JP2020051577A - Ribbon cage - Google Patents

Abstract

To prevent the adhesion between the seating surface of a head of a rivet and the front side plate surface of a first cage component, which is a component of a ribbon cage, from being deteriorated due to burrs generated when a shank of the rivet is pressed into a first rivet hole of the first cage component.SOLUTION: A component having a hollowed-out portion 2d is used as a first cage component 2, in which the hollowed-out portion is continuous from a first rivet hole 2c to the front side plate surface 2f of the first cage component 2 and is formed having a larger diameter than the shank 4a of a rivet 4. Burrs 4e generated from the shank 4a of the rivet 4 when pressed into the first rivet hole 2c are accommodated only in an annular gap g between the hollowed-out portion 2d and the shank 4a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waveform holder.

  Conventionally, in a deep groove ball bearing, a waveform retainer that holds a plurality of rolling elements interposed between inner and outer raceway surfaces has been employed. Wave cages are generally assembled by joining first and second cage parts with studs. These retainer parts are parts that form one side of each pocket of the waveform retainer and one side of each tack hole that passes through the waveform retainer in the axial direction. These cage parts are generally formed by pressing a steel plate.

  A large load may act on the waveform holder due to a difference in the revolution speed of the rolling element due to centrifugal force due to high-speed rotation, misalignment, or the like. For example, in a deep groove ball bearing used for an automobile transmission, a high load is applied to the bearing, and the bearing may be used in a high misalignment state. If the applied load is large and excessive misalignment occurs, some balls will be loaded and some will not be loaded, and the contact angle between the balls and the raceway will change, and the balls will have different revolution speeds. Lag lead. Due to the delay of the ball, abrasion occurs at the pocket portion of the waveform holder, and in some cases, the ball may be broken.

  As a countermeasure to prevent the wear and the like, for example, a nitrocarburizing treatment for forming a nitrocarburized layer by infiltrating nitrogen into the cage component is performed, and the surface of the cage component is hardened to improve the durability of the wave cage. That is being done. As a method of the nitrocarburizing treatment, first, there is a method of performing a nitrocarburizing treatment on the retainer intermediate which is temporarily fixed by pressing a rivet into the first rivet hole of the first retainer component. There is a method of performing nitrocarburizing treatment in a state of a first cage component alone (for example, Patent Document 1).

  In the first method described above, in the case of the nitrocarburizing process, a space for the tack is required to arrange the retainer intermediate body including the first retainer component and the tack, whereas in the second method, The first cage components can be arranged relatively densely. Therefore, the second method can increase the number of processes compared to the first method, and can provide a waveform holder at low cost.

Japanese Patent No. 6098720

  However, in the case of the above-mentioned second method, the torso body is pressed into the stud hole portion hardened by the nitrocarburizing treatment. As a result, burrs are likely to be generated from the trunk. When the above-mentioned burrs accumulate between the seat surface of the head of the stud and the front side plate surface of the first cage component, the adhesion between the crimped stud and the first cage component is deteriorated. There is a possibility that the degree of adhesion between the first and second cage components is reduced, and the strength of the waveform cage is adversely affected.

  In view of the above-mentioned background, the problem to be solved by the present invention is that a burr generated when a body portion of a stud is pressed into a first stud hole portion of a first retainer component which is a component of a waveform retainer. An object of the present invention is to prevent the adhesion between the seat surface of the head and the front plate surface of the first cage component from being deteriorated.

  In order to achieve the above object, the present invention provides a first retainer component having a first tack hole, a second retainer component having a second tack hole, the first retainer component and the second retainer component. A stud that joins the retainer parts, wherein the stud is press-fitted into the first stud hole and passed through the second stud hole, and has a larger diameter than the trunk. In a waveform retainer integrally having a head contacting the front plate surface of the first retainer component and a caulked portion contacting the front plate surface of the second retainer component, the first retainer component is Having a steal portion that is continuous from the first stud hole to the front side plate surface of the first cage component and has a larger diameter than the body of the stud, and is press-fitted into the first stud hole. In this case, when the rivet is formed, burrs generated from the body of the tack are contained only between the stealing part and the body.

  According to the waveform retainer according to the above configuration, the body of the stud is press-fitted into the first stud hole, and the stud portion continuous between the first stud hole and the front plate surface of the first cage component. It is not press-fitted, and at the time of press-fitting, it is squeezed into the first stud hole and the burr generated from the body is settled only between the stolen part and the body, so the seat surface of the head of the stud and the first retainer It is possible to prevent the adhesion between the component and the front plate surface from being deteriorated by the above-mentioned burrs.

