EP0344117B1 - Method and apparatus for rolling grooves in tool shanks - Google Patents
Method and apparatus for rolling grooves in tool shanks Download PDFInfo
- Publication number
- EP0344117B1 EP0344117B1 EP89810372A EP89810372A EP0344117B1 EP 0344117 B1 EP0344117 B1 EP 0344117B1 EP 89810372 A EP89810372 A EP 89810372A EP 89810372 A EP89810372 A EP 89810372A EP 0344117 B1 EP0344117 B1 EP 0344117B1
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- EP
- European Patent Office
- Prior art keywords
- grooves
- segments
- insertion end
- axis
- shank end
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K5/00—Making tools or tool parts, e.g. pliers
- B21K5/02—Making tools or tool parts, e.g. pliers drilling-tools or other for making or working on holes
- B21K5/10—Forming drill-bit shanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
- B21H7/187—Rolling helical or rectilinear grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/54—Making machine elements bolts, studs, or the like with grooves or notches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
Definitions
- the invention relates to a forming process for the production of grooves in the insertion ends of drilling and chiseling tools, wherein at least two grooves are rolled into their full depth in the insertion end of the tools at the same time by means of a number of segments corresponding to the number of grooves in a single pass, the Each segment rotates about an axis that lies in a plane perpendicular to the axis of the insertion end and there is a relative movement between the insertion end and the axes of the segments parallel to the axis of the insertion end.
- Tools of the aforementioned type are known for example from DE-C-2 551 125 and are used in particular for stone processing.
- the tools are inserted into a receptacle of a drive device, this receptacle having fixed or radially disengageable locking elements which engage in a form-fitting manner in the grooves of the insertion end of the tools. Torque can be transmitted to the tool via these locking elements and the tool can be prevented from being ejected from the receptacle.
- the form-fitting holder in the receptacle grooves of the insertion end can be produced in different ways.
- This machining production has the disadvantages known per se, such as a high expenditure of time and unfavorable influencing of the material by interrupting the fiber course.
- the further known embossing method according to DE-A-3 015 893 was also not able to completely eliminate the disadvantages, in particular with regard to the expenditure of time.
- due to the high forces occurring in this forming process a relatively large expenditure on equipment is required.
- DE-A-2 065 191 discloses a device for pressing control slots into the wall of a pre-machined slide core.
- segments are provided for pressing in the control slots, which can be pivoted about an axis perpendicular to the axis of the slide core.
- a relative movement takes place between the push-in segments and the slide core parallel to the axis of the slide core.
- the invention has for its object to provide a forming process that enables simple and efficient production of the grooves in the insertion ends of drilling and chiseling tools without the material flowing in the axial direction of the insertion end.
- the grooves are continuously produced when the segments are being rolled, which on the one hand requires smaller forming forces compared to a pure stamping process and on the other hand enables the material to flow better.
- This flow of the material results in a favorable fiber orientation of the material in the area of the insertion end.
- the rolling of the grooves can be done from the free end of the insertion end or from the opposite end, ie directly to the full.
- the grooves are rolled to full depth in one pass. This rolling of the grooves to the full depth is made possible in particular by the continuous shaping of the material and the lower power requirement compared to a pure stamping process. Rolling the grooves in one pass enables efficient production and a high surface quality in the area of the longitudinal grooves.
- the grooves can have a longitudinal extent extending in the longitudinal direction or in the circumferential direction of the insertion end.
- grooves are rolled in at the same time during the production of the insertion end. If several symmetrically arranged grooves are rolled in at the same time, the lateral forces generated during rolling can be compensated for. If all grooves are rolled in at the same time, subsequent changes in cross-section of the grooves that have already been produced can be avoided. From the point of view of the arrangement of the grooves, there are no limits to the method. For example, two grooves can be diametrically opposed to one another, or three symmetrically distributed grooves can be provided. Instead of individual axial grooves, entire groups of, for example, grooves arranged axially one behind the other can also be rolled into the insertion end.
- a device known from DE-A-2 065 191 which is suitable for rolling at least two grooves into the insertion end of drilling and chiseling tools by means of segments, each segment being about an axis which is perpendicular to the axis of the insertion end Is level, rotatably mounted lever is arranged and between the insertion end and axes of the lever, a relative movement parallel to the axis of the insertion end can be characterized according to the invention in that the segments have a counter-profile, which allows the material to flow in the axial direction of the insertion end during rolling prevented. When the segments are pivoted about the axis which is essentially perpendicular to the axial direction of the insertion end, the segments roll in the axial direction at the insertion end.
- the relative movement between the segments and the insertion end can be brought about by axially displacing the axis of the segments or by a feed movement of the insertion end.
- the segments are arranged on rotatably mounted levers, which can be done for example by a releasable connection. This provides the opportunity to replace the segments after they have worn out.
- the levers are preferably designed with two arms with an actuating arm projecting away from the segment.
- the counter-profiling with stop surfaces acting essentially in the axial direction creates a kind of momentary positive locking during the rolling process between the segment and the insertion end, which prevents the material from flowing in the axial direction of the insertion end. This forces the material to flow sufficiently in the radial direction.
- a working cylinder is advantageously provided for rotating the lever.
- the working cylinder can be operated for example by means of compressed air or expediently by means of a hydraulic fluid. Since relatively high forces are necessary with a relatively short distance, hydraulically operated cylinders are particularly suitable as working cylinders, which also enable good synchronization of several cylinders to be actuated simultaneously.
- the device shown in FIGS. 1 to 4 for producing an insertion end 1 has segments 2 which are arranged on a lever 3.
- the lever 3 is rotatably mounted about an axis 4 which is substantially perpendicular to the axial direction of the insertion end 1.
- the levers 3 have two arms and are connected to a push rod 6 at the end opposite the segments 2 by means of bolts 5.
- the push rod 6 is connected via a ball head 6a to an annular piston 7 which is displaceable in a working cylinder 8 in the axial direction of the insertion end 1.
- the ring piston 7 is displaced by means of a hydraulic fluid 9, which is supplied to the working cylinder 8 via a connecting piece 10.
- the insertion end 1 is fed between the segments 2. Due to the symmetrical arrangement of the segments 2, the insertion end 1 is centered at the same time.
- the annular piston 7 is now moved into the end position shown in FIG. 2.
- the segments 2 connected to the levers 3 roll in the axial direction at the insertion end 1 and roll grooves 1a into the surface of the insertion end 1.
- the levers 3 are rotated about the axis 4 by the annular piston 7 via the push rod 6.
- the insertion end 1 is released and the levers 3 can be rotated back into the starting position shown in FIG. 1 by the annular piston 7.
- the device is in turn ready for the production of the grooves 1a at a further insertion end 1.
- a total of four segments 2 connected to levers 3 are arranged over the circumference of the insertion end 1.
- the levers 3 are connected to consoles 11 via the axes 4.
- the brackets 11 are attached to a face plate 12, not shown in FIGS. 1 and 2. Instead of four brackets 11, however, two, three or six brackets 11 can also be arranged on the face plate 12.
- the insertion end 1 is surrounded by the segments 2 over the entire circumference. This ensures that a precise cross section of the insertion end 1 is achieved when rolling the grooves 1a.
- the grooves 1a on the groove base are provided with a profile 1b which has stop surfaces 1c which act essentially in the axial direction.
- the profiling 1b is rolled into the surface of the insertion end 1 simultaneously with the grooves 1a by the segments 2 arranged on the lever 3.
- the segments 2 are provided with a counter-profile 2a corresponding to the profile 1b.
- the profiling 1b prevents an excessive change in length of the insertion end when rolling the grooves 1a and thereby enables the formation of an angular profile of the insertion end 1. A cross-sectional change resulting from the change in length of the insertion end 1 is thereby avoided.
Abstract
Description
Die Erfindung betrifft ein Umformungsverfahren zur Herstellung von Nuten in Einsteckenden von Bohr- und Meisselwerkzeugen, wobei in das Einsteckende der Werkzeuge wenigstens zwei Nuten in ihrer vollen Tiefe mittels einer der Anzahl von Nuten entsprechenden Anzahl von Segmenten in einem einzigen Durchgang gleichzeitig eingewalzt werden, wobei die Segmente sich je um eine Achse, die in einer senkrecht zur Achse des Einsteckendes stehenden Ebene liegt, verdrehen und zwischen Einsteckende und Achsen der Segmente parallel zur Achse des Einsteckendes eine Relativbewegung erfolgt.The invention relates to a forming process for the production of grooves in the insertion ends of drilling and chiseling tools, wherein at least two grooves are rolled into their full depth in the insertion end of the tools at the same time by means of a number of segments corresponding to the number of grooves in a single pass, the Each segment rotates about an axis that lies in a plane perpendicular to the axis of the insertion end and there is a relative movement between the insertion end and the axes of the segments parallel to the axis of the insertion end.
Werkzeuge der vorgenannten Art sind beispielsweise aus der DE-C-2 551 125 bekannt und werden insbesondere für die Gesteinsbearbeitung verwendet. Zu diesem Zweck werden die Werkzeuge in eine Aufnahme eines Antriebsgerätes eingesetzt, wobei diese Aufnahme feststehende oder radial ausrückbare Verriegelungselemente aufweist, die formschlüssig in die Nuten des Einsteckendes der Werkzeuge eingreifen. Ueber diese Verriegelungselemente kann einerseits ein Drehmoment auf das Werkzeug übertragen und andererseits ein Herausstossen des Werkzeuges aus der Aufnahme verhindert werden.Tools of the aforementioned type are known for example from DE-C-2 551 125 and are used in particular for stone processing. For this purpose, the tools are inserted into a receptacle of a drive device, this receptacle having fixed or radially disengageable locking elements which engage in a form-fitting manner in the grooves of the insertion end of the tools. Torque can be transmitted to the tool via these locking elements and the tool can be prevented from being ejected from the receptacle.
Die genannten, der formschlüssigen Halterung in der Aufnahme dienenden Nuten des Einsteckendes sind auf verschiedene Arten herstellbar. So ist es beispielsweise bekannt, die Nuten spanabhebend herzustellen. Diese spanabhebende Herstellung weist die an sich bekannten Nachteile, wie hoher Zeitaufwand und ungünstige Beeinflussung des Werkstoffes durch Unterbrechung des Faserverlaufes auf. Das weiterhin bekannte Prägeverfahren entsprechend DE-A-3 015 893 konnte die Nachteile insbesondere hinsichtlich Zeitaufwand ebenfalls nicht vollumfänglich beseitigen. Darüber hinaus ist aufgrund der bei diesem Umformungsverfahren auftretenden hohen Kräfte ein relativ grosser apparativer Aufwand erforderlich.The above-mentioned, the form-fitting holder in the receptacle grooves of the insertion end can be produced in different ways. For example, it is known to produce the grooves by machining. This machining production has the disadvantages known per se, such as a high expenditure of time and unfavorable influencing of the material by interrupting the fiber course. The further known embossing method according to DE-A-3 015 893 was also not able to completely eliminate the disadvantages, in particular with regard to the expenditure of time. In addition, due to the high forces occurring in this forming process, a relatively large expenditure on equipment is required.
Aus der DE-A-2 065 191 ist eine Vorrichtung zum Eindrücken von Steuerschlitzen in die Wand eines vorgearbeiteten Schieberkerns bekannt. Bei dieser Vorrichtung sind zum Eindrücken der Steuerschlitze Segmente vorgesehen, welche um eine senkrecht zur Achse des Schieberkerns stehende Achse schwenkbar sind. Während des Eindrückvorganges findet zwischen den dem Eindrücken dienenden Segmenten und dem Schieberkern eine Relativbewegung parallel zur Achse des Schieberkerns statt.DE-A-2 065 191 discloses a device for pressing control slots into the wall of a pre-machined slide core. In this device, segments are provided for pressing in the control slots, which can be pivoted about an axis perpendicular to the axis of the slide core. During the push-in process, a relative movement takes place between the push-in segments and the slide core parallel to the axis of the slide core.
Der Erfindung liegt die Aufgabe zugrunde, eine Umformungsverfahren zu schaffen, das eine einfache und rationelle Herstellung der Nuten in Einsteckenden von Bohr- und Meisselwerkzeugen ermöglicht, ohne dass ein Fliessen des Werkstoffes in Achsrichtung des Einsteckendes erfolgt.The invention has for its object to provide a forming process that enables simple and efficient production of the grooves in the insertion ends of drilling and chiseling tools without the material flowing in the axial direction of the insertion end.
