JP2859167B2 - Gas pressure welding rod material cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, when the gas pressure
Te, about the bar cutting device <br/> for cutting metal rods rebar or the like.

[0002]

2. Description of the Related Art For example, metal bars such as reinforcing bars arranged in a predetermined shape when reinforced concrete is constructed are:
It has a fixed length that is easy to handle during manufacture or transportation, and is generally used after being cut to a required length at a construction site.

For example, when the length of reinforced concrete to be constructed is equal to or longer than the entire length of the reinforcing bar, the reinforcing bar is connected to the axial direction and used to extend to a required length. It is common that cutting is involved. In the case where a gas pressure welding method or the like is adopted in which the end faces of the reinforcing bars are pressed together with a predetermined force while being heated by a reducing flame gas frame or the like and pressed against each other, the strength and reliability of the connection portion are ensured. For this purpose, cutting is necessary because both end faces of the rebar to be connected are desirably flat and perpendicular to the axial direction of the rebar, and oxides are desirably removed.

[0004]

Therefore, in the case of cutting a bar material such as a reinforcing bar so that the end face is perpendicular and flat to the axial direction as described above, for example, the applicant of the present application has filed an application earlier. Japanese Utility Model Application No. 6-13382 (registered utility model gazette No. 301)
No. 0648), a bar gripped by a bar gripper is cut into an outer peripheral cutting edge (a cutting edge on the outer periphery defined by JIS B 0172 (an intersection line of a rake face and an outer peripheral flank)). ), And cutting is performed by a cutting machine provided with a disk-shaped rotary cutting tool that is driven to rotate about a rotation axis parallel to the axial direction of the bar. According to such a cutting method, since the bar is cut by the disk-shaped rotary cutting tool rotated in a plane perpendicular to the axial direction of the bar, the cut end surface is perpendicular to the axial direction. It becomes a flat surface.

However, even when a bar such as a reinforcing bar is cut by the above-described cutting method and joined by gas pressure welding, the joining end face, that is, the cut end face is perpendicular and flat in the axial direction. However, there has been a problem that the bonding strength varies and the reliability cannot always be sufficiently obtained. This is attributable to the formation of an oxide film on the cut end face. The cause of the oxide film is considered to be as follows.

That is, in the above-described cutting method, when the outer peripheral cutting edge of the disk-shaped rotary cutting tool is moved in a cutting groove formed in the rod while cutting the rod, the outer peripheral cutting edge is used. The chips generated by the cutting are moved in the cutting groove together with the outer peripheral cutting edge in a state of being housed in a chip pocket which is a space adjacent to the front of the outer peripheral cutting edge. The width of this chip (the length of the bar in the axial direction) is determined by the thickness of the tip of the outer peripheral cutting edge in the axial direction. Will rub the inner wall. Therefore, heat generated by friction between the chips and the inner wall surface of the cutting groove oxidizes the inner wall surface of the cutting groove, that is, the cut end surface.
In addition, even in the case of cutting other workpieces where oxidation of the cut end surface does not pose a problem, the cutting resistance is increased by friction between the expanded chip and the cut end surface, so that the efficiency of the cutting operation is relatively low. There is a problem that it becomes low.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for cutting a metal bar into a cut end face.
It is an object of the present invention to provide a gas pressure welding rod material cutting device capable of suitably suppressing generation of an oxide film in the gas pressure welding .

[0008]

Means for Solving the Problems In order to achieve such an object, the gist of the present invention is to provide an end portion of a metal bar.
Used for cutting process to cut for joining by gas pressure welding
(A) gripping the metal bar
A bar gripper to hold, and (b) a plurality of outer peripheral edge portions each having an outer peripheral cutting edge, and a plurality of chip pockets respectively containing cutting chips generated by the outer peripheral cutting edge of the plurality of outer peripheral cutting portions. includes forms a disc shape, the plurality of peripheral cutting portions, the peripheral cutting edge peripheral relief surface and located both ends of the peripheral cutting edge circumferential direction of the lateral clearance angle β and the radial direction
And a pair of side surfaces having a lateral clearance angle γ,
Yes a first peripheral cutting edge portion a plurality of first ridge has been removed between one peripheral relief surface thereof a pair of side surfaces, the first edge portion
Between the outer peripheral flank and the other of the pair of side surfaces
A disk-shaped rotary cutting tool comprising a plurality of second outer peripheral edge portions from which the second ridge is removed , and (c) the disk-shaped rotary cutting
With a tool at one end, it was gripped by the bar gripper
To cut the metal bar by cutting,
Rotate the disk-shaped rotary cutting tool around the rotation axis parallel to the direction
A longitudinal cutting machine with a motor for driving; (d)
The cutting device is provided between the bar gripper and the cutter.
The disk-shaped rotary cutting tool provided at one end of the cutter is
A tool that guides the cutter to approach the metal bar
A guiding device .

[0009]

[Function] In this way, the rod is gripped by the bar gripper.
To join the ends of the metal bar
In a bar cutting device for cutting,
Rotate around the axis of rotation parallel to the axis of the metal bar
A plurality of peripheral cutting edge portion of the disk-shaped rotary cutting tool to be driven, the outer
Circumferential clearance, circumferential clearance angle β in the circumferential direction and lateral clearance in the radial direction
A pair of side surfaces having an angle γ, a first outer peripheral edge portion from which the first ridge is removed, and a first ridge having the first ridge.
And a second outer peripheral edge portion having a second ridge portion removed on the opposite side, and a motor provided in the cutting machine.
Ru is driven to rotate Te. Therefore, using this bar cutting device
When cutting a metal bar by using a disk-shaped rotary cutting
Outer peripheral cutting edge of the tool, the outer peripheral cutting edge of the first outer peripheral edge portion ,
While the portion corresponding to the first ridge in the cutting groove formed in the metal bar is cut off , the outer peripheral cutting edge of the second outer peripheral cutting portion is
And leave a portion corresponding to the second ridge in the cutting groove of
Any one of the first outer peripheral edge portion and the second outer peripheral edge portion
The peripheral cutting edge is also used exclusively for cutting the uncut part of the other peripheral cutting edge
Will be removed .

[0010]

As described above, when cutting is performed by the respective outer peripheral cutting edges of the first outer peripheral edge portion and the second outer peripheral edge portion.
In addition, the width of the generated chips (that is, the length in the axial direction) is the axial length of the cylindrical locus formed by the plurality of outer peripheral cutting edges of the first outer peripheral edge portion and the second outer peripheral edge portion, that is, Because it becomes smaller than the width of the cutting groove formed in the material to be cut, even if the generated chips are expanded by heat generated during cutting,
Friction between the chips and the inner wall surface of the cutting groove when being accommodated in the chip pocket and moved in the cutting groove is suitably suppressed. Therefore, when cutting the metal bar , oxidation of the inner wall surface of the cutting groove, that is, the cut end surface due to friction between the chips and the inner wall surface of the cutting groove (that is, formation of an oxide film) is suppressed, and cutting is performed exclusively. The cutting resistance is reduced as compared with a conventional disk-shaped rotary cutting tool that generates chips having a width equal to the width of the groove, so that the cutting operation can be performed more efficiently. And if you do the above,
Relatively high bonding when metal bars are connected by gas pressure welding
Strength can be obtained. This is the cut end of a metal bar
The formation of an oxide film on the surface is suppressed and the disk shape
The axis of rotation of the rotary cutting tool is parallel to the axis of the metal bar
The metal bar is cut by gas pressure welding.
In addition to being flat and perpendicular to the preferred axial direction,
The first outer peripheral edge and the second outer peripheral edge alternate in the circumferential direction
When joining by gas pressure welding etc.
Fine irregularities are cut to obtain high bonding strength
It is considered that it is formed on the end face.

