DE1403692A1 - Chain saw made of steel links - Google Patents

Description

DR. Ing. ERNST MAIEH

PATENT EVENT

MUNICH 22

TFIDiNlIAYJtHSTR. 4. TKLKTON 22530

Λ 15Ä60 June 15, 1960

A 15760 //

SandTlkens Jernrerke Aktiebolag, Sandriken / Sweden Chain saw made of steel links

You invention can be seen on chain saws and Links for theee and on a process for the production of ■ oil chains and links »

The duration of the clay chain saws was duroh the improvement of the quality dt * steels, but also the links manufactured wtrdtn, extended of the still jLuaer difficulty due to the broken tone of the limbs on, for example, when the metal fatigues prematurely. The aim of the invention is to improve the ear smoke * duration, τφη chainsaws duroh increasing the resistance of the Links against the fatigue of the metal *

Another goal of the invention consists in Creating clay salvage limbs that will last long periods of normal use and normal wear and tear without significant damage Aurohhaiten.

80980 5/0122 BAD

Sporto ··· SdiramiMra Ba »Uwu · Paul Kqpff. Stuttgart ? 0DtdMat Stuttgart 7319 \ Tl «grammadr.M ..

Another aim of the invention is that Creation of chain saw links of increased strength A further aim of the invention is to create τοη chain saws with an increased service life · Sin more The aim of the invention is to create τοη chain saws, which are resistant to wear and tear and fatigue are.

Another aim of the invention is to » the aforementioned goals in a low cost environment, obligatory and to the different conditions of the Manufacture and use adaptable manner to achieve * A further object of the invention is Creation of τοη method and device fttr the Brichen of the goals mentioned goals · oils above and further «goal · emerge from the following detailed description in Connection old to the enclosed drawings »and swar seigern

. flg 1 is a side view of a rope of a warp • äge gemäsB a Ausftthrungsform ά · τ invention |

fig · 2 and 3 views τοη links the chain in flg. 1 in Ttrgröestrtta measure · tab}

flg. 4 a view 1 »section near the line 4-4 in fig · 1}

809805/0122

Fig. 5 is a sectional view of a member in Cut)

6 and 7 are echematic representations, the Apparatus and method for making those shown in FIG invention chain links}

Fig. Β is a partial section of a press molding chine Eur formation of the inventions Limbs, and

the

Fig. 9 is a partial view of a Preßmas chine / in Fig. 8 shown type.

The chain saw 2 shown for example in FIG. 1 has secondary links 4, drive links 6 and connecting links 6. The links are connected to one another by rivets 10 which are upset as shown in FIG. An exemplary embodiment of the Antriebsgliedee 6 is "2, which is provided with two rivet holes 12 · Similarly catfish the connection member 8, two for example, shown in FIG · 3 has" in Fig ietlöoher 14 Pas metal around each of the Nietlöoher 12 and 14 in the Links 6 and δ and around the similar holes in links 4 "has been subjected to the special inventive link-forming process to strengthen the link and make it resistant to normal fatigue from use and wear" shows, each of the holes 12 in the link 6 has an enlarged

BATH ORIGINAL 809805/0122

th part 16 at each of its ends, which in the in Flg. 6 shown »namely by pressing τοη Two steel balls 18 and 20 in the opposite find the loohes have been formed. The preserved hole shows a central cylindrical part 22 and two similar Indteile, whose funnel-shaped surfaces 16 through the balls 18 and 20 have been formed. Tuck funnel * shaped surfaces are shortened spherical sections or segment surfaces » i.e. each consists of a! part of a spherical surface swishing two parallel τοη in one another Spaced planes on one side of the median plane of the sphere.

During the formation of the metal for the production of this The metal is cut through the shortened spherical cut-off surfaces Kait deformation solidified and compacted and thus deformed, that the funnel-shaped layers of metal adjacent to these flattened properties in terms of improved The hardness and tensile strength of "That Metal" have the surface of the central hole 22 protrudes radially inward »is removed so that the local is back on its original pruning Equal diameter is brought to «Za more similar Catfish becomes the metal that is possible across the levels of the ureprtliqhen Page »dt · limb protrudes * - also removed. Dam Ioeh IS is widened and sunk in Aamer on every inde and at each end there arises "im liag or a" funnel-shaped

BAD OFJGlNAL

809805/0122

Layer of unsolidified steel »while the steel in the center of the hole remains in its original state. When machining the metal in the manner shown in fig. 6, these funnel-shaped parts were originally formed one behind the other beyond their respective inclined positions. However, at the point in time at which the processing forces stop, there is a "relaxation" or a "pulling back" to the situation in I ¹ Ig. 4 silted state takes place and remains a substantial compression of the funnel-shaped ropes surüok · Therefore, the finished Ctlied around the hole is stable »because the funnel-shaped ropes mentioned are sealed and have a considerable hardness and a relatively high tensile strength · In this embodiment, each of the funnel-shaped ropes curved in the radial plane or kuppelförmif "" it that a high strength beeitst "without any part of the metal an excessive voltage is ausgesetst. Jtxntr each of the funnel-shaped parts exactly circular, so that the forces gleiohmftssig distributed SIMD uad the funnel-shaped · "Feil · in the axial direction Tom, the middle part of the limb has a sunshmenden half ·· eer · Therefore," when 4er Iiet 10 which is in the Looh "forces on" as "Lied transmits" 41 ··· forces through the hardened funnel-shaped feil · As Bad · de · Loches added »with some of these forces acting on the neighboring central part · 4ea eggs are distributed · If one of these funnel-shaped feil · ämsserea forces is exposed to »which smr Irmü-

809805/0122

can lead, the external forces become about duroh the forces attenuated and absorbed "which keep the funnel-shaped rope" under compressive stress "This means 4m · Blows and other forces and stresses at least partially » wise by absorbing the compression - or pressure forces are absorbed, which ia the funnel-shaped parts rorhanden are. Sa · chain link has therefore «increased · strength. In this way, the funnel-shaped · »rope« against the · 1 & · Anti-fatigue effects that may not occur would. Strength tests have shown that «invention ·· All treated in accordance with "fatigue" or permanent firmness Achieve that is slightly higher than that of untreated the limbs "what does" mean that the fatigue · - or permanent strength practical is double.

£ · was mentioned in the Toranet »because ·· the limbs with * • each other during rents 10 (? Ig «4) are linked. Si · shown Rent 10 have a central expanded part 30 on, the narrow version ia one of the solder holes 12 in one Drive member 6 is sitting. This extended middle section should be followed »Wei lietteile 32» 34 from, deviate duroh the lietlöoher 14 in the limbs 8 and the similar hie ti ocher 36 in the d «rn 4 hiadurohragen« Jed ·· d * r iietlöoher 14 w »iet · 1η · Sj- * lindrieche surface 38 and funnel-shaped end surfaces 40 and 4t on each of the 42 has essentially the Torah and dimensions, the 16 of the all 6, true * dl «Tlttoaen 40 weeentlioh wider eimd.

BAD QWW- · ■ 80 9 80 5/0122

Driving of the upsetting of the rivet parts 32 extended • tan this in adaptation to the Fora of Nietlochee 14 "so that i ny of the surfaces 38, 40 and 42 with a bearing surface • jr. liet is provided · Pie forces and 3pannungsWirkungen therefore "wipe β the member and transfer the rigid cable 32 on all of these contact surfaces · Processing of Xetails adjacent to the surfaces 40 and 42 affords substantially the structural design as in Nietioch 12 in the element '6 as described above "with the exception that increased processing metal adjacent the head is of the β lietteils on the surface 40 of the member. As previously mentioned, the rivet holes 36 in the links 4 are identical to the rivet holes 14 in the links β and the metal forming gates and shapes are also similar.

It was mentioned in the above that the metalworking operation takes place in the metal around the rivet holes 12 of the link 6 in the manner shown in FIG. 6. This results in similar machining effects on the two loads. When carrying out the similar metal machining operations on links 4 and 8, however, only one metal shaping ball is used, as shown in FIG. The ball 20 is arranged below the link while a pressure plate 46 is moved downwards against the other side of the link. This work process flattens 40

BATH ORIGINAL 809805/0122

sucks, whereupon the ailed turned over and a similar one, however, less force to form the surface 42 is also limited will·

In accordance with the invention, let us see that the metal fora gates at both holes In each "limb to be executed at the same time" accordingly points "how in jig. 8 geselgt * an invention mower eat a fixed one Base plate 50 and a movable head $ 2, on which similar metalworking stamp units 54 and 56 arranged »Ind. The stamp unit 54 is through a rectangular block 58 is formed which has two openings into which two spherical punches 60 and 62 with “The unit 54 let rigid in a plate 64 arranged with a shaft part 66 consists of a piece "which extends through the floor of the ground plate 50 extends * The shaft 66 is surrounded by a strong spring 66, which the plate 64 in "liier deepening in the of the base plate 50. · The lower inde dos shaft Is provided with a thread and carries a lock nut 70 »« swift a sealing ring 72. On the side of the plate Is a Kell 74 clamped in »further a flat · Im der rloh» sustained flushing when seated through the shaft 66 «ate * · '· like the firming d «r spring 68 maeh listed below wire · WLe spherical punches 60 and v2 have been channeled through · ti ** Λ gesehmlert. On the had 64 we «« in «ieÄmaltea» (7

809805/0122

with a screw «69 stretched» so that a link is attached to the spherical punches substantially like that shown in FIG Catfish can be arrangedThe stamp unit 56 is identical to the stamp unit 54, which the ball * Föraigen stamps 80 and 82 which are in exact alignment with balls 60 and 62 there are «tone of each ball If a circular section is removed "so that it has a horizontal flat surface 64" this enables the Balls can be moved one after the other, as shown in Pig »6» without the risk of them touching one another « In the arrangement shown, the movable head 52 is provided with holes directly above the Kugelatempeln 60 and 62 located chain link pressed down. The force exerted here must be sufficient « to notify dex filled of the desired metalworking.

Xu Yig * 9 is a stamp unit 66 with metal be * work stacks 68 and 90 shown. You stamp unit » 88 and 90 are 1 "substantially cylindrical" shapes, however • inen laeen- or metalworking part 92 on »the In das lud · des lietioch · * protrudes and the roranging described Metal working process causes «The shaping of the Metal working flat the punch 88 and 90 is such » that the surfaces formed on the links have a konrcx or concavely rounded or truncated cone * -shaped shape mltf »divides will, lln aiied, can as in 71g. 5 shown at 94 »a

BAD ORiGiKAL

809805/0122

- ίο

Hole 96 and frustoconical surfaces 96 at the ends thereof have · This «surfaces 98 can escape from the corresponding holes in the links 4t 6 and 8, which are as described» are formed by spherical punches »distinguish · i.e., while all these surfaces are considered to be concave can, the flat Terkürste formed by the spherical punches are spherical sections * The hanging parts are adjacent The frustoconical surfaces 98, however, have a considerable compression and resistance to stresses which would otherwise result from the fatigue of the metal.

Another possibility of shaping the surfaces 98 is to "make them convex with the help of a" ylindriach punch rom the same rake knife as the hole and shape them with a concave protruding surface around the base part. This concave flange presses the band of the The hole has a convex rounded shape. The cylindrical rope of the punch ensures that »no metal protrudes beyond the planes of the original sides of the hole» so that no finished * machining is required after pressing «Si · length of this convex surface should be in the 1charichtun« of the hole 8 to 25 ^ f preferably fö to 20 ^ or more precisely 10 to \% of the SIk * ke de · GfIiede · amount "

The chain links should have a thickness of 1.2 to 1.9 mm "preferably" about 1.4 to 1.7 mm have "suitable

BAD Cv: 'ν ■ ^: 809805/0122

Diekenabuessungen are 1.47 mm and 1.6 on. When the hint ·! «Wipe the middle part of the funnel-shaped? Läohe and the axis of the hole is 30 to 65 ° »preferably about 45 °, the Sindring depth should be 0.15 to 0.35 am for links with a thickness of tone 1.4 to 1.7 stroke and preferably 0.18 up to 0 * 3 na, for example, 0.2 am. Relate to this measure Pay particular attention to the drive links · You other links may have co-edges »which are pressed in the same way are, since Jtdoeh the drive links to a greater extent fatigue fractures * as the other members are exposed to, should the looh edges of the drive links primarily pressed •a·

Regarding the pressure force it can be mentioned that for dlt usually Torkoumenden Xioohdur he chats tone 5 to 7 bub tin Kugeldurohmeeetr tone 6 to 14 * m and la general a compressive force το »1 to 4 t used« ground «oll. For example, ts fled for tinen Loohdurehaeseer tos 5 » to be advantageous, tinen Kugeldurehatsatr το »about 10 bub and a pressure on dlt ball from 1.5 to 5> 5 * vorsugswt1st 2 to 5 tons of Toreusehen · BtI higher or lower Print the life of the cable from the bine • Ehr hone fcebtnsdautrspltit is achieved if the aforementioned arenas are adhered to. The pressures should be used look to a hardness dtr aiieder τοη Ia d # r main thing IO to 97 looJcwell 0 · latürlioh can dtr tptlnale pressure for

809805/0122

deviating hardness values within the gate mentioned grenas Slightly fluctuating · If other degrees of hardness are used the pressure must be changed accordingly, when the highest possible strength is required

Links with NJeUöehern τοη 5 # 5 a «, dia on both Ends with a 10 mm ball with different pressure points Have been deformed, with a marginal be * laatung Ton 116 pounds 100 kg tested »Ba was found AaJ the south or permanence. Divide themselves accordingly dam on the ball for cold forming Aar! Seher frenzied pressure atark Terändera · Ea were the following Values armitteli

Load on the ball bai aar Load leading to breakage

r.it ».,. f _ft « «mi λ«. ΑΊ4 ** ··. weeheeleahl unter eich KaltTerroraiung aee vriieassi «.μ - λ -. ^ - ν. ^. _ *. «.._

Teranuernaer iiexaatung

when examining the limb *

1000 kg 15000

1500 kg 24000

2000 kg 84000

2500 kg »2000000

5000 kg 180000

The links are made of unalloyed "steel" aar made of la * yawed »steel, Aar Tor dam presses Aar limb parts hardened and if possible to a hardness Te * 4? until 5? Rockwell O, Tarxugsweiae 51 as 5 € Bookwell 0, Targütet tat · S & esea

BATH C "· - λ

809805/0122

Hardness and tempering must not eat away at the limbs Torgtnommen because the compressive stresses in the main Terso winds when the pressed links of a hardening and TergUtu & g treatment. Xn fig »4 der Drawings have the links a Dioke τοη 1.5 am, the Holes 14 and 36 have a diameter of 3.5 mm and the holes 12 a reading through he τοη 5 »5 mm · The other dimensions in this figure have corresponding dimensions ι tab.

An example of the steel in the cold-hardened osw * kaltrerforaten members can be mentioned

0.55 to 0.95 * 0, 0.10 to 0.40 * Si, up to 0.5 * »ailatl 0.030 * P, maximum 0.020 S, up to 0.20 * Or and 0.7 * Vl, Best essentially iron.

ils Btlspitl times Ohromstahls for kaitrtrfestig-fet Drive links and other links in a chainsaw can be imagined

Up to «u 0.50 * O, up to 0.40 * 81, up to 0.80 * Mn, 12 to 20 * Or _t rest in the wtsentllohen Bisen ·

Iti the embodiments shown in Figures 1 to 4 of the inventive members, which are produced by the Terwendumg rom Imgelsteapelm (see 'ig * 6, 7 and 0), the diameter of the balletuapel is about the same as that of the Iletloohes and 1st door pull • t mm 50) 1 to 100 * larger than the hole. The use of the camouflage Kagelsttmpelm Tom lesser Darohmeseer results in funnel-

809805/0122 BADC - "-" ^ -

shaped pia above, which has a smaller angle with the Lo cha cha β have »while using ron Eugeletempeln clay gruseerea Diameter results in funnel-shaped surfaces that have a large Include its angle with the hole ahee. This means, dft »· each of the smaller Xugel stamps has the slope, deep? to penetrate the hole »in what way the differences fall «Wipe the largest and the smallest diameter * of the received funnel-shaped area are less, while each of the larger Xugel stamp penetrates less deeply »so that · β greater difference «between the largest and the smallest Diameter of the funnel-shaped area is obtained The Sin * penetration depth should 8 bi · 25 # Toraugsweis «10 bi · 2OJi or more precisely 10 to 155 * the bead of the limb is the radial Xr step kung «oll also · mainly lie in these Greneen ·

In the case of the in fig. 5, the frustoconical "r" shaped flange 98 has an angle τοη 42 ° with the iochaohe ·. The angle mentioned should be in the range of 40 ° to 55 °. Very satisfactory results, however, were obtained when this angle is in the range of between 30 ° and 65 °. In general, it was found that similar ! • Rich inside the ·· angle «« between the Vietloohaoh ·· and the main plane of the funnel-shaped surface, which is formed by the lugeletempel »ie the wink ·! "Wiaehea the Loehaehee and a tangential line to the putty" through eiaea Kugelstemf "! formed funnel-shaped · »fläohe.

BAD CΓ ^; : - :. · 809805/0122

Bit invention is not limited to those shown and described execution forms * limited »but can within Your »framework will be subject to changes made to it ·

Claim t

6AD ΟΛ <· 809805/0122

Claims (1)

PATEHTAIS PROPOSALS 1. Ketteage au "steel links, ron each having ewei lietlöcher, ixt which TiOH rivets are" what or all the members rerbinden together daduroh marked in "eiehneti date some lietlöoher at one sin or at both ends eo kaltrerfeatigt bsw · kaltTerformt which have the kaltverfeatigten · edges funnel-shaped Ilftohen "τοη each" in "depth ro» B 25 £ ice thickness dts (tlledes has, egg wot the metal adjacent the triohterförmigen lläohen under constant internal compressive stresses is. 2 · Ctttsäge according to Anepruoh 1 »daduroh known« eiohnet »that only dl · lietlöoher a% r drive links cold-terfeatiert • Lad and triohter-shaped end surfaces with permanent inner Druokepanniingen in the neighboring metal. 5 · lette would be known according to one of the insprttohs t and 2 $ daduroh that the depth of the triohter-shaped flee »1 · 20jt, \ orBugeweiie 10 to 15 * of the mole · of the fiUiedee is deceptive · Gad 809805/0122 * 17 - 4 · would be close to one of the anaproups 1 to 3, thereby it is known that the funnel-shaped surface is radial Kit extends 8 to 25 ^ the thickness of the dta limb * 5 · lathe saw according to claim 4, characterized in that the dl «funnel-shaped · Piaohe extends radially with up to 20 * _{for the} orsttgswelse 10 to 15 ^, the bead of the link. i. Lathe bed according to one of Claims 1 to 5, characterized in that the funnel-shaped surface is concave on the inside Cross section has " 7. It would be after one of the tests 1 to "5" characterized in that the funnel-shaped surface is frustoconical let and has a straight cross-section. 8 · lathe according to one of claims «1 to 5» thereby characterized in that the funnel-shaped surface has a Kon-Texen Quereohnitt has 9 ·, ketteage according to speeches 6 to 8, thereby ge ~ knows that the angle "between the hole" and "dsr "drip-shaped surface is 30 * to« 5 °, the angle ο sit * «ä curved surfaces after testing 6 and 8 as "" Äitte * part «he flee is measured» ° 10 · lette would be close to address 9 »thereby knowing without, The atv angle between the axis of the Looh and the funnel-shaped surface is about 45 °. 'bad OR! G! i ". ^f 11. A process <for preparing ron Kettsägen au "Steel * divided" sound which each two Hietlöcher having, in which rents are arranged "which lohnet the members bind to one another rer, characterized gekenne", that some or all members to dam hardening and forsugsweise NaOH of the tempering at one · * or at both ends, the soldering holes are ao kaitrerfeatigt, that ·· dl · kait · hardened edges on funnel-like surfaces «· have» clay which each «has a depth of 8 to 251 · the oiled dioke * whereby through dl · X-age strengthening In that »metal remains adjacent to the funnel-shaped surfaces« internal compressive stresses are created. 12 · Terfabren according to claim 11, characterized in that the cold work hardening takes place by pressing in a punch along the neck of the neck against the opening of the hole, whereby
the stack has a shape corresponding to the desired funnel-shaped surface * 13 · Method according to one of claims 11 and 12 »thereby known “wages” that soon ends “Ines loche” will be pressed simultaneously. 14 ·! Learn about "the claim" 11 to 13, characterized by the fact that soon there will be "holes" in the link on the same side
be pressed. 15 "Procedure according to claim 12" daduxeh marked, AaJ dl · a ^ eapelfläohe, which is in contact with the Loohkaate 809805/0 122 bad OF ^ MAt comes spherical * 16. Proceed according to. Claim 15 »characterized in that da ·· the radius of the spherical surface around 50 $ KU 200) 6 is larger than the radius of the hole. 17 · Driving according to one of claims 12 to 16, characterized identified »that the punch has a cylindrical front part γόη essentially the same diameter as the Has a hole " 809805/0122