EP1353765B1 - Drilling head - Google Patents
Drilling head Download PDFInfo
- Publication number
- EP1353765B1 EP1353765B1 EP01997366A EP01997366A EP1353765B1 EP 1353765 B1 EP1353765 B1 EP 1353765B1 EP 01997366 A EP01997366 A EP 01997366A EP 01997366 A EP01997366 A EP 01997366A EP 1353765 B1 EP1353765 B1 EP 1353765B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling head
- cutting
- head according
- ribs
- drill head
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims abstract description 70
- 230000007704 transition Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001295925 Gegenes Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
- E03F9/002—Cleaning sewer pipes by mechanical means
- E03F9/005—Apparatus for simultaneously pushing and rotating a cleaning device carried by the leading end of a cable or an assembly of rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
Definitions
- the invention relates to a drill head, in particular for insertion into Pipelines, with a rear connection piece and a front one diameter-larger cutting body, which is in the direction of advance has extending cutting ribs, the cutting ribs being convex are and at their radial end in the circumferential direction on both sides one Have cutting edge.
- Drilling heads of this type are used, for example, for drilling out deposits used in piping. To do this, the drill heads are surrounded by a spiral, a shaft or, alternatively, a flush-driven drilling motor in Rotation offset and advanced in the axial direction.
- Such a drill head is known from DE 2806725 C2.
- the known Drill head has machined in the body of the cutting body Cross slots, in each of the two blades drilling blades inserted are.
- the elongated shape which is only one, has a disadvantage limited cornering enabled.
- the drill head experiences only a slight guidance over those running parallel to the direction of advance Edges of the four drilling blades, so that there is one with strong incrustations Holding the drill head and damage at high driving forces the inner pipe wall can come.
- DE-PS 940460 discloses a method and an apparatus for Clean straight pipe sections from water pipes with one of one rigid rod carried scraper that inserted into the pipeline and is constantly pushed forward while rotating with the water flowing. Due to the rigid feed rod, the known scraper is not negotiate curves. Another disadvantage is the poor guidance of the doctor head via a scraper blade, which extends over the circumference of the scraper body on both sides protrudes and always abuts the pipe wall at two points of contact.
- FR 2 303 650 A1 Another state of the art is FR 2 303 650 A1, in which a Twist drill with a spherical head and a shank is described the spherical head being both cutting edges and one Centering tip has.
- the protected twist drill has the Disadvantage of an elongated, inflexible shape, so that a pipe-conserving use is not possible with bent drilling lines.
- FIGs 1 to 7 of the aforementioned document is a drill head shown, which also has a rear connector and a front Has larger diameter cutting body, as best shown in FIG 7 can be seen.
- the cutting body is in the direction of advance extending cutting ribs that, if only slightly, convex are trained. It also undercuts the Cutting edges disclosed at their radial end.
- the drill head is also not for cleaning that protects the pipe wall, especially bent pipes, suitable,
- the drill head advantageously has a tapering point in the direction of advance Cutting ribs on.
- the cutting body has a conical drill head tip.
- the conical drill head tip can protrude from the tips of the cutting ribs. This has the advantage that the boring head hits a cone-shaped deposit Drill head tip is fixed.
- a favorable geometry of the conical Drill head tip is at a flank angle of 40-50 °, in particular of 45 °.
- the cutting ribs are advantageously equidistant in the circumferential direction arranged. This ensures smooth running even at high speeds achieved.
- a recess is round in cross section. This Cross-sectional geometry of the recess is one possibility To design cutting ribs with an undercut.
- the connector and the Cutting body formed in one piece.
- the massive embodiment of the Drill head reduces the vibration in the cutting ribs and increases the Lifespan.
- the recess in the Milled cutting body This enables an inexpensive machine Mass production with small manufacturing tolerances.
- the axes of the recesses advantageously meet in one Intersection in front of the drill head.
- the one converging in the direction of advance Axes of the recesses ensure that the Cuttings, which increases the drilling progress and the wear of the Drill head is reduced.
- the total length L of the drill head is in Relationship to the outer diameter D ⁇ 1.2.
