JPH11151638A - Machining vibration automatic detection system and machining vibration automatic detection control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of automatically obtaining an optimum finished surface in machining a work piece even when no operator wathes a NC machine. SOLUTION: When a workpiece 2 is to be machined with the workpiece 2 fixed by jigs 4a and 4b while let a head 1 abut against the workpiece 2, the vibration of the workpiece 2 is detected by vibration detection device 11. An abnormal vibration value transmitter 15 judges the kind of vibration of the work piece 2 based on a vibration signal so as to allow it to be transmitted. The rotation speed adjustment value and moving speed adjustment value of a tool, which correspond to the kind of vibration, are transmitted by a vibration value receiver 17, and it is so designed that the rotation speed and moving speed of the head 1 are automatically controlled by the use of the rotation sped adjustment value and moving speed adjustment value of the head 1 from the vibration value receiver 17 by means of a NC operation pendant 18 in place of an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of a rotational speed and a moving speed of a tool according to a vibration value of a workpiece when the workpiece is machined by the tool.

[0002]

2. Description of the Related Art Generally, a milling apparatus mounts a milling cutter on a head and processes a surface of a workpiece while rotating the milling cutter.

For example, a head 1 as shown in FIG.
In a milling apparatus for processing the surface of the workpiece 2 by controlling it three-dimensionally, the workpiece 2 is placed on a table 3 and tightened by jigs 4a, 4b, 4c,. The workpiece 2 is fixed to the table 3 with a jig 4). The workpiece 2 is a product in which a plurality of parts are combined as shown in FIG. 14, for example.

When the workpiece 2 is fixed to the table 3 by the jig 4, the operator manually tightens and fixes the jig 4.

Next, the operator operates a spindle overwrite button (not shown), a feed overwrite button (not shown), etc. of the NC operation pendant 5 of the milling device to rotate the head 1 and the speed of the stand 6. After setting, etc., milling is started.

During the milling, the workpiece 2 is constantly vibrating due to the rotation of the head 1, the movement of the apparatus, and the vibration of the jig 4 and the like. If the above adjustment is not adjusted to the optimum value, As shown in FIG. 15, the work surface of the workpiece 2 has severe chatter. For this reason, the operator
While observing the processing surface of the workpiece 2, the spindle overwrite button (not shown), the feed overwrite button (not shown), etc. are set based on empirical values so as to minimize chatter vibration disturbance on this surface. I was adjusting.

[0007]

However, when machining a workpiece with a milling device, the operator adjusts the spindle overwrite button, feed overwrite button, etc. of the NC operation pendant while always observing the condition of the machining surface. Therefore, it is necessary to maintain an optimum head rotation speed, feed speed, and the like so that the processing surface has an optimum finish, and thus the operator is restrained during the processing.

The adjustment of the spindle overwrite and the feed overwrite button is an adjustment value based on the experience of the operator, and therefore, cannot be set to an optimum adjustment value unless a skilled operator.

Further, since the empirical adjustment value differs depending on the operator, the finish on the processing surface of the workpiece also differs.

Therefore, without restraining the operator,
It is desirable that the finish of the processed surface of the workpiece is always optimal.

[0011]

According to a first aspect of the present invention, there is provided an automatic machining vibration detecting system for machining a workpiece while fixing the workpiece with a jig and bringing a tool into contact with the workpiece. This is a processing vibration automatic detection system used in a system that performs processing.

The vibration detecting device detects the vibration of the workpiece. The vibration value transmitter inputs the vibration from the vibration detection device,
The type of vibration of the workpiece is determined from the level of the vibration signal and a preset vibration value, and the determined type of vibration is transmitted as a vibration type signal.

Further, the machining vibration automatic detection system according to the second invention is used in a system for machining a workpiece while fixing the workpiece with a jig and bringing a tool into contact with the workpiece. Processing vibration automatic detection system.

