Roller hot jacket dismounting and mounting equipment

Abstract

The utility model discloses roller hot jacket dismounting and mounting equipment which comprises a rack, a control box, an induction heating device, a lifting mechanism and a supporting mechanism, the lifting mechanism is fixed on the rack, a heating coil of the induction heating device is horizontally arranged, the heating coil is fixedly connected with the lifting mechanism through a support, and the heating coil is sleeved on a roller sleeve of a roller. The lifting mechanism drives the heating coil to do vertical reciprocating motion along the axis of the roller sleeve, the supporting mechanism is located under the heating coil and fixed to the rack through a support, the supporting mechanism vertically supports one end of the roller, the induction heating device and the lifting mechanism are electrically connected with the control box, and the control box is fixed to the rack. Compared with the prior art, the thermal sleeving device has the beneficial effects that the thermal sleeving device can perform thermal sleeving and thermal dismounting on the roller sleeve and the roller core, and is easy to operate, high in safety and low in cost.

Description

Technical Field

[0001] The utility model belongs to the field of steel rolling, and in particular relates to roller shrink-fitting and disassembly equipment. Background Art

[0002] Rollers are crucial components of rolling mills, used to produce continuous plastic deformation in metals. The roll's primary structure consists of a core and a sleeve. One method of connecting the core and sleeve is an interference fit. The sleeve is heated to expand its inner diameter, then placed over the core. As the sleeve cools, its inner diameter shrinks, forming a tight fit with the core. To facilitate positioning of the sleeve on the core, a boss is provided at one end of the core.

[0003] During the hot rolling process, rollers are subject to deformation, oxide deposition, and scratches on their surfaces due to factors such as pressure, temperature, and friction. These problems directly affect product size and surface quality. Therefore, the roller sleeves must be ground. When the sleeve thickness is ground to the minimum limit, the sleeve is deemed scrapped and needs to be replaced. Currently, replacing the sleeves involves removing the old sleeves and heat-fitting the new sleeves. Oxygen cutting is used to remove the old sleeves, which is unsafe and cannot guarantee the integrity of the roll core. Heat-fitting the new sleeves involves heating several sleeves in a bell-type annealing furnace. After heating to a certain temperature, the bell-type annealing furnace is closed, the heating hood is opened, and the suspended roll core is hooked with a long metal rod. The core is then quickly lowered to the center of the sleeve for heat-fitting. During this process, when the heating hood is turned on, a high-temperature radiation zone is formed within a 2-meter radius, creating a harsh operating environment for operators and requiring them to quickly fit the sleeves. Otherwise, the temperature drops too low to allow the core to be inserted into the sleeve.

[0004] To address the above issues, patent document CN211240157U discloses a roller sleeve induction heating machine, comprising a steel frame, an induction heating coil, and a cylinder. The steel frame is fixedly mounted on a plane, with a roller core mounting seat mounted on top. Two support columns are vertically mounted on the side ends of the steel frame, and a cylinder is fixedly mounted between the tops of the two support columns. An induction coil lifting guide rod is fixedly connected to the end of the cylinder's telescopic rod, and a roller sleeve bracket is mounted on the other end of the induction coil lifting guide rod. A cylinder is mounted on the roller sleeve bracket, and the outer end of the cylinder is mounted with an induction heating coil. This solution supports the roller sleeve by supporting the roller sleeve bracket and heats the roller sleeve via the heating coil mounted thereon. Since the roller sleeve bracket is connected to the telescopic rod of the cylinder, the roller sleeve bracket can drive the heated roller sleeve to fit with the roller core mounting seat, thereby completing the assembly of the roller sleeve and roller core relatively safely. However, there are some problems in the implementation of this solution: since the heating coil is fixed on the roller sleeve bracket, in order to heat the entire roller sleeve, the roller sleeve should be completely placed in the heating coil, resulting in poor adaptability to the roller sleeve size and difficulty in observing the status of the roller sleeve; since the heating coil needs to cover the entire roller sleeve, the size of the heating coil is required to be high, resulting in high cost, and large-sized heating coils have high energy consumption; since the roller sleeve bracket supports the weight of the entire roller sleeve, and the roller sleeve bracket lifts the guide rod and the telescopic rod of the cylinder through the induction coil, in order to bear the weight of the roller sleeve, the overall connection strength and cylinder performance requirements are high; when the roller core is supported on the roller core mounting seat, the roller core needs to pass through the roller sleeve bracket. Since the roller sleeve bracket blocks the line of sight, the roller core is easily stuck in the roller sleeve bracket; the method of separating the roller sleeve and the roller core after the sleeve is fitted is not stated. Utility Model Content

[0005] The purpose of the utility model is to overcome the problems of existing roller sleeve and roller core heat-shrink coupling equipment in terms of safety, energy consumption, cost, and ease of operation, and to provide a low-cost roller heat-shrink coupling and disassembly equipment that is easy to operate, highly safe, and can heat-shrink and disassemble roller sleeves and roller cores.

[0006] The utility model solves the technical problem by adopting the following technical solution: roller shrink sleeve disassembly and assembly equipment, including a frame, a control box, an induction heating device, a lifting mechanism and a supporting mechanism, the lifting mechanism is fixed on the frame, the heating coil of the induction heating device is horizontally arranged, the heating coil is fixedly connected to the lifting mechanism through a bracket, the heating coil is sleeved on the roller sleeve, the lifting mechanism drives the heating coil to perform vertical reciprocating motion along the axis of the roller sleeve, the supporting mechanism is located directly below the heating coil and is fixed to the frame through the bracket, the supporting mechanism vertically supports one end of the roller, the induction heating device and the lifting mechanism are electrically connected to the control box, and the control box is fixed to the frame.

[0007] Optionally, the supporting mechanism is mainly composed of a roller sleeve seat, which is provided with a roller core through hole, and a ledge is provided in the roller core through hole, which contacts the lower end surface of the roller sleeve, and the lower end of the roller core of the rolling roller passes through the roller core through hole.

[0008] Optionally, the lifting mechanisms are distributed on both sides of the heating coil.

[0009] Optionally, the distance between the heating coil and the outer wall of the roller sleeve is 2-4 cm.

[0010] Optionally, the lifting mechanism is a pneumatic lifting mechanism.

[0011] Optionally, a protective shell is provided on the heating coil of the induction heating device to concentrate heat toward the center, and a temperature sensor is provided on the protective shell, and the temperature sensor is electrically connected to the control box.

[0012] The usage of this utility model:

[0013] The roller sleeve and the roller core are heat-fitted together: the roller sleeve is lifted by a crane and placed on a supporting mechanism under the control of the operator. The supporting mechanism vertically supports one end of the roller sleeve to make the roller sleeve stand upright. The roller sleeve passes through the heating coil. The control box is used to control the induction heating device and the lifting mechanism. The heating power supply of the induction heating device supplies power to the heating coil. The lifting mechanism works and drives the heating coil to make vertical reciprocating motion along the axis of the roller sleeve. The roller sleeve is heated by the heating coil that moves up and down outside the roller sleeve. The heating coil heats for a certain period of time to expand the roller sleeve to the fitting size. The heating is continued to maintain the fitting size of the roller sleeve. The roller core is lifted by a crane and quickly inserted into the roller sleeve under the control of the operator. The boss on the roller core contacts the upper end face of the roller sleeve. The induction heating device and the lifting mechanism are turned off. The roller sleeve cools down after fitting. The roller sleeve and the roller core are tightly combined to form a roll. The roller is lifted off the roll by a crane under the control of the operator.

[0014] Thermal disassembly of the roll sleeve and roll core: Use a crane to lift the roll and place it on the supporting mechanism under the control of the operator. The supporting mechanism vertically supports one end of the roll to make the roll upright. The roll passes through the heating coil and the control box is used to control the induction heating device and the lifting mechanism. The heating power supply of the induction heating device supplies power to the heating coil. The lifting mechanism works and drives the heating coil to make vertical reciprocating motion along the axis of the roll sleeve. The roll sleeve is heated by the heating coil that moves up and down outside the roll sleeve. The heating coil heats for a certain period of time to expand the roll sleeve to the set size. Continuous heating maintains the set size of the roll sleeve. Under the control of the operator, use the crane to lift the roll core from the roll sleeve. During the lifting process, if the roll sleeve is unstable, a hook or other auxiliary tools can be used to stabilize the roll sleeve. After the roll core is lifted off, turn off the induction heating device and the lifting mechanism. After the roll sleeve cools down, use the crane to lift the roll sleeve under the control of the operator.

[0015] The principle of the utility model is as follows: the utility model supports the roller sleeve or the rolling roller through the supporting mechanism to make it stand upright, and then continuously heats the roller sleeve through the heating coil that moves up and down, so that the roller sleeve expands by heat and the inner diameter becomes larger, and then the roller core is placed into the roller sleeve or lifted out of the roller sleeve by the crane, thereby realizing safe and fast thermal fitting and thermal disassembly of the roller sleeve and the rolling roller.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model can perform heat-fitting and heat-disassembly on the roller sleeve and the roller core, is easy to operate, highly safe, and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the side cross-sectional structure of the utility model;

[0018] The components described in the accompanying drawings are marked as follows: frame 1, control box 2, induction heating device 3, lifting mechanism 4, supporting mechanism 5, heating coil 31, roller sleeve seat 51, roller core through hole 52, eaves 53, protective shell 6, temperature sensor 7. DETAILED DESCRIPTION

[0019] Example 1, below combined Figure 1 To further illustrate the present invention, the roller heat sleeve disassembly and assembly equipment includes a frame 1, a control box 2, an induction heating device 3, a lifting mechanism 4 and a supporting mechanism 5. The lifting mechanism is a pneumatic lifting mechanism, which is fixed to the frame. The induction heating device is a medium-frequency induction heating device. The induction heating device is mainly composed of a heating power supply and a heating coil. The heating coil is connected to the heating power supply through a wire. The heating coil 31 of the induction heating device is horizontally arranged, and the heating coil is fixedly connected to the lifting mechanism through a bracket. The heating coil is sleeved on the roller sleeve of the roller, and the lifting mechanism drives the heating coil to perform vertical reciprocating motion along the axis of the roller sleeve. The supporting mechanism is located directly below the heating coil and is fixed to the frame through a bracket. The supporting mechanism vertically supports one end of the roller. The induction heating device and the lifting mechanism are electrically connected to the control box. The control box integrates the controllers of the induction heating device and the lifting mechanism. The control box controls the lifting and lowering of the lifting mechanism and the heating temperature and heating time of the induction heating device. The control box is fixed to the frame.

[0020] Optionally, the supporting mechanism is mainly composed of a roller sleeve seat 51, a roller core through hole 52 is provided on the roller sleeve seat, and a eaves 53 is provided in the roller core through hole. The eaves is in contact with the lower end surface of the roller sleeve, and the lower end of the roller core of the rolling roller passes through the roller core through hole. If there is no boss on the roller core, the supporting mechanism also includes a roller core seat, which is located directly below the roller sleeve seat and is fixed to the frame through a bracket to support the roller core.

[0021] Optionally, in order to make the heating coil more stable when moving up and down, the lifting mechanism is distributed on both sides of the heating coil.

[0022] Optionally, in order to achieve a better heating effect, the distance between the heating coil and the outer wall of the roller sleeve is maintained at 2-4 cm.

[0023] Optionally, for the sake of safety and heat concentration as well as a better understanding of the roller sleeve status, a protective shell 6 is provided on the heating coil of the induction heating device to concentrate the heat to the center. The protective shell is annular and covers the heating coil. The heating coil is fixedly connected to the protective shell. An opening is provided on the inner side of the protective shell. The heating coil radiates heat energy to the roller sleeve through the opening. A temperature sensor 7 is provided on the protective shell. The temperature sensor is electrically connected to the control box. The probe of the stable sensor is fixed on the outer wall of the protective shell to detect the surface temperature of the roller sleeve. The main body of the temperature sensor is integrated in the control box to display the detected temperature.

[0024] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. Roller heat-shrink disassembly and assembly equipment, comprising a frame (1), a control box (2), an induction heating device (3), a lifting mechanism (4) and a supporting mechanism (5), characterized in that: The lifting mechanism is fixed on the frame, the heating coil (31) of the induction heating device is arranged horizontally, the heating coil is fixedly connected to the lifting mechanism through a bracket, the heating coil is sleeved on the roller sleeve, the lifting mechanism drives the heating coil to perform vertical reciprocating motion along the roller sleeve axis, the supporting mechanism is located directly below the heating coil and is fixed to the frame through the bracket, the supporting mechanism vertically supports one end of the roller, the induction heating device and the lifting mechanism are electrically connected to the control box, and the control box is fixed to the frame.

2. The roll shrink-fitting and disassembly equipment according to claim 1, characterized in that: The supporting mechanism mainly consists of a roller sleeve seat (51), a roller core through hole (52) is provided on the roller sleeve seat, a ledge (53) is provided in the roller core through hole, the ledge contacts the lower end surface of the roller sleeve, and the lower end of the roller core of the roller passes through the roller core through hole.

3. The roller shrink-fitting and disassembly equipment according to claim 1, characterized in that: The lifting mechanisms are distributed on both sides of the heating coil.

4. The roll shrink-fitting and disassembly equipment according to claim 1, characterized in that: The distance between the heating coil and the outer wall of the roller sleeve is 2-4 cm.

5. The roll shrink-fitting and disassembly equipment according to claim 1, characterized in that: The lifting mechanism is a pneumatic lifting mechanism.

6. The roll shrink-fitting and disassembly equipment according to claim 1, characterized in that: A protective shell (6) for concentrating heat toward the center is provided on the heating coil of the induction heating device, and a temperature sensor (7) is provided on the protective shell. The temperature sensor is electrically connected to the control box.

Images