JPH0124582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for fixing bearing rings to adjacent members for manufacturing a rolling bearing member having raceway surfaces of rolling elements and bearing rings arranged concentrically with each other. This invention relates to a method comprising providing at least one bearing ring with a radially protruding fixing ear or the like, and hardening the raceway surface of the bearing ring.

As a rolling bearing member manufactured according to the above manufacturing method, German patent publication DE-AS2105122
The one disclosed in is publicly known. However, when manufacturing a rolling bearing using this manufacturing method, an unacceptable degree of hardening delay occurs during quenching in the vicinity of the ears of the raceway surface. In order to cope with this problem, a large amount of polishing allowance is taken for the raceway surface, but this increases the polishing time considerably and, moreover, differences in hardness remain on the raceway surface. As a result, the life of the bearing is shortened.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the drawbacks of the above-mentioned known manufacturing methods, and in particular to provide a method for manufacturing a rolling bearing member that does not cause hardening delays during quenching and the disadvantages associated therewith.

This object is achieved in the process described at the outset as follows.

That is, the raceway is manufactured as a body with an outer diameter of the maximum radius of the ears, and then grooves are formed on both sides of the body along the predetermined final outer contour of the raceway, and the raceways of the body with said grooves are formed. The object of the invention is achieved by hardening the surface parts and, after hardening, by breaking off the parts located radially outside the grooves and between the ears.

According to the present invention, a particular advantage is exhibited when the main body is selected to have a disc shape with the maximum radius of the ear portion.

According to this invention, first, the bearing ring is made almost as a rotating body, and when this rotating body is hardened, the entire circumference of the rotating body in the axial cross section is uniformly hardened. Further, since heat is absorbed uniformly, a uniform stress state can be obtained. Furthermore, if partial induction hardening is performed, the effect will be further improved.
In this way, since the rotating body is uniformly hardened, the hardening delay is negligibly small. the result,
It becomes possible to reduce the amount of polishing required when polishing the raceway surface, and the polishing time is greatly shortened.
Furthermore, the life of the rolling bearing member is significantly extended.

Here, it will be mentioned that the known injection molding method for thermoplastic plastics does not contribute in any way to the present invention. In the above injection molding method, a so-called runner part is provided between the nozzle of the material injection cylinder and the mold cavity of the injection mold, and a so-called gate part with a constricted cross section is provided at a position immediately before the mold cavity of the runner. A method is adopted in which the runner part can be easily removed by breaking it after injection molding. However, the runners in this method are for multi-cavity or long or complex flow injection molds. Therefore, this method is different in technical field from the present invention, and is not essentially related to hardening.

Furthermore, an advantage of the present invention is that by providing a radial groove on both sides of the main body that equally divides the portion between the ears on the radially outer side of the groove, This makes it possible to break off parts very easily.

If the invention is to be suitable for the purpose of fixing the brake saddle of a disc brake in a motor vehicle, it is advantageous if the outer race is provided with ears at two locations, each with a hole drilled therein.

The present invention will be explained below based on the accompanying drawings.

Shown in the figure is an outer raceway for securing a brake saddle (not shown) of a disc brake of a motor vehicle. The outer raceway ring 1 is provided with ears 3 at two locations for fixing the brake saddle, and each ear has one hole 2 bored therein. The outer raceway ring 1 is manufactured as follows so that the hardening delay during hardening of the raceway surface 4 is minimized and the above-mentioned advantages can be exhibited.

As shown in FIG. 1, the outer raceway ring 1 is forged as a substantially disk-shaped main body 5, and its outer shape matches the maximum radius of the ear portion 3. In this case, grooves 6 are cut into the main body 5 on both sides along the predetermined final external contour of the outer raceway 1.

Further, the ear portions 3, 3 are provided on the radially outer side of the groove 6.
On both sides of the part 7 located between them, radial grooves 8, 8 are cut, which part 7 evenly divides. These grooves 8, 8 divide the part 7 into individual segments 7a to 7d.

The body 5 with the grooves 6 and 8 is subsequently induction hardened in the region of the raceway surface 4 after undergoing other machining operations which are not of great importance in the context of the invention. After this hardening, as shown in Figure 3,
Each segment 7a to 7d is broken off along grooves 6 and 8 to separate them in the direction of the arrow. That is, the grooves 6 and 8 form a cross section 9 that is intended to be broken off between the notches on each surface, as shown in FIG. 2a (-cross section in FIG. 1). . and the second
As shown in the figure, the segment 7c is broken off at the grooves 6 and 8 to obtain the outer raceway 1 (second b
figure). Thereafter, the raceway surface 4 is polished in the usual manner.

FIG. 4 shows a - cross section of FIG. 1, and clearly shows that the outer raceway ring 1 is used in a double-row angular contact ball bearing in which the rolling elements are balls 10.

What I would like to mention here is that in addition to the hole 2 in the ear part 3, a plurality of holes (not shown) are provided in the inner part of the groove 6 in the circumferential direction in order to attach the outer raceway ring 1 to the vehicle body. The point is that they can be evenly distributed.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, in which the outer race ring is a plan view immediately after being hardened into a disc-shaped main body, Fig. 2a is a cross-sectional view taken from Fig. 1, and Fig. 2b
The figure is a view after segment 7c is broken off in Figure 2a, Figure 3 is a plan view showing the state in which each segment in Figure 1 is broken off and separated from the outer raceway ring, and Figure 4 is a - sectional view of FIG. 1...(Outer) raceway ring, 2...Hole, 3...Ear part,
4... Raceway surface, 5... Main body, 6... Groove (along the outer contour of the raceway ring), 7... Portion located radially outward of the groove (along the outer contour of the raceway ring), 8
... (radial) groove, 10 ... rolling element.

[Claims]

1. Prepare a wound bushing workpiece tapered toward the end at one end, ○a. Fit the wound bushing workpiece into the cavity from the cavity opening of the die and hold it there. ○B Insert the lower punch and the pressing punch into the cavity of the die, press the wound bushing workpiece held therein in the axial direction, bend the tapered part of the workpiece radially outward, and at the same time bend the outer peripheral surface of the bent part. To generate a pressing force from the outer circumferential surface of the flange that is being formed by restraint toward the central axis of the wound bushing workpiece, to generate plastic flow there and to form a flange without any defects. ○C Cavity of die The process of inserting an ejection punch into the cavity and taking out the rolled bush product with a flange remaining inside the cavity is essential for the flange part, where each process of ○I○RO○HA is carried out simultaneously and sequentially. A method for manufacturing a rolled bushing bearing with a flange. 2. A lower mold consisting of a die holder, a lower punch, a fixed table, a rotary table, a plurality of dies, a die return device, and a locking device for the rotary table, a loading punch, a pressing punch, an ejecting punch,

Claims (1)

3. The method of manufacturing a rolling bearing member according to claim 1, wherein radial grooves are provided on both sides of the main body to equally divide the portion. 4. Claims characterized in that the outer raceway has two ears for fixing a brake saddle of an automobile disc brake, and each ear has one hole bored therein. A method for manufacturing a rolling bearing member according to item 1 or 2.