JP2008064247A - Cage manufacturing method, cage manufacturing device, and cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a cage of a rolling bearing enabling inexpensive manufacturing. <P>SOLUTION: This manufacturing method for the cage is provided with a pair of annular parts having both collar parts bent to the inner diameter side and with a plurality of cage bar parts connecting the pair of annular parts with each other to form a plurality of pockets for holding rollers and having central parts recessed to the inner diameter side. The manufacturing method for the cage includes a pressing and spreading process (D) of inserting pressing and spreading dies which are recessed in the radial direction and are moved to the axial direction of a cylindrical member from both opening part sides of the cylindrical member having a side part straight in the axial direction to press and spread the cylindrical member to the outer diameter side; and collar part bending processes (E, F) of bending both collar parts of the pressed and spread cylindrical member to the inner diameter side by collar part bending dies moved in the axial direction of the cylindrical member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage manufacturing method, a cage manufacturing apparatus, and a cage. It is about a vessel.

  Rollers with cages may be used on the idler of an automobile transmission or the large end of a connecting rod (connecting rod) of a motorcycle engine. A roller with a cage is a type of rolling bearing that does not include an outer ring, an inner ring, or the like, and includes a roller and a cage that holds the roller. A cage included in a roller with a cage is required to reduce costs, for example, quality improvement such as stable holding of the roller and productivity improvement.

Among such cages, a technique relating to a manufacturing method of an M-type cage, that is, a cage having a shape in which the center of the column portion and the flange portion are bent to the inner diameter side is disclosed in Japanese Patent Laid-Open No. 3-169442. It is disclosed in Japanese Patent Publication (Patent Document 1) and Japanese Patent Application Laid-Open No. 2000-257638 (Patent Document 2).
JP-A-3-169442 (FIGS. 3 to 6) JP 2000-257638 A (paragraph numbers 0027 to 0029, FIGS. 6 to 8)

  In Patent Document 1, the outer shape of the M-shaped cage is formed by a die press that moves in the axial direction and the radial direction with respect to a workpiece that is a material of the cage. In Patent Document 2, bulging is performed using an incompressible fluid inside the mold to form the outer shape of the M-type cage.

  Here, moving the die press in the radial direction complicates the manufacturing process, so that productivity cannot be improved. Incompressible fluids have a short life and cannot increase production efficiency. As a result, the cost of the cage cannot be reduced.

  An object of the present invention is to provide a method for manufacturing a cage that can be manufactured at low cost.

  Another object of the present invention is to provide a cage manufacturing apparatus having good productivity.

  Still another object of the present invention is to provide a cage that can be manufactured at low cost.

  A method of manufacturing a cage according to the present invention includes a pair of annular portions having both flange portions bent toward an inner diameter side and a pair of annular portions so as to form a plurality of pockets for holding rollers, It is a manufacturing method of a holder | retainer provided with the some pillar part in which the center part was dented in the internal diameter side. The cage is manufactured by inserting a die that has a concave portion in the radial direction from both openings of the cylindrical member whose side portions are straight in the axial direction and moves in the axial direction of the cylindrical member. Then, the step of expanding the cylindrical member to the outer diameter side and the both flanges of the expanded cylindrical member are folded to the inner diameter side by a flange bending mold that moves in the axial direction of the cylindrical member. A bend bending process.

  By comprising in this way, the external shape of a holder | retainer can be made into M type only with the metal mold | die which moves to the axial direction of the cylindrical member used as the starting material of a holder | retainer. In this case, since the outer shape can be changed to the M shape only by the movement in the axial direction, the life of the mold can be extended. In addition, the process can be simplified. Therefore, the cage can be manufactured at a low cost.

  Preferably, the spreading step includes a step of arranging an outer shape mold along the outer shape of the cage around the cylindrical member, and forming the outer shape of the cylindrical member by the spreading die and the outer shape mold, The heel part bending step moves in the axial direction of the cylindrical member, and a necking step in which the heel part is bent inward to the inner diameter side by a predetermined angle by a necking mold having an inclined portion, and after the necking step, And a determining step of bending the flange portion in a direction perpendicular to the axial direction by a determining die that moves in the axial direction and has a plane perpendicular to the axial direction. By doing so, the outer shape of the M-shaped cage can be accurately formed.

  More preferably, the expanding and folding process and the fold part bending process are performed by a transfer press. By carrying out like this, since an expansion process and a heel part bending process can be performed consistently, productivity can further be improved.

  More preferably, it includes a pocket removing step of forming a pocket after the buttocks bending step. When a pocket is formed by punching the side surface with a punch or the like, a “punching burr” protruding in the radial direction is generated around the pocket portion. Such burrs may cause indentations in the outer shape when forming the outer shape. However, with this configuration, when forming the M-type, there is no possibility of causing indentation or the like on the outer shape of the cage due to the removal burr. Therefore, productivity is improved.

  In another aspect of the present invention, a cage manufacturing apparatus includes a pair of annular portions provided with a flange portion bent toward an inner diameter side, and a pair of annular portions so as to form a plurality of pockets for holding rollers. It is a manufacturing apparatus for a cage that includes a plurality of pillar portions that are connected and whose central portion is recessed toward the inner diameter side. The cage manufacturing apparatus has concave portions that are recessed in the radial direction from both opening sides of the cylindrical member whose side portions are straight in the axial direction, moves in the axial direction of the cylindrical member, and moves the cylindrical member to the outer diameter. And a spreading mold that moves in the axial direction of the cylindrical member and bends the flange portion of the cylindrical member that has been spread and expanded to the inner diameter side.

  According to such a cage manufacturing apparatus, the outer shape of the cage can be changed to an M shape with a simple configuration.

  In still another aspect of the present invention, the cage connects the pair of annular portions so as to form a pair of annular portions each having a flange portion bent toward the inner diameter side, and a plurality of pockets for holding the rollers. The center part is provided with a plurality of pillar parts dented to the inner diameter side. The cage has concave portions recessed in the radial direction from both opening sides of the cylindrical member whose side portions are straight in the axial direction, and is inserted into a cylindrical mold that moves in the axial direction of the cylindrical member. The cylindrical member is expanded to the outer diameter side, and the flange portion of the expanded cylindrical member is bent to the inner diameter side by a bending mold that moves in the axial direction of the cylindrical member.

  Such a cage can be made M-shaped by a mold that moves in the axial direction of the cylindrical member, and therefore can be manufactured at low cost.

  According to the present invention, the outer shape of the cage can be changed to the M shape only by the mold that moves in the axial direction of the cylindrical member that is the starting material of the cage. In this case, since the outer shape can be changed to the M shape only by the movement in the axial direction, the life of the mold can be extended. In addition, the process can be simplified. Therefore, the cage can be manufactured at a low cost.

  Further, according to such a cage manufacturing apparatus, the outer shape of the cage can be made M-shaped with a simple configuration.

  Further, such a cage can be manufactured at a low cost because it can be formed into an M shape by a mold that moves in the axial direction of the cylindrical member.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of a cage according to an embodiment of the present invention. Referring to FIG. 2, the retainer 11 includes a pair of annular portions 12a and 12b and a plurality of column portions 14 that connect the pair of annular portions 12a and 12b so as to form a plurality of pockets 13 that hold the rollers. including. The central portion 15 in the axial direction of the column portion 14, that is, the central portion 15 in the direction of arrow A in FIG. 2 is more than the axial end portion 16 of the column portion 14 located on the pair of annular portions 12 a and 12 b side. It is recessed on the inner diameter side. That is, the column part 14 has a substantially V-shaped cross section. Further, both flange portions 18a and 18b forming the flanges 17a and 17b are bent to the inner diameter side. The flanges 17a and 17b extend in a direction perpendicular to the axial direction. That is, the cage 11 is a so-called M-type cage.

  FIG. 3 is a perspective view showing a rolling bearing 19 including the cage 11 shown in FIG. 2 and 3, the rolling bearing 19 includes a cage 11 and a plurality of cylindrical rollers 20. That is, the rolling bearing 19 is a roller with a cage. The plurality of rollers 20 are housed and held in a plurality of pockets 13 provided in the cage 11.

  Next, the manufacturing method of the above cage 11 will be described. FIG. 4 is a flowchart showing a typical process in the method for manufacturing a cage according to the embodiment of the present invention. 5 (A) to 5 (D) are schematic cross-sectional views showing a typical process until a steel plate that is a material of the cage is formed into a cylindrical member that is an intermediate. 5A shows a deep drawing process, FIG. 5B shows a drilling process, FIG. 5C shows a burring process, and FIG. 5D shows a trimming process.

