JPH05309596A - Cutting method for cutting plotter - Google Patents

Abstract

PURPOSE:To reduce noises at the time of cutting by providing a cutting command for a cutting line for directing the edge of a cutter to the cutting direction of the cutting line between a first cutting action command and a second cutting action command when a changing angle is wider than a desired changing angle and by performing cutting by changing only cutter pressure to low pressure. CONSTITUTION:Firstly, a cutting line A is cut when a changing angle between the cutting direction of a cutting line A by means of a first cutting action command and the cutting direction of a cutting line B by means of a second action command is wider than a predetermined angle. Secondly, cutter pressure is changed to up to 50g while retaining the position of a cutter at the position of the terminal A2 of the cutting line A. Finally, cutting is started to the generally cutting direction of the cutting line A. The cutting line is cut so that the edge of the cutter may direct to the cutting direction of the cutting line B at the starting point of the cutting line B. The cutting line B is cut with cutter pressure equivalent to cutter pressure at the time of cutting the cutting line A from the starting point B1 of the cutting line B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method in a cutting device such as an automatic cutting plotter, and more particularly to a cutting method for beautifully cutting sharp corners.

[0002]

2. Description of the Related Art In a cutting device, as shown in FIG. 4, a cutting edge 1a of a cutter 1 is rotatably held in a holder 3 by being displaced by a predetermined distance m from a rotary shaft 2, and the holder 3 is controlled by a control unit (not shown). There is a cutting device that cuts the sheet-like object 4 by moving the sheet-like object 4 according to a plurality of cutting operation commands. Here, the cutter 1 is fixed to the tip of the rod-shaped cutter mounting portion 5 with a screw 6, and the rod-shaped cutter mounting portion 5 is attached to an opening of a charging recess 7 provided at the center of the lower end side of the holder 3 and a miniature bearing 8 is attached. It is inserted into the inner ring of.

Such a cutting device has a cutting edge 1a of the cutter 1.
By providing the offset distance m by shifting the rotation axis 2 from the rotation axis 2, the cutter 1 receives resistance from the sheet-like object 4 as the holder 3 moves, and torque acts on the blade edge 1a, so that the cutter 1 naturally gives a cutting operation command. It is designed to face the cutting direction of the cutting line.

Next, with reference to FIG. 5, the manner in which the cutting line A formed by the first cutting operation command and the cutting line B formed by the second cutting operation command are formed by the cutter 1 will be described. The cutter 1 cuts in the direction of arrow c1. At the point d, the cutter 1 is oriented in the direction of arrow c2. At this time, the rotary shaft 2 moves along the dotted line of the arrow c3. As a result, the cutter 1 faces from the triangle shown by the solid line to the triangle shown by the dotted line. Then, the cutting is performed in the direction of arrow c2. Here, the middle point of the bottom of the triangle is the cutter 1.
Of the blade edge 1a, and the diagonal portion thereof indicates the portion 1b.

When the cutter as shown in FIG. 4 is used for cutting as shown in FIG. 5, the blade of the cutter 1 does not always rotate at the point d as shown in FIG. That is, as shown in FIG. 6, the cutter 1 may be twisted so that only the portion 1b of the cutter 1 is located on the cutting line B, and the cutting edge 1a faces a different direction from the cutting direction of the cutting line B. As a result, as shown in FIG. 6, the cutting line A and the cutting line B are not cut at 90 ° at the point d, and the corners may be rounded or gouged. In particular, the larger the change angle between the cutting direction of the cutting line A and the cutting direction of the cutting line B, that is, the cutting line A and the cutting line B.
Such a state is more likely to occur as the angle formed by and becomes sharper. Further, even if the sheet-like object 4 becomes thick or hard, such a state is likely to occur.

As a means for solving the above-mentioned problems, after cutting the cutting line A, the cutter is raised and lowered to the sheet-shaped object or the blade tip adjusting member, and the blade tip of the cutter is pressed with a pressure at which cutting is impossible. Is adjusted so as to face the direction of the cutting line B, and then the cutting edge of the cutter is aligned with the starting point of the cutting line B, and then the cutting line B is cut.

