JPH1157517A - Crushing rotary blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the service life of an assembly of a rotary blade to be mounted in a crusher for crushing the bulky refuse discharged from households and industrial waste. SOLUTION: The crushing blade formed along the periphery of a tool main body 2 is composed of a main crushing blade 5 and an auxiliary crushing blade 11 in two stages. Namely, the auxiliary crushing blade 11 consisting of an alloy steel is arranged slightly within the tool in the width direction and slightly outside in the peripheral direction with respect to the main crushing blade 5 formed by a hard tool material 6, hence the impact on the material to be crushed is shared with the auxiliary crushing blade 11 excellent in chipping resistance, and the material is substantially sheared by the main crushing blade 5 excellent in wear resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the treatment of oversized garbage and industrial waste discharged from homes, and a rotary blade for crushing mounted on a crusher for crushing performed as a pre-process of incineration of garbage. About.

[0002]

2. Description of the Related Art Conventionally, cutting tools used for crushing and pulverizing have been conventionally used as a material which balances abrasion resistance and fracture resistance to a certain extent, and is often made of alloy tool steel,
Alloy steel such as high-speed tool steel is used. In particular, in the current situation where the crushed material is separated but the foreign matter cannot be prevented as in the case of industrial waste treatment, alloy steel is suitable for preventing sudden breakage of the blade. However, alloy steel is not sufficiently satisfactory in terms of wear resistance against hard crushed objects. Since the life of the cutting tool is short, the rotary blade must be replaced frequently, and the labor and cost required for maintenance have been a problem.

[0003] On the other hand, a super hard tool material represented by a super hard alloy has higher hardness and higher wear resistance than alloy steel, and therefore has a longer tool life and is suitable for crushing or crushing in a specific field such as rock, ore, coal and the like. Some of these tools are already in practical use, but are not commonly used for treating industrial waste.

[0004]

The super hard tool material has high wear resistance, but low fracture resistance. Industrial waste crushers are basically crushers that use the shearing action.In situations where foreign matter cannot be completely prevented, the use of super-hard tool materials as crushing blades is not unusual for chipping. I'm worried about stability. An object of the present invention is to realize a rotary blade for crushing that has improved stability against chipping while utilizing the high wear resistance of a super-hard tool material.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a circular flat plate-shaped tool body in which a crushed piece pocket is cut off at an outer peripheral portion, and an outer peripheral edge of the tool body. A crushing blade is formed along the crushing blade, and the crushing blade is a rotary blade for crushing using a super-hard tool material, and the outer periphery of the tool body without covering the crushing blade made of the super-hard tool material. The surface is covered with an alloy steel, and a main crushing blade is formed on the super hard tool material, and a sub-crushing blade is formed on a side ridge along the main crushing blade of the alloy steel.

[0006] An outer peripheral edge of a tool body made of alloy steel is used as a sub-crushing blade, and a super-hard tool material chip is buried on the side surface of the tool body along the sub-crushing blade, and an end face of the chip is formed by the tool. The tip is slightly protruded from the side surface of the main body, and an outer peripheral edge of the protruded tip is used as a main crushing blade.

[0007] Further, a mounting hole is formed in the super hard tool material chip, and the chip is detachably mounted on a tool body by a tightening screw.

With the above construction, the rotary blade for crushing of the present invention is located at a position slightly outward in the outer circumferential direction and slightly narrower in the width direction than the main crushing blade made of a super-hard tool material. It has a so-called two-stage crushing blade structure with a sub-crushing blade. The object to be crushed appears to be crushed by a single shear instantaneously, but in detail, the shearing acts in two stages, the sub-crushing blade and the main crushing blade, and particularly the second-stage shearing. The impact on the crushing blade made of ultra-hard tool material is reduced. Also, if foreign matter that cannot be processed is mixed during the crushing process, the abnormality can be recognized while the sub-crushing blade is in contact with the foreign matter.Therefore, the machine can be stopped or reversed to remove the foreign matter. become able to. As a result, the main crushing blade is protected from the strong impact by the sub-crushing blade.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment. FIG. 1 is a perspective view of a rotary blade 1, FIG. 2 is a front view, and FIG. 3 is a side view thereof. Although the tool body 2 originally has a circular flat plate shape, a plurality of crushed piece pockets 3 are cut out at equal intervals on an outer peripheral portion thereof, and as a result, are formed in a substantially polygonal flat plate shape. A spline hole is formed in the center of the tool body 2 so that a mounting hole 4 for engaging with the rotation shaft of the crusher is provided.
It has become.

The outer peripheral edge of the tool body 2 is the main crushing blade 5, and most of the entire length of the main crushing blade 5 is replaced by a super hard tool material 6 such as a hard metal. That is, with respect to the crushed piece pocket 3 provided for discharging the crushed piece, a strip-shaped chip 7 made of a super-hard tool material 6 is brazed and joined to a side ridge facing the outer periphery thereof. The edge on the rake face side and the outermost edge on the tool body 2 are brazed and joined so as to be formed by two sides of a triangular flat plate tip 8 made of a super-hard tool material 6.

