JPH0524409Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cutting device equipped with a disc blade.

(Prior art) When bending a rod member such as a square pipe from an intermediate position to form, for example, a rectangular frame body, the first
As shown in Figure 5, a V-shaped cut 3 is made in a square pipe 30 (workpiece) using a cutting device equipped with a disc knife.
1 (V-cut) and then bending the cut inward from the notch 31 to form a corner part is generally adopted.

By the way, when making a V cut in the workpiece 30 in this way, conventionally a pair of cutter heads 101 and 102 equipped with a disc cutter 100 are used as shown in FIG.
, with the two disc cutters 100, 100 tilted at opposite angles to the workpiece 30, and in a direction perpendicular to the axial direction of each workpiece 30, 30 (arrow direction, cutter feeding direction). ), and by moving these two blade heads 101 and 102 to one side or the other in the blade feeding direction, each blade head 10
V-cuts are formed on the outer surfaces of the workpieces 30, 30, .

However, in this case, the number of blade heads equal to the number of inclined cutting surfaces is required. As shown by the chain line in Fig. 15, when making a concave cut (U-cut) at the bottom of the V-cut, a total of four cutter heads (two cutter heads for the U-cut) are required in addition to the two cutter heads for the V-cut. (requires a knife head)
Therefore, there are problems in that the manufacturing cost is high and the structure is complicated.

On the other hand, if you want to make such a V-cut with a single blade head, first set the blade at an angle of inclination that corresponds to one of the inclined cutting surfaces of the V-cut, and then feed it to make one of the inclined cuts. After forming the surface,
On the spot, the blade head was moved above the workpiece to avoid interference with the workpiece, and then the blade head was returned to its initial position, and the inclination angle of the blade head was adjusted again to correspond to the other sloped cutting surface. After setting the inclination angle, it is necessary to feed it to form the other inclined cut surface, which makes the work very complicated and the work efficiency extremely low.

This is due to the following reasons. In other words, when cutting a workpiece using a cutter head, a so-called undercut method is used in which the cutter cuts down from the top of the workpiece to the bottom, from the viewpoint of clamping the workpiece to the surface plate. Ru. Conventionally, when performing V-cutting, if the first cutting operation on one of the inclined cutting surfaces was performed using the undercut method, when this cutting was completed,
At that position, if the inclination angle of the cutter head is set to the inclination angle corresponding to the other beveled cut surface to be subsequently performed and the cutter head is returned to the initial position, the other bevel cut surface is formed. Since the cutting method is an up-cut method (that is, a cutting method in which the blade head cuts the workpiece from below to above), the workpiece tends to lift off the surface plate due to cutting resistance, and in some cases, the workpiece may Chatter disturbs the cut surface and reduces cutting accuracy, and in order to prevent such chatter, an extremely large clamping force is required compared to undercutting, where the workpiece is pressed against the surface plate due to cutting resistance. This also causes the device to become larger. For this reason, after cutting is completed on one inclined cutting surface, the blade head is returned to its original position and the cutting operation on the other inclined cutting surface is performed again in the same feeding direction.

In addition, in this way, when returning the blade head to the initial position after cutting one of the inclined cutting surfaces, lifting the blade head above the workpiece allows the blade to pass through the cutting groove formed by the first cutting operation. This is because when the head is turned back, abnormal noises are generated due to contact between the blade and the cutting surface.

Furthermore, the workpieces 30, 30 before and after the work...
In order to make it possible to attach and detach the blades to and from the bed 32, it is necessary to retract the respective blade heads 101 and 102 to the position shown by the solid line or the position shown by the chain line in FIG. 16 so as not to overlap the bed 32 in the vertical direction. However, in this case, bet 32
It is necessary to secure enough space to house the two blade heads 101 and 102 on both sides of the cutting tool, and there is also the problem that the cutting device itself becomes larger accordingly.

Further, in the conventional cutting device, as shown in FIG. 17, the blade head 102 is swingably attached to the support frame 103 via the bracket 105, and the inclination angle θ of the disc blade 100 of the blade head 102 is adjusted. When making adjustments, use the knife head 10.
2 is swung in the directions of arrows a and b about the support shaft 106. In this case, the position of the cutting reference point m located at the lowest end of the disc knife 100 will change in the vertical and horizontal directions (workpiece feeding direction) as the angle is adjusted.

Therefore, in order to accurately position the cutting reference point m of the disc knife 100 at a predetermined position, it is necessary to adjust the inclination angle of the disc knife 100 and at the same time adjust the blade head 102.
It is necessary to move it in the left-right direction (in the direction of arrow c-d) and in the up-down direction (in the direction of arrow e-f), making the work complicated and likely to be inaccurate. For this reason, for example, when making V-cuts with different cutting angles at a predetermined pitch in the longitudinal direction of one workpiece, the cutting reference point m changes in the feed direction of the workpiece each time the cutting angle is changed. It is difficult to uniformly set the feed pitch of the workpiece due to the fact that the feed pitch of the workpiece changes, and it is difficult to automate the work. If settings are to be made accurately, for example, it is necessary to use a computer to control the angle of the cutter head 102, to control the sliding movement in the left and right directions, to control the vertical movement, and to control the feed rate of the workpiece, which is one of the causes of increased costs. becomes.

(Purpose of the invention) The present invention is an attempt to solve the problems pointed out in the prior art section above, and is aimed at reducing the size and weight of the device, reducing costs, and improving workability in a cutting device equipped with a disc knife. The purpose of this is to improve the performance.

(Means for Achieving the Object) As a means for achieving the above object, the present invention connects a swinging frame to a fixed frame fixedly arranged by a fulcrum shaft, and a fulcrum passing through the central axis of the fulcrum shaft. While being able to swing around the axis, a cutter head equipped with a disc cutter is mounted on the swing frame.
The disk cutter is rotatably movable around a pivot axis perpendicular to the fulcrum axis, and is mounted so as to be movable in a direction parallel to the fulcrum axis, and is located closest to the workpiece. The blade reference point, the fulcrum axis, and the pivot axis are made to coincide at one point.

(Function) In the present invention, by the above-mentioned means, the fulcrum axis center line passing through the center of the fulcrum shaft that swingably supports the swinging frame, the rotation axis of the cutter head, and the cutter reference point of the disc cutter are connected. Since they match at one point, even if the inclination angle of the disk cutter relative to the workpiece is changed by rotating the cutter head and swinging the swinging frame, the cutter reference point of the disk cutter will always remain the same. It will be held in a fixed position.

In addition to being able to change the inclination angle of the cutter by swinging the swing frame and changing the inclination angle of the cutter head itself, the inclination angle of the cutter can also be changed by rotating the cutter head. Therefore, by using both in combination, it is possible to narrow the swinging range of the swinging frame, for example, compared to when adjusting the inclination angle of the blade only by swinging the swinging frame. becomes.

Furthermore, since the cutter head is rotatable, for example, when making a V-cut on a workpiece, the cutter head can be turned 180 degrees at the end of feeding in one direction and then returned to its original position. By making the cut back up to this point, it is possible to obtain a desired V-cut by cutting using the same cutting method, for example, an undercut method, on both the forward and return trips.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to FIG. 1 and FIG. 14.

1 and 2 show a cutting device Z according to an embodiment of the present invention. This cutting device Z makes V-cuts or U-cuts on the side surfaces of a plurality of workpieces 30, 30... (square pipes in this embodiment) fixed in rows on a sliding head 7 that slides along a base 6. It has a fixed frame 3 that is integrally formed in a substantially gate shape. This fixed frame 3 has four lower corners each with a lifting device 2
It is supported on the base 1 side via. Therefore, by raising and lowering this fixed frame 3 in the vertical direction (in the direction of arrow A-B) by each lifting device 2, 2..., the fixed frame 3 and the sliding bed 7 (that is, the sliding bed Workpiece 3 mounted on 7
0) will be displaced in the vertical direction (the amount of elevation of the fixed frame 3 will be reflected as the cutting depth of the disc knife 19 into the workpiece 30, as will be described later).

The fixed frame 3 is connected to the sliding bed 7.
are arranged across the width of the panel.

