JPH07132374A - Method for machining curved surface of end part of metal plate and device therefor - Google Patents

Abstract

PURPOSE:To provide a device capable of continuously and stabely forming a uniform and highly precise R-shape in the longitudinal direction of a metal plate's end part at a high machining speed with a simple device and an easy operation, and automatically performing the machining following in the shape of its ridge line. CONSTITUTION:This device is provided with torches 11, 12 for melting and solidifying an upper end ridge line of a metal plate A by irradiating it with an arc, an end surface guiding ring 3 and a profiling mechanism 13 for specifying the relative position between each torch and the metal plate A, a driving wheel 4 and a side surface guiding ring 7, and a motor 6 for relatively carrying a body 1 to the metal plate A on the body 1. And further the device is provided with a spring 10 the means for applying a pressing force between the driving wheel 4 and the side surface guiding ring 7, and the metal plate A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a curved surface of an end portion of a metal plate, and particularly to the end portion of the metal plate, in which melting by partial heating and subsequent solidification are performed in the longitudinal direction. The present invention relates to a method and an apparatus for performing a processing operation for continuously forming a curved surface on the portion by continuously performing the processing operation.

[0002]

2. Description of the Related Art Conventionally, as a case where it is necessary to perform curved surface processing on an end portion of a metal plate, for example, when a metal plate is coated with a paint, the end portion is left as a sharp cut surface. When paint is applied to a metal plate that has been coated, the paint applied to the surface does not continuously reach a constant thickness, and the continuity of the coating is disturbed at the edge of the cut surface, and the thickness of this part is extremely thick. A thin portion may occur, and the paint on the edge may be easily peeled off. In order to avoid such a result, there are many cases where the end portion is curved. The state is shown in FIG. The metal plate 31 in the figure has an edge portion 32 formed at the end. When the paint 33 is applied to the upper surface of the metal plate 31, the thickness p of the paint 33 becomes extremely thin at the edge portion 32, and It becomes difficult to secure the effect.

That is, such a thin portion of the paint 33 cannot sufficiently exert the effect of coating and causes peeling of the coating film from there, which is a cause of deteriorating so-called rust resistance. It will be. For example, when the quality of hull coating is regulated by the thickness of the coating film, such as coating on steel plates for shipbuilding, the unevenness of the coating film thickness as described above becomes a fatal problem for the coating work. Of nature. Furthermore, not only for shipbuilding, but when painting is generally applied to the part that comes into contact with water, a paint with particularly good rust resistance is used, so the coating film may be cut off by the edge part of the end. Should be avoided as much as possible.

In addition, when the metal plate is generally handled to avoid the problem of coating, and the end portion of the metal plate is left as a sharp cut surface, a hand is easily caught, which may cause an accident such as an injury, and transportation. There are also many disadvantages in the above handling, for example, in the work of lashing.

For the above reasons, there are many cases where it is necessary to perform curved surface processing on the end portion of a metal plate.
The conventional techniques for curved surface processing are as follows: a) Processing the curved surface of a metal plate by manually cutting the edge part by repeatedly applying a grinder to the edge part of the metal plate along the longitudinal direction. To do.

B) A self-propelled mechanical cutting machine is moved along the longitudinal direction of the end portion of the metal plate to repeat the cutting process for the portion, or conversely, the cutting machine is fixed and the metal plate is fixed. Is transferred to perform a cutting process to finish the polygonal pseudo curved surface (usually referred to as C-cut) (the left shoulder portion of the metal plate 31 in FIG. 5 has a C-cut shape of the edge portion finished in this way). Indicates).

There are methods such as Although not intended for a metal plate, as a conventional technique for processing the end portion of a metal wire into a curved surface, c) an end of a metal wire having excellent wear resistance, an arc such as an inert gas shield arc, or There is a technique for chamfering, hemispherical, or spherical processing of the portion by irradiating a laser beam to rapidly heat the terminal to cause melting and subsequent solidification (Japanese Patent Laid-Open No. 61-7477).
4).

[0008]

The prior arts configured as described above have the following problems when attempting to solve the problems of the present invention by these.