[0011]

[0012]

[0013]

[0014]

[0015]

Here, preferably, (e) the first outer peripheral edge portion and the second outer peripheral edge portion are alternately arranged in a circumferential direction. With this configuration, the uncut portion formed on the workpiece by one of the first outer peripheral edge portion and the second outer peripheral edge portion is immediately removed by the other outer peripheral edge portion provided subsequently. Therefore, the width of the generated chips is more reliably reduced as compared with the case where one or both of the first outer peripheral edge portion and the second outer peripheral edge portion are continuously provided. .

[0017]

[0018]

Preferably, the tool guide device is provided with
The disk-shaped rotary cutting tool provided at one end of the cutting machine
Move the cutting machine to its length so as to approach the metal bar.
It guides linearly along the direction. in this way
Then, in the bar cutting device, a disk-shaped rotary cutting tool is used
Is provided with a tool guiding device that guides linearly toward
You. Therefore, the disk-shaped rotary cutting tool is
Can be adjusted, it is necessary to secure the turning angle of the cutting machine.
No longer necessary, cut relatively closely spaced bars.
It is also possible to refuse.

Preferably, the cutting machine is provided with the cutting machine.
The motor has a peripheral speed of the outer peripheral cutting edge of about 10 (m / s).
So that the disk-shaped rotary cutting tool is driven to rotate.
is there. In this way, the peripheral speed of the outer peripheral cutting edge is 10 (m /
s) Since the disk-shaped rotary cutting tool is driven to rotate to about

Incidentally, for example, the above-mentioned Japanese Utility Model Application No. 6-1338.
No. 2 (Registered Utility Model Publication No. 3010648) and the like, a cutting machine provided with a disk-shaped rotary cutting tool is rotated around a rotation axis parallel to the axial direction of the bar. By moving the disk-shaped rotary cutting tool toward the bar, the cutting is performed. It is necessary to make the rotation angle large enough to secure a sufficient rotation angle, and there is a problem that the method cannot be applied to the cutting of a rod material which is arranged relatively densely.

[0022]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 are views showing the entirety of a bar cutting apparatus 10 provided with a disk-shaped rotary cutting tool 16 according to an embodiment of the present invention. FIG. 1 is a sectional view taken along line IV-IV in FIG.
It corresponds to a sectional view. As shown in FIG. 1, the bar cutting device 10 includes a bar gripper 14 that grips a bar 12 a such as a reinforcing bar to be cut in a predetermined posture, and a bar gripper 14.
And a longitudinal cutting machine 18 for cutting the gripped bar material 12a and the like by a disk-shaped rotary cutting tool 16 built in one end. In this embodiment, the bar 12a corresponds to the material to be cut.

As shown in FIG. 3, the bar gripper 14 has a receiving portion 20 having a longitudinal shape and a hook shape at one end.
A pressing member 28 rotatably attached to a base 24 of the receiving portion 20 of the main body 22 by a bolt 26 around its axis, and one end at an intermediate portion in the longitudinal direction of the pressing member 28. A connecting member 32 which is relatively rotatably attached by a pin 30 at a portion thereof, and a rotatable member which has a longitudinal plate shape and is relatively rotatably attached at one end to the other end of the connecting member 32 by a pin 34. Member 3
6 and an adjusting bolt 40 which is provided at the other end of the main body 22 and stores the other end of the rotating member 36 and is screwed from the other end. . In this embodiment, the turning member 36 serves as a first turning member, the connecting member 32 serves as a second turning member, and the bolt 26
Corresponds to the first rotation axis, the axis of the pin 30 corresponds to the third rotation axis, and the axis of the pin 34 corresponds to the fourth rotation axis.

As shown in FIGS. 3 to 5, the main body 22 is provided with the storage portion 38 on one surface of the other end opposite to the cutting machine 18, and has one end of a longitudinal guide member 42. The receiving portion 20 is fixed to the side surface of the base portion 24 by welding or the like. The pressing member 28, the connecting member 32, the rotating member 36, and the adjusting bolt 40
As is clear from FIG. 5, all are located on the same surface side as one surface on which the storage portion 38 of the guide member 42 is provided.

As shown in FIG. 4, the guide member 42 has a substantially rectangular cross section perpendicular to the longitudinal direction, and the other end portion (housing portion) of one side (upper side in FIG. 3) in the longitudinal direction. In the vicinity of the portion provided with the gear 38, a rack gear 4 meshed with a pinion gear 168 described later is provided.
4 are provided. Further, the other side surface is formed so as to protrude to the side surface by reducing the width from one surface in which the storage portion 38 is provided over the entire length in the longitudinal direction to approximately half the position in the thickness direction. A step 46 is provided.

Further, as shown in FIG.
2 has a bottomed hole 48 having a length extending from the other end surface on the side of the adjustment bolt 40 to substantially the entire length in the longitudinal direction. The compression spring 50 is housed in the bottomed hole 48, and the storage portion 38 is provided. On one surface opposite to the surface provided with a hole, there is provided a long hole 52 whose length and width are both sufficiently shorter than the bottomed hole 48 and communicate with the bottomed hole 48. The compression spring 50 is used to connect the cutting machine 18 to the bar gripper 1
By urging the rod 4 in a direction away from the bar 12a, an appropriate movement resistance is given at the time of a cutting operation in which a cutting machine 18 described below is moved to the bar 12a side, and the bar 12a is cut slowly. The purpose is to suppress damage to the disk-shaped rotary cutting tool 16 and to return the cutting machine 18 to the original position immediately after the end of cutting to obtain high working efficiency.

The receiving portion 20 has a receiving surface 54a extending from the base 24 in parallel with the longitudinal direction of the guide member 42 and extending in its thickness direction, that is, in a direction perpendicular to the plane of FIG.
The receiving surface 54a faces the end surface of the guide member 42 in a direction facing the end surface.
And a pair of receiving surfaces 54a and 54b (hereinafter, simply referred to as receiving surfaces 54 when not particularly distinguished). That is, the pair of receiving surfaces 54a, 54
b is formed so that an intersection line of a plane including each of the longitudinal directions extends in the thickness direction of the guide member 42, and is provided at one end of the bar gripper 14 so as to protrude in a hook shape. Receiving part 2 having a pair of receiving surfaces 54a and 54b
0 is provided.

