CN112091597A - High-speed wire finishing mill roller box assembling method - Google Patents
High-speed wire finishing mill roller box assembling method Download PDFInfo
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- CN112091597A CN112091597A CN202010751799.3A CN202010751799A CN112091597A CN 112091597 A CN112091597 A CN 112091597A CN 202010751799 A CN202010751799 A CN 202010751799A CN 112091597 A CN112091597 A CN 112091597A
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- eccentric sleeve
- installing
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- bearing
- sleeve
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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
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
- B23P21/002—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control the units stationary whilst being composed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
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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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
Abstract
The invention relates to an assembly method of a high-speed wire finishing mill roller box, belonging to the technical field of installation of high-speed wire finishing mills in the metallurgical industry. The technical scheme is as follows: firstly, heating a working side eccentric sleeve (9) and a transmission side eccentric sleeve (9-2) and then preserving heat, simultaneously placing an oil film bearing into a dry refrigerator or liquid nitrogen for cooling, respectively pressing the cooled oil film bearing into the working side eccentric sleeve (9) and the transmission side eccentric sleeve (9-2), then installing the eccentric sleeves of the working side and the transmission side and installing an eccentric sleeve assembly, ensuring that the axial and radial gaps of a roll shaft and the axial gap of an adjusting screw rod (8) meet the specified range, then installing a panel on a box body, then installing a glasses plate, adjusting the height of a supporting plate through a supporting plate installing hole of the glasses plate, enabling the height of the supporting plate to meet the specified requirement, and finally installing a double-lip seal and an inner and outer slip ring. The invention has the beneficial effects that: the assembly precision of the roller box can be ensured, and the stability of the roller box in online use is improved.
Description
Technical Field
The invention relates to an assembly method of a high-speed wire finishing mill roller box, belonging to the technical field of installation of high-speed wire finishing mills in the metallurgical industry.
Background
The fit clearance of each part needs to be controlled well in the assembly process of the high-speed wire finishing mill, so that the online long-term stable operation and the rolling precision of finished products can be ensured, the fit requirement on the clearance is not strict in the prior assembly process, the accumulated error clearance in the assembly process is overlarge, the assembly quality of the finishing mill is unstable, the horizontal heights of two shafts are often inconsistent in the online operation, the axial and radial clearances of a rolling shaft are overlarge, the quality of rolled finished products is reduced, and the online service cycle of a finishing mill roller box is shortened due to the fact that the fit precision is not high and the vibration of the finishing mill is overhigh in the operation process, so that the cost consumption of spare parts is caused, and the yield of rolled steel is reduced.
Disclosure of Invention
The invention aims to provide a method for assembling a roller box of a high-speed wire finishing mill, which can ensure the assembling precision of the roller box, improve the stability of the online use of the roller box and solve the problems in the background technology.
The technical scheme of the invention is as follows:
the method for assembling the roller box of the high-speed wire finishing mill comprises the following steps of:
firstly, installing oil film bearings on the working side and the transmission side
Heating the working side eccentric sleeve and the transmission side eccentric sleeve, preserving heat, simultaneously putting the oil film bearing into a dry refrigerator or liquid nitrogen for cooling, and then respectively pressing the cooled oil film bearing into the working side eccentric sleeve and the transmission side eccentric sleeve;
installing eccentric sleeve on working side and transmission side
Connecting a working side eccentric sleeve and a middle sleeve together, hoisting one end of a transmission side of a roll shaft, mounting the working side of the roll shaft in a mounting hole of the working side eccentric sleeve, putting an elastic damping gasket into a damping gasket clamping groove of the transmission side eccentric sleeve, then putting the transmission side eccentric sleeve on the middle sleeve after penetrating through the transmission side of the roll shaft, fixing the transmission side eccentric sleeve and the middle sleeve through bolts and positioning pins, and then mounting a double-row ball bearing by a hot-fitting method and ensuring the axial and radial gaps of the roll shaft;
mounting eccentric sleeve assembly
Adjusting the position of a screw rod supporting seat to enable the screw rod supporting seat to be aligned with an adjusting screw rod, placing a sliding block and a copper nut into a shifting fork of a middle sleeve, screwing the adjusting screw rod into the copper nut, installing a screw rod bearing and fixing a bearing seat, testing whether the axial clearance of the adjusting screw rod is within a specified range, and if the axial clearance of the adjusting screw rod exceeds the specified range, adjusting by adding and subtracting an adjusting gasket between the bearing seat and a box body until the axial clearance of the adjusting screw rod meets the specified range;
mounting roller box
The panel is arranged on the box body, then the glasses plate is arranged, the height of the supporting plate is adjusted through the supporting plate mounting hole of the glasses plate, the height of the supporting plate meets the requirement which meets the regulation, and then the double-lip seal and the inner and outer slip rings are arranged.