A) In the method of performing curved surface processing by a grinder operation by human power, there are problems such as non-uniform finish shape, slow processing speed and inefficiency.

B) In the case of mechanical cutting, a corner remains on the machined surface, resulting in a C-cut state shown in the left shoulder portion of FIG. 5, and a smooth curved surface shape along a constant radius r as shown in the right shoulder portion of FIG. It is difficult to realize (usually called R shape). If it is attempted to finish this into an R shape, it requires a considerable amount of time and effort.

C) The technique of Japanese Patent Laid-Open No. 61-74774 is a technique applicable only to the end of a metal wire, and the problem to be solved by the present invention, that is, the length of the edge of the metal plate is long. It cannot be a technique for continuously performing curved surface processing along the ridgeline of the direction.

The present invention has been made in view of the current state of the art as described above, and it is extremely easy to perform curved surface processing continuously along the ridge line formed in the longitudinal direction of the end portion of the metal plate. With a simple method and a simple device, it is possible to continuously and stably form a smooth R shape based on a uniform and accurate shape, and it is possible to carry out at a high processing speed, An object of the present invention is to provide a method and apparatus for processing a curved surface of an end of a metal plate, which can improve work efficiency, improve work reliability, improve product accuracy, and reduce cost.

Another object of the present invention is to add two simple ridges to two ridge lines, one formed at each end of each side of a metal plate with the thickness of the plate separated. Therefore, it is possible to perform curved surface processing in parallel at the same time, thereby further promoting work efficiency.

[0014]

As a means for solving the above-mentioned problems, in the method for processing a curved surface of an end portion of a metal plate according to the present invention, as shown in claim 1, the longitudinal direction of the upper end portion of the metal plate is set. A torch for irradiating a TIG arc, a laser beam, an electron beam, or the like at a predetermined angle along the ridge line of the torch, or by moving the metal plate with the torch fixed, the part on the ridge line A melting operation and a subsequent solidification are performed to form a curved surface in the portion.

In this case, as described in claim 2, the above-described curved surface processing which is continuously performed along the longitudinal direction of the upper end portion of the metal plate is performed at each upper end portion of both sides of the metal plate with the thickness of the plate separated. You may make it parallel in parallel with respect to each one formed ridge line.

Further, in the apparatus for processing a side surface of a metal plate according to the present invention, as in claim 3, a body for stationary and a metal plate for which a curved surface is processed at the end are transferred in the longitudinal direction. The device includes an end face guide wheel that holds the state of being pressed against the end faces of the end portions of the metal plate and rotates with the transfer of the metal plate, and is pressed against one side surface of the metal plate. A drive wheel that holds the above state to transfer the metal plate and a side guide wheel that rotates along with the transfer of the metal plate are provided, and the end of the metal plate faces the ridge line position on one side surface side. A torch for irradiating a TIG arc, a laser beam, an electron beam, or the like is provided in a copying mechanism provided with guide wheels that follow the position of the ridge line provided in front of and behind the torch, the mounting angle of which is adjustable, and the metal being transferred. With the drive wheels of the plate Means for triggering the pressing force of the mutual respect between the surface guide wheels is provided on the transfer device of the main body or a metal plate.

Alternatively, as described in claim 4, a metal plate to be curved is fixedly placed, and each guide wheel for restricting a relative position to the metal plate and a torch for curved processing are attached together with the copying mechanism. A transfer device for transferring the main body along the longitudinal direction of the metal plate is provided, and means for activating the pressing force in the direction toward the facing surface of the metal plate is provided to the respective guide wheels. It is also possible to adopt a configuration in which the fixed side and the transferred side are replaced by the relationship opposite to that of the above-mentioned claim 3 by being provided in.

