JPH03170226A - Composite pollshing machine - Google Patents

Abstract

PURPOSE: To reduce the polishing consumption of a diamond at the time of ultrasonic machining by connecting both electrodes at the output end of a pulse generating circuit to a vibrating rod and workpiece, respectively. CONSTITUTION: A vibrating rod 13 having the frequency resonant with an ultrasonic frequency applies ultrasonic machining to a workpiece 40. When a high-frequency pulse voltage is fed between the vibrating rod 13 and the workpiece 40 by a pulse generating circuit 400, sparks are generated between the vibrating rod 13 and the workpiece 40 by a shock, and electric machining is applied to the workpiece 40. The vibrating rod 13 intermittently contacts the workpiece 40, the output of the pulse voltage of the high-frequency pulse generating circuit 400 is stopped at the instant of contact, the pulse voltage is outputted when the vibrating rod 13 is separated from the workpiece 40, thereby the output consumption of the high-frequency pulse generating circuit 400 is reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a kind of polishing equipment, and particularly to a composite type (employing ultrasonic and electric machining simultaneously) lapping/boriner for die processing and repair. It is.

[Prior Art] Diamond is commonly used for dies for drawn metal wires, and conventionally ultrasonic or mechanical means have been employed for polishing this type of material.

[Problems to be Solved by the Invention] Such conventional techniques have the problems of low machining efficiency, large polishing wear of diamond during ultrasonic machining, and high machining costs.

[Means for Solving the Problems] The present invention was made for the purpose of solving such problems, and includes a machine body in which a vertical column is installed with an ultrasonic transducer having a vibration rod, and a vibration A support shaft provided below the rod to support the workpiece, a pressure adjustment mechanism connected to the support shaft, an ultrasonic generation circuit that generates ultrasonic waves for ultrasonic polishing, and It includes a pulse generation circuit having a pinwidth circuit and generating a pulse voltage, is provided with a clamp for clamping the workpiece, and both poles of the output end of the pulse generation circuit are connected to the vibration damper and the clamp, respectively.

In addition, the polishing machine has a pulse generating circuit that outputs a pulse voltage only when the vibrating rod and the workpiece do not come into contact with each other, and conversely, when the vibrating rod and the workpiece do not come into contact with each other, it does not output a pulse voltage. a waveform converter circuit that controls the pulse generation circuit, and a modulation circuit that has two input terminals, these input terminals are connected to the resonant circuit and the waveform converter circuit, respectively, and the output terminal is connected to the input terminal of the output amplifier circuit. and an input end of the waveform converter circuit is connected to an output end of the ultrasonic generation circuit.

The pressure adjustment mechanism consists of a guide case, two permanent magnets arranged coaxially and stacked inside the guide case, a support shaft fixedly connected to the permanent magnets, and a support shaft fixedly connected to the permanent magnets. It has a fixed ELEC I, RO, MAGNET 1, and the like.

The pressure regulating circuit for controlling the pressure regulating mechanism is composed of an amplifier and an input level adjusting device of the amplifier, and the electromagnet of the pressure regulating mechanism is used as a load of the amplifier.

[Operation] The present invention is characterized in that it simultaneously employs ultrasonic machining and electric machining means, and the principle is that a vibrating rod having a frequency that is the same as the vibration frequency of ultrasonic waves is used to perform ultrasonic machining on a workpiece. When a pulse voltage of three frequencies is passed between the vibrating rod and the workpiece (at this time, the vibrating rod also serves as an electrode), sparks are generated due to the shock between the vibrating rod and the workpiece, and the workpiece is Perform electrical processing on objects. The vibrating rod is intermittently in contact with the workpiece, and at the moment of contact, the high-frequency pulse generation circuit stops outputting the pulse voltage, and when the vibrating rod leaves the workpiece, it outputs the pulse voltage to generate high-frequency pulses. Reduces output consumption of the generating circuit.

[Example] An embodiment of the present invention will be described based on FIG.

The composite polishing machine in the embodiment of the present invention has a base (39)
and an outer shell (40), an ultrasonic transducer (12) attached to a vertical column (1) fixed to the base, and this ultrasonic transducer (12)
an electric device (41) having a polishing vibrating rod (13) installed in the holder and an ultrasonic generation circuit (250) shown in FIG.
Consisting of

The fuselage (90) includes an x, y movement mechanism, a rotation mechanism,
A localization mechanism, a swing mechanism, and a table (16) attached to the x, y movement mechanism are provided.

6 A pressure adjustment mechanism (49) is attached below the table (16), and a support member (]8) that supports the workpiece (46) extends from the pressure adjustment mechanism (49), and during machining, The support shaft (18) supports the workpiece so that it can contact the vibrating rod, and the pressure adjustment mechanism (49) adjusts the contact pressure between the workpiece (46) and the vibrating rod (13) by energy transfer of the support shaft. .

The ultrasonic generation circuit included in the electrical device (41) of the present invention in this embodiment is similar to that of the prior art. This circuit outputs a sine voltage to the ultrasonic transducer (12) so as to impart vibrational energy to a vibrating rod (13) provided on the ultrasonic transducer (12). As shown in Figure 2, this circuit has an ultrasonic source (1.00) and a connection (200) to the resonant network 1 work column, between which an ultrasonic transducer (12) is connected. are connected in series, and the resonance network (2 0 0) feeds back the output to the ultrasound source (1.00) to connect the ultrasound transducer (12) to the resonance network (2 0 0).
vibrate at a resonant frequency of 0). and an ultrasonic source (1.0
0) outputs a signal in phase with this resonance frequency to the waveform converter circuit (300).

In this embodiment, the main difference between the composite polishing machine of the present invention and a general ultrasonic polishing machine is that the electric device (41)
has a waveform converter circuit (300) and a pulse generation circuit (400).

One output end of the ultrasonic source (100) is connected to a waveform converter circuit (300) and this waveform converter circuit (
The output end of the pulse generating circuit (400) is connected to the input end of the pulse generating circuit (400), and both poles of the output end of this pulse generating circuit (400) are connected to the vibrating rod (13) and the workpiece (46) (via clamps). It's connected.

As shown in Fig. 3, the waveform converter circuit (300) consists of a resistor RI+4, a constant voltage diode D11, and a photocoupler D12, and this circuit receives a sine wave signal from an ultrasonic source (100). is received, and if this sine wave signal has a positive half cycle, it outputs a rectangular waveform signal, and if it has a negative half cycle, it outputs nothing.This rectangular wave signal is sent to the pulse generation circuit ( 400), this circuit (400) simply outputs a high frequency pulsed voltage in the presence of a square wave signal.

As shown in FIG. 4, the pulse generation circuit (400) includes a resonant circuit (401), a modulation circuit (402) having a modulated wave input terminal and a modulated wave input terminal, and an output amplification circuit (400).
3), the continuous pulse wave output from the resonant circuit (401) is supplied to the modulated wave input terminal of the modulation circuit (402), and the output of the waveform converter circuit (300) is used as the modulated wave to be used as the modulation circuit ( The modulating circuit (402) outputs a high frequency pulse only when the positive pulse of the modulated wave is input manually. In the present invention, the modulation circuit (4 0 2) may be a multiblier or may be a single amplifier whose output can be controlled to turn ON/OFF. The output of the modulating circuit (4 0 2) is fed to the input end of the power amplifier (403) to obtain an amplified output signal having the same waveform as the input waveform.

The vibrating rod (13) vertically reciprocates according to the frequency of the output signal of the ultrasonic generation circuit (250), and when the output signal is in a negative half-cycle state, the vibrating rod (13)
makes a downward movement, and in the case of a positive half cycle, makes an upward movement to break out of contact with the workpiece (46). At this time, the pulse generating circuit (400) outputs a high frequency pulse voltage to generate sparks due to shock between the vibrating rod (13) and the workpiece (46), thereby performing electrical machining. When the vibrating rod (13) moves downward and comes into contact with the workpiece,
The pulse generating circuit (400) stops outputting high frequency pulses, and electrical machining is stopped. As described above, in the composite machining of the present invention that simultaneously employs ultrasonic machining and electric machining, when the ultrasonic machining is actually performed, the electric machining can be stopped.

The true nature of the resonant circuit (40), the modulation circuit (402), and the output amplification circuit (403) in the pulse generation circuit (400) and the connection relationship between them are generally known in this technical field. Since this is knowledge, detailed explanation will be omitted.

One of the two poles at the output end of the 1 0 output J width circuit (4 0 3) is connected to the vibrating rod (13), and the other - is connected to the clamp (Fig. 6).
88) to the workpiece (46). As shown in FIG. 5(A), the clamp (88) is attached to the workpiece (
46) may be used as a ring (88A) that can be fitted into the ring. The ring (88A) is attached to the workpiece (46) by the bolt (89).
).

In addition, as shown in FIG. 5(B), a clamp (88
) to the spring clip (88B) and the king crop (4
6) It is also possible to support the outer wall. This is especially necessary for die processing. Workpiece with rubberized cloth (4
By blocking the hole on the back side of 6), it is possible to prevent the limb-shaped abrasive material (600) in the processing area of Figure 2 from flowing out.

In addition, the ultrasonic transducer (12) and the vertical column (1)
It is necessary to provide an insulating layer between the two, and as shown in FIG. 1, it can be an insulating plate or an insulating thin film (10). The insulation layer is an ultrasonic transducer (12)
Provided to insulate each part of the polishing machine.

As shown in Figure 6, the pressure reading machine +M (49) is an electromagnetic coil consisting of an electromagnetic coil (6]) and a core (62).
It has a magnet (67), a guide case (63), a support shaft (18), a bearing (65) that receives the support shaft, and permanent magnets (64) and (66). Permanent magnet (6
4) is fixed to the support shaft (18), and the other permanent magnet (66)
are located below the permanent magnet (64) with the same polarity, and these permanent magnets (64) and (66) are connected to the guide case (
63), and their outer diameter is the guide case (
63). Guide case (63)
is fixedly connected to the Elec l/mouth/magnet (67), and the bearing (65) is fixed inside the guide case (63).
The pressure. Harvesting machine ++l7 (4 9) is a table (
16) is identified below.

Since the permanent magnets (64) and (66) are placed facing each other, the support shaft (18) fixed to the permanent magnet (64) is given an upward supporting force in the linear direction by magnetic interaction. , Is this supporting force the workpiece? The pressure between the vibrating rod (13) and the workpiece (46) can be maintained by being transmitted to the object (46).

A pressure adjustment circuit (500) that controls the pressure adjustment mechanism (49)
) is a DC amplifier, a variable resistor R2■ for adjusting the input level of this DC amplifier, and a switch (S1) as shown in Fig. 7.
and the electromagnetic coil (61) of the electromagnetic coil (67) is used as the negative output of the DC amplifier.

Change the state of the switch (S1) or change the state of the reversible resistor (R2
. ) by adjusting the resistance value of the electromagnetic coil (61
) so that the pressure between the vibrating rod (13) and the workpiece (46) can be adjusted. When the vibrating rod (13) leaves the workpiece (46), the distance between them has a certain influence on the quality and effectiveness of machining, so this distance is compounded through the pressure regulating circuit (500). Control to reach the most effective state for mold processing.

The polishing machine of the present invention can be implemented using only ultrasonic processing means. At this time, the switch (S1) in this embodiment is turned off to increase the force between the vibrating rod (13) and the workpiece (46) to enhance the effectiveness of the ultrasonic machining.

In the embodiment of the present invention, the output signal frequency of the ultrasonic generating circuit (250) is 18~40KHz, and the output is 10~4KHz.
00W, the pulse period of the output signal of the pulse generation circuit (400) is 0.2 to 2 μs, and the frequency is 0.1 to 1.
5 MHz, peak current is 1-5. OA, peak voltage is 50-200V, vibrating rod (]3) and workpiece (46
) between the static pressure (at the start of machining, the workpiece (46) is placed under the vibrating rod (
13), but the pressure when the vibrating rod (13) has not yet started vibrating is 0.1 to 4 kg;
3) The discharge interval between the workpiece (46) (the distance the vibrating rod is separated from the workpiece due to vibration during machining) is 2 to 15 μm.
It is.

In addition, in the present invention, although the electrical machining is operated intermittently in the above-described embodiment, it may be operated continuously. In this case, there is no need to install a control (modulating) circuit part for high frequency pulses, i.e.
Waveform converter circuit] 4 circuit (3 0 0) and modulation circuit (4 0 2) are abbreviated,
The output end of the resonant circuit (401.) is an output amplifier (403).
Connect directly to the input end of the Although this embodiment simplifies the circuit structure, it has the disadvantage that the current increases during machining, resulting in increased output consumption.

[Effect of the invention] Compared with the conventional technology, the present invention has the following advantages.

The combined processing of electric processing and ultrasonic processing has the advantage that the processing efficiency can be increased by more than three times that of conventional processing.

Another advantage is that the pressure between the vibrating rod and the workpiece can be easily and accurately controlled by the pressure adjustment mechanism.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention; Fig. 2 is a block circuit diagram of an electric circuit of an embodiment of the invention; Fig. 3 is a waveform converter circuit diagram; Fig. 4 is a pulse generation circuit diagram; Figures 5 (A) and (B) show electricity passing through the workpiece.
5 is a perspective view showing an embodiment of the clamp, FIG. 6 is a sectional view of the main part of the pressure adjustment mechanism, and FIG. 7 is a pressure adjustment circuit diagram-C. 1... Vertical column 10... Insulating plate 12... Ultrasonic transducer-13...
Vibration rod 18... Support shaft 46... Workpiece 49... Pressure adjustment mechanism 63... Guide case 64, 66... Permanent magnet 67... Elec I/Mouth/Magnet 1/88...
・ Clamp 88A ... Metal ring 88B ... Spring clip 90 ...
Aircraft body 250 ... Ultrasonic generation circuit 300 ... Ultrasonic source 400 ... Pulse generation circuit] 6 401 402 403 500 Resonance circuit modulation circuit output amplifier pressure adjustment circuit

Claims (6)

[Claims] (1) A machine body in which a vertical column equipped with an ultrasonic transducer having a vibration rod is installed, a support shaft provided below the vibration rod to support a workpiece, and a pressure adjustment mechanism connected to this support shaft; It includes an ultrasonic generation circuit that generates ultrasonic waves for ultrasonic polishing, and a pulse generation circuit that has a resonance circuit and an output amplification circuit and generates a pulse voltage, and connects both poles of the output end of the pulse generation circuit to a vibrating rod. A composite polishing machine characterized by being connected to the workpiece. (2) The composite polishing machine outputs a pulse voltage only when the vibrating rod and the workpiece are not in contact with the pulse generating circuit,
Conversely, it has a waveform converter circuit that controls the pulse generation circuit so as not to output pulse voltage when the vibrating rod and the workpiece come into contact, and two input terminals, and these input terminals are connected to the resonance circuit and the waveform converter circuit. and a modulation circuit connected to the circuit, the output end of which is connected to the input end of the output amplification circuit, and the input end of the waveform converter circuit is connected to the output end of the ultrasonic source. range (
The composite polishing machine described in 1). (3) The pressure adjustment mechanism includes a guide case and two permanent magnets stacked inside the guide case and placed coaxially with the same polarity facing each other.A support shaft is fixed to one of the permanent magnets, and the magnetism of the permanent magnet is strengthened. 2. The composite polishing machine according to claim 2, further comprising an electro-magnet fixed below the guide case to allow the polishing to occur. (4) The pressure regulating circuit for controlling the pressure regulating mechanism includes an amplifier and an input end voltage regulating device of the amplifier, and the electromagnet of the pressure regulating mechanism is used as a load of the amplifier. The compound polishing machine described in scope (3). (5) The composite polishing machine according to claim (2), (3), or (4), further comprising an insulating plate for insulation between the ultrasonic transducer and the vertical column. (6) The pulse generating circuit passes its output voltage to the workpiece through a clamp, which clamp is a spring clip surrounding the workpiece or a metal ring that fits over the workpiece and is secured to the workpiece by a bolt. The composite polishing machine according to claim (1) or (5), characterized in that: