JP3306577B2 - Non-slip printing method and apparatus for mold steel for groove lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming an uneven slip stopper on one end in the width direction of an I-shaped or rectangular section steel used as a main bar of a steel groove cover by hot rolling. .

[0002]

2. Description of the Related Art In a mold steel used as a main bar of a steel groove cover, in order to prevent a slip, an uneven non-slip which is continuous in a longitudinal direction may be formed on one end surface in a width direction as a tread surface. is there.

Generally, as shown in FIG. 4, such a non-slip anti-slip structure is formed by forming a cross section I-shaped or rectangular die steel 1 between a pair of printing press forming rolls 2 and a die 2a. It is rolled in the width direction, and is formed by pressing the concave-convex shape 2b formed on the bottom of one of the molds on one end surface 1 'in the width direction of the die steel.

[0004] However, in the above-mentioned printing pressure molding, it is difficult to form a convex portion having a height effective for preventing slip. That is, at normal rolling force, as shown in FIG.
When one end face 1 'of the mold steel 1 is not sufficiently filled in the concave portion 2b' of the uneven shape 2b formed at the bottom of the one die 2a, and when the rolling force is increased, the mold steel 1 becomes a seat as shown in FIG. This is because a buckling deformation occurs, so that the one end face 1 ′ may not be sufficiently filled in the concave portion 2 b ′ formed at the bottom of the one die 2 a.

For this reason, recently, Japanese Patent Publication No. 3-44841 has been disclosed.
A method as disclosed in Japanese Patent Application Laid-Open Publication No. H10-26095 has been performed. According to this method, in the tentering rolling step before the non-slip stamping forming, as shown in FIG. The ridge 1a is formed so as to protrude, and as shown in FIG. 2B, both sides of the ridge 1a are narrowed by a forming roll to form a ridge 1a 'having an increased height. Then, in the subsequent printing pressure forming step, as shown in FIG.
Is rolled in the width direction between the dies 2a, 2a of the printing pressure forming rolls 2, 2, and the concave-convex shape 2b formed on the bottom of one of the dies is applied to the end face 1a '' of the ridge 1a '. It is.

That is, according to this method, the uneven pressure-slip non-slip printing is performed by the end face 1 of the small-thick ridge 1a 'protruding from the center of one end face 1' in the width direction of the groove-covering mold steel.
a '', so that even when the rolling force of the printing pressure forming rolls 2 and 2 is reduced, the ridges 1a 'of the mold steel 1 are sufficiently formed in the concave portions of the concave-convex shape 2b formed at the bottom of one die. Fill it,
An uneven shape can be formed on the end face 1a ''.

[0007]

However, according to the above-mentioned method, the width (thickness) of the end face 1a '' of the ridge 1a 'serving as the tread surface is extremely small, and a shape effective for preventing slip cannot be obtained. , A large anti-slip effect could not be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it has been proposed that a longitudinal direction be provided on one end surface in the width direction of a shaped steel without providing any ridges or the like and without causing any buckling deformation. An object of the present invention is to provide a method and an apparatus for non-slip printing of a mold steel for a groove cover capable of forming a non-slip non-slip of a desired height effective for preventing slip continuous in a direction with high dimensional accuracy.

[0009]

In order to achieve the above object, the method of the present invention is to hot roll an I-shaped or rectangular section steel between a pair of printing pressure forming rolls by hot rolling, and to roll the steel in the width direction. When forming the concave and convex formed on the bottom of one of the molds on one end surface, the central part in the width direction of the mold steel is guided by a pair of support rolls with a guide arranged in the central part between the axes of the pair of pressure forming rolls. Support from both sides. This prevents the buckling deformation of the die steel due to the rolling force of the printing pressure forming roll, and the uneven non-slip with high dimensional accuracy of a desired height continuous in the longitudinal direction is applied to one end surface in the width direction of the die steel. It is like that.

Further, the apparatus of the present invention used for carrying out the above-mentioned method is characterized in that an I-shaped or rectangular section steel is hot-rolled in the width direction between the molds and one end face in the width direction of the section steel. A pair of printing pressure forming rolls for press-forming the unevenness formed on the bottom of the die, and a central portion between the axes of the pair of printing pressure forming rolls, the width of which is parallel to and sandwiching the die steel to be pressed. And a pair of support rolls with guides that support the central portion in the width direction of the die steel rolled by the printing pressure forming roll from both sides.

[0011] In this device, a concave groove is formed on the peripheral surface of the pair of printing pressure forming rolls to avoid contact with the bearing portion of the pair of supporting rolls with guides disposed at the center between the axes of the forming rolls. Symmetrically around the mold.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1-2 (a) and (b) show that an uneven slip stopper is formed on one end in the width direction of a groove-covering mold steel according to the present invention. Is the shape steel, 2,
Reference numeral 2 denotes a pair of printing pressure forming rolls, and reference numerals 3 and 3 denote a pair of support rolls with a guide.

The section steel 1 before the stamping is an intermediate rolled material having an I-shaped cross section, a predetermined width L and a predetermined thickness T, T 'at the end and the center. .

A pair of printing pressure forming rolls 2 and 2 roll the above-mentioned mold steel 1 in the width L direction between the two molds 2a and 2a, and use the rolling force to form an uneven shape formed on one of the mold bottoms. 2b is formed by continuously applying a pressure to the widthwise end surface 1 'of the mold steel along the longitudinal direction, and is a vertical roll.

The shafts 2c, 2c of the pair of printing pressure forming rolls
A pair of support rollers 3 and 3 as guides, which are horizontal rolls, are provided at the center portion between the rolls in parallel with the mold steel 1 rolled by the printing pressure forming rolls 2 and 2 in the width L direction of the mold steel. 3a, 3a are arranged so as to substantially coincide with each other. The pair of guide-support rollers 3 and 3 support the central portion in the width direction of the mold steel at the time of the printing pressure forming from both upper and lower surfaces to prevent the buckling deformation of the mold steel 1 caused by the printing pressure, and at the same time, to prevent the center of the width L of the mold steel. This also ensures the dimensional accuracy of the part thicknesses T, T 'and the like.

Guided support rolls 3, 3 shown in this embodiment
As shown in FIG. 3, a pair of upper and lower supports for holding a material to be rolled are provided with a guide device 4 for regulating the die steel from above, below, left and right by guide rails 5 and guiding the steel between the die of the printing pressure forming roll 2. In the roll 3, the gap between the support rolls can be adjusted according to the thickness of the central portion of the section steel to be stamped.
Further, it has a shape and strength that can prevent buckling of the width portion at the time of printing.

With the installation of the support rolls with guides, grooves 2d are formed on the peripheral surfaces of the printing pressure forming rolls 2 and 2 to avoid contact with the left and right bearings 3b and 3b of the support rolls 3 and 3. , 2d are provided circumferentially at symmetrical positions sandwiching the die 2a.

[0018]

Example 1 A groove cover having an I-shaped cross section formed by performing predetermined tentering rolling and thickness rolling to form a width L 5.3 mm, an end part thickness (T) 8 mm, and an intermediate part thickness (T ') 5 mm. Using the mold steel as a test material, the uneven pressure non-slip printing was performed by the method of the present invention and the conventional method shown in FIG.

As a result, in the conventional method, the height of the protrusion of the non-slip portion applied to one end surface in the width direction of the test material is 1.
If it exceeds 0 mm, buckling deformation occurs, and it becomes impossible to form a convex portion having a desired height. On the other hand, according to the method of the present invention, even if the height of the convex portion of the non-slip portion applied to one end surface in the width direction of the test material exceeds 1.0 mm and further exceeds 3.0 mm, buckling deformation occurs. No protrusion was generated at all, and a convex portion having a height and a shape effective for preventing slippage could be formed with high accuracy according to the mold.

[0020]

Embodiment 2 A predetermined width-rolling and thickness-rolling is carried out, and a rectangular section steel mold for a groove cap formed to have a width L of 53 mm and an end thickness (T) of 7 mm is used as a test material. In accordance with the conventional method shown in FIG. 4, irregular-shaped non-slip printing was performed.

As a result, in the conventional method, when the height of the convex portion applied to one end surface in the width direction of the test material exceeds 1.2 mm, buckling deformation occurs and the convex portion having a desired height is formed. Can no longer be formed. On the other hand, according to the method of the present invention, even if the height of the protruding portion imprinted on one end surface in the width direction of the test material exceeds 1.2 mm and further exceeds 3.0 mm, buckling deformation may occur at all. As a result, it was possible to accurately and accurately form a convex portion having a height and a shape effective for preventing slippage.

[0022]

As described above, according to the present invention, it is possible to effectively prevent the buckling deformation of the groove-covering mold steel which occurs at the time of forming the irregular-slip non-slip printing. Therefore, it is possible to form with a large printing pressure, and it is possible to accurately form an uneven slip stopper having a height and a shape effective for preventing longitudinal continuous slip on one end surface in the width direction of this type of mold steel. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a method of the present invention.

FIG. 2 is a view for explaining the method of the present invention, (a) is a side view,
(B) is a front view.

3A and 3B are diagrams for explaining the structure of a guide-supporting roll provided with a guide device, wherein FIG. 3A is a plan view, and FIG.

FIG. 4 is a perspective view illustrating non-slip stamping molding of a mold steel for a groove cover by a conventional general method.

FIG. 5 is a longitudinal sectional front view for explaining a problem in a conventional general method.

FIG. 6 is a longitudinal sectional front view for explaining another problem in the conventional general method.

FIG. 7 is a view for explaining another conventional non-slip stamping pressure forming performed by forming a ridge on a mold steel for a groove cover, (a) is a longitudinal sectional front view showing a step of forming a ridge, and (b) is a front view. It is a vertical front view which shows the narrowing pressure process which increases the height of a ridge, and (c) is a front view which shows the coining process of non-slip to a ridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold steel 2 Printing pressure roll 3 Support roll with a guide 4 Guiding device 5 Guide rail

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21H 8/00 B21H 8/02 B21B 1/08 E03F 5/06 B21B 39/14

Claims (4)

(57) [Claims] 1. A cross section of an I-shaped or rectangular mold steel is rolled in the width direction between a pair of printing press forming roll dies by hot rolling, and formed on one end of the width direction at the bottom of one of the dies. When forming irregularities by printing pressure, buckling deformation of the shape steel is supported by supporting the center portion in the width direction of the shape steel from both sides with a pair of support rolls with a guide arranged at the center between the axes of a pair of printing pressure forming rolls. A non-slip stamping pressure forming method for a mold steel for a groove cover, wherein a high unevenness is applied to one end surface in a width direction of the mold steel. 2. A non-slip type steel for a groove cover having an I-shaped cross section, wherein irregularities having a height of 1.0 to 3 mm continuous in a longitudinal direction are formed on one end surface in a width direction by the method of claim 1. 3. A non-slip type steel for a groove cover having a rectangular cross-section formed by forming irregularities having a height of 1.0 to 3 mm continuous in the longitudinal direction on one end surface in the width direction by the method of claim 1. 4. An I-shaped or rectangular cross section steel sheet is hot-rolled in the width direction between the mold sections to form an indentation formed on one end face in the width direction of the mold section at one bottom of the mold section. A pair of printing pressure forming rolls, at the center between the axes of the pair of printing pressure forming rolls,
A pair of guides that are arranged in parallel with the die steel to be stamped and with the roll axis substantially aligned with the width direction of the die steel, and support the center in the width direction of the die steel rolled by the stamping press roll from both sides. Non-slip stamping pressure forming equipment for mold steel for groove lids, comprising a support roll.