Erfindungsgemäss wird dies durch die Merkmale des Anspruchs 1 erreicht.According to the invention, this is achieved by the features of
Durch das erfindungsgemässe Verfahren werden die Nuten beim Abwälzen der Segmente kontinuierlich hergestellt, was gegenüber einem reinen Prägevorgang einerseits kleinerer Umformkräfte bedarf und andererseits ein besseres Fliessen des Werkstoffes ermöglicht. Dieses Fliessen des Werkstoffes ergibt einen günstigen Faserverlauf des Werkstoffes im Bereich des Einsteckendes. Das Walzen der Nuten kann vom freien Ende des Einsteckendes oder vom entgegengesetzten Ende her, dh direkt ins volle erfolgen.By means of the method according to the invention, the grooves are continuously produced when the segments are being rolled, which on the one hand requires smaller forming forces compared to a pure stamping process and on the other hand enables the material to flow better. This flow of the material results in a favorable fiber orientation of the material in the area of the insertion end. The rolling of the grooves can be done from the free end of the insertion end or from the opposite end, ie directly to the full.
Die Nuten werden in einem Durchgang auf die volle Tiefe eingewalzt. Dieses Einwalzen der Nuten auf die volle Tiefe wird insbesondere durch die kontinuierliche Umformung des Werkstoffes und den gegenüber einem reinen Prägevorgang geringeren Kraftbedarf ermöglicht. Das Einwalzen der Nuten in einem Durchgang ermöglicht eine rationelle Fertigung und eine hohe Oberflächengüte im Bereich der Längsnuten. Die Nuten können eine in Längsrichtung oder in Umfangsrichtung des Einsteckendes verlaufende Längserstreckung aufweisen.The grooves are rolled to full depth in one pass. This rolling of the grooves to the full depth is made possible in particular by the continuous shaping of the material and the lower power requirement compared to a pure stamping process. Rolling the grooves in one pass enables efficient production and a high surface quality in the area of the longitudinal grooves. The grooves can have a longitudinal extent extending in the longitudinal direction or in the circumferential direction of the insertion end.
Bei der Herstellung des Einsteckendes werden mehrere Nuten gleichzeitig eingewalzt. Bei einem gleichzeitigen Einwalzen mehrerer symmetrisch angeordneter Nuten können die beim Walzen entstehenden seitlichen Kräfte ausgeglichen werden. Werden alle Nuten gleichzeitig eingewalzt, so können nachträgliche Querschnittsveränderungen der bereits hergestellten Nuten vermieden werden. Aus der Sicht der Anordnung der Nuten sind dem Verfahren keine Grenzen gesetzt. So können beispielsweise zwei Nuten einander diametral gegenüberliegen oder es können drei symmetrisch verteilt angeordnete Nuten vorgesehen sein. Anstelle von einzelnen axialen Nuten können auch ganze Gruppen von beispielsweise axial hintereinander angeordneten Nuten in das Einsteckende eingewalzt werden.Several grooves are rolled in at the same time during the production of the insertion end. If several symmetrically arranged grooves are rolled in at the same time, the lateral forces generated during rolling can be compensated for. If all grooves are rolled in at the same time, subsequent changes in cross-section of the grooves that have already been produced can be avoided. From the point of view of the arrangement of the grooves, there are no limits to the method. For example, two grooves can be diametrically opposed to one another, or three symmetrically distributed grooves can be provided. Instead of individual axial grooves, entire groups of, for example, grooves arranged axially one behind the other can also be rolled into the insertion end.
