JPS60102240A - Manufacture of poly v-pulley made of thin plate - Google Patents

Abstract

PURPOSE:To obtain a light weight poly V-pulley that can withstand high speed rotation and high torque by forming a cuplike can having a thin peripheral wall from a thin material and after forming the peripheral wall part to currugated form, rolling a poly V-groove. CONSTITUTION:The outer periphery 1a of a circular thin plate material 1 is thinned by press work. A cuplike can 3 consisting of a thinned peripheral wall part 4 and a bottom wall part 5 having thickness of the material is formed by further press work. Then, a corrugated form 6 having crests and troughs is formed in the peripheral wall part 4, and a semi-manufactured products in which the peripheral wall part 4 is formed to a corniced shape 7 by compression. Then, it is held by a corrugation rolling roll 9a and a rotation supporting roll 9b, and a poly V groove 11 is formed by a rolling roll 10, and a poly V-pulley 12 is obtained.

Description

[Detailed Description of the Invention] [Subject of the Invention] The present invention relates to a method for manufacturing a sheet metal polyurethane pulley. The present invention relates to a method for manufacturing a poly-V pulley.

[Prior art]

Regarding a method of manufacturing a poly V pulley from a sheet metal material, Japanese Patent Application Laid-open No. 11051/1983 describes a process in which the peripheral wall of a cup-shaped material is pressed with a corrugating roll. After forming the peripheral wall into a corrugated cross-sectional shape having alternating peaks and troughs, the peripheral wall of the cup-shaped material is compressed in the axial direction, and then poly V is formed using a rolling roll. There is an explanation about the method of manufacturing a sheet metal polyurethane pulley that forms grooves. To explain this using Figure 1, 1
″ is the thickness of the sheet metal, 2″ is the cup-shaped material, 3′ is the peripheral wall,
4" is the bottom wall, 5" is the cross section of the corrugated peripheral wall, and 6' is the cross section of the wavy peripheral wall.
1 and 2 respectively indicate compression processing in the axial direction, and 7° indicates a poly V groove formed by a rolling roll.

[Problems with conventional technology and its technical analysis] This conventional technology
The poly V-boot is made of a thin plate of about 1.8 to 2.4 mm, and when the pulley rotates at high 1-lux and high speed, it has a 4°'a mounting hole for the drive device. However, there is a drawback that the area near the mounting hole in the bottom wall 4' is damaged due to the thin plate.As a preventive measure, a reinforcing plate 8° was installed on the bottom wall (1
to prevent damage. Another method is to increase the thickness of the silver/gold material forming the cup-shaped material from the beginning in order to prevent damage to the bottom wall part, for example, use a thickness of about 3.21 mm. However, in this case, thick plate 10
° A cup-shaped material is formed into a bottom wall portion 11' and a peripheral wall portion 12゛.The peripheral wall portion is made into a wave shape of 13゛.This is compressed in the axial direction into 4 pieces of 14" and compressed into a wave shape. There is also a method of forming a di groove of 15° with a rolling roll.In this case, when bending into a bellows shape on the inside of the peripheral wall of the pulley, since the sheet metal material +4 is thick, a di groove of 13° a.
As shown in the figure, if a poly V groove is formed using a rotating roll on a poly V groove that cannot be bent sufficiently, the wall thickness of the inner peripheral surface of the poly V groove will become thicker by 16°, and in order to make this thinner, There are drawbacks such as having to fundamentally change the current processing method or completely change to a more powerful device that can easily bend and process even thick sheet metal.Furthermore, the thickness of the sheet metal will increase. This increases the strength of the bottom wall, but it also increases the thickness of the poly Vm and inner peripheral surface, which increases the weight of the poly V boo and generates a large inertial force during rotation, which goes against the weight reduction goal. .

[Technical issues]

Therefore, the present invention provides a poly V pulley manufacturing method in which a cup-shaped can consisting of a bottom wall part and a peripheral wall part is manufactured from a silver-gold material, and a poly V groove is formed in the peripheral wall part. The technical objective is to develop a method for manufacturing poly V-boots that are durable and lightweight.

[Technical solution]

The technical measures taken to solve the above technical problems are:
The outer periphery of a thick circular sheet metal material is pressed to make it thinner, and a cup-shaped can consisting of a bottom wall part having the thickness of a silver-gold material and a thinned peripheral wall part is manufactured, and the cup-shaped can is After forming the peripheral wall portion in a corrugated shape, poly V grooves are formed in the peripheral wall portion using rolling rolls.

[Effect of technical means]

The above technical means works as follows. In other words, a poly-V pulley is manufactured by forming a wave-shaped bent part on a thick bottom wall and a thin peripheral wall, and forming a poly-V groove after compression. Since the bottom wall is thick, there is no damage from the vicinity of the mounting hole in the bottom wall even if a l·ruq is applied.

(2) Taking the bottom wall (one side is perpendicular to the axis,
Even if there is some narrow assembly or unevenness, it can be corrected because it is within the thickness, and it can be installed straight to the drive device, and no noise will be generated due to pulley deflection.

(3) The peripheral wall with the poly V-groove is thin and lightweight.
Since the bottom wall, which requires strength, is thick, this poly-V pulley is lightweight and suitable for heavy loads.

[Special effects produced by the present invention]

The present invention produces the following unique effects. That is, flll
As a poly V pulley with a high load, a reinforcing material was manufactured separately at the bottom wall opening 1;, but this is completely unnecessary, resulting in large and medium cost reductions.

(2) 1.8 to 2.4 required for the formation of conventional poly ■ grooves
With m11, it is possible to easily manufacture poly V pulleys for high loads by using the molds and equipment for bending into corrugations and forming poly V grooves as they are.

〔Example〕

An example illustrating a specific example of the above technical means will be described below.

(2) is a circular sheet metal material made of a cold-rolled steel plate with 3.2 fins, and its outer peripheral portion 1a is thinned to approximately 2.4 mm by press working, as shown in 1b.

A cup-shaped can consisting of a peripheral wall portion 4 and a bottom wall portion 5 as shown in 3 is formed by pressing this circular sheet metal lugs with a thinned outer peripheral surface.

Next, the peripheral wall portion is formed into a waveform 6 having peaks and valleys, and is further compressed in the axial direction as shown in 7 to give the peripheral wall portion a bellows shape to form a poly V semi-finished product 8. The poly V groove 11 is formed by the rolling roll 10, and the poly V pulley 1 is held by the corrugated rolling roll 9a and the rotation support roll 9b.
2 is manufactured.

13 is a peripheral wall portion formed with a poly V groove; ], 4 a, and 14. b is a hole for a drive device (not shown).

[Brief explanation of drawings]

Figure 1 shows the conventional manufacturing method, so (a) is a cross-sectional view of the pulley-like can, (b) is a cross-sectional view of the bending process, and (c) is a cross-sectional view of the compression of the peripheral wall. It is a figure (
D) is a cross-sectional view of the poly-V pulley. FIG. 2 shows the bending process of the peripheral wall portion, and (A) is a cross-sectional view of the pulley-like can and an enlarged cross-sectional view after grooves are formed. FIG. 3 shows the process of the embodiment of the present invention, (a) is a cross-sectional view of the sheet metal lugs, and (b) is an 11-section view of the sheet metal lugs with the outer periphery expanded.
(c) is a 1vi side view of the cup-shaped can, (d) is a cross-sectional view of the bent shape of the peripheral wall, and (e) is a cross-sectional view of the process of forming the poly V pulley groove. and (
) is a 1y1 plan view of the poly V pulley. 1...Circular sheet metal ring 13...Cup-shaped ring, 10.
...Rolling roll, 11...Bo'J V groove. 12...Poly V pulley patent applicant 1 Reio Nakai, representative of Iren Seiko Co., Ltd. 1 Figure 2 Figure 30

Claims (1)

[Claims] In a method for manufacturing a poly-V pulley, in which a sheet metal material is processed to form a cup-shaped can consisting of a peripheral wall portion and a bottom wall portion, and a poly-V groove is formed in the peripheral wall portion, +11 The outer periphery of the circular sheet metal plate is made thinner by press working, and the metal material is expanded outward, and (2) the circular material, which is thicker in the center and thinner in the peripheral part, is made thicker by press working. (3) A waveform consisting of peaks and troughs is formed alternately on the circumferential wall, and the bending is done as a part. , (4) Compress the wavy bent portion in the axial direction to obtain (
5) A method for manufacturing a poly V pulley, comprising forming a poly V groove in the compressed peripheral wall portion using a rolling roll.