JPH11262864A - Grinding wheel device for cutting steel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding wheel device for cutting a steel material, on which a grinding wheel is easily mounted and fixed by fastening one bolt therein. SOLUTION: A grinding wheel device for cutting a steel material includes a rotationally driving shaft 10, a grinding wheel holder 16 integrally rotated therewith, a grinding wheel 30 for cutting a steel material superposed on the flange face 22 of the grinding wheel holder 16, an annular and recessed nut housing 26, a nut 28 threaded to a male screw 14 at the end of the rotationally driving shaft 10, a grinding wheel presser 34 disc-shaped and fastened and fixed at its center to the end face of the rotationally driving shaft 10 with one bolt 36 for fixing the grinding wheel 30, and a locking pin 40 passing through an engagement hole 42 in the grinding wheel 30 and fitting into a pin hole 44 in the grinding wheel presser 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone device for cutting steel materials.

[0002]

2. Description of the Related Art Conventionally, a steel material set at a predetermined position is cut by moving a disk-shaped grindstone forward while rotating it. As described above, when the steel material is cut using the grindstone, the cut end surface can be finished more clearly than when the steel material is cut using the shearing device.

FIG. 5 shows an example of a conventional grindstone device. In the figure, reference numeral 200 denotes a rotary drive shaft, and reference numeral 202 denotes a cylindrical grindstone holder having a flange 204. The grindstone holder 202 is fixed to the rotary drive shaft 200 in a state of being shrink-fitted to the rotary drive shaft 200 and integrally rotating therewith.

Reference numeral 206 denotes a retaining member for the grindstone holder 202, which is fastened and fixed to the distal end surface of the rotary drive shaft 200 by a fastener. Numeral 208 denotes a disk-shaped grinding wheel which is fitted into the grinding wheel holder 202 at the center hole and is superimposed on the flange 204 of the grinding wheel holder 202, specifically, the flange surface 212, and in this state, the grinding wheel presser 2
It is pressed and fixed by 10.

More specifically, the flange 2 of the grindstone holder 202
The grinding wheel 208 is fixed to the rotary drive shaft 200 via the grinding wheel holder 202 and the grinding wheel holder 210 by being tightened by tightening the bolts 214 with the grinding wheel holder 210. Here, the bolts 214 are provided at six positions in the circumferential direction, and function to uniformly tighten the grindstone 208 in the circumferential direction and transmit the rotational driving force from the rotary drive shaft 200 to the grindstone 208.

[0006]

However, in the case of the conventional grindstone apparatus shown in FIG. 5, when it is necessary to replace the grindstone 208, the bolts 214 are removed by rotating six bolts 214 one by one. It is necessary to set the grindstone 208 and then rotate and tighten the bolts 214 one by one again, and the work for that is troublesome.
The work takes a lot of time and effort, and the whetstone 2
There was a problem that the attachment / detachment of the 08 could not be performed quickly.

As described above, it is necessary to fix the grindstone 208 by using a large number of bolts 214 in the conventional grindstone device because the retaining member 206 is attached to the tip end surface of the rotary drive shaft 200, so that the grindstone holder 210 is fixed. Into a ring shape, and the flange 2
04 so that the grindstone 208 is sandwiched with the
This is because it was necessary to fix 10 to the grindstone holder 202.

[0008]

The invention of the present application has been made to solve such a problem. Thus, the steel material cutting grindstone device of the present invention comprises: (a) a rotary drive shaft;
(B) a grinding wheel holder having a cylindrical shape with a flange, which is fitted and fixed to the rotary drive shaft so as to rotate integrally therewith, and which has an annular projecting portion projecting from the flange surface; A grinding wheel for cutting a steel material which is fitted into the annular projection of the grinding wheel holder at the center hole and is superimposed on the flange surface of the grinding wheel holder; An annular and concave nut receiving portion formed on the surface and around the outer peripheral surface of the rotary drive shaft; and A nut for preventing the whetstone holder from coming off the rotary drive shaft;
A grinding wheel presser which has a disc shape, is fastened and fixed to the tip end surface of the rotary drive shaft with a single bolt at a central portion, and sandwiches the grinding wheel with a flange surface of the grinding wheel holder at an outer peripheral portion; (G) a plurality of locking pins provided on the flange and in the circumferential direction so as to protrude from the flange surface of the grinding wheel holder, and penetrate through the engagement holes of the grinding wheel and fit into the pin holes of the grinding wheel holder. It is characterized by having.

