KR20020051196A - Automatic winding control method of bead wire - Google Patents

Abstract

PURPOSE: A method for controlling automatic winding of a bead wire is provided which always enables a constant shape of winding regardless of types of bobbins by enabling automatic sensing of a bobbin flange due to an optical sensor and controlling of a side to side moving change time. CONSTITUTION: The method for controlling automatic winding of a bead wire comprises the steps of selecting a bobbin winding the bead wire(60); inputting a basic set value required for controlling a traverser(61); carrying out an initial running of the traverser corresponding to n1 cycles of the basic set value(62); calculating an initial average running time of the traverser(63); calculating a left/right running time(T1) or a right/left running time(T2) of the traverser using the initial average running time of the traverser, a traverser left/right changing required time(t1) or a traverser right/left moving changing required time(t2), a traverser moving changing time increment(t3), a bobbin winding time(T0) and a winding lapse time automatically measured in a control part(64); controlling the traverser according to the left/right running time(T1) or the right/left running time(T2) of the traverser(65).

Description

Automatic winding control method of bead wire}

The present invention relates to a device for automatically winding a bead wire used for reinforcing a bead portion of a vehicle tire, and more particularly, in order to wind the bead wire to a bobbin mounted on a winder, the bobbin is in contact with the bead wire. Good winding is achieved by controlling the movement direction change time of the traverser that is generated when the winding guide traverser reciprocates left and right by the winding width so as not to disturb the winding form of the bead wire wound around the side surface of the bobbin flange. It relates to a bead wire automatic winding control method to obtain a form.

In general, as shown in FIG. 1, a tire for a vehicle includes a bead part B closely coupled to an outer circumferential surface of a rim part of a car wheel, a tread part T directly contacting a road surface during driving, It consists of a shoulder part (S) and a side wall part (C) which connect the bead part and the tread part and serve as a side wall of the tire, and a steel cord 1 is embedded in the tread part to reinforce the tire having the above shape. The bead wire is a bead wire 11 (bead wire), which is a bead reinforcing steel wire, and a carcass 12 is embedded along the entire tire cross section.

The bead portion, which is in close contact with the wheel, becomes more important as the performance of the vehicle is improved. That is, since the vehicle is speeded up with the performance improvement of the vehicle and the deformation force applied to the tire is increased during high-speed driving, in particular, the high-speed rotation, the force that the tire tries to detach from the wheel is concentrated on the bead part. The resistance becomes more important than anything else, and the importance of the bead wire reinforcing the bead portion becomes even greater.

Therefore, the bead wire must have a good bonding force with the tire bead portion rubber and at the same time have a large bending force in order to increase adhesion with the wheel. For this reason, the bead wire is manufactured by carrying out bronze plating which is chemical plating using the solution which mixed the high sulfate wire rod with the tin sulfate solution and the copper sulfate solution in the suitable ratio on the surface of fresh steel wire.

Since the bead wire manufactured as described above is very important to manage the adhesion amount on the surface of the steel wire to prevent the bonding force and the corrosion resistance of the bead portion rubber, when the fresh wire is added to the bronze plating process, which is the final process of the bead wire, The steel wire passing through the plating bath proceeds without stopping at a constant speed and is wound around the bobbin mounted on the winder, and the portion where the moving speed in the plating bath exceeds the allowable range or is stopped is treated badly.

That is, the bead wire wound after bronze plating should be wound so that the progress of the bead wire does not stop as it is used as a product, and the winding quality directly affecting the final quality of the bead wire product is also very important.

If the winding of the bead wire is poor, the bead wire becomes tangled or disconnection occurs when unsealing in order to use the bead wire, the damage to the bead wire can not be used, the conventional winding method is as follows. .

2 is a block diagram of a conventional bead wire winding device.

As shown in the drawing, the bead wire B, which has been chemically plated, has an outer circumferential surface of the winding part 23B via a traverser 21 which is connected to the winder drive unit 25 by a belt V and driven left and right. Wound in P) and wound around the bobbin 23 mounted on the winder 22, the traverser 21 is a proximity limit switch 24A (24B) opened by the distance between the bobbin flange 23C. ) The left and right movements are changed.

The winding method according to the conventional winding device configured as described above has the following problems.

When the traverser is in contact with the proximity limit switches 24A and 24B and the direction of travel is changed, it is not necessary to take time at the moment when the left and right travel directions are changed mechanically, ignoring the moment of stop by the inertia force. That is, since the traverser that has moved left moves to the right as soon as it contacts the proximity limit switch on one side, the bobbin is slightly ahead of the position of the traverser that guides the bead wire to the bobbin rather than the position of the bead wire wound on the bobbin. Not only does the bead wire not proceed to the flange side, but also the winding amount at the time of turning direction, that is, the winding amount of the bead wire wound on the bobbin flange side part is smaller than the winding amount wound on the other bobbin winding part. The winding form of the adjacent side of the flange is disturbed.

