JPS6254563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guidance device having a cooling function for controlling the temperature of a rolled material during rolling of steel materials.

Conventionally, as a cooling device for controlling the temperature of rolled material during hot rolling, for example, the
Various types are known, such as No. 15450 or Special Publication No. 56-37001.

In particular, in this type of cooling device that has an annular cylindrical gap (ring slit), the volume of the gap is fixed, so the flow rate must be adjusted only by adjusting the pressure of the cooling fluid. Shim adjustment, screw rotation adjustment, etc. can be used as a means to vary the gap formation volume, or to adjust the balance between pressure and flow rate, or to adjust the balance between pressure and flow rate, or to vary the gap formation volume. Variable fixing mechanisms such as cam adjustment (loosen the fixing, make variable adjustments, and then fix again) are used, but these operations often have the inconvenience of requiring repeated readjustments while interrupting the rolling operation. In addition, there were other drawbacks such as poor adjustment accuracy and, ultimately, poor cooling flow rate control accuracy.

The present invention makes it possible to accurately control the temperature in the rolling line by quickly changing the coolant flow rate in accordance with the temperature of the rolled material, and to control the temperature of the rolled material after rolling. In addition to being able to be adjusted arbitrarily, in continuous rolling performed with multiple rolling mills, by providing it in the middle of rolling,
Controlled rolling, in which rolling is performed while controlling the temperature of the rolled material, is also possible. Also,
By controlling the coolant flow rate with high precision and quickly, it is possible to cope with intermittent temperature imbalances in the longitudinal direction of the rolled material, and to perform temperature-equalized rolling over the entire length of the rolled material, resulting in perfect roundness of the finished product. Improvements in accuracy, yield, and quality are achieved.

Next, the configuration of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing the structure of the present invention, in which 1 is a guide box that houses a rolling material guiding device;
2 is a tubular sleeve (hollow shaft) installed in the guide box 1, 3 is a receiving guide (fixed guide), 4 is a cone guide (movable guide), and 5 is a drive mechanism for moving the cone guide 4. FIG. 2 is a sectional view taken along the line AA in FIG. 1. That is, a tubular sleeve (hollow shaft) 2 is inserted into the center of the guide box 1 close to the rolling roll 111, and the tubular sleeve (hollow shaft) 2 is inserted into the center of the guide box 1.
A receiving guide (fixed guide) 3 and a cone guide (movable guide) 4 are fixed in the center of the tubular sleeve (hollow shaft) 2 with their axes facing in series. It is installed in a triple-axis configuration. Therefore, this triple configuration has a fluid-filled chamber 11 (No. 1 jacket) on the inner surface of the guide box 1 and a fluid pressure equalization chamber 21 (No. 2 jacket) on the inner surface of the tubular sleeve (hollow shaft) 2.
A double flow chamber is formed in which the cooling fluid supplied from the fluid inlet 13 at the upper part of the guide box 1 maintains the full pressure and maintains an equal pressure and distributes the cooling fluid, thereby creating an even annular umbrella for the rolled strip. The structure is such that a shaped fluid jetting layer is obtained. One rear end of the receiving guide (fixed guide) 3 is provided so as to be inscribed in the caliber immediately after the exit of the rolling roll, and has an introduction tip structure for receiving the extended rolled strip while preventing misrolling such as popping out. The other end (front end, that is, the exit side in the forward direction of the rolled material) is formed into an annular conical inner surface, and has a slit forming portion 31 for forming a slit t through which coolant fluid is jetted. This guide has a tubular sleeve (hollow shaft 2 and set screw 1
It is fixed immovably at 5. The cone guide (movable guide) 4 has a slit forming part 41 formed in the shape of a truncated conical outer surface at the rear end (receiving side of the rolled material), and the receiving guide (fixed guide) 3
and the pass line PL are arranged in series on the same axis. The cone guide 4 is mounted within the tubular sleeve 2 so as to be movable in the axial direction. Therefore, by bringing the facing slit forming portions 31 and 41 of both the receiving guide 3 and the cone guide 4 close to each other, an annular conical gap portion, that is, a slit t is formed, and constitutes a coolant fluid injection port for the rolled material. It turns out.

Next, the drive mechanism 5 for moving the cone guide 4 will be described. FIGS. 1 and 2 show an example of this. First, both cone guides (movable guides) 4 inserted into a tubular sleeve (hollow shaft) 2 are rotated in the rotational direction using an implant key 8. are fixed and can only be moved in the axial direction. A threaded portion 22 is provided on the outer periphery of one end of the tubular sleeve (hollow shaft) 2 on the exit side of the strip, and a threaded gear pinion 6 and a threaded gear wheel 7 with a large reduction ratio are provided.
Of the set, the screw gear wheel 7 is screwed onto the threaded part 22, and the screw gear pinion 6 meshing therewith is rotatably supported by a pinion shaft 61 on a pinion bracket 12 made integrally with the guide box 1. The relationship between the threaded portion 22 and the threaded gear wheel 7 allows only driving from the threaded gear wheel 7, and reverse rotation due to external force from the guide side is prevented. A shift ring 1 integrated with a shift desk 101 is provided at the end of the cone guide (movable guide) 4 on the strip exit side.
0 is integrally attached with bolts 91, and the shift desk 101 on the outer periphery is connected to the screw gear wheel 7.
The shifter 9 is fixed with a bolt 92 to a degree of fitting that does not interfere with the rotation and sliding of the screw gear wheel 7 by sandwiching the side surface of the screw gear wheel 7 with the inner surface of the shifter 9.
are integrally and rotatably connected.

In the drive mechanism configured in this manner, when the pinion shaft 61 is rotated by an appropriate external force and the screw gear pinion 6 is rotated to either the left or right, the meshing screw gear wheel 7 moves around the screw portion 22. Rotate at a reduced speed. At this time, since the tubular sleeve (hollow shaft) 2 is fixed and immovable, only the threaded gear wheel 7 and the threaded portion 22
The cone guide (movable guide) 4 integrally connected to the shift desk 101 clamped by the shifter 9 moves only back and forth in the axial direction via the linear guide of the implanted key 8. will be held. With such a drive mechanism, the position can be stably set without changing the position due to external force from the guide side. In this way, the width or volume of the annular valve seat-shaped annular cone gap (ring cone slit) t formed by the receiving guide (fixed guide) 3 and cone guide (movable guide) 4 facing each other can be adjusted steplessly. Therefore, the minute flow rate of the cooling fluid passing through the annular conical valve seat can be precisely controlled as desired with a single touch operation.

Next, another example in which the configuration of the drive mechanism is different will be described.
FIG. 3 is a cross-sectional view showing another configuration example of the present invention, and FIG. 4 is a cross-sectional view taken along the line B--B in FIG.

The basic functions of the receiving guide 3 and the cone guide 4 are the same as in the example shown in FIG. The same symbols represent the same functions. A lock key sliding groove 52 is provided above the front inner surface of the hollow shaft 2 in the longitudinal direction of the shaft. A lock key 51 having lock teeth 55 in the longitudinal direction of the shaft is fitted and fixed on the upper outer periphery of the front part of the movable guide 4, and the lock key 51 is fitted onto the hollow shaft 2 for double shaft mounting. The movable guide 4 is fixed in rotation in the circumferential direction by a lock key 51 and restricted in its movement so as to be slidable only in the axial direction. A set of screw gear reduction mechanisms are mounted on the front upper part of the hollow shaft 2,
It meshes with the lock key 51 to transmit the reciprocating motion of the movable guide 4.

The screw gear reduction mechanism includes a screw gear pinion 6 and a gear wheel 53 whose shaft angles are set at right angles, and a pinion shaft 61 and a wheel shaft 71, respectively.
It is mounted and stored in the gear casing 71', and has the functions of fine deceleration adjustment and reverse rotation prevention. Rack key sliding groove 52 of hollow shaft 2
A cutout hole 56 is provided above, through which the outer periphery of the mounted screw gear wheel 7 is inserted in a half-moon shape, and meshes with the rack teeth 55 of the lock key 51, so that the gear reduction rack slides in the longitudinal direction of the axis of the movable guide 4. Configure the movement mechanism. Bearing groove 10 on the lower part of the inner surface of the hollow shaft 2
4' is provided to house the flat cage roller bearing 104 and movably abut the lower part of the movable guide 4. When the screw gear reduction mechanism is activated, the screw gear wheel 53 and the lock key 51
This function is to reduce sliding friction by receiving the downward deflection load at the time of meshing and sliding on the roller bearing 104. A sealing cover 103 is attached to the circumference of the front end face of the hollow shaft 2 in order to maintain the functions of the sliding portion of the slide key 52 and the bearing groove 114' for a long period of time. Furthermore, the sealing effect of the internal O-ring 105 and the sealing O-ring 106 on the other side fitted circumferential portion prevents scale and cooling fluid from entering from the outside. The fixed guide 3 is provided with a slit forming part 31 at its front end, and the movable guide 4 is provided with a slit forming part 41 at its front end. Although the drive mechanism illustrated in FIG. 3 is different from the drive mechanisms illustrated in FIGS. 1 and 2, the functions of ejecting and regulating the amount of coolant fluid are identical. The same purpose is achieved except that the direction of injection of the coolant fluid and the operating speed of the cone guide (movable guide) 4 are different. The adjustment of the slit t is performed by rotating the pinion shaft 61 using an appropriate external force. That is, when the screw gear pinion 6 is rotated, the gear wheel 53 is rotated, and the rotational force is applied to the lock key 5.
1, and the cone guide 4 formed integrally with the lock key moves in the same direction as the pass line (PL). In this case, the amount of movement is the amount of tooth feeding by the screw gear pinion, which directly becomes the amount of movement of the cone guide 4, so the movement of the cone guide is extremely rapid.

As described above, by moving the cone guide (movable guide) 4, the receiving guide (fixed guide)
An annular cylindrical gap, ie, a slit t, is formed by the slit forming portions 31 and 41 provided between the opposing portions of the slit 3, and the degree or width of the gap can be set as desired. The aforementioned drive mechanism (Fig. 1,
When comparing the movement performance, that is, the operating speed, of the cone guide (movable guide) 4 by the drive mechanism (illustrated in FIG. 3) and the above-mentioned drive mechanism (illustrated in FIG. 3), the latter mechanism (illustrated in FIG. 3) is easy to operate quickly with one touch. It features rapid movement performance. In either case of the above two mechanisms, the adjustment of the slit width t and the setting control operation of the cooling fluid are possible at any time, and the setting value and status are as follows.
It is possible to maintain a constant slit width t and perform stable flow rate control without any fluctuation due to other external forces such as the jetting pressure of the cooling fluid or the frictional force of the passing rolling material.

Since the present invention is configured as described above, the cooling fluid supplied from the cooling fluid inlet 13 at the upper part of the guide box 1 first fills the fluid-filled chamber 11 and maintains a high pressure, and then the cooling fluid flows through the tubular sleeve. The fluid flows into the next fluid pressure equalization chamber 21 from the flow path 14 (small holes provided at several locations around the circumference) provided in the (hollow shaft) 2 and is filled with equal pressure. Cooling water forming an annular uniform jet stream is intensively jetted toward the center of the pass line from preset slits. If the rolled material passes through the center of these guides, it will be cooled at a cooling degree that depends on the injected cooling water. A large number of this device can be installed in a rolling line. Also, if you try to adjust the temperature of the rolled material,
The cone guide is moved by the above operation to adjust the slit width and control the amount of cooling water jetted out.

According to the present invention, this control can be performed extremely easily, with good accuracy, and without interrupting rolling. Furthermore, since the slit t can be closed off, the range of cooling control of the rolled material is extremely wide. This shows that it is possible to efficiently perform controlled rolling by uniformizing the temperature of the rolled material and appropriate cooling, or low-temperature rolling to improve the structure, and is extremely useful industrially. 6 in the diagram
1' is a one-touch ratchet handle, 62 is a spring pin, 111 is a rolling roll, 112 is a rolled strip, t is an annular cylindrical gap (ring slit),
l is the conical surface facing distance, P is the annular umbrella-shaped jet concentration point,
Q represents the apex angle of the annular cone.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view showing the configuration of the present invention, and FIG.
3 is a cross-sectional view showing another example of the structure of the present invention, and FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3. 3... Receiving guide, 4... Cone guide, 5... Drive mechanism, 31, 41... Slit forming section.

Claims (1)

[Claims] 1. A receiving guide having a slit forming part at the front end and guiding the rolled material, a cone guide arranged in series with the receiving guide and movable on the same axis and having a slit forming part at the rear end, and the cone guide. It is comprised of a drive mechanism that has an anti-reverse function that can be moved and set at any position by an external force, and the slit forming part of the receiving guide and the slit forming part of the cone guide are disposed opposite to each other to spray coolant fluid onto the rolled material. 1. A cooling guiding and guiding device, characterized in that the cooling guiding device is configured to form a slit that causes the rolling material to move, and to arbitrarily adjust the width of the slit using the drive mechanism to control the amount of coolant fluid injected into the rolled material.