EP0061184B1 - Verfahren zur Herstellung von Nähmaschinennadeln - Google Patents

Verfahren zur Herstellung von Nähmaschinennadeln Download PDF

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Publication number
EP0061184B1
EP0061184B1 EP82102324A EP82102324A EP0061184B1 EP 0061184 B1 EP0061184 B1 EP 0061184B1 EP 82102324 A EP82102324 A EP 82102324A EP 82102324 A EP82102324 A EP 82102324A EP 0061184 B1 EP0061184 B1 EP 0061184B1
Authority
EP
European Patent Office
Prior art keywords
needle
section
stamping
tip
eye
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
Application number
EP82102324A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0061184A2 (de
EP0061184A3 (en
Inventor
Klaus Pavel
Horst Lange
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rhein-Nadel Maschinennadel GmbH
Original Assignee
Rhein-Nadel Maschinennadel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19813150673 external-priority patent/DE3150673C2/de
Priority claimed from DE19823201285 external-priority patent/DE3201285C2/de
Priority claimed from DE19823207167 external-priority patent/DE3207167C2/de
Application filed by Rhein-Nadel Maschinennadel GmbH filed Critical Rhein-Nadel Maschinennadel GmbH
Priority to AT82102324T priority Critical patent/ATE13824T1/de
Publication of EP0061184A2 publication Critical patent/EP0061184A2/de
Publication of EP0061184A3 publication Critical patent/EP0061184A3/de
Application granted granted Critical
Publication of EP0061184B1 publication Critical patent/EP0061184B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G1/00—Making needles used for performing operations
    • B21G1/02—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G1/00—Making needles used for performing operations
    • B21G1/02—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls
    • B21G1/04—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls of needles specially adapted for use in machines or tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49792—Dividing through modified portion

Definitions

  • the object of the invention is to provide an optimal needle manufacturing method which manages with a simple tool with only a fraction of the stroke distance and thus achieves a high degree of economy.
  • the blank for sewing machine needle manufacture is formed by a wire section A cut to length. This has a circular cross-section. Its diameter corresponds approximately to that of the cylindrical needle piston 1. Both ends of the wire section are chamfered at 1 '. The total length of this wire section A corresponds to the material requirement for the simultaneous production of two sewing machine needles.
  • This wire section A is placed in a pressing tool, the upper die with 2 and the lower die with 3 is designated. The tool is equipped in such a way that, in addition to punching the eye section ⁇ , the final needle shape is produced with a press stroke by reducing the cross-section.
  • the blank then has the usual flattening 4 in the area of its piston 1 and the adjoining truncated cone Appropriate approach 5. The latter merges into the needle shaft 6, which ends in a needle tip 7.
  • the usual fillet 6 ' is also taken into account on the piston side of the eye section.
  • the needle shaft 6 takes the form of a V-profile as a result of the simultaneous pressing in of a needle groove 8 extending from the shoulder 5 to the tip region.
  • the blank material displaced due to the reduction in cross-section and channel formation emerges through a tool gap Sp left on both sides between the upper and lower dies 2, 3.
  • the flat beards that form are designated by 9. Their width depends on the displacement volume. Less material is displaced in the area of the neck 5 than in the tip area.
  • the flat beards 9 bring a flat strip-like width enlargement of the blank which is advantageous for the next method step; it is many times larger in area and can therefore be gripped better and brought into the next tool station and centered there in position 10.
  • the blank is held on its flat beards 9 between the jaws of a separating device V.
  • the needle shaft 6 itself lies in a lower punch 11 with a perforated window 12.
  • the associated upper punch 13 has a punching projection 14.
  • the punching projection 14 runs from above into the centering groove 8 which is V-shaped in cross-section and rounded in its V-apex.
  • the two flat beards 9 are cut off at the same time, in the present case sheared off by the jaws of the separation device V then being carried along by the upper punch moving downward relative to the lower punch 11 which remains.
  • the corresponding time delay is achieved by switching on a free passage X between the upper punch 13 and the upper jaw of the separating device. Only when the two shoulders 15 located to the side of the punching projection, offset in height from it, step onto the corresponding shoulders 16 of the upper jaw of the separating device, are the jaws acting as scissors displaced in the sense of separating the flat beards 9.
  • the upper punch 13 can be held high by springs.
  • the springs are not shown in detail.
  • the ear edges can already be rounded.
  • the tip 7 After rounding the eye edges, the tip 7 takes on its final shape, either as a rounded tip or as a pointed tip. After finishing, the usual treatment phases follow, such as heat treatment, polishing, galvanizing and finally the final inspection.
  • the formation of two sewing machine needles is divided into a larger sequence of steps.
  • the pistons 1 are left or formed in a first station of a clock-controlled follow-up tool at the free ends of the wire section A.
  • the piston-forming end region is correspondingly provided with a flat 4 (FIG. 9).
  • a marking or indication of origin can already be made by means of embossing.
  • the blank reaches the second station from the first station in which the flattening 4 is produced (FIG. 10).
  • the compression molding takes place in such a way that the displaced material in the area of the extension 5 and the needle shaft 6 to be formed diverts into the joint between the upper and lower dies of the tool (not shown here).
  • the approach 5 has the shape of a truncated cone.
  • the wider base faces the piston 1.
  • the illustration in FIG. 10 already shows, as far as the extension 5 and shaft 6 are concerned, the final contour like a relief of the needles to be formed.
  • the diametrically rooted flat whiskers 9 allow the transversely convex lateral surfaces M of extension 5 and shaft 6 to stand between them.
  • the blank is now trimmed in the third station (FIG. 11).
  • the shaft 6 is given the cross-sectional shape according to FIG. 22.
  • the flat, vertical separating cut surfaces are pressed into a curve during channel pressing if this is provided in terms of shape (free spaces in the die).
  • the trimming is carried out in such a way that the flat whiskers 9 are removed or severed over a length section which corresponds approximately to that of the end length of the needle shaft 6, except for an intermediate section 9 'which is beyond the needle tips 7 to be formed.
  • two diametrically opposed wings F remain as material residue, which, like the previously formed mustaches 9, extend parallel to the flattening 4.
  • the remaining intermediate section 9 ' has the shape of a rectangular plate with the longer side oriented transversely to the blank axis. Its edge 9 "can be used to limit the stop.
  • the long needle groove 8, the eye portion ⁇ extending from the attachment 5 to the tip region, and the pre-pressing of the tip 7 to be formed are molded.
  • the shaft 6 of the sewing machine needle takes the shape shown in FIG. 23 shown truncated V-shaped cross-sectional shape. However, other cross-sectional shapes can also be achieved, round, square, polygon etc.
  • the needle groove 8 is symmetrical.
  • the V-tip like the V-leg ends, is convexly rounded.
  • the channel bottom on the other hand, has a concave shape rounding up, which essentially corresponds to the thread cross-section. Material is again displaced when pressing the eye section ⁇ and pre-pressing the needle tip.
  • wing-like projections 9 projecting sideways on both sides, which together have approximately the outline of a sound body of known stringed instruments, the larger belly section being directly adjacent to the remaining intermediate section 9', ie immediately adjoins this.
  • the tip-forming part of compression molding here consists in cutting off the tip area, starting from the general shaft diameter. This creates a roof-shaped, wedge-shaped bevel Sch, which slopes down on both sides to the level of the intermediate section 9 'which is also further flattened and remains. During this pressing process, the circular needle shaft section 6 "disappears there. The intermediate piece 9 'widens somewhat as a result.
  • the intermediate piece 9' which is now completely flattened, can have a fitting hole L as a centering aid or additional alignment aid for the edge edges 9" (FIG. 12, dot-dash line) Circle), which interacts with a dowel pin of the tool.
  • the so-called fillet 6 ′ which extends on the side of the needle shaft 6 opposite the needle groove 8, has already been pressed in the area of the eye area ⁇ .
  • This also includes the simultaneous formation of the short channel 17.
  • the eye itself is not yet perforated. It is only pre-embossed and already marked as a bottleneck with 10 in FIGS. 12 and 13 for easier understanding.
  • the depth of the embossings is indicated in FIG. 24 by the lines 10 ′ and 10 ′′ reproducing the embossing reason at this stage.
  • the hole in the eye 10 is only punched in the fifth station of the tool (FIG. 14).
  • the ear-forming area is completely pierced. This can be done extremely precisely, since the entire tip area can be positioned and held firmly by the remaining intermediate section 9 'of the flat beards 9 and also by the additional lugs 9 ".
  • the crosswise to the perforation direction on the side flanks of the Needle shaft standing approaches 9 '" practically form a kind of lateral stabilizing rib, which effectively prevent an unwanted change in shape in the area of the ear area.
  • the eye is lowered from one side of the needle (Fig. 15).
  • the sinking takes place from the other side. Sinking is to be understood as the so-called rounding of the edges R of the eye hole which have a sharp ridge.
  • This station (Fig. 17) is reserved for trimming the tip 7.
  • the tip is already flattened on both sides in the plane of the V-axis.
  • a flattening which is also roof-shaped or wedge-shaped is cut perpendicular to it.
  • the cutting lines are designated 7 '.
  • a kind of pyramid tip with a square outline or cross section is achieved.
  • the waste piece shown in FIG. 17, consisting of the intermediate piece 9 'and, if appropriate, the lugs 9 "', is shown in dash-dotted lines.
  • the intermediate product shown in FIGS. 2, 6 and 10, 21 has two lateral surfaces M of a core cross-section K (approximately shaft or shoulder cross-section) lying approximately in the nominal dimension of the needle shaft 6, mirror-inverted opposite one another, of which the laterally protruding flat whiskers 9 going out.
  • Their total material cross-section B1 and B2 corresponds to the difference between the piston cross-section Q (Fig. 19) and the core cross-section K.
  • the transverse displacement of the materials can be driven so far that practically 90% of the needle surface - distributed over the top and bottom of the blank - is available as a finished final shape through a press stroke.
  • the wings F ' are cut free so that they extend to form a stabilizing rib over the full length y of the extension 5 and to approximately the same extent over the initial length z of the needle shaft 6.
  • the length z corresponds approximately to twice the shaft diameter.
  • the back 18 of the wings F ' is convexly curved, in such a way that the greatest rib width is in the area of the angular groove K between the needle shaft 6 and the shoulder 5.
  • the curvature is even; the back ends merge into the shaft 6 or the piston 1 at an obtuse angle. This prevents any entanglement zones.
  • the area width or size of both wings F 'together corresponds approximately to the area dimension of the flat 4.
  • the thickness of the wings corresponds to approximately half the needle shaft diameter, but at least one third of this diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP82102324A 1981-03-25 1982-03-20 Verfahren zur Herstellung von Nähmaschinennadeln Expired EP0061184B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102324T ATE13824T1 (de) 1981-03-25 1982-03-20 Verfahren zur herstellung von naehmaschinennadeln.

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE3111632 1981-03-25
DE3111632 1981-03-25
DE19813150673 DE3150673C2 (de) 1981-12-21 1981-12-21 Nähmaschinennadel
DE3150673 1981-12-21
DE19823201285 DE3201285C2 (de) 1982-01-18 1982-01-18 Verfahren zum Formpressen des Kolbenabschnittes von Nähmaschinennadeln
DE3201285 1982-01-18
DE3207167 1982-02-27
DE19823207167 DE3207167C2 (de) 1981-03-25 1982-02-27 Verfahren zur Herstellung von Nähmaschinennadeln

Publications (3)

Publication Number Publication Date
EP0061184A2 EP0061184A2 (de) 1982-09-29
EP0061184A3 EP0061184A3 (en) 1983-06-22
EP0061184B1 true EP0061184B1 (de) 1985-06-19

Family

ID=27432652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102324A Expired EP0061184B1 (de) 1981-03-25 1982-03-20 Verfahren zur Herstellung von Nähmaschinennadeln

Country Status (9)

Country Link
US (1) US4524815A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0061184B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
KR (1) KR870001563B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8201667A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3264217D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
HK (1) HK28989A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IN (1) IN158281B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
MX (1) MX158661A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
PT (1) PT74645B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69220550T3 (de) * 1991-05-10 2004-11-18 Organ Needle Co. Ltd., Ueda Nähmaschinenadel und Herstellungsverfahren
US5447465A (en) * 1993-08-19 1995-09-05 United States Surgical Corporation Method of treating needle blanks
US6206755B1 (en) 1994-10-19 2001-03-27 United States Surgical Corporation Method and apparatus for making blunt needles
US5640874A (en) * 1995-06-02 1997-06-24 United States Surgical Corporation Progressive die/carrier apparatus and method of forming surgical needles and/or incision members
US5682940A (en) * 1996-01-23 1997-11-04 United States Surgical Corporation Method for forming curved, rectangular bodied needle blanks from tubular stock
BR8000707U (pt) 2000-03-24 2001-11-27 Singer Do Brasil Ind E Com Ltd Disposição introduzida em cabo de agulha demáquina de costura
US20050096594A1 (en) * 2002-04-30 2005-05-05 Doctor's Research Group, Incorporated Cannula arrangements
AU2008343845B2 (en) * 2007-12-26 2013-02-21 Cook Medical Technologies Llc Stent and method of making a stent
CN118403988B (zh) * 2024-06-25 2024-09-06 常州市朗轩斯精密机械有限公司 一种附带切口打磨功能的吻合器用钛钉加工切断装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1259982A (en) * 1913-04-25 1918-03-19 Edouard Heusch Apparatus for the manufacture of needles.
CH302627A (de) * 1952-09-11 1954-10-31 Sacerdoti Giorgio Verfahren zur Herstellung einer Maschinennadel und nach diesem Verfahren hergestellte Nadel.
DE1193006B (de) * 1962-03-13 1965-05-20 Zimmermann Fa Jos Verfahren zum Stampfen der Fadenfuehrungs-rinnen von Naehmaschinennadeln und Matrize zur Ausfuehrung des Verfahrens
GB1136020A (en) * 1966-05-19 1968-12-11 Zentrale Entwicklung Konstrukt Improvements in or relating to sewing machine needles
DE1952152B2 (de) * 1969-10-16 1975-08-21 Organ Hari K.K., Nagano (Japan) Verfahren zum Herstellen von Nähmaschinennadeln
US4037641A (en) * 1976-07-16 1977-07-26 The Singer Company Method of fabricating sewing machine needles

Also Published As

Publication number Publication date
PT74645A (de) 1982-04-01
EP0061184A2 (de) 1982-09-29
HK28989A (en) 1989-04-14
KR870001563B1 (ko) 1987-09-04
IN158281B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1986-10-11
MX158661A (es) 1989-02-23
EP0061184A3 (en) 1983-06-22
DE3264217D1 (en) 1985-07-25
KR830008757A (ko) 1983-12-14
BR8201667A (pt) 1983-02-16
US4524815A (en) 1985-06-25
PT74645B (de) 1983-09-14

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