JPH064963Y2 - Mold device for width reduction press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a die apparatus for a width reduction press in a rolling line and a continuous casting line.

[Prior Art] Conventionally, in a width reduction press, in order to reliably grasp the plate material during width reduction, in order to increase the coefficient of friction with the plate material, the surface of the die plate material that is width reduction is subjected to uneven processing or slit processing. And so on.

Specifically, as shown in FIGS. 7 and 8, a groove b is bored in the central portion of both surfaces of an inclined surface and a parallel surface for width-reducing the plate material d of the mold a. There is one in which a convex portion c protruding in a circular arc shape is provided in the inner part of b in the rolling direction (see Japanese Utility Model Laid-Open No. 63-95643).

As another example, as shown in FIG. 9, a plate shape of the mold e extends over the inclined surface and the parallel surface on the side where the plate is width-reduced, and the center portion of both surfaces is in a lattice shape oblique to the thickness direction of the mold e. Slit f
Is provided (see JP-A-63-252634).

[Problems to be Solved by the Invention] However, in the mold a as shown in FIGS. 7 and 8, when the thickness of the plate material d changes, the height of the pass line of the plate material d is constant. Therefore, the convex portion c cannot press the vicinity of the center of the plate material d in the thickness direction, and the both ends of the plate material d in the width direction cannot be reliably sandwiched. For this reason, when the contact portion of the plate material d with respect to the mold a slips and moves up or down due to the width reduction, the contact portion height of the mold a with respect to the plate material d is at both width end portions of the plate material d. Therefore, the plate material d is twisted in the width direction due to the width reduction. This twist is the rear end of the plate material d (the end on the trailing edge side).
Also, the smaller the thickness of the plate material d, the more remarkable.

Further, in the mold e as shown in FIG. 9, although the lattice-shaped slits f are provided, a sufficiently large frictional resistance cannot be obtained with the slits f, so that the above-mentioned FIGS. Similar to the one shown in the figure, there is a risk of twisting at the rear end of the plate material, and the unevenness of the grid-like slits f that repeats width reduction wears and becomes smooth, so the plate material is becoming more and more width reduced. However, there is a problem in that it is not possible to reliably grip.

The present invention has been made in view of the above circumstances, and provides a die device for a width reduction press that can surely prevent twisting of a plate material under width reduction and can also cope with a change in thickness of the plate material. That is the purpose.

[Means for Solving the Problem] The present invention is directed to a slanted surface that faces toward the center in the width direction of the plate material toward the downstream side in the pass line direction of the plate material when viewed in plan, and the path line direction of the plate material that is continuous with the slanted surface. In a width reduction press having a pair of left and right dies capable of approaching and separating, having a parallel surface with respect to the parallel surface, the inclined surface of the mold and the center portion in the thickness direction of the parallel surface are required in the thickness direction of the mold. A metal for a width reduction press, characterized in that a plurality of tapered projections that extend in the pass line direction of the plate material and that have a downward slope toward the end are provided in parallel at both end portions of the plate material in the pass line direction at intervals. It is related to the mold device.

[Operation] Both end portions on the pass line direction side of the plate material, which are provided in the thickness direction central portion of the inclined surface facing the plate material of the mold and the parallel surface connected to the inclined surface at a required interval in the thickness direction of the mold The projections, which are tapered toward the end and have a downward slope, easily bite into both ends in the width direction of the plate material during width reduction, and a plurality of shallow groove presses are performed. The plate material is securely fixed and held by the plurality of shallow groove presses by this biting, and the plate material is prevented from being twisted when the width is reduced.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a mold in a mold device for a width reduction press of the present invention, FIG. 2 is a view taken in the direction of arrows II-II in FIG. 1, and FIG. 3 is a direction III-III in FIG. FIG. 4 is a view showing the width reduction state of the plate material by the die device of the width reduction press of the present invention.

When viewed in plan, the inclined surface 2 facing the widthwise center side of the plate material 5 toward the downstream side in the pass line direction X of the plate material 5 and the parallel surface 3 parallel to the pass line direction X of the plate material 5 connected to the inclined surface 2. In a width reduction press provided with a pair of right and left molds 1 that can be brought close to and separated from each other, in the center portion of the inclined surface 2 of the mold 1 and the parallel surface 3 continuous with the inclined surface 2, A plurality of rows (three rows in the figure) of protrusions 4 are provided in parallel from the inclined surface 2 to the parallel surface 3 at a required interval in the thickness direction. Both end portions in the longitudinal direction of the protrusions 4 (both side portions of the plate material 5 on the X side in the pass line direction) are tapered so as to have a downward slope toward the ends.

As described above, since the projections 4 are provided in parallel in a plurality of rows in the thickness direction of the mold 1, at the central portions in the thickness direction of the inclined surface 2 and the parallel surface 3 of the plate material 5 of the mold 1 which are subjected to the width reduction, At this time, as shown in FIG. 4, the projections 4 easily bite from the taper portions on both side portions in the width direction of the plate material 5, and a plurality of shallow groove presses are performed, so that the plate material 5 can be securely fixed and held, and the width in one direction can be increased. It is possible to prevent the rear end portion (end portion on the trailing edge side) of the plate member 5 from being twisted during the rolling reduction, so that the one-way width rolling can be stably performed.

Further, even if the thickness dimension of the plate material 5 changes, any of the protrusions 4 bites into both end portions of the plate material 5 in the width direction, and the plate material 5
Can be securely fixed and held, and the thin plate member 5 can also be prevented from being twisted when the width reduction bottom slips out.

Further, FIG. 5 shows another embodiment of the die apparatus for the width reduction press of the present invention, in which the plate material 5 of the die 1 is subjected to the width reduction of the inclined surface 2 and the parallel surface 3. The three rows of protrusions 4 provided in the central portion in the thickness direction are divided on the inclined surface 2 of the mold 1.

Even in the above-mentioned case, the above-mentioned FIG. 1 to FIG.
Similar to the one shown in the figure, when the width reduction is performed, the projections 4 easily bite from the taper portion to both widthwise end portions of the plate material 5 to perform a plurality of shallow groove presses, so that the plate material 5 can be securely fixed and held. It is possible to prevent the rear end portion (the end portion on the trailing edge side) of the plate member 5 from being twisted when the width of the plate member 5 is reduced by one direction.
It is also possible to cope with changes in the thickness dimension of.

Further, FIG. 6 shows a further embodiment of the die apparatus for the width reduction press of the present invention, in which the surface of the die 1 at the center of the thickness direction of the plate material is inclined. The protrusions 4 are provided in a zigzag manner in parallel to the thickness direction of the mold 1 from the surface 2 to the parallel surface 3.

Even in the above-mentioned case, the above-mentioned FIG. 1 to FIG.
Similar to the one shown in the figure, when the width reduction is performed, the projections 4 easily bite from the taper portion to both widthwise end portions of the plate material 5 to perform a plurality of shallow groove presses, so that the plate material 5 can be securely fixed and held. Thus, it is possible to prevent the rear end portion (end portion on the trailing edge side) of the plate member 5 from being twisted when the width of the plate member 5 is reduced, and it is possible to cope with a change in the thickness dimension of the plate member 5.

It should be noted that the present invention is not limited to the illustrated and described embodiments, and for example, it is optional to provide protrusions on the entire surface of the die plate that presses down the plate material, and other than that, without departing from the scope of the present invention. Of course, various changes can be made.

[Effects of the Invention] As described above, the mold apparatus for the width reduction press of the present invention is configured so that the plate material is securely fixed and gripped by performing a plurality of shallow groove presses on both end portions in the width direction of the plate material. (I) The unidirectional width press can be stably performed.

(Ii) It is possible to prevent twisting of the plate material that may occur when the width of the plate is conventionally reduced.

(Iii) It is possible to cope with changes in the thickness of the plate material.

(Iv) The structure is simple.

It exhibits various excellent effects.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a mold in a mold device for a width reduction press of the present invention, FIG. 2 is a view taken in the direction of arrows II-II in FIG. 1,
FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2, FIG. 4 is a view showing a width reduction state of a plate material by a die device of a width reduction press according to the present invention, and FIGS. FIG. 7 is a view showing another embodiment of the die device of the present invention, FIG. 7 is a longitudinal section of the die in the die device of the conventional width reduction press, and FIG. FIG. 8 is a view in the direction of arrows VIII-VIII in FIG. 7, and FIG. 9 is a perspective view of a mold in another conventional mold apparatus for a width reduction press. In the figure, 1 is a mold, 2 is an inclined surface, 3 is a parallel surface, 4 is a protrusion, and 5 is a protrusion.
Indicates a plate material, and X indicates a pass line direction.

Claims (1)

[Scope of utility model registration request] 1. A flat surface having a slanted surface directed toward the widthwise center side of the plate material in the pass line direction of the plate material and a parallel surface parallel to the pass line direction of the plate material connected to the slanted surface. In a width reduction press equipped with a pair of left and right dies capable of approaching and separating, a pass line of a plate material is formed at a required interval in the thickness direction of the die at the center portion in the thickness direction of the inclined surface and the parallel surface of the die. 1. A die device for a width reduction press, characterized in that a plurality of projections, each of which extends in a predetermined direction and has a taper with a downward slope toward the end, are provided in parallel at both end portions on the pass line direction side of the plate material.