  Specifically, it is preferable that the stealing portion of the first retainer component has a shape that expands in diameter from the first tack hole toward the front side plate surface of the first retainer component. With this configuration, since there is no step due to the diameter difference between the first tack hole and the steal portion, stress concentration at the boundary between the first tack hole and the steal portion can be reduced.

  The stealing part of the first retainer component may be formed by a broken surface generated when the first tack hole is subjected to shearing. In this case, the post-processing for forming the steal portion by machining after the shearing of the first stud hole is unnecessary, so that the waveform retainer can be inexpensive.

  Further, it is preferable that the second rivet hole has a flank which partially forms a gap between the second rivet hole and the body of the rivet. With this configuration, while providing the close contact portion between the trunk portion and the second tack hole portion to fix the position of the trunk portion with respect to the second tack hole portion, the gap between the flank surface of the second tack hole portion and the trunk portion is used. The contact area between the two tack holes and the body can be reduced, and the residual stress generated in the second tack holes can be reduced.

  Further, it is preferable that the flank of the second tack hole is formed only at a position facing the body of the tack in the circumferential direction. In this case, the distance between the second tack hole and the inner or outer diameter of the second cage component does not become short, so that it is possible to avoid adversely affecting the strength of the second cage component.

  Considering the present invention as a method of manufacturing a waveform retainer, a first retainer component having a first tack hole, a second retainer component having a second tack hole, the first tack hole, and the Using a rivet integrally having a torso hole passing through the two rivet holes and a head larger in diameter than the torso portion, press-fitting the rivet torso into the first rivet hole portion, and then A rivet inserting step in which a tip is protruded from the second rivet hole portion, and the first retainer component and the second retainer component are joined by caulking the rivet arranged in the rivet inserting step. In the method of manufacturing a waveform retainer to perform, the first retainer component used in the rivet insertion step, there is a interference between the body of the rivet used in the rivet insertion step. It has a stealing portion that is continuous from the first tack hole to the front side plate surface of the first cage part and has a larger diameter than the body. An annular gap formed between the stealing portion and the body portion of the stud in the tacking step has a volume capable of accommodating a burr generated from the body portion of the stud that is pressed into the first stud hole portion. Is equivalent to

  According to the manufacturing method according to the above configuration, in the rivet inserting step, the body of the rivet is pressed into the first rivet hole, and the stealing is continued between the first rivet hole and the front plate surface of the first retainer component. It is not press-fitted into the portion, and an annular gap is formed between the steal portion and the body of the tack. For this reason, at the time of the press-fitting, even if burrs are generated from the body portion by being squeezed into the first tack hole portion, the generated burrs can be retained in the above-described annular gap. Thus, the adhesion between the seat surface of the head of the stud and the front plate surface of the first cage component is prevented from being deteriorated by the above-mentioned burrs.

  Specifically, it is preferable that the stealing portion of the first retainer component has a shape that expands in diameter from the first tack hole portion so as to be closer to the front plate surface of the first retainer component. In this case, since there is no step due to the difference in diameter between the first tack hole and the stealing part, the insertability of the body into the first tack hole does not deteriorate, and stress concentration due to the step is reduced. Can be avoided.

  The stealing part of the first retainer component may be formed by a broken surface generated when the first tack hole is subjected to shearing. With this configuration, it is possible to eliminate the need for post-processing for forming the stolen portion by machining after the shearing of the first tack hole portion.

  Further, it is preferable that the volume of the annular gap is set to be larger than the volume of the press-fit portion forming the interference within the trunk portion of the stud. In this case, the entire amount of the burr can be accommodated in the annular gap.

  Further, it is preferable that the first retainer component used in the rivet insertion step is one in which the entire surface of the first rivet hole is subjected to a soft nitriding treatment. In this case, since the nitrocarburizing process of the first cage component is performed before the rivet inserting process, the number of nitrocarburizing processes is increased to reduce the manufacturing cost of the waveform retainer, and the seat surface of the rivet head is reduced. And the adhesion between the first retainer component and the front side plate surface can be improved.