Heating the working side eccentric sleeve and the transmission side eccentric sleeve by using a heating box at the temperature of 121 ℃ for 4 hours, and cooling the oil film bearing to-80 ℃ in a dry refrigerator or liquid nitrogen.
The step II of installing the eccentric sleeves on the working side and the transmission side specifically comprises the following steps:
a. putting the working side eccentric sleeve into an assembly platform, connecting the middle sleeve and the working side eccentric sleeve together, and coating a certain amount of lubricating oil on an inner hole of the oil film bearing;
b. slightly coating lubricating oil on the roll neck of the roll shaft, and carefully placing the roll shaft into the eccentric sleeve on the working side by using a lifting hook;
c. a positioning pin is arranged on the flange of the middle sleeve;
d. the eccentric sleeve on the transmission side penetrates through the roll shaft and is placed on the middle sleeve, and the eccentric sleeve on the transmission side is aligned to the flange of the middle sleeve by using a positioning pin on the flange of the middle sleeve;
e. coating a thin layer of dry oil on the inner elastic damping gasket, and filling the dry oil into a damping gasket clamping groove in the eccentric sleeve on the transmission side;
f. heating the double-row ball bearings to 121 ℃, installing the heated double-row ball bearings on shaft heads of the roll shafts, and enabling oil grooves of outer rings of the two bearings to be opposite;
g. installing an upper bearing inner ring gland on the roll shaft;
h. coating a thin layer of dry oil on the outer elastic damping gasket, and installing the outer elastic damping gasket into a bearing gland and fastening the bearing gland by using bolts;
i. installing a dial indicator of the magnetic seat, checking the axial clearance of the roll shaft, and ensuring that the axial clearance of the roll shaft is within the range of 0mm-0.013 mm;
j. installing a magnetic seat dial indicator, checking the radial clearance between the roll shaft and the oil film bearing, and ensuring that the radial clearance between the roll shaft and the oil film bearing is checked to be within the range of 0.19-0.34 mm;
the step III of installing the eccentric sleeve assembly specifically comprises the following steps:
a. placing the assembly of the roller box body and the panel on a platform, wherein the panel faces upwards, and a certain distance is kept below the transmission side of the box body;
b. adjusting the position of the screw rod supporting seat to enable the screw rod supporting seat to be aligned with the adjusting screw rod;
c. lubricating the adjusting screw rod by using dry oil, and then loading the adjusting screw rod into a screw rod supporting seat;
d. heating the bearing to 121 ℃, and installing the bearing on an adjusting screw rod;
e. the adjusting screw rod extends into the mounting hole in the side surface of the box body and is arranged in the screw rod supporting seat;
f. placing a probe of the magnetic seat dial indicator at the end of the adjusting screw rods, detecting axial movement, ensuring that the gap between the two adjusting screw rods is within the range of 0.20mm-0.30mm, and if the gap does not meet the requirement, adding or reducing a gasket below a screw rod bearing seat until the gap range of 0.20mm-0.30mm is met;
g. slightly coating a layer of lubricating oil on the sliding block, loading the lubricating oil into the copper nut, and installing the copper nut and the sliding block on the shifting fork of the eccentric sleeve;
h. slightly coating a layer of lubricating oil on the outer diameter of the eccentric sleeve which is pre-installed, and lifting the eccentric sleeve assembly provided with the roll shaft to be placed into the hole of the roll shaft box body;
i. inserting the adjusting screw rod into the copper nut, and guiding the adjusting screw rod into the shaft sleeve;
j. installing and fixing a bearing seat;
k. mounting a fixed plate and an adjusting gasket;
the same procedure is used to install another eccentric bushing assembly.
The step IV of installing the roller box specifically comprises the following steps:
a. lifting the panel, enabling the mounting hole of the working side eccentric sleeve of the panel to fall onto the outer ring of the working side eccentric sleeve, installing a positioning pin positioned with the box body on the panel, attaching a bolt fixed with the box body on the panel after the panel is attached to the box body, adding a check washer, and uniformly screwing the bolt;
b. the roller box is lifted to be horizontal and is placed on a wood block of the assembly platform;
c. the height of two shafts is measured by a depth gauge, and the detection method comprises the following steps: measuring the size from the surface of the sealing plate to the roll shaft, ensuring that the distance from the sealing plate to the roll shaft is 15.68mm, and if the size cannot meet the requirement of 15.68mm, replacing the sealing plate or grinding the surface of the sealing plate until the distance from the sealing plate to the roll shaft meets the requirement of 15.68 mm;
d. installing the inner sliding ring provided with the O-shaped sealing ring on a corresponding roll shaft;
e. an O-shaped sealing ring and a double-lip sealing ring are arranged on the sealing plate;
f. placing a sealing plate provided with an O-shaped sealing ring and a double-lip sealing ring on the working side eccentric sleeve, and fixing the sealing plate and the working side eccentric sleeve by using bolts;
g. coating a layer of sealant on a matching surface u of the sealing plate and the panel, and respectively installing the sealing plate on the working side eccentric sleeve and the transmission side eccentric sleeve by using bolts;
h. installing the O-shaped sealing ring on the outer sliding ring, and placing the outer sliding ring provided with the O-shaped sealing ring on the corresponding roller shaft;
i. coating a layer of sealant on the matching surface of the glasses plate and the panel, and mounting the glasses plate on the panel by using the positioning pin.
j. Installing a protective cap and fastening the protective cap by using a bolt;
k. a cooling water pipe is arranged on the panel;
m, setting the rolling centers of the two shafts to be 350 mm;
n, mounting a bearing seat and a gasket of the adjusting screw rod, and fixing the bearing seat and the gasket by using a bolt and a check washer;
o, mounting a straight gear transmission key on the adjusting screw rod;
p. heating the spur gear to 121 ℃;
pressing the straight gear into the matched adjusting screw rod;
determining the axial positions of the two roll shafts by adding and subtracting the fixing plate and the adjusting shim, ensuring that the axial position tolerance of the two roll shafts cannot exceed 0.05mm, and adjusting the distance between the two shoulders and the panel to be 9.40 +0.05mmAfter the fastening bolt of the fixing plate is screwed down, the locking gasket is bent to prevent the bolt from loosening;
and s, completing the assembly work.
The invention has the beneficial effects that: the invention can ensure the precision of each fit clearance in the process of installing the roller box, improve the stability of the online use of the roller box, and ensure the stable control of the clearance in the rolling process, thereby improving the product quality and reducing equipment accidents.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a front view of the panel of the present invention;
FIG. 4 is a schematic view of a panel eccentric bushing mounting hole of the present invention;
FIG. 5 is a view of the internal structure of the lead screw of the present invention;
FIG. 6 is a front view of the roll cassette of the present invention;
FIG. 7 is a top view of the roller box;
FIG. 8 is a perspective view of the roller box;
FIG. 9 is a schematic view of a working side eccentric sleeve structure;
FIG. 10 is a schematic view of a drive side eccentric bushing
FIG. 11 is a schematic view of the present invention intermediate sleeve;
FIG. 12 is a schematic view of a seal plate seal;
FIG. 13 is a schematic view of a screw bearing housing;
in the figure: the device comprises a panel 1, a working side eccentric sleeve mounting hole 1-1, a box body 1-2, a transmission side eccentric sleeve mounting hole 1-3, a cooling water pipe 2, a glasses plate 3, a glasses plate positioning pin 3-1, a protective cap 4, a protective cap fixing bolt 4-1, a sealing plate 5, a double-lip seal 5-1, an outer sliding ring 5-2, an inner sliding ring 5-3, a rolling roll shaft 6, a straight gear 7, an adjusting screw 8, a screw bearing seat 8-1, a screw bearing 8-2, a screw bearing seat 8-3, a sliding block 8-4, a working side eccentric sleeve 9, an intermediate sleeve 9-1, a transmission side eccentric sleeve 9-2, an oil film bearing 9-3, a pin hole 9-4, a copper nut 9-5, an eccentric sleeve shifting fork 9-6, a bearing gland 10, a bolt 10-1, a double-row ball bearing 10-2, The device comprises a bearing inner ring gland 10-3, an inner ring gland screw 10-4, a damping gasket 10-5, a fixing plate 11, an adjusting gasket 11-1, a locking gasket 11-2, a bolt hole 12 matched with a panel, an oil nozzle mounting hole 13, a lead screw mounting hole 14, a lead screw gland mounting hole 15, a gland bolt mounting hole 16 and a positioning column 17.
Detailed Description
The invention is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to figures 1-13 of the drawings, a method of assembling a roll cassette for a high speed wire finishing mill operates according to the following steps:
firstly, installing oil film bearings on the working side and the transmission side
Heating the working side eccentric sleeve 9 and the transmission side eccentric sleeve 9-2, preserving heat, simultaneously putting the oil film bearing into a dry refrigerator or liquid nitrogen for cooling, and then respectively pressing the cooled oil film bearing into the working side eccentric sleeve 9 and the transmission side eccentric sleeve 9-2;
installing eccentric sleeve on working side and transmission side
Connecting a working side eccentric sleeve 9 and an intermediate sleeve 9-1 together, hoisting one end of a transmission side of a roll shaft, installing the working side of the roll shaft into an installation hole of the working side eccentric sleeve 9, putting an elastic damping gasket into a damping gasket clamping groove of the transmission side eccentric sleeve 9-2, penetrating the transmission side eccentric sleeve 9-2 through the roll shaft transmission side, placing the transmission side eccentric sleeve on the intermediate sleeve 9-1, fixing the transmission side eccentric sleeve and the intermediate sleeve 9-1 through a bolt and a positioning pin, and then installing a double-row ball bearing by a hot-fitting method, and ensuring the axial and radial gaps of the roll shaft;
mounting eccentric sleeve assembly
Adjusting the position of a screw rod supporting seat to enable the screw rod supporting seat to be aligned with an adjusting screw rod 8, placing a sliding block and a copper nut into a shifting fork of a middle sleeve 9-1, screwing the adjusting screw rod 8 into the copper nut, installing a screw rod bearing and fixing a bearing seat, testing whether the axial clearance of the adjusting screw rod 8 is within a specified range, and if the axial clearance of the adjusting screw rod 8 exceeds the specified range, adjusting by adding and subtracting an adjusting gasket between the bearing seat and a box body until the axial clearance of the adjusting screw rod 8 meets the specified range;
mounting roller box
The panel is arranged on the box body, then the glasses plate is arranged, the height of the supporting plate is adjusted through the supporting plate mounting hole of the glasses plate, the height of the supporting plate meets the requirement which meets the regulation, and then the double-lip seal and the inner and outer slip rings are arranged.
In this embodiment, referring to fig. 1-13, when assembling the roller box, the maintenance room of the finishing mill group is kept as clean as possible, when assembling the bearing, the bearing is not damaged, the bearing is not exposed and stored in the air, and the bearing is wrapped with oilproof paper or plastic cloth until the bearing is opened, and the operation is specifically performed according to the following steps:
(1) mounting of oil film bearings
The oil film bearing has thin wall thickness, and if the oil film bearing is pressed into the inner hole of the eccentric sleeve, the oil film bearing can be wrinkled under the action of pressure and can be adhered between the outer surface of the bearing and the inner hole of the eccentric sleeve.
1) Installing working side oil film bearing
a. Heating the working side eccentric sleeve 9 to 121 ℃ by using a heating box, preserving heat for 4 hours, and when the eccentric sleeve reaches the heating temperature, putting the oil film bearing 9-3 into a dry ice box or liquid nitrogen to cool to-80 ℃;
b. horizontally placing the heated working side eccentric sleeve 9 on an assembly table, wherein the working side is upward;
c. clamping the two halves of the oil film bearing 9-3 together by using a firm hoop spring, confirming that the half edge with the oil groove and the oil hole is in the corresponding position with the oil hole of the working side eccentric sleeve 9, and aligning the split line of the oil film bearing 9-3 to the scribed line on the working side eccentric sleeve 9;
d. the oil film bearing 9-3 is lightly pressed into the working side eccentric sleeve 9 by a special oil film bearing mounting tool, and the hoop spring naturally falls off along with the bearing entering the working side eccentric sleeve 9;
e. checking the oil hole centering condition of the oil film bearing 9-3 and the working side eccentric sleeve 9, checking the inner hole of the oil film bearing 9-3, and confirming that no damage in any form exists.
2) Installing a transmission side oil film bearing
a. Heating the eccentric sleeve 9-2 at the transmission side to 121 ℃, and when the eccentric sleeve reaches the heating temperature, putting the oil film bearing 9-3 and the conical clamp into a dry ice box or liquid nitrogen to cool to-80 ℃;
b. supporting the heated eccentric sleeve 9-2 on an assembly table, placing the oil film bearing 9-3 into a conical fixture, and then placing the fixture into the eccentric sleeve;
c. confirming that the half edge of the oil film bearing 9-3 with the oil groove and the oil hole is in the corresponding position with the oil hole of the eccentric sleeve 9-2, and aligning the split line of the oil film bearing 9-3 with the scribed line of the eccentric sleeve 9-2;
d. slightly pushing the oil film bearing 9-3 into the eccentric sleeve 9-2 from the conical clamp by using a punch until the oil film bearing reaches a shoulder;
e. and checking the oil hole centering condition of the oil film bearing and the eccentric sleeve, checking the inner hole of the oil film bearing, and confirming that no damage in any form exists.
