. When the actuator 20 fixed to the drive-side housing 2 and mounted on the frame 19 is operated in the direction of the roll coupling 6a, the actuator 20 and the pin 36. bracket 3
The pin 31 engaged through the roll coupling 6a
Push the sleeve 24 attached to the. When the sleeve 24 is pushed, the pressure of the liquid 27 increases, and the pressure acts to pull out the pin 22 in the outer circumferential direction. When this pulling out force becomes larger than the force of the spring 26 and the resistance force of the pin 22, the pin 22 is pulled out in the outer circumferential direction, as shown in FIG. Further, when the pin 22 is pulled out in the outer circumferential direction, the striker 3 is attached to the inside of the pin 31 and held by a spring 34.
Push out 2 toward the outer circumference. At the position where the pin 22 is pulled out from the roll 3, the sensor 37 detects that the striker 32 has been pulled out. Also, the pin 31 is connected to the frame 19
It is guided by a bushing 33 inserted into the shaft so that it can move only in one axis direction. The sensor 37 is fixed to the bracket 35, as shown in FIG. 5, and is adapted to move together with the pin 31.

The liquid 27 in the roll coupling 6a flows through the ○ ring 28~
If the pressure does not increase due to damage to pin 22,
Since the striker 32 is not pulled out from the roll 3, the striker 32 is not pushed out in the outer circumferential direction and is not detected by the sensor 37.

Therefore, the location of the problem can be detected remotely. Next, the vertical movement of the roll 3 will be explained with reference to FIG. The left half shows the rolling state, and the right half shows the roll change state.

The roll rearrangement height is determined by lifting the axle 39 attached to the auto spacer 40 inserted into the lower roll bearing boxes 4b, 5b with the rail 38, and moving it through the lower roll bearing boxes 4b, 5b and the upper roll bearing boxes 4a, 5a. to set the upper and lower rolls 3 to a predetermined height. Next, in FIG. 6, the left half for explaining the support of the roll coupling 6a shows a rolling state, and the right half shows a roll rearranging state. When an actuator 44 provided on the frame 19 is operated, a lever 46 held on the frame 19 via a pin 47 is engaged via a pin 48, and the lever 46 rotates. The roll cup 6a is supported by a roller 45 supported by a lever 46, and can also be held in the axial direction. On the other hand, it is also possible to support the roll coupling 6a with the roller 45 and perform positioning in the roll axis direction using the pin 38 and the stopper 25 fixed to the roll coupling 6a. When changing the rolls, after supporting the roll 3 and holding the roll coupling 6a, the clamp 15 that holds the roll 3 in the axial direction is attached to the lever 10, as shown in the lower part of FIG. By opening the cylinder 13, the roll 3 is pulled out to the operation side, and then a new roll 3 is installed.

At this time, even if the centers of the new roll 3 and the roll coupling 6a are slightly misaligned, the roll coupling 6a is mechanically held in the roll axis direction, so the pinion stand 7
There is no escape to the side, and insertion of the roll 3 and drive shaft 6a can be confirmed reliably.

After these insertions are completed, the rolling state is returned to the rolling state by the reverse procedure described so far. FIG. 6 shows a method in which the actuator 48 is used to move the connecting pin 22 between the roll 3 and the roll coupling 6a in and out, and to support the roll coupling 6a. When the actuator 48 is pushed toward the roll coupling 6a, the frame 49 holds the roll coupling, pulls out the pin 22 via the pin 35, and moves the roll coupling 6a in the axial direction. This pin 35 and the stopper 25 are used to hold the pin 35 and the stopper 25.

〔Effect of the invention〕

According to the present invention, there are the following effects.

1) The drive shaft has a simple structure and the shaft diameter can be reduced.

2) The force for shifting the rolls can be reduced.

3) There is no need for a sensor to detect whether the drive shaft is following the shift operation of the rolls.

4) When inserting the roll into the drive shaft, there is no need for a sensor to check whether the drive shaft has been inserted without slipping out.

5) Role change position i! (axial direction) can be set to any position.

6) Maintenance and inspection become easier.

[Brief explanation of drawings]

Fig. 1 is a circular cross-sectional view showing the rolling state of an embodiment of the present invention, Fig. 2 is a partial cross-sectional view showing the roll rearrangement state, and Fig. 3 is a cross-sectional view showing the connection between the rolls and the drive shaft. Figure 4 is a cross section taken along the mV-IV line in Figures 1 and 2, and Figure 5 is a cross-section of Figure 3 between ■ and ■.
A sectional view, FIG. 6 is a sectional view taken along the line Vl-VI in FIG.
FIG. 7 is a sectional view of another embodiment showing the right corner of FIG. 6. DESCRIPTION OF SYMBOLS 1... Operating side housing, 2... Drive side housing, 3... Roll, 4... Operating side bearing box, 5... Drive side shaft box, 6... Drive shaft, 7... ... Pinion stand, 8... Shift cylinder, 9... Shift frame, 10... Shift lever-119... Frame, 20
...actuator 22...pin.

Claims (1)

[Scope of Claims] 1. A rolling mill having a shift device that moves the rolls in the axial direction, and in which a drive shaft that transmits power following the axial shift of the rolls is shiftable, comprising: the rolls and the drive shaft; The axial connection is made with a pin,
A rolling mill characterized in that extraction is performed by operating an actuator from the outer periphery of the drive shaft. 2. The rolling mill according to claim 1, wherein the actuator is equipped with a sensor for detecting separation of the pin. 3. The rolling mill according to claim 1, further comprising a device that supports the drive shaft in the direction of its own weight when the roll is extracted from the drive shaft, and is coupled to the actuator support frame. 4. The rolling mill according to claim 1, wherein the actuator is capable of supporting the drive shaft in the axial direction of the roll and in the direction of its own weight when the connecting pin between the roll and the drive shaft is pulled out by the actuator.