Further, inside the fixed frame 3, a swing frame 4, which will be described later, is attached. This swing frame 4 has an outer circumferential surface 41 at its expanded end 41a.
A pair of left and right side plates 41 approximately fan-shaped with b as an arcuate surface,
41, and a connecting plate 4 that connects the pair of side plates 41, 41 in a facing state with an appropriate interval (that is, a dimension slightly smaller than the inner dimension of the fixed frame 3).
2 are formed into a pair in a substantially gate shape. This swinging frame 4 has side plates 41 and 4 facing each other at a distance from each other.
1 are rotatably fitted to a pair of left and right fulcrum shafts 5, 5 which are coaxially attached via bearings 8 to the left and right lower ends 3a, 3a of the fixed frame 3 which are spaced apart from each other, respectively. By aligning them, a direction along the sliding direction of the swing bed 7 (arrow C-D
are connected and supported so as to be able to swing in the direction). below,
An axis passing through the center of this pair of left and right fulcrum shafts 5, 5
For convenience of explanation, Lo is referred to as the fulcrum axis center line.

Further, in this case, the fulcrum axis center line Lo is made to coincide with the center of curvature of the circular arc surface that constitutes the outer peripheral surface 41b of the side plate 41 of the swing frame 4.
Therefore, when the swing frame 4 swings around the fulcrum axis Lo, its outer circumferential surface 41b follows the same arcuate trajectory as shown by chain lines (41b' and 41b'') in FIG. will be drawn.

Further, in this embodiment, in order to mechanically swing the swing frame 4, a swing frame tilting mechanism 12, which will be described later, is provided on the outer peripheral side of the swing frame 4. That is, in this embodiment, circular arc teeth 55 are formed on the outer circumferential surface 41b of each side plate 41, 41 of the swing frame 4, and a pionion gear 56 attached to the fixed frame 3 side is meshed with the circular arc teeth 55. Furthermore, the large sprocket 5 is provided coaxially with this pinion gear 56.
7 is operatively connected to a small sprocket 58 on the motor 59 side via a chain 60, thereby forming a swing frame tilting mechanism 12. Therefore, the swing frame 4
is swung in the direction of arrow C-D about the fulcrum axis center line Lo by the rotational control of the motor 59. The swinging position of the swinging frame 4 can be easily and accurately set to any desired position by controlling starting and stopping of the motor 59 using a computer. Also, in this case,
As a method for fixing the swinging frame 4 at a predetermined swinging position, there are methods such as providing a brake device on the motor 59, or providing a mechanical stopper mechanism between the fixed frame 3 and the swinging frame 4. Conceivable. Furthermore, this swing frame tilting mechanism 1
2 is not limited to the configuration of this embodiment, and in addition to this, for example, a chain is attached to the outer circumferential surface 41b of the side plate 41 of the swing frame 4 along the arc direction of the outer circumferential surface 41b, and this chain is attached as described above. Instead of the pinion gear 56 in the embodiment, it may be made to mesh with an attached sprocket.

Further, inside the swing frame 4, there is provided a head moving mechanism 10 (described later) for moving a cutter head 9 (described later) in a direction parallel to the fulcrum axis Lo, and a head moving mechanism 10 (described later) for moving the cutter head 9 to the fulcrum axis (Lo). A head rotation support mechanism 11, which will be described later, is provided to support the head rotatably around a rotation axis lo perpendicular to line Lo.

As shown in FIGS. 1 to 3, the head moving mechanism 10 includes a pair of left and right side plates 41, 41 of the swing frame 4, which are spaced apart from each other and parallel to the fulcrum axis Lo. guide bar 4
Sliders 47 and 4 are swingably attached to 3 and 43, respectively.
At the same time, a flexible substrate 46 of an appropriate size to which a cutter head 9 to be described later is attached is fixed to the sliders 47, 47, and the movable substrate 46
is slidable along the guide bars 43, 43, and a fixed bracket 49 provided on the movable base plate 46 is connected to a movable plate 48 of a slide cylinder 51 with a movable plate fixed to the swing frame 4 side. Fixed configuration. Therefore, by operating the slide cylinder 51 and sliding the movable plate 48 in a direction parallel to the fulcrum axis Lo, the cutter head 9 attached to the movable base plate 46 is integrated with the movable base plate 46. The blade is moved in parallel in the direction of arrow E-F (feeding of the cutter head).

