JPH04315514A - Shearing method and device therefore - Google Patents

Abstract

PURPOSE:To perform a shearing work by preventing production of burrs since when burrs are produced on the back of the broken surface of a work during shearing of the work by means of a shearing machine, it is troublesome to remove the burrs. CONSTITUTION:A cutter 1 having a cutting part 5 having notches 5A and 5B formed in a V-shape and a work are set in a state that the central part in the direction of thickness (d) of a work W is positioned at a bottom part 5C of and between the notches 5A and 5B. The cutter 1 is located to a nut member 15 joined in a screwed-in state with a ball screw 11 interlocked and coupled to a drive motor 13 serving as a drive device so that the cutter 1 is movable over a work W surface. Through movement of the cutter 1 toward the work W, a shearing work is carried out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new shearing method and apparatus for shearing a workpiece.

0002

[Prior Art] Conventional shearing methods for shearing workpieces such as sheet metal materials include a shearing machine using a guillotine-like blade, and a press machine using a punch and die. are mainly known.

0003

[Problems to be Solved by the Invention] However, in the conventional shearing method described above, the blade moves in one direction perpendicular to the surface of the workpiece such as a sheet metal material, so the sheared surface and the fractured surface are separated. is generated, and burrs are generated at the bottom of the fracture surface.

As a result, the shearing machine or press machine itself is damaged by the burrs attached to the back side of the fractured surface. In addition, it is necessary to remove burrs from the back of the fractured surface in a subsequent process. Furthermore, when producing a three-dimensional box-shaped product, for example, there is a problem in that the bending direction must be limited so that the front surface of the workpiece is on the outside of the product (the surface that is visible to the eye).

[0005] The purpose of the present invention is to improve the above-mentioned problems by moving a cutter within the surface of the workpiece to realize shearing without distinguishing between the back and front sides of the workpiece, thereby eliminating the occurrence of burrs. It is an object of the present invention to provide a shearing method and an apparatus therefor that facilitate handling of a workpiece in a subsequent process.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cutter having a blade portion having a V-shaped notch, and a bottom of the notch in this cutter is located at the center of the thickness of the workpiece. This is a shearing method characterized by moving a workpiece set to be located at a position relative to the workpiece and shearing the workpiece with the blade of a cutter.

[0007] Furthermore, the present invention provides a cutter having a blade portion having a V-shaped notch, and in a state where the center portion of the thickness of the workpiece is set at the bottom of the notch in the cutter, the cutter is placed on the workpiece surface. The shearing device includes a drive device that is interlocked with the cutter so as to move the cutter freely.

[0008]

[Operation] By employing the shearing method and device of the present invention, a blade is provided with a blade portion having a V-shaped notch, and the bottom of the notch in this blade portion is located at the center of the thickness of the workpiece. By moving the workpiece set to be cut relative to the workpiece, the workpiece is sheared with the blade of the cutter. Thus, no burrs are generated on the back side of the workpiece, and shearing is performed without distinction between the back side and the front side. As a result, burrs do not damage the machine or other parts, and there is no need for deburring. In addition, the bending direction in the post-process can be freely selected, making it easier to handle the workpiece in the post-process.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail with reference to the drawings.

First, the cutter 1 used in this embodiment will be explained with reference to FIGS. 1 and 2. The cutter 1 is made of a material such as cemented carbide tool steel, ceramics, or diamond, and is composed of a rectangular cutter body 3. A blade portion 5 having V-shaped notches 5A and 5B is formed at the tip of the blade body 3 (the left end in FIG. 1). The bottom portions 5C of the notches 5A and 5B of the blade portion 5 are located at the center of the thickness d of the workpiece W to be sheared.

A shearing device 7 that performs shearing on the work W by fixing the work W to be processed and moving the cutter 1
are shown in FIGS. 3, 4 and 5. 3, 4, and 5, the shearing device 7 has support blocks 9R, 9L erected on both left and right sides, and these support blocks 9R,
Support frame 9 in which 9L is integrated with lower frame 9D
It is equipped with That is, a U-shaped groove 9V is formed by the support blocks 9R, 9L and the lower frame 9D.

