CN112139632A - Remanufacturing method of guide sliding shoe - Google Patents
Remanufacturing method of guide sliding shoe Download PDFInfo
- Publication number
- CN112139632A CN112139632A CN202011033366.0A CN202011033366A CN112139632A CN 112139632 A CN112139632 A CN 112139632A CN 202011033366 A CN202011033366 A CN 202011033366A CN 112139632 A CN112139632 A CN 112139632A
- Authority
- CN
- China
- Prior art keywords
- wear
- welding
- guide
- remanufacturing
- cracks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a remanufacturing method of a guide sliding shoe, which comprises the following steps: the method has the advantages that the grinding process after overlaying the wear-resistant layer is omitted, labor intensity of workers is reduced, time is saved, meanwhile, the wear-resistant layer is made of the same material, size and wear-resistant hardness are easy to guarantee, grinding resistance is enhanced, the service cycle is prolonged, the defects that the surface of the wear-resistant layer is uneven and the hardness is uneven due to the fact that the wear-resistant layer cannot be subjected to grinding in place are overcome, the walking effect of the coal mining machine is good, and wear of a conveyor is reduced.
Description
Technical Field
The invention relates to the technical field of guide slipper processing, in particular to a guide slipper remanufacturing method.
Background
The guide shoe is one of the important parts of the coal mining machine, and not only bears the weight of the whole coal mining machine, but also slides on the surface of the pin row in a friction manner, so that the guide shoe is required to have high strength and toughness and high wear resistance. In practical use, the guide sliding shoe is listed as one of vulnerable parts of the coal mining machine, and the guide sliding shoe needs to be repaired or scrapped every time the coal mining machine is overhauled, so that adverse effects and economic losses are brought to coal mine production.
The easily damaged part of the guide sliding shoe is mainly a guide groove, when the wear-resistant surface of the guide groove is seriously worn, the guide performance of the guide sliding shoe is influenced, the walking wheel and the pin row cannot be normally meshed, the walking wheel is easily and quickly worn or broken, and the coal mining machine can be separated from the conveyor to be incapable of normally working and accidents occur in serious cases.
Because the guide sliding shoe is a casting, if the guide sliding shoe is cast again and machined, the period is long, and the underground coal mining progress of a coal mine is seriously influenced. The existing remanufacturing process of the guide shoe is a surfacing wear-resistant layer, and has the following conditions: firstly, the surfacing surface is uneven due to the operator. And secondly, due to the difference between the material of the guide sliding shoe and the components of the wear-resistant welding rod, a transition layer is built up between the guide sliding shoe and the wear-resistant welding rod sometimes, the depth of the built-up wear-resistant layer is not uniform, and the depth of the wear-resistant layer is difficult to control. Both of these conditions not only cause damage to the surface of the conveyor, but also make the wear cycle of the wear layer difficult to control. Although the unevenness condition of the wear-resistant layer can be improved by the subsequent coping of surfacing, the depth of the wear-resistant layer can be influenced, the strength of the wear-resistant layer after surfacing is reduced, the service life is influenced, and the size of the wear-resistant layer cannot be ensured. If the wearing layer after build-up welding is machined by a machine tool, due to the hardness limitation of the wearing layer, only expensive superhard alloy cutters can be selected, the remanufacturing cost is increased, the period is prolonged, and the initial purposes of saving the cost and shortening the time in overhaul are overcome.
Disclosure of Invention
The invention provides a remanufacturing method of a guide sliding shoe, which does not need to be polished or machined by a machine tool after remanufacturing, has the advantages of easily ensured size, attractive appearance and good guide effect, and reduces the abrasion to a conveyor.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of remanufacturing a guide shoe comprising the steps of:
s1: processing a guide groove of the guide sliding shoe to remove the original wear-resistant layer and expose a guide sliding shoe substrate;
s2: processing a chamfer at the port of the guide groove, welding a wear-resistant plate on the surface of the guide sliding shoe base body, arranging a first groove matched with the chamfer on the wear-resistant plate positioned at the port along the length direction of the wear-resistant plate, and arranging second grooves on the joints of the adjacent wear-resistant plates along the length direction of the wear-resistant plates;
s3: and performing stress relief annealing after welding.
Preferably, in step S1, the processing amount is 8-9 mm.
Preferably, the thickness of the wear-resistant plate is the same as the processing amount, the width of the wear-resistant plate is 1-2 times the width of the guide groove, welding corners are welded at two ends of the wear-resistant plate along the length direction of the wear-resistant plate, the length of the wear-resistant plate is the length of the guide groove, the width of the welding corners at the two ends of the wear-resistant plate is reduced, and the height of the welding corners is the thickness of the wear-resistant plate.
Preferably, in the step S2, the wear plate is welded by arc welding with a welding rod or gas shielded welding, preheating is performed before welding, the preheating temperature is 250-.
Preferably, an arc welding is carried out by adopting a J506/J507 welding rod, the diameter of the welding rod is 3.2mm, the welding current is 90-130A, the welding rod is dried before welding, the drying temperature is 300-350 ℃, the drying time is 1-1.5 h, and the welding rod is placed in a heat preservation box for heat preservation.
Preferably, the gas shielded welding is carried out by using ER 50-6 and equivalent welding wires, the diameter of the welding wire is 1.2mm, and the welding current is 180-220A.
Preferably, in step S3, the guide shoe is placed into a furnace and heated to 350 + -10 ℃, the heating speed is 110-.
Preferably, the remanufacturing standard of the guide shoe is as follows:
(1) the guide sliding shoe and pin row matching surfaces comprise an upper matching surface, a lower matching surface, a left matching surface and a right matching surface, the limit value of the unilateral abrasion gap between the upper matching surface and the lower matching surface is 7-8 mm, the limit value of the unilateral abrasion gap between the left matching surface and the right matching surface is 5.5-7 mm, when the unilateral abrasion gap of any matching surface reaches the limit value, the guide sliding shoe needs to be remanufactured, and the abrasion gap does not contain an initial gap after installation and debugging;
(2) the appearance of the guide sliding shoe is not broken or lost;
(3) the guide shoe did not develop irreparable cracks, including those that could not be planed for repair and those that required planing through the body of the guide shoe for repair.
Preferably, when repairable cracks exist in the guide shoe, firstly, crack stopping holes are drilled at two ends of the cracks, the distance between the crack stopping holes and the ends of the cracks is 10-15 mm, the hole diameter is 5-10 mm, the depth of the crack stopping holes is not less than the depth of the cracks, then, the cracks are planed and wide cracks are uniformly planed to form second grooves or grooves, and filling materials are adopted to repair and weld the cracks.
Preferably, step S3 is followed by polishing the weld joint and detecting the appearance and quality of the weld joint.
The invention has the beneficial effects that:
compared with the prior art, the method has the advantages that the grinding process after the wear-resistant layer is overlaid is omitted, the labor intensity of workers is reduced, the time is saved, meanwhile, the wear-resistant layer is made of the same material, the size and the wear-resistant hardness are easy to guarantee, the wear-resistant performance is enhanced, the service cycle is prolonged, the defects of uneven surface and uneven hardness of the wear-resistant layer due to the fact that the wear-resistant layer cannot be ground can be avoided, the walking effect of the coal mining machine is good, and the abrasion to a conveyor is reduced.
Description of the drawings:
FIG. 1 is a schematic view of a guide shoe in combination with a wear layer.
In the drawings: 1-guide sliding shoes, 2-wear-resistant layers and 3-guide grooves.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a method for remanufacturing a guide shoe includes the steps of:
firstly, determining whether the guide sliding shoe 1 meets the remanufacturing standard, specifically, checking whether the guide sliding shoe 1 has appearance defects such as damage and loss, whether the guide groove 3 and other parts have cracks and cracks, the abrasion degree of an original wear-resistant layer of the guide groove 3, the roughness conditions of various sizes, form and position tolerances and surfaces, and the hardness conditions of the guide sliding shoe 1 and the original wear-resistant layer, performing nondestructive detection on the whole guide sliding shoe 1, and determining whether other hidden defects exist.
The remanufacturing standard is as follows: the matching surfaces of the guide sliding shoe 1 and the pin row comprise an upper matching surface, a lower matching surface, a left matching surface and a right matching surface, the limit value of the unilateral abrasion gap between the upper matching surface and the lower matching surface is 7-8 mm, the limit value of the unilateral abrasion gap between the left matching surface and the right matching surface is 5.5-7 mm, when the unilateral abrasion gap of any matching surface reaches the limit value, the guide sliding shoe 1 needs to be remanufactured, and the abrasion gap does not contain an initial gap after installation and debugging. The guide shoe 1 has no break or loss in appearance. The guide shoe 1 is free of irreparable cracks, including those that cannot be planed for repair and those that require planing through the body of the guide shoe 1 for repair. The guide shoe 1 needs to meet all the above criteria at the same time for remanufacturing.
And secondly, carrying out crack treatment on the guide sliding shoe 1 which meets the remanufacturing standard and has cracks, drilling crack arrest holes at two ends of the cracks, wherein the distance between the crack arrest holes and the ends of the cracks is 10-15 mm, the aperture is 5-10 mm, the depth of the crack arrest holes is not less than the depth of the cracks, preferably, the depth of the crack arrest holes slightly exceeds the depth of the cracks, digging the cracks, uniformly opening wide cracks to form a second groove or a groove, not allowing sharp notches, and having a certain arc slope at two ends of the second groove or the groove until the cracks are removed completely, and carrying out flaw detection. As the base material of the guide sliding shoe 1 belongs to low-alloy steel castings, low-matching or equal-matching materials are selected as filling materials for repairing and welding cracks.
And thirdly, processing the guide groove 3 of the guide sliding shoe by 8-9 mm to remove the original wear-resistant layer and expose the base body of the guide sliding shoe 1. The original wear-resistant layer is generally formed by two processes of surfacing and surface induction quenching, the surfacing thickness required by the surfacing process is generally 6mm, the depth required by the surface induction quenching process is not less than 6mm, and the depth of the actually survived layer is close to 7-8 mm, so that the original wear-resistant layer can be removed by machining the wear-resistant layer with the machining amount of 8-9 mm.
And fourthly, processing chamfers at the ports of the guide grooves 3, welding a wear plate 2 on the surface of the base body of the guide slipper 1 to form a wear-resistant layer, and selecting an NM500 wear plate (equivalent to Rockwell hardness of 52-57 HRC). The antifriction plate 2 that is located the port department sets up the first groove that matches with the chamfer along its length direction, and the second groove is all seted up along its length direction in the department of meeting of adjacent antifriction plate 2, the welding of being convenient for. The NM500 wear-resistant plate has the characteristics of high wear resistance, high toughness and high strength, the Brinell hardness value reaches 500(HBW), and the material is used on occasions or parts needing wear resistance, so that the maintenance and shutdown times are reduced, and the capital investment is reduced.
Meanwhile, the size of the wear-resistant plate 2 is set according to the plane size of the guide groove 3, specifically, the thickness of the wear-resistant plate 2 is the same as the processing amount, the width of the wear-resistant plate is 1-2 times the thickness of the wear-resistant plate 2 subtracted from the width of the guide groove 3, the two ends of the wear-resistant plate 2 in the length direction are welded into welding angles, the height of each welding angle is the thickness of the wear-resistant plate 2, and the length of the wear-resistant plate 2 is the width of the welding angles at the two ends subtracted from the. In addition, according to the planar structure of guide way 3, need to weld 8 antifriction plate 2 in the guide way 3 (two department ports of guide way 3 are 8 antifriction plate 2 altogether), the unloading process of antifriction plate 2 can go on together with the process of processing falling original wearing layer, saves time, and the cell wall of the antifriction plate 2 laminating guide way 3 after the processing is placed.
Welding the wear-resisting plate 2 by adopting shielded metal arc welding or gas shielded welding, preheating before welding at the preheating temperature of 250-300 ℃, adopting multilayer and multi-pass welding, monitoring the temperature in real time in the welding process until the welding is finished, and removing welding slag and checking whether welding defects exist in each layer, so that the next layer can be welded. The interlayer temperature is strictly controlled when welding, preferably less than or equal to 225 ℃, and is preferably less than or equal to 250 ℃, and the welding stress is eliminated and diffused by knocking the periphery of a welding line after welding.
Fifthly, after welding, stress relief annealing is carried out, the guide sliding shoe 1 is placed into a furnace to be heated to 350 +/-10 ℃, the heating speed is 110-120 ℃/h, the temperature is kept for 1.5-2 h, and the guide sliding shoe is cooled to room temperature along with the furnace. In addition, crack repair welding also requires pre-weld preheating, post-weld stress relief annealing, and process parameters may be performed with reference to the welding parameters of the wear plate 2.
And sixthly, polishing the welding line, and detecting the appearance and the quality of the welding line. Specifically, the welding slag, spatter and the like around the weld joint are removed by a wire brush and a wind shovel, and the weld joint higher than the wear-resistant plate 2 is removed by a hand-held grinder and an angle grinder, but the wear-resistant plate 2 cannot be damaged.
Compared with the prior art, the guide sliding shoe 1 has the advantages that a grinding process after overlaying the wear-resistant layer is omitted, the labor intensity of workers is reduced, the harmful influence on the guide sliding shoe 1 and the surrounding environment is reduced, meanwhile, the wear-resistant layer is made of the same material, the size is easy to guarantee, the hardness is the same at each position, the service life is long, the defects that the surface of the wear-resistant layer is uneven and the hardness is uneven due to the fact that the wear-resistant layer cannot be ground can be avoided, the walking effect of the coal mining machine is good, and the wear to a conveyor is reduced.
Example two:
parts of this embodiment that are the same as those of the first embodiment are not described again, except that:
the chamfer angle is 45 degrees, the chamfer angle width is 5mm, 4 chamfer angles are processed totally, the welding angle is 15 degrees, the angle of the second groove is 45 degrees, and the width of the second groove is 5 mm.
Carrying out arc welding by adopting a J506/J507 welding rod, wherein the diameter of the welding rod is 3.2mm, the welding current is 90-130A, drying the welding rod at the temperature of 300-.
After remanufacturing is finished, the appearance and the quality of the welding seam are detected, and the detection result is as follows: the appearance of the welding line is smooth, and the defects of cracks, air holes, slag inclusion, burrs, dirt and the like are avoided; the weld quality meets JBT 6062-20071 level detection; the remanufactured dimension, the form and position tolerance and the roughness meet the design requirements of the original drawing; the hardness test of remanufacturing should conform to GB/T231.1-2018.
Example three:
parts of this embodiment that are the same as the embodiment are not described again, except that:
the ER 50-6 and grade-equivalent welding wire is adopted for gas shielded welding, the diameter of the welding wire is 1.2mm, oil stains and rust stains cannot be caused on the surface of the welding wire, and the welding current is 180-220A.
After remanufacturing is finished, the appearance and the quality of the welding seam are detected, and the detection result is as follows: the appearance of the welding line is smooth, and the defects of cracks, air holes, slag inclusion, burrs, dirt and the like are avoided; the weld quality meets JBT 6062-20071 level detection; the remanufactured dimension, the form and position tolerance and the roughness meet the design requirements of the original drawing; the hardness test of remanufacturing should conform to GB/T231.1-2018.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A guide shoe remanufacturing method is characterized by comprising the following steps of:
s1: processing a guide groove of the guide sliding shoe to remove the original wear-resistant layer and expose a guide sliding shoe substrate;
s2: processing a chamfer at the port of the guide groove, welding a wear-resistant plate on the surface of the guide sliding shoe base body, arranging a first groove matched with the chamfer on the wear-resistant plate positioned at the port along the length direction of the wear-resistant plate, and arranging second grooves on the joints of the adjacent wear-resistant plates along the length direction of the wear-resistant plates;
s3: and performing stress relief annealing after welding.
2. The method of remanufacturing a guide shoe according to claim 1, wherein the machining amount is 8 to 9mm in the step S1.
3. The method for remanufacturing the guide shoe according to claim 2, wherein the wear-resistant plate has a thickness equal to the processed amount, and has a width which is 1 to 2 times the thickness of the wear-resistant plate subtracted from the width of the guide groove, the wear-resistant plate is welded at both ends in the length direction thereof to form a weld angle, the wear-resistant plate has a length which is the length of the guide groove minus the width of the weld angle at both ends, and the height of the weld angle is the thickness of the wear-resistant plate.
4. The method for remanufacturing the guide shoe as claimed in claim 1, wherein in the step S2, the wear plate is welded by shielded metal arc welding or gas shielded welding, the preheating is performed before welding at a preheating temperature of 250 ℃ to 300 ℃, the multilayer multi-pass welding is performed, the temperature is monitored in real time during the welding process, and the interlayer temperature is controlled to be less than or equal to 250 ℃.
5. The method for remanufacturing the guide shoe as claimed in claim 4, wherein arc welding is performed by using a J506/J507 welding rod, the diameter of the welding rod is 3.2mm, the welding current is 90-130A, the welding rod is dried before welding, the drying temperature is 300-350 ℃, the drying time is 1-1.5 h, and the welding rod is placed in a heat preservation box for heat preservation.
6. The method of remanufacturing a guide shoe according to claim 4, wherein ER 50-6 and grade equivalent welding wire is used for gas shielded welding, the diameter of the welding wire is 1.2mm, and the welding current is 180-220A.
7. The method for remanufacturing a guide shoe according to any one of claims 1 to 6, wherein in step S3, the guide shoe is placed in a furnace and heated to 350 ± 10 ℃, the heating speed is 110-.
8. The method of remanufacturing a guide shoe according to claim 7, wherein the guide shoe is remanufactured according to the criteria of:
(1) the guide sliding shoe and pin row matching surfaces comprise an upper matching surface, a lower matching surface, a left matching surface and a right matching surface, the limit value of the unilateral abrasion gap between the upper matching surface and the lower matching surface is 7-8 mm, the limit value of the unilateral abrasion gap between the left matching surface and the right matching surface is 5.5-7 mm, when the unilateral abrasion gap of any matching surface reaches the limit value, the guide sliding shoe needs to be remanufactured, and the abrasion gap does not contain an initial gap after installation and debugging;
(2) the appearance of the guide sliding shoe is not broken or lost;
(3) the guide shoe did not develop irreparable cracks, including those that could not be planed for repair and those that required planing through the body of the guide shoe for repair.
9. The method for remanufacturing the guide shoe according to claim 8, wherein when repairable cracks exist in the guide shoe, the crack stopping holes are drilled at two ends of the cracks, the distance between the crack stopping holes and the ends of the cracks is 10-15 mm, the hole diameter is 5-10 mm, the depth of the crack stopping holes is not less than the depth of the cracks, then the cracks are planed and the cracks are uniformly widened to form a second groove or groove, and the cracks are repaired and welded by filling materials.
10. The method of remanufacturing a guide shoe according to claim 9, further comprising grinding the weld after the step S3 and inspecting the appearance and quality of the weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011033366.0A CN112139632B (en) | 2020-09-27 | 2020-09-27 | Remanufacturing method of guide sliding shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011033366.0A CN112139632B (en) | 2020-09-27 | 2020-09-27 | Remanufacturing method of guide sliding shoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112139632A true CN112139632A (en) | 2020-12-29 |
| CN112139632B CN112139632B (en) | 2022-06-07 |
Family
ID=73895374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011033366.0A Active CN112139632B (en) | 2020-09-27 | 2020-09-27 | Remanufacturing method of guide sliding shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112139632B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798779A (en) * | 2021-10-11 | 2021-12-17 | 国能神东煤炭集团有限责任公司 | Method for repairing sliding shoe of coal mining machine |
| CN117588211A (en) * | 2024-01-18 | 2024-02-23 | 三一重型装备有限公司 | Guide sliding shoe, coal mining machine and guide sliding shoe manufacturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE648066A (en) * | 1963-05-22 | 1964-09-16 | ||
| CN201747373U (en) * | 2010-04-16 | 2011-02-16 | 江苏华飞重工机械有限公司 | Wear guiding slide shoe of additional wear plate for coal mining machine |
| CN203050709U (en) * | 2012-12-25 | 2013-07-10 | 太重煤机有限公司 | High-strength wearable guide boots |
| CN203441489U (en) * | 2013-09-05 | 2014-02-19 | 黑龙江科技学院 | Supporting and guiding device for walking part of coal winning machine |
| CN103624380A (en) * | 2013-11-13 | 2014-03-12 | 中国神华能源股份有限公司 | Method for repairing front delivery channel of continuous miner |
| CN107160102A (en) * | 2017-05-17 | 2017-09-15 | 四川广旺能源发展（集团）有限责任公司机械制造分公司 | A kind of coal face scraper conveyor intermediate channel manufacture craft |
-
2020
- 2020-09-27 CN CN202011033366.0A patent/CN112139632B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE648066A (en) * | 1963-05-22 | 1964-09-16 | ||
| CN201747373U (en) * | 2010-04-16 | 2011-02-16 | 江苏华飞重工机械有限公司 | Wear guiding slide shoe of additional wear plate for coal mining machine |
| CN203050709U (en) * | 2012-12-25 | 2013-07-10 | 太重煤机有限公司 | High-strength wearable guide boots |
| CN203441489U (en) * | 2013-09-05 | 2014-02-19 | 黑龙江科技学院 | Supporting and guiding device for walking part of coal winning machine |
| CN103624380A (en) * | 2013-11-13 | 2014-03-12 | 中国神华能源股份有限公司 | Method for repairing front delivery channel of continuous miner |
| CN107160102A (en) * | 2017-05-17 | 2017-09-15 | 四川广旺能源发展（集团）有限责任公司机械制造分公司 | A kind of coal face scraper conveyor intermediate channel manufacture craft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798779A (en) * | 2021-10-11 | 2021-12-17 | 国能神东煤炭集团有限责任公司 | Method for repairing sliding shoe of coal mining machine |
| CN117588211A (en) * | 2024-01-18 | 2024-02-23 | 三一重型装备有限公司 | Guide sliding shoe, coal mining machine and guide sliding shoe manufacturing method |
| CN117588211B (en) * | 2024-01-18 | 2024-04-12 | 三一重型装备有限公司 | Guide sliding shoe, coal mining machine and guide sliding shoe manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112139632B (en) | 2022-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112139632B (en) | Remanufacturing method of guide sliding shoe | |
| US10167529B2 (en) | Hardfacing process and parts produced thereby | |
| CN103192224B (en) | Metallurgical continuous casting machine roller repairing method | |
| AU2015100907A4 (en) | Method of remanufacturing scraper conveyor | |
| CN104924018A (en) | On-site repairing method for large motor rotor large section cracks | |
| CN109128683B (en) | Method for repairing hydraulic end valve box inner cavity and plunger end sealing hole | |
| CN104439881A (en) | Laser cladding and on-line machining repair method for roughing mill housing roller positioning groove | |
| CN111168322A (en) | Repair welding process of nodular cast iron roller | |
| CN112453661A (en) | Welding manufacturing method for controlling thermal deformation of cross-shaped steel column | |
| CN113774378A (en) | Composite cladding remanufacturing method of coal mine wear-resistant toothed plate | |
| CN113427219B (en) | Manufacturing method of large steel Yankee dryer | |
| CN105803453A (en) | Engine crankshaft fatigue crack laser repairing and strengthening device and method | |
| CN112496667A (en) | Special rod guide plate surfacing repair process | |
| CN108994523B (en) | Method for reinforcing and transforming column nest of hydraulic support base | |
| CN112388245A (en) | Welding repair method for broken teeth of large gear of ball mill | |
| CN111215830A (en) | Method for repairing cracks of high-pressure medium-carbon cast steel oil cylinder body with thickness larger than 200mm | |
| CN105817833A (en) | Repairing method for electric shovel bucket | |
| CN114603234A (en) | Method for welding 42CrMo alloy steel and low-carbon steel dissimilar steel | |
| US10669602B2 (en) | Hardfacing process and parts produced thereby | |
| CN110732751A (en) | welding process method for moving cone lining plate and locking bolt of cone crusher | |
| CN113664469A (en) | Manufacturing method for improving reliability of spraying and lubricating flow channel of rocker arm shell of coal mining machine | |
| Duncan | Turbine repair | |
| CN111889958B (en) | Abrasion repairing method for movable guide vane of water turbine | |
| RU2104141C1 (en) | Method for repair of parts of metallurgical equipment | |
| CN116532758A (en) | Online welding device and repairing process for cracks of large ball mill cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |