JPH0262466B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for continuously bundling wire rods, and in particular,
The present invention relates to a continuous wire rod bundling method with improved deceleration instruction setting during continuous wire rod bundling.

[Prior art] A continuous bundle machine is installed at the latter stage of a line that manufactures wire rods such as electric wires, and during normal operation, it performs control such as deceleration → stop → cutting → acceleration during bundle collection, and then returns to the normal operating speed. The cycle of recovery is repeated. Speed control of this deceleration is related to the tension of the wire and the timing of cutting the wire in subsequent processing, and is an important point in continuous bundling. In addition, the timing of deceleration control is also determined in relation to the capacity (storage amount) of a device, such as an accumulator, that absorbs the speed difference caused by deceleration, if the speed at which the wire is fed from the wire manufacturing line is constant. .

Conventionally, in order to satisfy the above-mentioned conditions, a first counter that has a first setting that indicates the deceleration timing and a second counter that has a second setting that indicates the cutting timing are provided. The timing is carefully selected to ensure smooth continuous collection.

[Problems to be Solved by the Invention] However, the first setting and the second setting, that is, the timing of the deceleration time and the cutting time, are both controlled based on the preset bundle length of one bundle. ,1
When the bundle length of the bundle changes, it is necessary to reset both the first setting and the second setting. This is because the reduction ratio must be kept constant in order to make the bundling operation smooth. In order to reduce such resetting work, a counter is installed to set the difference between the first set value and the second set value to correct changes in the length of one bundle. It is. However, even when using a preset counter that sets the difference value, in order to keep the deceleration rate constant and the length of the bundle to be constant when the normal speed of the continuous bundle taker changes, the above-mentioned Both the first setting and the second setting will have to be reset. In other words, only in the case of the same stacking strip length and the same normal operating speed, smooth continuous stacking is possible by changing the set value of the counter that sets the difference value without changing the first set value and the second set value. However, in reality, various conditions change, so the task of finding the optimal conditions each time is done through a process of trial and error.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a continuous wire rod bundling method that can perform smooth continuous bundling simply by setting the bundling strip length of one bundle. It's about doing.

[Means and effects for solving the problems] In the method of the present invention, the acceleration is calculated from a set value for a constant normal speed given in advance as a deceleration instruction for the automatic bundling machine when collecting and bundling. Calculate the deceleration until the end of the remaining bundle length from the remaining bundle length and current speed in response to changes in the normal speed and the bundle length, and issue instructions according to the set value under the set conditions. This is what I decided to do.

[Example] Hereinafter, the method of the present invention will be explained in detail based on the drawings. As shown in FIG. 1, the method of the present invention causes the arithmetic processing section 5 to input a setting input 3 for the bundle length, a detection input 1 for the current speed, and a detection input 2 for the measuring strip length, respectively. At the same time, set the deceleration length 4
Based on these, the acceleration and deceleration until the end of the residual flux length are calculated, and the calculation output is sent to the judgment processing section 6.
If it is inappropriate, it issues a command to the arithmetic processing unit 5, and if it is appropriate, it issues a deceleration command to the stacking drive control unit 7 to decelerate the stacking motor. ing.

The current speed detection input 1 is for detecting the current speed using a rotation speed proportional generator such as a tacho generator and inputting it. The length is detected and inputted. Further, the setting input 3 for the bundle length is for inputting the value of the bundle length for one bundle.

The deceleration strip length setting 4 is set to 40 m from the bundled strip length setting value at a certain speed, for example, 10 m/sec.
If you want to decelerate in front of the vehicle, you only need to set a value of "40 [m]". This calculates the acceleration during deceleration.

In other words, acceleration is related to the first setting (deceleration length setting) and second setting (bundling length setting) that are valid only at a certain speed, and at the above-mentioned certain speed, deceleration starts at the first setting value and the second setting is effective only at a certain speed. It acts so that the speed is zero at the set value, that is, it stops. This acceleration has a negative magnitude, that is, the deceleration α is expressed by the following equation, where the square of a certain speed V ₀ is set as the first set value L 1 and the second set value L ₁
It is equal to dividing the difference value of the setting value L ₂ by twice.

A certain speed V ₀ (m/s) First set value L ₁ (m) Second set value L ₂ (m) Difference L (m) L = L ₂ −L ₁ Time t from the first setting to the second setting (s) If the negative acceleration is -α (m/s ² ), then the following formula holds: V ₀ -αt=0 L=V ₀ t-1/2αt ² ∴α=-V ₀ ² /2L The deceleration is It is determined as described above, and in the flowchart shown in Figure 1, a certain speed is set at the time of manufacturing, the first setting (deceleration strip length setting) is performed once, and then the second setting (bundling strip length setting) is performed. setting), the deceleration is calculated using the above calculation formula. In addition, if you memorize this deceleration from the next operation, you can set only the second setting (bundling strip length setting) to find the optimal deceleration start time based on the aforementioned deceleration, current speed, and measuring strip length. The length can be calculated.

The judgment processing section 6 judges whether or not the current length of the measuring strip from the measuring strip length detecting section has reached this optimum deceleration start length. A command is issued to the control unit 7 to start deceleration, and then a command is issued to cut the wire when the bundle length is reached (theoretically when the speed becomes zero) and to start the next bundle. put out. In other words, as shown in FIG. 2, this judgment processing unit 6 determines whether the meter length has reached the deceleration start length or not, and whether the meter length has reached the set value for the bundling length. is making two judgments.

In this way, the method of the present invention sets the deceleration instruction. To explain this in more detail, as mentioned above, when the speed is 10 m/sec, the deceleration is performed 40 m before the set value of the bundled strip length. If it is smooth, just set the deceleration length setting to 40 [m]. As a result, the acceleration during deceleration is calculated to be -1.25 m/sec ² , and when the length of the measuring strip reaches 40 m, a deceleration start command is issued, and the speed becomes zero after 8 seconds. The length of the strip between them is 10・8-1/2・(1.25)・8 ² = 40 [m] from the above calculation formula.

As a result, if the speed had become 20 m/sec, it would be decelerated 16 seconds ago, that is, when the bundled strip length was 160 m, and the acceleration would be -1.25 m/sec ² and become zero after 16 seconds, and the total strip length would be The settings will be correct.

Further, even if the length of the bundled strip changes, when it reaches the value calculated from the acceleration, if deceleration begins, the total length of the bundled strip and the acceleration always remain at the set value. This deceleration timing is output to the stacking drive control section 7, and the stacking motor is operated at the set deceleration (acceleration), so that the stacking operation can be performed in a timely manner.

In the above method, the current speed is detected in an analog manner, but it may also be detected digitally, and the measuring strip length can be detected by sending out a pulse signal for each unit strip length. You may also do so. Furthermore, instead of directly determining the value of the meter length, the value of the meter length can be calculated indirectly from the rotational speed of the bundling motor and the elapsed time.

In addition, the deceleration length setting is the first
In addition to setting the difference value between the preset value and the second preset value, it is also possible to directly detect the acceleration during deceleration, calculate an appropriate deceleration time based on this, and output a deceleration instruction. Furthermore, even if the wire rod is decelerated during bundle collection, the feeding speed of the wire does not change, and the difference is stored in an accumulator, etc., but there is a limit to the amount of wire stored, and this limit value is determined by the structure of the accumulator. It is a value. Therefore, by setting this limit value in advance, determining the necessary radiation storage amount from the current speed and deceleration, and comparing it with the limit value, the maximum allowable value for the current speed can also be determined. By operating at a value closer to the maximum allowable value determined in this way, the work efficiency of bundle collection can be improved, and since the accumulator is operated within the range of allowable storage amount, it may cause runaway and disconnection. This can prevent crosstalk, etc.

[Effects of the Invention] As described above, according to the present invention, even if the normal operating speed is varied, it is possible to automatically and smoothly perform continuous bundling work.

The conventional one uses a two-stage preset counter to constantly adjust the first setting (deceleration length setting) and second setting (bundle length setting) in response to changes in the speed of the wire manufacturing line (main line) and changes in the winding length. There is the trouble of having to re-set both the terms and conditions, and furthermore, this first setting often relies on empirical judgment.
Decisions were often made through trial and error. As stated at the beginning of the specification, the reason for this is the tension on the wire rod (affected by deceleration), and work efficiency (reducing deceleration reduces the change in tension on the wire rod, but
This is because the time and amount of accumulated radiation must be large during that time, which causes problems (reduction in efficiency).

In this regard, according to the present invention, even if the set value of the bundled strip length is changed, the timing for deceleration is automatically calculated, so it is recommended to set the bundled strip length setting and the number of bundled strips in advance. For example, by changing the length of one bundle at a continuous point and setting the number of bundles to be taken, a remarkable effect is exhibited in that the bundle can be continuously taken at the desired length.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing an example of the method of the present invention, and FIG. 2 is a more detailed flowchart of the determination processing section in FIG. 1. 1...Current speed input, 2...Measure length input, 3
...Bundling strip length setting input (for one bundle), 4...Deceleration strip length setting (at a certain speed), 5... Arithmetic processing unit, 6
. . . Judgment processing unit, 7 . . . Bundling drive control.

Claims (1)

[Scope of Claims] 1. In response to changes in the normal operating speed, which is variable in synchronization with the operating speed of the main line, a deceleration instruction strip length setting value only at a predetermined constant speed and a full strip length value are provided. means for calculating the deceleration from the above-mentioned deceleration; and means for calculating the optimum value of the deceleration instruction from the normal operating speed and the full length value for which the conditions for determining the deceleration are changed; A method for continuously bundling wire rods, characterized by giving instructions for decelerating the time.