JPH0438557B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device capable of neatly drilling a through groove of an appropriate diameter in a composite material, particularly a composite plate made by laminating a hard member and a flexible member together, without destroying the flexible member. . For example, to drill a through hole with a diameter of 8 mm in a composite plate made of a metal plate (0.27 mm colored steel plate), synthetic resin foam, and kraft paper laminated in this order, there are two methods: using a drill from the metal plate surface, or punching it with a press. One of the following methods has been adopted. However, the above-mentioned method has the disadvantage that the synthetic resin foam cannot be neatly perforated. Further, in the method (2), the synthetic resin foam was deformed over a wide range other than the perforated area, and the fragile synthetic resin foam was destroyed. In order to eliminate these drawbacks, the present invention has a blade having a two-step cutting structure depending on the object to be drilled, which eliminates deformation and destruction of the object to be drilled, and allows for a beautiful finish on the end and inner wall. The purpose of the present invention is to propose a compact and inexpensive drilling device for composite materials that can accurately drill holes of a predetermined diameter. An embodiment of the apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of the above-mentioned device, and 1 is a punch;
For example, as shown in FIG. 2, among a composite material D consisting of a hard member A, a flexible member B, and a sheet-like material C,
It works together with a die 20 (to be described later) to drill a through hole h of a predetermined diameter in the hard member A, and also functions as a drive mechanism for the cutting blade 7 . That is, the punch 1 has a mounting part 2 for fixing it to a ram etc., a guide groove 3 for driving the cutting blade, and a hard member perforating blade (hereinafter simply referred to as the upper blade) 4 at the upper end of the columnar body and at the middle. and the lower end.
The blade portion of the upper blade 4 is formed at the tip 5 of the lower end of the columnar body, and its diameter do may be determined separately depending on the purpose. Further, the guide groove 3 is for connecting the punch 1 and the cutting blade 7 and for linearly reciprocating the cutting blade 7 .
Furthermore, a locking portion or an implanted locking piece 6 is disposed at, for example, the boundary between the upper end and the middle portion. The cutting blade 7 is used to cleanly perforate the flexible member B and the sheet-like material C without affecting anything outside the predetermined range. Specifically, the cutting blade 7 includes upper and lower end cylinders 8 and 9, hollow portions 10 and 11 thereof, a flexible member punching blade 12 (hereinafter simply referred to as the punching blade), a storage groove 13, and a connecting pin 14. , a bearing 15 , and a stopper receiver 16 provided between the cylindrical bodies 8 and 9 . Furthermore, to explain, the upper end cylindrical body 8 houses the middle part and the lower end of the punch 1 , and also houses and guides the lower end of the elastic body, which will be described later, on the upper end surface of the hollow part 10 that is reciprocatably mounted. A storage groove 13 and a connecting pin 14 implanted near the upper end and connecting the cutting blade 7 and the punch 1 are provided. Further, the lower end cylinder 9 has a hollow portion 1 in which the upper blade 4 is reciprocatably accommodated.
A perforating blade 12 having a numeral 1 formed on the tip end face is formed. Furthermore, the bearing 15 is fitted into the hollow portion 10 and is provided to allow the punch 1 to move smoothly. The stopper receiver 16 is for limiting the moving distance (stroke) of the cutting blade 7 , and as shown in the figure, the end face formed by the dimensional difference between the upper and lower end cylinders 8 and 9 may be used. In addition,
The structure of the cutting edge 12a of the punching blade 12 is formed as shown in FIGS. 3a to 3d. The cross section of the end of the through hole E thus drilled becomes the cross section of FIG. 4 a in the case of the piercing blade shown in FIGS. This is shown in Figure b. 17 is an elastic body, for example a spring body, and the punch 1
It is interposed between the connecting portion of the cutting blade 7 and the cutting blade 7 , and provides a buffering effect, a smooth movement effect, an extensible distance maintaining function, and a return effect between these two members. Furthermore, the elastic body 17 instantly imparts elasticity to the cutting blade 7 when the punching blade 12 contacts the flexible member B, the sheet-like material C, or the flexible member B and perforates the material, thereby making the end of the wood beautiful. It is also useful for cutting. A slideable stopper 18 limits the stroke of the cutting blade 7 , and a through hole or notch (not shown) 19 allows the piercing blade 12 of the cutting blade 7 to pass through and stops the stopper receiver 16. It is set up. Of course, stopper 18 is punch 1 ,
It is fixed separately from the cutting blade 7 . A die 20 functions as a lower blade of the punch 1 and also acts as a pedestal on which the composite material D is placed. Note that the die 20 is provided with a tapered through hole 21 through which the upper blade 4 passes, and removes chips from the hollow portion 11 to the outside. Next, the operation of the above device will be explained. First, the composite material has the structure shown in Figure 2, where the hard member A is a 0.27 mm collar steel plate, and the flexible member B
A synthetic resin foam (polyurethane foam (density 30 kg/m, ³ -cell cell structure)) was used as the material, and 190 g/m ² kraft paper was used as the sheet material C, a composite material in which both parts were glued together when forming the polyurethane foam. It is. Further, it is assumed that the through holes E are drilled one by one with d ₁ =10 mmφ and t (thickness) of 10 mm as shown in FIG. In Fig. 1, S ₁ is the stroke of the upper blade 4, S ₂ is the stroke of the cutting blade 7 , S ₃ is the distance from the tip of the upper blade 4 to the tip of the punching blade 12, and S ₄ is the distance of the composite material D. This is the distance between the tip 12a of the punching blade and the stopper 18.
