CS220323B2 - Spinning rotor of steel for open-end spinning machines - Google Patents

Abstract

A spinning rotor (1) made from steel (1a) for an open end spinning machine is provided with a thinwalled rotor wall (3) with a fibre collecting groove (4) and a locally limited, hardened zone (11) comprising the fibre collecting groove (4) at the largest inside diameter (B). Owing to the partial hardening of the rotor wall (3) high wear resistance is achieved for the fibre collecting groove (4) and the finished shape and roundness of the spinning rotor (1) made from unhardened steel (1a) for application on the open end spinning machine is maintained.

Description

The invention relates to a steel spinning rotor for loose-end spinning machines for producing staple fiber yarn, with a thin-walled rotor wall, provided at the largest internal diameter of the spinning rotor with a fiber collecting groove.

As is known, in the free-end rotor spinning, the filaments supplied to the spinning rotor are laid in the form of a fiber ring into a collecting groove, the spinning rotors rotating at a very high speed in order to achieve cost-effective production. high centrifugal forces. In the known spinning rotors of this type, the hot rotor body can be obtained after being made of steel and after alignment to the required circularity for direct use with free end spinning tools which, although made as thin-walled due to the high specific mass, under the action of said centrifugal forces. However, the non-hardened steel in the shape of a rotor does not have the necessary properties to prevent wear of the fiber collection groove. Due to the high centrifugal forces in the area of the fiber collecting groove, for example, due to foreign bodies in the fiber material or abrasive substances of chemical fibers, titanium oxide, the steel collecting in the fiber collecting groove occurs. This can lead to premature weakening of the rotor wall, tearing of the rotor and thus damage to the machine. However, the continuing wear in operation mainly alters the geometry of the fiber collection groove for spinning the desired yarn, so that the yarn quality suffers.

For this reason, spinning rotors made of non-hardened steel have not been used in practice in the production of yarns. Rather, aluminum spinning rotors having a shelf life or coating treated spinning rotors of approximately 5,000 operating hours were used, reducing wear, but could only increase their service life to about 10,000 operating hours. The use of the known spinning rotors therefore leads to their premature replacement on bearings which have not yet run out, which have a longer service life than the spinning rotors.

In the prior art, the use of a hardened steel insert in the base of the spinning rotor to avoid wear has the disadvantage that the insert made originally of non-hardened steel cannot be inserted into the steel body without hardening, which is known - the curvature of the steel, i.e. the deformation of the geometrical shape of the insert due to thermal stress during quenching, is to be attributed.

It is therefore an object of the present invention to provide a steel spinning rotor for a loose-end spinning machine of the aforementioned type, which does not have the disadvantages of prior art spinning rotors and which, although made of non-hardened steel, has a wear-resistant fiber collecting groove. and, irrespective of the operating time, is intended to maintain the geometric shape of the fiber collecting groove while providing an extended service life.

The principle of the solution according to the invention is in particular that the rotor wall is turbid in the restricted zone in which the collecting groove is located.

In the spinning rotor according to the invention, the locally limited turbidity of the thin wall of the rotor achieves that the collecting groove exhibits abrasion resistance which eliminates its functionally disturbing wear for approximately the life of the rotor bearing, which in practice can be achieved for example / min. up to 40,000 hours. As a result, the determined geometric shape required for spinning the desired yarn is retained for this time. Consequently, the spinning rotor according to the invention, produced with respect to a specific mass of steel with a low wall thickness, not only has the advantages of the strength of the steel itself, but exhibits at its greatest inner diameter, i.e. wear resistance such as in the known spinning rotors, for example, even laborious and costly thin wall coating cannot be achieved; if the coating becomes black at one point, the rotor becomes immediately unusable due to deep local corrosion and must be prematurely replaced against the rotor bearing. The spinning rotor according to the invention, on the other hand, has a service life which corresponds approximately to that of the rotor bearings used today, and is therefore approximately 5 to 10 times longer than the spinning rotors used hitherto. Therefore, there is no need to provide the new bearings with a new rotor and to rebalance the bearing unit. Rather, the bearing and rotor can be ordered as a balanced unit at the manufacturer and installed instead of the run-out unit without the need to return it to the manufacturer, coat the old rotor, and rebalance the unit. The spinning rotor unit according to the invention can be discarded by a spinning bearing in the case of a running-out bearing, since the difference between the expected life of the rotor and the bearing is not so large as to economically justify the replacement of one of these parts.

Local turbidity limited to the area of the fiber collecting groove prevents, in particular, the spinning rotor, especially its thin wall, from twisting or deforming during the quenching process, which would inevitably occur during quenching of the entire spinning rotor.

Therefore, it may be the spinning rotor is preferably made of non-hardened steel in the desired, after equalization roundness, i.e. balance and the final geometric shape к use the machine for spinning having a free end and may be the wall rotor in the ob ^l and ^STI největotoo vnttřmho ^p r ^of mer, with ^b obsahuμω Erno Ptech ^P ro vtakna, zatlena while at the ^DU SLE ^dk u mtetního turbidity remains zactován finished shape. In a mine there are only a limited zone of a different structure than the section c ^{Prada ¹H} the rotor ^{to the} now obsolete nelbyta modified ^quenchant, and ^{the Ter-line} process following provides abrasion resistance which ^created the en ^{d with} A ^to affect the shape of the rotor.

Zak ^l ene ^and the ^{zone LE} ICI napriWad between non ^k and ^l eným ^and otoastmi and / or to that I refer wall sp ^Procedure c ^¹H the rotor meters ^can have Nem ^of nnou Houdka of walls ^compounding m ^from m ^already e ^b YT achieved uniform heat distribution during quenching and thus uniform turbidity without distorting the spinning rotor.

Hardening zone or the spinning rotor ^also possible ^{h b} ou ^yt inside and ^/ No ^{b e p} a hv ovtečeny RESTRAINT Protti no rusting ^ ^šk sobícrn ^of the ^dwell in the ^pickle to enní material during the spinning for example galvanized.

The invention is in the other embodiments described in detail in the following description and drawings ^kd e oto. 1 ^PR represents a diagram of the spinning rotor made of steel for a machine for spinning having a free end in section, FIG. 2 vol ^ETS Eny potoed to ^part with ^p řádací ^H of the rotor after ^dL e above ^of cut A o ^b r. 1 and Fig. 3 is a diagram of another ^H performs spMdatího steel for rotor spinning machine having a free end in section.

The spinning rotor ¹ of nekatoim steel for a machine for spinning having a free end, the base body 2 and the rotor wall 3 having inside the spinning rotor 1 the collecting groove for the fibers in the V-shape with an angle and opening pnbližně ³ 0 and ^f toOý toorenou two ^E has arms 5 and 5a, contiguous. under ^ú hlem and in place of the largest inner ^ětšíh r ^{p s p} s B mers řádacího rotor 1 forms a leg 5a of the rotor wall 3, first, together with the main body 2 of the bottom ^{wall 6} and ^{the d} at once ^to an aqueous ^{5 m} shoulders edge ^{7 of} unilaterally open spinning rotor 1. the spinning rotor 1 'is coaxially mounted on a shaft 8, which is set into a rotary motion. 4 into a collecting groove for the fiber provided with a base of radius R 4b, which may range from 0.1 to 2 mm, at the front by ⁱ ^ ^kl Adaja edtime loosened vtekna in toaru vtakennébío ^p rstence 9, wherein ^A is about ^dt Aho ^á to shape for ^the yarn roucené 10 - Fig. 2. Due to the high specific weight of steel, the rotor wall 3 ye ^t a ^of the ENA ^{characterized} sok ^s speed with ^Prada acího ^CKY. Rotor 1, which generally reaches more than 40,000 rpm, as thin-walled, with unchanged thickness, and the walls in both arms and 5a, which can vary from ¹ to ² mm depending on the required strength and type of steel and ^{h d} above the ou amounts to ^1, 5 mm. The spinning rotor 1 can be turned from ^pl materiáhi or nails ^{characterized} in Roben napřiad molding extrusion molding or the like. However, it can also be known from the steel plate-shaped body of the spinning rotor 1 with the same wall thickness 6 of the bottom and the rotor wall 3, which is fixed on the base body 2 fixedly mounted on the shaft 8.

The locally limited zone 11 in which the largest inside diameter B of the collecting groove 4 for the fibers, the rotor wall 3 over the entire circumference and the entire thickness and ^hardened, thus forming a cloudy structural ring with rotačrn ^pl oc ^H ou C-shaped ^the \ ^d includes a manifold ⁴ at once ^{on a P} ro vtekna. On a one-piece rotor wall 3, the restricted zone 11 extends between the non-hardened areas 12 and 12a from the bottom 4b of the collecting groove 4 to both arms 5 and 5a along the length D of the rotor wall 3, i.e. of the rotor wall 3 from the edge 7 of the spinning rotor 7 to the base body 2, so that the fiber ring 9 lined with the fiber collecting groove 4 lies within the turbid zone 11 - Fig. 2. The length dimension D of the rotor wall 3 is preferably chosen to extend over directly to the bottom 4b of the collecting groove 4, the fiber-lined areas of the surfaces ⁴ and the rotor stems ³ , ^i.e. over the thickness E of the fiber ring 9, adjoin the fibrous material 9. The relationship between the thickness E and the radius R of the collecting groove 4 exists. structural and zakatením _ unquenched OT) LAST 12 and 12 is always limited structural transition 11, which is caused by the temperature in ^steel, and m materiáto BC and. hardening.

Restricted zone 11 formed over the entire area^vodě^jas a curved structural^prosary^, m^atthat it may be produced by electrospray hardening; in consequence^toat a steep point, I will carry my reeds in the lying areas^h electric mano^poto vzni^toaj^and markedly^E trans^fromy 13, which are for example metallographic^m in^ýgrind to^Bre recognizable^E j^iž with the naked eye. Indukčrn katem m^atthat^bý^t prov^ordern ° using fully sealed^, I do not overlap indu^CZKmvk ^ á^kter^and n^and čá^witht s^přádac^íhabout .rotor 1^kter^and m^{á b}ý^{t ka}the^and, n^andan example of his outer^š ohvoh ta^kže the restricted zone 11 is formed without a seam, i.e. without a seam^kytu st^ykov^ého mfeta not^bo pfetaytí. Partial. turbidity of the rotor stem³ in limited^ofDepending on the type of steel, the thickness and the rotor wall 3, the desired length D of the restricted zone 11 can be performed in the short term by an appropriately adjusted intensity, e.g.^ysoko^Frekven^Cmm no^{bo stř}d^Ofrequency induction catheter.^INys ° k^Ofrequency cat^{that be} e.g^exampleat ston thickness and rotors^{y 3} in the range of 1 to 2^mm achieved zakatený u n^Eh^OThis is the structure created by hardening^ždThe arm of the arms 5 and 5a can spread - measured from the inner diameter^atmeru B - to^déte^E F, d^Osahu^jmeasuring up to 3 mm^, while stre^dO^Frek.ven^Chim ka Each leg 5 and 5a may be opacified^eno on the length F in the range³ and^of mm mm, me^no also from inside^pr^atB.^WITHtr^UKHowever, touring may^bIt can also be carried out using an electron beam, laser beam or flame. Depending on the shape of the spinning rotor 1 a^pO^dle z^psludge treatment can^bThis can be done on the desired length F and thus on the length D of the rotor wall 3, either from the outside or inside of the spinning rotor, in the latter case it is possible^ofno katoní^peq^Est only on^části tlousř^kyand rotor walls 3.

From the point of view of the steel, fire-hardening steel is preferably used. For this purpose, in ^h o ^{n e} and d ^kl eg steel Cf ^45, Cf ^53, Cf 70 or 49 CrMon

Limited wife 11 is otherwise unhardened rotor wall 3 designed for the collection of Dr. ^AZK with ^four fiber resistance Protti abrasion ^ which resists wear fiber material and SPO ^L E ^N N ^E mm ^diameter well ^and deny Mzima, abrasive acting bodies without additional adaptation of the spinning rotor 1 to the desired shape or roundness is required, e.g.

V. ^Importan sle u ^{dk says} lčího zalcatorn rotor 3 remains stony retained its shape, and in a restricted zone 11 is a hardening vzhiklá structure. Due to the high abrasion resistance of the restricted zone 11, it is also not possible to repair the collecting groove 4 of the spinning rotor 1 after a certain period of operation.

Claims (8)

SUBJECT Steel spinning rotor for loose-end spinning machines for producing staple fiber yarn, with a thin-walled rotor wall, provided with a fiber collecting groove at the largest internal diameter of the spinning rotor, characterized in that the rotor wall (3, 17) is turbid in the confined zone (11, 21) in which the collecting groove (4, 20 ') is located. Spinning rotor according to claim 1, characterized in that the restricted zone (11, 21) is located between the non-hardened areas (12, 12a) of the rotor wall (3, 17). Spinning rotor according to claim 1, characterized in that the restricted zone (11, 21) is turbid over the entire thickness (a, b) of the rotor wall. 1 ⁷ ). 4. The spinning rotor according to item 1 or 2 above Overall, the service life of the spinning rotor 1 due to restricted zones 11 substantially extended, i.e. approximately on bearing life at room ^Acka c ^{h ú} grabbing in weight. In the embodiment of Fig. 3, the non-hardened steel spinning rotor 14 is a free end spinning machine. the base body 15, supported by a shaft 16, by which it is also set in rotation. The spinning rotor 14 has a rotor wall 17 of constant thickness b which horizontal part 18 of the bottom wall of the continuation of the basic body 15, and is provided in this wall outwardly dials ^ é short limbs ^{3, kt} ns is in contact with the arm 19a bent inwardly in the direction At the point of contact of the arms 19 and 19a, again, the largest internal diameter G of the spinning rotor 14, in which there is a collecting groove 20 for the acute opening angle β, is. Rotor wall 17 is at its part in contact arms 19 and 19a opacified, so that again made turbid, locally limited ^{and O 2} at 1 ^to No. Tero ^are flush ^{and a} columnar rotor wall 17 of unhardened steel. If desired, the restricted zone 21 can extend over the entire short leg 19 and, for example, also on the adjacent bottom wall portions 18. Even in this embodiment, the thickness of the rotor wall 17 b in a limited zone 21 between 1 ^{and 2 mm,} Oda ^H above ^1.5 mm. characterized in that the rotor wall (3, 17) adjoining the restricted zone (11, 21) has a standing toe ^b ). ^5. instance ^Aad rotor ns ^p odto ^b o u ^d 1 or 4, characterized in that the rotor wall (3, 17) has a limited region (11, 21) has a thickness (a, b) in the range 1-2 mm. 6. The spinning rotor according to claim 5, characterized in that the opening b) of the limited tay (11, 21) is 1.5 mm. 7. The spinning rotor as claimed in claim 1, wherein the steel of which it is made is provided with an anticorrosive layer. Spinning rotor according to claim 1, characterized in that the restricted zone (11, 21) has a length (D) extending beyond the bottom (4b) of the collecting groove (4) and extending into the immediately adjacent surfaces (4a) of the rotor wall. (17).