JPS6038202A - Manufacture of wheel for caster - Google Patents

Abstract

PURPOSE:To simplify a structure to reduce a cost by placing two dished articles opposite each other at their outer flanges and connecting them through engaging parts, after forming the dished article by a dished blank formed of a disc-shaped blank. CONSTITUTION:On the manufacture, a disc-shaped blank is at first formed by stamping out a metal plate. Next the disc-shaped blank is processed by a drawing operation or the like so as to form a dished blank 2 having an outer flange 3 at a peripheral edge of a drum portion 2a thereof and a circular recess 4 at a bottom protion 2b thereof, respectively. Continuously the dished blank 2 is simultaneously stamped out at the center of the bottom portion 2b to form a shaft hole 5 and at the outer flange 3 to form an outer flange engaging groove 6. After one dished article A is thus formed, two dished articles are integrally connected with each other, while forming a rib 8 by fitting each of the outer flange bent parts 3a into the engaging groove 6 corresponding thereto, and accordingly a product is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing wheels used for casters of safes, desks, chairs, trolleys, etc.

Conventional wheels of this kind, as disclosed in Japanese Utility Model Application No. 54-53, are prepared in two types: a relatively large dish-shaped plate and a relatively small dish-shaped plate, and the bodies of both plate-shaped plates are fitted together. were formed together. Therefore, two types of dish-shaped plate bodies with different shapes and sizes must be formed using different pressing methods.In addition, since the body parts of both sides fit together, it is necessary to form each body part wide. However, it has the disadvantage that manufacturing is complicated and the cost is high.

In view of the above-mentioned circumstances, the present invention aims to eliminate the two drawbacks by providing a manufacturing method for caster wheels that can be easily manufactured using one type of dish-shaped body, and its characteristics are as follows. In this method, a disk-shaped blank is drawn or forged to form a dish-shaped blank having an outer flange at the edge of the body layer, a shaft hole is bored in the center of this dish-shaped blank, and an outer flange is formed in the outer flange. A short gun is formed by drilling fitting grooves of an appropriate length concentrically. 7. The peripheral edge of the shaft hole and the outer flange are bent to form a dish-shaped body, and the two dish-shaped bodies are assembled as a set and then removed. The flange sides are brought into contact with each other, the outer flange bent portions are fitted into opposing fitting grooves, and the outer flange bent portions are caulked onto the gun.

Next, embodiments will be described based on the features described above with reference to the accompanying drawings.

First, a metal plate (not shown) is punched out to form a disc-shaped blank 1 shown in FIG. 1D.

Next, the disc-shaped blank 1 is drawn or forged to form a dish-shaped blank 2 shown in FIGS. 2(A) and 2(B). In this case, an outer flange 3 is formed on the peripheral edge of the body 2a of the dish-shaped blank 2, and a circular recess 4 is formed on the bottom 2b.

Next, as shown in FIGS. 3(A) and 3(B), a shaft hole 5 is formed in the center of the bottom part 2b of the dish-shaped blank 2, and an outer flange fitting groove is formed concentrically with an appropriate length in the outer flange 3. 6 and punching at the same time
Do E. In this case, although a pair of outer flange fitting grooves 6 are illustrated, one or three or more may be provided. Further, the short gun 7 still remains in the part where the fitting groove 6 was formed.

Thereafter, as shown in FIGS. 4(A) and 4(B), the periphery of the shaft hole 5 of the dish-shaped blank 2 and the outer flange 3 are bent in the inner axial direction to form bent portions 5a and 3a.

In this way, one type of dish-shaped body A is formed, and two pieces are arranged as a set in this dish-shaped body so that the outer flange 3 sides are butted against each other, and the bent parts of both outer flange 3a into the opposing fitting grooves 6, respectively, and as shown in FIG.
(Semi-caulk the outer flange bent part 3a as shown in 0, then the 6th
As shown in Fig. (A), the outer flange bent portion 3a is attached to the short gun 7, and the three plate-shaped bodies A are integrally formed.

In this case, a rib 8 is formed on the central peripheral surface of the body portion 2a by caulking the outer flange bent portion 3a.

As described above, this invention involves drawing or forging a disc-shaped blank to form a dish-shaped blank having an outer flange on the circumferential edge of the body, and drilling an axial hole in the center of this dish-shaped blank. A short gun is formed by concentrically drilling an outer flange fitting groove of an appropriate length in the outer flange, and a dish-shaped body is formed by bending the periphery of the shaft hole and the outer flange. As a set, the outer flange sides are butted against each other, the bent portions of both outer flange are fitted into the opposing fitting grooves, and the bent portion of the outer flange is caulked to the short gun, so it is one type of dish type. It is now possible to manufacture a set of two bodies by fitting the bent parts of both outer flanges into the fitting groove and caulking the new bent part of the outer flanges to the short gun part of the fitting groove. The complexity of manufacturing each dish-shaped body through a separate press process is eliminated, improving efficiency and reducing costs. Furthermore, since there is no need to overlap the body parts of the dish-shaped body as in the conventional case, the inside of the body part can be small, and the absolute amount of material can be reduced. Moreover, since the bent portion of the outer flange is caulked to the short gun, a lip is formed on the central peripheral surface of the product of this invention, resulting in high strength. In addition, by fitting into the fitting groove 6 of the outer flange bent portion 3aK, the short gun 7 engages with the inner wall of the outer flange bent portion 3a and performs a positioning action, thereby preventing misalignment of the axes of the three dish-shaped bodies. It has excellent effects such as:

In addition, since the dish-shaped body can be plated and then caulked, both the outer and inner surfaces can be plated neatly, and manufacturing is simple.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a disc-shaped blank, Figure 2 (3) is a plan view of a dish-shaped blank, the second figure is a top view of the same palace, and Figure 3 (3) is a plan view of a dish-shaped blank.
4) is a plan view showing the state in which the shaft hole and the fitting groove are formed;
Figure (2) is a plan view of the same ``Gosho'', Figure 4 (A) is a plan view showing the state where the shaft hole periphery and outer flange are bent, 4th drawing is a view of the same ``Gosho'', and Figure 5 is a half-view of the same ``Gosho''. Plan view showing the crimped state (Fig. 5)
0 is a front view of the same as above, Fig. 5 (0 is a sectional view of the same as above, Fig. 6 (a)
is a perspective view of the product, and the sixth drawing is a sectional view of the same. 1. Disc-shaped blank 2. Dish-shaped blank 3. Outer flange 5. Shaft hole 6. Fitting groove 7. Short gun 7-0 ('J 8 Arrangement dimension method

Claims (1)

[Claims] A disc-shaped blank is drawn or forged to form a dish-shaped blank having an outer flange on the circumferential edge of the body; 1. A shaft hole is bored in the center of this dish-shaped blank, and the outer flange is fitted into the outer flange. A short flange is formed by drilling matching grooves of an appropriate length concentrically, and 1. the peripheral edge of the shaft hole and the outer flange are bent to form a dish-shaped body, and the two dish-shaped bodies are used as a set to form the outer flange. Manufacture of a caster wheel characterized in that the sides are butted against each other, the bent portions of both outer flanges are fitted into opposing fitting grooves, and the bent portions of the outer flanges are caulked to the short rib. Method.