The amount of movement of the movable base plate 46 is such that the cutter head 9 can be retracted from above the sliding bed 7 to both sides in the width direction thereof, specifically, the width dimension of the sliding bed 7. The length is set to be slightly longer than the width of the blade head 9 plus twice the length.

As shown in FIGS. 1 and 3, the cutter head 9 is constructed by suspending and supporting a cutter drive motor 29 with a disc cutter 19 attached to its output shaft (not shown) by an arm 20. . This arm 20
These include a substantially L-shaped support arm 21 that is rotatably suspended from the center of the movable base plate 46 via a head rotation support mechanism 11 composed of a rack and pinion rotating cylinder 52;
The slide arm 22 is composed of a fixed arm member 23 fixed to the side and a movable arm member 24 fitted and fixed to the fixed arm member 23 so as to be slidable relative thereto, and to which the cutter drive motor 29 is attached. ing. In this embodiment, by applying the present invention, the pivot axis of the arm 20 is
The relative mounting position of the rotary cylinder 52 with respect to the movable base plate 46 of the head moving mechanism 10 is set so that lo is perpendicular to the fulcrum axis line Lo.
Therefore, in the case of this embodiment, regardless of the swinging position of the swinging frame 4, the swing axis lo of the arm 20 (that is, the swing axis of the cutter head 9) is aligned with the fulcrum axis Lo. They will be orthogonal.

Furthermore, in the cutting device Z of this embodiment,
The mounting position of the blade drive motor 29 with respect to the arm 20 is set as follows. That is, in this embodiment, as shown in FIGS. 1 and 3, the position closest to the workpiece 30 when the blade drive motor 29 is installed in the corner portion of the blade surface on the outer surface 19a side of the disc blade 19; That is, in this embodiment, the lowest position M is used as the reference point M of the gamecock. A straight line l ₂ (hereinafter referred to as the cutter reference line for convenience of explanation) that passes through this cutter reference point M and extends in the diametrical direction of the disc cutter 19 is the pivot axis.
lo, a predetermined angle (in this embodiment,
30°) (see Figure 3),
Alternatively, in the sliding direction of the swing frame 4, the relative mounting positions of the blade drive motor 29 and the arm 20 are determined so as to be orthogonal to the fulcrum axis Lo (see Fig. 1). . Therefore, the fulcrum axis center line Lo, the pivot axis lo, and the blade reference line _l2 coincide at one point.

Further, in this embodiment, as shown in FIG. 3, the sliding direction of the slide arm 22 (direction of arrow J-K) is set to be parallel to the direction of the cutter reference line _l2 . Therefore, the adjustment bolt 25 provided between the fixed arm member 23 and the movable arm member 24 of this slide arm 22
By spirally rotating the disc knife 19, the disc knife 19 is moved in parallel with the knife drive motor 29 along the knife reference line _l2 . Therefore, by adjusting the adjustment bolt 25, it is possible to match the cutter reference point M of the disc cutter 19 with the fulcrum axis Lo and the rotation axis lo at one point (as shown in the third figure). Therefore, this blade reference point M is the fulcrum axis center line Lo.
When the head rotation support mechanism 11 is operated and the cutter head 9 is rotated around the rotation axis lo (hereinafter referred to as a cutting possible state), the blade head 9 is rotated around the rotation axis lo. This knife reference point M is always held at one point on the fulcrum axis line Lo, and does not move vertically or horizontally (in the sliding direction of the sliding bed 7). Therefore, for example, when the cutter head 9 is turned 180 degrees from the position shown by the solid line in FIG. It will have an inclination angle of 30° in the opposite direction to lo before turning. That is, according to this cutter head 9, it can be rotated 180 degrees about its rotation axis lo, and the state before the rotation (the position shown by the solid line in FIG. 3) and the state after the rotation (the position shown by the chain line in FIG. 3) can be changed. By performing each cutting process, the workpiece 30 is cut at a predetermined angle (for example, when the vertical line _l1 coincides with the rotation axis lo as shown in FIG. 3, the disc cutter 1
It is possible to make a V-cut with a cutting angle (twice the angle of inclination of 9).

The cutting device Z of this embodiment performs the V-cut function obtained by rotating the single blade head 9 as described above by 180 degrees around its rotation axis lo, and the V-cut function obtained by rotating the single blade head 9 as described above by 180 degrees around the pivot axis lo. By combining this with the swinging movement of the movable frame 4 (that is, the swinging movement around the fulcrum axis Lo of the cutter head 9), it is possible to make a V-cut or a U-cut with an arbitrary cutting angle as described later. This simplifies workpiece feed control when a plurality of cuts with different cutting angles are formed in the longitudinal direction of the workpiece.

The V-cut and U-cut methods using this cutting device Z will be explained with reference to the schematic diagrams shown in FIGS. 4 to 7.

(1) When making a U cut on the workpiece 30 In this case, as shown in FIG. ₂ to plumb line l ₁
The inclination angle P of the rotation axis lo with respect to the vertical line _l1 is set to P=30°, and in this state, the knife head 9 is moved horizontally by the head moving mechanism 10 to perform the first cutting. Perform processing. Next, at the completion position of the first cutting process, the swing frame tilting mechanism 12 swings the swing frame 4 in the opposite direction by 60 degrees, and the head swing support mechanism 11 swings the blade head 9 by 180 degrees. Then, the blade head 9 is positioned as shown in FIG. 4B, and in this state, the blade head 9 is moved in the opposite direction to the first cutting process to perform a second cutting process.

By reciprocating the blade head 9 once in this manner, a U-shaped (more precisely, shape) cut 31 is formed in the workpiece 30, as shown in FIG. (Realization of U-cut). In this case, the first
When the cutting process is completed, turn the blade head 9 to 180°.
By performing the previous cutting process, the same cutting method (usually an undercut method is adopted) can be used for both the first cutting process and the second cutting process.
For this reason, for example, when performing reciprocating cutting using a single blade head 9, the cutting method is an undercut method for forward and return passes, such as a method in which the inclination angle is changed without rotating the blade head 9. Since the method has been changed to the upper cut method, problems such as deterioration of cutting accuracy due to chatter of the workpiece 30 do not occur.

(2) When making a V-cut with a cutting angle of 30° in the workpiece 30. In this case, as shown in Fig. 5A, the swing frame tilting mechanism 12 is activated so that the cutter reference line _l2 of the disc cutter 19 is vertical. The position of the blade head 9 is set so that it has an inclination of angle Q=15° with respect to the line _l1 , and the first cutting process is performed in this state.

Next, the swing frame tilting mechanism 12 is swinged in the opposite direction by an angle of 30°, and the cutter head 9
is rotated by 180° around the rotation axis lo, and the disk cutter 19 is tilted at an angle Q of 15° in the opposite direction to that during the first cutting process, as shown in FIG. 5b. In this state, if the blade head 9 is moved in the opposite direction to the first cutting process and the second cutting process is performed, the fifth
A V-shaped cut 31 having a cutting angle R=30° as shown in FIG. 3C is formed (realization of a V-cut).

Similarly, by appropriately performing the swinging operation of the swinging frame 4 and the turning operation of the cutter head 9, a V cut with a cutting angle R=60° as shown in FIG. 6C or a V cut as shown in FIG. Cutting angle R=
It is possible to turn V-cuts with arbitrary cutting angles, such as 90° V-cuts.

As described above, according to the cutting device Z of this embodiment, the swinging operation of the swinging frame 4 and the cutting tool head 9 can be easily controlled.
V with any cutting angle R by only turning operation.
It is possible to easily and accurately form a cut. Therefore, when changing the inclination angle of the disc knife 100, for example, as in the above-mentioned conventional example, the position of the knife reference point m of the disc knife 100 must be adjusted by simultaneously moving the knife head 102 vertically and horizontally. This has the advantage that the work is easier and more accurate than in the case where the work is not done, and the workability is improved accordingly.

Furthermore, even if the inclination angle of the disc cutter 19 is changed, the cutting reference point M always coincides with one point on the fulcrum axis. When forming a plurality of different V-cuts, the feed amount of the workpiece 30 is always kept constant regardless of the adjustment of the inclination angle of the disc knife 19, so the pitch of each V-cut can be easily managed. Automation of workpiece feeding can be realized easily and with inexpensive control means.

Furthermore, since V-cutting is possible with a single cutter head 9, the manufacturing cost is lower than that of the above-mentioned conventional example having a plurality of cutter heads 102, 102, and the device is compact. There is also the advantage that weight reduction and structural simplification are promoted.

In this embodiment, the disc knife 19 has a right-angled blade shape as shown in FIG. 8, but when making a V cut using the disc knife 19 with such a right-angled blade The entering angle is 90°.
In the following areas, as shown in FIG. 9, when the disk cutter 19 is rotated 180 degrees around the cutter reference point M, a non-overlapping portion of the blade is formed outside the cutter reference line _l2 . As shown in FIG. 10, the shape of the apex portion of the notch 31 has an irregular shape with a portion protruding slightly to the side. If such a distorted cut is not suitable, a substantially cup-shaped cut 31 as shown in FIG. 11 can be formed by, for example, performing a U-cut after the V-cut. That is, by changing the inclination angle of the disc knife 19 and making the knife head 9 reciprocate twice, it is possible to make a substantially cup-shaped cut. If you try, 2 for V cut
In addition to the two knife heads, it is necessary to equip a total of four knife heads, including two knife heads for U-cuts).

Further, when a V-cut with a perfect shape as shown in FIG. 14 is required, the blade shape of the disc knife 19 may be formed into an acute-angled molded blade as shown in FIG. 12. In this way, even when making a V-cut, as shown in Fig. 13, the non-overlapping part of the blade does not protrude outside the cutter reference line _l2 , and it is possible to make a perfect V-cut as shown in Fig. 14. Become.

Incidentally, the depth of cut by the disc knife 19 can be easily adjusted by changing the relative position in the vertical direction between the knife head 9 and the base 6 (i.e., the workpiece 30) using the lifting devices 2, 2, . . . be. In this case, for example, if the cutter reference point M of the disk cutter 19 is set below the bottom surface of the workpiece 30 on the sliding bed 7, the workpiece 30 is moved to the disk cutter 19.
can be cut diagonally or orthogonally. That is, this cutting device Z can cut the workpiece 30
It is possible not only to make incisions but also to cut them, and the inclination of the cutting surface can also be changed and set as desired.

(Effect of the invention) The cutting device of the invention connects a swinging frame to a fixed frame that is fixedly arranged by a fulcrum shaft so that it can swing around the fulcrum axis center line that passes through the central axis of the fulcrum shaft. On the other hand, a cutter head equipped with a disc cutter is attached to the swing frame so as to be able to pivot freely around a pivot axis perpendicular to the fulcrum axis and to be movable in a direction parallel to the fulcrum axis. ,
The disc cutter is characterized in that it is constructed so that the cutter reference point located closest to the workpiece, the fulcrum axis, and the rotation axis can be aligned at one point.

Therefore, according to the cutting device of the present invention, the center of the fulcrum shaft passing through the center of the fulcrum shaft that swingably supports the swinging frame, the rotation axis of the cutter head, and the cutter reference point of the disc cutter. One point coincides, and even if the inclination angle of the disk cutter relative to the workpiece is changed by rotating the cutter head and swinging the swinging frame, the cutter reference point of the disk cutter will always remain the same. For example, the prior art example (first example)
6 and 17), where the cutting reference point of the disc knife must be aligned at the same time when adjusting the inclination angle of the disc knife. Work is easy and accurate,
The effect is that the workability is improved.

In addition, regardless of whether the inclination angle of the disc knife is changed or adjusted, the cutting reference point of the disc knife always coincides with one point on the fulcrum axis. When forming multiple V-cuts with different cutting angles, it is sufficient to move the workpiece by the same amount of feed regardless of the adjustment of the inclination angle of the disk cutter. Compared to the case where the cutting reference point moves in the workpiece feed direction as the inclination angle is adjusted, pitch management of the V-cut is easier, and as a result, a simple control means can be used to control the workpiece feed. This also has the effect of automating the process and improving its workability.

Furthermore, the inclination angle of the blade can be changed or adjusted as desired by rotating the blade head and swinging the swinging frame, making it possible to cut at multiple angles using a single blade head. If possible, for example, when making a V cut on a workpiece, after forming an inclined cutting surface on one side on the forward pass, the cutter head is rotated 180° at the end of the forward pass and the swing frame is adjusted. By adjusting the inclination angle of the cutter and returning the cutter head as it is, it is possible to form an inclined cutting surface on the other side on this return trip, and as in the conventional example described above, a V cut is performed using two cutting heads. Compared to such a cutting device, the number of cutting heads can be reduced, which has the effect of reducing the cost, simplifying the structure, and reducing the size and weight of the cutting device.

In addition, when reciprocating the cutter head in this way to perform the required cutting work on both the outward and return passes, by reversing the cutter head at the end of the return pass as described above, the same cutting method can be used for both the outward and return passes. For example, since cutting can be performed using the undercut method, there is no need to increase the size of the clamp device or deteriorate cutting accuracy, which would occur if the cutting method is different for the forward and return passes, and it is possible to perform reciprocating cutting with good cutting precision. will be realized.

Furthermore, since the cutter head equipped with the cutter is attached to the swinging frame so that it can be rotated,
For example, when making a V-cut on a workpiece, changing and adjusting the inclination angle of the cutter is performed both by adjusting the swinging position of the swinging frame and by turning the cutter head. The amount of operation of the oscillating frame is reduced compared to when adjustment is performed only by adjusting the oscillating frame.
As a result, it is possible to improve work efficiency by shortening the time required for changing and adjusting the blade inclination angle.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view of a cutting device according to an embodiment of the present invention, Fig. 2 is a partially sectional sectional view taken in the direction of the arrow - - of Fig. 1, and Fig. 3 is an enlarged view of the main part of Fig. 1 - figure,
Figures 4 to 7 are diagrams showing how the cutting device shown in Figure 1 changes in usage, Figure 8 is an enlarged view of the cutting edge of the disk cutter shown in Figure 3, and Figure 9 is shown in Figure 8. Fig. 10 is a diagram of the intersection state of the disc blade; Fig. 10 is a diagram of the shape of the notch when cutting is performed in the state shown in Fig. 8;
Figure 11 is a modified view of the notch shape in Figure 10.
FIG. 2 is an enlarged view of the cutting edge of a disc knife used in a cutting device according to another embodiment of the present invention, and FIG.
Fig. 14 shows the cutting shape when cutting is performed in the state shown in Fig. 13, and Fig. 15 shows the general cutting state of the cutting device. A perspective view, FIG. 16 is a plan view of the main part of a conventional cutting device, and FIG. 17 is an X in FIG. 16.
-X is an enlarged view of the main part. DESCRIPTION OF SYMBOLS 1... Base, 2... Lifting device, 3... Fixed frame, 4... Swinging frame, 5... Fulcrum shaft, 6...
...Base, 7...Sliding bed, 8...Bearing, 9...
Blade head, 10...Head movement mechanism, 11...
Head rotation support mechanism, 12... Rocking frame tilting mechanism, 19... Disc cutter, 20... Arm, 26
... Rotating axis, 29 ... Blade drive motor, 30 ...
Workpiece, 46...Movable base plate, 51...Slide cylinder, 52...Rotating cylinder, M...Cuttle reference point, lo...Rotation axis line, _l1 ...Plumb line, _l2 ...Cuttle reference line, Lo... ...Fulcrum axis center line.

Claims (1)

[Scope of utility model registration request] A swing frame 4 is connected to a fixed frame 3 which is fixedly arranged by a fulcrum shaft 5, and can swing around a fulcrum axis center line Lo passing through the central axis of the fulcrum shaft 5. , a cutter head 9 equipped with a disc cutter 19 is mounted so as to be pivotable about a pivot axis lo perpendicular to the fulcrum axis Lo and movable in a direction parallel to the fulcrum axis Lo; The above disk cutter 19 and workpiece 30
A cutting device characterized in that it is constructed so that a blade reference point M located closest to the blade, the fulcrum axis center line Lo, and the rotation axis lo can be aligned at one point.