KR20100116788A - Method for manufacturing of cutting tip for saw and structure thereof - Google Patents

Abstract

PURPOSE: A method for manufacturing a cutting tip for a saw and a structure of the cutting tip are provided to reduce noises and contact resistances in cutting and improve the cutting efficiency. CONSTITUTION: A method for manufacturing a cutting tip for a saw comprises steps of: preparing a circular disk(10) of fixed diameter, mixing metal powder into diamond powder or carbide alloy powder to produce a unit cutting tip material, mixing one or more kinds of metal powders to form a reinforcement material, alternately arranging the unit cutting tip material and the reinforcement material in a carbon mold, inserting the carbon mold in a furnace and sintering it by selectively injecting nitrogen gas at the fixed pressure and temperature, putting the sintered carbon mold into a cooling press and cooling it for a specified time at a specified temperature, and welding a cutting tip separated from the cooled carbon mold to the shank of the disk with silver solder or laser.

Description

Method for manufacturing of cutting tip for saw and structure

The present invention relates to a method for manufacturing cutting tips for cutting saws and structures thereof, and more particularly, to a method for manufacturing cutting tips bonded to shanks of diamond saws or cemented carbide saws for cutting or cutting. .

Generally, the cutting tips used at the edges of diamond saw or cemented carbide hard metal are iron (Fe), tungsten (W), cobalt (Co) and copper which bond diamond powder or cemented carbide powder. Sintered after sintering after molding by mixing with metal powders such as (Cu), nickel (Ni), tin (Sn), copper-tin (CuSn), zinc (Zn), copper-zinc (CuZn), silver (Ag) Alloy.

In the forming step before firing, the mixed powder is put into a cubic cavity, and the first press molding is carried out, and the first press-molded mixture (hereinafter referred to as the first press molding) is placed in the cavity of the carbon mold, and the puncher is placed. The cutting tip is shaped to correspond to the shape of the puncher while applying a relatively large pressure. A diamond cutting tip or cemented carbide cutting tip is completed by firing a cutting tip shaped into a constant shape in a sintering furnace.

As a prior art, the stone cutting wheel of the Patent Publication No. 10-0764037 and a manufacturing process thereof include a disk-shaped disk having a rotating hole in which a rotating shaft of a cutting machine is inserted in the center thereof; A tip disposed at the circumferential portion of the disk at equal intervals and having a cutout portion formed outside or inside to facilitate circulation of the coolant and removal of the cut stone tip; Disclosed is a stone cutting wheel comprising slots formed at equal intervals between the tip and the tip, wherein a filler made of a softer metal material than the tip fills the cutout.

In the prior art, the filler formed in the tip is filled with a softer filler than the tip to increase cutting speed and reduce cutting noise to improve the working environment.

However, although the noise generated during cutting of the stone is reduced and the cutting speed is improved to some extent by the filling of the filler in the cut portion formed in the tip, the load applied to the wheel during cutting of the stone still has a high problem.

The present invention is to solve the above problems, by forming a plurality of unit tips and reinforcing fixture alternately integrally formed by cutting tips bonded to the shank of the saw to reduce noise and periodic contact resistance due to cutting of the cutting object. The aim is to significantly reduce and improve cutting efficiency.

In order to achieve the above object, the present invention provides a circular disk having a predetermined diameter in which a rotating hole coupled to a rotating shaft of a cutting machine is formed at a center thereof, a cutout groove is formed at regular intervals, and a shank is formed between the cutout grooves. Making; (b) Iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), silver (Ag) and manganese (diamond) or cemented carbide powder with unit cutting tips. Mn) is mixed with at least one metal powder, and the reinforcing fixture 21 is iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), silver Mixing at least one metal powder of (Ag) and manganese (Mn); (c) alternately arranging the mixed metal powder of the unit cutting tip and the metal powder of the reinforcing fixed body in a carbon mold in a predetermined shape and volume; (d) inserting the carbon mold into a furnace and sintering by selectively adding nitrogen gas (N ₂ ) at a constant pressure and temperature; (e) charging the sintered carbon mold in a cooling press to cool at a constant temperature for a predetermined time; (f) characterized in that it provides a method for producing a cutting tip of the cutting saw comprising the step of bonding the cutting tip formed from the cooled carbon mold to the shank of the disc with silver lead or laser.

In addition, the present invention in the center of the circular disk is formed in the rotating hole coupled to the rotating shaft of the cutting machine, the cutting groove is formed at a predetermined interval on the disk edge, the cutting saw in the shank is formed between the cutting groove, A cutting tip structure of cutting saws, in which a plurality of unit cutting tips having a predetermined shape and volume and a reinforcing fixing body are alternately formed and bonded to a cutting tip, is provided.

According to the present invention, by the above-mentioned solution means, a plurality of unit cutting tips and reinforcing fixing bodies are alternately bonded to the shank of the saw to significantly reduce the contact resistance with the cutting object, thereby improving cutting efficiency according to cutting, and thereby providing a plurality of units. The load by the cutting tip can be minimized, the load by cutting is small, the power consumption is low, the noise is reduced when cutting by cutting the cutting object, and the productivity of the cutting object is improved by increasing the cutting efficiency. This has the effect of improving the durability of the cutting tip.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the cutting tip manufacturing method and structure of the cutting saw of the present invention.

1 is a perspective view showing a saw according to the present invention, Figure 2 is a plan view.

First, the cutting tip of the cutting saw of the present invention is a cutting tip by cutting a plurality of unit cutting tips and reinforcing fixtures by molding and reducing contact resistance with cutting objects such as stone, concrete, wall or brick To improve cutting efficiency.

The saw 1 is usually in the shape of a circular disk 10. The edge of the disk 10 is formed with a cutting groove 13 of a predetermined interval and depth. In the center of the disk 10, a rotating hole 11 to which the rotating shaft of the cutting machine is coupled is formed. Shanks 12 are formed between the cutouts 13 of the disc 10.

And the shank 12 is joined to the cutting tip 20 in which the plurality of unit cutting tips 22 and the reinforcing fixing body 21 are alternately molded and joined at regular intervals.

Furthermore, referring to the cutting tip 20 of FIG. 3 shown in the embodiment of the present invention, the unit cutting tips 22a-22d of the cutting tip 20 are arranged at regular intervals, and the unit cutting tips 22a-22d. The reinforcing fixture 21a-21c is arrange | positioned in between. That is, the reinforcing fixture 21a is arranged after the unit cutting tip 22a, and the unit cutting tip 22b is arranged after the reinforcing fixture 21a. The reinforcing fixing bodies 21b and 21c and the unit cutting tips 22c and 22d are sequentially arranged and joined again. The cutting tips 20 arranged as described above are integrally formed and molded by the thickness and width of the shank 12 of the disk 10, and the arrayed cutting tips 20 are bonded and fixed on the shank 12.

The saw 1 to which the cutting tip 20 of such a structure is bonded is minimized in resistance and load caused by friction or contact with the cutting object when rotating for cutting, thereby preventing breakage or loss of the cutting tip 20. It can prevent.

The unit cutting tips 22a-22d arranged in the cutting tip 20 of the present invention are preferably arranged in a small number and in a large number of five.

The unit cutting tips 22a-22d of the cutting tip 20 are made of diamond powder or cemented carbide powder, and include iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), and tungsten ( W), silver (Ag) and manganese (Mn) is a sintered alloy which is fired after mixing and molding at least one metal powder, the reinforcing fixture 21 is iron (Fe), copper (Cu), cobalt ( Co, zinc (Zn), nickel (Ni), tungsten (W), silver (Ag) and manganese (Mn) is a sintered alloy which is fired after mixing and molding one or more metal powders.

A method of manufacturing a cutting tip of the cutting saw of the present invention will be described with reference to the flowchart of FIG. 4.

First, the circular disk 10 of the predetermined diameter used as the body of the cutting saw 1 is prepared (S10). The center of the disk 10 is formed with a rotating hole 11 coupled to the rotating shaft of the cutting machine, the cutting groove 13 is formed at a predetermined interval on the edge of the disk 10. And the shank 12 is formed between the incision grooves (13).

In addition, the unit cutting tip 22 and the reinforcing fixing body 21 are mixed and molded with the cutting tip 20. That is, with the unit cutting tip 22, the diamond powder or the cemented carbide powder is coated with iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), silver (Ag) and manganese. One or more metal powders are mixed in (Mn), and the reinforcing fixing body 21 is iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), One or more metal powders of silver (Ag) and manganese (Mn) are mixed (S11).

The metal powder of the mixed unit cutting tip 22 and the metal powder of the reinforcing fixing body 21 are alternately arranged in a carbon mold in a predetermined shape and volume (S12). That is, by sequentially arranging the unit cutting tip 22 and the reinforcing fixing body 21 in the carbon mold to form the shape of the cutting tip 20.

The carbon mold is placed in a furnace and sintered at a predetermined pressure and temperature (S13). At this time, nitrogen gas (N ₂ ) is added to the furnace to sinter as necessary.

The carbon mold sintered in the furnace is charged to a cooling press and cooled at a predetermined temperature for a predetermined time (S14). The cutting tips 20 formed from the cooled carbon molds are bonded onto all the shanks 12 formed at the edges of the disk 10 using silver solder or a laser (S15).

In this way, the cutting tips are bonded to the edges of the cutting saw at regular intervals.