(2) Eccentric sleeve for installing working side and transmission side
a. Placing the finish-machined end face of the working side eccentric sleeve 9 into an assembly platform, connecting the middle sleeve 9-1 and the working side eccentric sleeve 9 together, and coating a certain amount of lubricating oil on an inner hole of the oil film bearing;
b. the roll shaft 6 was lightly lubricated at the neck and carefully placed into the work side eccentric sleeve 9 with a hook. Before installing the working side eccentric sleeve 9, please check the mark to ensure that the matched working side eccentric sleeve 9 and the middle sleeve 9-1 are assembled together;
c. a positioning pin 9-4 is arranged on the flange of the middle sleeve 9-1;
d. the driving side eccentric sleeve 9-2 penetrates through the roller shaft 6 and is placed on the middle sleeve 9-1, and the driving side eccentric sleeve 9-2 and the middle sleeve 9-1 are in flange pair by using a positioning pin on a flange of the middle sleeve 9-1;
e. coating a thin layer of dry oil on the inner elastic damping gasket 10-5, and loading the dry oil into a damping gasket clamping groove in the transmission side eccentric sleeve 9-2;
f. positioning the eccentric sleeve and the middle section flange by using a bolt and a check washer;
g. heating the double-row ball bearing 10-3 to 121 ℃ (for example, heating the bearing to 121 ℃ by oil for at least 1 hour, heating for at least 15 minutes by electric induction, heating for at least 0.5-1 hour in an electric furnace), loading the heated bearing 10-3 on a shaft head of a rolling shaft 6 by a special tool, and enabling oil grooves of outer rings of the two bearings to be opposite;
h. the roll shaft 6 is fitted with a bearing inner race gland 10-3 (after the bearing has cooled, the bolts 10-4 are tightened again to ensure that the bearing is held tightly against the shoulder and then tightened to a torque value of 55 Nm;
i. coating a thin layer of dry oil on an outer elastic damping gasket 10-5, installing the outer elastic damping gasket into a bearing gland 10, fastening the outer elastic damping gasket by using bolts 10-1, and uniformly screwing all the bolts to a torque value of 55 Nm;
j. installing a magnetic seat dial indicator, checking that the axial clearance of the roll shaft can be used within the range of 0mm-0.013mm, and if the clearance exceeds the range, replacing the bearing;
k. and (4) installing a magnetic seat dial indicator, checking that the radial clearance between the roll shaft and the oil film bearing is within the range of 0.19-0.34 mm, and replacing the bearing if the clearance exceeds the range.
(3) Installing eccentric bushing assembly
a. Placing the assembly of the roll box body 1-2 and the panel 1 on a platform, wherein the panel 1 faces upwards and a certain distance is kept below the transmission side of the box body;
b. if the roller box is disassembled, the middle supporting seat 8-3 and the gasket of the adjusting screw rod 8 are disassembled and then installed, the middle supporting seat and the gasket are temporarily fixed on the box body by using bolts, and the centering of the screw rod supporting seat 8-3 is adjusted by adding or subtracting the gasket;
c. lubricating the adjusting screw rod 8 by using dry oil, and then loading the adjusting screw rod into a supporting seat;
d. heating the bearing to 121 ℃ (heating the bearing to 121 ℃ by oil for at least 1 hour, heating the bearing by electric induction for at least 15 minutes, and heating the bearing in an electric furnace for at least 0.5-1 hour), and mounting the bearing on an adjusting screw rod 8;
e. the adjusting screw rod 8 is inserted into a mounting hole on the side surface of the box body 1-2 and is arranged in a supporting seat, the same group of gaskets which are disassembled in the decomposition process are adopted, the screw rod bearing seat 8-1 is put in place and is fastened by bolts, and at the moment, a check washer is not required to be arranged, and the check washer is arranged after the rolling center line is adjusted;
f. placing a probe of the magnetic seat dial indicator at the end of the adjusting screw rod, detecting axial movement, ensuring that the gap between the two adjusting screw rods 8 is within a design range, and if the gap does not meet the requirement, adding or subtracting a gasket under the bearing seat until the gap meets the requirement of 0.20mm-0.30 mm;
g. removing the adjusting screw rod 8, the bearing 8-2 and the gasket;
h. slightly coating a layer of lubricating oil on the sliding block 8-4, loading the lubricating oil into the copper nut 9-5, and loading the copper nut 9-5 and the sliding block 8-4 on a shifting fork of the eccentric sleeve;
i. slightly coating a layer of lubricating oil on the outer diameter of the eccentric sleeve which is pre-installed, and lifting the eccentric sleeve assembly provided with the roll shaft 6 and placing the eccentric sleeve assembly into the hole 1-3 of the roll shaft box body;
j. inserting the adjusting screw rod 8 into the copper nut 9-5, carefully guiding the adjusting screw rod into the shaft sleeve, and then confirming whether the adjusting screw rod 8 is correctly installed;
k. installing and fixing the bearing seat 8-1, wherein the gasket only uses a bolt instead of a check washer;
mounting a fixing plate 11 and an adjusting gasket 11-1, wherein bolts do not need to be screwed down, and a locking gasket 11-2 does not need to be bent;
m. another eccentric bushing assembly is installed in the same procedure.
