JPS60216942A - Manufacture of multiple v-groove pulley - Google Patents

Abstract

PURPOSE:To manufacture a multiple V-groove pulley free from generating top roll by forming a slot groove, having a V-shaped cross section formed at the discoidal outer-peripheral side face, into a way cross-sectional shape, corresponding to the multiple V-groove shape of a final product, at the bottom face. CONSTITUTION:A slot groove S1 having an approximately V-shaped cross section is formed in the outer peripheral side face of a discoidal blank material Q by a slotting roll 1, and its outer peripheral edge is simultaneously compressed to increase its thickness. Next, said groove S1 is expanded into a V-groove part S2, having an approximately trapezoidal cross section, by a preforming roll 12, and its bottom face is simultaneously formed into a face having an approximately wavy-shape cross section corresponding to the multiple V-groove shape of a final product. Next, this wave-shaped face W is rollingly formed into a multiple V-groove shape by a forming roll 3, to obtain a multiple V-groove pulley having the multiple strand groove part S3 free from generating top roll at the crests (m).

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a multi-strip pulley. The present invention relates to a method for manufacturing a multi-thread V-groove pulley whose main elements include a splitting process and a subsequent rolling process.

[Prior art and its problems]

As a manufacturing method for this type of multi-thread V-groove pulley, the patent application No. 58
The one related to No.-90403 was previously proposed by the present applicant.

According to Japanese Patent Application No. 58-90403, as shown in FIG. ))
, the slotted roller 1 that rotates synchronously with the material Q is pressed against the material Q to compress and increase the thickness of the material Q in the radial direction, while making the outer peripheral end surface approximately V.
A process of forming slotted grooves S by slotting in a character shape ((B) in the same figure), and expanding the slotted grooves S into a substantially trapezoidal cross section using the preforming roller 2 to form a V-groove portion. The process includes a step (cC in the same figure) and a step of further rolling forming the V-groove portion S into a multi-striped V-groove portion using the forming roller 3 ((D) in the same figure).

According to such a conventional manufacturing method, as shown in FIG. 1(0) and FIG. The following problems occur because the groove portion SS is formed by rolling.

That is, when looking at the growth process of one mountain m that is formed into a raised part on the material Q side by pressing the forming roller 3 as shown in Figure 2) to (ml), the raised part R generated at the initial stage of rolling ,,R, will eventually merge at the top of the ridge m due to the self-flow based on the pushing force FI*F1 of the slopes 3a and 3b of the forming roller 3, thereby causing a forming defect at the top of the ridge m. A top roll C is likely to occur, and this top roll C damages the belt and has a negative effect on the belt life.For this reason, it was necessary to turn the peak m to remove this top roll C. .

[Purpose of the invention]

The purpose of this invention is to suppress the manufacturing of Japanese Patent Application No. 58-90403.

[Structure of the invention]

In the present invention, instead of simply forming a V-groove portion having a substantially trapezoidal cross section in the preforming process using a preforming roller (FIG. 1(C)), It is characterized by being preformed into a nine-wave shape.

〔Example〕

Hereinafter, more specific embodiments of the present invention will be described in detail using the drawings. However, the same parts as in the conventional example described above are given the same reference numerals.

#! Figure 3 is a diagram showing the first embodiment of the method of the present invention.
l, (Bl, (same as DJ, only the preforming process in FIG. 3 (C1) is different.

In this example, as shown in Fig. 3 (0), the preforming roller that controls preforming is different from the one in Fig. 1 (01) and corresponds to the shape of the forming roller 3 (@Fig. 3 (D)). The preformed surface 12 has a substantially wave-shaped cross section.

Then, the preforming surface 1 of the preforming roller 12 is placed on the outer peripheral end surface of the material q that has been slotted into a substantially V shape in the previous step (B).
By pressing 2 a and rotating synchronously, the 8 layers of slotted grooves are expanded to have a substantially trapezoidal cross section to form a V-groove portion S.

At the same time, the bottom surface of the V-groove portion 8 is formed into a corrugated cross-sectional shape as shown in FIGS. 4(A) to (C1).

At this time, the relationship between the peaks and valleys of the waveform surface W formed on the material Q side is the multi-striped V groove part's (third
This corresponds to the relationship between the peaks and valleys in Figure (D)).

That is, in the preforming process, the single wave-shaped preforming surface 12 is pressed against the V-shaped slotted groove S as shown in FIG. 4 (C1).

Looking at the growth process of the peak m1 on the side of the material Q, the peak m is mainly caused by the flow of the material toward the deepest part d of the slotted groove S under the pressure of one of the slopes 121).

is formed, and the mutually opposing pushing force F* (FIG. 2(C)) does not act as large as in the conventional case, and no top roll is generated at all.