[0018]

In the method for processing the curved surface of the end portion of the metal plate according to the present invention, in order to perform the curved surface processing on the end portion of the metal plate by the method as set forth in claim 1, the TI along the longitudinal ridgeline of the end portion.
A torch such as a G arc, a laser beam, or an electron beam is irradiated and moved at a predetermined angle. Then, due to the heating action of the arc or the like, partial melting and subsequent solidification occur on the metal plate on the ridge line, and the metal at the time of melting forms a correct R shape due to its surface tension, and the state as it is. At this point, cooling solidification occurs and solidification occurs, so that curved surface processing is performed on that portion. By performing this operation while continuously transferring along the longitudinal direction, the curved surface processing along the longitudinal direction of the end portion of the metal plate is continuously performed.

Further, as described in claim 2, the above-mentioned curved surface processing operation is performed on two ridge lines formed at each end of both sides of a metal plate with the thickness of the plate separated. On the other hand, by performing them in parallel at the same time, the work efficiency can be further promoted.

When the apparatus for processing the curved surface of the end portion of the metal plate is constructed as described in claim 3, the main body is fixed and is pressed against these guide wheels by the end guide wheels and the side guide wheels provided thereon. The position of the ridgeline of the metal plate transferred by the drive wheel is specified with respect to the main body under the control of the torch, and the torch is attached to the copying mechanism provided with guide wheels that follow the ridgeline before and after the torch. Since it is attached so that it can be adjusted, by accurately irradiating the position with a TIG arc or laser light or electron beam,
Based on the desired shape that is extremely accurate and uniform with respect to the position where the curved surface is processed and the curved surface shape to be formed,
A smooth R shape can be continuously and stably formed, and the state can be continuously and stably maintained along the longitudinal direction of the metal plate.

Further, as described in claim 4, the positions of the metal plate on the side to be curved and the main body on the side to be curved are interchanged, and the metal plate on the side to be processed is placed stationary. Alternatively, it is also possible to perform curved surface processing on the metal plate while moving the main body on the side to be processed along the longitudinal direction of the metal plate. In this case as well, similarly to the above, means for activating the pressing force in the direction toward the facing surface of the metal plate is provided for each guide wheel in the main body or the transfer device, and by this means the main body and the ridge line of the metal plate are connected. Since the relative position is specified for each ridge line and the torch is attached to the copying mechanism, the same operation as described above can be performed.

[0022]

Embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an example of a system in which the main body 1 is fixed and the metal plate A to be processed is transferred along the roller conveyor 2.

The end face guide wheel 3 is attached to the main body 1 downward, is pressed against the upper end surface of the metal plate A, and rotates with the transfer of the metal plate A, whereby the height between the main body 1 and the metal plate A is increased. This is for always keeping the distance in the direction at a constant value. The drive wheel 4 is fixed to the drive shaft 5 and is attached laterally to the main body 1. The drive wheel 4 is rotationally driven by the motor 6 while keeping its peripheral surface pressed against the one side surface Aa of the metal plate A. That is, in this embodiment, the metal plate A
A transfer device for transferring the motor has a motor 6 as a power source, and the driving force of the motor 6 is transmitted from the drive wheel 4 to the metal plate A through the drive shaft 5 by the frictional force between the pressed surfaces. The metal plate A is forced to be transferred along the roller conveyor 2, and at the same time, the horizontal distance between the main body 1 and the one side surface Aa of the metal plate A is always maintained at a constant value during the transfer.

Further, a side guide wheel 7 is pressed against the other side surface Ab opposite to the one side surface Aa of the metal plate A from a direction opposite to the drive wheel 4 so that both sides of the metal plate A are driven by the drive wheel 4. It is sandwiched by the side guide wheels 7 and guided along the roller conveyor 2. As a means for holding the metal plate A pressed from both sides through the space, a support fitting 8 for rotatably supporting the side guide wheel 7 is provided, and one end of the guide rod 9 is fixed to the upper end of the support fitting 8. Then, the guide rod 9 is held on the main body 1 so as to be slidable in the longitudinal direction, and the spring 10 is attached to the other end. The elastic force of the spring 10 causes the support fitting 8 to move the support plate 8 to the metal plate A through the guide rod 9. The horizontal relative position of the metal plate A sandwiched between the side guide wheel 7 and the drive wheel 4 with respect to the main body 1 is determined very accurately.

Reference numeral 11 denotes a TIG torch for processing a curved surface along the ridgeline on the side surface Aa of the metal plate A, and 12 is a TIG torch for processing a curved surface on the side surface Ab of the other side.
The torches 1 and 12 are attached to the copying mechanism 13 provided with guide wheels 14 that follow the ridge angle positions of the end faces of the metal plates provided in front of and behind them so that the torch angle can be adjusted by the angle adjustment fitting 16. With this configuration, each torch has a copying mechanism 13
With this, it is possible to always accurately capture the ridge angle position. The torches 11 and 12 irradiate arcs 15 (see FIG. 2) toward the ridgelines of the metal plates A facing each other, and the portions are partially melted and subsequently solidified to melt the metal. By utilizing the surface tension, an R-shaped curved surface having a regular shape can be formed in the portion.

Next, a description will be given of an operation mode in which the curved surface processing device for the end portion of the metal plate having the above-described structure performs curved surface processing. By driving the motor 6 on the main body 1 to rotate the drive wheel 4 via the drive shaft 5, a spring 10 acts between the side guide wheel 7 and the drive wheel 4 which are pressed in the direction of the drive wheel 4. The longitudinal transfer force is transmitted to the sandwiched metal plate A by the frictional force generated between the metal plate A and the drive wheel 4, and the metal plate A is transferred along the roller conveyor 2. The irradiation angles of the respective arcs 15 of the torches 11 and 12 are adjusted in advance, and the irradiation of the arcs and the transfer of the metal plate A are accurately started along the guide wheel 14 that follows the ridgeline of the metal plate A.

Therefore, because of this structure, the ridgeline that is irradiated by each arc is always placed in a constant and invariable relational position with respect to the position of each torch, and the accuracy is extremely high before and after the work. The work result can be obtained. Even if the thickness of the metal plate A to be processed changes, one end of the copying mechanism 13 is swingably locked on the main body 1 and the other end is supported by the ridge line of the end face of the metal plate A. Therefore, the work can be performed with high accuracy according to the change in the plate thickness only by changing the mounting angle of the torch.

FIG. 3 shows a different embodiment, in which the system of FIGS. 1 and 2 is a system in which the main body is fixedly placed and a metal plate whose end is curved is transferred in the longitudinal direction. On the other hand, the one shown in FIG. 3 has a system in which a metal plate to be curved is placed in a fixed position and the main body on the side to be processed is moved along the longitudinal direction of the metal plate. Except for the difference in the structure required for the difference, there is almost no difference in the work structure for the curved surface processing. Referring to FIG. 3, the main body 17 is provided with legs 18, 18 in a form of straddling the metal plate A, and each leg 18 has casters 19 mounted on the lower part thereof, whereby the pair of left and right rails 20 are mounted. It is mounted so that it can run. The metal plate A has a pressing member 21 and a receiving plate 22 on both lower side surfaces.
It is fixed in place by tightening with.

In the embodiment shown in FIG. 3, the device for transferring the main body 17 is such that the drive wheel 4 is rotated by the power source motor 6 via the drive shaft 5 while being pressed against the metal plate A. Is completely the same as that of FIG. 1, but in this embodiment, the main body 17 is moved to the rail 2 by the reaction force of the frictional force.
They differ in that they are transported along 0. In addition, the function of processing the curved surface of the end portion of the metal plate is the same as that described in the embodiment of FIGS.

As an example of the case where the system shown in the embodiment of FIG. 3 is required, for example, when a metal plate to be curved is of a large size or has a large weight, it is necessary to transfer it. When it is extremely difficult to apply the method, it is possible to improve the work efficiency more than expected by applying this method.

[0031]

Since the method and apparatus for processing the curved surface of the end portion of the metal plate of the present invention is configured as described above, the following effects can be obtained.

1) In claim 1, a curved surface is formed on the edge of the metal plate by causing partial melting and subsequent solidification to be performed continuously along the longitudinal direction. Therefore, a smooth R shape can be continuously and stably formed with a uniform and accurate shape by a simple method. Moreover, since the processing speed is high, it is possible to improve the work efficiency and the work reliability, improve the accuracy of the product and reduce the price.

