KR200207960Y1 - Cutting edges of round saws for metal cutting - Google Patents

Abstract

The present invention relates to a cutting edge of a circular saw for cutting a metal product, and more particularly to a design that can effectively prevent excessive load applied to the cutting edge by maintaining a constant depth of the cutting edge entering the metal material.

In the related art, when the handle hinged to the cutter is pressed too hard, high heat is generated along with a significant load on the cutting edge of the round saw, which accelerates abrasion of the cutting edge and shortens its life.

Therefore, the present invention is formed in the rear of the cutting edge 20, the entry barrier jaw 21 having a height (H) lower than the tip 30, so as to be inclined forward 8 ° from the center line 11 of the round saw 10. At the upper end of the formed tip 30, the cutting edges 31 having inclined surfaces of 3 ° and 5 ° on both sides are formed so as to form cutting edges formed to intersect at each tip 30, thereby operating the circular saw 10. Even when the knob 40 is strongly pressed, the depth to be cut is always constant to effectively prevent the overload applied to the cutting edge 20 and to minimize the wear of the cutting edge 20 to prolong its life. At the same time, since the chip is divided into three parts and discharged smoothly, the cutting efficiency can be maximized, and even an unskilled worker can easily perform the cutting operation.

Description

Cutting edges of round saws for metal cutting

The present invention relates to a cutting edge of a circular saw for cutting a metal product to a predetermined length, and in particular, to maintain a constant depth of the cutting edge entering the metal material to effectively prevent excessive load on the cutting edge It is about.

In general, a round saw used for cutting a metal product has a configuration in which numerous cutting edges are formed on an outer circumferential surface of a metal disc, and a cutting tip made of cemented carbide is mounted at the tip of the cutting edges.

Such a circular saw is lowered by the force pushing down the handle hinged to the cutter, and the cutting edges cut the metal material. Therefore, the force for pressing the handle is proportional to the cutting depth of the material and the discharge of the chip. It became.

Therefore, when the handle is pressed too hard, there is a closed end such as high heat is generated along with a considerable load on the cutting edge to promote the wear of the cutting edge, and the discharge of the chip may be desired due to excessive discharge of the chip generated during cutting. There is a problem such that the circular saw is broken or the rotation is stopped because the heavy load is generated in the rotation of the circular saw rather than made.

Of course, if the handle is pressed too weakly, it is natural that the cutting speed is significantly reduced. Therefore, there is a need for a skilled worker for cutting work, since a proper force adjustment is required when operating the handle.

The present invention was devised in view of the above problems, and its purpose is to maintain a constant depth of the cutting edge entering the metal material to prevent excessive load applied to the cutting edge to cut the metal to maximize the cutting efficiency To provide a cutting edge for a circular saw.

Features of the present invention for achieving the above object,

In the cutting edges 20 are formed on the outer circumferential surface of the circular saw 10, the tip 30 of the cutting edge 20 is formed,

At the rear of the cutting edge 20 is formed an entry barrier (21) having a height (H) lower than the tip of the tip 30, the tip 30 is forward 8 from the center line 11 of the circular saw 10 It is formed to be inclined, the upper end of the tip 30 is formed on both sides of the blade edge having a slope of 3 ° and 5 °, respectively, the edge of the edge of the tip 31 31 is the position of the tip 30 Repeatedly formed so as to intersect at the point ⅓ and ⅔, the tip of the tip 30 viewed from the plane is formed to be inclined 2 °, but for cutting the metal, characterized in that formed to cross each other in the inclined direction of the tip 30 It can be achieved by a cutting edge of a round saw.

1 is a front view illustrating an embodiment of the present invention,

2 is an enlarged front view of the cutting edge according to the present invention;

3 is an enlarged plan view of a cutting edge according to the present invention;

4 is an enlarged side view of the cutting edge according to the present invention;

5 is a perspective view illustrating a state in which the present invention is mounted on a round saw cutter.

Explanation of symbols on the main parts of the drawings

10: round saw

11: centerline

20: cutting edge

21: entry barrier

30: tips

31: Edge of edge

40: handle

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object in detail as follows.

