JP2000246704A - Cutting device with rotary blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the outer peripheral shape of a rotating cylinder with mounted rotary blades to be efficiently formed. SOLUTION: In this cutting device 1 with rotary blades which works to cut using the rotary blades 2, the outer periphery of a rotating cylinder with the mounted rotary blades 2 is annularly formed of a flat plane P and a protruded part T projecting outwardly beyond the flat plane arranged sequentially, and a freely advancing/receding adjusting screw 6 is fitted into the protruded part T. Further, the projecting face of the protruded part T into which the adjusting screw 6 is fitted and the end face of a protruded part on the opposite side are flush with the flat plane P. In addition, the lower faces of the rotary blades 2 coming into contact with the flat plane P are formed to be flat, and the rotary blades 2 are fitted into the rotating cylinder by bringing the lower faces of the rotary blades 2 into the flat plane P and at the same time, attaching the rotary blades 2 to the flat plane P with bolts 7 through slots formed in the rotary blades 2. In this case, the end faces of the rotary blades 2 on the opposite side to the edges of the rotary blades 2 are brought into contact with the adjusting screws 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a rotary blade cutting device,
The present invention relates to a rotary blade cutting device capable of efficiently forming an outer peripheral shape of a rotary drum to which a rotary blade is attached.

[0002]

2. Description of the Related Art In the case of a conventional rotary blade cutting device, for example, a rotary plane cylinder, as shown in FIG. The blade B is attached, and the blade C is tightened on the plane with the bolt D (the JPO publication published on December 26, 1977.
(See page 231 of the book of conventional techniques (woodworking machines)).

[0003]

However, in the above-described apparatus, the end face E of the blade C opposite to the cutting edge is not restrained, and the blade C is only tightened by the bolt D. In order to increase the strength, the diameter of the bolt D must be increased, and the shape of the blade C is correspondingly increased. The present invention provides a rotary blade cutting device that eliminates the above-described problems by efficiently forming the outer peripheral shape of a rotary drum to which the rotary blade is attached.

[0004]

To achieve the above object, a rotary blade cutting device according to claim 1 is a rotary blade cutting device for cutting with a rotary blade, wherein the rotary blade to which the rotary blade is attached is mounted. The outer circumference is formed by sequentially forming a flat surface and a protruding portion projecting outward from the flat surface in an annular shape, and an adjusting screw that is movable forward and backward is attached to the protruding portion, and the projecting portion to which the adjusting screw is attached is attached. The end surface of the protruding portion opposite to the protruding surface of the rotary blade is flush with the flat surface, and the lower surface of the rotary blade abutting on the flat surface is formed flat, and the rotary blade is attached to the rotary drum. Abuts the lower surface of the rotary blade on the flat surface, and attaches the bolt to the flat surface via a long hole provided in the rotary blade with a bolt, and the end surface of the rotary blade on the opposite side of the blade edge of the rotary blade. Is in contact with the adjustment screw That.

[0005] The rotary blade cutting device according to claim 2 is
A rotary blade cutting device that performs cutting with a rotary blade, wherein the outer periphery of the rotary drum to which the rotary blade is attached is formed by sequentially forming a flat surface and a projecting portion that protrudes outward from the flat surface in an annular shape, An adjustable screw that can move forward and backward is attached to this protrusion,
An end surface of the protruding portion opposite to a protruding surface of the protruding portion to which the adjustment screw is attached is flush with the flat surface,
The lower surface of the rotary blade that abuts on the flat surface is formed flat, and the rotary blade is attached to the rotary drum while the lower surface of the rotary blade abuts on the flat surface and provided on the rotary blade. The rotary blade is attached to the flat surface with a bolt through a long hole, and the end surface of the rotary blade opposite to the blade edge of the rotary blade abuts on the adjusting screw. The blade edge of the rotary blade is parallel to the longitudinal direction of the rotary shaft, and the blade edge of the rotary blade of one of the adjacent rotary drums and the blade edge of the rotary blade of the other adjacent rotary drum are aligned with each other. It is something that is shifted.

