JPS6294242A - Balance adjusting device - Google Patents

Abstract

PURPOSE:To enable automatic adjustment of balance and improve operation efficiency by controlling a driving mechanism in such a way that a vibration becomes minimum by means of a signal from a vibration detector provided in a rotary member, and adjusting the rotation of a 1movable balance weight. CONSTITUTION:A wheel flange vibrates greatly due to unbalanced grinding wheel, and the vibration is detected by a detector 51 and amplified, and is inputted via a filter 57 and an A/V converter 59, into a comparator 61 as an A input, and as a B input via a circuit 63. When A>B, a reverse rotation signal is given to an FF 65, which outputs a signal R. A circuit 69 modulates the output signals of the FF 65, 67, together with the specified signals M1, M2 of micromotors 37, 37 and gives them to a transmitter 71, which transmits the signals to a circuit 79. The signals are amplified by the circuit 79 and demodulated by a demodulator 75, and a circuit 77 takes out motor rotation signals FRS together with the signals M1, M2 and gives these signals to the circuit 79. Then, as the circuit 79 rotates the motor 37 in response to the control signals from the circuit 77, a movable balance weight 35 rotates, and stops in a position where a vibration signal is the minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a device for adjusting the mounting balance of a rotating worker such as a grindstone turning tool or jack.

[Technical direction of the invention; H and its problems] In recent years, the machining accuracy required for machine tools has become more and more precise, and parts that require precision have become 1/10 to 1/1 of the conventional level.
Accuracy as high as 100 is now required. In order to satisfy these requirements, the main parts of a machine tool, such as the rotating spindle, the slide that moves the tool or workpiece in a straight line, and their drive system, must be assembled and manufactured with great care. Furthermore, since the machined surface created by a machine tool is one in which the relative motion between the cutting tool and the workpiece is imprinted on the machined surface, in order to achieve the above-mentioned precision, the rotating body must be well balanced and the machine It is necessary to cover it to prevent vibration from occurring.

In response to these needs, we applied a conventional vibration detector,
A balance indicating device is known that indicates the amount of unbalance of a rotating member and its five quotients. In order to balance the mounting of a machine tool using such a balance indicating device row, the operator must adjust the balance top according to the balance instructions of the balance indicating device, read the instructions of the balance indicating device again, and repeat this several times. The balance adjustment is completed when the vibration decreases after repeated steps. For this reason, there have been problems in that in order to obtain a machined surface with higher precision, the operator must be highly skilled and must work for a long time.

[Objective of the Invention 1] The present invention has been made in view of the above-mentioned conventional problems, and provides a movable balance weight for balance adjustment in a rotating member such as a grindstone flange, a turning tool boulder, or a turning chuck. An object of the present invention is to provide a balance adjustment device which automatically adjusts the balance so that the vibration of the movable balance weight is minimized by driving the movable balance weight with a signal from a vibration detector. .

[Structure 1 of the invention] The present invention is provided in a tool section J5 of a work robber, and a movable balance way 1 for balance adjustment is provided in a rotating member, and a drive mechanism for this movable balance weight is provided,
A vibration detector is provided on the rotating member, and an adjusting drive device controls the drive mechanism to adjust the rotation of the movable balance weight so that the vibration is at a minimum of 4 f based on the signal from the vibration detector. The gist of the invention is a balance adjusting device.

[Embodiments of the Invention] FIG. 1 shows the entire surface grinding machine 1, which is equipped with a numerically controlled ill Vt device. This surface grinding
11 is equipped with a table 7 that horizontally reciprocates from side to side as shown in FIG. A dressing device 15 is provided on the top.

On the base 5, there is an L and L dollar 17 that supports the table 7 so as to be movable horizontally in the depth direction in FIG. A handle 21 for moving the table 7 from side to side is provided at the top.

Furthermore, a handle 2 that moves the processing head 11 up and down
3 is the setting. Furthermore, this surface grinding machine 1 is provided with an operation box 25 and a grinding oil circulation device 27, and in addition to automatic surface grinding by the numerical control device 3, the handle 19
．． Manual grinding can be carried out by operations 21.23.

In such a surface grinder 1, the rotary grindstone 13 requires delicate balance adjustment when performing precise surface grinding. FIGS. 2 and 3 show an embodiment of a balance adjustment device for the rotary grindstone 13 in the grinding machine 1. FIG. A rotary grindstone 13 serving as a machine tool is attached to a grindstone flange 31 attached to a grindstone shaft 29.

