JPS628882Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a continuous rolling machine that rolls long steel bars, strips, wires, etc. in a horizontal rolling mill. The present invention relates to an improvement of a device for adjusting the degree of engagement of a pair of left and right guide rollers that guide a long steel bar, and more specifically, the present invention relates to the improvement of a device that adjusts the degree of engagement of a pair of left and right guide rollers that guide a long steel bar. The spacing between the pair of guide rollers can be adjusted extremely precisely by making minute movements in left and right distribution around the pass line, and the adjustment settings are set so that the guided bar and guide roller come into contact with each other with the best degree of engagement. The present invention relates to a mechanism for finely adjusting the degree of conjugation of a roller guide.

In the above-mentioned continuous rolling equipment, the rolled steel strip (hereinafter referred to as "rolled steel") extended from the rear rolling roll is first received in the exit-side guide device and given a predetermined twist angle, and then rotated in the forward direction. This is taken over by an inlet guide device (to which the present invention belongs) disposed on the inlet side of the next rolling mill. The entrance side guide device (roller guide) supports a pair of left and right guide rollers in close proximity to the rolled steel biting openings of the upper and lower rolls in the forward direction, and guides the rolled steel advancing towards the rolling rolls. The rolled steel is joined from both sides and guided so that the center line of the joined rolled steel precisely coincides with the center line of the caliber groove of the rolling roll. In this case, if the binding force of both guide rollers to the rolled steel is too strong, unreasonable resistance will be applied to the rolled steel, damaging the rolled steel or causing trouble to the guide device, while the binding force will be too weak. If it is too long, the rolled steel will not be guided correctly, resulting in a decrease in rolling accuracy and a defective product. For this reason, it is extremely important to move the supporting positions of the pair of left and right guide rollers in left and right directions around the pass line, and to appropriately adjust and set the distance between the two rollers.

Utility Model Application No. 52-100888 (Utility Model Application No. 54-29132; Utility Model Application No. 57)
-24406). This type of roller guide pivots the middle part of a pair of left and right roller holders, which are installed almost in parallel, so that they can pivot in the horizontal direction, using left and right fulcrum pins provided on both sides of the guide box.
The pair of left and right guide rollers is supported at each tip of both roller holders, and an adjustment mechanism is provided at the rear end of the roller holder to widen or narrow the gap between them. In this method, a female threaded cylinder having an axis perpendicular to the pass line is horizontally supported between the rear ends of the roller holders on both sides by the bearing part of the guide box, and the central part of the female threaded cylinder is used as a boundary to face both ends. The threaded part of the threaded spindle having the left-hand female threaded part and the threaded part of the threaded spindle having the right-hand female threaded part are respectively screwed into the female threaded part of the left-hand thread and the female threaded part of the right-hand thread that have been provided to hold the rotation around the axis. The roller holder is bundled and the rear end of the roller holder is pressed against the tip of a double-threaded spindle. When the female threaded tube is rotated in the spindle advancing direction, the threaded spindles on both sides advance equally outwardly, pushing the distance between the rear ends of both roller holders wider and narrowing the distance between both guide rollers.
When the female threaded tube is rotated in the opposite direction, both threaded spindles move back towards the center of the female threaded tube, widening the gap between the two guide rollers. The rear end portions of the roller holders on both sides are pressed into contact with the tips of the threaded spindles on both sides via push bolts by a tension spring spread between the extension portions.

The above-mentioned advanced guide roller coupling degree fine adjustment mechanism is provided with a ratchet wheel that rotates integrally with the female screw cylinder in the center thereof, and by swinging one ratchet handle, the action of the pair of ratchet mechanisms can be adjusted. In this case, the female threaded cylinder is rotated in the advancing direction or the retreating direction of the spindle.
With the advent of this device, the degree of engagement of the guide roller can be adjusted with a one-touch operation, simplifying the operation, and by minutely moving the tip of the relatively long handle, the female threaded cylinder can be adjusted to a considerable extent. It is now possible to finely adjust the rotation.

However, when the adjustment mechanism is adjusted by operating the handle, the manual operation is transmitted to the female threaded cylinder in a one-to-one ratio, so there is a limit to the accuracy of the adjustment. Furthermore, steering wheel operation was left solely to the operator's intuition. On the other hand, even higher precision is often required in adjusting the degree of conjugation of the guide rollers, and as the running speed of rolled steel increases, this tendency becomes more and more important, and in the high-speed precision rolling of wire rods. The distance between the mating surfaces of the guide rollers is 1/10.
It became necessary to make adjustments and settings with precision within millimeters, and there was a strong demand for improvements to conventional equipment.

The basic purpose of this invention is to provide an adjustment mechanism that can finely adjust and set the degree of engagement of a pair of left and right guide rollers with extremely high precision. .

