JPH0631368A - Indent working method for linear material and filamentous material having rolled trace - Google Patents

Abstract

PURPOSE:To provide an indent working method for a linear material by which the productivity, the precision and quality of products are improved by rationalizing the order of rolling tracing for lines of rolled traces arranged around a linear material to reduce the twisting and bending deformation of filamentous material and the filamentous material having rolled traces on it. CONSTITUTION:The indent working for the filamentous material is carried out by using undermentioned method. While the plural lines of rolled traces a1, b1, c1 and d1 are sequentially formed on the circumference of filamentous material 10 having intervals Y in the circumferential direction and X in the longitudinal direction of the filamentous material by plural indent rolls 1a, 1b, 1c and 1d in the order of clockwise, opposing side, counterclockwise and opposing side or counterclockwise, opposing side, clockwise and opposing side shifting the phase in the longitudinal direction of the filamentous material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for indenting a linear material such as PC steel wire, PC stranded wire and the like, which is applied as a strength material to concrete, resin and the like, and an indented linear material.

[0002]

2. Description of the Related Art Conventionally, an indented filament material is a piano wire
₃ is heated to the transformation temperature austenitization, quenching, patenting treatment to increase their strength and toughness quenched, the wire pickling, and cold drawn to the desired strength and wire diameter of the object by coating and die After the wire drawing process and, if necessary, the straightening process to straighten the bends and the like that occur during wire drawing with a straight line machine, a plurality of indentation rows (adhesive strength with concrete etc. are placed with a circumferential interval around the wire rod. Of the wire rod, and further, a stress relief (residual stress removal) process for removing the processing strain of the wire material by low-temperature baking and the like.
Further, the indent processing is performed, for example, in FIG.
As shown in (C), the indentation projections a, b, c, and d of a plurality of indent rolls (not shown) provide a circumferential interval (90 °) around the PC steel wire and the lengthwise direction. The phase is shifted, and indentation is sequentially made in the order of clockwise (+ 90 °) a, b, c, d, and P is set as in the development view shown in FIG. 3B.
The indentations in each row were surrounded by a1, b1, c1, d around the C steel wire 10.
1 Further, in the order of a1 and the phase is shifted in the length direction X, the phases are sequentially attached, or as shown in FIG. 3D, the counterclockwise rotation (−90 °) is performed in the reverse order of a, d, c and b. Imprint,
Indentations in each row around the PC steel wire were a1, d1, c1, b1.
Further, it is carried out in the reverse order of a1 and with the phases shifted in the length direction and sequentially attached (not shown). By shifting the phase of the indentations in each row in the lengthwise direction as described above, the reduction of the local cross-sectional area is minimized and almost equalized, and the strength and quality required by the prestressed concrete construction method etc. are increased. ing.

[0003]

In the conventional indenting process for a linear material, the indentation in each row, which is arranged around the linear material at intervals in the circumferential direction and the longitudinal direction as described above, is formed into a linear shape. Since the phase is shifted in the lengthwise direction in the order of clockwise or counterclockwise around the material, and the material is sequentially attached, an indentation load is applied sequentially with circumferential intervals around the material, and the material is rotated. Torque is likely to be generated, causing three-dimensional twisting and bending deformation,
It is difficult to correct the deformation, and a special treatment is required to straighten the linear material, which causes problems such as a decrease in productivity, product accuracy, and quality.

The present invention was developed in order to address the above-mentioned problems, and its object is to rationalize the indenting order of each indentation row arranged around the linear member. In addition, the present invention provides a method for indenting a linear material and an indented linear material that effectively reduces twisting, bending deformation, and the like of the linear material to improve productivity and improve product accuracy and quality.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to indentation of a linear material in which a plurality of indent rolls are provided to form a plurality of indentation lines by indenting circumferentially and longitudinally at intervals around the linear material. In the processing method, the indentations of each indentation row are arranged in the order of clockwise, facing side, counterclockwise and facing side of the strip material, or in the order of counterclockwise, facing side, clockwise and facing side and the same strip material. Since the phase is shifted in the lengthwise direction and the dents are sequentially formed by imprinting, twisting, bending deformation, etc. of the linear material due to the imprinting are effectively reduced and the productivity is improved.

