JPS59118503A - Joining method of hub wheel fitting flange in axle housing or so - Google Patents

Abstract

PURPOSE:To enable beads to be formed simultaneously with upsetting process so as to remarkably improve the working efficiency by forming bead part shaping flutes and ridges on the metal mold which serves for upsetting process to both ends of an axle housing or so. CONSTITUTION:When a thick part 9 and a plurality of bead parts 10 are formed on both end parts of an axle housing 1 in order to mount a hub wheel mounting flange (not illustrated) on both end parts thereof, unupsetting and coining metal mold 2 is prepared. Said metal mold 2 is built up with a bottomed cylindrical cap 2A and a columnar core metal 2B having the diameter smaller than the inner diameter of the cylindrical part 4 of the cap. Four flutes 5 are formed on the inner wall face of the cylindrical part 4 thereof while four ridges 7 are formed on the external face of the core metal 2B at the position coinciding with said flutes 5, and both metals 2A and 2B are integrated with each other by screwing a thread 6 in a threaded hole. The metal mold 2 which is shaped as above is pressed on both end parts of the housing 1 to form the thick part 9 and bead parts 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the outer periphery of an axle housing, etc., in order to attach a hub wheel to an axle housing, dead axle, etc. (hereinafter referred to as "axle housing, etc.") constituting the axle portion of a vehicle such as a truck. This invention relates to a coupling method for fixing seven flanges provided in the axle housing to both ends of the axle housing, etc.

More specifically, in order to attach the hub wheel to both ends of the axle housing, etc. (the joint of the 7 flange), the 7 langes are connected by a fitting means, and the hub wheel is attached to both ends of the axle housing, etc. (the joint of the flange). If the diameter does not match the diameter of the fitting hole provided on the 7 lange side, by adding padding to both ends of the axle housing, etc., the diameter of the fitting hole will be larger than that on the 7 lange side. By forming a bead part and scraping off a part of the bead part, the diameter of the 7 lange is made to match the diameter of the 7 lange side, and by fitting the 7 lange to the bead part, it is possible to fit the 7 lange to both ends of the axle housing, etc. In the method for obtaining a seven-lunge connection, the object is to obtain the bead portion integrally by upsetting and coining the both ends of the axle housing or the like at the same time.

Generally, seven langes for attaching a hub wheel to the axle housing are connected to both ends of the axle housing. In order to connect this 7 lange to both ends of the axle housing, etc., the fitting hole is made R on the flange side so as to correspond to both ends of the axle housing, etc., and the axle housing, etc. is connected through the ti hole. Although a method of fitting both ends is generally used, it is extremely difficult to match the diameter of the fitting hole on the 7-lunge side and the diameter of both ends of the axle housing or the like. Therefore, it is necessary to match both ends of the axle housing, etc. with the fitting holes on the 7 lange side. Conventionally, the method of matching the fitting holes on the 7 lange side with both ends of the axle housing, etc. By forming the fitting hole on the flange side to be slightly larger in diameter than both ends of the axle housing, etc., and adding padding to both ends of the axle housing, etc., the fitting hole on the 7 lange side can be easily fitted. After machining it so that it has a larger diameter than the hole, a part of this built-up part (bead part) is shaved off by circular machining to match the fitting hole on the 7 lange side.

law is used. Specific methods for forming bead portions on both ends of an axle housing, etc. include directly applying build-up by welding, or fixing small pieces by welding, etc.
Both of the above methods are laborious because they are both done manually, and the workability is poor, such as the amount of overlay on the bead being likely to be uneven, and the post-work process of rounding to a perfect circle being time-consuming. In addition to the above problems, the welding heat dulls both ends of the axle housing, resulting in changes in the material and deformation, which impairs the quality of the axle housing.

The present invention attempts to improve the conventional problems as described above in order to solve them. That is, the present invention attempts to improve this in view of the fact that axle housings and the like are subjected to upsetting in order to form thicker parts at the necessary upper portions to provide strength at both ends thereof. The bead part is made to bulge out as a whole through the pressing force during the upsetting process, and more specifically, the upsetting process is achieved by providing a concave and convex strip for forming the bead part in the upsetting mold. The feature is that a bead portion is formed at the same time. The gist of the present invention is that the cap is formed into a cylindrical shape with a bottom, and the core metal is inserted into the center of the cap with an upsetting space between the cap and the inner wall surface of the cap, and the outer periphery of the core metal is inserted into the center of the cap. An upsetting mold is installed on the axle housing, etc., in which a plurality of protruding stripes are provided protruding along the longitudinal direction of the cap, and a plurality of four stripes are engraved on the inner periphery of the cap in correspondence with the protruding stripes. The molds are placed facing each other at both ends of the axle housing, and both ends of the axle housing are pressed in opposite directions while the ends of the axle housing are inserted into the upsetting space. The structure is such that the thick portion bulges toward the inner periphery and the plurality of bead portions bulge toward the outer periphery.

Specific embodiments of the present invention will be described below with reference to illustrative drawings.