[0009]

As described above, the grindstone device of the present invention forms an annular and concave nut receiving portion around the outer peripheral surface of the rotary drive shaft in the grindstone holder, while forming the nut receiving portion on the outer peripheral end of the rotary drive shaft. A male screw is formed, a nut is screwed into the male screw, and this is housed in the nut housing to prevent the whetstone holder from coming off from the rotary drive shaft. It is fastened and fixed to the tip surface of the rotary drive shaft with one bolt, and the rotational drive force from the grindstone holder to the grindstone is transmitted by a plurality of locking pins provided on the flange of the grindstone holder and in the circumferential direction. That's what I did.

That is, the present invention is such that the fixing of the grindstone and the transmission of the rotational driving force are shared between the bolt and the retaining pin. In the case of the grindstone device of the present invention, it is necessary to replace the grindstone. At times, the whetstone can be detached simply by removing or screwing in one bolt at the center of the grindstone holder, and the whetstone can be quickly attached and detached in a short time and with a small amount of labor. In addition, when the grindstone is mounted, the rotational driving force from the grindstone holder can be satisfactorily transmitted to the grindstone via the plurality of locking pins.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 4 shows a cutting apparatus using the steel material cutting grindstone device of the present invention, in which 30 is a grindstone,
50 holds the grindstone 30 rotatably and the grindstone 3
This is a rotary drive unit provided with a motor (not shown) for rotating 0. The rotary drive unit 50 is hung by the frame 52 and is movable in the left-right direction in the figure under the guidance of the guide mechanism.

Reference numeral 54 denotes a roller, and reference numeral 56 denotes a motor for driving the roller 54 to rotate. A plurality of rollers 54 are arranged in the depth direction in the figure, and a table is constituted by the rollers 54. A steel material 58 is supported on the rollers 54, that is, on the table in a mounted state. Here, the steel material 58 can be cut by rotating the grindstone 30 and moving the rotation drive unit 50 leftward in FIG.

FIG. 1 shows a grinding wheel device for cutting steel material according to the present embodiment. Reference numeral 10 denotes a rotary drive shaft of the grinding wheel device for cutting steel material, and a female screw hole 12 is formed at the center of the tip surface. A male screw 14 is formed on the outer peripheral surface.

A cylindrical grindstone holder 16 having a flange 18 is shrink-fitted to the outer peripheral surface of the rotary drive shaft 10 so as to rotate integrally therewith. Here, the transmission of the rotational driving force from the rotary drive shaft 10 to the grindstone holder 16 is performed based on the engagement between the key 20 provided on the rotary drive shaft 10 and the key groove provided on the grindstone holder 16.

An annular protrusion 24 is formed on the grindstone holder 16 so as to protrude from the flange surface 22.
Further, a recessed and annular nut housing 26 is formed inside the annular projection 24 and around the outer peripheral surface of the rotary drive shaft 10. Then, the nut 2 is stored in the nut receiving portion 26.
8 are accommodated. The nut 28 is screwed into the external thread 14 on the outer peripheral surface of the tip of the rotary drive shaft 10 to prevent the grinding wheel holder 16 from coming off the rotary drive shaft 10.

Reference numeral 30 denotes a diameter dimension D (D = 915 in this example).
(mmφ) is a disc-shaped grindstone that is fitted to the annular protrusion 24 of the grindstone holder 16 at the center hole 32 and overlaps the flange surface 22 of the grindstone holder 16.

Numeral 34 denotes a disk-shaped grindstone holder, which is fastened and fixed to the tip end surface of the rotary drive shaft 10 by a single bolt 36 at the center. Thus, the grindstone 30 is sandwiched between the grindstone holder 34 and the flange 18 of the grindstone holder 16, and is fixed to the rotary drive shaft 10 via the grindstone holder 16 so as to be integrally rotated. Here, the bolt 36 is inserted into an insertion hole 38 formed in the grindstone holder 34.
And screwed into the female screw hole 12 formed at the center of the distal end surface of the rotary drive shaft 10.