A ball screw 11 extending in the X-axis direction (left-right direction in FIG. 3) is provided on both upper sides of the support blocks 9R and 9L, and the left end of this ball screw 11 is provided inside the support block 9L. The ball screw 11 is rotatably supported by a bearing, and the right end of the ball screw 11 is operatively connected to a drive boat 13 attached to the support block 5R.

A nut member 15 is screwed onto the ball screw 11, and the above-mentioned cutter 1 is provided at the bottom of the nut member 15. A guide member 17 extending in the X-axis direction is provided at the upper part of the lower frame 9D, and both sides of the guide member 17 are connected to the support block 9R.
, 9L, and has an appropriate thickness between the lower frame 9D and the guide member 17 in the vertical direction, for example.
By biting, the center portion of the workpiece W with respect to the plate thickness d is adjusted to be located at the bottom portion 5C of the notches 5A and 5B. Further, the cutter 1 may be finely adjusted in the height direction using the nut member 15.

With the above configuration, the workpiece W to be machined is placed on the guide member 17 and fixed by, for example, a workpiece 7 lamp (not shown). At this time, the height of the cutter 1 is finely adjusted in advance so that the center part of the plate thickness d of the workpiece W is located at the bottom 5C of the notches 5A and 5B of the cutter 1. And drive motor 1
3, the ball screw 11 is rotated. Since the nut member 15 is screwed onto the ball screw 11, when the ball screw 11 is rotated, the cutter 1 is moved to the left in the X-axis direction in FIGS. 3 and 4 via the nut member 15. It turns out. Thus, the blade portion 5 of the cutter 1 is moved within the plane of the workpiece W, and the workpiece W is sheared.

The shearing state of the workpiece W when sheared by the blade portion 5 of the cutter 1 is as shown in FIG. Shearing processing can be performed. As a result, no burrs are generated on the workpiece W, and the workpiece W can be easily handled in the subsequent process. Further, since no burrs are generated on the workpiece W, there is no need to remove burrs, and the machine or other parts are not damaged by the burrs.

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in other embodiments by making appropriate changes. In this example, the work W
The explanation has been given using an example in which the cutter 1 is fixed and the cutter 1 is moved to perform shearing on the workpiece W. However, as shown in FIG. Moreover, support blocks 9R and 9L are provided.
By providing a work table 23 between which is formed a slit through which the cutter 1 can pass, it is possible to shear the work W by moving it relative to the fixed cutter 1. That is, by driving the drive motor 13, the ball screw 11 rotates, and the work clamp 21, which clamps the work W through the nut member 15, moves to the left in the X-axis direction in FIG. W is subjected to shearing. The effects in this case are the same as those in the above-mentioned embodiment, so the explanation will be omitted. Note that an auxiliary work table 25 for supporting the work W is provided on the left side of the support block 9L.

Furthermore, although the shearing device 7 is placed horizontally,
There is nothing wrong with leaving it as is.

[0018]

[Effects of the Invention] As can be understood from the above description of the embodiments, since the present invention has the configuration as described in the claims, it is possible to relatively move the workpiece and the cutter. This makes it possible to perform shearing without distinguishing between the back and front sides of the workpiece, prevent burrs from forming on the workpiece, and facilitate handling of the workpiece in subsequent processes.

[Brief explanation of drawings]

FIG. 1 is a front view of a cutter which is the main part of this invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view of a shearing device according to an embodiment of the present invention.

FIG. 4 is a plan view in FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is an explanatory diagram showing a state diagram after shearing according to the present invention.

FIG. 7 is a front view showing another embodiment in place of FIG. 3;

[Explanation of symbols]

1. Cutlery 3　Knife body 5A, 5B Notch 5 Blade part 7 Shear processing equipment 9 Support frame 11 Ball screw 13 Drive motor 15 Nut member 17 Guide member

Claims (2)

[Claims] [Claim 1] A blade having a blade having a V-shaped notch and a workpiece set so that the bottom of the notch in the blade is located at the center of the thickness of the workpiece are relatively moved. A shearing method characterized by shearing a workpiece with the blade of a cutter. 2. A cutter having a blade portion having a V-shaped notch, and a center portion of the thickness of the workpiece set at the bottom of the notch in the cutter, the cutter being movable on the work surface. A shearing device comprising: a drive device operatively connected to a blade for movement.