JPH09136248A - Die groove machining method for cemented carbide ring roll hole type die for rolling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To machine die grooves, which are varied in shapes, sizes, and sorts, by means of a single grinding wheel without preparing multiple grinding wheels dedicated for respective die groove shapes when a die groove is machined on the inner circumferential face in a cemented carbide ring roll hole type die for rolling. SOLUTION: In a work spindle 10 and a grinding wheel spindle 18, which are arranged parallelly to each other, a cemented carbide ring roll 12 serving as a workpiece and a die groove machining grinding wheel 20 are installed individually so as to be rotated integrally with the spindles 10, 18. According to the X-axis directional movement or the Y-axis directional movement of the grinding wheel spindle 18, the die groove machining grinding wheel 20 is shifted in the width direction or in the depth direction of a die groove 28, so that the die groove 28 in the predetermined shape is cut and formed on the outer circumferential face of the ring roll 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of grinding a die groove on a circumferential surface of a carbide ring roll hole die for rolling.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a groove on a circumferential surface of a carbide ring roll die for rolling a wire rod or the like, as shown in FIG.
Disk-shaped grindstone 1 having a cross-sectional shape corresponding to that of 0
No. 02 is used to rotate the carbide ring roll for rolling 104 and the grindstone 102 to be processed, and the grindstone 102 is moved forward in the direction perpendicular to the outer peripheral surface of the ring roll 104 to electrolyze the die groove 100. The method of grinding was used.

[0003]

However, in the case of this method, a dedicated die-grooving grindstone 102 that accurately corresponds to the shape and size of the die groove 100 is required, and the shape and size of the die groove 100 are required. There are a great variety of types, for example, depending on the cross-sectional shape, wire diameter, etc. of the rolled wire rod. Therefore, it is necessary to prepare an extremely large number of dedicated grindstones 102 for die grooving in advance. There was a problem that needed.

In addition, the shape of the mold groove 100 to be processed and formed,
Each time the size changes, it is necessary to remove the grindstone 102 mounted on the grindstone spindle, and then attach a corresponding dedicated grindstone 102, which requires a lot of trouble and time for the setup change. This was a factor that hindered productivity.

Furthermore, since the grindstone 102 becomes clogged and changes in shape while continuing the grinding process, it is necessary to perform dressing including sharpening and shape modification of the grindstone 102 in a separate process. , This was also a factor that impairs productivity.

[0006]

The invention of the present application has been made to solve such a problem. Thus, the invention of the present application is a method of grinding a die groove on a circumferential surface in a carbide ring roll die for rolling, in which a work spindle and a grindstone spindle are arranged in parallel with each other, and Carbide ring roll for rolling as a processing target, and also equipped with a disk-shaped grindstone for die groove processing, which is thinner than the width of the die groove to be processed on the grindstone spindle,
By moving the grindstone spindle in the axial X-axis direction and in the axis-perpendicular Y-axis direction, the die-grooving grindstone brought into contact with the circumferential surface of the ring roll is moved in the widthwise direction of the die groove. The mold groove is moved back and forth in the depth direction to form a predetermined mold groove on the circumferential surface of the ring roll by grinding (claim 1).

In another aspect of the present invention, in claim 1, a plurality of types of grindstones including the grindstone for forming a groove are provided at a plurality of positions axially separated from the grindstone spindle by using the grindstone spindle as a common grindstone spindle. It is mounted on the ring roll, and grinding is performed on the ring roll by using any one of the plurality of types of grindstones based on the movement of the grindstone spindle (claim 2).

According to still another aspect of the present invention, in claim 2, an outer diameter flat grindstone for adjusting the outer diameter of the ring roll is mounted on the grindstone spindle as a grindstone other than the grindstone grindstone. The outer diameter of the ring roll is first measured by the outer diameter flat grindstone, and then the die groove is formed by the die groove forming stone on the same grindstone spindle (claim 3).

Still another invention according to the present application is as follows.
In any one of 3 and 4, the dressing grindstone is arranged in a direction perpendicular to the grindstone mounted on the grindstone spindle within a movement region of the grindstone mounted on the grindstone spindle in the X-axis direction and the Y-axis direction. While the outer peripheral surface of the grindstone mounted on the grindstone spindle and the dressing grindstone are in contact with each other, the grindstone spindle is moved in the X-axis direction, the Y-axis direction, or both directions to sharpen the grindstone mounted on the grindstone spindle,
Dressing such as shape correction is performed (claim 4).

[0010]

As described above, according to the first aspect of the present invention, the grinding stone mounted on the grindstone spindle is brought into contact with the circumferential surface of the ring roll while the grinding stone and the ring roll are rotated. While moving the grinding wheel along the circumferential surface of the ring roll in the width direction of the die groove as the grinding wheel spindle moves in the X-axis direction and the Y-axis direction,
By moving back and forth in the depth direction of the die groove, a die groove having a predetermined cross-sectional shape is formed by grinding. According to the present invention,
By controlling the movement of the grindstone spindle in the X-axis direction and the Y-axis direction, that is, by controlling the movement in the groove width direction and the groove depth direction of the processing grindstone, the die grooves of various sizes and shapes are made the same. It can be processed and formed by using the processing grindstone.

Therefore, according to the present invention, it is not necessary to attach and detach the processing grindstone each time the size or shape of the die groove is changed, thereby reducing the labor and time conventionally required. The productivity can be significantly increased. Further, since it is not necessary to prepare a large number of dedicated grinding wheels for processing, there is an advantage that the space for storage and management thereof can be eliminated.

According to a second aspect of the present invention, a plurality of types of grindstones including a groove-grooving grindstone are mounted on the same grindstone spindle, and one of them is selected for grinding. For example, for roughing according to the present invention. It is possible to efficiently perform the grooving by mounting the whetstone of No. 1 and the whetstone for finishing on the same whetstone spindle and performing processing using them. Of course, other types of grindstones can be attached.

According to the third aspect of the present invention, as one of the plurality of types of grindstones, an outer diameter flat grindstone for adjusting the outer diameter of the ring roll is mounted, and thereby the outer peripheral surface of the ring roll is ground. In the present invention, according to the present invention, without performing the work of exchanging the die groove machining grindstone and the outer diameter flat grindstone, by the rotation and movement of the same grindstone spindle, the outer diameter flattening processing by the outer diameter flat grindstone, It is possible to perform the grooving with the grooving tool for grooving almost simultaneously.

According to a fourth aspect of the present invention, a dressing grindstone is provided in a moving region of the grindstone mounted on the grindstone spindle in the X-axis direction and the Y-axis direction, and the dressing grindstone moves along with the X-axis direction and the Y-axis direction. Dressing such as dressing and shaping of the grindstone mounted on the grindstone spindle is performed, and according to the present invention, dressing such as dressing and shaping is performed without removing the grindstone mounted on the grindstone spindle from the grindstone spindle. It is possible to obtain the effect that work efficiency can be significantly increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 shows a configuration of a preferred apparatus for carrying out the method according to the embodiment of the present invention. In the figure, reference numeral 10 denotes a work spindle rotatably provided, and a carbide ring roll 12 for rolling which is a processing target at a tip end thereof. Are mounted so as to rotate integrally with the work spindle 10.

Reference numeral 14 denotes a table movably provided on the base 16, which is controlled numerically under X-axis and Y-axis directions.
That is, the work spindle 10 is driven in the X-axis direction, which is the axial direction, and the Y-axis direction, which is perpendicular to the X-axis direction.

