JP3317418B2 - Disc cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cutter for crushing and excavating rock, and more particularly, to an improvement in the shape and embedding form of a drilling tip so that a tool life can be extended.

[0002]

2. Description of the Related Art Conventionally, as this kind of disk cutter, for example, as disclosed in Japanese Patent Publication No. 53-30642, a segment- shaped excavating tip is arranged in a circumferential direction to form a cutting edge portion. , as disclosed in U.S. Pat. No. 3,430,718, the cutting edge portion, and that spaced arranged cylindrical excavation tip, Japanese Utility Model 61-141395
As disclosed in Japanese Patent Publication No.
In addition, a second carbide tip is embedded in the inclined surface of the cutting edge.
Are known. Also, Japanese Patent Publication No. 45-7644
As disclosed in the official gazette, long sides are
Square chips are alternately mounted at equal intervals
Noya, as disclosed in JP-A-63-125797
Behind the wedge-shaped tip, a somewhat smaller cylindrical portion is formed.
Those equipped with drilling chips are known.

[0003]

SUMMARY OF THE INVENTION However, the first
The disk cutter disclosed in the publication has a problem in that if one of the excavation chips is chipped or peeled off during the crushing of the rock, the chip in the next rotation direction is continuously chipped off. Also, the second, third and fifth
In the disc cutter disclosed in the official gazette, since the wear amount of the cutting base material constituting the cutting edge portion is larger than the wear amount of the cutting tip, a phenomenon in which the cutting tip jumps out of the base material surface is observed. Then, there was a problem that the drilling chips dropped off from the base material. In addition, 4
In the disk cutter disclosed in the second publication,
Because of the small thickness of the tip,
Therefore, there was a problem of dropping out early.

[0004] In view of the above, in the present invention, the tool life is improved by improving the shape and embedding form of the drilling tip.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and has a cutting tip embedded in a cutting edge portion.
Consists of elliptical or V-shaped shapes that have a size relationship
Is applied, and a V-shaped head is formed on its upper surface,
A convex leg is formed on the bottom surface of the
The ring consists of alternating drilling tips in the circumferential direction.
When implanted, a V-shaped protrusion is formed by the sharp head.
The formed cutting edge part is configured and is orthogonal to the circumferential direction
In the axial direction, the excavation distributed on the basis of the sharp head
The change in the length of the tip allows the entry and exit of unevenness having a symmetrical shape to be formed . Claims
In the invention according to Item 2, the excavation tip has the same size.
Have a cross shape, an L shape, a T shape, an S shape,
It has a rectangular or trapezoidal shape, and the cutting is axial
In the direction, the distribution is based on the sharp head of the drilling tip.
Irregular ingress and egress due to the change in the length of the drilled tip
It is designed to be composed. In this case, the excavation
The chips are adjacent to each other in the circumferential direction.
Length that is smaller than the circumferential length of the drilling tip
May be separated from each other.

[0006]

In the disk cutter according to the present invention, when a drilling tip is embedded, irregularities enter and exit in an axial direction perpendicular to the circumferential direction.
Therefore, even if the balance of the excavation resistance applied to both sides of the cutting edge portion is different, it can cope with this. Also,
Drilling tip shedding is also reduced compared to conventional disc cutters due to its axial extent.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a disk cutter according to the present invention .

In FIG. 1, reference numeral 1 denotes a cutter of a disk cutter.
It is attached to the attachment shaft 2 via a bearing structure (not shown) composed of a ball, a seal, and the like. The cutter ring 1 has a two-mountain configuration as shown in the figure, and has a V-shaped protruding cutting edge for crushing and excavating rock, and a drilling tip having a sharp head 3 made of a cemented carbide or the like in the circumferential direction thereof. 4
Is embedded. In this case, the embedding of the excavation tip 4 is performed by means such as brazing or press fitting. And
These excavation chips 4 are embedded so that when the sharp head 3 forms a vertex line with reference to the circumferential direction, irregularities enter and exit in an axial direction that is orthogonal to the excavation chips. .

[0009] That is, in the case of FIGS. 1 and 2, drilling tip 4 is a plan view of that, an oval which was a basic shape, the two elliptical tip 4A in the magnitude relation, 4a is incorporated ing. In addition, the surface treatment is performed on a two-step inclined side surface portion following the one cutting edge portion in the cutting by a filler metal material 5 made of a thermal spray material or the like. This takes into consideration the wear resistance of the cutter ring 1.

Thus, the disk cutter of the present invention
It is attached to a cutter device (not shown) to crush and excavate rock. FIG. 3 shows a V-shaped excavating tip having the same size relationship as the embedding form of the excavating tip 4.
4B and 4b are illustrated. However, the present invention can also be applied to a case where a certain basic shape having the same size is provided. FIGS. 4A and 4B illustrate a case where the sharp head 3 has a + -shape in plan view in the vertex direction. In this case, the bottom of the sharp head 3 is provided with a convex leg 6 for preventing falling off. Note that this leg 6
Is formed integrally with the drilling tip 4, but a steel material may be inserted into a blind mounting hole provided in the drilling tip 4 and brazed.

As an example other than the + shape, FIG.
(a)-(e), L-shaped, T-shaped, S
A drilling tip 4 having a basic shape of a character, a rectangle, or a trapezoid can be applied. Applying such a drilling tip 4
As a result, the cutting edge of the cutting 1
Each is divided in the axial direction based on the sharp head 3
Depending on the length of the drilling tip 4
You. That is, the L-shaped excavation tip shown in FIG.
4 connects a pair of excavating chips 4 and sets a horizontal portion at both ends.
The projections are made to project on the side and the unevenness is made in and out. Only
However, the arrangement is not limited to this, and the horizontal parts are alternately projected.
May be placed. In addition, the T-shaped excavation shown in FIG.
Chip 4, X-shaped and a modification of the T-shape, in FIG. 5 (c)
As the S-shaped carbide tip 4 shown, a symmetrical f-shape, an engraved shape, a king-shaped shape, or the like can be applied as a modification of the S-shaped shape. FIG. 5 (d) shows a rectangular shape as a basic shape.
Drilling tip 4, also in this case, based on the sharp head 3.
And the unevenness in and out according to the length
Is configured. FIG. 5E shows a trapezoid as a basic shape.
Drilling tip 4 is illustrated, in this case a sharp head
3 is parallel to the two sides that are in a horizontal relationship
Is what it is. Then, with the sharp head 3 as the reference
For example, irregularities can enter or leave
Is configured. However, the T-shape shown in FIG.
Like the drilling tip 4, the sharp head 3 is in a horizontal relationship
It is bilaterally symmetric so that it is perpendicular to two sides
Ingress and egress of irregularities may be configured.

In this embodiment, the form in which the excavation tips 4 are in contact with each other in the circumferential direction of the apex line portion is exemplified. In this case, the separation length is equal to the drilling tip 4
Must be smaller than the length in the circumferential direction. The reason for this is that if the separation length is large, the amount of wear of the base material at the cutting edge increases, which causes a problem.

[0013]

According to the present invention, as described above, the excavating tips 4 embedded in the cutting edge portion have irregularities in and out in the width direction orthogonal to the circumferential direction. Therefore, even if the balance of the excavation resistance is lost, they interfere with each other to enhance the crushing effect and perform a good excavation operation. As a result, there is an advantage that the falling off of the excavation tip 4 is reduced, and an improvement in tool life can be expected.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a disc cutter of the present invention,

2 (a) is a front view, FIG. 2 (b) is a bottom view,

FIG. 3 is a partially enlarged front view showing a modification of the embedding form of the drilling tip,

FIG. 4 is an explanatory view showing another modification of the excavation tip, and FIG.
Is a front view, (b) is a bottom view,

FIG. 5 is an explanatory view showing another embodiment of the embedding form of a drilling tip, wherein (a) is an L-shape, (b) is a T-shape, (c) is an S-shape,
(d) is a front view with a basic shape of a rectangle and (e) is a trapezoid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cuttering 2 Mounting shaft 3 Sharp head 4 Drilling tip 5 Filling material 6 Leg

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E21B 10/50 E21B 10/12 E21D 9/10

Claims (4)

(57) [Claims] The method according to claim 1] cutter ring 1 forming the disk-shaped cutting edge portion that form the V-shaped projections in the circumferential direction consists, moreover this
In a disc cutter in which a cutting tip 4 having a sharp head 3 is embedded in a vertex angle direction of a cutting edge portion of the cutting edge, the cutting tip 4 is formed from an elliptical shape having a size relationship.
Drilling tips 4A, 4a or V-shape with similar size relation
Drilling chips 4B, 4b are applied,
The V-shaped head 3 is formed in the portion,
Is formed so that a convex leg 6 is formed, and the cutting 1 is provided with the excavating tip 4A, 4a or the excavating tip 4A.
When the chips 4B and 4b are alternately embedded in the circumferential direction,
The cutting edge portion forming a V-shaped projection by the sharpened head 3 is structured.
In the axial direction perpendicular to the circumferential direction
Drilling chips 4A distributed on the basis of 3
4a or digging tip 4B, 4b, symmetrical depending on length change
A disc cutter characterized in that it has an ingress and egress of irregularities exhibiting the following . 2. The drilling tip 4 has the same size.
Then, in plan view, the basic shape is a cross, an L-shape, and a T-shape.
The cutter is shaped like a letter, an S, a rectangle or a trapezoid.
The ring 1 has a sharp head in the axial direction of the drilling tip 4.
Change in length of drilling tip 4 distributed based on 3
2. The method according to claim 1 , wherein the ingress and egress of the irregularities are constituted by the irregularities.
Disc cutter as described. 3. The drilling tip 4 is provided with an adjacent drilling chip.
Flop 4 to each other, circumferentially contact touch to that claim 1 or claim 2 disc cutter according to each other. 4. The drilling tip 4 is provided with an adjacent drilling chip.
Are larger than the circumferential length of the drilling tip 4 in the circumferential direction.
3. The method according to claim 1 or 2, wherein the distance is small.
Disc cutter as described.