2) In claim 2, the curved surface processing according to the method of claim 1 is simultaneously performed in parallel with respect to each ridge line formed on each end of both sides of the metal plate. Can be improved.

3) According to a third aspect of the present invention, a stationary main body and a transfer device for transferring a metal plate having a curved end processed in a longitudinal direction are provided, and the longitudinal ridge line of the end of the metal plate is provided. Since it is configured to irradiate a TIG arc, a laser beam, an electron beam, or the like with a relative position to the ridge line always constant, it is possible to perform work with extremely high processing accuracy at a high processing speed as compared with the conventional device. It can be implemented based on

4) In claim 4, a metal plate to be curved is fixedly placed, and a main body provided with guide wheels for restricting a relative position to the metal plate and a torch for curved processing is made movable. Since it has been configured, if the metal plate has a long size, or if the weight of the metal plate is so great that it is extremely difficult or disadvantageous to transfer it, raise the work efficiency higher than expected. You can

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a curved surface processing apparatus according to the present invention.

2 is a side view of the embodiment of FIG. 1. FIG.

FIG. 3 is a front view showing another embodiment of the curved surface processing apparatus according to the present invention.

FIG. 4 is an explanatory diagram regarding a conventional technique.

FIG. 5 is an explanatory diagram of a processed curved surface.

[Explanation of symbols]

 1,17 Main body 2 Roller conveyor 3 End guide wheel 4 Drive wheel 5 Drive shaft 6 Motor 7 Side guide wheel 8 Support metal fitting 9 Guide rod 10 Spring 11, 12 Torch 13 Copying mechanism 14 Guide wheel 15 Arc 16 Angle adjustment metal fitting 19 Caster 20 rail 21 pressing tool 22 receiving plate A metal plate

Claims (4)

[Claims] 1. A method of continuously performing curved surface processing on an end portion of a metal plate along a longitudinal direction, wherein a TIG arc, a laser beam, an electron beam or the like is formed along a longitudinal ridgeline of an upper end portion of the metal plate. Is moved by moving a torch for irradiating at a predetermined angle, or by fixing the torch and moving a metal plate to cause partial melting on the ridge line and subsequent solidification. A method for processing a curved surface of a metal plate end, characterized by performing a processing operation of forming a curved surface on the portion. 2. The curved surface processing, which is continuously performed along the longitudinal direction of the upper end portion of the metal plate, is performed on each of the upper end portions of both sides of the metal plate with the thickness of the plate separated from each other. The method for processing a curved surface of an end portion of a metal plate according to claim 1, wherein the curved surface processing is performed in parallel with the ridge line of the above. 3. An apparatus for continuously performing curved surface processing on an upper end portion of a metal plate along a longitudinal direction, wherein a stationary body and a metal plate whose end portion is curved are transferred in the longitudinal direction. With a transfer device, the body is pressed against one end of the metal plate, and the end face guide wheel that keeps the state pressed against the end face of the metal plate from both sides and rotates with the transfer of the metal plate. A drive wheel for holding the fixed state to transfer the metal plate and a side guide wheel that rotates with the transfer of the metal plate are provided, and the end of the metal plate faces the ridgeline position on one side surface side. TI
A torch for irradiating a G arc, a laser beam, an electron beam, or the like is provided on the front and rear of the torch with a copying mechanism provided with a guide ring for copying the position of the ridge line, the mounting angle of which is adjustable, and the metal being transferred. A curved surface machining device for an end portion of a metal plate, characterized in that means for activating mutual pressing force between the drive wheel of the plate and the side guide wheel is provided in the main body or the transfer device of the metal plate. 4. A body in which a metal plate to be curved is fixedly mounted and each guide wheel for restricting a relative position to the metal plate and a torch for curved processing are attached to a copying mechanism in a longitudinal direction of the metal plate. A transfer device for transferring along the direction,
4. The curved surface processing apparatus for an end portion of a metal plate according to claim 3, wherein the main body or the transfer device is provided with means for activating a pressing force in a direction toward the facing surface of the metal plate for each of the guide wheels.