Figure 5a is a graph showing the contact load of the cutting tip to the cutting object according to the prior art, Figure 5b is a graph showing the contact load of the cutting tip to the cutting object according to the present invention. 5A and 5B, when the unit cutting tip of the cutting tip and the cutting object are in contact with each other, the parabolic teeth of the cutting tip decrease as the cutting tip passes through the surface of the cutting object. It is continuously formed by the number of cutting protrusions formed. Therefore, contact resistance with the cutting object is formed for each corresponding cutting protrusion. Therefore, the present invention can obtain the effect that the generation of contact resistance and heat is relatively smaller than the prior art, the cutting efficiency is increased.

In addition, the experimental graph of FIG. 6A shows the load R applied to the initial cutting tip when starting the cutting of the cutting object, and after the 100% load R is applied, the test graph drops to the load R of 60%. can see. However, the experimental graph of FIG. 6B shows the load R applied to the initial cutting tip when starting the cutting of the cutting object, and the lowering to the load R of 90% after the load R of 100% is applied. can see. Therefore, it can be seen that the present invention significantly improves the efficiency for the load R than the prior art.

In addition, the experimental graph of FIG. 7A is a graph which shows the relationship between cutting efficiency and cutting speed of prior art (A) and this invention (B). In this graph, the present invention shows an improved effect of about 18% or more in terms of cutting efficiency (W) and cutting speed (V) over the prior art.

In addition, the experimental graph of FIG. 7B is a graph which shows the relationship between the contact load and cutting speed of prior art (A) and this invention (B). In this graph, the present invention shows a cutting effect in which the cutting speed V according to the contact load R is improved compared to the prior art.

Thus, the present invention is a structure of the cutting tip of the saw for cutting a cutting object such as stone or concrete or brick or wall surface is a plurality of units than when a single reinforcing fixture is molded in one cutting tip of the prior art It can be seen that the cutting efficiency for the cutting object is improved that the plurality of reinforcing fixtures are sequentially arranged on the cutting tip.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who has a can easily know.

1 is a perspective view showing a cutting saw according to the present invention.

2 is a plan view showing a cutting saw according to the present invention.

3 is a view showing a cutting tip of the present invention.

Figure 4 is a flow chart showing the manufacturing process of the cutting tip of the cutting saw of the present invention.

5A and 5B are graphs comparing loads applied to an initial cutting tip when starting cutting of a cutting object.

6A and 6B are graphs comparing the relationship between cutting efficiency and cutting speed.

7A and 7B are graphs comparing the relationship between contact load and cutting speed.

Claims (4)

(a) A circular disk having a predetermined diameter having a rotating hole 11 coupled to the rotating shaft of the cutting machine at the center thereof, a cutting groove 13 formed at regular intervals, and a shank 12 formed between the cutting grooves 13. (10) preparing; (b) Iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), silver (Ag) to diamond powder or cemented carbide powder with the unit cutting tip 22 And one or more metal powders of manganese (Mn), and iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), and tungsten (W) as a reinforcing fixture 21. ), Mixing at least one metal powder among silver (Ag) and manganese (Mn); (c) alternately arranging the mixed metal powder of the unit cutting tip 22 and the metal powder of the reinforcing fixing body 21 in a carbon mold in a predetermined shape and volume; (d) inserting the carbon mold into a furnace and sintering by selectively adding nitrogen gas (N ₂ ) at a constant pressure and temperature; (e) charging the sintered carbon mold in a cooling press to cool at a constant temperature for a predetermined time; (f) manufacturing the cutting tip of the cutting saw, comprising the step of joining the cutting tip 20 formed from the cooled carbon mold to the shank 12 of the disk 10 by silver solder or laser. Way. According to claim 1, The cutting tip 20 is bonded to the shank 12 is arranged in three to five unit cutting tips 22, the reinforcing fixture 21 between the unit cutting tips 22 Cutting tips manufacturing method of the cutting saw, characterized in that the joining arrangement. A circular hole 10 is formed at the center of the circular disk 10 to be coupled to the rotating shaft of the cutting machine, and the cutting grooves 13 are formed at regular intervals at the edge of the disk 10, and the shanks (between the cutting grooves 13) are formed. In the cutting saw 12), Cutting saws, characterized in that the cutting tip 20 is formed by alternately molding the plurality of unit cutting tips 22 and the reinforcing fixing body 21 having a predetermined shape and volume to the shank (12). Cutting tip structure. The method of claim 3, wherein the unit cutting tip 22 is a diamond powder or cemented carbide powder to iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), It is a sintered alloy fired after mixing and molding one or more metal powders of silver (Ag) and manganese (Mn), The reinforcing fixture 21 is one of iron (Fe), copper (Cu), cobalt (Co), zinc (Zn), nickel (Ni), tungsten (W), silver (Ag) and manganese (Mn). A cutting saw structure for cutting saws, characterized in that the sintered alloy is fired after mixing and molding the above metal powder.

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