CN114472530B - Cold rolling mill working roll, roll forming method and UCMW cold rolling mill - Google Patents
Cold rolling mill working roll, roll forming method and UCMW cold rolling mill Download PDFInfo
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- CN114472530B CN114472530B CN202210294922.2A CN202210294922A CN114472530B CN 114472530 B CN114472530 B CN 114472530B CN 202210294922 A CN202210294922 A CN 202210294922A CN 114472530 B CN114472530 B CN 114472530B
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- 238000005097 cold rolling Methods 0.000 title claims abstract description 39
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The invention relates to the field of cold-rolled sheet strip rolling, in particular to a working roll of a cold-rolling mill, a roll shape forming method and a UCMW cold-rolling mill, wherein one side of the roll shape of the working roll is a first flat roll section, and the other side of the roll shape comprises the following components: the first end of the second flat roller section is connected with the first flat roller section; the first end of the edge drop control section is tangent to the second end of the second flat roller section, the edge drop control section is an arc, and the center of the edge drop control section faces the working roller; the first end of the breakage-proof belt control section is tangent to the second end of the edge drop control section, the breakage-proof belt control section is in an arc shape, and the circle center of the breakage-proof belt control section is opposite to the working roller and is used for contacting with the edge of the strip steel when the working roller is in a working state; and the deviation control section is connected with the second end of the breakage-proof belt control section. The anti-breakage control section adopts a reverse arc design, so that the roll chamfer change rate corresponding to the edge of the strip steel can be reduced, the stress of the edge is homogenized, the problem of breakage is effectively prevented, and the edge lowering adjustment and control function can be achieved.
Description
Technical Field
The invention relates to the field of cold-rolled sheet strip rolling, in particular to a working roll of a cold-rolling mill, a roll forming method and a UCMW cold-rolling mill.
Background
Cold-rolled non-oriented silicon steel is used as a main material for manufacturing stator and rotor iron cores of equipment such as transformers, motors, generators and the like, and the thickness reduction of the edge part of the silicon steel edge finger-falling strip steel in the rolling process directly influences the stacking coefficient of the motor and the performance of the whole machine. In recent years, as the requirements of end users on motors are higher and higher, the requirements on the side precipitation level of cold-rolled silicon steel products are higher and higher.
The shape of the loaded roll gap of the rolling mill determines the section shape of strip steel, and the initial roll shape of the roll is taken as an important factor influencing the shape of the loaded roll gap of the rolling mill, so that the optimization of the roll shape becomes an effective means for improving the edge drop control capability of silicon steel. For example, the roll shape adopts linear chamfering, but because the transition of the chamfering section and the flat roll section is abrupt, stress concentration points exist at the connecting position, the abrasion of the working roll is easy to be aggravated, the service life of the working roll is reduced, and the shape control of the working roll in the later stage of service is not facilitated. And if the roll shape adopts an arc chamfer, the roll shape is in gentle transition with the flat roll section, so that the problem of stress concentration is avoided, but the closer the distance between the roll shape and the edge part is, the larger the chamfer change rate is, the uneven deformation of the edge part of the strip steel is caused, and the strip breakage is easy to occur.
In the prior art, a working roller with a roller shape of two sections of circular arcs is arranged, wherein the first section of circular arc is an edge drop control section, and the second section of circular arc is a deviation control section, and the inverted circular arc design ensures that the chamfer change is gentle, but the purpose of reducing the edge stress of the strip steel cannot be achieved.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the working roll cannot reduce the edge stress of strip steel, thereby providing a cold rolling mill working roll, a roll forming method and a UCMW cold rolling mill, and the technical scheme is as follows:
in one aspect, the present application provides a cold rolling mill work roll, one side of the roll profile of the work roll is a first flat roll segment, the other side of the roll profile includes:
a second flat roll segment, the first end of which is connected with the first flat roll segment;
the first end of the edge drop control section is tangent to the second end of the second flat roller section, the edge drop control section is an arc, and the circle center of the edge drop control section faces the working roller;
the first end of the breakage-proof belt control section is tangent to the second end of the edge drop control section, the breakage-proof belt control section is in an arc shape, and the circle center of the breakage-proof belt control section is opposite to the working roller and is used for contacting with the edge of the strip steel when the working roller is in a working state; and the deviation control section is connected with the second end of the breakage-proof belt control section.
Preferably, the deviation control section is a straight line section, and the deviation control section is tangent to the second end of the breakage-proof belt control section.
Preferably, the second end of the edge drop control section is 60-120 μm from the first radial depth of the second flat roller section, the second end of the breakage-proof strip control section is 100-160 μm from the second radial depth of the second flat roller section, and the difference between the second radial depth and the first radial depth is 0-40 μm; and/or the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section is 110-150 mm, and the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section is 15-30 mm.
On the other hand, the application provides a roll shape forming method of the working roll, wherein a rectangular coordinate system is established by taking the axial center line of a roll of the roll shape as a Y axis and taking a flat roll section of the roll shape as an X axis, and the method comprises the following steps:
acquiring a preset width of the strip steel, a first preset length and a first radial depth of an edge drop control section, and a second preset length and a second radial depth of an anti-breakage control section; the first preset length is the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the second preset length is the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section, and the second radial depth is the distance between the second end of the breakage-proof belt control section and the X axis;
calculating the third axial depth of the breakage-preventing strip control section, the second axial depth of the edge drop control section and the first axial depth based on the preset width, the first preset length and the second preset length of the strip steel; the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, the second axial depth is the distance between the second end of the edge drop control section and the Y axis, and the first axial depth is the distance between the first end of the edge drop control section and the Y axis;
and drawing the roller shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth and the second radial depth.
Preferably, the method further comprises: obtaining a third preset length of the roller shape;
calculating a fourth axial depth of the deviation control section based on the third preset length; the fourth axial depth is the distance between the second end of the deviation control section and the Y axis;
calculating the slope of the deviation control section based on the circle center coordinate and the second end coordinate of the breakage prevention control section;
and drawing the deviation control section of the roll shape based on the slope of the deviation control section and the fourth axial depth.
Preferably, the edge drop control segment is drawn by a first mathematical model, where the first mathematical model is:
wherein said x 1 Representing the first axial depth, the x 2 Representing the second axial depth, the L 1 Representing the first preset length, the y 2 Representing the first radial depth; and/or
Drawing the breakage-proof control section through a second mathematical model, wherein the second mathematical model is as follows:
wherein m is 2 、n 2 Respectively representing the abscissa and the ordinate of the circle center of the breakage-proof belt control section, m 1 、n 1 Respectively representing the abscissa and the ordinate of the circle center of the edge drop control section, wherein x is 2 Representing the second axial depth, y 2 Representing the first radial depth, x 3 Representing the third axial depth, y 3 Representing the second radial depth.
Preferably, the breakage-proof control section is drawn by a third mathematical model, which is:
wherein x is 3 、y 3 Respectively representing a third radial depth and a second radial depth, x 4 Representing the fourth axial depth, m 2 、n 2 And respectively representing the abscissa and the ordinate of the circle center of the breakage-proof belt control section.
On the other hand, the application provides a roll shape forming device of above-mentioned work roll, uses the roll axial central line of roll shape as Y axle, the plain roll section of roll shape is X axle and establishes rectangular coordinate system, the device includes:
the first acquisition module is used for acquiring the preset width of the strip steel, the first preset length and the first radial depth of the edge drop control section, and the second preset length and the second radial depth of the breakage prevention control section; the first preset length is the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the second preset length is the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section, and the second radial depth is the distance between the second end of the breakage-proof belt control section and the X axis;
the first calculation module is used for calculating the third axial depth of the breakage-proof strip control section, the second axial depth of the edge drop control section and the first axial depth based on the preset width, the first preset length and the second preset length of the strip steel; the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, the second axial depth is the distance between the second end of the edge drop control section and the Y axis, and the first axial depth is the distance between the first end of the edge drop control section and the Y axis;
and the first drawing module is used for drawing the roller shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth and the second radial depth.
Preferably, the apparatus further comprises: the second acquisition module is used for acquiring a third preset length of the roller shape; the second calculating module is used for calculating the fourth axial depth of the deviation control section based on the third preset length; the fourth axial depth is the distance between the second end of the deviation control section and the Y axis;
the third calculation module is used for calculating the slope of the deviation control section based on the center coordinates and the second end coordinates of the breakage prevention control section;
and the second drawing module is used for drawing the deviation control section of the roll shape based on the slope of the deviation control section and the fourth axial depth.
In yet another aspect, the present application provides a computer device comprising: the roll forming device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions, so that the roll forming method is executed.
In yet another aspect, the present application provides a computer readable storage medium storing computer instructions for causing a computer device to perform the roll forming method described above.
In yet another aspect, the present application provides a computer program product for implementing the roll forming method described above when the computer program product is run on a computer device.
In yet another aspect, the present application provides a UCMW cold-rolling mill comprising the cold-rolling mill work roll described above.
The technical scheme of the invention has the following advantages:
according to the working roll of the cold rolling mill, the edge thinning amount of strip steel is reduced through the design of the edge chamfer of the working roll, and the edge drop control level of the cold rolling mill is improved; the anti-breakage control section adopts a reverse arc design, so that the roll chamfer change rate corresponding to the edge of the strip steel can be reduced, the stress of the edge is homogenized, the problem of breakage is effectively prevented, and the edge lowering adjustment and control function can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art work roll shape;
FIG. 2 is a schematic view showing a roll shape of a work roll of a cold rolling mill according to embodiment 1 of the present invention;
FIG. 3 is a flowchart showing a roll forming method according to embodiment 2 of the present invention;
FIG. 4 is an analysis diagram of the side drop control segment of FIG. 2;
FIG. 5 is an analysis of the anti-breakage control portion of FIG. 2;
FIG. 6 is an analysis chart of the run-out control segment of FIG. 2;
FIG. 7 is a block diagram showing the construction of a roll forming apparatus according to embodiment 3 of the present invention;
FIG. 8 is a block diagram showing still another construction of a roll forming apparatus according to embodiment 3 of the present invention;
FIG. 9 is a schematic block diagram of a computer device according to embodiment 4 of the present invention;
FIG. 10 is a schematic view of a single arc roll;
FIG. 11 is a schematic view showing a roll shape of the cold rolling mill in example 1 in general;
FIG. 12 is a schematic diagram showing a comparison of cold rolling mill roll shape and single arc roll shape in example 1.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the roller is a two-segment arc roller disclosed in the prior art, in the roller shape of the roller 101, the roller shape corresponding to the first segment 102 is a flat roller segment, the roller shape corresponding to the second segment 103 is an arc edge drop control segment, and the roller shape corresponding to the third segment 104 is an arc compensation segment. The flat roller section and the circular arc edge drop control section belong to working sections and are used for improving strip steel edge drop, and the circular arc compensation section is used for reducing strip steel deviation and the strip breakage risk. The arc edge descent control section is arc-shaped, the arc compensation section is reverse arc-shaped, and the reverse arc design can enable the chamfer change to be gentle, but the arc compensation section is not in direct contact with the edge of the strip steel, so that the aim of reducing the stress of the edge of the strip steel cannot be achieved.
Example 1
The embodiment provides a working roll of a cold rolling mill, which can be arranged on the cold rolling mill to roll strip steel. As shown in fig. 2, which shows the roll profile structure of the work roll, the roll profile of the work roll may be bounded by the center line of the roll axis 201 thereof, dividing the roll profile into two sides, wherein one side includes a first flat roll segment 209 and the other side includes a second flat roll segment 203, a drop control segment 204, a breakage prevention control segment 205, and a deviation control segment 206. The first end of the second flat roller section 203 is connected with the first end of the first flat roller section 209, the first end of the edge drop control section 204 is tangent with the second end of the second flat roller section 203, the edge drop control section 204 is arc-shaped, and the center of the circle of the edge drop control section faces the working roller (as shown in fig. 5), namely, the second end of the second flat roller section 203 is connected with the first end of the edge drop control section 204, and the flat roller section 203 is tangent with the first end of the edge drop control section 204 (namely, the second end of the flat roller section 203). The first end of the edge drop control section 204 is an edge drop control section starting point, the second end of the edge drop control section 204 is an edge drop control section ending point, the ending point is a characteristic point for evaluating the shape of the near edge of the strip steel, the edge drop level after the edge cutting of the strip steel finished product is determined, the first radial depth of the second end of the edge drop control section 204 from the second flat roller section 203 can be 60 μm to 120 μm, namely, the lengths of the second end of the edge drop control section 204 and the first end of the edge drop control section 204 along the roller radial direction 202 can be 60 μm to 120 μm. The second end of the edge drop control section 204 may be 110mm to 150mm from the roll axial distance of the first end of the edge drop control section 204, i.e., the second end of the edge drop control section 204 may be 110mm to 150mm from the first end of the edge drop control section 204 along the roll axial direction 201.
The breakage preventing belt control section 205 is arc-shaped, and the center of the circle of the breakage preventing belt control section is away from the working roller. The first end of the breakage-preventing band control section 205 is connected to the second end of the drop control section 204, and the breakage-preventing band control section 205 is tangential to the drop control section 204 with respect to the first end of the breakage-preventing band control section 205 (i.e., the second end of the drop control section 204). When the cold rolling mill works, the working rolls are extruded, and the breakage-preventing control section 205 is directly contacted with the edge of the strip steel. The anti-breakage control section 205 adopts a reverse arc (namely, the circle center of the anti-breakage control section 205 is opposite to the working roller) design, so that the roll chamfer change rate corresponding to the edge of the strip steel can be reduced, the edge stress is homogenized, and the risk of breakage is effectively prevented. The second end of the breakage-preventing control section 205 is a breakage-preventing control position point, which determines the edge drop level of the hard rolled coil and the roll shape change rate of the breakage-preventing control section, and the second radial depth of the second end of the breakage-preventing control section 205 from the second flat roll section 203 may be 100 μm to 160 μm, i.e., the lengths of the second end of the breakage-preventing control section 205 and the first end of the edge drop control section 204 along the roll radial direction 202 may be 100 μm to 160 μm. To ensure a smooth degree of the anti-breakage control portion 205, the difference between the second radial depth and the first radial depth may be 0 μm to 40 μm. The axial distance between the second end of the breakage-proof strip control section 205 and the roller at the first end of the breakage-proof strip control section 205 may be 15mm to 30mm, i.e., the length between the second end of the breakage-proof strip control section 205 and the first end of the breakage-proof strip control section 205 in the axial direction 201 of the roller may be 15mm to 30mm.
As shown in fig. 2, the deviation control section 206 is connected to the second end of the breakage preventing section 205, the cold rolling mill presses the work rolls during operation, the edge of the strip steel 210 is directly contacted with the breakage preventing section 205, and the deviation control section 206 is not directly contacted with the edge of the strip steel.
In summary, the working roll of the cold rolling mill provided by the embodiment can reduce the edge thinning amount of the strip steel through the design of the chamfering of the edge of the working roll, and improve the edge drop control level of the mill; the anti-breakage control section adopts a reverse arc design, so that the roll chamfer change rate corresponding to the edge of the strip steel can be reduced, the edge stress is homogenized, the risk of breakage is effectively prevented, and the edge lowering regulation and control function can be achieved.
In one or more embodiments, as shown in fig. 2, the deviation control segment 206 is a straight segment, a first end of the deviation control segment 206 is connected to a second end of the breakage preventing control segment 205, and the deviation control segment 206 is tangential to the breakage preventing control segment 205 and to a second end of the breakage preventing control segment 205 (i.e., the first end of the deviation control segment 206). The second end of the run-out control segment 206 is a work roll edge roll profile feature point that determines the roll grinding capacity of the cold rolling mill. The deviation control section 206 adopts a straight line design, and the smooth transition can ensure that the chamfer change rate cannot be increased sharply after the strip steel is deviated, and the edge tension is slowed down.
Example 2
This example provides a method of forming a roll profile, and FIG. 3 is a flow chart illustrating the formation of a roll profile for a work roll of a cold rolling mill as described in example 1, according to certain embodiments of the invention. While the processes described below include a number of operations that occur in a particular order, it should be clearly understood that the processes may include more or less operations that may be performed sequentially or in parallel (e.g., using a parallel processor or a multi-threaded environment).
As shown in fig. 2 and 3, a rectangular coordinate system can be established with a center line along a roll axial direction 201 of a roll shape as a Y axis and a flat roll section of the roll shape as an X axis, the roll shape forming method comprising the steps of (S101 to S103):
s101, acquiring a preset width of the strip steel, a first preset length and a first radial depth of an edge drop control section, and a second preset length and a second radial depth of an anti-breakage control section.
As shown in fig. 2, the first preset length 207 is a distance between the second end of the edge drop control section 204 and the first end of the edge drop control section 204 along the axial direction 201 of the roll, and the second preset length 208 is a distance between the second end of the breakage preventing control section 205 and the first end of the breakage preventing control section 205 along the axial direction 201 of the roll. The value of the first preset length 207 can be 110 mm-150 mm, the edge drop control effect cannot be achieved due to the fact that the value of the first preset length 207 is too small, the roll-type starting point (namely the first end of the edge drop control section 204) is too close to the middle of the strip steel due to the fact that the transverse flow compensation capacity of the middle area of the strip steel is weak, and the problem of plate shape is prone to occur. The second preset length 208 corresponds to the steep drop zone at the edge of the strip steel, and the value of the steep drop zone can be 15 mm-30 mm.
The first radial depth is the distance from the second end of the drop control segment 204 to the X-axis and the second radial depth is the distance from the second end of the anti-breakage control segment 205 to the X-axis. The first preset length 207, the second preset length 208, the first radial depth and the second radial depth may be given according to the field drop control requirement, and the preset width of the strip steel is the width of the strip steel 210 to be rolled.
S102, calculating the third axial depth of the breakage-proof strip control section, the second axial depth of the edge drop control section and the first axial depth based on the preset width, the first preset length and the second preset length of the strip steel.
The third axial depth is the distance from the second end of the breakage prevention control section 205 to the Y axis, the second axial depth is the distance from the second end of the drop control section 204 to the Y axis, and the first axial depth is the distance from the first end of the drop control section 204 to the Y axis (i.e., the distance from the second end of the second flat roller section 203 to the Y axis). As shown in fig. 2, point a (x 1 0) is the first end of the side drop control segment 204, point B (x 2 ，y 2 ) For the second end of the side drop control segment 204, point C (x 3 ，y 3 ) A second end of the control segment 205 is breakage resistant. Wherein the first axial depth has a value of x 1 The value of the second axial depth is x 2 The third axial depth has a value x 3 A first radial depth of y 2 The second radial depth is y 3 . The first axial depth, the second axial depth, and the third axial depth may be:
wherein N is the preset width of the strip steel, L 1 For a first preset length L 2 Is a second predetermined length. It should be noted that, when the working roll in embodiment 1 is a working roll of a UCMW cold rolling mill, since the UCMW cold rolling mill has a roll shifting function, a roll shifting position can be preset according to the width and convexity of the strip steel, so as to meet the rolling mill edge drop control requirement. The work roll preset roll shifting position is divided into two stages of rough adjustment and fine adjustment, wherein the rough adjustment comprises the following steps: querying minimum rolling width N min And a maximum rolling width N max At a middle width N mid ＝(N min +N max ) And/2 is used as the preset width of the strip steel. If the actual width of the incoming material is M, the roll shifting quantity W of the working roll needs to be regulated 1 ＝(M-N mid ) And/2, the aim is to keep the roll form insertion amount consistent for different strip widths. Wherein W is 1 A negative value indicates that the roll section of the working roll moves inwards, W 1 Expressed as a positive valueThe roller section of the working roller moves outwards.
The fine tuning includes: let the standard hot rolling convexity be H 0 The actual convexity is H. If H is less than or equal to H 0 The secondary roller shifting amount calculation is not needed; if H > H 0 The secondary channeling of the working rolls is required to compensate for the deterioration of the hot rolling convexity by increasing the roll form depth at the edge of the strip. Secondary roll-shifting value W 2 The calculation formula is as follows:
therefore, the preset total roll shifting amount of the working roll is as follows:
and S103, drawing a roller shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth and the second radial depth.
The roll profile of the working roll of the cold rolling mill provided in example 1 has a Y axis along the center line of the roll axial direction 201, a first flat roll section 209 on one side, and a second flat roll section 203, an edge drop control section 204, a breakage prevention control section 205, and a deviation control section 206 on the other side. As shown in fig. 2, the second end of the second flat roller segment 203 is connected to the first end of the edge drop control segment 204, and the second flat roller segment 203 can be drawn according to the first axial depth, and the edge drop control segment 204 can be drawn according to the first axial depth, the first preset length, and the first radial depth. The second end of the drop control segment 204 is tangential to the first end of the anti-breakage control segment 205, and the anti-breakage control segment 205 may be drawn according to a first axial depth, a second axial depth, a third axial depth, a first radial depth, and a second radial depth. The deviation control section 206 is connected to the second end of the belt breakage preventing control section 205, and the deviation control section 206 may be a straight line section or a curved line section, which may be reasonably selected by a person skilled in the art according to practical situations, and is not limited herein. It should be noted that, because the Y axis is the axial center line of the roller, after the deviation control section 206 is drawn, the first flat roller section 209 may be drawn according to the length of the second end of the deviation control section 206 from the Y axis.
As shown in fig. 2 and 4, the second flat roller segment 203 is tangent to the drop control segment 204, then line O 1 A is perpendicular to point a, from which it is possible to:
the radius of the drop control segment 204 may be determinedCentre of circle O 1 Coordinates of->The edge drop control segment 204 may be drawn in a rectangular coordinate system by a first mathematical model:
wherein x is 1 Representing a first axial depth, x 2 Represents the second axial depth, L 1 Representing a first preset length, y 2 Representing a first radial depth.
As shown in fig. 2 and 5, the drop control section 204 is tangent to the breakage prevention control section 205 at point B, and is a straight line O 1 B and straight line O 2 B coincide, i.e. line O 1 B and straight line O 2 B is equal, whereby:
(m 2 -x 2 ) 2 +(n 2 -y 2 ) 2 ＝(m 2 -x 3 ) 2 +(n 2 -y 3 ) 2
by combining the above, the belt breakage prevention control section 205 is drawn in a rectangular coordinate system through a second mathematical model, and the second mathematical model is as follows:
wherein m is 2 、n 2 Respectively representing the abscissa and the ordinate of the circle center of the breakage-proof belt control section, m 1 、n 1 Respectively representing the abscissa and the ordinate of the circle center of the side drop control section, and x 2 Represents the second axial depth, y 2 Represents a first radial depth, x 3 Represents the third axial depth, y 3 Representing a second radial depth.
In one or more embodiments, as shown in fig. 2, the deviation control segment 206 is a straight segment, the first end of the deviation control segment 206 is tangent to the second end of the breakage preventing control segment 205, i.e., the deviation control segment 206 is tangent to the breakage preventing control segment 205 at point C, point C (x 3 ，y 3 ) Is a second end of the run-out control segment 206. Drawing the breakage-proof tape control section 206 may include the following steps (S201 to S204):
s201, acquiring a third preset length of the roller shape.
As shown in fig. 2, the third preset length is the total length of the roll profile in the roll axial direction 201. The third predetermined length of the roll shape is given according to the actual situation and is not limited herein. As shown in fig. 2, point E (x 4 0) and point D (x 4 ，y 4 ) The length in the axial direction 201 of the roll is a third preset length.
S202, calculating the fourth axial depth of the deviation control section based on the third preset length.
The fourth axial depth is the distance from the second end of the deviation control segment 206 to the Y axis, and the second end of the deviation control segment 206 is the characteristic point of the edge roll profile of the work roll, which determines the roll grinding amount. Since the Y-axis is the axial center line of the roll shape, the second end of the first flat roll segment 209 (as shown in fig. 2, point E is the second end thereof) is also a fourth axial depth from the Y-axis, and the first flat roll segment 209 can be drawn according to the fourth axial depth accordingly. The distance between the second end of the deviation control section 206 and the first end of the deviation control section 206 along the axial direction 201 of the roll is a fourth preset length of the deviation control section 206, which can be calculated from the third preset length and the preset width of the strip steel.
S203, calculating the slope of the deviation control section based on the circle center coordinates and the second end coordinates of the breakage prevention control section.
As shown in fig. 2 and 6, since the deviation control segment 206 is tangential to the breakage preventing portion 205 at point C, it can be seen that:
thus, the slope of the run-out control segment 206:
s204, drawing the deviation control section of the roll shape based on the slope of the deviation control section and the fourth axial depth.
The anti-breakage control segment 206 may be plotted by a third mathematical model:
wherein x is 3 、y 3 Respectively representing a third radial depth and a second radial depth, x 4 Represents a fourth axial depth, m 2 、n 2 The abscissa and ordinate of the center of the breakage prevention band control segment 205 are shown, respectively.
The roll profile depth of the edge part of the working roll can be calculated by the method:
wherein L is WR A third predetermined length representing the roll profile of the work roll. The depth of the edge of the working roll affects the maximum grinding amount of the roll by adjusting A (x 1 ，0)、B(x 2 ，y 2 )、C(x 3 ，y 3 ) The three position point parameters control the depth of the roller shape at the edge of the working roller, thereby realizing the purpose of reducing the roller grinding consumption.
The method comprises the steps of setting the preset width of strip steel, the first preset length and the first radial depth of the edge drop control section, the second preset length and the second radial depth of the breakage prevention control section and the third preset length of the roll shape, outputting a visual image of the roll shape, and adjusting the parameter size of the roll shape according to the field use condition and the rolling hard edge drop level requirement, and has high flexibility.
Example 3
The present embodiment provides a roll shape forming apparatus for drawing a roll shape of a work roll of a cold rolling mill provided in embodiment 1, which may be a computer device or may be provided in a computer device. The rectangular coordinate system is established by taking the axial center line of the roller shape as the Y axis and the flat roller section of the roller shape as the X axis, as shown in fig. 7, the device comprises: a first acquisition module 301, a first calculation module 302 and a first rendering module 303.
A first obtaining module 301, configured to obtain a preset width of the strip steel, a first preset length and a first radial depth of the edge drop control section, and a second preset length and a second radial depth of the breakage prevention control section; the first preset length is the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the second preset length is the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section, and the second radial depth is the distance between the second end of the breakage-proof belt control section and the X axis; for details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
A first calculating module 302, configured to calculate a third axial depth of the breakage preventing band control section, a second axial depth of the edge drop control section, and a first axial depth based on the preset width, the first preset length, and the second preset length of the strip steel; the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, the second axial depth is the distance between the second end of the edge drop control section and the Y axis, and the first axial depth is the distance between the first end of the edge drop control section and the Y axis; for details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
The first drawing module 303 is configured to draw the roller shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth, and the second radial depth. For details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
In one or more embodiments, as shown in fig. 8, the apparatus further includes a second acquisition module 304, a second calculation module 305, a third calculation module 306, and a second rendering module 307.
A second obtaining module 304, configured to obtain a third preset length of the roll shape; for details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
A second calculating module 305, configured to calculate a fourth axial depth of the deviation control segment based on the third preset length; the fourth axial depth is the distance between the second end of the deviation control section and the Y axis; for details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
A third calculation module 306, configured to calculate a slope of the deviation control segment based on the center coordinates and the second end coordinates of the breakage-proof control segment; for details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
And a second drawing module 307, configured to draw the deviation control segment of the roll shape based on the slope of the deviation control segment and the fourth axial depth. For details, please refer to the related description in embodiment 2, and the detailed description is omitted here.
The effect of the roll forming apparatus of this embodiment can be seen from the description of embodiment 2, and will not be described here.
Example 4
The present embodiment provides a computer device, as shown in fig. 9, which includes a processor 401 and a memory 402, where the processor 401 and the memory 402 may be connected by a bus or other means, and in fig. 9, the connection is exemplified by a bus.
The processor 401 may be a central processing unit (Central Processing Unit, CPU). The processor 401 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), graphics processor (Graphics Processing Unit, GPU), embedded Neural network processor (Neural-network Processing Unit, NPU) or other dedicated deep learning coprocessors, application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., or a combination of the above.
The memory 402 is used as a non-transitory computer readable storage medium, and may be used to store a non-transitory software program, a non-transitory computer executable program, and modules, such as program instructions/modules corresponding to the roll forming method in the embodiment of the present invention (e.g., the first obtaining module 401, the first calculating module 402, and the first drawing module 403, the second obtaining module 304, the second calculating module 305, the third calculating module 306, and the second drawing module 307 in the above embodiments). The processor 401 executes various functional applications of the processor and data processing, i.e., implements the roll forming method described above, by running non-transitory software programs, instructions, and modules stored in the memory 402.
Memory 402 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created by the processor 401, or the like. In addition, memory 402 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 402 may optionally include memory located remotely from processor 401, such remote memory being connectable to processor 401 through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions, and the computer executable instructions can execute the roll forming method in any of the above method embodiments. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
The present embodiments also provide a computer program product for implementing the roll forming method of embodiment 2 when the computer program product is run on a computer device.
The embodiment also provides a UCMW cold-rolling mill, which comprises the cold-rolling mill working roll provided in the embodiment 1, wherein the working roll is arranged on the UCMW cold-rolling mill and is used for carrying out roll treatment on strip steel.
Comparing the cold rolling mill working roll provided in the embodiment 1 with the working roll with the roll shape of a single arc chamfer, wherein the third preset length of the roll shape of the working roll is 1420mm, the preset width of the strip steel is 1230mm, as shown in fig. 10 and 11, the initial position of the roll shape of the prior art is 130mm away from the edge of the strip steel, the depth of the edge of the strip steel corresponding to the roll shape is 100 mu m, and the depth of the roll shape of the edge of the working roll is 300 mu m; compared with the prior art, the working roll of the cold rolling mill provided in the embodiment 1 has the advantages that the roll shape depth of the edge part of the strip steel is increased from 100 mu m to 120 mu m, so that the edge drop control level of the rolling mill is further improved; the depth of the edge roll shape of the working roll is reduced from 300 mu m to 183 mu m, so that the grinding loss of the roll is reduced. In addition, the change rate of each section of curve of the new roller shape is controlled to be not higher than that of the single-arc roller shape by increasing the insertion depth of the roller shape.
TABLE 1
As shown in table 1, the roll shape change rate of the two arc areas of different roll shapes is compared, and the roll shape chamfer change rate of the first arc area in example 1 is 0.667, which is basically consistent with the change rate of the single arc roll shape; the second arc region, i.e. the strip edge region, has a roll shape chamfer change rate of 1, which is lower than that of the single arc roll shape, and greatly reduces the risk of strip breakage, and theoretically demonstrates the rationality of the design of the strip breakage prevention roll shape.
According to the actual conditions, roll shape parameters of working rolls of the cold rolling mill of the embodiment 1 are obtained: the preset width of the strip steel is 1230mm, the first preset length is 150mm, the second preset length is 20mm, the first radial depth is 100 mu m, the second radial depth is 120 mu m, and the third preset length is 1420mm. The roll profile curves (as shown in fig. 12) can be obtained by inputting the roll profile parameters into a computer system. And providing the roll profile curve between the grinding rolls to finish grinding of the working rolls. The working rolls are put into the frame structure debugging of 1420 acid tandem rolling units S1 and S2, after the debugging quantity of about 1 ten thousand tons is finished in the early stage, the silicon steel edge drop control effect is obviously improved, the production process is stable, and no broken belt occurs. Selecting the non-oriented silicon steel edge precipitation level of the roller type debugging front and back stages for comparison, and cold rolling convexity C 25 The proportion of less than or equal to 7 mu m is increased from 72 percent to 86 percent, C 25 The mean value is reduced from 6.3 μm to 5.2 μm; the ratio of the transverse common plate difference smaller than or equal to 7 mu m is increased from 52% to 68% above, and the average value of the transverse common plate difference is reduced from 7.1 mu m to 6.4 mu m. The transverse identical plate difference is the thickness difference of the cross section of the strip steel, and the edge drop is the thickness reduction of the edge part of the strip steelThe reduction of the edge drop improves the lateral co-plate difference.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (12)
1. The utility model provides a cold rolling mill work roll, its characterized in that, work roll's roll shape one side is first plain barrel section, the opposite side of roll shape includes:
a second flat roll segment, the first end of which is connected with the first flat roll segment;
the first end of the edge drop control section is tangent to the second end of the second flat roller section, the edge drop control section is an arc, and the circle center of the edge drop control section faces the working roller;
the first end of the breakage-proof belt control section is tangent to the second end of the edge drop control section, the breakage-proof belt control section is in an arc shape, and the circle center of the breakage-proof belt control section is opposite to the working roller and is used for contacting with the edge of the strip steel when the working roller is in a working state;
the deviation control section is connected with the second end of the breakage-proof belt control section;
establishing a rectangular coordinate system by taking the axial center line of a roller shape as a Y axis and a flat roller section of the roller shape as an X axis;
drawing the breakage-proof control section through a second mathematical model, wherein the second mathematical model is as follows:
in the method, in the process of the invention,、/>respectively representing the abscissa and the ordinate of the circle center of the breakage-proof control section, and the +.>、/>Respectively representing the abscissa and the ordinate of the circle center of the side drop control section, wherein +.>Representing the second axial depth>A first radial depth is indicated and is indicated,representing a third axial depth->Representing a second radial depth;
the second axial depth is the distance between the second end of the edge drop control section and the Y axis, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, and the second radial depth is the distance between the second end of the breakage-proof tape control section and the X axis.
2. The work roll of claim 1 wherein the run-out control segment is a straight segment, the run-out control segment being tangential to the second end of the breakage prevention control segment.
3. The work roll of claim 1 wherein the second end of the drop control section is at a first radial depth of 60 from the second flat roll section～120/>The second radial depth of the second end of the breakage-proof strip control section from the second flat roller section is 100 +.>～160/>The difference between the second radial depth and the first radial depth is 0 +.>～40/>The method comprises the steps of carrying out a first treatment on the surface of the And/or
The axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section is 110-150 mm, and the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section is 15-30 mm.
4. A roll shape forming method of a work roll according to any one of claims 1 to 3, which is characterized in that a rectangular coordinate system is established with a roll axial center line of the roll shape as a Y axis and a flat roll section of the roll shape as an X axis, and the method comprises:
acquiring a preset width of the strip steel, a first preset length and a first radial depth of an edge drop control section, and a second preset length and a second radial depth of an anti-breakage control section; the first preset length is the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the second preset length is the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section, and the second radial depth is the distance between the second end of the breakage-proof belt control section and the X axis;
calculating the third axial depth of the breakage-preventing strip control section, the second axial depth of the edge drop control section and the first axial depth based on the preset width, the first preset length and the second preset length of the strip steel; the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, the second axial depth is the distance between the second end of the edge drop control section and the Y axis, and the first axial depth is the distance between the first end of the edge drop control section and the Y axis;
drawing the roll shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth and the second radial depth;
drawing the breakage-proof control section through a second mathematical model, wherein the second mathematical model is as follows:
in the method, in the process of the invention,、/>respectively representing the abscissa and the ordinate of the circle center of the breakage-proof control section, and the +.>、/>Respectively representing the abscissa and the ordinate of the circle center of the side drop control section, wherein +.>Representing the second axial depth->Representing said first radial depth, ++>Representing the third axial depth, +.>Representing the second radial depth.
5. The roll forming method of claim 4, further comprising:
obtaining a third preset length of the roller shape;
calculating a fourth axial depth of the deviation control section based on the third preset length; the fourth axial depth is the distance between the second end of the deviation control section and the Y axis;
calculating the slope of the deviation control section based on the circle center coordinate and the second end coordinate of the breakage prevention control section;
and drawing the deviation control section of the roll shape based on the slope of the deviation control section and the fourth axial depth.
6. The roll-forming method of claim 5, wherein the edge drop control segment is plotted by a first mathematical model, the first mathematical model being:
wherein the saidRepresenting said first axial depth, said +.>Representing said second axial depth, said ∈>Representing said first preset length, < > and->Representing the first radial depth.
7. The roll forming method of claim 6, wherein the breakage prevention control section is plotted by a third mathematical model, the third mathematical model being:
in the method, in the process of the invention,、/>representing a third radial depth and a second radial depth, respectively,/->Representing said fourth axial depth, +.>、And respectively representing the abscissa and the ordinate of the circle center of the breakage-proof belt control section.
8. A roll profile forming apparatus for a work roll according to any one of claims 1 to 3, which establishes a rectangular coordinate system with a roll axial center line of the roll profile as a Y axis and a flat roll segment of the roll profile as an X axis, the apparatus comprising:
the first acquisition module is used for acquiring the preset width of the strip steel, the first preset length and the first radial depth of the edge drop control section, and the second preset length and the second radial depth of the breakage prevention control section; the first preset length is the axial distance between the second end of the edge drop control section and the roller at the first end of the edge drop control section, the first radial depth is the distance between the second end of the edge drop control section and the X axis, the second preset length is the axial distance between the second end of the breakage-proof belt control section and the roller at the first end of the breakage-proof belt control section, and the second radial depth is the distance between the second end of the breakage-proof belt control section and the X axis;
the first calculation module is used for calculating the third axial depth of the breakage-proof strip control section, the second axial depth of the edge drop control section and the first axial depth based on the preset width, the first preset length and the second preset length of the strip steel; the third axial depth is the distance between the second end of the breakage-proof tape control section and the Y axis, the second axial depth is the distance between the second end of the edge drop control section and the Y axis, and the first axial depth is the distance between the first end of the edge drop control section and the Y axis;
the first drawing module is used for drawing the roller shape based on the first preset length, the first axial depth, the second axial depth, the third axial depth, the first radial depth and the second radial depth;
drawing the breakage-proof control section through a second mathematical model, wherein the second mathematical model is as follows:
in the method, in the process of the invention,、/>respectively representing the abscissa and the ordinate of the circle center of the breakage-proof control section, and the +.>、/>Respectively representing the abscissa and the ordinate of the circle center of the side drop control section, wherein +.>Representing the second axial depth->Representing said first radial depth, ++>Representing the third axial depth, +.>Representing the second radial depth.
9. The roll forming apparatus of claim 8, wherein the apparatus further comprises:
the second acquisition module is used for acquiring a third preset length of the roller shape;
the second calculating module is used for calculating the fourth axial depth of the deviation control section based on the third preset length; the fourth axial depth is the distance between the second end of the deviation control section and the Y axis;
the third calculation module is used for calculating the slope of the deviation control section based on the center coordinates and the second end coordinates of the breakage prevention control section;
and the second drawing module is used for drawing the deviation control section of the roll shape based on the slope of the deviation control section and the fourth axial depth.
10. A computer device, comprising: a memory and a processor in communication with each other, the memory having stored therein computer instructions which, upon execution, perform the roll forming method of any one of claims 4-7.
11. A computer-readable storage medium storing computer instructions for causing a computer to execute the roll forming method according to any one of claims 4 to 7.
12. A UCMW cold rolling mill, comprising a cold rolling mill work roll according to any of claims 1-3.
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