is fixed to the press body (not shown). Further, the composite material D was placed on the die 20 as shown, and the ram (not shown) of the press machine was set to a stroke of _S5 . Then, the punch 1 at the starting point shown in FIG. 6 descends linearly in the direction of arrow A, and following this, the cutting blade 7 descends and cuts the sheet material C as shown in FIG. The sheet material C is punched and the flexible member B made of polyurethane foam is also punched, and the stopper receiver 16 comes into contact with the stopper 18 and stops. In other words, the cutting blade 7 stops at the position shown by the two-dot chain line, and the through hole E is bored in the sheet material C and the flexible member B made of polyurethane foam. Furthermore, even if the cutting blade 7 stops descending, the punch 1 continues to descend, moves by a distance _S5 , punches the hard member A made of a collar steel plate, and then descends further as shown in Fig. 8. Tapered through hole 2 for removing chips
1. Note that the movement limit of the punch 1 is defined by the movement distance of the ram itself. Next, after drilling, the punch 1 moves the cutting blade 7 to the elastic body 17 and the pin 1 as the ram rises in the direction of the arrow B.
4 and return to its original position. Therefore, in order to drill a plurality of through holes E, it is sufficient to perform the above-described operations in sequence.
Note that FIG. 9 is an explanatory diagram showing the movement locus of the punch 1 and the cutting blade 7 , where the solid line corresponds to the punch 1 and the half line corresponds to the cutting blade 7 . In addition, the point is the time point at which the sheet C is cut, the range is the cutting time of the flexible member B made of polyurethane foam, and the range is the cutting time of the cut sheet C and the flexible member B made of polyurethane foam. The time during which the upper blade 4 is compressing the inside of the hollow portion 11 is the time when the upper blade 4 punches out the hard member A made of a colored steel plate. What has been described above is only one embodiment of the perforating device for composite materials according to the present invention, and for example, as shown in FIGS.
It is also possible to form holes 0 and 11 and drill corresponding through holes E. Furthermore, as shown in FIG. 11, a large number of the above-mentioned devices can be mounted on the mounting base 22, and a large number of through holes E can be bored at one time. Furthermore, as shown in FIG. 12, the cylindrical bodies 8 and 9 may be formed of cylindrical bodies 8' having the same diameter. In addition,
In the figure, 16a' is provided with the same function as the stopper receiver 16, and the pin 23 functions as a locking pin for the elastic body 17. Figure 13a and b are the upper blade 4
and other embodiments of the perforating blade 12, in which the lower end part of the upper blade is partially replaceable in figure a, and the lower end cylindrical body 9 is the same as the hollow part 10 in figure b. The hollow part allows large-diameter through holes to be drilled with the same device. As described above, according to the perforating device for composite materials according to the present invention, a composite material made of a combination of materials with completely different properties, such as a core material of a foam tissue and a soft flexible member, is used as a hard member. Two types of upper blades and cutting blades are used to perform cutting and drilling, respectively, to obtain beautiful cut edges and side walls. That is, in order to cut and perforate the flexible member, which is relatively soft and easy to tear or crush, and the core member, which has a foam-like structure, with the serrated thin-walled cutting edge formed on the end surface of the cylinder, both of the above-mentioned members can be cut and punched. It can be cut and punched into a cross-sectional shape of a predetermined size without tearing the vicinity of the cut end due to tension when shearing it, or crushing the core material when shearing it. In addition, the cut and punched waste is stored in the punching blade and is finally discharged outside while being completely separated from the so-called core material, so the side walls of the hole are beautiful and a hole of a predetermined size can be formed.
Furthermore, since the hard member is punched using a normal punch die, it can be reliably sheared without warping, deformation, or abrasions, and the cut can be beautiful and burr-free. Furthermore, the device has the advantage of being small, inexpensive, and simple in structure, and can be attached to existing devices.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a drilling device according to the present invention, FIG. 2 is a perspective view showing an example of a composite material,
Figures 3 a to d and Figures 4 a and b are explanatory diagrams showing an example of a flexible member punching blade, a vertical sectional view showing the cross-sectional shape of a through hole E drilled by the blade, and Figure 5
The figures are perspective views showing perforated composite plates, Figures 6 to 8.
Figure 9 is an explanatory diagram showing the operation of punch 1 and cutting blade 7 .
The figure is an explanatory diagram showing the locus of the punch 1 and the cutting blade 7 .
0 a to f are perspective views showing other embodiments of the cutting blade 7 , FIG. 11 is a perspective view showing a device equipped with a plurality of devices according to the present invention, FIG. 12, and FIGS. 13 a and b. FIG. 3 is an explanatory diagram showing another embodiment. 1 ... Punch, 7 ... Cutting blade, 17... Elastic body.

Claims (1)

[Claims] 1. A columnar punch with a hard member punching blade formed at the lower end and a vertical guide groove formed in the middle part;
The punch has a hollow part in which the lower end and the middle part are slidably built in, and a cutting blade formed with a perforating blade such as a flexible member at the tip of the lower end cylindrical body, and the cutting blade is used to move the punch. a connecting pin that is caused to follow through the guide groove, an elastic body that is interposed between the punch and the cutting blade with the punch as the axis, and a height-adjustable stopper that restricts the stroke of the cutting blade in the direct downward direction; A punching device for a composite material, characterized in that the die of the punch is provided below a stopper.