JPH0331444Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a skin pass device for improving the roundness of rods and wires. Regarding equipment.

(Prior art) Conventionally, in order to prevent the occurrence of bite in the rolled material rolled by the final finishing rolling stand, a relief is provided in the shoulder portion of the rolling roll hole, but this relief prevents the material from being rolled. Since minute protrusions were occurring in the rolled material and reducing the roundness accuracy of the finished product, these minute protrusions were lightly rolled using a skin pass device placed at the exit of the finishing rolling stand to improve the roundness accuracy. It is well known that there are

Recently, in order to omit the secondary processing process such as drawing of rod and wire rod products and use them as they are, there has been a demand for finished products with high roundness and finishing accuracy, for example, for wire rod products. The finish rolling accuracy is as high as 1/10 mm or less, and in order to skin-pass the minute protrusions that occur due to the relief of the shoulders of the holes in the roll rolls and meet the required roundness accuracy, the roller pairs must be adjusted. If misalignment occurs in the thrust direction,
It is required to be able to adjust this deviation, in other words, it is required that the hole shapes of the pair of rollers be able to be precisely aligned. The reason is that if the vertical alignment of the pair of rollers is not completely adjusted,
Not only is it impossible to perform a high-precision skin pass, but the rolled material may hit the flange of the roller, misalignment of the product may occur, reducing product accuracy, or the rolled material may hit the flange of the roller, resulting in misrolls. This is because it causes the occurrence of These vertical misalignments of the rollers occur due to machining errors when drilling holes in the rollers, and tolerances specific to built-in parts such as bearings during device assembly, and the total tolerance does not meet the required finishing accuracy. Since the misalignment of the rollers often exceeds the centering position, there has been a demand for an apparatus that can easily finely adjust the vertical misalignment of the pair of rollers.

In order to solve the above-mentioned problems, the present applicant installed a worm wheel as a roller vertical movement adjustment device on a female thread formed on the upper part of the roller support shaft that rotatably supports the skin pass roller integrally with a bearing etc. By screwing together the male screw provided on the shaft of the worm wheel, and rotating the worm gear that meshes with the worm wheel, the roller support shaft is moved up and down according to the direction of rotation, and the vertical displacement of the roller is finely adjusted. We proposed a method (Utility Model Application No. 143702, 1983) that adjusts and aligns the roller hole shape.

(Problem to be solved by the invention) According to this conventional example, since the threading between the female thread of the roller support shaft and the male thread of the worm wheel is not released, it is difficult to adjust the center distance of the roller after the vertical adjustment of the roller is completed. During the center-to-center adjustment work, the roller support shaft rotates in accordance with the rotating direction of the worm gear for center-to-center adjustment, and the roller support shaft is moved in the vertical direction by the male screw that engages with the female screw at the top of the roller support shaft. A deviation is caused in the vertical alignment of the rollers that has been set in advance. For this reason, vertical adjustment of the roller must be performed after adjusting the roller center distance.For example, after installing an adjustment device on the rolling line, the finished dimensions of the product are measured and the skin pass amount is adjusted using feedback data. Therefore, when adjusting the center distance of the roller, it is necessary to first loosen the lock nut of the vertical adjustment device to make it free, perform the center distance adjustment, and then adjust the roller vertically again. As described above, although fine adjustment is easily possible in the conventional example, vertical adjustment is constrained by center-to-center adjustment, and there is room for improvement in improving the efficiency of adjustment.

The purpose of this invention is to enable the vertical adjustment of the roller and the center-to-center adjustment to be performed independently, without linking them as in the past. The aim is to improve the efficiency of

(Means for Solving the Problems) In the present invention, a roller pin 2 integrated with an eccentric shaft 21 is vertically movable and rotatably installed in a guide box 1, and a roller 3 is attached to the roller pin by a bearing or the like. It is rotatably supported along with the
A nut 7 is connected to the upper part of the roller pin so as to be movable in the vertical direction but not rotatable. The roller pin can be pushed up or down in the vertical direction,
A shaft portion 81 of the screw wheel 8 is screwed into the nut. The roller pin 2 and the screw wheel 8 are rotated about their axes by the operation of the rotation means 4, 9, 22, and 82.

(Function) Since the nut 7 and the roller pin 2 are connected without interlocking, the vertical movement of the roller pin that adjusts the roller 3 up and down and the rotational movement of the roller pin that adjusts the distance between the roller cores are separated from each other. Therefore, vertical adjustment and center-to-center adjustment can be performed independently at any time. In other words, the vertical adjustment is
By rotating the pinion 9, which is a rotating means, the screw wheel 8 rotates in accordance with the rotation direction.
This is done by pushing and pulling the nut 7 screwed into the roller pin 2 up and down through the adjusting section 71.

The center-to-center adjustment is performed by rotating the pinion 4 of the rotating means in accordance with the rotating direction, but this rotational force is not transmitted to the screw wheel 8, but only to the roller pin 2, and the eccentric position is adjusted. Roller 3
The cores of the two cores are aligned.

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

1 to 3, a roller pin 2 integral with an eccentric shaft 21 is vertically slidably and rotatably provided on a guide box 1. The roller pin rotatably supports the roller 3 together with a bearing at the position of its eccentric shaft 21. A gear part 22 having teeth on the outer periphery is formed at the upper end of the roller pin 2, and a center pinion 4 meshes with this gear part. This pinion meshes with a side pinion 51 provided on the shaft 5. This center pinion and the gear portion 22 of the roller pin constitute a rotating means for the roller pin. Further, a female thread 23 is provided on the inner periphery of the shaft core hole of the gear portion 22. In this shaft core hole, as shown in FIGS. 1 and 4, the male thread of the bush 6 is screwed together with the female thread, and the flange 61 at the upper end of the bush is fixedly attached to the gear portion 22 with a set screw 62. A nut 7 is loosely fitted into the inner cylinder of this bush, so that the bush can always rotate relative to the nut. A flange-like adjustment part 71 is integrally provided at the lower end of the nut 7, and the upper surface of this adjustment part makes contact with the lower surface of the bush 6 so that the bush can be pushed up. In contact with the bottom surface 24, the roller pin 2 can be pushed down. The nut 7 is provided on the gear cover 11 and is prevented from rotating by cutout surfaces 72 on both sides of the outer periphery of a plate-shaped projection 12 that hangs downward.

As shown in FIG. 1, a shaft 81 of a screw wheel 8 is rotatably supported on a gear cover 11 provided on the guide box 1, and the lower end of this shaft extends downward. The screw part is nut 7
It is threaded with the internal thread of. The gear part 82 at the upper end of this screw wheel meshes with the pinion 9,
This pinion and the gear portion 82 constitute a rotating means for the screw wheel.

Next, the vertical adjustment of the roller will be explained. The screw wheel 8 has a shaft portion 81 with a nut 7 at the lower end.
When the pinion 9 is rotated, the gear portion 82 and the screw wheel 8 are rotated in accordance with the direction of rotation, and this rotation causes the nut, which cannot rotate, to move upward. or move downwards;
The bush 6 fitted into the nut by the adjustment part 71
is lifted or the bottom surface 24 is pushed down, thereby pushing and pulling the roller pin 2 up and down. As a result, the position of one or both of the rollers 3 is adjusted up and down to align the roller holes.

To explain the adjustment between roller cores, by rotating the side pinion 51, the center pinion 4 rotates according to the rotation direction, rotates the gear portion 22 of the roller pin 2, and adjusts the center pinion 4 to the eccentric shaft portion of the roller pin. The distance between the centers of the installed roller pair is adjusted. Roller pin 2 for center-to-center adjustment
The rotational force is not transmitted from the bush 6 to the nut 7 loosely fitted therein, but is absorbed by the fitting sliding part.
Since no actuation force is transmitted to the shaft portion 81 of the screw wheel, the center-to-center adjustment of the rollers is performed independently without being related to the vertical adjustment.

As another example, as shown in FIG.
The bush 6a may be fixed to the top surface of the holder with a set screw 62a. In this example as well, even if the bush 6a rotates together with the gear portion 22 of the roller pin, it is natural that the rotational force is not transmitted to the nut 7.

In each of the above examples, the nut 7 was connected to the gear portion 22 of the roller pin 2 via the bushes 6 and 6a, but the lower end of the nut 7 was connected directly to the gear portion 22 of the roller pin 2 as shown in FIG. It may also be configured to be housed within the section 22. In this case, the gear portion 22 is constructed from a member independent of the roller pin 2, and this gear portion is fixed to the roller pin with a set screw 62b.

(Effects of the invention) According to the invention, when finely adjusting the finished external shape of a rolled material during rolling, there is no need to perform vertical adjustment again after adjusting the center distance as in the conventional method.
Work is more efficient, and when rolling rolled materials that do not require a skin pass, the distance between the roller cores is widened and retracted, and when rolling materials that require a skin pass, the distance between the roller cores is increased. In the case of setting the material to a predetermined dimension and rolling, if the vertical adjustment is performed in advance, only the center-to-center dimension adjustment is necessary, which improves work efficiency compared to the conventional example.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view, Fig. 2 is a front view of the skin pass device, Fig. 3 is a plan view of Fig. 2, Fig. 4 is a plan sectional view showing the nut installed state, and Fig. 5 is another embodiment. Partially sectional enlarged front view showing the main part of the example, No. 6
The figure is an enlarged partially sectional front view showing the main parts of still another embodiment. 1...Guide box, 2...Roller pin, 2
1... Eccentric shaft, 3... Roller, 4, 9, 22, 8
2... Rotating means (pinion, gear part), 7... Nut, 71... Adjustment part, 8... Screw wheel, 81... Shaft part.

Claims (1)

[Scope of Claim for Utility Model Registration] A roller pin that is integrated with an eccentric shaft that rotatably holds a roller and is vertically slidable and rotatably installed in a guide box; A nut that is non-rotatably but slidably connected in the vertical direction and has an adjustment part for pushing up and down the roller pin in the vertical direction, and a screw whose shaft part is screwed into this nut. A roller vertical movement fine adjustment device for a skin pass device comprising a wheel.