CN1851027A - Tappinghole drilling bit - Google Patents
Tappinghole drilling bit Download PDFInfo
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- CN1851027A CN1851027A CN 200510025357 CN200510025357A CN1851027A CN 1851027 A CN1851027 A CN 1851027A CN 200510025357 CN200510025357 CN 200510025357 CN 200510025357 A CN200510025357 A CN 200510025357A CN 1851027 A CN1851027 A CN 1851027A
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- drilling
- steel
- tappinghole
- drilling bit
- tap hole
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Abstract
The invention deals with the aiguille used in the tapping mouth, it is composed of C:<=0.5%, Cr:20-25%, Mo: 1.8-2.2%, W:1.8-2.5%, Ni:1.2-1.5%, Ti:0.7-1.0%, the remaining is Fe; the beneficial effect of the invention is showed below: the time of chopping and drilling to expand the mouth keeps 5-12 minute, the in series drilling and chopping can be realized, the expanding mouth task can be finished once, the producing cost is low.
Description
Technical field
The present invention relates to a kind of drill bit, relate in particular to a kind of Tappinghole drilling bit.
Background technology
Tappinghole drilling bit is considered as important production spare part by each steelworks as the replacing utensil of steel-making converter daily operation always.The speed of steel tapping hole replacement speed is not only concerning the steel-making output of each steel mill, and is concerning the normal operation of each production department from the blast furnace to steel rolling of whole enterprise.
Adopt the steel-making of converter technology, advance steel scrap and hot metal charging and carry out at fire door, tapping (water) has after the converter of being installed in the tap hole of big face realize specially.Just must change when the tap hole bore is too big, the furnace life of general replacement tap hole is 150-180 stove (deciding on each steel mill's situation), and as pressing 36 minutes/stove steel, every converter will be changed a tap hole in 4～5 days, otherwise will influence steel quality.
After converter taphole changes replaceable one form into, the replacing technology is just arisen at the historic moment, in China, each steel mill all adopts cold pump pneumatic pick to drive usually before the eighties in last century, oxygen lance winding-up finishing, install the replacing method that new tap hole is in the milk and seals, not only time-consuming but also require great effort, and inefficiency.After Baosteel builds up, become domestic first employing monoblock type and change the enterprise of tap hole technology, sealing except grouting is the technology that must take, has introduced Japanese a complete set of steel tapping hole replacement Technology and equipment, and the tapping eloquence of China begins to change machinery gradually into by artificial replacing and changes.
The steel tapping hole replacement method of Japan has adopted tracked construction equipment (to claim more to change planes, claim disassembling furnace machine again), front end at its flexible pivot arm is mixed extension rod, the sheet integral type is changed drilling tool on extension rod is pre-installed again, start disassembling furnace machine, rely on the torque drive drill bit of flexible pivot arm to push ahead, tap hole is carried out enlarging, the tap hole that drilling need be changed.Because tap hole leaves and gathers cold steel, and tap hole generally adopts the anti-material of high-quality, so the wearing and tearing of sheet drilling tool are quite fast, although drilling tool cutting mouthful is with the bead-welding technology special, wear-resistant material of burn-oning, will bit change but bore an obstructed tap hole, replacement cost is quite high.1997, Baosteel is implemented production domesticization to the part producing spare part, the applicant begins to make interchangeable Tappinghole drilling bit, exactly the sheet integral type is changed drilling tool and resolve into " drill body " and " cutting element " (claiming blade again) two parts, make up in use after making respectively, make the blade that is contained on the drill body when using to a certain degree, can dismantle easily, change new blade, be beneficial to drill bit and work on, reduced replacement cost to a certain extent.But the replacing time does not but change, whole process still remained on about 2.5 hours, wherein the drill bit drilling time will be with 1.5 hours, if the cold steel of tap hole gathers too much or what run into that converter refines is variety steel, sometimes marquis's drill bit drilling time even will be with 3 hours, use nearly 20 pairs of blades (4/pay are used 3 pairs normally), whole replacing process will be with more than 4 hours.Not only replacement cost improves, and the more important thing is and has wasted the valuable steel-making time, has had a strong impact on the running order of enterprise; The molten iron that blast furnace is produced does not have the place to put, and the molten steel operation is then waited in the refining of postorder, electric furnace or steel rolling ..., cause that equipment can not get effective use, situation about holding up work for lack of material occurs repeatedly.Moreover, since the temperature of diamond bit that withdraws from the stove low have 600～700 ℃, high surpasses 1000 ℃, owing to be manual operations, concerning the operating personnel, its hazard level is well imagined when the tool changing sheet.In addition, after each drill bit withdraws from stove again during reaming, disassembling furnace machine is because the change of position needs aiming location again, all the quite a while will be expended at every turn, otherwise will make the hole of expanding S-shaped, can the fracture when serious extension rod of drill bit rear end make that the extension rod that disconnects is stuck in tap hole together with drill bit, even the accident that causes disassembling furnace machine to damage takes place.
Think that after having analyzed the steel tapping hole replacement operation process reduce drill bit and withdraw from number of times, be the key of improving the Tappinghole drilling bit technical feature work-ing life of improving drilling tool.Be that pendulum needs a problem solving in face of the science and technology personnel work-ing life of how to improve drilling tool.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of Tappinghole drilling bit, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention is by C :≤0.5%, and Cr:20-25%, Mo:1.8-2.2%, W:1.8-2.5%, Ni:1.2-1.5%, Ti:0.7-1.0% forms, and surplus is Fe.
Compared with prior art, the invention has the beneficial effects as follows: the drilling enlarging time only needs 5-12 minute/time, and the enlarging operation is once finished in drilling continuously, has saved production cost.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail:
Embodiment 1
C:0.5%, Cr:20%, Mo:1.8%, W:1.8%, Ni:1.2%, Ti:0.7%, surplus is Fe.
Embodiment 2
C:0.4%, Cr:22%, Mo:1.9%, W:1.9%, Ni:1.3%, Ti:0.8%, surplus is Fe.
Embodiment 3
C:0.3%, Cr:23%, Mo:2.0%, W:2.3%, Ni:1.4%, Ti:0.9%, surplus is Fe.
Embodiment 4
C:0.2%, Cr:24%, Mo:2.2%, W:2.4%, Ni:1.5%, Ti:1.0%, surplus is Fe.
Embodiment 5
C:0.1%, Cr:25%, Mo:2.2%, W:2.5%, Ni:1.5%, Ti:1.0%, surplus is Fe.
Manufacture method:
By above-mentioned material proportioning, adopt middle frequency furnace by smelting, make product shaping; Smelting temperature is 1680-1720 ℃; Manufacturing process adopts precision casting process, and forms the final cutting part of drill bit by thermal treatment; Drill body adopts the 20# steel of GB/T 699-1999 regulation, adopts the mechanical processing technique manufacturing to be shaped; Cutting part is installed in body keeps somewhere in the hole, form the finished product.