Inside the grindstone flange 31 as a rotating PIS material, two pairs of fixed balance weights 33 and movable balance weights 35 are provided facing each other at approximately 180° symmetrical positions. For each movable balance weight 35, a micro Tanabata 37 is provided near it, and there are four tarpaulins, three reworms from the micro Tanabata 37, and an A-me wheel 41. Warm 43. The movable balance weight 35 can be rotationally driven via the arm wheel 45.

Furthermore, an electronic circuit printed board 47 is provided on the grindstone flange 31, and controls two micromotors 37, 37.

On the other hand, a vibration detector 51 is attached to the housing 49 of the two grindstone shafts, and has a function of transmitting a signal of detected vibration.

The receiving and amplifying electronic circuits installed on the electronic circuit printed board 47 and the signal transmitting circuit installed on the vibration detector 51 have circuit configurations shown in FIGS. 4 and 5, respectively. It is. As shown in FIG.
1 includes a vibration detection section 53 that converts the vibration of the housing 49 into an electrical signal, an amplification section 55 that amplifies this signal, a filter 57, and an A10 converter 59. Zaraniko A/
A part of the outputs of the five D converters) j is given to the eight inputs of the comparator 61 without any time delay, and the other part is given to the eight inputs of the comparator 61 through the Ut circuit 63.

When the 6 input is larger than the B input in the comparator 61, an inversion command signal for the micromotor 37 is given to the flip-flop circuit (F, F, >65.
The inverted output of 5 is connected to the second flip-flop circuit (F, F,
) 67 as an inverting input. First and second F, F.

A forward rotation command signal is always input to the inputs 65 and 67. The outputs of F, F, and 65.67 are input to the signal generation circuit 69 as a forward rotation signal and a reverse rotation signal R1 stop signal @S. The signal generation circuit 69 receives motor designation signals M1 and M2 signals indicating which of the two micromotors 37, 37 is to be driven. The output of this signal generation circuit 69 is input as a modulation signal to the transmitter 71, from which it is sent along with the motor designation signal for forward rotation and reverse rotation.
A command signal for 1 stop S is transmitted.

The stop signal S from the second F, F, 67 is also used as a balancing completion signal and is input to a lamp or other appropriate notification means.

The electronic circuit board 47 for controlling the rotation of the microphone motor 37.37 has the circuit configuration shown in FIG.
, the signal from the vibration detector 51 is amplified by an amplifier 73, demodulated by a demodulator 75, and a signal separation circuit 77
The signal is separated into a motor designation signal 9 and a motor rotation command signal, and applied to the motor i and lJ m circuits 79, respectively, to control the drive of the micro motors 37 and 37.

The operation of the balance adjustment device having the above configuration will be explained next. By starting the device, the grindstone shaft 29 of the rotary grindstone 13 is rotated. In this case, if the rotating whetstone 13 is unbalanced, the whetstone 7 flange 31 vibrates greatly together with the whetstone shaft 29, and the vibration is detected by the vibration detector "a51." The vibration is detected by the section 53, amplified by the amplification section 55, filter 57, and A/D.
It is applied to the comparator 61 as six inputs via the converter 59, and is applied to the comparator 61 as the B input via the delay circuit 63.

In comparison PJ61, the vibration signal human power B that has passed through the delay circuit 63 is compared with the vibration signal of the delay time Tyi that is directly input from the A/D converter 59 when it arrives. Therefore, if the movable balance weight 35.35 rotates during this delay time T and the balance state changes, the 6th input and the B input will not match. In other words,
When the movable balance weight 35 is rotated by the rotational drive of the micromotor 37, the balance of the rotary grindstone 13 changes slightly, and the vibrations of the grindstone shaft 29 and the housing 49 also change. And movable balance way;・350
If the balance condition worsens due to rotation, the vibration will increase, and the six inputs will become larger than the eight inputs during the delay time T, and it will be necessary to reverse the micromotor 37 in order to maintain balance. Therefore, in the comparator 61, A>
In the case of 8, a reversal command is given to F, F, 65, F, F,
65 outputs an inverted signal R.

On the other hand, if the balance becomes better as the movable balance weight 35 rotates, the vibration becomes smaller as time becomes slower.

Therefore, during the delay time T, 6 inputs have a smaller value than 8 inputs. Therefore, in this case, there is no need to reverse the driving micromotor 37, and it is sufficient to continue the rotation. Therefore, F, F.

65 is not given an inversion signal and is kept in the state in which it outputs the original forward rotation signal F or reverse rotation signal I.

In this way, the signal generation circuit 69 generates the micro Tanabata 37.37
F along with the designated signals M1 signal and M2 signal.

The output signal of F, 65.67 is modulated and given to the transmitter 71, and the transmitter 71 emits a signal to the receiving section of the motor control circuit.

The motor control circuit section provided on the electronic circuit board 1-board 47 receives the signal from the transmitter 71, amplifies it with the amplifier 73, demodulates the signal with the demodulator 75, and converts the signal with the signal separation circuit 77. - data specification signal 0M1 signal,
Along with the M2 signal, motor rotation signals F, R, and S are taken out and applied to the motor 1 control circuit 79.

In response to the motor rotation command signal from the signal separation circuit 77, the motor control circuit 79 drives the motor on the designated side of the micro Tanabata 37° 37 in a designated direction or stops it.

In this way, the micro motors 37, 37 are driven by the transmission and reception of signals by the electronic circuit, and the operation of the movable balance weights 35, 35 due to the drive of the micro motors 37, 37 will be described next.

As shown in FIGS. 2 and 3, the micro heater 37
When the micro Tanabata 37 rotates, the movable balance weight 35 matches the rotational direction of the micro Tanabata 37 via the worms 39 and 43 and the four-wheels 41 and 45, and rotates c. When the movable balance weight 35 rotates in this manner, the position of its center of gravity changes, so the center of rotation of the entire rotating system also changes slightly, increasing or decreasing the vibration caused by the rotation of the rotary grindstone 13. When the balance is well maintained, the vibration of the rotary grindstone 13 decreases, and as it leaves the well-balanced state, the vibration increases.

Therefore, to determine whether the optimum balance state is reached, rotate the movable balance ways h35 and 35 individually and check the state of the vibration signal from the vibration detector 51. 1 + i in the opposite direction, and stop the rotation of the movable balance weight 35 at the position where the vibration (3) from the vibration fJJ detector 51 is minimum. Determine the minimum position 13 Then repeat this operation several times, rotate either of the two movable weight balances 35.35, and if the vibration becomes too large for C, either the situation is bad or the balance is not optimal. I can judge that there was, and the balance is somehow completed.

FIGS. 7 and 8 show another embodiment of the invention, and show an embodiment applied to a milling machine. The tool holder 83 is removed from the rotating shaft 81 of the milling machine 4
It is sharp and tool 85 is used for this machine V1 small tool 83.
is fixed. For such milling machines,
Balance weight 89 fixed 180° symmetrically in storage section 87 of tool holder 83 17J balance weight 9
1 are provided in two pairs facing each other. A micro motor 93 is provided for each movable balance way 91, and the output of the second micro motor 93 is connected to the worm 91.
5. Worm wheel 97. A movable balance weight 91 is rotatably connected via a 99° worm wheel 101 to the worm. Therefore, similarly to the first embodiment, the vibration generated when the second tool holder 83 rotates together with the rotating shaft 81 is adjusted to be minimized by the rotation of the movable balance weight 91, thereby achieving a rotationally balanced state. It becomes possible.

[Effect of the invention] This invention provides a movable balance weight within a rotating member,
In addition, since a vibration detector for the rotating member is installed, the machine tool can be automatically balanced by detecting the vibration of the rotating member and driving the movable balance weight to reduce the vibration. can. Therefore, unlike in the past, the operator does not have to manually read the instructions from the balance instruction device and move the balance piece (J+ to balance the machine tool; instead, the balance of the machine tool can be adjusted automatically). Kotogusa, 9+” has the advantage of being able to easily adjust the balance in 4 hours.

