JPS6221427A - Method and device for deep drawing - Google Patents

Abstract

PURPOSE:To execute working by only one piece of vibrator, and to enable changing it with other die by converting an ultrasonic vibration which has been generated by the vibrator, to a radial direction vibration which vibrates by expanding and contracting to a concentric circle shape in the working surface, and executing deep drawing. CONSTITUTION:A vibration of a vibrator for executing a reciprocating motion in a unified axial direction is transferred to a cone 7, and a die bar part 2'-a of a vibration die 2' is also vibrated in the axial direction in the same way. Subsequently, in a die working surface 2'-b, due to a constraint in the axial direction by a blauk holder 1, the vibration in the axial direction is converted to a vibration in the radial direction in a die coupling part 2'-c. In a die disk part 2'-d, a vibration is executed in the radial direction, this vibration is transmitted to a blauk 5 and the blauk itself is vibrated. After an oscillation of the whole vibration system, a pressure oil of a hydraulic pump is made to flow backward and fed and the blauk, by which deep drawing is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention particularly relates to a deep drawing method and apparatus for performing deep drawing on difficult-to-process materials while applying ultrasonic waves.

(Prior Art) For example, there is a deep drawing device shown in FIG. 3 that applies ultrasonic vibration to difficult-to-process materials such as metal plates and plastic plates, which are used to form safety valves for high-pressure gas cylinders. ([Plasticity and Processing J VOI 231'11[1256
(1982-5) ) To explain the main parts of the processing device shown in FIG.
A blank plate 5, which is a workpiece, is inserted between the radial dies 2 to which another vibrator 3 is attached, and then ultrasonic vibrations are mechanically generated by the plurality of radially arranged vibrators. When the vibration is applied to the annular die, expansion and contraction vibration occurs concentrically in the die, so when the punch 4 is raised while pressing the blank by pressing the wrinkle press with a hydraulic press or the like, the blank is pressed. Deep drawing is performed on a blank plate.

(Problems to be Solved by the Invention) However, in the conventional example described above, a plurality of oscillators 3 are required in order to give substantially axially symmetrical vibrations to the die 2, and therefore each of the oscillators has a resonance frequency. In addition, since the vibrator is directly attached to the die, the deep drawing device can only be used for deep drawing. It has problems.

The object of the present invention is to maintain versatility that can be used for purposes other than deep drawing without adding a plurality of vibrators whose resonance frequencies are matched.

(Means for Solving the Problems) The present invention includes a cone for transmitting vibration that is detachably coupled to the rod portion of an annular vibrating die having a protruding die frame portion via a connecting bolt. By attaching a vibrator connected to an ultrasonic generator to the cone, the ultrasonic vibration generated by the vibrator, which makes a one-dimensional reciprocating motion in the axial direction, is applied concentrically to the machining surface of the vibrating die. Deep drawing is performed on the blank plate inserted between the die and the wrinkle presser while converting it into radial vibration that expands and contracts and vibrates.

(Function) Therefore, according to the present invention, deep drawing can be performed by ultrasonic vibration using a single vibrator that does not require matching each resonance frequency, and one vibration die can be replaced with another die. Therefore, it has the versatility to perform processing other than deep drawing.

(Example) Next, an example of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, the die rod portion 2'-a is protruded from the die coupling portion 2'-C in the center of the annular die disk portion 2'-d having the die processing surface 2'-. A cone 7 for transmitting vibrations to the vibrating die is coupled to the die rod portion of the vibrating die 2' through a connecting bolt 8, and the cone is connected to an ultrasonic generator 9 for integrated operation. A vibrator 6 capable of ultrasonic vibration that reciprocates in the axial direction is attached. Furthermore, the vibrating die is provided with a wrinkle presser 1 which can lift a punch 4 for performing deep drawing while inserting a blank plate 5 therebetween and applying ultrasonic vibrations. Further, a control unit 12 that controls an electromagnetic valve 11 that sends and stops pressure oil of a hydraulic pump 10 is connected to the ultrasonic generator, and when the wrinkle presser is pressurized via the unit, the punch is also pressurized. Make sure to supply and stop pressure oil to the hydraulic press that will be raised. Furthermore, the wrinkle presser and the punch are equipped with a recorder 16 and a load meter 14.
be attached. Note that 15 is a power source for the ultrasonic generator 9.