In this system, a sound collecting microphone detects a vibration sound on a processing surface of a workpiece, and a vibration value abnormality notifying device alerts immediately when a sound collecting level from the sound collecting microphone exceeds a reference level. Occurs.

Further, the machining vibration automatic detection and control system rotates the tool at an input rotation speed while fixing the workpiece to the table with a jig and bringing the tool into contact with the workpiece. In a processing system that moves at an input moving speed, a vibration detection device detects vibration of a workpiece. A vibration value transmitter receives the vibration from the vibration detection device, determines the vibration type of the workpiece from the level of the vibration signal and a preset vibration value, and transmits the vibration type signal of the determined type. .

The vibration value receiver receives a vibration type signal from the vibration value transmitter, and sends out a tool rotation speed adjustment value and a tool movement speed adjustment value corresponding to the vibration type.

The NC device includes a tool rotation speed adjustment switch that adjusts and sets the rotation speed of the tool when operated, and a tool movement speed adjustment switch that adjusts and sets the movement speed of the tool when operated. Enter the tool rotation speed adjustment value and the tool movement speed adjustment value from the vibration value receiver, and when these adjustment values are input, these adjustment values are given priority and the tool is adjusted to its rotation speed adjustment value. And control based on the moving speed adjustment value.

[0018]

<First Embodiment> FIG. 1 is a schematic configuration diagram of a machining vibration automatic detection control system according to a first embodiment. Processing vibration automatic detection control system 10 shown in FIG.
Is a vibration detecting device 11 attached to the jig 4 for detecting and transmitting the vibration of the workpiece 2 (also referred to as a material) itself.
, Vibration value abnormality transmitter 15, vibration value receiver 17, N
C operation pendant 18.

The abnormal vibration value transmitter 15 includes the vibration detecting device 1.
1 is connected by a wired cable 12 and receives a material vibration signal from the vibration detecting device 11. When the material vibration signal exceeds a predetermined allowable value, the vibration abnormal signal is transmitted by radio waves.
The abnormal vibration value transmitter 15 is activated by operating the power-on switch 14.

The above-mentioned abnormal vibration signal is a generic name of abnormal vibration signals A and B indicating forced chatter vibration, abnormal vibration signal C indicating self-excited chatter signal C, and the like.

The vibration value receiver 17 is a vibration value abnormality transmitter 1.
5, a spindle override adjustment value Ep for adjusting the optimum rotation speed of the head 1 based on the type of the vibration abnormality signal, and a feed override adjustment value for adjusting the moving speed of the stand 6. N in search of Qp
The code is converted into a code conforming to the control format of the C device and transmitted to the NC operation pendant 18 via the cable 16.

The NC operation pendant 18 is turned on when the system on switch 19 is turned on, and at the same time, supplies a predetermined power to the vibration value receiver 17 to turn it on.

The NC operation pendant 18 includes a spindle override adjustment value Ep and a feed override adjustment value Qp from the vibration value receiver 17 or a spindle override adjustment value Ei and a feed speed adjustment rotary switch from a spindle speed adjustment rotary switch described later. , The feed override adjustment values Qi from the head 1 and the head 1 based on these adjustment values.
And the moving speed of the stand 6 are controlled.

<Detailed Configuration> FIG. 2 is a detailed configuration diagram of the vibration detection device 11 and the vibration value abnormality transmitter 15. As shown in FIG. 2, the vibration detecting device 11 includes a vibration sensor unit 20 and a sensor mounting jig 21, and the head 24 of the plunger 23 of the vibration sensor unit 20 is brought into contact with the surface of the material 2 by the sensor mounting jig 21. Is attached to a sensor material fixing jig 4k.

The aforementioned vibration sensor unit 20 is shown in FIGS.
As shown in FIG. 7, a cylindrical piezoelectric element 26 is housed in a cylindrical tube 27 having an open top, and a cylindrical plunger 23 is provided on the upper surface of the piezoelectric element 26 accommodated in the cylindrical tube 27. It is covered with. The bias power applied to the piezoelectric element 26 is supplied from the vibration value abnormality transmitter 15. A plurality of springs 29 are provided on the bottom of the cylindrical tube 27.
a, 29b,... 29f are provided around one end. Also,
The cylindrical tube 28 is provided with a set bolt hole 30, and a set screw 31 is sealed in the bolt hole 30.

The spring 29 of the vibration sensor 20
The other ends of a, 29b,... 29n are provided around the bottom plate 33 of the sensor mounting jig 21.

A vibration insulating material 35 is adhered to the entire surface of the sensor mounting jig 21 on the back side of the side plate 34, and a permanent magnet 36 is adhered to the vibration insulating material 35.

That is, the vibration detecting device 11 includes the head 2
The permanent magnet 36 of the sensor attachment jig 21 can be attached to the jig 4 so that the jig 4 contacts the surface of the material 2. At the time of this mounting, the plunger 23 is pushed toward the bottom plate 33 of the sensor mounting jig 21 but the spring 29
The plunger 23 is pushed from below by the spring force of a, 29b,... 29fn. For this reason, the head 24 of the plunger 23 is completely in contact with the surface of the material 4. Further, the set screw 31 is adjusted to fix the plunger 23 so that the contact can be maintained.

Therefore, even if the material 2 is vibrated, the vibration of the jig 4 is not transmitted to the piezoelectric element side by the vibration insulating material 35, and the vibration of the material 2 is faithfully transmitted to the piezoelectric element 26 via the plunger 23. Convey.

On the other hand, the vibration value abnormality transmitter 15 includes an amplifier 38 for amplifying a vibration signal from the vibration detection device 11 and a filter for extracting vibration of only the material from the vibration signal from the amplifier 38 (hereinafter referred to as a material vibration signal). 39, an A / D converter 40 for digitally converting the material vibration signal, a vibration type determination unit 41 for determining the type of the material vibration signal, and a transmission for transmitting the type of vibration determined by the vibration type determination unit 41 by radio waves. And a power supply unit 43 that supplies power to each unit of the transmitter 15 and supplies power to the piezoelectric sensor 26.

The power supply unit 43 may be composed of a battery or a solar battery, or may receive a commercial AC power supply, generate a predetermined DC power supply from this power supply, and supply it to each unit.

The above-described vibration type determination unit 41 is provided with a determination unit 4
5, a memory 46, and transmission control means 47.

The memory 46 stores a record of vibration frequency, vibration acceleration, vibration amplitude and chatter type for each chatter type.

The judging means 45 decodes the vibration frequency, vibration acceleration, and vibration amplitude from the material vibration data from the A / D converter 40, and determines which record in the memory 46 corresponds to the decoding result.

For example, if it is determined that the record is the first record, it is determined that the chatter is the forced chatter A.
It is determined that the chatter is the forced chatter B, and if it is determined that the record is 3, the chatter is the self-excited chatter C.

The transmission control means 47 includes a vibration type determining unit 41
Is transmitted to the transmitter 42 by combining the type of chatter and the ID of the receiver.

The transmitter 42 determines the type of chatter and the ID of the receiver at the frequency and timing based on the regulations of the low power radio equipment.
And send.

Next, the configuration of the vibration value receiver 17 will be described. FIG. 5 is a schematic configuration diagram of the vibration value receiver. The vibration value receiver 17 shown in FIG. 5 includes a chatter type signal (forced chatter A signal, forced chatter B signal,
A receiver 50 for receiving the self-excited chatter signal C) and a chatter type signal from the receiver 50 are converted to A /
The D converter 51 and the vibration type table 54a of the memory 54 decode the chatter type data from the A / D converter 51, and obtain the adjustment values (Ep, Q
p) to the code changing means 55. This main body control value determining means 53
Sends a spindle override adjustment value Ep and a feed override adjustment value Qp according to the type of chatter signal. Further, when the forced chatter signal B is input, the main body control value determining means 53 generates an alarm.

As shown in FIG. 5, the memory 54 stores the main shaft override control value, the main shaft rotation speed, the feed override control value, the feed speed, and the like in the forced chatter signals A and B and the self-excited chatter signal C. The corresponding vibration type table 54a is stored.

The code conversion means 55 converts the spindle override adjustment value Ep and the feed override adjustment value Qp determined by the main body control value determination means 53 into a control code format (for example, a BCD code) on the NC device side to perform NC operation. Send it to the pendant 18.

Next, the configuration of the NC operation pendant 18 according to the present invention will be described with reference to FIG. As shown in FIG. 6, the NC operation pendant 18 includes a spindle speed adjusting rotary switch 21 and a feed speed adjusting rotary switch 22.
And a machine speed adjustment controller 56 and the like.

When the spindle speed adjusting rotary switch 21 is operated, the spindle override adjustment value Ei (rotation speed of the head 1) corresponding to the rotation amount is signal line 57 when operated.
To the machine speed adjustment controller 56 via the.

When operated, the feed speed adjusting rotary switch 22 sends a feed speed override adjustment value Qi (movement speed of the stand 6) corresponding to the rotation amount to the machine speed adjustment controller 56 via the signal line 58. I do.

A signal line 59 for transmitting the spindle override adjustment value Ep of the vibration value receiver 17 is connected to the signal line 57, and a signal for transmitting the speed override adjustment value Qp of the vibration value receiver 17 to the signal line 58. Line 60 is connected.

The machine speed adjustment controller 56 receives the spindle override adjustment value Ei or Ep via the signal line 57, generates a head rotation speed control signal corresponding to either of the adjustment values, and generates a head drive unit (not shown). ) To rotate the head 1 at the rotation speed.

The machine speed adjusting controller 56
Sets the speed override adjustment value Qi or Qi to a signal line 58.
And generates a stand moving speed control signal corresponding to any of the adjustment values to generate a stand driving unit (not shown).
Is used to move the stand 6 at that speed.

The operation of the processing vibration automatic detection control system configured as described above will be described below.

For example, the workpiece 2 shown in FIG. 14 is fixed to the table 3 of the milling device with a jig 4k, and the vibration detecting device 11 is attached to the jig 4k as shown in FIG. Then, when the power-on switch 14 and the system-on switch 19 of the NC operation pendant 18 of the vibration value abnormality transmitter 15 are operated, the vibration value abnormality transmitter 15 and the vibration value receiver 17 are activated.

Then, for example, an operator operates the spindle speed adjusting rotary switch 21 and the feed speed adjusting rotary switch 22 of the NC operation pendant 18 to set the spindle override and the feed override to appropriate adjustment values.

The head 1 of the milling device rotates at the rotation speed set by the operator, and the stand 6 processes the workpiece 2 while moving the rail at the speed set by the operator.

At this time, since the vibration detecting device 11 is attached to the jig 4 k so that the head 24 of the plunger 23 is in contact with the bottom surface of the workpiece 2, the plunger 23 follows the vibration of the workpiece 2. Vibrates. This vibration is detected by the piezoelectric element 26 of the vibration detecting device 11 and sent to the vibration value abnormality transmitter 15 as a material vibration signal.

The vibration type judging section 4 of the vibration value abnormality transmitter 15
1 converts the material vibration signal into an amplifier 38, a filter 39,
The input is performed via the A / D converter 40, and the processing described below is performed.

FIG. 7 is a flow chart for explaining the operation of the vibration type determination section 41 of the vibration value abnormality transmitter 15. The determination unit 45 reads the material vibration data from the vibration value abnormality transmitter 15 in the vibration type determination unit 41 (S1), and analyzes the vibration frequency, the vibration acceleration, the vibration piece width, and the like from the material vibration data (S2).

