JP3396276B2 - Initial chipping prevention cutting method for saw blade - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting an initial chipping prevention of a saw blade.

[0002]

2. Description of the Related Art Conventionally, when a new saw blade having a sharp cutting edge is used for cutting a work, when the work is cut under normal cutting conditions (saw speed, depth of cut) from the beginning. It is known that a large number of chippings occur at the cutting edge of the saw blade, shortening the life of the saw blade.

As a countermeasure against this, until now, for example, under the cutting conditions in which the saw speed is slower and the cutting depth is smaller than the normal cutting conditions, the rough cutting is carried out to wear the saw blade edge portion by a certain amount. The saw blade has a long service life without chipping.

[0004]

By the way, when the above-mentioned conventional non-cutting cutting is performed, the time required for the non-cutting cutting takes, for example, about 70 minutes, which is very long, and when the non-cutting cutting is switched to the normal cutting. Changing the setup such as saw speed and depth of cut involved a very troublesome work.

In order to solve the above problems, an object of the present invention is to greatly reduce the time for the rough cutting so that chipping does not occur under any cutting condition, and to change the setup such as the saw speed and the cutting depth. An object of the present invention is to provide an initial chipping prevention cutting method for a saw blade that eliminates the need for cutting.

[0006]

In order to achieve the above-mentioned object, the present invention, when performing a cutting process on a work with a new saw blade, uses the saw blade on a work in which hard particles are dispersed in a soft material in advance. This is a cutting method for preventing initial chipping of a saw blade, which is characterized by performing burrs cutting.

In the above-mentioned cutting method, the workpiece in which hard particles are dispersed in the soft material is clamped by a clamp device, and the saw blade is subjected to the rough cutting to form a certain amount of wear on the saw blade. In addition, it is desirable to carry out non-stick cutting with a saw machine equipped with a mechanism in which the work in which hard particles are dispersed in the soft material is pressed against the saw blade for a certain period of time.

[0008]

By employing the cutting method for preventing the initial chipping of the saw blade according to the present invention, when the work is to be cut with a new saw blade, the saw blade is preliminarily dispersed on the work in which hard particles are dispersed in a soft material. In this way, by performing the rough cutting in a short time, a certain amount of initial wear is formed on the tip portion of the saw blade. Since no chipping occurs under any cutting conditions, no need for setup change,
Normal cutting is performed.

[0009]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 4, a work table 5 on which a work W is placed is provided on a box-shaped base 3 of, for example, a horizontal band saw machine 1 as a saw machine. On the work table 5, a main body vice device 7 is provided as a clamp device for holding the work W. The main body vise device 7 is composed of a fixed vise 7F and a movable vise 7M, and the work W is clamped by pressing the fixed vise 7F and moving the movable vise 7M.

A saw blade housing 9 is provided above the work table 5, and the saw blade housing 9 has a pivot pin 11 provided on one side (right side in FIG. 4) of the work table 5. It is rotatable as a fulcrum. The vertical movement of the saw blade housing 9 is performed by the expansion and contraction movement of the piston rod 15 mounted on the lifting cylinder 13 provided on the work table 5 and a part of the saw blade housing 9.

A drive wheel 17 and a driven wheel 19 around which an endless band saw blade B is wound are rotatably mounted on both sides of the saw blade housing 9. Therefore, when the drive motor (not shown) is driven, the drive wheel 17 is rotated, so that the band saw blade B wound around the drive wheel 17 and the driven wheel 19 is rotated.

Saw blade guide members 23A, 23B for guiding and supporting the band saw blade B are provided on the upper support plate 21 supported on the upper portion of the saw blade housing 9, and the tips of the saw blade guide members 23A, 23B are provided. The saw blade guide part 25
Equipped with A and 25B. This saw blade guide portion 25A, 2
The band saw blade B which is rotated by 5B is guided and supported. The saw blade guide portion 25A is fixed, and the saw blade guide portion 25B is moved according to the size of the work W.

Below the work table 5 and inside the base 3, there is provided a pressing mechanism 27 for pressing the work W _A for cutting shaving used in cutting the saw blade B against the band saw blade B for a certain period of time. It is provided.

More specifically, as shown in FIGS. 1 and 2, a drive box 29 forming a part of the pressing mechanism 27 is installed on the lower frame 3D of the base 3. A pair of bevel gears, for example, are built in the box 29, and an output shaft of a turning motor 31 is mounted on one of the bevel gears. The other bevel gear is fitted to the lower part of the pivot shaft 33 extending in the vertical direction. The pair of bevel gears are of course meshed with each other. Swivel axis 3
A swivel frame 35 is attached to the upper part of the unit 3.

When the swing motor 31 is driven by the above structure, the swing shaft 33 is driven, for example, through a pair of bevel gears.
Is rotated, the revolving frame 35 is revolved as indicated by an arrow in FIG.

A plurality of guide rails 37A, 3 extending in the left-right direction are provided on the lower surface of the revolving frame 35 in FIG.
7B is laid and these guide rails 37A, 37
B is provided with a front-rear movement frame 39 that is movable in the front-rear direction (left-right direction in FIGS. 2 and 3). A front-rear movement motor 41 is attached to the left side surface of the front-rear movement frame 39 in FIGS. The forward / backward movement motor 41 includes a ball screw 4 extending in the forward / backward direction.
The front part of 3 is connected. A nut member (not shown) is screwed into the ball screw 43, and the moving frame 39 is integrated with the nut member.

With the above structure, when the front-rear moving motor 41 is driven, the ball screw 43 is rotated, so that the front-rear moving frame 39 is guided by the guide rails 37A, 37B and moved in the front-rear direction. .

A side surface of the front-rear moving frame 39 (see FIG. 2).
A plurality of parallel guide rails 45A and 45B extending in the vertical direction are laid on the lower surface), and a vertical moving frame 47 movable in the vertical direction is provided on the guide rails 45A and 45B. On the upper part of the up-and-down moving frame 47, a worktable 49 for cutting shavings on which a work W _A for cutting shavings is placed is provided. Therefore, the non-working cutting work W _A is clamped on the non-working cutting work table 49 by a clamp device (not shown).

A pressing motor 51 is attached to the lower surface of the front-rear moving frame 39. A lower portion of a ball screw 53 extending in the vertical direction is connected to the pressing motor 51, and a nut member (not shown) is screwed into the ball screw 53. The nut member is provided with the vertical movement frame 47.

With the above structure, when the pressing motor 51 is driven, the ball screw 53 is rotated to move the vertical moving frame 47 into the guide rails 45A, 45.
It will be guided by B and moved up and down. Therefore, the work table 49 for cutting shavings on which the work W _A for cutting shavings is placed is moved up and down.

With the above structure, the work W is placed on the work table 5 and clamped by the main body vice device 7 to lower the band saw blade B which is running and rotating.
The work W is cut by the band saw blade B.

When the workpiece W is cut, the band saw blade B
Is new, the new band saw blade B is subjected to non-stick cutting. At that time, as shown in FIGS. 1 and 2, the band saw blade B, which is running and rotated, is lowered to be positioned at a desired position below the work table 5 (FIG. 1).
State). In this state, on the break-cutting work table 49, placing the leveling cutting work W _A of the hard particles dispersed in a soft material, allowed to clamping by the clamping device.

Then, the pressing motor 51 is driven to raise the worktable 49 for cutting the oak, and the worktable 49 for cutting the oak is pressed against the new band saw blade B which is running and rotating to perform the oak cutting. It will be. When the oak cutting work is completed, the oak cutting work table 49 descends and is returned to the position shown in FIG.

When the band saw blade B is not subjected to the rough cutting, the swivel frame 35 is swiveled counterclockwise in FIG. 2 to the shelter position so that the chips and the like generated during the normal cutting process are smoothed. It is possible to prevent the work W _A for cutting and the work table 49 for cutting narciss from contacting the work.

Further, in order to perform the chipping prevention work for one piece of the non-cutting work W _A , the non-cutting work table 49 is moved in the front-rear direction by the front-rear moving motor 41.

Next, as a work W _A for a paste in which hard particles are dispersed in a soft material, for example, S in aluminum (Al) is used.
saw blade and the break-cutting using the workpiece W _A for break-cutting by dispersing iC B ₁ (habituation Cutting time: 1
Min), a conventional saw blade B ₂ (rough cutting time: 70 minutes), and a saw blade B that has not been smooth cut.
Use ₃ of the three, the workpiece W of S45C (250φ)
Normal cutting conditions such as saw speed 65 m / min, cutting rate 10
The result of the chipping number when the cutting process is performed at 0 cm ² / min is as shown in FIG.

As can be seen from these results, the saw blade B, which has been subjected to the non-stick cutting work with the non-stick cutting work W _A of the present embodiment.
_{No. 1} is a cutting time of only 1 minute, which is clearly superior to the saw blade B ₃ which was not cut. Further, it was confirmed that even if compared with a conventional saw blade B ₂ which had been subjected to a non-stick cutting process, it had the same or more effective chipping resistance.

Therefore, before the normal cutting work is carried out, the new saw blade B is subjected to the rough cutting work in a short time by the work W _A for the cutting work in which the hard particles are dispersed in the soft material in advance. As a result, the initial chipping can be prevented, and the cutting can be performed as it is under normal cutting conditions without changing the setup. In addition, the cutting time of the paste can be significantly shortened as compared with the conventional case.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. In this embodiment, an example in which the front-rear moving frame 39 and the up-down moving frame 47 are moved in the front-rear direction and the up-down direction by the ball screw and the motor has been described, but a cylinder or a rack-and-pinion may be used. In addition, to turn the turning frame 35,
Although an example in which the motor and the pair of bevel gears are used for turning has been described, other turning mechanisms such as a motor, a worm wheel, and a worm may be used.

[0031]

As will be understood from the above description of the embodiments, according to the present invention, since the constitution is as described in the claims, before performing the normal cutting work, By cutting the new saw blade in a short time with a work in which hard particles are dispersed in a soft material in advance, it is possible to prevent chipping in the initial stage and to use it under normal cutting conditions without changing the setup. It can be cut. In addition, the cutting time of the paste can be significantly shortened compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a side enlarged view of a main portion of the present invention, which is a view taken along the arrow I in FIG.

FIG. 2 is a plan view of FIG.

FIG. 3 is a diagram showing the relationship between the number of cuts and chipping with a saw blade depending on the presence or absence of light cutting.

FIG. 4 is a front view of a horizontal band saw machine showing an embodiment for carrying out the present invention.

[Explanation of symbols]

1 Horizontal band saw machine (saw machine) 3 base 5 work table 7 Body vice device 25A, 25B saw blade guide section 27 Pushing mechanism 35 swivel frame 39 Front / rear moving frame 47 Vertical movement frame 49 Work table for cutting oak W work WA Narashi cutting work

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Claims (3)

(57) [Claims] 1. An initial chipping prevention cutting of a saw blade, characterized in that when cutting a work with a new saw blade, the work in which hard particles are dispersed in a soft material in advance is cut with the saw blade. Method. 2. A saw having a certain amount of wear formed on the saw blade while the workpiece in which hard particles are dispersed in the soft material is clamped by a clamp device. The method for cutting an initial chipping of a saw blade according to claim 1. 3. The saw blade according to claim 1, wherein the saw blade is provided with a mechanism for pressing a work in which hard particles are dispersed in the soft material against the saw blade for a certain period of time. Initial chipping prevention cutting method.