JPH0423626B2 - - Google Patents

Description

[Detailed description of the invention] purpose of invention (Technical field) This invention relates to an ultrasonic processing machine.

(Prior art) Conventionally, when using an ultrasonic processing machine, the time during which ultrasonic vibration is actually applied to the workpiece (applying time) is set in advance before processing is performed. There is.

When setting the ultrasonic application time, it is necessary to perform a machining test in advance using a switch different from the activation and switch for starting one machining cycle, and measure the application time required to obtain the optimal machining. It was hot.

(Problems to be Solved by the Invention) However, in this ultrasonic processing machine, the measurement of the ultrasonic application time was carried out using a stop watch or by the operator's intuition.

Therefore, when a stop watch is used, the testing operation of the ultrasonic processing machine and the time measurement operation must be performed at the same time, which is extremely troublesome and does not allow accurate time measurement.
Furthermore, if one were to do it by intuition, it would not be possible to measure time more accurately.

This invention automatically measures the time during which ultrasonic waves are applied during machining tests, and displays the ultrasonic application time, thereby saving the time and effort of measuring the time and improving the machining process. To provide an ultrasonic processing machine that can accurately determine the ultrasonic application time required for processing.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a method in which a machining horn that is relatively reciprocated toward the workpiece is brought into contact with the workpiece. In an ultrasonic processing machine in which a processing horn is dissociated relative to a workpiece after processing is performed by applying ultrasonic waves for a time set by a timer means in the state, the timer means and a test means for applying ultrasonic vibration to the processing horn while the processing horn is in contact with the workpiece, regardless of the
The gist thereof is an ultrasonic processing machine provided with a display device for displaying the results of the test by the test means over time, and a setting means for presetting the test results in the timer means.

(Function) Ultrasonic vibrations are applied to the machining horn while the machining horn is in contact with the workpiece, regardless of the timer means which sets the ultrasonic application time during machining by the test means. On the other hand, the display device displays the result of the test by the test means, that is, the time for which the ultrasonic waves were applied. The setting means may be configured to preset the test result into the timer means as the ultrasonic application time during processing.

(Embodiment) A preferred embodiment embodying the present invention will be described below with reference to the drawings.

In Figure 1, the bed 1 has a support post 2 on its rear side.
is erected, and a frame 3 is supported by the pillar 2. A jig 4 is provided on the bed 1, and workpieces 5 and 6 made of plastic material are placed on the jig 4. An air cylinder 7 as a reciprocating drive means is mounted and fixed on the upper side of the frame 3. The piston rod 7a of the air cylinder 7 is reciprocated in the vertical direction by the switching operation of the electromagnetic switching valve 8.

The movable body 9 is connected and fixed to the piston rod 7a, and is reciprocated in the vertical direction by the piston rod 7a. The machining horn 10 has its collar supported by the movable body 9, and has a vibrator 11 coupled to its upper end. Then, by moving the piston rod 7a of the air cylinder 7 downward, the machining horn 10 is brought into contact with the workpieces 5 and 6, and the vibrator 11 causes the machining horn 10 to vibrate ultrasonically. 5 and 6 are subjected to ultrasonic processing.

A pressure sensing switch 12 is attached to the air cylinder 7 and detects whether or not the machining horn 10 has come into contact with the workpieces 5 and 6. The pressure sensing switch 12 activates the piston rod 7 when the pressure inside the air cylinder 7 reaches a preset pressure, that is, when the machining horn 10 comes into contact with the workpieces 5 and 6.
When the load applied to a increases and the pressure inside the air cylinder 7 increases, a detection signal SG3 of positive potential (hereinafter referred to as H level) is output.

As shown in FIG. 2, two start switches 13a and 13b are provided on the front surface of the bed 1.
The operation of one machining cycle is started by turning on both of these two switches 13a and 13b. A pressure switch 15, an ultrasonic generation switch 16 as a test means, and an application time setting switch 17 are provided on the lower front side of the cover 14.

The holding time setting dial 18 is provided above the application time setting switch 17, and is used to control the workpiece 5 after the application of ultrasonic waves is completed in one processing cycle.
Set the time to hold 6 pressed. A test time display device 19 serving as a display device is provided above the holding time setting dial 18, and displays the ultrasonic application time in test machining. The application time display device 20 provided above the test time display device 19 displays the ultrasonic application time during one actual machining cycle determined by the test machining.

Next, the electric circuit of the ultrasonic processing machine configured as described above will be explained.

In FIG. 3, the latch circuit 21 outputs an H-level forward movement signal SG1 to the valve drive circuit 23 via an inverter 22 in response to an ON signal based on the ON operation of the start switches 13a and 13b.
The valve drive circuit 23 is a circuit that switches and controls the electromagnetic switching valve 8, and operates the piston rod 7a of the air cylinder 7 in response to the forward movement signal SG1.
That is, the electromagnetic switching valve 8 is controlled to move the processing horn 10 downward (forward movement) and to move the processing horn 10 upward (backward movement) in response to a backward movement signal SG8, which will be described later.

Further, the valve drive circuit 23 is connected to the pressure switch 1.
The machining horn 10 is moved forward in response to the forward movement signal outputted via the inverter 24 based on the ON operation of 5, and the return signal outputted via the one shot circuit 25 and inverters 26 and 24 based on the OFF operation. The machining horn 10 is moved back in response to the motion signal.

The one-pulse generating circuit 27 is a circuit that outputs one pulse signal SG2 in response to an ON signal based on the operation of the start switches 13a and 13b via an OR circuit 28, and is a circuit that outputs one pulse signal SG2 via an OR circuit 28, and is a circuit that outputs one pulse signal SG2 through an OR circuit 28. Output to 29.

Forward signal SG at H level of the latch circuit 21
1 is output to the AND circuit 31 via the OR circuit 30. The detection signal SG3 from the pressure sensing switch 12 is input to the AND circuit 31, and the detection signal is
When SG3 becomes H level, an H level drive control signal SG4 for driving the vibrator 11 is generated.
Output.

The AND circuit 32 inputs the drive signal SG4 as well as a clock signal SG5 of a predetermined period from the reference clock generator 33. A clock signal SG5 is outputted to the counter 29 at the next stage from the time when sonic processing is started.

The counter 29 clears its contents in response to the pulse signal SG2 from the one-pulse generating circuit 27, and counts the clock signal SG5. Therefore, the counter contents are the oscillator 11
The ultrasonic wave application time of the machining horn 10 is as follows. The contents of the counter are then displayed on the test time display device 19.

Further, the H level ultrasonic application signal SG6 based on the ON operation of the ultrasonic generation switch 16 is outputted to the one pulse generation circuit 27 and the AND circuit 31 via the inverter 34. In this case as well, the vibrator 11 and the counter 29 operate based on the ultrasonic wave imparting signal SG6, as described above.

The application time setter 35 as a timer means sets the counter 29 in response to the ON operation of the application time set switch 17 via an inverter 36.
The content of is preset as the ultrasonic application time in one machining cycle. The grant time is displayed on the grant time display device 20.

The comparator 37 inputs the ultrasound application time set by the application time setting device 35 and the contents of the counter 29, and compares both data. Then, when the ultrasonic machining time during actual ultrasonic machining becomes the same as the time set by the application time setting device 35, the comparator 37 outputs a machining end signal SG7, and the vibrator 1
1 to stop driving.

Further, the processing end signal SG7 is output as a clear signal to the latch circuit 21, and the latch circuit 21
The state of the above-mentioned H level forward signal is
Disappear SG1.

The timer 38 controls the workpiece 5,
Time data for pressurizing and holding 6 and the processing end signal
Enter SG7. Then, the timer 38 inputs the machining end signal SG7 and starts the timer operation, and outputs the backward movement signal SG8 to the valve drive circuit 23 when the pressurization holding time has elapsed. Then, the valve drive circuit 23 controls the electromagnetic switching valve 8 to move the piston rod 7a of the air cylinder 7 back in response to this backward movement signal SG8.

Next, the operation of the ultrasonic processing machine configured as described above will be explained.

Now, when the machining switch 15 is turned on to perform test machining to set the ultrasonic application time, the valve drive circuit 23 switches the electromagnetic switching valve 8 in response to the on signal from the switch 15, and turns the air cylinder 7 on. It is driven to move the machining horn 10 forward toward the workpieces 5 and 6. Processing horn 1
0 comes into contact with the workpieces 5 and 6, the pressure sensing switch 12 outputs an H level detection signal SG3.

When the ultrasonic generation switch 16 is turned on while the processing horn 10 is in contact with the workpieces 5 and 6, an ultrasonic wave application signal SG6 is output to the one-pulse generation circuit 27 and the AND circuit 31. The one-pulse generating circuit 17 outputs one pulse signal SG2 to the counter 29 in response to this application signal SG6, and clears the contents of the counter.

On the other hand, the AND circuit 31 outputs the drive control signal SG4 to the vibrator 11 to drive the vibrator 11, and also outputs it to the AND circuit 32 at the next stage to output the clock signal SG5 of the reference clock generator 33 to the counter 29. Output to .

Therefore, the machining horn 10 starts the test ultrasonic machining, and the counter 29 receives the clock signal.
The ultrasound application time is counted based on SG5. At this time, the contents of the counter 29 are displayed on the test time display device 19.

Next, when the ultrasonic generating switch 16 is turned off to stop applying ultrasonic waves, the ultrasonic wave applying signal SG6 at the H level disappears and becomes zero potential (hereinafter referred to as L level). By this, AND circuit 3
H level drive control signal output from 1
SG4 becomes L level, the vibrator 11 stops driving, and the AND circuit 32 at the next stage cuts off the output of the clock signal SG5 to the counter 29, causing the counter 29 to stop counting.

Therefore, the counter 29 ends its counting operation at the same time as the ultrasonic wave application by the transducer 11 stops, and the content of the count becomes the time during which the ultrasonic wave was applied by the transducer 11. Since the application time is displayed on the test time display device 19, the operator can immediately confirm the ultrasonic application time in the test process.

Next, when the operator turns on the application time set switch 17, in response to this ON operation, the application time setting device 35 reads and stores the contents of the counter 29, that is, the ultrasonic application time, and also displays the application time display device 20. to be displayed.

After setting the ultrasonic application time, when the pressure switch 15 is turned off, the one shot circuit 25 and the inverter 2 are turned off based on the off operation.
The valve drive circuit 23 causes the machining horn 10 to move backward in response to the backward movement signal outputted through the valves 6 and 24. Then, when the machining horn 10 moves forward to the uppermost position, the test machining for setting the ultrasonic application time ends.

Next, based on the ultrasonic application time set above,
The case where a machining cycle is performed will be explained.

Now, when the start switches 13a and 13b are operated, the latch circuit 21 activates the forward movement signal SG1 at the H level.
is outputted to the valve drive circuit 23 and also outputted to the 1-pulse generation circuit 27 and the AND circuit 31. The valve drive circuit 23 switches the electromagnetic switching valve 8 in response to the forward movement signal SG1, drives the air cylinder 7, and moves the machining horn 10 to the workpiece 5,
Move towards 6.

On the other hand, the 1-pulse generating circuit 27 generates this forward motion signal.
A pulse signal SG2 is sent to the counter 29 in response to SG1.
Outputs and clears the count contents. Furthermore, since the machining horn 10 is not yet in contact with the workpieces 5 and 6 and the H level detection signal SG3 is not output from the pressure sensing switch 12, the AND circuit 31 outputs an H level drive control signal. SG4
is not output.

Eventually, when the machining horn 10 comes into contact with the workpieces 5 and 6, the pressure sensing switch 12 outputs an H level detection signal SG3, and the AND circuit 3
1 outputs the drive control signal SG4 at H level.

In response to this drive signal SG4, the vibrator 11 is driven and the machining horn 10 starts ultrasonic machining of the workpieces 5 and 6. Meanwhile, at the same time, the counter 29 counts the clock signal SG5 output from the AND circuit 32 at the next stage.

When the ultrasonic processing progresses and the comparator 37 determines based on the contents of the counter 29 that the ultrasonic application time set by the application time setting device 35 has been reached, the comparator 35 vibrates the processing end signal SG7. output to the child 11, latch circuit 21, and timer 38. The vibrator 11 stops driving based on this machining end signal SG7. On the other hand, the latch circuit 21
is set to the initial state. Further, the timer 38 starts its timer operation in response to this processing end signal SG7.

Then, the process moves to a step of holding the workpieces 5 and 6 under pressure. When the timer 38 reaches the holding time set by the holding time setting dial 18, the timer 38 outputs a return signal SG8 to the valve drive circuit 23.
In response to the backward movement signal SG8, the valve drive circuit 16 switches the electromagnetic switching valve 8 to cause the machining horn 10 to move backward.

When the machining horn 10 reaches the uppermost position, the ultrasonic machining machine completes one machining cycle and operates the next start switches 13a and 13b.

In this way, in this embodiment, during test processing to set the ultrasonic application time to be applied from the time when the processing horn 10 contacts the workpieces 5 and 6, the time is automatically measured and Since the test time is displayed on the test time display device 19 and set in the application time setting device 35, it is possible to save the trouble of measuring the ultrasonic application time and to accurately determine the ultrasonic application time necessary for processing. I can do it.

Note that the present invention is not limited to the above-described embodiment; for example, in the embodiment described above, the application time setting switch 17 may be operated to set the contents of the counter 29 as the ultrasonic application time in the application time setting device 35. However, when the pressure switch 1
5 or in response to the off operation of the ultrasonic generation switch 16, the content of the counter 29 is set by the time setting device 35.
It may also be implemented by setting it to .

Effects of the Invention As described above, according to the present invention, when performing a processing test for setting the ultrasonic application time, the ultrasonic application time can be automatically measured and set, and the ultrasonic application time can be automatically measured and set. This display has an excellent effect in that it is possible to save time and effort for ultrasonic time measurement and to accurately determine the ultrasonic application time required for processing.

[Brief explanation of drawings]

Fig. 1 is a side view of an ultrasonic processing machine embodying this invention, Fig. 2 is a front view of the same ultrasonic processing machine,
FIG. 3 is an electrical block circuit diagram of the ultrasonic processing machine. In the figure, 5 and 6 are workpieces, 7 is an air cylinder,
8 is an electromagnetic switching valve, 9 is a movable body, 10 is a processing horn, 11 is a vibrator, 12 is a pressure sensing switch, 13a, 13b are starting switches, 15 is a pressure switch, 16 is an ultrasonic generation switch, 17 is a Application time set switch, 19 test time display device, 23 valve drive circuit, 27 1 pulse generation circuit, 29 counter, 31, 32 AND circuit, 35 application time setter, 37 comparator, 38
is a timer.

Claims (1)

[Claims] 1. The time set by the timer means 35 while the machining horn 10, which is relatively reciprocated toward the workpieces 5 and 6, is in contact with the workpieces 5 and 6. In an ultrasonic processing machine in which the machining horn 10 is dissociated relative to the workpieces 5 and 6 after the machining is performed by applying ultrasonic waves, the timer means 35 is not involved. A test means 16 for applying ultrasonic vibration to the machining horn 10 while the machining horn 10 is in contact with the workpieces 5 and 6; and a time display for displaying the results of the test by the test means 16. An ultrasonic machining machine characterized by comprising: a display device 19; and setting means 17, 29 for presetting the test results in the timer means 35.