CN102107214A - Intermediate roller contour of intermediate roller movable type convexity high-accuracy control temper mill - Google Patents

Abstract

The invention relates to an intermediate roller contour, in particular to an intermediate roller contour of an intermediate roller movable type convexity high-accuracy control temper mill. The intermediate roller contour of the intermediate roller movable type convexity high-accuracy control temper mill consists of three continuous line segments, wherein a polynomial curve equation of a head roller contour is y=A2x<2>+A4x<4>+A6x<6>+A8x<8> by taking a crossing point of a head part and an intermediate segment as an origin of coordinates, axial direction of the intermediate roller as an X axis and radial direction of the intermediate roller as a Y axis; and in the equation, the origin of coordinates is the crossing point of the head roller contour and the intermediate segment, the axial direction of the intermediate roller is the X axis, the radial direction of the intermediate roller is the Y axis, R' is radius difference between roller bodies of two roller-shaped ends of the head, and L1 is more than 0 and less than or equal to L/3 and the R' is more than 0 and less than R. Through the roller contour, a forced-contact condition is greatly relieved, contact pressure between rollers is uniformly distributed, a peak value of the contact pressure is greatly reduced, the improvement on the service periods of the rollers is facilitated, a set value of rolling force is reduced, the service life of the rollers is prolonged, and the risk of roller spalling is reduced.

Description

The intermediate calender rolls roll forming of the portable convexity high accuracy control of intermediate calender rolls planisher

Technical field

The present invention relates to a kind of intermediate calender rolls roll forming, relate in particular to the intermediate calender rolls roll forming of the portable convexity high accuracy control of a kind of intermediate calender rolls planisher.

Background technology

The strip material plays important effect as one of most important product of steel and iron industry in the national economic development.It all has extremely widely in industry, agricultural, national defence and daily life uses.Along with developing rapidly of modern industry and science and technology, the users of industrial enterprise have proposed more and more stricter requirement to the plate quality of strip.

As shown in Figure 1, the portable convexity high accuracy control of the intermediate calender rolls of present two-shipper frame six rollers planisher (being called for short the HCM planisher) comprises two groups of working rolls 1, intermediate calender rolls 2 and the backing roll 3 of symmetric arrangement up and down, planisher adopts dried smooth mode to produce, has just curved and two kinds of plate shapes of the intermediate roll shifting regulating measure of working roll, Baosteel 1420 connects and moves back unit to adopt two-shipper frame 6 roller HCM planishers that tinning substrate is carried out smooth, and the roll-force maximum is 1176 tons; This planisher intermediate calender rolls roll forming, the end is a fillet, and width is 50mm, and the end radius difference is 0.63mm.Shape of working roll is the half period sine curve, and body of roll mid point and roller end diameter difference are 0.08mm.

At present, there is following problem in this two-shipper frame HCM planisher:

(1) frame upper working rolls and lower working rolls end wear is serious

Because adopt dried smooth mode to produce, the coefficient of friction that band steel 4 and working roll are 1 is very big, the frame roll-force is generally greater than 900 tons, and working roll 1 deflection deformation is serious.Especially produce thin (thickness is less than 0.20mm), narrower (width is less than 1000mm), when modulation degree is the band steel of T-4 and T-5, roll-force can reach more than 1100 tons, this moment, the upper working rolls and lower working rolls end contacted with each other, and pressed.Frame working roll 1 adopts the texturing roller, surface roughness is very big, Ra is about 1.3 μ m, make that to press back working roll 1 end wear very serious, working roll 1 end is light blue after the quenching behind the following machine, some in addition can't continue grinding, can only scrap, not only reduce the operating rate of planisher, and the defective band steel amount that has increased the roller consumption and produced because of roll change, influenced the quality in kind level of band steel.

(2) the plate shape regulating power of intermediate calender rolls 2 roll shiftings can't be brought into play

Press in order to obtain good plate shape and to eliminate, need the play intermediate calender rolls to reduce the length of harmful contact zone.Present intermediate calender rolls 2 roll forming ends are fillet, indifferent to the elimination of pressing, need bigger roll shifting amount just can reduce to press, line length is descending alters a great deal in contact between this moment roller, roller presses the power peak value indirectly and sharply increases, support roller 3, working roll 1 wearing and tearing aggravation, even problems such as roll surface peels off, quick-fried roller take place.

(3) the actual percentage elongation of some specifications does not reach setting value

Under the situation that existence is pressed, the contact force between the upper working rolls and lower working rolls has reduced the action effect of roll-force, makes effective roll-force reduce, and the actual percentage elongation of band steel reduces.In order to reach the setting percentage elongation, can only increase and set roll-force and intermediate tension.At present when production 0.18mm thick T-4, T-5 expect, even roll-force and intermediate tension all reach the percentage elongation that higher limit (1176 tons, 300MPa) still can not reach regulation.This shows that the existence of pressing has seriously restricted the elongation control ability of planisher.

So the intermediate calender rolls that needs a kind of new roll forming is to improve the work effect of HCM planisher.

Summary of the invention

Technical problem to be solved by this invention has provided the intermediate calender rolls roll forming of the portable convexity high accuracy control of a kind of intermediate calender rolls planisher, the head roll forming of this intermediate calender rolls is a polynomial curve, make that pressing situation alleviates greatly, roller presses power indirectly and is evenly distributed, prolong the service life of roll, reduce the risk of spalling of rolls.

The present invention is achieved in that the intermediate calender rolls roll forming of the portable convexity high accuracy control of a kind of intermediate calender rolls planisher, and the roll forming of intermediate calender rolls is made of three sections continuous segments, and the head roll forming is a polynomial curve, and barrel length is L ₁Interlude is a straightway, and barrel length is L ₂Afterbody is a knuckle, and barrel length is L ₃Intermediate calender rolls body of roll total length L=L ₁+ L ₂+ L ₃

Intersection point with head and interlude is the origin of coordinates, intermediate calender rolls be X-axis axially, intermediate calender rolls radially be Y-axis, described head roll forming polynomial curve equation is:

y＝A ₂x ²+A ₄x ⁴+A ₆x ⁶+A ₈x ⁸ 0≤x≤L ₁

$A_2\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^2}],$ ${\mathrm{<figure-callout\; id="4"\; label="A"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">A</figure-callout>}}_4\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^4}],$ ${\mathrm{<figure-callout\; id="6"\; label="A"\; filenames="H2009102006406E00021.png"\; state="\{\{state\}\}">A</figure-callout>}}_6\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^6}],$ $A_8\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^8}]$

In the formula: R ' is the body of roll semidiameter at head roll forming two ends, L ₁∈ (0, L/3], (0, R), R is an interlude body of roll radius to R ' ∈.

Described head roll forming polynomial curve equation is:

y＝7.2×10 ^-6·x ²+9×10 ^-16·x ⁴+6×10 ^-16·x ⁶+2×10 ^-22·x ⁸ 0≤x≤250。

Described afterbody knuckle radius R ₃Be 45mm～55mm.

The head roll forming of intermediate calender rolls of the present invention is a polynomial curve, make that pressing situation alleviates greatly, roller presses power indirectly and is evenly distributed, the contact pressure peak descends significantly, helps improving the military service cycle of roll, reduces the rolling force setup value, prolong the service life of roll, reduce the risk of spalling of rolls, improve the working roll end wear, strengthen the elongation control ability of planisher; And the present invention is as long as the grinding of grinding roller workshop goes out corresponding roll forming, easy to process, cost is low, simultaneously supporting with it working roll adopts plain-barreled roll, reduced the roller consumption, reduced production cost, can promote to the HCM planisher easily, be applicable to and produce the smooth of various thin specification band steel, have broad application prospects.

Description of drawings

Fig. 1 is the scheme of installation of existing planisher intermediate calender rolls;

Fig. 2 is the scheme of installation of intermediate calender rolls of the present invention;

The indirect touch force profile comparison diagram of upper working rolls and lower working rolls when Fig. 3 is existing intermediate calender rolls and intermediate calender rolls of the present invention application;

Backing roll and intermediate calender rolls pressed the power distribution map indirectly when Fig. 4 was existing intermediate calender rolls and intermediate calender rolls of the present invention application;

Working roll and intermediate calender rolls pressed the power distribution map indirectly when Fig. 5 was existing intermediate calender rolls and intermediate calender rolls of the present invention application.

Among the figure: 1 working roll, 2 intermediate calender rolls, 3 backing rolls, 4 band steel,

Performance parameter curve behind the-application prior art intermediate calender rolls,

Use the performance parameter curve behind the intermediate calender rolls of the present invention

The n axle is body of roll coordinate (mm), and the m axle is roll gap pressure (KN/mm)

The specific embodiment

Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

As shown in Figure 2, the intermediate calender rolls roll forming of the portable convexity high accuracy control of a kind of intermediate calender rolls planisher, the roll forming of intermediate calender rolls is made of three sections continuous segments, and the head roll forming is a polynomial curve, and barrel length is L ₁Interlude is a straightway, and barrel length is L ₂Afterbody is a knuckle, and barrel length is L ₃Intermediate calender rolls body of roll total length L=L ₁+ L ₂+ L ₃

Intersection point with head and interlude is the origin of coordinates, intermediate calender rolls be X-axis axially, intermediate calender rolls radially be Y-axis, described head roll forming polynomial curve equation is:

y＝A ₂x ²+A ₄x ⁴+A ₆x ⁶+A ₈x ⁸ 0≤x≤L ₁

$A_2\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^2}],$ ${\mathrm{<figure-callout\; id="4"\; label="A"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">A</figure-callout>}}_4\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^4}],$ ${\mathrm{<figure-callout\; id="6"\; label="A"\; filenames="H2009102006406E00021.png"\; state="\{\{state\}\}">A</figure-callout>}}_6\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^6}],$ $A_8\&Element;(0,\frac{R^{\&prime;}}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2009102006406E00011.png,H2009102006406E00012.png"\; state="\{\{state\}\}">L</figure-callout>}}_1^8}]$

In the formula: R ' is the body of roll semidiameter at head roll forming two ends, L ₁∈ (0, L/3], (0, R), R is an interlude body of roll radius to R ' ∈.

Afterbody knuckle radius R ₃Be 45mm～55mm.

Preferred as present embodiment, intermediate calender rolls of the present invention, when concrete the use, select for use roll forming as follows:

Head roll forming barrel length L1 is 250mm, the body of roll semidiameter R '=0.6mm at head roll forming two ends;

Interlude is a straightway, interlude body of roll radius R=440～490mm, barrel length L ₂=1120mm;

Afterbody knuckle radius R ₃Be 50mm, the long L of the afterbody body of roll ₃Be 50mm;

Intermediate calender rolls body of roll total length L=L ₁+ L ₂+ L ₃=1420mm;

Calculate A ₂, A ₄, A ₆, A ₈Scope, and selected parameter A ₂=7.2 * 10 ^-6, A ₄=9 * 10 ^-16, A ₆=6 * 10 ^-16, A ₈=2 * 10 ^-22, obtain the polynomial curve of head roll forming:

y＝7.2×10 ^-6·x ²+9×10 ^-16·x ⁴+6×10 ^-16·x ⁶+2×10 ^-22·x ⁸ 0≤x≤250

During with the actual use of above-mentioned roll forming, obtain the service behaviour comparison diagram shown in Fig. 3,4,5:

Contrast former intermediate calender rolls roll forming, under the identical situation of actual percentage elongation, produce under the thickness and can reduce by 100～200 tons of frame roll-forces when T-4, the T-5 of 0.20mm material, the working roll end is pressed effectively and is alleviated, and end wear obviously improves.When production 0.18mm thick T-4, T-5 expected, band steel percentage elongation reached 1.3%, improves 0.1%～0.2% than before, completes successfully the setting value of production schedule regulation.Production practices illustrate that intermediate calender rolls roll forming of the present invention presses very strong elimination ability to the working roll end, can effectively reduce the rolling force setup value, improve the working roll end wear, strengthen the elongation control ability of planisher, after having used the intermediate calender rolls of roll forming of the present invention simultaneously, supporting working roll adopts plain-barreled roll to get final product, and has reduced the roller consumption, has reduced production cost.

Claims (3)

1. the intermediate calender rolls roll forming of the portable convexity high accuracy control of intermediate calender rolls planisher, it is characterized in that: the roll forming of intermediate calender rolls is made of three sections continuous segments, and the head roll forming is a polynomial curve, and barrel length is L ₁Interlude is a straightway, and barrel length is L ₂Afterbody is a knuckle, and barrel length is L ₃Intermediate calender rolls body of roll total length L=L ₁₊L ₂₊L ₃

Intersection point with head and interlude is the origin of coordinates, intermediate calender rolls be X-axis axially, intermediate calender rolls radially be Y-axis, described head roll forming polynomial curve equation is:

y＝A ₂x ²+A ₄x ⁴+A ₆x ⁶+A ₈x ⁸ 0≤x≤L ₁

$A_2\&Element;(0,\frac{R^{\&prime;}}{L_1^2}],$ $A_4\&Element;(0,\frac{R^{\&prime;}}{L_1^4}],$ $A_6\&Element;(0,\frac{R^{\&prime;}}{L_1^6}],$ $A_8\&Element;(0,\frac{R^{\&prime;}}{L_1^8}]$

In the formula: R ' is the body of roll semidiameter at head roll forming two ends, L ₁∈ (0, L/3], R ' ∈ (0, R), R is interlude body of roll radius.

2. the intermediate calender rolls roll forming of the portable convexity high accuracy control of intermediate calender rolls as claimed in claim 1 planisher, it is characterized in that: described head roll forming polynomial curve equation is: y=7.2 * 10 ^-6X ²+ 9 * 10 ^-16X ⁴+ 6 * 10 ^-16X ⁶+ 2 * 10 ^-22X ⁸0≤x≤250.

3. the intermediate calender rolls roll forming of the portable convexity high accuracy control of intermediate calender rolls as claimed in claim 1 planisher is characterized in that: described afterbody knuckle radius R ₃Be 45mm～55mm.

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