JP2005321027A - Retainer for roller bearing and manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the manufacturing cost by forming a recess 6c for supplying lubricating oil without shaving thereof. <P>SOLUTION: A manufacturing method of a retainer 1 for an outside diameter guiding method bearing is provided with the recess 6c for supplying lubricating oil in the outside diameter surface of a pillar 6. A pocket forming range 16a of a retainer material 16 is punched with an inside diameter side punch 12 and an outside diameter side die 14 to form a pocket 10. At the same time in the punching, pillar forming ranges 16b, 16b of the retainer material 16 are plastically deformed by compression of both opposite surfaces of the punch 12 and the die 14 to plastically work the recess 6c. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cage in which needle rollers are incorporated in a roller bearing such as a needle roller bearing and a method for manufacturing the same.

Conventionally, roller bearings with cages are bearings with excellent rotational performance used for rotating parts of various machines and engine parts of automobiles. A conventional cage included in such a roller bearing will be described with reference to FIG. 5. The cage 100 includes two annular rib portions 102 facing each other with an interval in the axial direction. Both rib portions 102 are integrally connected by a plurality of column portions 104 arranged in a row at a predetermined interval in the circumferential direction. The rib portions 102 and the column portions 104 adjacent to each other define a roller storage pocket portion 106. Roller pawls 108 protruding toward the pocket portion 106 are formed on the outer peripheral edge and the inner peripheral edge of the pillar portion 104 in the circumferential direction. On the outer diameter surface of the column portion 104, recesses 110 for supplying lubricating oil are formed on both side surfaces in the axial direction of the roller pawl 108. The concave portion 110 is formed by machining, and the pocket portion 106 is formed by drilling. The pocket portion 106 holds the rollers 112 (see Patent Document 1). The above-mentioned machining process takes time to manufacture the cage and becomes a factor that increases the manufacturing cost.
JP 2000-352423 A

  The problem to be solved by the present invention is to enable the reduction of the manufacturing cost by forming the concave portion for supplying the lubricating oil without using the machining process.

  A roller bearing retainer according to the present invention is an outer diameter guide type roller bearing retainer provided with a recess for supplying lubricating oil on an outer diameter surface of a column portion defining a pocket portion, the recess being When the pocket portion is formed, the pocket portion is formed by being subjected to plastic deformation by pressing from the radial direction. According to this roller bearing retainer, since the concave portion is formed by plastic deformation when the pocket portion is drilled, the pocket portion is formed by machining after machining the pocket portion as in the conventional case. The structure becomes unnecessary, the cutting process can be reduced, and the manufacturing cost can be easily reduced.

  A method of manufacturing a roller bearing retainer according to the present invention is a method of manufacturing an outer diameter guide type roller bearing retainer having a recess for supplying lubricating oil on an outer diameter surface of a column portion defining a pocket portion. When forming the pocket portion by punching the pocket portion forming region of the cage material, the column portion forming region of the cage material is pressed from the radial direction and plastically deformed to form the concave portion. It is characterized by.

  According to this method for manufacturing a roller bearing retainer, since the recess is formed by plastic deformation when the pocket portion is formed, it is necessary to form by machining after the pocket portion is formed as in the prior art. Therefore, the manufacturing process can be reduced, and the manufacturing process can be easily reduced.

  The roller bearing retainer manufacturing method preferably includes a pressing work surface that is convexly bulged on both sides in the circumferential direction around the die hole on each of the outer diameter side and the inner diameter side of the cage material. A die and a punch having a pressing surface that is recessed concavely on both sides in the circumferential direction with the protruding blade as the center are arranged, and drilling is performed with the die and the punch in the pocket portion forming region of the cage material. At the same time, the pocket portion is formed, and at the same time, the columnar portion forming region is pressed from both sides in the radial direction by both pressing surfaces of the die and the punch, and the concave portion is formed. According to this method for manufacturing a roller bearing cage, a recess for supplying lubricating oil can be formed at the same time as punching and forming a pocket portion in a pocket portion forming region of the cage material with a punch and die. The machining process can be reduced, and the manufacturing cost can be reduced. In particular, since the punch and the die are used as they are for forming the recess for supplying the lubricating oil, the equipment cost, the equipment cost, etc. can be greatly saved or reduced, and the manufacturing cost can be further reduced.

  According to the present invention, the recess for lubricating oil supply to the outer diameter surface of the column portion is formed by plastic processing performed when forming the pocket portion, not by machining, so that the machining can be reduced. The manufacturing cost can be reduced.