The pressing member 28 has a plate-like portion 55 attached to the base 24 by the bolt 26 at one end thereof, and a plate-like portion 55 at the other end of the plate-like portion 55 opposite to the bolt 26. Thickness direction, ie, bolt 26
Pressing portion 56 formed in a rectangular parallelepiped shape extending in the axial direction of
And The axial direction of the bolt 26 is parallel to the intersection line. That is, the receiving surface 54 and the pressing portion 56 are provided such that their axial directions are parallel to each other, and the pressing surface 58 and the receiving surface 54 which are one surface of the pressing portion 56 facing the intersection line side are provided. Bar 12a between
Is gripped.

The connecting member 32 has a longitudinal shape, and is attached to the pressing member 28 and the connecting member 32 by the pins 30 and 34 at one end and an intermediate portion, respectively. The cross section has a U-shape as shown in FIG. 5, and the middle part of the pressing member 28 and one end of the rotating member 36 are sandwiched from both sides in the thickness direction, and the other end in the longitudinal direction is The pivoting operation lever 60 extending in the longitudinal direction is fixedly mounted. The pivot operation lever 60 is moved between the fixed operation position shown in FIG.
The rotation operation is performed around the vicinity as a rotation center.

Returning to FIG. 3, the adjusting bolt 40 is provided on the end face of the other end of the rotating member 36 opposite to the pin 34.
And a projection 62 is formed at the end of the other end surface on the rack gear 44 side in the width direction toward the adjustment bolt 40. On the other hand, as is clear from FIGS. 4 and 5, the entirety of the storage section 38 on the guide member 42 has a substantially rectangular parallelepiped shape.
A female screw hole 64 into which the adjusting bolt 40 is screwed is provided at an end on the adjusting bolt 40 side, and an intermediate portion in the thickness direction is removed from the end on the connecting member 32 side except for the side surface on the rack gear 44 side. As a result, a storage groove 66 for storing the other end of the rotating member 36 is provided. Therefore, the protrusion 62 of the rotating member 36
Is movable only between the side surface of the storage section 38 on the rack gear 44 side and the tip of the adjustment bolt 40.

The guide member 42 is provided at the end of the upper surface of the storage portion 38 (the surface opposite to the guide member 42) on the side of the connecting member 32 on the side surface of the storage portion 38 on the side of the stepped portion 46. It is formed so as to be separated from the side surface of the storage portion 38 toward the pin 34 in the longitudinal direction of the rotating member 36 so as to limit the amount of movement of the rotating member 36 to the side of the storage portion 38. A supporter 68 having a projection (not shown) is fixed by a bolt 70. The tip of the bolt 70 protrudes into the storage groove 66 of the storage section 38, and is formed by a notch 72 provided on the side surface of the rotating member 36 on the rack gear 44 side and the remaining side surface of the storage section 38. It is located between.

For this reason, the rotating member 36 is moved in the longitudinal direction by positioning the other end on the adjustment bolt 40 side between the adjustment bolt 40 and the bolt 70 fixing the supporter 68. The amount is limited, and the protrusion 62 provided at the other end as described above is located between the tip of the adjustment bolt 40 and the remaining side surface of the storage portion 38, and is perpendicular to the longitudinal direction. The amount of movement in any direction is limited, and the pivot can be rotated about the center of the distal end face of the adjustment bolt 40 as the rotation center without falling out of the storage section 38. That is, in the present embodiment, the center of the tip surface of the adjustment bolt 40 corresponds to the second rotation axis, and the rotation member 36 is substantially provided on the main body 22.

One end of a tension spring 74 is hung on a bolt 70 fixing the supporter 68,
When the other end of the tension spring 74 is hung on a bolt 76 erected near the pressing portion 56 of the pressing member 28, the pressing surface 58 of the pressing member 28 is moved according to the restoring force of the tension spring 74. , I.e., in the clockwise direction about the bolt 26 in FIG. For this reason, when gripping the rod 12a, the rotation operation lever 60 is always located at the release operation position R, and the gripping operation is facilitated. The receiving surface 54b is, as shown in FIG.
Although it is formed so as to protrude more toward the cutting machine 18 than a.
The upper end surface of the receiving surface 54b on the cutting machine 18 side corresponds to the lower surface position of the disk-shaped rotary cutting tool 16, and the gripped rod 12a
3 shows the cutting position. In FIG. 1 and FIG. 3, reference numeral 78 designates a portion which is attached to an intermediate portion of the adjusting bolt 40 in order to directly read the amount of screwing of the adjusting bolt 40, so that the amount of screwing of the adjusting bolt 40 is changed and the axis of the adjusting bolt 40 is changed. The pointing member is moved in the direction.

On the other hand, as shown in FIGS. 1 to 3, the cutting machine 18 has a power supply cord 80 and a switch 82, and also serves as a grip portion, and is attached to the motor 84 to drive the motor 84. And a housing 86 made of, for example, a light alloy (for example, an aluminum alloy or an aluminum die-cast) for accommodating the disk-shaped rotary cutting tool 16 rotated by the above.

The rotary cutting tool 16 is shown in FIGS.
As shown in an enlarged manner in (c), a notch is provided on a disk-shaped base material provided with a plurality of (32 in this embodiment) notches 194 extending from the outer peripheral end face toward the rotation axis. 194
An outer edge portion 196 made of a tip made of, for example, a cemented carbide is fixed to the rear side of each rotation direction (direction of arrow A in the figure) at a predetermined interval by brazing or the like. Are deposited on the entire surface by ion plating or the like. The disk-shaped base material is, for example, an SKS51 having a diameter of 135 mm and a thickness of about 1 mm.
Alloy tool steel. In this embodiment, the notch 194 corresponds to a chip pocket.

On the other hand, the outer peripheral edge portion 196 is, for example,
It has a substantially rectangular parallelepiped shape with a circumferential width of 2.0 mm, an axial thickness of 1.4 mm, and a radial length of about 5.0 mm, with an outer clearance angle α of about 8 °. Face 198, a rake face 200 having a rake angle of 0 °, and these outer peripheral flank faces 19
8 and a pair of side surfaces 204a, 204b located at both ends in the axial direction of the outer peripheral cutting edge 202 formed by the intersection of the rake face 200 (hereinafter, when there is no need to distinguish between them). Simply referred to as a side surface 204). Each of the pair of side surfaces 204a and 204b has a lateral clearance angle β = 1 ° in the circumferential direction and a lateral clearance angle γ =
It is formed in about 36 '.

The outer peripheral edge portion 196 is provided between the outer peripheral flank 198 and one side surface 204a.
A plurality of first outer peripheral edge portions 196a having the first C surface 208 from which the 06 has been removed, the outer peripheral flank surface 198 and the other side surface 20
4b (ie, located on the opposite side of the axial direction from the first ridge 206) in the second C
The second outer peripheral edge portions 196b having the surface 212 are arranged alternately in the circumferential direction.