Then, the set value table 46 of the memory 46
a is read, and a record corresponding to the analyzed vibration frequency, vibration acceleration, and vibration piece width is allocated (S3). For example, from the analysis result of the material vibration data, the vibration frequency is “24”, the vibration acceleration is “0.833”, and the vibration piece amplitude is “34.7”.
Is determined, it is determined that the chatter is A. Further, when it is determined from the analysis result of the material vibration data that the vibration frequency is “24”, the vibration acceleration is “1.89”, and the vibration piece amplitude is “90.8”, it is determined that forced chatter B occurs.

Further, when it is determined from the analysis result of the material vibration data that the vibration frequency is “24”, the vibration acceleration is “0.513”, and the vibration piece amplitude is “22.6”, it is determined that the self-excited chatter C occurs. .

Next, the chatter type of this record is read,
The chatter type is determined (S4), and the determined chatter type is transmitted by radio waves via the transmission control means 47 and the transmitter 42 (S5). Next, it is determined whether or not the processing is completed (the power is turned off) (S6).
Return to

That is, the vibration value abnormality transmitter 15 and the vibration detecting device 11 attach the vibration of the workpiece 2 to the jig 4k when the stand 6 is moved while rotating the head 1 of the milling device. The detected vibration is detected by the vibration detecting device 11, the type of the vibration is determined according to the detected vibration level of the workpiece, and the vibration is transmitted by radio waves.

On the other hand, the vibration value receiver 17 receives the vibration type signal from the vibration value abnormality transmitter 15 with the receiver 45, and
The main body control value determination means 53 receives an input via the / D converter 46.

The main body control value determination means 53 determines the adjustment value of the rotational speed of the head 1 and the adjustment value of the moving speed of the stand 6 by performing the processing described below. FIG. 8 is a flowchart for explaining the operation of the main body control value determining means of the vibration value receiver.

The main body control value determining means 53 includes a receiver 50,
The chatter type data from the vibration value abnormality transmitter 15 is read via the A / D converter 51 (S10), and the chatter type is determined (S11). For example, it is determined whether the vibration state of the workpiece 2 due to the processing is a forced chatter A, a forced chatter B, or a self-excited chatter C.

If it is determined in step S11 that the chatter is the forced chatter A, the machining control value table 54a of the memory 54
, The spindle override is 10% down and the feed override is 10
It is determined to increase by% (S12). Next, a spindle override adjustment value Epa for reducing the spindle override by 10% is generated (S13), and a feed override adjustment value Qpa for increasing the feed override by 10% is generated (S14).

The spindle override adjustment value Ep
a and the override adjustment value Qpa
5 to the NC operation pendant 18 (S1).
5).

Next, it is determined whether or not the processing is completed (S16).
If not, the process returns to step S10.

That is, when it is determined that the chatter is the forced chatter A, the rotational speed of the head is automatically reduced by 10% and the moving speed of the stand 6 is increased by 10%.

When it is determined in step S11 that the chatter is the forced chatter B, the spindle override adjustment value Ep is determined.
(P; pa or pb) and the override adjustment value Qp
(P; pa or pb) are respectively set to 0%, and adjustment values Ep (p; pe) and Qp (p; pe) are generated (S1).
7). Then, the alarm sound or the alarm is immediately turned on (S18), the process returns to step S15, and the adjustment values Ep (p; pe) and Qp (p; pe) are sent to the NC operation pendant 18.

That is, when it is determined that the vibration of the workpiece 2 is the forced chatter B, the rotation of the head 1 and the movement of the stand 6 are stopped to notify the worker of the stop.

Further, when it is determined in step S11 that the self-excited chatter is C, the spindle override is increased by 10% from the information of the record of the self-excited chatter C by referring to the machining control value table 54a of the memory 54, and the feed override is performed. Is determined to be reduced by 10% (S19). next,
A spindle override adjustment value Epb for increasing the spindle override by 10% is generated (S20), and a feed override adjustment value Qpb for decreasing the feed override by 10% is generated (S21), and the process proceeds to step S15. And the spindle override adjustment value Epb,
The override adjustment value Qpb is transmitted to the NC operation pendant 18 via the code conversion means 50.

That is, when it is determined that the chatter is the self-excited chatter C, the rotational speed of the head is automatically increased by 10%, and the moving speed of the stand 6 is automatically decreased by 10%.

On the other hand, the NC operation pendant 18 is connected to the signal line 5 connected to the spindle speed adjusting rotary switch 21.
7 and the spindle override adjustment value Ep of the vibration value receiver 17
And a signal line 58 connected to the feed speed adjusting rotary switch 22 and a signal line 60 transmitting a speed override adjustment value Qp of the vibration value receiver 17 are connected.

For this reason, the spindle override adjustment value Epa sent from the vibration value receiver 17 for reducing the spindle override by 10% and the feed override by 10%
Feed override adjustment value Qpa or spindle override adjustment value Epb and override adjustment value Q
pb or adjustment values Epe and Qpe, each of which is 0%
Is automatically sent to the machine speed adjustment controller 56 of the NC operation pendant 18, and the rotation speed of the head 1 and the moving speed of the stand 6 are automatically adjusted.

Therefore, the vibration detecting device 11 is attached to the jig 4 for fixing the workpiece 2 to be connected to the vibration value abnormal transmitter 15, and the vibration value receiver 17 and the NC operation pendant 18
After the initial setting is completed by the worker by simply connecting the cable, even if the workpiece 2 is vibrating, an appropriate head rotation speed that automatically suppresses the vibration amount and continues the processing,
Processing proceeds at the speed of the stand. For this reason, the machined surface automatically becomes a surface with less chatter as shown in FIG. 9 without the operator adjusting any rotary switch.

<Second Embodiment> FIG. 10 is a schematic configuration diagram of a vibration abnormality notification system according to a second embodiment. The vibration abnormality notification system 65 according to the second embodiment shown in FIG. 10 includes a vibration sound collection microphone 66 and a vibration value abnormality notification device 67.

As shown in FIG. 11, the vibration sound collecting microphone 66 is provided with a horn 67 made of a diaphragm, a movable coil, a control material, a magnet, and the like, and the horn 67 is covered with a housing 68. The porcelain circuit is provided around the housing 68.

As shown in FIG. 12, the vibration value abnormality notification device 67 inverts and amplifies the vibration sound signal from the vibration sound collection microphone 66, and rectifies the vibration sound signal from the inversion amplification circuit 70. Rectifier circuit 71 and rectifier circuit 7
A comparator circuit 72 for comparing the vibration sound signal from the reference signal 1 with a reference value and sending out an output signal, an output signal from the comparator circuit 72 being input, amplifying the output signal and providing a desired signal to the coil section 74 of the speaker section 73 And a Darlington circuit section 75 for passing the current.

Further, the inverting amplifier circuit 70 inputs a vibration sound signal from the vibration sound collecting microphone 66 via a filter 70a for extracting only the processing sound generated on the processing surface. Further, the comparator circuit 72 is provided with a reference sound signal generation circuit 72a for sending out an output signal from the comparator circuit when the vibration sound has a predetermined level abnormality.

Such a vibration abnormality notification system 65 includes:
As shown in FIG. 10, the vibration sound collecting microphone 66 is arranged at a position where the vibration sound generated during processing is collected most efficiently. In addition, the vibration value abnormality notification device 67 may be provided at a work site, but in the present embodiment, is disposed in a worker waiting room or the like.

When the workpiece 2 is machined by operating the NC operation pendant 5, the vibration sound collecting microphone 66 outputs a milling device (sound of rotation of the head on the machined surface, sound of the speed of the stand moving) during machining. Is collected and sent to the vibration value abnormality reporting device 67.

