Title of Invention

DEEP ROLLING UNIT OF A DEEP ROLLING MACHINE FOR CRANKSHAFTS

Abstract

The present invention relates to the deep rolling apparatus (8) of a deep rolling machine 1 for crankshafts (3) in which two arms (9, 10) across from each other support a deep rolling head (13) or a support roller head (14). The support roller head (14) has two support rollers (21, 22) with parallel axes and the deep rolling head (13) has two work rollers (23, 24) entering the radii or fillets of the main bearing or crank pin journals or journals of the crankshafts (3). In one embodiment of the deep rolling apparatus (8) in scissor-like construction an axial guide roller (27) is provided on the deep rolling head (13) and is centered relative to the deep rolling head (13), its axis of rotation being perpendicular to the axis of rotation of the crankshaft (3). The axial guide roller (27) has a diameter that is slightly smaller than the distance between two oil collars (25. 26) of a mam crank pin journal (5) of the crankshaft.

Full Text

SI/cs031308W0 17 December 2004 Deep rolling unit of a deep rolling machine for crankshafts The invention relates to a deep rolling unit of a deep rolling machine for crankshafts, comprising two arms disposed opposite to each other of which one arm bears a deep rolling head and the other arm bears a supporting roller head, the supporting roller head having two supporting rollers in axis-parallel arrangement and the deep rolling head having at least one deep roller whose axis of rotation lies in a common plane with the axis of rotation of the crankshaft and encloses an angle with it, with a drive unit generating the closing and opening movement of the deep rolling unit and also generating the deep rolling force. A deep rolling unit of the kind specified is known, for instance, from DE 299 10 214 U1 and DE 202 00 926 U1. Both cases are deep rolling units comprising devices to prevent collision of the tools with the oil collars of the bearing pins of the crankshaft when the deep rolling units close. Usually, a deep rolling head comprises two deep rollers arranged in pairs at a distance to each other, engaging under the deep rolling force into the radii or recesses between the bearing pins and the cheeks of the crankshaft, while the crankshaft rotates The axes of rotation of both deep rollers each lie in a common plane with the axis of rotation of the crankshaft or are slightly offset towards the axis of rotation of the crankshaft. With reference to the deep rolling head the deep rollers are outwardly inclined and, in this arrangement, enclose an acute angle with the axis of rotation of the crankshaft. 1/1 Both deep rollers are supported by a guide roller inside the deep rolling head, the guide roller being disposed inside the deep rolling head such that it cannot receive forces in longitudinal direction of the crankshaft Supporting roller heads may develop forces in axial direction if, for instance, the axis of one of the two supporting rollers of a supporting roller head are not strictly parallel to the axis of rotation of the crankshaft. Moreover, alignment errors of the deep rolling unit, runout of the crankshaft, conical bearing surfaces of the respective main bearing or connecting rod bearing may generate forces in axial direction, i.e. in the direction of the axis of rotation of the crankshaft, which are undesired in terms of a neat working result and the magnitude of which depends on the magnitude of the deep rolling force and the prevailing friction conditions Therefore, it is an object of the invention to construct a guiding device, which is suited to absorb the forces in axial direction generated by or at the deep rolling tool and thus improve the deep rolling result at the crankshaft. This problem is solved according to the invention by providing an embodiment of the deep rolling unit of scissors construction with an axial guide roller at the deep rolling head arranged centrically to the deep rolling head, whose axis of rotation stands vertically on the axis of rotation of the crankshaft and whose diameter is slightly smaller than the spacing of two oil collars of a main bearing pin or a connecting rod bearing pin of the crankshaft. 2/2 The aforementioned problem is solved according to the invention also by providing ah embodiment of the deep rolling unit of a compact design wherein both arms of the deep rolling unit are linked with each other by a yoke, with an axial guide roller provided at the yoke in centrical arrangement with the deep rolling head, whose axis of rotation stands vertically on the axis of rotation of the crankshaft and which has a diameter slightly smaller than the spacing of two oil collars of a main bearing pin or a connecting rod bearing pin of the crankshaft As the available space often does not permit an arrangement of the axial guide roller vertical to the axis of rotation of the crankshaft, another advantageous embodiment features the axis of rotation of the axial guide roller enclosing an acute angle with a plane, which contains the axis of rotation of the crankshaft and is arranged at a distance and parallel to the common plane of the axes of rotation of the two supporting rollers. In both embodiments an axial guide roller is firmly arranged on the deep rolling head and on the yoke, respectively, which limits an axial movement of the deep rolling unit in the longitudinal direction of the axis of rotation of the crankshaft and transfers forces acting in the same direction into the oil collar of the crankshaft. The arrangement of the axial guide roller under an acute angle does not influence the empty space inside the deep rolling machine which might be required for the axial displacement of the crankshaft. The arrangement even leaves empty space to the upper side, which is sufficient to serve as an access room for the measuring probe to measure in the known way the true running of the crankshaft prior and after the deep rolling process. 3/3 Instead of one single axial guide roller also a pair of axial guide rollers can be provided whose axes of rotation are arranged parallel to each other at a distance. However, it is also possible to provide the axes of rotation of a pair of axial guide rollers off-set when viewing them from an angle vertical to the axis of rotation of the crankshaft. However, as is known, also sliding bodies may be used instead of axial guide rollers The invention will now be specified in greater detail by describing two embodiments thereof. The drawing - Fig 1 is a section through a deep rolling machine with a partial view of a crankshaft conveying device, wherein a deep rolling unit occupies its preclosing position in relation to an introduced crankshaft, Fig. 2 is a section through the deep rolling machine and a section through a main bearing pin of the crankshaft, the deep rolling unit being in its closing position, - Fig 3 is a section taken along the line IV-IV in Fig 4, Fig 4 shows the axial guide roller at a deep rolling unit, which is of a scissors construction, 4/4 Fig 5 shows the cross section through a deep rolling head, - Fig 6 shows the parallelogram of forces for balanced axial forces, Fig 7 shows the parallelogram of forces for non-balanced axial forces, and - Fig 8 shows a second embodiment of a deep rolling unit. A deep rolling machine 1 for the reception of a crankshaft 3 introduced by a crankshaft conveying device 2 has a drive unit (not shown). The drive unit generates the rotary motion of the crankshaft 3 around its axis of rotation 4 during the deep rolling process of a main bearing pin 6 and a connecting rod bearing pin 5. The axis of rotation 4 therefore lies in the axis of rotation of the drive unit. The embodiment shown is limited to the deep rolling of a connecting rod bearing pin 5 of the crankshaft 3, since this is sufficient to explain 1he subject matter of this invention. Associated with the connecting rod pin 5 is a deep rolling unit 8 of scissors construction with two arms 9,10, a scissors pivot 11, a drive unit 12, a deep rolling head 13 and a supporting roller head 14. The drive unit 12 has an adjusting cylinder 15 and a force apparatus 16. The adjusting cylinder 15 generates the closing and opening movement of the deep rolling unit 8, the force apparatus 16 generates the deep rolling force 39. The deep rolling unit 8 is articulated via a point of articulation 17 to a toggle lever 19, which can be swivelled around an axis 18. The toggle lever 19 can be swivelled by means of a piston-and-cylinder unit 20. 5/5 The deep rolling machine 1 is designed such that, when the deep rolling unit 8 closes, first the two axis-parallel supporting rollers 21, 22 of the supporting roller head 14 and thereafter the two deep rollers 23, 24 of the deep rolling head 13 come to bear against the connecting rod bearing pin 5 To this end, the supporting roller head 14 performs a swivel motion 35 around the point of articulation 17, the deep rolling head 13 performing a swivel motion 36 around the scissors pivot 11 During the swivel motions 35 and 36 of the supporting roller head 14 and the deep rolling head 13. respectively, in closing direction, collision with one of the two oil collars 25, 26 of the connecting rod bearing pin 5 is prevented by an axial guide roller 27 provided at the deep rolling head 13 in transverse and centrical arrangement with the supporting rollers 21, 22, the diameter 28 of this axial guide roller being larger than the width 29 of the deep rolling head 13 and slightly smaller than the spacing 29a of the oil collars 25, 26 of the connecting rod bearing pin 5. The axial guide roller 27 is cylindrical outside. In the closed position of the deep rolling unit 8 (Figure 2) a clearance of about 0.25 mm is provided each for both empty spaces 30, 31 between the oil collars 25, 26 and the axial guide roller 27. The axes of rotation 32 and 33 of the two supporting rollers 21 and 22 lie in a common plane 34, which is arranged at a distance s to the plane 38 comprising the axis of rotation 4 of the crankshaft 3. 6/6 The axis of rotation 7 of the axial guide roller 27 encloses an acute angle 37 with the plane-38 which comprises the axis of rotation 4 of the crankshaft 3 and is arranged at a distance s from and parallel to the common plane 34 of the axes of rotation 32 and 33 of the two supporting rollers 21 and 22. The deep rolling unit shown in Figure 4 corresponds to the deep rolling unit illustrated in Figures 1 and 2. From the section through a deep rolling head as shown in Figure 5, the deep rolling force 39 can be seen first, which is applied by the housing 40 via a pivoted guide roller 41 in this housing and the deep rollers 23 and 24 on the crankshaft 3. A relating parallelogram of forces is presented in Figure 6 wherein the deep rolling force 39 is divided into the two components 39' and 39" of equal magnitude If a disturbing axial force 42 is applied to the housing 40 of the deep rolling head 13, a parallelogram of forces is obtained according to Figure 7. There, the deep rolling force 39 is split into the two components 39'" and 39"". Obviously, the two components 39'" and 39"" are different in magnitude. With reference to the section of Figure 5 this means that the left deep roller 24 exerts a higher force 39'" on the crankshaft 3 than the right deep roller 23 with the component 39"". Accordingly, the deep rolling result varies. 7/7 hgure 8 shows another possible embodiment of a deep rolling unit Instead of scissor arms as are underlying the embodiment of Figures 1 to 4 the deep rolling unit 49 is of a compact design Here, both arms 43 and 44 are linked with each other by means of a yoke 45 A lever apparatus 46 with two joints 47 and 48 and a respective drive unit (not shown) swivel the deep rolling unit 49 into working position The deep rolling head 13 linked with arm 43 in the known way, the supporting roller head' 50 is nnoved by a drive unit 51 into an opening or closing position in relation to the crankshaft 3. An axial guide roller 52 projects from the yoke 45 into the direction of the axis of rotation 4 of the crankshaft 3. The axial guide roller 52 is pivotally mounted in a socket 53 at the yoke 45. The axial guide roller 52 in the socket 53 can be either rigidly mounted as shown in Figure 8 or it can be provided with its own drive unit (not shown) which, similarly to the drive unit 51, is suited to move the axial guide roller 52 into a closing or opening position. Instead of single axial guide rollers 27 and 52, sliding bodies may be provided which, without being pivoted themselves, can be inserted into the spacing 29a between the two oil collars 25 and 26. Instead of individual axial guide rollers 27 and 52, also pairs of axial guide rollers can be provided, whose diameter 28- is considerably smaller than shown in Figure 3, however with a circumference bridging the spacing 29a of the oil collars 25 and 26. 8/8 Here again, sliding bodies (not shown) are provided instead of two individual axial guide rollers 27 and 52, as are known from DE 202 00 926 U1. The arrangement of an axial guide roller 27, 52 at the deep rolling head 13 and at the yoke 45, respectively, of a deep rolling unit 8, 49 is advantageous compared to the known arrangement of an axial guide roller at the supporting roller head 14 in that the deep rolling unit 8 49 is provided with direct axial alignment in relation to the crankshaft 3 and any lack of stiffness in the unit arm 9, 43 carrying the deep rolling head 13 as well as in the scissors ' pivot 11 between both arms 9,10 cannot exert an influence on the deep rolling result. 9/9 Sl/cs 031308W0 17 December 2004 PATENT CLAIMS 1 A deep rolling unit of a deep rolling machine for crankshafts, comprising two arms disposed opposite to each other of which one arm bears a deep rolling head and the other arm bears a supporting roller head, the supporting roller head being provided with two supporting rollers in axial-parallel arrangement and the deep rolling head having at least one deep roller whose axis of rotation lies in a common plane with the axis of rotation of the crankshaft and encloses an angle with it, with a drive unit generating the closing and opening movement of the deep rolling unit and also generating the deep rolling force, characterised in that for an embodiment of the deep rolling unit (8) of scissors construction is provided with an axial guide roller (27) is provided at the deep rolling head (13) arranged centrically to the deep rolling head (13), whose axis of rotation (7) stands vertically on the axis of rotation (4) of the crankshaft (3) and which has a diameter (28) slightly smaller than the spacing (29a) of the oil collars (25, 26) of a bearing pin (6) or a connecting rod bearing pin (5) of the crankshaft (3), 2 A deep rolling unit of a deep rolling machine for crankshafts, comprising two arms disposed opposite to each other of which one arm bears a deep rolling head and the other arm bears a supporting roller head, the supporting roller head being provided with two supporting rollers in axial-parallel arrangement and the deep rolling head having at least one deep roller whose axis of rotation lies in a common plane with the axis of rotation of the crankshaft and encloses an angle with it and with a drive unit generating the closing and opening movement of the deep rolling unit and also generating the deep rolling force, characterised in that for an embodiment of the deep rolling unit (49) of a compact design wherein the two arms (43, 44) are linked with each other by means of a yoke (45), the yoke (45) is provided with an axial guide roller (52) arranged centrically to the deep rolling head (13), whose axis of rotation (7) stands vertically on the axis of rotation (4) of the crankshaft (3) and which has a diameter (28) slightly smaller than the spacing (29a) of the oil collars (25, 26) of a main bearing pin (6) or a connecting rod bearing pin (5) of the crankshaft (3), 10/10 3. A deep rolling unit according to claim 1,characterised in that the axis of rotation (7) of the axial guide roller (27) encloses an acute angle (37) with the plane (38) which comprises the axis of rotation (4) of the crankshaft (3) and is arranged at a distance (s) and parallel to the common plane (34) of the axes of rotation (32, 33) of the two supporting rollers (21, 22), 4 A deep rolling unit according to one of claims 1 or 2, characterised in that the axial guide roller (27, 52) is cylindrical or crowned outside, 11/11 5 A deep rolling unit according to claim 4, characterised in t h a t - a fixed prismatic guide sliding body is used instead of the axial guide roller (27, 52), 6 A deep rolling unit according to claim 5, c h a r a c t e ri s e d in that the axial guide roller (27, 52) or the sliding bodies are designed as a pair of axial guide rollers or as a pair of sliding bodies

Documents:

01683-kolnp-2006 abstract.pdf

01683-kolnp-2006 claims.pdf

01683-kolnp-2006 correspondeence other-1.1.pdf

01683-kolnp-2006 correspondence others.pdf

01683-kolnp-2006 description(complete).pdf

01683-kolnp-2006 drawings.pdf

01683-kolnp-2006 form-1.pdf

01683-kolnp-2006 form-2.pdf

01683-kolnp-2006 form-26.pdf

01683-kolnp-2006 form-3.pdf

01683-kolnp-2006 form-5.pdf

01683-kolnp-2006 international publication.pdf

01683-kolnp-2006 international search authority report.pdf

01683-kolnp-2006 other document.pdf

01683-kolnp-2006 pct form.pdf

01683-kolnp-2006 priority document.pdf

01683-kolnp-2006-correspondence-1.2.pdf

01683-kolnp-2006-international search authority report-1.1.pdf

1683-KOLNP-2006-ABSTRACT 1.1.pdf

1683-KOLNP-2006-AMANDED CLAIMS-1.1.pdf

1683-KOLNP-2006-AMANDED CLAIMS.pdf

1683-KOLNP-2006-AMANDEDCLAIMS 1.2.pdf

1683-KOLNP-2006-CANCELLED PAGES.pdf

1683-KOLNP-2006-CORRESPONDENCE 1.2.pdf

1683-KOLNP-2006-CORRESPONDENCE-1.1.pdf

1683-KOLNP-2006-CORRESPONDENCE.pdf

1683-KOLNP-2006-DESCRIPTION (COMPLETE) 1.1.pdf

1683-KOLNP-2006-DRAWINGS 1.1.pdf

1683-KOLNP-2006-ENGLISH TRANSLATION.pdf

1683-KOLNP-2006-FORM 1.1.pdf

1683-KOLNP-2006-FORM 2.1.pdf

1683-KOLNP-2006-FORM 3-1.2.pdf

1683-KOLNP-2006-FORM 3.1.pdf

1683-KOLNP-2006-FORM 5.1.pdf

1683-KOLNP-2006-OTHERS-1.1.pdf

1683-KOLNP-2006-OTHERS.pdf

1683-KOLNP-2006-PA.pdf

1683-KOLNP-2006-PETITION UNDER RULE 137.pdf

1683-KOLNP-2006-PRIORITY DOCUMENT-1.1.pdf

1683-KOLNP-2006-PRIORITY DOCUMENT.pdf

1683-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf

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