JP3122878B2 - How to cut out the outer panel of the flash panel structure - 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 outer plate of a flash panel structure (hereinafter, mainly referred to as a flash panel) consisting of a frame and an outer plate into a required shape. relates to a method, and more particularly to hula
Bits for the flash structure (hereinafter mainly flash bits).
To improve the sharpness of the blade by reducing the cutting resistance of abbreviated as preparative be used) and suppresses the occurrence of burrs, long to maintain the sharpness while suppressing the consumption of the blade, and to prevent the material burns The outer panel of the flash panel structure
Regarding how to cut out .

[0002]

2. Description of the Related Art As shown in FIG. 11 , in this type of flash bit, a bit body 9 made of a general steel member is used.
In addition, a cemented carbide chip 91 (hereinafter, referred to as a straight line)
What is abbreviated as a cemented carbide tip) is generally used.
The structure of the flash bit will be described in detail. On the rotating side of the carbide tip 91, an outer peripheral cutting edge 911 having the same diameter as the outer peripheral surface 101 of the abutting portion 10 abutting on the frame of the flash panel is formed. I have. In addition, carbide tip 91
It is inclined upward to the left at an angle of about 5 ° relative to the axis of the bit body 9 in FIG. 11. Reference numeral 11 denotes a chip guiding groove for guiding chips from the bit main body 9 to the bit tip, and is provided along the rotating side of the carbide tip 91.

[0003]

However, the above-described conventional device has the following problems. That is, since the carbide tip 91 of the conventional flash bit is brazed at an inclination angle of about 5 ° with respect to the axis, the inclination angle of the outer peripheral cutting edge 911 formed on the carbide tip 91 is also changed. Is as small as about 5 °. For this reason, the outer peripheral cutting edge 911 is substantially perpendicular to the rotation direction, and the manner of mounting the outer peripheral cutting edge 911 increases the cutting resistance applied to the flash bit, and adversely affects the sharpness of the outer peripheral cutting edge 911. Was. Also, if the cutting resistance of the flash bit was large, the outer peripheral cutting edge 911 was quickly consumed and the material was easily burnt.

Further, the chip guide groove 11 provided along the rotating side of the carbide tip 91 also has a small inclination angle with respect to the axis similarly to the outer peripheral cutting edge 911, so that chips are quickly discharged from the bit body 9. It was difficult. That is, the chips accumulated in the bit main body 9 further increase the cutting resistance of the flash bit and hinder cutting of the outer plate by high-speed rotation.

(Object of the Invention) An object of the present invention is to provide a bit for a flash panel structure.
In addition to improving the sharpness of the blade by reducing the cutting resistance of the ト, the generation of burrs is suppressed, the wear of the blade is suppressed, the sharpness is maintained for a long time, and the material is prevented from burning.
An object of the present invention is to provide a method of cutting out an outer plate of a flash panel structure .

[0006]

Means of the present invention taken to achieve the above object are as follows. According to the first invention, a flash panel constituted by a frame and an outer plate is provided.
This is a method of cutting out the outer plate of the tunnel structure, using cemented carbide.
By processing one rod body formed by
Frame formed to form a flash panel structure
Abutment for abutment with the helical twisted side and the screw
Re a cutting portion which is formed by a groove, which contains, on
On the rotation side of the twisted side, the outer peripheral surface of the contact
The outer peripheral cutting edge having the same diameter or small diameter locus is formed
The above-mentioned twisted side and twisted groove allow the chip
To the periphery of the twisted side.
The radius of the surface decreases in the direction opposite to the direction of rotation
Using the flush bit that is configured to, hula
Perforate the outer plate with a flush bit and remove the flush bit.
Push into the inside of the flash panel structure and
Position the cutting blade at a height at which the outer plate can be cut.
While guiding the chips toward the contact area with the peripheral cutting blade,
Burrs generated on the outer plate should be exposed to the back side.
The abutting part was in contact with the frame of the flash panel structure
By moving the outer plate, the outer plate
Flash panel characterized by cutting out along the surface
This is a method of cutting out the outer plate of the metal structure.

In the second invention, the flash bit
Features that the cutting part is provided on both sides of the contact part
That, outside the flash panel structure according to the first invention
How to cut out boards.

(Operation) The flash bit used in the present invention includes a cutting portion composed of a spiral torsion side and a torsion groove, and a rotating side of the torsion side has an outer peripheral surface of an abutting portion. An outer peripheral cutting edge having essentially the same diameter or smaller diameter trajectory is formed.
Therefore, the inclination angle of the outer peripheral cutting edge can be formed as large as the spiral torsion side, and the clearance angle of the blade during cutting can be increased. Therefore, the use of the present invention
The flash bit to be used can reduce the cutting resistance applied to the flash bit as compared with the conventional flash bit, and can improve the sharpness of the blade. As described above, in the present invention
If so , the cutting resistance can be reduced, the outer plate can be smoothly cut out by high-speed rotation, and the generation of burrs can be suppressed, and the cut surface can be beautifully finished. In addition, when the cutting resistance applied to the flash bit is small, it is possible to suppress the wear of the blade, maintain the sharpness for a long time, and prevent the occurrence of material burn.

Furthermore, the chips after cutting are guided by the spiral sides and the spiral grooves formed in a spiral shape. Therefore,
By increasing the twist angle of the twist side, the capacity of the twist groove per unit length of the cutting part can be increased,
Further, since the chips are easily held, the chips are quickly guided without being clogged in the twist groove. Therefore, the flash bit according to the present invention can rapidly induce chips and reduce cutting resistance applied to the flash bit, thereby improving the sharpness of the blade.

[0010] Since the torsion sides and twisted grooves are configured to direct toward the contact portion of the chip during rotation, chips generated during cutting the frame side of the flash panel contact portion is located (inner side) Can be guided. Therefore, even if burrs are generated during cutting, the burrs appear on the back side instead of the front side of the outer plate, so that the cut surface can be finished more beautifully.

[0011] radius of the peripheral surface of the torsion sides, since the rotational direction is configured to be smaller toward the opposite direction,
The contact of the twisted side with the outer plate due to the high-speed rotation can be prevented . Therefore, the cutting resistance of the flash bit can be reduced, and the outer plate can be smoothly cut out by high-speed rotation.

[0012] Since are integrally formed by processing a single rod which is formed by a cemented carbide, even when the flush bit using continuous long term, from the contact portion flush bit body It will not come off . I
Therefore, than those formed by joining the abutment to the flush bit body by brazing or the like, and strength superior.

In the case where the cutting portion formed by the twisted side and the twisted groove is provided on both sides of the contact portion, two outer plates on both sides of the frame can be cut out at the same time. . Therefore, when cutting both sides, the working time required for the cutting process can be greatly reduced as compared with the case where the cutting portion is provided only on one of the contact portions.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a first embodiment of a flash bit used in the present invention, FIG. 2 is a plan view of the flash bit shown in FIG. 1, and FIG.
FIG. 4 is an enlarged end view of the flash bit shown in FIG.

[0015] flush bit 1 a is formed in the entire cemented carbide, and the bit body 2 a, provided at its distal end
Substantially composed of an abutting portion 3 a cylindrical which is. First, the contact portion 3a will be described. Abutment 3 a are those required for cutting along the outer plate of the flash panel on the inner wall surface of the frame, the outer peripheral surface 31 of the abutment 3 a is brought into contact with the frame of the flash panel. Further, in the approximate center of the upper surface of the contact portion 3 a, the peak portion 32 for insertion of the bit body 2 a by puncturing the outer plate is attached at the time of cutting.

Next, the bit body 2a will be described.
The bit main body 2a has a cutting portion 4 and a shank portion 5. Cutting unit 4 is configured to Article by grooves 42 twisted with each pair of twisted edges 41 that are configured in a spiral shape, during rotation so as to guide the chips toward the abutting portion 3 a in (arrow direction in FIG. 1) It has a left spiral.

In the present embodiment, the twisted side 41
Is set at about 20 ° with respect to the axis. The twist angle of the twist side 41 is appropriately set according to the material and thickness of the outer plate. However, damaged outer plate with flap becomes large front and back direction of the component force applied to the outer skin at the time of cutting and cutting resistance of flush bit 1 a is increased, also exceeds 40 ° is less than the twist angle of 5 ° Or, burrs may be generated and the cut surface may become unsightly. Therefore, the twist angle of the twist side 41 is 5 ° to 40 °.
The range of ° is preferred.

Further, the rotating side of the twisting side 41, an outer peripheral cutting edge 4 with a trajectory of the same diameter as the outer peripheral surface 31 of the abutment portion 3 a
11 are formed. Further, the radius of the peripheral surface of the torsion side 41 is configured to gradually decrease in the direction opposite to the rotation direction (see FIG. 3 ). That is, the outer peripheral surface of the torsion side 41 is first cut so that the radius of the outer peripheral surface becomes smaller at an inclination angle of about 18 ° with respect to the tangent of the outer peripheral cutting edge 411 to the outer peripheral cutting edge 411. In the opposite direction to the rotation direction, the cutting is further sequentially performed at an inclination angle of about 18 °, and finally, the end portion of the outer peripheral surface is cut so that the inclination angle is larger than 18 °.

In the present embodiment, the outer peripheral surface of the torsion side 41 is formed stepwise smaller several times at an inclination angle of about 18 °, but is not necessarily limited to the inclination angle and the number thereof. Instead, it can be formed smoothly in a curved shape.

In this embodiment, each of the pair of twisted sides 4
1 and the torsion groove 42 constitute two cutting portions 4, but the present invention is not limited to this, and three or more cutting portions 4 may be provided according to the material and thickness of the outer plate to be cut. it can.

Further , the flash bit 1a is obtained by cutting a single rod (not shown) made of cemented carbide. That is, first, a portion of the rod body where the cutting portion 4 is formed is cut to form the twist groove 42.
Then, the remaining portion formed by the torsion groove 42 is cut so that the radius of the peripheral surface thereof decreases stepwise in the direction opposite to the rotation direction, and the torsion side 41 is formed. Thereafter, the tip of the rod is cut to form a pointed head 32,
The formation of the flash bit 1a is completed. By adopting above-described forming process, flush bit 1a is
No seam is formed between the contact portion 3a and the bit body 2a.

[0022] (for work) 4 is a schematic explanatory view showing a state in which pulled off the skins using flash bits shown in FIG. 1, FIG. 5 in FIG. 4 B-B
It is an enlarged end view. Referring to FIGS. 4 and 5 illustrating the operation of the flush bit.

The outer panel 62 on one side of the flash panel 6 composed of a frame 61 and outer panels 62, 62 is attached to the frame 61.
To cut out along the inner wall surface 611, the following procedure is taken. First, the shank 5 of the flash bit 1 a is mounted on the chuck of the electric drill 7. Then, the flash bit 1a is driven to rotate, and the flash bit 1a is rotated.
A point a near the inner wall surface 611 of the frame body 61 is pierced by the pointed head 32 provided at the tip of a.

Next, the outer peripheral surface 31 of the abutment portion 3 a frame 61
The outer cutting edge 411 is brought into contact with the inner side surface 611 of the outer plate 62.
Flash bits required to the height position capable cutting 1 a
Is pushed into the flash panel 6. Then, while the electric drill 7 in a state of being perpendicular to the outer plate 62, is brought into contact with the outer peripheral surface 31 on the inner surface 611 of the frame 61, FIG. 4
The outer plate 62 is cut along the inner wall surface 611 of the frame body 61 by the outer peripheral cutting edge 411 and cut out.

[0025] Since the peripheral cutting edge 411 of the flush bit 1 a of this embodiment has a twist angle of approximately 20 °,
Compared to a conventional flash bit having only a tilt angle of about 5 °, the cutting force applied to the flash bit can be reduced, and the sharpness of the blade can be improved. Thus, flush bit 1 a, compared to the conventional, it is possible to smoothly cut-out of the outer plate 62 by high-speed rotation can be finished beautifully cutting surface by suppressing the generation of burrs.

