JPS626724A - Manufacture of v-pulley made of sheet metal provided with v-groove and multi-v-groove - Google Patents

Abstract

PURPOSE:To manufacture a V-pulley easily and with a high accuracy by forming a cup-shaped base material by bringing a sheet metal base material to deep drawing, and forming a V-groove and plural lines of multi-V-grooves in a base material peripheral wall part which have been divided into a V-groove formed part and a multi-V-groove formed part, respectively. CONSTITUTION:In a base material forming process, a sheet metal base material is brought to deep drawing, and a cup-shaped base material 1 consisting of a base plate part 11 and a peripheral wall part 12 is formed. In a stepped part forming process, a stepped part 21 is formed in the peripheral part 12 of the base material 1, and the peripheral wall part 12 is divided into a V-groove formed part 14 and a multi-V-groove formed part 15. In a V-groove forming process, a V-groove 31 is formed to the formed part 14, and thereafter, furthermore, in a multi-V-groove forming process, plural lines of multi-V-grooves 41 provided in parallel to each other are formed to the formed part 15. In this way, a V-pulley having both the V-groove and the multi-groove can be manufactured easily and with a high accuracy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of manufacturing a sheet metal V pulley having a V groove and a poly V groove, and more specifically, a V groove and a poly V groove on the substrate side of the peripheral wall. The present invention relates to a method of manufacturing a sheet metal V pulley in which a plurality of poly V grooves are formed in the peripheral wall portion in parallel with this VtR and lined up at a predetermined pitch.

[Conventional technology]

Recently, as a powerful and highly reliable transmission means using a belt, a plurality of V-shaped protrusions along the tensioning direction have been provided on the inner surface side in parallel with a predetermined pinch. Using a so-called poly V belt,
A configuration in which this poly V belt is stretched between the poly V grooves of a pair of opposing poly V pulleys is often used, and the poly V pulleys used for power transmission by this poly V belt, especially sheet metal materials There is active development of poly V pulleys made by molding. On the other hand, in addition to this poly V-belt transmission, two systems of transmission means are also used in which the same V-pulley can also perform normal V-belt transmission, and in this case, the V-pulley has A composite type sheet metal pulley with a poly V groove and a poly V groove, i.e. a V groove and a poly V groove.
A sheet metal V-pulley with grooves is used.

[Problem that the invention seeks to solve]

When using a sheet metal V pulley that is applied to a transmission configuration that uses both a V belt and a poly V belt, that is, a sheet metal V pulley equipped with a V groove and a poly V groove, the driving force In order to obtain strong, reliable, and smooth transmission, it is necessary to engage the V-shaped protrusions of the poly-V belt in particular between the V-groove and the poly-V groove formed by plastically forming sheet metal materials. However, regarding multiple poly V grooves arranged in parallel, the groove width and groove diameter of the poly V grooves themselves, as well as the pitch interval between the poly V grooves, etc., are set to 5/1.
It is necessary to finish with a high precision of up to 0.00 mm, and since this high precision multi-line poly V groove must be formed in conjunction with a regular V groove, both these V grooves and poly V grooves are Forming stress that occurs inside the material as a result of each plastic forming process.

There is a risk that the residual stress and other factors will affect each other, causing deviations in the molding dimensions of both grooves, making it extremely difficult to mold multiple poly V-grooves that require high precision. As a result, there was a problem that good driving force transmission could not be achieved.

[Means for solving problems]

In view of these conventional problems, this invention aims to construct a sheet metal V pulley having both grooves and poly V grooves by molding the sheet metal material as simply and easily as possible and with high precision. The purpose of this invention is to provide a manufacturing method with excellent mass productivity, and in particular, when forming a poly V groove after forming a groove, the influence between the grooves can be eliminated.

That is, the present invention includes a cup-shaped material forming step in which a sheet metal material is deep drawn to form a cup-shaped material consisting of a substrate portion and a peripheral wall portion, and a step portion is formed on the peripheral wall portion of the cup-shaped material, a step forming step in which the peripheral wall portion is divided into a V-groove molded portion on the substrate side and a poly V* molded portion on the opening edge side, and a groove forming step in which a V-groove is formed in the V-groove molded portion of the peripheral wall portion. , a plurality of poly V grooves are formed in the poly V groove molded portion of the peripheral wall.
This method of manufacturing a sheet metal V pulley having a V groove and a poly V groove is characterized in that it includes at least sequentially a step of forming poly V grooves in which grooves are formed in parallel.

