JPS58134268A - Multistage pulley with multiple v-shaped groove and its manufacturing method - Google Patents

Abstract

PURPOSE:To prevent damage or breakage of multiple V-groove in a multistage pulley with a multiple V-groove formed by pressing a metal material by keeping the thickness of a peripheral portion where a multiple V-groove is formed equal to that of the metal material. CONSTITUTION:A metal material having a thickness t1 is used to form a bottom wall portion 3 having a thickness t2 thinner than the thickness t1. Peripheral wall portions 4, 6 with grooves having different outside diameters, the first side wall portion 5, the second side wall portion 7 and an opening end portion 8 are respectively formed by individual pressing working processes. Respective inner surfaces 10, 11 of the peripheral wall portions 4, 5 are substantially smooth surfaces, and the thickness of each peripheral portion is ensured to be equal to the thickness t1. Thus, a pulley material 12 is formed. V-grooves are formed on the peripheral wall portions 4, 6 by a well-known rolling roller, and V-grooves 13a, 13b and V-grooves 14a, 14b are respectively formed on the first peripheral wall portion 4 and the second peripheral portion 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiple V-grooved booby made of sheet metal, and particularly to a multiple V-grooved booby having two or more stages of multiple V-grooved sections with different diameters of the grooves.
This is related to the structure of the pulley with III.

Automatic engines (fans, water pumps,
Whether multiple V-grooved pulleys are used to drive a large number of rotating devices such as generators, etc., the rotational speed and driving force of each of the rotating devices may be different. It is necessary to obtain the maximum %* rotation Iir in the rotating rotation, and as engines become more sophisticated, the number of rotating devices 1 increases, and in order to rotate these rotating devices It at the same time (multiple V-grooved pulleys σ) There was a strong demand for a multi-stage σI multi-groove pulley with different groove diameters. However.

Using the conventional manufacturing method of bending a single metal plate to create a "pleat shape," it is extremely difficult to manufacture multiple V-grooved pulleys σ1 with different diameters. Regarding multi-stage pulleys with different diameters, a method was used in which five multi-V grooved pulleys with different outer diameters were manufactured in advance and the two were joined by welding, etc., but this This method has the disadvantage that the strength of the welded part is slightly weak, so it is easy to break during use, and the conventional method involves folding and crushing a single piece of metal material to form a peripheral wall, followed by rolling the grooves. In such cases, the metal crystals on the peripheral wall grow in different directions, and it is difficult to make the strength of the material uniform, causing buckling of the metal material. Groove σ] There were defects such as destruction, cracking, and cracking.

The purpose of the present invention is to solve the above-mentioned drawbacks all at once.■ Form a thin bottom wall part by press working the central part of the metal material.■ As in each molding process, the part corresponding to the Ft1112 part that forms the V groove is initially While maintaining the thickness of the metal material, other parts are expanded to create two or eight layers with different outer diameters.
``□A boot with a stepped peripheral wall part: Forming a material,''
Multiple V-grooves are formed in the 2-stage or 8-stage σ) 8 wall portion using a rolling roller.

Above σ) process, a single metal material is pressed to form a well-formed metal W @ wall part pn, 2 to 8 steps with different outer diameters σ) ■ A strong, lightweight multi-stage type with grooves. This is a molded pulley with multiple V grooves.

Examples will be explained below.

Fig. 1 shows a forming process according to the present invention, in which (a) is a metal material l having a thickness tl, the trunk) is elongated, and in the cup forming process, the outer circumference 1a' of the metal material l! ) Hold and press process (form the circular cup 2 by stretching the center of the metal material)
The plate thickness t1σ corresponding to approximately ]/2) of the bottom wall portion 8t-formation T; E-0) is pressed (more drawn) in the @18 wall process.

Four first leg wall parts are formed by upsetting, and (e) is the 11th leg wall part from the press working stage in the @1 side wall forming process.

5 walls of 1181 m were formed on the left end of the surrounding wall part, (to)
In the 2nd F1@wall process, the second circumferential wall portion 6 having an outer diameter larger than the outer diameter of the first circumferential wall portion is narrowed by Bouless machining,
(G) is the 182 side wall, and the second peripheral wall portion 6. is formed by press working in the opening end forming process. An open end 8 is formed on the second side wall 7 and the opening 9. In this case, the inner surfaces lO and 11 of the IN1 peripheral wall portion 4 and the second Ffa wall portion 6 are almost smooth surfaces, and the thickness of each peripheral wall portion is ensured to be equal to the thickness t1 of the metal material, so that multiple V grooves can be formed. 8 steps (h circumferential wall part, 6) A boob material 12 is formed.
It forms @, and as shown in TfszG, @1 surrounding wall part vlI18a, 18b,... or a2fta1MW
66cV'l1414 a, l4b, --
・is formed.

Furthermore, in order to reduce the overall weight of the tube with multiple Vg without impairing the robustness of the pulley, suitable weight reduction material is applied to the inner peripheral surfaces 10 and 11 of the peripheral walls 4 and 6 in the VIl forming process. The fourth part is provided at a negative position corresponding to the peak part of the V groove,
@8 As shown in figure, recesses '15a, 15b, --- and 1
6a, 16b, . 'l The inner periphery 111 of the pulley material with multiple V grooves on the wall (recesses 15a on l and 11, ... and l
6 Even if we set a *..., σ? 〇 As mentioned above, first, a bottom wall portion having a thickness Tl corresponding to about 1/2 of the plate thickness t1 is formed using the metal material having a plate thickness i1i through each of the above steps. J! IIi parts 18 and 14 are formed, and the peripheral wall part σ
) While maintaining the plate thickness of TL, there are no defects such as buckling even in metal materials, and in order to further reduce the weight (a multi-stage structure featuring a recessed part on the inner circumferential surface of the peripheral wall) Formula σ] Multi-groove pulley, a multi-stage σ multi-V groove pulley whose use will increase in the future, is robust, lightweight, automatic blood phase and σ1
The most effective method is the multi-stage multi-V grooved pulley used in devices that rotate equipment on the same axis many times.

[Brief explanation of the drawing]

Figure 1 shows a pulley σJ with multiple sets of multiple vS based on the present invention.
In the forming process, (a) is the metal material, elongation, cup forming process, (c) beam strike forming process, ni) is the first side wall process, ←) is the first side wall process, (f) is 11p1281
! Step (g) is a second side wall opening step. FIG. 2 is a simplified cross-sectional view of an embodiment according to the present invention, and FIG.
The figure is a simplified cross-sectional view of another OJ embodiment of the present invention. l...Metal material, 8...Bottom wall portion, 4...First peripheral wall portion, 6...IJ! 2 circumferential wall portion, lO... first inner circumferential surface,
ll...Second inner circumferential surface, 12...-tooling material, 13a
, 18b , ], 4a, 14b...V groove, 15115
b...first inner circumferential surface σ) recess, 16a+ 16b...
A convex portion on the second inner peripheral surface. Patent applicant Reio Nakai, representative of Aisin Seiki Co., Ltd.

Claims (1)

[Scope of Claims] (1) Multi-stage multilayer ■ made by pressing metal materials
A grooved pulley material nail is provided at two or more circumferential parts with different outer diameters, and the 1ril marking wall is connected to the city center wall, and the local wall part σ
A multi-stage pulley with a multi-layered VL, which has a holding groove made of metal material with a thickness of 0 and a circumferential wall. (2) In the multi-stage multi-grooved boob described above, the multi-stage type is characterized by being thinner than the bottom wall σI plate thickness or the metal material σ plate thickness. Pulley with multiple V grooves. (8) Claims indicated at the beginning σ) Inner periphery rIl of a peripheral wall portion provided with a V groove in a multi-stage multi-VM pulley
! A multi-stage multi-V grooved pulley featuring a nail recess and all recesses.