[0007]

However, since the above-mentioned means needs to raise the cutter once, the cutting work time increases. Further, the rise of the cutter causes noise and is not preferable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cutting method capable of beautifully performing desired cutting without increasing cutting work time and noise.

[0009]

In order to achieve the above object, the cutting method of the present invention is such that the blade edge of the cutter is rotatably held in the holder by being offset by a predetermined offset distance m from the rotary shaft, and this holder is controlled. In a cutting device that cuts a sheet-like object by moving a plurality of cutting operation commands from a section, a cutting direction of a cutting line A by a first cutting operation command and a cutting line of a cutting line B by a second cutting operation command When the angle of change with the cutting direction is larger than the predetermined angle, the cutting line A is cut first, and then the cutter pressure is changed to 50 g or less while maintaining the position of the cutter 1 at the position of the end point A2 of the cutting line A. Then, the cutting is started in the substantially cutting direction of the cutting line A, and the cutting line X is cut so that the cutting edge 1a of the cutter 1 faces the cutting direction of the cutting line B at the starting point B1 of the cutting line B.
The cutting line B is cut with a cutter pressure equivalent to the cutting pressure when the cutting line A is cut from the starting point B1.

[0010]

According to the cutting method of the present invention, the cutting line A according to the first cutting operation command and the cutting line B according to the second cutting operation command.
For monitoring the angle of change of the cutting angle between the first cutting operation command and the second cutting command when the changing angle is larger than the desired changing angle. The cutting command of the cutting line X is interposed, and after cutting the first cutting operation command, the cutting line X cuts by changing only the cutter pressure to a low pressure without raising the cutter. As a result, the cutter blade is at the cutting depth of the cutting line A at the start of cutting the cutting line X, but the cutting depth gradually decreases due to the resistance of the sheet-shaped object as the cutting progresses. Since the blade edge is rotated with the blade edge of the cutter slightly cut into the sheet object, the sheet object is not gouged. Further, it is possible to prevent an increase in cutting work time and noise generation due to the rise of the cutter.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of an apparatus suitable for realizing a cutting method according to the present invention, and with reference to FIG. 1, an apparatus suitable for realizing a cutting method according to the present invention is a desired cutting apparatus. It includes an input device 9 for inputting a line, a CPU 10 connected to the input device 9 for controlling the entire device, and a ROM 11 connected to the CPU 10 for recording a predetermined program Z. The holder 3 is connected to the cutter holder moving unit 12, and C
It is moved by the program Z recorded in the ROM 11 by the PU 10.

The program Z monitors the changing angle between the cutting line A according to the first cutting operation command and the cutting line B according to the second cutting operation command, and when the changing angle is larger than the desired changing angle, the first Between the cutting operation command and the second cutting command,
It is a program for interposing a cutting command of a cutting line X including an arc for directing the blade edge of the cutter in the cutting direction of the cutting line B.

The contents will be described below with reference to FIG. 2 and 3 are explanatory views for explaining an embodiment of the cutting method according to the present invention. As the cutting member used in the apparatus suitable for realizing the cutting method according to the present invention, the one shown in FIG. 4 can be used.

According to the cutting method of this embodiment, the sheet-like object 4 including the material layer 13 to be cut and the mount 14 having the release layer formed thereon is cut by the cutter 1 as shown in FIG.
As shown in FIG.
When the angle of change with the cutting direction according to the cutting operation command is larger than a predetermined angle, first the cutter 1 is placed at the starting point A1 of the cutting line A.
The cutting edge 1a is combined and a sheet-shaped object capable of being completely cut is applied with a cutter pressure of, for example, 200 g to cut to the end point A2. Next, the cutter pressure is changed to a low pressure, for example, 20 g without raising the cutter 1, and the cutter 1 is cut to a point X1 on the extension line of the cutting line A separated from the point A2 by a distance twice the offset distance m. Next, the cutting edge 1a of the cutter 1 is rotated at the point X1 to cut to the point X2 on the extension line in the opposite direction of the cutting line B, which is separated from the point A2 by a distance twice the offset distance m. Then, the cutting edge 1a of the cutter 1 is rotated at the point X2, and cutting is performed immediately before the starting point B1 of the cutting line B. Here, the cutter pressure is returned to 200 g, and the cutting line B is cut to the end point B2. The cutting method according to the present invention is controlled by the program Z recorded in the ROM 11.

According to this embodiment, when cutting from the point A2 to the point X1, as shown in FIG. 3, the cutting depth of the cutting edge 1a of the cutter 1 with respect to the sheet object 4 has a locus represented by a dotted line. This is because the cutting depth gradually decreases due to the resistance of the sheet-shaped object as the cutting progresses. As a result, when moving a distance that is twice the offset distance m, the blade tip is in a state of being sunk by an extremely small distance from the surface of the sheet-shaped object. Therefore, at the position of the point X1, the blade edge easily rotates, and the sheet-shaped object is not gouged.

Further, as shown in FIG. 3, from point A2 to point X1.
Immediately after the cutting is started, the release layer 14 is completely cut by the minimum distance μ and is overcut. Therefore, when the cutting line B is cut, the contact point between the cutting line A and the cutting line B is surely cut. Further point A
In 2, the cutter blade does not have to be raised, so that the time required for raising the cutter is not required. Also, there is no noise caused by the rise of the cutter.

The cutter pressure for cutting the cutting line X varies depending on the thickness of the sheet-like object, but generally, when the sheet-like object is thick paper, it is preferably 50 g or less, When the sheet-shaped object is a synthetic resin sheet, it is preferably 20 g or less. Further, when cutting from the point X2 to immediately before the point B1, the cutter pressure may be gradually increased from the point X2 so that the cutter pressure becomes 200 g at the point B1. Further, in the present embodiment, the locus of the cutting line X is a triangle including the extension line of the cutting line A and the extension line in the opposite direction of the cutting line B, but the locus of the cutting line X is the cutting line A and the cutting line B. It may be curved in a region other than the narrow-angle region divided by. Further, in the embodiment, the points X1 and X2 are separated from the point A2 by a distance twice the offset distance, but the present invention is not limited to this.

[0018]

Since the present invention uses the cutting method as described above, even if the changing angle between the cutting direction according to the first cutting operation command and the cutting direction according to the second cutting operation command becomes large,
In addition, even if a thick sheet-shaped object or a hard sheet-shaped object is used, beautiful cutting can be performed. Further, since a sharp angle or the like can be cut without raising the cutter blade, desired cutting can be performed without increasing cutting work time and accompanying noise.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of an apparatus suitable for realizing a cutting method according to the present invention.

FIG. 2 is an explanatory diagram illustrating an example of a cutting method according to the present invention.

FIG. 3 is an explanatory diagram illustrating an example of the operation of the cutting method according to the present invention.

FIG. 4 is a schematic view showing a cutting member used in an apparatus suitable for realizing the cutting method according to the present invention.

FIG. 5 is a diagram showing a state at the time of cutting with a cutter.

FIG. 6 is a diagram for explaining a problem in the present invention.

[Explanation of symbols]

 1 Cutter 1a Blade Edge 2 Rotating Axis 3 Holder 4 Sheet Object 5 Bar Cutter Mounting Part 6 Screw 7 Loading Depth 8 Miniature Bearing 9 Input Device 10 CPU 11 ROM 12 Cutter Holder Moving Part 13 Cut Material Layer 14 Mount

Claims (1)

[Claims] 1. A sheet-shaped object is cut by displacing a cutting edge of a cutter from a rotating shaft by a predetermined offset distance m and rotatably holding the holder, and moving the holder according to a plurality of cutting operation commands from a control unit. In the cutting device to
When the change angle between the cutting direction of the cutting line A according to the first cutting operation command and the cutting direction of the cutting line B according to the second cutting operation command is larger than a predetermined angle, first, the cutting line A is cut, Next, at the position of the end point A2 of the cutting line A, the cutter 1
While maintaining the position of, change the cutter pressure to 50g or less,
Then, the cutting is started in the substantially cutting direction of the cutting line A, and the cutting line X is cut so that the blade edge 1a of the cutter 1 faces the cutting direction of the cutting line B at the starting point B1 of the cutting line B.
A method for cutting a cutting plotter, characterized in that the cutting line B is cut with a cutting pressure equivalent to the cutting pressure when the cutting line A is cut from 1.