JPS6015013A - Method for twisting strip - Google Patents

Abstract

PURPOSE:To maintain the quality and to shorten a manufacturing process by forming the curved surface of a strip at the twisting part ranging from an inlet to an outlet into two cylindrical surface and performing a natural twisting operation by a short twisting pan. CONSTITUTION:Coodinate axes of (x), (y), (z) are set by setting the inlet center of a strip 1 as an origin, and the outlet point of strip 1 is positioned on the line which connects the outlet point and the origin in the (y), (z) plane and slants by 45 deg. with respect to the (y) axis. In this way, the twisting shape of strip 1 is made to form the conical surface of an imaginary circular cone 4'. The inlet and outlet points of strip 1 are respectively pinched by inlet and outlet pinch rolls 2 and 3, and further, the entering and outgoing directions of strip 1 are made reverse to each other by 180 deg. at the circular conical part, by setting many small diametral rolls 6 having each a short surface length. Moreover, for preventing the meandering of strip 1, the rotating directions of the rolls 6 for forming the circular conical part are set to the same directions as the advancing direction of strip 1.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a strip twisting method in which the strip is twisted (twisted) during the feeding process of the strip material, and is particularly useful in terms of equipment and strip quality. This paper relates to a method of twisting strips that can be improved.

[Background of the invention]

For example, in a pressure treatment facility, the IJ tube material is generally fed with its surface facing upward or downward, that is, in a horizontal state.

By the way, if equipment (for example, a spiral louver) is installed in the rolling equipment that accepts the strip in a horizontal, ie vertical, state, the strip must be twisted 90 degrees before and after that equipment.

Conventionally, as shown in FIG. 1, for example, a method has often been used in which the strip 1 is twisted while the bus center Co remains in a straight line. That is, the strip 1, which has progressed in a horizontal state, is pinched in a 90° twisted state from the horizontal pinch rollers 2 to the vertical pinch rows 23, and transformed into a vertical state. However, in this conventional method, the twist length AAl, 8B, t at both ends of the strip at the twist portion is
The relationship between the center length of the bus and the center length CCt is A person! =BBtkiCC
The strip 1 is deformed as shown by the imaginary line. This deformation of the twist portion does not adversely affect the product shape of the strip 1, and it is necessary to minimize the amount of deformation. Therefore, in the conventional method, the twist span (between the horizontal twister 2 and the vertical pinch roller 3) has to be longer than a certain length, which has the disadvantage that the entire device becomes long.

In addition, in this conventional method, the strip 1 is given an unnatural shape, and when tension is applied, surface flaws, bends, etc. may occur, which may adversely affect the quality of the strip IJ. However, because of this, large tension cannot be applied, making it unsuitable for continuous equipment.

[Purpose of the invention]

An object of the present invention is to shorten the twist span, and
To provide a strip twisting method that can reliably prevent strip deformation and contribute to quality improvement.

[Summary of the invention]

In the twisting method according to the present invention, the strip curved surface of the twist portion is formed with a curved surface that can be developed into a flat surface (hereinafter referred to as a layer curved surface), so that the strip maintains a smooth curved surface.

In the first invention, the circular curved surface is twisted in a shape that follows a conical curved surface, and in the second invention, the circular curved surface is twisted in a shape that follows a cylindrical curved surface, so that the method is easy to use. (hereinafter referred to as conical guide and cylindrical guide, respectively)
.

The principle of the present invention will be explained with reference to FIGS. 2 to 9. First, the conditions for the conical guide will be explained. FIG. 2 shows the state in which the strip 1 is wound around the cone 4. If the strip entrance is ACB and the strip exit is AtCtBs, as long as the lengths of line segment AB and line segment AlBr are not extremely different, line segment A A
! and line segment BBt are approximately parallel. Therefore, . Therefore, La = AAt CCt --) ... (2) Lm≠BBt CC1 and IL + Lml = 0 ... (3) The positional relationship between the strip, the inlet, and the outlet of the strip is expressed by equation (3). If the following is satisfied, that is, if the length of the straight line connecting the edges and the center of the plate is the average length of both ends, then s) The IJ knob curved surface is formed by a cone. I'll come.

Next, the conditions for the cylindrical guide will be explained. Figure 3 shows the state in which the cylinder 5 is wrapped with an IJ tube l. In the case of a cylinder, immediately A A t = B B ! = CCt...(4)
Expressed by formula (2), LA = Ls = O or ILml + lLml = 0... (5) If the positional relationship between the pick, the inlet and the outlet of the strip satisfies formula (5), that is, If the lengths of the straight lines connecting the edges and the center of the plate are equal, the strip can be formed into a curved cylinder.

Figure 4 shows the positional relationship between the inlet and outlet of the strip using a coordinate system, and the symbol (CC) in this figure shows the positional relationship between the inlet and outlet of the strip.

