CN112222754B - Method for repairing hinged shaft hole of cutting rocker arm of coal mining machine - Google Patents
Method for repairing hinged shaft hole of cutting rocker arm of coal mining machine Download PDFInfo
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- CN112222754B CN112222754B CN202011111448.2A CN202011111448A CN112222754B CN 112222754 B CN112222754 B CN 112222754B CN 202011111448 A CN202011111448 A CN 202011111448A CN 112222754 B CN112222754 B CN 112222754B
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Abstract
The invention discloses a method for repairing a hinged shaft hole of a cutting rocker arm of a coal mining machine, wherein the cutting rocker arm is provided with a plurality of lug seats which are arranged at intervals, the lug seats have the same structure, and the hinged shaft hole penetrates through the lug seats, and the method comprises the following steps: s01, connecting the two first workpieces and the second workpiece with the ear seat respectively; s02: the steel pipe penetrates through the first workpiece, the lug seat and the second workpiece; s03: welding a second workpiece on the side surface of the lug seat, and then drawing out the steel pipe; s04: expanding a first center hole of the first workpiece and a second center hole of the second workpiece to be the same as the original hinged shaft hole in diameter; s05, filling the damaged hinged shaft holes to be the same as the diameters of the first center hole and the second center hole in the step SO4 by manual surfacing; s06: and after the filling, the first workpiece and the second workpiece are unloaded to finish the repair. The invention has the beneficial effects that: the method is simple, the operation is convenient, the tool can be repeatedly used, the repair time is greatly reduced, and meanwhile, a valuable reference is provided for treating similar faults in the future.
Description
Technical Field
The invention relates to a hole repairing method, in particular to a hole repairing method for a coal mining machine.
Background
During the overhaul of ore 17102(3) working face equipment, an electric mining machine repair center finds that 3 connecting pin shaft holes between a right traction transmission case and a right cutting rocker of an MG 750/1940-WD mining machine which is planned to be used have large abrasion, and the abrasion loss is about 5-10 mm through field measurement and identification, and the electric mining machine repair center cannot be used if the electric mining machine is not repaired.
The coal mining machine is core equipment in a frame of a fully-mechanized mining machine, for example, application number 201910917392.0 discloses a short-body thin coal seam coal mining machine and a cutting coal mining method, the coal mining machine comprises a machine body shell, a first cutting rocker arm and a second cutting rocker arm, the first cutting rocker arm comprises a first rocker arm shell, a first cutting drum and a first transmission mechanism, the second cutting rocker arm comprises a second rocker arm shell, a second cutting drum and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are in transmission connection with an output shaft of a cutting motor; the cutting coal mining method comprises the following steps: firstly, adjusting a short-body thin coal seam coal mining machine; secondly, cutting the thin coal seam; and thirdly, repeating the first step and the second step for multiple times until the mining of the whole coal face is completed.
Therefore, the reliability of the cutting rocker directly influences the yield of the working face, the cutting rocker is an important part of a coal mining machine, and the cutting rocker has the main functions of coal dropping and coal cutting and consumes 80% of the power of the whole machine. In the working process, the torque transmission function is realized, and the bending moment from the cutting drum is borne, so that the cutting rocker arm not only has high power and heavy load, but also has very bad working conditions. The connecting pin bores are susceptible to significant wear.
The three damaged pin shaft holes have the same diameter and are concentric holes, the concentricity requirement is extremely high, the faults are all sent to outsourcing for maintenance before, and the holes are re-machined by using a large boring machine, but the time consumption is long, and the repair cost is high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problems that the abrasion of a hinged shaft hole of a cutting rocker arm is serious, the existing repairing mode is long in time consumption and high in repairing cost are solved.
The invention solves the technical problems through the following technical means:
the method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine comprises the following steps that:
s01, respectively installing two first workpieces at the outer sides of two ear seats at the outermost side of the cutting rocker arm in a detachable mode, placing a plurality of pairs of second workpieces between adjacent ear seats of the cutting rocker arm, and attaching the second workpieces to the side surfaces of the ear seats; the first workpiece is provided with a first central hole at the center, and the second workpiece is provided with a second central hole at the center;
s02: the steel pipe penetrates through the first workpiece, the lug seat and the second workpiece;
s03: welding a second workpiece on the side surface of the lug seat, and then drawing out the steel pipe;
s04: expanding a first center hole of the first workpiece to be the same as the aperture of the original hinged shaft hole, and expanding a second center hole of the second workpiece to be the same as the aperture of the original hinged shaft hole;
s05, filling the damaged hinged shaft holes to be the same as the diameters of the first center hole and the second center hole in the step SO4 by manual surfacing;
s06: and after the filling, the first workpiece and the second workpiece are dismounted, and the repair is finished.
The steel pipe penetrates through the first workpiece, the lug seat and the second workpiece, the coaxiality of the hinge shaft hole is ensured, then the inner holes of the first workpiece and the second workpiece are sequentially expanded to be consistent with the original designed hole diameter of the hinge shaft hole, at the moment, a gap exists between the worn hinge shaft hole and the original hinge shaft hole, and the worn part is subjected to surfacing welding by taking the inner holes of the first workpiece and the second workpiece as a reference until the inner hole diameter of the original hinge shaft is restored; the repair tool and the repair method control the concentricity deviation of the three coaxial holes after maintenance within a specified value, are simple and convenient to operate, can be repeatedly used, greatly reduce the repair time, do not need to distribute other units for repair, save the outlay for repair, and provide precious reference for handling similar faults in the future.
Preferably, the first workpiece is in a circular ring-shaped structure in step S01, the first central hole is a circular hole, the inner diameter of the circular hole is greater than or equal to the outer diameter of the steel pipe, a plurality of screw holes are arrayed along the center of the circular ring, and the first workpiece passes through the plurality of screw holes through a plurality of bolts to be connected with the outermost side of the cutting rocker arm.
Preferably, the first workpiece is detached from the cutting rocker arm in step S04, and the first workpiece and the cutting rocker arm are mounted after the first center hole is enlarged to the same diameter as the original hole diameter of the hinge shaft hole on the lathe.
Preferably, the steel pipe is DN80 steel pipe, and the original hinge shaft hole is 235 mm.
Preferably, the second workpiece comprises a large circular ring and a small circular ring, the small circular ring is embedded in the large circular ring, the inner diameter of the large circular ring is the same as the outer diameter of the small circular ring, the outer diameter of the large circular ring is equal to the aperture of the original hinged shaft hole, and the inner diameter of the small circular ring is the same as the outer diameter of the steel pipe.
The screw holes are not arranged on the inner side of the cutting rocker arm, the large circular ring is spot-welded on the inner side by adopting the two embedded circular rings, and the small circular ring is knocked off in the step S04.
Preferably, the second center hole is equal to the inner diameter of the small ring at step S01, and the second center hole is equal to the inner diameter of the large ring at step S04; in step S04, the small circle is knocked off.
Preferably, the inner diameter of the large circular ring is 235mm, and the outer diameter of the large circular ring is 300 mm.
Preferably, the cutting rocker arm comprises three ear seats, the number of the first workpieces is two, the first workpieces are respectively located on the outer side of the first ear seat and the outer side of the third ear seat, the number of the second workpieces is four, and the second workpieces are respectively located on the other side of the first ear seat, the two sides of the second ear seat and the other side of the third ear seat.
Preferably, the outer diameter of the steel pipe is smaller than the inner diameter of the original hinged shaft hole, and the length of the steel pipe is larger than the width of the cutting rocker arm.
Preferably, in S06, after filling, fine grinding is performed, and then the two first workpieces and the plurality of second workpieces are removed, and the repair is completed.
The invention has the advantages that:
(1) the steel pipe penetrates through the first workpiece, the lug seat and the second workpiece, the coaxiality of the hinge shaft hole is ensured, then the inner holes of the first workpiece and the second workpiece are sequentially expanded to be consistent with the original designed hole diameter of the hinge shaft hole, at the moment, a gap exists between the worn hinge shaft hole and the original hinge shaft hole, and the worn part is subjected to surfacing welding by taking the inner holes of the first workpiece and the second workpiece as a reference until the inner hole diameter of the original hinge shaft is restored; the repair tool and the repair method control the concentricity deviation of the three coaxial holes after maintenance within a specified value, are simple and convenient to operate, can repeatedly use the repair tool, greatly reduce the repair time, do not need to distribute other units for repair, save the outlay for repair, and provide precious reference for handling similar faults in the future;
(2) the screw holes are not arranged on the inner side of the cutting rocker arm, the large circular ring is spot-welded on the inner side by adopting the two embedded circular rings, and the small circular ring is knocked off in the step S04.
