NO871088L - ROTATE SPONGE LIFTING SALES. - Google Patents
ROTATE SPONGE LIFTING SALES.Info
- Publication number
- NO871088L NO871088L NO871088A NO871088A NO871088L NO 871088 L NO871088 L NO 871088L NO 871088 A NO871088 A NO 871088A NO 871088 A NO871088 A NO 871088A NO 871088 L NO871088 L NO 871088L
- Authority
- NO
- Norway
- Prior art keywords
- inner part
- channel
- tool
- mold body
- axis
- Prior art date
Links
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000003801 milling Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 235000013601 eggs Nutrition 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000000462 isostatic pressing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/34—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools milling cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/004—Article comprising helical form elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2250/00—Compensating adverse effects during turning, boring or drilling
- B23B2250/12—Cooling and lubrication
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Drilling Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catching Or Destruction (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Confectionery (AREA)
- Milling Processes (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Scissors And Nippers (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Oppfinnelsen vedrører et roterbart sponavhevende verktøy, særlig bore-, frese- og/eller slipeverktøy, med verktøy-legemer med utpreget lengdeutstrekning i retning av rotasjonsaksen henholdsvis hovedaksen og med hårdmetall eller hårdstoff, samt med minst et, fortrinnsvis i en vinkel forskjellig fra 0° i forhold til aksen, særlig omtrentlig i vindelaktig forløpende spor på yttersiden og minst et i samsvar med sporet forløpende og med minst en egg forsynt steg, samt med minst en kanal for føring av et strømmende medium, hvilken kanal i hovedsaken går på langs gjennom verktøylegemet. The invention relates to a rotatable chip-removing tool, in particular drilling, milling and/or grinding tools, with tool-bodies with a pronounced longitudinal extension in the direction of the axis of rotation or the main axis and with cemented carbide or hard material, and with at least one, preferably at an angle different from 0° in relation to the axis, particularly approximately in a spirally extending groove on the outside and at least one step extending in accordance with the groove and provided with at least one egg, as well as with at least one channel for guiding a flowing medium, which channel mainly runs longitudinally through the tool body .
I forbindelse med rasjonalisering og automatisering av den sponavhevende metallbearbeidel se, hvor det for stadig vanskeligere bearbeidelsesoppgaver stilles stigende krav til verktøyene, såsom lengre levetid og høyere arbeidshastighet, benyttes det i stigende grad bore-, frese- og slipeverktøy fremstilt av sintret massiv-hånrdmetall eller- hårdstoff. Slike verktøy anvendes eksempelvis for utforming av henholdsvis for bearbeidelse av dype hullboringer i emner av høyfaste legeringer. I verktøyet vil det herunder ofte opptre temperaturer langt over 600°C. For oppnåelse av høy borsynk, og særlig for å fremme sporfJerningen fra de dype borhullene, er borene forsynt med en sentral kanal for spylemiddeltil-førsel. Fra denne sentrale kanal går det i nærheten av borets fremre ende ut flere i borenden munnende grenkanaler hvori-gjennom spylemiddelet kan bringes frem til arbeidsstedet. Fremstillingen av slike bor kan i hovedsaken skje ved at det ved hjelp av mekanisk eller isostatisk pressing med utgangspunkt i et hårdmetallsintergranulat tilveiebringes et råemne med denn ønskede dimensjon. Etter en forsintring innarbeides det eksempelvis ved hjelp av diamantslipeskiver ytterspor med et ønsket, eksempelvis vindelaktig forløp. Det bores også ut en spylemiddelkanal. Deretter foretas en avsluttende sintring med etterfølgende sluttbearbeidelse, særlig for utforming av vindeleggene. In connection with the rationalization and automation of chip-removing metalworking, where increasing demands are placed on the tools for increasingly difficult processing tasks, such as longer service life and higher working speed, drilling, milling and grinding tools made of sintered solid metal or - hard substance. Such tools are used, for example, for designing or for machining deep holes in workpieces made of high-strength alloys. Temperatures far above 600°C will often occur in the tool. To achieve a high drill sink, and in particular to promote the removal of traces from the deep drill holes, the drills are equipped with a central channel for flushing agent supply. From this central channel, several branch channels opening at the drill end exit near the front end of the drill, through which the flushing agent can be brought to the workplace. The production of such drills can mainly take place by means of mechanical or isostatic pressing, starting from a cemented carbide sinter granulate, to provide a blank with the desired dimension. After pre-sintering, outer grooves with a desired, for example spiral-like course are incorporated, for example with the aid of diamond grinding wheels. A rinse aid channel is also drilled out. A final sintering is then carried out with subsequent final processing, especially for the design of the winding eggs.
