CN103372582B - Ultrathin strip steel coiling equipment and method - Google Patents

Abstract

The invention discloses ultrathin strip steel coiling equipment which comprises a coiling machine, a compression roller device and a driving device, wherein an L-shaped mechanical arm is used as the compression roller device, and one end of the compression roller device is fixed above the rear side of the coiling machine and serves as the rotating center of the compression roller device; the driving device is arranged on the rear side of the coiling machine, is connected with the rotating center of the compression roller device and drives the compression roller device to rotate around the rotating center. The invention also provides an ultrathin strip steel coiling method which comprises the following steps of: collecting equipment parameters of a winding drum and a compression roller; collecting characteristic parameters of strip steel; giving various working condition coefficients; calculating the lifting position of the compression roller; defining parameters in a coiling process, and giving the maximum coiling radius; calculating the coiling radius; judging the position of the compression roller; judging whether the coiling radius is less than or equal to the difference obtained by subtracting the thickness of the strip steel from the maximum coiling radius. The invention provides a coiling method and equipment suitable for ultrathin strip steel, and the coiling quality of the strip steel can be effectively improved.

Description

The method for coiling of paper-thin strip

Technical field

The present invention relates to cold rolling technology field, more particularly, relate to a kind of taking-up equipment and method of paper-thin strip.

Background technology

The product specification that secondary cold-rolling unit is produced is thinner, and the most thin product thickness of smooth Model Products can reach 0.15mm, and secondary cold-rolling Model Products is the thinnest can reach 0.05mm.For paper-thin strip, in actual production process except rolling the defects such as thin difficulty, plate shape is bad, performance is not up to standard, surface quality is defective, batching defect is also an another one difficult problem in paper-thin strip production process, belongs to the emphasis of on-the-spot tackling key problem.In the production process of paper-thin strip, typically batch defect and just comprise band steel fold cramp etc.Batch cramp defect for what generally occur in coil of strip inner core, in coiling process, if there is batching cramp problem, band steel must cancel excision, causes the reduction of band steel lumber recovery, thus causes larger economic loss to scene.

In the past, on-the-spot in order to overcome strip coiling defect, ensure reeling quality, prevent the phenomenons such as coil of strip generating strap steel fold cramp, to 10% ~ 30% be increased batching coiling tension at first, make coil of strip inner core form similar " sleeve " hard sandwich layer, along with the carrying out of batching, coiling tension drops to given working tension gradually, like this, tension force defines certain tapering, and be called " tapering coiling tension ", the relation of tapering coiling tension and coil of strip diameter as shown in Figure 1.Wherein, taper tension recovery point computational methods are generally strip coiling diameter when calculate entrance coil of strip weight 10%, and coiling tension returns to the coiling tension value of normal setting at this point.

The band steel that aforesaid way is greater than 0.18mm for thickness has certain effect, but when belt steel thickness is lower than 0.18mm, strip coiling and starting very difficult, now still adopt the method optimizing coiling tension cannot solve the problems such as band steel fold cramp, often need repeatedly to excise and batch bad band steel, had a strong impact on production efficiency.

Summary of the invention

Object of the present invention aims to provide a kind of taking-up equipment and method of paper-thin strip, solves the various deficiencies existed in prior art.

According to the present invention, provide a kind of taking-up equipment of paper-thin strip, comprise coiling machine, press-roller device and drive unit.Press-roller device is L shape mechanical arm, and the back side top of coiling machine is fixed in its one end, as the pivot of press-roller device.Drive unit is arranged at the rear side of coiling machine, and is connected with the pivot of press-roller device, drives press-roller device to rotate around pivot.

According to one embodiment of the invention, the overbending direction of L shape mechanical arm is towards the drum center of coiling machine.

According to one embodiment of the invention, the taking-up equipment of paper-thin strip also comprises S roller and lower S roller.Upper S roller is arranged at directly over lower S roller, and the line at the center of the center of upper S roller and lower S roller is perpendicular to horizontal plane.The bottom of lower S roller is higher than the drum center of coiling machine.

According to one embodiment of the invention, drive unit is hydraulic cylinder.

According to a further aspect in the invention, a kind of method for coiling of paper-thin strip is provided, comprises the following steps: the device parameter collecting reel and pressure roller; The characteristic parameter of collecting belt steel; Given all kinds of application factor; Calculate the cocked position of pressure roller; Definition coiling process parameter, and given maximum reeling radius; Calculate reeling radius; Judge pressure roller position; Judge whether reeling radius is less than or equal to the difference that maximum reeling radius deducts belt steel thickness.

According to one embodiment of the invention, reel parameter comprises coiler mandrel external diameter R ₀, pressure roller diameter is d _y, the radius of turn of pressure roller is R _zy, the pivot of pressure roller and the vertical range at coiler mandrel center be l _oa, horizontal range is the diameter d of upper S roller _ss, lower S roller diameter d _sx, upper S roller top and coiling machine the vertical range l of drum center _fd, be l with the vertical range of the drum center of coiling machine bottom lower S roller _cd, up and down S roller and coiler mandrel center horizontal range characteristic parameter with steel comprises thickness h, the width b of band steel, the band steel yield limit σ of band steel _s, band steel elastic modulus E.Application factor comprises the application factor ψ of pressure roller power application factor ξ, pressure roller cocked position ₁, ψ ₂.

According to one embodiment of the invention, the computing formula of pressure roller cocked position is

According to one embodiment of the invention, the computing formula of reeling radius is R=R ₀+ kh, wherein k represents that band steel has been wrapped coiling machine k and enclosed.

According to one embodiment of the invention, the computing formula of pressure roller position control angle β is

$\mathrm{\β}={\mathrm{\β}}_1+{\mathrm{\β}}_2=\arcsin \left(\frac{l_{o_{1}a}}{\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right)+\arccos \left(\frac{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2+R_{\mathrm{zy}}^2-{(R+\frac{d_y}{2})}^2}{{2R}_{\mathrm{zy}}\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right),$

Wherein, β ₁for the drum center of described coiling machine and the line of the pivot of pressure roller and angle, the β in plumb line direction ₂for the pivot of minimum steel band situation lower compression roller center and the line of described pressure roller pivot and the drum center of described coiling machine and described pressure roller line between angle.

According to one embodiment of the invention, judging whether reeling radius is less than or equal to the formula that maximum reeling radius deducts the difference of belt steel thickness is R≤R _max-h, wherein R _maxfor maximum reeling radius.

Have employed technical scheme of the present invention, start with from equipment and technology two aspect, propose a set of method for coiling and the equipment that are suitable for paper-thin strip, adopt the new press-roller device configuring position adjustable, cornerite above coiling machine, and by reasonably controlling pressure roller position angle, batching the method such as cornerite and platen pressure, the reeling quality of band steel effectively can be improved.

Accompanying drawing explanation

In the present invention, identical Reference numeral represents identical feature all the time, wherein:

Fig. 1 is the relation of tapering coiling tension and coil of strip diameter in prior art;

Fig. 2 is the structural representation of the taking-up equipment of paper-thin strip of the present invention;

Fig. 3 is the flow chart of the method for coiling of paper-thin strip of the present invention;

Fig. 4 is the schematic diagram of press-roller device when extreme position of Fig. 2;

Fig. 5 is the schematic diagram of press-roller device when general position of Fig. 2;

Partial enlarged drawing when Fig. 6 is contacting of drum center and the press-roller device of the coiling machine of Fig. 2.

Detailed description of the invention

Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.

As shown in Figure 2, in order to realize object of the present invention, improving reeling quality, the invention provides a kind of taking-up equipment of paper-thin strip, comprise coiling machine 1, press-roller device 2, upper S roller 3, lower S roller 4 and drive unit 5.

Above coiling machine 1, configure press-roller device 2, press-roller device 2 is L shape mechanical arm, and the back side top of coiling machine 1 is fixed in its one end, and as the pivot O of press-roller device 2, and the overbending direction of L shape mechanical arm is towards the drum center O of coiling machine ₁, the center of the other end of press-roller device 2 is O ₂.

The diameter of press-roller device 2 is d _y, the radius of turn of pressure roller is R _zy, the vertical range of the pivot of press-roller device 2 and the drum center of coiling machine 1 is l _oa, horizontal range is

Meanwhile, in fig. 2, upper S roller 3 is arranged at directly over lower S roller 4, and the line at the center of the center of upper S roller 3 and lower S roller 4 is perpendicular to horizontal plane.The bottom of lower S roller 4 is higher than the drum center O of coiling machine 1 ₁.

Simultaneously with reference to figure 4 and Fig. 5, the diameter d of upper S roller 3 _ssrepresent, the diameter d of lower S roller 4 _sxrepresent, α represent batch angle, β represents pressure roller position control angle, the vertical range of the drum center of upper S roller 3 top and coiling machine 1 is l _fd, be l with the vertical range of the drum center of coiling machine 1 bottom lower S roller 4 _cd, upper S roller 3, lower S roller 4 with the horizontal range of the drum center of coiling machine 1 be bottom lower S roller 4 with the air line distance of the drum center of coiling machine 1 be

Be simultaneously the bottom position of lower S roller 4 with reference to figure 4 and Fig. 5, C, D be immediately below lower S roller 4, and the drum center O of coiling machine 1 ₁be in the position of same level line; A be press-roller device 2 pivot O immediately below, with the drum center O of coiling machine 1 ₁be in the position of same level line; E is O ₁on D line segment a bit, in order to represent distance l _fd.In the diagram, φ _minand φ _maxminimum, maximum coil of strip diameter respectively.

Drive unit 5 is arranged at the rear side of coiling machine 1, and is connected with the pivot of press-roller device 2, drives press-roller device 2 to rotate around pivot O, and compresses coil of strip.As a kind of preferred embodiment of the present invention, drive unit 5 is preferably hydraulic cylinder, but not getting rid of drive unit 5 adopts other alternative structures such as lever.

With reference to Fig. 3, employ the taking-up equipment of the paper-thin strip of the present invention of Fig. 2, the method for coiling of corresponding paper-thin strip as shown in Figure 3:

Step 301: start.

Step 302: the device parameter collecting coiler mandrel and pressure roller, mainly comprises outside barrel diameter R ₀=508mm, pressure roller diameter are d _y=160mm, the radius of turn of pressure roller is R _zythe vertical range of the pivot of=1420mm, pressure roller and the drum center of coiling machine is l _oa=1545mm, horizontal range are the diameter d of upper S roller _ss=610mm, lower S roller diameter d _sxthe vertical range l at=610mm, upper S roller top and coiler mandrel center _fdbe l with the vertical range of the drum center of coiling machine bottom=1270mm, lower S roller _cdthe horizontal range of=50mm, up and down S roller and coiler mandrel center $l_{o_{1}d}=2200\mathrm{mm}.$

Step 303: the characteristic parameter of collecting belt steel, mainly comprises the thickness h=0.15mm of band steel, the width b=900mm of band steel, band steel yield limit σ _selastic modulus E=the 2.1*10 of=400Mpa, band steel ⁵mpa.

Step 304: given all kinds of application factor, mainly comprises the application factor ψ of pressure roller power application factor ξ=1.0, pressure roller cocked position ₁=1.6, ψ ₂=0.6.

Step 305: utilize formula calculate pressure roller cocked position R _t=1207.1mm.

Step 306: pressure roller pressure when batching beginning, band steel batches on coiling machine, definition coiling process parameter k (namely k represents that band steel has been wrapped coiling machine k and enclosed), given maximum reeling radius R _max=1750mm, and make k=1.

Step 307: calculating reeling radius R is R=R ₀+ kh=508.15mm.

Step 308: judge inequality R≤R _tset up? if inequality is set up, then pressure roller is with to batch, pressure roller position control angle $\mathrm{\β}={\mathrm{\β}}_1+{\mathrm{\β}}_2=\arcsin \left(\frac{l_{o_{1}a}}{\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right)+\arccos \left(\frac{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2+R_{\mathrm{zy}}^2-{(R+\frac{d_y}{2})}^2}{{2R}_{\mathrm{zy}}\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right),$ Batch angle , platen pressure proceed to step 309.If inequality is false, then pressure roller lifts, and proceeds to step 309.Wherein, M _{bullet, moulds}be under the effect of pressure roller thrust, bending moment value moulded by band bullet that steel produces, and h ₁for elastic region Partial Height on band steel cross section, $h_1=\frac{{\mathrm{\σ}}_s\×2R}{E}.$

Step 309: judge inequality R≤R _maxdoes-h set up? if set up, then make k=k+1, proceed to step 307.Otherwise, proceed to step 310;

Step 310: terminate to batch.

With reference to figure 4 and Fig. 5, in conjunction with above-mentioned each parameter, provide the collocation method of press-roller device 2 of the present invention:

the determination at pressure roller position control angle

In order to solve pressure roller position control angle β, first β must be solved ₁, β ₁for AO and OO ₁the angle of line.

As shown in Figure 5, according to geometric knowledge, at Δ AOO ₁in, have:

$\sin \left({\mathrm{\β}}_1\right)=\frac{{\mathrm{AO}}_1}{{\mathrm{OO}}_1}=\frac{600}{\sqrt{{1545}^2+{600}^2}}=0.362---\left(1\right)$

From formula (1):

β ₁＝31.19° (2)

Then, β is solved ₂, β ₂oO ₁and OO ₂the angle of line.

At Δ BOO ₁in, according to the cosine law, have:

${\mathrm{\β}}_2=\arccos \left(\frac{{\mathrm{OO}}_1^2+{\mathrm{OO}}_2^2-O_1{O}_2^2}{{2\mathrm{OO}}_1\·{\mathrm{OO}}_2}\right)---\left(3\right)$

Wherein:

${\mathrm{OO}}_1=\sqrt{{1545}^2+{600}^2}=1657.42---\left(4\right)$

OO ₂＝1420 (5)

O ₁O ₂＝R+80 (6)

Formula (4) to (6) is substituted into formula (3) obtain:

$\begin{array}{c}{\mathrm{\β}}_2=\arccos \left(\frac{{\mathrm{OO}}_1^2+{\mathrm{OO}}_2^2-O_1{O}_2^2}{{2\mathrm{OO}}_1\·{\mathrm{OO}}_2}\right)\\ =\arccos \left(\frac{{1657.42}^2+{1420}^2-{(R+80)}^2}{2\·1657.42\·1420}\right)\\ =\arccos \left(\frac{4757041-R^2-160R}{4707073}\right)\end{array}---\left(7\right)$

Finally, pressure roller position control angle is obtained:

batch angle control method

As shown in Figure 5 and Figure 6, batching angle α to solve, first must solve α ₁.In Figure 5, B point is the drum center O of coiling machine ₁with the movable end center O of press-roller device ₂contact point.Batching angle α is O ₁o ₂at the tangent line of B point and the angle of BC line, α ₁o ₁o and O ₁the angle of A.

According to geometric knowledge, at Δ AOO ₁in, have:

$\cos \left({\mathrm{\α}}_1\right)=\frac{{\mathrm{AO}}_1}{{\mathrm{OO}}_1}=\frac{600}{\sqrt{{1545}^2+{600}^2}}=0.362---\left(9\right)$

From formula (9):

α ₁＝68.81° (10)

Then, α is solved ₂, α ₂o ₁o and O ₁o ₂angle.

At Δ BOO ₁in, according to the cosine law, have:

$\begin{array}{c}{\mathrm{\α}}_2=\arccos \left(\frac{{\mathrm{OO}}_1^2+O_1{O}_2^2-{\mathrm{OO}}_2^2}{{2\mathrm{OO}}_1\·O_1{O}_2}\right)\\ =\arccos \left(\frac{{1657.42}^2+{(R+80)}^2-{1420}^2}{2\·1657.42\·(R+80)}\right)\\ =\arccos \left(\frac{R^2+160R+737041.1}{3314.84R+265187.2}\right)\end{array}---\left(11\right)$

Subsequently, α is solved ₄, α ₄cO ₁and O ₁the angle of D.

At Δ CO ₁in D, according to the cosine law, have:

${\mathrm{\α}}_4=\arcsin \left(\frac{\mathrm{CD}}{O_{1}C}\right)---\left(12\right)$

Wherein CD=1270-610*2=50

$O_{1}C=\sqrt{O_1{D}^2+{\mathrm{CD}}^2}=\sqrt{{2200}^2+{50}^2}=2200.568---\left(14\right)$

Formula (13), (14) are substituted into formula (12) and obtain:

Solve α again ₃, α ₃o ₁o ₂and O ₁the angle of C.Like this, α ₃can represent with following formula:

At Δ O ₁in BC, can be known by the cosine law

Like this, at Δ O ₁have in BC

Arrange:

platen pressure establishing method

According to research, pressure roller power P can adopt model as shown in Figure 6:

$P=\frac{\mathrm{\ξ}}{12R\sin \mathrm{\α}}({3h}^2-h_1^2)b{\mathrm{\σ}}_s---\left(20\right)$

In formula: ξ-application factor, in the present embodiment, get ξ=1.0;

σ _s-band steel yield limit, in the present embodiment, selects σ _s=400Mpa;

H ₁elastic region Partial Height on-band steel cross section, namely

H-belt steel thickness, in the present embodiment h=0.15mm;

B-strip width, in the present embodiment b=900mm;

E-band steel elastic modelling quantity, E=2.1*10 in the present embodiment ⁵mpa.

pressure roller cocked position defining method

For Thin Strip Steel, in order to ensure reeling quality in coiling process, pressure roller is not that entire volume all press against, but unclamps after being wound to certain diameter.Cocked position is for control reeling quality and important: if lifted too early, can not ensure reeling quality, and lifts and can increase coiling power evening first, second can because of because platen pressure is less, pressure roller is unstable and occur cut at belt steel surface.For pressure roller cocked position, then main relevant with belt steel thickness and coiler mandrel radius: belt steel thickness is less, and cocked position is more late; Reel radius is larger, and cocked position more early.Follow the tracks of and theory analysis through a large amount of scenes, provide following computational methods:

$R_t=\frac{{\mathrm{\ψ}}_1{R}_0}{e^{{\mathrm{\ψ}}_{2}h}}=\frac{2.6*508}{e^{0.6*0.15}}=1207.1---\left(21\right)$

In formula: R _t-pressure roller cocked position;

R ₀-coiler mandrel external diameter, in the present embodiment R ₀=508mm;

H-belt steel thickness, in the present embodiment h=0.15mm;

ψ ₁, ψ ₂the application factor of-pressure roller cocked position, in the present embodiment ψ ₁=2.6, ψ ₂=0.6

Compared with conventional spool press-roller device, press-roller device of the present invention both can adjust platen pressure, pressure roller position and cornerite can be adjusted again, thus not only can ensure stable to batch, realize not occurring in strip coiling process skidding, and effectively can administer the reeling quality problems such as band steel fold cramp.Especially, the relevant paper-thin strip batching device and method and be not only applicable to below 0.18mm of the present invention, and the band steel of applicable more than 0.18mm, strong adaptability.

Those of ordinary skill in the art will be appreciated that, above description is only one or more embodiments in the numerous embodiment of the present invention, and is not used as limitation of the invention.Any equalization for the above embodiment changes, modification and the equivalent technical scheme such as to substitute, as long as spirit according to the invention, all will drop in scope that claims of the present invention protect.

Claims (1)

1. a method for coiling for paper-thin strip, is characterized in that, comprises the following steps:

Collect the device parameter of reel and pressure roller, the device parameter of described reel and pressure roller comprises:

Coiler mandrel external diameter R ₀, pressure roller diameter is d _y, the radius of turn of pressure roller is R _zy, the pivot of pressure roller and the vertical range at coiler mandrel center be l _oa, horizontal range is the diameter d of upper S roller _ss, lower S roller diameter d _sx, upper S roller top and coiling machine the vertical range l of drum center _fd, be l with the vertical range of the drum center of coiling machine bottom lower S roller _cd, up and down S roller and coiler mandrel center horizontal range

The characteristic parameter of collecting belt steel, the characteristic parameter of described band steel comprises the thickness h of band steel, the width b of band steel, band steel yield limit σ _s, band steel elastic modulus E;

Given all kinds of application factor, described application factor comprises the application factor ψ of pressure roller power application factor ξ, pressure roller cocked position ₁, ψ ₂;

Calculate the cocked position of pressure roller, the computing formula of described pressure roller cocked position is

Definition coiling process parameter k, and given maximum reeling radius R _max, described definition coiling process parameter k represents that band steel has been wrapped coiling machine k and enclosed;

Calculate reeling radius, the computing formula of described reeling radius is R=R ₀+ kh;

Judge pressure roller position, the computing formula of described pressure roller position control angle β is $\mathrm{\β}={\mathrm{\β}}_1+{\mathrm{\β}}_2=\arcsin \left(\frac{l_{o_{1}a}}{\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right)+\arccos \left(\frac{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2+R_{\mathrm{zy}}^2-{(R+\frac{d_y}{2})}^2}{2R_{\mathrm{zy}}\sqrt{{l_{\mathrm{oa}}}^2+{l_{o_{1}a}}^2}}\right),$

Wherein, β ₁for the drum center of described coiling machine and the line of the pivot of pressure roller and angle, the β in plumb line direction ₂for the pivot of minimum steel band situation lower compression roller center and the line of described pressure roller pivot and the drum center of described coiling machine and described pressure roller line between angle;

Judge whether reeling radius is less than or equal to the difference that maximum reeling radius deducts belt steel thickness, described to judge whether reeling radius is less than or equal to the formula that maximum reeling radius deducts the difference of belt steel thickness be R≤R _max-h, wherein R _maxfor maximum reeling radius.