CN103708268A - Method for calculating rolling diameter - Google Patents

Abstract

The invention discloses a method for calculating a rolling diameter. The method comprises the following steps of 1) calculation and 2) comparison. According to the calculation, a, the rolling diameter is calculated according to the following rolling diameter calculating formula, V is linear speed m/s, i is the reduction ratio of a gearbox, n is the rotating speed rpm of a motor, and D1 is the rolling diameter; b, the rolling diameter is calculated through the following rolling diameter compensation calculating formula, D2=D0+/-2kh, wherein D0 is the rolling diameter of the last calculation period, h is the thickness of a rolling material, k is the number of unrolling or rolling turns in the calculation period, D2 is the rolling diameter, D2=D0-2kh in the unrolling process, and D2=D0+2kh in the rolling process. According to the comparison, the difference error delta of D1 and D2 is calculated and is equal to |D1-D2|, if the value of delta is smaller than a set value, the D1 is directly used as an output rolling diameter value, and if the value of delta is larger than the set value, D1-delta/2 is used as the unrolling output rolling diameter value, and D1+delta/2 is used as the rolling output rolling diameter value. The method for calculating the rolling diameter can effectively improve the calculating precision of the rolling diameter, tension fluctuation of a rolling machine due to the fact that a liner speed encoder slips can be effectively avoided, and the phenomenon that loose layers happen to an inner ring and an outer ring can be reduced.

Description

Coil diameter method of calculating

Technical field

The invention belongs to Strip and batch technical field, be specifically related to a kind of coil diameter method of calculating for computing board strip coiling and uncoiling process.

Background technology

The basis that function is controlled in the transmission of reeler is exactly that coil diameter is calculated, and no matter is that it is carried out to speed control or tension force control indirectly, and all only in coil diameter, calculating could normal work under correct prerequisite.And traditional coil diameter computing formula is:

$D=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity m/s; I is gear case reduction ratio; N is motor speed rpm; D is coil diameter.

Although this method of calculating can meet the calculation requirement of coil diameter to a certain extent, but, due to this account form the place one's entire reliance upon feedback of linear velocity, rotating speed coder and the setting thickness of band, can not well adapt to the on-the-spot condition of production complicated and changeable, such as skidding, the phenomenon such as the even coder pulse-losing of uneven thickness, these phenomenons all will greatly affect the precision of coil diameter calculating, and particularly the dynamic calculation precision that rises braking section at reeler can not get strong guarantee.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of coil diameter method of calculating, this coil diameter method of calculating can improve the design accuracy of coil diameter, and then improves the tension force control accuracy of reeler, solves at reeler and rises the defect of batching staggered floor that braking section easily produces.

For achieving the above object, the invention provides following technical scheme:

A coil diameter method of calculating, comprises the steps:

1) calculate:

A. utilize following coil diameter computing formula to calculate coil diameter:

$D_1=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity m/s; I is gear case reduction ratio; N is motor speed rpm; D ₁for coil diameter;

B. utilize following coil diameter compensation computing formula to calculate coil diameter:

D ₂=D ₀±2kh

Wherein, D ₀coil diameter for a upper computation period; H is coil thickness; K is uncoiling in this computation period or the number of turns of batching; D ₂for coil diameter;

When uncoiling, D ₂=D ₀-2kh, while batching, D ₂=D ₀+ 2kh;

2) relatively: calculate D ₁and D ₂difference error δ=| D ₁-D ₂|, if the value of δ is less than setting value, directly with D ₁for output coil diameter value; If the value of δ is greater than setting value, uncoiling is with D ₁, for output coil diameter value, batch with D-δ/2 ₁+ δ/2 are output coil diameter value.

Further, take uncoiling or batch a circle as computation period, i.e. a k=1.

Beneficial effect of the present invention is:

Coil diameter method of calculating of the present invention can effectively overcome skid, the phenomenon such as the even coder pulse-losing of uneven thickness calculates the error causing to coil diameter, and can effectively improve the design accuracy of coil diameter, the tension fluctuation that can effectively avoid reeler to skid and cause because of linear velocity coder, and can reduce Internal and external cycle pine layer phenomenon.

The specific embodiment

Below in conjunction with specific embodiment, the preferred embodiments of the present invention are described in detail.

The first embodiment

The step of the coil diameter method of calculating of the present embodiment uncoiling is as follows:

1) calculate:

A. utilize following coil diameter computing formula to calculate coil diameter:

$D_1=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity and equals 1m/s; I is gear case reduction ratio and is 6; N is motor speed and equals 6rpm; Calculate coil diameter D ₁for 19.0991m.

B. utilize following coil diameter compensation computing formula to calculate coil diameter:

D ₂=D ₀-2kh

Wherein, D ₀for the coil diameter of a upper computation period and equal 19.1061m; H is coil thickness and equals 5mm; The number of turns that k is uncoiling in this computation period also equals 1, and uncoiling one circle of should take is a computation period; Calculate coil diameter D ₂for 19.0961mm.

2) relatively: calculate D ₁and D ₂difference error δ=| D ₁-D ₂|=0.0030mm, error setting value is 2mm, and the value of δ is greater than setting value, and the output coil diameter value finally obtaining is D ₁-δ/2=19.0976m.

The coil diameter method of calculating of the present embodiment can effectively overcome skid, the phenomenon such as the even coder pulse-losing of uneven thickness calculates the error causing to coil diameter, and can effectively improve the design accuracy of coil diameter, the tension fluctuation that can effectively avoid reeler to skid and cause because of linear velocity coder, and can reduce Internal and external cycle pine layer phenomenon.

The second embodiment

The step of the coil diameter method of calculating of the present embodiment uncoiling is as follows:

1) calculate:

A. utilize following coil diameter computing formula to calculate coil diameter:

$D_1=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity and equals 1m/s; I is gear case reduction ratio and is 6; N is motor speed and equals 6rpm; Calculate coil diameter D ₁for 19.0991m.

B. utilize following coil diameter compensation computing formula to calculate coil diameter:

D ₂=D ₀-2kh

Wherein, D ₀for the coil diameter of a upper computation period and equal 19.1080m; H is coil thickness and equals 5mm; The number of turns that k is uncoiling in this computation period also equals 1, and uncoiling one circle of should take is a computation period; Calculate coil diameter D ₂for 19.0980mm.

2) relatively: calculate D ₁and D ₂difference error δ=| D ₁-D ₂|=0.0011mm, error setting value is 2mm, the value of δ is less than setting value, directly with D ₁=19.0991m is output coil diameter value.

The 3rd embodiment

The step of coil diameter method of calculating when the present embodiment batches is as follows:

1) calculate:

A. utilize following coil diameter computing formula to calculate coil diameter:

$D_1=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity and equals 1m/s; I is gear case reduction ratio and is 6; N is motor speed and equals 6rpm; Calculate coil diameter D ₁for 19.0991m.

B. utilize following coil diameter compensation computing formula to calculate coil diameter:

D ₂=D ₀+2kh

Wherein, D ₀for the coil diameter of a upper computation period and equal 19.0960m; H is coil thickness and equals 5mm; The number of turns that k is uncoiling in this computation period also equals 1, and uncoiling one circle of should take is a computation period; Calculate coil diameter D ₂for 19.0970mm.

2) relatively: calculate D ₁and D ₂difference error δ=| D ₁-D ₂|=0.0021mm, error setting value is 2mm, and the value of δ is greater than setting value, and the output coil diameter value finally obtaining is D ₁+ δ/2=19.1002m.

Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can to it, make various changes in the form and details, and not depart from the claims in the present invention book limited range.

Claims (2)

1. a coil diameter method of calculating, is characterized in that: comprise the steps:

1) calculate:

A. utilize following coil diameter computing formula to calculate coil diameter:

$D_1=\frac{V\×i\×60}{n\×\mathrm{\π}}$

Wherein, V is linear velocity m/s; I is gear case reduction ratio; N is motor speed rpm; D ₁for coil diameter;

B. utilize following coil diameter compensation computing formula to calculate coil diameter:

D ₂=D ₀±2kh

Wherein, D ₀coil diameter for a upper computation period; H is coil thickness; K is uncoiling in this computation period or the number of turns of batching; D ₂for coil diameter;

When uncoiling, D ₂=D ₀-2kh, while batching, D ₂=D ₀+ 2kh;

2) relatively: calculate D ₁and D ₂difference error δ=| D ₁-D ₂|, if the value of δ is less than setting value, directly with D ₁for output coil diameter value; If the value of δ is greater than setting value, uncoiling is with D ₁, for output coil diameter value, batch with D-δ/2 ₁+ δ/2 are output coil diameter value.

2. coil diameter method of calculating according to claim 1, is characterized in that: take uncoiling or batch a circle as computation period, i.e. a k=1.