Utførelsen av boringen er krevende og blir stadig vanskeligere og mer unøyaktig med økende borlengde og dermed forbundet kjølekanallengde. Det er naturligvis mulig å foreta utboring i det forsintrerte formlegeme i fra begge endesider, men i praksis vil man da ikke kunne oppnå en nøyaktig innretting av de to borepartier. Dette unøyaktige møtested i kanalen hindrer spylemiddelstrømmen og gir trykktap. The execution of the drilling is demanding and becomes increasingly difficult and more imprecise with increasing drilling length and thus associated cooling channel length. It is of course possible to drill out the sintered molded body from both end sides, but in practice it will not be possible to achieve an exact alignment of the two drill parts. This imprecise meeting point in the channel prevents the flow of flushing agent and causes a loss of pressure.
Hensikten med oppfinnelsen er å tilveiebringe et verktøy som nevnt innledningsvis, ved hvilket verktøy man unngår en av fremsti 11ingsmetoden betinget begrensning av lengden, samtidig som fremstillingen skal være mindre krevende. The purpose of the invention is to provide a tool as mentioned in the introduction, with which tool one avoids a limitation of the length conditioned by the manufacturing method, while at the same time the manufacturing should be less demanding.
Oppfinnelsen vedrører således et roterbart sponavhevende verktøy, særlig bore-, frese- eller slipeverktøy av den innledningsvis nevnte type, og verktøyet er kjennetegnet ved at det i et av en aksen inneholdende innerdel og av minst en med innerdelen i hovedsaken over hele lengden flate-sinter-forbundet ytterdel med i det minste et radielt ytre stegområde, er det i området ved sinterforbandet mellom de nevnte deler anordnet minst en i hovedsaken i samsvar med stegets, fortrinnsvis vindelaktige, forløp forløpende kanal, idet dens vegg i hovedsaken over hele sin utstrekning delvis dannes av innerdelen og forøvrig dannes av ytterdelen. Ved en slik bor, fres eller lignende, bestående av to med hverandre integrert ved hjelp av flate-sinterforband over i hovedsaken hele lengden forbundne inner- og ytterdel henholdsvis ytterdeler, oppnås den fordel at verktøyet ikke er begrenset i lengden. Videre er kanal tverrsnittet mer varierbart. Dersom det forefinnes flere steg med egger så kan hvert av disse steg ha en tilordnet, i samsvar med stegets forløp forløpende kanal, hvorved det oppnås et høyere totaltverrsnitt og dermed også større spylemiddelgjennomgang, med samtidig bedring av sponfJerningen. Videre kan det oppnås en nøyaktig kjøling av vindlene og eggene over hele lengden innenifra, og man oppnår dessutenden fordel at hver kanal vil kunne munne ut på et ønsket sted på verktøyets endeside, altså eksempelvis ved bor mellom borets spiss og borets omkrets, slik at det kan oppnås optimale plasseringer av spylemediumutløpene. Som følge av den nøyaktige kjøling av eggene kan skjærnastigheten og borsynken økes betydelig. Det er ikke lenger nødvendig med den krevende boring på langs gjennom det forsintrede verk-tøylegeme. Som følge av den kanalen i hvert steg omsluttende integrerte forbindelse mellom innerdelen og en eller flere ytterdeler, som i det minste innbefatter radielt sett ytre stegområder, oppnås dessuten en slags sandwich-struktur virkning, hvorved den fra lange verktøy kjente tendens til vibrasjon vil være vesentlig redusert, også ved høye turtall, slik at det således muliggjøres større lengder og større nøyaktighet for boringene. Som følge av den todelte utforming av verktøylegemet kan kanalene ha en hvilken som helst ønsket, til vindlene tilpasset stigning og spiralvinkel. En ytterligere fordel er at ved ettersliping av boret vil man ikke være underkastet noen begrensninger, fordi kanalene over hele lengden vil være anordnet i samme avstand fra rotasjonsaksen. The invention thus relates to a rotatable chip-removing tool, in particular a drilling, milling or grinding tool of the