阅读说明：本技术 用于超薄铜合金板带材轧制的辊缝监测装置及其控制方法 (Roll gap monitoring device for rolling ultrathin copper alloy plate strip and control method thereof ) 是由 党淑娥 李辉 马玉霞 于 2021-08-10 设计创作，主要内容包括：用于超薄铜合金板带材轧制的辊缝监测装置及其控制方法,属于有色金属加工技术领域,解决超薄铜合金精密带材轧制过程中辊缝检测与控制的技术问题。解决方案为：活动C形架倒扣设置于固定底座的上方,辊缝仪安装于固定底座中,辊缝仪的步进电机通过丝杠螺母驱动调节丝杠沿竖直方向伸出或者缩回固定底座,调节丝杠驱动活动C形架沿导向孔向上或者向下运动；下测量臂水平设置,下测量臂的根部与固定底座侧壁的下部固定连接；上测量臂设置为L字形,上测量臂包括竖直部与水平部。控制方法包括以下步骤：建立辊系变形分析模型→计算出入口凸度遗传系数→建立出口凸度方程→设定板形板厚时序解耦补偿流程,保证超薄铜合金精密带材高强度的要求。(A roll gap monitoring device for rolling an ultrathin copper alloy plate strip and a control method thereof belong to the technical field of nonferrous metal processing and solve the technical problem of roll gap detection and control in the rolling process of an ultrathin copper alloy precision strip. The solution is as follows: the movable C-shaped frame is arranged above the fixed base in a back-off manner, the roll gap instrument is arranged in the fixed base, a stepping motor of the roll gap instrument drives an adjusting screw rod to extend out of or retract back into the fixed base along the vertical direction through a screw rod nut, and the adjusting screw rod drives the movable C-shaped frame to move upwards or downwards along the guide hole; the lower measuring arm is horizontally arranged, and the root of the lower measuring arm is fixedly connected with the lower part of the side wall of the fixed base; the upper measuring arm is set to be L-shaped and comprises a vertical part and a horizontal part. The control method comprises the following steps: establishing a roller system deformation analysis model → calculating the genetic coefficient of the inlet and outlet convexity → establishing an outlet convexity equation → setting a plate thickness time sequence decoupling compensation process, and ensuring the requirement of high strength of the ultrathin copper alloy precision strip.)

1. A roll gap monitoring devices for rolling of ultra-thin copper alloy plate strip, it includes unable adjustment base (1), activity C shape frame (2), measurement arm and roll gap appearance (4), the measurement arm includes measurement arm (31) and lower measurement arm (32), its characterized in that:

the fixed base (1) is horizontally arranged, guide holes (5) are respectively formed in the head side and the tail side of the fixed base (1), the movable C-shaped frame (2) is arranged above the fixed base (1) in an inverted manner, a through hole (6) is formed in the horizontal connecting part of the movable C-shaped frame (2) along the horizontal direction, a guide rod (7) is arranged on the movable C-shaped frame (2) corresponding to the guide holes (5), and the guide rod (7) is movably inserted into the guide holes (5); the roll gap instrument (4) is arranged in the fixed base (1), a lead screw nut is arranged on a stepping motor of the roll gap instrument (4), an adjusting lead screw (8) is arranged on the fixed base (1) along the vertical direction, the stepping motor drives the adjusting lead screw (8) to extend out of or retract into the fixed base (1) along the vertical direction through the lead screw nut, and the adjusting lead screw (8) drives the movable C-shaped frame (2) to move upwards or downwards along the guide hole (5);

the lower measuring arm (32) is horizontally arranged, and the root of the lower measuring arm (32) is fixedly connected with the lower part of the side wall of the fixed base (1); the upper measuring arm (31) is arranged to be L-shaped, the upper measuring arm (31) comprises a vertical portion and a horizontal portion, the lower end of the vertical portion is hinged to the lower end of the side wall of the movable C-shaped frame (2), a spring (9) is arranged between the middle of the vertical portion and the side wall of the movable C-shaped frame (2), a measuring sensor (10), a connector (11) and a roll gap control amplifier (12) are sequentially arranged at the upper end of the vertical portion in a penetrating mode through a through hole (6), the horizontal portion and the lower measuring arm (32) are arranged in the roll gap in a back-to-back mode, a gap is formed between the horizontal portion and the lower measuring arm (32), the upper surface of the horizontal portion and the lower surface of the lower measuring arm (32) are respectively provided with a working roll measuring ring (13), and the working roll measuring ring (13) is in contact with a corresponding working roll.