The vibration value abnormality notification device 67 receives the vibration sound signal from the vibration sound collection microphone 66, amplifies the signal in the inverting amplifier circuit 70, and sends the amplified signal to the comparator circuit 72 via the rectifier circuit 71. The comparator circuit 72 compares this vibration sound signal with the reference sound signal of the reference sound signal generation circuit 72a,
When the vibration sound signal is higher than the reference sound signal, the comparator output is sent to the Darlington circuit unit 75 to generate an alarm sound from the speaker.

Therefore, even if the worker is in the work waiting room, the state of the processing can be understood, and only when an alarm sound is generated, N
It is only necessary to adjust each rotary switch of the C operation pendant 18.

Note that such a vibration sound collecting microphone 66
, A system consisting of an inverting amplifier circuit 70 and a rectifier circuit 71, and a vibration value receiver 17 (however, the receiver 50 is unnecessary). May be adjusted.

[0081]

According to the machining vibration automatic detection system of the first aspect of the present invention, the workpiece is machined while the workpiece is fixed with a jig and the tool is brought into contact with the workpiece. When
The vibration of the workpiece is automatically detected.

Then, the transmitter determines the type of vibration of the workpiece from the level of the vibration signal and a preset vibration value, and transmits the determined type of vibration as a vibration type signal.

Therefore, by reading the level of the vibration type signal, the operator can easily determine what the current rotational speed and moving speed of the tool should be.

Further, according to the processing vibration automatic detection system of the second invention, the sound pickup microphone detects the vibration sound on the processing surface of the workpiece, and the vibration value abnormality reporting device detects the sound pickup level from the sound pickup microphone. Is above the reference level,
Alert immediately.

Therefore, the effect is obtained that the worker can grasp the processing status at a remote place without always checking the processing status of the machine.

Further, according to the machining vibration automatic detection control system, when the workpiece is machined while the workpiece is fixed with a jig and the tool is brought into contact with the workpiece, the machining Automatically detects vibration of objects.

Then, the transmitter determines the type of vibration of the workpiece based on the level of the vibration signal and a preset vibration value, and transmits it. The vibration type signal is input to the vibration value receiver, and the tool rotation speed adjustment value and the tool movement speed adjustment value corresponding to the vibration type are transmitted. Then, the NC device uses the tool rotation speed adjustment value and the tool movement speed adjustment value from the vibration value receiver instead of the adjustment values from the tool rotation speed adjustment switch and the tool movement speed adjustment switch. And to control automatically.

Therefore, the effect that the processing surface of the workpiece is optimally machined even when the worker is not always on the NC side is obtained.

Further, since the rotational speed and the moving speed of the tool are automatically adjusted by the adjustment value corresponding to the vibration value, the effect that the machining can be continued even by an inexperienced worker. Have been obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a processing vibration automatic detection control system according to a first embodiment.

FIG. 2 is a schematic configuration diagram of a vibration value abnormality transmitter.

FIG. 3 is a three-dimensional view of the vibration detection device.

FIG. 4 is a cross-sectional view of the vibration detection device.

FIG. 5 is a schematic configuration diagram of a vibration value receiver.

FIG. 6 is a schematic configuration diagram of an NC operation pendant.

FIG. 7 is a flowchart illustrating an operation of the vibration value abnormality transmitter.

FIG. 8 is a flowchart illustrating an operation of the vibration value receiver.

FIG. 9 is an explanatory diagram illustrating an effect of the processing vibration automatic detection control system according to the first embodiment.

FIG. 10 is a schematic configuration diagram of a machining vibration abnormality notification system according to a second embodiment.

FIG. 11 is a configuration diagram of a sound collecting microphone.

FIG. 12 is a schematic configuration diagram of a second embodiment.

