JPS5876760A - Method and apparatus for calculating torque generation time - Google Patents

Abstract

PURPOSE:To calculate generation time of a torque with a desired ratio easily and accurately by determining and memorizing minimum and maximum torque values and the generation time thereof with a computer processing based on the peak of outputs and measured time value in a vulcanization level test. CONSTITUTION:A torque output for a vulcanization level tester 2 is inputted into a computer 10 via an amplifier 4 and a sample hold A/D conversion section 6. On the other hand, the peak value of the torque output is detected with a peak detecting section 8 and inputted into a computer 10 with an elapse time from the start of the tester 2 by a time measuring section 12. Then, the minimum value TMIN and the maximum value TMAX of the torque are determined by comparison of peak values sequentially inputted and memorized into a memory section of the computer 10 with the generation time. According to the memory contents, the generation time of a torque with a desired ratio is calculated with the computer 10 putting the minimum value at 0% and the maximum value 100% with a setting device 30. Thus, the generation time of the torque with a desired ratio can be found easily and accurately eliminating calculation based on recorded information or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for calculating the time at which the torque value of rubber during vulcanization reaches a predetermined value.

In general, a vulcanization degree tester measures the waveform of the torque value (stress when a constant rotation angle I is given) for each elapsed time of rubber during vulcanization, that is, the waveform (torque It is possible to obtain the waveform of the output signal (waveform of the output signal) and the waveform drawn by the dotted line in the same figure (the waveform of only the peak value on the second side of the solid line waveform), which is very convenient for checking the condition of vulcanization and curing of rubber, etc. Although it is a device,
■Since all the data appears on the recording paper, it is necessary to read and calculate the necessary data from the recording paper. ■When processing data using many such measuring devices in a row. , Since it does not output organized data as described above, it is very burdensome for the host computer, and it cannot be processed cheaply, quickly, and accurately. Regardless of whether it is available or not, the problem is that it is rarely used because the data processing is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus that can easily determine the time at which a torque is generated at an appropriate ratio. Hereinafter, this invention will be explained using a meter I based on one embodiment shown in FIGS. 2 to 5.

In FIG. 2, reference numeral 2 denotes the vulcanization degree testing machine described above, which starts operating at the same time as the start of vulcanization of the rubber, and generates an output signal as shown in FIG. This output signal is amplified by an amplifier section 4 and then supplied to a sample-hold conversion section 6.
The output signal of the vulcanization tester 2 is also supplied to a peak detector 8, and the peak detector 8 is composed of, for example, a differential circuit, and detects each upper peak value of the output signal of the vulcanization tester 2. A detection signal is generated each time it is detected. Every time a detection signal is generated, the sample-hold A/D converter 6 converts the output signal of the amplifier 4 (the amplified peak value of the output signal of the vulcanization tester 2) into a digital signal and converts it into a computer. 10, and the computer 10 sequentially stores these digital values. computer 10 at the same time
stores the time measurement value of the time measuring section 12 which started operating at the same time as the vulcanization tester 2 started operating, every time a detection signal is generated. Therefore, these stored values represent the times at which the respective peak values of the output signal of the vulcanization tester 2 occur based on the time when the vulcanization tester 2 starts operating.

In parallel with this storage of each digital peak value and each peak value occurrence time, a search for the minimum value TMIN among each peak value is performed. This search sequentially judges whether or not the digital peak values stored in sequence are smaller than the minimum digital beater value stored up to that point, and if it is smaller, the above judgment is made for the next digital value as well. conduct,
If it is larger, the digital value immediately preceding that digital value is determined to be the true minimum value TM1N. For example, when the digital value of peak value 14 shown in FIG. is the current initial value. When the next digital value of peak value 1B is stored, since this peak value 1B is also smaller than the peak value 16 that was previously determined to be the minimum value, this peak value 1B is set as the current value (J is the first value and the determination is completed). When the digital value of peak value 20 is stored, this peak value 20 is larger than the peak value 18 previously determined to be the initial value, so the peak value 1 day is determined to be the true minimum value TMIN.

After completing the search for the minimum value TM, a search for the maximum value TMAX is performed in parallel with the storage of the digital value of each peak value. In this search, when a peak digital value is stored, it is determined whether this digital value is larger than the maximum value of the previously stored digital values, and if it is larger, the same judgment is made for the next digital value. If the digital value is smaller, the digital value immediately before that digital value is determined to be the true maximum value TMAX. For example, if the digital value of peak value 22 shown in FIG.
is the current maximum value.

When the next digital value of peak value 26 is stored, since this peak value 26 is also larger than the peak value 22 previously determined to be the maximum value, this peak value 26 is determined to be the current maximum value. And when the peak value on day 2 is memorized,
This peak value 28 is the peak value 26 that was previously determined to be the maximum value.
Since it is smaller than the peak value 26, the true maximum value TMAX
I judge that.

When the search for the maximum value TMAX and minimum value TMIN is completed, the computer 1o calculates a torque value T9o corresponding to the ratio set in the setting device 5o, for example, 90%. , Incidentally, this 90th factor is the minimum value TM]N. Since the maximum value T is taken as 100%, the calculation AX formula is T2O-TMIN+0"9 (TMAX-TMIN).

When the calculation of T9O is completed, the computer 10 selects the digital value T of the peak value (32 in FIG. 1) that is smaller and closest to T9° from among the stored digital values of each peak value, and calculates T,. Digital value T of the nearest peak value (24 in Figure 1)
, and select the torque 2 occurrence time t2□, 1 corresponding to T2□, T. Choose.

Then, the computer 10 sets TI, TZ2 as y coordinates, t2□, t22 as X coordinates, (1; 2□, T2□)
A linear equation connecting (t22, T22) is calculated, and from this linear equation, the time t90 when y becomes T9O is calculated.
Calculate. The flowchart for calculating t9o is shown in FIG. The calculated t, the maximum value TMAX, and the 0 minimum value TMIN are displayed on the display section 32 and printer section 34.

Note that depending on the rubber to be vulcanized, the torque value may continue to rise indefinitely without reaching the maximum value, but in preparation for such cases, a timer or the like is installed for the maximum elapsed time. If the maximum value TMAX is still not obtained when the maximum elapsed time is reached, the torque value at that time is handled as the maximum value TMAX.

In this embodiment, in addition to being able to calculate the time when the torque value reaches the predetermined ratio, it is also possible to obtain data regarding the deviation between the actual torque value generation angle and the maximum rotation angle. That is, the angle at which the torque value is generated and the maximum rotation angle should originally match, but since rubber has viscoelasticity, there is a deviation in the inner angle. The degree of this deviation is shown in a graph in FIG. 4, where (a) shows the angle of occurrence of the torque value (stress), and (b) shows the rotation angle (displacement). Therefore, a proximity switch is provided at the position of the maximum rotation angle of the rubber in the vulcanization tester 2, and a pulse signal generated by the proximity switch is generated by the waveform shaping section 4o as shown in FIG. 2 every time the rubber reaches the maximum rotation angle position. formatted with computer 0
and the time X from when the initial pulse signal is supplied until the peak detector 8 generates the detection signal, and the time y from when the initial pulse signal is supplied until the next pulse signal is supplied. and calculate y-x to find the peak torque generation time and maximum rotation angle time yt, t
is determined, y is one cycle time of the maximum rotation angle, and the inner angle deviation δ is determined from t and 1:C. A flowchart for calculating the inner angle difference nδ is shown in FIG. 1. Note that δ is not calculated only once, but is calculated sequentially. Further, although δ was determined based on the difference between the time when the maximum angle is reached and the time when the peak torque value is reached, it can also be determined using the difference between the time when the angle becomes 0 and the time when the torque becomes 0.

According to the method and apparatus according to the present invention, it is possible to automatically know the generation time of a torque value of a predetermined ratio, whereas conventionally it took time to read and calculate necessary data from a recording paper. It is convenient because it can perform the following tests, and is particularly effective when many vulcanization testers are being operated.

In the above embodiment, only the upper peak value is detected, but the lower peak value or both upper and lower peak values may be detected. When reading both sides, the input value to the computer 10 must be an absolute value. Further, although the ratio is set at 90%, other ratios may be set, and the number of settings does not need to be one.If a digital switch is used in the setting device 30, the user can set the set value arbitrarily. This is convenient because it can be changed. t9o is roughly calculated using (Tz1ゝt) and (T22, t22), and t is the time of occurrence of a value close to t9o among T2□ or TZ2. There is no practical difference even if it is closed.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the output signal of the vulcanization tester used in the present invention, Fig. 2 is a block diagram of the torque generation time calculation device according to the invention, and Fig. 3 is a flowchart showing the torque generation time calculation method. 1., Figure 4 (a) and (b) are diagrams showing the deviation between the rubber torque value generation time and the maximum rotation angle time, Figure 5 1. The deviation between the rubber torque value generation angle and the maximum rotation angle 2 is a flowchart showing a method for determining . 2... Vulcanization degree tester, 8... Detection section, 10... Computer, 12... Time measurement section. Patent applicant: Sumitomo Rubber Industries, Ltd. Agent: Satoshi Shimizu (2 people (11 people)
) S l Eye 3 Diagram Suffu-I LAX "D (ru-1) - Input" End of 11
Beefy Naogo 7, ToriχrCustomer・i ゛ -Hee-fii [Ding,, inside of T2-] θ
than θ,
Beefy LIL7j+2zoton LItrn)＼
Unryoku\Ta 4 Written amendment to drawing procedures (voluntary) February 2, 1980 1, Indication of the case Japanese Patent Application No. 174980/1982 2, Name of the invention Torque generation time calculation method and device 3, Person making the amendment Case and Relationship: Patent applicant 1-1-1-4 Tsutsui-cho, Chuo-ku, Kobe City, agent address: Postal code 651-5, "Detailed description of the invention 1-1" column of the specification to be amended. 6. Details of the amendment (1) Page 5 of the specification, lines 15 and 18 [the words ``initial value'' in lines 1 and 20, respectively, are corrected to read 1 ``minimum value.'' (2) In the 13th line of page 9, the phrase ``open during the cycle'' is corrected to ``also the cycle time.'' 2335

Claims (2)

[Claims] (1) A process of sequentially storing each peak value of the signal generated by the vulcanization degree tester representing the fluctuation of the torque value of the rubber during vulcanization and the time of occurrence of each of these peak values, and a process in parallel with this storage process. a process of searching for the minimum value of the peak values and the time of occurrence of the minimum value; a process of searching for the maximum value of the peak values and the time of occurrence of the maximum value in parallel with the storage process; a process of calculating a torque value corresponding to a predetermined ratio based on the above-determined ratio; A torque generation time calculation method comprising the steps of searching for the closest one and its generation time, and calculating the generation time of the calculated torque value based on these search values and the distributed calculated torque value. (2) a detection circuit for each peak value of the signal from the vulcanization degree tester that represents fluctuations in the torque value of the rubber during vulcanization; and a time measuring device that measures the time from the start of vulcanization; A function to read the signal of the υl sulfur tester and the output of the time measuring device each time the peak detection circuit generates a detection signal, and the maximum and minimum values of the read signal of the vulcanization tester. A function to select a value, a function to calculate a torque value corresponding to a predetermined ratio based on the above maximum value and minimum value, a function to select a torque value that is larger than the above calculated torque value among the signals from the vulcanization tester read above. A function to search for the closest one and its occurrence time, and the closest thing smaller than the calculated torque value and its occurrence time, and calculate the occurrence time of the calculated torque value based on these search values and the calculated torque value. A torque generation time calculation device consisting of a computer with functions.