- a preferred embodiment has in the cylindrical connector in the Longitudinal axis of the drill head on a T-shaped recess. additionally can in the transition from the cylindrical connector to the cutting body two bores can be formed in the radial direction. These configurations are used to attach the drill head to a spiral, a shaft or a flush-driven drill motor.
- the drill head is shown in side view.
- the drill head 1 is composed of the connector 2 and the cutting body 3.
- a receptacle 10 for growing the Drill head 1 to a spiral, shaft or a drill motor (not shown).
- the attached drill head 1 can then by means of a through the hole 11 pushed bolt, which is not shown, are fixed.
- the connector 2 goes in one piece into the cutting body 3, the has a total of six cutting ribs 4, between which there are recesses 8 are located.
- the recesses 8 have a round shape in cross section. Due to the round cross section of the recesses 8, it occurs in the radial area of the cutting ribs 4 to an undercut 8a.
- the Axes 9 of the recesses 8 run in the direction of the drill head tips 7 towards each other and meet in a forward direction V in front of the tip intersection not shown.
- the cutting ribs 4 have a convex shape and give that Cutting body 3 has a spherical shape. In addition to the spherical shape, there are also oval ones Shapes possible, which is determined by the curvature of the cutting ribs 4 becomes. Overall, due to the convex design of the Cutting ribs a larger diameter than the connector.
- Each cutting rib 4 extends in the longitudinal direction of the drill head 1, i.e. in Direction of advance, and tapers both in the direction of connector 2 and also towards the drill head tip 7.
- the drill head tip 7 is set back from those lying in the longitudinal axis Y. Tips 6 of the outgoing cutting ribs 4 surrounded in a crown. In Figure 1 the tips 6 undercut at the flank angle ⁇ can be seen, which allow inverted cutting of the drill head 1.
- Arrangement, shape and orientation of the cutting edge 5 and recesses 8 enable a gentle cleaning of inner pipe walls, whereby the dissolved material is discharged through the recesses 8 to the rear.
- Fig. 2 the drill head 1 is shown in plan view, so that the round Cross section of the recesses 8 and the undercuts 8a Cutting edges 5 can be seen.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
- Drilling And Boring (AREA)
Abstract
Description
Die Erfindung betrifft einen Bohrkopf, insbesondere zum Einführen in Rohrleitungen, mit einem hinteren Anschußstück und einem vorderen durchmessergrößeren Schneidkörper, der sich in Vortriebsrichtung erstreckende Schneidrippen aufweist, wobei die Schneidrippen konvex gewölbt sind und an ihrem radialen Ende in Umfangsrichtung beidseitig jeweils eine Schneidkante aufweisen.The invention relates to a drill head, in particular for insertion into Pipelines, with a rear connection piece and a front one diameter-larger cutting body, which is in the direction of advance has extending cutting ribs, the cutting ribs being convex are and at their radial end in the circumferential direction on both sides one Have cutting edge.
Derartige Bohrköpfe werden beispielsweise zum Aufbohren von Ablagerungen in Rohrleitungen verwendet. Hierzu werden die Bohrköpfe von einer Spirale, einer Welle oder alternativ einem spülungsangetriebenen Bohrmotor in Drehung versetzt und in axialer Richtung vorgeschoben.Drilling heads of this type are used, for example, for drilling out deposits used in piping. To do this, the drill heads are surrounded by a spiral, a shaft or, alternatively, a flush-driven drilling motor in Rotation offset and advanced in the axial direction.
Ein derartiger Bohrkopf ist aus der DE 2806725 C2 bekannt. Der bekannte Bohrkopf besitzt im Grundkörper des Schneidkörpers eingearbeitete Kreuzschlitze, in die jeweils zwei Flügel aufweisende Bohrblätter eingesetzt sind. Nachteilig wirkt sich die langgestreckte Form aus, die nur eine beschränkte Kurvengängigkeit ermöglicht. Darüber hinaus erfährt der Bohrkopf eine nur geringe Führung über die parallel zur Vortriebsrichtung verlaufenden Kanten der vier Bohrblätter, so daß es bei starken Verkrustungen zu einem Festhalten des Bohrkopfes und bei hohen Vortriebskräften zu Beschädigungen der Rohrinnenwand kommen kann. Such a drill head is known from DE 2806725 C2. The known Drill head has machined in the body of the cutting body Cross slots, in each of the two blades drilling blades inserted are. The elongated shape, which is only one, has a disadvantage limited cornering enabled. In addition, the drill head experiences only a slight guidance over those running parallel to the direction of advance Edges of the four drilling blades, so that there is one with strong incrustations Holding the drill head and damage at high driving forces the inner pipe wall can come.
Die DE-PS 940460 offenbart ein Verfahren und eine Vorrichtung zum Reinigen gerader Rohrstücke von Wasserrohrleitungen mit einem von einer starren Stange getragenen Schaber, der in die Rohrleitung eingeführt und ständig unter Drehung bei entgegenströmenden Wasser vorgeschoben wird. Aufgrund der starren Vorschubstange ist der bekannte Schaber nicht kurvengängig. Weiterhin nachteilig ist die geringe Führung des Schaberkopfes über ein Schaberblatt, welches beidseitig über den Umfang des Schaberkörpers hervorragt und stets an zwei Berühungspunkten an der Rohrwandung anliegt.DE-PS 940460 discloses a method and an apparatus for Clean straight pipe sections from water pipes with one of one rigid rod carried scraper that inserted into the pipeline and is constantly pushed forward while rotating with the water flowing. Due to the rigid feed rod, the known scraper is not negotiate curves. Another disadvantage is the poor guidance of the doctor head via a scraper blade, which extends over the circumference of the scraper body on both sides protrudes and always abuts the pipe wall at two points of contact.
Einen weiteren Stnd der Technik bildet die FR 2 303 650 A1, in der ein Spiralbohrer mit einem kugelförmigen Kopf und einem Schaft beschrieben ist, wobei der kugelförmige Kopf sowohl Schneidkanten als auch eine Zentrierungsspitze aufweist. Der geschützte Spiralbohrer weist jedoch den Nachteil einer langgestreckten, unflexiblen Form auf, so daß ein rohrschonender Einsatz bei gebogenen Bohrleitungen nicht möglich ist.Another state of the art is FR 2 303 650 A1, in which a Twist drill with a spherical head and a shank is described the spherical head being both cutting edges and one Centering tip has. The protected twist drill has the Disadvantage of an elongated, inflexible shape, so that a pipe-conserving use is not possible with bent drilling lines.
Den nächsten Stand der Technik offenbart die US 1,296,078 A, in der ein Meißel für Festgestein mit einer auswechselbaren Schneide und einem Anschlußstück an eine Bohrstange beansprucht ist. Hierbei umfaßt das hintere Anschlußstück eine zungenförmige Ausnehmung und die auswechselbare Schneide einen komplementär ausgebildeten Vorsprung, wobei die Ausnehmung und der Vorsprung in Richtung der Längsachse des Meißels geneigt sind und sich dabei verjüngen. Dadurch wird erreicht, daß beim Bohrvorgang die Schneide in Richtung der Verjüngung gedrückt und somit fixiert wird. Zum Lösen der Schneide kann beispielsweise mit einem Hammer auf die Schneide entgegen der Verjüngungsrichtung geschlagen werden, so daß sich die Schneide löst und ausgewechselt werden kann.The next prior art is disclosed in US Pat. No. 1,296,078 A Chisel for hard rock with one interchangeable cutting edge and one Connector to a boring bar is claimed. Here the rear includes Connector a tongue-shaped recess and the interchangeable Cut a complementary projection, the Recess and the projection in the direction of the longitudinal axis of the chisel are inclined and rejuvenate. This ensures that the Drilling process pressed the cutting edge in the direction of the taper and thus is fixed. You can use a hammer, for example, to loosen the cutting edge be hit on the cutting edge against the direction of taper, so that the cutting edge comes loose and can be replaced.
In den Figuren 1 bis 7 der vorstehend genannten Druckschrift ist ein Bohrkopf dargestellt, der ebenfalls ein hinteres Anschlußstück und einen vorderen durchmessergrößeren Schneidkörper aufweist, wie am besten der Figur 7 zu entnehmen ist. Der Schneidkörper besitzt sich in Vortriebsrichtung erstreckende Schneidrippen, die, wenn auch nur geringfügig, konvex ausgebildet sind. Darüber hinaus wird eine Hinterschneidung der Schneidkanten an ihrem radialen Ende offenbart. Der vorstehend beschriebene Bohrkopf ist jedoch ebenfalls nicht für eine rohrwandschonende Reinigung, insbesondere gebogener Rohrleitungen, geeignet,In Figures 1 to 7 of the aforementioned document is a drill head shown, which also has a rear connector and a front Has larger diameter cutting body, as best shown in FIG 7 can be seen. The cutting body is in the direction of advance extending cutting ribs that, if only slightly, convex are trained. It also undercuts the Cutting edges disclosed at their radial end. The one described above However, the drill head is also not for cleaning that protects the pipe wall, especially bent pipes, suitable,
Es ist daher die Aufgabe der vorliegenden Erfindung einen Bohrkopf bereitzustellen, der einen optimierten Schneidfortschritt bei einer möglichst schonenden Bearbeitung der Rohrinnenwand auch gebogener Rohrleitungen ermöglicht.It is therefore the object of the present invention a drill head To provide an optimized cutting progress with a possible gentle processing of the inner pipe wall, including curved pipes allows.
Diese Aufgabe wird mit einem Bohrkopf gelöst, bei dem der Schneidkörper eine kegelförmige Bohrkopfspitze aufweist, die von in einer Längsachse Y zurückversetzt liegenden hinterschnittenen Spitzen der Schneidrippen umgeben ist. Aufgrund der konvex gerundeten Schneidrippen wird die Rohrwandung deutliche geringer belastet als bei bestehenden Systemen, da sich der Bohrkopf bei erhöhten Vortriebskräften, verursacht z.B. durch Abwinklungen der Rohrleitung und/oder den Rohrdurchmesser verkleinernde Ablagerungen, selbständig positionieren kann und mit einer Pendelkopf-Bewegung, fixiert durch die kegelförmige Bohrkopfspitze, in Vortriebsrichtung bewegt. Eine erhöhte Flächenpressung durch Verkanten des Bohrkopfes an der Rohrinnenwand wird dadurch vermieden. Die beidseitig der Schneidrippen befindlichen Schneidkanten ermöglichen einen effektiven Einsatz unabängig vom Drehsinn. Die Hinterschneidung der Schneidkanten ermöglicht ein Lösen auch fester Ablagerungen, da die Ablagerungen auf Zug beansprucht werden. Die Zugfestigkeit, insbesondere mineralische Ablagerungen, liegt ein Vielfaches unter der Druck- oder Scherfestigkeit.This task is solved with a drill head in which the cutting body has a conical drill head tip, which in a longitudinal axis Y recessed undercut tips surrounding the cutting ribs is. Due to the convexly rounded cutting ribs, the pipe wall significantly less stress than with existing systems because the drill head with increased propulsive forces, e.g. by bending the Pipeline and / or deposits reducing the pipe diameter, can position itself and fixed with a pendulum movement moved in the direction of advance by the conical drill head tip. A increased surface pressure by tilting the drill head on the This avoids the inside of the pipe. The two sides of the cutting ribs located cutting edges enable effective use independently from the sense of rotation. The undercut of the cutting edges enables them to be released also solid deposits, since the deposits are subjected to tension. The tensile strength, especially mineral deposits, lies Many times less than compressive or shear strength.
Aufgrund der vorstehend beschriebenen Ausgestaltung des Bohrkopfes beginnt sich der Bohrkopf bei wachsender Andruckkraft zu einer Seite zu neigen, wodurch die Spitzen der Schneidrippen mit der Ablagerung in Eingriff kommen und diese entfernen. Darüber hinaus schneiden aufgrund der kegelförmigen Ausgestaltung der Bohrkopfspitze die hinterschnittenen Spitzen der Schneidrippen invertiert und verringern somit die Gefahr von Rohrbeschädigungen.Due to the design of the drill head described above the drilling head tilts to one side as the contact pressure increases, whereby the tips of the cutting ribs engage the deposit come and remove this. In addition, cut due to the conical design of the drill head tip the undercut tips the cutting ribs invert and thus reduce the risk of Pipe damage.
Vorteilhafterweise weist der Bohrkopf in Vortriebsrichtung spitz zulaufende Schneidrippen auf.The drill head advantageously has a tapering point in the direction of advance Cutting ribs on.