Each of the outer peripheral cutting edges 202 has the first ridge 206 and the like removed as described above.
As shown in, the axial direction length of the cylindrical path (not shown) formed by a plurality of peripheral cutting edge 202 W shorter than _B, that, peripheral cutting of the first outer peripheral edge portion 196a blades 2
The second outer peripheral edge portion 196 has a length from the other side surface 204b to an intermediate portion in the axial direction of the cylindrical locus.
The outer peripheral cutting edge 202b of b has a length from one side surface 204a to an intermediate portion in the axial direction of the cylindrical locus.
The size of each of the first C surface 208 and the second C surface 212 is, for example, about C0.4 (mm). FIG. 6 (c) shows the outer blade 196 viewed from the direction of arrow c in FIG. 6 (a) with the base material omitted.
In addition, the clearance angle α, the size of the first C plane 206, and the like are exaggerated for the sake of explanation.

Returning to FIG. 1, the housing 86
As shown in FIGS. 1 and 3, a cover 88 made of the same light alloy as the housing 86 and covering the disk-shaped rotary cutting tool 16 on one surface of the bar gripper 14 is provided.
1 and 2, a bearing case 92 is mounted on one surface opposite to the cover 88 by four bolts 94. As shown in FIG. As shown in FIG. 2, the housing 86 and the cover 88 each include a bar 1 gripped by the receiving portion 20 and the pressing member 28 of the bar gripper 14.
A U-shaped notch 98 is provided in a part of the 2a side,
The disk-shaped rotary cutting tool 16 is partially exposed. The knob 96 provided in the housing 86
When replacing the disk-shaped rotary cutting tool 16, etc.,
It is operated to stop the rotation.

The inside of the housing 86 has the structure shown in the sectional view of FIG. Output shaft 1 of motor 84
02, a helical gear 104 is attached. The helical gear 104 is a helical gear 1 attached to one end of a transmission shaft 106 provided in parallel with the output shaft 102.
08. The transmission shaft 106 is supported by a total of three bearings 110 inserted into the shaft portion, one at the one end and the other at the other end, and has a bevel gear at the other end. .

In front of the bevel gear of the transmission shaft 106,
A rotating shaft 114 supported by a pair of bearings 112, 112 is provided perpendicular to the transmission shaft 106, and a bevel gear 116 meshed with the bevel gear of the transmission shaft 106 is mounted on the shaft portion. Have been. On the outer peripheral surface of the bevel gear 116, there are provided about two to four bottomed holes 118 extending in the axial direction of the rotating shaft 114. The bottomed hole 118 is fitted with a rotation stop pin 122 fixed to the knob 96, and the rotation stop pin 122 is provided with a spring 124 provided between the housing 86 and the knob 96. It is always located apart from the outer peripheral surface of the bevel gear 116 by the force.

A cylindrical cutter flange 126 having a large diameter portion is fitted and attached to the tip of the rotary shaft 114 to a position where it contacts the bearing 112 located on the upper side in FIG. Cutter flange 1
The disk-shaped rotary cutting tool 16 is attached to one surface of the plate 26 opposite to the upper bearing 112 by being clamped by a disk-shaped flange 128 having a through hole in the center. The screw is screwed to the rotating shaft 114. The cutter flange 12
6, one pin 132 is press-fitted, and the one pin 1 is inserted into the disc-shaped rotary cutting tool 16 and the flange 128.
By inserting the pin 132 into the through hole provided corresponding to the hole 32, the relative rotation between the disk-shaped rotary cutting tool 16 and the cutter flange 126 is prevented.

The three bearings 110 fitted to the transmission shaft 106 are fixed by cylindrical spacers 134 and 136, a collar 138, and a flat bar 142 which is fastened and fixed by the bolt 140 to fix the collar 138. The spacing and position of each other is kept constant.
The rotation of the rotary shaft 114, the cutter flange 126, the bevel gear 116, and the transmission shaft 106 and the helical gear 108 are prevented from rotating relative to each other by keys (not shown).

Also, as shown in FIGS. 1 and 4, the cover 88 has an adjust bolt 40 extending in the longitudinal direction of the guide member 42 of the bar gripper 14 from the center thereof, as shown in FIGS. And a pair of guide walls 144 extending toward the bar gripper 14 so as to cover the rack gear 44 and the stepped portion 46 on both sides thereof.
146 are provided. These pair of guide walls 14
4, 146, one of the guide wall portions 144 located on the side of the stepped portion 46 has an upper end formed by the stepped portion 4 of the guide member 42.
6 is relatively low so as to be substantially at the same position as one surface of the storage portion 38 side, but the other guide wall portion 146 has its upper end in the thickness direction of the guide member 42 excluding the storage portion 38. Is formed relatively high so as to be substantially at the same position as the upper end of the.

The upper end surfaces of the guide walls 144 and 146 are shown in plan view in FIG. 3 and in cross section in FIG.
A pair of back plates 148 and 150 similar to that of No. 6 are fixed by a plurality of bolts 152, respectively. One back plate 148 fixed to the guide wall 144 has a width slightly larger than the width of the upper end surface of the guide wall 144 so that it protrudes from the upper end to the guide wall 146 side. Installed. As shown in FIG. 3, the other back plate 150 has a protruding portion 154 formed at a middle portion in the longitudinal direction so as to protrude to the opposite side to the back plate 148, but other portions are the back plate 148. And is mounted so as to protrude from the guide wall portion 146 toward the guide wall portion 144 by the same width direction size as the back plate 148.

That is, the guide walls 144 and 146 and the back plates 148 and 150 are provided so as to be in close contact with the outer peripheral surface of the guide member 42 of the bar gripper 14, whereby the guide walls 144 are provided. The guide member 42 and the like are immovable relative to each other in a direction perpendicular to the longitudinal direction.
That is, the disk-shaped rotary cutting tool 16 is configured to move the bar 1 in the longitudinal direction of the guide member 42, that is, the bar 1 gripped by the bar gripper 14.
2a only in a direction that approaches or separates linearly (ie, along the longitudinal direction of the cutting machine 18).
And are relatively movable. In the present embodiment, a moving member is constituted by the guide walls 144, 146 and the back plates 148, 150, and the tool guide device constituted by the moving member and the guide member 42 is a bar-gripping machine. 14 and a cutting machine 18.

As described above, the compression spring 50 is provided in the bottomed hole 48 of the guide member 42. The end faces of the guide walls 144 and 146 on the adjustment bolt 40 side are not shown. As shown in FIG. 3 and FIG. 5, a thin plate-shaped end plate 156 is attached by two bolts 158, 158, the ends of which are closed, and is located between the guide walls 144, 146. Pin nut 1
60 is fixed to the end plate 156 by bolts 162. The compression spring 50 is pressed toward the receiving portion 20 by the end plate 156 in a state where the end on the adjustment bolt 40 side is fitted to the pin nut 160, whereby the cutting machine 18 Part 20
That is, it is constantly urged in the direction away from the bar 12a gripped by the bar gripper 14.

The pin 164 erected from the cover 88 toward the guide member 42 is to be engaged with the elongated hole 52 provided in the guide member 42.
Accordingly, relative movement between the cutting machine 18 and the bar gripping machine 14 is limited to a range in which the pin 164 abuts on both ends of the elongated hole 52 in the longitudinal direction, so that unnecessary relative movement is prevented. Note that the U-shaped notch 98 has a distance from the disc-shaped rotary cutting tool 16 side surface of the gripped bar 12a to the bottom of the U-shape, rather than the above-described movement amount of the cutting machine 18. It is formed so as to be slightly larger, thereby preventing interference between the bar 12a and the housing 86 and the cover 88 at the time of cutting.

