JPS6277122A - Two piece roll bending machine for forming metallic cylinder making stepping on end part - Google Patents

Abstract

PURPOSE:To reduce the production cost and to increase the product quality by arranging a rotatable rigid body roll on the end part of the elastic body fitted to the 1st roll and by setting diameter of the end part of the 2nd roll corresponding to the 1st roll. CONSTITUTION:A rigid ring 221 is fixed to the center part of a core metal 220 and an elastic body 222 is fitted thereon and rigid ring 224 is fitted to the outside of the end part thereof as well in the 1st roll 22. Then, via a bearing 225 on the ring 224 a rigid body roll 226 is fitted rotatably. The shape of the 2nd roll 24 is set corresponding to the 1st roll 22. When a work is inserted between the rolls 22, 24, the work is as a whole formed in circular arc shape and simultaneously formed with drawing with the action of the roll 226 and the 2nd roll 24. Consequently the forming is completed in one stage and the production cost is reduced and with the forming wrinkles prevention, etc., the product quality is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION (11. Industrial Application Fields) The present invention is directed to a roll bending machine consisting of two rolls (hereinafter referred to as "
The present invention relates to manufacturing and providing metal cylindrical molded products having both or one end thereof narrowed using a "two-roll bending machine".

(2) Prior art Until now, there was no technology for producing a metal cylindrical molded product with both or one end thereof narrowed or expanded in one step using a two-roll bending machine.

In other words, until now, a two-roll bending machine was used,
To manufacture a metal cylindrical molded product with both or one end narrowed or expanded, the first step is to create a step on both or one end of the workpiece using a press or press brake, and then As a second step, the processed material provided with the step was subjected to a two-roll bending machine to produce a cylindrical molded product with both or one end narrowed or expanded.

(3) Problems to be solved by the invention In the conventional technology as described above, ■ Before using a two-wood roll bending machine to obtain a metal cylindrical molded product with both or one end narrowed or expanded; As a step, it was necessary to provide a step at both or one end of the processed material, which required time, labor, equipment, space, expenses, etc., and was extremely uneconomical. ■ In addition, the step created in the processed material in the first process,
Since the material is stretched in the second step, wrinkles tend to occur in the processed material, and it is difficult to obtain a uniform finish.

(4) Means for solving the problems The present invention provides the following features: ■ In a two-roll bending machine composed of a first roll equipped with an elastic body and a second roll made of a rigid body, A roll of a rigid body capable of arbitrary rotation is provided at both or one end of the elastic body with the same diameter as that of the elastic body, or a diameter larger or smaller than this. A two-roll bending machine, characterized in that the diameter of both or one end of the second roll is smaller or larger than that of the center part.■ In the roll bending machine of item 1, Two rolls characterized in that an elastic body attached to the first roll and a rigid body roll rotatably attached to both or one end thereof are movable and adjustable in the longitudinal direction of the first roll. It is a bending machine.

The present invention employs the above-described configuration in a two-roll bending machine to obtain a metal cylindrical molded product with both or one end narrowed or expanded.
There is no need to provide a step on the workpiece using a press or press brake as a step before using the two-roll bending machine, and the workpiece can be applied directly to the two-roll bending machine configured according to the present invention. This allows the previous first step to be omitted, saving time, labor, equipment, space, expenses, etc., as well as eliminating defects such as wrinkles on the molded product, and ensuring a uniform finish for each molded product. It became possible to obtain.

Hereinafter, the configuration of the present invention will be described with reference to embodiments.

FIG. 1 shows that in the two-roll bending machine 10, when the diameter of the rigid roll 226 of the first roll 22 is the same as the diameter of the elastic body 222, FIG. When the diameter of the roll 226 is larger than the diameter of the elastic body 222, FIG. 3 shows each embodiment where the diameter of the rigid roll 226 of the first roll 22 is smaller than the diameter of the elastic body 222. It is something.

In FIGS. 1, 2, and 3, the first roll 22 has a rigid ring 221 non-rotatably attached to the central part of a mandrel 220, and an elastic body 222 mounted thereon. A rigid ring 224 is non-rotatably attached to the outside of both ends, and a rigid roll 226 is attached thereon via a bearing 225 so as to be rotatable.

On the m side, the shape of the second roll 24 corresponding to the first roll 22 is, when the diameter of the rigid roll 226 of the first roll 22 is the same as the diameter of the elastic body 222, or when it is larger than this, As shown in FIGS. 1 and 2, the second roll 2
4 is made smaller than the diameter of the end portion thereof, and if the diameter of the rigid roll 226 of the first roll 22 is smaller than the diameter of the elastic body 222, the third As shown in the figure, the diameter of the central portion of the second roll 24 is larger than the diameter of its end portions.

Further, the shape of the side surface of the rigid roll 226 of the first roll 22 that contacts the elastic body 222 can be any shape as shown in 1 to 6 in FIG. The shape is also made to correspond to this, thereby making it possible to obtain molded products with different shapes.

FIG. 4 shows an embodiment in which the elastic body 222 and the rigid body rolls 226 at both ends of the first roll 22 can be moved and adjusted in the longitudinal direction. The key 227 is fitted and fixed, and the key 227 is engaged with the grooves provided in the rigid rings 221 and 224 mounted on the mandrel 220 so that the key 227 can be slid in the longitudinal direction but not rotated. As a result, the elastic body 222 mounted on the rigid ring 221 and the rigid roll 226 rotatably mounted on the rigid ring 224 are moved in the longitudinal direction, respectively, to any desired position. in,
It can be fixed with a stopper 228.

As a result, in FIG. 6, the first roll a, b,
Curve and second roll 1. The gap between the bl 1 curve and
1st roll a2b, curve and 2nd roll al 2b+
It is possible to freely adjust the gap between the two curves so that they are the same, or so that one curve is large and the other is small.