Further, in a linear material with indentations in which a plurality of indentation rows are arranged by indenting at intervals in the circumferential direction and the length direction around the linear material, the indentations in each indentation row are In the order of clockwise, facing, counterclockwise and facing, or counterclockwise,
By arranging in the order of facing side, clockwise direction and facing side and shifting the phase in the length direction of the same linear material and sequentially making indentations, the bending deformation of the linear material is effectively reduced. The accuracy and quality are improved.

[0007]

[Function] With a plurality of indent rolls, a plurality of indentation lines are provided by making an indentation around the linear material at intervals in the circumferential direction and the longitudinal direction, and the indentation in each row is rotated clockwise of the linear material. Face-to-face, counterclockwise and face-to-face in order, or counterclockwise,
It is attached in the order of facing side, clockwise direction and facing side side, and sequentially indented by shifting the phase in the length direction of the linear material, and by combining the right-handed indentation and the counterclockwise indentation, the linear material Rotational torque is significantly reduced, its twisting, bending deformation, etc. are effectively reduced, post-treatment such as straightening is not required, and productivity is significantly improved, and the accuracy and quality of the straightness of the linear material and the arrangement of indentations are improved. Has been improved.

[0008]

1 shows an embodiment of an indent roll applied to the indenting process of the present invention, and FIG. 2 shows an embodiment of indentation of the present invention. In the figure, 1a, 1b, 1c and 1d are indent rolls, and a, b, c and d are indentation projections a1 which are projected on the peripheral surface of each indent roll at intervals.
b1, c1 and d1 are indentations or indentation rows of each row formed by each indentation projection, 5 is a gear portion obliquely provided on both side surfaces of each indent roll, and 10 is a linear material such as PC steel wire Then, the linear material 10 to be indented (indentation) is
For example, A ₃ transformation temperature of the piano wire (eight hundred and fifty to nine hundred and thirty ° C.)
After heating to austenite, the molten lead bath (500
To 600 ° C) and then subjected to patenting treatment to enhance strength and toughness by quenching and quenching, pickling and coating the wire rod and cold drawing (several times) with a die to obtain the desired wire diameter and required After the strength is increased, if necessary, a straightening machine is used to continuously bend it to correct the curl or the like that has occurred during wire drawing, and straightening is performed. Also, indent roll 1
a, 1b, 1c and 1d are a large number of indentation projections a or b, c, which are provided on the peripheral surface thereof at regular intervals as shown in FIG.
d, the gear parts 5 and 5 obliquely provided on both side surfaces, the rotary shaft 6 and the like, and a set of four cruciform arrangements are synchronously driven by an appropriate drive mechanism (not shown). (Interlocking with gears 5 and 5), it becomes an indenting device that attaches indentations a1, b1, c1, d1 in a plurality of rows on the circumferential surface of the linear material 10 by the indentation protrusions a, b, c, d. ing.

In the embodiment shown in FIGS. 1 and 2, the four indent rolls 1a, 1b, 1c, 1d are synchronously driven in the arrow direction R by the meshing of the adjacent gear parts 5, 5. When the linear material 10 is supplied between the indent rolls in the arrow direction X by an appropriate means, the indent rolls 1a, 1
The indentation projections a, b, c, d projecting at regular intervals on the peripheral surfaces of b, 1c, 1d provide intervals in the circumferential direction Y and the length direction X around the linear material 10. A plurality of indentation lines a1, b1, c1, d1 are provided by indentation, and the indentations a1, b1, c1, d1 in each line are arranged in the clockwise direction, facing side, counterclockwise direction and facing side of the linear member 10. In order (Figs. 2A, B,
(See C and E), or a line attached in the order of counterclockwise, facing side, rightward and facing side (see FIGS. 2D and F) and with a phase shift in the length direction X of the linear member 10 and indentation. It is a method of indenting the material.

Further, a plurality of indentation rows a1, b1, c1, d1 are arranged around the linear material 10 by indentation at intervals in the circumferential direction Y and the length direction X by the indenting method described above. In addition, the indentations a1, b1, c1, d of each indentation row
1 in the order of clockwise, facing side, counterclockwise and facing side of the wire rod 10 (see FIGS. 2A, B, C and E), or counterclockwise, facing side, clockwise and facing side (see FIG. (See 2D and F) and a linear material with indentations arranged by imprinting with the phase shifted in the length direction X of the linear material 10.

