An electroplastic shape control roll system with independent control for horizontal zoning

Abstract

A system of electroplastic shape control roll with independent transverse zone control provided by the present invention belongs to the technical field of strip rolling equipment. It includes a shape control roll mandrel, a conductive copper ring, an insulating ceramic ring, a shock-absorbing rubber sleeve, an insulating ceramic roll sleeve, a conductive rotary joint, etc. This system constructs a transverse zone electroplastic shape control roll through alternately arranged conductive copper rings and insulating ceramic rings. During operation, the strip wraps around the electroplastic shape control roll with a certain wrap angle above it to ensure close contact between the strip and the conductive copper ring. Using the principle that the resistance of the conductive copper ring-strip-adjacent conductive copper ring is the smallest, the on-off control of each group of independent conductive copper rings is carried out through an external control circuit, so as to realize the electroheating effect at different positions along the width direction of the strip, change the plastic state of the strip entering the rolling deformation zone, affect the rolling pressure in the deformation zone, and finally achieve the purpose of online shape regulation.

Description

Technical Field

[0001] The present invention belongs to the technical field of strip rolling equipment, and particularly relates to an electroplastic shape control roll system with independent control for transverse zoning. Background Art

[0002] Strip shape is an important index for strip quality, and flatness control is an important aspect for improving strip shape quality. Local defects in strip shape are essentially caused by excessive rolling pressure per unit width at corresponding positions in the rolling deformation zone, resulting in an increase in longitudinal elongation of the strip and ultimately buckling instability to generate waviness.

[0003] For traditional cold rolling, the main shape control means include roll bending force, intermediate roll shifting and transverse movement, tilting roll, segmented cooling, large tension rolling, etc. for shape control. However, the effects of bending force and roll shifting on shape control are mainly reflected at the edges, the tilting roll mainly controls the shape wedge, the segmented cooling mainly controls high-order waviness, and it belongs to a near-steady-state regulation process with poor real-time performance. Large tension is beneficial to reducing the rolling force, but has poor fine control ability for local shape. Therefore, with a certain rolling mill structure, the regulation range of conventional shape control means is certain, and its action range in the strip width direction is limited. With the development of sheet rolling towards extremely thin, extremely hard, extremely wide, and center convexity to edge thinning control, complex high-order waves and the coupling phenomenon of flatness and cross-sectional profile regulation are very likely to occur during the production process, and there is an urgent need to develop new shape control means.

[0004] The above-mentioned traditional shape regulation means mainly adjust the rolling pressure in the strip deformation zone by changing the transverse stiffness of the roll gap, the longitudinal tensile stress distribution, etc. In fact, in addition to the transverse distribution of the roll gap and the front and rear tensile stresses, the plastic characteristic parameters of the strip also affect the magnitude of the rolling force in the deformation zone. By changing the yield stress of the strip in the rolling deformation zone, the formability of the material is also changed, so as to change the distribution of the rolling pressure, thereby realizing shape and quality control. In recent years, the electroplastic theory and technology have developed rapidly, but the current traditional current loading device cannot achieve precise and active control of electroplasticity at local positions along the strip width direction, and there is also a lack of a clear and advanced electric control system. Summary of the Invention

[0005] In order to solve the shortcomings and deficiencies of the prior art, an electroplastic shape control roll system with independent control for transverse zoning is provided, so as to solve the problems that the current traditional current loading device cannot achieve precise and active control of electroplasticity at local positions along the strip width direction and also lacks an electric control system.

[0006] A electroplastic shape control roll system with independent transverse zoning control provided for achieving the purpose of the present invention includes a shape control roll mandrel. The two ends of the shape control roll mandrel are respectively inserted into bearing seats for fixation. Bearings are arranged between the two ends of the shape control roll mandrel and the bearing seats. Conductive rotary joints are respectively sleeved on the outer walls of the two end parts of the shape control roll mandrel. A plurality of conductive copper rings are sleeved on the outer wall of the middle part of the shape control roll mandrel. Insulating ceramic rings are arranged between adjacent conductive copper rings to isolate the conductive copper rings from each other. A plurality of channels are formed inside the shape control roll mandrel. Insulated wires are arranged in the channels. One end of each insulated wire is connected to the inner wall of a conductive copper ring, and the other end is connected to a conductive rotary joint for current transmission. The conductive rotary joints are communicated with the main circuit and the control circuit to realize the on-off control of different conductive copper rings.

[0007] As a further improvement of the above solution, an insulating ceramic roll sleeve is arranged between the outer wall of the shape control roll mandrel and the inner walls of the conductive copper rings and the insulating ceramic rings for realizing insulation between the shape control roll mandrel and the conductive copper rings.

[0008] As a further improvement of the above solution, a shock-absorbing rubber sleeve is arranged between the outer wall of the shape control roll mandrel and the inner wall of the insulating ceramic roll sleeve for realizing shock absorption during the movement of the shape control roll mandrel, the conductive copper rings and the insulating ceramic rings.

[0009] As a further improvement of the above solution, the position of the shock-absorbing rubber sleeve is limited by a key between its outer wall and the inner wall of the insulating ceramic roll sleeve.

[0010] As a further improvement of the above solution, the main circuit includes a power supply, a first multi-way contactor, a second multi-way contactor and a multi-way thermal relay heating coil. The positive pole of the power supply is respectively connected to one end of the first multi-way contactor. The other end of the first multi-way contactor is connected to the conductive rotary joint at one end of the shape control roll mandrel. The negative pole of the power supply is connected to one end of the multi-way thermal relay heating coil. The other end of the multi-way thermal relay heating coil is connected to one end of the second multi-way contactor. The other end of the second multi-way contactor is connected to the conductive rotary joint at the other end of the shape control roll mandrel. The conductive rotary joints at the two ends of the shape control roll mandrel are respectively connected to the corresponding conductive copper rings through insulated wires.

[0011] As a further improvement of the above solution, a multi-way fuse is arranged on the line connecting the positive pole of the power supply and the first multi-way contactor in the main circuit to protect the normal operation of the main circuit.

[0012] As a further improvement of the above solution, the control circuit includes a power supply, a PLC controller, multi-way contactor control coils, multi-way thermal relays, an output circuit fuse, and an input master command button; the pins X000 - X002 of the PLC controller are respectively connected to one ends of SB1 - SB3 in the input master command button, and the other ends of SB1 - SB3 in the input master command button are all connected to the pin COM of the PLC controller; the pin COM0 of the PLC controller is connected to one end of the output circuit fuse, the other end of the output circuit fuse is connected to the positive pole of the power supply, and the pins Y000 - Y00n of the PLC controller are respectively connected to one ends of KM1 - KM n in the multi-way contactor control coils, and the pins Y00(n + 1) - Y00(2n) of the PLC controller are respectively connected to one ends of KM 1a -KM na in the multi-way contactor control coils, one ends of KM 1a -KM na in the multi-way contactor control coils are respectively connected to one ends of KH 1a -KH na in the multi-way thermal relays, and the other ends of KM1 - KM n in the multi-way contactor control coils and the other ends of KH 1a -KH na in the multi-way thermal relays are all connected to the - pole of the power supply.

[0013] As a further improvement of the above solution, the lower parts of the conductive copper ring and the insulating ceramic ring should be immersed in an oil medium cooler for temperature reduction and cooling.

[0014] As a further improvement of the above solution, the maximum width of the conductive copper ring and the insulating ceramic ring is one-eighth of the strip width.

[0015] As a further improvement of the above solution, the power supply is a high-frequency pulse power supply.

[0016] The beneficial effects of the present invention are:

[0017] Compared with the prior art, a laterally partitioned and independently controlled electroplastic shape control roll system provided by the present invention arranges conductive copper rings and insulating ceramic rings at intervals, and uses a control circuit to construct a partitioned electroheating zone along the transverse direction of the strip to change the local plastic state of the strip, so as to affect the rolling pressure distribution in the deformation zone, and finally achieve the purpose of strip shape control, making up for the deficiencies of existing shape control means, being conducive to improving the control ability of the rolling mill for high-order complex strip shapes, and providing technical guarantee for the rolling of ultra-wide, high-strength, extremely thin and high-quality strip materials; at the same time, since the strip cross-section microscopically presents a convexity distribution, the overall roll body composed of segmented conductive copper rings is used as the basic structure of the system. On the premise of ensuring the system stiffness, a certain pressure is also applied to the strip, thereby ensuring the close contact between the conductive copper ring and the strip during the working process; in addition, this system can be used as a coiling guide roll, a tension measuring roll, a loop roll between stands, etc., with a simple structure, reliable electric control, and fast electroheating speed, which can meet the requirements of online rapid shape regulation, and can be used for the online electroplastic requirements of high-strength and difficult-to-deform metals and near-isothermal rolling strips with a narrow temperature window.

[0018] In summary, the present system constructs a laterally partitioned electroplastic shape control roll through alternately arranged conductive copper rings and insulating ceramic rings. During operation, the strip wraps around the electroplastic shape control roll with a certain wrap angle to ensure close contact between the strip and the conductive copper ring. Utilizing the principle that the resistance between the conductive copper ring - strip - adjacent conductive copper ring is the smallest, the on-off control of each group of independent conductive copper rings is carried out through an external control circuit, so as to achieve the electroheating effect at different positions along the width direction of the strip, change the plastic state of the strip entering the rolling deformation zone, affect the rolling pressure in the deformation zone, and finally achieve the purpose of online shape regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the present invention;

[0020] Figure 2 is a top view of the present invention;

[0021] Figure 3 is Figure 2 a sectional view taken along A-A in

[0022] Figure 4 is Figure 3 an enlarged view of the circle B in

[0023] Figure 5 is a structural schematic diagram of the shape control roll mandrel and the shock-absorbing rubber sleeve in the present invention;

[0024] Figure 6 is a top view of the shape control roll mandrel and the shock-absorbing rubber sleeve in the present invention;

[0025] Figure 7 is Figure 6Schematic diagram of the C-C section;

[0026] Figure 8 Schematic diagram of the shock-absorbing rubber sleeve in the present invention;

[0027] Figure 9 Schematic diagram of the insulating ceramic roller sleeve in the present invention;

[0028] Figure 10 Schematic diagram of the main circuit wiring and hardware connection in the present invention;

[0029] Figure 11 Schematic diagram of the control circuit wiring and hardware connection in the present invention.

[0030] Among them, 1 - strip shape control roller core shaft; 2 - conductive copper ring; 3 - insulating ceramic ring; 4 - bearing seat; 5 - insulating wire; 6 - shock-absorbing rubber sleeve; 7 - insulating ceramic roller sleeve; 8 - power supply; 9 - key; 10 - conductive rotary joint; 11 - duct; 701 - multi-way contactor; 702 - multi-way fuse; 703 - multi-way contactor; 704 - multi-way thermal relay heating coil; 901 - PLC controller; 902 - multi-way contactor control coil; 903 - multi-way thermal relay; 904 - output circuit fuse; 905 - input master button. Specific embodiments

[0031] The following further details the specific embodiments of the present invention with reference to the accompanying drawings:

[0032] According to Figures 1-11 As shown, the present invention provides an electroplastic strip shape control roller system with independent lateral zoning control, including a strip shape control roller core shaft 1. The two ends of the strip shape control roller core shaft 1 are respectively inserted into the bearing seats 4 for fixation. Bearings are provided between the two ends of the strip shape control roller core shaft 1 and the bearing seats 4 to improve the smoothness of the rotation of the strip shape control roller core shaft 1. Conductive rotary joints 10 are respectively sleeved on the outer walls of the two ends of the strip shape control roller core shaft 1. A plurality of conductive copper rings 2 are sleeved on the outer wall of the middle part of the strip shape control roller core shaft 1. Insulating ceramic rings 3 are provided between adjacent conductive copper rings 2 to isolate the conductive copper rings 2 from each other. The maximum width of the conductive copper rings 2 and the insulating ceramic rings 3 is one-eighth of the width of the strip. A plurality of ducts 11 are opened inside the strip shape control roller core shaft 1. Insulating wires 5 are arranged in the ducts 11. One end of the insulating wire 5 is connected to the inner wall of the conductive copper ring 2, and the other end is connected to the conductive rotary joint 10 for current transmission. The conductive rotary joint 10 is connected to the main circuit and the control circuit to realize the on-off control of different conductive copper rings 2. The conductive copper rings 2 and the insulating ceramic rings 3 should be immersed in the oil medium cooler below for cooling.

[0033] An insulating ceramic roller sleeve 7 is provided between the outer wall of the roll core 1 for shape control and the inner walls of the conductive copper ring 2 and the insulating ceramic ring 3 to achieve insulation between the roll core 1 for shape control and the conductive copper ring 2. A shock-absorbing rubber sleeve 6 is provided between the outer wall of the roll core 1 for shape control and the inner wall of the insulating ceramic roller sleeve 7 to achieve shock absorption during the movement of the roll core 1 for shape control, the conductive copper ring 2, and the insulating ceramic ring 3. The position between the outer wall of the shock-absorbing rubber sleeve 6 and the inner wall of the insulating ceramic roller sleeve 7 is limited by a key 9.

[0034] The main circuit includes a power supply 8, a first multi-way contactor 701, a second multi-way contactor 703, and a multi-way thermal relay heating coil 704. The positive pole of the power supply 8 is respectively connected to one end of the first multi-way contactor 701, the other end of the first multi-way contactor 701 is connected to the conductive rotary joint 10 at one end of the roll core 1 for shape control, the negative pole of the power supply 8 is connected to one end of the multi-way thermal relay heating coil 704, the other end of the multi-way thermal relay heating coil 704 is connected to one end of the second multi-way contactor 703, the other end of the second multi-way contactor 703 is connected to the conductive rotary joint 10 at the other end of the roll core 1 for shape control, and the conductive rotary joints 10 at both ends of the roll core 1 for shape control are respectively connected to the corresponding conductive copper rings 2 through insulating wires 5. A multi-way fuse 702 is provided on the line connecting the positive pole of the power supply 8 and the first multi-way contactor 701 in the main circuit to protect the normal operation of the main circuit. The power supply 8 is a high-frequency pulse power supply, and its controllable parameters include output voltage, output current, pulse frequency, pulse width, and duty cycle. During operation, the conductive rotary joint 10 at one end of the roll core 1 for shape control is connected to the positive pole of the power supply 8 through a wire, and the conductive rotary joint 10 at the other end is also connected to the negative pole of the power supply 8 through a wire. The number of branches where the above-mentioned conductive rotary joints 10 are connected to the positive and negative poles of the power supply 8 is equal to the number of conductive copper rings 6 in the middle of the roll core 1 for shape control, and each branch is insulated from each other. During operation, the control circuit should ensure that the two paths connecting the positive and negative poles of the power supply 8 to the same conductive copper ring 6 cannot be connected simultaneously.

[0035] The control circuit includes a power supply 8, a PLC controller 901, a multi-way contactor control coil 902, a multi-way thermal relay 903, an output circuit fuse 904, and an input master button 905; the pins X000 - X002 of the PLC controller 901 are respectively connected to one ends of SB1 - SB3 in the input master button 905, and the other ends of SB1 - SB3 in the input master button 905 are all connected to the pin COM of the PLC controller 901; the pin COM0 of the PLC controller 901 is connected to one end of the output circuit fuse 904, the other end of the output circuit fuse 904 is connected to the positive pole of the power supply 8, and the pins Y000 - Y00n of the PLC controller 901 are respectively connected to KM1 - KM in the multi-way contactor control coil 902 nOne end of it is connected. The pins Y00(n+1)-Y00(2n) of the PLC controller 901 are respectively connected to the corresponding ones among the control coils 902 of the multiple contactors KM 1a -KM na One end of it is connected. Among the control coils 902 of the multiple contactors, KM 1a -KM na The other ends are respectively connected to the corresponding ones among KH 1a -KH na One end of it is connected. The other ends of KM1-KM among the control coils 902 of the multiple contactors n The other ends of KH among the multiple thermal relays 903 1a -KH na The other ends are all connected to the - pole of the power supply 8. The power supply 8 herein is a high-frequency pulse power supply. During operation, the PLC controller 901 logically controls the on / off of the control coils 902 of the multiple contactors, and then controls the on / off of the circuit between the power supply 8 and each conductive copper ring 2 through the first contactor 701 and the second contactor 703. Finally, the electroplastic regulation of the strip is realized. The heating coils 704 of the multiple thermal relays in the main circuit affect the on / off of the multiple thermal relays 903 in the control circuit, and then control the temperature of the circuits of each conductive copper ring 2. When the temperature is too high, an open circuit is realized to prevent the circuit and components from being burned due to the long-term high temperature of the circuits of the conductive copper rings 2. The multiple fuses 702 in the main circuit prevent the circuit from short-circuiting or being severely overloaded, and prevent the circuit and components from being burned due to the instantaneous overcurrent of the circuits of the conductive copper rings 2. Through the control of the PLC controller 901, it is ensured that the conductive rotary joint 10 connected to any conductive copper ring 2 is connected to the power supply 8.

[0036] The axial width dimensions of the spaced-apart conductive copper rings 2 and insulating ceramic rings 3 can be uniformly arranged or non-uniformly arranged, but the maximum width is one-eighth of the width of the main rolling strip designed for the production line to meet the requirements of flatness control for more than 4 times.

[0037] Each conductive copper ring 2 can be independently controlled for on / off, and the power supply 8 can perform real-time control of electrical parameters. During operation, the strip is wrapped around the surface of the laterally partitioned and independently controlled conductive copper rings 2 with a certain wrap angle to ensure good contact between the strip and the surface of the conductive copper rings 2.

[0038] The above embodiments are not limited to the technical solutions of these embodiments themselves, and the embodiments can be combined with each other to form new embodiments. The above embodiments are only used to illustrate the technical solutions of the present invention and are not used to limit it. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of the technical solutions of the present invention.

Claims

1. An electroplastic plate shape control roller system with independent control of lateral partitions, characterized in that: The invention comprises a plate shape control roller core shaft (1), wherein the two ends of the plate shape control roller core shaft (1) are respectively inserted into a bearing seat (4) for fixing, and bearings are arranged between the two ends of the plate shape control roller core shaft (1) and the bearing seat (4), and conductive rotary joints (10) are respectively sleeved on the outer walls of the two ends of the plate shape control roller core shaft (1), and a plurality of conductive copper rings (2) are sleeved on the outer wall of the middle part of the plate shape control roller core shaft (1), and insulating ceramic rings (3) are arranged between adjacent conductive copper rings (2) so as to isolate the conductive copper rings (2), and a plurality of channels (11) are opened inside the plate shape control roller core shaft (1), and insulating wires (5) are arranged in the channels (11), and the insulating ceramic rings (3) are arranged between the conductive copper rings (2) and the conductive copper rings (2) are separated from each other. One end of the wire (5) is connected to the inner wall of the conductive copper ring (2), and the other end is connected to the conductive rotary joint (10) for transmitting current. The conductive rotary joint (10) is connected to the main circuit and the control circuit for realizing the on-off control of different conductive copper rings (2). The main circuit includes a power supply (8), a first multi-way contactor (701), a second multi-way contactor (703) and a multi-way thermal relay heating coil (704). The positive electrode of the power supply (8) is respectively connected to one end of the first multi-way contactor (701), and the other end of the first multi-way contactor (701) is connected to the conductive rotary joint (10) at one end of the plate shape control roller core shaft (1). The negative electrode is connected to one end of a multi-way thermal relay heating coil (704), the other end of the multi-way thermal relay heating coil (704) is connected to one end of a second multi-way contactor (703), the other end of the second multi-way contactor (703) is connected to a conductive rotary joint (10) at the other end of the plate shape control roller core shaft (1), and the conductive rotary joints (10) at both ends of the plate shape control roller core shaft (1) are respectively connected to corresponding conductive copper rings (2) through insulated wires (5); the control circuit comprises a power supply (8), a PLC controller (901), a multi-way contactor control coil (902), a multi-way thermal relay (903), an output circuit fuse (904), and an input master command button (905); pins X000-X002 of the PLC controller (901) are respectively connected to one end of SB1-SB3 in the input main command button (905), and the other ends of SB1-SB3 in the input main command button (905) are connected to pin COM of the PLC controller (901); pin COM0 of the PLC controller (901) is connected to one end of the output circuit fuse (904), and the other end of the output circuit fuse (904) is connected to the positive electrode of the power supply (8); pins Y000-Y00n of the PLC controller (901) are respectively connected to KM1-KM2 in the multi-way contactor control coil (902). n The pins Y00(n+1)-Y00(2n) of the PLC controller (901) correspond to the KM in the multi-way contactor control coil (902) respectively. 1a -KM na One end of the multi-way contactor control coil (902) is connected to KM 1a -KM na The other end corresponds to KH in the multi-way thermal relay (903) 1a -KH na One end of the multi-way contactor control coil (902) is connected to KM1-KM n The other end of the multi-way thermal relay (903) KH 1a -KH na The other end of each of the two plates is connected to the negative electrode of the power source (8); an insulating ceramic roller sleeve (7) is provided between the outer wall of the plate shape control roller core shaft (1) and the inner walls of the conductive copper ring (2) and the insulating ceramic ring (3), and is used to achieve insulation and heat insulation between the plate shape control roller core shaft (1) and the conductive copper ring (2); a shock-absorbing rubber sleeve (6) is provided between the outer wall of the plate shape control roller core shaft (1) and the inner wall of the insulating ceramic roller sleeve (7), and is used to achieve shock absorption when the plate shape control roller core shaft (1), the conductive copper ring (2) and the insulating ceramic ring (3) move.

2. The electroplastic plate shape control roller system with independent control of lateral partitions according to claim 1 is characterized by: The position between the outer wall of the shock-absorbing rubber sleeve (6) and the inner wall of the insulating ceramic roller sleeve (7) is limited by a key (9).

3. The electroplastic plate shape control roller system with independent control of lateral partitions according to claim 1, characterized in that: A multi-way fuse (702) is provided on the line connecting the positive electrode of the power source (8) in the main circuit and the first multi-way contactor (701) to protect the normal operation of the main circuit.

4. The electroplastic shape control roller system with independent control of transverse zones according to claim 1, characterized in that: The conductive copper ring (2) and the insulating ceramic ring (3) are immersed in an oil medium cooler for cooling.

5. The electroplastic shape control roller system with independent control of transverse zones according to claim 4, characterized in that: The maximum width of the conductive copper ring (2) and the insulating ceramic ring (3) is one eighth of the width of the strip.

6. The electroplastic shape control roller system with independent control of transverse zones according to claim 1, characterized in that: The power supply (8) is a high-frequency pulse power supply.

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