JPH02122B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is widely used for power transmission of automobile engines, electric motors, etc., driving force transmission of precision instruments, facsimile machines, XY plotters, measuring instruments, etc., and other applications. The present invention relates to a method of rolling a metal endless belt.

[Conventional technology]

As a conventional method for rolling metal endless belts, for example, there is a method described in Japanese Utility Model Publication No. 58-56001. A first roll placed inside a belt ring made of an endless metal material and a second roll placed outside the belt ring form a pair of work rolls, and both rolls work together. The belt ring is rolled by the belt ring.
In addition to the first roll, a tension roll is arranged inside the belt ring, and this tension roll applies tension to the belt ring during rolling. The first and second rolls are
Each is provided with rotational driving force and backed up by two drive rolls.

[Problem that the invention seeks to solve]

However, according to the above-mentioned prior art, when tension is applied to a belt ring made of an endless metal material by a first roll and a tension roll disposed inside, the tension roll is moved in a direction away from the first roll. At this time, the first roll and the second roll are brought into pressure contact by moving the drive roll up and down, and the first roll is brought into contact with the drive roll arranged on the outer periphery of the first roll and the second roll. It is necessary to hold it down with the second roll. Then, after the belt ring interposed between the first and second rolls is pressurized by these rolls, tension is applied to the belt ring. For this reason, the positioning accuracy of the belt ring with respect to the first roll may be unsatisfactory.

Since the belt ring is pinched between the first and second rolls, it is impossible to correct the position of the belt ring with respect to the first roll.

Because of the above, in order to correct the position of the belt ring, etc., it is necessary to temporarily separate the first and second rolls to release the pinching pressure, and then press the two rolls again. Since it is not easy, the rolling operation time becomes longer than necessary.

There is a problem.

Further, according to the above-mentioned conventional technology, even when the belt ring reaches the target length by rolling and the rotation of the first and second rolls is stopped, the first and second rolls are kept in pressure contact with each other. Due to this, the circumference of the belt ring is elongated. Then, after the tension roll is returned to the first roll direction to release the tension, the pressure contact between the two rolls is released, so that indentations remain on the formed endless metal belt.

There is also a problem.

This invention solves the problems of the prior art by fixing the position of the first roll and rolling the belt ring by the first and second rolls. This was done by focusing on the fact that the cause was due to the pressure welding used in the process.

Therefore, an object of the present invention is to press the first and second rolls through the belt ring only when rolling the belt ring of an endless metal material.

[Means for solving problems]

In order to achieve the above object, the present invention includes an elastic body protruding in an annular shape on the outer surface of a first roll disposed within a belt ring made of endless metal material or a second roll disposed outside the belt ring. , the amount of protrusion is greater than the thickness of the belt ring, and the first and second rolls have a pressing force between them before rolling and after the end of rolling, but no pressing force is applied to the belt ring. do.

[Effect]

Since an elastic body with a thickness greater than the thickness of the belt ring made of endless metal material is interposed between the first and second rolls, there is a gap between the two rolls before and after rolling by the first and second rolls. Although there is a pressing force, no pressing force is applied to the belt ring.

For this reason, the belt ring has a first
Even when tension is applied by a roll and a tension roll, by moving the drive roll, the first roll and the second roll are brought into pressure contact through the elastic body, and the first roll is attached to the outer periphery of the first roll. It can be held down by a drive roll and a second roll that are arranged. Therefore, while the belt ring interposed between the first and second rolls is not pressurized by these rolls, tension can be applied to the belt ring by the tension roll.

Further, when the belt ring reaches the target length by rolling and the rotation of the first and second rolls is stopped, the interval between the first and second rolls is widened and the two are pressed into contact with each other through an elastic body. This prevents the belt ring from being pressurized.

The belt ring is rolled by pressing the first and second rolls into contact with each other through the belt ring while compressing and deforming the elastic body.

〔Example〕

Examples will be described below. 1 to 3 show a first embodiment of the invention.

W in the figure is a belt ring made of endless belt material, 1
is a first roll, 2 is a second roll 2, and the first roll 1 is located inside the belt ring W, and the second roll 2 is located inside the belt ring W.
Rolling is carried out at a rolling position E with a belt ring W sandwiched between the rollers 1 and 2, and therefore the first and second rolls 1 and 2 form work rolls.

Reference numerals 3 and 4 denote drive rolls, which are installed on a single roll housing (not shown), and this roll housing can be moved up and down by a rolling device. is designed to move up and down. The second roll 2 is arranged directly below the intermediate portion of the drive rolls 3 and 4 so as to be in contact with the circumferential surfaces of both drive rolls 3 and 4, and the drive rolls 3 and 4 drive the second roll 2. The drive rolls 3 and 4 serve as a back-up for the second roll 2.

An annular elastic body 8 is fitted onto the second roll 2 . The elastic body 8 is made of a rubber-like elastic body such as urethane rubber, but may also be made of a spring-like metal. In addition to simply fitting the elastic body 8 onto the outer periphery of the second roll 2, the means for attaching the elastic body 8 can be
A circumferential groove having a predetermined depth may be formed in the circumferential groove, and the elastic body 3 may be fitted into the circumferential groove so that the outer circumference protrudes from the circumferential surface of the second roll 2 at a predetermined height.

This elastic body 8 is installed at a position in the axial direction of the second roll 2 where its outer peripheral surface is in contact with the first roll 1 and not in contact with the drive rolls 3 and 4. The protruding height from the outer peripheral surface of the second roll 2 is determined by the second roll 2 pressing the first roll 1 while deforming the elastic body 3.
The height is such that the outer periphery of the second roll 2 does not come into contact with the belt ring W on the outer periphery of the first roll 1 even when the position of the second roll 2 is fixed.

When the annular elastic body 8 is fitted onto the circumferential surface of the second roll 2, the outer diameter of the elastic body 8 is given the following related dimension.

Elastic body 8 outer diameter - second roll 2 diameter/2 > belt ring W thickness In other words, the elastic body 8 is larger than the thickness of the belt ring W and creates a gap between the first and second rolls 1 and 2 rings.
The thickness shall be .

5 is a tension roll, the first roll 1
At the same time, it is located inside the belt ring W and is movable in the direction of arrow A by a tensioning device (not shown) using, for example, a fluid pressure cylinder.

Reference numerals 6 and 7 denote drive rolls, which are installed in a roll housing (not shown) that is separate from the one in which the drive rolls 3 and 4 are installed. The driving rolls 6 and 7 also provide backup for the first roll 1. A circumferential groove 6a is formed on the circumferential surface of the drive roll 6 to avoid contact between the belt ring W and the drive roll 6, and the circumferential groove 6a maintains the center distance between the first roll 1 and the tension roll 5. The inner circumferential length of the belt ring W can be easily measured by making it possible to measure on a straight line. The circumferential groove 6a allows the first roll 1 and the drive roll 6 to contact each other at the illustrated contact points G at both ends in the axial direction, and a circumferential groove 7a is also formed on the circumferential surface of the drive roll 7. The first roll 1 and the driving roll 7 are as follows.
They are arranged to contact each other at the illustrated contact point F at both ends in the axial direction.

A load cell (also not shown) is arranged in a roll housing (not shown) on which the drive rolls 6, 7 are installed, and this load cell senses the rolling force of the rolling down device (not shown) and feeds back the signal to the rolling down device, This is controlled. Note that a known transmission mechanism is used for the drive rolls 3, 4, 6, and 7 and their drive sources.

In this embodiment, the second roll 2 receives the rolling force and driving force of the driving rolls 3 and 4, and the second roll 2 is supported by the driving rolls 6 and 7 at contact points G and F and receives the driving force. The belt ring W is rolled at the rolling position E by the received first roll 1 (FIG. 3). As the rolling progresses, the tension roll 5 moves in the direction of arrow A and absorbs the rolling amount of the belt ring W.

Before starting rolling of the belt ring W,
The elastic body 8 of the second roll 2 is deformed between it and the first roll 1, but the second roll 2 is moved by the drive rolls 3 and 4 to such an extent that the second roll 2 does not come into contact with the belt ring W.
The roll 2 is rolled down (Fig. 2). As a result, the first roll 1 is rolled down by the second roll 2 via the elastic body 8, and the first roll 1 is supported by the drive rolls 6 and 7 on the lower side, and the first roll 1
Since the position of W is fixed, move the tension roll 5 in the direction of arrow A in this state and tighten
Tension can be applied to. Since the belt ring W and the second roll 2 are not in contact with each other, the position of the belt ring W on the first roll 1 can be adjusted freely.

Further, even after the belt ring W has been rolled to a predetermined circumferential length, as shown in FIG. The space between the first and second rolls 1 and 2 is widened.
Here, the belt ring W is not subjected to the rolling force of the second roll 2, and the position of the first roll 1 is fixed as described above. Therefore, no impression is formed on the belt ring W by the second roll 2, and therefore, the circumferential length of the belt ring W does not elongate even while the tension roll 5 is being returned.

In the state shown in FIG. 2, there is a gap between the second roll 2 and the belt ring W, and the first
Since the center distance between the roll 1 and the tension roll 5 can be measured stably and accurately, the inner circumferential length of the endless metal belt formed by rolling can be measured with high precision (in microns). It became possible.

FIG. 4 shows a second embodiment of the invention. That is, this embodiment is an example in which the elastic body 8 is attached to the first roll 1 instead of the second roll 2. In order to avoid the elastic body 8 of the first roll 1, the elastic body 8 is attached to the first roll 1. The width of the circumferential groove 7a is increased by increasing the length of the drive roll 7 (the same applies to the drive roll 6) that is in contact with the drive roll 1. In this way, the elastic body 8 may be provided on either the first roll 1 or the second roll 2, but it is not excluded that the elastic body 8 is provided on both.

〔Effect of the invention〕

As explained above, according to the present invention, although the elastic body applies a pressing force between the first and second rolls before and after rolling, the pressing force is applied to the belt ring. do not. For this reason, even when tension is applied to or released from the belt ring, it is necessary to adjust the tension of the belt ring with a tension roll, correct the position of the belt ring, and furthermore, while the belt ring is not pressurized. It has also become possible to precisely measure endless metal belts after rolling, making various operations before and after rolling easier.

Further, when the belt ring reaches the target length by rolling and the rotation of the first and second rolls is stopped, the interval between the first and second rolls is widened and the two are pressed into contact with each other through an elastic body. Since the belt ring is not pressurized by keeping the belt ring in this state, no indentation scratches are formed on the rolled metal endless belt, and in conjunction with the above-mentioned precision measurement,
This also has the effect of improving product yield.

[Brief explanation of drawings]

FIG. 1 is a front view showing a first embodiment of the invention;
Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a sectional view of the belt ring in the rolled state at the same position as Figure 2, and Figure 4
The figure is a sectional view of the second embodiment at the same position as in Figure 2. W... Belt ring, E... Rolling position, F... Contact, G... Contact, 1... First roll, 2... Second roll, 3... Drive roll, 4... Drive roll, 5... Tension roll, 6... Drive roll, 6a... Circumferential groove, 7... Drive roll, 7a...
Circumferential groove, 8...Elastic body.

Claims (1)

[Claims] 1 A first roll placed inside a belt ring made of endless metal material, and a second roll placed outside the belt ring.
In the method for rolling a metal endless belt, the belt ring is rolled while applying tension to the belt ring with a tension roll disposed within the belt ring, wherein the outer surface of the first or second roll is rolled. The elastic body is made to protrude in an annular shape, and the amount of protrusion is larger than the thickness of the belt ring, so that although there is a pressing force between the first and second rolls before and after rolling starts, there is no pressing force on the belt ring. A method of rolling a metal endless belt characterized by applying no pressure.