More specifically, the female threaded tube that adjusts the distance between the rear ends of the pair of left and right roller holders is finely rotated at a large reduction ratio by manually rotating an adjustment shaft for adjusting the degree of engagement of the guide rollers. The object of the present invention is to provide a mechanism for finely adjusting the degree of conjugation.

Another purpose of the present invention is that the adjustment amount of the adjustment axis is displayed by a gauge, so that pre-planned fine adjustments can be made with extremely accurate adjustment settings, unlike the adjustment that relies on intuition with conventional equipment. Provides an adjustment mechanism that allows

Still another object of the present invention is to provide a conjugation degree fine adjustment mechanism with good workability that allows reliable adjustment even when the roller guide is in operation.

The adjustment mechanism of the present invention to achieve the above purpose is as follows:
It is configured as described below.

The conjugation degree fine adjustment mechanism of the present invention also has a female threaded cylinder having a horizontal axis perpendicular to the pass line between the rear ends of the roller holders on both sides, and by rotating this female threaded cylinder in one direction or the other direction. The spindle is moved back and forth, and in the present invention, a threaded gear part that rotates integrally with the female threaded cylinder is provided in the center part of the female threaded cylinder.
A screw pinion supported by a guide box is engaged with this screw gear, and one end of the pinion shaft, which rotates integrally with the screw pinion, is directed toward a location where it can be easily operated from outside the machine. Make it stand out. A square shaft portion for use with rotating tools is provided at the externally projecting end of the pinion shaft. The meshing part between the threaded gear provided in the female threaded cylinder and the threaded gear type pinion is hermetically surrounded by an appropriate gear casing.
It is best to prevent foreign matter from entering from the outside.

With the above configuration, when the pinion shaft is rotated, for example, in the advancing direction of the threaded spindles on both sides, this rotation causes a small angle rotation of the female threaded tube that rotates integrally with the threaded gear according to the advancing angle of the threaded teeth of the pinion. let As described above, the threaded spindle advances due to the rotation of the female threaded tube and narrows the distance between the pair of guide rollers, but the amount of adjustment is extremely small.

Furthermore, in the above configuration, the amount by which the distance between the pair of guide rollers is adjusted by one rotation of the pinion shaft is clear from calculation. Therefore, if a scale plate is attached to an easily visible position on the pinion shaft, and a scale is divided into 10 equal parts, for example, it will be possible to measure numerically how much the distance between the two guide rollers (degree of engagement) has been changed and adjusted by rotating the pinion shaft. This makes it possible to confirm the situation.

Other objects of the present invention described above and detailed configurations of the apparatus of the present invention will be explained in the following description of specific examples.

1 and 2 are a side view and a plan view showing a specific example of a rolling mill inlet guide device (roller guide) equipped with the conjugation degree fine adjustment mechanism of the present invention, and are generally designated by the reference numeral 1. The guide box has fulcrum pins 10a and 10b on both sides of the front part of the main body.
The intermediate portions of the left and right roller holders 2a and 2b (the left side in the direction of progress of the pressed steel is defined as the left) are pivotally supported so as to be pivotable in the horizontal direction and are supported substantially parallel to each other. Both roller holders have vertical roller pins 2 at their front ends.
1 and 21, a pair of left and right guide rollers 3a and 3b
is supported horizontally. 22 indicates a bearing provided on each roller pin. The guide box 1 has a base 11 fixed on a rest bar 12 with a clamp 13, and the pair of guide rollers 3a and 3b are opposed to each other in close proximity to the rolled steel openings of the upper and lower rolling rolls _R1 and _R2 . It will be fixed like this. 14 is an entry guide.

A device for adjusting the degree of engagement between the pair of left and right guide rollers 3a and 3b is usually provided between the rear end portions 23, 23 of the left and right roller holders. Both roller holders 3a and 3b are formed in a left-right symmetrical shape, and the device for adjusting the degree of conjugation provided between them is also
It has a bilaterally symmetrical configuration.

At the top of the guide box 1, there is an upper plate 15 that presses the upper surface of the roller holder, and a pair of left and right rear brackets 16, 16 are integrally provided from both sides of the rear side of the upper plate 15, and a pair of left and right rear brackets 16, 16 are integrally provided to hold down the upper surface of the roller holder on both sides. The end portion 23 has a corresponding upwardly projecting portion 24 .

