JPH10174506A - Manufacture of grooving and excavating blade for planting seed of lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grooving and excavating blade for planting the seeds of lawn with excellent wear resistance, durability and operability by performing self-fluxing alloy spraying to both side faces of a steel plate. SOLUTION: By spraying a self-fluxing alloy to both side faces of an excavating blade made of the steel plate and heating it thereafter, the adhesive strength of a spray coating 2 and the steel plate is improved, the hardness of the coating 2 is turned to be more than Rockwell C hardness 50 and this grooving and excavating blade for planting the seeds of the lawn is obtained. Also, it is preferable to perform constitution so as to turn the thickness of the steel plate to 1.5-4mm and turn the thickness of the spray coating 2 to be within the range of 1/10-1/2 to the thickness of the steel plate on one side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a grooving and excavating blade for sowing turf seeds having excellent durability and workability by using a self-fluxing alloy spraying method.

[0002]

2. Description of the Related Art In a golf course, a soccer field, and other parks, for the purpose of planting turf, turf and soil are dug by a turf manager equipped with a steel rotating excavating blade. I have. The digging blade used for this work is generally made of carbon steel, so it wears out in a short time due to friction with turf and soil, and frequent blade replacement work is required, and workability and economy are poor. There was a problem.

In some cases, a cemented carbide tip is brazed to the tip of a steel drilling blade to improve the wear resistance of the tip of the drilling blade. When a hard substance such as pebbles hits the tip, there is a problem that the chip made of cemented carbide is chipped or the chip easily falls off from the brazing portion.

[0004]

SUMMARY OF THE INVENTION The present invention relates to the problems of these prior arts, namely, that the steel drilling blade is inferior in abrasion resistance, and that when a tip made of a cemented carbide is brazed to the tip, the chip is chipped and falls off. It is made in view of the drawback that it occurs, it is durable and can be used continuously for a long time,
An object of the present invention is to provide a method for producing a grooving excavation blade for sowing grass.

[0005]

SUMMARY OF THE INVENTION According to the present invention, one or more of a self-fluxing nickel alloy, a cobalt self-fluxing alloy and a tungsten carbide self-fluxing alloy are provided on both sides of a steel excavating blade. From a three-layer structure of self-fluxing alloy / steel / self-fluxing alloy by coating the alloy by thermal spraying method, and then heating and melting the thermal spray coating by a heat source such as oxygen acetylene flame, and joining the coating and steel metallurgically The present invention is characterized in that a digging blade is manufactured.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The thickness of a grooving excavating blade for sowing grass is 1.5 to 4 mm in a steel plate portion, taking into account the load applied to the power side such as a motor and the bending of the blade due to soil resistance. It is appropriate that the thickness of the sprayed self-fluxing alloy film after the melting treatment is in the range of 1/10 to 1/2 of the thickness of the steel sheet on one side. The location where the self-fluxing alloy is sprayed on the excavation blade is limited to the effective width used for grooving work from the tip of the blade toward the center on both sides of the blade. Also heating,
The hardness of the sprayed self-fluxing alloy film after the melting treatment is desirably 50 or more in Rockwell C hardness display.

[0007] Thus, the self-fluxing alloy / steel / self-fluxing alloy 3
An excavating blade having a layered structure has excellent durability because of its hard surface and high toughness. In the present invention,
The reason why the thickness of the self-fluxing alloy sprayed coating was set within the range of 1/10 to 1/2 on one side with respect to the thickness of the steel sheet is as shown in FIG. 1 because of the resistance to sediment wear and abrasive wear. When the steel plate was sandwiched by the excellent self-fluxing alloy spray coating, the tip of the blade after the grooving work had a protruding shape, as shown in FIG. 2, because the center of the steel having low hardness was concave. In some cases, the sprayed self-fluxing alloy may be chipped or peeled off. To prevent this, a certain thickness is required for the thickness of the steel sheet. 2 by processing
Because it shrinks by about 0%, thickening the coating more than necessary will cause the entire excavation blade to bend during cooling,
In addition, the production cost was also set in consideration.