type mentioned at the outset, and the tool is characterized by the fact that in one of the inner parts containing the axis and of at least one with the inner part in the main body over the entire length, surface-sintering -connected outer part with at least one radially outer step area, in the area of the sinter connection between the mentioned parts, at least one is arranged in the main body in accordance with the step's, preferably spiral-like, continuous channel, as its wall is partially formed in the main body over its entire extent of the inner part and is otherwise formed by the outer part. With such a drill, milling cutter or similar, consisting of two integrated with each other by means of surface-sintered joints over essentially the entire length of connected inner and outer parts respectively outer parts, the advantage is achieved that the tool is not limited in length. Furthermore, the channel cross-section is more variable. If there are several steps with eggs, then each of these steps can have an assigned channel, in accordance with the progress of the step, whereby a higher total cross-section is achieved and thus also greater flushing agent passage, with a simultaneous improvement in chip removal. Furthermore, a precise cooling of the coils and eggs can be achieved over the entire length from the inside, and you also get the advantage that each channel will be able to open at a desired place on the end side of the tool, i.e. for example at drills between the tip of the drill and the circumference of the drill, so that optimal locations of the flushing medium outlets can be achieved. As a result of the precise cooling of the eggs, the hardness and the boron sink can be increased significantly. There is no longer any need for the demanding longitudinal drilling through the sintered tool body. As a result of the integrated connection between the inner part and one or more outer parts enclosing the channel in each step, which at least includes radially outer step areas, a kind of sandwich structure effect is also achieved, whereby the tendency to vibration known from long tools will be significant reduced, also at high speeds, so that greater lengths and greater accuracy for the bores are thus made possible. As a result of the two-part design of the tool body, the channels can have any desired pitch and spiral angle adapted to the spirals. A further advantage is that when regrinding the drill, one will not be subject to any restrictions, because the channels over the entire length will be arranged at the same distance from the axis of rotation.
Med hesnyn til sinterforbindelsen skal det nevnes at det fra DE-OS 28 10 746 er kjent avlange hårdmetallegemer bygget opp av sinterforbundne kjerne- og mantellegemer. With regard to the sinter connection, it should be mentioned that from DE-OS 28 10 746 oblong cemented carbide bodies built up of sinter-connected core and mantle bodies are known.
Det nye verktøy kan fremstilles på en enkel måte dersom kanalen anordnes slik at den strekker seg langs en akseparallell sylindrisk sinterforbandflate mellom innerdel og ytterdel. The new tool can be manufactured in a simple way if the channel is arranged so that it extends along an axis-parallel cylindrical sinter joint surface between the inner part and the outer part.
Dersom, som foretrukket, den av ytterdelen dannede del av kanalveggen tilsvarer sinterforbandflaten mellom innerdel og ytterdel, vil man til tross for tilstedeværelsen av en kanal ikke få noen materialsvekninger i stegets eller stegenes yttterdeler, hvor verktøyet er underkastet sterke mekaniske påkjenninger. If, as preferred, the part of the channel wall formed by the outer part corresponds to the sinter connection surface between the inner part and the outer part, despite the presence of a channel, no material weakening will occur in the outer parts of the step or steps, where the tool is subjected to strong mechanical stresses.
For oppnåelse av høy stabilitet mot svingninger, og for å ta hensyn til de uklike påkjenninger på verktøy-yttersiden og i verktøykjernen, kan det fordelaktig sørges for at de sinterforbundne inner- og ytterdeler har ulik kjemisk sammensetning og/eller oppviser ulike fysikalske egenskaper. Således kan eksemeplvis innerdelen være utført av et seigere sinterhårdmetall, eksempelvis K 20, mens ytterdelen kan være av et mer slitasjefast sinterhårdmetall K 10, begge ifølge IS0-recommandation R 513 1, november 1966. In order to achieve high stability against fluctuations, and to take into account the unequal stresses on the tool exterior and in the tool core, it can advantageously be ensured that the sintered inner and outer parts have different chemical compositions and/or exhibit different physical properties. Thus, for example, the inner part can be made of a tougher sintered carbide, for example K 20, while the outer part can be of a more wear-resistant sintered carbide K 10, both according to IS0 recommendation R 513 1, November 1966.
I tillegg til den bedre forsyning av verktøyet med spyle-middel vil i dette tilfelle verktøyets radielt sett ytre område ha en høyere sl itasJefasthet enn innerdelen, idet innerdelen gir høyere seighet. In addition to the better supply of the tool with flushing agent, in this case the radially outer area of the tool will have a higher wear resistance than the inner part, as the inner part gives higher toughness.
Det skal i tillegg bemerkes at kanalene kan ha avsnitt med ulike forløp. Således kan de ha vindelaktig forløp i området til vindlene,, eggene eller lignende, mens de i verktøy-skaftet kan ha et akseparallelt forløp langs sinterforband-flanten. It should also be noted that the channels may have sections with different courses. Thus, they can have a spiral-like course in the area of the windings, eggs or the like, while in the tool shaft they can have an axis-parallel course along the sinter connection flange.
En foretrukken fremgangsmåte til fremstilling av verktøyet ifølge oppfinnelsen består i at det av hårdmetallgranulat ved hjelp av, eventuelt isostatisk, pressing og etterfølgende forsintring dannes et fortrinnsvis rotasjonssymmetrisk innerdel-formlegeme og et ytterdel-formlegeme, med en til innerdel-formlegemets yttermantel dimensjonsmessig tilsvarende utsparing, at det i innerdel-formlegemets mantel, i samsvar med et ønsket, eksempelvis vindelaktig, forløp av en kanal for et flytende medium, utformes minst et spoor, en renne eller lignende, at innerdel, formlegemet anordnes i ytterdel-formlegemet, med sin ytterside fortrinnsvis i full flatekontakt med ytterdel-formlegemets innside, og at de to legemer materialforbindes med hverandre ved hjelp av sintring, med etterfølgende sluttbearbeidelse. Ved en slik fremstilling erstattes den hittil krevende boring gjennom et forsintret formlegeme av envesentlig enklere utforming av et i samsvar med det ønskede kanalforløp forløpende spor på innerdel-formlegemets ytterflate, noe som kan skje uten problemer på en automatisk måte. Fortrinnsvis kan grupper av ved siden av hverandre forløpende kanaler utformes når boringen har mer enn en vindel. Den etter ferdigsintringen foretatte utforming av ytter sporene, med utforming av borvindlene henholdsvis de eggbærende steg i en fres, kan skje med en slik dybde at sporbunnen går inn i innerdelen. For det tilfelle at yttersporene skal ha en liten dybde og ikke gå inn i innerdelen, kan man også gå frem på den måten at det i det forsintrede ytterdel-formlegeme, dvs. i dets mantel, utformes tilsvarende spor før sammensettingen, slik at det etter sintringen bare vil være nødvendig med en etterarbeidelse av sporene og en sliping av eggene. A preferred method for producing the tool according to the invention consists in forming a preferably rotationally symmetrical inner part mold body and an outer part mold body from cemented carbide granules by means of possibly isostatic pressing and subsequent sintering, with a recess corresponding in dimensions to the outer shell of the inner part mold body, that in the mantle of the inner part mold body, in accordance with a desired, for example spiral-like, course of a channel for a liquid medium, at least a track, a channel or the like is designed, that the inner part, the mold body is arranged in the outer part mold body, preferably with its outer side in full surface contact with the inside of the outer mold body, and that the two bodies are materially connected to each other by means of sintering, with subsequent finishing. With such a production, the hitherto demanding drilling through a sintered mold body is replaced by a significantly simpler design of a groove running in accordance with the desired channel course on the outer surface of the inner part mold body, which can be done without problems in an automatic manner. Preferably, groups of channels running next to each other can be designed when the bore has more than one helix. The design of the outer grooves after completion of sintering, with the design of the drill bits or the egg-carrying steps in a milling cutter, can be done to such a depth that the bottom of the groove goes into the inner part. In the event that the outer grooves are to have a small depth and do not go into the inner part, one can also proceed in such a way that corresponding grooves are formed in the sintered outer part mold body, i.e. in its mantle, before assembly, so that after the sintering will only require a post-processing of the grooves and a grinding of the eggs.
For å oppnå en særlig også i området ved kanalen eller kanalene fullstendig sinterforbindelse er det særlig fordelaktig før forsintringen av innerdel-formelegemet å presse dette, særlig isostatisk, med et trykk som er minst 20$ og fortrinnsvis 30-100$ høyere enn det presstrykk som benyttes ved dannelsen av ytterdel-formlegemet. Man utnytter da forskjellen i krymping mellom innerdel og ytterdel under fremstillingen av verktøy-formlegemet. Svinnet eller krymp-ingen i ytterdelen vil være kraftigere, som følge av det lavere pressetrykk, og det oppnås således en slags innkrym-ping av innerdelen, med dannelse av en høytett sinterforbindelse mellom de anliggende delflater. Holder man seg innenfor de nevnte grenser så oppnås et meget sikkert sinterforband, samtidig som man i kanalveggen oppnår en glatt forbindelse uten spalter ved skjøtstedene mellom innerdel og ytterdel. In order to achieve a complete sintering connection, especially also in the area of the channel or channels, it is particularly advantageous before the sintering of the inner part mold body to press it, especially isostatically, with a pressure which is at least 20$ and preferably 30-100$ higher than the pressing pressure which used in the formation of the outer part mold body. The difference in shrinkage between the inner part and the outer part is then exploited during the production of the tool mold. The shrinkage or shrinkage in the outer part will be stronger, as a result of the lower pressing pressure, and a kind of shrinking of the inner part is thus achieved, with the formation of a highly tight sinter connection between the adjacent part surfaces. If you stay within the aforementioned limits, a very secure sinter connection is achieved, while at the same time you achieve a smooth connection in the channel wall without gaps at the joints between the inner part and the outer part.
Eksempel:Example:
Av en hårdmetall-sinterpulverblanding med sammensetningen 6,3 vekt-# Co, restWC + 2,5 vekt-# (TiTaNb)C-gJennomsnitts-kornstørrelse 1 jjm, ble det ved hjelp av isostatisk pressing med et trykk på 1800 bar utformet et formlegeme som ble forsintret en time etter en 11 timers oppvarming til ca. 750°C. Av dette formlegeme ble det utformet 180 mm langt, omtrentlig synlindrisk innerdel-formlegeme med en diameter på 11,0 mm. Dette formlegemes mantelflate ble forsynt med tre spor med omtrent halvsirkelformede tverrsnitt med radius From a cemented carbide sinter powder mixture with the composition 6.3 wt-# Co, residual WC + 2.5 wt-# (TiTaNb)C-gAverage grain size 1 jjm, a molded body was formed by means of isostatic pressing with a pressure of 1800 bar which was sintered one hour after an 11-hour heating to approx. 750°C. From this mold, a 180 mm long, approximately cylindrical inner part mold with a diameter of 11.0 mm was formed. The mantle surface of this shaped body was provided with three grooves with approximately semi-circular cross-sections with a radius
1,1 mm. Sporene ble utformet med utgangspunkt i tre i innbyrdes like vinkelavstander plasserte steder på ende-flatene og ble utformet med 30° stigningsvinkel. 1.1 mm. The tracks were designed on the basis of three equally spaced locations on the end surfaces and were designed with a 30° pitch angle.
Av et med i hovedsaken samme sammensetning tilveiebragte granulat med en gjennomsnittskornstørrelse på 0,7 pm ble det ved hjelp av isostatisk pressing med 1000 bar, etterfølgende forsintring under de foran beskrevne betingelser, og etter-følgende bearbeidelse, tilveiebragt en 180 mm lang hulsyl-indrisk formlegemehylse med en innerdiameter på 11,1 mm og med en ytterdiameter på 22,2 mm. Det med de tre kanalspor forsynte innerdel-formlegeme ble innførti ytterdel-hylsens hulrom og det slik sammensatte legeme ble etter 10 timers oppvarming ved 1450°C sintret en time, under et trykk på A 180 mm long hollow cylinder was produced from a granule with essentially the same composition, with an average grain size of 0.7 pm, by means of isostatic pressing at 1000 bar, subsequent sintering under the conditions described above, and subsequent processing. mold body sleeve with an inner diameter of 11.1 mm and with an outer diameter of 22.2 mm. The inner part mold body provided with the three channel grooves was introduced into the cavity of the outer part sleeve and the body thus assembled was, after 10 hours of heating at 1450°C, sintered for one hour, under a pressure of
0,1 mbar. Det derved frembragte bor-formlegeme hadde en lengde på 14,4 mm og en diameter påå 17,5 mm. I yttermantelen ble det på respektive steder mellom de tre på forhånd i sinter legemet utformede kjølekanaler uttatt vindelspor. Deretter ble eggene slipt og bordet kappet til ønsket lengde. Det på denne måten oppnådde bor muliggjør en gjennomsnittlig øking av borfremføringshastigheten på 1,4 sammenlignet med et lignende bor med konvensjonell kjølekanal med diameter 2 mm og med to avgreningskanaler i borspissen, fremstilt av en sintermetallgranulatblanding som for ytterdelen i det ovenfor beskrevne bor, og forøvrig under like betingelser og ved boring i grått støpestål. 0.1 mbar. The resulting drill body had a length of 14.4 mm and a diameter of 17.5 mm. In the outer casing, spiral grooves were made at respective locations between the three cooling channels previously formed in the sintered body. The eggs were then ground and the table cut to the desired length. The drill obtained in this way enables an average increase in the drill feed rate of 1.4 compared to a similar drill with a conventional cooling channel with a diameter of 2 mm and with two branch channels in the drill tip, made from a sintered metal granulate mixture as for the outer part of the drill described above, and otherwise under the same conditions and when drilling in gray cast steel.
Oppfinnelsen skal forklares nærmere under henvisning til tegningen. The invention shall be explained in more detail with reference to the drawing.
I det skjematiske riss er det med stiplede linjer antydet et borlegeme 1 ifølge oppfinnelsen, slik dette ser ut før de utvendige vindelspor 7 er utformet. Borlegemet 1 er oppbygget av en aksel a oppvisende sylindrisk innerdel 2 og en ytterdel 3 som omgir innerdelen som en hylse. Begge deler er fremstilt av sinterhårdmetal 1 . Delene er enhetlig forbundne med hverandre ved hjelp av et ekte sinterforband 23 mellom innerdelens 2 ytterflate 2 og innerflaten 30 i ytterdelens 3 hulrom. På endeflaten til borlegemet 1 er det vist hvordan det i innerdelens 2 ytterflate 20 med like vinkelavstander a er uttatt tre i tverrsnittet omtrent halvsirkelformede spor med her i hovedsaken vindelaktige forløp, idet sporveggen 72 dannes av innerdelen 2. Den resterende del 73 av veggen 71 i de respektive lukkede kanaler 7 dannes av ytterdelens 3 innerflate 30 og har samme krumming som denne. Med fullt opptrukne linjer er det vist hvordan i ytterdelen 3 utformede spor 35 går ut i fra borets endeside etter ferdigsintrer-ingen. I dette tilfelle strekker sporbunnene seg inn i innerlegemet 2. De dannede steg 5 med egger 50 har samme forløp som kanalene 3 inne i hårdmetall-boret. In the schematic diagram, dotted lines indicate a drill body 1 according to the invention, as it appears before the external spiral grooves 7 are formed. The drill body 1 is made up of a shaft a showing a cylindrical inner part 2 and an outer part 3 which surrounds the inner part like a sleeve. Both parts are made of sinter carbide 1 . The parts are uniformly connected to each other by means of a real sinter connection 23 between the outer surface 2 of the inner part 2 and the inner surface 30 in the cavity of the outer part 3. On the end surface of the drill body 1, it is shown how in the outer surface 20 of the inner part 2, at equal angular distances a, three approximately semi-circular grooves in the cross-section have been taken out, with here mainly spiral-like courses, the groove wall 72 being formed by the inner part 2. The remaining part 73 of the wall 71 in the respective closed channels 7 are formed by the inner surface 30 of the outer part 3 and have the same curvature as this. With solid lines, it is shown how grooves 35 formed in the outer part 3 extend from the end side of the drill after completion of sintering. In this case, the groove bottoms extend into the inner body 2. The formed steps 5 with eggs 50 have the same course as the channels 3 inside the cemented carbide drill.
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0072186A AT386145B (en) | 1986-03-18 | 1986-03-18 | ROTATABLE CHIP TOOL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO871088D0 NO871088D0 (en) | 1987-03-17 |
| NO871088L true NO871088L (en) | 1987-09-21 |
Family
ID=3498058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO871088A NO871088L (en) | 1986-03-18 | 1987-03-17 | ROTATE SPONGE LIFTING SALES. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0238477B1 (en) |
| AT (2) | AT386145B (en) |
| DE (1) | DE3772418D1 (en) |
| DK (1) | DK126387A (en) |
| NO (1) | NO871088L (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002049801A1 (en) * | 2000-12-21 | 2002-06-27 | Element Six (Pty) Ltd | Method of making a cutting tool |
| SE522600C2 (en) * | 2001-10-24 | 2004-02-24 | Seco Tools Ab | Drilling tool for cutting machining with three cutting edges at which three coil channels open |
| DE10344620B4 (en) * | 2003-09-25 | 2007-07-05 | Werkzeugfabrik Manfred Schwegler | Drilling tool and clamping sleeve |
| DE102004021190A1 (en) * | 2004-04-29 | 2005-12-29 | Günther & Co GmbH | Interface for a cutting tool |
| CN104955599A (en) | 2013-01-29 | 2015-09-30 | Osg株式会社 | Drill |
| US9623490B2 (en) | 2013-03-26 | 2017-04-18 | Osg Corporation | Three-bladed drill with cutting fluid supply hole |
| CN109465481B (en) * | 2018-12-07 | 2020-06-02 | 西安交通大学 | Integral milling cutter with self-cooling lubricating structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL62342A (en) * | 1981-03-10 | 1983-12-30 | Iscar Ltd | Method of bonding cemented carbide bodies and composite hard metal products manufactured thereby |
| GB2153850B (en) * | 1984-02-07 | 1987-08-12 | Nippon Piston Ring Co Ltd | Method of manufacturing a camshaft |
| DE3601385A1 (en) * | 1986-01-18 | 1987-07-23 | Krupp Gmbh | METHOD FOR PRODUCING SINTER BODIES WITH INNER CHANNELS, EXTRACTION TOOL FOR IMPLEMENTING THE METHOD, AND DRILLING TOOL |
-
1986
- 1986-03-18 AT AT0072186A patent/AT386145B/en not_active IP Right Cessation
-
1987
- 1987-03-12 DK DK126387A patent/DK126387A/en not_active Application Discontinuation
- 1987-03-16 EP EP87890050A patent/EP0238477B1/en not_active Expired - Lifetime
- 1987-03-16 DE DE8787890050T patent/DE3772418D1/en not_active Expired - Lifetime
- 1987-03-16 AT AT87890050T patent/ATE66634T1/en not_active IP Right Cessation
- 1987-03-17 NO NO871088A patent/NO871088L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK126387A (en) | 1987-09-19 |
| ATA72186A (en) | 1987-12-15 |
| EP0238477A2 (en) | 1987-09-23 |
| DK126387D0 (en) | 1987-03-12 |
| AT386145B (en) | 1988-07-11 |
| ATE66634T1 (en) | 1991-09-15 |
| EP0238477B1 (en) | 1991-08-28 |
| NO871088D0 (en) | 1987-03-17 |
| DE3772418D1 (en) | 1991-10-02 |
| EP0238477A3 (en) | 1989-05-24 |
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