  Hereinafter, a roller bearing retainer according to the best mode of the present invention will be described in detail with reference to the accompanying drawings. The present invention is applied to a needle roller bearing as a roller bearing. FIG. 1 is a partial longitudinal sectional view of a needle roller bearing retainer (hereinafter simply referred to as a retainer), FIG. 2 is an enlarged sectional view taken along the line AA, and FIG. 3 is a view of manufacturing the retainer of the present invention. In the method, a perspective view of a punch, a die, and a cage material, and FIG.

  The cage 2 is made of steel or the like and has an outer diameter guide system. The cage 2 integrally connects two annular rib portions 4 facing each other with an interval in the axial direction by a plurality of column portions 6 arranged in the circumferential direction at a predetermined interval. The rib portion 4 and the column portions 6 adjacent to each other define a pocket portion 10 that accommodates a roller 8 made of bearing steel or the like.

  The column part 6 is located in the center when viewed in the axial direction of the cage 2 and is located on both sides in the axial direction of the column center part region 6a that forms a loose arc shape radially inward. It consists of column end regions 6b, 6b that extend straight toward both ends in the axial direction and are integrally connected to the rib portion 4. The outer diameter surface of the column central region 6a forms a concave portion 6c that is recessed inward in the radial direction, and the inner diameter surface forms a convex portion 6d that protrudes inward in the radial direction. Roller pawls 6e that protrude toward the pocket portion 10 are formed on the inner and outer edges in the radial direction of the column end regions 6b and 6b.

  The cage 2 having the above configuration has a die placed on the inner diameter side of a cage metal material such as a thin metal plate formed into a cylindrical shape by pressing or a punch on the outer diameter side. In addition, punching is performed on the pocket forming region of the cage material with a punch to form the pocket portion, and at the time of drilling the pocket portion, the outer diameter surface of the cage material is pressed from the radial direction at the same time. The outer diameter surface is dented in the pressing direction, and the concave portion is formed by plastic deformation.

  Hereinafter, with reference to FIG. 3 and FIG. 4, the manufacturing method of the holder | retainer 2 of this invention is demonstrated.

  FIG. 3 shows an external perspective view of the punch 12, the die 14, and a part of the cage material 16. The cage material 16 is shown in a part of the circumferential direction for convenience of illustration.

  The punch 12 is arranged on the inner diameter side of the cage material 16, and the blade portion 12 a that protrudes in a cross-sectional shape corresponding to the cross-sectional shape of the pocket portion 10 on the surface facing the cage material 16 in the arrangement state. And press working surfaces 12b and 12b that are recessed in a curved shape along the axial direction on both sides in the circumferential direction with the blade portion 12a as the center when viewed from the cage material 16 in the arrangement state. The pressing surfaces 12b and 12b are surfaces for processing the column central region 6a of the column portion 6.

  The die 14 is arranged on the outer diameter side of the cage material 16, and the blade portion 12 a of the punch 12 corresponds to the sectional shape of the pocket portion 10 on the surface facing the cage material 16 in the arrangement state. Has a die hole 14a of a required depth that can be inserted, and in the arrangement state, the die hole 14a is centered on the die hole 14a when viewed from the cage material 16 and is axially corresponding to the concave curved surface shape on both sides in the circumferential direction. It has press working surfaces 14b and 14b that bulge and protrude along a convex curved surface. The pressing surfaces 14b and 14b are surfaces for processing the column central region 6a of the column portion 6.

  The cage material 16 is alternately provided with pocket portion forming regions 16a and column portion forming regions 16b in the circumferential direction as shown by phantom lines that divide the region for convenience of understanding in FIG. The rib portion forming regions 16c and 16c are provided along the circumferential direction.

  With the above configuration, the punch 12 and the die 14 function as a drilling tool for the pocket portion forming region 16a of the cage material 16 and the column portions on both sides in the circumferential direction of the pocket portion forming region 16a in the cage material 16. It also becomes a pressing tool provided with pressing surfaces 12b, 12b; 14b, 14b for pressing the forming regions 16b from both sides in the radial direction. As the pressing tool, the punch 12 and the die 14 are configured to have only a punching tool for the pocket forming region 16a of the retainer material 16, and the punch 12 and the die 14 are separately provided on both sides in the circumferential direction. What integrated the member press processing tool can also be used as a press processing tool.

  As shown in FIG. 4A, a die 14 is placed on the outer diameter side of the cage material 16 with its die hole 14a facing the cage material 16, and the punch 12 protrudes on the inner diameter side of the cage material 16. The blade portion 12a is disposed toward the cage material 16, and the protruding blade portion 12a of the punch 12 is aligned with the die hole 14a of the die 14, and then the punch 12 is moved as shown in FIG. The cage material 16 is pushed toward the pocket forming region 16a. Although not shown, the punch 12 is fixed to the upper die set and movable downward, for example, and the die 14 is fixed to the lower die set, and the holder is interposed between the punch 12 and the die 14. A material 16 is arranged. By pushing the punch 12, the pocket portion forming region 16a of the cage material 16 is punched, and the pocket portion 10 is formed in the pocket portion forming region 16a. Simultaneously with the drilling process, the columnar portion forming region 16b of the retainer material 16 is sandwiched between the pressing process surfaces 12b and 14b of the punch 12 and the die 14 and is radially formed by the pressing process surfaces 12b and 14b. The concave portion 6c is plastically processed in the columnar portion forming region 16b of the cage material 16 by being pressed and pressed from both sides. Then, when the cage material 16 is removed from the punch 12 and the die 14, the cage 2 as shown in FIG. 4C is obtained. The roller pawl 6e can be formed in a later process.

  In the above description, when the punch 12 is disposed on the outer diameter side of the cage material 16 and the die 14 is disposed on the inner diameter side of the cage material 16, the punch 12 is pivoted on both sides in the circumferential direction with the blade portion 12 a as the center. The press working surfaces 12b and 12b swelled in a convex curved shape along the direction, and the die 14 is formed as the pressing processed surfaces 14b and 14b dented in the concave curved shape around the die hole 14a on both sides in the circumferential direction. Good.

  The present invention is not limited to the case of manufacturing a cage from a cylindrical cage material, but can be similarly applied to a welded type cage in which a belt-like base material is formed into an annular shape and both ends thereof are welded. it can. In this case, when the pocket portion is formed on the band-shaped base material before welding using the punch and the die, the concave portion may be formed at the same time, or the band shape formed into an annular shape after the welding. When forming a pocket part in a base material, you may form the said recessed part simultaneously.

  In the case of a welded cage, a pocket portion may be formed one by one with a punch and a die at the stage of a flat belt-like base material, or a punch having a plurality of protruding blade portions, corresponding to this. A plurality of pocket portions may be simultaneously formed by a die having a plurality of die holes. Using a plurality of punches each having a different size of the protruding blade part and a plurality of dies having die holes corresponding to each punch, a small pocket with a punch having the smallest protruding blade part and a die corresponding thereto Next, form a pocket with a medium size with a punch with a larger protruding blade and a corresponding die, and finally a protruding blade with a size corresponding to the pocket. You may form a pocket part with the punch which has and the die | dye corresponding to this. At this time, a pressing surface for forming a recess in the outer diameter surface of the cage material is provided on each of the punch and the die.

1 is a partial longitudinal sectional view of a cage according to the best mode of the present invention. AA line enlarged sectional view of FIG. Perspective view of punches and dies used for manufacturing the cage of the present invention The figure which shows the formation process of a crevice in time series at the time of formation of a pocket part Partial longitudinal sectional view of a conventional cage

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Roller bearing cage 4 ... Rib part 6 ... Column part 8 ... Roller 10 ... Pocket part 12 ... Punch 14 ... Die 16 ... Cage material

Claims (3)

  An outer diameter guide type roller bearing retainer provided with a recess for supplying lubricating oil on an outer diameter surface of a pillar portion defining a pocket portion, wherein the recess is formed from a radial direction when the pocket portion is formed. A roller bearing retainer formed by plastic deformation by pressing.   A method of manufacturing a roller bearing retainer of an outer diameter guide system having a recess for supplying lubricating oil on an outer diameter surface of a column portion that defines a pocket portion, and drilling a pocket portion forming region of the retainer material A method for manufacturing a roller bearing retainer, wherein when forming the pocket portion, the recess portion is formed by pressing the column forming region of the retainer material from the radial direction to plastically deform it. .   A die with a pressing surface that is convexly bulging on both sides in the circumferential direction around the die hole on each of the outer and inner diameter sides of the cage material, and both sides in the circumferential direction around the protruding blade A punch having a concavely depressed pressing surface is formed, and the pocket portion is formed in the pocket portion forming region of the cage material to form a pocket portion, and at the same time, both the die and the punch are formed. 3. The method for manufacturing a roller bearing retainer according to claim 2, wherein the concave portion is formed by pressing the column forming region from both sides in the radial direction with a pressing surface to be plastically deformed.

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