FIG. 13 is an explanatory diagram illustrating a conventional milling process.

FIG. 14 is an external view of a workpiece.

FIG. 15 is an explanatory view for explaining chatter vibration of a conventional machined surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Workpiece 4 Jig 10 Processing vibration automatic detection control system 11 Vibration detection device 15 Vibration value abnormality transmitter 17 Vibration value receiver 18 NC operation pendant

Claims (6)

[Claims] 1. A processing vibration automatic detection system used in a system for processing a workpiece while fixing the workpiece with a jig and bringing a tool into contact with the workpiece. A vibration detection device that detects the vibration of the workpiece, and receives the vibration from the vibration detection device, and determines the type of vibration of the workpiece from the level of the vibration signal and a preset vibration value. An automatic processing vibration detection system including a vibration value transmitter that transmits a determined type of vibration as a vibration type signal. 2. The vibration detection device according to claim 1, wherein the vibration detection device includes: a piezoelectric sensor unit;
A mounting portion, wherein the piezoelectric sensor section has a plunger having a predetermined length; and a piezoelectric sensor section configured to be capable of standing upright on the upper surface of the plunger and transmitting a vibration signal according to the vibration of the plunger; One side is fixed to the lower surface of the piezoelectric sensor portion, and a spring member is provided around the lower surface. The mounting portion is a flat plate that fixes the other end of each spring member and vertically attaches each spring member. 2. The automatic processing vibration detection system according to claim 1, further comprising a fixing portion having a portion, wherein said flat portion is fixedly attached to said jig. 3. An automatic processing vibration detection system used in a system for processing a workpiece while fixing the workpiece with a jig and bringing a tool into contact with the workpiece. A sound collecting microphone that detects vibration sound on the processing surface of the workpiece, and a vibration value abnormality notification device that immediately generates an alarm when the sound collecting level from the sound collecting microphone exceeds a reference level. Automatic processing vibration detection system. 4. A tool is fixed to a table with a jig, and the tool is rotated at an input rotation speed while the tool is in contact with the workpiece, and the tool is moved at a moving speed at which the tool is input. In the processing system to be moved, a vibration detection device that detects vibration of the workpiece, a vibration from the vibration detection device is input, and a level of the vibration signal and a preset vibration value are used to determine the vibration of the workpiece. Vibration type is determined, a vibration value transmitter for transmitting a vibration type signal of the determined type and a vibration type signal from the vibration value transmitter are received, and a rotational speed adjustment value of the tool corresponding to the vibration type is provided. A vibration value receiver for transmitting a tool movement speed adjustment value, a tool rotation speed adjustment switch for adjusting and setting the rotation speed of the tool when operated, and a movement speed of the tool when operated. A tool movement speed adjustment switch for adjusting and setting the degree, and inputting a tool rotation speed adjustment value and a tool movement speed adjustment value from the vibration value receiver, and when these adjustment values are input, these adjustments are performed. An NC device that receives the value with priority and controls the tool based on the rotation speed adjustment value and the movement speed adjustment value thereof. 5. The vibration value receiver, comprising: a first rotation speed adjustment value that reduces the rotation speed of the tool by about 10% from a current rotation speed according to a type of the vibration type signal; A first rotation speed adjustment value for increasing the speed by about 10% from the current rotation speed, or a second rotation speed adjustment for increasing the rotation speed of the tool by about 10% from the current rotation speed. Any one of a second set of values and a second moving speed adjustment value for lowering the moving speed of the tool by about 10% from the current moving speed is sent to the NC device. An automatic processing vibration detection control system according to claim 4. 6. The NC device according to claim 3, wherein said vibration value receiver further comprises a third rotation speed adjustment value and a third movement speed adjustment value for stopping rotation and movement of said tool, respectively, depending on said vibration type signal. The processing vibration automatic detection control system according to claim 4 or 5, wherein the control signal is transmitted to the control device.