  In addition, it is preferable that a second tack hole of the second retainer component used in the tack insertion step has a clearance surface formed so as to partially enlarge a gap between the tack and the body of the tack. When the rivet is swaged in the fastening process after the rivet insertion process, a portion of the body protruding from the second rivet hole is crushed. At this time, the trunk portion expands in the second tack hole, and a tensile residual stress is generated in the second tack hole. If the residual stress exceeds the fatigue limit, fatigue failure occurs in the second cage component. If the gap between the second rivet hole used in the rivet insertion process and the trunk of the rivet is partially enlarged in advance by the flank, by performing the fastening process, the body and the second rivet hole can be removed. While maintaining the position of the torso with respect to the second stud hole by providing a close contact portion, leaving a gap between the flank of the second stud hole and the trunk to reduce the contact area between the second stud hole and the trunk The residual stress generated in the second tack hole can be reduced.

  Further, it is preferable that the flank of the second tack hole is formed only at a position facing the body of the tack in the circumferential direction. If the flank surface of the second tack hole is formed at a position radially opposed to the body, the distance between the second tack hole and the inner or outer diameter of the second cage component becomes shorter, so the second It becomes difficult to secure the strength of the cage component. On the other hand, if the flank of the second rivet hole is formed only at a position facing the body in the circumferential direction, the distance between the second rivet hole and the inner or outer diameter of the second retainer component is reduced. Can be avoided and the strength of the second cage component is adversely affected.

  As described above, the present invention adopts the configuration of the above-mentioned waveform retainer, and the head of the tack is formed by burrs generated when the body of the tack is pressed into the first tack hole of the first retainer component. Adhesion between the seat surface and the front plate surface of the first cage component does not deteriorate, and the strength of the waveform cage can be stably obtained.

Sectional drawing which shows the mode of the rivet insertion process of the waveform holder which concerns on 1st embodiment of this invention. Sectional drawing which shows the ball bearing provided with the waveform retainer which concerns on 1st embodiment. The figure which shows the initial stage of the tacking process in the manufacturing method of the waveform holder which concerns on 1st embodiment. The figure which shows a mode that the trunk | drum of the tack was pressed into the first tack hole from the initial stage of FIG. 3A. Sectional drawing which shows the state which completed the rivet insertion process through the trunk | drum of a rivet in the 2nd rivet hole from the stage of FIG. 3B. Sectional drawing which shows a mode that a fastening process is implemented from the state of FIG. 3C. Sectional view showing first retainer parts and tacks used in the tacking process Side view showing the second tack hole of the second cage component used in the tacking process Sectional drawing which shows the 2nd tack hole part of FIG. Sectional view showing a first tack hole portion and a steal portion according to the second embodiment.

  Hereinafter, a waveform holder according to a first embodiment as an example of the present invention will be described with reference to FIGS.

  The waveform holder 1 shown in FIGS. 1 and 2 uniformly holds a predetermined number of balls B in the circumferential direction between the inner ring R1 and the outer ring R2. The inner ring R1 and the outer ring R2 each serve as a race for deep groove ball bearings. The waveform retainer 1 and the inner and outer rings R1, R2 are coaxially arranged. Here, the direction along the coaxial axis is referred to as "axial direction", the direction perpendicular to the axis is referred to as "radial direction", and the circumferential direction around the axis is referred to as "radial direction". It is called "circumferential direction". The axial direction corresponds to the horizontal direction in FIGS. 1 and 2, and the radial direction corresponds to the vertical direction in FIGS. 1 and 2.

  The waveform holder 1 includes a first holder component 2 forming one axial side (right side in the figure) of the waveform holder 1 and a second holder forming the other axial side (left side in the figure) of the waveform holder 1. It comprises a retainer component 3 and a plurality of tacks 4 for joining the first retainer component 2 and the second retainer component 3 together. The waveform retainer 1 joins the first retainer component 2 and the second retainer component 3 that are axially aligned so as to sandwich the ball B interposed between the inner and outer rings R1 and R2 with a plurality of studs 4. Assembled by.

  The first cage component 2 shown in FIG. 2 has pocket half portions 2a constituting one axial side of the pocket portion for holding the ball B and joining plate portions 2b alternately in the circumferential direction. The second retainer component 3 has, in the circumferential direction, pocket half portions 3a constituting the other axial side of the above-described pocket portions and joining plate portions 3b alternately. The joining plate portion 2b and the joining plate portion 3b each have a front plate surface along the radial direction and a mating surface located on the back side of the front plate surface, and the mating surfaces overlap each other in the axial direction. I have.

  The stud 4 has a body portion 4a axially penetrating the joining plate portion 2b and the joining plate portion 3b, and a head portion 4b having a larger diameter than the body portion 4a and in contact with the front side plate surface of the joining plate portion 2b. And a caulking portion 4c that comes into contact with the front side plate surface of the joining plate portion 3b.

  As shown in FIG. 2, the joining plate portion 2 b of the first retainer component 2 includes a first stud hole portion 2 c which is in close contact with the entire circumference of the body portion 4 a of the stud 4, and a stud hole formed from the first stud hole portion 2 c. 4 has a stealing portion 2d that is larger in diameter than the first rivet hole 2c up to the opening end 2e on the side of the head 4b.

  As shown in FIG. 2, the joining plate portion 3b of the second cage component 3 has a second rivet hole portion 3c through which the trunk portion 4a of the rivet 4 is passed. Most of the second rivet hole 3c is in close contact with the body 4a so as to fix the body 4a to the second cage component 3 in the radial and circumferential directions. The remaining portion of the second tack hole 3c is a flank 3d that forms a gap with the body 4a. The flank 3d is formed only at a position facing the body 4a in the circumferential direction.

  The first tack hole 2c is a hole into which the trunk 4a of the tack 4 is press-fitted. On the other hand, the stealing portion 2d and the second tack hole 3c are holes formed with a larger diameter than the body 4a, that is, holes into which the body 4a is not press-fitted.

  The first cage component 2 and the second cage component 3 are each formed of a steel plate. The steel sheet can be subjected to a soft nitriding treatment. As the steel sheet, for example, SPCC defined in JIS G 3141: 2011 “Cold rolled steel sheet and steel strip” of Japanese Industrial Standard can be mentioned.

  In the nitrocarburizing treatment, heat treatment is performed at a low temperature of about 500 to 610 ° C., which is lower than the transformation temperature of iron of the treated product, and N, C, and O elements are infiltrated into the iron to form a surface of the treated product with an iron nitride layer. It means a surface treatment for improving abrasion resistance and the like as a (compound layer). As the nitrocarburizing treatment, for example, a salt bath nitrocarburizing method such as an isonite treatment (registered trademark) can be mentioned.

  The stud 4 is formed of a steel material. The steel material can be subjected to a soft nitriding treatment. As the steel material, for example, S10C specified in JIS G 4051: 2016 “Carbon steel for machine structure” of Japanese Industrial Standard can be mentioned.

  3A to 3C, using the first retainer part 2, the second retainer part 3, and the rivet 4, press-fit the body 4a of the rivet 4 into the first rivet hole 2c, A rivet inserting step of arranging the tip of 4a so as to protrude from the second rivet hole 3c is shown. FIG. 3D shows a fastening step of caulking the studs 4 arranged in the stud inserting step to join the first cage part 2 and the second cage part 3 together. FIG. 4 shows an enlarged view of the first retainer component 2 and the tack 4 used in the tacking step. FIG. 5 shows the front side plate surface of the second retainer component 3 used in the tacking step, and FIG. 6 shows a cross-section of the central portion of the second retainer component 3 in the radial direction along the circumferential direction. Note that FIG. 1 illustrates the details of the first retainer component 2 and the studs 4 in the state of FIG. 3B.

  As shown in FIGS. 1 and 4, the first retainer component 2 used in the rivet insertion step includes a first rivet hole 2 c formed in a cylindrical surface along the axial direction, and the first rivet hole 2 c. To the front side plate surface 2f of the first retainer component 2 and a steal portion 2d formed to have a larger diameter than the first tack hole portion 2c. The stealing portion 2d is shaped so as to increase in diameter from the first tack hole portion 2c to the front side plate surface 2f of the first retainer component 2. The front side plate surface 2f is formed in a flat surface along the radial direction. The open end 2e of the steal portion 2d forms a boundary with the front plate surface 2f.

  The first tack hole portion 2c and the steal portion 2d are formed by shearing and post-processing. That is, after a through hole including the first tack hole portion 2c is formed by a shearing process for forming a hole in the plate portion serving as the joining plate portion 2b, the edge of the punched hole formed in the front side plate surface is chamfered by a machine. The steal portion 2d is formed by post-processing.

  The first cage component 2 used in the tacking step is formed by performing the above-described soft nitriding treatment after forming the whole. Therefore, the first cage component 2 is also one in which the entire surface of the first tack hole portion 2c is subjected to a soft nitriding treatment. In the nitrocarburizing process, it is possible to simultaneously process a large number of first cage parts 2 not combined with the studs 4.

  The trunk 4a of the rivet 4 used in the rivet setting process has a shape in which the base end side continuous with the head 4b has a large diameter, and the front end side opposite to the base end has a small diameter so as to have a small diameter. ing. A round shaft portion having a diameter D is formed on the base end side of the body 4a. The diameter D is larger than the inside diameter d of the first tack hole 2c and smaller than the inside diameter of the stealing part 2d. That is, the interference (d-D) is set between the first tack hole portion 2c and the round shaft portion of the body portion 4a. The diameter of the body 4a between the round shaft portion and the tip is smaller than the inner diameter d of the first tack hole 2c.

