JP7506792B1 - Cutting device - Google Patents

Abstract

[Problem] To provide a cutting device that combines the advantages of a copy cutting device and a die cutting device. [Solution] The cutting device has a rotating shaft 1 arranged perpendicular to the processing surface, a rotating motor 2 that drives the rotating shaft, a pair of rollers 5 that are driven by the rotating shaft 1 to rotate, a support member 8 that moves linearly guided by the rollers 5, a linear drive motor 6 that moves the support member back and forth linearly, a copying unit 10 that is arranged on one end side of the support member and on a straight line 14 that passes through the center of the rotating shaft and copies a figure corresponding to the shape to be cut, a cutting torch 15 that is arranged on the other end side of the support member and on the straight line 14, and a control unit 20 that stores data on the angle θ and distance 1 from a copying center 11a to a target point 11b on the figure based on the straight line 14 detected by the copying unit, and controls the rotating motor 2 and the linear drive motor 6 based on the stored angle and distance data. [Selected Figure] Figure 1

Description

The present invention relates to a portable cutting device that cuts by tracing a shape or line that corresponds to the shape to be cut.

Cutting devices equipped with cutting torches such as gas cutting torches or plasma cutting torches are used to cut shapes into materials such as steel and stainless steel plates. One such cutting device is a copy cutting device that has a frame that runs on rails installed in a factory and optically detects and cuts the edges or lines of a drawing drawn to correspond to the shape to be cut. Generally, such copy cutting devices are large and are configured to transport the material to be cut to a cutting area set within the movable range of the frame and perform the cutting work.

On the other hand, there is a die cutting device that cuts the product by contacting a magnet or the like with a die made from a steel plate or the like in advance to correspond to the product to be cut. This die cutting device is heavy enough that it can be carried by an operator, and the operator can carry it to the desired work site and perform the cutting work there.

In the case of the above-mentioned tracing cutting device, since the object to be traced is the lines of a pattern or drawing, it is easy to respond to changes in the shape to be cut, but since the material to be cut needs to be transported, there is a problem that it is not maneuverable. On the other hand, in the case of the above-mentioned die cutting device, regardless of the location where the material to be cut is to be cut, the worker can transport the die cutting device and respond, so there is an advantage that it is maneuverable. However, there is a problem that every time the shape of the product to be cut changes, a die must be made to correspond to this shape, and the precision of the product depends on the precision of the die.

The object of the present invention is to provide a cutting device that combines the advantages of a profile cutting device and a die cutting device.

A representative cutting device according to the present invention for solving the above problems is a cutting device that cuts a material by tracing a pattern or line corresponding to the shape to be cut, and includes a rotating shaft arranged perpendicular to the processing surface, a rotating drive unit that drives the rotating shaft, a linear guide member that is arranged at a position away from the rotating shaft and rotates when driven by the rotating shaft, a rod-shaped support member that moves linearly while being guided by the linear guide member, a linear drive unit that moves the support member back and forth linearly, a tracing unit that is arranged on one end side of the support member on a line passing through the center of the rotating shaft and traces the pattern or line corresponding to the shape to be cut, a cutting unit that is arranged on the other end side of the support member on a line passing through the center of the rotating shaft, and a control unit that stores data on the angle and distance from the center of the tracing unit based on the line passing through the center of the rotating shaft detected by the tracing unit to a target point on the pattern or line corresponding to the shape to be cut, and controls the rotating drive unit and the linear drive unit based on the stored angle and distance data.

In the cutting device of the present invention, a tracing section and a cutting section are disposed at both ends of a rod-shaped support member, and the tracing section detects the angle and distance from the tracing center to the target point on the pattern or line, and the linear movement amount and the rotation angle amount of the support member are controlled, thereby realizing movement of the tracing section and the cutting section toward the target point. This eliminates the need to place rails in the perpendicular directions, allowing for miniaturization, and even if the shape to be cut changes, it can be easily accommodated by changing the pattern or line. This allows for a cutting device that combines the advantages of both a tracing cutting device and a portable cutting device.

FIG. 2 is a front view illustrating the configuration of the cutting device according to the present embodiment. FIG. 2 is a plan view illustrating the configuration of the cutting device according to the present embodiment. FIG. 2 is a right side view of FIG. 1 . FIG. 2 is a left side view of FIG. 1 . FIG. 11A and 11B are diagrams illustrating an example of tracing by a tracing member.

The cutting device according to the present invention will be described below. The cutting device according to the present invention is configured to be able to cut by tracing a paper pattern or a line drawing (hereinafter, the paper pattern and the line drawing will be collectively referred to as "drawing") formed to correspond to the shape to be cut, and is also capable of being transported to the desired position regardless of the location where the work is to be performed.

In particular, the support member is configured to be able to move back and forth in a straight line and to be able to rotate around a pivot axis, and the tracing section and the cutting section are disposed on both ends of the support member on a straight line that passes through the center of the pivot axis (hereafter referred to as the "pivot center") and is parallel to the support member. Therefore, when the drawing is traced using the tracing section, the cutting section can draw a symmetrical figure with the pivot center as the center.

Then, the cutting unit can be operated while tracing the drawing with the tracing unit to cut the material to be cut. Also, by storing the data on the rotation angle obtained by tracing the drawing with the tracing unit and the data on the linear movement amount of the support member, it is possible to repeatedly cut the same shape without tracing the drawing thereafter.

As described above, the cutting device according to the present invention is configured so that the drawing traced by the tracing part can be analyzed using a circular coordinate system. Therefore, there is no need to place rails in two perpendicular directions as in cutting devices configured using a Cartesian coordinate system, and it is possible to configure the cutting device as a portable, compact device.

The following describes an embodiment of the cutting device A according to the present invention using the drawings.

Cutting device A is composed of a main body B and a rotating body C that is rotatably arranged on the top of main body B. Main body B is provided with a rotating shaft 1 that is arranged vertically to the surface of the material to be cut (not shown), such as a steel plate, which is arranged substantially horizontally, a rotating motor 2 that constitutes a rotating drive unit that drives the rotating shaft 1, and a gear train 3 that connects the rotating shaft 1 and the rotating motor 2.

As described below, the cutting device A of this embodiment is configured to trace the drawing and perform cutting by rotating the rod-shaped support member 8 by the rotating shaft 1. For this reason, the main body B is formed with a cylindrical outer shape. By having such a shape, it is possible to increase the range of angles over which the support member 8 can be rotated.

A rotating body C is disposed on top of the main body B, and the rotating body C is configured to be rotatable by being driven by a rotating shaft 1. A pair of rollers 5 that act as linear guide members are disposed protruding from the side of the rotating body C, and a linear drive motor 6 that constitutes a linear drive unit is disposed inside.

A support member 8 is supported by a pair of rollers 5 so that it can move linearly back and forth. The drive system for the support member 8 using the linear drive motor 6 can be a rack and pinion system, a friction system, or the like. In this embodiment, the rack and pinion system is used to maintain high dimensional accuracy as the support member 8 moves. For this reason, a pinion 7 is attached to the linear drive motor 6, and the pinion 7 meshes with a rack attached to the side of the support member 8.

The support member 8 is configured as a rod-shaped member with a preset length. The length of the support member 8 is not limited, and is preferably set appropriately according to the size of the figure to be cut. However, when the support member 8 moves in either direction, the support member 8 becomes a cantilever beam, so it is configured to be able to exert a sufficiently large rigidity. In addition, ball-shaped guides that rotate in contact with the surface of the material to be cut may be provided at both ends of the support member 8.

A tracing section 10 is disposed at one end of the support member 8, and a cutting section 15 is disposed at the other end. In this embodiment, a CMOS camera 11 is used as the tracing section 10, and a gas cutting torch 16 is used as the cutting section 15.

The tracing unit 10 can be any device capable of tracing the edge or center of a line of a template that constitutes a drawing. In addition to a CMOS camera, other tracing devices such as a CCD camera or an optical tracing device can be used. The cutting unit 15 can be any device capable of cutting the material to be cut, and cutting torches such as a gas cutting torch and a plasma cutting torch can be used.

The tracing center 11a of the CMOS camera 11 constituting the tracing section 10 and the center of the gas cutting torch 16 constituting the cutting section 16 are located on a line 14 that passes through the center of the pivot 1 and is parallel to the support member 8. Therefore, when the drawing is traced by the CMOS camera 11, the gas cutting torch 16 draws a symmetrical figure with the pivot 1 at the center.

Inside the main body B, a control panel 20 is arranged to control the direction and speed of rotation of the swivel motor 2 and the linear drive motor 6. This control panel 20 is configured with a control unit 21 that receives as input the output signal of the tracing control unit 12 of the CMOS camera 11, a driver 22 for the swivel motor, a driver 23 for the linear drive motor, a switch 24 for operating the individual operations of the cutting device A, and a power source 25.

Next, the operation when the cutting device A configured as described above traces drawing D will be described with reference to FIG. 6. First, the tracing center 11a of the CMOS camera 11 is aligned with drawing D, and in this state, a preset range (range of distance r from the tracing center 11a) is scanned to detect the target point 11b in the direction of the arrow a to proceed. Then, the tracing control unit 12 uses the line 14 connecting the center of the rotation axis 1 and the tracing center 11a as a reference, and outputs measurement data of the distance l and angle θ in the direction along the line 14 to the control unit 21. Based on the input measurement data, the control unit 21 transmits the control amounts l and θ to the rotation motor driver 22 and the linear drive motor driver 23, respectively.

The rotating motor 2 and linear drive motor 6 rotate according to the transmitted control amount, rotating the support member 8 around the rotating axis 1 and moving it in a linear direction. By continuing this operation, it is possible to trace drawing D. By operating the gas cutting torch 16 at the same time as tracing drawing D, it is possible to cut the workpiece into the same shape as drawing D, in a symmetrical position around the rotating axis 1.

In addition, by recording data on the control quantities l and θ for the swivel motor 2 and linear drive motor 6 in the memory unit that constitutes the control unit 21, the next time the same shape is cut, it is possible to execute the process by reading out the stored data without having to trace the drawing again.

For example, if the area of the workpiece is small and the installation position of drawing D is the same as the cutting position of the target figure, the data of the control amount l and θ for the swivel motor 2 and the linear drive motor 6 are recorded by tracing drawing D as described above. Then, the switch 24 is operated to rotate the swivel shaft 1 by 180 degrees, and the rotation coordinate axis of the swivel motor 2 stored in the control unit 21 is added by 180 degrees. This operation makes the swivel position of the gas cutting torch 16 the same as the position of the tracing center when tracing drawing D. Therefore, thereafter, by reading and controlling the stored data of the control amount l and θ for the swivel motor 2 and the linear drive motor 6, it becomes possible to cut the target figure with the gas cutting torch 16.

A handle 17 is attached to the top of the rotating body C, which the worker grasps when transporting. Therefore, no matter where the material to be cut is located, by grasping the handle 17, it is possible to easily transport it and perform cutting work.

In addition, a magnet 18 is arranged inside the main body B, and when the material to be cut is a steel plate, the magnet 18 is configured to attract the steel plate and stabilize it. Therefore, when the support member 8 moves, it is possible to maintain a stable state even if the balance deteriorates due to the influence of the weight of the tracing portion 10 and cutting portion 15 arranged on the support member 8.

The cutting device of the present invention is a small, portable cutting device that can be used as a gas cutting device or a plasma cutting device.

A Cutting device B Main body C Swivel body D Drawing 1 Swivel shaft 2 Swivel motor 3 Gear train 5 Roller 6 Linear drive motor 7 Pinion 8 Support member 10 Copying unit 11 CMOS camera 11a Copying center 11b Target point 12 Copying unit control unit 14 Line passing through the center of the swing shaft 15 Cutting unit 16 Gas cutting torch 17 Handle 18 Magnet 20 Control panel 21 Control unit 22 Swivel motor driver 23 Linear drive motor driver 24 Switch 25 Power source

Claims (2)

A cutting device that cuts a workpiece by tracing a shape or line corresponding to the shape to be cut,
A pivot axis arranged perpendicular to the machining surface;
A rotation drive unit that drives the rotation shaft;
a linear guide member disposed at a position spaced apart from the pivot shaft and driven by the pivot shaft to pivot;
A rod-shaped support member that moves linearly while being guided by the linear guide member;
A linear drive unit that linearly reciprocates the support member;
a tracing unit that is disposed on one end side of the support member on a straight line passing through the center of the pivot shaft and traces a shape or line corresponding to a shape to be cut;
a cutting portion disposed on the other end side of the support member and on a straight line passing through the center of the pivot shaft;
a control unit which stores data on an angle and a distance from the center of the tracing unit, based on a straight line passing through the center of the pivot shaft detected by the tracing unit, to a target point on a mold or line corresponding to the shape to be cut, and controls the turning drive unit and the linear drive unit according to the stored data on angle and distance;
A cutting device comprising: A main body that accommodates the rotating shaft and the rotating drive unit;
A rotating body is disposed on the upper part of the main body so as to be rotatable, and the linear guide member and the linear drive unit are disposed so as to protrude from a side surface of the rotating body.
2. The cutting device according to claim 1, further comprising:

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