JP4561501B2 - Method for manufacturing roller bearing cage - Google Patents

Description

The present invention relates to an improvement in a method for manufacturing a roller bearing retainer that is incorporated in a roller bearing and holds a plurality of rollers in a freely rollable manner .

  Since roller bearings that use rollers as rolling elements have a large load resistance (load capacity), they are used in portions to which a relatively large load is applied among rotation support portions constituting various mechanical devices. FIG. 13 shows an example of a self-aligning roller bearing, which is a kind of such a roller bearing. In this self-aligning roller bearing, a plurality of spherical rollers 3 and 3 are arranged to roll freely between an outer ring 1 and an inner ring 2 that are concentrically combined in a neutral state, and a metal plate is pressed. The retainers 4 and 4 are configured to prevent the spherical rollers 3 and 3 from being separated.

  An outer ring raceway 5 that is a spherical concave surface having a single center is formed on the inner peripheral surface of the outer ring 1. Further, a pair of inner ring raceways 6 and 6 are formed on the outer peripheral surface of the inner ring 2 so as to face the outer ring raceway 5. The plurality of spherical rollers 3, 3 are symmetrical with the maximum diameter portion in the axial center of each of the spherical rollers 3, 3, and the outer ring raceway 5 and the pair of inner ring raceways 6, 6 Between them, they are arranged so as to roll freely in two rows.

  Each of the cages 4 and 4 has a conical cylindrical main portion 7 and an outward flange bent outward from the large diameter side edge of the main portion 7 in the diametrical direction, as shown in FIGS. And a ridge 8 having a shape. A plurality of pockets 9 and 9 are intermittently formed in the main portion 7 in the circumferential direction, and one spherical roller 3 and 3 is respectively held in the pockets 9 and 9 so as to be freely rollable. ing. The main portion 7 is positioned on the inner side in the diameter direction with respect to the pitch circle of the plurality of spherical rollers 3, 3, so that each of the spherical rollers 3, 3 passes through the pockets 9, 9 to form the main portion 7. Prevents slipping out in the diameter direction. Further, the outer peripheral edges of the flanges 8 and 8 of the pair of cages 4 and 4 are guided by being brought into sliding contact with the inner peripheral surface of the guide ring 10 respectively. The guide ring 10 is rotatably provided between the spherical rollers 3 and 3 provided in plural in two rows in the axial direction.

  In addition, a circular or annular recess 11 is formed in at least a portion of the both end faces of the plurality of spherical rollers 3 and 3 facing the flange 8. Further, tongue pieces 12 are formed on the inner peripheral edge of the collar portion 8 at the circumferential intermediate positions of the pockets 9 and 9, respectively. Each of the tongue pieces 12 protrudes inward in the diameter direction from the inner peripheral edge of the flange portion 8 and is bent from the flange portion 8 to the pocket 9 side toward the one end surface of the spherical roller 3. Yes. When the spherical roller 3 is incorporated inside the pocket 9, the tip of each tongue piece 12 engages with the concave portion 11 formed on the end surface of the spherical roller 3 by the engagement allowance δ shown in FIG. Then, the spherical roller 3 is prevented from dropping out from the inside of the pocket 9 to the radially outer side of the cage 4. As a result, the spherical roller 3 rotatably held in the pocket 9 has a diameter from the inside of the pocket 9 before assembly between the inner peripheral surface of the outer ring 1 and the outer peripheral surface of the inner ring 2. With respect to the direction, it will not come out in any direction.

  When the rotating shaft is supported inside the housing by the self-aligning roller bearing configured as described above, the outer ring 1 is fitted and fixed to the housing, and the inner ring 2 is fixed to the rotating shaft. When the inner ring 2 rotates together with the rotating shaft, the plurality of spherical rollers 3 and 3 roll to allow this rotation. Further, when the shaft center of the housing and the shaft center of the rotating shaft do not match, the inner ring 2 is aligned inside the outer ring 1 to compensate for the mismatch. Since the outer ring raceway 5 is formed in a single spherical shape, the rolling of the plurality of spherical rollers 3 and 3 is performed smoothly even after the mismatch compensation.

