JPS623689B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll for a roll forming machine, and in particular to a roll forming method aimed at reducing the manufacturing cost of roll forming products when forming multiple types of roll forming products having different axial dimensions. This relates to machine rolls.

BACKGROUND OF THE INVENTION Conventionally, roll-formed products formed by a roll-forming machine include steel sections having shapes as shown in FIGS. 1 to 3. Therefore, FIG. 1 is a front view showing an example of the hat section steel, FIG. 2 is a front view showing an example of the light groove section steel, and FIG. 3 is the width of the hat section steel according to FIG. 1. It is a front view showing three types of hat sections differing only in directional dimensions.

In this case, when constructing a structure, depending on its use, as shown in Fig. 3 a, b, c, it is necessary to
A, 1B, and 1C are often used.

Hereinafter, the conventional roll forming method for forming the above-mentioned hat section steel and its problems will be explained using FIGS. 4 and 5.

FIG. 4 is a sectional view showing an example of a roll (one roll example) in the final step of a conventional roll forming machine and a hat-shaped steel formed by the roll.

In this Fig. 4, 6A is the upper roll shaft, 3
is an upper roll fitted into the upper roll shaft 6A,
5A is a key for fixing the upper roll 3 to the upper roll shaft 6A, 6B is a lower roll shaft, 4 is a lower roll fitted into the lower roll shaft 6B, and 5B is a key for fixing the lower roll 4 to the lower roll shaft 6B. This is the key.

Between the upper roll 3 and the lower roll 4 of the rolls configured in this way, the roll-formed product formed in the preceding steps is further pressure-formed to form a hat-shaped steel 1 in a desired shape. be able to.

However, when forming a plurality of types of hat shaped steels that differ only in the widthwise dimension W, it is necessary to prepare upper rolls 3 and lower rolls 4 only for those types. The same applies to rolls in other processes.

In addition, the roll replacement work in this case has the disadvantage that it takes a lot of time to move the upper roll 3 and lower roll 4 in the roll axis direction and take them in and out of the upper roll shaft 6A and lower roll shaft 6B. It was hot.

FIG. 5 is a sectional view showing another example of a roll (an example of a split roll) in the final step of a conventional roll forming machine and a hat-shaped steel formed by the roll.

In FIG. 5, the same parts as in FIG. 4 are denoted by the same numbers. And 3a, 3b,
3c is upper divided rolls a, b, c, and 7A that are fitted into the upper roll shaft 6A and constitute the upper roll.
The upper divided rolls a and 3a are connected to the upper roll shaft 6A.
The keys 4a, 4b, and 4c are fitted into the lower roll shaft 6B, and the lower divided rolls a, b, c, and 7B that make up the lower roll are fixed to the lower roll shaft 6B. This is the key to

In this way, in a roll for a roll forming machine formed by combining a plurality of split rolls, the width direction dimension W
When forming multiple types of hat shaped steel that differ only in the shape, it is necessary to prepare annular upper split rolls b, 3b and lower split rolls b, 4b with different axial lengths L for each type. , the above-mentioned fourth
Although the roll cost is lower than that of the conventional example shown in the figure, it still has the disadvantage that it takes time to replace the rolls.

The present invention eliminates the drawbacks of the prior art described above, and provides a roll for a roll forming machine that reduces roll costs and reduces roll replacement work time when forming multiple types of roll molded products with different width dimensions. Its purpose is to provide the following.

A feature of the present invention is that in a roll for a roll forming machine formed by combining a plurality of divided rolls, at least one of the divided rolls is a combination of stepped rolls provided with stepped steps in the circumferential direction, The present invention provides a roll for a roll forming machine in which the axial width of the stepped roll can be changed by changing the combination angle.

The present invention will be explained below with reference to Examples.

6 is a plan view of a stepped roll according to an embodiment of the present invention, FIG. 7 is a cross-sectional view in FIG. 6, and FIG. 8 is a circumference of the stepped roll according to FIG. 6. 9 to 12, which are developed views showing changes in axial height with respect to direction angle, are sectional views showing how the stepped rolls of FIG. 6 are combined and changes in axial length.

In FIG. 6, reference numeral 8 denotes a stepped roll having stepped steps in the circumferential direction, and the inner diameter side thereof has a hollow cylindrical shape so that it can be fitted into the roll shaft. As shown in FIG. 8, the axial height of the steps changes every π/4 radian (that is, there are 8 steps in the circumferential direction), with a minimum height of h ₁ and a maximum height of h ₁ +h ₂
+h ₃ +h ₄ =H (where h ₁ =h ₂ =h ₃ =h ₄ =h), and these steps are formed axially symmetrically.

A pair of stepped rolls 8 configured in this way
As shown in FIGS. 9 to 12, the axial length L can be adjusted by combining the stepped sides so that they face each other, and by changing the combination angle as described later.
can be changed in four ways, such as H+h, H+2h, H+3h, and 2H.

13 and 14 are front views showing an example of a lower roll for a roll forming machine incorporating a lower divided roll formed by combining the stepped rolls according to FIG. 6, and in which the combination angle of the stepped rolls is changed. By this,
The width of the roll in the axial direction is changed.

In each figure, parts given the same numbers as in FIG. 5 are the same parts. 4b ₁ and 4c ₁ are both stepped rolls 8 having stepped steps in the circumferential direction.
This is a lower split roll whose axial length can be changed by combining two rolls (see FIG. 6) facing each other and changing the combination angle.

FIG. 13 shows a combination of the stepped rolls 8 of the lower split roll 4b ₁ in the state shown in FIG. 10 (axial length H+
2h), where the axial width of the roll is _W1 .
At this time, the stepped roll 8 of the lower divided roll _4c1 is assembled in the state shown in FIG. 11 (axial length H+3h).

FIG. 14 shows the combination angle of the stepped rolls 8 of the lower divided roll 4b ₁ from the state of FIG.
4) x 2 radians, that is, the state shown in Fig. 12 (axial length 2H) is changed in two steps, and the axial width of the roll is W ₂ = W ₁ + 2h (combined angle of stepped rolls). (We will discuss how to change this later). At this time, the stepped roll of the lower divided roll _4c1 is changed from the state shown in FIG. 11 by π/4 radian, that is, by one step, to the state shown in FIG. 10 (axial length (H+2h)), and the said roll The axial length of the split rolls 4c ₁ on both sides is decreased by the increase in the axial width W ₂ - W ₁ = 2h (h on one side,
2 hours on both sides), the roll length and roll center position P of the roll for a roll forming machine remain unchanged.

To change the combination angle of the stepped rolls, loosen the roll set screws (not shown) on the stand side of the movable roll of the roll forming machine, and each lower divided roll 4a, 4b ₁ , 4c ₁ will be connected to the lower roll. Since it is in a state where it can freely move in the axial direction on the shaft 6B, by rotating each of the stepped rolls 8 in this state, the combination angle is changed and the axial length is set to the desired length. After that, the roll set screw may be tightened again.

In the above embodiment, eight steps were provided in the stepped roll 8 axially symmetrically, but the number of steps is arbitrary, and the steps need not be equal (i.e., h ₁
≠h ₂ ≠h ₃ ≠h ₄ ), and the steps need not be provided axially symmetrically.

Furthermore, in the embodiment, the lower divided roll 4 can change the axial width of the roll.
When changing the combination angle of the stepped rolls 8 of this lower divided roll 4b ₁ from the state shown in Fig. 10 to the state shown in Fig. 12 on both sides of b ₁ and changing the axial width of the rolls from W ₁ to W ₂ , Before and after this change, by changing the respective combination angles from the state shown in FIG. 11 to the state shown in FIG. 10, the roll length l and roll center position P of the roll for the roll forming machine can be kept unchanged. A lower divided roll 4c _{1 is provided, which is a combination of two stepped rolls 8 having stepped steps in the circumferential direction, but instead of these lower divided rolls 4c 1 ,} a conventional lower divided roll 4c
(see FIG. 5), but as in the above embodiment, the lower divided roll _4c1 consisting of a combination of stepped rolls 8 is used to determine the roll length l of the roll for the roll forming machine and the roll length l of the roll for the roll forming machine. An advantage of not changing the center position P is that it is easier to attach to the roll forming machine main body (not shown).

Furthermore, although the above embodiments have been explained with respect to the lower roll, it goes without saying that the present invention is equally applicable to the upper roll.

According to the embodiment described above, by utilizing the fact that the axial length changes by changing the combination angle of two stepped rolls, these stepped rolls are replaced with a part of the conventional split rolls. As a result, the axial width of the roll can be adjusted to a desired length without replacing the roll or removing the roll from the roll shaft.

Therefore, roll forming of similar-shaped steel sections with different width dimensions can be done simply by adjusting the axial length by changing the combination angle of the stepped rolls, without having to replace the rolls as in the conventional method. It is possible to significantly shorten the work time for changing rolls, reduce the types and number of rolls, and significantly reduce the manufacturing cost of products with similar shapes.

As described in detail above, according to the present invention, in a roll for a roll forming machine which is formed by combining a plurality of split rolls, at least one of the split rolls is provided with stepped steps in the circumferential direction. The split roll consists of a combination of stepped rolls, and by changing the combination angle, the axial width of the stepped roll can be changed, making it possible to form multiple types of roll-formed products with different width dimensions. It is possible to provide a roll for a roll forming machine that has low roll cost and shortens the time required for replacing the roll.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the hat section steel, Fig. 2 is a front view showing an example of the light groove section steel, and Fig. 3 is only the width direction dimension of the hatch section steel according to Fig. 1. Front view showing three types of hat sections with different values, No. 4
The figure is a cross-sectional view showing an example of a roll in the final process of a conventional roll forming machine (example of one roll) and a hat section formed by the roll. FIG. 6 is a sectional view showing another example of a roll in the process (an example of a split roll) and a hat-shaped steel formed by the roll, and FIG. 6 is a plan view of a stepped roll according to an embodiment of the present invention. 7 is a sectional view in FIG. 6, FIG. 8 is a developed view showing changes in axial height with respect to circumferential angle of the stepped roll according to FIG. 6, and FIGS. 9 to 12 are FIG. 6 is a sectional view showing how the stepped rolls are combined and changes in axial length, and FIGS. 13 and 14 are rolls incorporating a lower split roll formed by combining the stepped rolls shown in FIG. 6. It is a front view showing an example of a lower roll for a forming machine, and the axial width of the roll is changed by changing the combination angle of the stepped rolls. 4a, 4b ₁ , 4c ₁ ...lower divided roll, 8...stepped roll.

Claims (1)

[Scope of Claims] 1. In a roll for a roll forming machine that is formed by combining a plurality of divided rolls, at least one of the divided rolls is composed of a combination of stepped rolls provided with step-like steps in the circumferential direction. A roll for a roll forming machine, characterized in that the stepped roll has a divided roll whose axial width can be changed by changing the combination angle. 2. When changing the combination angle of the stepped rolls of the divided rolls to change the axial width of the rolls, on both sides of a split roll whose axial width can be changed, The roll length and roll center position of rolls for roll forming machines can be kept unchanged by changing the combination angle of the split rolls. A roll for a roll forming machine according to claim 1, which is provided with a roll forming machine.