A grindstone spindle 18 is mounted on the table 14.
Are provided so as to move integrally with the table 14.
Here, the grindstone spindle 18 is arranged in parallel with the work spindle 10 as shown in FIG. 1, and a tip end portion of the grindstone spindle 18 has a cross-sectional shape of the outer peripheral portion which is a curved surface shape and is processed and formed as described later. A disc-shaped grindstone 20 for forming a groove having a thickness smaller than the width of the power groove 28 (see FIG. 3) and an outer diameter surface of the ring roll 12, that is, an outer peripheral surface at a position axially separated from the grindstone 20. The outer diameter flat grindstone 22 that grinds in the direction parallel to the axis is mounted in a state of integrally rotating with the grindstone spindle 18.

A dressing grindstone 24 is disposed on the base 16 in the moving region of the die groove working grindstone 20 and the outer diameter flat grindstone 22 in the X-axis direction and the Y-axis direction. The dressing grindstone 24 rotates integrally with the rotary shaft 26 at the upper end portion of the rotary shaft 26 that rises vertically from the base 16, that is, the direction of the die groove processing grindstone 20 and the outer diameter flat grindstone 22 and exactly 90. It is provided so as to rotate integrally with the rotary shaft 26 in the intersecting direction.

Next, the processing method of this example will be specifically described.
In the method of this example, as shown in FIG. 3A, first, the outer diameter flat grindstone 22 is brought into contact with the outer peripheral surface of the ring roll 12, and then the outer diameter flat grindstone 22 and the ring roll 12 are rotated with respect to each other. Meanwhile, the grindstone spindle 18 is moved in the X-axis direction (see FIGS. 1 and 2), and the outer diameter of the ring roll 12 is set.

Next, as shown in (B), the outer peripheral surface of the thin die-grooving grindstone 20 is brought into contact with the outer peripheral surface of the ring roll 12, and the grindstone spindle 18 is moved in the X-axis and Y-axis directions. The grinding wheel 20 for forming a groove is moved forward in the width direction of the groove, and is moved forward in the depth direction of the groove, and then is moved backward to thereby form a groove having a predetermined shape on the circumferential surface of the ring roll 12. To do.

When the grindstone 20 for forming the groove and the flat grindstone 22 for the outer diameter are clogged or deformed,
As shown in FIG. 4, the outer peripheral surfaces of these grindstones 20 and 22 are brought into contact with the outer peripheral surface of the dressing grindstone 24, and while rotating them in directions different from each other by 90 °, the movement of the grindstone spindle 18 causes By moving the die-grooving grindstone 20 or the outer diameter flat grindstone 22 mounted in the X-axis direction and the Y-axis direction, or in the case of the outer diameter flat grindstone 22, it is translated in the X-axis direction. By doing so, these are sharpened and shaped.

As described above, according to the method of this embodiment, the die groove working grindstone 20 is simultaneously moved along the circumferential surface of the ring roll 12 in the groove width direction and the groove depth direction to obtain a predetermined cross section. The die groove 28 having a desired shape is formed by grinding, and the die groove 28 having a desired cross-sectional shape can be easily formed by strictly controlling the amount of movement of the die groove processing grindstone 20 in the X-axis direction and the Y-axis direction. In addition, it can be processed and formed accurately.

Therefore, according to this embodiment, it is not necessary to attach and detach the grindstone 20 for forming the groove each time the size, shape, etc. of the groove 28 are changed. Time can be reduced and productivity can be increased. In addition, since it is not necessary to prepare many kinds of dedicated grinding wheels, it is possible to eliminate the need for space for storage and management.

Further, in this example, the grindstone 20 for forming the groove is formed.
Together with the outer diameter flat grindstone 22, the same grindstone spindle 18
Since the processing is performed by mounting the ring roll 12 on the outer surface of the ring roll 12, the processing for forming the outer diameter of the ring roll 12 and the processing for forming the die groove 28 are performed by using the corresponding flat grinding stone for outer diameter 22 and die groove processing. It is possible to perform the grinding stones 20 almost simultaneously without removing them.

Further, in the method of this embodiment, the dressing grindstone 24 is provided in the movable area of the die groove working grindstone 20 and the outer diameter flat grindstone 22, and the die grindstones 18 are moved as the grindstone spindle 18 moves. Since dressing such as dressing and shaping of the processing grindstone 20 and the outer diameter flat grindstone 22 can be performed, the dressing grindstone 20 and the outer diameter flat grindstone 22 are individually dressed by the grindstone spindle 18 for dressing. It is not necessary to remove it from the machine and perform the dressing work in a separate step, and the dressing work can be easily performed at the same place as the die groove processing.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, by mounting a grindstone for rough machining of the die groove 28 on the grindstone spindle 18, the die groove 28 can be efficiently processed and formed. In addition, at that time, it is not necessary to detach the roughing grindstone and the finishing grindstone, and there is an advantage that the roughing and the finishing can be performed almost simultaneously only by moving the grindstone spindle 18. In addition, the present invention can be implemented in variously modified modes without departing from the spirit of the invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing a planar configuration of an apparatus suitable for carrying out an embodiment method of the present invention.

FIG. 2 is a perspective view showing a schematic overall configuration of the implementation apparatus of FIG.

FIG. 3 is an explanatory diagram of a main process of an embodiment method of the present invention.

FIG. 4 is an explanatory view of a main process different from that of FIG. 3 of the method according to the embodiment of the present invention.

FIG. 5 is an explanatory view of a method of processing a die groove in a conventional rolling carbide ring roll die.

[Explanation of symbols]

 10 Work Spindle 12 Carbide Ring Roll for Rolling 18 Grinding Stone Spindle 20 Grinding Wheel for Model Grooving 22 Flat Grinding Wheel for Outer Diameter 24 Grinding Wheel for Dress 28 Model Groove

Claims (4)

[Claims] 1. A method for grinding a die groove on a circumferential surface in a carbide ring roll die for rolling, wherein a work spindle and a grindstone spindle are arranged in parallel to each other, and the work spindle serves as a machining target. Carbide ring rolls for rolling, and disc-shaped grindstones for disc-grooving with a thickness smaller than the width of the die groove to be machined are attached to the grindstone spindle, and the grindstone spindle is mounted in the axial X-axis direction and at right angles to the axis. By moving in the Y-axis direction, the die-grooving grindstone brought into contact with the circumferential surface of the ring roll is moved in the depth direction of the die groove while moving in the width direction of the die groove. And a predetermined die groove is formed on the circumferential surface of the ring roll by grinding to form a die groove for a super hard ring roll for rolling. 2. A plurality of types of grindstones including the grindstone for forming a groove as set forth in claim 1, wherein the grindstone spindle is mounted as a common grindstone spindle on the grindstone spindle and at a plurality of axially separated positions. A method of forming a groove for a super hard ring roll for rolling, which comprises performing grinding on the ring roll by using one of the plurality of types of grindstones based on the movement of the grindstone spindle. 3. The outer diameter flat grindstone for adjusting the outer diameter of the ring roll as the grindstone other than the die groove working grindstone according to claim 2, wherein the grindstone spindle is first mounted. After performing the outer diameter of the ring roll with a flat grindstone, die grooving is performed with the die for grooving on the same grindstone spindle. Method. 4. The dressing grindstone according to claim 1, wherein the dressing grindstone is mounted on the grindstone spindle within a movement region of the grindstone mounted on the grindstone spindle in the X-axis direction and the Y-axis direction. Place it in the direction perpendicular to the grindstone,
With the outer peripheral surface of the grindstone mounted on the grindstone spindle and the dressing grindstone in contact with each other, the grindstone spindle is moved in the X-axis direction, the Y-axis direction, or both directions to set the grindstone mounted on the grindstone spindle. A method for forming a groove of a super hard ring roll for rolling, characterized by performing dressing such as shape correction.