In each drawing of FIG. 1 to FIG. 4, (1) shows an axle housing, and (2) (2) shows a mold for upsetting and coining. The same mold (2) has a cap (2A) and a core metal (2B)
The cap (2A) has a hollow portion (2A)' and is formed into a cylindrical shape with a bottom. More specifically, the cap (2A) is composed of a base (3) and a cylindrical part (4) that projects integrally from the base (3), and the hollow part (2A)' of the cylindrical part (4) is The axle housing (1) is formed with a diameter slightly larger than the outer diameter at both ends so that both ends of the axle housing (1) can be fitted loosely therein.Four strips (5) (5) are formed on the inner wall surface of the axle housing (1). ), (5) (57 are carved along the longitudinal direction with an appropriate displacement angle. Also, the base plate (
3) has a screw hole (6) located at its center.

On the other hand, the core metal (2B) is formed into a cylindrical shape with a smaller diameter than the inner diameter of the cylindrical portion (4). More specifically, the axle housing (1) is formed with a slightly smaller diameter than the inner diameter at both ends, and the outer peripheral surface thereof has grooves (5) (5), (5) provided on the cap (2A) side. )(
5) and four convex ridges (7) (7), (7)
(7) is provided protrudingly along the longitudinal direction. Also, concentric metal (2B
) A screw (8) is provided protruding from the bottom. And the core metal (
The mold (2) is formed by screwing the two screws (8) into the screw holes (6) while the two screws (8) are inserted into the hollow part (4) of the cylindrical part (4). .

The mold (2) (2) is provided so that its intermediate portion faces both ends of the axle housing (1) which is in a clamped state via a suitable clamping mechanism (not shown). And both molds (2) (2) hollow part (2/
)'(2A) When both ends of the axle clamp (1) are inserted into the (upsetting space), both molds (2
1 (2) in the relative direction, the both ends of the axle housing (1) are compressed and deformed through the pressing force, that is, the both ends of the axle housing (1) are compressed and deformed inwardly by the pressing force. There is a bulge and a thick wall (
9) is formed, while the protrusions (5) (5), (5) (5
) and grooves (4) (4), (4) The part corresponding to C47 bulges in the outer diameter direction, and the bead part 0Q00, (
10 (10 is formed.

In this manner, in a state where bead portions QO (10, α0 (10) are formed at both ends of the axle housing (1), the bead portions (It) Q6, (l() (l
A perfect circle is processed by cutting a part of [>]. Then, in a state where an outer diameter matching the fitting hole (not shown) formed on the flange (1) side is obtained through this perfect circular processing, the 7 langes αυ are fitted into the same part, and the first A bonded state as shown in the figure is obtained. Others (a) shows the knob wheel attached to the 7 langes αυ.

In the above embodiment, the four stripes (5) are provided on the inner periphery of the cap (2A), and the protruding strips (7) are provided on the outer periphery of the core bar (2B). Convex strip (7)
is not necessarily necessary, and if the amount of bead protrusion is small, it is possible to obtain the bead protrusion effect only with the four stripes (5) carved on the cap (2A) side.

The present invention is constructed as described above, and as shown in ]-, a mold for upsetting both ends of an axle no. By making the bead portion integrally bulge through the axle housing, it has become possible to form the bead portion at the same time as the upsetting process for both ends of the axle housing, etc. Since it is now possible to form the bead portion at the same time as the upsetting process, it is possible to improve the work efficiency compared to the conventional method described above, and to prevent irregularities in the bead portion. After that, we were able to smoothly perform round machining, and the workability was improved. In addition, it has been possible to avoid the adverse effects of welding heat and improve the quality.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the axle clamp with the 7 langes for hub wheel mounting attached to both ends, Figure 2 is an exploded perspective view of the mold, and Figure 3 is a perspective view of the axle nozzle clamp attached to both ends of the axle housing. A front view of the axle housing with the molds facing each other, FIGS. 4 and 5 are enlarged views of the mold and the end of the axle housing in the working state, and FIG. 6 is an enlarged view of the end of the axle housing after processing. FIG. (1) Axle housing, (2) mold, (2A) cap, (2B) core metal, (2A)' hollow part, (3) base,
(4) Cylindrical part, (5) Four threads, (6) Screw hole, (7) Convex thread, (8) Screw, (9) Thick wall part, αQ bead part, 0υ flange, (2) Hub wheel. Patent applicant: Daido Steel Co., Ltd. Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) Consists of a cap formed in a cylindrical shape with a bottom, and a core metal that is inserted into the center of the cap with an appropriate upsetting space between the inner wall surface of the cap and the inner circumference of the cap. By inserting both ends of the axle housing, etc. into the upsetting space, and pressing the upsetting mold in which a plurality of four strips are carved in the opposite direction, the axle housing, etc. A 7-lunge connection method is used to attach a hub wheel to an axle housing, etc., which is integrally provided with a thick wall portion that bulges toward the inner periphery and a bead portion that bulges toward the outer periphery at both ends of the axle housing.