In the embodiment shown in FIGS. 1 to 3 above, there are two rigid rolls on both sides of the elastic body 222 of the first roll 22.
The case where two 26 are installed is shown,
There may be one rigid roll 226.

Furthermore, in the embodiments shown in FIGS. 1 to 3, even if the first roll is a pressing roll and the second roll is a pressed roll, the first roll is a pressed roll and the second roll is a pressed roll. Even if the roller is a pressure roll, there is no particular influence on the structure of the present invention.

(5) Effect Next, the effects of the present invention will be explained with reference to examples.

(5-1) Two-roll bending machine 1 shown in Figures 1 and 2
0, when the workpiece is inserted between the first roll 22 and the second roll 24 that are pressed and rotated, the workpiece as a whole is formed into an arc shape around the rigid second roll 24. However, at the same time, the first roll 220
Due to the action of the rigid roll 226, which has a diameter equal to or larger than the diameter of the elastic body 222, and the corresponding portion of the second roll 24, both ends of the workpiece are more rigid than the central part. Molding is performed in the narrowed shape.

In addition, in the two-roll bending machine 10 shown in FIG. 3, between the first roll 22 and the second roll 24 that press and rotate,
When the workpiece is inserted, the workpiece is formed into an arc shape as a whole around the rigid second roll 24, but at the same time, the workpiece is formed into an arc shape with a diameter smaller than the diameter of the elastic body 222 of the first roll 22. Due to the action of the rigid roll 226 and the corresponding portion of the second roll 24, both ends of the workpiece are formed into an enlarged shape compared to the central part.

(5-2) In the first roll 22, since the diameter of the elastic body 222 and the diameter of the rigid body roll 226 are different, the rigid body
26 is allowed to rotate freely, thereby matching the speed of the outer peripheral portion of the elastic body 222 that contacts the workpiece with the speed of the outer peripheral portion of the rigid roll 226, so as to prevent twisting of the workpiece. There is a need to. This point is one of the points of the present invention.

(5-3) In the two-roll bending machine 1o shown in FIG. 2, the gaps between the a, b, curves of the first roll and the al, bl 1 curves of the second roll and the first roll's curves shown in FIG. a
If the gaps between the z b2 curve and the al and bl 2 curves of the second roll are the same, the narrowing of both ends of the molded product will occur equally on the left and right sides, but on the other hand, the gap on one side is small and the narrowing on the other side is the same. When the gap is large, the narrower the gap, the tighter the narrowing of the ends, and the larger the gap, the looser narrowing of the ends; therefore, the narrowing of both ends of the molded product will not be equal on the left and right sides.

Therefore, in order to obtain a molded product with equal narrowing of both ends on the left and right sides, in order to make the left and right gaps between the first roll and the second roll the same as shown in FIG. 22 elastic bodies 222 and rigid body rolls 226 are moved and adjusted in the longitudinal direction and fixed.

Further, in order to obtain a molded product in which the narrowing of both ends is not equal on the left and right sides, the gaps on the left and right sides may be intentionally set so as not to be the same.

(6) Effects The effects of the present invention are, first of all, as mentioned above, when manufacturing a metal cylindrical molded product in which both or one end is narrowed or expanded, it is possible to As a step before using a bending machine, it is possible to omit the step of creating a step on both or one end of the workpiece, which saves time, labor, equipment, space, expenses, etc. required for this pre-process. Moreover, by using the present invention, problems such as wrinkles do not occur in the molded products, and it is possible to obtain a uniform finish for each molded product. The point is that

In addition, when producing a second roll, which is an embodiment of the present invention, in which the diameter of both or one end is made smaller or larger than that of the central part, since this is made of a rigid body, However, as mentioned above, since it is possible to move and adjust the elastic and rigid rolls of the first roll in the longitudinal direction, it is possible to provide a manufacturing tolerance for the second roll. , the time and cost for manufacturing the second roll can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention in which the diameter of the rigid roll 226 of the first roll 22 is the same as the diameter of the elastic body 222, and FIG. 2 is a perspective view of the rigid body roll 226 of the first roll 22. FIG. 3 is a front view of an embodiment of the present invention in which the diameter of the first roll 226 is larger than the diameter of the elastic body 222. FIG. 4 is a front view of an embodiment of the present invention when
5 is a side view of an embodiment in which the elastic body 222 attached to the roll 22 and the rigid body 226 attached to both or one end of the roll are movable and adjustable in the longitudinal direction of the first roll; FIG. 6 are front views of the shapes of the side surfaces of the rigid roll 226 of the first roll 22 that contact the elastic body 222, and the corresponding shapes of the second roll 24;
FIG. 6 is an enlarged view of the correspondence between the first roll 22 and the second roll 24. 102 roll bending machine 12 Frame 14.16 Stand 22 First roll 220 First roll core 221 Rigid ring 222 Elastic body 224 Rigid ring 225 Bearing 226 Rigid roll 227 Key 228 Stopper 24 Second roll

Claims (2)

[Claims] (1) In a two-roll bending machine composed of a first roll equipped with an elastic body and a second roll made of a rigid body, at both or one end of the elastic body attached to the first roll, A roll of any rotatable rigid body is provided with a diameter equal to, or larger or smaller than, the diameter of the elastic body, and a corresponding roll of both or one end of the second roll is provided. A two-roll bending machine characterized by having a diameter that is either smaller or larger than that of its central portion. (2) In the roll bending machine set forth in paragraph 1, move the elastic body attached to the first roll and the rigid body roll rotatably attached to both or one end of the elastic body in the longitudinal direction of the first roll. A two-roll bending machine that is adjustable.