After the preforming is completed, as shown in FIG. 3 (1)), the forming roller 3 forms the multi-striped V-grooves s3, but at this stage, the peaks of the wavy surface 12a preformed in the previous step are Since m1 is further grown and its shape is modified to form the peaks m of the multi-line V grooves S, there is no occurrence of top rolls as in the conventional method.

Figures 5 and 6 (A) to (0) are diagrams showing a second embodiment of the present invention, and the first embodiment illustrates a three-groove belt-hung pulley. On the other hand, in this embodiment, a four-groove belt-hanging pulley is illustrated.

The present embodiment is also basically the same as the first embodiment, but as shown in Fig. 5+DI and Fig. 6 (Al), the deepest part d of the slotted groove s1 is raised up, Since it is necessary to mold the ridges m and m on both sides of the first
Although the occurrence of the top roll C can be completely prevented as in the embodiment, the mountain portion m in the center.

For VC, a slight top roll occurs compared to the same VC as shown in Figure 2. For this reason, before the preforming step (FIG. 5(C)), a step (FIG. 5(B'l)) of expanding the cracking fermentation 8I performed by the auxiliary roller 4 is added.

By doing so, it is possible to minimize the occurrence of top rolls at the central peak m3.

〔Effect of the invention〕

As described above in detail, according to the present invention, the product is molded into a nine-wave shape corresponding to the final product shape in the preforming step before the final molding step.

The occurrence of top roll, which has been a problem in the past, can be suppressed.

[Brief explanation of drawings]

Figure 1 (AI, (B), (0), (D) is an explanatory diagram showing the method of manufacturing a multi-thread V-groove pulley according to Japanese Patent Application No. 58-90403. Figure 2 (A), (Bl, (
a) , (:o) , (ml is an enlarged explanatory view of the main part of Figure 1 (D), Figure 3 Buddha 1 # (B) # (0) I
(D) is an explanatory diagram showing the first embodiment of the present invention, FIG. 4k
), (B), (○) are enlarged illustrations of the main parts of Figure 3 (OL), Figure 5 (AI, (B), (B* (
a) e(A) is an explanatory diagram showing the second embodiment of the present invention; (A) is an enlarged explanatory diagram of the main part of FIG. Slotted roller, 3... Forming roller, 12.
...Preforming roller, 12a...Preforming surface, q...
Sudo, S. ...Slotted groove, s, ...V groove, S3...Multiple V? Blue section, W...Wave shaped surface. Fig. 1 Fig. 2 (A) (B) (C) (D) (E) Fig. 3 Fig. 4 (A) Fig. 5 I Procedural amendment (1 citation 1977 Il' 7 1124 Japan Patent Office Director-General 1. Indication of the case 1982% IH No. 74525 2. Name of the invention Method for manufacturing multi-groove pulleys 3. Person making the amendment Relationship to the case Applicant 4. Agent Address: Chuo-ku, Tokyo 104 IIk Saikai Building, No. 1-29, Mei'cho, Telephone: 03 (545) 2251 (Representative) Patent Attorney + 6219) Shiga Fujiya 5, fIll positive anti-urine, and 2 other people (Re) Detailed description of the invention in the specification ( 2) Brief description of drawings in the specification (3) Contents of amendment to drawing a (1) (7) "Figure 5 (D)" on page 8, line 5 of the specification
(B) Correct the text "Figure 5 (C)" on page 8, line 12 of the specification to tr Figure 5 Φ]. (T) From line 13 to line 14 of page 8 of the specification, it says ``(Figure 5 (B')) is added.'' ``(Figure 5 (CJ) k In addition, (DJ and (G)) in Figure 5 are the steps corresponding to (C) and (D) in Figure 3, respectively.'' (2) (7) Details f page 9, line 15 to 10
Toward the first line of the page, "Figure 5 (4) # (B), (
B, (CJ. (D) is "t [Figure 5 (4),
(CJ, 11)J. (E) shall be amended to ``. (b) “In Figure 5 (C)” in the second line of the specification No. 10
The text has been corrected to read "in Figure 5 (D)." (3) Amend Figure 5 as shown in the attached sheet. Figure 5 above

Claims (1)

[Claims] (1) By pressing a slotting roller against the outer peripheral end surface of the disk-shaped material and rotating both, a slotted groove having a substantially V-shaped cross section is formed on the outer peripheral end surface of the disk-shaped material, and the outside thereof is a step of compressing and thickening the peripheral edge, and expanding the slotted groove into a substantially trapezoidal cross section using a preforming roller;
It is characterized by comprising the steps of forming the bottom surface into a substantially wavy cross-sectional shape corresponding to the multi-striped V-groove shape of the final molded product, and rolling-forming the wavy-shaped surface into the multi-striped V-grooved shape using a forming roller. A method for manufacturing a multi-thread V-groove pulley.