On the other hand, as shown in FIGS. 1 and 4, the projecting portion 154 of the back plate 150 and the guide wall portion 146 are formed.
A pinion gear 168 engaged with the rack gear 44 of the guide member 42 is provided between the lower end of the guide member 42 and a protrusion 166 provided in the same direction in a plane parallel to the protrusion 154. 154,166
Is provided so as to be rotatable around its axis by a pin 170 in a state sandwiched between them. The pinion gear 168 has a shape in which a circular plate member is cut by two planes parallel and perpendicular to the longitudinal direction of the back plate 150 as shown in FIG. An arc-shaped notch 172 is provided at a corresponding portion of the guide wall 146.

Further, the projecting portion 1 of the pinion gear 168
A female screw hole 174 having a bottom from the other end face located on the end plate 156 side is provided at an end on the tip end side of the end plate 156 so that the axial direction is parallel to one end face on the end side. A feed lever 176 for rotating the pinion gear 168 is screwed into the female screw hole 174. Therefore, the feed lever 176 is
When rotated about 0, the cover 88 and the guide member 42 are engaged based on the engagement between the pinion gear 168 and the rack gear 44.
Are relatively moved. Therefore, bar material 1
When cutting the 2a, the disk-shaped rotary cutting tool 16 is directed toward the bar 12a only by rotating the feed lever 176 clockwise in FIG. 3 around the axis of the pin 170. Therefore, the rack gear 44, the pinion gear 168, and the feed lever 176 function as a booster, so that the disk-shaped rotary cutting tool 16 can be moved more easily, and the bar 12a can be cut more easily. it can. In this embodiment, the feed lever 176 corresponds to an operation member.

As shown in FIG. 5, the housing 86 and the cover 88 are provided on the outer peripheral side of the disk-shaped rotary cutting tool 16 with side walls 178 and 181 protruding in opposite directions. By making the tips of the 180 abut against each other, a substantially closed space is formed in the housing 86. This side wall portion 178, 1
80 is provided along the outer peripheral surface of the disk-shaped rotary cutting tool 16 in most parts including the receiving part 20 side in which the U-shaped notch 98 is provided, and has a side wall part 17.
8 and 180 have a minimum necessary size that does not interfere with the outer peripheral surface of the disk-shaped rotary cutting tool 16.

In the U-shaped notch 98, the side wall 180 on the cover 88 side has the same side wall height as the other parts, but the side wall 178 of the housing 86.
The side wall 178 and the disk-shaped rotary cutting tool 16 are formed by lowering the height of the side wall by a predetermined amount (for example, about 3 mm) than the other parts and providing a gap between the cover 88 and the housing 86. Interference is prevented. Since the size of this gap is kept to a minimum necessary size, the side wall portion 178 formed on the side of the housing 86 in the cutout 98 is formed by cutting pieces generated by cutting the bar 12a. It acts as a cut piece stopper that prevents it from entering the inside 86. Therefore, even when the cut piece has a relatively thin coin shape, intrusion into the housing 86 is suitably suppressed, and even when the bar member 12a is a metal bar member such as a rebar, Breakage of the outer peripheral edge portion 196 of the cutting tool 16 can be suitably suppressed.

Further, at the lowermost portion in FIG. 3 of the side wall portions 178 and 180 of the housing 86 and the cover 88, a chip discharge port 182 projecting to the outer peripheral side is formed. Neither side wall portions 178, 180 are provided on the distal end surface 184 of the chip discharge port 182,
Chips generated when cutting the bar 12 a with the disk-shaped rotary cutting tool 16 are discharged from the front end surface 184. A chip storage bag 186 as shown in FIG. 7 is attached to the chip discharge port 182 at an opening 188 provided at one longitudinal end thereof as shown in FIG. In addition, chips generated by the cutting operation are collected. The chip storage bag 186 is configured to have a capacity of, for example, about 1000 cm ³ (about 600 g in terms of chip weight) by, for example, heat-resistant fibers having air permeability, and burns the operator due to chips that become hot. It is designed to suppress the inhalation of dust and dust, etc., and to enhance work safety. Its heat resistance is sufficient to withstand the temperature of the stored cutting chips (for example, when cutting iron material, it reaches about 300 ° C). It is supposed to gain. Note that a fastener 190 is provided on one side in the longitudinal direction of the chip storage bag 186, and chips accumulated in the bag are opened and processed.

The bar cutting apparatus 10 configured as described above
An operation of cutting a bar material (for example, a steel bar SD345 for reinforced concrete stipulated in JIS G 3112) 12a or the like, such as a reinforcing bar, which is constructed so that the axis thereof is in a vertical direction, will be described below. The bar 12a such as a reinforcing bar is cut perpendicularly and flatly in an axial direction suitable for gas pressure welding when connecting another bar such as a reinforcing bar (not shown) in a vertical direction. This is performed for the purpose of obtaining the removed end face, or for aligning the axial length with a plurality of bars 12b, 12c, etc., which are constructed adjacently as shown in FIG.

First, the receiving portion 20 of the bar gripper 14 is set in FIG.
The bar 12 adjacent to the bar 12a to be cut shown in FIG.
c, and is further moved toward the bar 12a, whereby the receiving surface 54b is positioned on the back side (the side opposite to the side where the main body of the bar cutting device 10 is located). At this time, the turning operation lever 60 of the bar material gripping machine 14 is
Is rotated from the fixed operation position H in the counterclockwise direction to the release operation position R. With the rotation of the rotation operation lever 60 counterclockwise, the rotation member 38 is adjusted. The pressing member 28 moves around the center of the tip end surface of the bolt 40 (that is, the second rotation axis) and around the axis of the bolt 26 (that is, the first rotation axis) in the clockwise direction from the position shown in the figure. The pin 34 is rotated, and the axis of the pin 34 (the fourth rotation axis) is determined from a straight line connecting the center of the tip end surface of the adjustment bolt 40 (the second rotation axis) and the axis of the pin 30 (the third rotation axis). Dynamic axis) has been removed.

The bars 12a, 12b, 12 to be cut are
It is sufficient that the distance between the bars c and the like is large enough to allow the receiving portion 20 to be inserted therebetween, and the distance d between the bars 12a, 12b, and 12c shown in FIG.
As long as it is larger than the maximum width 0 (the width in the longitudinal direction of the cutting machine 18 and the guide member 42) D, the work by the bar cutting device 10 of this embodiment is possible.