In particular, a gap is formed between the inner wrapping paper P surrounding the outer circumferential surface of the winding portion 23B of the bobbin and the inner surface of the bobbin flange 23C, and the winding form is wound as the bead wire enters the gap so that the winding form is not preferable. Will not.

Therefore, in the conventional winding device, there is a difficulty in changing the position of the proximity limit switch from time to time appropriately to change the moving direction of the traverser.

In addition, since the advancing speed of the bead wire is constant and the winding diameter increases as the winding proceeds, the winding speed gradually decreases. Therefore, as the winding progresses, there is a problem in that the difference in the winding amount between the portion that is in contact with the bobbin flange and the portion that is not is larger.

In addition, according to the bobbin, as the winding progresses, the phenomenon occurs that the bobbin flange spreads outward, and when such bobbins are used, the above problem becomes more serious, and the spacing between the bobbin flanges is different each time a bobbin is used. There is an inconvenience in that the position of the limit switch must be changed manually.

Accordingly, the present invention is to solve various problems exhibited in the winding method using the conventional bead wire winding apparatus, and it is possible to automatically detect the bobbin flange by the optical sensor and to control the left and right movement conversion time so as to relate to the type of bobbin. It is an object of the present invention to provide an automatic winding control method of a bead wire that can always be wound in a certain form without.

1 is a partial cutaway perspective view of a tire;

2 is a schematic structural diagram of a conventional bead wire winding apparatus;

3 is a schematic structural diagram of a bead wire winding apparatus for implementing the method of the present invention.

4 is a control flow diagram of the method of the present invention.

5 is a cross-sectional view of the winding bobbin.

6 is a control flowchart of the method of the present invention.

((Explanation of symbols for main part of drawing))

1.steel cord 11.bead wire

12.Carcass 21.Traverser

22. Winding machine 23. Bobbin

24. Proximity switch 25. Winder drive

The object of the present invention is achieved by a light sensor mounted on the left and right moving body of the traverser and a control unit controlling the movement of the traverser by calculating the time when the traverser stops when the left and right movements of the traverse are changed.

The bead wire winding apparatus for carrying out the method of the present invention are all three optical sensors are installed, two are mounted on the traverser body to detect both bobbin flanges, one is in the traverser's movement path It is fixedly installed in close proximity to detect the number of round trips of the traverser.

The controller controls the movement of the traverser. The signals and data input thereto include a bobbin flange detection signal, a number of round trips of the traverser, and various basic setting values necessary for calculating the traverser control signal.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

3 shows a schematic configuration diagram of a bead wire winding apparatus in which the method of the present invention is performed.

As shown in the drawing, the bead wire winding device is connected to the winder 22 to which the bobbin 23 is mounted and the winder drive unit 25 by a belt V to be driven left and right, and has two left and right optical sensors S1. (S2) is mounted on the traverser 21, two proximity switches 24 and the optical sensor (S3) provided in close proximity to the movement path of the traverser 21, and the electrical Consists of a control unit (not shown) connected to the two, the two proximity switch 24 is an auxiliary device used when manually winding the bead wire when an error occurs in the automatic control method of the present invention.

As shown in FIG. 4, the controller for controlling the operation of the traverser 21 calculates signals from the sensors S1, S2, and S3 and various input data to the traverser 21. It consists of a central processing unit (40A) for outputting a control signal and a data input unit (40B) for inputting the basic setting values of the traverser required for the control value calculation for the operation of the traverser, the basic input to the data input unit (40B) The settings are as follows.

The initial number of traversers (n ₁ ) is the number of movements of the traversers that are immediately changed in direction without the time required to change the direction when the traverser moves left and right. It is also the number of windings to immediately change the direction of movement of the rod so that it is not wound to the bobbin flange side.

The reason for the above is that, as shown in FIG. 5, the welding portion W is formed on the contact portion of the bobbin flange 23C and the bobbin winding portion 23B to be convex, and the outer circumferential surface of the bobbin winding portion 23B is wrapped. When wrapped up to the side of the bobbin flange 23C, the bead wire is wound along the surface of the weld portion W through the gap between the wrapping paper P and the bobbin flange 23C, or is welded (W). This is to prevent winding of the welded portion W while the height of the outermost layer wound layer becomes approximately the same as that of the welded portion W, because the winding shape of the coil) is larger than that of other parts.

The average number of times for determining the running time (n ₂ ) is the number of times of operation of the calculation target of the traverser for calculating the average one-way movement time of the traverser, which is in reverse order from the last number of the initial number of traversers (n ₁ ). This means that the initial traverse travel time corresponding to the number n ₂ is the target of the average travel time calculation. That is, when n ₁ is 10, n ₂ is 3 times, 3 times of n ₂ corresponds to 8 to 10 times of n _1, the average travel time is divided by the average of 8 to 10 hours with three conference station .

The time required to change the traverser's left / right or right / left movements (t ₁ ) (t ₂ ) is the time taken from the time when the optical sensor mounted on the traverser detects the bobbin flange to change the traverse direction of the traverse. In this case, the input value of 3 seconds means that it takes 3 seconds to move in the same direction even after detecting the bobbin flange.

The traverser movement change time increase value t ₃ is the rotation speed of the traverse and the winding bobbin as the winding amount increases, so the traverser left / right or right / left movement change time required t ₁ (t ₂ ). This should increase proportionally, which means the total time to increase. Therefore, the change time t ₁ (t ₂ ) must be increased from the first t ₁ and t ₂ to t ₁ + t ₃ and t ₂ + t ₃ , respectively, and the increase is dependent on the winding up time. Proportional to That is, the traverser movement change time is gradually increased by the slope of t ₃ × (winding up time / 1 bobbin winding time) as the winding progresses at t ₁ , t ₂ , and finally t ₁ + t ₃ , t ₂ + t ₃ becomes

The bobbin selection is to select the type of bobbin, one of four kinds of bobbin can be selected, and the data for the other reference setting values are different depending on the selected bobbin.

1 bobbin winding time (T ₀ ) refers to the average time used for winding of 1 bobbin, which is almost a constant time due to the characteristics of the final winding work of the bead wire, which always proceeds under constant working conditions.

The output values used for controlling the traverser by calculating the basic set values are the traverser left / right or right / left travel time T ₁ (T ₂ ), which are calculated by the following equations ( ₁ ) and ( ₂ ).

In the above two equations, t ₀ is the initial average running time of the traverser calculated by the n ₂ and the initial every running time automatically measured by the controller.

The automatic bead wire winding control method of the present invention based on the above-described control flow chart of FIG. 6 is as follows.

Control method of the present invention, and step 61 to step 60 to select the bobbin to wind the bead wire, enter the default settings required for the traverse control, n steps, the initial station made up a _single traversal (62 Calculating the initial average travel time of the traverser, the initial average travel time of the traverser and the time required to change the traverser left / right or right / left movement (t ₁ ) (t ₂ ) up movement to change the time increment (t ₃₎ of the first bobbin take-up time (t ₀₎ and left / right naejineun right / left driving time of traversal up by the take-up over time is measured automatically by the control unit (t ₁₎ (t ₂₎ Comprising a step (64), and controlling the traverser according to the left / right or right / left running time (T ₁ ) (T ₂ ) of the traverser.

As described above, the bead wire automatic winding control method of the present invention is particularly effective in improving the winding shape of the bobbin flange side part, and the overall winding shape is uniform since it changes the time of changing the direction of movement of the traverser appropriately. When the bead wire is unsealed, the bead wire is prevented from being shrunk or broken.

In addition, when the distance between bobbin flanges, that is, the bobbin width is changed to a bobbin of a different type, it is not only necessary to manually correct the position of a proximity sensor that detects the traverse movement width, but also hassle to correct various working conditions. Without any type of bobbin selected from the control unit, the winding is made in the most suitable way for the bobbin. Therefore, it is expected to improve the winding quality and increase the productivity significantly.

Claims (2)

Selecting a bobbin to wind the bead wire (60), inputting a basic setting value for controlling the traverser (61), and performing a traverser initial operation corresponding to n _one time of the basic setting value ( 62), calculating the initial average travel time of the traverser (63), the initial average travel time of the traverser and the time required to change the traverser left / right or right / left movement (t ₁ ) (t ₂ ) The traverser's left / right or right / left running time (T ₁ ) (T ₂ ) using the increase in the changeover time of the traverser (t ₃ ), the bobbin winding time (T ₀ ) and the elapsed winding time automatically measured by the controller. ) And step (65) of controlling the traverser according to the left / right or right / left travel time (T ₁ ) (T ₂ ) of the traverser. Control method. The method of claim 1, wherein the traversal of the document left / right naejineun right / left travel time (T ₁₎ (T ₂₎ is automatically wound around the bead wire to a control method characterized in that operation by the following equation. Equation , In the above equation, t ₀ is the initial average travel time of the traverser, t ₁ is the time required to change the traverser left / right movement, t ₂ is the time required to change the traverser right / left movement, t ₃ is the increase in the time of the traverser movement change T ₀ is 1 bobbin winding time.