  As shown in FIG. 3A and FIG. 3B, in the rivet inserting step, the trunk 4 a of the rivet 4 is passed through the steal part 2 d and the first rivet hole 2 c from the tip thereof. At this time, as shown in FIGS. 1 and 3B, of the round shaft portion of the body portion 4a, a portion near the tip is press-fitted into the first tack hole portion 2c. At that time, an annular gap g is formed between the non-press-fit portion located inside the steal portion 2d and the steal portion 2d in the round shaft portion.

  The volume of the annular gap g is set to be larger than the volume of the press-fit portion forming the above-mentioned interference (d-D) in the trunk portion 4a of the tack 4. The press-fit portion of the body portion 4a is a portion having a diameter difference of (d-D) among the round shaft portions of the body portion 4a shown in FIG. 3A and FIG. This is a portion that forms an axial region located inside the one tack hole 2c. The axial width of the axial region is smaller than the axial width of the annular gap g.

  As shown in FIGS. 3A to 3B, when the body 4a of the stud 4 is pressed into the first stud hole 2c from the steal part 2d of the first retainer part 2, the round shaft part of the body 4a is attached to the steal part 2d. It is not squeezed, but squeezed after reaching the first tack hole 2c. When the round shaft portion of the body 4a is struck by the first tack hole 2c, burrs 4e (scrap) may be generated from the body 4a as shown in FIG. In the first embodiment, while the entire surface of the first tack hole 2c is hardened by the nitrocarburizing treatment, the body 4a is not subjected to the hardening treatment such as the nitrocarburizing treatment, and the first tack hole 2c is hardened. Is also a soft part. For this reason, in particular, the body portion 4a is pressed into the first tack hole portion 2c under the condition that the burr 4e is easily generated.

  The burr 4e is moved to the stealing part 2d by being squeezed by the first tack hole 2c and turned or torn off from the body 4a. The amount of the burrs 4e is at most equivalent to the volume of the press-fit portion forming the interference (d-D) described above. Since the volume of the annular gap g is larger than the volume of the press-fit, all the burrs 4e generated from the body 4a can be accommodated in the annular gap g.

  As shown in FIG. 1, the head 4b of the rivet 4 used in the rivet insertion step has a seat surface 4d that can make surface contact with the front side plate surface 2f of the first retainer component 2 around the open end 2e of the stealing portion 2d. . The seat surface 4d is formed in an annular shape along the radial direction. When the body portion 4a is pressed into the first rivet hole 2c until the seat surface 4d of the rivet 4 contacts the front side plate surface 2f of the first retainer component 2, the opening end 2e of the stealing portion 2d and the seat of the rivet 4 are provided. There is no possibility that the burrs 4e enter between the surfaces 4d. Since the step of press-fitting the body 4a into the first tack hole 2c is performed at a high speed, the seat surface 4d of the tack 4 is attached to the first retainer part 2 after the body 4a starts being squeezed into the first tack hole 2c. The time until the contact with the front side plate surface 2f is very short, and in that time, the burr 4e accumulates on the seat surface 4d of the stud 4 and the space between the seat surface 4d and the front side plate surface 2f of the first retainer part 2 as it is. It is thought that it is almost impossible to be sandwiched between the two.

  When the body portion 4a is pressed into the first tack hole portion 2c as shown in FIGS. 1 and 3B, the tack at the tack portion 4 is temporarily fixed to the first retainer component 2 by friction at the press-fit portion. The purpose of the temporary fixing is as shown in FIG. 3C, by passing the second rivet hole 3c of the second cage part 3 through the body part 4a and the bonding plate part 3b and the bonding plate part 2b of the first cage part 2. Are superimposed on each other, and of the dies P1 and P2 for caulking the rivet 4, the posture of the rivet 4 is maintained until the head 4b is received by the die P1 on the head 4b side.

  As shown in FIGS. 3C, 5, and 6, the second cage component 3 used in the tacking step has been subjected to soft nitriding similarly to the first cage component 2. The second retainer component 3 has a second tack hole 3c that penetrates the joining plate 3b in the axial direction. Most of the second rivet hole 3c is formed of a pair of arcuate surfaces in the radial direction formed so as to overlap with the first rivet hole 2c in the axial direction. It consists of a pair of flank surfaces 3d whose diameter increases in the direction.