[0006] The rotary blade cutting device according to claim 3 is characterized in that:
In the rotary blade grinding device according to claim 1 or 2,
The tip angle θ ₁ of the rotary blade = 90 ° −the clearance angle θ ₂ formed to avoid contact between the surface to be cut and the rotary blade−the rake angle θ ₃ formed between the surface to be cut and the rotary blade, θ ₁ > 0, θ ₂ >
Θ ₁ , θ ₂ , and θ ₃ are set so that 0, θ ₃ > 0.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary blade cutting device according to one embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a rotary blade cutting device for grinding with a rotary blade 2 rotating by a motor (not shown). For example, for example, a concrete residue on the upper surface of a mold is cut by the rotary blade 2. Concrete removal equipment for removing concrete, rotary plane equipment for woodworking machines, etc. In addition, the arrow shown in FIG. 7 shows the rotation direction of the rotary blade 2.

[0008] Rotation cylinders rotary blade 2 is attached, in this embodiment, for example, a plurality, rotating cylinder K _1, rotating cylinder K _2,
The rotary cylinder K ₃ to the rotating shaft 3, for example, key provided on the rotary shaft 3 - is attached by inserting the key 4 into the groove 31. In the attached state, the cutting edge 21 of the rotary blade 2 is parallel to the longitudinal direction of the rotary shaft 3 (see FIGS. 1, 3, 4, 5, and 7).

Each of the outer circumferences of the rotating drum K ₁ , the rotating drum K ₂ , and the rotating drum K ₃ sequentially includes a flat surface P and a protruding portion T protruding outward from the flat surface P. In the embodiment, as shown in FIG. 3, FIG. 4, FIG. 5, and FIG.
Flat surface P, protrusion T, flat surface P, protrusion T, flat surface P,
The protrusion T, the flat surface P, and the protrusion T are sequentially formed to form an annular shape.

An adjustable screw (for example, a bolt) 6 is attached to each of the plurality of protrusions T so as to be screwed into a female screw TM provided on the protrusion T. The adjustment screw (for example, bolt) 6 is provided with a nut 61 for preventing the adjustment screw (for example, bolt) 6 from moving. The end surface N of the protruding portion T opposite to the protruding surface M of the protruding portion T to which the adjusting screw 6 is attached is flush with the flat surface P.
Also, the lower surface 22 of the rotary blade 2 that contacts the flat surface P is formed flat, and the lower surface 22 is formed in parallel with the upper surface 23 on the opposite side,
The rotary blade 2 has a cutting edge angle θ ₁ (a straight line connecting the cutting edge 21 and the upper surface 23,
(Angle formed by a straight line connecting the cutting edge 21 and the lower surface 22).

The rotary blade 2 is attached to the rotary drum K ₁ , the rotary drum K ₂ , and the rotary drum K ₃ , by contacting the lower surface 22 of the rotary blade 2 with the flat surface P and forming a slot formed in the rotary blade 2. Attachment to flat surface P by bolt 7 via 24 (more desirably,
The washer W is interposed. ), The end face 25 of the rotary blade 2 opposite to the cutting edge 21 of the rotary blade 2 is brought into contact with the adjusting screw 6. The bolt 7 is screwed into a female screw TM provided on the rotary drum K ₁ , the rotary drum K ₂ , and the rotary drum K ₃ .

Therefore, according to the rotary blade cutting device 1,
The lower surface 22 of the rotary blade 2 is connected to the rotary drum K ₁ , the rotary drum K ₂ , and the rotary drum K
_{3 and} a rotary cylinder K ₁ , a rotary cylinder K by a bolt 7 through an elongated hole 24 provided in the rotary blade 2.
_2, mounted on the flat plane P of the rotary cylinder K _3, the cutting edge of the rotary blade 2
The end face 25 of the rotary blade 2 on the side opposite to 21 is brought into contact with the adjusting screw 6 to restrict the movement from the cutting edge 21 of the rotary blade 2 toward the end face 25 on the opposite side to the cutting edge 21 to easily rotate the rotary blade 2. Moreover, it can be firmly attached, and furthermore, the rotating drum K ₁ and the rotating drum K
_2, the outer periphery of the rotating cylinder K ₃ has a flat surface P, the form from a flat surface P sequentially annular and protruding portions T that protrudes outward, the projecting surface M of the projection T of adjustment screw 6 is attached Since the end face N of the projecting portion T on the opposite side is the same as the flat surface P, it forms a part of the flat surface P to efficiently cover the outer circumferences of the rotary drum K ₁ , the rotary drum K ₂ , and the rotary drum K _3. Can be formed.

Further, as shown in FIGS. 1 to 5, one of the adjacent rotating drum (e.g., rotary cylinder K ₁₎ other rotating barrel adjacent to the cutting edge 21 of the rotary blade 2 (for example, rotating cylinder K ₂ 2), the cutting edge 21 of the rotary blade 2 is not aligned on a straight line (in the present embodiment, the adjacent rotary drums are shifted by 30 °). Thus, the rotary blade 2 can be driven.

In particular, as shown in FIG.
₁ = 90 ° −Escape angle θ ₂ formed to avoid contact between the cut surface 100 and the rotary blade 2 −The cut surface 100 and the rotary blade 2
The rake angle θ ₃ formed by the following equation, θ ₂ > 0, θ ₃ > 0,
It is set so that θ ₁ > 0. In this embodiment, the cutting edge angle θ ₁ = 77 °, the clearance angle θ ₂ = 10 °, and the rake angle θ ₃
= 3 °. Therefore, the cutting edge 21 of the rotary blade 2 is
Since the two blades are ground toward the upper surface 23 and the lower surface 22 of the rotary blade 2 to form a bevel angle θ ₁ , compared with a single blade ground toward the upper surface 23 of the rotary blade 2 or the lower surface 22 of the rotary blade 2,
Can take a large included angle theta _1, it is possible to obtain a robust rotary blade of the cutting edge.

The outer periphery of the rotary drum according to the present invention is not limited to the one shown in FIG. 7, and for example, as shown in FIG. 10, a flat surface P, a protruding portion T, a flat surface P, a protruding portion T, and a flat surface. P, a protruding portion T, a flat surface P, a protruding portion T, a flat surface P, a protruding portion T, a flat surface P, and a protruding portion T are sequentially formed to form an annular shape.

[0016]

According to the rotary blade grinding device of the first aspect, the surface of the rotary blade is brought into contact with the flat surface of the rotary drum, and the flat surface of the rotary drum is bolted through a long hole provided in the rotary blade. Surface, and the end face of the rotating blade opposite to the cutting edge of the rotating blade is brought into contact with the adjusting screw to restrain the movement from the cutting edge of the rotating blade toward the end surface opposite to the cutting edge, thereby easily and firmly. Further, the outer periphery of the rotating drum is formed with a flat surface and a protruding portion protruding outward from the flat surface in an annular shape in order, and an opposite side of the protruding surface of the protruding portion to which the adjusting screw is mounted is provided. Since the end surface of the protrusion is the same as the flat surface,
The outer periphery of the rotating drum can be efficiently formed by forming a part of the flat surface.

According to the rotary blade grinding device of the second aspect, in addition to the effects of the first aspect of the present invention, in addition to the cutting edge of the rotary blade of one adjacent rotary drum and the other rotary drum adjacent to the rotary blade. Because the blade edge of the rotary blade is not aligned in a straight line,
The rotating blade can be driven by reducing the resistance received by the cutting edge of the rotating blade.

