DE1602521A1 - Process for deep drawing of essentially cylindrical objects from blanks as well as workpiece holder and drawing ring set for carrying out this process - Google Patents

Description

Nederlandse Organiaatie voor Toegepast- Natuurwetenechappelijk Qndermoek ten non c

behoeve ran Nijverheid, Handel en Terkeer 1602521

The Hague, Netherlands .

Procedure for jDefalehen von iss v / e3released lyllndriaehen objects from blanks as well as WerketUokhalter- and ZiehringeatE aur Dorchleitmig this procedure

The invention relates to “in processes with deep drawing of in essential Bylindriachen objects from Hohlingen as well a workpiece holder and Jüehringsat »for implementation this procedure

When drawing hollow bodies that are essentially cylindrical in shape, round workpieces are normally moved. Run out of blanks, which by stems from plates or Strip material have been made. By arranging the blanks in a predetermined scheme in the Panel-moving strip material is as low as possible Stansabfall aimed at, as «wipe the individual Blanks remain a material after the stanching process to waste material Blanks are then transferred to the running cutter eyes

009817/0264

BAD OfHGlNAL

and sucked into hollow bodies.

Such a deep drawing tool comes from a drawing tool and a drawing punch that goes directly into and through the circular bore dee Zishrings is insertable, the usually an annular workpiece holder arranged separately is, which in turn with constant or changeable rer force around the viewing stack against that of the drawer, worn blank is pressed. The pressing takes place at the beginning of the movement of the pulling temple and can so long 'last, until the foreign body is pulled and finished has been driven into the bore of the drawing line.

During deep drawing, there are already outside of the blank the diameter of the bore of the draw ring. Tensions of a separate type. When using a circular These forces are predominantly at all points over the entire circumference on a certain radius the same size, with the forces in the best case continue overall on a rotationally symmetrical path. Normally, however, this is after the deformation has started no longer the case.

The workpiece holder has a similar task Ensure deformation and displacement of the blank material and suppress wrinkling.

BATH

009817 / Öm "

With a constant pressure force, the kg / he exerts an axial load brucfc a.us _? which lies essentially parallel to the center line of the tool "so that as the blank is gradually drawn into the bore, the specific axial" compressive load with constant compressive force "increases ..

If the compressive force is not constant, the specific can axial pressure load kept constant or during the whole procedure according to a certain program be regulated. The course of the pressure force can according to the requirements of the materials of the blank being controlled. Numerous other factors must however, are also taken into account, for example the centric position of the round blank in relation to the drawing tool, the play, the solidification during deformation, di · deformation speed, the friction and the lubrication.

The movement of the drawing piece causes radial movements in the blank Pulling loads, di · the circumference of the circle on which they occur, are dependent and which are within certain ▼ must be within certain limits. When the pulling load the locally · material strength exceeds, can the blank will be torn; if the drawing tension is against it

-. ■ "- ■■■ - ■""-." BAD OWaU

■ .'._ ■ - 4

D0981T / 02Bi

au garing leb, there is no flow of material and the aageatrefcte leaning of the material into the Drilling is omitted.

Did the blank have a significantly larger diameter at the beginning of the drawing process? Basitst "the drilling of the drawing ring" begins. As a result of the radial drawing load, a tangent isle Drackbelaetoßg develop, which is reduced in the circumference, iodcoh yw on the same side, that a compression of the blank occurs in 4 these areas and this is slightly older . is and su tends to wrinkle. -:

The gap opening moA can be prevented by the chain holder and the axial orifice loading exercised by means of

As far as all loads and terforrotan ^ en could run rotationally symmetrically, vt.xm the material not ro since "", would be isotropic, and not selected bevtEreugire A basäSo. Axis the β em reason arises at a load distribution with irregular deformation, 'eo that this sucked cylindrical counterotcnd bev /. Body always has a vreilenfönaige edge with two or more similar "ears" on which the sucked cylinder

BATH

008117/0114

tel is much higher than the ones in between Place. In order to produce an object without a wavy edge, trimming is therefore necessary, which means that one of the second loss of material depending on the greetings of the "ears" connected is.

If from a material with pronounced directionality Structure, that is, with a clearly "predominant orientation, is assumed, this ©" ears " is often the cause of large material losses, which is why it is an object of the invention to overcome these difficulties. To better understand the Terms "structure" can be said to mean under a one A material with a structure is understood to have the properties of elongation in different directions, mainly in directions at right angles to each other can. In the case of sheet metal and strip material, this · property usually leads to shaped bodies », in which the "ears" are usually at an angle of about 45 ° offered rolling direction develop, but can Also reduce the angle to 30 °, in which case six instead of four "ears" are formed. Some attempts allow the respective properties of the material to be recognized without further ado.

bad crr: s:?:. v-

- 6 009817/0264

Another object of the invention is to achieve success Further material savings through the production of cylindrical bodies not using round ones Blanks, but those with more or less straight edges and more square or rectangular in advance Shape. In this case the punching is superfluous, rather, the bleo plates or strips can be sureoht-cut to form such blanks. Hleroei can avoid the normal stan waste and can on the goose stenching process as well as * the necessary Verkseuge are sold.

if in the best case the practically rectangular ones Blanks, from a sheet metal plate - bsv. «Strip material have been cut out »these are so embossed tea Often it is held that the> B wipe the ear fillings on the »wipe occurs in the corners of the lying areas, IKBt There is no better way to distribute material savings ersieleni but aalest if the business less etaric oriented is, in this case inoer can still be significant Advantages including material consumption and to relieve the Terarbeituag,

To guarantee a complete or partial Utilization of the advantages described above creates

BAü ^ it.wi.i ... ^

οοΜπ / om

the invention a method in which a round or not round and preventive weave a square or rectangular blank through a workpiece holder and one with this cooperating drawing ring ausätalichen is subjected to tangential bending stresses, the distributed according to a predetermined scheme Ubor circular arcs are, these largely distant zones compared to practically no deformation in the tangential direction have the zones in which a considerable deformation in tangential and consequently also in radial direction occurs.

In the case of ti ··· »procedure is beumfit«, deviating from the th »ojftl« oa wrtatiiiiitj — elirsohea Spannrverlttuf aag «str * bt m & by a · Üp« aa «agST« rsetit, in which the then raw material has its own Spaiurang- and the course of the deformation is compensated for by external means, so that a highly effective deformation scheme required in practice for the production of the desired object is established.

Door the implementation of the process according to the invention are «la In the iOrm avs precautionary measures Setstern's profiled drawing ring and «used in a correspondingly profiled workpiece holder, whereby jadooA Si ·

• BATHROOM 0R "i-3! MAL

before recording the thickness dos au processing blanks he {orderliohen gaps are carefully monitored.

In this «Sweek, the invention creates a workpiece holder, characterized by the fact that it is provided with a Aaiahl tob Kurrenetüeken, in which the Height of their active amen curses above the Grundf läohe dee Workpiece holder -70m outer circumference in the direction of his The central axis decreases and the planks of the planks extend from the outer wall in the direction of the central axis up to a diameter below extend, which is larger than the diameter at which the rounding for the bore of the drawing ring begins, that the drawing ring with one of the number of curve pieces is provided on the workpiece holder corresponding Ansahl of holder arms, the tops of the base of the Werketüokhalter and their flanks the flanks of the curve • ttteke correspond »while the eternal neighboring Halteraxmm lying sectors of the drawing rings ratlndest they are deeply recessed, like the height of the curve pieces Above the base of the workpiece holder on the same Dureheeeser amounts to.

run the respective flanks of the curve pieces and the holder arms parallel to each other and on the central axis of the Werkvtttekhalterere and the drawing ring and

"· BAD 0R: -

00 ·· 1Τ / 02 · 4

extend up to the circumference of circles with diameters on which the top of the holder arms In ignore the rounding of the hole in the drawing ring.

The planks of the curved piece © run in front of the EUgsweis © from top to bottom straight, while the 3? lank the suggestive of each other on each other on Arsia εη theirs; lowest point connected via gekyüiwate surfaces

To ensure the most exciting possible The way of working should be the connection or transition set®1 « len «wipe the shortcomings and the tops of the curve piece · as well as the hold he ana «» it should be rounded, weloh · see rom üafane in direction of the Hlttelaohae learn *

Voraugeweiae are the upper parts of the holder arms flat bsv. plan, while the effective areas of the Curved piece · form the rope with a single cone jacket. In this pail 1st the base area, auiWeloher the Zurvenetüoke rest, also a flat plane, while the surface of the sectors can form the part of a cone.

You do not necessarily need arms of the pull rings be an integral part of the draw ring eu, probe »

BAD OR "." 3Ü · ^ ³ -

009817/0214

kOmum Tielnehr be interchangeable, and swar either as complete arm star or ale sinselarne. Xa last mentioned ? all let it be possible to «wipe the holder ·» axeen formed angle to the material used in each case adapt. Of course, the same applies auoh for the curve piece de workpiece holder see below, pre-set, dai Kvrvenstueke nad Haltarame entapreohen each other.

The Halteraree and the Inrronetfloke can also be set up with others whose flanks are a different time compared to the Bamptrlehtvng dp r Halteruroe It sen «X · let gana generally, with Tereuenewerksevgen aaetaneombare Knrvenatüeke and keeper clocks for the ₉ Production is confined to the factory narrowing a concretion of old fixed Ealteramen xuA Kurrenstüoken is berorsngt. ,

An example of the finding is given below using the Drawings explained in more detail, which a blank on which different zones are indicated, as well as a .boTorsugte execution of a restaurant and of a pull ring, sometimes based on the invention of Teraneohaulicher ». Ss co-owner

- 'BAD C ^: 2 ::

- 11 009817/0264

Fig. 1 «a square laughing blank, on which one united Zones A, B and C are indicated,

Flg. 2 shows a perspective view on the underside of a workpiece holder according to the invention and

Tig. 3 is a top perspective view of a

the workpiece holder associated with the invention Pull rings

• -

When a square blank is processed between an essentially flat workpiece holder and a drawing ring, this blank is optionally shaped by a round drawing stack into a practically cylindrical hollow body, the cylinder jacket of which has points from the corners of the blanks. If a hollow body bit is sucked out of a round blank with the help of this workpiece holder and the pulling ring with the dashed line drawn in on the square blank, this body does not have the hollow body mentioned above, but rather has "Ohrea ^N b «w. approaches which have their origin in the respective joint of the blank. In order to produce a flawless object, the upper edge of the cylinder surface is then trimmed in both cases,

BATH

whereby the tips generate a greater loss of material than the "ears". The profit from the tips Material loss, however, is home to punching out the Round blanks from the square already accrued, so that in both cases approximately the same HaterlalTerluat occurs.

In the case of a square blank 1 according to FIG. 1, which is to be sucked in a hollow body like a cylinder, we can distinguish between zones A and B below. Zone A runs τοη a central part C lying within a circle in the direction of a vertex, while zone B runs towards the middle of a rare edge. The material of the zone A widening in the direction of the central part 0 should only flow in radial direction, while the material of zone B compacted in the tangential direction baw. should be ausammengepreet _v so DAFL • a RadielfluÄ increased. At the In Pig. In the example given in FIG. 1, a zone A covers about 60 ° of the circumference of the central point C and the zone B extends over about 30 °. In general, the diameter of the central part C is somewhat larger than the diameter of the bore of the drawing ring, corresponding to the enlargement of the roundings in the red line on the drawing ring bore, and is about 1/3 of that

Blank surface.

BATHROOM ϋ'ίΊ5.

- 13 009817/0264

the highest possible side wall of the aylinüriaohen * Hollow body asu. achieve, it is desirable dad the The surface of zone A corresponds to the size of its circular arc Middle part C is proportional, i.e. in the present case aia zone A should be about twice as large as zone B.

The proportions of zones A and B as well as the Direction of the iron line »wipe them hang however Find the size of the raw material the raw surface, the material thickness and the grain of the wood of the drawing dies,.

To achieve the desired goal vivd. AaawmX worked towards preventing the occurrence of τοη Druokajwaamigen in the second A Vi and suppressing a “fiadlalanedehntjng aSgliohrk au. "·." · -. -

This can be done by using the Iüruekepamumgen in be compensated in the tangential direction, o AaS a tangential drawing stress remains and an expansion in radial direction is omitted.

Xn the Zona B, on the other hand, must be much higher than the normal compressive stress can be created, as there is a large radial extent is actually an order of magnitude.

