A cold rolling device with edge heating function

Abstract

The present invention relates to a cold rolling device with edge heating function in the field of aluminum strip cold rolling technology, comprising a mounting frame, wherein two working rollers for cold rolling materials are arranged at intervals on the inner side of the mounting frame, and the roller shafts of the working rollers are rotatably connected to the mounting frame, and the two working rollers are rollingly abutted against each other on the opposite sides thereof, and the roller shafts of the supporting rollers are rotatably connected to the mounting frame; it also comprises a power device capable of driving the working rollers to rotate, and a heating device for heating the corresponding ends of the working roller bodies. In the present invention, since the mounting member is correspondingly connected to the mounting groove, and the mounting groove is located on the end face of the working roller body, the mounting member is at least partially located inside the working roller body, so that the heat loss can be effectively reduced, and the technical problem of a large amount of heat being wasted in the prior art is solved, and the energy-saving effect is achieved, and the phenomenon of excessively high ambient air temperature will not occur.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum strip cold rolling, and in particular to a cold rolling device with an edge heating function. Background Art

[0002] During the cold rolling production process of aluminum strip, since the heat radiation at the edge of the working roll is greater than that in the middle, there will be a temperature difference between the end and the middle of the working roll body, that is, the temperature at the end of the working roll body is lower than that in the middle, which makes the thermal convexity of the end of the working roll body different from that of the middle. The thermal convexity of the end of the roll body is significantly smaller than that of the middle, which makes the reduction amount of the edge of the strip smaller than that of the middle, which leads to edge tightness during the rolling process of the aluminum strip, seriously affecting the plate shape of the strip and even causing accidents such as strip breakage.

[0003] To solve the above problems, it is generally necessary to heat the end of the working roll to 200-500 degrees Celsius, depending on the thickness of the aluminum strip and the rolling speed. Currently, there are several methods for heating the end of the working roll:

[0004] 1. Heating the end of the working roll body with hot air flow or hot oil mist: A hot air flow or hot oil mist nozzle is provided at the end of the working roll body, and the hot air flow or hot oil mist is directly blown to the end of the working roll body. Although this method can be heated online continuously, it still has the following shortcomings: 1. The hot air flow will accelerate the rapid evaporation of the rolling oil, increase the loss of the rolling oil, and increase the oil content in the surrounding air; 2. The hot air flow contacts the roll body for a short time and will be dispersed by the hot air flow behind, resulting in heat waste, and causing the surrounding air to rise, and even causing damage to the surrounding equipment or people. For example, Chinese patent documents such as patent publication numbers CN207103427U and CN108655175A.

[0005] 2. The end of the working roll body is heated by heat radiation. The feed side and the discharge side of the end of the working roll body are provided with guide pipes. A hot fluid flows in the guide pipes. The heat of the hot fluid is radiated to the surrounding air through the guide pipes. The end of the working roll body is heated by the surrounding hot air to achieve heating of the end of the working roll body. Although this method can be heated online continuously, it still has the following shortcomings: most of the heat is dissipated through the air, resulting in a large amount of heat waste and causing the surrounding air temperature to rise. For example, Chinese patent documents such as patent publication numbers CN102430570B and CN102179404B.

[0006] The above-mentioned methods also have the following shortcomings: 1. The heating devices are all located outside the end of the working roll body, and the strip is prone to scratch and collide with the heating device, causing damage to the heating device. Summary of the invention

[0007] The object of the present invention is to provide a cold rolling device with edge heating function in order to solve the above problems.

[0008] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0009] A cold rolling device with edge heating function, comprising a mounting frame, wherein two working rolls for cold rolling materials are arranged at intervals on the inner side of the mounting frame, and the roller shafts of the working rolls are rotatably connected to the mounting frame, and the two working rolls are both rollingly abutted against each other with support rolls on the opposite sides, and the roller shafts of the support rolls are rotatably connected to the mounting frame; and also comprising a power device capable of driving the working rolls to rotate, characterized in that: it also comprises a heating device for heating the corresponding ends of the working roll bodies;

[0010] The heating device includes a mounting piece with a magnetic conductive function, the mounting piece is sleeved with a coil, and the two ends of the coil are correspondingly connected to a power source, and mounting grooves for mounting the mounting piece are provided at both end surfaces of the working roll body and located outside the roll shaft of the working roll, and the mounting piece is correspondingly placed in the corresponding mounting grooves.

