RU2202435C2 - Apparatus for riveting articles such as serpantine retainers of rolling bearings - Google Patents

Abstract

FIELD: plastic metal working, possibly manufacture of high-accurate riveted articles such as serpantine retainers of rolling bearings. SUBSTANCE: apparatus includes upper riveting tool with cavities for each rivet in the form of truncated cones and lower riveting tool, both mounted with possibility of motion one relative to another. Apparatus also includes mechanism for preliminary orientation having diametrically arranged on lower riveting tool mounting base with cavity in the form of truncated cone and compensating base with cross section in the form of equilateral trapezium. Said bases are designed for diametrically placed rivets. Lower riveting tool has supporting plane for remaining rivets. Upper riveting tool is provided with ball support. EFFECT: enhanced quality of riveting. 3 dwg

Description

 The invention relates to the field of metal forming and can be used for the manufacture of precision riveted units, mainly for riveting serpentine bearings deep groove bearings.

 A device is known for riveting separators of rolling bearings, comprising a housing with a coaxially mounted upper movable and lower stationary riveting tool, a tool tray for locating the bearing mounted on the lower riveting tool and a power drive of the upper riveting tool with a power cylinder spring-loaded relative to it. Before riveting, the upper riveting tool presses the bearing against the lower riveting tool, squeezing the cages together. Then the upper riveting tool is moved by an amount equal to the height of the deformable part of the rivet shaft by moving the roller along the inclined end surface of the slide (see ed. St. USSR 1668008, IPC B 21 J 15/32, publ. 07.08.91, bull. 29 )

 A disadvantage of the known device is that the movement of the upper riveting tool is carried out in stages by a different amount. With a wide range of dimensional values of the thickness of the separators, the height of the rivets, it is impossible to obtain a high-quality rivet.

 A stamp is known for riveting of serpentine cages of rolling bearings, containing upper and lower plates movable relative to one another with ring riveting tools mounted on them, parallel guide rails for feeding bearings into the riveting zone, a mechanism for preliminary separation of the cage and a mechanism for removing the finished cage. The stamp is equipped with an element of additional orientation and fixation of the separator (see ed. St. USSR 642071, IPC B 21 J 15/32, publ. 15.01.79, bull. 2).

 A disadvantage of the known device is the low accuracy of the riveted parts due to the complex orientation system of the separator by several mechanisms.

 The closest technical solution is a device for riveting serpentine cages of rolling bearings, containing upper and lower ring riveting tools movable relative to one another, a preliminary orientation mechanism with supports for the cage and trays for loading and unloading bearings (see ed. St. USSR 829309, IPC B 21 J 15/32, publ. 15.05.79, bull. 18).

 A disadvantage of the known device is the low quality of riveting, since the position of the cage depends on the orientation of the bearing on the spring-loaded tool tray.

 The task of the invention is to improve the quality of riveting of serpentine bearings of rolling bearings, regardless of the accuracy of manufacture of the assembled parts.

 This object is achieved in that in the known device for riveting products such as serpentine cages of rolling bearings, containing movably mounted relative to each other upper riveting tool with cavities for each rivet and lower riveting tool, as well as a preliminary orientation mechanism, according to the invention, the latter is made in the form of diametrically located on the bottom riveting tool and designed for two diametrically located rivets of the mounting base with a cavity in IU truncated cone and a compensating base-sectional profile in the form of an isosceles trapezium, the lower riveting tool arranged to the reference plane for the remaining rivet, the upper riveting tool provided with a ball bearing, and its cavity under each rivet made frustoconical.

 The proposed set of features allows you to compensate for errors in the center-to-center distance between rivets and distortions between the upper and lower riveting tools.

Figure 1 shows a General view of the device;
figure 2 - upper riveting tool;
figure 3 - lower riveting tool.

 The riveting device consists of the upper 1 and lower 2 riveting tools, which are centered one on the other by the guide columns 3. In the upper riveting tool 1, cavities of a truncated cone 4 are made for each rivet and clamps 5 are placed for preliminary pressing of the outer bearing ring and clamps 6 for the half separator . The clamps 5 are pressed by Belleville springs 7, and the clamps 6 are spring-loaded by a spring 8. The nuts 9 adjust the tension of the Belleville spring 7. To compensate for distortions between the slide and the press table (not shown), the upper riveting tool 1 is equipped with a ball bearing 10 and is connected to it by a threaded rod 11, equipped with a latch 12.

 In the lower riveting tool 2, to compensate for the errors of the center-to-center distance, diametrically positioned mounting base 13 with a cavity of a truncated cone and a compensating base 14 in the form of an isosceles trapezoid are made. All other rivet heads will be supported by the small base of the truncated cone on a single plane 15, playing the role of support.

 The device operates as follows.

 Semi-separators with balls are combined with the mounting base, the outer and inner rings are installed in the upper riveting tool 1 and fixed with the lower tool 2. Before riveting with Belleville springs 7, the clamps 5 press the outer ring all the way, and the spring-loaded clamps 6 half-separators.

 The rivets are installed in a vertical position, one end of each rivet enters the cavity of the truncated cone 4 of the upper riveting tool 1, the second ends of the rivets are placed in the lower riveting tool 2. In this case, two diametrically located rivets fall on the installation 13 and compensation 14 base, the rest rely on the supporting plane 15, everything is centered, and riveting occurs.

 Placing one end of the rivet heads on the compensation and mounting base of the lower 2 riveting tool, and the other ends in the cavities of the truncated cone 4 of the upper 1 riveting tool, allows riveting to compensate for the errors of the center-to-center distance between the rivets, which improves the quality of riveting of the serpentine half-separators of rolling bearings, regardless of the accuracy of the assembly details.

Claims (1)

 A device for riveting products such as serpentine cages of rolling bearings, comprising a movable upper riveting tool with cavities for each rivet and a lower riveting tool, as well as a preliminary orientation mechanism, characterized in that the preliminary orientation mechanism is made in the form of diametrically arranged on the lower riveting tool and designed for two diametrically located rivets of the installation base with a cavity in the form of a truncated cone and null method with base-sectional profile in the form of an isosceles trapezium, the lower riveting tool arranged to the reference plane for the remaining rivet, the upper riveting tool provided with a ball bearing, and its cavity under each rivet made frustoconical.

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