  Next, the manufacturing method of the retainer 4 that the inventor previously considered in response to the invention described in Patent Document 1 will be described with reference to FIGS. In carrying out this manufacturing method, first, a ring-shaped first intermediate material 13 as shown in FIG. 18A is formed by punching a metal plate as a material. The shape of the inner peripheral edge of the first intermediate material 13 is a substantially waveform in the circumferential direction. Next, in the radially intermediate portion of the first intermediate material 13, punching is performed on the portions having the same phase as the concave portions 14 and 14 on the inner peripheral edge of the substantially corrugated shape with respect to the circumferential direction. By forming the second intermediate material 16 as shown in FIG. In such a second intermediate material 16, the pillar portions 17, 17 existing between the respective through holes 15, 15 have a long shape in the radial direction of the second intermediate material 16. Further, the belt portions 18, 18 existing between the inner peripheral edge of the second intermediate material 16 and each of the through holes 15, 15, the intermediate portions in the circumferential direction protrude outward in the radial direction from both ends. It has a arch shape.

  Next, a third intermediate material 19 as shown in FIG. 3C is formed by performing burring on the radially inner portion of the second intermediate material 16 (the inner portion of the chain line α). In the case of the illustrated example, when performing the burring process, a punch 20 as shown in FIG. 19 is used. This punch 20 is formed in a substantially truncated cone shape (tapered shape) as a whole, and has a cylindrical guide portion 21 at the axial tip portion (lower end portion in FIG. 19) and a truncated cone shape at the intermediate portion. Similarly, the first pushing portion 22 has a truncated cone-like second pushing portion 23 at the base end portion (upper end portion in FIG. 19). Of these, the guide portion 21 has a front half outer peripheral surface as a tapered surface portion 24 inclined in a direction in which the outer diameter becomes smaller toward the distal end portion, and a base half outer peripheral surface as a cylindrical surface portion 25. The outer diameter of the cylindrical surface portion 25 is slightly smaller than the inner diameter of the second intermediate material 16. The outer peripheral surfaces of the first and second push-in portions 22 and 23 are conical convex surfaces that are inclined in a direction in which the outer diameter increases toward the base end side (upper side in FIG. 19). Further, the inclination angle of the conical convex surface with respect to the central axis is made smaller in the second pushing portion 23 than in the first pushing portion 22. The outer diameters of the first and second pushing portions 22 and 23 are larger than the inner diameter of the second intermediate material 16 except for the tip of the first pushing portion 22 (lower end in FIG. 19). . The guide portion 21 is a separate component from the first and second push-in portions 22 and 23, and the first and second push-in portions 22 and 23 are centered by pin engagement or the like. In the combined state, they are connected and fixed by screws or the like.

  When the burring process is performed on the radially inner portion of the second intermediate material 16 using the punch 20 as described above, as shown in FIGS. 19 (A) → (B) → (C), The radially outer portion of the second intermediate material 16 (the outer portion of the chain line α in FIG. 18) is divided into an upper surface (partial conical convex surface) 27 of a substantially cylindrical die 26 and a lower surface (partial portion) of a substantially cylindrical holding die 28. Clamped between the conical concave surface 29). As a result, the radially outer portion of the second intermediate material 16 is plastically deformed in a dish-plate shape between the upper surface 27 and the lower surface 29, and the portion is used as the flange portion 8. At the same time, as shown in FIGS. 19 (A) → (B) → (C) → (D) → (E) → (F), the punch 20 is pivoted on the radially inner portion of the second intermediate material 16. Push in the direction. As a result, the radially inner portion of the second intermediate material 16 is plastically deformed into a conical cylindrical shape so that the portion becomes the main portion 7 and the portions corresponding to the through holes 15 and 15 are respectively formed in the pockets 9. , 9 (see FIGS. 13 to 17, not shown in FIGS. 18C and 19), the third intermediate material 19 is used. When the radially inner portion of the second intermediate material 16 is plastically deformed into a conical cylinder shape as described above, the arch-shaped belt portions 18 and 18 are respectively shown in FIGS. 20 (A) → (B) → As shown in (C), it extends in the circumferential direction. Therefore, at this time, the thickness of the band portions 18 and 18 is greatly reduced, and there is no inconvenience that the band portions 18 and 18 are broken. Once the third intermediate material 19 as described above is formed, the retainer 4 is then moved to the third intermediate material 19 by, for example, processing for adjusting the shape around the flange 8. Finalize.