The above-mentioned imprinting order will be described in more detail. As shown in FIG. 2 (C), the operation order of the projections for imprinting is a, b, d, c or a, or as shown in FIG. 2 (E). If the operation order of the protrusions for indentation is d, a, c, b, and d, the order is clockwise, facing, counterclockwise, and facing, and the angle change in the circumferential direction Y at the indented position is: In both cases, + 90 ° + 0 ° −90 ° + 0 ° = 0 °, and due to the combination of the right-handed indentation and the left-handed indentation, the rotational torque of the linear material 10 disappears and its twisting,
Bending deformation and the like are effectively reduced, post-processing such as straightening is not required, productivity is remarkably enhanced, and the straightness of the linear material and the accuracy and quality of the arrangement of indentations are improved.

Further, as shown in FIG. 2D, the operation order of the protrusions for indentation is a, d, b, c or a, or FIG.
As shown in (F), the operation order of the indentation protrusions is b, a,
When c, d, and b are set, the counterclockwise direction, the facing side, the clockwise direction, and the facing side are in the order described above, and the angle changes in the circumferential direction Y at the indentation positions are -90 ° + 0 ° + 90 ° + 0.
° = 0 °, and the same action and effect as those shown in FIGS. 2C and 2E can be obtained.

In the conventional example shown in FIGS. 3C and 3D, the operating order of the indentation projections in each row is clockwise or counterclockwise as shown in the drawing, and the indentation position is in the circumferential direction Y. The angle change of (+ 90 °) × 4 = + 360 ° or (−90 °)
.Degree.). Times.4 = -360.degree., A rotational torque is generated in the linear material 10 and causes twisting, bending deformation, or the like.

In the illustrated embodiment, four rows of indent rolls are used to form four rows of indentations a1, b1, on the circumferential surface of the wire rod 10.
c1 and d1 are attached, but the number of indent rolls and the number of rows of indentations can be changed to various designs by increasing or decreasing as necessary within the range where the above-mentioned actions and effects can be obtained. It is possible.

[0015]

EFFECTS OF THE INVENTION According to the present invention, a plurality of indent rolls are provided on a plurality of indentation rows at intervals around the filament material in the circumferential direction and in the longitudinal direction so as to be indented. Right-handed, facing side, left-handed and facing side of the strip, or left-handed, facing side, right-handed and facing side, and indented sequentially by shifting the phase in the length direction of the strip. With the combination of the right-handed indentation and the left-handed indentation, the rotational torque applied to the wire material is significantly reduced and the twisting and bending deformation is effectively reduced. Is unnecessary and the productivity is remarkably improved, and the accuracy and quality of the straightness of the filament material and the arrangement of the indentations are improved.

[Brief description of drawings]

FIG. 1 is a side view mechanism diagram (A) and a front view (B) showing an embodiment of an indent roll applied to an indent processing method of the present invention.

FIG. 2 is an operation pattern diagram (A) of projections for imprinting showing respective examples of the indenting method of the present invention and an example of a linear material with imprints, a development view (B) of the same linear material and each. Indentation pattern diagrams (C) to (F)

FIG. 3 is an operation pattern diagram (A) of a protrusion for imprinting, a development view (B) of a linear member, and respective indentation pattern diagrams (C) (D) showing respective conventional examples of the indenting method.

[Explanation of symbols]

 1a, 1b, 1c, 1d Indent rolls a, b, c, d Indentation projections a1, b1, c1, d1 Indentations, indentation rows 10 Wire rod Y Circumferential direction (line rod) X Length direction (line rod) Material)

Claims (2)

[Claims] 1. An indenting method for a linear material in which a plurality of indent rolls are provided to form a plurality of indentation lines by indenting circumferentially and longitudinally around a linear material by a plurality of indent rolls, and indenting method of each indentation line. The indentations are shifted clockwise, facing side, counterclockwise and facing side of the strip material, or leftward, facing side, clockwise and facing side and in the longitudinal direction of the strip material. An indenting method for a linear material, which is characterized by being sequentially indented and attached. 2. A linear material with indentations in which a plurality of indentation rows are arranged by denting at intervals in the circumferential direction and in the length direction around the linear material, and the indentation of each indentation row is Clockwise of
Arranged in the order of facing side, counterclockwise and body surface side, or in the order of counterclockwise, facing side, clockwise and facing side, and staggered in sequence in the length direction of the linear material, and sequentially denting. A linear material with an indentation.