JPS5815699A - Press device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press apparatus suitable for cutting an object to be cut without causing any cracks therein.

Conventionally, as shown in FIG. 1, as a press device for cutting a workpiece, for example, the upper blade Cv is lowered from above toward the workpiece on a fixed lower i1a. There is a structure in which the material to be cut is punched and cut by sliding it on Ma. However, according to this conventional example, as shown in the diagram d1, simply lowering the upper blade Cv and sliding it into contact with the lower mold 8 results in cutting the workpiece with a perfect shear plane in the thickness direction. However, it is difficult to cut the body to be cut by breaking it.
Therefore, as shown in FIG. 2, there is a drawback that acid chloride is generated at the so-called edge portions of the cut object.

In addition, as shown in Fig. @3, other conventional press devices do not use a lower mold, but instead press the workpiece b on the iron plate e.
There is a device that cuts the object by lowering the upper blade C toward the object to be cut. However, even in this conventional example, as shown in the figure, the upper blade C is Completely in the horizontal direction〈−
However, in the end, the object to be cut must be cut in such a way that it breaks, and as in the conventional example described above, the cut surface of one object to be cut is still covered with paris dv.
Therefore, the objective of the present invention is to provide a press device that can accurately cut objects to be cut without causing any chips! It is about providing.

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides a press device for punching a workpiece by sliding an upper blade onto a lower mold fixed below the upper blade, and attaching the upper edge of the upper blade to the lower mold on both sides. A sharp cutting edge is provided that protrudes from the upper blade toward the upper blade.

The features of the invention will become clearer from the following description of the illustrated embodiments.

IFjJ diagrams are schematic explanatory diagrams showing the structure of a press device according to the present invention. What is indicated by reference numeral 1 in the figure is a lower mold to which a supporting member (not shown) K is fixed, and above the lower mold, another supporting member (not shown) is movably attached to the lower mold 1. The upper mold 2 is assembled. This upper mold 3
Upper blades 3 are attached to both sides of the mold 2 so as to sandwich the upper mold 2 therebetween. The upper blade 3 is positioned such that the blade portion 3a at the tip thereof protrudes from the lower surface 2a of the upper M3. Further, a pair of parallaxes 4 made of an elastic material such as rubber are attached to the blade portion Sa@ of the upper blade 3 on the lower surface a of the upper mold 3. The bat is positioned so that it protrudes from the blade part 3a of the upper blade 3 to the lower mold III.As shown in FIG. A cutting edge is provided which projects oppositely to the cutting edge.The cutting edge is formed to project relatively sharply. As will be described later, the projecting height of the O blade edge tool, in which a thin plate material such as a plastic film or a magnetic sheet is placed as the object 6 to be cut, on the pair of blade edges s is as follows: When cutting the workpiece 6 with the press device according to the present invention having such a structure, first, the workpiece 6 is is placed on the pair of cutting edges S of the lower die 1, the upper Wi3 is lowered, and the workpiece 6 is held and fixed on the lower die 1 by the butt 4. At this time, a cut is made into the object 6 by the height thereof by the cutting edge i of the lower mold l. At the same time, the upper blade 3 that descends together with the upper die 1i1 slides onto the cutting edge S of the lower die 1, and this K
As a result, as shown in FIG. 5, the cut surface 6a of the object to be cut 6 is completely cut as a flat surface without any burrs.

As mentioned above, the depth of cutting into the object to be cut by the cutting tool of the lower die 1 is determined by the protruding height of the cutting edge i, which depends on the thickness of the object to be cut. It is preferable to be about that noise depending on the situation.

Further, the sharply formed cutting edge S can be easily repaired by simply grinding the lower die l.

According to the present invention, the lower die is provided with a cutting edge, and the cutting edge is used to cut the object to be cut, and at the same time, the upper blade is slid together with the lower die to cut the object. The object to be cut can be precisely cut with a perfect sheared surface without causing any cracks on the cut surface.

[Brief explanation of drawings]

Fig. 181 is a schematic explanatory diagram showing a state in which a workpiece is cut by a conventional press device, Fig. 2 is a schematic explanatory diagram showing the shape of a piece of a workpiece cut by a conventional press machine, and Fig. Fig. 4 is a schematic explanatory view showing the structure of the press apparatus according to the present invention; FIG. 2 is a schematic explanatory diagram showing the shape of one piece of the object to be cut. DESCRIPTION OF SYMBOLS 1...Lower mold, 1a...Top edges on both sides of the lower mold, 3...Upper mold, 3...Upper blade, 4.
...Butt, 6...Blade tip of lower mold, 6...
...Object to be cut. Patent applicant Rico Co., Ltd. - Agent Patent attorney Shunsuke Nakao

Claims (1)

[Claims] In a press device that punches out a workpiece by sliding an upper blade onto a lower die fixed below the press device, there are sharp edges protruding from the upper edges of both sides of the target 11 toward the upper blade. A press device characterized by being provided with a cutting edge.