Es hat sich gezeigt, dass bei der Anordnung von relativ vielen, über den Umfang verteilten Nuten auch eine Längenänderung des Einsteckendes stattfindet. Diese Längenänderung tritt insbesondere ab drei Nuten massgebend in Erscheinung und hat zur Folge, dass der Querschnitt des Einsteckendes insbesondere an den Uebergängen zu den Nuten eine Reduzierung erfährt. Diese Reduzierung wirkt sich dahingehend nachteilig aus, dass sich die zum Uebertragen des Drehmomentes erforderliche, im wesentlichen radial verlaufende Fläche der Nuten reduziert, so dass die verbleibenden Wandungsteile der Nuten eine Ueberbeanspruchung erfahren und dadurch ein vorzeitiger Verschleiss sowohl an den Einsteckenden als auch an den aufnahmeseitigen Verriegelungselementen auftritt. Unter der Voraussetzung, dass eine solche nachteilige Querschnittsreduzierung nur durch Unterbindung der Längenänderung vermieden werden kann, wird gemäss der Erfindung vorgeschlagen, bei wenigstens einem Teil der Nuten am Nutengrund eine das Fliessen des Werkstoffes verhindernde Profilierung mit im wesentlichen in Achsrichtung des Einsteckendes wirkenden Anschlagflächen einzuwalzen. Eine solche Profilierung schafft während dem Abwälzvorgang zwischen Segment und Einsteckende eine Art momentanen Formschluss, welcher ein Fliessen des Werkstoffes in Längsrichtung dank der in Achsrichtung wirkenden Anschlagflächen der Profilierung blockiert. Der Werkstoff wird damit gezwungen, auch bei einer durch Anordnung einer Vielzahl von Nuten hervorgerufenen starken Verformung radial ausreichend zu fliessen, so dass selbst im Bereich der Uebergänge zu den Nuten keine Querschnittsreduzierungen auftreten. Anstelle einer Profilierung am Nutengrund kann das Werkstück beispielsweise auch durch axiale Anschläge eingespannt und beim Walzen der Nuten somit in seiner Längenausdehnung begrenzt werden.It has been shown that with the arrangement of a relatively large number of grooves distributed over the circumference, there is also a change in length of the insertion end. This change in length occurs in particular from three grooves and has the consequence that the cross section of the insertion end is reduced, particularly at the transitions to the grooves. This reduction has the disadvantage that the essentially radially extending surface of the grooves required for transmitting the torque is reduced, so that the remaining wall parts of the grooves are overstressed and thus premature wear both on the insertion ends and on the receiving side Locking elements occurs. Provided that such a disadvantageous reduction in cross-section can only be avoided by preventing the change in length, it is proposed according to the invention to roll in at least some of the grooves at the bottom of the groove to prevent the flow of the material from flowing with material acting essentially in the axial direction of the insertion end stop surfaces. Such a profiling creates a kind of momentary positive locking during the rolling process between the segment and the insertion end, which blocks flow of the material in the longitudinal direction thanks to the stop surfaces of the profiling acting in the axial direction. The material is thus forced to flow sufficiently radially even in the event of severe deformation caused by the arrangement of a large number of grooves, so that there are no cross-sectional reductions even in the region of the transitions to the grooves. Instead of profiling on the base of the groove, the workpiece can also be clamped, for example, by axial stops and its length dimension can thus be limited when the grooves are rolled.
Eine aus DE-A-2 065 191 bekannte Vorrichtung, die sich zum Einwalzen von wenigstens zwei Nuten in das Einsteckende von Bohr- und Meisselwerkzeugen mittels Segmenten eignet, wobei jedes Segment an einem um eine Achse, die in einer senkrecht zur Achse des Einsteckendes stehenden Ebene liegt, drehbar gelagerten Hebel angeordnet ist und zwischen Einsteckende und Achsen der Hebel eine Relativbewegung parallel zur Achse des Einsteckendes erfolgen kann, zeichnet sich erfindungsgemäß dadurch aus, dass die Segmente eine Gegenprofilierung aufweisen, die ein Fliessen des Werkstoffes in Achsrichtung des Einsteckendes während des Einwalzens verhindert. Beim Schwenken der Segmente um die zur Achsrichtung des Einsteckendes im wesentlichen senkrecht stehende Achse wälzen sich die Segmente somit in Achsrichtung am Einsteckende ab. Die Relativbewegung zwischen den Segmenten und dem Einsteckende kann durch axiales Verschieben der Achse der Segmente oder durch eine Vorschubbewegung des Einsteckendes zustande kommen. Die Segmente sind dabei an drehbar gelagerten Hebeln angeordnet, wobei dies beispielsweise durch eine lösbare Verbindung erfolgen kann. Dadurch beseht die Möglichkeit, die Segmente nach deren Verschleiss auszuwechseln. Die Hebel sind vorzugsweise zweiarmig mit einem vom Segment wegragenden Betätigungsarm ausgebildet. Die Gegenprofilierung mit im wesentlichen in Achsrichtung wirkenden Anschlagflächen schafft während dem Abwälzvorgang zwischen Segment und Einsteckende eine Art momentanen Formschluss, der ein Fliessen des Werkstoffes in Achsrichtung des Einsteckendes verhindert. Der Werkstoff wird dadurch gezwungen, in radialer Richtung ausreichend zu fliessen.A device known from DE-A-2 065 191, which is suitable for rolling at least two grooves into the insertion end of drilling and chiseling tools by means of segments, each segment being about an axis which is perpendicular to the axis of the insertion end Is level, rotatably mounted lever is arranged and between the insertion end and axes of the lever, a relative movement parallel to the axis of the insertion end can be characterized according to the invention in that the segments have a counter-profile, which allows the material to flow in the axial direction of the insertion end during rolling prevented. When the segments are pivoted about the axis which is essentially perpendicular to the axial direction of the insertion end, the segments roll in the axial direction at the insertion end. The relative movement between the segments and the insertion end can be brought about by axially displacing the axis of the segments or by a feed movement of the insertion end. The segments are arranged on rotatably mounted levers, which can be done for example by a releasable connection. This provides the opportunity to replace the segments after they have worn out. The levers are preferably designed with two arms with an actuating arm projecting away from the segment. The counter-profiling with stop surfaces acting essentially in the axial direction creates a kind of momentary positive locking during the rolling process between the segment and the insertion end, which prevents the material from flowing in the axial direction of the insertion end. This forces the material to flow sufficiently in the radial direction.
Für das Verdrehen des Hebels ist vorteilhaft ein Arbeitszylinder vorgesehen. Der Arbeitszylinder kann beispielsweise mittels Druckluft oder zweckmässigerweise mittels einer hydraulischen Flüssigkeit betrieben werden. Da bei relativ geringem Weg verhältnismässig hohe Kräfte notwendig sind, eignen sich als Arbeitszylinder insbesondere hydraulisch betriebene Zylinder, welche auch einen guten Gleichlauf mehrerer gleichzeitig miteinander zu betätigender Zylinder ermöglichen.A working cylinder is advantageously provided for rotating the lever. The working cylinder can be operated for example by means of compressed air or expediently by means of a hydraulic fluid. Since relatively high forces are necessary with a relatively short distance, hydraulically operated cylinders are particularly suitable as working cylinders, which also enable good synchronization of several cylinders to be actuated simultaneously.
Die Erfindung soll nachstehend anhand der sie beispielsweise wiedergebenden Zeichnungen näher erläutert werden. Es zeigen:
- Fig. 1
- eine schematische Darstellung einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens, zu Beginn des Walzvorganges;
- Fig. 2
- die Vorrichtung gemäss Fig. 1, am Ende des Walzvorganges;
- Fig. 3
- einen Schnitt durch die in Fig. 1 dargestellte Vorrichtung, entlang der Linie III-III;
- Fig. 4
- einen Ausschnitt der in Fig. 2 dargestellten Vorrichtung, in stark vergrössertem Massstab.
- Fig. 1
- a schematic representation of an apparatus for performing the method according to the invention, at the beginning of the rolling process;
- Fig. 2
- 1 at the end of the rolling process;
- Fig. 3
- a section through the device shown in Figure 1, along the line III-III.
- Fig. 4
- a section of the device shown in Fig. 2, on a greatly enlarged scale.
Die aus Fig. 1 bis 4 ersichtliche Vorrichtung zur Herstellung eines Einsteckendes 1 weist Segmente 2 auf, die an einem Hebel 3 angeordnet sind. Der Hebel 3 ist um eine zur Achsrichtung des Einsteckendes 1 im wesentlichen senkrecht stehende Achse 4 drehbar gelagert. Die Hebel 3 sind zweiarmig ausgebildet und an dem den Segmenten 2 gegenüberliegenden Ende über Bolzen 5 mit einer Schubstange 6 verbunden. Die Schubstange 6 steht über einen Kugelkopf 6a in Verbindung mit einem Ringkolben 7, der in einem Arbeitszylinder 8 in Achsrichtung des Einsteckendes 1 verschiebbar ist. Das Verschieben des Ringkolbens 7 erfolgt mittels einer Hydraulikflüssigkeit 9, welche dem Arbeitszylinder 8 über einen Anschlussstutzen 10 zugeführt wird.The device shown in FIGS. 1 to 4 for producing an
In der in Fig. 1 dargestellten Ausgangslage wird das Einsteckende 1 zwischen die Segmente 2 zugeführt. Durch die symmetrische Anordnung der Segmente 2 wird das Einsteckende 1 dabei gleichzeitig zentriert. Durch Betätigung des Arbeitszylinders 8 wird nun der Ringkolben 7 in die in Fig. 2 dargestellte Endstellung bewegt. Die mit den Hebeln 3 verbundenen Segmente 2 wälzen sich dabei in Achsrichtung am Einsteckende 1 ab und walzen Nuten 1a in die Oberfläche des Einsteckendes 1 ein. Die Hebel 3 werden dabei vom Ringkolben 7 über die Schubstange 6 um die Achse 4 gedreht. Nach dem Walzvorgang wird das Einsteckende 1 freigegeben und die Hebel 3 können durch den Ringkolben 7 wieder in die in Fig. 1 dargestellte Ausgangslage zurückgedreht werden. Damit ist die Vorrichtung wiederum zur Herstellung der Nuten 1a an einem weiteren Einsteckende 1 bereit.In the starting position shown in FIG. 1, the
Wie Fig. 3 zeigt, sind über den Umfang des Einsteckendes 1 insgesamt vier mit Hebeln 3 verbundene Segmente 2 angeordnet. Die Hebel 3 sind über die Achsen 4 mit Konsolen 11 verbunden. Die Konsolen 11 sind auf einer in Fig. 1 und 2 nicht dargestellten Planscheibe 12 befestigt. Anstelle von vier Konsolen 11 können jedoch auch zwei, drei oder sechs Konsolen 11 auf der Planscheibe 12 angeordnet werden. Wie aus Fig. 3 deutlich ersichtlich ist, wird das Einsteckende 1 von den Segmenten 2 über den gesamten Umfang umgeben. Dadurch wird beim Walzen der Nuten 1a die Erzielung eines präzisen Querschnittes des Einsteckendes 1 gewährleistet.As shown in FIG. 3, a total of four
Wie die aus Fig. 4 ersichtliche, im Massstab vergrösserte Darstellung zeigt, sind die Nuten 1a am Nutengrund mit einer Profilierung 1b versehen, welche im wesentlichen in Achsrichtung wirkende Anschlagflächen 1c aufweist. Die Profilierung 1b wird gleichzeitig mit den Nuten 1a durch die am Hebel 3 angeordneten Segmente 2 in die Oberfläche des Einsteckendes 1 eingewalzt. Die Segmente 2 sind zu diesem Zwecke mit einer der Profilierung 1b entsprechenden Gegenprofilierung 2a versehen. Die Profilierung 1b verhindert beim Walzen der Nuten 1a eine zu starke Längenänderung des Einsteckendes und ermöglicht dabei die Ausbildung eines kantigen Profils des Einsteckendes 1. Eine durch die Längenänderung des Einsteckendes 1 zustande kommende Querschnittsveränderung wird dadurch vermieden.As shown in FIG. 4, which is shown on an enlarged scale, the
Claims (3)
- Forming process for producing grooves in the shank ends of drills and chiselling tools, characterised in that at least two grooves (1a) are rolled simultaneously and in one work cycle to full depth into the shank end (1) by means of a number of segments (2) corresponding with the number of grooves (1a), wherein the segments rotate around a respective axis (4) in a plane which is positioned vertically to the axis of the shaft end (1), and wherein a relative movement is made between the shank end (1) and the axes (4) of the segments (2) parallel with the axis of the shank end (1), and wherein at least a portion of the grooves (1a) have a bottom profile (1b) rolled into the groove, which prevents the work material from flowing in the axial direction of the shank end (1), with abutment surfaces (1c) which act substantially in the axial direction of the shank end (1).
- Device for rolling at least two grooves (1a) into the shank end (1) of drills and chiselling tools by means of segments (2), wherein each segment is placed on a plane, which is rotatable around an axis (4) which is placed in a vertical plane relative to the axis of the shank end (1), and wherein a relative movement parallel with the axis of the shank end (1) can be made between shank end (1) and axes (4) of the levers, characterised in that the segments (2) have a counter profile which prevents a flow of work material in the axial direction of the shaft end (1) whilst rolling.
- Device according to claim 2, characterised in that operating cylinders (8) are provided for turning the levers (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89810372T ATE98537T1 (en) | 1988-05-25 | 1989-05-19 | METHOD AND DEVICE FOR ROLLING GROOVES IN SHAFT END OF TOOLS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3817680 | 1988-05-25 | ||
| DE3817680A DE3817680A1 (en) | 1988-05-25 | 1988-05-25 | FORMING METHOD FOR TOOLS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0344117A2 EP0344117A2 (en) | 1989-11-29 |
| EP0344117A3 EP0344117A3 (en) | 1990-12-27 |
| EP0344117B1 true EP0344117B1 (en) | 1993-12-15 |
Family
ID=6355057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89810372A Expired - Lifetime EP0344117B1 (en) | 1988-05-25 | 1989-05-19 | Method and apparatus for rolling grooves in tool shanks |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4941339A (en) |
| EP (1) | EP0344117B1 (en) |
| JP (1) | JP2551996B2 (en) |
| AT (1) | ATE98537T1 (en) |
| CA (1) | CA1327133C (en) |
| DE (2) | DE3817680A1 (en) |
| DK (1) | DK170363B1 (en) |
| FI (1) | FI95358C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4022261C1 (en) * | 1990-07-12 | 1991-11-21 | Mannesmann Ag, 4000 Duesseldorf, De | |
| DE19622355A1 (en) | 1996-06-04 | 1997-12-11 | Bayer Ag | Molded bodies that release agrochemicals |
| CN1059850C (en) * | 1997-04-09 | 2000-12-27 | 郑安明 | Method for precision hot-forging mine drill bit |
| DE102018113978B3 (en) * | 2018-06-12 | 2019-09-05 | Mag Ias Gmbh | Cold rolling machine and method for producing a profile on a workpiece |
| CH714772A1 (en) * | 2018-11-15 | 2019-09-13 | Grob Ernst Fa | Device and method for cold forming profiling of workpieces. |
| DE102021109639B3 (en) | 2021-04-16 | 2022-08-25 | Schaeffler Technologies AG & Co. KG | Process for the production of a component having a toothed profile; and tool device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US685417A (en) * | 1901-01-07 | 1901-10-29 | Lewis Williams | Spike-grooving machine. |
| US1231324A (en) * | 1916-04-27 | 1917-06-26 | Cleveland Hardware Company | Master-die for forging dies for drop-hammers, presses, and the like. |
| US3591136A (en) * | 1969-02-26 | 1971-07-06 | Arthur E Bishop | Rotary valve with curved valve slot |
| DE3015893A1 (en) * | 1980-04-24 | 1981-10-29 | Hilti AG, 9494 Schaan | METHOD FOR PRODUCING TAKE-UP GROOVES ON TOOLS |
| GB2127327B (en) * | 1982-08-20 | 1986-04-30 | Alton Systems Limited | An antiskid surface treatment for use on scaffolding components |
| JPS59157742U (en) * | 1983-04-04 | 1984-10-23 | 新日本製鐵株式会社 | Device that applies strain to the steel plate surface |
| DE3413432A1 (en) * | 1983-12-27 | 1985-07-04 | Gebrüder Heller GmbH Werkzeugfabrik, 2807 Achim | DRILLS FOR HAND DRILLING MACHINES |
| AU566086B2 (en) * | 1984-10-04 | 1987-10-08 | Bishop Steering Technology Limited | Valve cores |
-
1988
- 1988-05-25 DE DE3817680A patent/DE3817680A1/en not_active Withdrawn
-
1989
- 1989-05-19 EP EP89810372A patent/EP0344117B1/en not_active Expired - Lifetime
- 1989-05-19 DE DE89810372T patent/DE58906401D1/en not_active Expired - Fee Related
- 1989-05-19 AT AT89810372T patent/ATE98537T1/en not_active IP Right Cessation
- 1989-05-23 FI FI892493A patent/FI95358C/en not_active IP Right Cessation
- 1989-05-23 US US07/355,566 patent/US4941339A/en not_active Expired - Lifetime
- 1989-05-23 JP JP1127973A patent/JP2551996B2/en not_active Expired - Lifetime
- 1989-05-24 DK DK252789A patent/DK170363B1/en not_active IP Right Cessation
- 1989-05-24 CA CA000600556A patent/CA1327133C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0225234A (en) | 1990-01-26 |
| FI892493A (en) | 1989-11-26 |
| ATE98537T1 (en) | 1994-01-15 |
| CA1327133C (en) | 1994-02-22 |
| FI95358B (en) | 1995-10-13 |
| DK252789A (en) | 1989-11-26 |
| JP2551996B2 (en) | 1996-11-06 |
| DE58906401D1 (en) | 1994-01-27 |
| DK252789D0 (en) | 1989-05-24 |
| FI95358C (en) | 1996-01-25 |
| FI892493A0 (en) | 1989-05-23 |
| EP0344117A3 (en) | 1990-12-27 |
| DE3817680A1 (en) | 1989-12-07 |
| US4941339A (en) | 1990-07-17 |
| DK170363B1 (en) | 1995-08-14 |
| EP0344117A2 (en) | 1989-11-29 |
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