CN103448026A - Method for fetching broken bolts from bolt holes - Google Patents
Method for fetching broken bolts from bolt holes Download PDFInfo
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- CN103448026A CN103448026A CN201310344619XA CN201310344619A CN103448026A CN 103448026 A CN103448026 A CN 103448026A CN 201310344619X A CN201310344619X A CN 201310344619XA CN 201310344619 A CN201310344619 A CN 201310344619A CN 103448026 A CN103448026 A CN 103448026A
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- bolt
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- break
- bolt hole
- break bolt
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Abstract
The invention relates to a method for fetching broken bolts from bolt holes. The method includes steps of selecting a steel tube; pressing plastic clay into a bolt hole with the corresponding broken bolt, compacting the plastic clay and then fetching the plastic clay; grinding the outer wall of one end of the steel tube to so that the shape of the ground outer wall of the end of the steel tube is identical or similar to that of the cross section of the broken bolt according to a shape which is printed on the plastic clay and corresponds to the cross section of the broken bolt, and grinding an oblique surface with an oblique angle ranging from 60 degrees to 80 degrees on a circle of the inner wall of the steel tube; placing the machined steel tube into the bolt hole, firmly welding the steel tube with an end surface of the bolt and finally fetching the broken bolt by the aid of a tool with high clamping force. The outer diameter of the steel tube is smaller than the inner diameter D1 of threads of the broken bolt, the wall thickness of the steel tube is 15-25% of the inner diameter D1 of the threads of the broken bolt, and the outer diameter D2 of the steel tube meets the condition that D2/D1X100% is within the range from 70% to 90%. The method has the advantages that the broken bolt can be fetched without perforation, and accordingly the damage probability of the threads of a body of the broken bolt due to perforation can be effectively reduced; the broken bolt fetching difficulty can be reduced, the broken bolt fetching time can be effectively shortened, and safe and stable running of corresponding equipment can be timely restored.
Description
Technical field
The present invention relates to a kind ofly from taking out the method for break bolt in screwed hole, belong to plant equipment Fracture bolt and take out technology field.
Background technology
At present for large (the internal thread diameter D of diameter
1whether whether break bolt>=10mm), exceed body according to break bolt, can use the instrument that clamping force is strong (as locking pliers, hand-held vise) to clamp the break bolt exposed portions serve, becomes flexible and take out break bolt and will take out break bolt technique and be divided into two classes:
1, break bolt exceeds body, uses the strong instrument of clamping force it can be taken out.
If break bolt exceeds body, first use metal-derusting, lubricant (or kerosene) to infiltrate the threaded engagement place, after certain hour, use hand hammer, copper rod etc. to discharge the threaded pre-tightening power between break bolt and body along bolt shaft to knocking body, then use the tool holder Broken bolt exposed portions serve that clamping force is strong, become flexible and take out break bolt, being illustrated in fig. 1 shown below.
Though 2, break bolt exceeds body but uses the strong instrument of clamping force to take out or break bolt is illustrated in fig. 2 shown below lower than body.
For this kind of situation, mainly contain at present after the break bolt central punch that built-up welding is taken out, tapping is taken out, knocked in after the break bolt central punch after the square metal cylinder takes out, uses electric spark to be ablated off break bolt four kinds of methods such as again making screw thread and takes out break bolt after the break bolt central punch, now be described in detail as follows:
1) after the break bolt central punch, built-up welding is taken out
In order to draw brill, then with electric drill, load onto little drill bit (bit diameter D in bolt section central punch (can determine that centre bore is directly connected to the complexity of taking out bolt at the break bolt section part) with centre punch or with the centering magnetic drill
1/ break bolt internal thread diameter D
1*, 100% ≈ 25%) in the boring of section central punch place, hole drill takes off little drill bit after thoroughly, changes large drill bit (bit diameter D
2/ break bolt internal thread diameter D
1* 100% ≈ 70%) hole of Broken bolt is enlarged and bores.
The welding rod of cut-off footpath below 3.2 millimeters adopts medium and small electric current to carry out from inside to outside built-up welding in the boring of Broken bolt, the position that built-up welding starts get Broken bolt length half get final product, while starting built-up welding, striking is not wanted long in order to avoid the Broken bolt outer wall is burnt.Built-up welding continues the cylinder that built-up welding goes out a diameter 80% break bolt internal thread diameter and exceeds body end face 20mm to the break bolt section again.
Built-up welding well makes break bolt axially produce vibrations along it with its end of hand hammer hammering afterwards.Produce and become flexible between the screw thread that the heat produced due to electric arc before this and cooling vibrations of adding now subsequently can make Broken bolt and body.Examine the column cap of nut sleeve in built-up welding that has micro-iron rust desirable cylinder gone out with built-up welding when incision position spills to match after finding to knock and by both seam.After seam micro-cool while hot with double offset ring spanner be enclosed within on nut left and right back and forth twisting can take out break bolt.
2) after the break bolt central punch, tapping is taken out
In order to draw brill, then with electric drill, load onto little drill bit (bit diameter D in bolt section central punch (can determine that centre bore is directly connected to the complexity of taking out bolt at the break bolt section part) with centre punch or with the centering magnetic drill
1/ break bolt internal thread diameter D
1* 100% ≈ 25%) after section central punch place boring (hole depth is about half of Broken bolt length), change large drill bit (bit diameter D
2/ break bolt internal thread diameter D
1* 100% ≈ 70%) reaming.
Adopt with the matched left-hand thread screw tap of institute's reaming and (if the relative screw diameter of screw tap is thicker, the possibility of the thin damage internal thread of screw rod wall can occur when embedding; Diameter is thinner, and the danger of screw tap in breaking at bolt hole can occur when rotating.) the tapping screw thread (be illustrated in fig. 3 shown below) contrary with the break bolt screw thread in hole, then use pliers or spanner left-hand thread direction to rotate screw tap and take out break bolt.
3) knocking in square (or hexagon) metal cartridge after the break bolt central punch takes out
In order to draw brill, then use electric drill den bohrkopf einsetzen (bit diameter D in bolt section central punch (can determine that centre bore is directly connected to the complexity of taking out bolt at the break bolt section part) with centre punch or with the centering magnetic drill
1/ break bolt internal thread diameter D
1* 100% ≈ 50%) in section central punch place boring (hole depth is about half of Broken bolt length).
Select the metal slightly hard than the break bolt material to make square (or hexagon) cylinder, cylinder length should meet it and embed behind break bolt hole still higher than the about 20mm of body end face, and column diameter should be identical with the institute bore diameter.This metal cartridge was embedded in boring after (insert depth is about hole depth), and the instrument (as locking pliers, hand-held vise) strong by clamping force is oppositely loosening, can take out break bolt and does not damage screw thread.
4) break bolt is bored after removing and again make screw thread
If the screw of break bolt allows to strengthen, available drill bit all bores break bolt except reaming again, and the standard thread then strengthened with the screw tap tapping gets final product.(several method that screw dismounting and fracture of wire take out, mining machinery the 33rd volume the 3rd phase in 2005, P88 opens ten thousand east).
If the screw of break bolt does not allow to strengthen, can select than the drill bit of the little 0.5-1mm of major diameter of thread, break bolt is bored and removed, pick out remaining thread material with sharp flat chisel, then get final product with the screw tap rethreading.(the 21st the 6th phase of volume in 2003, Zhao Guo Jianguo Jiangxi is clear, P49) for the method for Pulling out Bolt without Top of Turbine-generator, Inner Mongol power technology.
The break bolt removing method all needs, to the break bolt punching, in the situation that narrow space maybe can't be determined the break bolt center, to be difficult for enforcement drilling operation or drilling operation difficulty very big at present in sum.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of from taking out the method for break bolt in screwed hole, though overcome for break bolt exceed body use the strong instrument of clamping force to take out or break bolt lower than body, all need break bolt is punched, in the situation that narrow space maybe can't be determined the break bolt center, be difficult for implementing drilling operation or the great defect of drilling operation difficulty.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of from taking out the method for break bolt in bolt hole, when described break bolt section is the acclive inclined-plane of tool, comprise the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
1, wall thickness is described break bolt bottom diameter D
115%～25% steel pipe, described outer diameter of steel pipes is set as D
2, wherein said outer diameter of steel pipes meets D
2/ D
1* 100% in 70% to 90% scope; After described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80～110 millimeters of body end faces that are provided with described bolt hole;
Step (2), get a block long-pending be full of bolt hole and exceed described bolt hole 40～60 millimeters of body end faces there is toughness and plastic plasticine;
Step (3), inject appropriate Deruster for metal and lubricant in described bolt hole after, then be pressed into described plasticine the bolt hole of described break bolt, after compacting, takes out; Appropriate Deruster for metal and lubricant play lubrication and easily take out the amount of plasticine, can be also the amounts that evenly is coated with the bolt hole inwall;
Step (4), section configuration according to the described break bolt of plasticine mint-mark, described steel pipe one end outer wall is polished to the shape identical or close with section configuration, then described steel pipe inner wall one circle is polished to the inclined-plane (the about length in inclined-plane is 5～10 millimeters) of 60～80 degree;
Step (5), the steel pipe that step (4) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
The invention has the beneficial effects as follows: due to adopted there is the steel pipe of applicable size with break bolt and break bolt is fixed and the inwall of steel pipe polish 60～80 the degree inclined-planes, can firmly realize the fixing of steel pipe and break bolt, the method can be taken out break bolt without punching, can effectively reduce the body screw thread damage probability that boring brings when the situation such as effectively avoiding can't implementing because narrow space maybe can't determine the break bolt center, reduce the take-off time that can effectively shorten break bolt when break bolt is taken out difficulty, can recover in time the relevant device safe and stable operation.
On the basis of technique scheme, the present invention can also do following improvement.
Further, wherein said outer diameter of steel pipes preferably meets D
2/ D
1* 100% is 80%, and its wall thickness is preferably described break bolt bottom diameter D
120%.
Further, after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 100 millimeters of body end faces that are provided with described bolt hole.
Further, the volume of the described plasticine of step (2) is to be full of bolt hole and to exceed 50 millimeters of the body end faces of described bolt hole.
Another kind of the present invention, from taking out the method for break bolt in bolt hole, when described break bolt section is smooth, comprises the following steps:
Step (1), select diameter to be less than described break bolt bottom diameter D
10.5～3 millimeters, wall thickness are described break bolt bottom diameter D
115%～25% steel pipe, after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80～110 millimeters of body end faces that are provided with described bolt hole;
Step (2), polish described steel pipe one end outer wall smooth, then described steel pipe inner wall one circle polished to the inclined-planes (chamfer length is about 5～10 millimeters) of 60～80 degree;
Step (3), the steel pipe that step (2) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
Further, wherein said outer diameter of steel pipes preferably meets D
2/ D
1* 100% is 80%, and its wall thickness is preferably described break bolt bottom diameter D
120%
The accompanying drawing explanation
Fig. 1 is that the instrument that the available technology adopting clamping force is strong takes out the structural representation of break bolt;
Though Fig. 2 is prior art Fracture bolt exceed body use the strong instrument of clamping force to take out or break bolt lower than body, adopt the method for central punch to take out the structural representation of break bolt;
Fig. 3 adopts screw tap to take out the schematic diagram of break bolt after the break bolt central punch in prior art;
Fig. 4 is that the present invention works as break bolt lower than body and has the structural representation figure on the inclined-plane of certain slope
To be that the present invention is a kind of take out outer wall and plasticine after the steel pipe polishing adopted the method for break bolt and be pressed into the mutual or close structural representation of shape taken out after the bolt hole of break bolt and compacting Fig. 5 in bolt hole;
Fig. 6 is that a kind of method of taking out break bolt in bolt hole of the present invention, plasticine is pressed into the shape schematic diagram taken out after the bolt hole of break bolt and compacting;
The structural representation that Fig. 7 is the inclined-plane that a kind of method of taking out break bolt in bolt hole of the present invention, steel pipe inner wall polishes out.
In accompanying drawing, the list of parts of each label representative is as follows:
1, the body that there is bolt hole, 2, break bolt, 3, instrument that clamping force is strong, 4, screw tap, 5, inclined-plane, 6, plasticine is pressed into the shape of taking out after the bolt hole of break bolt and compacting, 7, steel pipe.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
The present invention is a kind of from taking out the method for break bolt in bolt hole, when described break bolt section is the acclive inclined-plane of tool, sets break bolt bottom diameter D
1be 10 millimeters, take out this break bolt and comprise the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
13 millimeters (outer diameter of steel pipes is 7 millimeters), wall thickness are described break bolt bottom diameter D
115% steel pipe (being that outer diameter of steel pipes is 1.5 millimeters), after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80 millimeters of body end faces that are provided with described bolt hole; Described outer diameter of steel pipes is set as D
2, D
2, D
2/ D
1* 100% ≈ 70%.
Step (2), get a block long-pending be full of bolt hole and exceed described bolt hole 40 millimeters of body end faces there is toughness and plastic plasticine;
Step (3), inject appropriate Deruster for metal and lubricant in described bolt hole after, then be pressed into described plasticine the bolt hole of described break bolt, after compacting, takes out;
Step (4), section configuration according to the described break bolt of plasticine mint-mark, described steel pipe one end outer wall is polished to the shape identical or close with section configuration, then described steel pipe inner wall one circle is polished to the inclined-plane (be that angle between horizontal plane and inclined-plane is 60 degree, chamfer length is about 5～10 millimeters) of 60 degree;
Step (5), the steel pipe that step (4) is processed is put into described bolt hole and is firmly welded with described bolt end face, the steel pipe that finally uses the instrument that Chain wrench or clamping force are strong (as locking pliers, hand-held vise) to clamp to expose outside the body end face is slowly rotation from light to heavy, as still do not taken out break bolt, along the gap between outer wall of steel pipe and bolt hole inwall, inject appropriate Deruster for metal and use hand hammer to knock body along the bolt hole direction, then continue rotating steel tube until break bolt is taken out.
Use electric welding machine welding breaking bolt and steel pipe owing to getting in the bolt process, while using Deruster for metal (lubricant or kerosene), should note consumption, be advisable can not play naked light.
The present invention is a kind of from taking out the method for break bolt in bolt hole, when described break bolt section is the acclive inclined-plane of tool, sets break bolt bottom diameter D
1be 10 millimeters, take out this break bolt and comprise the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
11 millimeter (outer diameter of steel pipes is), wall thickness are described break bolt bottom diameter D
125% steel pipe (being that outer diameter of steel pipes is 2.5 millimeters), after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80 millimeters of body end faces that are provided with described bolt hole; Wherein said outer diameter of steel pipes is set as D
2, it meets D
2/ D
1* 100% ≈ 90%;
Step (2), get a block long-pending be full of bolt hole and exceed described bolt hole 60 millimeters of body end faces there is toughness and plastic plasticine;
Step (3), inject appropriate Deruster for metal and lubricant in described bolt hole after, then be pressed into described plasticine the bolt hole of described break bolt, after compacting, takes out;
Step (4), the section configuration according to the described break bolt of plasticine mint-mark, polish the shape identical or close with section configuration by described steel pipe one end outer wall, then described steel pipe inner wall one circle polished to the inclined-plane of 80 degree;
Step (5), the steel pipe that step (4) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
The present invention is a kind of from taking out the method for break bolt in bolt hole, when described break bolt section is the acclive inclined-plane of tool, sets break bolt bottom diameter D
1being 10 millimeters comprises the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
12 millimeters (outer diameter of steel pipes is), wall thickness are described break bolt bottom diameter D
120% steel pipe (being that outer diameter of steel pipes is 2.0 millimeters), after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 100 millimeters of body end faces that are provided with described bolt hole; Wherein said outer diameter of steel pipes is set as D
2, it meets D
2/ D
1* 100% ≈ 80%;
Step (2), get a block long-pending be full of bolt hole and exceed described bolt hole 50 millimeters of body end faces there is toughness and plastic plasticine;
Step (3), inject appropriate Deruster for metal and lubricant in described bolt hole after, then be pressed into described plasticine the bolt hole of described break bolt, after compacting, takes out;
Step (4), the section configuration according to the described break bolt of plasticine mint-mark, polish the shape identical or close with section configuration by described steel pipe one end outer wall, then described steel pipe inner wall one circle polished to the inclined-plane of 70 degree;
Step (5), the steel pipe that step (4) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
Embodiment 4
The present invention is a kind of from taking out the method for break bolt in bolt hole, when described break bolt section is smooth, sets break bolt bottom diameter D
1being 10 millimeters comprises the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
12 millimeters (outer diameter of steel pipes is), wall thickness are described break bolt bottom diameter D
120% steel pipe (being that outer diameter of steel pipes is 2.0 millimeters), after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 100 millimeters of body end faces that are provided with described bolt hole; Wherein said outer diameter of steel pipes is set as D
2, it meets D
2/ D
1* 100% ≈ 80%;
Step (2), polish flat described steel pipe one end outer wall, then described steel pipe inner wall one circle polished to the inclined-plane of 70 degree;
Step (3), the steel pipe that step (2) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. one kind from taking out the method for break bolt in bolt hole, it is characterized in that, when described break bolt section is the acclive inclined-plane of tool, comprises the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
1, wall thickness is described break bolt bottom diameter D
115%～25% steel pipe, described outer diameter of steel pipes is set as D
2, and meet D
2/ D
1* 100% in 70% to 90% scope, and after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80～110 millimeters of body end faces that are provided with described bolt hole;
Step (2), get a block long-pending to be full of bolt hole and to exceed the plasticine of 40～60 millimeters of the body end faces of described bolt hole;
Step (3), inject appropriate Deruster for metal and lubricant in described bolt hole after, then be pressed into described plasticine the bolt hole of described break bolt, after compacting, takes out;
Step (4), the section configuration according to the described break bolt of plasticine mint-mark, polish the shape identical or close with the section configuration of plasticine mint-mark by described steel pipe one end outer wall, then described steel pipe inner wall one circle polished to the inclined-planes of 60～80 degree;
Step (5), the steel pipe that step (4) is processed is put into described bolt hole and is firmly welded with described break bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
2. a kind ofly according to claim 1 from taking out the method for break bolt in bolt hole, it is characterized in that, described thickness of steel pipe is described break bolt bottom diameter D
120%.
3. a kind of from taking out the method for break bolt in bolt hole according to claim 1, it is characterized in that, after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 100 millimeters of body end faces that are provided with described bolt hole.
4. a kind ofly according to claim 1 from taking out the method for break bolt in bolt hole, it is characterized in that, the volume of the described plasticine of step (2) is to be full of bolt hole and to exceed 50 millimeters of the body end faces of described bolt hole.
5. according to claim 1 to 4 any one is described, a kind ofly from taking out the method for break bolt in bolt hole, it is characterized in that, described outer diameter of steel pipes meets D
2/ D
1* 100% is 80%.
6. one kind from taking out the method for break bolt in bolt hole, it is characterized in that, when described break bolt section is smooth, comprises the following steps:
Step (1), select external diameter to be less than described break bolt bottom diameter D
1, wall thickness is described break bolt bottom diameter D
115%～25% steel pipe, described outer diameter of steel pipes is set as D
2, and meet D
2/ D
1* 100% in 70% to 90% scope, and after described steel pipe length L is got described steel pipe one end and described break bolt section is contacted, the other end exceeds the length of 80～110 millimeters of body end faces that are provided with described bolt hole;
Step (2), polish described steel pipe one end outer wall smooth, then described steel pipe inner wall one circle polished to the inclined-planes of 60～80 degree;
Step (3), the steel pipe that step (2) is processed is put into described bolt hole and is firmly welded with described bolt end face, and the steel pipe that finally adopts instrument that Chain wrench or clamping force are strong to clamp higher than the body end face of described bolt hole takes out described break bolt.
7. a kind ofly according to claim 6 from taking out the method for break bolt in bolt hole, it is characterized in that, the diameter of described steel pipe is for being less than described break bolt bottom diameter D
11～2 millimeter, its wall thickness is described break bolt bottom diameter D
120%.
8. according to claim 6 or 7 is described, a kind ofly from taking out the method for break bolt in bolt hole, it is characterized in that, described outer diameter of steel pipes meets D
2/ D
1* 100% is 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310344619.XA CN103448026B (en) | 2013-08-08 | 2013-08-08 | A kind of method of taking out break bolt in bolt hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310344619.XA CN103448026B (en) | 2013-08-08 | 2013-08-08 | A kind of method of taking out break bolt in bolt hole |
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| CN103448026A true CN103448026A (en) | 2013-12-18 |
| CN103448026B CN103448026B (en) | 2015-07-29 |
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105500285A (en) * | 2016-01-04 | 2016-04-20 | 安徽经天金属表面处理科技有限公司 | Process for taking down rusted broken stud screw with screw glue |
| CN107803789A (en) * | 2017-09-30 | 2018-03-16 | 宣化钢铁集团有限责任公司 | Drawing for Broken bolt takes method in a kind of body |
| CN108687715A (en) * | 2018-05-24 | 2018-10-23 | 华润电力风能（汕头潮南）有限公司 | A kind of processing method and relevant device of break bolt information |
| CN112692788A (en) * | 2021-03-01 | 2021-04-23 | 王伟 | Method for taking rusted dead broken screw |
| CN117404097A (en) * | 2023-11-15 | 2024-01-16 | 中建交通建设集团有限公司 | Construction method for taking out broken bolts on cutter head of shield tunneling machine |
| WO2024021638A1 (en) * | 2022-07-26 | 2024-02-01 | 华能新疆能源开发有限公司新能源东疆分公司 | Deep hole broken bolt removal tool for wind turbine hub, and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105500285A (en) * | 2016-01-04 | 2016-04-20 | 安徽经天金属表面处理科技有限公司 | Process for taking down rusted broken stud screw with screw glue |
| CN107803789A (en) * | 2017-09-30 | 2018-03-16 | 宣化钢铁集团有限责任公司 | Drawing for Broken bolt takes method in a kind of body |
| CN108687715A (en) * | 2018-05-24 | 2018-10-23 | 华润电力风能（汕头潮南）有限公司 | A kind of processing method and relevant device of break bolt information |
| CN108687715B (en) * | 2018-05-24 | 2021-05-25 | 华润电力风能（汕头潮南）有限公司 | Processing method of broken bolt information and related equipment |
| CN112692788A (en) * | 2021-03-01 | 2021-04-23 | 王伟 | Method for taking rusted dead broken screw |
| WO2024021638A1 (en) * | 2022-07-26 | 2024-02-01 | 华能新疆能源开发有限公司新能源东疆分公司 | Deep hole broken bolt removal tool for wind turbine hub, and preparation method therefor |
| CN117404097A (en) * | 2023-11-15 | 2024-01-16 | 中建交通建设集团有限公司 | Construction method for taking out broken bolts on cutter head of shield tunneling machine |
| CN117404097B (en) * | 2023-11-15 | 2024-04-16 | 中建交通建设集团有限公司 | Construction method for taking out broken bolts on cutter head of shield tunneling machine |
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| CN103448026B (en) | 2015-07-29 |
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