JPS6076234A - Manufacture of grooved pulley made of plate - Google Patents

Abstract

PURPOSE:To manufacture a grooved pulley made of steel plate having accuracy in roundness by recessing annular grooves in a circular steel-plate stock to press-form an original shape of grooved pulley and pressing grooved wheels against the rim of pulley. CONSTITUTION:In the 1st stage, the prescribed number of preliminary grooves 1'' are concentrically recessed in the section of the stock dimension based on the width of rim at the outer circumference of the diameter D of a finished grooved pulley in the circular steel plate stock A. In the 2nd stage, a rim 6 is perpendiculary formed from the circumference of an axial part 3 by press working. In the 3rd stage, annular grooves having desired cross-sectional shapes are recessed in the traces of preliminary recessed grooves 1'' in the whole circumference of rim 6, by press-rolling a grooved wheel against the rim 6 from its outer circumference and press-rolling a grooved wheel for inner circumference against the rim 6 from its inner circumference.

Description

[Detailed description of the invention] This invention relates to a method for manufacturing a groove wheel made of sheet metal.

The groove wheel formed according to the present invention is used for a belt having a continuous tooth profile in cross section.

This invention is carried out using cold pressing means using a flat steel plate as a material.

The belt used in the groove wheel formed according to the present invention has a continuous tooth profile in cross section as described above. This type of belt also has a relatively short history, replacing the previous version that used multiple V-belts. The form of the belt itself is gradually changing with the development of materials that are resistant to tension and torsion, have good elasticity, coefficient of friction, thermal properties, electrostatic properties, etc., and have little change due to temperature and humidity. In order to follow these changes in belts, the transmission winding means corresponding to the belts have also been required to change.

Most of the conventional power transmission winding means are made of cast metal, but with the improvement of press technology, various types of sheet metal made of steel are being developed, but due to their construction, they have a wide range of rim widths. However, there is little development of press processing, and even less technology for forming annular grooves on the rim width, or circumference, is minimal, and even if some exists, the accuracy is low, and it is not suitable for winding, which requires high precision. It was considered impossible to use it in transmission devices.

The present invention provides a method for manufacturing a sheet metal groove wheel with high precision.

Next, an embodiment of the present invention will be described with reference to the drawings. The material is a perfectly circular steel plate, and its diameter is the diameter (D) of the finished groove wheel.
) plus the rim width (B), but the rim width (131) has the desired number of annular grooves (1).
Therefore, based on the desired annular groove shape, that is, the shape of the unit groove (1), the dimensions required for the groove width and the groove depth are taken into account, and the expanded dimension including these is the rim size. Width must be added to the basic material dimension. Furthermore, if the boss (2) is provided as necessary, some adjustment is required.

The first step is the diameter (
A desired number of preliminary grooves (i) of the annular grooves (1) are provided concentrically with the center (Q) in the section of the rim width basic material dimension that occupies the outer circumferential position from D>.In this case, the unit groove ( 1°), such as a rectangular groove, an inverted trapezoid, a figure 7 shape, a semicircle, etc. Along with forming the preliminary groove (1), a boss is formed as necessary. (2) and the bead (4) or radial part (5) for the purpose of reinforcement at the width part (3).
) is simultaneously performed by press working.

The second step is the step of forming the original shape of the finished groove wheel shed by press processing the material processed in the first step, and the rim (6) is formed from the circumference of the width portion (3) which is basically smooth.
As shown in Figure 3, the depth of the female mold (7) is equal to the desired rim width β), and the diameter is equal to the diameter of the finished groove. A recess (8) is formed that is equal to the maximum diameter of the outer periphery of the car change, and this mold (punch f1 corresponding to the force) has a maximum diameter of the outer periphery that is equivalent to the minimum inner diameter of the finished miso car number. The mold is made of a perfect circular material steel plate (5) with a pre-concave groove σ on the same circumference as the force concave (8), and is placed in the center of each plate (Q). After that, pressing is performed by applying the necessary impact force to the punch (2).

In this second step, a perfectly circular rim (6) with a pre-groove (1") is formed at right angles to the width (3), forming a drum shape. Its edges and the portions approaching the edges The round material steel plate (5) is compressed by the press working in the second process in proportion to the distance from the point where it connects with the width part (3) to the edge, so the preliminary groove (1) provided in the first process is compressed. ″)
This is a completely incomplete annular groove, and this preliminary groove (r) is completed in the third step.

