JPS58107234A - Manufacture of double row ball-and-roller bearing ring - Google Patents

Abstract

PURPOSE:To manufacture a double row ball-and-roller bearing ring by forming an inner ring member and outer ring member into a body, separating the bottom, separating it into an inner ring member and outer ring member, performing necessary working, and combining two inner ring members and two outer ring members to each other. CONSTITUTION:An intermediate member in which an outer ring having a single row rail and an inner ring having a single rail are connected to each other is formed by press working etc., and a unifying member C1 and a bottom part C2 are separated. Then, it is separated into an outer ring member C3 and an inner ring member C4, and necessary working is given. Two each members are prepared and two outer ring members C or two inner ring members C4 are connected to form unified outer ring or inner ring having double row rails. Then, this is finished to required size and a race of double row ball-and roller bearing is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an integrated raceway for a double-row rolling bearing such as a double-row tapered roller bearing or a double-row angular contact ball bearing.

An outline of the conventionally known manufacturing method of an integrated raceway ring for a double-row rolling bearing is as shown in Fig. 1. For example, swaging is performed to form the required shape A2, followed by die forging as shown in Figure (d). After forming it into a U-shape, separate the body and bottom to make A4 and A5, respectively, and then
The outer ring material A6 is formed by forging, press forming, etc. as shown in the figure te).

On the other hand, the two inner rings to be combined with the outer ring material are made of material Bl cut to a required size as shown in FIG. 2(a)vi.
After swaging and forming it into the required shape B2 as shown in Figure (b), and then forming it into a U-shape as shown in Figure (C) by die forging, the body part is formed as shown in Figure (d). The bottom parts are separated into B4 and B5, respectively, and the B4 is used as the inner ring material.

□ According to the above manufacturing method, the outer ring material and the inner ring material are manufactured in separate processes, so there are many steps, and the equipment cost is high.
Since Bs is generated, the material yield is poor and the material cost is high. On the other hand, instead of the raceway with the rear raceway made integrally by the above manufacturing method, a raceway with a single raceway is completed, and the two raceway members are integrally connected); We also tried making a double-row raceway ring, but this had advantages and disadvantages compared to the initial purpose. The present invention solves the above-mentioned drawbacks and provides a method for manufacturing a raceway ring with low equipment costs due to reduction in steps and a high material yield.

The present invention will now be described in detail with reference to FIGS. 3, 4, 5, and 6.

FIG. 3 is a block diagram schematically showing the steps of the conventional simultaneous forging method for outer and inner rings, and FIG. 4 shows the intermediate members formed in the steps of FIGS. After the parts are integrally molded, the integral part C1 and the bottom part C2
Figure 2 shows a state in which the outer ring member C3 and the inner ring member C4 are separated (bottom punching process) and separated into an outer ring member C3 and an inner ring member C4. FIG. 5 shows the first embodiment of the present invention.
An example is shown in which the outer ring member C3 molded in Fig. 4 is rough-machined on the plane part P and the outer diameter part, and then fixedly joined by a method such as welding at the plane part PK. Embodiment 2 of the integral type is shown, and the outer ring member is manufactured by the simultaneous outer and inner ring forging method shown in FIG. 3, similar to the outer ring of the tapered roller bearing, after rough machining of the plane part Q and the outer diameter part.
The flat portion QK is fixedly joined by a method such as welding to form an integral body, which forms the outer ring 2 of a double-row angular contact ball bearing.

As described above, the manufacturing efficiency of the outer ring member of a double-row rolling bearing, which is manufactured by the conventional simultaneous forging method for outer and inner rings, and the outer ring member of a double-row rolling bearing that is integrally joined by welding etc., is as follows: Compared to the manufacturing method shown in FIG. 2, the cost is much lower, so the equipment cost is also lower, and there is less need for removal, which results in material loss, making it possible to obtain an inexpensive outer ring material.

Although the method for manufacturing the integral outer ring has been described in the above embodiment, it goes without saying that the material for the inner ring can also be manufactured in the same manner as for the outer ring. Further, the method of joining the outer ring member or inner ring member having a single raceway is not limited to welding or the like.

[Brief explanation of the drawing]

Figures 1 (a) to (el) are cross-sectional views illustrating the outline of the forging process of a conventional integral outer ring, and Figure 3 is an illustration of the outline of the process of simultaneously forging the outer and inner rings with a conventional single-row raceway. The block diagram, FIG. 4 is a sectional view showing the shapes of (d) to (f+) in FIG. 3, and FIGS. 5 and 6 are embodiments of the present invention, and FIG. Fig. 6 shows the second embodiment. Explanation of symbols 1...Integrated outer ring P of double row tapered roller bearing...
...Flat part of the outer ring of a tapered roller bearing 2 ...Integrated outer ring of a double-row angular contact ball bearing Q ...Flat part of the outer ring of an uncu 2 ball bearing Patent applicant Nippon Oval Co., Ltd. Kudzu 4 figure-161- 41 yen J

Claims (1)

[Claims] In a method for manufacturing an integral bearing ring used in a double-row rolling bearing, in which one bearing ring with a double-row raceway is integral, and the other bearing ring corresponding thereto is a separate bearing ring with a single-row raceway. The integral raceway ring is manufactured by forming an intermediate member in which an outer ring with a single-row raceway and an inner ring with a single-row raceway are connected to each other by forging or pressing a molded member prepared in advance, and then forming the bottom of the integral raceway ring. After cutting, the member is separated into an outer ring member and an inner ring member, the outer ring member and the inner ring member are subjected to necessary processing, two or more of each are prepared, and then the outer ring member or the inner ring member is separated. A raceway ring for a double-row rolling bearing, characterized in that two members are joined together to form an integral outer ring or inner ring with a double-row raceway, which is then finished and formed to desired dimensions. manufacturing method.