JPH01294171A - Winding shaft rotation of glass fiber winder and traverse section driving speed control device - Google Patents

Abstract

PURPOSE:To simply perform feedback control by inputting two inputs: the rotating speed at the time of winding start and the winding time until the winding completion, to a rotation setter when winding a thread at a fixed speed in a glass fiber winder. CONSTITUTION:The relationship between the rotating speed N and the winding time T of a winding shaft to make the winding speed of a thread constant is expressed as the function N=B/(T<1/2>) and stored and calculated in a winding shaft rotating speed setter 1. A means to set two inputs: the rotating speed at the time of winding start and the elapsed time until the expected diameter near the maximum winding diameter is attained, to the setter 1 is contained in the setter 1. A winding ratio calculator 6 receives the signal from the setter 1 and calculates according to the equation Nt=eN ((e) is a constant) and outputs the result. A fixed ratio is kept between the traverse cam rotating speed Nt and the winding drum rotating speed N. A traverse separation speed calculator 8 calculates the pulse number P according to the equation P=h/(N<1/2>)...((h) is a constant) and outputs it.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a winding shaft rotation and traverse section drive speed control device of a glass fiber winding machine.

B. Prior Art In a conventional glass fiber winding machine, when controlling the winding drum to wind the yarn at a constant speed (mainly when winding the yarn around a square end cheese at a constant speed), the rotating A cam lift is formed by linearly changing the distance from the center of rotation of the plate cam to the outer peripheral surface in the radial direction of rotation according to the rotation angle, and an electric signal is generated from the displacement of the cam roller that rotates in contact with this cam lift surface in the radial direction of the cam. This produced a signal representing the relationship of the winding drum rotational speed to time.

In addition, in order to move the traverse part away from the bobbin in response to an increase in the winding diameter, the applicant has developed the following (Japanese Patent Publication No. 1854/1983): The voltage displacement in the synchronizer that controls the speed of the variable speed motor that drives the rotation of the motor is linked to the rotating cam via a transmission mechanism consisting of a synchro wheel on the same axis, a carrier, a small gear on the same axis, a rack shaft, etc. A traverse device equipped with a yarn guide that reciprocates in parallel with a spindle is connected to a rotating cam via an arm rotatably supported by a bearing, an arcuate gear, and a rack shaft, and the two rotations described above are A cam is fixed to a cam shaft connected to a driving shaft, and the separation operation of the traverse device and the speed control operation performed by transmitting angular displacement to a synchronizer and converting it into an electric signal are performed in a related manner.

C1 Problem to be Solved by the Invention However, with the former method, there is a large loss due to converting mechanical displacement into an electrical signal, and moreover, when the electrical signal is generated directly versus time, it is difficult to wind it at a constant speed. The rotational speed displacement with respect to the diameter of is a hyperbolic displacement, and this input setting usually requires at least three manual efforts, namely ■ initial speed setting,
■It was necessary to set the slope of the hyperbola and ■time to reach the target diameter. Also, with the latter method, 41! The structure was complicated and the control accuracy was poor.

The present invention solves the above-mentioned problems, and includes an electric control device that can determine a signal of a set rotational speed with respect to time by two inputs when winding a yarn at a constant speed, and a traverse electric control device that is interlocked with the electric control device. The purpose is to provide a control device for

08 Means for Solving the Problems In order to achieve this object, the structure of the present invention is as follows. That is, the take-up shaft rotation speed setting device stores a function that represents the relationship between the take-up shaft rotation speed N and the winding time T as N=Bi in order to keep the yarn winding speed constant. and the winding shaft rotation speed setting device, which is calculated there, and two inputs to the setting device: the rotation speed at the start of winding and the elapsed time until the expected diameter is close to the maximum winding diameter. and means for receiving a signal from the take-up shaft rotation speed setting device to determine that Nt=
A wind ratio calculator that calculates and outputs the traverse cam rotational speed Nt according to the formula eN (e is a constant), and receives the N signal from the setting device and calculates and outputs the number of pulses P to the pulse motor according to the formula and a traverse takeoff speed calculator configured to perform the following steps.

E1 action The comparator amplifier which receives the signal from the take-up shaft rotation speed detector and the signal from the take-up shaft rotation speed setter outputs an operation signal such that the difference between the two signals becomes zero.

This signal is output to the take-up shaft drive motor, and the rotational speed of the motor is feedback-controlled. Here, two inputs, the rotational speed at the start of winding and the elapsed time until the expected maximum winding diameter, are inputted into the setting device. As a result, a control output that keeps the winding speed constant is calculated and output.

F. Example Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, a winding shaft rotational speed setting device 1, a pulse transmitter 2 which is a rotational speed detector of the winding shaft, and a pulse transmitter 2 which receives a signal from the detector 2 and a signal from the setting device 1, a PID@controller 3 that outputs an operation signal such that the signal difference is zero;
A feedback control circuit is shown which includes an inverter 4 which receives an operation signal from the controller 3, converts a change in voltage into a change in frequency, and outputs the same to the winding shaft drive motor 5.

Now, the setting device 1 stores a function representing the relationship between the rotational speed N of the winding shaft and the winding time T to keep the winding speed of the yarn constant, and is calculated using the function. It has become so.

In other words, when winding a square end package as shown in Figure 2, in order to keep the winding speed constant, the rotational speed N (rotations per unit time) of the winding drum should theoretically be adjusted to the winding diameter as shown in Figure 3. number) is inversely proportional to the winding diameter.

Also, the relationship between the winding time and the winding diameter is determined from the increased volume when the winding diameter change is d→D: V=-(D2-d2)
L...(2)V=RT
...(3) Here, ■: Time rr: Increased volume L at IT: Traverse width R: Apparent spinning capacity T: d-D change time From both equations (1) and (2), T=AD"...・(5
) In a normal winder, the winding start diameter Ds is known, and the winding maximum diameter is also known. Now, the diameter at the beginning of the winding is Ds,
If the assumed diameter close to the maximum winding diameter is Df, then from equation (1), Nf=Nsx −...(7) Df is obtained, and since Ds and Df are known, when Ns is determined, equation (7) is obtained. Nf is determined from this, and K is determined from equation (6).

Also, from equations (1) and (5), we obtain the following equation, and then store and calculate this equation in the setting device 1 having a function generator.

Therefore, by setting two manual forces: (a) the rotational speed Ns at the start of winding and (b) the elapsed time t until reaching the assumed diameter Df, it is possible to calculate and output a control output that keeps the winding speed constant. Control according to this output may be performed using a feedback circuit.

Next, the wind ratio calculation is performed as follows.

The number of rotations of the take-up drum when the traverse arm moves one way over the distance of the traverse width is called the wind number W. The rotation speed of the traverse cam Nt and the number of rotations of the take-up drum N have a constant ratio as follows: 2Nt= eN (e is a constant)
-(9) Therefore, upon receiving the signal based on the formula 8 from the take-up shaft rotation speed setter 1, the wind ratio calculator calculates and outputs the traverse cam rotation speed Nt.

Next, the traverse arm departure speed is calculated as follows. Now, when the bobbin and the traverse arm are in the positional relationship as shown in FIG. 4, the following equation holds true.

Then, if the speed increase ratio from the pulse motor to the traverse arm support shaft is S, and the pulse motor rotates 1.8 degrees per pulse, then calculate α from equation 10 and substitute it into the above equation. For example, by substituting D from the first equation into this, the traverse departure speed calculation unit receives the N signal from the setting device 1 in the same way as above, and calculates and outputs the number of pulses P to the pulse motor. do.

A signal based on the speed Nt and the number of pulses P is sent to control the winding shaft rotation speed in the same way as the control of the winding shaft rotation speed.

Note that for the above equations (1) and (5), an approximate equation corresponding to equation (8) may be applied using an approximate equation close to each actual state. Instead of this combination, a DC motor or an AC servo system is used.

G. Effects As described above, the present invention stores a function representing the relationship between the rotational speed of the winding shaft and the winding time in order to keep the yarn winding speed constant in the winding shaft rotation speed setting device. By setting two inputs: the rotational speed at the start of winding and the elapsed time until the expected diameter is close to the maximum winding diameter, a control output that keeps the winding speed constant is calculated and output. Therefore, when winding yarn at a constant speed, feedback control is easily possible by inputting two inputs, the rotational speed at the start of winding and the winding time from the start of winding to the end of winding, to the rotation speed setting device. It became. Further, the traverse can be easily electrically controlled by the wind ratio calculator and the traverse departure speed calculator.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram of an embodiment of the present invention, Fig. 2 is an axial sectional view of a winding package, and Fig. 3 shows the relationship between the winding rotation speed N, the winding diameter, and the winding time T. The graph shown in FIG. 4 is an explanatory diagram of the traverse section. 1... Take-up shaft rotation speed setting device, 2... Take-up shaft rotation speed detector, 3... PID! I controller, 4... Inverter, 5... Take-up shaft drive motor Patent applicant: Shimadzu Corporation Agent Patent attorney: Shinpei Inukai, Attorney Patent attorney: Nori Nishi Keiichi, Attorney: Patent attorney Masa Motojo, Kebushi Figure 1, 2nd r! A

Claims (1)

[Claims] Rotational speed N of the winding shaft to keep the yarn winding speed constant
and a winding shaft rotation speed setting device in which a function in which the relationship between and winding time T is expressed as N=B{1/√(T)} is stored and calculated, and the setting device means for setting two inputs: a rotational speed at the start of winding and an elapsed time until the expected diameter is close to the maximum winding diameter, and receiving a signal from the winding shaft rotational speed setting device,
A wind ratio calculator calculates and outputs the traverse cam rotational speed Nt according to the formula eN (e is a constant), and receives the N signal from the setting device, P=h(1/N^2) (h is 1. A winding shaft rotation and traverse section drive speed control device for a glass fiber winder, comprising: a traverse takeoff speed calculator which calculates and outputs the number of pulses P to a pulse motor using the formula: