JPH03115505A - Method for setting shaking wave form - Google Patents

Abstract

PURPOSE:To reduce number of input data by inputting only shaking angular datum at each divided part and calculating angular velocity at each divided part based on the prescribed operational expression from the shaking angular data. CONSTITUTION:In the part to be driven, each divided shaking angular data and angular velocity to be necessary to periodically shake are set by dividing the shaking angle theta into plural parts P1L-PNL, P1R-PNR making shaking center line Cl as boundary around a swinging shaft 0 thereof to a first and second directions of mutually reverse direction. Then, only shaking angular datum for each divided part theta1L-thetaNL, theta1R-thetaNR is inputted. The angular velocity data omega1L-omegaNL, omega1R-omegaNR for the divided parts P1L-PNL, P1R-PNR are calculated based on the prescribed operational expression from the inputted shaking angular data. By this method, correction of the inputted data can be easily executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of setting an oscillating waveform, and in particular, a method of setting an oscillating waveform of an oscillating angle of an atomizer used in manufacturing a preform. Regarding.

[Conventional technology]

The applicant of this application filed a patent application filed on June 20, 1988.
In No. 150232, an application was filed for an invention titled "Method for manufacturing preforms using the Osprey method."

This filed invention is applied to a preform manufacturing apparatus as shown in FIG. That is, the molten metal 2 in the tundish dish 1 is caused to flow down from a nozzle 3 provided at the lower part of the tundish dish 1. High-pressure inert gas is blown from the disc atomizer 4 onto the metal that has flowed down, thereby atomizing the metal that has flowed down. The atomized metal particles are deposited on a moving collector 5 to form a preform 6. This method of manufacturing a preform is called the Osprey method.

The control device for the atomizer 4 proposed in this filed invention is shown in FIG. That is, data setter 1
Based on the input data (described later) regarding the swing angle θ of the atomizer 4 inputted from 0, the waveform generator 11
A setting waveform signal θ(1) for the swing angle θ of the atomizer 4 is generated. The calculator 12 calculates the difference between this setting waveform signal and the position detection signal from the speed/position detector 14 attached to the driven part 13, which is the atomizer 4, and outputs a speed command signal corresponding to this difference. do. In response to this speed command signal and the speed detection signal from the speed/position detector 14, the driver 15 drives the driven portion 13.

In this filed invention, as shown in FIG.
When manufacturing a preform, the swing angle θ of the atomizer 4 is adjusted to a plurality of (for example, N) portions P I * P
2 + . . . , PN, and the angular velocity of each divided portion of the atomizer 4 is changed.

In order to change this angular velocity, the data setter 1
0 contains the division number data N of the swing angle θ as human data.
and angle data θ1 of each divided portion. θ2. ...
, θ8, and angular velocity data ω1 of each divided portion. ω2
．． ..., ω9 and cycle number data C (or oscillation period data T-1/C) are input.

[Problem to be solved by the invention]

Therefore, in the conventional method, the number of data to be input into the data setting device is as large as (2N+2), and there is a drawback that inputting the data is very time-consuming.

Another drawback is that data cannot be easily modified.

[Means to solve the problem]

The present invention moves a driven part such as an atomizer into first and second directions that are opposite to each other around a rotational axis of the driven part, with the swinging center position of the driven part as a boundary. This is a method of setting the swing angle data and angular velocity data of each divided part, which is necessary to divide the swing angle into multiple parts and periodically swing the swing angle in the direction. S1 and 2nd
There are aspects of this.

The method for setting a swing waveform according to the first aspect of the present invention includes the steps of manually inputting only the swing angle data of each of the divided parts, and the step of manually calculating the swing angle data of each of the divided parts based on a predetermined calculation formula from the input swing angle data. and calculating angular velocity data of the divided portions.

A method for setting a swing waveform according to a second aspect of the present invention includes a step of inputting only angular velocity data of each divided portion, and a step of inputting only angular velocity data of each divided portion, and a step of inputting angular velocity data of each divided portion based on a predetermined calculation formula from the input angular velocity data. and calculating sway angle data of the portion.

[For production]

In the present invention, only one of the swing angle data and angular velocity data of each divided portion is input, and the other is calculated. Therefore, the number of input data can be reduced. Therefore, even when modifying input data, it is easy to modify only one of the above items. Furthermore, if the swing waveform is symmetrical with respect to the swing center line, the first
Since it is only necessary to input data in either the direction or the second direction, it is possible to further reduce the amount of human data.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, the present invention rotates a driven part such as an atomizer around a rotation axis O of the driven part, with the swing center line c (l as the border) of the driven part. , in the first and second directions (horizontal direction in the drawing) that are opposite to each other, the swing angle θ is divided into a plurality of parts (NL to the left, NR to the right, the total number of divisions N - NL + NR) ( In the left direction, PIL+
P 2L+...r P NL% PIR+ in the right direction
Swing angle data of each divided part (θlL+ θ2Li..., θNL% in the left direction, θIM+ θ2R1..., θNR in the right direction) necessary for dividing and swinging into P2Rr...,PNR) ) and angular velocity data (ωlL+ ω2L+ ..., ωNL in the left direction)
% ω in the right direction, 2. This is a method of setting ω2R+ ..., ωNi1).

The oscillation waveform setting method of the present invention has two aspects.

The first aspect is each divided portion (PIL).

P2L+ ...+ P NL+ P IR+ P
2R+ ..., PNR) swing angle data (θIL+
θ2L+..., θre, θ18. θ2R+...,
The process of inputting only θNR) and the angular velocity data of each divided portion (ωIL+ ω2L+ ... ωNL+) based on a predetermined calculation formula from this input swing angle data
ω1M+ ω2R+ . . . , ωNR). The second aspect is
Each divided part (PIL+P2L*...+
PNL+PIR+P2R+...,PNR)
Angular velocity data (ωIL+ω2L+ ”'+ ωNL+
A process of inputting only ωlR+ ω2R+..., ωNR), and a process of inputting only the sway angle data (θlL+
θ2L+ ..., θNL+ θlR+ θ23.
... θNR). First, the first aspect will be explained in detail. Details of the second aspect will be described later.

Next, the method for setting the oscillating waveform according to the present invention will be explained using an atomizer.
A case where the present invention is applied to the control device 4 (FIG. 8) will be explained.

Referring to FIG. 2, the atomizer control device to which the oscillation waveform setting method according to the first aspect of the present invention is applied is as follows:
Except for the addition of an angle/angular velocity converter 16,
It has the same configuration as FIG. 9.

The data setter 10 contains division number data NL.

NR and swing angle data θIL+ θ2L+...
θNL+θlR+ θ2' R+ ..., θNR, cycle number data C (-1/T), and left and right time ratio (
TL/TR). However, in this case of T-TL+TR0, the number of data to be input to the data setter 10 is (4+N). These input data are supplied to a waveform generator 11 and an angle/angular velocity converter 16. The angle/angular velocity converter 16 converts swing angle data θIL+02
0. ..., θNL+ θIR+ θ2R+..., θ
NR as angular velocity data ωlL+ ω2L+ ”'r ωN
L+ ωIR is converted to ω2R+ . . . , ωNR.

This converted angular velocity data is supplied to the waveform generator 11.

Next, the conversion algorithm of the angle/angular velocity converter 16 will be explained. Here, the divided portion P I in the left direction
L+P2...+PNL each transit time τ,
are the same, and similarly, the rightward divided portion PIR
It is assumed that the transit time τ□ of each of +P 2R+...+PNR is also the same. That is, τt =T/(2N
L), τR−T/(2NR).

In this case, leftward angular velocity data ω+ (i-IL,
2L, . . . , NL) are the leftward swing angle data θ1 and the passage time τ of the leftward divided portion.

It is expressed by the following formula.

ω, -θ, /τ, ... (1) Similarly, rightward angular velocity data ωh (k-IR2R, ...,
NR) is rightward swing angle data θ.

and the passage time τ2 of the divided portion in the right direction, it is expressed by the following equation.

ω is equal to one θ/τR (2) In the above, the case of general rocking has been described, but next, the case where the rocking is bilaterally symmetrical will be described.

In this case, since the relationships θ, -θ4, and ω1-ω1 hold, it is only necessary to input data in one of the left and right directions.

Referring also to FIG. 3, the input data from the data setter 10 includes data for selecting left and right symmetry, division number data (N/2) (-NL-NR), and swing angle data. θ1. θ2. ... θ77,2 and cycle number data C may be input. In this case, the number of data to be input to the data setter 10 is (3+(N/2)
)) (11 is enough.

Although the swing angle is symmetrical, the left and right times TL and TR are
If they are different, also input the left and right time ratio (TL/TR). Therefore, the number of data to be input is (4+ (N
/2) 1 piece.

In this case as well, the divided portion P1□P 2 +
..., P87□ are assumed to have the same transit time τ, the conversion algorithm of the angle/angular velocity converter 16 is as follows. That is, the angular velocity data ωr (
j-1, 2, ..., (N/2)) is the swing angle data θ
, and the transit time τ of the divided portions, it is expressed by the following equation.

ωJ −θ) /τ...
(3) Next, details of the second aspect of the present invention will be explained.

Referring to FIG. 4, the atomizer control device to which the oscillation waveform setting method according to the second aspect of the present invention is applied is as follows:
It has the same configuration as that in FIG. 2 except that an angular velocity/angle converter 17 is provided in place of the angle/angular velocity converter 16.

The data setter 10 provides division number data NL.

NR and angular velocity data ω15. ω2L+ ..., ω9
．． .

ωlR+ ω2R+ ”'+ ωNR, cycle number data C (-1/T), and left and right time ratio (TL/TR)
Enter . However, in this case, the number of data to be input to the data setter 10 is (4+TR).
N) pieces. These input data are supplied to a waveform generator 11 and an angular velocity/angle converter 17. The angular velocity/angle converter 17 converts the angular velocity data ωth, l ω2L+ ”'
r ωN L r ωIR+ ω2R1′”°,
ωNil is the swing angle data θlL+ θ2L+...
・, θNL+ θIR+θ2R+ ..., Convert to θNR. This converted swing angle data is sent to the waveform generator 1.
1.

After the same assumption as in FIG. 2, the angular velocity/angle converter 17 converts the leftward swing angle data θ, by the leftward angular velocity data ω1 and the transit time τL of the leftward divided portion. , calculated using the following formula.

θI pigeon ω1 × τL (4) Similarly, the rightward swing angle data θ is the rightward angular velocity data ω,
and the transit time τR of the divided portion in the right direction,
It is determined by the following formula.

θh−ω−×τR (5) When the swing is symmetrical, the input data from the data setter 10 is data for selecting left and right symmetry, and division number data (N/2 )(-NL-NR) and angular velocity data ω1. ω2. ... ωN/□ and cycle number data C may be input. In this case, the number of data to be input to the data setter 10 is +3+ (N/2
) Only one piece is required.

If the left and right times are different, the left and right time ratio (TL/T
Also input R). Sway angle data θ under the assumption that the transit time τ of the divided parts is the same.

is expressed by the following equation using the angular velocity data ω1 and the transit time τ of the divided portions.

θ, -ω, Xτ...(6) FIG. 5 shows an example of the oscillating waveform generated from the waveform generator 11 by the setting method of the present invention, and FIG. 6 shows the preform generated thereby. An example of the shape is shown. In each of Figure 5,
The positive (plus) side of the oscillating waveform is the left side, and the negative (minus) side is the right side.

51), when the swing waveform is bilaterally symmetrical as shown in FIG. , -θk),
The oscillation waveform is shown when the left and right times are the same (TL-TR). In this example, the number of divisions N is 6, so the number of data to be input is 6. As a result, the shape of the preform shown in ff16 Figure I) can be obtained. In this example, the left and right deposition amounts can be controlled by changing the time ratio (TL/TR).

5) shows a swing waveform when the left and right angles are different but the left and right times are the same (TL-TR) as shown in FIG. In this example, the number of divisions N is 6, so the number of data to be input is 10. As a result, Figure 6 ■
) can be obtained.

5) shows a swing waveform when the left and right swing angles are the same, but the number of left and right divisions and the left and right times are different.

In this example, the number of divisions N is 6, as in Figure 5 ■), so
The number of data to be input is 10. As a result, the shape of the preform shown in FIG. 6 (■) can be obtained.

FIG. 5 (■) shows a swing waveform when both the left and right angles and the left and right times are different. In this example as well, since the number of divisions N is 6, the number of data to be input is 10. As a result, the shape of the preform shown in FIG. 6 (■) can be obtained.

Referring to FIG. 7, an example of the waveform of the preform on the collector 5 (FIG. 8) with the left and right angles changed during operation is shown.

In this example, the shape on the left side is constant and the shape on the right side is changed. In order to obtain the preform 6 having the shape of this example, the angle on the left side may be kept constant and the angle on the right side may be successively changed.

〔Effect of the invention〕

As is clear from the above explanation, only one of the swing angle data and angular velocity data of the divided parts of the swing angle is input and the other is calculated, reducing the number of manual data. can do. Furthermore, when modifying the input data, it is only necessary to change the above-mentioned "-", so there is an effect that the modification can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a general example of dividing a swing angle to explain the method of setting a swing waveform according to the present invention, and FIG. 2 is a diagram showing a driven part to which the first aspect of the present invention is applied. FIG. 3 is a block diagram showing the configuration of the control device. FIG. 3 is a diagram showing an example of dividing the swing angle when the swing waveform is bilaterally symmetrical to explain the method of setting the swing waveform of the present invention. FIG. A block diagram showing the configuration of a control device for a driven part to which a second aspect of the present invention is applied,
5 is a diagram showing an example of the oscillating waveform generated from the waveform generator by the setting method of the present invention, FIG. 6 is a sectional view showing an example of the shape of the preform generated corresponding to FIG. Fig. 7 is a plan view showing an example of the shape of the preform on the collector with the left and right swing angle changed during operation, and Fig. 8 is the Osprey method to which the swing waveform setting method of the present invention is applied. FIG. 9 is a block diagram showing the configuration of an atomizer control device using a conventional method for setting an oscillating waveform, and FIG. It is a figure which shows the example of a division|segmentation of a rocking angle for explanation. 10... Data setter, 16... Angle/angular velocity converter, 17... Angular velocity/angle converter. Figure 1 Figure 3 Figure 5 Figure 5 Figure e(t) Figure 8 Figure 1 o

Claims (1)

[Claims] 1. The driven part is rotated around the rotational axis of the driven part in the first direction opposite to each other with the pivot center line of the driven part as the boundary.
and a method for setting swing angle data and angular velocity data of each divided part necessary for dividing the swing angle into a plurality of parts and periodically swinging in the second direction, a step of inputting only the swing angle data of the divided portion; and a step of calculating angular velocity data of each divided portion based on a predetermined calculation formula from the input swing angle data. Method. 2. When the number of divisions in the first and second directions is the same, inputting only the swing angle data is a step of inputting only swing angle data in one of the first and second directions;
2. The method of setting an oscillation waveform according to claim 1, further comprising the step of inputting a time ratio between the first and second directions. 3. Swing angle of the driven part around the rotation axis of the driven part in the first and second directions, which are opposite directions, with the swing center position of the driven part as the border. In a method for setting swing angle data and angular velocity data of each divided part necessary for dividing and swinging into a plurality of parts, the step of inputting only the angular velocity data of each divided part; A method for setting a swing waveform, comprising the step of calculating swing angle data of each of the divided portions based on a predetermined arithmetic expression from the input angular velocity data. 4. When the number of divisions in the first and second directions is the same, inputting only the angular velocity data is a step of inputting only angular velocity data in one of the first and second directions;
4. The method of setting an oscillation waveform according to claim 3, further comprising the step of inputting a time ratio between the first and second directions.