[For production]

Therefore, in the method of the present invention, a cup-shaped material consisting of a base plate part and a peripheral wall part is used, and a sheet metal pulley is formed on the peripheral wall part of which a V groove and a plurality of poly V grooves arranged in parallel are formed. In the manufacturing method, prior to the molding of these V-grooves and poly V-grooves, a stepped portion is formed in the peripheral wall in advance, so that the peripheral wall is aligned with the V-groove molded portion on the substrate side and the poly V-groove on the opening edge side. Using this step as a holding reference point during groove forming, insert a groove into the groove forming part.
Since multiple poly V grooves are formed in parallel in the poly V groove molded part, the same step part constitutes a kind of buffer part, and the mutual plastic forming of the groove and the poly V groove is facilitated. It is possible to effectively absorb and buffer the accompanying molding stress and residual stress.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for manufacturing a sheet metal V pulley having a V groove and a poly V groove according to the present invention will be described in detail below with reference to FIGS. 1 to 6.

Figures 1(a) to d) show a sheet metal V according to this embodiment.
FIG. 3 is a half-cut cross-sectional view showing processing modes at each main stage of the pulley manufacturing method from sheet metal material to product.

That is, first of all, in the case of this embodiment method, in FIG. 1, a cup-shaped material is formed by deep drawing a sheet metal material of a predetermined thickness to form a cup-shaped material 1 consisting of a substrate portion 11 and a peripheral wall portion 12. In the forming step (FIG. 1(a)), a stepped portion 21 is formed on the peripheral wall portion I2 of this cup-shaped material 1, and the peripheral wall portion 12 is formed between the V-groove molded portion 14 on the substrate portion ll side and the opening edge 12a side. A step forming step (FIG. 2(b)) in which the V-groove molded portion 15 of the peripheral wall portion 12 is divided into a V-groove molded portion 15, and a groove forming step (FIG. Figure (C))
And the said surrounding wall part! A poly V-groove forming step (FIG. 2(d)) in which a plurality of poly IJ V-grooves 41 arranged in parallel with each other is formed in the poly V-groove forming portion 15 of No. 2 is sequentially performed. The sheet metal material is processed and formed through each process to create the desired V-groove 31 and poly V-groove 4! Sheet metal V pulley 1 with
00 is manufactured.

Further, FIG. 2 is an explanatory cross-sectional view sequentially showing more specific manufacturing steps of the method for manufacturing the sheet metal V pulley 100, and FIGS. 3 to 6 are enlarged cross-sectional views showing details of each part of the same molding, Details of each process are described below.

(1) Cup-shaped material forming step (Fig. 1 (a)) In this cup-shaped material forming step, as shown in Fig. 2 (al),
A sheet metal material with a predetermined thickness and outer diameter is used as a forming material, and is deep drawn to a predetermined outer diameter and drawing depth using both a movable and a fixed outer drawing die Ill, 112 and a holding die 113. Thus, a cup-shaped material 1 consisting of a substrate portion 11 and a peripheral wall portion 12 is formed. At this time, a flange portion 13 made of surplus material resulting from the drawing process remains on the opening edge 12a of the peripheral wall portion 12.

(2) Step formation step (FIG. 1(b)) In this step formation step, first, as shown in FIG. Second mutually polymerized inner press mold 211.2
12 with the cup-shaped material 1 fitted and held,
The peripheral wall portion 12 on the substrate portion 11 side of the cup-shaped material 1 is pre-rolled by the preliminary push roller 213, and the inclined portion 22 is formed in the same portion, so that the peripheral wall portion 12 is formed on the substrate portion 11.
A cup-shaped material 2a with an inclined portion is obtained which is divided into a V-groove molded portion 14 on the side and a poly V-groove molded portion 15 on the opening edge 12a side.

Then, as shown in FIG. 2 (b2), the third. With the cup-shaped material 2a with inclined stepped portions similarly fitted and held in the fourth mutually overlapping inner press molds 214 and 215,
The sloping portion 22 is finished rolled by the finishing step roller 216, and as shown in the enlarged detail in FIG.
A stepped portion 21 is provided on the groove forming portion 14 side. Stepped end portions 23 are simultaneously molded on the side of the poly V-groove molded portion 15 to form a stepped cup-shaped material 2.

That is, in this step forming step, by forming the step 21 on the peripheral wall 12 of the cup-shaped material 1,
This peripheral wall portion 12 is connected to a V-groove molded portion 14 on the substrate portion 11 side that has a smaller diameter than the step portion 21, and a poly V-groove on the opening edge 12a side that has a larger diameter than this through the stepped end portion 23. It is divided into a molding section 15.

(3) Groove formation process (Fig. 1 (C)) In this V-groove formation process, first, as shown in Fig. 2 (cl), the 5. Sixth mutually polymerized inner presser mold 311.3
12, with the stepped cup-shaped material 2 fitted and held, the substrate portion 11 of the stepped cup-shaped material 2 is concentrically squeezed inward in the opposite direction by an outer drawing die 313,
After preforming the stepped end portion 32 within a predetermined range of the peripheral edge, this is formed on the substrate portion l as shown in FIG. 2 (c2).
The seventh external holding mold 314 and the eighth
The poly V-groove molded part 15 is sheared from a predetermined dimension position using the shearing roller 31B while being held by the inner pressing die 315 of the flange part 13. Furthermore, the surplus material portion is removed and shaped in advance, and in this way, a roughly shaped cup-shaped material 3a with stepped portions is obtained.

Next, the roughly shaped cup-shaped material 3a with the stepped portion is subjected to the ninth step, as shown in FIG. 2(c3). The shoulder portion 317a of the ninth inner V-groove preform 317 is held concentrically between the tenth inner and outer V-groove preform dies 317 and 318, and especially for holding the step portion 21. With the V-groove molded part 14 tightly fitted, the V-groove molded part 14 is pre-rolled by the groove pre-forming roller 319 so as to be narrowed from the outer periphery, and a concave part 33 for V-groove molding is previously formed in the same part. Let it form.

When performing preliminary rolling for V-groove forming on this V-shaped portion 14, the shoulder portion 318a of the V-groove preforming roller 319 and the shoulder portion 317a of the ninth inner V-groove preforming die 317, The stepped portion 21 is always held in pressure contact, thereby preventing the influence of plastic forming in the preliminary rolling from reaching the poly V-groove formed portion 15 side.

Furthermore, as shown in FIG. 2 (C4), the recess 3
Similarly to the above case, the roughly shaped cup-shaped material 3a with stepped portions obtained by preforming No. 3 is preformed with No. 11. The twelfth inner and outer V-groove finishing molds 320 and 321 are concentrically clamped and held, and in particular, the step portion 21 is
1, the concave portion 33 is narrowed deeper from the outer periphery using the V-groove thorn forming roller 322, and finished rolling is performed. A normal ■groove 31 is formed in the concave portion 33 to obtain a coarsely shaped cup-shaped material 3 with grooves.

Again, in the same way as above, this V-shaped portion 14
During finish rolling for forming the V-groove 31, the shoulder portion 322a of the V-groove portion trimming roller 322 and the shoulder portion 320a of the eleventh inner V-groove finishing mold 320 form the step portion 21. Make sure to keep the pressure contact at all times.
The influence of the forming pressure during plastic forming in the same finish rolling and the residual pressure after forming is
In this way, when the V-groove molded portion 14 is formed with the normal V-groove 31, as shown in the enlarged detail in FIG. The groove forming portion 14 is formed between the stepped end portion 32 of the substrate portion 11 and the stepped portion 2.
1, the V-groove 31 is bent into a figure 7 shape, and is double-folded and reinforced on the same level difference end 32 side, making it possible to form the V-groove 31 of a predetermined shape and size with high precision as desired.

(3) Poly V groove forming step (Fig. 1 (d)) In this poly V groove forming step, first, as shown in Fig. 2 (dl),
The roughly shaped cup-shaped material 3 with a V groove is fitted into the poly V groove preforming die 411, and the substrate portion 11 and the V groove 3 are fitted.
1 part is concentrically held by a thirteenth external holding die 412 from the outside so as to include the V groove 31, and the stepped part 21 is similarly held concentrically by an external holding mold 413 from the outside, In particular, the step portion 21 is tightly and strongly compressed between the shoulder portion 411a of the first poly V-groove preform mold 411 and the protruding holding molding portion 413a of the outer pressing mold 413. In this state, the first poly V-groove preforming roller 414 moves a portion of the poly V-groove forming portion 15 close to the stepped end portion 23 side,
Perform the first preliminary rolling so as to narrow it down from the outer periphery.

A reference groove portion 42 for poly V-groove molding is previously formed in the same portion, and in this way, a cup-shaped material 4a with a V-groove is obtained.

When rolling the reference groove part 42 for forming the poly V-groove on the part of the poly V-groove forming part 15 that is close to the stepped end 23 side, the part of the step part 21 is
By the shoulder part 411a of the first poly-groove preforming mold 411 and the protruding holding molding part 413a of the outer press molding mold 413,
Since the pressure is constantly held, there is no risk that the plastic forming during rotary molding will affect the V-shaped part 14, and in this way, the poly V-groove molded part 15
When the reference groove part 42 is formed, as shown in an enlarged detail in FIG.
It is bent into a letter shape, and is formed into a double folded shape on the uneven end 23 side.

Then, as shown in FIGS. 2(d2) and (d3), the first poly-groove preforming mold and the forming roller 411
．． 414, this is placed in an eccentric second poly V-groove preform 415. Then, the combination of the forming roller 41B, the eccentric third poly V-groove preforming mold 417, and the forming roller 418 were sequentially rearranged, and in this case, the stepped portion 21 was held under pressure in the same manner as described above. In this state, the reference groove portion 42 of the poly V-groove molded portion 15 is used as one reference point, and the second.
As the third preliminary rolling.

The plurality of parallel preliminary poly V grooves 43 and 44 are narrowed down little by little so that they gradually approach a predetermined size and shape, and the raised ears 45 are gradually raised on the opening edge 12a side. Shape.

Further, finally, as shown in FIG. 2(d4), an eccentric third poly V-groove preforming mold 417 of the final stage of poly V-groove preforming. and a third poly V-groove preforming roller 4
The 18 combinations are made into an eccentric poly V-groove finishing mold 41.
9. and poly V groove finishing forming roller 420, and with the parentheses also holding the stepped portion 21 under pressure in the same way as above, the plurality of preliminary poly V strips paralleled in the third preliminary rolling The groove 44 is narrowed deeper from the outer periphery by the groove finishing forming roller 420 and finished rolling, and a plurality of parallel poly V grooves 41 are formed in the same poly V groove forming part 15. Then, obtain V pulley 4 with ■groove and poly■groove.

As you can see, in the same way as above, when finishing rolling for forming the poly V groove 41 on this poly V groove molding part 15, the shoulder part 41 of the poly V groove finishing mold 419 is
8a and the protruding holding molding part 413a of the outer pressing mold 413
Because the stepped portion 21 is always held under a strong pressure, the forming pressure during plastic forming in the finish rolling of the poly V groove 41 is reduced, just as in the case of the groove 31. ■Groove 31
In this way, the plurality of parallel poly V grooves 41 are molded in the poly V groove molded part 15, as shown in detail in FIG. 6 in an enlarged manner. , the same IJV configuration part 15 is bent into a 7-shape with a plurality of parallel strips, and on the step part 21 side, a part is double-folded and reinforced by the uneven end part 23, and the opening edge On the side of the section 12a, the rising ears 45 are raised up, and these rising parts can prevent the poly V vents from coming off, and in this way, the poly V vents can be arranged in parallel with each other according to the predetermined shape and dimensions. The plurality of poly V grooves 41 can be formed as expected with high precision.

That is, it is possible to manufacture the sheet metal V pulley 100 (V pulley 4) as a product in which the target ■ groove 31 and poly V groove 41 are each formed with high precision as described above.

〔Effect of the invention〕

As detailed above, according to the method of the present invention, a cup-shaped sheet metal material consisting of a substrate part and a peripheral wall part is used, and a V groove and a plurality of poly V grooves arranged in parallel with each other are formed on the peripheral wall part. In this case, prior to forming these V grooves and poly V grooves, by first forming a stepped portion on the peripheral wall portion,
The peripheral wall is divided into a V-groove molded part on the substrate side and a poly V-groove molded part on the opening edge side, and this stepped part is used as a holding part during groove molding. Since multiple poly V grooves are formed in each of the poly V groove molded parts, the same step part constitutes a kind of buffer part, and the plasticity of these grooves and poly V grooves is It has the advantage of being able to effectively absorb and buffer molding stress, residual stress, etc. that occur during molding, and directly eliminate the effects of these stresses.
In particular, the size and shape of poly V grooves that require multiple strips to be arranged in parallel can be formed with high precision, and as a result, sheet metal V grooves with this type of It has the advantage that the transmission efficiency of the pulley can be significantly improved, and the structure itself is extremely simple and can be easily implemented.