2. A roll gap monitoring device for ultra-thin copper alloy sheet strip rolling according to claim 1, characterized in that: the distance that the adjusting screw rod (8) extends out of the upper part of the fixed base (1) is the width of the gap between the movable C-shaped frame (2) and the fixed base (1).

3. A roll gap monitoring device for ultra-thin copper alloy sheet strip rolling according to claim 1, characterized in that: the roll gap control amplifier (12) comprises an impedance matching balance transformer (121), a zero adjusting device (122), an alternating current amplifier (123), a phase sensitive rectifier (124), a frequency generator (125) and an analog amplifier (126) which are connected in parallel.

4. A roll gap monitoring device for rolling of ultra-thin copper alloy sheet strip according to claim 3, characterized in that: the frequency of the frequency generator (125) is 20 KHz.

5. The control method of the roll gap monitoring device for rolling the ultra-thin copper alloy plate strip according to claim 1, characterized by comprising the steps of:

s1, establishing a roller system deformation analysis model, and performing off-line simulation calculation and analysis on the shape of the bearing roller gap to obtain the transverse rigidity of the rolling force, the transverse rigidity of each bending roller force and the influence coefficient parameters of the comprehensive roller shape;

s2, calculating an entrance convexity genetic coefficient through the measured parameters of entrance convexity, exit convexity, rolling force, roll bending force and roll shape;

s3, establishing an outlet convexity equation of the copper alloy plate strip:

C_h＝P/K_p-F_W/K_FW-F_M/K_FM＋K_CMRC_MR＋K_CBRC_BR＋K_CCVCC_CVC＋K_CHC_H；

in the formula, C_hIs the outlet convexity; p is rolling force; f_W、F_MBending force of the working roll and the intermediate roll; c_WR、C_MR、C_BRIs a comprehensive roll shape of a working roll, a middle roll and a supporting roll C_CVCThe roll shape of the working roll can be controlled, and the CVC roll shape is adopted; c_HIs the inlet convexity; k_P、K_FM、K_FWThe transverse rigidity of the rolling force, the transverse rigidity of the bending force of the working roll and the transverse rigidity of the bending force of the intermediate roll are obtained; k_CWR、K_CMR、K_CBRThe comprehensive roll shape influence coefficient of the working roll, the comprehensive roll shape influence coefficient of the intermediate roll and the comprehensive roll shape influence coefficient of the supporting roll are obtained; k_CCVCThe roll shape influence coefficient is controllable; k_CHThe genetic coefficient of the entrance convexity;

s4, setting a plate thickness time sequence decoupling compensation process: the method comprises the steps of material coming information collection → rolling procedure → pass distribution → roll gap detection → rolling pressure preliminary setting → rolling speed setting → tension setting → comprehensive roll shape calculation → plate shape distribution → roll gap bending and roll shifting setting → roll gap detection and press setting → sending of setting result → end of setting.

6. The control method of the roll gap monitoring device for rolling the ultra-thin copper alloy plate strip according to claim 5, characterized by comprising the following steps: in step S3, the roll gap setting needs to consider the original roll shape, the hot roll shape, and the worn roll shape of the roll in addition to the rolling force, and the roll shape elastic deformation caused by the rolling force needs to be calculated, and the roll bending force, the CVC roll shifting amount, the thermal expansion, and the wear influence need to be comprehensively considered.

Technical Field

The invention belongs to the technical field of nonferrous metal processing, and particularly relates to a roll gap monitoring device for rolling an ultrathin copper alloy plate strip and a control method thereof.

Background

With the continuous development of the electronic information industry, the demand of copper alloy plate and strip materials is rapidly increased, the requirements on the performance quality, the external dimensional precision, the surface quality and the like of copper alloys are more and more strict, and the requirements on the electrical conductivity and the thermal conductivity of the copper alloys are more and more high, and the strength of the copper alloys is also higher. The increasingly intense market competition and the application of various high and new technologies enable the transverse and longitudinal thickness precision of the plate strip to be higher and higher, and also promote the continuous forward development of the rolling mill type and model control technology.