  In the case of the conventional method for manufacturing a cage as described above, the pockets 9 and 9 (through holes 15 and 15) are formed before the main portion 7 is formed. Compared with the manufacturing method (for example, refer patent document 2) which forms 9, each of these pockets 9 and 9 can be formed easily. However, there is still room for improvement in the manufacturing method considered above, which has such advantages. That is, in the case of the above-described manufacturing method, the burring process is performed on the radially inner portion of the second intermediate material 16, that is, as described above (circumferentially on the outer circumferential surface). There is a possibility that the inner peripheral edge portion of the second intermediate material 16 moves in the circumferential direction when the punch 20 is pushed in the axial direction to plastically deform the radially inner portion into a conical cylinder shape. is there. And when it shifts | deviates, each said pillar part 17 and 17 may incline in the circumferential direction, or may twist. If such tilting or twisting occurs, it is difficult to cause the completed cage 4 to exhibit a desired function, which is not preferable. Further, in the case of the above-described conventional manufacturing method, when the third intermediate material 19 is subjected to processing for adjusting the shape around the flange portion 8, the processing force is applied to the column portions 17 and 17. In addition, there is a possibility that these pillars 17 and 17 are deformed. Even when such deformation occurs, it is difficult to cause the cage 4 after completion to exhibit a desired function, which is not preferable.

  In addition, as a cage incorporated in a roller bearing, a cage 4a that does not include flanges at both ends of the main portion 7 as shown in FIG. 21 is also conventionally known (see, for example, Patent Document 1). . As in the case of the above-described cage 4, such a cage 4 a is formed by performing burring on the radially inner portion of the annular second intermediate material to form the main portion 7. It can be manufactured by cutting out the buttocks existing at the edge of the large diameter side. However, also in the case of manufacturing the cage 4a in this way, when the burring process is performed, there is a disadvantage that the column parts 17 and 17 are inclined in the circumferential direction or twisted. there is a possibility.

JP-A-2005-90740 JP 2000-2247 A

In view of the circumstances as described above, the present invention has been invented to realize a method for manufacturing a roller bearing retainer capable of sufficiently ensuring the shape accuracy of each column portion.

The roller bearing retainer manufacturing method of the present invention is made of a metal plate, formed in a cylindrical main portion and a plurality of circumferential directions of the main portion, and can freely hold the rollers inside each of them. To produce a roller bearing retainer with a large pocket, the metal plate is punched into a ring shape, and the shape of the inner peripheral edge is a waveform related to the circumferential direction. Through holes at a plurality of locations, and an arch-shaped belt portion in which a middle portion in the circumferential direction protrudes in one radial direction (outside or inside) from both ends at a portion between each through hole and the inner peripheral edge of the corrugation. , Forming intermediate materials respectively. Thereafter, a tapered punch having an outer diameter of the tip portion smaller than an inner diameter of the intermediate material and an outer diameter of the intermediate portion and a base end portion larger than the inner diameter of the intermediate material is transferred from the tip end side of the punch to the intermediate portion. Push it axially into the radially inner part of the material. Thus, by extending the respective belt portions in the circumferential direction and plastically deforming the radially inner portion of the intermediate material into a cylindrical shape, the portion plastically deformed into the cylindrical shape is used as the main portion, and The portion corresponding to each through hole is referred to as each pocket.
In particular, in the method for manufacturing a roller bearing retainer according to the present invention, the punch is formed in each of the outer peripheral surfaces in the same phase as the concave portions of the inner peripheral edge of the corrugation in the circumferential direction. In this case, a long convex part is formed in the axial direction of the outer peripheral surface. Then, the punch is pushed in the axially inner portion of the intermediate material while the convex portions are engaged with the concave portions.

In the case of the roller bearing retainer manufacturing method of the present invention as described above, when the punch is axially pushed into the radially inner portion of the intermediate material, the radially inner portion is plastically deformed into a cylindrical shape. Moreover, the circumferential positioning of the inner peripheral edge portion of the intermediate material can be achieved by the convex portions formed on the outer peripheral surface of the punch. For this reason, it is possible to prevent the inner peripheral edge portion of the intermediate material from moving in the circumferential direction. Therefore, it is possible to effectively prevent the column portions existing between the through holes (pockets) provided at a plurality of positions in the circumferential direction of the intermediate material from being inclined or twisted in the circumferential direction. As a result, the quality of the roller bearing cage can be improved.

When carrying out the method for manufacturing a roller bearing retainer according to the present invention, preferably, as described in claim 2, the axial base end side of the outer peripheral surface of the punch with respect to the portion where each convex portion is formed. Second convex portions that are long in the axial direction of the outer peripheral surface of the punch are formed at a plurality of locations in the circumferential direction of the portion. And while guiding each circumferential side surface of each pillar portion existing between each of the through holes provided at a plurality of circumferential positions of the intermediate material, respectively, with the circumferential side surface of each of the second convex portions. The punch is pushed into the radially inner portion of the intermediate material in the axial direction.
In this way, it is possible to more effectively prevent the pillars from being inclined or twisted in the circumferential direction when performing the pushing operation.

In carrying out the method for manufacturing a roller bearing cage according to the present invention, preferably, as described in claim 3, the radially inner portion of the intermediate material is plastically deformed into a cylindrical shape as described above. After the main part is made the main part, the main part is sandwiched between the inner peripheral surface of the die and the outer peripheral surface of the holding punch, and the pockets provided in a plurality of circumferential directions of the main part are Each of the pillar portions existing between the two is sandwiched from both sides in the circumferential direction by a pair of convex portions formed on at least one of the inner peripheral surface of the die and the outer peripheral surface of the holding punch. And in this state, the process for shape | molding the collar part which comprises a holder | retainer is given to the radial direction outer side part of the said intermediate material.
If it does in this way, even when the processing force for shape | molding the said collar part reaches said each column part, it can prevent effectively that these each column part deform | transforms. For this reason, the quality of a cage provided with the above-mentioned collar part can be improved.

  1 to 11 show an embodiment of the present invention. The feature of the present embodiment lies in the method of manufacturing the cage 4, and specifically, the radially inner portion (the inner portion of the chain line α) of the second intermediate material 16 shown in FIG. A method of forming a third intermediate material 19 as shown in FIG. 3C, and a method of performing a forming process by a press on the collar portion 8 constituting the third intermediate material 19, Each of them is devised. Other configurations and operations are the same as those in the case of the conventional structure shown in FIGS. 13 to 18 and 20 and the method previously considered. Therefore, overlapping illustrations and explanations are omitted or simplified. The description will focus on the features of