In addition, since the cutting resistance is reduced,
It is possible to suppress the wear of the outer peripheral cutting edge 411 and maintain the sharpness for a long time, and it is also possible to prevent the occurrence of burning of the material.

Further, since the torsion side 41 and the torsion groove 42 are formed in a helical shape, the capacity of the torsion groove 42 per unit length of the cutting portion 4 is large, so that chips can be held as compared with the conventional flash bit. Cheap. Thus, the chips are derived quickly toward the abutting portion 3 a without clogging spiral flutes 42. Therefore, flash bit 1a is:
Induced chips rapidly can be reduced according cutting resistance to flush bit 1 a and, it is possible to improve the sharpness.

Furthermore, a groove 42 and twisted torsion sides 41, which is configured to direct toward the chip to the contact portion 3 a during rotation, chips generated during cutting are located the contact portions 3 a flash The panel 6 is guided to the frame 61 side (inside). Therefore, even if burrs are generated during cutting, the burrs are exposed not on the front side but on the back side of the outer plate 62, so that the cut surface can be finished more beautifully.

Further, since the radius of the peripheral surface of the torsion side 41 is configured to gradually decrease in the direction opposite to the normal rotation direction (see FIG. 3 ), the outside of the torsion side 41 due to the high-speed rotation is formed. it is possible to prevent contact of the plate 62, to reduce the cutting resistance of the flush bit 1 a, it is possible to smoothly perform the cut-out of the skin due to high speed rotation.

The cut-out work of the outer plate 62 in the flash panel 6, flush bit 1 is driven at high speed
This is performed in a state where the abutting portion 3a a contacts the frame 61 of the flash panel 6 . Therefore, the temperature of the contact portion 3a becomes considerably high due to friction with the frame 61 . However, since the flush bit 1a are integrally formed of cemented carbide, even when the flush bit 1a was used continuously extended period, never contact portion 3a is disengaged from the bit body 2a, for example, abutment flash bit of part 3 a is brazed
Door by remote, and strength better.

FIG. 6 shows a flash bit according to the present invention.
Perspective view of a second embodiment, FIG. 7 is a front view of a flush bit shown in FIG. 6, FIG. 8 is an enlarged plan view of a flush bit shown in FIG. 6, FIG. 9 is a right side view of a flush bit shown in FIG. 6 It is. The rear view of the flash bit is a front view (see FIG. 7 ), and the left side view is a right side view (see FIG. 9 ).
Appears the same as The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals. The description of the parts shown in the first embodiment will be omitted, and different points will be mainly described.

Reference numeral 1b denotes a flash bit according to the second embodiment. A cutting portion 8 is provided on the upper surface side of the contact portion 3b provided at the tip of the bit body 2a . The cutting part 8 is double-configured by a pair of spiral sides 81 and a spiral groove 82 each formed in a spiral shape,
It is a right spiral so as to guide chips toward the contact portion 3b during rotation (in the direction of the arrow in FIG. 6 ).

In the present embodiment, the twisted side 81
Is set at about 20 ° to the axis,
It is set appropriately according to the material and thickness of the outer plate. However, as described above, the twist angle is preferably in the range of 5 ° to 40 °.

On the rotating side of the torsion side 81, an outer peripheral cutting edge 811 having a locus having the same diameter as the outer peripheral surface 31b of the contact portion 3b.
Are formed. Further, the radius of the peripheral surface of the torsion side 81 is configured to decrease stepwise (divided into eight times in the present embodiment) in the direction opposite to the normal rotation direction.

On the tip side of the cutting portion 8, the torsion groove 8
Punching cutting blades 83, 83 for cutting the outer plate at the time of drilling are formed at the ends of the rotation directions 2 and 82. As shown in FIG. 8 , the upper surface side of the twisted side 81 is inclined in three steps at a required angle in a direction opposite to the rotation direction, and the upper surface portion 84, the middle surface portion 85, and the lower surface are rotated from the rotation direction. A part 86 is formed. The upper surface portion 84 and the middle surface portion 8
5, the lower surface portion 86 is positioned at a distance of 1 from a vertical surface orthogonal to the axis.
They are inclined at angles of 0 °, 20 °, and 45 °, respectively.
Also, the total length of the cutting portion 4, 8 is slightly short and small form than that of the flush bit 1 a cutting portion 4 shown in the first embodiment.

Since the flash bit 1b is obtained by cutting a single rod made of cemented carbide, the tip side of the torsion groove 42 and the base side of the torsion groove 82 are in contact with the contact portion 3b. However, there is no practical problem. Further, carbon tool steel, alloy tool steel, or the like conforming to the shape of the groove is brazed on the tip side of the torsion groove 42 and the base side of the torsion groove 82 on the contact portion 3b to fill the groove, or a brazing agent is used. The contact portion 3b can be formed flush by flowing the material itself and filling the groove. Further, like the flash bit 1a shown in FIG. 1 , the flash bit 1b can be formed such that the tip side of the twist groove 42 and the base side of the twist groove 82 do not touch the contact portion 3b .

(Operation) FIG. 10 is a schematic explanatory view showing a state where the outer plate is cut out using the flash bit according to the present embodiment.
Referring to FIG. 10 illustrating the operation of the flush bit.
The description of the same functions as those of the first embodiment will be omitted. The flash bit 1b has a contact portion 3
Since the cutting portions 4 and 8 are provided on both sides of the b in the longitudinal direction, two outer plates 62 on both sides of the frame 61 can be cut out at the same time. Therefore, when cutting both sides, the flash bit 1 a shown in the first embodiment is used.
The working time required for the cutting process can be greatly reduced by using.

Further, the torsion sides 81 and the torsion grooves 82 are configured to guide chips toward the contact portion 3b during rotation, like the torsion sides 41 and the torsion grooves 42, so that chips generated at the time of cutting are formed. Is guided to the frame 62 side of the flash panel 6 where the contact portion 3b is located. Therefore,
Even if burrs are generated during cutting, the burrs appear on the back side of the outer plate 62 instead of the front side, so that the cut surface can be finished more beautifully.

It should be noted that the terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0040]

The present invention has the above configuration and has the following effects. (A) The flash bit used in the present invention includes a cutting portion formed of a spiral twisted side and a twisted groove,
On the rotation side of the torsion side, an outer peripheral cutting edge having a locus substantially the same in diameter or diameter as the outer peripheral surface of the contact portion is formed. Therefore, the inclination angle of the outer peripheral cutting edge can be formed as large as the spiral torsion side, and the clearance angle of the blade during cutting can be increased. Therefore, the flash bit used in the present invention is
The cutting resistance applied to the flash bit can be reduced, and the sharpness of the blade can be improved. As described above, according to the present invention, the cutting resistance can be reduced, the outer plate can be smoothly cut out by high-speed rotation, and the cut surface can be beautifully finished while suppressing the generation of burrs. In addition, when the cutting resistance applied to the flash bit is small, it is possible to suppress the wear of the blade, maintain the sharpness for a long time, and prevent the occurrence of material burn.

(B) Since the chips after cutting are guided by the spirally formed twisted sides and the twisted grooves, by increasing the helix angle of the twisted sides, the chips are quickly clogged without being clogged in the twisted grooves. Can be induced.
Therefore, the flash bit according to the present invention can rapidly induce chips and reduce cutting resistance applied to the flash bit, thereby improving the sharpness of the blade.

[0042] (c) the twist side and twisted grooves are configured to direct toward the contact portion of the chip during rotation
Thus, chips generated during cutting can be guided to the frame body side (inner side) of the flash panel where the contact portion is located. Therefore, even if burrs are generated during cutting, the burrs appear on the back side instead of the front side of the outer plate, so that the cut surface can be finished more beautifully.

(D) The configuration is such that the radius of the peripheral surface of the twisted side decreases in the direction opposite to the direction of rotation.
Therefore , contact of the twisted side with the outer plate due to high-speed rotation can be prevented . Therefore, the cutting resistance of the flash bit can be reduced, and the outer plate can be smoothly cut out by high-speed rotation.

[0044] (e) What is integrally formed by processing a single rod which is formed by a cemented carbide
In, it even when the flush bit used continuously long period, the contact portion is disengaged from the flush bit body
No. Therefore, the strength is superior to that formed by joining the contact portion to the flash bit body by brazing or the like.

(F) In the case where the cutting portion constituted by the twisted side and the twisted groove is provided on both sides of the abutting portion, two outer plates on both sides sandwiching the frame are simultaneously cut out. be able to. Therefore, when cutting both sides, the working time required for the cutting process can be greatly reduced as compared with the case where the cutting portion is provided only on one of the contact portions.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a flash bit used in the present invention.

FIG. 2 is a plan view of the flash bit shown in FIG. 1;

FIG. 3 crosses the cutting part of the flash bit shown in FIG.
It is the enlarged end view.

FIG. 4 is a schematic explanatory view showing a state where an outer plate is cut out using the flash bit shown in FIG. 1;

FIG. 5 is a BB enlarged end view of FIG. 4 ;

FIG. 6 is a perspective view showing a second embodiment of the flash bit according to the present invention.

FIG. 7 is a front view of the flash bit shown in FIG. 6 ;

8 is an enlarged plan view of a flush bit shown in FIG.

FIG. 9 is a right side view of the flash bit shown in FIG. 6 ;

FIG. 10 is a schematic explanatory view showing a state in which an outer plate is cut out using the flash bit shown in FIG. 6 ;

FIG. 11 is a schematic perspective view showing a conventional flash bit.

[EXPLANATION OF SYMBOLS] 1 a, 1b flush bit 2 a bit body 3 a, 3b abutting portion 31 outer circumferential surface 32 apex head 4 cutting portion 41 twisted edges 411 peripheral cutting edge 42 twisted groove 5 shank portion 6 flash panel 61 frame Body 611 Inner wall surface 62 Outer plate 7 Electric drill 8 Cutting part 81 Twisted side 811 Outer peripheral cutting edge 82 Twisted groove 83 Perforated cutting blade 84 Upper surface part 85 Middle surface part 86 Lower surface part

Claims (2)

(57) [Claims] 1. A frame constituted by a frame (61) and an outer plate (62).
This is a method of cutting out the outer plate (62) of the lash panel structure (6).
What, processing the single rod formed by the cemented carbide
Abuts with the frame (61) that is integrally formed with the flash panel structure (6).
And a helical twisted side (41) and a twisted groove (42).
Cutting part am with (4), it includes a, the rotation side of the twist edge (41), the outer periphery of the abutment (3)
Outside having a trajectory of essentially the same diameter or diameter as the surface (31)
A peripheral cutting edge (411) is formed, and the twisted side (41) and the twisted groove (42 ) hit chips when rotating.
Is configured to direct toward the contact portion (3), the radius of the peripheral surface of the torsion sides (41), the direction opposite to the rotating direction
Flash configured to shrink toward
Using the bit (1) , pierce the outer plate (62) with the flash bit (1), and
Push the shvit (1) into the flash panel structure (6).
The outer peripheral cutting edge (411) is cut into the outer plate (62).
At the highest possible height and cut with the outer peripheral cutting edge (411).
While guiding debris toward the contact portion (3), the outer plate
Bring out the burr generated in (62) to the back side, and make the contact part contact the frame of the flash panel structure.
By moving the outer plate inside the frame,
A method for cutting out an outer plate of a flash panel structure , comprising cutting out along a wall surface . 2. The cutting part (4) of the flash bit (1) is in contact with the cutting part.
The outer panel of the flash panel structure according to claim 1, wherein the outer panel is provided on both sides of the portion (3).
Way.