DE102006014154A1 - Wire ring manufacturing process for locking rings for parts on shafts involves bending wire rod of defined length and with burr-free ends into required annular shape - Google Patents

Abstract

The present invention relates to a method for producing a ring (3) from wire, in particular a locking ring (3) in the manner of a snap ring, which apart from a predeterminable gap has at least one essentially closed turn, with a wire rod directed in the longitudinal direction (LE) (1, 2) is created with a defined length (L1, L2) and with burr-free ends (E1, E2) and bent into the desired ring shape. The present invention also relates to a ring (3) made of wire, in particular a retaining ring (3) in the manner of a snap ring, which apart from a predeterminable gap has at least one essentially closed turn, which is manufactured according to a method according to the invention. Finally, the present invention relates to the use of a ring (3) according to the invention for axially securing components made of plastic, rubber and / or similar materials on axles or shafts, preferably for axially securing a dust protection sleeve.

Description

The The present invention relates to a method for manufacturing a Rings of wire, in particular a circlip in the manner of a Snap rings, which up to a predetermined gap at least having a substantially closed turn. Further concerns the present invention, a ring of wire, in particular a Circlip in the manner of a snap ring, which at least one having substantially closed turn, which after a inventive method is made. After all The present invention relates to the use of a ring according to the invention for axial securing of plastic, rubber and / or the like Materials existing components on axles or shafts, preferably for axial securing of a dust protection sleeve.

rings made of wire, in particular axially mountable retaining rings for shafts according to DIN 472 and / or for Holes according to DIN 472 are in the prior art in numerous Embodiments known. The generally used in annular grooves, made of spring steel retaining rings protrude from the groove out and form an axially resilient artificial shoulder. often are corresponding retaining rings made of spring steel, in particular so-called snap rings according to DIN 5417 or DIN 7993, which from closed, by blowing or cutting the wire turn opened Rings are made, for the axial fixing of components Bolts, axles and / or shafts used. At lower recorded axial forces, For example, in the axial position securing a dust cover a ball stud, one used in the field of motor vehicles Joint sleeve or the like positionally secured to an axle or Wave to be fastened component, come in particular round wire snap rings according to DIN 7993 for use.

at the previously known circlips, especially snap rings according to DIN 7993 have their free ends production due to a ridge. One such ridge is especially in the production of corresponding snap rings given on a conventional spring coiling machine and arises in the context of separating the turn of a snap ring or when cutting the wire of a corresponding ring. Furthermore The ends of a corresponding ring manufacturing reasons, in particular due to material variations of the wire, with an offset provided so that the ring ends are no longer flush with each other or substantially plan aligned facing each other.

One such in the previously known and in particular for axial position assurance given by components used on axles or shafts rings Burr and offset of the free ring ends causes damage and / or destructions of the component to be secured, destroyed by the functionality of the component, at least but is reduced. Especially in plastic, rubber and / or the like Materials existing components, as a rule from a soft Rubber compound existing dust protection cuffs, press the Burr and the offset of a corresponding ring disturbing in the component and damage this until disability.

Ring shape and / or execution of corresponding locking rings, in particular snap rings, are due to the previously common production with conventional, for example from the DE 41 38 896 C2 or the DE 196 11 661 C2 limited known spring winding machines. The known spring-winding machines do not allow a burr-free cutting of the ring wire or ring.

One subsequent Mechanical deburring of corresponding rings is due in particular poor accessibility the interface largely impossible or only with considerable effort possible.

One subsequent Previously common in the art Chemical deburring of corresponding rings is a considerable expense connected, unsatisfactory in terms of achievable Entgratungsergebnisses and affects it In addition, especially due to the given material removal disadvantageous on the wire properties of the rings. The production of rings with defined predictable properties is largely impossible.

Of the Invention is the object in view of this prior art underlying, under reporting the disadvantages described a simple and inexpensive Production of a burr-free and / or largely offset-free ring of wire, in particular a retaining ring in the manner of a snap ring, which up to a predetermined gap at least one substantially closed winding has to allow with defined characteristics which in particular for the axial securing of plastic, rubber and / or the like materials existing components on axes or waves is suitable.

For technical solution of this problem is the present invention, a method for Fer tion of a ring of wire, in particular a snap ring in the manner of a snap ring, which has at least a predetermined gap at least one substantially closed turn proposed, wherein a directed in the longitudinal direction wire rod of defined length and created with burr-free ends and by bending into the desired Ring shape is spent.

Of the Invention is based on the finding that a burr and largely as possible non-offset manufacturing Rings made of wire with simple and inexpensive Means allowed will, if initially in the longitudinal direction directed wire rod of defined length and with burr-free ends created and this afterwards by bending into the desired one Ring shape is spent. In an inventive use of wire rods are their free ends easily accessible and in particular for deburring and / or the like end configuration editable. By the inventive use of directional wire rods are the rings to be produced largely offset formed. By the use according to the invention of wire rods defined length are rings with defined properties, especially in terms of the size, and high manufacturing accuracy, especially with regard to a consistent high-precision embodiment, which in particular with an axial securing of plastic, Rubber and / or the like materials existing components Axles or waves particularly advantageous in terms of their durability is.

advantageously, becomes the wire rod of defined length in the longitudinal direction directed. A further embodiment of the invention provides that the wire rod of defined length by cutting to length created by an endless wire. Another advantageous Embodiment of the invention provides that the wire rod before the Shorten directed by the endless wire in the longitudinal direction is, preferably automatically by a wire straightener. Advantageously, the burr-free ends of the wire rod through Shorten of the wire is preferably made with a cutting tool Cutting device, particularly preferably with a cassette cut.

According to one Another embodiment of the invention, the burr-free ends of the wire rod in each case by at least one 90 ° to the longitudinal direction created the wire rod cut, preferably with a Cutting tool of a cutting device. By the inventive 90 ° to the Longitudinal extension the wire rod cut becomes a defined burr-free End of wire created. A corresponding section at 90 ° to the longitudinal direction The wire rod is at so far for the production of retaining rings not used in the manner of a snap ring conventional spring coiling machine possible. In a particularly advantageous embodiment of the invention takes place the cut in two stages, first from one side to a lower 90 ° to the longitudinal direction the wire rod incision and then from the opposite Side at 90 ° to the Longitudinal extension the wire rod section takes place. By this method of the invention can be the cutting edge at the free ends of the wire rod burr-free and offset training, especially as a caused by the cut sometimes Offset of the wire rod end avoided or compensated becomes. Advantageously, the gate of the wire rod is up in a range of about one third of the diameter of the wire rod up to half Diameter of the wire rod.

advantageously, the ends of the wire rod are rounded, preferably by vibratory grinding. According to the invention can so the preferably burr-free, cut ends of the wire rod a post-processing supplied and according to the desired Requirements a wire rod or a ring with rounded configured ends are made. Here is the rounding advantageously adjustable.

In a further advantageous embodiment of the invention chamfering the ends of the wire rod, preferably such that the surfaces the ends of the wire rod after transfer of the wire rod in the desired Ring shape facing each other in a substantially positive fit, the surfaces especially preferably to the longitudinal direction of the wire rod a deviating from 90 ° Take angle. According to the invention can so the preferably burr-free, cut ends of the wire rod a post-processing supplied and according to the desired Requirements a wire rod or a ring with chamfered Ends are made. The chamfer is advantageously adjustable.

advantageously, is the defined length of the Wire rod to the length the inner circumference of the desired Adapted ring shape, preferably taking into account the half Cross section of the wire. By this embodiment of the invention is the quality the rings to be manufactured further risigerbar. Advantageously so over the length of the wire rod with a gap an accuracy in a range of ± 0.01 mm achievable.

A further advantageous embodiment of the invention provides that in the context of the introduction of the wire rod in the desired ring shape with a down to a predetermined gap in wesentli chen closed turn the free ends largely offset from each other, wherein the offset of the free ends of the wire rod to each other preferably in a range between about 0.01 mm and 0.05 mm. As a result, a further increase in quality of the rings to be produced can be achieved.

A Further advantageous embodiment of the invention provides that the wire rod in the context of the introduction into the desired ring shape in a substantially central region of its length one the cross section of the desired Set ring mold and / or forming mold set is and the free ends of the wire rod around or on the outer surface of the Forming tool are applied by bending, whereby by applying the free ends of the wire rod the circumferential contour of the desired Ring shape of the wire rod is generated.

advantageously, the ring is made of a spring steel, preferably EN10270-1-SH, EN10270-1-SM, EN10270-1-DH, EN10270-2-FD, EN10270-2-VD, EN10270-3-1.4310, EN10270-3-1.4568, or CuSn6.

In a further embodiment of the invention, the wire rod or the endless wire has a circular, rectangular, quadrangular or triangular cross-section on.

In a further advantageous embodiment of the invention is the Ring in a substantially circular, rectangular, quadrangular or triangular shape spent.

A Particularly advantageous embodiment of the invention provides that the wire rod or made of this ring with a coating is, preferably by painting, galvanizing, phosphorizing and / or oils, wherein the wire rod or made of this ring particularly preferred provided with a plastic, a delta-tone or a delta-seal coating becomes. By this inventive finishing of the wire rod or the ring are further options for customization the respective needs given the components to be secured.

object The present invention is further a ring of wire, in particular a snap ring in the manner of a snap ring, which at least has a substantially closed turn and after a inventive method is made.

Finally, concerns the present invention the use of a ring according to the invention for axial securing of plastic, rubber and / or the like Materials of existing components on axles or shafts, preferably for axially securing a dust protection sleeve.

Further Details, features and advantages of the invention will become apparent below explained in more detail with reference to the embodiments illustrated in FIGS, thereby demonstrate:

1 in a schematic representation of an embodiment of a wire rod according to the invention;

2 in a schematic representation in detail one end of the wire rod according to 1

3 in a schematic representation of another embodiment of a wire rod according to the invention;

4 in a schematic representation in detail one end of the wire rod according to 3 ;

5 in a schematic representation of an embodiment of a locking ring according to the invention;

6 a sectional view of the locking ring along the section line AA after 5 ;

7 in a schematic representation of a detail of the locking ring according to 5 and

8a to 8d in a schematic schematic diagram of an embodiment of an inventive moving a wire rod into a desired ring shape by bending.

1 shows a directed in the longitudinal direction LE wire rod 1 with a defined length L1 with burr-free ends E1. The wire rod 1 is made in the present case of a spring steel with a round cross-section. The burr-free ends E1 of the wire rod 1 are created by a two-step cut, with the wire rod 1 first from one side at 90 ° to the longitudinal direction of the wire rod LE 1 cut and then from the opposite side at 90 ° to the longitudinal direction of the wire rod LE 1 was cut off. In a subsequent post-processing step, the ends E1 of the wire rod became 1 rounded by vibratory grinding, as indicated by an in 2 shown in detail End E1 of the wire rod 1 seen.

3 shows a further in the longitudinal direction LE directed wire rod 2 with a defined length L2 with burr-free ends E2. The wire Rod 2 is also made of a spring steel with a round cross-section. The burr-free ends E2 of the wire rod 2 are created by a two-step cut, with the wire rod 2 first from one side at 90 ° to the longitudinal direction of the wire rod LE 2 cut and then from the opposite side at 90 ° to the longitudinal direction of the wire rod LE 2 was cut off. In a subsequent post-processing step, the ends E2 of the wire rod became 2 by grinding with a bevel, as indicated by a in 4 shown in detail End E2 of the wire rod 2 seen.

5 and 6 show one from a wire rod 1 according to 1 and 2 or from a wire rod 2 according to 3 and 4 by bending shaped ring 3 with a circular cross-section. The ring 3 is present a circlip 3 in the manner of a snap ring, which - as in particular with reference to 7 recognizable - except for a gap S has a largely closed turn. The circlip 3 In this case, at a defined wire rod length of about 65.35 mm ± 0.1 mm with a round wire rod cross section with a diameter of 1.8 mm on its inside has a diameter of about 19.4 mm ± 0.2 mm and a width of the gap in a range of about 0.9 mm to 1.1 mm. The offset of the free ends E1 and E2 of the wire rod 1 respectively 2 to each other in the range of the gap S in this case about 0.01 mm.

8a to 8d shows the as part of the production of the circlip 3 from a wire rod 1 according to 1 and 2 or from a wire rod 2 according to 3 and 4 by moving into the desired ring shape by bending. 8a shows how the wire rod 1 respectively 2 in a substantially central region of its length L1 or L2 on a cross-section of the desired ring shape having mold, in this case a fixed mandrel 4 with a retaining bolt 5 established. 8b as on the wire rod 1 respectively 2 on both sides of the retaining bolt 5 one bending mandrel each 6 attacks, which in a lane or turn around the thorn 4 is moved around. As part of the movement of the bending mandrel 6 on, on and / or along the path or curve becomes the respective end of the wire rod 1 respectively 2 successively to the outer surface 7 of the thorn 4 created, in particular on the basis of in 8c and 8d shown movement states shown. Here is the respective bending mandrel 6 presently for applying the for bending the wire rod 1 respectively 2 required forces and / or moments in the length adjustable, as symbolized by the double arrow marked with V. 8d shows the position of the bending mandrels 6 in the final state of the movement and the correspondingly manufactured locking ring 3 according to 5 and 6 ,

The in the figures of the drawings illustrated embodiments of the invention are for explanation only of the invention and are for these are not restrictive.

1

wire rod

2

wire rod

3

circlip

4

mandrel (Die)

5

retaining bolt (Die)

6

mandrel

7

Outer surface (mandrel ( 4 ))

E1

End (wire rod ( 1 ))

E2

End (wire rod ( 2 ))

L1

Length (wire rod ( 1 ))

L2

Length (wire rod ( 2 ))

LE

Longitudinal direction (wire rod ( 1 ), Wire rod ( 2 ))

S

annular gap

V

Adjustment (bending mandrel ( 6 ))

Claims (18)

Method of manufacturing a ring ( 3 ) made of wire, in particular a safety ring ( 3 ) in the manner of a snap ring, which has at least one substantially closed turn except for a predeterminable gap, characterized in that a wire rod (L) directed in the longitudinal direction (FIG. 1 . 2 ) with a defined length (L1, L2) and with burr-free ends (E1, E2) created and brought by bending in the desired ring shape. Method according to claim 1, characterized in that the wire rod ( 1 . 2 ) of defined length in the longitudinal extension direction (LE) is directed. Method according to claim 1 or claim 2, characterized in that the wire rod ( 1 . 2 ) of defined length (L1, L2) is created by cutting to length of an endless wire. Method according to claim 2 or claim 3, characterized in that the wire rod ( 1 . 2 ) is directed before cutting from the endless wire in the longitudinal direction (LE), preferably automatically by a wire straightening device. A method according to claim 3 or claim 4, characterized in that the burr-free ends (E1, E2) of the wire rod ( 1 . 2 ) are created by cutting the wire. Method according to one of claims 1 to 5, characterized in that the burr-free ends of the wire rod ( 1 . 2 ) by at least one at 90 ° to the longitudinal direction (LE) of the wire rod ( 1 . 2 ) to be made. A method according to claim 6, characterized in that the cut takes place in two stages, wherein at least one side at 90 ° to the longitudinal direction (LE) of the wire rod ( 1 . 2 ) incision and then from the opposite side at 90 ° to the longitudinal direction (LE) of the wire rod ( 1 . 2 ) section takes place. Method according to one of claims 1 to 7, characterized in that the ends (E1, E2) of the wire rod ( 1 . 2 ) are rounded, preferably by vibratory grinding. Method according to one of claims 1 to 8, characterized in that the ends (E1, E2) of the wire rod ( 1 . 2 ), preferably in such a way that the surfaces of the ends (E1, E2) of the wire rod ( 1 . 2 ) after transfer of the wire rod ( 1 . 2 ) in the desired ring shape are substantially positively opposed to each other, wherein the surfaces particularly preferably to the longitudinal direction (LE) of the wire rod ( 1 . 2 ) take an angle other than 90 °. Method according to one of claims 1 to 9, characterized in that the defined length (L1, L2) of the wire rod ( 1 . 2 ) is adapted to the length (L1, L2) of the inner circumference of the desired ring shape, preferably taking into account the half-section of the wire. Method according to one of claims 1 to 10, characterized in that in the context of the deployment of the wire rod ( 1 . 2 ) in the desired ring shape with a substantially closed turn the free ends (E1, E2) largely offset from each other, wherein the offset of the free ends (E1, E2) of the wire rod ( 1 . 2 ) is preferably in a range between about 0.01 mm and 0.05 mm. Method according to one of claims 1 to 11, characterized in that the wire rod ( 1 . 2 ) in the context of the casting into the desired ring shape in a substantially central region of its length (L1, L2) on a forming the cross-section of the desired ring shape and / or forming mold ( 4 ) and the free ends (E1, E2) of the wire rod ( 1 . 2 ) around or on the outer surface of the mold ( 4 ) are applied by bending, wherein by the application of the free ends (E1, E2) of the wire rod ( 1 . 2 ) the peripheral contour of the desired ring shape of the wire rod ( 1 . 2 ) is produced. Method according to one of claims 1 to 12, that the ring ( 3 ) is made of a spring steel, preferably EN10270-1-SH, EN10270-1-SM, EN10270-1-DH, EN10270-2-FD, EN10270-2-VD, EN10270-3-1.4310, EN10270-3-1.4568, or CuSn6. Method according to one of claims 1 to 13, characterized in that the wire rod ( 1 . 2 ) or the endless wire has a circular, rectangular, quadrangular or triangular cross-section. Method according to one of claims 1 to 14, characterized in that the ring ( 3 ) is placed in a substantially circular, rectangular, quadrangular or triangular shape. Method according to one of claims 1 to 15, characterized in that the wire rod ( 1 . 2 ) or made of this ring ( 3 ) is provided with a coating, preferably by painting, galvanizing, phosphorizing and / or oils, wherein the wire rod ( 1 . 2 ) or made of this ring ( 3 ) is particularly preferably provided with a plastic, a delta-tone or a delta-seal coating. Ring ( 3 ) made of wire, in particular retaining ring ( 3 ) in the manner of a snap ring, which has at least one substantially closed turn except for a predetermined gap, characterized in that it is manufactured by a method according to one of claims 1 to 16. Ring ( 3 ) according to claim 17, characterized by, use thereof for the axial securing of plastic, rubber and / or similar materials existing components on axles or shafts, preferably for axially securing a dust cover.