  In the case of the present embodiment, when burring is performed on the radially inner portion of the second intermediate material 16 shown in FIG. 18B, a punch 20a as shown in FIGS. 1 to 6 is used. Like the punch 20 shown in FIG. 19, the punch 20a has a cylindrical guide portion 21a (shown only in FIG. 4) at the axial tip portion (lower end portions in FIGS. 1, 3 and 4). The intermediate portion has a truncated cone-shaped first pushing portion 22a, and similarly has a truncated cone-shaped second pushing portion 23a at the base end portion (upper end portions in FIGS. 1, 3 and 4). However, in the case of the present embodiment, of the outer peripheral surfaces of the guide portion 21a and the first push-in portion 22a, in the portions in phase with the concave portions 14 and 14 on the inner peripheral edge of the second intermediate material 16 in the circumferential direction, Each forms the 1st convex part 30 and 30 long in the axial direction of the said outer peripheral surface. The width dimension of each of the first convex portions 30 and 30 in the circumferential direction is set to a size that allows at least the tip portions of the first convex portions 30 and 30 to enter the concave portions 14 and 14. Yes. Further, in the base half of the outer peripheral surface of the second pushing portion 23a, the same as the through holes 15 and 15 (the first convex portions 30 and 30) constituting the second intermediate material 16 in the circumferential direction. In the phase portion, second convex portions 31 and 31 that are long in the axial direction of the outer peripheral surface are formed. The interval between the second convex portions 31 and 31 adjacent to each other in the circumferential direction is the same as or slightly smaller than the width in the circumferential direction of the column portions 17 and 17 constituting the second intermediate material 16. To make it bigger. Thereby, each said pillar part 17 and 17 is made to enter into the part between each said 2nd convex parts 31 and 31 without big rattling. In the illustrated embodiment, the guide portion 21a is a separate component from the first and second push-in portions 22a and 23a, and the first and second push-in portions 22a and 23a On the other hand, it is coupled and fixed by screwing or the like in a state in which center alignment and circumferential phase alignment are performed by pin engagement or the like.

  When performing burring on the radially inner portion of the second intermediate material 16 using the punch 20a as described above, as shown in FIGS. 4 (A) → (B) → (C), The radially outer portion of the second intermediate material 16 (the outer portion of the chain line α in FIG. 18) is divided into an upper surface (partial conical convex surface) 27 of a substantially cylindrical die 26 and a lower surface (partial portion) of a substantially cylindrical holding die 28. Clamped between the conical concave surface 29). As a result, the radially outer portion of the second intermediate material 16 is plastically deformed in a dish-plate shape between the upper surface 27 and the lower surface 29, and the portion is used as the flange portion 8. At the same time, as shown in FIGS. 4 (A) → (B) → (C) → (D) → (E) → (F), the punch 20a is pivoted on the radially inner portion of the second intermediate material 16. Push in the direction.

  Specifically, first, as shown in FIG. 4 (A) → (B), following the insertion of the guide portion 21a into the center hole of the second intermediate material 16, the second intermediate material 16 Each said 1st convex part 30 is made to approach (engage) inside each recessed part 14 formed in the inner periphery. And by engaging in this way, the circumferential direction positioning of the inner peripheral edge portion of the second intermediate material 16 is attempted. In this state, as shown in FIGS. 4 (B) → (C) → (D), the position of each recess 14 in the circumferential direction is regulated by each first projection 30 while the second The first pushing portion 22a is pushed axially into the radially inner portion of the intermediate material 16. Subsequently, as shown in FIG. 4D → E, the radial direction of the second intermediate material 16 is also controlled by the first convex portions 30 while restricting the positions of the concave portions 14 in the circumferential direction. The second pushing portion 23a is pushed into the inner portion in the axial direction. At the same time, as shown in FIGS. 4 (D) to (F) and FIGS. 5 to 6, the second intermediate material is disposed in a portion between the second convex portions 31 and 31 adjacent to each other in the circumferential direction. Each column part 17 which comprises 16 is made to approach. In this state, as shown in FIG. 4 (E) → (F), the second intermediate portions are guided by the second convex portions 31, 31 while guiding the circumferential side surfaces of the column portions 17. The second pushing portion 23a is further pushed in the axial direction into the radially inner portion of the material 16.