[Brief explanation of the drawing]

Figures 1 (a) to d) show processing modes at each major stage from sheet metal material to product according to an embodiment of the method for manufacturing a sheet metal V pulley with V grooves and poly V grooves according to the present invention. It is a half-cut sectional view shown in FIG.
to d4) are explanatory half-cut cross-sectional views sequentially showing more specific manufacturing steps of the same manufacturing method, and FIGS. 3 to 6 are enlarged sectional views showing details of each part of the same molding. 1...Cup-shaped material, 2...Stepped cup-shaped material, 2a...Cup-shaped material with inclined portion, 3...
Roughly shaped cup-shaped material with V groove, 3a...Roughly shaped cup-shaped material with stepped portion, 4...Pulley with V groove, poly V groove, 4a...Cup-shaped material with V groove. 11... Substrate part, 12... Peripheral wall part, 14...
- V-groove molded part, 15... Poly V-groove molded part. 21...Stepped portion, 23...Uneven edge. 31...■Groove, 32...Uneven end. 41...Poly V groove, 42...Reference groove part. 100...Sheet metal V pulley with V groove and poly V groove as a product. +11...Inner drawing type! 12...Outside school type. 211...First internal pressing mold, 212...Second internal pressing mold, 213...Preliminary stage pushing roller, 214.
. . . Third internal pressing mold, 215… Fourth internal pressing mold, 216… Finishing step pressing roller. 311...Fifth inner presser die, 312...Sixth inner presser die, 313...Outer drawing die, 314...Seventh outer presser die, 315... Eighth internal presser type, 31B
... Shearing roller, 317 ... Ninth inner V-groove preforming mold, 31? a...Shoulder part of the same mold as above, 31 [1
...10th outer V groove preforming mold, 319...V
Groove preforming roller, 319a... Shoulder portion of the same forming roller, 320... Eleventh inner V-groove finishing mold, 3
20a...shoulder part of the same mold, 321...first
2 outer V-groove finishing mold, 322... V-groove finishing forming roller, 322a... shoulder portion of the same forming roller. 411...First poly V groove preforming mold, 41! a...
・・Shoulder part of the same mold as above, 413・・・・External press mold,
413a... Shoulder of the same mold as above, 414... First poly V groove preforming roller, 415... Second poly V
Groove preforming mold, 415a...Shoulder part of the same molding mold, 4
1B...Second poly V groove preforming roller, 417...
...Third poly V-groove preforming mold, 417a...Shoulder of the same mold, 418...Third poly V-groove preforming roller, 419...Poly V-groove finishing mold, 419a・
...Shoulder part of the same mold as above, 420...poly V groove finishing molding roller. Patent applicant Kanemityo Co., Ltd. Patent attorney Takashi Suzue - Figure 1 Figure 2 (al) (bl) (b
2) Figure 2 (c3) (c4) (dl) Figure 2 (d4) Figure 3 Figure 4 Figure 5

Claims (4)

[Claims] (1) A cup-shaped material forming step in which a sheet metal material is deep-drawn to form a cup-shaped material consisting of a substrate portion and a peripheral wall portion, and a stepped portion is formed on the peripheral wall portion of the cup-shaped material, and the peripheral wall portion a step forming step in which a V-groove molded portion on the substrate side and a poly V-groove molded portion on the opening edge side are formed; a V-groove forming step in which a V-groove is formed in the V-groove molded portion of the peripheral wall; A sheet metal product having a V-groove and a poly-V groove, characterized in that it includes at least sequentially a poly-V-groove forming step of forming a plurality of poly-V grooves in parallel in the poly-V-groove forming part of the part. A method of manufacturing a V-pulley. (2) In the V groove forming process, the V groove is
A method for manufacturing a sheet metal V-pulley having a V-groove and a poly V-groove according to claim 1, wherein the step is performed on the groove forming part side. (3) The V-groove and poly-V groove according to claim 1, characterized in that the step of forming the poly-V groove is a step performed on the side of the poly-V-groove molding part while the stepped portion is restrained and held. A method for manufacturing a sheet metal V-pulley with grooves. (4) The poly V-groove forming step is a step of simultaneously forming poly V-grooves consisting of a plurality of strips in parallel, and simultaneously forming rising portions on both ends of the poly V-grooves. A method for manufacturing a sheet metal V pulley having a V groove and a poly V groove according to item 1 or 3.