As shown in Figure 1 to 5,

Countless cutting edges 20 are repeatedly formed on the outer circumferential surface of the circular saw 10 made of a metal disc, and a tip 30 made of cemented carbide is welded to the tip of the cutting edge 20.

The tip 30 has a very strong hardness and strength, so that the tip 30 is in direct contact with the metal material during the cutting operation to cut the surface little by little.

An entrance stop jaw 21 having a predetermined height H lower than the tip of the tip 30 is formed at the rear of the cutting edge 20 so that the overall cutting edge 20 has a shape like the letter “M”. It is composed.

That is, the height of the tip 30 formed at the tip of the cutting edge 20 is formed to be higher than the entry stop 21 formed at the rear of the cutting edge 20 by a predetermined height (H). When entering into the material, the entry blocking jaw 21 behind the cutting edge 20 is in contact with the material so that the tip 30 cannot be penetrated into the deeper depth.

Therefore, even when strongly pressing the handle 40 for operating the circular saw 10, the depth to be cut is always constant to prevent overload applied to the cutting edge 20 to extend the life of the cutting edge 20 for a considerable period of time. As can be, there is an advantage that the cutting operation can be easily performed even for unskilled workers.

On the other hand, the entry blocking jaw 21 is formed in a semi-circular curved surface when the tip 30 cuts the material to reduce the frictional heat generated when the entry blocking jaw 21 forming a semi-circular curved contact the material smoothly It is possible to keep the cutting surface clean by effectively preventing overload and preventing overload.

The tip 30 is formed to be inclined forward by 8 ° from the centerline 11 of the round saw 10 so that the tip of the tip 30 is easy to cut the material.

In addition, at the upper end of the tip 30, a blade tip edge 31 having downwardly inclined surfaces inclined at 3 ° and 5 °, respectively, is formed on both sides thereof, and the position of the blade edge 31 is at each tip 30. It is formed at points ⅓ and 에서 in the width of) and is repeatedly formed to intersect at the continuously formed tip (30).

Therefore, when the tips 30 cut the material, each edge tip 31 cuts the different positions little by little, so that the load generated during cutting is reduced by half, thereby minimizing the wear of the tips 30. And, because the chip is discharged in three parts, the discharge of the chip is made smoothly, thereby maximizing the cutting efficiency.

In this way, when the points 지점 and 의 of the cutting width are respectively cut, the center portion thereof protrudes, and the entry blocking jaw 21 behind the cutting edge smoothly contacts the protruding portion so that the cutting depth of the cutting edge 20 is always kept constant. To prevent overload.

When the tip 30 is observed in plan view, the tip of the tip 30 is formed to be inclined at an inclination of 2 °, and the inclination direction is formed in opposite directions at each tip 30.

Therefore, when the tip of the tip 30 is also in contact with the cutting material, the edge edge 31 is alternately contacted to minimize the load on the tip 30.

In the present invention as described above, the entry barrier jaw 21 having a height (H) lower than the tip 30 is formed at the rear of the cutting edge 20, the front of the center line 11 of the circular saw 10 In the upper end of the tip 30 formed to be inclined to 8 ° to form a cutting edge that is formed so that the edge of the edge 31 having an inclined surface of 3 ° and 5 ° on both sides to cross at each tip 30, 10) Even when strongly pressing the handle 40 to operate, the depth to be cut is always constant to effectively prevent the overload applied to the cutting edge 20 and to minimize the wear of the cutting edge 20 to reduce its life It can be extended for a considerable period of time, and the chip is divided into three parts, so that the cutting efficiency can be maximized, and even an unskilled worker can easily perform cutting work.

Claims (1)

At the rear of the cutting edge 20, an entry barrier 21 having a height H lower than the tip of the tip 30 is formed, and the tip 30 is 8 ° forward from the center line 11 of the circular saw 10. It is formed to be inclined, and the upper edge of the tip 30 is formed with a blade tip corner 31 having inclined surfaces of 3 ° and 5 ° on both sides, respectively, the position of the blade edge 31 in the width of each tip 30 Repeatedly formed so as to cross the point ⅓ and 선, the tip of the tip 30 viewed from the plane is formed to be inclined 2 °, but the inclined direction of the tip 30, respectively, characterized in that the cutting edge of the round saw for metal cutting .