CN112427921B - Device and method for dismantling floating shaft of hot rolling roughing mill - Google Patents
Device and method for dismantling floating shaft of hot rolling roughing mill Download PDFInfo
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- CN112427921B CN112427921B CN202011327492.7A CN202011327492A CN112427921B CN 112427921 B CN112427921 B CN 112427921B CN 202011327492 A CN202011327492 A CN 202011327492A CN 112427921 B CN112427921 B CN 112427921B
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- floating shaft
- flat plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
Abstract
The invention provides a device and a method for dismantling a floating shaft of a hot rolling roughing mill, wherein the device structurally comprises: the two supporting seats, the two dial indicators and the jacking device are arranged below the floating shaft to form stable support; the dial indicator is vertically erected above the floating shaft, and two ends of the jacking device respectively jack the bottom of the bearing seat of the floating shaft and the end face of the output coupling of the floating shaft; in use, determining a fit clearance between a spigot of a floating shaft half coupling and a spigot of a lower motor half coupling; integrally jacking the floating shaft, wherein the jacking height does not exceed the fit clearance between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling; and the whole floating shaft is translated to the load side until the spigot of the floating shaft half coupling is completely separated from the spigot of the lower motor half coupling and the radial key is completely withdrawn from the key slot. The invention can safely and efficiently finish the dismounting of the floating shaft, has higher stability, can effectively reduce the construction cost and avoid the damage of construction to the floating shaft.
Description
Technical Field
The invention relates to a hot rolling roughing mill, in particular to a device and a method for dismantling a floating shaft of the hot rolling roughing mill.
Background
The main motor of the hot rolling roughing mill comprises an upper motor and a lower motor, an output shaft of the lower motor is sequentially connected with a floating shaft and a universal shaft and outputs power to a lower roller, and the floating shaft is arranged in a pit below the upper motor. In the motor maintenance industry, when a motor under a hot rolling roughing mill is dismounted or loose cores, a floating shaft must be firstly dismounted. Due to the special spatial position of the floating shaft, the upper motor must be removed firstly when the floating shaft is removed by using a lifting method, but the cost for removing the upper motor is high, and the lifting method has the defect of low displacement precision. Due to the narrow space of a pit where the floating shaft is located and the heavy weight of the floating shaft, the conventional special lifting device cannot enter the pit.
The existing method for dismantling the floating shaft is to place a mechanical jack with large lifting capacity below the input end of the floating shaft as a fulcrum, take a bearing seat of the floating shaft as another fulcrum, and use a chain block or the jack to integrally translate the floating shaft until the spigot of the floating shaft half coupling is completely separated from the spigot of the lower motor half coupling and the radial key completely exits from the key slot after the jack is lifted to a certain height. The disadvantage of this dismantling method is low stability and poor safety; sliding friction is generated between the floating shaft and the jack and between the floating shaft and the bearing block of the floating shaft, so that the bearing block of the floating shaft has the risk of friction damage, and the floating shaft can be translated only by providing great horizontal thrust or pulling force, so that the efficiency is extremely low; the lifting height of the floating shaft can not be effectively controlled, the friction force between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling is increased with a high probability, and the difficulty in dismounting the floating shaft is increased.
Disclosure of Invention
In order to overcome the defects of the hot rolling roughing mill floating shaft dismantling method, the invention aims to provide the device and the method for dismantling the hot rolling roughing mill floating shaft, which can safely and efficiently complete the dismantling of the floating shaft, have higher stability and can effectively reduce the construction cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the device and the method for dismantling the floating shaft of the hot rolling roughing mill are provided, and the related device structure comprises: the device comprises two supporting seats, two dial indicators and a jacking device, wherein the supporting seats are respectively arranged below the floating shaft at set distances to form stable supports for ensuring that the bearing bush of the floating shaft is not damaged by friction in the translation process of the floating shaft; the dial indicator is vertically arranged at different positions above the floating shaft, the lifting height of the floating shaft can be accurately controlled through the dial indicator, and the frictional resistance between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling is effectively eliminated; and two ends of the jacking device are respectively jacked at the bottom of the bearing seat of the floating shaft and the end surface of the output coupling of the floating shaft.
The supporting seat comprises a lower supporting platform, a middle supporting platform, an upper supporting platform, two weight shifting tanks and a lifting device; the lifting device is vertically arranged between the lower supporting platform and the middle supporting platform; the two weight shifting tanks are arranged above the middle support platform and are arranged in parallel to the axial direction of the floating shaft; the split type supporting seat is convenient and fast to assemble and can meet the requirement of a narrow space of a pit where the floating shaft is located; meanwhile, the upper flat plate of the middle supporting platform provides a rolling plane for the weight shifting tank, and the rolling wheels at the bottom of the weight shifting tank are matched, so that the translation resistance of the floating shaft is greatly reduced, and the floating shaft can be translated conveniently and stably.
The upper support table comprises an upper support table upper flat plate and an upper support table lower flat plate, and the upper support table upper flat plate and the upper support table lower flat plate are connected through an upper support table strut; two ends of the upper surface of the upper support platform upper flat plate are provided with wedge-shaped platforms, and form wedge-shaped grooves for placing floating shafts.
The middle support platform comprises a middle support platform upper flat plate and a middle support platform lower flat plate, and the middle support platform upper flat plate and the middle support platform lower flat plate are connected through a middle support platform strut; the upper surface of the flat plate on the middle support platform is a plane, and stopping platforms are arranged in front of and behind the moving direction of the weight shifting tank on the plane.
The lower supporting platform comprises a lower supporting platform upper flat plate and a lower supporting platform lower flat plate, and the lower supporting platform upper flat plate and the lower supporting platform lower flat plate are connected through a lower supporting platform pillar.
The weight shifting tank is placed between two stopping tables on an upper flat plate of the middle supporting table, and the moving direction of the tank is perpendicular to the stopping tables.
The lifting device structurally comprises four thick bolts, and screw holes are formed in four corners of the lower flat plate of the middle supporting platform correspondingly; four thick bolts are respectively screwed downwards from the four corners of the lower flat plate of the middle support platform, the lower flat plate of the middle support platform extends out through the threaded holes, the end faces of the thick bolts are propped above the lower support platform, and the four bolts are simultaneously screwed down to realize the lifting of the floating shaft.
The lifting device comprises four mechanical jacks, the four mechanical jacks are respectively and vertically placed at four corners of a lower support platform lower flat plate, four through holes are symmetrically arranged on the lower support platform upper flat plate, the hole diameter of the through hole in the lower support platform upper flat plate is larger than the diameter of a mechanical jack rod, ejector rods of the four mechanical jacks stretch out of the lower support platform upper flat plate and are jacked below a middle support platform, the four mechanical jacks are simultaneously lifted, and the floating shaft is lifted.
A method for dismantling a floating shaft of a hot rolling roughing mill specifically comprises the following steps:
(1) Dismantling a universal coupling of a lower motor, a bolt of the lower motor coupling and the upper half part of a bearing seat of the floating shaft, and installing a floating shaft dismantling device;
(2) Determining a fit clearance between a spigot of the floating shaft half coupling and a spigot of the lower motor half coupling; integrally jacking the floating shaft, wherein the jacking height does not exceed the fit clearance between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling;
(3) And (4) the whole floating shaft is translated to the load side until the spigot of the floating shaft half-coupling is completely separated from the spigot of the lower motor half-coupling and the radial key is completely withdrawn from the key groove.
And determining the fit clearance between the floating shaft half coupling spigot and the lower motor half coupling spigot, wherein the fit clearance can be the drawing of the query equipment.
Under the condition of no equipment drawing, the method for determining the fit clearance between the floating shaft coupling half seam allowance and the lower motor coupling half seam allowance comprises the following steps:
step one, erecting a dial indicator seat on the vertical direction of a lower motor half-coupling, vertically pointing a dial indicator head to a floating shaft half-coupling, and zeroing the dial indicator;
step two, erecting another dial indicator seat on a bearing seat on the load side of the lower motor in the vertical direction, vertically pointing the head of the dial indicator to the shaft of the lower motor, and zeroing the dial indicator;
and step three, slowly jacking the floating shaft, observing the reading of a dial indicator erected on a bearing block on the load side of the lower motor, stopping jacking the floating shaft when the reading changes, and recording the reading of the dial indicator erected on the lower motor half coupling.
The beneficial effects of the invention are: the equipment has simple structure and convenient operation; the floating shaft can be safely and efficiently detached, and the stability is high; effectively reducing the construction cost and avoiding the damage of construction to the floating shaft.