  The flank 3d is formed only at a position facing the body 4a in the circumferential direction. The flank 3d has an arcuate shape that is deepest in the circumferential direction at the center of the radial width of the joining plate portion 3b and becomes shallow in the circumferential direction from the center toward both sides in the radial direction. In a state in which the body portion 4a has been press-fitted, a gap is formed between the entire surface of the portion of the body portion 4a located inside the second rivet hole portion 3c and the second rivet hole portion 3c. An enlarged gap is formed between the surface and the surface 3d.

  As shown in FIG. 3D, in the fastening step, the trunk 4 a protruding from the second tack hole 3 c in a state where the head 4 b of the tack 4 temporarily fixed to the first tack hole 2 c is received by the mold P <b> 1. Is hit with a mold P2, so that the body 4a is crushed from the tip to form a caulked portion 4c. When the studs 4 are crimped in this manner, the joining plate portion 2b of the first retainer component 2 and the joining plate portion 3b of the second retainer component 3 are joined so as to be in close contact with each other. At this time, as the trunk portion 4a is crushed from its distal end portion, a diameter expansion deformation occurs in the first tack hole portion 2c, the steal portion 2d, and the second tack hole portion 3c. For this reason, the trunk portion 4a after the fastening process is in close contact with the first tack hole portion 2c, and is in close contact with most of the second tack hole portion 3c, but the flank 3d of the second tack hole portion 3c. Forms a gap with the body 4a. For this reason, the contact area between the second rivet hole 3c and the body 4a is reduced by leaving a gap between the body 4a and the flank 3d as compared with the case where the second rivet hole is formed into a cylindrical surface. Thus, the residual stress generated in the second tack hole 3c is reduced.

  As described above, in the waveform retainer 1 according to the first embodiment, the first retainer component 2 is continuous from the first rivet hole 2c to the front side plate surface 2f and is larger than the body 4a of the rivet 4. It has a steal portion 2d formed with a large diameter, and a burr 4e generated from the body portion 4a of the stud 4 when pressed into the first stud hole portion 2c fits only between the steal portion 2d and the body portion 4a. (See FIGS. 1 and 2), the adhesion between the seat surface 4d of the stud 4 and the front side plate surface 2f of the first retainer component 2 is not deteriorated by the above-described burr 4e, and the strength of the waveform retainer 1 is further increased. Can be obtained stably.

  In addition, in the waveform retainer 1, the annular gap g shown in FIG. 1 is substantially eliminated by expanding the diameter of the body 4a by the fastening process shown in FIG. 3D, but the amount of the burr 4e is reduced. 3D, even if the body 4a is expanded and deformed, only the burr 4e is compressed between the stealing portion 2d and the body 4a as shown in FIG. 3D. There is no concern that the stud 4 will be caught between the seat surface 4d of the stud 4 and the front side plate surface 2f of the first cage component 2. An annular gap may be left after the fastening process to prevent the burr 4e from being compressed between the steal part 2d and the body part 4a. Such a specification is local to the steal part 2d that presses the burr 4e. This is suitable when it is desired to prevent the occurrence of stress concentration points.

  In addition, the waveform retainer 1 according to the first embodiment has a shape in which the stealed portion 2d expands in diameter so as to be closer to the front plate surface 2f from the first tack hole 2c. The stress concentration at the boundary between the first tack hole 2c and the stealing portion 2d can be reduced without having a step based on the diameter difference between the stealing portions 2d.

  Further, in the waveform holder 1 according to the first embodiment, the second rivet hole 3c has the flank 3d that partially forms a gap between the second rivet hole 3c and the body 4a of the rivet 4 (FIGS. 3D and 3D). 6), the flank 3d of the second rivet hole 3c and the torso are provided while fixing the position of the trunk 4a with respect to the second rivet hole 3c by providing a close contact portion between the trunk 4a and the second rivet hole 3c. The contact area between the second rivet hole 3c and the body 4a can be reduced by the gap between the rivets 4a, and the residual stress generated in the second rivet hole 3c can be reduced. For this reason, even under a high load and high misalignment environment, bearing operation can be performed without causing damage to the waveform retainer 1 from the second tack hole 3c.

  In the waveform holder 1 according to the first embodiment, the flank 3d of the second rivet hole 3c is formed only at a position facing the body 4a of the rivet 4 in the circumferential direction. The distance between the portion 3c and the inner or outer diameter of the second cage component 3 is not reduced by the flank 3d, so that the strength of the second cage component 3 can be prevented from being adversely affected.

  Further, in the method of manufacturing the waveform retainer 1 according to the first embodiment, the first retainer component 2 used in the rivet insertion step is set between the body part 4a of the rivet 4 used in the rivet insertion step (d− D), since there is a steal portion 2d which is continuous from the first tack hole portion 2c with the front side plate surface 2f of the first retainer component 2 and has a larger diameter than the body portion 4a (FIGS. 1, FIG. 4), the body portion 4a of the rivet 4 is pressed into the first rivet hole portion 2c in the rivet inserting step, and the stealing is continued between the first rivet hole portion 2c and the front side plate surface 2f of the first retainer component 2. An annular gap g is formed between the stealing portion 2d and the trunk portion 4a of the rivet 4 without being pressed into the portion 2d. Since the annular gap g has a volume capable of accommodating the burrs 4e generated from the body 4a of the rivet 4 to be press-fitted into the first rivet hole 2c, the annular gap g is pressed into the first rivet hole 2c when the press-fitting is performed. Even if burrs 4e are generated from the trunk 4a, the burrs 4e that have occurred are retained in the annular gap g, and are placed only between the stealing portion 2d and the trunk 4a. Since the fastening process is performed in this state, the adhesion between the seat surface 4d of the stud 4 and the front side plate surface 2f of the first retainer component 2 is not deteriorated by the burrs 4e.

  As described above, the method of manufacturing the waveform retainer 1 according to the first embodiment uses the rivet 4 e generated when the body 4 a of the rivet 4 is pressed into the first rivet hole 2 c of the first retainer component 2. 4 can be prevented from being inferior in adhesion between the seat surface 4d of the fourth member 4 and the front side plate surface 2f of the first cage component 2.

  In the method of manufacturing the waveform retainer 1 according to the first embodiment, the steeper portion 2d of the first retainer component 2 is closer to the front side plate surface 2f of the first retainer component 2 from the first tack hole 2c. Since there is no step due to the diameter difference between the first rivet hole 2c and the stealing portion 2d, the insertability of the body 4a into the first rivet hole 2c in the rivet insertion process is improved. In addition, stress concentration at the boundary between the first tack hole portion 2c and the stealing portion 2d can be reduced.

  In addition, in the method of manufacturing the waveform retainer 1 according to the first embodiment, the volume of the annular gap g is smaller than the volume of the press-fit portion forming the interference (d-D) in the body 4a of the stud 4. Since it is set large, even if the burr 4e is generated to the maximum, the entire amount of the burr 4e can be accommodated in the annular gap g.

  In the method of manufacturing the waveform retainer 1 according to the first embodiment, the first retainer component 2 used in the rivet insertion step is obtained by subjecting the entire surface of the first rivet hole 2c to nitrocarburizing. The seating surface 4d of the stud 4 and the front side plate surface of the first cage component 2 are reduced while increasing the number of nitrocarburizing processes to be performed on the first cage component 2 before the inserting process to reduce the manufacturing cost of the waveform cage 1. Adhesion with 2f can be ensured.

  Further, in the method for manufacturing the waveform retainer 1 according to the first embodiment, the second rivet hole 3c of the second retainer component 3 used in the rivet insertion step partially removes the gap between the rivet 4 and the body 4a. (See FIGS. 3C, 5, and 6), and by performing a fastening step, a contact portion between the body portion 4a and the second rivet hole portion 3c is provided. The contact area between the second rivet hole 3c and the body 4a while leaving a gap between the flank 3d of the second rivet hole 3c and the body 4a while fixing the position of the body 4a with respect to the two rivet hole 3c. Thus, the residual stress generated in the second tack hole 3c can be reduced.

  Although other heat treatments such as annealing may be effective in reducing the residual stress in the second tack hole, it is preferable to reduce the residual stress only by partially forming the second tack hole in a flank. Is preferred in terms of cost. Also, it is conceivable to reduce the residual stress by further loosening the fitting of the body of the stud and the first stud hole, the second stud hole, but in this case, the temporary fixing of the stud becomes unstable, There is a possibility that a stud is removed from the first stud hole.

  In the method of manufacturing the waveform retainer 1 according to the first embodiment, the flank 3d of the second rivet hole 3c is formed only at a position facing the body 4a of the rivet 4 in the circumferential direction. The distance between the two stud holes 3c and the inner or outer diameter of the second retainer component 3 is not reduced by the formation of the flank 3d, so that the strength of the second retainer component 3 is not adversely affected. it can.

  In addition, the flank is provided with a contact portion between the body portion of the tack and the second tack hole portion in the fastening step to fix the position of the trunk portion with respect to the second tack hole portion in the radial direction and the circumferential direction, and An appropriate number, arrangement, and shape can be adopted as long as the residual stress generated in the hole can be reduced. In the illustrated example, the plurality of flank surfaces 3d are arranged symmetrically in consideration of the balance of the expansion deformation of the trunk portion 4a, but the flank surfaces may be formed at only one place. In addition, in order to reduce the residual stress in the second tack hole after the fastening step, it is not necessary to form the flank 3d in an arcuate surface, but it may be formed in a polygonal shape of a triangle or more. When the flank is polygonal, when the load enters the second cage component, stress concentrates on the corners, which may lead to breakage. To avoid stress concentration.

  In the first embodiment, the stolen portion 2d is formed by machining after the first rivet hole portion 2c is sheared, but the first rivet hole portion and the stolen portion can be simultaneously processed. FIG. 7 shows a second embodiment as an example. In the following, only differences from the first embodiment will be described.

  The first cage component 5 according to the second embodiment is formed by a series of shearing processes in which the first tack hole portion 5a and the stolen portion 5b are drilled toward the front plate surface 5c of the first cage component 5. (The punching direction is indicated by an arrow in the figure).

  The first tack hole portion 5a is formed by a sheared surface, a fractured surface, and a sheared surface generated by the shearing process. The inner diameter of the first tack hole 5a is defined in the shear plane.

  The steal portion 5b is formed by a fractured surface generated by the shearing process. Here, the fracture surface is a surface formed by the growth of a crack (crack) generated by shearing, and is rougher than the shear surface. The diameter of the stealing part 5b is increased by controlling the direction of the crack. The direction of cracking can be controlled by processing conditions such as ductility of the material, tool clearance, and roundness of the cutting edge.

  In the waveform holder according to the second embodiment and the method of manufacturing the same, the stealing portion 5b is formed by the fractured surface generated when the first tack hole 5a is subjected to shearing processing. The post-processing of forming the steal portion 5b after the shearing processing becomes unnecessary, and the waveform holder can be made inexpensive.

  In each of the above embodiments, the rivet setting process is performed using the first cage component that has been subjected to the nitrocarburizing process. However, the rivet is temporarily fixed in the first rivet hole of the first cage component. It is also possible to nitrocarburize the vessel intermediate. In this case, since the body of the tack can be pressed into the first tack hole before curing, it is excellent in that burrs are less likely to occur. On the other hand, the number of treatments cannot be increased, which is disadvantageous in terms of cost.In addition, when the second retainer part is overlapped on the retainer intermediate and the torso portion of the cured tack is swaged, the second tack hole portion is formed. Residual tensile stress is more likely to occur. Therefore, the second tack hole portion including the flank is particularly suitable when a manufacturing method in which the cage intermediate in which the tack is temporarily fixed to the first cage component is subjected to nitrocarburizing treatment is employed.

  The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Waveform retainer 2, 5 First retainer component 2c, 5a First tack hole portion 2d, 5b Steal portion 2f, 5c Front side plate surface 3 Second retainer component 3c Second tack hole portion 3d Relief surface 4 Tack 4a Body Part 4b head 4c crimping part 4d seating surface 4e burr g annular gap

Claims (5)

A first retainer component having a first tack hole portion, a second retainer component having a second tack hole portion, and a tack for joining the first retainer component and the second retainer component,
The stud is press-fitted into the first stud hole and passed through the second stud hole, and is in contact with a front side plate surface of the first retainer part, the trunk having a larger diameter than the trunk. In the waveform retainer integrally having a head and a caulked portion that contacts the front side plate surface of the second retainer component,
The first retainer component has a steal portion that is continuous from the first tack hole portion to the front side plate surface of the first retainer component and has a larger diameter than the body of the tack,
A wave retainer wherein burrs generated from the body of the tack when pressed into the first tack hole are contained only between the stealing part and the body.   2. The waveform holder according to claim 1, wherein the stealing portion of the first cage component is shaped such that the diameter increases from the first tack hole portion toward the front side plate surface of the first cage component. 3.   3. The waveform holder according to claim 1, wherein the stealing portion of the first cage component is formed by a broken surface generated when the first tack hole is sheared. 4.   4. The waveform holder according to claim 1, wherein the second tack hole has a flank that partially forms a gap between the second tack hole and the body of the tack. 5.   The waveform retainer according to claim 4, wherein the flank of the second tack hole is formed only at a position facing the body of the tack in the circumferential direction.

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