Effect comparison:
| Preface | Comparative run | Japonica type is changed utensil | The present invention | Remarks |
| 1 | Use equipment | Disassembling furnace machine | Disassembling furnace machine | Promptly more change planes |
| 2 | The drilling enlarging time | 90-120 minute/time | 5-12 minute/time | |
| 3 | Change the drilling tool number of times | Normal circumstances is changed 3 times " tap hole cutting elements " can finish enlarging, as runs into Special Circumstances and change " cutting element " and then nearly time can finish enlarging surplus in the of 10. | Need not change in any case, the enlarging operation is once finished in drilling continuously. | Special Circumstances refer to: what cold steel gathered or refined is variety steel |
| Preface | Comparative run | Japonica type is changed utensil | Our factory's research and development utensil | Remarks |
| 4 | The enlarging quality | Because will repeatedly withdrawing from, drilling tool changes " cutting element " that damages, so enlarging quality such as linearity and the aperture that needs can not get guaranteeing, it is big to cause grouting to seal workload. | Because drilling operation continuously, aperture and linearity are guaranteed, and easily grouting is sealed. | |
| 5 | Job safety | Since want manually constantly to change damaged have a 600-1000 ℃ of pyritous " cutting element ", in operation, the operating personnel is constituted a threat to, cause safety in production hidden danger. | Utensil is loaded onto disassembling furnace machine and is just no longer changed later under the normality condition, safety in production is effectively ensured. | |
| 6 | Direct use cost | 0.90 unit/ton steel | 0.50 unit/ton steel | All by RMB |
Can see through above-mentioned contrast: the maximum that adopts two kinds of replacing utensils to carry out operation is distinguished aspect three of drilling time, safety in production and priming costs.Single with regard to the priming cost aspect, every converter of steel mill can be saved the procurement payment of hundreds thousand of units every year, and the shortening of drilling time to the economic benefit that each steel mill produced be huge, can't estimate; Such as minimizing of the increase of the steel-making output that increases, plant factor, unnecessary equipment maintenance cost or the like.The raising of safety in production degree all is a desired good thing concerning each company and enterprise.
Claims (6)
1. Tappinghole drilling bit, by C :≤0.5%, Cr:20-25%, Mo:1.8-2.2%, W:1.8-2.5%, Ni:1.2-1.5%, Ti:0.7-1.0% forms, and surplus is Fe.
2. Tappinghole drilling bit according to claim 1, wherein: C:0.5%, Cr:20%, Mo:1.8%, W:1.8%, Ni:1.2%, Ti:0.7%, surplus is Fe.
3. Tappinghole drilling bit according to claim 1, wherein: C:0.4%, Cr:22%, Mo:1.9%, W:1.9%, Ni:1.3%, Ti:0.8%, surplus is Fe.
4. Tappinghole drilling bit according to claim 1, wherein: C:0.3%, Cr:23%, Mo:2.0%, W:2.3%, Ni:1.4%, Ti:0.9%, surplus is Fe.
5. Tappinghole drilling bit according to claim 1, wherein: C:0.2%, Cr:24%, Mo:2.2%, W:2.4%, Ni:1.5%, Ti:1.0%, surplus is Fe.
6. Tappinghole drilling bit according to claim 1, wherein: C:0.1%, Cr:25%, Mo:2.2%, W:2.5%, Ni:1.5%, Ti:1.0%, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025357 CN1851027A (en) | 2005-04-22 | 2005-04-22 | Tappinghole drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025357 CN1851027A (en) | 2005-04-22 | 2005-04-22 | Tappinghole drilling bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1851027A true CN1851027A (en) | 2006-10-25 |
Family
ID=37132529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510025357 Pending CN1851027A (en) | 2005-04-22 | 2005-04-22 | Tappinghole drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1851027A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820736A (en) * | 2014-01-09 | 2014-05-28 | 马鞍山市恒毅机械制造有限公司 | Alloy steel material for tap hole drilling bit and preparation method of alloy steel material |
| CN108486483A (en) * | 2018-06-21 | 2018-09-04 | 江苏沙钢集团淮钢特钢股份有限公司 | A kind of tricone bit gear wheel steel and its production method |
-
2005
- 2005-04-22 CN CN 200510025357 patent/CN1851027A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820736A (en) * | 2014-01-09 | 2014-05-28 | 马鞍山市恒毅机械制造有限公司 | Alloy steel material for tap hole drilling bit and preparation method of alloy steel material |
| CN108486483A (en) * | 2018-06-21 | 2018-09-04 | 江苏沙钢集团淮钢特钢股份有限公司 | A kind of tricone bit gear wheel steel and its production method |
| CN108486483B (en) * | 2018-06-21 | 2019-06-28 | 江苏利淮钢铁有限公司 | A kind of tricone bit gear wheel steel and its production method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |