JPS61132813A - Balance detecting display device of rotating body - Google Patents

Abstract

PURPOSE:To utilize effectively a device by placing a light reflection type origin detector so as to be opposed to a rotary area of a light reflecting body attached to the surface of a rotating body, calculating a deflection quantity corresponding to plural dividing positions from a vibration detecting value of the rotating body, and displaying the maximum or minimum dividing position of a vibration. CONSTITUTION:A work W is held on a table 29 provided on a frame 26 of a grinding machine, a grindstone 28 is fixed to the tip of a supporting shaft which can be rotated by a motor 30 and positioned at the upper part of the work W, and an orgin detecting sensor1 is placed at a position opposed to a rotary area of the grindstone 28 by a stand 31. Also, a light reflecting plate 6 is stuck in front of the grindstone 28, also a piezoelectric type acceleration pickup 2 is adsorbed to the upper part of the frame 26, each output of a sensor 1 and a pickup 2 is led to a control part contained in0 an indicator 3, and based on the origin in the rotating direction shown by the light reflecting body 6, as a reference, a deflection quantity corresponding to plural dividing positions is calculated, and the dividing position in which a vibration is maximum or minimum is displayed on a display body 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a rotational balance detection and display device for a rotating body such as a machine tool.

(Prior Art) Conventionally, this type of rotational balance detection and display device has been installed one by one in a machine having a rotating body, so it is costly to provide it in a large number of machine tools. Further, when a balance detection indicator is later attached to a machine tool, it is difficult to attach it due to the complicated structure of the detector and space constraints.

(Problems to be Solved by the Invention) This invention provides a balance detection device that is separate from a machine equipped with a rotating body, and is installed in the machine only when detecting balance, thereby making the balance detection device effective. The purpose is to encourage the use of the information.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a light reflector attached to the surface of the rotating body and indicating the origin of the rotational direction of the rotating body, and a light reflector in the rotation area of the light reflector. A light reflection type origin detector that is arranged to face each other and detects the light reflector, a vibration detector that detects the vibration of the rotating body, and a plurality of index positions corresponding to the origin based on the vibration. It is constructed of a control means that calculates the amount of vibration, and a display that displays at least the indexed position where the vibration is maximum or minimum based on the action of the control means.

(Function) A shake amount detector attached to a part of the machine base detects vibration of the machine base, and the shake amount data is inputted to the control means. Then, the light reflection type origin detector detects the light reflector attached to the rotating body, and based on the origin signal outputted thereby, the amount of runout for each indexed position is calculated by the control means. Means determines the runout condition of the rotating body, and the condition is displayed by the indicator.

(Example) An example embodying the present invention will be described based on the drawings.

As shown in FIG. 1, the balance detection indicator 35° is connected to an origin detection sensor 1 that detects the origin of the rotary grindstone 4, which will be described later.
, an acceleration pickup 2 equipped with a permanent magnet (not shown), which is attracted to a part of the machine base 5 by the permanent magnet and detects vibrations of the machine base 5 as the grinding wheel 4 rotates, and the two detectors 1 and 2. It consists of a box-shaped display 3 that displays the balance state of the rotating body based on data.

The origin detection sensor 1 is a light reflection type sensor, and therefore a light reflection plate 6 is removably attached to the front surface of the rotating body 4.

The acceleration pickup 2 is of a piezoelectric type that outputs an electric charge according to the vibration of the machine base.

The front surface of the display 3 is a display section 7, and a grip section 8 for lifting the display 3 is provided on the top surface. Further, a power switch 9 for starting the display 3 is provided on the right side.

On the display section 7, index position indicators 15 are arranged in an annular manner to indicate index positions for every 10 degrees of rotation angle of the rotating body 4,
Each indexing position indicator 15 has a built-in red light emitting diode. Further, an origin indicator 1 with a built-in light emitting diode is located below the position corresponding to the index position indicator 15 of the origin position from which the origin detection sensor 1 outputs a signal.
2 is placed. A runout amount indicator 16 for numerically displaying the maximum or minimum runout amount of the rotating body 4 is provided within the ring of the index position indicator 15.
A maximum shake amount mode indicator 13 and a minimum shake amount mode indicator 14 are provided within the ring so as to be located below the origin indicator 12, respectively. Furthermore, the shake amount display 16
A hold display body 22 is provided below. Each of these display bodies 13, 14 and 22 has a built-in light emitting diode.

Further, a mode changeover switch 11 for selecting the maximum shake amount display mode or the minimum shake amount display mode is provided on the upper left side of the display section 7, and the mode changeover switch 11 is set to the maximum or minimum shake amount display body 13. Turn on one of 14.

A hold switch 10 for creating a display holding state is provided on the upper right side of the display section 7, and when the hold switch 10 is pressed and turned on, the hold display body 22 is lit. Further, the origin indicator 12 starts to light up at the same time as the hold switch 10 is turned on, and lights up as the rotating body 4 passes the origin position. Further, a tuning sensitivity adjustment knob 32, a phase adjustment knob 33, and a center frequency adjustment knob 34 are provided on the lower right side, and the adjustment switch SW1
, SW2 are provided on the lower left side.

Next, the electric circuit built into the display 3 will be explained based on the block diagram shown in FIG.

A central processing unit (hereinafter referred to as CPU) 18 is an arithmetic control unit that displays the balance state of the rotation body 4, and includes a read-only memory (hereinafter referred to as ROM) 20. A random access memory (hereinafter referred to as RAM) 21 is connected, a ROM 22 stores programs, and a RAM 23 is provided with a data area for storing runout amount data. The CPU 18 also has an origin/point detection sensor 1.0 as an input device via an input/output interface 19. Hold switch 10. Mode selection switch 112 Phase adjustment knob 33. Adjustment switch S
WI, SW2. A piezoelectric acceleration pickup 2 is connected via a filter circuit 17, and as an output device,
Index position indicator 15° Origin indicator 12. Runout amount indicator 16. Maximum runout amount mode indicator 13. A minimum shake amount mode display 14 and a hold display 22 are connected.

The filter circuit 17 shown in FIG.
1. Voltage amplification circuit 42 that adjusts vibration sensitivity using variable resistor R1. A band pass filter (B, P) that adjusts the peak value of vibration by a center frequency adjustment knob 32 that changes the variable resistor R2.

F,)46. Integrating circuit 47 for converting acceleration signal SGI into speed signal SG2. A voltage amplification circuit 48ρ that adjusts the amplification factor of the speed signal SG2 by the sensitivity adjustment knob 32 is connected in this order. The speed signal SG2 output from this filter circuit 17 is converted into a digital signal by an A/D converter 25.

Now, a case where the balance detection and display device configured as described above is installed in a surface grinding machine will be described.

First, the installation state of the balance detection and display device and the main parts of the machine stand 5 will be explained based on FIG. 3. A table 29 for holding a workpiece W is provided on the frame 26 of the grinding machine. A rotary grindstone 28 is fixed to the table 29 so as to be rotatably attached to the tip of the support shaft 27 and to face the workpiece W on the table 29 from above. A motor 30 for driving the support shaft 27 is arranged behind the support shaft 27. Note that here, the frame 26 refers to all parts except the part rotated by the motor 30.

The piezoelectric acceleration pickup 2 is attracted to the upper column 26a of the frame 26 by a magnet. Further, the origin detection sensor 1 is arranged using a stand 31 at a position facing the rotation range of the grinding wheel 28, and
A light reflecting plate 6 for detecting the origin is adhered to the front surface of the sensor 8.

In the drawings, the balance indicator 3 is particularly drawn in a large size for easy understanding.

Next, the operation will be explained according to the flowchart shown in FIG. The program in this flowchart proceeds under the control of the CPU 18.

In the state described above, the motor 6 is started and the support shaft 27
and rotate the grindstone 28. In this state, turn on the power switch 9.
When turned on, initial adjustments are made. In this initial adjustment, phase adjustment of the runout amount data D indicating the runout amount of the rotary grindstone 28 and adjustment of the displayed runout amount are performed by balance detection based on steps 82 to S19 of the flowchart described later. First, balance detection is performed with no weight attached, and at that time, the center frequency adjustment knob 34 is turned so that the detected shake amount is maximized. Then, the adjustment switch SWI is turned on, and the balance state 9 at this time is stored in the RAM 21. Then, "ENd" is displayed on the shake amount display 16. And whetstone 2
8 is stopped, a weight of a predetermined weight is attached to a predetermined position, and the grindstone 28 is rotated again. In this state, when the adjustment switch SW2 is turned on, the phase shift is indicated by a blinking display on the index position display 15, and the deflection amount corresponding to a weight of a predetermined weight is displayed. At this time, turn the phase adjustment knob 33 to adjust the blinking display on the indexing position indicator 15 to the position where the predetermined weight is attached,
Adjust the amount of vibration to a predetermined value using the sensitivity adjustment knob 32. After completing this initial adjustment, the adjustment switches SWI, SW
2 is turned off, the rotation of the grindstone 28 is stopped, the weight is removed, and the process moves on to the balance detection operation described below.

Initial settings are made in step S1, and step S2
Then, it is determined whether or not the support shaft 27 has reached steady rotation. The determination at this time is to measure the pulse interval of the origin detection pulse oscillated from the origin detection sensor 1, store the data in the pulse interval area of the RAM 21 for the specified number of rotations, and then use the data within the next specified number of rotations. CPU
20, and if they are approximately the same number of oscillation pulses, the process moves to the next step S3. If the pulse interval data do not match, the count is restarted from the beginning. In step S3, wait for the origin signal from the origin detection sensor 1 to be output, and at the same time as the origin signal is output, step S3 is performed.
Proceed to step 4.

In steps 84 to S7, while the grindstone 28 rotates once,
The runout amount data D indicating the amount of runout of the rotary grindstone 28 that can be processed by the A/D converter 25 is transferred to the A/D converter 2.
The data are stored in the data area of the RAM 21 in the order detected in Step 5, and are stored in the data area of the RAM 21 in the order detected in Step S.
Proceed to step 8.

In this step S8, the detected shake amount data D is converted into shake amount data D every 10 degrees by the total number of the shake amount data D.
In step S9, the runout amount data Dn divided into every 10 degrees is calculated as data for each index position, and the sum for each index position is calculated, and the averaged data Sn is calculated from the number of data. calculate. In step S10, data Sn averaged for each index position is stored in the RAM2.
Store at 1. Then, in step Sll, it is determined whether or not the detection of the runout amount data D has been repeated at the set number of rotations. If it has been repeated, the process advances to the next step S12, and if not, the process returns to step S2 and continues the steps until the set number of rotations is reached. 32 - Repeat SLI.

In step 312, the average data Sn for each index position is read from the RAM 21, the average data Sn for the set number of revolutions is added for each index position, and the average data Yn is calculated from the set number of revolutions for each index position. The average data Yn is calculated and stored in the RAM 21 in step S13.

From step S14 onwards, a case will be described in which the mode changeover switch 18 is switched to the maximum mode side. Steps 314 to S16 are performed within the specified rotation speed of the grindstone 28. In this step 314, the maximum shake amount and its respective index positions are selected by comparing the average data Yn, and in step 315, maximum shake index position correction and maximum shake amount conversion are performed. This maximum shake index position correction means setting an allowable range for the maximum shake amount and selecting an index position for the shake amount included in the allowable range. Further, the maximum shake amount conversion means converting into an amount that can be displayed on the shake amount display 16.

In step S16, it is determined whether or not the maximum runout amount obtained in step S14 is greater than or equal to a reference value. If it is greater than or equal to the reference value, the process proceeds to step 317; if it is not greater than or equal to the reference value, the balance of the grinding wheel 28 is When it is determined that the balance has been balanced, the process proceeds to step 319, where "good" is displayed on the shake amount display 16 as a signal that the balance has been completed, and the process returns to step S2.

In step S17, the maximum runout amount obtained in step S15 is numerically displayed on the runout amount indicator 16, and the maximum runout amount position is displayed by lighting on the indexing position indicator 15, and the indexing position indicator that is suitable for the maximum runout index position correction is displayed. 15 is lit.

