JPH0527485B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for adjusting the distance between surfaces of rollers supported on an eccentric shaft.

(Prior art) Conventionally, for example, as a surface adjustment device for rollers applied to a long steel rolling mill, the Japanese Patent Application Laid-Open No. 1986-
There is one described in Publication No. 27411. In this system, an eccentric shaft that rotatably supports the roller is installed upright in a guide box, and a support shaft is connected to the top of the eccentric shaft.
A worm wheel is provided on the support shaft, and a worm gear is meshed with the worm wheel.By turning the worm gear, the support shaft of the eccentric shaft moves eccentrically in accordance with the rotation direction of the roller. This movement adjusts the distance between the surfaces of the rollers.

For example, in the finish rolling process of wire rods, when shaping rolling is performed using skin pass rollers in order to make the rolled material that has passed through the finishing roll into a product with even higher roundness, the adjustment between the surfaces of the rollers is done numerically. It must be done accordingly. Therefore, in the past, the distance between the surfaces was measured using a gauge bar, and the distance between the surfaces was adjusted based on this value.

(Problem to be solved by the invention) Measuring numerical values using a gauge bar and making adjustments based on the measured values requires inserting the gauge bar and checking the numerical values, making it difficult to adjust between the roller surfaces. The problem is that it is time-consuming and difficult to achieve accuracy. Recently, in order to improve the finishing accuracy of rolled materials, the finished dimensions of rolled materials during rolling have been
There is a demand for fine-tuning the center-to-center dimensions of the rollers by providing feedback to the skin pass equipment that is currently operating online to improve the finishing accuracy of the product. In response to such requests, conventional methods require adjusting the face-to-face dimensions of the rollers and then inserting a gauge bar between the rollers again, which eliminates the need to stop the rolling line once for adjustment. This was a cause of a decline in the factory's operating efficiency. In addition, when adjusting the face-to-face adjustment of the rollers using a gauge bar, the adjustment result cannot be confirmed numerically, so there is a problem that skill is required for the operation. Furthermore, even if the adjustment is made online, the distance W between the eccentric shafts is calculated using the following formula, W=w±(e×Sinθ ), so the distance R between the surfaces of the rollers used is
If the diameter of the roller is Rd, it is expressed as R=W-Rd. For example, when rotating the worm gear to adjust the distance between the roller surfaces, the rotation speed of the worm gear and the amount of deviation of the distance R are Since there is no proportional relationship between the two, and the amount of deviation of the roller face-to-face dimension per one revolution of the worm gear is not constant, record the number of revolutions of the worm wheel and calculate according to the above formula. The adjustment work required even more skill.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roller face-to-face adjustment device in a rolling mill that can accurately display and adjust the face-to-face distance of the rollers with a simple structure.

(Means for solving the problem) The present invention is rotatably supported by a case body,
a pair of eccentric shafts that rotatably support a pair of rollers whose roller surfaces face each other; a pair of support shaft portions that are eccentric to each of the eccentric shafts and integrally provided with each of the eccentric shafts; a pair of worm wheels provided integrally with the support shaft; a worm gear shaft having a pair of worm gears having opposite threads that mesh with each of the worm wheels; and a worm gear shaft provided integrally with each of the worm wheels concentrically with each of the eccentric shafts. a pair of measurement shafts provided in the measurement shaft; and a center-to-center detection device provided between the two measurement shafts that detects the amount of change in the distance between the two shafts and outputs an electrical signal representing this amount of change. A calculation unit that calculates the distance between the surfaces of both rollers based on the electrical signal of the center-to-center detection unit; and a display unit that displays the distance between the surfaces calculated by the calculation unit. This is a device for adjusting the distance between rollers in a rolling mill.

(Function) The amount of change in the distance between a pair of measuring shafts provided concentrically with a pair of eccentric shafts that rotatably support the rollers is determined by the distance between the centers provided between both measuring shafts. The distance between the surfaces of the rollers detected by the detection unit and calculated by the calculation unit based on the electric signal representing the amount of change output from the detection unit is displayed on the display unit, and when the worm gear shaft is rotated,
This rotation is transmitted to a pair of worm wheels via a pair of worm gears, and each measuring shaft that is concentric with each eccentric shaft, that is, eccentric with respect to each support shaft, moves in the circumferential direction. As a result, the distance between both measuring shafts changes, and thereby the distance between both eccentric shafts, that is, the distance between the surfaces of both rollers is adjusted.

(Example) Examples of the present invention will be described below.

In Figures 1 and 2, a pair of eccentric shafts 2, 2a are rotatably installed on a guide box (case main body) 1, and each eccentric shaft has a supporting shaft part 3, 3a integrally attached to its upper part. It is connected in a specific way. Eccentric shaft 2, 2
Rollers 4, 4a are rotatably supported on shaft a. Worm foils 5, 5a are provided on the support shafts 3, 3a. Worm gears 8 and 8a, which are provided on a worm gear shaft 7 that is rotatably supported by a bearing 6 provided on the guide box 1, are meshed with the worm wheel.

Incidentally, measurement shaft portions 9, 9a concentric with the eccentric shafts 2, 2a are erected on the worm wheels 5, 5a. Both shafts have holes 1 in a cover 11 fixed to the top of the guide box 1 with bolts 10.
2 and 12 and protrudes upward from the cover. The size of the holes 12, 12 is determined by the measurement shaft portions 9, 9 inside the holes.
a is movable. As shown in FIGS. 1 and 3, between the two measuring shafts, there are two measuring shafts 9,
A linear gauge 13, which is a center-to-center detection section that detects the amount of change in the distance between the two 9a and outputs an electric signal representing this amount of change, is installed horizontally. A support pin 131 protrudes from one end of the main body of the linear gauge 13, and a gauge pin 132 protrudes from the other end so as to be movable forward and backward using spring force. Attachment rings 131a and 132a are provided at the tips of both pins 131 and 132, respectively, and each ring fits into the measurement shaft portions 9 and 9a, and the collar 13 that is pre-attached to each shaft
3, place it on 133, and tighten the setscrew 1 from above the shaft.
34, 134, and is rotatably held around a shaft portion. A threaded portion 13 is provided at the base of the support pin 131.
1b is formed, and is screwed to the main body of the linear gauge 13, and the connection is fixed with a nut 131c. Further, the gauge pin 132 is connected to the measuring shaft portions 9, 9.
It advances or retreats from the gauge body by changing the distance between a. From the linear gauge 13, the measurement shaft 9,
The fourth pulse signal corresponds to the amount of change in the distance between 9a and 9a.
It is sent to the measuring section 14 shown in the figure. The measurement unit 14 is
It is electrically connected to the linear gauge 13 by a wiring 15. The measurement section 14 includes a calculation section 14a and a display section 14b. The signal sent from the linear gauge 13 is sent to the calculation unit 14a, and this calculation unit calculates the distance between the eccentric shafts 2 and 2a based on the pulse signal from the linear gauge, and the value is input in advance. A required distance between the surfaces of the rollers is calculated by subtracting the diameters of the rollers 4 and 4a. The display section 14b digitally displays the distance between the surfaces of the rollers calculated by the calculation section 14a.

Next, we will explain how to use it.

First, the eccentric shafts 2 and 2a are set as the origin of the distance between the surfaces of the rollers, and the distance between the surfaces of the rollers is initially input into the calculation unit 14a using a digital switch (not shown). (not shown) is input to the calculation unit to perform initial settings. After initial setting, the worm gears 8 and 8a are rotated by the worm gear shaft 7 to rotate the rollers 4 and 8a.
Adjust the distance between the surfaces of 4a. During adjustment, the measuring shaft portion 9,
9a moves in the circumferential direction, the distance between both measuring shafts changes, and the gauge pin 132 of the linear gauge 13
moves forward and backward, which causes the entire gauge to expand and contract.
Through this expansion and contraction, a pulse signal corresponding to the amount of displacement is sent from the linear gauge to the measuring section 14, and is calculated by the calculating section 14a, and the distance between the surfaces of the rollers is displayed on the display section 14b.

Make optimal roller face-to-face adjustments based on the displayed values.

Other examples are shown in FIGS. 5-7. In this example, the worm gear shaft 7 is automatically adjusted by interlocking the automatic rotation drive means. That is, as shown in FIGS. 5 and 6, a fine adjustment gear 16 is provided in the middle of the worm gear shaft 7, and a fine adjustment pinion 18 attached to a pinion shaft 17 meshes with this fine adjustment gear. The pinion shaft 17 is supported by a bearing 19, and its rear end side is interlocked with a motor 20, which is automatic rotation driving means. Therefore, when the motor is driven, the rotational force is transmitted from the fine adjustment pinion 18 to the worm gears 8, 8a and the worm wheels 5, 5 via the fine adjustment gear 16 and the worm gear shaft 7, and the roller surface is adjusted.

The motor 20 is connected to the measuring section 14 and the wiring 15a (Fig. 7)
electrically connected by. The measurement unit 14 is
In addition to the calculation section 14a that measures the distance between roller surfaces, there is also a calculation section 14c that compares and calculates the measured distance between surfaces and a roller movement target value, and when the comparison values match, a motor stop signal is sent to the motor. 20
The signal generator 14d is provided with a signal generating section 14d that sends a signal to.

To explain the automatic adjustment, a target value of movement between the surfaces of the roller is input into the measurement unit 14 in advance. When the motor 20 is started, the distance between the surfaces of the rollers is moved, and the calculation section 14a of the measurement section measures the current value of the distance between the surfaces, and the calculation section 14c compares the current value with the input target value. When the compared current value and target value match, the drive of the motor 20 is stopped by a command from the signal generator 14d. This results in automatic adjustment of the desired roller surfaces.

If they do not match, depending on the value, for example, if the current value < the target value, the motor 20 is rotated in the reverse direction, and if the current value > the target value, the motor is rotated in the forward direction, and the current value and the target value are compared. The operation is repeated, and when a match is reached, the motor 20 stops.

(Effects of the Invention) According to the present invention, the amount of change in the distance between the pair of measurement shafts provided concentrically with the pair of eccentric shafts rotatably supporting the rollers is The distance between the surfaces of the rollers is detected by a center-to-center detection unit provided between the parts, and is calculated by a calculation unit based on an electrical signal representing the amount of change output from the detection unit, and is displayed on a display unit. When the worm gear shaft is rotated, this rotation is transmitted to a pair of worm wheels via a pair of worm gears, and each measurement shaft is concentric with each eccentric shaft, that is, eccentric with respect to each support shaft. The measuring shaft portion moves in the circumferential direction to change the distance between both measuring shaft portions, thereby adjusting the distance between both eccentric shafts, that is, the distance between the surfaces of both rollers. Therefore, the distance between the surfaces of the rollers can be displayed and adjusted accurately and with a simple structure. As a result, even during rolling, it is possible to accurately set the distance between the roller surfaces to the desired value while looking at the display on the calculation section, improving product accuracy while maintaining factory operating efficiency. In addition, the distance between the surfaces of the rollers can be easily and accurately adjusted without requiring any skill.

Furthermore, since the surface-to-surface adjustment of the rollers can be automatically performed without human intervention, the adjustment work becomes even easier.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional plan view, Fig. 2 is a partially cutaway side view, Fig. 3 is a sectional view showing the mounting state of the measurement detection unit, and Fig. 4 is a block diagram of the measurement detection unit and measurement unit. Figure 5 is a front view showing the motor and fine adjustment mechanism, Figure 6 is a plan view showing the motor and fine adjustment mechanism,
FIG. 7 is a block diagram showing the relationship among the measurement detecting section, the measuring section, and the motor. 2, 2a... Eccentric shaft, 3, 3a... Support shaft portion, 4,
4a...roller, 5, 5a...worm wheel, 7
...Wormshaft, 8...Wormgear, 9,9
a...Measurement shaft part, 13...Measurement detection part, 14...Measurement part, 14a...Calculation part, 14b...Display part, 14c
...Calculating section, 14d... Signal generating section, 20... Automatic rotation drive means.

Claims (1)

[Scope of Claims] 1. A pair of eccentric shafts rotatably supported by the case body and rotatably supporting a pair of rollers with opposing roller surfaces; A worm gear comprising: a pair of support shaft portions provided integrally with an eccentric shaft; a pair of worm wheels provided integrally with each of the support shaft portions; and a pair of worm gears having opposite threads that mesh with each of the worm wheels. a shaft; a pair of measurement shafts provided concentrically with each of the eccentric shafts and integrally with each of the worm wheels; and a pair of measurement shafts provided between the two measurement shafts, the amount of change in distance between the two shafts; a center-to-center detection unit that detects the amount of change and outputs an electrical signal representing the amount of change; a calculation unit that calculates the distance between the surfaces of the rollers based on the electrical signal from the center-to-center detection unit; and a display section for displaying the distance between surfaces of rollers in a rolling mill. 2. The automatic rotation drive means that applies rotational force to the worm gear shaft compares the calculated value of the distance between surfaces calculated by the calculation section with a pre-stored target value of the distance between the roller surfaces, and 2. The apparatus according to claim 1, further comprising comparison means for outputting a stop signal to said automatic rotation drive means when the values match.