BAD ORlQiMAL

-H-00Ι 17/02 4

For this reason, according to the invention, the blank is subjected to external bending loads a predetermined scheme over the scope τοη circles are awarded, with zones A mainly without Deformation in the tangential direction separated τοη the Zones B are loaded with large deformation in tangential direction and thus also in radial direction. the Points on the reraehiedtnen circle Uafangslinlen which this bending test should be applied, are indicated on the blank 1 by the dividing lines between the zones A and B. The lead stress is thereby created that the zones A are similar to a workpiece holder and a drawing ring under medium pressure in their own planes sum Hessen and the zones B Tor to and during the pulling on the blank plane over special edges of the Werkseug be bent. Since these edges are not radial, but rather according to the The dividing lines between zones A and B become tangential during the drawing process in zone A Pulling stress caused by the central axis widened, while in the zones B, which are pressed by the Werkseugkanten perpendicular eu these, a tangential · pressure load occurs which the material compressed to a considerable extent in the tangential direction hew. SUS pressed together and in this way a su-

009817/0264

BAD ORiGINAL - 15 -

brings about sätsliohe expansion in the radial direction.

The extension of the tangential ^{width of the z} one A is a measure of the coapeneation of the tangential loads hew. Tensions and depends on the structure, the size and the thickness of the blank and the durometer of the drawing die from which the body is to be sucked. If the surface of the central part C is small compared to the total area of the blank, the dividing lines of the zone A can run almost parallel to one another, if, on the other hand, the central part C is large, the zone A also tapers to a greater extent. In this case, zone B is pressed to a much greater extent and the bending takes place with greater force if the separation of ^ ds @ ä © && οά © qMgb zones is to remain effective during the deformation.

For the implementation of the method according to the invention, the following can be based on a be before projected Ausführungsbeieplels must be used.

According to FIG. 2, the workpiece holder 2 has a bore around, which can be durohsetst from a drawing punch, not shown, a flat bsw. flat base 4 on. On the base 4 there are four curved pieces}

009817/0264

Birir, lrb # It β surfaces 6 are provided, the effective "** 7" ina part of a conical cuibele old onev Spits "which lies on the Hittslaehee of the restaurant holder near" the bore 5. The height of the curve section 6 above the Ortmdf would be 4 alant gleiohattSig rom circumference · * · · «bucket an icle ines stock Tim the Bohreng 5 distant place

Zvisohen the curve ttioken 6 «lad AuenehiraBgen bsw; Vuten β »« «formed f the see eur Bohrtm« 5 hl »expand, each under aneal Vinkel τοη 90 ° sueinamder enordered Bind UQ (I on the one hand by the base 4 and on the other hand the. Lotreohten? Laaken 9 of the course 6 are determined. The plumbing 9 of the curve piece 6 stand on the base 4 and run in a straight line at an outlet point

the effective surfaces 7 au ahgeirondet, wherein <5sr Iruioaungsvon der Spitse sub üinfaxvg hin eunl & s & t.

According to Fig. 3, a devi Werkstüfkhplter 2 disordered drawing 3 is ainer Kogelmantel.fläohe 11 and a hole 12, .The larger than the hole 5 is provided. Di · Spit * «» θ- * legelosstels llf ^ t on the smock neck of the Boh- mrng% 2 _t jedbeh «" ^ iiiaXo dieaer. D * £ Bpltsemwislcel eW Kegels eatepriobt the one who works «* ·» Jllaliesi t A * f

BATH ORIGINAL

- 17 -

009817/0264

Verkstüokhalterers 2. Four holding areas 13 protrude in the form of the Arae eiaos Seosterns Above the surface of the cone 11, wherein the tops 14 of the Haltersrae father a right Angle on the central axis of the hole 12 lie "

The Hau? T-> 7erlauf8richtimgea correspond to the Salt er ame 13 those of the hats 8, so that the holder "" falls as well See also angle το »90 ° laying down».

The upper sides 14 extend to the circumference of the circle 15, ■ at which the Abmndvag stir bore 12 Ua begins.

The · cheerful »· 13 wise» flemkea IC mat, deres Ktho g «cem-But the daewieohenliegesjde« sectors of the & egelaantelfl & che 11 γόη of a Penkt la dor VHho Ass Kreiensjfeags 15 mm so that they are perpendicular to the top 14. .

The transition points between the flakes 16 and the upper sides f4 are rounded on the door, the curvature of which radii 17 are larger than the door. Bio Ealterarao 13 bositsen one of the size of the hats 8 corresponding OrSso _# are vm sdndosteaa ta * double dor Dioie dos su processing. Rohlings “beil ©” as ale

009817 / 026A

Ntreen. From this ßruüia the l & ags are a straight line n FIeaken 16 ε >> heia & chfeax'fcen Haltfti? a, Ym «a through 13 interconnected beef rejuvenate oak

»Shares peaks, like the · at the» flanks of the lurrenßtttck » 6 who? «11 is.

AmT j * w "ila the same DoreluMaeern rae" a di "

with over Als d «ewi» oh * »liee« wd «n sectors office

11 upwards the Ktonraetttek 6 ülmr Die GruadflKehe 4 de · workpiece holder · 2 Mmmeregen, da which duroh the sales holder ao »gettbt · Sruokkraft ea dleeen Stellen grSfier «an aod al · ev / ieohea dea Halterareen 13 and the butene 8.. :

Under gowleaen circumstances, e · eepfehleaewert ea _v keiae fleohe, but a conical biw, conieohe örnadtllese 4, where "with the upper sides 14 then flat or also · konieoh" know. In this case it is only, that the vertical distance is used "wipe the base and the top sides tob Außonuafang aur Hlttelaoh ·· rerkleinert out en beginning _ dealt de · drawing process of epealfieehe Axlaldiruok in Have the AuQenuafangs greater iet as de in the closer deceived at the central axis areas" blanks. · ■■. . · .-

BAD Oa: -2: N

009817 / 026A

.. • -1-19 -

The flanks do not always need to be flat or parallel to the top surface of the workpiece holder "and the sieve ring", but know to be curved or to define an angle with respect to the central axis "and what _? that the holder arm 13 widen from the upper side 14, for example, towards the conical surface 11, while the grooves 8 narrow from the active surface 7 to the base 4. You minimum width at the gap bsw. The gap between the flanks of the curved piece and those of the holder arms corresponds to the material thickness of the blank, but this width is generally larger, since the main stresses caused by the tangential operational stress should in practice be able to reduce the tangential stresses to the desired level Compensate accordingly and separate the zones from each other, whereby these tensions must not be so great that the passage gap creates such a great resistance during the drawing process that the strength of the blank is exceeded in places and the blank becomes aerosolous. For this reason, the redien of the curvatures 10 and 17 diminish susagunen bit the flunkenly in the direction of the dia ilittolachee, since otherfulls excessive Spenuungekunssontr & itionen at the points of the peak of the flanks 9 <i © 2? Kurveruttteke 6 and ls & near the KrUiamungen 18 on the Erilcn of the planks 16 on.

BAD 009817/0264 ·. ■■

step

XML · fox * a «workpiece holder * and« ins · Zlehrimge hangs eoalt ia one of the flieeeigensehaftan of the raw material and rage under the circumstances the surface of the ingots, the thickness of the ingotsaeteriala and take off your die-cut throat,

The workpiece holder and the counter Described execution forms of the Srflndumg work on in the manner described below.

An IT soft Oefttge cut-out from a sheet metal strip "square blank is old launched his Koken to the holder arms 13, the humming 6 of the Werkstfickhalters compress the zones B against the Kegelaantelfläche 11 while the zones A, wipe the base areas 4 and the tops of H are pinched . On this v / 6 iee, a higher social pressure is induced in zones B than in zones A and the tangential bending stress becomes, for example. -stress caused by the * transition points between the upper sides and the flanks on the! dividing lines «between the various zones. During the downward movement of the drawing die and the beginning of the borrowing into the bore 12, the blank experiences an "all" look

009817/0264. "'" · "

Yerkleineruag. In addition, the zcnea λ de "blanks are not pressed into shape by the widening of the cheerful ones *" in directional tangential toaeaa *, but rather slightly stretched "eo d & S they flow evenly over the rounded Iraia circumference 15 jpä , while the zones B checked through the Kurrehstcke € swiaehen the flanks of the neighboring, aufeisiea & er at the TerlauXenden Halterasee in tangentlaler Rie & tt§ng fs ^ r etark suaamiengepveftt hs «r. be condensed «You ·« «« rather strong compression could develop a column pattern, do not separate the apegifleehe aarial tension at this point larger and the aonat atSgllcherveioe appeared lüoht the folds over the rounded Xanten of the vertical bright seal, generally radial would be sucked away. ! kr * the final, forged cylindrical hollow body has upright wall panels originating from the original square shape of the blank, but binds the deeper parts that are noticeable to these sapphires; wctlohe τοη derive from the straight rare edges of the raw material, in the ./elee sucked up and formed, that after cutting to size a hollow body "it a" smooth edge can be obtained, de * toi about 30 <let as a norealeiveie mna a blank dertelfec "Ab * neseungen manufactured without iawendtm" de "invented uneft? Hollow body. The naoh dea

■ »22-

00II1T / 02 *

Hollow bodies made from peat ears Ongefohr the HoUe a «vesimtlieh from a blank Area of sucked hollow body · corresponds.

β in © a on lierkfioalloh e Veise from one 66 χ € 6 large blank with sucked hollow body

Height of about 40 rna aa the Splteaa and a miadoat of about 21 am. After cutting to sizea its edge, this hollow body therefore reaches a maximum height of 21 raa. If the hollow body is sucked virö on a traditional vfeise of the round blank with 66 odd Ourohseeeer, there occurs a stanzabfall τοη 20% compared to the "^ uadratiechen Robll & g, whereby this waste can be kept lower when the round blanks in each other Tersetstea Scheme, for example similar triangles from which material strips are removed. Regardless of the cost of the Stanswarkaeugs, the Stansabfall corresponds to the cutting waste at the tips after dc "pulling the hollow body".

Venn contrast erfindunc- after: geaäßen method, a Bohl * body of a 66-χ 66 bob large blank is drawn, 1st the Üylindorwand au the Spitsen about 40 ■ "high, dooh is the Mindeothöle 29 mn, so dal constitute hollow bodies üb about 30ji Higher is ala a little near dam invented

BAD CR! S! NAL - 23 -

009117/0214

Yerfanren drawn hollow body, while the Stenewarkseuge superfluous a *. A hollow body old of the same n8Ue of 29 m can be obtained under application herktfosillohar? «Rfabren only * on a square! Or rua & ea blank ▼ on 74 - 75" ram size and with a siorsBelen congestion "or cutting waste of 20 £. The total parcels of material alone amount to 66 χ 66 aa compared to 74 χ 74 bb or about

In the TorangeheEden description vrarde Torauegeeetst, that the raw material has a consecutive fteftlge. Palle which does not apply to the material, for example as a result de · ualzene, a strong tendency towards "Ehren" -bIdling Owned, have two KBGUohkeiten. With a »Welegeftlge form a norsal white animal at an angle of about 4 ° «Nr Valxriehtong lying" ears ", while with others Materials that Bildvag τοη six "ears ** not selected" eohleseen let »·. . ■ ■. · ....

At Tervendimg rtmder blanks and if the possibility consists, the blanks in a certain alignment on the Apply Tlefsiehwerkseug, the invention offers the Ease of alignment of the blank on the drawing ring in such a way that the "ears" formation is beneficial. can be nutst. This can happen through AaG the

BAD OFK2 :: A

Haspt-Verlanferlchtimg d «r Haltererme and din the direction of ^{the 1 ObTeH 1} * are brought into supernaturation. ! Üatattobllch arafl in AiKsen VaIX that lying in the clay · "wipe the" ears ¹¹ · material is drawn in an apesial way in the radial direction, over an equal surface to su gö - »- ^K ® Mertorialflufi is brought about by compressing Tssw. Zu- • asaenpreesen diseer £ on <sn in taogentialer direction by the application of the "ia Spruehuag on the rersehledenen Zreie-Uafongslinien from "gettht, on lines Hagen, which littleetena lie parallel to the direction in which the" ears "form" order. lent aahr on the Hittelache · πα, but run parallel to each other in each holder; the same also applies to the blank pail-egg * that surrounds the hats if the angle is less than 45 °, the holder arsenic and the grooves should be at smaller angles than the one above the other. If so "ears ^{9 are} formed, the

around «I ^ * a eater · angles τοη 30 °, 90 ° b« w. 30 ° Welsriehtuag lie. Dwvoh application of deep procedures

'- BAD ORiQiNAL

009117/0264

«Ixd the possibility for« a material saving inbesng avf the Rohllngsdurohaesser offered, while the Stan · «· waste is unavoidable for the production of round blanks remain.

If non-round and Toreugeveiae square or right-angled blanks are made from a material that tends to form "ears", whereby the material losses occurring in "Stansen" are reduced or eliminated by the uninterrupted straight or interrupted Stansllnien. IKOt aioh also apply the invention. In this case, the "ear" formation is ausgenutet described in other Velse as above, however, the "Ohrenft formation is started at the points at which a eueätsliehe expansion bsw" stretching needed is "Here is it look vm the places where the distance to the middle part of the blank is the smallest, i.e. compared to the straight or near straight lines of the blank. In the direction of the diagonal lines connecting the opposite corners, only the normal material line appears in radial direction, while the material elongation occurs on the opposing Xanten from the formation as a result of the "ears" formation and the radial expansion or stretching susassm setst, which * by the through the sus. '. teliohe taagential «

BAD ORIGINA - 26 -

009817/026 *

1802121

Blegebeenslagung causes · tangential · direction Zusanacenpreaexing herrorgaruieö becomes. 3In this case, the points on which the load is exerted lie in front of the agenieio aui lines that run the world parallel to the horizontal line, so that the tangential width de? Zone A of the Rohli »i>» jeicht & we Mitt »lacboe out

if aieh dl "one an olive mv not symmetrical form of the gate members offered by dl" Erfindting know be exploited trotade "when the cross in the Halterarae and lurrenetüeke not eyametriaoh" he Haapt-Orientienmcariehtune aind arranged. In the case of an old "MWMduMlbarea Xurvenatflokaa" ad Halt or poor reraehenem fammotevarkMtif ka & n the riohti ^ e pore for the Heratelluae eiaes stressed hollow bodies «the eleventh ventilator VeJrketoff before the production of the plant vent. In this case, in addition to the τοη eiseai rectangular or near “square shaped blank” instead of a “square blank linc”, there is no need to add to the denial of the hollow from the “plate or strelf material” but actually contribute to the fact that there is no need for material can.

In the case of Bleehan's work on it auegeprl "tee O" fO "e

came a · Difficulty occur when the * Ohrarf * -Bil ~ not along or across the plate b «w. aura stripes

takes place, especially often, at an angle of 45 °. In this skin, the angular blanks should be cut out at an angle, for example lines also running at 45 ° / but there are cut losses at the edges of the lateral trench. If, however, the blanks are small compared to the dimensions of the tire, these losses are more than made up for by the tortelle offered by the method according to the invention; In the case of large blanks, the inclined cuts can result in even greater material losses _, so that in this case the advantages of utilizing the "ears" are negligible and the cutting out of the blanks again ends along a straight or interrupted line that runs mainly parallel to the edge of the strip pre-recorded "

The invention is also concerned with a method of sieving, mainly of cylindrical objects, such as raw lenses, in which sus & tslie bending stresses are exerted on the blank in accordance with the most predetermined scheme in order to ensure that the blanks are divided into villi, which are practically free i »tancexitialer Richton * s & nd _f and

BATH

00 ·· 1? / 02 · «

Zones _r which are subject to considerable deformation, generally in a tangential direction, with the method according to the invention compensating for cut losses at the corners of the blank or as a result of the structure of the blank matorial. In addition, the invention includes a counting piece provided with protruding holder arms in the shape of a sea shore and in the form of its five-year-old towering and ait the drawer rings compliant with the curves provided by the work gates and holding pieces of the board. Orranetttcke susätsliche Biegebeanaprnehungen on "inen blank and on τοηβ separate zones and supported by the holder arms out ▼ he" ■ bends, vobel this · zones practically free τοη any terforaung In tangential direction and τοη the zones are separated in the tangential direction gate shapeo.

Ba the Torahehend · teaching the production of syllndrian Objects made of square or rectangular Treated blanks, the self-erosion also lies Application of the tangential bending stress for the separation of certain zones of the blank on the manufacture τοη hollow bodies with rounded rectangular or square, elliptical or other cross-section within the scope of the invention. -.

ORIGlNAL BATHROOM • ■ · ..- .. - 29 -

Claims (1)

Claims 1. The method includes essentially cylindrical objects made from blanks, in which the blank is subjected to an axial compressive stress by a workpiece holder and a drawing ring that acts on it Thus, the subject is divided into circles over the circumference and zones which are practically free of any shape in the tangential direction, largely separate zones which are subjected to a considerable shape in tangential and radial reddening. 2. Farfehren according to claim 1, characterized in that Biegelicanepruchungen are carried out at points distant from each other on different trels-frames, in such a way that the width of the inner zone, which has a shape mainly in the narrow direction, to a greater extent than that of a zone without deformation in the tangential direction to rerkleinert a central part. BAD O? 8Q ^ 009817/0264 - 30 - 3. The method according to claim 1, characterized in that dafi on a larger diameter circle circumference greater bending stress is exerted on a circumference of smaller diameter. 4 * Method according to claim 1 for deep-drawing round blanks from one another. Material with a tendency to form "ears", characterized in that the additional bending stress is exerted on the various circumferential lines at points which lie largely parallel to the direction _r in which there is a tendency for "ears" to form. 5. The method according to claim 1 for deep drawing using non-round and preferably square or rectangular blanks, characterized in that the additional bending stress on the various Circumferential lines exercised in places which lie on lines largely parallel to the diagonal lines, so that the tangential Compression or compression occurs in the zones of the blank which adjoin the elongated or straight Adjacent parts of the blank. bath 009117/02 «* * ³¹ ~ 6 · Anapruoh method 5> characterized in that square blanks are made of a material old direction-oriented assembly can be used, such * that dl · "ears" formation along the straight edges dee Blanks takes place. 7 · Verkseugeats bsw. Werketüokhalt he and ZiehrtngsatB but the procedure was carried out according to one of the preceding Claims, characterized in that the drawing ring (3) is designed in the shape of a starfish and that the workpiece holder (2) taking into account the requirements for receiving the blank to be processed required spaces is formed complementary to the profile of the drawing ring. 8. Tool set according to claim 7 »characterized in that the workpiece holder (2) is provided with a number of curved pieces (6), in which-the height of your effective surfaces (7) above the base (4) of the workpiece holder (2) from The outer circumference decreases in the direction of its central axis and the flanks (9) of which extend from the outer circumference in the direction of the central axis to a diameter which is greater than the diameter _s at which the rounding to the bore (12) of the drawing ring (3) begins, that the draw ring BATH ORIGINAL - 32 009817/0264 (3) with one of the number τοη curve pieces (6) on Workpiece holder (2) corresponding number of holder arms (13) is provided, the upper sides (14) of the Base (4) of the workpiece holder (2) and their Plenken (16) the flanks (9) of the curve piece: «(6) correspond, while those between adjacent holding names (13) lying sectors of the drawing rings (3) »u-Bindest eo deeply recessed, vie dit height of the Curves «tucke (6) over the base (4-) of the workpiece holder · (2) is on the same diameter. 9 · tferkseugeats according to claim 8, characterized in that the flanks (9) of the curve (6) and the Balterexme (13) run parallel to each other and to the central axis of the workpiece holder · (2) and the pull ring (3) ▼ and extend up to zn ! Starting lines of circles extend with a diameter which is larger than the diameter at which the upper sides (14) of the holder arms (13) merge into the rounding (15) of the bore (12) of the drawing ring (3). 10. Tool set according to claim 8 or 9 »characterized in that that at the transition point between the Flanks (17) and the tops (14) of the holder arms as
(i3) / ier curve pieces (6) roundings (17) are provided are, which extend from the outer circumference in the direction of the Reduce the central axis. "^".,. BAD OL-ü-is 009M7 / 0264 - 33 - 11. Tool set according to one of claims 8, 9 or 10, characterized in that the flanks (9) of the curved pieces (6) run in a straight line to their lowest point and that the planks (16) of adjacent, holder arms (13) running towards one another are connected to one another at their lowest points by curvatures and » 12. Tool set according to one of claims 8 to 11, characterized characterized in that the tops (H) of the holder arms (13) as well as the base (4) of the workpiece holder ^ (2) are designed as flat surfaces, while the effective surfaces (7) of the curved parts (6) parts form a conical surface (11). 13. Werkitugeata naoh claim 8, characterized in that that four holder arms (13) and four curved pieces each (6) provided. 14. Tools according to spoke 13, characterized in that that the Haltθrann β (13). ·. of the drawing ring (3) against Holder arms with differently running flanks (16) and / or different main course directions are interchangeable and that the curve pieces · (6) of the workpiece holder (2) are correspondingly interchangeable. BATH 009817/026% Blank page