(4) Mounting roll box
a. Carefully and slowly hoisting the panel to enable the mounting hole 1-1 of the working side eccentric sleeve of the panel to fall onto the outer ring of the working side eccentric sleeve 9, installing a positioning pin for positioning with the box body on the panel 1, attaching a bolt fixed with the box body on the panel and adding a check washer after the panel 1 is attached to the box body 1-2, and uniformly screwing the bolt;
b. if bearing clearance is not detected during assembly of the assembly, shaft detection should be completed at this time;
c. the roller box is lifted to be horizontal and is placed on a wood block of the assembly platform;
d. setting a rolling central line; at the moment, the inner sliding ring 5-3, the outer sliding ring 5-2 and the double-lip sealing ring 5-1 are not installed, the size from the roll shaft 6 to the sealing plate 5 is detected, if the size is not qualified, the sealing plate 5 is replaced or the surface of the sealing plate 5 is ground until the size requirement that the distance between the sealing plate 5 and the shaft shoulder is 15.68mm is met;
e. and (3) installing the inner slip ring 5-3 provided with the O-shaped sealing ring on the corresponding roller shaft. It should be determined that the O-ring seal on the inner slip ring 5-3 is not damaged;
f. a 0-shaped sealing ring and a double-lip sealing ring 5-1 are arranged on the sealing plate 5;
g. placing a sealing plate 5 provided with an O-shaped sealing ring and a double-lip sealing ring 5-1 on a working side eccentric sleeve 9, and fixing the sealing plate 5 and the working side eccentric sleeve 9 by using bolts;
h. lightly coating a layer of sealant on the matching surfaces of the left and right sealing plates 5 and the panel 1, and installing the left and right sealing plates on the eccentric sleeves by using bolts, wherein the O-shaped sealing rings on the sealing plates are ensured not to be damaged;
i. after the O-shaped sealing ring is slightly lubricated, the O-shaped sealing ring is arranged on the outer sliding ring 5-2, the outer sliding ring 5-2 provided with the O-shaped sealing ring is arranged on a corresponding roller shaft, and at the moment, the O-shaped sealing ring on the outer sliding ring is determined not to be damaged;
j. lightly coating a layer of sealant on the matching surface of the glasses plate 3 and the panel, and installing the glasses plate 3 on the panel by using a positioning pin 3-1;
k. installing a protective cap 4 and fastening by using a bolt;
a cooling water pipe 2 is arranged on the panel;
setting a rolling center according to design requirements;
n, mounting a bearing seat 8-1 and a gasket of the adjusting screw rod 8, and fixing by using a bolt and a check washer;
o, mounting a transmission key of a straight gear 7 on an adjusting screw rod 8;
p. heating the spur gear 7 to 121 ℃;
q, pressing the straight gear 7 into the matched adjusting screw rod 8;
and r, determining the axial positions of the two roller shafts by adding and subtracting the fixing plate 11 and the adjusting shim 11-1, ensuring that the axial position tolerance of the two roller shafts cannot exceed 0.05mm, and adjusting the distance between the two shoulders and the panel to be 9.40+0.05 mm. Screwing the bolt, bending the locking gasket 11-2 and clamping the bolt;
and s, completing the assembly work.
Claims (5)
1. The method for assembling the roller box of the high-speed wire finishing mill is characterized by comprising the following steps of: the method comprises the following steps:
mounting working side and transmission side oil film bearing
Heating the working side eccentric sleeve (9) and the transmission side eccentric sleeve (9-2), preserving heat, simultaneously putting the oil film bearing into a dry refrigerator or liquid nitrogen for cooling, and then respectively pressing the cooled oil film bearing into the working side eccentric sleeve (9) and the transmission side eccentric sleeve (9-2);
eccentric sleeve for installing working side and transmission side
Connecting a working side eccentric sleeve (9) and an intermediate sleeve (9-1) together, hoisting one end of a transmission side of a roll shaft, installing the working side of the roll shaft into an installation hole of the working side eccentric sleeve (9), placing an elastic damping gasket into a damping gasket clamping groove of the transmission side eccentric sleeve (9-2), then putting the transmission side eccentric sleeve (9-2) on the intermediate sleeve (9-1) through the transmission side of the roll shaft, fixing the transmission side eccentric sleeve and the intermediate sleeve (9-1) through a bolt and a positioning pin, and then installing a double-row ball bearing by a hot-fitting method, and ensuring the axial and radial gaps of the roll shaft;
installing eccentric bushing assembly
Adjusting the position of a screw rod supporting seat to enable the screw rod supporting seat to be aligned with an adjusting screw rod (8), placing a sliding block and a copper nut into a shifting fork of a middle sleeve (9-1), screwing the adjusting screw rod (8) into the copper nut, installing a screw rod bearing and fixing the bearing seat, testing whether the axial clearance of the adjusting screw rod (8) is within a specified range, and if the axial clearance of the adjusting screw rod (8) exceeds the specified range, adjusting by adding and subtracting an adjusting gasket between the bearing seat and a box body until the axial clearance of the adjusting screw rod (8) meets the specified range;
mounting roll box
The panel is arranged on the box body, then the glasses plate is arranged, the height of the supporting plate is adjusted through the supporting plate mounting hole of the glasses plate, the height of the supporting plate meets the requirement which meets the regulation, and then the double-lip seal and the inner and outer slip rings are arranged.
2. The method of assembling a roll cassette for a high-speed wire finishing mill according to claim 1, wherein: heating the working side eccentric sleeve (9) and the transmission side eccentric sleeve (9-2) by using a heating box at the temperature of 121 ℃ for 4 hours, and cooling the oil film bearing to-80 ℃ in a dry refrigerator or liquid nitrogen.
3. The method of assembling a roll cassette for a high-speed wire finishing mill according to claim 1, wherein: the step II of installing the eccentric sleeves on the working side and the transmission side specifically comprises the following steps:
a. putting the working side eccentric sleeve (9) into an assembly platform, connecting the middle sleeve (9-1) and the working side eccentric sleeve (9) together, and coating a certain amount of lubricating oil on an inner hole of the oil film bearing;
b. slightly coating lubricating oil on the roll neck of the roll shaft (6), and carefully placing the roll shaft (6) into the working side eccentric sleeve (9) by using a lifting hook;
c. a positioning pin (9-4) is arranged on the flange of the middle sleeve (9-1);
d. the eccentric sleeve (9-2) at the transmission side penetrates through the roller shaft (6) and is placed on the middle sleeve (9-1), and the eccentric sleeve (9-2) at the transmission side and the middle sleeve (9-1) are arranged oppositely by a positioning pin on the flange of the middle sleeve (9-1);
e. coating a thin layer of dry oil on the inner elastic damping gasket (10-5), and loading the dry oil into a damping gasket clamping groove in the eccentric sleeve (9-2) at the transmission side;
f. heating the double-row ball bearing (10-3) to 121 ℃, and installing the heated double-row ball bearing (10-3) on a shaft head of a roll shaft (6) and enabling oil grooves of outer rings of the two bearings to be opposite;
g. an upper bearing inner ring gland (10-3) is arranged on the roll shaft (6);
h. coating a thin layer of dry oil on the outer elastic damping gasket (10-5), and installing the dry oil into a bearing gland (10) and fastening the dry oil by using a bolt (10-1);
i. installing a magnetic seat dial indicator, checking the axial clearance of the roll shaft (6) and ensuring that the axial clearance of the roll shaft (6) is within the range of 0MM-0.013 MM;
j. and (3) installing a magnetic seat dial indicator, checking the radial clearance between the roll shaft (6) and the oil film bearing, and ensuring that the radial clearance between the roll shaft (6) and the oil film bearing is checked within the range of 0.19-0.34 mm.