Therefore, in the above-mentioned embodiment, the vibration of the vibrator 6, which is performing ultrasonic vibration that makes a unitary axial reciprocating motion, is transmitted to the cone 7, but in response to this axial vibration, the second
As shown in the figure, the die rod part 2/ of the vibrating die 2' also vibrates in the axial direction, and then the die joining part 2' is restrained in the axial direction by the wrinkle presser 1 on the die machining surface 2'-b. In -〇, the axial vibration is converted into radial vibration, so the die disc portion 2'-d vibrates in the radial direction, and the vibration is transmitted to the blank 5, causing the blank It also vibrates itself.

In this way, after the entire vibration system oscillates, the hydraulic pump 1
0 pressure oil is sent to press the wrinkle presser 1 to apply a predetermined pressure to the flange portion of the blank plate, and then the punch 4 is raised to perform deep drawing. The processing is completed by stopping the ultrasonic oscillation and closing the solenoid valve 11 in response to a command from the control unit 12 to release the wrinkle presser and then lowering the punch.

Table 1 shows the results of a comparative experiment between deep drawing with ultrasonic oscillation using a vibrating die that vibrates in the radial direction, and deep drawing without oscillation.

Table 1 (Material: Aluminum Plate Thickness: 50pm) As is clear from Table 1, when the drawing depth is 711II, forming is possible in both corner machining operations, but when no vibration is applied, wrinkles appear on the side of the workpiece. occurs, and the drawing depth is 1
In the case of 9 Dragons, molding was not possible when no vibration was applied, indicating that the molding limit was more than doubled.

Furthermore, since the vibrating die 2' according to the present invention described above is connected to the cone 7 supporting the vibrator 6 as a vibration generation source by a connecting bolt 8, the vibrating die can be detached and used for other processing. It is easy to replace the vibrating die with another vibrating die, that is, the device according to the present invention has versatility.

(Effects of the Invention) As described above, the present invention makes it possible to perform deep drawing by producing radial vibration in a vibrating die without any difficulty using only a single vibrator, and it is also possible to easily apply it to other vibrating dies. It is an invention that has great industrial value as it has the versatility to be replaced and used for other processing.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, with a longitudinal side view showing the main part with an operation circuit attached, and Fig. 2 is a longitudinal side view showing an enlarged view of the main part near the vibrating die from the previous time. FIG. 3 is a longitudinal sectional side view of the main part of a conventional deep drawing device that performs ultrasonic vibration. 1...Wrinkle presser, 2...Conventional vibrating die, 2'...
- Vibrating die according to the present invention 2/ -a...Dice rod portion, 2'-b...Dice processing surface, 2'-〇...Dice coupling portion, 21. 1...Dice disc part, 3...
Conventional vibrator, 4... Punch, 5... Raw plate, 6...
Vibrator according to the present invention, 7... Cone, 8... Connection bolt, 9... Ultrasonic generator, 10... Hydraulic pump, 11... Solenoid valve, 12... Control unit, 13
...Recorder, 14...Load cell, 15...Power supply. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) Add ultrasonic vibration that makes one-dimensional axial reciprocating motion in the direction orthogonal to the machined surface of the vibrating die, and convert this vibration into radial vibration that expands and contracts concentrically to the machined surface. A deep drawing method characterized by processing while converting. (2) A cone for transmitting vibrations is detachably connected to the rod portion of an annular vibrating die having a protruding die rod portion via a connecting bolt, and the cone is connected to an ultrasonic generator. A deep drawing machine characterized by being equipped with a vibrator that can be vibrated ultrasonically in the axial direction.