  With reference to FIG. 4 and FIG. 5 (A)-(D), first, the steel plate 21 used as the raw material of a cage is deep-drawn, and the steel plate 21 is processed into a cup shape (FIG. 4 (A), FIG. 5 (A)). Next, the cup-shaped bottom portion 22 is drilled (FIGS. 4B and 5B). Thereafter, the flange 23a existing on the holed side is removed by burring (FIGS. 4C and 5C). Next, by trimming, the other flange portion 23b is formed into a straight shape in the axial direction (FIGS. 4D and 5D). In this manner, the cylindrical member 25 having the side portion 24 that is straight in the axial direction is formed. As described above, by manufacturing the cylindrical member 25, the cylindrical member 25 in which the plate thickness, that is, the thickness of the side portion 24 is substantially uniform can be easily manufactured.

  Next, the expansion process (FIG. 4E) for expanding the cylindrical member 25 obtained by the above-described method to the outer diameter side will be described. FIG. 1 is a schematic cross-sectional view showing a part of a spreader jig 26 included in a cage manufacturing apparatus according to an embodiment of the present invention and used in a cage manufacturing method. In addition, the axial direction of the cylindrical member 25 refers to the direction of arrow B in FIG.

  First, the configuration of the spreading jig 26 will be described. Referring to FIG. 1, the spreading jig 26 is composed of an annular first mold 27 that can be divided by a dividing line in the radial direction, and two annular members, and is arranged second above and below in the axial direction. Dies 28a and 28b, and a moving jig 29 for moving the first die 27 to the inner diameter side. The second molds 28a and 28b are provided to face each other with the cylindrical member 25 interposed therebetween. The moving jig 29 is disposed above the first mold 27. A first inclined portion 31 that is inclined with respect to the axial direction is provided at the axial end portion 30 of the moving jig 29.

  The first mold 27 is divided into four divided molds 27a, 27b, 27c, and 27d by radial dividing lines at intervals of 90 °. That is, one annular first mold 27 is formed by combining the four divided molds 27a to 27d. FIG. 6 is a view of an annular first mold 27 obtained by combining four divided molds 27a to 27d as viewed from the axial direction. In FIG. 1, only two split molds 27 a and 27 b arranged at opposing positions are shown.

  Each of the split molds 27a to 27d is provided with a convex portion 32 that protrudes toward the inner diameter side. The convex portion 32 is provided in the vicinity of the central portion in the axial direction of the divided molds 27a to 27d. Further, the inner diameter surface 33 of each of the divided molds 27a to 27d including the convex portion 32 is a surface along the outer shape of the final cage.

  The second molds 28a and 28b are spreading molds that spread the cylindrical member 25 in the radial direction. That is, the second molds 28a and 28b are one of the constituent members of the cage manufacturing apparatus. Concave portions 35 are provided at both end portions 34a and 34b of the second molds 28a and 28b. The recess 35 is provided so as to reduce the diameters of both end portions 34a and 34b. Specifically, in the second molds 28a and 28b, the radial dimension D of the portion where the recess 35 is provided is smaller than the radial dimension E of the portion where the recess 35 is not provided. Has been. Further, the dimension D is configured to be slightly smaller than the dimension F in the radial direction of the cylindrical member 25. The recess of the recess 35 has a shape corresponding to the protrusion of the protrusion 32.

  The second molds 28a and 28b and the moving jig 29 are movable in the axial direction, that is, in the direction of the arrow B in FIG. The split molds 27a to 27d are movable to the inner diameter side by the movement of the moving jig 29 in the axial direction. Specifically, when the moving jig 29 is moved in the direction of arrow B in FIG. 1, each of the split molds 27 a to 27 d has an inner diameter side portion along the inclination of the first inclined portion 31. Is moved to the direction of arrow C in FIG.

  With reference to FIG. 1 and FIG. 6, a method of expanding the cylindrical member 25 to the outer diameter side and forming the outer shape of the cylindrical member 25 into the final shape of the cage will be described. First, the cylindrical member 25 is disposed between the divided molds 27a to 27d and between the second molds 28a and 28b disposed in the vertical direction.

  Thereafter, the moving jig 29 is moved in the direction of arrow B in FIG. 1, and the split molds 27 a to 27 d are moved in the direction of arrow C. Then, the convex portions 32 of the split molds 27 a to 27 d are brought into contact with the outer diameter surface 36 of the cylindrical member 25. This state is shown in FIG. In this way, the split molds 27a to 27d, which are external molds having a shape that follows the external shape of the cage, are arranged around the cylindrical member 25.

  By configuring in this way, the split molds 27a to 27d can be moved to the inner diameter side only by the movement of the moving jig 29 in the axial direction. In this case, the first inclined portion 31 can smoothly and surely move the divided molds 27a to 27d to predetermined positions.

  Next, the second molds 28a and 28b are moved in the direction of the arrow B or vice versa, and are inserted into the inner side from the both side portions 37a and 37b which are both openings of the cylindrical member 25. This state is shown in FIG. At this time, the annular recesses 35 are provided at both end portions 34a, 34b of the second molds 28a, 28b, and the dimensional relationship described above can be inserted smoothly.

  Here, since the dimension in the radial direction of the portion where the concave portion 35 is not provided is configured to be larger than the dimension in the radial direction of the portion where the concave portion 35 is provided, the second molds 28a and 28b are used to form a cylinder. The member 25 is inserted so as to spread from the inside. Then, it inserts until the both ends 34a and 34b of 2nd metal mold | die 28a and 28b contact | abut mutually. Here, since the concave portions 35 having a shape along the convex portions 32 provided in the divided molds 27a to 27d are provided at both end portions 34a and 34b of the second molds 28a and 28b, the cylindrical member 25 is provided. Of the side portions 24, the central portion in the axial direction can be shaped to be recessed toward the inner diameter side. In this way, the side portion 24 of the cylindrical member 25 has a substantially V-shaped cross section, and has a shape along the inner diameter surface 33 of the divided molds 27a to 27d, that is, the outer shape of the final cage. it can.

  Next, the heel part bending process for forming a flange on the cylindrical member 25 obtained by the above-described method will be described. The manufacturing method of the retainer which concerns on one Embodiment of this invention includes a buttocks bending process. The heel part bending step includes a necking step (FIG. 4 (F)) in which both the heel portions 37a and 37b of the cylindrical member 25 are bent in the radial direction by a predetermined angle, and after the necking step, the both heel portions 37a and 37b are And a determination step (FIG. 4G) of bending in a direction perpendicular to the axial direction. FIG. 9 is a schematic cross-sectional view showing a part of a necking jig 38 included in the cage manufacturing apparatus according to one embodiment of the present invention and used in the cage manufacturing method.

  First, the configuration of the necking jig 38 will be described. FIG. 9 is a schematic cross-sectional view showing a necking jig. Referring to FIG. 9, the necking jig 38 includes the first mold 27 described above, two annular members, and third molds 39 a and 39 b arranged in the vertical direction, and the cylindrical member 25. The annular 4th metal mold | die 40 arrange | positioned at the internal diameter side of this and which can be divided | segmented by the dividing line of radial direction, and the insertion jig 41 arrange | positioned at the internal diameter side of the 4th metal mold | die 40 are provided. The third molds 39a and 39b are movable in the axial direction, that is, in the direction of the arrow B or vice versa. The 3rd metal mold | die 39a, 39b is a collar part bending metal mold | die which bend | folds the collar part of the cylindrical member 25 pushed and expanded to the inner diameter side. That is, the third molds 39a and 39b are one of the constituent members of the cage manufacturing apparatus. The insertion jig 41 is a rod-shaped member.

  The fourth mold 40 is divided into eight divided molds 40a, 40b, 40c, 40d, 40e, 40f, 40g, and 40h along a radial dividing line at 45 ° intervals. That is, eight annular molds 40a to 40h are combined to form one annular fourth mold 40. FIG. 10 is a view of the combined eight divided molds 40a to 40h as seen from the axial direction. In FIG. 9, only two split molds 40 a and 40 b arranged at opposing positions are shown.

  Each of the outer diameter surfaces 42 of the divided molds 40a to 40h has a shape along the inner diameter surface 43 of the cylindrical member 25 whose side portion 24 has a substantially V-shaped cross section. That is, the central portion in the axial direction has a shape recessed toward the inner diameter side. Each of the divided molds 40a to 40h is incorporated into the cylindrical member 25, and the insertion jig 41 is disposed at the center thereof, so that the outer diameter surface 42 of the divided molds 40a to 40h is substantially free of gaps and the cylindrical member 25. It contacts with the inner diameter surface 43. Moreover, the 2nd inclination part 44 inclined with respect to the axial direction is provided in the both ends of the axial direction of the division molds 40a-40h.

  At both ends of the third molds 39a and 39b, there are provided recesses 45 whose center portions in the radial direction are recessed. A third inclined portion 46 that is inclined from the axial direction is provided on the outer diameter side of the recess 45. The inclination of the third inclined portion 46 is a shape that follows the inclination of the second inclined portion 44.

  Next, with reference to FIG. 9 and FIG. 10, a necking method for bending both flange portions 37a and 37b of the cylindrical member 25 to the inner diameter side by a predetermined angle will be described. First, the divided molds 40a to 40h constituting the fourth mold 40 are respectively inserted into the inner diameter side of the cylindrical member 25 arranged at the center of the divided molds 27a to 27d, and the outer diameter surface 42 is the inner diameter surface. 43 to be in contact with 43. In this case, since the divided molds 27a to 27d are divided, the respective divided molds 27a to 27d can be easily inserted. The cylindrical member 25 is fixed in the radial direction by the first and fourth molds 27 and 40.

  Next, the third molds 39a and 39b are moved in the axial direction and moved from the vertical direction toward the cylindrical member 25. If it does so, both the flange parts 37a and 37b of the cylindrical member 25 can be bend | folded by a predetermined angle to an internal diameter side along the shape of the 2nd and 3rd inclination parts 44 and 46. FIG. In this way, necking is performed by the axial movement of the third molds 39a and 39b. By doing so, both flanges 37a and 37b can be easily bent in a direction perpendicular to the axial direction on the inner diameter side in a later step. Further, the third molds 39a and 39b and the fourth mold 40 can be bent accurately.

  Then, the determination process which bends both the collar parts 37a and 37b in the direction perpendicular | vertical to an axial direction is performed. First, the configuration of the determination jig 47 used in the determination process will be described. FIG. 11 is a schematic cross-sectional view showing a part of a determining jig 47 included in the cage manufacturing apparatus according to one embodiment of the present invention and used in the cage manufacturing method. Referring to FIG. 11, the determination jig 47 is arranged in the vertical direction of the cylindrical member 25 in the same manner as the first mold 27, the insertion jig 41, and the third molds 39a and 39b. The fifth metal molds 48a and 48b, and the sixth metal mold 49 disposed on the inner diameter side of the cylindrical member, like the above-described fourth metal mold 40, are provided.

  The fifth molds 48a and 48b have substantially the same configuration as the third molds 39a and 39b, and are different in that both ends are configured by a plane 50 in a direction perpendicular to the axial direction. . The fifth dies 48a and 48b are also ridge part bending dies that fold the heel part of the cylindrical member 25 that is spread out to the inner diameter side. That is, the fifth molds 48a and 48b are one of the constituent members of the cage manufacturing apparatus. The sixth mold 49 has substantially the same configuration as that of the fourth mold 40, and the difference is that the end portion is configured by a plane 51 in a direction perpendicular to the axial direction.

  Next, with reference to FIG. 11, a method for bending both flange portions 37a and 37b in a direction perpendicular to the axial direction will be described. In the necking step, the sixth mold 49 is arranged using the insertion jig 41 on the inner diameter side of the cylindrical member 25 in which both the flange portions 37a and 37b are bent to the inner diameter side at a predetermined angle. Thereafter, both flanges 37a and 37b are pushed by the fifth molds 48a and 48b from above and below. If it does so, both collar parts 37a and 37b will be in the shape bent by the planes 50 and 51 in the direction perpendicular | vertical to an axial direction. In this way, a flange in a direction perpendicular to the axial direction is formed. In this case, since both the flange portions 37a and 37b are bent to the inner diameter side by a predetermined angle by the above-described necking step, they are not bent to the outer diameter side by the flat surfaces 50 and 51. In this way, both flanges 37a and 37b form a flange bent in a direction perpendicular to the axial direction on the inner diameter side.

  As described above, the outer shape of the cage can be changed to the M shape only by the mold that moves in the axial direction of the cylindrical member 25 that is the starting material of the cage. In this case, since the outer shape can be changed to the M shape only by the movement in the axial direction, the life of the mold can be extended. In addition, the process can be simplified. Therefore, the cage can be manufactured at a low cost. Further, the cage manufactured in this way can be manufactured at low cost.

  Here, you may decide to manufacture the said process consistently by transfer press. In this case, productivity can be further improved since the above-described pushing and spreading step and heel bending step can be performed consistently.

  Thereafter, the side portions of the cylindrical member 25 are pocketed to form pockets for holding the rollers (FIG. 4H). In this case, since the cylindrical member is formed into an M shape and then the pocket is removed, the “extraction burr” generated when the pocket is removed does not cause indentation or the like on the outer shape of the cage when the M shape is formed. In the pocket punching process, the same press as that used in the above process may be used, or another press may be used.

  Finally, heat treatment is performed to obtain a final cage (FIG. 4I). Note that the outer diameter surface and the width surface of the cage may be ground as required, such as required characteristics, functions, applications, etc., or the entire surface may be polished by barrel polishing. Furthermore, a plating film treatment or the like may be applied to the surface.

  A roller with a cage is manufactured by incorporating the roller into the pocket of the cage manufactured in this way. Such a roller with a cage can be manufactured at low cost.

  Such a roller with a retainer is effectively used, for example, for a large end of a connecting rod or an idler for an automobile transmission. FIG. 12 is a longitudinal sectional view of a two-cycle engine using the above-mentioned roller with cage at the large end of the connecting rod. Referring to FIG. 12, a two-cycle engine 61 connects a crankshaft 64 that outputs rotational motion, a piston 66 that performs linear reciprocating motion by combustion of an air-fuel mixture, and a crankshaft 64 and piston 66, thereby reciprocating linearly. And a connecting rod 65 for converting the motion into a rotational motion. The crankshaft 64 rotates about the rotation center shaft 71 and balances rotation by a balance weight 72.

  The connecting rod 65 is formed by providing a large end portion 74 below the linear rod body and a small end portion 75 above. The crankshaft 64 is rotatably supported by a large end portion 74 of the connecting rod 65, and the piston pin 73 connecting the piston 66 and the connecting rod 65 is rotatably supported by a small end portion 75 of the connecting rod 65 via a rolling bearing 67, respectively. .

  The air-fuel mixture obtained by mixing gasoline and lubricating oil is fed into the crank chamber 63 from the intake hole 68 and then guided to the combustion chamber 70 above the cylinder 62 in accordance with the vertical movement of the piston 66 and burned. The burned exhaust gas is discharged from the exhaust hole 69.

  The roller with cage described above is used for a rolling bearing provided at the large end of the connecting rod and supporting the crankshaft.

  In the above embodiment, the first mold, the fourth mold, etc. are divided into 90 °, 45 °, etc., but not limited to this, 60 °, 30 °, etc. You may decide to use the metal mold | die divided | segmented into arbitrary angles. In this case, in order to smoothly move in the radial direction, it is preferable that the angle formed by one split mold is within 180 °.

  In the above embodiment, the cylindrical member, which is an intermediate body, is formed through a deep drawing process, a drilling process, a burring process, and a trimming process. You may decide to do it.

  In addition, although it decided to shape | mold both the axial parts side of a cylindrical member simultaneously, you may decide to shape | mold not only this but one side. Further, in the necking process and the determining process, the fourth mold and the sixth mold are arranged on the inner diameter side of the cylindrical member. However, the present invention is not limited thereto, and such a mold is not arranged. The flange portion may be bent toward the inner diameter side by a third mold or a fifth mold. Furthermore, the necking process and the determination process may be performed as one process.

  In the above embodiment, the rolling bearing is a roller with a cage. However, the present invention is not limited to this, and the rolling bearing is also applied to a rolling bearing provided with race rings such as an inner ring and an outer ring.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The method for manufacturing a cage according to the present invention is effectively used when good productivity is required.

  Further, the cage manufacturing apparatus according to the present invention is also effectively used when good productivity is required.

  The cage according to the present invention is also effectively used when good productivity is required.

It is a schematic sectional drawing which shows a spreading jig. It is a perspective view which shows the holder | retainer which concerns on one Embodiment of this invention. It is a perspective view which shows the rolling bearing which integrated the roller in the holder | retainer shown in FIG. It is a flowchart which shows a typical manufacturing process among the manufacturing methods of the holder | requirement which concerns on one Embodiment of this invention. It is a schematic sectional drawing which shows the process of forming a cylindrical member from a steel plate, and shows (A) deep drawing process, (B) drilling process, (C) burring process, and (D) trimming process. It is the figure which looked at the state which combined the split mold from the axial direction. It is a figure which shows the state which moved the 1st metal mold | die to the internal diameter side. It is a figure which shows the state which moved the 2nd metal mold | die to the up-down direction. It is a schematic sectional drawing which shows a necking jig. It is the figure which looked at the state which combined the split mold from the axial direction. It is a schematic sectional drawing which shows a decision jig. It is a longitudinal cross-sectional view of the 2-cycle engine which used the roller with a retainer for the big end part of a connecting rod.

Explanation of symbols

  11 cage, 12a, 12b annular part, 13 pocket, 14 pillar part, 15 center part, 16, 30, 34a, 34b end part, 17a, 17b flange, 18a, 18b, 23a, 23b, 37a, 37b collar part, 19, 67 Rolling bearing, 20 rollers, 21 Steel plate, 22, Bottom, 24 Side, 25 Cylindrical member, 26 Spreading jig, 27 First mold, 27a, 27b, 27c, 27d, 40a, 40b, 40c , 40d, 40e, 40f, 40g, 40h Split mold, 28a, 28b Second mold, 29 Moving jig, 31 First inclined part, 32 Convex part, 33, 43 Inner surface, 35, 45 Concave part, 36 42 outer diameter, 38 necking jig, 39a, 39b third mold, 40 fourth mold, 41 insertion jig, 44 second inclined part, 46 third inclined part, 47 Determination jig, 48a, 48b Fifth die, 49 Sixth die, 50, 51 plane, 61 2-cycle engine, 62 cylinder, 63 crank chamber, 64 crankshaft, 65 connecting rod, 66 piston, 68 Intake hole 69 exhaust hole, 70 combustion chamber, 71 rotation center axis, 72 balance weight, 73 piston pin, 74 large end, 75 small end.

Claims (6)

A pair of annular portions having both flange portions bent toward the inner diameter side and a pair of the annular portions so as to form a plurality of pockets for holding the rollers, and a plurality of the central portions recessed to the inner diameter side A method of manufacturing a cage comprising a pillar part,
From both opening sides of the cylindrical member whose side portions are straight in the axial direction, a concave mold recessed in the radial direction is inserted, and a spread mold that moves in the axial direction of the cylindrical member is inserted, and the cylindrical member is A spreading process that spreads to the outer diameter side;
A method for manufacturing a cage, comprising: a flange bending step of bending both the flanges of the cylindrical member that has been spread out to an inner diameter side by a flange bending mold that moves in the axial direction of the cylindrical member. The expanding step includes a step of arranging an outer shape mold along the outer shape of the cage around the cylindrical member, and forming an outer shape of the cylindrical member by the expanding die and the outer shape mold. Including
The collar part bending step moves in the axial direction of the cylindrical member, and a necking step of bending the collar part in advance to the inner diameter side by a predetermined angle with a necking mold having an inclined part;
The said necking process includes the determination process which bends the said collar part in a direction perpendicular | vertical to an axial direction by the determination die which moves to the axial direction of a cylindrical member and has a plane perpendicular | vertical to an axial direction after the said necking process. The manufacturing method of the holder | retainer of description. The cage manufacturing method according to claim 1 or 2, wherein the pushing and spreading step and the flange bending step are performed by a transfer press. The manufacturing method of the holder | retainer in any one of Claims 1-3 including the pocket punching process which forms a pocket after the said collar part bending process. A plurality of pillars having a pair of annular portions each provided with a flange portion bent toward the inner diameter side and a pair of the annular portions so as to form a plurality of pockets for holding the rollers, and whose central portions are recessed toward the inner diameter side. An apparatus for manufacturing a cage comprising:
A spreader that has concave portions that are recessed in the radial direction from both openings of the cylindrical member whose side is straight in the axial direction, moves in the axial direction of the cylindrical member, and spreads the cylindrical member toward the outer diameter side Type,
An apparatus for manufacturing a cage, comprising: a collar bending mold that bends the flange of the cylindrical member that is moved and expanded in the axial direction of the cylindrical member toward an inner diameter side. A plurality of pillars having a pair of annular portions each provided with a flange portion bent toward the inner diameter side and a pair of the annular portions so as to form a plurality of pockets for holding the rollers, and whose central portions are recessed toward the inner diameter side. A cage comprising a portion,
From both opening sides of the cylindrical member, the side portion of which is straight in the axial direction, insert a pushing mold that has a concave portion that is recessed in the radial direction and moves in the axial direction of the cylindrical member, and remove the cylindrical member. Push it to the radial side,
A cage that is manufactured by bending an expanded flange portion of the cylindrical member toward an inner diameter side by a bending mold that moves in the axial direction of the cylindrical member.

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