Drawings
FIG. 1 is a schematic view of a floating shaft removing device of a hot rolling roughing mill according to the present invention.
Fig. 2 is a schematic structural view of the support seat of the present invention.
Fig. 3 is a front view of the support base of the present invention.
Fig. 4 is a side view of the support seat of the present invention.
FIG. 5 is a schematic view of a lower support table according to the present invention.
Fig. 6 is a schematic structural view of the support seat according to the second embodiment.
Fig. 7 is a schematic structural diagram of the supporting table according to the second embodiment.
In the figure: 1. a first support base; 11. a lower support table; 111. an upper flat plate of the lower support platform; 112. a lower flat plate of the lower support platform; 113. a lower support platform upright post; 114. an aperture; 12. a lifting device; 121. a bolt is thickened; 122. a mechanical jack; 13. a middle support platform; 131. a stop table; 132. an upper flat plate of the middle support platform; 133. a middle support platform lower flat plate; 134. a middle support platform upright post; 135. a threaded hole; 14. a weight shifting tank; 15. an upper support table; 151. a wedge-shaped table; 2. a second support seat; 3. a first percentile table; 4. a second dial indicator; 5. and (4) a jacking device.
Detailed Description
The following first describes two embodiments of the floating shaft removing device for hot rolling roughing mill.
Example one
As shown in fig. 1 to 5, a floating shaft removing device for a hot rolling roughing mill includes: a hot rolling roughing mill floating shaft dismounting device structurally comprises: first supporting seat 1, the second supporting seat 2, first percentage table 3, device 5 is stretched in second percentage table 4 and top, first supporting seat 1, second supporting seat 2 sets up respectively in the floating shaft below with the distance of settlement, provide stable support for the floating shaft, first percentage table 3, the perpendicular direction of different positions on the floating shaft is erect to second percentage table 4, with the accurate survey floating shaft jacking height, device 5 horizontal setting is stretched in the top, and the both ends of device 5 are stretched in the top and are pushed up the terminal surface at the bottom of floating shaft bearing frame and the output coupling of floating shaft respectively.
As shown in fig. 2 to 4, the support base includes a lower support base 11, a middle support base 13, an upper support base 15, two weight displacement tanks 14 and a lifting device 12, the middle support base 13 is above the lower support base 11, the upper surface of the middle support base 13 is a plane, stopping tables 131 are arranged on the plane in front of and behind the moving direction of the weight displacement tanks, the lifting device 12 is vertically arranged between the lower support base 11 and the middle support base 13, the two weight displacement tanks 14 are arranged on the upper surface of the middle support base 13 and are arranged parallel to the axial direction of the floating shaft, the upper support base 15 is arranged above the weight displacement tanks 14, wedge-shaped tables 151 are arranged on two sides of the floating shaft on the upper surface of the upper support base to prevent the floating shaft from swinging, and when the jacking device 5 starts to operate, the floating shaft moves horizontally along the axial direction.
As shown in fig. 5, the lifting device includes four mechanical jacks 122, the lower support platform 11 includes an upper lower support platform plate 111, a lower support platform plate 112, and a lower support platform column 113 connecting the upper lower support platform plate 111 and the lower support platform plate 112, the four mechanical jacks 122 are respectively vertically placed at four corners above the lower support platform plate 112, four holes 114 whose diameters are larger than those of the ejector rods of the mechanical jacks 122 are respectively vertically arranged at positions on the upper lower support platform plate 111 corresponding to the four mechanical jacks 122, the upper surfaces of the four mechanical jacks 122 extending out of the upper lower support platform plate 112 are jacked below the middle support platform 13, and when the ejector rods of the four mechanical jacks 122 extend out simultaneously, the middle support platform 13 is lifted upwards.
Example two
As shown in fig. 6 and 7, the present embodiment is different from the first embodiment in that the lifting device includes four thick bolts 121, the middle support platform 13 includes a middle support platform upper plate 132, a middle support platform lower plate 133, and a middle support platform upright 134 connecting the middle support platform upper plate 132 and the middle support platform lower plate 133, threaded holes 135 corresponding to the four thick bolts 121 are vertically provided at four corners of the middle support platform lower plate 133, the four thick bolts 121 are screwed downwards into the four threaded holes 135 and extend out of the lower plane of the middle support platform 13 to be supported above the lower support platform 11, and when the four thick bolts 121 are simultaneously screwed downwards, the middle support platform 13 is lifted upwards.
The method for dismantling the floating shaft of the hot rolling roughing mill comprises the following steps: dismantling a universal coupling of a lower motor, a bolt of the lower motor coupling and the upper half part of a bearing seat of the floating shaft, and installing a floating shaft dismantling device; determining a fit clearance between the spigot of the floating shaft coupling half and the spigot of the lower motor coupling half; integrally jacking the floating shaft, wherein the jacking height does not exceed the fit clearance between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling; and the whole floating shaft is translated to the load side until the spigot of the floating shaft half coupling is completely separated from the spigot of the lower motor half coupling and the radial key is completely withdrawn from the key slot.
The method for determining the fit clearance between the floating shaft coupling half spigot and the lower motor coupling half spigot can be realized by looking up a drawing or by the following methods: step one, erecting a dial indicator seat on the vertical direction of a lower motor half-coupling, vertically pointing a dial indicator head to a floating shaft half-coupling, and zeroing the dial indicator; step two, erecting another dial indicator seat on a bearing seat on the load side of the lower motor in the vertical direction, enabling a dial indicator head to vertically point to the lower motor shaft, and zeroing the dial indicator; and step three, slowly jacking the floating shaft, observing the reading of a dial indicator erected on a bearing block on the load side of the lower motor, stopping jacking the floating shaft when the reading changes, and recording the reading of the dial indicator erected on the lower motor half coupling.
Claims (3)
1. A device for dismantling a floating shaft of a hot rolling roughing mill structurally comprises: device is stretched on two supporting seats, two percentage tables and top, its characterized in that: the supporting seats are respectively arranged below the floating shaft to form stable support for ensuring that the bearing bush of the floating shaft is not damaged by friction in the translation process of the floating shaft; the dial indicator is vertically erected at different positions above the floating shaft, the lifting height of the floating shaft can be accurately controlled through the dial indicator, and the frictional resistance between the spigot of the floating shaft half-coupling and the spigot of the lower motor half-coupling is effectively eliminated; two ends of the jacking device are respectively jacked at the bottom of the bearing seat of the floating shaft and the end face of the output coupling of the floating shaft;
the supporting seat comprises a lower supporting platform, a middle supporting platform, an upper supporting platform, two weight shifting tanks and a lifting device; the lifting device is vertically arranged between the lower supporting platform and the middle supporting platform; the two weight shifting tanks are arranged above the middle support platform and are arranged in parallel to the axial direction of the floating shaft;
the upper supporting table comprises an upper supporting table upper flat plate and an upper supporting table lower flat plate, and the upper supporting table upper flat plate and the upper supporting table lower flat plate are connected through an upper supporting table strut; wedge-shaped platforms are arranged at two ends of the upper surface of the upper flat plate of the upper supporting platform, and form wedge-shaped grooves for placing the floating shaft;
the middle support platform comprises a middle support platform upper flat plate and a middle support platform lower flat plate, and the middle support platform upper flat plate and the middle support platform lower flat plate are connected through a middle support platform strut; the upper surface of the flat plate on the middle support platform is a plane, and stopping platforms are arranged on the plane in front of and behind the moving direction of the weight shifting tank;
the lower support table comprises a lower support table upper flat plate and a lower support table lower flat plate, and the lower support table upper flat plate and the lower support table lower flat plate are connected through a lower support table strut;
the lifting device is characterized in that the selected structure comprises four mechanical jacks, the four mechanical jacks are respectively vertically placed at four corners of a lower flat plate of a lower supporting table, through holes are correspondingly formed in an upper flat plate of the lower supporting table, the hole diameter of the through hole in the upper flat plate of the lower supporting table is larger than the diameter of a jack rod of each mechanical jack, ejector rods of the four mechanical jacks extend out of the upper flat plate of the lower supporting table and are abutted to the lower side of a middle supporting table, and the four mechanical jacks are simultaneously lifted to realize lifting of a floating shaft;
the weight shifting tank is placed between two stopping tables on the upper flat plate of the middle supporting table, and the moving direction of the tank is perpendicular to the stopping tables.
2. The apparatus for hot roughing mill floating shaft removal of claim 1 further characterized by: the lifting device is provided with four thick bolts in a selected structure, and screw holes are formed in four corners of a lower flat plate of the middle supporting platform; four thick bolts are respectively screwed downwards from the four corners of the lower flat plate of the middle support platform, the lower flat plate of the middle support platform extends out through the threaded holes, the end faces of the thick bolts are propped above the lower support platform, and the four bolts are simultaneously screwed down to realize the lifting of the floating shaft.