4. The method of assembling a roll cassette for a high-speed wire finishing mill according to claim 1, wherein: the step III of installing the eccentric sleeve assembly specifically comprises the following steps:
a. the assembly of the roll box body (1-2) and the panel (1) is placed on a platform, the panel (1) faces upwards, and a certain distance is kept below the transmission side of the box body;
b. adjusting the position of the screw rod supporting seat to enable the screw rod supporting seat to be aligned with the adjusting screw rod (8);
c. lubricating the adjusting screw rod (8) by using dry oil, and then loading the adjusting screw rod into a screw rod supporting seat;
d. heating the bearing to 121 ℃, and installing the bearing on an adjusting screw rod (8);
e. the adjusting screw rod (8) extends into the mounting hole in the side surface of the box body (1-2) and is arranged in the screw rod supporting seat;
f. placing a probe of the magnetic seat dial indicator at the end of the adjusting screw rods (8), detecting axial movement, ensuring that the gap between the two adjusting screw rods (8) is within the range of 0.20mm-0.30mm, and if the gap does not meet the requirement, adding or reducing a gasket below the screw rod bearing seat until the gap meets the range of 0.20mm-0.30 mm;
g. slightly coating a layer of lubricating oil on the sliding block (8-4), loading the lubricating oil into the copper nut (9-5), and installing the copper nut (9-5) and the sliding block (8-4) on a shifting fork (9-6) of the eccentric sleeve;
h. slightly coating a layer of lubricating oil on the outer diameter of a pre-installed eccentric sleeve, and lifting the eccentric sleeve assembly provided with the roll shaft (6) and placing the eccentric sleeve assembly into a hole (1-3) of a roll shaft box body;
i. inserting the adjusting screw rod (8) into the copper nut (9-5), and guiding the adjusting screw rod (8) into the shaft sleeve;
j. installing and fixing a bearing seat (8-1);
k. mounting a fixed plate (11) and an adjusting gasket (11-1);
the same procedure is used to install another eccentric bushing assembly.
5. The method of assembling a roll cassette for a high-speed wire finishing mill according to claim 1, wherein: the step IV of installing the roller box specifically comprises the following steps:
a. lifting the panel, enabling the working side eccentric sleeve mounting hole (1-1) of the panel to fall onto an outer ring of the working side eccentric sleeve (9), installing a positioning pin positioned with the box body on the panel (1), attaching a bolt fixed with the box body on the panel after the panel (1) is attached to the box body (1-2), adding a check washer, and uniformly screwing the bolt;
b. the roller box is lifted to be horizontal and is placed on a wood block of the assembly platform;
c. the height of two shafts is measured by a depth gauge, and the detection method comprises the following steps: measuring the size of the surface of the sealing plate (5) to the roll shaft (6), ensuring that the distance from the sealing plate (5) to the roll shaft (6) is 15.68mm, and if the size cannot meet the requirement of 15.68mm, replacing the sealing plate (5) or grinding the surface of the sealing plate (5) until the distance from the sealing plate (5) to the roll shaft (6) meets the size requirement of 15.68 mm;
d. the inner slip ring (5-3) provided with the O-shaped sealing ring is arranged on the corresponding roll shaft;
e. an O-shaped sealing ring and a double-lip sealing ring (5-1) are arranged on the sealing plate (5);
f. placing a sealing plate (5) provided with an O-shaped sealing ring and a double-lip sealing ring (5-1) on a working side eccentric sleeve (9), and fixing the sealing plate (5) and the working side eccentric sleeve (9) by using a bolt;
g. coating a layer of sealant on a matching surface u of the sealing plate (5) and the panel (1), and respectively installing the sealing plate (5) on the working side eccentric sleeve and the transmission side eccentric sleeve by using bolts;
h. installing the O-shaped sealing ring on the outer sliding ring (5-2), and placing the outer sliding ring (5-2) provided with the O-shaped sealing ring on the corresponding roller shaft;
i. coating a layer of sealant on the matching surface of the glasses plate (3) and the panel, and installing the glasses plate (3) on the panel by using the positioning pin (3-1);
j. installing a protective cap (4) and fastening the protective cap (4-1) by using a bolt;
k. a cooling water pipe (2) is arranged on the panel;
m, setting the rolling centers of the two shafts to be 350 mm;
n, mounting a bearing seat (8-1) and a gasket of the adjusting screw rod (8), and fixing by using a bolt and a check washer;
o, mounting a transmission key of a straight gear (7) on the adjusting screw rod (8);
p. heating the spur gear (7) to 121 ℃;
q, pressing the straight gear (7) into the adjusting screw rod (8) matched with the straight gear;
determining the axial positions of the two roller shafts by adding and subtracting the fixing plate (11) and the adjusting shim (11-1) so that the axial position tolerance of the two roller shafts cannot exceed 0.05mm, and adjusting the axial positions of the two roller shafts to the panelDistance 9.40 +0.05mmAfter fastening bolts (11-3) of the fixing plate (11) are screwed, bending the locking gasket (11-2) to prevent the bolts from loosening;
and s, completing the assembly work.
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| CN202010751799.3A CN112091597B (en) | 2020-07-30 | 2020-07-30 | High-speed wire finishing mill roller box assembling method |
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| CN112935759A (en) * | 2021-02-02 | 2021-06-11 | 河钢股份有限公司承德分公司 | Method for assembling gear of finishing mill cone box |
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| CN112091597B (en) | 2022-01-25 |
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