That is, the grooved wheels (9) are placed at at least three equal positions on the entire circumference of the preliminary groove (i) on the outer circumference of the rim (6).
The unfinished groove wheel (ladle) is supported in a non-contact manner so as to be able to rotate in a certain direction, and the rim (
6) A grooved wheel (to) for the inner periphery is arranged on the inner periphery and can press against the groove-shaped portion (the ridge for forming the groove when viewed from the outer periphery) when viewed from the inner periphery. , these are grooved wheels (
9) and its grooved wheel (9) and the corresponding inner circumferential grooved wheel (1@, both wheels (9)
(Applies pressure in the direction in which II approaches each other and also applies rotational force. Also, the grooved wheel (9) without the corresponding inner grooved wheel σ is the center (Q) of the unfinished grooved wheel (F). A rotational force is applied along with a pressing force in the direction.The direction of rotation is that all the grooved wheels (9) are in the opposite direction to the unfinished grooved wheel (F), and the inner grooved wheel α0 is also the same as the grooved wheel. 'The inner grooved wheel (lrJ) imparts a rotational motion in the opposite direction to the wheel (9), that is, in the same direction as the unfinished grooved wheel (F') (in the illustration, the unfinished grooved wheel CF). (The direction is the same as the direction of rotation of the clock hands.) In this way, the preliminary groove (
i) Pressing and rolling of the grooved wheel (9) from the outer circumferential direction within the groove traces, and inward from the inner circumferential direction at the peak of the reservoir forming the preliminary groove (1) from the inner circumference of the rim (6). Circumferential grooved wheel σ0)
The annular concave groove (1) has a desired number of grooves and a desired cross-sectional shape by supporting the pressing force of the separation wheel (9) from the outer periphery, and also by rolling the extrusion pressure corresponding to the outer circumferential direction. can be recessed all around the rim (6).

As described above, this invention basically provides a desired number of stripes around the entire circumference of the rim (6) which is curved at right angles from the upper end of the width portion (3).
In addition, a mill wheel provided with an annular groove (1) having a desired cross-sectional shape can be formed by pressing a steel plate as a raw material in only three steps.

If we were to manufacture such a miso wheel using conventional press processing using a steel plate as the material, we would gradually create an annular concave groove from a shallow plate shape by pouring it into the flat plate material at the position where the rim should be. A press machining specialist believes that the rim is formed into a deep dish shape through multiple press processes, and is ultimately bent at right angles from the upper end of the width part to form a rim with an annular concave groove. At the same time, the hardening phenomenon of the material naturally occurs due to repeated press working.

This was due to a technical impossibility based on common knowledge in the art, and as a result, it was considered impossible to produce the product by press working itself.

However, in this invention, as a means for forming the annular groove (1), which is the most important requirement for a miso wheel, preliminary grooves (1) with a desired number of grooves and a desired cross-sectional shape are formed in a planar material. It is formed into a "record disc" shape by concentric press working, and the second step is to configure the entire shape that is not directly related to the annular groove (1), and the third step is to configure almost the entire shape. To finish the annular groove (1) on the material, press working is not performed in this work, and the preliminary groove (1) formed in the first step is pressed and rolled with a grooved wheel from the front and back of the material. In this way, an annular groove (1) of a desired shape is formed.

Therefore, the annular groove (1) is formed by only one press operation and the "drawing" process in the third step.
The process of forming the rim (6) that forms the annular groove (1) is also done through press working only once, so the hardening of the material caused by the machining of the finished miso wheel itself is significant enough to affect the strength of the product. Do not cause any disadvantageous effects.

Furthermore, although only the negative side of the rim (6) having the annular groove (1) is in contact with the width portion (3), the structure of the annular groove (1) itself is a kind of reinforcing structure. In terms of overall strength, it is not inferior to Iki et al.

At the beginning, I mentioned the type of belt to use, but
Conventional V-belt cars used for multiple uses can also be manufactured using exactly the same method.

As described above, the present invention reduces the number of press processing steps for bending and compression of the steel plate material, thereby reducing the hardening phenomenon of the material to the extent that it does not affect the use of the product, and making it possible to form a highly accurate annular shape. The concave groove can be formed in the rim bent at a right angle so as to be continuous with the width part, and the rim is characterized in that it is effective in manufacturing a high-precision milling wheel from a steel plate.

[Brief explanation of the drawing]

Figure 1 is a plan view of a perfect circular steel plate with preliminary grooves formed on the outer circumference of the width part by press working, and Figure 2 is a plan view of a perfect circular steel plate with preliminary grooves etc.
FIG. 3 is a sectional view taken along the line I--I in the figure, FIG. 3 is a sectional view showing press working in the second step, and FIG. 4 is an enlarged sectional view of the finished product. (11... Annular groove, (1)... Preliminary groove, (2)...
Boss, (3)...width part, (6) tatami/rim, (9)...grooved wheel, QO)...inner grooved wheel, (5)...perfect circular steel plate, (phrase)・Center. Patent applicant Riken Kaki Kogyo Co., Ltd. Procedural amendment (method) Kazuo Wakasugi, Commissioner of the Japan Patent Office 3 Person making the amendment 4 Agent 6 Number of inventions increased by amendment

Claims (1)

[Claims] A preliminary concave groove with a desired number of grooves and a desired cross-sectional shape is formed outward from the center position of the flat plate-shaped steel plate material in a perfect circular shape from the center position to the outer periphery of the width of the desired radius, and bosses etc. are formed as necessary. The rim is formed concentrically by pressing in the first step, and in the second step, the boundary between the desired rim width provided with the preliminary groove and the width portion of the desired diameter is bent at right angles to form the rim. The grooved wheel is brought into contact with the preliminary groove formed in the rim in the third step from the outer circumferential direction and the inner grooved wheel from the inner circumferential direction, and the rim is pressed and rolled to adhere. A method for manufacturing a groove wheel made of sheet metal, in which an annular concave groove is provided.