JPH0341850Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a sizing device for a strip material that prevents folding defects, wrinkle defects, etc. in a rolled material during the rolling process of the strip material.

(b) Prior art In the rough rolling process of a strip, a roller guide having multiple pairs of rollers is placed on the exit side of a rolling roll having a box-shaped hole, for example, to prevent corners and free surfaces of the rolled material. The free surface of the rolled material is widened by applying light reduction shaping to the concave portion from approximately the same direction as the rolling direction of the rolling roll, so that the free surface of the rolling material is rolled down into the groove of the next rolling roll without any gaps. There is a method (Japanese Unexamined Patent Publication No. 58-23505) which attempts to prevent wrinkle defects, fold-in defects, etc. caused by recesses in the free surface of corner portions of rolled material.

(c) Problems to be solved by the invention Conventionally, for example, in the rough rolling process of special steel, the reduction amount could not be increased due to the characteristics of the rolled material, resulting in insufficient width of the free surface.
A recess as shown in Fig. 4A occurs on the free surface,
If this concave portion is rolled down by the next rolling roll without being sized, the concave portion will be rolled in such a way as to be folded in as shown in Fig. 4B, resulting in fold-in defects, which will reduce the quality of the finished product. Ta.

According to the conventional example, when rolling a strip material, for example, when a rolled material having a box-shaped cross section is rolled by a rolling roll having an oval hole shape,
Although the effect of preventing the occurrence of fold-in defects and wrinkle defects is recognized, the sizing by the sizing roller is performed from the same direction as the rolling by the rolling roll, and the free surface is rolled down from above and below and indirectly width-aligned. Since the free surface was not rolled down directly, the width of the free surface was insufficient, and it was difficult to completely prevent fold-in defects.

From the above, the objectives of the present invention are as follows.

First, by directly sizing the free surface of the rolled material using a sizing roller instead of indirectly performing it in the rough rolling process, it is possible to prevent the occurrence of fold-in flaws, wrinkle flaws, etc.

Second, in order to make the rolled material accurately bite into the sizing roller hole shape, which has no driving capacity and requires a large rolling reduction amount, without twisting, a guide roller is installed just before the sizing roller to accurately transfer the rolled material to the sizing roller. It is to guide and guide the hole.

(d) Means for solving the problem The present invention is arranged on the exit side of the rolling roll R, and the guide box 1 includes a guide roller 2 for accurately guiding the rolled material to the sizing roller groove.
It is equipped with a sizing roller 3 that shapes the free surface of the rolled material that is not rolled down by the rolling roll R,
The guide roller 2 is rotatably supported by the guide box 1 together with a bearing on an eccentric support shaft 4 provided parallel to the axial direction of the rolling roll R, and the eccentric support shaft 4 is supported by a worm wheel 4a provided at the end of the shaft.
and pinion 4b, the center distribution between the guide rollers 2 can be adjusted.

The sizing roller 3 has an oval (including semi-oval) hole shape, and is rotatably supported by an eccentric support shaft 5 provided perpendicularly to the axial direction of the rolling roll R together with a bearing 3a. The eccentric support shaft 5 is configured such that the center distribution between the centers of the sizing roller 3 can be adjusted by a worm wheel 5a provided on the upper part of the shaft and a pinion 5b which meshes with the worm wheel 5a and whose screw leads are opposite to each other. has been done.

(E) Effect According to the present invention, the rolled material is first guided by the guide roller 2 provided in parallel to the axis of the rolling roll R so that the eccentric support shaft 4 is accurately guided so as not to cause twisting. The eccentric support shaft 5 is inserted into the groove shape, and then the free surface of the groove formed in the direction perpendicular to the axis of the rolling roll R is sized by the oval sizing roller 3, as shown in FIG. 4A. Since the concave portion of the free surface of the rolled material W which is not directly rolled by the rolling roll R is widened like the convex portion shown in FIG. It is fitted into the mold without any gaps and can be rolled without creating fold-in flaws as in the conventional method.

Furthermore, according to this method, the corner portions of the rolled material are also sized, so that the occurrence of wrinkle defects is also prevented.

(F) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

This device consists of a guide box 1, a guide roller 2 provided in the guide box 1 in order from rolling roll R, and a sizing roller 3 with an oval hole shape, and the guide roller 2 is rotatably fitted into the guide box 1. The eccentric support shaft 4 is rotatably supported together with a bearing (not shown), and the eccentric support shaft 4 is disposed parallel to the axial direction of the rolling roll R. A pinion 4b whose screw leads are opposite to each other is engaged with a worm wheel 4a provided at the end of the eccentric support shaft 4, and when the pinion 4b is rotated, the eccentric support shaft 4 is rotated according to the direction of rotation. By rotating in opposite directions, the center-to-center dimensions of the guide rollers 2 are adjusted to center distribution.

The sizing roller 3 has a bearing 3a on an eccentric support shaft 5 rotatably fitted to the guide box 1.
It is rotatably supported on the eccentric support shaft 5.
are arranged perpendicularly to the axial direction of the rolling roll R. A pinion 5b with opposite screw leads is connected to and screwed into a worm wheel 5a screwed onto the upper part of the eccentric support shaft 5 by a clutch 5c, and when the pinion 5b is rotated, its rotation is The eccentric support shafts 5 are rotated in opposite directions depending on the moving direction, and the center-to-center distance of the sizing roller 3 is adjusted to the center distribution. By disengaging the clutch 5c, it is possible to individually adjust the centers of the left and right sizing rollers 3.

The present invention can be installed in either a rolling mill row with an H-H arrangement or a rolling mill row with a V-H arrangement, and can be applied not only to the box-shaped rolled material mentioned above, but also to oval, square, etc. shapes. It is.

(g) Effects of the invention According to the invention, in the rough rolling process, compared to the conventional equipment in which the free surface was not sufficiently shaped by indirectly rolling down the rolled material from above and below for sizing. The free surface of the rolled material can be sized using a sizing roller with an oval groove, and when twisting occurs in the rolled material, such as when the amount of reduction for sizing the rolled material is large, Since it can be assisted by a guide roller to accurately fit into the hole shape of the sizing roller, it is possible to perform sufficient sizing of the free surface and prevent folding and wrinkling defects, resulting in even more precision. It is possible to produce high-yield products.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a partially sectional front view showing the − part of Fig. 2, Figs. , 4th
FIG. C is an explanatory diagram of the relationship between the rolled material, the rolling roll caliber, and the sizing roller groove. R... Rolling roll, W... Rolling material, 1... Guide box, 2... Guide roller, 3... Sizing roller, 4... Eccentric support shaft of guide roller,
5... Eccentric support shaft of the sizing roller.

Claims (1)

[Scope of utility model registration request] It consists of a guide box 1 disposed on the exit side of the rolling roll R of a strip rolling mill, and a guide roller 2 and a sizing roller 3 provided in the guide box 1 in order from the rolling roll R side.
and the sizing roller 3 are provided with eccentric support shafts 4, 5 rotatably provided in the guide box 1, respectively.
The eccentric support shaft 4 of the guide roller 2 is provided in a direction parallel to the axis of the roll R, and the eccentric support shaft 5 of the sizing roller 3 is provided in a direction perpendicular to the axis of the roll R. The eccentric support shafts 4 and 5 are provided with worm wheels 4a and 5a provided on the upper part of the shaft, respectively, and pinions 4b and 5 that mesh with the worm wheels 4a and 5a and have screw leads opposite to each other.
A sizing device for strip material, characterized in that the center distribution center distance can be adjusted by (b), and the hole shape of the sizing roller 3 is oval.