http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111545990-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B23P11-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23P11-00 |
| filingDate | 2019-02-11^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-06-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111545990-B |
| titleOfInvention | Method for taking out broken interference stud in casing |
| abstract | The invention provides a method for taking out a broken interference stud in a casing, which comprises the following steps: s 1 Selecting a cobalt-containing high-speed steel drill bit to drill and machine a broken interference stud in the casing; s 2 Calculating the diameter of the required drill bit according to the small diameter size of the interference thread on the interference stud and the analyzed main error of the process system; s 3 Milling the upper surface of the broken stud by using a hard alloy milling cutter; s 4 Drilling a point by using a center drill; s 5 Drilling by adopting a high-speed steel drill bit; s 6 And cleaning the residual interference stud in the threaded hole of the casing. The invention solves the problem that a cutter for drilling or milling the fractured high-temperature alloy interference stud in the casing is easy to break, and realizes the high-efficiency and low-cost extraction of various fractured high-temperature alloy interference studs in the casing. The reliability is high, and the popularization value is high. |
| priorityDate | 2019-02-11^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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