=A, AB=b, entrance/exit angles θ, β) to express equation (2), where 1 is 1 when the y coordinate of B1 > the y coordinate of A I
When = y coordinate of IBl < y coordinate of AI, i=1.

Therefore, based on equations (6) and (7), the positional relationship (θ, β) of the entrance and exit that satisfies equations (3) (conditions for a conical guide) and equation (5) (conditions for a cylindrical guide) is determined. Let's look for each of them.

To explain the conical guide, the entrance/exit angle θ,
If one of β is fixed and changes in the other are examined, the relationships shown in FIGS. 5 and 6 will be obtained. The curves are basically the same shape, only the coordinate quadrants are different.

Next, the cylindrical guide will be explained. In the case of a cylindrical guide, the relationships are as shown in FIGS. 7, 8, and 9. Therefore (
5) There is no combination of θ and β that satisfies the equation, but a combination that approximately satisfies is 0 = sin-' (-i ta
nβ) − (8).

However, even if we find an exit position that satisfies the conditions for a conical guide and a cylindrical guide, there are an infinite number of exit positions, so the following conditions are set.

(a) The bus shape is simple (based on what is preferable in terms of guide design).

(b) Twist sation is reduced (based on the object of the present invention).

(c) Population and exit direction of inflow and outflow are O' and 90'
.

180° (based on building and layout conditions).

Considering the conical guide, the twist shape is conditional (A) to (
If the twist shape is created by taking all of the steps up to (c) into consideration, the 10th
As shown by 4' in the figure, it has a twisted shape guided by one virtual cone. As stated above, all combinations 1 to 4 have the same shape. With this, it is possible to guide with only one cone, the bus shape is simple, and at the same time, the entrance and exit directions are 180°, so it can be said to be the optimal twisting method.

Also, considering the cylindrical guide, it is impossible to twist even if the strip is wrapped around a single cylinder.
To twist, two or more cylinders are required, two being the minimum. A combination of an inlet and an outlet that satisfies the conditions for a cylindrical guide is a combination that satisfies equation (8). -As an example, when creating a twist shape, 5', 5" are shown in Figure 11.
As shown in , there are only two cylinders, and it can be said that the structure is simple.

Furthermore, in this case the curvature of the strip is proportional to the radius atsinβ, so in order to use the space most effectively, β
The optimum angle is 45°, which is the maximum angle.

Hereinafter, one embodiment of the first invention related to the conical guide will be described in the twelfth embodiment.
This will be explained with reference to all of FIGS.

Set the seat axis of xl"12 with the entrance center of strip 1 as the origin, and position the exit point on the yz plane on a line where the straight line connecting the exit point and the origin makes 45 degrees with the y axis. Then, the twisted shape of the strip 1 forms the conical surface of the virtual cone 4'.The entrance point is pinched by the inlet pinch roller 2, the exit point is pinched by the outlet pinch roller 3, and The part has a large number of small diameter rows 2 with a short surface length.
6 was installed so that the inlet direction and the outlet direction of the systrip 1 were 180° opposite to each other. In addition, strip 1
In order to prevent meandering, a small diameter roller 6 forming a conical surface is used.
The direction of rotation of the strip 1 is set in the same direction as the traveling direction of the strip 1, as shown in FIG. In addition, if the width of strip 1 is increased, the distance between the entrance point and the exit point is increased, and β
The position may be determined so that the value of is within the allowable range of 406° to 50° shown in FIG.

FIG. 14 shows an example of application to the inlet side of the spiral louver 100, in which the pinch roller 2.3 is disposed close to the spiral louver 10 as shown.

According to the strip twisting method according to such an embodiment, the exit point is located near the yz plane, and the straight line connecting the origin and the exit point is at an angular position of about 40° to 50° with respect to the two axes. , the strip is positioned so that the direction in which the strip advances from the exit point is opposite to the direction in which the strip advances to the origin, and the strip curved surface in the twisted part from the entrance to the exit is formed into one conical curved surface. It can be twisted from a horizontal state to a vertical state while maintaining its natural shape, and deformation unlike conventional methods does not occur.

Therefore, there are no surface flaws or bends, and good strip quality can be maintained. Moreover, since the twist shape can be shortened, it can greatly contribute to the reduction of continuous equipment.

Next, the second invention related to cylinders and guides will be incorporated into the 15th article.
This will be explained with reference to FIGS.

A coordinate axis of x+y+2 is set with the entrance center of the strip 1 as the origin, and the exit point is located on the yt plane, on a line where the straight line connecting the exit point and the origin makes 45 degrees with the y-axis. This allows the twisted shape of the strip 1 to become two virtual cylinders 5'.
, to form a 5" cylindrical surface.The entry point is at the inlet pin roller 22, and the exit point is at the exit pin roller 3.
By pinching each strip 10 and installing a large number of small diameter rollers 6 having a short surface length in the cylindrical portion, the entrance direction and the exit direction of the strip 10 are changed by 90°. In order to prevent the strip 1 from meandering, the rotating direction of the small diameter row 26 of the cylindrical portion is set in the same direction as the traveling direction of the strip. If the width of the strip changes, β will change, so as with the conical guide, make adjustments such as increasing the distance between the entrance and exit points, and the value of β will be as shown in Figures 7 and 8. The position should be determined so that it falls within the tolerance range shown.

Figures 17 and 18 show examples of application of the spiral louver 10 to entrances and exits. Figure 17 shows loop formation during feeding in one direction, and Figure 18 shows loop formation at the return point in the opposite direction. This was carried out.

According to such a configuration, the exit point is located near the r2 plane, the straight line connecting the origin and the exit point forms an acute angle to the two axes, and the direction in which the strip advances from the exit point is aligned with the origin. Since the IJ tube is positioned almost directly in the direction of entry, and the strip curved surface in the twisted part from the inlet to the outlet is formed into two cylindrical curved surfaces, the strip can be naturally twisted with a short twist span, as in the previous embodiment. Since the twisting operation can be performed accurately, the quality of the strip can be maintained and the process can be shortened. Particularly, this embodiment is suitable for directing toward the exit of the twist portion.

〔Effect of the invention〕

According to the present invention, it is possible to shorten the twist span and furthermore, twist the strip without causing unnatural deformation, thereby achieving excellent effects such as reducing space and being able to apply tension to the strip. be done.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the conventional twisting method, Figures 2 to 1
Figure 1 shows the principle of the invention, Figure 2 is a schematic diagram showing a strip wrapped around a cone, Figure 3 is a schematic diagram showing a strip wrapped around a cylinder, and Figure 4 is a schematic diagram showing a strip wrapped around a cylinder. A schematic diagram showing the positions of the inlet and outlet of the strip in the twist guide. Figure 5 shows β and LA when β is constant, and L to ILA.
A graph showing the relationship between 10 LBI, Figure 6 is a graph showing the relationship between θ and La, Lm lL, +Ln l when β is constant.
Figure 7 is a graph showing the relationship between β and IL MU 1 + LO 1 when β is constant, Figure 8 is a detailed section of Figure 7, and Figure 9 is the relationship between θ and IL & I + LB l when β is constant. FIG. 10 is a schematic diagram showing a conical guide, FIG. 11 is a schematic diagram showing a cylindrical guide, FIG. 12 is a perspective view showing an embodiment of the present invention, and FIG. 13 is a diagram showing the small diameter roller of FIG. 12. FIG. 14 is a schematic diagram showing an example of application to a spiral louver, FIG. 15 is an 8+ perspective view showing another embodiment of the present invention, and FIG. 16 is a diagram showing the small diameter roller of FIG. 15. 17 and 18 are schematic diagrams showing different examples of application to the Snowflake Rubber, respectively. l...Strip, 2...Enropinterola, 3.
... Out Robin Chiro - 2, 4... Cone, 5... Cylinder,
4'...Virtual cone, 5'...Virtual cylinder, 5''...
Virtual cylinder, 6... small diameter roller. Agent Patent Attorney Tatsuyuki Unuma $ 1 / Kaya 2 Ro Kaya 3 Figure Kaya 4- Eyes $f Mouth Kaya 7 Eyes Iρ Mouth Grass u p3 Deaf 3 1212) ■ 4' $13 Eyes $g Figure/. 15 pieces of thatch harden. Kaya/2 hard

Claims (1)

[Scope of Claims] ■ In the strip twisting method in which the strip material to be fed is twisted during the feeding, the center of the path at the twist portion is the origin, the center of the bus at the exit of the strip is the exit point, and the origin is The bus center line of the strip entering the line is the X axis, and the two axes are the imaginary line on the strip surface that is perpendicular to the X axis from the origin and is entering the origin.
Furthermore, an empty mJ coordinate thread is defined from the origin with the X-axis and a virtual line perpendicular to the At an angular position that makes an acute angle with respect to the IJ tube, the direction in which the strip advances from the exit point is opposite to the direction in which the strip advances to the origin. A strip twisting method characterized by forming a strip into a single conical surface. 2. In the strip twisting method in which the conveying strip suspension agent is twisted during the conveyance, the strip bus enters the origin at the twist part, with the path center of the strip inlet as the origin and the path center of the strip exit as the exit point. The center line is the X axis, the virtual line ft is on the strip surface that is perpendicular to the X axis from the origin and enters the origin, the X axis is y, and the virtual line is perpendicular to the X axis and the two axes from the origin, respectively
When the spatial coordinate system is set as an axis, the exit point is near the yz plane, and the straight line connecting the origin and the exit point forms an acute angle of 1 to 1 to the two axes, and the direction in which the strip advances from the exit point is is positioned opposite to the direction in which the strip enters at the origin, and the strip curved surface at the twist portion from the entrance to the exit is formed into two or more cylindrical curved surfaces.