[Brief explanation of drawings]

FIG. 1 shows a plane 1iIt used in an embodiment of the present invention.
A front view of the cutting machine, FIG. 2 is a front view of an embodiment of the present invention,
Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2, Fig. 4 is a circuit block diagram of the vibration detector of the above embodiment, Fig. 5 is a block diagram of the motor control circuit, and Fig. 6 is a block diagram of the vibration detector of the above embodiment. 7 is a front view of another embodiment, and FIG. 8 is a cross-sectional view taken along the line ■--■ in FIG. 7. 13... Rotating grindstone 29... Grinding wheel shaft 31...
Grinding wheel flange 33...Fixed balance weight 35...Movable balance weight 37...Micro motor 39.43...Worm 41.45...Arm wheel 47...Electronic circuit printed board 49... - Grinding wheel shaft housing 51... Vibration detector representative Patent attorney Yasuo Miyoshi ``Reference 1'' ゛・I・-) 4] Figure 5 Figure 2 Figure 3 Figure 6 (a) Balance Figure 6 (b) Balance Figure 7 Figure 8 Procedure Nehosho-cho, (Voluntary) December 13, 1985 Commissioner of the Patent Office Uga) Kuchibe Tono 1, Indication of matter fl Patent application 1988 -234548 No. 2, Title of the invention
Relationship between the balance adjustment device 3 and the person making the correction f1 Patent applicant address (residence) Rui Kanagawa (-J + 200 Ishida, Sehara City Name) AMADA Co., Ltd. Representative Ten 11 Mitsuru Mei 4, Agent Address 112-3, Toranomon, Minato-ku, Tokyo 105 @ 5th floor, Toranomon Building Telephone: Tokyo (504) 3075-3076-3077
Number Name Patent Attorney (6834) Yasuo Miyoshi 1. -n゛]. 5.7□. ItK! '″″′Rig (1
) Specification (2) Drawing 2...! 6. Contents of amendment (1) The scope of claims is amended as shown in the attached sheet. (2) Among the drawings, Figure 4 will be amended as shown in the attached sheet. (3) Mei 41H page 12, line 2 [This invention...
3rd line from ``... related to the device. The sentences up to `` have been amended as follows. [This invention relates to balance adjustment for adjusting the mounting balance of a mounting portion for mounting a rotating grindstone, a turning tool, a workpiece, or the like. (4) On page 4 of the specification, line 1, ``In the tool attachment part of the machine tool,'' is corrected to ``In the workpiece or tool attachment part of the machine tool.'' (5) Line 10, page 7 of the specification. ``Forward rotation signal'' and [
, J, and insert f'FJ between them. (6) Specification page 7, line 16] “Forward rotation” and “,”
Insert rFJ between. (7) Line 10 of page 8 of the specification: “...”
Insert the following sentence between and [by activating the device...]. [As shown in f1100(a), press ■ to start this balance adjustment device in forward rotation, and if the vibration fIJ is large, rotate it to reverse with ■ to reduce the vibration, and if the vibration seems to increase further. If so, press ■ to reverse it to reduce the vibration, and then, if the vibration becomes large, press ■ to reverse it. Repeat the above operations (1) and (2) two to three times to achieve balance at the minimum point. Regarding Figure 6(b),
Balancing is carried out in a similar manner as in figure (a). Roughly in detail, ``Claims (1) In the workpiece or second negative attachment part of a machine tool, a movable balance weight for balance adjustment is provided in the rotating member, and a drive mechanism for this movable balance weight is provided, A vibration detector is provided on the rotating member, and an adjusting drive device is provided for adjusting the rotation of the movable balance way i by controlling the drive mechanism so that vibration is minimized by a signal from the vibration detector. A balance adjustment device characterized in that the tool has a rotating part (a part of the tool that rotates).
The balance adjustment device according to claim 1, characterized in that it is used for: (3) The balance adjusting device according to claim 1, wherein the tool mounting portion is for mounting by a turning worker.

Claims (3)

[Claims] (1) In the tool mounting part of a machine tool, a movable balance weight for balance adjustment is provided in a rotating member, a drive mechanism for this movable balance weight is provided, a vibration detector is provided in the rotating member, and a vibration detector is connected to the rotary member. A balance adjustment device comprising: an adjustment drive device that adjusts the rotation of a movable balance weight by controlling the drive mechanism so that vibration is minimized in response to a signal. (2) The balance adjusting device according to claim 1, wherein the tool mounting portion is for mounting a rotating grindstone. (3) The balance adjustment device according to claim 1, wherein the worker mounting portion is for mounting by a turning worker.