Next, the two surfaces forming the crushed piece pocket 3 and the outermost surface of the tool main body 2 are covered with a thin plate 9 slightly narrower than the main crushing blade 5 can hide. A through hole is formed in the thin plate 9, and the thin plate 9 is screwed and fixed to the tool body 2 by a tightening bolt 10. An alloy steel such as an alloy tool steel is used for the thin plate 9, and the sub-crushing blade 11 is formed on the edge forming the width. Accordingly, the sub-crushing blade 11 is located at a position slightly inward in the width direction of the main crushing blade 5 and is located at a position outside in the outer circumferential direction by the thickness of the thin plate 9.

FIG. 4 is a simplified schematic diagram illustrating the use state of the rotary blade 1. The crusher has two rotation axes in parallel, and spacers 12 and the rotation blades 1 are alternately incorporated into one of the rotation shafts so that the rotation blades 1 are juxtaposed at regular intervals. Similarly, the other rotary shaft has the rotary blades 1 incorporated at regular intervals via the spacers 12. At this time, the rake faces of the two rotary blades 1 are incorporated facing each other, and both the rotary blades 1 The spacers 12 are arranged so as to mesh with each other while maintaining a certain clearance. The two rotating shafts rotate in opposite directions in which they are wound around the center, and the object to be crushed is crushed by a shearing action that occurs at a location where both crushing blades intersect. In the crusher configured as described above, the rotary blade 1 of the present invention characterized by a two-stage crushing blade
First, the secondary crushing blade 11 having a high toughness bears impact, and is sheared by the main crushing blade 5 having high hardness and excellent abrasion resistance but lacking stability against fracture, thereby extending the life and stabilizing the fracture resistance. It is intended to be sex.

5 to 7 show a second embodiment. FIG. 5 is a perspective view of the rotary blade 1, FIG. 6 is a front view, and FIG.
Is a side view thereof. It is the same as the first embodiment that a plurality of crushed piece pockets 3 are cut out at equal intervals on the outer peripheral portion of the tool body 1 and a mounting hole 4 is formed at the center. An alloy steel such as an alloy tool steel is used for the tool body 2, and an outer peripheral edge thereof is used as a sub-crushing blade 11. The side surface of the tool body 2 is dug along the sub-crushing blade 11, and a chip made of a super-hard tool material is embedded in the dug portion. The chip is composed of two kinds of chips, that is, a square plate-shaped chip 13 and a trapezoidal plate-shaped chip 14. The chip is fixed to the tool body 2 by a tightening bolt 15 that is passed through a through hole formed in the chips 13, 14. You. Although the chips 13 and 14 can be formed as an integral body of only the super-hard tool material 6, in the present embodiment, the super-hard tool material 6 is brazed to a steel plate as shown in FIG. The super hard tool material 6 is saved as a blade type.

The end faces of the tip 13 and the tip 14 are formed at the same height, and are disposed such that the outer end faces slightly protrude from the side face of the tool body 2. This protruding chip 13,
The outer peripheral edge of 14 becomes the main crushing blade 5, and a two-stage crushing blade relationship is formed with the sub-crushing blade 11. Note that chip 1
Since the parts 3 and 14 are detachable, they can be replaced only at the time of damage or at the end of their service life.

[0016]

The rotary blade for crushing according to the present invention is characterized in that it is constituted in two stages of a main crushing blade and a sub-crushing blade, and the suitable tool material is applied to each of them so that the crushing resistance is improved. As a secondary crushing blade with material properties with excellent chipping properties cushions the impact during crushing, and a main crushing blade with material properties with excellent wear resistance will substantially shear the material to be crushed. The life and fracture resistance are improved at the same time, and as a result, the running cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a rotary blade for crushing of the present invention.

FIG. 2 is a front view of the rotary blade shown in FIG.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic diagram for explaining a use state of a crushing rotary blade.

FIG. 5 is a perspective view showing a second embodiment of the rotary blade for crushing of the present invention.

6 is a front view of the rotary blade shown in FIG.

FIG. 7 is a side view of FIG. 6;

8A is a plan view of a chip used in FIG. 5, FIG.
(B) is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary blade 2 Tool main body 3 Fragment piece pocket 5 Main crushing blade 6 Super hard tool material 7, 8, 13, 14 Tip 11 Secondary crushing blade

Claims (3)

[Claims] 1. A crushing piece pocket is cut out at an outer peripheral portion of a tool body having a circular flat plate shape, a crushing blade is formed along an outer peripheral edge of the tool body, and a super hard tool is provided on the crushing blade. In the rotary blade for crushing in which the material is used, the outer peripheral surface of the tool body is covered with alloy steel without covering the crushing blade made of the super-hard tool material, and the main crushing blade is used for the super-hard tool material. A rotary crushing blade characterized in that a sub-crushing blade is formed on a side ridge along a main crushing blade of alloy steel. 2. An outer peripheral edge of a tool body made of an alloy steel is used as a sub-crushing blade, and a super-hard tool material chip is buried in a side surface of the tool body along the sub-crushing blade, and an end face of the chip is formed by the tool. 2. The crushing rotary blade according to claim 1, wherein the tip is slightly protruded from a side surface of the main body, and an outer peripheral edge of the protruding tip is a main crushing blade. 3. The tool tip according to claim 1, wherein a mounting hole is formed in the super-hard tool material tip so that the chip can be detachably mounted on the tool body with a tightening screw. Rotary blade for crushing.