JP2922221B2 - Sheet cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cutting apparatus for cutting a sheet material into an arbitrary shape, and is used for cutting a prepreg or various plastic sheets as an intermediate material for FRP molding. Available.

(Background technology)

2. Description of the Related Art Conventionally, various cutting devices have been employed for cutting a sheet. However, when the sheet is sandwiched in the thickness direction and sheared, deformation near the cut portion may be a problem. Further, in the case of using a laser beam or a water jet, burning or water wetting of the cut end face may cause a problem. For this reason, a method of cutting with a cutter using a general cutting blade is frequently used as a cutting device.

FIG. 5 shows a conventional cutter type cutting device. A holder that moves two-dimensionally along the surface direction of the flat table 91 on which the sheet-like material 90 is spread.
A cutting blade 93 is attached to the holder 92. A blade edge 94 is formed obliquely at the tip of the cutting blade 93, and the protruding end of the blade edge 94 is kept in contact with the table 91. In this state, the cutting edge 93 is moved by the holder 92 in the direction of the cutting edge 94 (here, rightward in the drawing), so that the cutting edge 93 is moved.
Cutting of the sheet material 90 by 94 is performed.

In such a cutting device, an arbitrary shape can be cut out by feeding the cutting blade 93 while adjusting the direction along a predetermined contour line. In recent years, an ultrasonic cutter which applies ultrasonic vibration from the holder 92 to the cutting blade 93 to facilitate the cutting of the sheet-like material 90 at the blade edge 94 has been adopted.

Further, as shown in FIG. 6, a mountain-shaped cutting blade 95 having a tip inclined in both directions is also used, and two cutting edges in opposite directions are used.
There is a merit that a bidirectional cutting operation can be performed by using the 94, and an accurate cutting can be performed even on a contour line having an acute angle.

[Problems to be solved by the invention]

In the cutter-type cutting apparatus described above, as shown in FIG. 7, a portion 96 of the cutting edge 93 of the cutting edge 93 corresponding to the sheet-like material 90 is worn.

In particular, in the case of prepreg, which is an intermediate material of FRP (fiber reinforced plastic), the hardness of the core material carbon fiber and glass fiber is high, and tool steel, super steel,
Wear cannot be avoided even if a material such as ceramics is used.

Further, in order to surely cut the free quadratic curve corresponding to an arbitrary contour shape, it is necessary to keep the protruding end of the blade edge 94 in contact with the surface of the table 91.
Is limited to a certain position.

Therefore, in the cutting blade 93 used in the above-described cutting device, when the portion 96 used for cutting is worn, the original cutting performance cannot be obtained without using the other portion of the blade edge 94, and the cutting edge 93 is not used. There is a problem that the utilization efficiency as 93 is low.

On the other hand, to recover the cutting performance as a cutting device,
93 replacements are required. However, replacement of the cutting blade 93 requires manual operation by stopping the cutting device.
If the replacement of the cutting device is frequent, there is an economic problem that the running cost is increased, and there is a problem that the operating efficiency of the cutting device is reduced.

Here, if the mountain-shaped cutting blade 95 is used, the wear is distributed to each of the contact portions 96 of the two blade edges 94, so that the replacement life can be extended. However, as shown in FIG. 8, when the mountain-shaped cutting blade 95 is attached at an angle, the cutting angle of each blade edge 94 with respect to the sheet-like material 90 becomes different, and the cutting result becomes uneven. There's a problem. Therefore, a mountain-shaped cutting blade
The 95 requires a precise adjustment of the mounting position, which can prolong the replacement life, but has the problem that the replacement of the cutting blade is rather complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet-like material cutting apparatus capable of increasing the use efficiency of a cutting blade, extending a replacement life, and easily performing a cutting blade replacement operation.

[Means for solving the problem]

The present invention provides a cutting blade having at least a part of a peripheral portion thereof as a blade edge abutting on a table surface, a holder to which the cutting blade is fixed, and the holder in an arbitrary direction with respect to the table surface. A sheet cutting device configured to cut a sheet placed on the surface of the table, the cutting blade being configured to relatively move the holder. The cutting edge is provided so as to be able to maintain a stationary state during cutting and is fixed to the holder, and the blade edge is formed in an arc shape, and both sides in a circumferential direction of a portion of the blade edge that comes into contact with the table surface. Abraded portions are formed by cutting the sheet-like object, and the cutting blade at a position away from the table surface is automatically rotated by a predetermined angle to one side in the circumferential direction with respect to the holder. A cutting position updating mechanism is provided, and the cutting position updating mechanism is configured to separate the two worn portions from the sheet according to the thickness of the sheet each time the cutting blade is updated. It is characterized by having been done.

Further, in the present invention, the cutting position updating mechanism includes a cutting blade base that rotates integrally with the cutting blade, and is arranged in an arc shape at intervals around a rotation center of the cutting blade base. A plurality of engaging portions are provided, and an engaging member is provided for temporarily engaging the engaging portion at a predetermined position from the tangential direction in the arc shape, and the engaging member and the cutting blade are provided. The cutting blade may be configured to automatically rotate by a predetermined angle by the concave and convex engagement with the engaging portion of the base.

Here, as the cutting edge having an arc-shaped cutting edge, in addition to the cutting edge having only an arc-shaped cutting edge, the cutting edge having an arc-shaped cutting edge formed over the entire circumference in a disk shape is also used. Can be adopted.

[Action]

In the present invention, by making the arc-shaped blade edge of the cutting blade contact the flat surface of the table or the like, the angle between the table or the like and the blade edge is always constant and always equal on both sides of the contact point. . Therefore, it is not necessary to adjust the posture at the time of mounting the cutting blade, and the operation for replacement is simplified. In addition, by performing bidirectional cutting with the blade edge in each direction, it is possible to extend the life of the cutting blade, and furthermore, if necessary, automatically rotate the cutting blade by a predetermined angle to change the blade edge. The sequential use of the parts makes it possible to increase the efficiency of use of the cutting edge, minimize the downtime of operation, and significantly extend the replacement life, which achieves the stated object.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a cutting device 1 according to the present embodiment cuts a sheet-like material 3 placed on a table 2 into an arbitrary shape with a cutter 4, and the cutter 4 is brought into contact with the surface of the table 2. It is configured to move relatively.

The surface of the table 2 is horizontally supported by a base 11 fixed to the floor, and can be moved in the X-axis direction by a guide rail 12, a ball screw shaft 13 and an X-axis motor 14 formed on the base 11. is there.

The portal frame 20 is arranged so as to straddle the table 2,
The first member 21 and the second member 22 are provided on the side surfaces of the
The holder mechanism 30 is supported via the. The first member 21 includes a guide rail 23, a ball screw shaft 24, and a Y-axis motor 25.
Can be moved in the Y-axis direction. The second member 22 is fitted in the dovetail groove in the first member 21 and is movable in the Z-axis direction (vertical direction) by the Z-axis motor 26. Holder mechanism 30
Is supported by being inserted through the second member 22 and is rotatable about a vertical axis by a C-axis motor 27.

In other words, each guide rail 12,23, each ball screw shaft 13,2
4, and the motors 14, 25, 27 for each axis form a moving mechanism according to the present invention.

An oscillating mechanism 31 is built in the upper cylindrical portion of the holder mechanism 30, and the oscillating mechanism 31 generates vibrations in the ultrasonic range and transmits the vibrations to the holder 32 at the lower end. The cutter 4 is attached to the tip of the holder 32.

As shown in FIGS. 2 and 3, the cutter 4 has a circular cutting edge 40, and the cutting edge 40 has an edge 41 around the entire circumference.
Are formed. The cutting blade 40 is rotatably attached to the holder 32 via a cutting blade base 42.

A plurality of positioning holes 43 are circularly arranged at predetermined intervals on the back surface of the cutting blade base 42, and one of the holes 43 is unevenly engaged with a spring-pressed locking pin 44 projecting from the holder 32. Is locked at a predetermined angle position. The pressing force of the locking pin 44 is such that the concave and convex engagement with the hole 43 is not released even when the sheet 3 is cut by the cutting blade 40.

A plurality of recesses 45 as gear-shaped engaging portions are formed on the peripheral surface of the cutting blade base 42, and each recess 45 has a position and a number corresponding to the positioning hole 43. Here, as shown in FIG. 1, an updating cylinder is provided beside the table 2.
A concave portion 46 of the cutting blade base 42 is engaged with a hook-like portion 47 as an engaging member at the tip thereof, and the cylinder 46 is expanded and contracted as appropriate, so that the cutting blade base 42 and the cutting blade
It is possible to rotate 40.

That is, in the present embodiment, the cutting blade base 42 provided with the positioning hole 43 and the concave portion 45, the locking pin 44, and the hook-shaped portion 47
The cutting position updating mechanism according to the present invention is formed by the cylinder 46 provided with.

The operation of the present embodiment configured as described above will be described.

As shown in FIG. 4, a carbon fiber prepreg sheet 3A with release paper 3B used for FRP molding, for example, is spread as a sheet material 3 on the surface of the table 2, and a motor for the Z-axis is used.
The cutting blade 40 is lowered by 26 and brought into contact with the table 2.
In this state, ultrasonic vibration is applied to the cutting blade 40 and the C-axis motor 27
By turning the cutting blade 40 in the predetermined cutting direction, the X-axis motor 14 and the Y-axis motor 25 move the cutting blade 40 relative to the table 2 in the cutting direction.
The prepreg sheet 3A and the release paper 3B are sequentially edged by the cutting blade 40.
The cutting blade 40 is cut and opened, and a cutting line 3C is formed in the movement trace of the cutting blade 40.

Along with the cutting, a worn portion 41A is formed on the edge 41 of the cutting blade 40. In such a case, the operation of updating the blade edge 41 by the rotation of the cutting blade 40 is performed. That is, after the cutting blade 40 is raised from the sheet-like material 3, the cutting blade 40 is moved onto the cylinder 46 at the end of the table 2, and the concave portion 45 of the cutting blade base 42 is engaged with the hook-like portion 47 at the tip. By expanding and contracting the cylinder 46 in this state, the cutting blade base 42 and the cutting blade 40 are rotated by a predetermined angle from the angular position 40A to the angular position 40B. By this rotation, the worn portion 41A is moved to the worn portion 41B, the lower blade edge 41 used for cutting is updated to an unused portion, and cutting can be continued. That is, the arrangement pitch of the concave portions 45 provided in the cutting blade base 42 and the stroke amount at the time of expansion and contraction of the cylinder 46 are determined by one update of the cutting blade 40 in consideration of the thickness of the sheet-like material 3. It is set so that both of the worn portions 41A can be reliably moved to the worn portion 41B.

According to this embodiment, the following effects can be obtained.

That is, the cutting edge 40 wears due to the cutting, and the cutting edge 40
In the case where the cutting performance as described above is deteriorated, different portions of the blade edge 41 can be sequentially used by rotating the cutting blade 40 to perform the updating operation.

For this reason, the cutting operation can be performed on the cutting edges 41 of a plurality of portions of one cutting edge 40, and the utilization efficiency of the cutting edges 40 and the cutting edges 41 can be improved, and the life can be extended according to the number of renewals. The replacement life as one cutting blade 40 can be drastically extended.

In particular, by using the rotary circular cutting blade 40 and making the entire periphery the cutting edge 41, the cutting portion 40 formed in a thin plate shape can select the most cut portions, and is used by repeated renewal. Efficiency can be maximized.

When the sheet 3 is cut, an unused portion that contacts the table 2 is formed between the pair of worn portions 41A of the cutting blade 40. For this reason, when the cutting blade 40 is renewed, the rotation angle of the cutting blade 43 is made smaller than that shown in FIG. , And the other worn portion 41A can be moved to a position in contact with the table 2, so that the unused portion can be used as a new blade edge after updating. However, when the thickness of the sheet-like material 3 increases,
Since each wear portion 41A becomes larger and the unused portion becomes smaller, it becomes impossible to newly cut the sheet-like material 3 at such unused portion. On the other hand, in this embodiment, both wear portions 41A are separated from the sheet material 3 each time the cutting blade 40 is renewed. Therefore, even when the thick sheet material 3 is cut, the wear portions 41A are removed from the wear portions 41A. The sheet-like material 3 can be cut at a new unworn portion at a position that is completely displaced, so that the cutting blade 40 can be reliably updated.

At this time, the angle at which the cutting blade 40 actually rotates depends on the cutting blade base.
The arrangement pitch of each recess 45 provided in 42 and the hook-shaped portion 47
Although determined by the stroke amount of the (cylinder 46), when the thickness of the sheet-like material 3 becomes thicker, a cutting blade base 42 having a concave portion 45 having an arrangement pitch corresponding to the thickness may be used, or a hook-like portion may be used. What is necessary is just to adjust the stroke amount of 47, and it can respond | correspond easily to the sheet-shaped material 3 from which thickness differs.

Further, in order to rotate the cutting blade 40, the concave portion 45 of the cutting blade base 42 and the hook-shaped portion 47 are engaged with the concave and convex, so that the amount of rotation can be accurately defined, and the amount of rotation is shifted. Can be prevented.

With such improved use efficiency of the cutting blade 40, the cost spent on the cutting blade 40 can be significantly reduced,
The operating efficiency of the cutting device 1 can be improved with the extension of the replacement life.

In particular, when performing the renewal operation of the blade edge 41, the cutting blade 40 is automatically rotated by the renewal cylinder 46 or the like, so that a manual operation is not required, and a quick and reliable operation can be performed. In addition, the operation interruption time of the cutting device 1 can be minimized.

On the other hand, in the present embodiment, since the cutting blade 40 is circular, the blade edge 41 formed in the periphery becomes an arc shape at each part, and as shown in FIG. The angles A1 and A2 are equal to each other and are always constant.

Therefore, even when the cutting blade 40 is attached or the blade edge 41 is updated, there is no need for precise posture adjustment or the like by hand at all.
Complete automation is possible, and the manual operation for replacing the entire cutting blade 40 can be greatly simplified.

In addition, since the cutting edge 41 in each direction is symmetrical with each other, bidirectional cutting can be performed by each cutting edge, cutting at an acute angle can be performed accurately, and wear is dispersed, thereby cutting the cutting edge.
40 life can be extended.

Further, in the case of the circular cutting blade 40, the blade edge 41 is formed in an arc shape, so that the number of contact portions with the sheet-like material 3 increases in cutting,
Since the wear at the portion can be reduced and the strength of the portion in contact with the table 2 increases, the occurrence of blade spillage and the like can be prevented, and this also contributes to effective use.

Since the cutting device 1 is provided with a moving mechanism, the cutting blade 40 fixed to the holder 32 is moved in an arbitrary direction with respect to the table 2 so that a free secondary shape corresponding to an arbitrary contour shape is obtained. The cutting of the curve can be easily performed, and the movement of the cutting blade 40 above the cylinder 46 can be easily performed.

The present invention is not limited to the above embodiment, but includes the following modifications.

That is, in the above-described embodiment, the circular cutting blade 40 is rotated by moving the hook-shaped portion 47 up and down by the updating cylinder 46. However, the cylinder 46 is omitted, and the hook-shaped portion 47 is provided on the side of the table 2. Alternatively, the cutting blade base 42 may be lowered from above the hook-shaped portion 47 by the raising / lowering operation of the holder 32 by the Z-axis motor 26 to rotate the cutting blade 40. In such a case, a cutting position updating mechanism including the Z-axis motor 26 and the holder 32 is formed.

On the other hand, the cutter 4 is not limited to the circular cutting blade 40, but may be any cutter having at least a circular edge.

In addition, various materials, such as the material of the cutting blade 40, the finish, the cutting shape and the thickness of the cutting edge, etc., can be used.
May be appropriately selected according to the cutting edge of the cutter 4.
The support structure such as 40 or the structure leading to the holder 32 for moving the cutter 4 in the cutting device 1 may be appropriately changed in implementation.

〔The invention's effect〕

As described above, according to the sheet-like object cutting device of the present invention, the use efficiency of the cutting edge can be increased by using a plurality of the cutting edges, the replacement life can be extended, and the cutting edge can be circular. With the arc shape, the inclination can be finely adjusted and the replacement of the cutting blade can be easily performed. Further, by providing the cutting position updating mechanism, the operation interruption time can be minimized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views and side views showing the main parts of the embodiment, respectively, and FIG. 4 is an operation of the embodiment. 5, FIG. 5 and FIG. 6 are side views showing different conventional examples, FIG. 7 is a sectional view showing details of the conventional example of FIG. 5, and FIG. 8 is a conventional view of FIG. FIG. 4 is a side view showing details of an example. 1 ... cutting device, 2 ... table, 3 ... sheet-like object,
4 ... cutter, 32 ... holder, 40, 70 ... cutting edge, 41, 71
...... Blade edge.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Susumu Koizumi 2068-3 Ooka, Numazu-shi, Shizuoka Toshiba Machine Co., Ltd. Numazu Office (56) References −181395 (JP, U) Actually open 63-186591 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B26D 1/04 B26D 1/14

Claims (2)

(57) [Claims] A cutting edge having at least a part of a peripheral edge thereof abutting against a table surface; a holder to which the cutting edge is fixed; and a holder in an arbitrary direction with respect to the table surface. A sheet cutting device configured to cut a sheet placed on the surface of the table, the cutting blade performing the relative movement of the holder. It is provided so as to be able to maintain a stationary state during cutting of the sheet-like material and is fixed to the holder, the blade edge is formed in an arc shape, and a circumferential direction of a portion of the blade edge that comes into contact with the table surface is used. On both sides, a worn portion is formed by cutting the sheet-like material, and the cutting blade located at a position away from the table surface is automatically rotated by a predetermined angle to one side in the circumferential direction with respect to the holder. A cutting position updating mechanism for moving, the cutting position updating mechanism is configured to separate the two worn portions from the sheet-like material according to the thickness of the sheet-like material every time the cutting blade is updated. A sheet cutting device characterized by being constituted. 2. The cutting position updating mechanism according to claim 1, wherein the cutting position updating mechanism includes a cutting blade base that rotates integrally with the cutting blade, and around a rotation center of the cutting blade base, A plurality of engaging portions arranged in an arc at intervals are provided, and an engaging member is provided which temporarily engages with the engaging portion at a predetermined position from a tangential direction in the arc, The sheet cutting device according to claim 1, wherein the cutting blade is automatically rotated by a predetermined angle by the concave / convex engagement between the engaging member and the engaging portion of the cutting blade base.