  As a result, as shown in FIG. 4 (F), the radially inner portion of the second intermediate material 16 has a conical cylindrical shape between the outer peripheral surface of the second pushing portion 23a and the inner peripheral surface of the die 26. The portions corresponding to the through holes 15 and 15 constituting the second intermediate material 16 are formed into pockets 9 and 9 {FIG. 18C and FIG. The third intermediate material 19 is shown in FIG. In the case of this embodiment as well, when the radially intermediate portion of the second intermediate material 16 is plastically deformed into a conical cylinder shape to form the third intermediate material 19 as described above, Each of the arch-shaped belt portions 18 and 18 constituting the inner peripheral edge portion extends in the circumferential direction as shown in FIGS. 20 (A) → (B) → (C). Therefore, at this time, the thickness of the band portions 18 and 18 is greatly reduced, and there is no inconvenience that the band portions 18 and 18 are broken.

  If the third intermediate material 19 as shown in FIGS. 4 (F) and 18 (C) is formed as described above, then the collar 8 constituting the third intermediate material 19 is pressed against the collar 8. The forming process is performed. In the case of the present embodiment, when the forming process is performed, a holding punch 32, a die 33, and a pressing die 34 are used as shown in FIGS. Among these, the holding punch 32 is formed in a cylindrical shape as a whole, and the outer peripheral surface of the tip end portion (the lower end portions of FIGS. 7, 9, and 10) is the inner peripheral surface of the main portion 7 constituting the third intermediate material 19. It is made into the taper taper shape in alignment with. At the same time, third convex portions 35, 35 that can enter the pockets 9, 9 constituting the third intermediate material 19 in a plurality of positions in the circumferential direction on the outer peripheral surface of the tip portion without rattling. Forming. Further, the die 33 is formed in an annular shape as a whole, the upper surface 36 is a conical convex surface along one side surface (the lower surface in FIG. 10) of the flange portion 8, and the inner peripheral surface 37 is the main portion 7. It is a conical concave surface along the outer peripheral surface. Further, a fourth convex portion that can enter the pockets 9 and 9 in the same phase as the pockets 9 and 9 in the circumferential direction at the upper end portion of the inner circumferential surface 37 without rattling. 38 and 38 are provided. The pressing die 34 is formed in an annular shape as a whole, and is disposed around the holding punch 32 so as to be axially displaceable with respect to the holding punch 32. However, a spring 41 having a large elasticity is provided between the pressing punch 32 and the pressing die 34 so that the pressing die 34 can be strongly pressed downward. On the lower surface of such a pressing die 34, the radially inner half is a ring-shaped flat surface, and the radially outer half is a conical concave surface along the other side surface (upper side surface of FIG. 10) of the flange portion 8. The processing surface 39 is provided.

  When forming the pressing portion 32 constituting the third intermediate material 19 by using the pressing punch 32, the die 33, and the pressing die 34 as described above, first, as shown in FIG. The third intermediate material 19 is set on the die 33 as shown in FIG. That is, the upper surface 36 of the die 33 supports the one side surface of the flange portion 8, and the inner peripheral surface 37 of the die 33 supports the outer peripheral surface of the main portion 7. At the same time, the fourth intermediate portions 19 are positioned in the circumferential direction by allowing the fourth convex portions 38 and 38 to enter the pockets 9 and 9 without rattling. Next, as shown in FIGS. 10A to 10B, by inserting the tip end portion of the holding punch 32 into the inside of the third intermediate material 19, the outer peripheral surface of the tip portion of the holding punch 32 and the die are inserted. The main portion 7 is sandwiched between the inner peripheral surface 37 of 33 and the third convex portions 35 and 35 are allowed to enter the pockets 9 and 9 without rattling. As a result, as shown in FIG. 11, the column portions 17, 17 constituting the third intermediate material 19 are sandwiched between the third convex portions 35, 35 adjacent to each other in the circumferential direction. To do. In this state, the processing surface 39 provided on the lower surface of the pressing die 34 is strongly pressed against the other side surface of the flange portion 8 by the elasticity of the spring 41, so that the other side surface of the flange portion 8 is the processing surface. Plastically deformed into a shape that matches 39. Once the collar portion 8 is formed in this manner, the cage 4 is completed by performing necessary finishing and the like.

As described above, in the case of the roller bearing retainer manufacturing method of the present embodiment, when burring is performed on the radially inner portion of the second intermediate material 16, as shown in FIGS. Similarly, in order to position the inner peripheral edge portion of the second intermediate material 16 in the circumferential direction by the first convex portions 30, 30 formed on the outer peripheral surface of the punch 20 a or the intermediate portion, Can be prevented from moving in the circumferential direction. Further, from the middle of the burring process, as shown in FIGS. 4 (E), (F) and 6, the second convex portions 31 and 31 formed on the outer peripheral surface of the base end portion of the punch 20a are used to The both sides of the circumferential direction of each pillar part 17 and 17 which comprise the two intermediate material 16 are guided. Therefore, in the case of the present embodiment, it is possible to prevent the column portions 17 and 17 from being inclined or twisted in the circumferential direction when the burring process is performed. Further, in the case of the present embodiment, when forming the collar portion 8 constituting the third intermediate material 19, as shown in FIGS. 10 to 11, each of the first formed on the outer peripheral surface of the tip end portion of the holding punch 32. The three convex portions 35, 35 and the fourth convex portions 38, 38 formed on the inner peripheral surface of the die 33 allow the column portions 17, 17 constituting the third intermediate material 19 to be respectively viewed from both sides in the circumferential direction. Hold it. For this reason, when performing the said shaping | molding process, it can prevent that said each pillar parts 17 and 17 deform | transform. As a result, in the case of the present embodiment, the quality of the cage 4 can be improved.

  When the present invention is carried out, as shown in FIG. 12, among the inner peripheral edge portions on one side surface of the second intermediate material 16a, each concave portion 14 on the inner peripheral edge of the second intermediate material 16a in the circumferential direction. , 14 can be formed with imposition recesses 40, 40 in advance. If such an imposition recess 40 is formed, as shown in FIG. 4, when the burring process is performed on the radially inner portion of the second intermediate material 16a, the punch 20a is processed in the progress of the burring process. Each of the first protrusions 30, 30 formed on the outer peripheral surface of the first and second protrusions can run on the respective imposition recesses 40, 40 from the respective recesses 14, 14. Thereby, even after the engagement between the first convex portions 30 and 30 and the concave portions 14 and 14 is released, the relationship between the first convex portions 30 and 30 and the imposition concave portions 40 and 40 is established. Based on the alignment, positioning of the inner peripheral edge portion of the second intermediate material 16a in the circumferential direction can be achieved.

In the embodiment described above, the present invention is applied to the manufacturing method of the retainer 4 provided with the flange portion 8, but the present invention is not provided with a flange as shown in FIG. 21 described above. The present invention can also be applied to the manufacturing method of the container 4a. The present invention is not limited to the above-described embodiments, and in particular, with respect to a method for performing burring, for example, the present invention can be applied to the manufacturing methods of the respective embodiments described in Patent Document 1.

The perspective view of the 1st, 2nd pushing part which comprises the punch used in Example 1 of this invention. The figure seen from the lower part of FIG. AA sectional drawing of FIG. The half part sectional view showing the situation where burring processing is performed to the 2nd intermediate material in order of a process. BB sectional drawing of FIG. CC sectional drawing of FIG. The perspective view of a control punch. The figure seen from the lower part of FIG. DD sectional drawing of FIG. Sectional drawing which shows the condition which performs a shaping | molding process on a collar part in order of a process. EE sectional drawing of FIG. The fragmentary perspective view which shows another example of the 2nd intermediate material which can be employ | adopted when implementing this invention. The fragmentary sectional view of the self-aligning roller bearing incorporating the cage. FF sectional drawing of FIG. 15 which takes out and shows a holder | retainer. GG sectional drawing of FIG. The partial perspective view which looked at the holder | retainer from the outer peripheral side. The partial perspective view similarly seen from the inner peripheral side. The figure which shows the manufacturing method of the conventional cage | basket in order of a process. Sectional drawing of the half part which shows the implementation state of the conventional burring process in order of a process. The partial perspective view similarly seen from the inner peripheral side. The figure similar to FIG. 17 which shows the holder | retainer of another structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Spherical roller 4, 4a Cage 5 Outer ring raceway 6 Inner ring raceway 7 Main part 8 Gutter part 9 Pocket 10 Guide ring 11 Concave part 12 Tongue piece 13 First intermediate material 14 Concave part 15 Through hole 16, 16a Second intermediate part Material 17 Pillar part 18 Band part 19 Third intermediate material 20, 20a Punch 21, 21a Guide part 22, 22a First pushing part 23, 23a Second pushing part 24 Tapered surface part 25 Cylindrical surface part 26 Die 27 Upper surface 28 Suppression die 29 Lower surface Reference Signs List 30 First convex portion 31 Second convex portion 32 Holding punch 33 Die 34 Stamping die 35 Third convex portion 36 Upper surface 37 Inner peripheral surface 38 Fourth convex portion 39 Work surface 40 Imposition concave portion 41 Spring

Claims (3)

  Manufactures roller bearing cages that are made of metal plates and have a cylindrical main part and pockets that are formed at multiple locations in the circumferential direction of the main part and that can hold rollers in a rollable manner. Therefore, by punching the metal plate, the whole is an annular shape, the shape of the inner peripheral edge is a waveform related to the circumferential direction, and the through holes are formed at a plurality of positions in the circumferential direction. After forming an intermediate material having an arch-shaped band part with an intermediate part in the circumferential direction protruding to one side in the radial direction from both ends at the part between the inner peripheral edge of the corrugation, the outer diameter of the tip part is in the middle A taper-shaped punch that is smaller than the inner diameter of the material and whose outer diameter of the intermediate portion and the base end portion is larger than the inner diameter of the intermediate material is inserted axially from the distal end side of the punch to the radially inner portion of the intermediate material. By pushing in, the above-mentioned belt portions are extended in the circumferential direction, For roller bearings, by plastically deforming the radially inner portion of the intermediate material into a cylindrical shape, the portion plastically deformed into the cylindrical shape is the main portion, and the portions corresponding to the through holes are the pockets. In the cage manufacturing method, as the punch, a convex portion that is long in the axial direction of the outer peripheral surface of the punch is formed in a portion of the outer peripheral surface that is in phase with the concave portion of the inner peripheral edge of the corrugation in the circumferential direction. A roller bearing retainer that uses a member formed with a portion and pushes the punch axially into the radially inner portion of the intermediate material while engaging each of the convex portions with the concave portions. Method.   Of the outer peripheral surface of the punch, in the plurality of circumferential directions of the axial base end portion than the portion where each convex portion is formed, each forms a second convex portion that is long in the axial direction of the outer peripheral surface of the punch, While guiding the circumferential side surfaces of each pillar portion existing between the respective through holes provided at a plurality of positions in the circumferential direction of the intermediate material by the circumferential side surfaces of the second convex portions, The method for manufacturing a roller bearing retainer according to claim 1, wherein an operation of pushing the punch in an axial direction into a radially inner portion of the intermediate material is performed.   After plastically deforming the radially inner portion of the intermediate material into a cylindrical shape, this portion is made the main portion, and then the main portion is sandwiched between the inner peripheral surface of the die and the outer peripheral surface of the punch, Each pillar portion existing between each pocket provided in a plurality of locations in the circumferential direction of the portion is formed on at least one peripheral surface of the inner peripheral surface of the die and the outer peripheral surface of the holding punch, respectively. The process for shape | molding the collar part which comprises a holder | retainer is performed to the radial direction outer side part of the said intermediate material in the state clamped from the circumferential direction both sides by one pair of convex parts. The manufacturing method of the roller bearing retainer described in any one of Claims 1.

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