As described above, the receiving surface 54b is connected to the bar 12a.
After the rotary operation lever 60 is rotated clockwise in FIG. 3 to the fixed operation position H, the rotation member 38 and the pressing member 28 are moved in the opposite direction, that is, leftward. The pins 30 and 3 are rotated in the
The rod 12a is squeezed by the pressing portion 56 and the receiving portion 20 in a state where the shaft center of No. 4 and the center of the tip end surface of the adjustment bolt 40 are located on a straight line. As a result, as shown in FIG. 1, the rod 12 a has its axial direction oriented in the longitudinal direction of the receiving portion 20 (direction of the line of intersection of the receiving surfaces 54 a and 54 b), that is, the axial direction of the disk-shaped rotary cutting tool 16. It is gripped in a state that matches the direction.

The bar gripper 14 has a receiving portion 20 in which a receiving surface 54b (ie, at least a part of the pair of receiving surfaces 54a, 54b) is positioned on the back side of the bar 12a, and a front side of the bar 12a. And the pressing portion 56 having the pressing surface 58 positioned at the second position, the one receiving surface 54b of the receiving portion 20 is positioned on the back side through the side of the bar 12a, and Is pressed from its front side toward its receiving surface 54 by the pressing portion 56, so that even when the bars 12 are relatively densely arranged as shown in FIG. You can.

As is clear from the above description, at the release operation position R of the rotation operation lever 60, the connecting member 32 is located at the release position where the rod 12a is not gripped by the pressing member 28, and FIG. In the fixed operation position H of the rotation operation lever 60 shown in FIG. 7, the connecting member 32 is positioned at a fixed position where the rod 12a is gripped by the pressing member 28.

In the above state, the pressing member 28
Is urged in the clockwise direction in the figure by the urging force of the tension spring 74 and the reaction force given by the bar 12a, but as described above, the center of relative rotation with the connecting member 32 (the axis of the pin 30) Center), the relative rotation center of the connecting member 32 and the rotation member 38 (the axis of the pin 34), and the rotation center of the rotation member 38 (the center of the distal end surface of the adjustment bolt 40) are aligned. Therefore, the urging force and the reaction force are all received by the bolt 26 and the adjustment bolt 40. Therefore, the pressing member 28
Is fixed to the position where the bar 12a shown in FIG. 3 is gripped, and the bar 12a is securely gripped.

When the diameter of the bar 12a is different, the amount of rotation of the rotation operation lever 60 becomes excessive as compared with the state shown in FIG. 3, and the three points are not located on a straight line. In this case, the bar 12a cannot be gripped, but in this case, the screwing amount of the adjusting bolt 40 is changed according to the diameter to thereby fix the fixing operation position H.
In the above, the three points can be positioned on a straight line.
Therefore, within the range in which the screwing amount of the adjustment bolt 40 can be changed, the rod 1 having various diameters can be used.
2a can be gripped.

As described above, the bar 12a is
After the switch 82 is operated to rotate the disk-shaped rotary cutting tool 16 in the direction of arrow A shown in FIG. 2 at a speed of, for example, about 1400 rpm, the feed lever 176 is When the pinion gear 168 is rotated in the clockwise direction in FIG. 3, the cover # 88 to which the pinion gear 168 is attached is rotated based on the engagement between the pinion gear 168 and the rack gear 44.
That is, relative movement between the cutting machine 18 and the guide member 42 provided with the rack gear 44, that is, the bar gripping machine 14 is performed. At this time, as described above, the relative movement direction between the guide member 42 and the cutting machine 18 is limited to a direction that linearly approaches or separates from the bar 12a, and the bar gripper 14 is erected. The cutting machine 18, that is, the disk-shaped rotary cutting tool 16, is linearly directed toward the bar 12 a by the rotation operation of the feed lever 176 because the bar 12 a is gripped and immovably fixed. And the cutting is started. The feed lever 176 can be detached from the pinion gear 168 as needed, and the operator can directly grip the cutting machine 18 and direct it to the bar 12a.

Then, the feed lever 176 is moved until the pin 164 erected on the cover 88 contacts the end of the elongated hole 52 provided in the guide member 42 on the receiving portion 20 side.
When the rod 12a is turned by the outer peripheral edge portion 196 of the disk-shaped rotary cutting tool 16 when the rotation is made against the urging force of the compression spring 50 provided in the bottomed hole 48, the rod 12a in FIG.
The cutting is completed by the relative movement to the position a '.

At this time, since the disk-shaped rotary cutting tool 16 advances in the direction of arrow F in FIG. 8 while rotating about its axis, the first outer peripheral edge portion 196a and the second outer peripheral edge portion 196b
Moves in the direction of arrow F while cutting the bar 12a alternately. In this case, the first outer peripheral edge portion 1
96a and the second outer peripheral edge portion 196b are formed by removing the first ridge portion 206 and the second ridge portion 210, respectively.
08 and the second C surface 212 are formed,
After cutting is performed at the outer peripheral cutting edge 202a of the first outer peripheral edge portion 196a shown by a solid line in the figure, the second
The outer peripheral cutting edge 202b of the outer peripheral cutting portion 196b and the outer peripheral cutting edge 202a of the first outer peripheral cutting portion 196a perform cutting into shapes indicated by oblique lines, respectively. Therefore, the width (length in the axial direction of the disk-shaped rotary cutting tool 16) W of the chips formed by the cutting is W _a when the cutting is performed by the outer cutting edge 202a, and the cutting is performed by the outer cutting edge 202b. In case _Wb ,
Each width W in the axial direction length W _B i.e. cutting groove 214 of the cylindrical locus formed by a plurality of peripheral cutting edge 202
_It is made smaller than _D. It should be noted that the width W _a and W _b of chips
Is changed by the moving speed of the disk-shaped rotary cutting tool 16 in the direction of arrow F in the figure, that is, the cutting speed.

It should be noted that the bar 12b, which is adjacent to the bar 12a,
Similarly to the bar 12a, the bar 12c relatively moves as shown by an arrow in FIG. 2, but as is clear from the figure, at the end of cutting, the adjacent bars 12b and 12c
Does not interfere with the housing 86 and the cover 88. That is, the width C of the housing 86 and the cover 88 in a direction perpendicular to the moving direction of the cutting machine 18 (that is, the longitudinal direction of the cutting machine 18) is a bar in the portion where the U-shaped notch 98 is provided. When the interval between the members 12 is the minimum size that can be cut, the width C and the width of the receiving portion 20 are set to be smaller than the distance between the bars 12b and 12c located on the left and right of the bar 12a to be cut. The maximum width D is determined.

At the time of the above cutting, the rod material 12a
The axis O of the disk-shaped rotary cutting tool 16 is located forward of the trajectory B of the center of rotation of the disk-shaped rotary cutting tool 16 in the rotation direction A. When 196 is brought into contact with the bar 12a, a force is generated in a direction to bring the disk-shaped rotary cutting tool 16 closer to the bar 12a side, and the cutting machine 18 is moved to the bar 1 at the time of cutting.
The force required for guiding in the direction approaching 2a is reduced, so that cutting can be performed more easily.

When the feed lever 176 is released after the cutting is completed as described above, the cutting machine 18 is moved in a direction away from the bar 12a in accordance with the restoring force of the compression spring 50, and the feed lever 176 is also returned to its original position. Is rotated to the position. Thereafter, the switch 82 is operated again to stop the rotation of the disk-shaped rotary cutting tool 16, and the turning operation lever 60 is turned counterclockwise in FIG. By removing the machine 14 from the bar 12a, a series of cutting operations is completed.

Here, in the present embodiment, the plurality of outer peripheral edge portions 196 of the disk-shaped rotary cutting tool 16 are
6 has a first outer peripheral edge 196a from which the first peripheral edge 206 has been removed and a second outer peripheral edge 196b from which the first ridge 206 has not been removed. That is, a plurality of peripheral cutting edge portion 196 is configured to include a short peripheral cutting edge 202a than the axial direction length W _B of the cylindrical locus formed by a plurality of peripheral cutting edge 202. Therefore, when cutting the bar 12a with the disk-shaped rotary cutting tool 16, the first outer peripheral edge portion 196a
The bar 12a is cut by the outer peripheral cutting edge 202a whose width in the axial direction is reduced by removing the first ridge 206, and the portion corresponding to the first ridge 206 in the cutting groove 214 is cut. It will be left uncut.

As described above, at least the first outer peripheral edge portion 19
When cutting the peripheral cutting edge 202a of 6a is performed, the width W _a of the chips generated as described above, a plurality of peripheral cutting edge 202 of the first outer peripheral edge portion 196a and the second outer peripheral edge portion 196b axial length W _B of the cylindrical locus formed, that is, the smaller than the width W _D of the cutting groove 214 formed in the bar 12a, the generated chips is inflated by the heat generated during cutting Also, the friction between the chips and the inner wall surface of the cutting groove 214 when the chip is accommodated in the notch 194 of the disk-shaped rotary cutting tool 16 acting as a tip pocket and moved in the cutting groove 214 is preferably suppressed. . Therefore, oxidation of the inner wall surface of the cutting groove 214, that is, the cut end surface due to friction between the chip and the inner wall surface of the cutting groove 214 is suppressed, and a chip having a width equal to the width of the cutting groove 214 is generated. The cutting resistance is reduced as compared with the cutting operation by the disk-shaped rotary cutting tool 16, and the cutting operation is performed more efficiently.

Further, according to the present embodiment, the second outer peripheral edge portion 1
96b is a disc-shaped rotary cutting tool 16
Since the second ridge 210 located on the opposite side of the axial direction of the second peripheral edge is removed, the second outer peripheral edge portion 196b also has the second ridge 210 removed, so that the width in the axial direction is cylindrical. its cleavage groove 214 is cut in small been peripheral cutting edge 202b than the width W _B of the axial direction of Jo trajectory second ridge 21
Since the portion corresponding to 0 is left uncut, the second ridge 210
There compared to if not removed, the width W _b of chips generated by the outer peripheral cutting edge 202 of the second peripheral cutting edge portion 196b is more reliably reduced.

Moreover, the outer peripheral cutting edge 202a of the first outer peripheral edge portion 196a and the outer peripheral cutting edge 202 of the second outer peripheral edge portion 196b
b is provided on the opposite side of the axial center direction, and the outer peripheral cutting edge 202b also produces an uncut portion on the opposite side of the outer peripheral cutting edge 202a in the axial direction.
Becomes that none of 02a and 202b exclusively removed by cutting the other uncut portions, the width W _a of the chips produced are also further reduced. Therefore, the friction between the generated chips and the inner wall surface of the cutting groove 214 is further suppressed, and the oxidation of the cutting end surface is further suppressed, and the increase in the cutting resistance is further suppressed, so that the cutting operation is more efficient. Can be done well.

Further, the first outer peripheral edge 196a and the second outer peripheral edge
Since it is arranged alternately in the circumferential direction with the portion 196b,
One of the first outer peripheral edge portion 196a and the second outer peripheral edge portion 196b
Groove 2 by the outer peripheral cutting edge 202a or 202b
The uncut portion formed in 14 is subsequently provided
The outer peripheral cutting edge 202b or 202a
The first outer peripheral edge portion 196a and the second outer peripheral edge portion 196a
One or both of the outer edge portions 196b are provided continuously.
The width W of the generated chips as compared to _a, W_b
Is more reliably reduced.

Further, as described above, the first outer peripheral edge portion 196
a and the second outer peripheral edge portion 196b are alternately arranged in the circumferential direction.
(Inner wall surface) has a good surface state having fine irregularities suitable for gas pressure welding and the like, and when the bar 12a and another bar are connected by, for example, gas pressure welding, a relatively high bonding strength is obtained. Obtainable.

The disk-shaped rotary cutting tool 16 has an outer peripheral edge 19 formed by forming a TiN film on the entire surface thereof.
The brazing material for fixing 6 to the base material is covered with the TiN film. Therefore, the brazing material is prevented from adhering to the inner wall surface of the cutting groove 214, that is, the cut end surface of the bar material 12a. Therefore, when the bar 12a is gas-pressure-contacted with another bar, the presence of a brazing material, that is, an impurity on the joint end surface of the bar 12a is suppressed, and higher reliability of the press-contact strength can be obtained.

Further, the bar cutting device 10 includes a bar holding machine 1.
4, a longitudinal cutting machine 18 having at one end a disk-shaped rotary cutting tool 16 which is driven to rotate about an axis parallel to the axis of the bar 12a, and the disk-shaped rotary cutting tool 16 And a tool guide device for linearly guiding the rod material 12a toward the rod material 12a, so that the cut end face of the rod material 12a is vertical and flat in the axial direction, and as described above,
width W _a of the chips to be generated when cutting a, W _b is small, the friction between the even cut edge if the chip has been inflated by the heat associated with the cutting is prevented As a result, the rod 12a can be cut while suitably suppressing the oxidation of the cut end surface and the increase in cutting resistance due to the friction, and furthermore, the decrease in cutting efficiency. Therefore, the cut end face is in a state where it is perpendicular and flat to the axial direction suitable for gas pressure welding and the like, and the oxide film is removed.

In addition, the above-described tool guide device includes the guide member 42, the guide walls 144, 146, and the back plate 148, 1
50, the disk-shaped rotary cutting tool 16 is
In order to cut the bar 12a linearly toward the bar 2a, a cutting machine 18, that is, a disk-shaped rotary cutting tool is moved toward the bar 12a gripped by the bar gripper 14. 16 is moved linearly,
After the cutting, the rod 12a is linearly moved in a direction away from the bar 12a. Therefore, the disk-shaped rotary cutting tool 16
It is no longer necessary to secure the rotation angle as in the case of performing the cutting by rotating about a predetermined rotation axis different from the rotation axis, and the intervals are relatively dense as shown in FIG. The disposed bar 12 can be easily cut.

Further, since the cutting is performed by linearly feeding the cutting machine 18 as described above, unlike the case where the disk-shaped rotary cutting tool 16 is rotated, the cutting between the bar holding machine 14 and the bar 12a is performed. Relative rotation hardly occurs, and it is not necessary to have the bar gripper 14. Therefore, after the bar 12a is gripped by the bar gripper 14, the operator can hold the cutting machine 1 with one hand.
8 can be moved toward the bar 12a, so that when cutting, the upper part of the bar 12a to be cut and removed is held with the other hand to prevent the bar 12a from dropping, thereby performing the operation more safely. It is possible.

In the above description of the cutting operation,
Although the bar 12a is constructed and erected, the bar cutting device 10 can also be used to cut the bar 12 that has not yet been constructed. The cutting operation may be performed, for example, as described above, or may be performed by fixing the bar cutting device 10 to a fixed base (not shown). That is, as shown in FIGS. 1 and 2, a pair of female screw holes 192 and 192 are provided in the receiving surface 54 b of the receiving portion 20.
If this receiving portion 20 is attached to a fixing stand (not shown) by a bolt and the bar material cutting device 10 is fixed such that the receiving portion 20 is located on the lower side and the motor 84 is located on the upper side, similar to the conventional desktop type cutting device, It is possible to use.

[0080]

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in still another embodiment.

For example, in the above-described embodiment, the disc-shaped rotary cutting tool 16 has the first ridge 206 removed.
The outer peripheral blade portion 196a and the second ridge 210 from which the second ridge portion 210 has been removed.
Although the outer peripheral edge portions 196b and the outer peripheral edge portions 196b are arranged alternately in the circumferential direction, the first outer peripheral edge portions 196a and the second outer peripheral edge portions 196b are not necessarily arranged alternately. For example, the effects of the present invention can be obtained even if a plurality of each of the first outer peripheral edge portions 196a and the second outer peripheral edge portion 196b are arranged to be continuous with each other. be able to.

[0083]

Further, in the embodiment, the disk-shaped rotary cutting tool 16 is replaced with the outer peripheral edge portion 19 having the C surface or the stepped portion formed by removing the first ridge portion 206 and the second ridge portion 210.
6 has been described, but the first ridge 20
The shape of the outer peripheral blade portion 196 after the removal such as 6 can be changed as appropriate. For example, a curved surface may be formed instead of the C surface, or the first ridge portion 206 and the second ridge portion 21 may be formed.
When 0 is largely removed except for the other ridge, the entire outer peripheral cutting edge 202 may be formed so as to be oblique with respect to the axial direction. That is, the first ridge 206
Is removed so that a portion corresponding to the first ridge 206 in the cutting groove 214 formed in the material to be cut such as the bar 12a is left uncut.
a and the second outer peripheral edge portion 196b for cutting the uncut portion without removing the first ridge portion 206, the effect of the first invention can be obtained.

[0085]

In the embodiment, the guide wall 14
The moving member composed of the 4,146 and the back plates 148,150 is closely arranged on the outer peripheral surface of the guide member 42 to form a tool guide device, and the disk-shaped rotary cutting tool 1
6 is linearly guided toward the bar 12a, so that the bar 12a is cut so as to form a flat and flat end face in the axial direction. By rotating the cutting machine 18 about an axis parallel to the axis of the tool 16, a similar cut end face can be obtained even when the disk-shaped rotary cutting tool 16 is directed toward the bar 12a. There is .

In the embodiment, the disk-shaped rotary cutting tool 16 is formed by fixing the outer peripheral blade portion 196 to the disk-shaped base material by brazing or the like. By processing the outer peripheral portion, the outer peripheral blade portion 19 is formed.
The present invention is similarly applied to the case where 6 is formed integrally with the base material.

[0088]

Although not specifically exemplified, the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a front view showing a bar cutting device to which a disk-shaped rotary cutting tool according to one embodiment of the present invention is applied.

FIG. 2 is a plan view of the bar cutting device of FIG. 1;

FIG. 3 is a bottom view of the bar cutting device of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 2;

6A and 6B are views for explaining the configuration of an outer peripheral blade portion of a disk-shaped rotary cutting tool used in the cutting apparatus of FIG. 1, wherein FIG. 6A is a plan view of the outer peripheral portion, and FIG. () Is a diagram showing a state viewed from the b direction, and (c) is a diagram showing a state viewed from the c direction in (a).

FIG. 7 is a view showing a chip storage bag used by being attached to the bar cutting device of FIG. 1;

FIG. 8 is a view for explaining a cutting state when a bar is cut by the bar cutting apparatus of FIG. 1;

[Explanation of symbols]

12: Bar material (material to be cut) 16: Disk-shaped rotary cutting tool 194: Notch (tip pocket) 196: Outer edge portion (196a: First outer edge portion, 196)
198: outer peripheral flank 202: outer peripheral cutting edge 204: side surface 206: first ridge

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-201121 (JP, A) JP-A-7-148613 (JP, A) Fully open 49-110890 (JP, U) Really open 1951 83085 (JP, U) Japanese Utility Model Hei 3-22823 (JP, U) Registered Utility Model 3007299 (JP, U) Hideharu Sakai "Tip Saw" (June 20, 1976, published by Kazuo Yoshida) (58) Survey Field (Int. Cl. ⁶ , DB name) B23D 45/00 B23D 61/04

Claims (4)

(57) [Claims] An end of a metal bar is joined by gas pressure welding.
Bar cutting equipment used for cutting to cut
A is, housing respectively bar gripper for gripping the metal rods, and a plurality of peripheral cutting edge portion having a peripheral cutting edge, respectively, said plurality of peripheral cutting edge portion of the peripheral cutting edge chips produced by the multiple forms a disk shape and a chip pocket, said plurality of peripheral cutting portions, the lateral escape of circumferentially located in both ends of the peripheral relief surface and the outer peripheral cutting edge of said peripheral cutting edge of Angle β
And a pair of side surfaces having a lateral clearance angle γ in the radial direction.
A plurality of first outer peripheral edge portions from which a first ridge portion between the outer peripheral flank surface and one of the pair of side surfaces has been removed, and the first ridge portion ; Between one side and the other
A disc-shaped rotary cutting tool is composed of a second edge portion and the second peripheral cutting edge portions of the plurality removed, the disc-shaped rotary cutting tool having at one end of the bar gripping
Cutting the metal bar gripped by the machine by cutting
The disc-shaped rotation about a rotation axis parallel to its axis.
Longitudinal equipped with a motor for rotationally driving the rolling cutting tool
And a cutting machine provided between the bar gripper and the cutting machine.
The disk-shaped rotary cutting tool provided at one end of the machine is
Tool guide for guiding the cutting machine so as to approach the metal bar
A gas pressure welding rod material cutting device comprising:
Place. 2. The gas pressure welding rod material cutting device according to claim 1, wherein the first outer peripheral edge portion and the second outer peripheral edge portion are alternately arranged in a circumferential direction . 3. The cutting device according to claim 1, wherein the tool guide device is provided at one end of the cutting machine.
The disk-shaped rotary cutting tool provided in the metal rod material
Straighten the cutting machine along its longitudinal direction so as to approach
The gas pressure welding according to claim 1 or 2, wherein the gas pressure welding is performed.
Bar cutting equipment. 4. A motor provided in the cutting machine,
Make the circle so that the peripheral speed of the outer peripheral cutting edge is about 10 (m / s).
A rotary drive for a plate-shaped rotary cutting tool.
3. A gas pressure welding rod material cutting device according to any one of 3 to 3.