The conjugation degree fine adjustment mechanism provided in this part is mainly shown slightly enlarged in FIGS. 3 and 4, and is supported by the female threaded cylinder 4 between the rear brackets 16, 16 on both sides. The female threaded tube 4 has, for example, a right-handed female threaded portion 41 on the left side and a left-handed female threaded portion 42 on the right side from a central hollow portion 40 having a slightly large diameter toward both ends. The rear brackets 16, 16 on both sides have left and right spindle insertion holes 17, 17 having horizontal axes at right angles to the pass line XX (Fig. 2), and are slidably inserted into these in the axial direction. The right male threaded portion 5 of the left threaded spindle 5a and the right threaded spindle 5b, respectively.
1 and left male threaded portion 52 into the right-handed female threaded portion 41 and left-handed female threaded portion 4 of the female threaded tube 4, respectively, the female threaded tube 4 is attached to the rear brackets 1 on both sides integral with the guide box body 1.
It is supported between 6 and 16. Both ends of the female threaded cylinder 4 rotatably slide on opposing surfaces of the rear brackets on both sides, and displacement in the axial direction is accommodated. On the other hand, the threaded spindles 5a, 5b on both sides have outer ends 50, 5 facing the upwardly protruding parts 24 at the rear ends of the roller holders on both sides.
The key bolt screwed into the rear bracket 16 has a long key groove (Fig. 3a) parallel to the axis toward the bottom of the rear bracket in the position shown in FIG. 54
This prevents rotation around the axis.

Upper overhanging part 2 of the rear end of the roller holder on both sides
4 and 24 are provided with bolt holes 25 and 25 along an extension of the axis of the spindle insertion hole 17, and push bolts 6 on both sides are screwed into the bolt holes 25 and 25.
The tips 60, 60 of a, 6b are pressed against the outer ends 50, 50 of the threaded spindle by spring pressure, and constitute a point of force P. When the female threaded tube 4 rotates clockwise in FIG. 4, the threaded spindles 5a on both sides,
5b advance outward, and push the distance between the rear end portions 23, 23 of the roller holders on both sides via the push bolts 6a, 6b which contact each other at the force point P, thereby narrowing the distance between the pair of guide rollers 3a, 3a. Rotation in the opposite direction widens the distance between the guide rollers.

The configuration described above is basically the same as the configuration of Utility Model Application No. 100888/1988.

The fine adjustment mechanism of the present invention includes a threaded gear 43 provided on the outer periphery of the central part of the female threaded cylinder 4, and a threaded small gear (pinion) 7 meshed with this. The end portion protrudes obliquely upward at the rear of the guide box, which is convenient for operating from outside the machine.

A base end 81 of a bearing bracket 8 for supporting the pinion shaft 71 is fixed to the rear upper surface of the guide box 1 (upper plate 15) with a fixing bolt 82, and supports the pinion shaft 71 in the above-mentioned position. . Both ends of the large-diameter boss portion 70 of the pinion are tightly sandwiched between the upper and lower inner wall surfaces of the internal space 80 of the bearing bracket, and the pinion is supported so as not to be axially displaceable. The bearing bracket 8 has a cylindrical length portion 83, which is provided with a shaft-mounted portion on one side of the cylindrical portion covering the threaded gear 43 at the center of the female threaded cylinder, which engages with the right side portion of the female threaded cylinder in a double shaft manner as shown in FIG. By connecting a cover plate 84 which is fitted and mounted on the left side portion of the female threaded cylinder in a dual axis manner to the open end surface with a plurality of connecting bolts 85, 85,
It also serves as a gear box for sealing the meshing portion between the screw gear 43 and the pinion 7 from the outside world. Reference numeral 86 denotes an anti-friction sleeve made of oil-impregnated metal or the like provided on the shaft-mounted portion. The outer end of the pinion shaft 71 is
Projecting outward from the bearing bracket/gear box 8,
It has a square shaft portion 72 for use in rotating tools. Note that this pinion shaft is provided with a handle 73 for rotating the pinion shaft. When the pinion shaft is rotated in the direction of the arrow in FIG. 4, the internally threaded tube 4 rotates clockwise in this embodiment, and as described above, the force of engagement of the pair of guide rollers with respect to the pressed steel is adjusted to be stronger. The amount of adjustment is extremely fine because the female thread cylinder 4 is rotationally driven at a large reduction ratio of 1:n (if necessary, it can be set to 2:n), where the gear of the screw gear 43 is n. It is. Therefore, even when adjusting the degree of conjugation, which requires fine adjustment within 1/10 mm, the adjustment can be performed accurately.

74 is a scale plate provided to rotate together with the pinion shaft 71, and as shown in the front view of FIG. A double scale display 75 is provided. If the degree of conjugation is adjusted while visually comparing this scale with the fixed pointer 76, there is an advantage that the amount of adjustment can be confirmed numerically. As described above, the relationship between the scale interval and the amount of change in the interval between the pair of guide rollers can be calculated in advance.

By the way, the pair of guide rollers 3a, 3b faithfully follows the displacement of the threaded spindles 5a, 5b on both sides, which advance and retreat minutely due to the rotation of the pinion shaft.
In the roller holder for displacing
must be securely pressed against the Conventionally, as a means for bringing the two into pressure contact, it has been common to install a tension spring between the rear end extensions on both sides. However, in this embodiment, the tension spring is eliminated, and a hollow part 61 that opens outward is provided in the central part of the push bolt 6 (common to a and b), and a length that loosely passes through the through hole 62 at the tip of the push bolt 6 is provided. The threaded end of the bolt 63 is screwed into the threaded hole provided in the outer end 50 of the threaded spindle 5 (common to a and b), and the bottom surface of the hollow portion 61 (the tip 60 portion) and the long bolt 63 are connected. A spring 65 is compressed between the head 64 and the head 64. This structure allows the tip 60 of the push bolt and the outer end 5 of the threaded spindle to
0 and can be elastically pressed to form a reliable point of force P. Further, since the tension spring of the conventional device is not required, there is an effect that obstacles can be eliminated in the work of adjusting the engagement degree of the guide roller that operates the pinion shaft 71.

According to the conjugation degree adjustment mechanism of the present invention described above, the conjugation degree of the guide roller of the rolling mill inlet guide device can be finely adjusted with a precision of 1/100 mm, and the conjugation degree can be adjusted between the threaded gear type pinion and the female thread. Since this is set through the meshing of the threaded gear part of the cylinder, the required degree of conjugation can be accurately adjusted and set even during high-speed rolling of rolled steel, and even if some impact occurs during operation, the meshing will be maintained. This has the effect of ensuring that the desired degree of conjugation is maintained without shifting the positional relationship between the two, thereby making it possible to always produce a good product. Furthermore, the structure in which the scale plate is provided on the pinion shaft has the effect that a previously requested adjustment amount can be accurately adjusted, unlike the conventional adjustment that relies on the intuition of the operator.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a rolling mill inlet side guide device embodying this invention, FIG. 2 is a plan view of the same, partly in section, FIG. 3 is a section view of an embrace degree adjustment mechanism taken along line - in FIG. 1 and FIG. 4, FIG. 4 is a section view taken along line - passing through the side of the screw gear 43 of the female screw cylinder 4 in FIG. 3, and FIG.
1 is a cross-sectional view of the scale plate, and FIG. 6 is a front view of the scale plate portion. 1: guide box; 2a, 2b: roller holders (left, right); 3a, 3b: guide rollers (left,
Right), 4...female threaded cylinder, 43...screw gear, 5...screw spindle, 6...push bolt, 7...pinion, 8...bearing bracket and gear box.

Claims (1)

[Claims for Utility Model Registration] 1. An intermediate portion between a pair of roller holders 2a and 2b on both sides that support a pair of left and right guide rollers 3a and 3b at their front ends by a pair of fulcrum pins 10a and 10b provided on both sides of the guide box 1, respectively. left and right rear brackets 16, which are pivotally supported for horizontal rotation and provided at the rear end of the guide box;
16, a right-handed female threaded portion 41 and a left-handed female threaded portion 4 are inserted from the central hollow portion 40 toward both ends.
2 is inserted into the spindle insertion holes 17, 17 of the left and right rear brackets.
The right male threaded portion 51 of the threaded spindles 5a and 5b on both sides, which are slidably inserted in the axial direction, is screwed into the right female threaded portion 41, and the left male threaded portion 52 is screwed into the left female threaded portion 42, respectively. As a result, the female threaded cylinder 4 is supported between the rear brackets 16 on both sides so as not to be displaceable in the axial direction, and the tips of the push bolts 6a and 6b provided at the rear ends of the roller holders on both sides are connected to the left and right threaded spindles. In this device, a threaded gear 43 is provided on the outer periphery of the female thread cylinder 4, and a bearing bracket 8 having one end fixed to the rear end of the guide box is used. A pinion 7 in the form of a screw gear that is supported in an axially immovable manner is engaged with the screw gear 43, and the tip of a pinion shaft 71 that rotates integrally with the pinion is projected from outside the machine to a position where it can be easily operated. A scale plate 7 is placed on the pinion shaft 71 at a position that is visible from outside the machine.
4. A mechanism for finely adjusting the degree of coupling of guide rollers in a rolling mill inlet guide device. 2 Utility Model Registration Scope of Claim 1 In the apparatus of claim 1, the bearing bracket 8 is a shaft-mounted type bearing that is double-axis supported by cylindrical portions at both ends of a female threaded cylinder that substantially screws with the threaded spindle. 1. A mechanism for finely adjusting the degree of coupling of guide rollers in a rolling mill inlet guide device, characterized in that the mechanism is a bracket and is prevented from rotating by fixing one end to the rear end of the guide box. 3 Utility Model Registration In the device according to claim 2, the shaft-mounted bearing bracket 8 has a cylindrical portion 83 that covers the threaded gear 43 portion of the female threaded tube.
and a cover plate 84 with a connecting bolt 85 to form a gear box that seals the meshing portion between the screw gear 43 and the pinion 7. conjugation degree fine adjustment mechanism.