The Shape (Shape) is an important quality index in the production process of the high-strength conductive ultrathin copper alloy precision strip, the Shape of the strip has a wide content, and the Shape comprises the overall Shape (transverse and longitudinal) and local defects of the strip from appearance representation; from the representation form, the plate shape is divided into an obvious plate shape and a potential plate shape. The convexity is a main index for evaluating the cross section shape of the strip, the convexity degree of the strip is reflected, the fluctuation of the longitudinal thickness directly determines the precision grade of the strip, however, the quality problem of the shape of the copper plate, the strip and the plate is troubled for a long time by copper alloy plate and strip production enterprises, when rolled pieces are rolled in rollers, all factors influencing the shape of the roll gap are factors influencing the plate shape, and the detection and control of the roll gap directly determine the plate shape of the plate and the strip.

Disclosure of Invention

In order to overcome the defects of the prior art and solve the technical problem of roll gap detection and control in the rolling process of ultrathin copper alloy precision strips, the invention provides a roll gap monitoring device for rolling ultrathin copper alloy plates and strips, so that the requirement of high strength of the ultrathin copper alloy precision strips is met.

The invention is realized by the following technical scheme.

A roll gap monitoring devices for rolling of ultra-thin copper alloy plate strip, it includes unable adjustment base, activity C shape frame, measuring arm and roll gap appearance, the measuring arm includes measuring arm and lower measuring arm, its characterized in that:

the fixed base is horizontally placed, guide holes are respectively formed in the head side and the tail side of the fixed base, the movable C-shaped frame is arranged above the fixed base in a reverse buckling mode, a through hole is formed in the horizontal connecting portion of the movable C-shaped frame in the horizontal direction, a guide rod is arranged on the movable C-shaped frame corresponding to the position of the guide holes, and the guide rod is movably inserted into the guide holes; the roll gap instrument is arranged in the fixed base, a lead screw nut is arranged on a stepping motor of the roll gap instrument, the adjusting lead screw is arranged on the fixed base along the vertical direction, the stepping motor drives the adjusting lead screw to extend out of or retract into the fixed base along the vertical direction through the lead screw nut, and the adjusting lead screw drives the movable C-shaped frame to move upwards or downwards along the guide hole;

the lower measuring arm is horizontally arranged, and the root of the lower measuring arm is fixedly connected with the lower part of the side wall of the fixed base; the upper measuring arm is arranged to be L-shaped and comprises a vertical part and a horizontal part, the lower end of the vertical part is hinged to the lower end of the side wall of the movable C-shaped frame, a spring is arranged between the middle of the vertical part and the side wall of the movable C-shaped frame, a measuring sensor, a coupler and a roll gap control amplifier are sequentially arranged at the upper end penetrating through the vertical part and through holes, the horizontal part and the lower measuring arm are arranged in a roll gap in a back-to-back mode, a gap is formed between the horizontal part and the lower measuring arm, a working roll measuring ring is respectively arranged on the upper surface of the horizontal part and the lower surface of the lower measuring arm, and the working roll measuring ring is in contact with a corresponding working roll.

Furthermore, the distance that the adjusting screw rod extends out of the upper part of the fixed base is the width of the gap between the movable C-shaped frame and the fixed base.

Further, the roll gap control amplifier comprises an impedance matching balance transformer, a zero adjusting device, an alternating current amplifier, a phase sensitive rectifier, a frequency generator and an analog amplifier which are connected in parallel.

Further, the frequency of the frequency generator is 20 KHz.

The control method of the roll gap monitoring device for rolling the ultrathin copper alloy plate strip comprises the following steps:

s1, establishing a roller system deformation analysis model, and performing off-line simulation calculation and analysis on the shape of the bearing roller gap to obtain the transverse rigidity of the rolling force, the transverse rigidity of each bending roller force and the influence coefficient parameters of the comprehensive roller shape;

s2, calculating an entrance convexity genetic coefficient through the measured parameters of entrance convexity, exit convexity, rolling force, roll bending force and roll shape;

s3, establishing an outlet convexity equation of the copper alloy plate strip:

C_h＝P/K_p-F_W/K_FW-F_M/K_FM＋K_CMRC_MR＋K_CBRC_BR＋K_CCVCC_CVC＋K_CHC_H；

in the formula, C_hIs the outlet convexity; p is rolling force; f_W、F_MBending force of the working roll and the intermediate roll; c_WR、C_MR、C_BRIs a comprehensive roll shape of a working roll, a middle roll and a supporting roll C_CVCThe roll shape of the working roll can be controlled, and the CVC roll shape is adopted; c_HIs the inlet convexity; k_P、K_FM、K_FWThe transverse rigidity of the rolling force, the transverse rigidity of the bending force of the working roll and the transverse rigidity of the bending force of the intermediate roll are obtained; k_CWR、K_CMR、K_CBRThe comprehensive roll shape influence coefficient of the working roll, the comprehensive roll shape influence coefficient of the intermediate roll and the comprehensive roll shape influence coefficient of the supporting roll are obtained; k_CCVCThe roll shape influence coefficient is controllable; k_CHThe genetic coefficient of the entrance convexity;

s4, setting a plate thickness time sequence decoupling compensation process: the method comprises the steps of material coming information collection → rolling procedure → pass distribution → roll gap detection → rolling pressure preliminary setting → rolling speed setting → tension setting → comprehensive roll shape calculation → plate shape distribution → roll gap bending and roll shifting setting → roll gap detection and press setting → sending of setting result → end of setting.

Further, in step S3, the roll gap setting needs to take into account not only the rolling force but also the original roll shape, the hot roll shape, and the worn roll shape of the roll, and the roll shape elastic deformation caused by the rolling force needs to be calculated, and the roll bending force, the CVC roll shifting amount, the thermal expansion, and the influence of wear need to be comprehensively considered.

Compared with the prior art, the invention has the beneficial effects that:

1. the roll gap monitoring and controlling device is used for directly measuring the working roll gap of the high-strength conductive high-precision ultrathin copper alloy rolling mill, and can keep the roll gap at a set value all the time without considering the influence of thermal expansion of a roll, elastic deformation of the rolling mill during working and the like on the roll gap caused by deformation heat in the rolling process of a rolled piece;

2. when the rolling pressure changes due to factors such as incoming material thickness fluctuation or performance inequality, the rolling rigid body can be deformed and the roll gap can be changed, and the equivalent stiffness of closed-loop control of the roll gap of the rolling mill is introduced, and the value is far larger than the natural stiffness of the rolling mill;

3. the device has quite strong deviation rectifying capability on the outlet deviation caused by the thickness deviation and the hardness change of the incoming material, and the control mode is close to the constant roll gap control;

4. the digital feedback is to send the thickness deviation signal to a stepping motor of the roll gap instrument, establish a new roll gap reference, and the roll gap change signal is subjected to closed-loop regulation through a measuring amplifier → a servo amplifier → a hydraulic servo valve → a hydraulic cylinder, so as to ensure that the originally set roll gap is unchanged;

5. the roll gap variation ratio is equal to 1. Compared with the simple roll gap control method of the screw-down position measurement, the capability of eliminating the deviation of the rolled strip is improved by more than 1.5 times.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a control flow diagram of the present invention.

In the figure: the measuring device comprises a fixed base 1, a movable C-shaped frame 2, an upper measuring arm 31, a lower measuring arm 32, a roll gap instrument 4, a guide hole 5, a through hole 6, a guide rod 7, an adjusting screw rod 8, a spring 9, a measuring sensor 10, a coupler 11, a roll gap control amplifier 12, an impedance matching balancing transformer 121, a zero adjusting device 122, an alternating current amplifier 123, a phase sensitive rectifier 124, a frequency generator 125, an analog amplifier 126 and a working roll measuring ring 13.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions.

A roll gap monitoring devices for rolling of ultra-thin copper alloy plate strip, it includes unable adjustment base 1, activity C shape frame 2, measuring arm and roll gap appearance 4, measuring arm includes measuring arm 31 and lower measuring arm 32, its characterized in that:

the fixed base 1 is horizontally placed, guide holes 5 are respectively formed in the head side and the tail side of the fixed base 1, the movable C-shaped frame 2 is arranged above the fixed base 1 in an inverted mode, a through hole 6 is formed in the horizontal connecting portion of the movable C-shaped frame 2 in the horizontal direction, a guide rod 7 is arranged on the movable C-shaped frame 2 corresponding to the guide holes 5, and the guide rod 7 is movably inserted into the guide holes 5; the roll gap instrument 4 is arranged in the fixed base 1, a lead screw nut is arranged on a stepping motor of the roll gap instrument 4, the adjusting lead screw 8 is arranged on the fixed base 1 along the vertical direction, the stepping motor drives the adjusting lead screw 8 to extend out of or retract into the fixed base 1 along the vertical direction through the lead screw nut, and the adjusting lead screw 8 drives the movable C-shaped frame 2 to move upwards or downwards along the guide hole 5;

the lower measuring arm 32 is horizontally arranged, and the root of the lower measuring arm 32 is fixedly connected with the lower part of the side wall of the fixed base 1; the upper measuring arm 31 is set to be L-shaped, the upper measuring arm 31 comprises a vertical portion and a horizontal portion, the lower end of the vertical portion is hinged to the lower end of the side wall of the movable C-shaped frame 2, a spring 9 is arranged between the middle of the vertical portion and the side wall of the movable C-shaped frame 2, a measuring sensor 10, a connector 11 and a roll gap control amplifier 12 are sequentially arranged on the upper end penetrating through the vertical portion and the through hole 6, the horizontal portion and the lower measuring arm 32 are arranged in the roll gap in a back-to-back mode, a gap is formed between the horizontal portion and the lower measuring arm 32, a working roll measuring ring 13 is respectively arranged on the upper surface of the horizontal portion and the lower surface of the lower measuring arm 32, and the working roll measuring ring 13 is in contact with a corresponding working roll.

Further, the distance that the adjusting screw 8 extends out of the upper part of the fixed base 1 is the width of the gap between the movable C-shaped frame 2 and the fixed base 1.

Further, the roll gap control amplifier 12 includes an impedance matching balancing transformer 121, a zero adjusting device 122, an ac amplifier 123, a phase sensitive rectifier 124, a frequency generator 125 and an analog amplifier 126 connected in parallel.

Further, the frequency of the frequency generator 125 is 20 KHz.

The technical requirements of the product are as follows: the material is C70250, the specification is 0.152mm multiplied by 410mm, the thickness precision is 2 percent, and the plate shape is as follows: width warpage is less than or equal to 0.05mm, lateral bending is less than 0.04mm, material state is TM03, and tensile strength sigma_b=670MPa～820MPa。

The control method of the roll gap monitoring device for rolling the ultrathin copper alloy plate strip comprises the following steps:

s1, establishing a roller system deformation analysis model, and performing off-line simulation calculation and analysis on the shape of the bearing roller gap to obtain the transverse rigidity of the rolling force, the transverse rigidity of each bending roller force and the influence coefficient parameters of the comprehensive roller shape; wherein the crimp tension is set at 23N/mm²～35N/mm²；

S2, calculating an entrance convexity genetic coefficient through the measured parameters of entrance convexity, exit convexity, rolling force, roll bending force and roll shape;

s3, establishing an outlet convexity equation of the copper alloy plate strip:

C_h＝P/K_p-F_W/K_FW-F_M/K_FM＋K_CMRC_MR＋K_CBRC_BR＋K_CCVCC_CVC＋K_CHC_H；

in the formula, C_hIs the outlet convexity; p is rolling force; f_W、F_MBending force of the working roll and the intermediate roll; c_WR、C_MR、C_BRIs a comprehensive roll shape of a working roll, a middle roll and a supporting roll C_CVCThe roll shape of the working roll can be controlled, and the CVC roll shape is adopted; c_HIs the inlet convexity; k_P、K_FM、K_FWThe transverse rigidity of the rolling force, the transverse rigidity of the bending force of the working roll and the transverse rigidity of the bending force of the intermediate roll are obtained; k_CWR、K_CMR、K_CBRThe comprehensive roll shape influence coefficient of the working roll, the comprehensive roll shape influence coefficient of the intermediate roll and the comprehensive roll shape influence system of the supporting rollCounting; k_CCVCThe roll shape influence coefficient is controllable; k_CHThe genetic coefficient of the entrance convexity; the roll gap setting needs to consider the original roll shape, the hot roll shape and the worn roll shape of the roll besides the rolling force, the elastic deformation of the roll shape caused by the rolling force needs to be calculated, the roll bending force, the CVC roll shifting amount, the thermal expansion and the wear influence need to be comprehensively considered, and the thickness C of the roll gap is finally determined_hA value of 0.153 mm;

s4, setting a plate thickness time sequence decoupling compensation process: the method comprises the steps of material coming information collection → rolling procedure → pass distribution → roll gap detection → rolling pressure preliminary setting → rolling speed setting → tension setting → comprehensive roll shape calculation → plate shape distribution → roll gap bending and roll shifting setting → roll gap detection and press setting → sending of setting result → end of setting. Wherein the rolling schedule is as follows: 15mm → 2.0mm → 0.6mm → 0.23mm → 0.152 mm.

And (3) detecting a product: randomly extracting 5 points for measuring the thickness of the rolled end face: 0.153mm, 0.151mm, 0.152mm, 0.151mm, 0.153mm, average thickness 0.152mm, σ_bAnd the steel plate is warped by 0.03mm in plate width and bent by 0.02mm under the condition of 710MPa, and meets the technical requirements of products.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.