In step 318, when the hold switch 10 is turned on, the display state is held and the hold display 22 indicating the held state is turned on.

When the hold switch 10 is in the off state, step S
Return to step 2 and repeat the maximum shake amount mode display action again.

Note that although the steps after step S14 have been described as the case of the maximum shake amount mode, the shake amount is displayed in the minimum shake amount mode as well with the same effect as in the maximum shake amount mode. At this time, the mode changeover switch 11 is switched to the minimum shake amount mode side, and the minimum shake amount mode indicator 14 is lit. That is, in the case of the minimum shake amount mode, the minimum shake amount and its indexed position are selected and the processes corresponding to steps 314 to S17 are performed.

Furthermore, the display state of the display device that is displayed based on the contents of the above-mentioned program will be explained. At the same time as the power switch 9 is turned on, "-part 11" is displayed on each digit of the shake amount display 16 until the rotational speed becomes stable. Then, as the rotation of the grindstone 28 stabilizes, the runout amount is displayed on the runout amount display 16 at each specified rotation speed, and the display 15 at the index position of the maximum runout amount indicated by the runout amount display 16 is blinked. The index position indicator 15 corresponding to the maximum shake index position correction is turned on. At this time, one of the maximum shake amount display 13 and the minimum shake amount display 14 is turned on by the mode changeover switch 11. If the grinding wheel 28 is corrected and the balance is achieved, the runout amount display 16 will indicate “good”.
" is displayed. After turning on the hold switch 10, the origin indicator 12 lights up as the grindstone 28 passes the origin.

According to this balance detection and display device, the balance state of the grindstone can be easily displayed, so the balance state of the grindstone can be easily recognized.

To complete the balance measurement of the rotary grindstone 28 as described above and measure the rotational balance of another machine, attach the light reflecting plate 6 to the rotating body of the other machine to be measured, and attach the light reflecting plate 6 to the rotating body of the other machine to be measured. The origin detection sensor 1 may be relocated so as to face the rotation range of , and the balance indicator 3 may be installed near other machines.

Note that this invention is not limited to the above embodiments,
It is also possible to embody each modification described in the next section.

(1) Displays are arranged linearly or radially to simultaneously display the amount of shake and its indexed position in analog form.

(2) Change the light emitting diode to a two-color light emitting diode,
Distinguish between maximum runout amount and minimum runout amount.

(3) Adjust the center frequency by the CPU based on the rotation speed of the rotating body.

Effects of the Invention As detailed above, this invention has an excellent effect of being able to measure and display the balance state of the rotating bodies of a large number of machine tools without being incorporated into the machine tool. .

[Brief explanation of the drawing]

Figure 1 is a front view of a balance detection display embodying this invention, Figure 2 is an electrical circuit diagram inside the display, Figure 3 is a block diagram of the filter circuit, and Figure 4 is how the balance detection display is used. A side view showing the state, and FIG. 5 is a flowchart. In the figure, 1 is an origin detector, 2 is a vibration detector, 3 is a display, 4 is a rotating body, and 6 is a light reflector. Patent Applicant Nagase Iron Works Co., Ltd. Agent Patent Attorney On 1) Hirosen Voluntary Procedure Amendment Layer January 16, 1985 Manabu Shiga Director General of the Machiki Agency 2 Name of the Invention Balance Detection Display for Rotating Body 1ffi 3 Amendment Relationship with the case of the person who did the following: Patent applicant Name: Nagase Iron Works Co., Ltd. (Name) 4. Agent address: No. 2 Equipment, Hatazume-cho, Gifu City, 500 Japan <058
2>65-1810 (Representative) Explanation column, Drawing 6, Contents of amendment (1) The power of attorney will be amended as shown in the attached sheet. (2) Amend the statement in the scope of claims column of the specification as shown in the attached sheet. (3) The statement "this invention" on page 2, line 14 of the specification is amended to read "the problem to be solved by this invention is". (4) In line 17 of the same page, the statement "to aim for..." is amended to "to aim for." (5) The description of "at" in lines 19 and 20 of the same page is corrected to read "at the rotational balance detection and display device." (6) The description of “Rotary grindstone 4” on page 2, No. 14 of the specification has been changed to “
"Whetstone 28 as a rotating body". (7) The description of "Whetstone 4" in lines 4 and 5 of the same page is corrected to "Whetstone 28." (8) The description of "machine 5" in lines 4 and 5 of the same page and lines 4 to 5 of page 8 of the specification is corrected to "frame 26", respectively. (9) "Rotating body 4" on page 4, line 10 and line 18 of the specification, page 5, line 6, page M66, page 5, and lines 12 and 13 of the same page
The descriptions in the above are corrected to "Whetstone 28". (10) The description of "machine base" on page 9, line 12 of the specification is corrected to "frame 26." (11) The description of FROM22J on page 9, line 17 of the specification is corrected to FROM20J. (12) The description of rRAM23J in lines 17 to 18 of the same page is corrected to rRAM21J. (13) [Filtering circuit 17] on page 7, lines 3 to 4 of the specification
The description "via the filter circuit 17 and the A/D converter 25" is corrected to "via the filter circuit 17 and the A/D converter 25." (14) Change the statement “as shown in Figure 3” in line 9 of the same page to [3
As shown in the figure, correct it as ]. (15) In lines 12 to 14 of the same page, change the description of "variable resistance...peak value" to [variable resistance R2 is varied by the center frequency adjustment knob 34 to synchronize the center frequency with the vibration of the grindstone 28. "Like that," he corrected. (16) The description of "Figure 3" on page 8, line 5 of the specification is amended to read "Figure 4." (17) Line 10 of the same page, page 9 of the specification, line 9, and line 1 of the same page.
The description of "rotary grindstone 28" in the seventh line of page 1 is corrected to "grindstone 28." (18) The description of "detect" on page 8, line 19 of the specification is amended to "detect". (19> Change the description of “Drawings” on page 9, line 1 of the specification to “4.
Correct it to "Fig." (20) The description of "Figure 4" on the third line of the same page is corrected to "Figure 5." (21) Change the description of "Motor 6" in the 6th line of the same page to "Motor 3".
0”. (22) Change the description of rENd J on line 19 of the same page to “END
Correct it with J. (23) In the specification, page 10, line 3, the description of "position display 15" is corrected to "position display body 15." (24) Change the description of “frequency” on page 16, line 10 to “
Correct the frequency to synchronize with the vibration of the rotating body. (25) The description of "circuit diagram" on line 18 of the same page is corrected to "block diagram showing the circuit." (26) In line 19 of the same page, the description of "Block diagram of" is corrected to "Electrical circuit diagram showing". (27) Line 20 of the same page: “Evening side view showing how it is used”
``Side view of the surface grinder showing the installed state''
and correct it. (26) The statement "4 is a rotating body" on page 17, line 3 of the specification is corrected to [28 is a grindstone as a rotating body]. (27) Correct Figure 4 of the cylinder in the drawing as shown in the attached sheet. ``2. Claim 1, attached to the surface of the rotating body (28),
a light reflector (6) that indicates the origin of the rotation direction of the light reflector (6); and a light reflection type origin detector (6) that is arranged to face the rotation range of the light reflector (6) and detects the light reflector (6). 1〉
a vibration detector (2) that detects vibrations of the rotating body 1; a control means (18) that calculates shake amounts corresponding to a plurality of indexed positions based on the origin from the vibration; and the control means ( An indicator (3) that displays at least the indexed position where the vibration is maximum or minimum based on the action of 18).
A balance detection and display device for a rotating body, characterized by comprising: ”

Claims (1)

[Claims] 1. Attached to the surface of the rotating body (4), the rotating body (4)
A light reflector (6) indicating the origin of the rotational direction, and a light reflector (6)
), and its light reflector (
6); a vibration detector (2) that detects the vibration of the rotating body (4); A control means (18) that calculates the amount of vibration; and an indicator (3) that displays at least the indexed position where the vibration is maximum or minimum based on the action of the control means (18).
A balance detection and display device for a rotating body, characterized by comprising: