EP1057968B1 - Verfahren zum Erzeugen einer Spitze an einem Ankerstab aus Stahl - Google Patents
Verfahren zum Erzeugen einer Spitze an einem Ankerstab aus Stahl Download PDFInfo
- Publication number
- EP1057968B1 EP1057968B1 EP00108514A EP00108514A EP1057968B1 EP 1057968 B1 EP1057968 B1 EP 1057968B1 EP 00108514 A EP00108514 A EP 00108514A EP 00108514 A EP00108514 A EP 00108514A EP 1057968 B1 EP1057968 B1 EP 1057968B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tip
- heating
- steel rod
- heated
- rod
- 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.)
- Expired - Lifetime
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
Definitions
- the invention relates to a method for generating a tip on a Steel anchor rod for mining and tunneling according to the generic term of Claim 1.
- Anchor used in mining and tunneling.
- Anchor rods made of steel, which in a borehole is inserted and hardened by expansion devices Materials or the like can be fixed.
- Resin adhesive anchors these are anchors, their anchor rods in the borehole through quickly hardening synthetic resin adhesive anchored and after the adhesive takes effect be excited.
- Resin adhesive anchor To produce such a synthetic resin adhesive anchor is in the borehole inserted a cartridge, the two in closed containers Contains components of a synthetic resin adhesive. Then in this adhesive cartridge the anchor rod is inserted while rotating. The Chambers of the cartridge opened, the components of the adhesive mixed and thereby activated.
- To insert such an anchor rod more easily into a borehole To be able to, it is usually provided with a tip at the end of the borehole must be retrofitted.
- Such a tip can also be symmetrical on both sides, i.e. wedge-shaped according to Art a flat chisel or be conical. This allows the Danger of lateral deflection of the rod tip when driving in the Anchor rod can be met, but there remains the time and cost for the Generation of the tip.
- the object of the invention is a method to manufacture a tip on an anchor rod for mining and tunneling Specify generic type, according to which a central tip simpler, especially more economical way to produce.
- this is with tensile loading of steel bars until breakage constriction occurring for the generation of a tip on an anchor rod exploited and not only by simultaneous local application of heat spatially defined, but also equalized.
- the steel gets there Place to flow; there is a constriction until breakage, which leads to tips of both sections of the steel rod are formed. It is only required that the steel rod be warm at the time the pulling force is applied have to be; whether the heating was applied before the pulling force was applied or the steel rod is heated during the action of the tensile force, does not play Role.
- the shape of the peaks formed during the break can be determined by the intensity of the Heat treatment can be influenced. Depending on the intensity of the heat treatment there is a short, compact or a longer, slender tip; the higher the Warming, the longer the tip gets.
- the mechanical effort for performing the method according to the invention is low. It is irrelevant whether the steel rod is pulled first and then warmed, first warmed and then pulled or pulled and simultaneously is heated.
- the Length of the steel rod punctually initiated a heat treatment, which in simplest case by means of a flame, but also by electrical means Induction or by means of ohmic resistance heating. To a relatively short time there is a constriction until the break.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Forging (AREA)
- Joining Of Building Structures In Genera (AREA)
Description
Claims (7)
- Verfahren zum Erzeugen einer Spitze an einem Ankerstab aus Stahl für den Berg- und Tunnelbau, wobei ein Stahlstab getrennt und die Spitze an der Trennstelle ausgebildet wird, dadurch gekennzeichnet, dass der Stahlstab an einer vorbestimmten Stelle seiner Länge erwärmt wird und in erwärmtem Zustand einer axialen Zugkraft bis zum Bruch infolge Einschnürung ausgesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Stahlstab zuerst erwärmt und danach einer Zugkraft ausgesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Stahlstab zugleich erwärmt und einer Zugkraft ausgesetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Stahlstab zum Erzeugen der Zugkraft in eine Spannvorrichtung eingespannt wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Erwärmung mittels einer Flamme erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Erwärmung mittels Induktion erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Erwärmung mittels Ohmscher Widerstandserwärmung erfolgt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK00108514T DK1057968T3 (da) | 1999-06-01 | 2000-04-19 | Fremgangsmåde til fremstilling af en spids på en ankerbolt af stål |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19925109A DE19925109C1 (de) | 1999-06-01 | 1999-06-01 | Verfahren zum Erzeugen einer Spitze an einem Ankerstab aus Stahl |
| DE19925109 | 1999-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1057968A1 EP1057968A1 (de) | 2000-12-06 |
| EP1057968B1 true EP1057968B1 (de) | 2004-09-22 |
Family
ID=7909898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00108514A Expired - Lifetime EP1057968B1 (de) | 1999-06-01 | 2000-04-19 | Verfahren zum Erzeugen einer Spitze an einem Ankerstab aus Stahl |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1057968B1 (de) |
| AT (1) | ATE277274T1 (de) |
| DE (2) | DE19925109C1 (de) |
| DK (1) | DK1057968T3 (de) |
| ES (1) | ES2226638T3 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226408A (zh) * | 2011-06-21 | 2011-10-26 | 北京交通大学 | 一种黄土隧道锚杆支护装置 |
| CN102345460A (zh) * | 2011-06-21 | 2012-02-08 | 北京交通大学 | 一种浅埋大断面黄土隧道沉降控制方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3478640A (en) * | 1968-02-19 | 1969-11-18 | Elders G W | Roof bolt connection |
| FR1590097A (de) * | 1968-03-05 | 1970-04-13 | ||
| GB1271374A (en) * | 1969-02-18 | 1972-04-19 | Ici Ltd | Improvements relating to anchor bolts and methods of installing same |
| US3942329A (en) * | 1975-02-11 | 1976-03-09 | The United States Of America As Represented By The Secretary Of The Interior | Flexible rock bolt |
| US4068481A (en) * | 1977-05-05 | 1978-01-17 | Chevron Research Company | Self-retaining roof bolt |
| US4247224A (en) * | 1978-12-14 | 1981-01-27 | Ppg Industries, Inc. | Method for installing a mine roof bolt |
| US4842818A (en) * | 1980-03-17 | 1989-06-27 | Daido Tokushuko Kabushiki Kaisha | Method for manufacturing tapered rods |
| DE3417251C1 (de) * | 1984-05-10 | 1985-07-18 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zum Aufbringen von Haftstrecken an Gebirgsankern |
| DE3417252C1 (de) | 1984-05-10 | 1986-04-17 | Bergwerksverband Gmbh, 4300 Essen | Kombinierter starrer Profil- und Dehnanker |
| US4649729A (en) * | 1985-01-14 | 1987-03-17 | Florida Steel Corporation | Method for manufacturing steel bar with intermittent smooth surface and patterned relief segments, and mine roof bolt product |
| DE3629365A1 (de) * | 1986-08-29 | 1988-03-03 | Hausherr & Soehne Rudolf | Flexibler gebirgsanker |
| DE3713291A1 (de) * | 1987-04-18 | 1988-11-03 | Dyckerhoff & Widmann Ag | Gebirgsanker zur sicherung von strecken und raeumen im berg- und tunnelbau |
| US5531545A (en) * | 1995-05-11 | 1996-07-02 | Seegmiller; Ben L. | Cable bolt structure and method |
-
1999
- 1999-06-01 DE DE19925109A patent/DE19925109C1/de not_active Expired - Fee Related
-
2000
- 2000-04-19 AT AT00108514T patent/ATE277274T1/de not_active IP Right Cessation
- 2000-04-19 ES ES00108514T patent/ES2226638T3/es not_active Expired - Lifetime
- 2000-04-19 EP EP00108514A patent/EP1057968B1/de not_active Expired - Lifetime
- 2000-04-19 DK DK00108514T patent/DK1057968T3/da active
- 2000-04-19 DE DE50007843T patent/DE50007843D1/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2226638T3 (es) | 2005-04-01 |
| ATE277274T1 (de) | 2004-10-15 |
| EP1057968A1 (de) | 2000-12-06 |
| DK1057968T3 (da) | 2005-01-17 |
| DE19925109C1 (de) | 2000-06-21 |
| DE50007843D1 (de) | 2004-10-28 |
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