JPS6333138A - Manufacture of endless belt - Google Patents

Abstract

PURPOSE:To shorten the working time and to guarantee the quality by an integrated continuous process from a stock, by constituting the titled endless belt by forming a metallic bar material to a cylindrical shape, rolling it to a prescribed diameter by a pressure roller, and also, rolling it by a rolling mill until the prescribed diameter is obtained. CONSTITUTION:From a metallic bar material, a stock 1 having a center hole is formed by die working, pressed strongly by a pressure roller 3 by inserting a roller 2 into its center and rotating it, and a stock 1a whose diameter, plate thickness and plate width are about 0.5m, about 1mm, and about 10mm, respectively, is formed. Subsequently, the stock 1a is supported by rollers 6, 7 pressed by a driving roller 4 and a grooved driving roller 5, drawn and pressed by a tension roller 7 by turning a receiving roller 6, and the stock 1a is held in the same plate thickness by a pressure driving roller 8, by which an endless belt 1b is formed. According to such a method, a welding is not required, plate thickness and plate width are uniform and the quality is stable, the working time is shortened, and the mass-production can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an endless belt used for power transmission in automobile engines and the like.

[Prior Art] A common conventional technique for manufacturing endless belts is to adhesively weld the end portions of metal belt bands and roll the welded portions to form one endless belt.
For example, in Japanese Utility Model Application Publication No. 131-784, a thin metal plate rolled to a predetermined thickness is cut into strips with predetermined width and length dimensions, and the cut ends in the longitudinal direction are overlapped and welded using an electron beam or the like. At this time, the thickness of the thin metal plate is set to be slightly thicker than the final finished thickness, and the endless metal plate is then rolled to a predetermined thickness. Ta.

Furthermore, in JP-A No. 81-127943, a long thin metal plate of a predetermined width is first fixed to a lock part of a cylindrical winding body that rotates in a predetermined direction, and the thin metal plate is tilted at a certain angle. Then, it is tightly wound so that the side edges are in contact with each other, that is, in a spiral shape, and at the same time, the spiral winding tangent is welded with an electron beam or the like to form a continuous cylindrical body, and then,
After the cylindrical body was rolled, it was cut into belt widths in a direction perpendicular to the axis.

[Problems to be Solved by the Invention] However, in the conventional metal belts, all of the techniques involve welding a thin metal plate that has been completed in advance.

For this reason, firstly, it is necessary to manufacture thin metal sheets to a specified thickness.This means that controlling the sheet thickness is important, as well as maintaining the specified sheet width or length. This required management, which was a problem during mass production.

Secondly, welding is required, which increases the number of processes and increases costs.Furthermore, welding can lead to breakage accidents during use, which poses problems in terms of quality assurance regarding durability. It was a dot.

Thirdly, since a welding process is required, a rolling process must be added to maintain the surface smoothness after welding.

These problems lead to loss of material, and since each step is added, productivity is also affected.

[Means for Solving the Problems] In order to solve the problems with conventional metal belt manufacturing, the method for manufacturing an endless belt according to the present invention is to produce a metal bar with a center hole drilled in the first material. a first step of manufacturing a second material; a second step of manufacturing a second material by rolling the first material to a predetermined diameter with a pressure roller;
The method is characterized by a third step of manufacturing an endless belt by rolling the raw material with a rolling mill until a predetermined diameter is obtained.

[Function] The endless belt manufacturing method according to the present invention is a process that allows for integrated manufacturing from the metal rod to the final step of the steel belt having a predetermined diameter, so that the processing time can be significantly shortened and at the same time one quality guarantee can be achieved. Can be retained.

In other words, if a long metal rod is used and processing proceeds in the order of the first material, second material, and third material, that is, the steel belt, material loss can be eliminated.
As a result, processing time was also significantly reduced.

Furthermore, since the welding process can be omitted, it is advantageous from a cost standpoint, and breakage accidents can also be avoided.

[Example] Hereinafter, the method of the present invention will be described in detail based on an illustrative example.

Here, FIG. 1 shows the first step, FIG. 2 shows the second step, and FIG. 3 shows the third step.

In FIG. 1, the metal bar a shown in cross section as shown in FIG. By pressing a die equipped with
) A drilled hole d is formed as shown in FIG.

When the die is compressed, the cutting machine e acts to form a first material l of an annular body having a predetermined width dimension as shown in the perspective view of the first figure (I).

This series of processes are operated sequentially and continuously,
The toroidal first material 1 can be mass-produced in a short time.

Next, the first toric material 1 is automatically moved by a conveyor and transferred to the next process.

That is, the first material l of the toric body is rotated by the holding roller 2 by inserting the holding roller 2 into its own central hole, and at the same time is strongly pressed from the outer periphery by the pressing roller 3 which also rotates by itself. be done.

Through this process, the first material 1 expands its circumference while maintaining its width, and is rotated under strong pressure until it reaches the required diameter.

In this way, the first material 1 becomes the second material 1a and becomes a ring body with an enlarged diameter.

The second material 1a of the ring body has a diameter of approximately 500 cm.
It is desirable that the plate thickness be about 1 layer and the plate width about 10 mm.

FIG. 3 is a diagram showing the third step. The second raw material 1a, which is the ring body described above, undergoes a final process in a rolling mill, which is the next process.

That is, in the rolling mill, a drive roller 4 and a grooved drive roller 5 having circumferential grooves on its circumferential surface at intervals are supported by bearings in a housing, and both rollers 4 are disposed at the interval. , 5 is supported by bearings along with a tension roller 7 which also has the same diameter.

Further, the support supports a rotatable pressing drive roller 8 relative to the roller 6, and the presence of these rollers constitutes a rolling mill.

Thus, the second material 1a is hung onto the roller 6 and the tension roller 7 through the groove provided in the grooved drive roller 5.

Here, the drive roller 4 and the grooved drive roller 5 forcibly press the second material 1a while rotating the roller 6, and at the same time, the tension roller 7 is directed upward to the second material 1a. It rotates and moves while pulling the material 1a.

The pressing drive roller 8 holds the second material 1a so that the second material 1a is always kept at the same thickness.

In this way, the second material 1a is stretched by the pressure applied by the roller 6 and the tension roller 7, and an endless bell lb having a predetermined diameter is completed without the need for welding.

Since the finished endless bell) lb is always processed by rolling, the metal structure forms a stable composition throughout the belt, which ensures good durability even after long-term use. Become.

Furthermore, since the entire process is mainly rolling and does not require welding, stable quality is guaranteed for the entire belt.

It should be noted that various modifications can be made to the above-mentioned embodiment.1 For example, in the process of producing the first material, it is also possible to cut the metal wire in advance and then drill holes later. In addition, in processing the second material, pressing with a urethane resin material, press diameter expansion, etc. are also possible, and it goes without saying that applications may be used within the scope of the gist of the present invention. do not have.

[Effects of the Invention] As described above, in the endless belt manufacturing method according to the present invention, material processing is performed continuously from the first step to the third step, so the material yield is high. Therefore, cost reduction can be achieved.

In addition, since no welding is required during processing,
The entire belt has a stable metal structure, ensuring improved durability.

Furthermore, since the entire belt is pressurized using rollers, the plate thickness, plate width, etc. are uniform throughout the belt.
Mass production effects can be expected.

Moreover, since the metal wire can be processed consistently and continuously, the processing time can be shortened, and from this point of view, it is highly effective in contributing to the mass production effect.

[Brief explanation of the drawing]

Figures 1 to 3 show the first to third steps of the method of the present invention.
In the figures, Figure 1 (A) is a cross-sectional view of the metal wire;
B) is a diagram of forming a hole in a metal wire with a goo mold, the same figure (C) is a diagram of cutting it to a predetermined width after the hole has been made, and the same figure (
D) is a diagram showing the completed first material, FIG. 2 is an explanatory diagram of processing the second material, and FIG. 3 is a diagram showing the rollers of a rolling machine.
It is an explanatory view of processing a second material into an endless belt. 1...Fist first material 1a...Second material 1b...Endless belt 2...Holding roller 3...Press roller 4...Drive roller 5...Grooved drive Roller 6...Receiver is roller 7...φ Tension roller 8...Press drive roller a...Q Metal wire agent Patent attorney Yoshio Saifuji Figure 2 83 Figure 1

Claims (1)

[Claims] a first step of manufacturing a first material with a center hole bored in a metal bar; a second step of manufacturing a second material by rolling the first material to a predetermined diameter with a pressure roller; and a third step of manufacturing the endless belt by rolling the second material using a rolling mill until a predetermined diameter is obtained.