JPS62880Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vibratory drilling device that uses repeated shear energy to drill holes in polymer composite materials and the like.

Polymer composite materials are light, strong, and tough materials because they contain fibers, but when drilling holes in this material using a conventional drill, the drilled surface is laminated. Because it is made of fibrous material, it becomes fluffy and sometimes peels off at the boundaries of laminated layers, and burrs inevitably form in the holes. Furthermore, it is almost impossible to drill holes in various shapes using a broach or the like.

In order to solve these problems, it is conceivable to punch the workpiece from above and below, vibrate the punch, and repeatedly apply shearing energy while feeding one side to punch the hole. In this case, it is possible to make a clean hole without burrs with high precision by melting a part of the machined surface due to shear heat caused by repeated shearing and the ironing effect of the outer periphery of the vibrating punch, but it is possible to drill a clean hole without burrs with high precision. When changing the setup by replacing the vibrating punch or die that matches the hole shape, it is troublesome to replace the vibrating punch or die.
There is a need for a hole-drilling device that allows easy replacement of the vibrating punch and die, shortens setup time, has a rigid device body, and is easy to maintain.

This idea aims to provide a vibratory drilling device that utilizes repeated shear energy in response to these demands.The device has a box-shaped device body fixed to a column, and a C-shaped excitation frame that can move up and down. The rod end of the excitation/feeding device fixed to the bottom of the main body is fixed to the C-shaped frame by passing through the lower arm of the C-shaped frame, and a C-shaped bracket is attached to the table surface in the middle of the main body. The lower die is attached to the lower arm of the bracket so that it can be inserted into the T-groove provided at the rod end of the vibration device. a through hole is provided in the upper arm of the bracket to allow the upper die to fit therein, and an upper vibrating punch is slidably fitted in the through hole of the upper die, and a spring is provided to bias the upper vibrating punch upward; The lower end of the upper vibrating punch and the upper end of the lower vibrating punch were arranged at the upper end of the upper die, and the presser foot and receiver were fixed to the rod of the workpiece holding cylinder fixed to the outside of the upper part of the device body. This invention relates to a vibratory drilling device in which a flange is insertably incorporated and the shaft end of a workpiece tightening device fixed to the upper part of a C-shaped frame can be brought into contact with the upper end of an upper vibrating punch.

Embodiments of this invention will be described in detail below with reference to the drawings. The main body 1 of the apparatus has a box shape and is fixed to a column (not shown). The main body 1 has a rectangular sliding surface on its inner surface, and a C-shaped frame 2 for excitation is installed so as to be movable up and down. This C-shaped frame 2 is fixed with a nut 5 to a rod 4 of a vibrator 3 for excitation and feeding, which is fixed to the lower part of the main body 1. Further, a workpiece tightening device 7 consisting of a torque motor 6 and a screw mechanism is fixed to the upper part of the C-shaped frame 2. The screw mechanism is fixed to the shaft end of the torque motor 6 and has a male screw 8 that can be rotated in forward and reverse directions, and is fitted into a hole at the top of the C-shaped frame. Natsuto 1 who can
0, and the lower part of the nut is shaft-shaped.

A C-shaped bracket 12 is placed on a table 11 in the middle of the main body 1, and is positioned and fixed with bolts 13 and pins 14. A lower die 15 is fixed to the lower part of the bracket 12, and a lower vibrating punch 16 is slidably fitted into the lower die 15. A collar 17 is provided at the lower end of the lower vibrating punch 16, and is adapted to be inserted into a T-slot 19 provided at the upper end of the vibrating rod 4.

Further, an upper die 22 having a collar 23 at its upper end is slidably fitted into the through hole 21 in the upper part of the bracket 12. Note that an upper vibrating punch 26 is slidably fitted into the through hole 25 of the upper die 22, and is not pressed inside when tightening the work by being pressed by the lower shaft-shaped portion of the nut 10 of the work tightening device 7. It is urged upward by a built-in spring 27 and escapes upward.

On the other hand, small cylinders 28, 28 for holding down the workpiece are attached to the left and right sides when viewed from the front of the apparatus main body 1, and both ends of a presser foot 30 are fixed to the rods 29 of the small cylinders 28, 28. Further, a receiver 24 is fixed to the presser foot 30, and the collar 23 of the upper die 22 is incorporated into the portion formed by the presser foot and the receiver 24. 31 is a guide rod for the presser foot. Further, 32 is a hydraulic cylinder whose vibration frequency, amplitude waveform, amplitude, etc. of the vibration excitation device are variable; 33 is a servo valve;
4 is a controller that controls the servo valve.

To drill a hole with the vibratory drilling device of this invention, first, a workpiece 35 such as a polymer composite plate is placed on the lower die 15. Next, the cylinders 28, 28 are operated to press down the upper die 22 and clamp the workpiece 35 between the upper die and the lower die. Next, the torque motor 6 is driven to lower the nut 10 and the workpiece 35 is tightened between the upper vibrating punch 26 and the lower vibrating punch 16. In this state, the vibration device 3 is activated to repeatedly apply a vibration shear load to the workpiece 35, and the vibration device 3 feeds the entire vibrating section upward, thereby drilling a hole in the same shape as the cross-sectional shape of the punch. Can be done. In this way, since the workpiece is cut by repeatedly applying shearing force, the inner surface of the hole is clean and shiny due to the melting of some processed surfaces due to shear heat due to shear heat, and the ironing effect of the outer peripheral surface of the vibrating punch, with less burr. It is possible to perform precise hole machining. When replacing the vibration punch or die, tighten the bolt 20 to fix the lower vibration punch to the lower die 15, then loosen the bolt 13 and pin 14 and remove the bracket 12 from the main body 1. It is sufficient to replace the upper and lower vibration punches 26 and 16 and attach them to the main body 1 again. If you have a spare bracket, you can replace it faster by installing the punch and die in advance.

In this invention, as mentioned above, the upper and lower dies and the upper and lower vibrating punches are built into the bracket, so the entire bracket can be replaced together, and the setup time can be significantly shortened. Furthermore, since the device main body 1 is box-shaped, it has high rigidity and improves the accuracy of hole machining of the workpiece. Furthermore, since the cylinder 28 for holding the workpiece is mounted outside, many excellent effects such as easy maintenance can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of this invention, and FIG. 2 is a vertical sectional view taken along the line -- in FIG. 1...Device main body, 2...C-shaped frame, 3...
... Vibration device, 4 ... Rod, 7 ... Work tightening device, 11 ... Table, 12 ... Bracket, 1
5...Lower die, 16...Lower vibration punch, 22...
Upper die, 26... Upper vibration punch, 27... Spring, 28... Work holding cylinder, 30...
Presser foot.

Claims (1)

[Scope of utility model registration request] A C-shaped excitation frame is installed in the device body fixed to the column so as to be movable up and down, and the C-shaped excitation frame is attached to the rod of the excitation device for both excitation and feeding, which is fixed to the lower part of the device body. The upper die with the upper vibrating punch slidingly fitted into the bracket is fixed removably on the table in the middle of the device body, and the lower die with the lower vibrating punch slidingly fitting is fitted into the bracket. The die is attached and the upper vibration punch is urged upward by a spring, and the shaft end of the workpiece tightening device fixed to the top of the C-shaped frame can be brought into contact with the upper end of the upper vibration punch, and the lower vibration punch is The lower end of the upper die can be inserted into the T-groove provided at the rod end of the vibrating device, and the upper end of the upper die can also be inserted using a presser foot and a receiver connected to a workpiece holding cylinder attached to the outside of the upper part of the main body. A vibrating drilling device characterized by being incorporated into.