Metal deforming – By use of roller or roller-like tool-element – With handling of – or guiding of – work or product relative to...
Reexamination Certificate
1999-09-21
2001-05-29
Butler, Rodney A. (Department: 3725)
Metal deforming
By use of roller or roller-like tool-element
With handling of, or guiding of, work or product relative to...
C072S250000
Reexamination Certificate
active
06237387
ABSTRACT:
BACKGROUND
The present invention relates to an entrance roller guide apparatus provided for guiding a material to be rolled, hereinafter a workpiece material, to a rolling roller for rolling such a shape steel as a channel steel or the like.
It is well known that related arts greatly influence the quality of a final product when there is torsion or roll flaw of a material to be rolled, or a difference in height between left and right flanges thereof, in a rolling work of a channel steel. Causes of these phenomena include, first, that the width of a workpiece material which has advanced to a rolling roller is larger than that of an opening portion of a roll. Second, another of the causes is due to that it is difficult to identify a deformation of the workpiece material in a grooved rolling so that channel forming becomes difficult, which is well known.
On the contrary, in view of that, when a channel material is rolled, a width of the workpiece material, or the channel material, is conventionally larger than that of the roll opening portion, the width between friction guides is narrowed so that the workpiece material is guided to grooves of rolling rolls while the material passing through between the guides is forcibly shaped.
Also, as a related art, there has been proposed an entrance guide apparatus for a rolling mill where a roughly shaped workpiece material is accurately centered and rolled to be guided to grooves of rolling rolls by a centering roller provided inside the workpiece material having a width larger than a caliber width of the rolling rolls and standing type entrance guide rollers provided outside the workpiece material (Japanese Utility Model Application Publication No. 53 (1978)-32110).
In the related arts, there occurs a problem that, when the material workpiece is shaped by squeezing by only the friction guides, since the workpiece material is guided while being forcibly shaped, a scratching flaw occurs in a final product. Prevention of such a flaw is is attempted by providing the friction guides to guide the workpiece material with a clearance of several mm between the friction guides and the workpiece material. However, there occurs a problem that biting or engaging performance of the workpiece material to the caliber deteriorates and torsion of the material is easy to occur.
Also, when positions of the friction guides are adjusted, it is possible to adjust the width of the workpiece material in left and right directions. However, as the friction guides cannot be adjusted in a vertical direction, an advancing angle to the rolling roll cannot be adjusted in the vertical direction. Accordingly, there is a problem in which it becomes difficult to effect an exact introducing guide of the material by position adjustment of the friction guides.
Also, the above proposal is for feeding a rough steel material into the grooves of the rolling rolls by using the centering roller and the entrance guide roller. As the feeding of the rough steel material to the grooves of the rolling rolls is directly effected from these rollers positioned at positions spaced from the grooves, there is a limitation in improving an accuracy of the introducing guide for the material. As a result, it becomes difficult to prevent torsion or a flaw from occurring in the rough steel material.
SUMMARY OF THE INVENTION
An object of the present invention is to improve a quality of such a final product as a channel steel material by reducing a possibility that torsion or a flaw occurs in a material to be rolled, hereinafter a workpiece material, guided into grooves of rolling rolls by using an entrance roller guide apparatus.
A feature of the present invention lies in that a combination structure of an entry guide and an upper guide is disposed at an entrance side of an advancing path of a workpiece material, and side rollers, guide rollers and tip end chips are sequentially disposed so that it is made possible to introduce and guide the workpiece material into grooves of rolling rolls without occurrence of torsion or roll flaw.
In this invention, the workpiece material is a shaped steel material which is passed through between the rolling rolls to be formed into a channel steel or an angle steel and which is, in advance, formed into a section preferable as a material to be worked.
Also, the entry guide is disposed at an entrance of the advancing path for the workpiece material and serves as means for effecting a rough position adjustment of the workpiece material, as advancing to the entrance, in a left or right direction. This entry guide is provided with wall faces having a wide entrance width and a narrow exit width at both sides.
Also, the upper guide is provided above and at the same position as the entry guide and acts as a means for effecting a rough position adjustment in a vertical direction on the rough steel material advancing in the upper guide.
Next, the side rollers are provided on a pair of standing shafts downstream of the above entry guide and the upper guide, and they respectively comprise tapered rollers each having a small diameter at an upper portion. The workpiece material passing through between the side rollers is centered while being shaped in left and right directions, and it is fed out to the next guide rollers. It should be noted that the standing shafts axially supporting each side roller are eccentrically mounted shafts which is provided with a fine adjustment means which can be finely adjusted by rotating a worm gear externally.
The guide rollers comprise a pair of rollers which are respectively axially supported on a pair of horizontal shafts at a downstream side of the side rollers so as to be opposed to each other in a vertical direction, and they serve so as to effect a final position adjustment (a leveling adjustment) of the workpiece material in a vertical direction. The workpiece material passes through between the guide rollers so that engagement of the workpiece material with the rolling rolls is made smooth. Thus, the guide rollers serve to prevent misrolling of the workpiece material. It should be noted that the pair of horizontal shafts respectively comprise eccentrically mounted shafts, and they are respectively provided with a fine adjusting means for independently effecting fine adjustment by rotating a gear externally.
The tip end chips are disposed at an exit of the advancing path of the workpiece material, and they serve to adjust introduction of the workpiece material, which has been fed from the guide roller apparatus, into the grooves of the rolling rollers. Particularly, each tip end chip has a function which, when a tip end or the like of the workpiece material could not have been adjusted sufficiently by the side rollers and the guide rollers, leads and guides the workpiece material to prevent left or right shifting or displacement thereof.
REFERENCES:
patent: 3765214 (1973-10-01), Boehmer
patent: 4039107 (1977-08-01), Boley
patent: 4270376 (1981-06-01), Shimada
patent: 4295356 (1981-10-01), Fabris
patent: 4546527 (1985-10-01), Fukuda et al.
patent: 4680953 (1987-07-01), Fabris
patent: 4790164 (1988-12-01), Rothe
patent: 4860426 (1989-08-01), Engel et al.
patent: 5085067 (1992-02-01), Reismann et al.
patent: 5743127 (1998-04-01), Taskeda et al.
patent: 152-293 (1981-11-01), None
patent: 53-32110 (1978-08-01), None
patent: 1163-931 (1985-06-01), None
Miyamoto Takahiro
Takaoka Toshio
Yoshizawa Sadao
Butler Rodney A.
Jordan and Hamburg LLP
Kotobuki Sangyo Kabushiki Kaisha
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