In einer bevorzugten Ausführungsform weist der Schneidkörper eine kegelförmige Bohrkopfspitze auf. Die kegelförmige Bohrkopfspitze kann dabei gegenüber den Spitzen der Schneidrippen vorstehen. Dieses hat den Vorteil, daß der Bohrkopf bei Auftreffen auf eine Ablagerung über die kegelförmige Bohrkopfspitze fixiert ist. Eine günstige Geometrie der kegelförmigen Bohrkopfspitze wird bei einem Flankenwinkel von 40-50°, insbesondere von 45°, erreicht.In a preferred embodiment, the cutting body has a conical drill head tip. The conical drill head tip can protrude from the tips of the cutting ribs. This has the advantage that the boring head hits a cone-shaped deposit Drill head tip is fixed. A favorable geometry of the conical Drill head tip is at a flank angle of 40-50 °, in particular of 45 °.
Vorteilhafterweise sind die Schneidrippen in Umfangsrichtung äquidistant angeordnet. Hierdurch wird ein gleichmäßiger Lauf auch bei hohen Drehzahlen erzielt.The cutting ribs are advantageously equidistant in the circumferential direction arranged. This ensures smooth running even at high speeds achieved.
In einer günstigen Ausführungsform ist zwischen den Schneidrippen jeweils eine im Querschnitt runde Ausnehmung angeordnet. Diese Querschnittsgeometrie der Ausnehmung stellt eine Möglichkeit dar, die Schneidrippen mit einer Hinterschneidung auszugestalten.In a favorable embodiment is between the cutting ribs a recess is round in cross section. This Cross-sectional geometry of the recess is one possibility To design cutting ribs with an undercut.
Bei einer bevorzugten Ausführungsform sind das Anschlußstück und der Schneidkörper einstückig ausgebildet. Die massive Ausführungsform des Bohrkopfes reduziert die Schwingung in den Schneidrippen und erhöht die Lebensdauer. In a preferred embodiment, the connector and the Cutting body formed in one piece. The massive embodiment of the Drill head reduces the vibration in the cutting ribs and increases the Lifespan.
In einer vorteilhaften Ausführungsform ist die Ausnehmung in den Schneidkörper gefräst. Dieses ermöglicht eine kostengünstige maschinelle Massenherstellung bei geringen Fertigungstoleranzen.In an advantageous embodiment, the recess in the Milled cutting body. This enables an inexpensive machine Mass production with small manufacturing tolerances.
Vorteilhafterweise treffen sich die Achsen der Ausnehmungen in einem Schnittpunkt vor dem Bohrkopf. Die in Vortriebsrichtung zusammenlaufende Achsen der Ausnehmungen sorgen für einen günstigen Abtransport des Bohrkleins, wodurch der Bohrfortschritt erhöht und der Verschleiß des Bohrkopfes verringert wird.The axes of the recesses advantageously meet in one Intersection in front of the drill head. The one converging in the direction of advance Axes of the recesses ensure that the Cuttings, which increases the drilling progress and the wear of the Drill head is reduced.
In einer günstigen Ausführungsform ist die Gesamtlänge L des Bohrkopfes im Verhältnis zum Außendurchmesser D ≤ 1,2. Die kompakte Bauweise mit einem Außendurchmesser, der annähernd der Länge des Bohrkopfes entspricht, begünstigt die Kurvengängigkeit des Bohrkopfes.In a favorable embodiment, the total length L of the drill head is in Relationship to the outer diameter D ≤ 1.2. The compact design with an outer diameter that corresponds approximately to the length of the drill head, favors the cornering of the drill head.
Eine bevorzugte Ausführungsform weist im zylindrischen Anschlußstück in der Längsachse des Bohrkopfes eine T-förmige Ausnehmung auf. Zusätzlich können im Übergang vom zylindrischen Anschlußstück zum Schneidkörper zwei Bohrungen in radialer Richtung ausgebildet sein. Diese Ausgestaltungen dienen der Befestigung des Bohrkopfes an einer Spirale, einer Welle oder einem spülungsangetriebenen Bohrmotor.A preferred embodiment has in the cylindrical connector in the Longitudinal axis of the drill head on a T-shaped recess. additionally can in the transition from the cylindrical connector to the cutting body two bores can be formed in the radial direction. These configurations are used to attach the drill head to a spiral, a shaft or a flush-driven drill motor.
Anhand eines Ausführungsbeispiels soll die Erfindung näher beschrieben werden. Es zeigen die:
- Figur 1
- eine Seitenansicht des Bohrkopfes;
- Figur 2
- eine Draufsicht des in Figur 1 dargestellten Bohrkopfes gegen die Vortriebsrichtung.
- Figure 1
- a side view of the drill head;
- Figure 2
- a plan view of the drill head shown in Figure 1 against the direction of advance.
In Figur 1 ist der Bohrkopf in der Seitenansicht dargestellt. Der Bohrkopf 1
setzt sich aus dem Anschlußstück 2 und dem Schneidkörper 3 zusammen.In Figure 1, the drill head is shown in side view. The drill head 1
is composed of the connector 2 and the
In dem Anschlußstück 2 befindet sich eine Aufnahme 10 zum Anbau des
Bohrkopfes 1 an eine Spirale, Welle oder einen Bohrmotor (nicht dargestellt).
Der angebaute Bohrkopf 1 kann anschließend mittels eines durch die Bohrung
11 geschobenen Bolzens, der nicht eingezeichnet ist, fixiert werden.In the connector 2 is a
Das Anschlußstück 2 geht einstückig in den Schneidkörper 3 über, der
insgesamt sechs Schneidrippen 4 aufweist, zwischen denen sich Ausnehmungen
8 befinden. Die Ausnehmungen 8 besitzen im Querschnitt eine runde Form.
Aufgrund des rundlichen Querschnitts der Ausnehmungen 8 kommt es im
radialen Bereich der Schneidrippen 4 zu einer Hinterschneidung 8a. Die
Achsen 9 der Ausnehmungen 8 laufen in Richtung der Bohrkopfspitzen 7
aufeinander zu und treffen sich in einem in Vortriebsrichtung V vor der Spitze
befindlichen nicht eingezeichneten Schnittpunkt.The connector 2 goes in one piece into the cutting
Die Schneidrippen 4 besitzen eine konvexe Form und geben dem
Schneidkörper 3 eine kugelige Form. Außer der Kugelform sind auch ovale
Formen möglich, was durch die Krümmung der Schneidrippen 4 bestimmt
wird. Insgesamt besitzt der Bohrkopf durch die konvexe Ausführung der
Schneidrippen einen größeren Durchmesser als das Anschlußstück.The cutting ribs 4 have a convex shape and give that
Jede Schneidrippe 4 erstreckt sich in Längsrichtung des Bohrkopfes 1, d.h. in Vortriebsrichtung, und verjüngt sich sowohl in Richtung Anschlußstück 2 als auch in Richtung Bohrkopfspitze 7.Each cutting rib 4 extends in the longitudinal direction of the drill head 1, i.e. in Direction of advance, and tapers both in the direction of connector 2 and also towards the drill head tip 7.
Die Bohrkopfspitze 7 ist von den in der Längsachse Y zurückversetzt liegenden
Spitzen 6 der auslaufenden Schneidrippen 4 kronenförmig umgeben. In Figur 1
sind die unter dem Flankenwinkel α hinterschnittenen Spitzen 6 zu erkennen,
die ein invertiertes Schneiden des Bohrkopfes 1 ermöglichen. The drill head tip 7 is set back from those lying in the longitudinal axis Y.
Anordnung, Form und Ausrichtung der Schneidkante 5 und Ausnehmungen 8
ermöglichen eine schonende Reinigung von Rohrinnenwänden, wobei das
gelöste Material durch die Ausnehmungen 8 nach hinten abgeführt wird.Arrangement, shape and orientation of the
In der Fig. 2 ist der Bohrkopf 1 in Draufsicht dargestellt, so daß der runde
Querschnitt der Ausnehmungen 8 und die Hinterschneidungen 8a der
Schneidkanten 5 zu sehen ist. In Fig. 2 the drill head 1 is shown in plan view, so that the round
Cross section of the
- 11
- Bohrkopfwellhead
- 22
- Anschlußstückconnector
- 33
- Schneidkörpercutting body
- 44
- Schneidrippencutting ribs
- 55
- Schneidkantecutting edge
- 66
- Spitzetop
- 77
- Bohrkopfspitzedrill bit tip
- 88th
- Ausnehmungrecess
- 8a8a
- Hinterschneidungundercut
- 99
- Achsen der AusnehmungAxes of the recess
- 1010
- Aufnahmeadmission
- 1111
- Bohrungdrilling
- DD
- Außendurchmesserouter diameter
- LL
- Gesamtlängeoverall length
- VV
- Vortriebsrichtungdrive direction
- YY
- Längsachselongitudinal axis
- αα
- Flankenwinkelflank angle
Claims (13)
- Drilling head (1), in particular for introducing into pipelines, with a rear connection piece (2) and a front cutting body (3) which has a greater diameter and comprises cutting ribs (4) extending in the advance direction V, wherein the cutting ribs (4) are arched in convex fashion and in each case comprise a cutting edge (5) on both sides at their radial end in the circumferential direction,
characterised in that the cutting body (3) comprises a conical drilling head point (7) which is surrounded by undercut points (6), set back in a longitudinal plane Y, of the cutting ribs (4). - Drilling head according to Claim 1, characterised in that the cutting edge (5) is provided with an undercut (8a).
- Drilling head according to Claim 1, characterised in that the cutting ribs (4) taper in the advance direction (V).
- Drilling head according to any one of Claims 1 to 3, characterised in that the conical drilling head point (7) protrudes with respect to the points (6) of the cutting ribs (4).
- Drilling head according to any one of Claims 1 to 4, characterised in that the conical drilling head point (7) has a flank angle (α) of 40°-50°.
- Drilling head according to any one of Claims 1 to 5, characterised in that the cutting ribs (4) are disposed equidistantly in the circumferential direction.
- Drilling head according to any one of Claims 1 to 6, characterised in that a respective recess (8) with a round cross section is disposed between the cutting ribs (4).
- Drilling head according to any one of Claims 1 to 7, characterised in that the connection piece (2) and the cutting body (3) are formed in one piece.
- Drilling head according to Claim 7 or 8, characterised in that the recess (8) is milled.
- Drilling head according to any one of Claims 7 to 9, characterised in that the axes (9) of the recesses (8) meet at a point of intersection in front of the drilling head (1).
- Drilling head according to any one of Claims 1 to 10, characterised in that the ratio of the total length L of the drilling head (1) to the outside diameter D is ≤ 1.2.
- Drilling head according to any one of Claims 1 to 11, characterised in that a T-shaped receptacle (10) is formed in the connection piece (2) along the longitudinal axis (Y) of the drilling head (1).
- Drilling head according to any one of Claims 1 to 12, characterised in that two bores (11) are formed in the radial direction at the transition from the cylindrical connection piece (2) to the cutting body (3).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10057877A DE10057877C2 (en) | 2000-11-22 | 2000-11-22 | wellhead |
| DE10057877 | 2000-11-22 | ||
| PCT/EP2001/013612 WO2002042014A1 (en) | 2000-11-22 | 2001-11-22 | Drilling head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1353765A1 EP1353765A1 (en) | 2003-10-22 |
| EP1353765B1 true EP1353765B1 (en) | 2004-11-03 |
Family
ID=7664204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01997366A Expired - Lifetime EP1353765B1 (en) | 2000-11-22 | 2001-11-22 | Drilling head |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6932170B2 (en) |
| EP (1) | EP1353765B1 (en) |
| AT (1) | ATE281250T1 (en) |
| DE (2) | DE10057877C2 (en) |
| WO (1) | WO2002042014A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH702888B1 (en) | 2010-03-17 | 2014-12-15 | Josef Haas | Cutting head especially for cleaning of pipelines. |
| ITCO20120044A1 (en) * | 2012-09-20 | 2014-03-21 | Nuovo Pignone Srl | CUTTER AND METHOD OF USE |
| CN104088359B (en) * | 2014-06-07 | 2015-12-09 | 冯政 | The method of manufacture and use thereof that blow-off line desilting is bored |
| DE202019000798U1 (en) | 2019-02-19 | 2019-03-14 | Stefan Pfister | Hemisphere milling cutter for pipe cleaning spirals |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US616118A (en) * | 1898-12-20 | Ernest kuhne | ||
| NL29183C (en) * | ||||
| DE89038C (en) * | 1895-03-09 | 1896-10-24 | Gebr Commichau | PIPE CLEANER |
| FR357403A (en) * | 1905-08-12 | 1905-12-27 | Tiefbohr Maschinen & Werkzeuge | Double eccentric drill bit for drilling |
| US946060A (en) * | 1908-10-10 | 1910-01-11 | David W Looker | Post-hole auger. |
| US1116154A (en) * | 1913-03-26 | 1914-11-03 | William G Stowers | Post-hole digger. |
| US1296078A (en) * | 1918-11-20 | 1919-03-04 | Arthur L Hawkesworth | Drill. |
| US1387733A (en) * | 1921-02-15 | 1921-08-16 | Penelton G Midgett | Well-drilling bit |
| US1746423A (en) * | 1925-09-30 | 1930-02-11 | Hartman William Walter | Well-drilling bit |
| GB646872A (en) * | 1947-07-12 | 1950-11-29 | Timken Roller Bearing Co | Improvements in or relating to rotary percussion drills and processes of making the same |
| GB634743A (en) * | 1947-07-28 | 1950-03-29 | Murex Ltd | Improvements in and relating to drills |
| GB644145A (en) * | 1947-12-09 | 1950-10-04 | Atlas Diesel Ab | Improvements in drill bits for hammer drills having hard metal cutting edges and hard metal bodies forming such cutting edges |
| DE940460C (en) * | 1949-11-17 | 1956-03-15 | Willy Uhlig | Method and device for cleaning water pipes |
| DE1634487A1 (en) * | 1966-12-06 | 1970-10-01 | Masch Und Bohrgeraete Fabrik | Drilling device for the production of slot holes |
| US3557887A (en) * | 1967-09-19 | 1971-01-26 | Watson Mfg Co | Auger-type pilot bit |
| NL6804149A (en) * | 1968-03-22 | 1969-09-24 | ||
| DE7507903U (en) * | 1975-03-13 | 1976-10-07 | Fischer, Artur, 7244 Waldachtal | STONE DRILLS |
| DE2806725C2 (en) * | 1978-02-17 | 1986-12-11 | Horst 6000 Frankfurt Klünder | Cross blade drill for insertion into pipelines |
| SU1137161A1 (en) * | 1983-05-16 | 1985-01-30 | Институт Горного Дела Со Ан Ссср | Apparatus for driving holes in earth |
| DE4318759A1 (en) * | 1993-06-05 | 1994-12-08 | Alexander Dipl In Muehlhaeuser | Device for cleaning pipes |
| DE9400460U1 (en) * | 1994-01-10 | 1994-03-03 | Zillmann, Bruno, 12623 Berlin | Extendable sun visor on motor vehicles |
| AT405308B (en) * | 1997-04-16 | 1999-07-26 | Matlschweiger Peter | METHOD AND DEVICE FOR CLEANING A PIPELINE WITH DROP PIPE |
-
2000
- 2000-11-22 DE DE10057877A patent/DE10057877C2/en not_active Expired - Fee Related
-
2001
- 2001-11-22 EP EP01997366A patent/EP1353765B1/en not_active Expired - Lifetime
- 2001-11-22 AT AT01997366T patent/ATE281250T1/en active
- 2001-11-22 WO PCT/EP2001/013612 patent/WO2002042014A1/en active IP Right Grant
- 2001-11-22 US US10/432,311 patent/US6932170B2/en not_active Expired - Lifetime
- 2001-11-22 DE DE50104442T patent/DE50104442D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002042014A1 (en) | 2002-05-30 |
| US6932170B2 (en) | 2005-08-23 |
| EP1353765A1 (en) | 2003-10-22 |
| US20040084221A1 (en) | 2004-05-06 |
| DE10057877C2 (en) | 2002-10-17 |
| DE10057877A1 (en) | 2002-05-29 |
| DE50104442D1 (en) | 2004-12-09 |
| ATE281250T1 (en) | 2004-11-15 |
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