3. A method for dismantling a floating shaft of a hot rolling roughing mill is characterized by comprising the following steps: the device for dismantling the floating shaft of the hot rolling roughing mill, which is adopted by any one of the claims 1 to 2, comprises the following steps:
(1) Dismantling a universal coupling of a lower motor, a bolt of the lower motor coupling and the upper half part of a bearing seat of the floating shaft, and installing a floating shaft dismantling device;
(2) Determining a fit clearance between the spigot of the floating shaft coupling half and the spigot of the lower motor coupling half; integrally jacking the floating shaft, wherein the jacking height does not exceed the fit clearance between the spigot of the floating shaft half coupling and the spigot of the lower motor half coupling;
(3) The whole floating shaft is translated to the load side until the spigot of the floating shaft half coupling is completely separated from the spigot of the lower motor half coupling and the radial key is completely withdrawn from the key slot;
the method for determining the fit clearance between the floating shaft coupling half spigot and the lower motor coupling half spigot comprises the following steps:
step one, erecting a dial indicator seat on a lower motor half coupling in the vertical direction, vertically pointing a dial indicator head to a floating shaft half coupling, and zeroing the dial indicator;
step two, erecting another dial indicator seat in the vertical direction of a bearing seat on the load side of the lower motor, vertically pointing the head of the dial indicator to the shaft of the lower motor, and zeroing the dial indicator;
and step three, slowly jacking the floating shaft, observing the reading of a dial indicator erected on a bearing block on the load side of the lower motor, stopping jacking the floating shaft when the reading changes, and recording the reading of the dial indicator erected on the lower motor half coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011327492.7A CN112427921B (en) | 2020-11-24 | 2020-11-24 | Device and method for dismantling floating shaft of hot rolling roughing mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011327492.7A CN112427921B (en) | 2020-11-24 | 2020-11-24 | Device and method for dismantling floating shaft of hot rolling roughing mill |
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| CN112427921A CN112427921A (en) | 2021-03-02 |
| CN112427921B true CN112427921B (en) | 2023-02-10 |
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| CN202011327492.7A Active CN112427921B (en) | 2020-11-24 | 2020-11-24 | Device and method for dismantling floating shaft of hot rolling roughing mill |
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| SU1660926A1 (en) * | 1989-07-27 | 1991-07-07 | Рубцовский проектно-конструкторский технологический институт "Автокузлитмаш" | Device for dismantling and assembling roller units |
| JP2744692B2 (en) * | 1990-11-06 | 1998-04-28 | 三菱重工業株式会社 | Roll changing equipment for rolling mill |
| US20020134127A1 (en) * | 2000-08-29 | 2002-09-26 | Ryo Takeda | Ring roll replacing method in bar steel rolling mill and device therefor |
| CN1358452A (en) * | 2000-12-13 | 2002-07-17 | 谭振平 | Inner seasoned bean products |
| CN2827651Y (en) * | 2005-08-11 | 2006-10-18 | 昆明钢铁股份有限公司 | Device for withdrawing bearing race of support roller of rolling mill |
| CN100577314C (en) * | 2006-07-06 | 2010-01-06 | 宁波宝新不锈钢有限公司 | Device for changing roller |
| CN101618504B (en) * | 2009-06-16 | 2010-09-15 | 扬州力创机床有限公司 | Supporting roll assembling and disassembling machine |
| CN202622319U (en) * | 2012-03-26 | 2012-12-26 | 舞阳钢铁有限责任公司 | Device for replacing rolling mill safety coupling |
| CN203862690U (en) * | 2014-06-05 | 2014-10-08 | 武汉钢铁(集团)公司 | Device for demounting roller and bearing blocks of hot rolling testing machine |
| CN111604858A (en) * | 2020-06-18 | 2020-09-01 | 五冶集团上海有限公司 | Device and method for disassembling shaft and shaft sleeve |
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2020
- 2020-11-24 CN CN202011327492.7A patent/CN112427921B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108114988A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | Roll mill more changing device |
| CN110553570A (en) * | 2019-08-26 | 2019-12-10 | 山鹰国际控股股份公司 | method for four-point radial correction of coupler centering through double-percentile meter |
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