Drawings
FIG. 1 is a schematic structural view of a cutting rocker arm according to an embodiment of the present invention;
fig. 2 is a schematic structural view of the first workpiece at step S01;
fig. 3 is a schematic structural view of the first workpiece at step S04;
FIG. 4 is an exploded schematic view of a second workpiece;
fig. 5 is a schematic structural view of the second workpiece at step S01;
fig. 6 is a schematic structural view of the second workpiece at step S04;
FIG. 7 is a schematic structural diagram of step S02;
FIG. 8 is a cross-sectional view of FIG. 7;
FIG. 9 is a schematic structural diagram of step S04;
FIG. 10 is a cross-sectional view of FIG. 9;
reference numbers in the figures: 1. a cutting rocker arm; 11. an ear mount; 12. the hinge shaft hole; 2. a first workpiece; 21. a first central aperture; 22. a screw hole; 3. a second workpiece; 31. a large circular ring; 32. a small circular ring; 33. a second central aperture; 4. a steel pipe;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the cutting rocker arm 1 has a plurality of ear seats 11 arranged at intervals, the ear seats 11 have the same structure, the hinge shaft holes 12 penetrate through the ear seats 11, in this embodiment, the hinge shaft holes 12 of the original design requirement are 235mm, the hinge shaft holes 12 are larger than 235mm after being worn, and the aperture is uneven. In the embodiment, as shown in fig. 7, the cutting rocker arm 1 includes three ear seats 11, and the outer sides of the first ear seat 11 and the third ear seat 11 have threaded holes.
The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine comprises the following steps:
s01, respectively installing the two first workpieces 2 on the outer sides of the two ear seats 11 on the outermost side of the cutting rocker arm 1 in a detachable mode, placing the four second workpieces 3 between the adjacent ear seats 11 of the cutting rocker arm 1, and attaching the second workpieces 3 to the side surfaces of the ear seats 11;
the first workpiece 2 is of a circular ring structure, the first central hole 21 is a circular hole, a plurality of screw holes 22 are arrayed along the center of the circular ring, and the first workpiece 2 penetrates through the screw holes 22 through a plurality of bolts to be connected with the outermost side of the cutting rocker arm 1;
as shown in fig. 2, the first workpiece 2 has a first central hole 21 'at the center, and the first central hole 21' is equal to the outer diameter of the steel pipe 4, in this embodiment, the steel pipe 4 is a steel pipe of DN80, and the outer diameter of the steel pipe 4 is 88.9mm by checking DN80, so that in actual processing, the first central hole 21 'can be processed to 88.5mm, which is slightly smaller than the outer diameter of DN80, so that the first central hole 21' is sufficiently attached to the outer diameter of the steel pipe; the number of the screw holes 22 is 6, and the diameter is 18 mm. Along a circumferential array.
The outer diameter of the steel pipe 4 is smaller than the inner diameter of the original hinged shaft hole 12, and the length of the steel pipe 4 is larger than the width of the cutting rocker arm 1.
As shown in fig. 4, the second workpiece 3 includes a large ring 31 and a small ring 32, the small ring 32 is embedded in the large ring 31, the inner diameter of the large ring 31 is the same as the outer diameter of the small ring 32, the inner diameter of the large ring 31 is 235mm, the outer diameter of the large ring 31 is 300mm, the outer diameter of the large ring 31 is equal to the hole diameter of the original hinge shaft hole, and the inner diameter of the small ring 32 is the same as the outer diameter of the steel pipe 4.
As shown in fig. 5, the second workpiece 3 has a second center hole 33 'at the center, and the second center hole 33' is equal to the inner diameter of the small ring 32, i.e., 88.5mm at step S01;
as shown in fig. 7, in this embodiment, two first workpieces 2 are located on the outer side of the first ear seat 11 and the outer side of the third ear seat 11, respectively, and four second workpieces 3 are located on the other side of the first ear seat 11, the two sides of the second ear seat 11, and the other side of the third ear seat 11, respectively.
S02: as shown in fig. 7 and 8, the steel pipe 4 is inserted through the leftmost first workpiece 2, the first ear mount 11, the pair of second workpieces 3, the second ear mount 11, the pair of second workpieces 3, the third ear mount 11, and the rightmost first workpiece 2;
s03: respectively spot-welding the second workpiece 3 on the side surfaces of the lug seats 11 by using an electric welding machine, and then drawing out the steel pipe 4;
s04: as shown in fig. 9 and 10, the first center hole 21' of the first workpiece 2 is enlarged to have the same diameter as that of the original hinge shaft hole, as shown in fig. 3, where the first center hole 21 "is 235mm,
knocking off the small circular ring 32 in the second workpiece 3, and combining with the illustration of fig. 6, the second central hole 33 "has become the same as the original hinged shaft hole in diameter, which is 235 mm; two sides of the lug seat 11 in the middle of the cutting rocker arm 1 and the inner side of the lug seat 11 on the outer side are not provided with screw holes, two embedded circular rings are adopted, the large circular ring 31 is spot-welded on the inner side, and in step S04, the small circular ring 32 is knocked off.
At the moment, the inner diameter of the first workpiece 2 and the inner diameter of the second workpiece 3 are both 235mm and are the same as the hinged shaft hole 12 of the original design requirement;
s05, filling the damaged hinged shaft hole 12 to be the same as the diameters of the first center hole 21 'and the second center hole 33' in the step SO4 by manual overlaying welding;
s06: and after the filling, the first workpiece 2 and the second workpiece 3 are unloaded, and the repair is completed.
In the embodiment, the steel pipe 4 passes through the first workpiece 2, the lug seat 11 and the second workpiece 3, the coaxiality of the hinge shaft hole 12 is ensured, then the inner holes of the first workpiece 2 and the second workpiece 3 are sequentially expanded to be consistent with the aperture of the originally designed hinge shaft hole 12, at the moment, a gap exists between the worn hinge shaft hole 12 and the original hinge shaft hole, and the worn part is subjected to surfacing welding by taking the inner holes of the first workpiece 2 and the second workpiece 3 as a reference until the inner hole diameter of the original hinge shaft is restored; the concentricity deviation of the three coaxial holes after maintenance is controlled to be within a specified value, the repairing tool and the repairing method are simple and convenient to operate, the repairing tool can be repeatedly used, the repairing time is greatly shortened, other units are not required to be allocated for repairing, the external repair cost is saved, and meanwhile, precious reference is provided for treating similar faults in the future.
The second embodiment:
on the basis of the first embodiment, in step S04, the first workpiece 2 is detached from the cutting arm 1, the first central hole 21' is expanded to the same diameter as the original hinged shaft hole on the lathe, and then the first workpiece 2 is mounted and connected to the cutting arm 1.
In step S06, after the filling, the two first workpieces 2 and the four second workpieces 3 are removed by fine polishing, and the welding spots of the second workpieces 3 are removed by using a chisel, thereby completing the repair.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine is characterized in that the cutting rocker arm is provided with a plurality of lug seats arranged at intervals, the lug seats have the same structure, and the hinged shaft hole penetrates through the lug seats, and the method comprises the following steps:
s01, respectively installing two first workpieces on the outer sides of two ear seats on the outermost side of the cutting rocker arm in a detachable mode, placing a plurality of pairs of second workpieces between the adjacent ear seats of the cutting rocker arm, and attaching the second workpieces to the side faces of the ear seats; the first workpiece is provided with a first central hole at the center, and the second workpiece is provided with a second central hole at the center;
s02: the steel pipe penetrates through the first workpiece, the lug seat and the second workpiece; ensuring the coaxiality of the first central hole and the second central hole with the original hinge shaft hole;
s03: welding a second workpiece on the side surface of the lug seat, and then drawing out the steel pipe;
s04: expanding a first center hole of the first workpiece to be the same as the aperture of the original hinged shaft hole, and expanding a second center hole of the second workpiece to be the same as the aperture of the original hinged shaft hole;
s05, filling the damaged hinged shaft holes to be the same as the diameters of the first center hole and the second center hole in the step SO4 by manual surfacing;
s06: and after the filling, finely polishing, and unloading the first workpiece and the second workpiece to finish repairing.
2. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 1, wherein the first workpiece is in a circular ring shape in the step S01, the first central hole is a circular hole, the inner diameter of the first central hole is larger than or equal to the outer diameter of the steel pipe, a plurality of screw holes are arrayed along the center of the circular ring, and the first workpiece passes through the plurality of screw holes through a plurality of bolts to be connected with the outermost side of the cutting rocker arm.
3. The method for repairing the articulated shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 2, wherein the first workpiece is detached from the cutting rocker arm at step S04, and the first workpiece is mounted with the cutting rocker arm after the first center hole is expanded to the same diameter as the original articulated shaft hole on the lathe.
4. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 2, wherein the steel pipe is DN80 steel pipe, and the original hinged shaft hole is 235 mm.
5. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 1, wherein the second workpiece comprises a large circular ring and a small circular ring, the small circular ring is embedded in the large circular ring, the inner diameter of the large circular ring is the same as the outer diameter of the small circular ring, the outer diameter of the large circular ring is equal to the bore diameter of the original hinged shaft hole, and the inner diameter of the small circular ring is the same as the outer diameter of the steel pipe.
6. The method for repairing the articulated shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 5, wherein the second center hole is equal to the inner diameter of the small circular ring at the step S01, and the second center hole is equal to the inner diameter of the large circular ring at the step S04; in step S04, the small circle is knocked off.
7. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 5, wherein the inner diameter of the large circular ring is 235mm, and the outer diameter of the large circular ring is 300 mm.
8. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 1, wherein the cutting rocker arm comprises three lug seats, the number of the first workpieces is two, and the first workpieces are respectively located on the outer side of the first lug seat and the outer side of the third lug seat, the number of the second workpieces is four, and the second workpieces are respectively located on the other side of the first lug seat, the two sides of the second lug seat and the other side of the third lug seat.
9. The method for repairing the hinged shaft hole of the cutting rocker arm of the coal mining machine as claimed in claim 1, wherein the outer diameter of the steel pipe is smaller than the inner diameter of the original hinged shaft hole, and the length of the steel pipe is larger than the width of the cutting rocker arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011111448.2A CN112222754B (en) | 2020-10-16 | 2020-10-16 | Method for repairing hinged shaft hole of cutting rocker arm of coal mining machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011111448.2A CN112222754B (en) | 2020-10-16 | 2020-10-16 | Method for repairing hinged shaft hole of cutting rocker arm of coal mining machine |
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| CN112222754A CN112222754A (en) | 2021-01-15 |
| CN112222754B true CN112222754B (en) | 2022-06-07 |
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| CN202011111448.2A Active CN112222754B (en) | 2020-10-16 | 2020-10-16 | Method for repairing hinged shaft hole of cutting rocker arm of coal mining machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2901246B1 (en) * | 2006-05-19 | 2008-06-20 | Airbus France Sas | METHOD FOR REPAIRING A DAMAGED ZONE OF AN AIRCRAFT FUSELAGE |
| CN202317580U (en) * | 2011-11-16 | 2012-07-11 | 安徽天一重工股份有限公司 | Novel insert bush for repairing inner holes of continuous casting rollers |
| CN103028891B (en) * | 2013-01-15 | 2015-10-21 | 株洲南方燃气轮机成套制造安装有限公司 | The welding and restoring process of mounting edge endoporus after rear overcoat |
| CN103335027B (en) * | 2013-07-17 | 2015-12-23 | 烟台开发区蓝鲸金属修复有限公司 | A kind of cross axle cross bag gimbal coupling and restorative procedure thereof |
| CN111318785A (en) * | 2018-12-17 | 2020-06-23 | 天津市英源焊接技术有限公司 | Process for overlaying aluminum bronze on inner surface of coal mine liquid support 27SiMn oil cylinder |
| CN111531319A (en) * | 2020-05-08 | 2020-08-14 | 河南柴油机重工有限责任公司 | Method for repairing main shaft hole of internal combustion engine body and application |
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