NO771966L - PROCEDURES FOR MANUFACTURING STRENGTHS FOR RELEASE SCREW SHAPED IN THE INTERIOR PART - Google Patents
PROCEDURES FOR MANUFACTURING STRENGTHS FOR RELEASE SCREW SHAPED IN THE INTERIOR PARTInfo
- Publication number
- NO771966L NO771966L NO771966A NO771966A NO771966L NO 771966 L NO771966 L NO 771966L NO 771966 A NO771966 A NO 771966A NO 771966 A NO771966 A NO 771966A NO 771966 L NO771966 L NO 771966L
- Authority
- NO
- Norway
- Prior art keywords
- spindle
- inner part
- tube
- projections
- steel tubes
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/152—Making rifle or gun barrels
- B21C37/153—Making tubes with inner or outer guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls with helical guides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Materials For Medical Uses (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Description
Fremgangsmåte til fremstilling avMethod for the production of
stålrør for geværløp skrueformetsteel tube for rifle barrel helical
riflet i den indre del.grooved in the inner part.
Oppfinnelsen vedrører en fremgangsmåte for fremstilling av stålrør for geværløp med den indre del skrueformet riflet, som til forskjell fra andre fremgangsmåter ikke går ut fra en boret og riflet stang ved brosjing eller ved til-svarende fremgangsmåte, me,n det gåes ut fra et stykke, hvis dimensjoner, både med hensyn til diameter og tykkelse er større enn de endelige dimensjoner som skal oppnås. Ved å gå frem således ved kaldstrekking oppnås en sylindrisk eller polygonal ytre profil ifølge, det som er ønsket og også en riflet indre del. The invention relates to a method for the production of steel tubes for rifle barrels with the inner part helically fluted, which, unlike other methods, does not start from a drilled and fluted rod by broaching or a similar method, but starts from a piece , whose dimensions, both in terms of diameter and thickness, are greater than the final dimensions to be achieved. By proceeding thus by cold drawing, a cylindrical or polygonal outer profile is obtained according to what is desired and also a fluted inner part.
Det er en hensikt med oppfinnelsen å oppnå den indre riflede overflate med en indre ruhet til 0,7 mikra, som ikke kan oppnås ved boring og brosjing-prosesser, hvor det bare kan oppnås ruheter større enn 2 mikra, idet det skal for-stås at denne ruhet er både ved bunnen og toppen av sporene. It is a purpose of the invention to achieve the inner grooved surface with an inner roughness of 0.7 microns, which cannot be achieved by drilling and broaching processes, where only roughnesses greater than 2 microns can be achieved, as it must be understood that this roughness is both at the bottom and the top of the tracks.
På den annen side fremkommer den ikke eksisterende konisitet, dvs... der er ingen synlig forskjell mellom de indre diametere på rørets begge ender som ikke oppnås ved andre fremgangsmåter, samtidig som det oppnås en nøyaktig profil av sporet langs hele røret. On the other hand, the non-existent conicity appears, ie... there is no visible difference between the inner diameters of the pipe's two ends which is not achieved by other methods, while at the same time an accurate profile of the groove is obtained along the entire pipe.
Det er videre en fordel at det ikke foreligger ukorrigerte operasjoner som dårlig drilling, således at det blant annet også oppnås materialbesparelse. It is also an advantage that there are no uncorrected operations such as poor drilling, so that, among other things, material savings are also achieved.
Videre kan det ved foreliggende fremgangsmåte oppnås lengder opptil 25,30 eller flere meter. Furthermore, with the present method, lengths of up to 25, 30 or more meters can be achieved.
Fra det foregående sees at fremgangsmåten medfører viktige tekniske og økonomiske forbedringer for den indre rif-lingsprosess, spesielt for fremstilling av geværløp. From the foregoing it can be seen that the method entails important technical and economic improvements for the internal rifling process, especially for the manufacture of rifle barrels.
I det følgende skal det omtales kald-strekkings-prosesser. i In the following, cold-stretching processes will be discussed. in
Først vil det dannes et strekkpunkt i hvert basisrør, således at enden av hvert rør kan innføres i en ytre sylinder eller en enkeltholder og strekkes, idet den holdes godt fra nevnte ende. First, a stretching point will be formed in each base tube, so that the end of each tube can be introduced into an outer cylinder or a single holder and stretched, being held firmly from said end.
Når strekkpunktet først er dannet underkastes røret en egnet'kjemisk behandling som pickling, vasking etc. for å oppnå en oksydfri ytre og indre overflate, som er godt smørt som vil muliggjøre kald-strekking uten å danne linjer eller merker på materialet under prosessen. Once the tensile point is formed, the pipe is subjected to a suitable chemical treatment such as pickling, washing etc. to achieve an oxide-free outer and inner surface, which is well lubricated which will enable cold stretching without forming lines or marks on the material during the process.
Nå innføres strekkpunktet i den indre side av .Now the stretch point is introduced in the inner side of .
en enkeltholder som består av en sylindrisk blokk med en sentral åpning og som representerer tre soner, en sentral som får den endelige diameter eller profil av røret og har den adekvate form avhengig av profiltypen som skal oppnås. a single holder which consists of a cylindrical block with a central opening and which represents three zones, a central one which receives the final diameter or profile of the pipe and has the adequate shape depending on the type of profile to be obtained.
Den nevnte sone forangåes av en konisk eller pyramidisk be-holdersone, hvorigjennom den ytre overflate av røret formes inntil den når den sentrale sone nevnt ovenfor, som avgjør den endelige form og dimensjoner. The mentioned zone is preceded by a conical or pyramidal container zone, through which the outer surface of the tube is shaped until it reaches the central zone mentioned above, which determines its final shape and dimensions.
Samtidig innføres en spindel i den indre del av røret som er det verktøy som vill kalibrere den indre del av røret og bevirke dets rifling. Den nevnte spindel har tre soner, en sylindrisk diameter .er geværløpkalibret som er dets overflate relieffpreget med utspring anordnet skrueformet. Videre er den koniske beholder forenet med den tidligere nevnte ved dets mindre basis og en sylindrisk forstørring av den koniske beholders større basis. Spindelen kan enten være gjenget eller ikke eller festet til en.stang av større lengde enn røret som skal trekkes, idet det finner sted den ene an-ordning eller den andre, avhengig av kravene. At the same time, a spindle is introduced into the inner part of the tube, which is the tool that will calibrate the inner part of the tube and cause its knurling. The aforementioned spindle has three zones, a cylindrical diameter .is the rifle barrel caliber which is its surface embossed with protrusions arranged helically. Furthermore, the conical container is united with the previously mentioned one by its smaller base and a cylindrical enlargement of the larger base of the conical container. The spindle can either be threaded or not or attached to a rod of greater length than the pipe to be drawn, with one arrangement or the other taking place, depending on the requirements.
Når den er i denne stilling er det sterkt struk-kede strekkpunktet som stikker frem fra dens enkle holder ved hjelp av en strekkvogn som begynner å bevege seg og adskiller seg fra enkeltholderen og strekker med røret som deretter tvinges til å strømme mellom rommet mellom den ytre del av den konede del og den sylindriske del av enkeltholderen og av det indre av den konede del og den fremadragende. sylindriske del av spindelen. When in this position, the highly stretched stretch point protrudes from its single holder by means of a stretch carriage which begins to move and separates from the single holder and stretches with the pipe which is then forced to flow between the space between the outer part of the tapered part and the cylindrical part of the single holder and of the interior of the tapered part and the forward. cylindrical part of the spindle.
Da det er en reduksjon i diameter og tykkelse, vil materialstrømmen mot den indre del av spindelens utragende del og As there is a reduction in diameter and thickness, the material flow will towards the inner part of the protruding part of the spindle and
på grunn av deres helning bevirker dreining av spindelen som,due to their inclination, rotation of the spindle causes which,
i tilfellet den er festet til en stang, bevirker dets dreining og er dets fri ende. in the case it is attached to a rod, causes its rotation and is its free end.
Når hele røret har passert, avsluttes strekking-og riflingsoperasjonene og røret foreligger nøyaktig i det ønskede mål og .med en indre rifling. When the entire pipe has passed, the stretching and knurling operations are finished and the pipe is exactly the desired size and with an internal knurling.
Det kan oppnås riflede rør ved fremgangsmåten med dimensjoner fra 6,5 til 50 mm eller mer, med en spordybde som går fra 0,05 til 0,3 mm og en stigning av variabel skrue med den rette diameter for alltid å oppnå en returnerbar skrue. Knurled tubes can be obtained by the method with dimensions from 6.5 to 50 mm or more, with a groove depth ranging from 0.05 to 0.3 mm and a pitch of variable screw with the right diameter to always obtain a returnable screw .
Antall spor vanligvis anvendt er 4 eller 6 enskjønt som tidligere omtalt er det ingen begrensning flere eller mindre i fremgangsmåten, idet det oppnås rør med 4, 6, 8, 10, 12 eller flere spor hvis nødvendig. The number of tracks usually used is 4 or 6, although as mentioned earlier there is no restriction more or less in the method, as pipes with 4, 6, 8, 10, 12 or more tracks are obtained if necessary.
Fordelen med foreliggende oppfinnelse fremgår av det overnevnte, imidlertid - skal det påpekes at fremgangsmåten gir en mere nøyaktig indre ruhet enn ved andre fremgangsmåter, ingen konisitet i røret, en nøyaktig profil av sporet såvel som å være materialbesparende da det utelukkes unøyaktig drift. The advantage of the present invention is evident from the above, however - it should be pointed out that the method provides a more accurate internal roughness than with other methods, no taper in the pipe, an accurate profile of the groove as well as being material-saving as it excludes inaccurate operation.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES448624A ES448624A1 (en) | 1976-06-07 | 1976-06-07 | Method of fabricating steel pipe for gun body having at its inner surface spiral groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO771966L true NO771966L (en) | 1977-12-08 |
Family
ID=8471708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO771966A NO771966L (en) | 1976-06-07 | 1977-06-06 | PROCEDURES FOR MANUFACTURING STRENGTHS FOR RELEASE SCREW SHAPED IN THE INTERIOR PART |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS52150363A (en) |
| AR (1) | AR220678A1 (en) |
| AT (1) | AT364593B (en) |
| BE (1) | BE855458A (en) |
| BR (1) | BR7703699A (en) |
| CH (1) | CH620378A5 (en) |
| DD (1) | DD132299A5 (en) |
| DE (1) | DE2724195A1 (en) |
| DK (1) | DK248977A (en) |
| ES (1) | ES448624A1 (en) |
| FR (1) | FR2354155A1 (en) |
| IT (1) | IT1078882B (en) |
| NL (1) | NL7706197A (en) |
| NO (1) | NO771966L (en) |
| PL (1) | PL198702A1 (en) |
| SE (1) | SE7706487L (en) |
| ZA (1) | ZA773422B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4854148A (en) * | 1987-06-19 | 1989-08-08 | The Babcock & Wilcox Company | Cold drawing technique and apparatus for forming internally grooved tubes |
| CN110576066A (en) * | 2018-06-10 | 2019-12-17 | 江苏君睿智能制造有限公司 | A cold-drawn turntable for steel pipes |
| CN111842517A (en) * | 2020-07-24 | 2020-10-30 | 浙江久立特材科技股份有限公司 | Cold drawing die for ribbed cladding tube, production process and finished tube thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR518136A (en) * | 1918-03-27 | 1921-05-19 | Ternitzer Stahl Und Eisenwerke | Method and device for obtaining scratches in tubes |
| US2104319A (en) * | 1934-02-10 | 1938-01-04 | Remington Arms Co Inc | Manufacture of rifled tubes |
| DE950362C (en) * | 1940-01-16 | 1956-10-11 | Benteler Werke Ag | Process for the production of twist tubes of firearms provided with helical trains and which can be shot at without post-processing |
| DE768148C (en) * | 1941-12-28 | 1958-07-03 | Gustav Appel Maschinenfabrik | Process for the production of a pipe with a polygonal constant or narrowing internal cross-section |
| FR1028353A (en) * | 1949-11-24 | 1953-05-21 | Oerlikon Buehrle Ag | Method of machining firearms tubes |
| US2852835A (en) * | 1954-04-29 | 1958-09-23 | Harvey Machine Co Inc | Apparatus for forming spiral projections in tubing |
| GB1202491A (en) * | 1967-03-15 | 1970-08-19 | Nippon Kokan Kk | A method and apparatus for forming internal helical ribbing in a metal tube |
| CH588311A5 (en) * | 1975-06-13 | 1977-05-31 | Jansen Ag | Helically grooved tool mfr. - by drawing between two-part tools having groove negative pattern to give continuous helix on tube |
-
1976
- 1976-06-07 ES ES448624A patent/ES448624A1/en not_active Expired
-
1977
- 1977-03-31 AR AR267895A patent/AR220678A1/en active
- 1977-05-24 CH CH637577A patent/CH620378A5/en not_active IP Right Cessation
- 1977-05-27 DE DE19772724195 patent/DE2724195A1/en active Pending
- 1977-05-27 JP JP6207677A patent/JPS52150363A/en active Pending
- 1977-06-01 FR FR7716667A patent/FR2354155A1/en active Pending
- 1977-06-01 IT IT49666/77A patent/IT1078882B/en active
- 1977-06-03 SE SE7706487A patent/SE7706487L/en unknown
- 1977-06-03 DD DD7700199295A patent/DD132299A5/en unknown
- 1977-06-06 DK DK248977A patent/DK248977A/en unknown
- 1977-06-06 NO NO771966A patent/NO771966L/en unknown
- 1977-06-06 NL NL7706197A patent/NL7706197A/en not_active Application Discontinuation
- 1977-06-07 BR BR7703699A patent/BR7703699A/en unknown
- 1977-06-07 PL PL19870277A patent/PL198702A1/en unknown
- 1977-06-07 ZA ZA00773422A patent/ZA773422B/en unknown
- 1977-06-07 BE BE178254A patent/BE855458A/en unknown
- 1977-06-07 AT AT0401377A patent/AT364593B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DD132299A5 (en) | 1978-09-20 |
| SE7706487L (en) | 1977-12-08 |
| ES448624A1 (en) | 1977-07-01 |
| NL7706197A (en) | 1977-12-09 |
| BE855458A (en) | 1977-10-03 |
| JPS52150363A (en) | 1977-12-14 |
| DK248977A (en) | 1977-12-08 |
| CH620378A5 (en) | 1980-11-28 |
| ATA401377A (en) | 1981-03-15 |
| IT1078882B (en) | 1985-05-08 |
| ZA773422B (en) | 1978-04-26 |
| AT364593B (en) | 1981-10-27 |
| FR2354155A1 (en) | 1978-01-06 |
| PL198702A1 (en) | 1978-01-30 |
| AR220678A1 (en) | 1980-11-28 |
| BR7703699A (en) | 1978-03-21 |
| DE2724195A1 (en) | 1977-12-22 |
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