JPH05200621A - Cutter - Google Patents

Abstract

PURPOSE:To elongate the lifespan of a cutting tool by reducing the cutting resistance to the cutting tool at the time of cutting. CONSTITUTION:A work W is put on a worktable (work holder) in front thereof and behind 11F, 11B, and the both ends of the work is gripped by a work clamp WC. The work clamp WC is provided on the front end of a piston rod 15 of a fluid cylinder 13, and the work W is extended to both front and rear sides thereof. A cutting tool 19 installed in a nut member 17 is moved during cutting process, since the cut part of the work W is extended to a direction crossing the cutting direction, and a ball screw is rotated by a driving motor 7, the cutting tool 19 will not be sandwiched between the work W cut into two. The frictional resistance thus will not work on the cutting tool 19, and the lifespan of the cutting tool 19 itself can be elongated without changing the strength of the cutting tool, while high quality cutting process is achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device, and more particularly to a cutting device for cutting a work by moving a blade relative to the work.

[0002]

2. Description of the Related Art As one of the devices for cutting a work such as a sheet metal material, a single blade having a blade having a V-shaped notch is used. There is a device that cuts the work by moving to.
According to this device, the front and back of the work are not distinguished and burrs are not generated. For this reason, the post-process for removing the burr is unnecessary, and the work efficiency is improved.

[0003]

However, in such a conventional technique, the resistance to the movement of the blade with respect to the work becomes a problem. That is, there is a problem that the life of the cutting tool is shortened when the cutting resistance applied to the cutting tool is increased.

The present invention has been made by paying attention to such a conventional technique, and provides a cutting device for extending the life of the cutting tool by reducing the cutting resistance to the cutting tool at the time of cutting.

[0005]

In order to achieve the above-mentioned object, a cutting device according to the present invention pulls a cutting tool having a cutting blade having a notch and a work so as to spread in a direction orthogonal to the cutting direction. A work holding device for holding in a state,
And a moving device for moving the blade relative to the workpiece in a state where the workpiece is arranged at a position corresponding to the bottom of the notch of the blade.

[0006]

According to the cutting device of the present invention, the work is held by the work holding device while being always pulled in the direction orthogonal to the cutting direction. That is, the blade is moved by the moving device to perform the cutting process while expanding the cut portion of the workpiece in the direction perpendicular to the cutting direction, so that the cut workpiece does not pinch the blade.
Therefore, since the frictional resistance between the blade and the work can be greatly reduced, the life of the blade can be extended without changing the strength of the blade itself, and high-quality cutting can be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the cutting device 1 is
Front and rear (Y-axis direction in the figure) edge portions of the rectangular lower frame 3A are provided with front and rear support blocks 3F and 3B having high rigidity, and left and right (X axis direction in the figure) edge portions also have high rigidity left and right support. It has a frame 3 constructed by vertically arranging blocks 3L and 3R. Then, the left and right support blocks 3
A ball screw 5 as a moving device is rotatably provided between L and 3R along the X-axis direction. That is, the left end of the ball screw 5 is rotatably supported by a bearing (not shown) provided in the left support block 3L, and the right end of the ball screw 5 is a drive motor 7 provided on the right side of the right support block 3R. Is linked to.

A guide member 9 having a rectangular groove 9A along the X-axis direction is arranged on the upper surface of the lower frame 3A, and the work holding device is provided on the upper surface of the guide member 9 with the groove 9A interposed therebetween. Front and rear worktables 11F, 1
1B is provided horizontally. Front work table 11F
The four sides are fixed by the front support block 3F, the left and right support blocks 3L and 3R, and the guide member 9, and the rear work table 11B is the rear support block 3B and the left and right support blocks 3L,
Four sides are fixed by 3R and the guide member 9.

A plurality of work clamps WC for clamping the front and rear edges of the work W are provided on the front side of the front work table 11F and the rear side of the rear work table 11B. Each work clamp WC is connected to the tip of a piston rod 15 of a large number of fluid cylinders 13 provided on the upper surfaces of the front and rear support blocks 3F and 3B, and is movable in the Y-axis direction by driving the fluid cylinders 13. ing.

A nut member 17 is screwed onto the ball screw 5, and a knife 19 is attached to the lower surface of the nut member 17.
Is provided, and the lower end portion of the blade 19 is movable along the inside of the groove 9A of the guide member 9. Therefore,
The drive motor 7 rotates the ball screw 5 to rotate the nut member 1
Even if 7 is moved in the X-axis direction, the nut member 17 and the blade 19 will move without rotating (see FIG. 3).

On the other hand, as shown in FIG. 4 and FIG.
9 is, for example, an entire rectangular shape made of cemented carbide tool steel, ceramics, diamond, and the like, and a pair of linear blade portions 21 is provided at the tip portion (left end portion in FIG. 4) of the blade 19.
A V-shaped V notch 23 is formed by U and 21L. Here, in a state where the V notch bottom portion 25 where the blade portion 21U and the blade portion 21L intersect is positioned so as to be positioned at the center of the workpiece W to be cut in the plate thickness D direction, the blade portion 2
1U and 21L are attached to the lower side of the nut member 17.

Next, the cutting process will be described.

First, the nut member 17 equipped with the cutting tool 19
Is placed near the right end of the ball screw 5, the work W is placed on the upper surfaces of the front and rear work tables 11F and 11B, and the front and rear edges of the work W are clamped by the work clamp WC. At this time, the height position of the blade 19 is adjusted and attached to the nut member 17 so that the V-notch bottom portion 25 of the blade 19 is located at the center of the workpiece W in the plate thickness D direction. And
All the fluid cylinders 13 are operated to urge the piston rods 15 to spread the work W in the Y-axis direction. That is, since the piston rod 15 cannot move even if the fluid cylinder 13 is actuated before cutting, the force is always urged in the direction in which the work W is expanded. In this state, the drive motor 7 drives the ball screw 5
Is driven to rotate and the nut member 17 is moved leftward to cut the work W leftward by the blade 19. Therefore, as the blade 19 moves, the work W of the cut portion is pulled outward by the fluid cylinder 13 and spreads out (see FIG. 1).

As described above, since the cut portion of the work W spreads back and forth, the work W does not pinch the blade 19 as in the conventional case, and the frictional resistance during cutting is greatly reduced. As a result, an unreasonable force does not act on the blade 19, so that the service life is extended, and since an unreasonable force is not exerted on the ball screw 5 and the nut member 17 as well, the life of the entire device is extended.

In the above embodiment, an example in which the combination of the ball screw 5 and the nut member 17 is used as the moving device has been described, but the present invention is not limited to this, and for example, a rack and pinion may be used. Even if the blade 19 is moved using a wire, the same operation and effect can be obtained.

Further, the mounting position of the blade 19 with respect to the nut member 17 is adjusted so that the V-notch bottom portion 25 of the blade 19 is located at the center of the work W in the plate thickness D direction, but the present invention is not limited to this. The height positions of the blade 19 and the work W may be adjusted by adjusting the height of 11B. That is, the work tables 11F, 11
Even if B is attached to the frame 3 via the height adjusting device to adjust the height, the same effect can be obtained.

Further, in the above embodiment, the work W
Although the fluid cylinder 13 is used to urge the force in the direction of expanding, the invention is not limited to this.
Similar effects can be obtained even if springs are provided at F and 3B, and the work clamp WC is attached to the tip of the spring, and the work W is gripped and pulled outward in the front and rear direction.

Further, in the above embodiment, the work W is fixed to the work tables 11F and 11B fixed to the frame 3 and the cutting tool 19 is moved with respect to the work W to perform the cutting process, but the present invention is not limited to this. Absent. That is, the blade 1
9 is fixed to the left support block 3L, the fluid cylinder 13 is fixed to the front and rear work tables 11F and 11B, and the front and rear work tables 11F and 11B can be integrally moved in the X-axis direction.
The work W fixed to 1B can be moved with respect to the blade 19 to perform the cutting process.

[0020]

The cutting device according to the present invention is constructed as described above, and the work is held by the work holding device while being pulled so as to spread in the direction orthogonal to the cutting direction. That is, while expanding the cut part of the work in the direction orthogonal to the cutting direction,
Since the moving device relatively moves the blade with respect to the work to perform the cutting process, the cut work does not pinch the blade as in the conventional case. Therefore, since the frictional resistance between the blade and the work can be greatly reduced, the life of the blade can be extended without changing the strength of the blade itself, and high-quality cutting can be performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire embodiment of a cutting device according to the present invention.

FIG. 2 is a side view seen from the direction of the arrow II in FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a front view showing a blade.

FIG. 5 is a side view seen from the direction V in the arrow in FIG.

[Explanation of symbols]

 1 Cutting Device 5 Ball Screw (Moving Device) 7 Drive Motor (Moving Device) 11F, 11B Work Table (Work Holding Device) 17 Nut Member (Moving Device) 19 Blade 21U, 21L Blade 23 V Notch (Notch) 25 V Notch Bottom (Notch bottom) W work WC work clamp (work holding device)

Claims (1)

[Claims] 1. A blade having a notched blade, a workpiece holding device for holding the workpiece in a pulled state so as to spread it in a direction orthogonal to the cutting direction, and a position corresponding to the notch bottom of the blade. And a moving device for moving the blade relative to the work in a state of being arranged in the cutting device.