According to the rotary blade grinding device of the third aspect, in addition to the effects of the first and second aspects of the present invention, the edge of the rotary blade is directed toward the upper and lower surfaces of the rotary blade. Because the two blades are ground to form a bevel angle, a larger bevel angle can be obtained compared to a single blade ground toward the upper surface of the rotary blade or the lower surface of the rotary blade, and a strong rotary blade with a sharp blade edge is obtained. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a rotary blade grinding device according to one embodiment of the present invention.

FIG. 2 is a schematic front view of the rotary blade grinding device of FIG. 1;

FIG. 3 is a schematic sectional view taken along line XX of FIG. 2;

FIG. 4 is a schematic sectional view taken along line YY of FIG. 2;

FIG. 5 is a schematic sectional view taken along the line ZZ in FIG. 2;

FIG. 6 is a schematic partially exploded perspective view showing a part of the rotary blade grinding device of FIG. 1 in an exploded manner.

FIG. 7 is a schematic cross-sectional view in a direction transverse to a rotation axis of the rotary blade grinding device of FIG. 1;

FIG. 8 is a schematic partially enlarged sectional view showing a part of FIG. 1 in an enlarged manner.

FIG. 9 is a schematic sectional view of a state before the rotary blade of FIG. 7 is attached.

FIG. 10 is a schematic sectional view of a rotary blade grinding device of another embodiment different from FIG.

FIG. 11 is a schematic sectional view of a conventional rotary blade grinding device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rotary blade cutting device 6 Adjusting screw 7 Bolt 22 Lower surface 25 End surface of rotary blade K ₁ Rotating drum M Projecting surface of projecting portion N End surface of projecting portion P Flat surface T Projecting portion

Claims (3)

[Claims] 1. A rotary blade cutting device for cutting with a rotary blade, wherein an outer periphery of a rotary drum to which the rotary blade is attached is formed in a ring shape with a flat surface and a protruding portion projecting outward from the flat surface. An adjusting screw that is movable forward and backward is attached to the projecting portion, and an end surface of the projecting portion opposite to the projecting surface of the projecting portion to which the adjusting screw is attached is flush with the flat surface, The lower surface of the rotary blade abutting on the flat surface is formed flat, and the mounting of the rotary blade on the rotary drum is provided on the rotary blade while the lower surface of the rotary blade abuts on the flat surface. A rotary blade cutting device, wherein the rotary blade is attached to the flat surface with a bolt through a long hole, and an end surface of the rotary blade opposite to a blade edge of the rotary blade is in contact with the adjusting screw. 2. A rotary blade cutting device for cutting with a rotary blade, wherein an outer periphery of a rotary drum to which the rotary blade is attached is formed in a ring shape with a flat surface and a protruding portion projecting outward from the flat surface. An adjusting screw that is movable forward and backward is attached to the projecting portion, and an end surface of the projecting portion opposite to the projecting surface of the projecting portion to which the adjusting screw is attached is flush with the flat surface, The lower surface of the rotary blade abutting on the flat surface is formed flat, and the mounting of the rotary blade on the rotary drum is provided on the rotary blade while the lower surface of the rotary blade abuts on the flat surface. Attached to the flat surface by a bolt via a long hole, the end face of the rotary blade opposite to the blade edge of the rotary blade abuts on the adjusting screw, a plurality of rotary drums, the plurality of rotary drums are rotary shafts The rotary blade is attached to the front The rotation is parallel to the longitudinal direction of the rotation axis, and the edge of the rotary blade of one of the adjacent rotary drums and the edge of the rotary blade of the other adjacent rotary drum are not aligned on a straight line but are shifted. Blade cutting equipment. 3. A cutting edge angle θ _{1 of the} rotary blade = 90 ° −a clearance angle θ ₂ − formed to avoid contact between the surface to be cut and the rotary blade.
A rake angle theta ₃ formed by the rotary blade and the cutting surface, theta _{1
> 0, θ 2> 0,} θ 3> 0 and becomes as θ _1, θ _2, θ
_3. The rotary blade grinding device according to claim 1, wherein ₃ is set.