Therefore, for example, when the thickness of the steel sheet is 1.5 mm, the thickness of the self-fluxing alloy sprayed coating is 0.15 to 0.75 m.
m, when the thickness of the steel plate is 4 mm, the thickness of the coating is 0.4 ~
Desirably, it is within the range of 2 mm.

When the turf is grooved with the excavating blade according to the present invention, the cross-sectional shape of the tip of the blade becomes as shown in FIG. 1 to FIG. 2, and the projected self-fluxing alloy spray coating becomes a knife edge. Therefore, the groove width is always constant, and the workability is also improved because the turf root cutting performance is good.

[0010]

Next, a first embodiment will be described with reference to FIG. FIG. 3 is a side view of an excavating blade for cutting a turf seed planting groove in a golf course. Steel plate with 10 claws (material is tempered material of spring steel)
The thickness of the cladding was 2.5 mm. As shown in FIG. 3, nickel self-fluxing alloy was coated on both sides of the claws with a gas powder type spray gun by about 0.5 mm on portions effective for groove cutting. After that, the whole excavation blade is heated to about 1050 ° C. with oxygen acetylene flame,
The sprayed coating was melted and then slowly cooled.

When grooving was performed on the turf on the fairway of a golf course using this excavating blade, a grooving operation of about 27 holes was possible. On the other hand, in the case of a steel excavating blade without a self-fluxing alloy spray coating, the claw length is shortened due to wear in about 3 holes, and the thickness of the steel plate is also reduced, so that grooving work is impossible. became. Variations in the durability of the digging blade due to the nature of the soil of the golf course were recognized, but on average, the durability of the digging blade according to the present invention is:
It is 5 to 10 times that of the conventional steel drilling blade.

Next, a second embodiment will be described with reference to FIG. FIG. 4 is a side view of a digging blade for cutting a grass seeding groove of a golf course. This excavating blade has two pairs of large and small blades. In Example 2, a nickel self-fluxing alloy sprayed coating was formed on the surface of a steel sheet
mm.

When grooving work was performed on the turf on the fairway of the golf course using this excavating blade, the tip of the blade was sound as shown in FIG. On the other hand, in the case of a steel excavation blade without a self-fluxing alloy spray coating, the grooving performance sharply decreases in about 4 holes,
The need to change the drilling blade arises.

[0014]

As described above, according to the present invention, durability,
It is possible to provide a grooving digging blade for seed planting of turf that is excellent in workability, and as a result, the work cost such as the time required for adjusting the height of the blade and replacing the blade has been reduced. Is greatly reduced, which contributes to rationalization of turf management work at a golf course or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tip of a cutting blade according to the present invention.

FIG. 2 is a perspective view of the excavation blade tip according to the present invention after the grooving operation.

FIG. 3 is a side view of the excavation blade used in the first embodiment.

FIG. 4 is a side view of a digging blade used in Example 2.

FIG. 5 is a cross-sectional micrograph of the tip of a digging blade after a grooving operation in Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drilling blade main body 2 Self-fluxing alloy spray coating 3 Drilling blade tip 4 Projection made of self-fluxing alloy 5 Rotation shaft mounting hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Tani 3-7-2 Higashi-Gari, Higashi-ku, Sapporo, Hokkaido Inside Tanimec Co., Ltd. (72) Takayuki Tsuta 3-1-2, Higashi-Gari, Higashi-ku, Sapporo, Hokkaido No.7 Inside Tani Mec Co., Ltd.

Claims (3)

[Claims] 1. A method for producing a grooving and excavating blade for grass seed planting, wherein a self-fluxing alloy spraying is performed on both side surfaces of a steel plate. 2. A self-fluxing alloy is sprayed on both sides of a steel plate excavating blade, and then heated to increase the adhesion between the sprayed coating and the steel plate, and the hardness of the coating is set to Rockwell C hardness of 50 or more. 2. The method according to claim 1, wherein 3. The thickness of the steel sheet is 1.5 to 4 mm, and the thickness of the thermal spray coating is one-tenth to one-half of the thickness of the steel sheet on one side.
Claim 1 that is configured to be within the range of
Item 3. The method according to item 2 or 2.