The grinding wheel holder 16 has the flange surface 22
Six locking pins 40 are fixed to the outer peripheral portion, specifically, the flange 18 so as to protrude from the engaging holes 4 formed in the grindstone 30.
2 and is fitted into the pin hole 44 of the grindstone retainer 34 (see FIG. 3).

Based on the engagement between the locking pin 40 and the engagement holes 42 and the pin holes 44, the rotation driving force is transmitted from the grinding wheel holder 16 to the grinding wheel 30, and further, the rotation driving force is transmitted to the grinding wheel presser 34. Is transmitted.

In the case of the grindstone device for cutting steel material of this embodiment, the grindstone 3
When it is necessary to replace the whetstone 0, the whetstone 30 can be easily removed simply by removing one bolt 36 as shown in FIG.
Can be removed from the grindstone holder 16. Specifically, the bolt 36 is inserted into the female screw hole 1 on the distal end face of the rotary drive shaft 10.
2, the grindstone holder 34 can be removed, and the grindstone 30 can be removed from the locking pin 40 by pulling it out.

Conversely, when the grindstone 30 is mounted, the center hole 32 is fitted to the annular projection 24 of the grindstone holder 16 while being fitted to the six locking pins 40 in the engagement holes 42 of the grindstone 30. Then, the grindstone 30 is fixed by screwing the bolt 36 onto the rotary drive shaft 10 at the center thereof while fitting the grindstone retainer 34 to the locking pin 40 in the pin hole 44 and overlapping the flange surface 22 with the flange surface 22. it can.

As described above, in the case of the grindstone device for cutting steel material of the present embodiment, the grindstone 30 can be attached and detached only by screwing or removing one bolt 36, and therefore, the grindstone 30 can be quickly and quickly mounted with a small amount of labor. Desorption work can be performed. On the other hand, when the grinding wheel is mounted, the grinding wheel holder 1
6 can be transmitted to the grindstone 30 via the plurality of locking pins 40 in a favorable manner.

Although the embodiment of the present invention has been described in detail, this is merely an example, and the present invention can be configured in variously modified forms without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a steel material cutting wheel device according to an embodiment of the present invention.

FIG. 2 is an exploded view of each member of FIG. 1;

FIG. 3 is a front view of the steel material cutting grindstone device of FIG. 1;

FIG. 4 is a view showing a cutting device including the steel material cutting wheel device of FIG. 1;

FIG. 5 is a view showing an example of a conventional steel material cutting wheel device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotation drive shaft 14 Male screw 16 Grindstone holder 18 Flange 22 Flange surface 24 Annular protruding part 26 Nut accommodating part 28 Nut 30 Grindstone 32 Center hole 34 Grindstone holder 36 Bolt 40 Lock pin 42 Engagement hole 44 Pin hole

Claims (1)

[Claims] (1) A rotary drive shaft and (B) a cylindrical shape with a flange, which is fitted and fixed to the rotary drive shaft so as to rotate integrally therewith, and has an annular projection protruding from the flange surface. A grinding wheel for cutting steel material, which has a disk shape with the grinding wheel holder, is fitted into the annular projection of the grinding wheel holder at the center hole, and is superimposed on the flange surface of the grinding wheel holder; and (d) the grinding wheel. An annular and recessed nut receiving portion formed on a surface of the holder on the front end side of the rotary drive shaft and around the outer peripheral surface of the rotary drive shaft; and (e) the rotary drive shaft accommodated in the nut receiving portion. A nut is screwed onto a male screw at the tip to prevent the grinding wheel holder from coming off from the rotary drive shaft, and (f) forms a disc shape. Fastened and fixed with bolts A grindstone holder for holding the grindstone together with the flange surface of the grindstone holder at a portion thereof; And a locking pin that penetrates through and inserts into a pin hole of the grindstone retainer.