[0011] Preferably, the mounting piece is a tubular structure, the mounting groove is an annular groove coaxial with the working roll, and the mounting piece is sleeved on the inner groove wall of the mounting groove.

[0012] Preferably, the mounting member is a rod-shaped structure, and a plurality of the mounting members are arranged in an annular pattern with the corresponding central axis of the working roll as the center, and each mounting member is sleeved with a coil.

[0013] Preferably, the multiple coils in each heating device are connected in series.

[0014] Preferably, a plurality of coils in two heating devices at both ends of the roller body of each working roller are connected in series.

[0015] Preferably, a wire hole is provided in the middle of the working roll.

[0016] Preferably, the heating device also includes a support ring, which is sleeved on the corresponding working roll shaft, and a through hole is provided at the support ring corresponding to the mounting position, and the inner end of the mounting part passes through the corresponding through hole and is placed in the corresponding mounting groove.

[0017] Preferably, a heat insulating member is provided between the wall of the through hole and the corresponding mounting member shaft.

[0018] Preferably, the support ring is sleeved on the corresponding working roll shaft, the mounting groove is an annular groove coaxial with the working roll, the inner end of the mounting piece is movably inserted into the corresponding mounting groove, and the notch of the mounting groove is sealingly rotatably connected to the support ring, and the support ring is fixedly connected to the mounting frame accordingly.

[0019] Preferably, the heating device also includes a brush slip ring arranged at the outer end of the working roll shaft, and the brush slip ring is coaxially arranged with the working roll shaft, the coil is connected to the power supply through the brush slip ring, the mounting groove is a socket structure, and the inner end of the mounting piece is correspondingly plugged into the corresponding mounting groove.

[0020] The beneficial effects are:

[0021] 1. Since the mounting piece is connected to the mounting groove correspondingly, and the mounting groove is located on the end surface of the working roll body, the mounting piece is at least partially located inside the working roll body, so that the heat loss can be effectively reduced, the technical problem of a large amount of heat being wasted in the prior art is solved, the energy-saving effect is achieved, and the phenomenon of excessively high ambient air temperature will not occur;

[0022] 2. Since the coil is energized to generate electromagnetic energy, the temperature of the mounting part with magnetic conductivity can be quickly increased. Since the mounting part is correspondingly connected to the end of the working roll body, the end of the working roll body can be quickly heated, which reduces the preheating time of the end of the working roll body;

[0023] 3. Since the portion where the heating device heats the end of the working roll body is located in the mounting groove, the technical problem in the prior art that the material is easily scratched and collided with the heating device is solved, thereby improving the safety factor.

[0024] The additional technical features and advantages of the present invention will be more clearly explained in the following description, or can be understood through the specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is an exploded schematic diagram of the first structure of the working roll and the heating device in the present invention;

[0028] Figure 3 It is an exploded schematic diagram of the second structure of the working roll and the heating device in the present invention;

[0029] Figure 4 It is an exploded schematic diagram of the third structure of the working roll and the heating device in the present invention;

[0030] Figure 5 Is a schematic diagram of the heating device structure of the present invention;

[0031] Figure 6It is a cross-sectional view of a third structure of the working roll and the heating device in the present invention;

[0032] Figure 7 It is a cross-sectional view of the fourth structure of the working roll and the heating device in the present invention.

[0033] The following are the descriptions of the reference numerals:

[0034] 1. Working roller; 11. Mounting groove; 12. Wire hole; 2. Heating device; 21. Mounting piece; 22. Coil; 23. Support ring; 24. Heat insulation piece; 25. Brush slip ring; 3. Mounting frame; 4. Support roller. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Embodiment 1, as Figure 1-7 As shown, a cold rolling device with edge heating function includes a mounting frame 3, two working rolls 1 for cold rolling materials are arranged at intervals on the inner side of the mounting frame 3, and the roller shafts of the working rolls 1 are rotatably connected to the mounting frame 3, and the two working rolls 1 are rollingly contacted with support rolls 4 on the opposite sides, and the roller shafts of the support rolls 4 are rotatably connected to the mounting frame 3; it also includes a power device capable of driving the working rolls 1 to rotate, and is characterized in that it also includes a heating device 2 for heating the corresponding roller body ends of the working rolls 1;

[0038] The heating device 2 includes a mounting member 21 with a magnetic conductivity function. Preferably, the mounting member 21 is made of iron material, and the mounting member 21 is sleeved with a coil 22. Preferably, a heat insulation layer is provided between the mounting member 21 and the coil 22 to prevent the coil from being damaged, and the two ends of the coil 22 are correspondingly connected to a power source. Preferably, the power source adopts a power supply device that can control the current. Both end surfaces of the roller body of the working roller 1 and the positions located outside the roller shaft of the working roller 1 are provided with mounting grooves 11 for installing the mounting member 21, and the mounting member 21 is correspondingly placed in the corresponding mounting groove 11. Preferably, a temperature sensor is installed in the mounting groove 11. Specifically, a sealing member can be provided at the notch of the mounting groove 11. At this time The inner cavity of the installation groove 11 can be filled with heat transfer oil. At this time, the installation member 21 is connected to the groove wall of the installation groove 11 through a heat insulation member. The heat of the installation member 21 is transferred to the end of the roller body of the working roll 1 through the heat transfer oil, so that the end of the roller body of the working roll 1 is heated evenly. The groove of the installation groove 11 may also be provided with no sealing member. At this time, preferably, the installation member 21 is in direct contact with the groove wall of the installation groove 11; specifically, the installation member 21 can be completely located in the inner cavity of the corresponding installation groove 11, or partially located in the inner cavity of the installation groove 11. When the installation member 21 is partially located in the inner cavity of the installation groove 11, preferably, the surface of the installation member 21 located outside the installation groove 11 is provided with a heat insulation layer, and the coil 22 is also located outside the installation groove 11;

[0039] In this arrangement, since the mounting member 21 is connected to the mounting groove 11 correspondingly, and the mounting groove 11 is located on the end surface of the roller body of the working roll 1, the mounting member 21 is at least partially located inside the roller body of the working roll 1, so that the heat loss can be effectively reduced, and the technical problem of a large amount of heat being wasted in the prior art is solved, and the energy-saving effect is achieved, and the phenomenon of excessively high ambient air temperature will not occur; since the coil 22 is energized to generate electromagnetic, the temperature of the mounting member with magnetic conductivity can be quickly increased, and since the mounting member is correspondingly connected to the end of the roller body of the working roll, the end of the roller body of the working roll 1 can be quickly heated, reducing the time for preheating the end of the roller body of the working roll.

[0040] In the above structure, when in use, the coil 22 is energized by a power supply, thereby generating a magnetic field inside the coil 22, so that the temperature of the mounting member 21 with a magnetic conductivity function can be quickly increased. Since the temperature of the mounting member 21 increases, the mounting member 21 transmits the temperature to the end of the roller body of the working roll 1, so that the temperature of the end of the roller body of the working roll 1 increases, thereby realizing the function of heating the edge of the working roll 1.

[0041] Embodiment 2, based on embodiment 1, as Figure 2As shown, the mounting member 21 is a tubular structure, the mounting groove 11 is an annular groove coaxial with the working roll 1, and the mounting member 21 is sleeved on the inner groove wall of the mounting groove 11. Specifically, the notch of the mounting groove 11 is located at the end face of the roller body of the working roll 1. Preferably, the notch of the mounting groove 11 is sealed with a plugging member, and the inner cavity of the mounting groove 11 is filled with heat transfer oil. Further, the inner and outer annular surfaces of the mounting member 21 are both provided with a heat insulation layer. In this way, the coil 22 is energized to heat the mounting member 21, and the mounting member 21 increases the temperature of the heat transfer oil, thereby increasing the roller body of the working roll 1. The end portion is heated up, and due to the setting of the heat transfer oil, the end portion of the roller body of the working roll 1 is heated evenly, so that when there is no heat transfer oil, the inner ring surface of the mounting member 21 fits against the groove wall of the first mounting groove 1111, and the inner ring surface of the mounting member 21 is not provided with a heat insulation layer. When the mounting member 21 rotates together with the working roll 1, the sealing member is sealed and connected to the groove opening of the mounting groove 11. When the mounting member 21 does not rotate at all, the mounting member 21 is rotatably sleeved on the inner groove wall of the mounting groove 11, and the sealing member is sealed and rotatably connected to the groove opening of the mounting groove 11, and the mounting member 21 is fixedly connected to the sealing member accordingly.

[0042] Embodiment 3, based on embodiment 1, Figure 3-7 As shown, the mounting member 21 is a rod-shaped structure, and a plurality of mounting members 21 are arranged in an interval ring with the corresponding central axis of the working roll 1 as the center, and each mounting member 21 is sleeved with a coil 22; preferably, the rod-shaped structure can be a straight rod or a U-shaped rod. When it is a straight rod, one end of the rod-shaped structure is correspondingly connected to the corresponding mounting groove 11. At this time, preferably, the rod-shaped structure is arranged in an interval ring with the corresponding central axis of the working roll 1 as the center. When it is a U-shaped rod, the two ends of the open end of the rod-shaped structure are correspondingly connected to the corresponding mounting groove 11. At this time, preferably, the ends of the open end of the rod-shaped structure are arranged in an interval ring with the corresponding central axis of the working roll 1 as the center. At this time, the coil 22 is correspondingly located on the outside of the roller body of the working roll 1. Preferably, a protective shell can be provided outside the coil 22. The protective shell is annular at this time and is movably sleeved on the roller shaft of the working roll 1. This arrangement allows the roller body end of the working roll 1 to be heated more evenly.

[0043] Embodiment 4, based on embodiment 3, Figure 6-7 As shown, a plurality of coils 22 in each heating device 2 are connected in series. Preferably, each coil 22 has the same number of turns. This arrangement makes the temperature change of each mounting member 21 consistent, and further makes the end of the working roll 1 heated more evenly.

[0044] The multiple coils 22 in the two heating devices 2 at the two ends of the roll body of each working roll 1 are connected in series. This arrangement allows the two ends of the roll body of the same working roll 1 to be heated in roughly the same manner.

[0045] A wire hole 12 is provided in the middle of the working roller 1. Preferably, the coils 2 in the two heating devices 2 are connected by wires. Preferably, the wires are connected by wiring terminals, which facilitates the disassembly of the heating device 2 and does not cause damage to the wires due to insufficient length.

[0046] Embodiment 5, based on embodiment 3, Figure 3-6 As shown, the heating device 2 also includes a support ring 23, which is sleeved on the corresponding roller shaft of the working roll 1, and a through hole is provided at the position of the support ring 23 corresponding to the mounting member 21, and the inner end of the mounting member 21 passes through the corresponding through hole and is placed in the corresponding mounting groove 11. Such a setting can be fixed and limited by multiple mounting members 21, and the mounting members 21 can be prevented from contacting each other in different directions. Preferably, the support ring 23 is made of insulating and heat-resistant material;

[0047] A heat insulating member 24 is provided between the wall of the through hole and the shaft of the corresponding mounting member 21 .

[0048] Embodiment 6, based on embodiment 5, Figure 3 As shown, the support ring 23 is sleeved on the corresponding roller shaft of the working roll 1, the mounting groove 11 is an annular groove coaxial with the working roll 1, the inner end of the mounting member 21 is movably inserted into the corresponding mounting groove 11, and the notch of the mounting groove 11 is sealed and rotatably connected with the support ring 23, and the support ring 23 is fixedly connected to the mounting frame 3 accordingly. Preferably, the inner cavity of the mounting groove 11 is filled with heat transfer oil, so that when the working roll 1 is rolled, the heating device 2 is kept in a fixed position, so that the end of the roller body of the working roll 1 is heated more evenly. Preferably, the mounting member 21 is provided with a heat dissipation fin at the position in the mounting groove 11, and the heat dissipation fin is in a ring shape, a spiral shape, etc.;

[0049] When the brush slip ring 25 is present, the support ring 23 is sealed and fixedly connected to the notch of the installation groove 11 in correspondence.

[0050] Embodiment 7, based on embodiment 3, Figure 4-6 As shown, the heating device 2 also includes a brush slip ring 25 arranged at the outer end of the roller shaft of the working roll 1, and the brush slip ring 25 is coaxially arranged with the roller shaft of the working roll 1, the coil 22 is connected to the power supply through the brush slip ring 25, the mounting groove 11 is a socket structure, the inner end of the mounting member 21 is correspondingly plugged into the corresponding mounting groove 11, preferably, the hole of the mounting groove 11 is filled with heat transfer oil, and a sealing member is provided between the orifice of the mounting groove 11 and the corresponding bending portion, preferably, the bending portion is a conical structure, and the outer end of the bending portion is a small head end, further, the position of the bending portion in the mounting groove 11 is provided with a heat sink for assisting the bending portion in dissipating heat, preferably, the heat sink is a convex point, a concave point, a convex ridge, annular heat dissipation fins, spiral heat dissipation fins, preferably, the bending portion is along the direction from the bottom of the hole of the mounting groove 11 to the orifice of the mounting groove 11, and the surface area of ​​the outer surface of the bending portion gradually increases.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cold rolling device with an edge heating function, comprising a mounting frame (3), wherein two working rollers (1) for cold rolling materials are arranged at intervals on the inner side of the mounting frame (3), and the roller shafts of the working rollers (1) are rotatably connected to the mounting frame (3), and the two working rollers (1) are both rollingly abutted against each other on the opposite sides thereof, and the roller shafts of the supporting rollers (4) are rotatably connected to the mounting frame (3); and further comprising a power device capable of driving the working rollers (1) to rotate, characterized in that: It also includes a heating device (2) for heating the end of the roller body of the corresponding working roller (1); The heating device (2) comprises a mounting member (21) having a magnetic conductivity function, the mounting member (21) being sleeved with a coil (22), and the two ends of the coil (22) being correspondingly connected to a power source, mounting grooves (11) for mounting the mounting member (21) are provided at positions on both end surfaces of the roller body of the working roller (1) and located outside the roller shaft of the working roller (1), and the mounting member (21) is correspondingly placed in the corresponding mounting grooves (11); The mounting member (21) is a rod-shaped structure, and a plurality of the mounting members (21) are provided in an annular manner with the central axis of the corresponding working roll (1) as the center, and each mounting member (21) is sleeved with a coil (22), and the coil (22) is correspondingly located on the outside of the roll body of the working roll (1); The heating device (2) further comprises a support ring (23), the support ring (23) being rotatably connected to a notch of the mounting groove (11) in a sealing manner, the support ring (23) being sleeved on a corresponding roller shaft of the working roll (1), and a through hole is provided in the support ring (23) at a position corresponding to the mounting member (21), and an inner end of the mounting member (21) passes through the corresponding through hole and is placed in the corresponding mounting groove (11); Wherein, a heat insulating member (24) is provided between the wall of the through hole and the shaft of the corresponding mounting member (21).

2. A cold rolling device with edge heating function according to claim 1, characterized in that: The plurality of coils (22) in each heating device (2) are connected in series.

3. The cold rolling device with edge heating function according to claim 1, characterized in that: A plurality of coils (22) in two heating devices (2) at both ends of the roller body of each working roller (1) are connected in series.

4. The cold rolling device with edge heating function according to claim 3, characterized in that: A guide wire hole (12) is provided in the middle of the working roller (1).

5. The cold rolling device with edge heating function according to claim 1, characterized in that: The mounting groove (11) is an annular groove coaxial with the working roll (1), the inner end of the mounting member (21) is movably inserted into the corresponding mounting groove (11), and the support ring (23) is fixedly connected to the mounting frame (3) accordingly.

6. The cold rolling device with edge heating function according to claim 3, characterized in that: The heating device (2) further comprises a brush slip ring (25) arranged at the outer end of the roller shaft of the working roller (1), and the brush slip ring (25) is coaxially arranged with the roller shaft of the working roller (1), the coil (22) is connected to a power source via the brush slip ring (25), the mounting groove (11) is a socket structure, and the inner end of the mounting member (21) is correspondingly plugged into the corresponding mounting groove (11).

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