JPH0367582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a rotational balance display device that detects and displays the rotational balance of a grindstone of a grinding machine, for example.

(Prior Art) No prior art corresponding to this invention has been found.

(Problems to be Solved by the Invention) An object of the present invention is to easily and easily recognize the rotational imbalance of a rotating body such as a grindstone, and to
An object of the present invention is to provide a rotational balance display device that can accurately display the rotational balance.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a plurality of position indicators that correspond to each indexed position of the rotating body and are lit according to the vibration state of the rotating body. The rotating body is configured to include a position display section in which bodies are arranged side by side in an annular shape, and a deflection amount display section that displays the deflection amount of the rotating body.

(Function) Based on the above configuration, in the present invention, the amount of runout and its indexed position can be confirmed at a glance.

(Example) Hereinafter, an example in which the present invention is embodied in a rotational balance display device for a grindstone will be described based on the drawings.

A table 2 for holding a workpiece W is provided on a frame 1 of the grinding machine. table 2
A support shaft 4 is rotatably attached to the top, and a rotating body 3 is fixedly installed at the tip of the support shaft 4 so as to be positioned on the workpiece W on the table 2. A motor 6 for driving the support shaft 4 is arranged behind the support shaft 4.

A detection piece 9 is provided protruding from the outer periphery of the base end of the support shaft 4 . Further, on the frame outside the base end of the support shaft 4, there is an origin detector 7 made of a photocoupler.
is provided, and an origin detection signal is output each time the detection piece 9 passes through this portion. Further, a permanent magnet 12 is fixed around the support shaft 4, and a coil 13 is arranged on the frame so as to surround the permanent magnet 12. An acceleration pickup 8 is configured as the quantity detector 5. The acceleration pickup 8 detects the amount of deflection by using changes in current due to changes in magnetic flux from the permanent magnet 12 passing through the coil.

Further, on the support shaft 4, a rotary plate 1 is provided with light transmitting parts and non-transparent parts arranged alternately at a center angle of 10 degrees.
4 is fixed, and a photocoupler 11 corresponding to this rotary plate 14 is fixed on the frame 1, and the photocoupler 11 outputs an index position signal every time the support shaft 4 rotates 10 degrees. The rotating plate 14 and the photocoupler 11 constitute an indexing position setting device 15.

A display 10 is arranged and fixed on the outside of the frame 1, and a power switch 16 is provided on the side surface of the display 10 for turning on and off the balance display device of this embodiment.

A position display section 17 is provided on the front surface of the display device 10, and the position display section 17 displays a display at every 10 degrees of rotation angle corresponding to each index position of the support shaft 4 indexed by the index position setter 15. A total of 36 indexing position indicators 18 are arranged in a ring. Each indexing position display body 18 includes a red light emitting diode and a green light emitting diode. Further, an origin indicator 19 having a built-in light emitting diode is arranged to correspond to an index position indicator 18 for the angular position at which the origin detector 7 generates a signal. A runout amount display section 20 that numerically displays the amount of runout of the support shaft 4 is provided within the ring of the indexing position display body 18, and a maximum runout amount display mode and a minimum runout amount display are also provided within the ring of the position display body 18. Mode display body 21 indicating each mode
a, 21b are provided, and a hold display body 22 indicating a display hold state is also provided. These display bodies 21a, 21b, 22 each have a built-in light emitting diode.

Further, on both sides of the upper part of the position display section 17, a mode changeover switch 23 for selecting a maximum shake amount display mode or a minimum shake amount display mode, and a hold switch 24 for holding the display are arranged. .

FIG. 3 shows a block diagram of the balance display device in this embodiment, and the central processing unit (hereinafter referred to as CPU) 25 as a control means includes the index position setting device 15, the origin detector 7, and the shake amount detector. device 5, index position display 18, shake amount display 20, origin display 19, maximum shake amount display mode display 21a, minimum shake amount display mode display 2
1b, power switch 16, mode selection switch 2
3. A hold switch 24 is connected to each. Further, read-only memory (hereinafter referred to as ROM) 26 and random access memory (hereinafter referred to as RAM) 27 are connected to the CPU 25.
The ROM 26 contains an operating program for the balance display device of this embodiment, and the RAM 27 has memories 28 to 34, which will be described later.

The operation of the balance display device constructed as above will be explained with reference to the flowchart of FIG. 4.

Now, with the rotating body 3 attached to the support shaft 4, the motor 6 is started to rotate the supporting shaft 4 and the rotating body 3. When the power switch 16 is turned on in this state, initial settings are made in step S1.
Next, in step S2, it is determined whether the support shaft 4 has reached steady rotation. This determination is made by counting the pulse interval of the origin detection pulse signal output from the origin detector 7 for each rotation of the support shaft 4, inputting the data for 3 rotations into the pulse interval memory 28 of the RAM 27, and transmitting it to the CPU 25. If they are almost the same, 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, every time the index position setting device 15 outputs a pulse signal for every 10 degrees of rotation angle, the runout amount data from the runout amount detector 5 at that time is detected.
It is stored in the runout amount memory 29 of the RAM 27, and in step S4 it is determined whether or not each rotation has been made for 4 rotations.If the result is YES, the runout amount data for each rotation angle for 4 rotations is added. The data is stored in the addition memory 30 of the RAM 27 as total shake amount data for each rotation angle.

Next, in step S7, the CPU 25 reads out each piece of data from the addition memory 30, and stores in another memory 31 the rotation angle position indicating the maximum shake amount and the shake amount data.
Next, in step S8, a position indicating a shake amount less than the maximum shake amount by a predetermined amount is stored in the memory 32. Next, in step S9, the position showing the minimum shake amount and its amount are stored in the memory 33, and in step S10, the data of the position showing the shake amount greater than the minimum shake amount by a predetermined amount is stored in the memory 34.

Then, in step S11, it is determined whether the mode changeover switch 23 is at the maximum setting,
In the case of YES, the CPU 25 uses the memory 31,
32, the position indicator 18 corresponding to the position showing the maximum shake amount is lit in red, and the position indicator 18 corresponding to the position where the shake amount is smaller by a predetermined amount is lit in green. , the maximum shake amount is numerically displayed on the display 35.
If the determination in step S11 is NO, the process moves to step S13 and the mode changeover switch 23 is turned on.
It is determined whether is YES or NO, and if YES,
The CPU 25 reads the data from the memories 33 and 34, lights up the position indicator 18 corresponding to the position showing the minimum amount of shake in red, and lights the position indicator 18 corresponding to the amount of shake larger than the predetermined amount in green. The light is turned on and the minimum shake amount is numerically displayed on the display 35.

In the case of the above maximum and minimum display, the display 21a or 21b lights up to notify you of this, so
The operator can recognize the maximum and minimum display modes without error. Further, the origin indicator 19 lights up every time the origin detector 7 outputs a detection signal to indicate the origin position on the position indicator 18, but since the lighting interval is narrow, it appears to continue to be lit.

At the last step S14, hold switch 24
A determination is made as to whether it is ON or OFF, and if YES, the display state processed in step S12 or step S13 is continued. Also, if NO, step
Return to S1.

Effects of the Invention As detailed above, according to the present invention, since the amount of runout and the position corresponding to the amount of runout can be confirmed at a glance, it is possible to easily and easily recognize the rotational imbalance of a rotating body such as a grindstone. It has excellent effects.

[Brief explanation of drawings]

Fig. 1 is a front view of a display embodying the present invention, Fig. 2 is a right side view of a grinding machine in which the invention is applied, and Fig. 3 is a block diagram showing the electrical configuration of a rotational balance display device. FIG. 4 is a flowchart showing the operation of the rotational balance display device. In the figure, 3 is a rotating body, 17 is a position display unit,
18 is a position indicator, and 20 is a shake amount indicator.

Claims (1)

[Scope of Claims] 1. A display device that detects and displays vibrations during rotation of the rotating body 3, which lights up corresponding to each indexed position of the rotating body 3 and according to the vibration state of the rotating body 3. A rotational balance display device comprising: a position display section 17 in which a plurality of position display bodies 18 are arranged side by side in an annular shape, and a deflection amount display section 20 for displaying the deflection amount of the rotating body 3. . 2. The rotational balance display device according to claim 1, wherein the position indicators 18 are arranged in parallel at every 10 degrees of rotation angle. 3. The position indicator 18 includes a red light emitting diode and a green light emitting diode,
3. The rotary balance display device according to claim 1, wherein the light emitting diodes selectively emit light. 4. The rotational balance display device according to claim 1, wherein the shake amount display section 20 is provided within the ring of the position display body 18. 5. The runout amount display unit 20 numerically displays the runout amount of the rotating body 3.
The rotational balance display device described in Section 1.