JPH082473B2 - Method and apparatus for processing edge roll of metal plate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge roll processing method and apparatus for crushing a corner portion formed on a cut end surface of a steel plate or other metal plate material.

[0002]

2. Description of the Related Art Generally, a metal plate material obtained by slitting a wide rolled material into a predetermined width is used as a processing material for metal products. Sharp slits are formed on the slit surface of the metal plate, and burrs are sometimes formed. Therefore, depending on the product to be processed, there is a problem in that there is a sharp portion in the finished state, and therefore, a corner is scraped off after the working finish, or a treatment for eliminating the corner is performed before the working finish.

For example, in roll forming of a rim of an automobile wheel, the slit surface of the metal plate material becomes the end surface of the rim and the tire bead holding flange. For this reason, if this portion is sharp, it is easy to cut hands during the work of handling the wheels, which is dangerous. Further, there is a problem that the paint is difficult to adhere to the sharp portion, and as a result, rust is easily generated during use. Therefore, before roll-forming the rim of an automobile wheel, a process of rounding the corners of the slit surface of the metal plate material has been performed.

In this edge roll processing, as shown in FIG. 4, while the plate material 1 is being transferred, a roll R having arcuate outer peripheral surfaces Ra is pressed against the end faces of both side parts of the plate material to press the upper and lower corners 3, 3. It was a method of crushing.

[0005]

However, in the above-mentioned conventional edge roll method, the crushed portion is pushed to the front surface 1a and the back surface 1b of the plate material 1 and rises, which may adversely affect the accuracy and appearance of the product. there were.

When the plate thickness of the plate material 1 changes, the contact angle between the corner 3 of the plate material and the roll R varies depending on the contact position, as indicated by the dotted line in FIG. It was not possible to squeeze the corners in the same way, and we had to prepare several types of rolls depending on the plate thickness. Not only is the roll manufacturing cost high, but also the tendency to produce a wide variety of products in small quantities requires a lot of complicated roll replacements in recent years, resulting in very poor productivity. there were.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide an edge roll processing method and an apparatus therefor which do not require roll replacement and are excellent in productivity. It is in.

[0008]

In order to solve the above-mentioned problems, an edge roll processing method according to the present invention carries out planar compression processing at different angles on the upper and lower corners of both end faces while transferring a metal plate material. It is applied in stages.

Further, in the edge roll processing apparatus of the present invention, a set of two V-shaped rolls facing each other in the horizontal direction with a metal plate material transfer path sandwiched therebetween are arranged in parallel with each other in a plurality of sets with independent pressurizing mechanisms. The angle of the V-shaped portion of the roll is different for each set.

[0010]

When the metal plate material is edge-rolled, the upper and lower corners of the end faces on both sides become a shape that approximates a curved surface by the planar compression processing in which the angle is changed stepwise, and the surplus is on the side surface of the material. Is deliberately pushed to. Further, even if the plate thickness of the metal plate material changes, the contact angle between the metal plate material and the roll becomes constant regardless of the contact position due to the V-shaped roll.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1 (a), a plate material 1 slit into a predetermined width has corners 3 above and below a slit surface 2.
Are formed respectively.

In the edge roll processing method of the present invention, first, as a first step, while the plate material 1 is being transferred, the corner portion 3 is subjected to compression processing at an angle θ ₁ = 30 ° with respect to the horizontal direction (see FIG. 1). Subsequently, in the second and third steps, the angle θ ₂ = 45 ° and the angle θ ₃ = 60, respectively.
The sharp corner 3 of the plate material 1 is formed into a shape substantially similar to a curved surface by performing the compression processing of ° (see FIG.
D).

Next, the edge roll processing apparatus of the present invention will be described.

As shown in FIGS. 2 and 3, the edge roll processing device 4 installed in the middle of the processing transfer path of the plate material 1 is two units which can be moved back and forth in a direction orthogonal to the feeding direction A of the plate material 1 by a ball screw. It has movable bases 5 and 5. The movable tables 5 and 5 are provided so as to face each other with a transfer path interposed therebetween, and the motor M
By rotating the screw shaft 6 by means of, it becomes possible to move along the guide shaft G in the directions of approaching and separating from each other.

A bar 7 and a frame 8 are respectively arranged on the upper portions of the movable tables 5 and 5, and the frames 8 and 8 each have a support frame 9 attached to the ends thereof, respectively, a left and a right three, respectively. The hydraulic cylinders 10 are arranged.

On each of the support frames 9, a pair of first rolls 13a and 13b, second rolls 14a and 14b, and third rolls 15a and 15b, which are rotatably supported by a bearing 11 and a rotary shaft 12, are provided. Each set of rolls can be moved toward and away from each other by each hydraulic cylinder.

Each of the rolls 13a has a substantially V-shaped outer peripheral surface which is even vertically in the horizontal direction, and a pair of two facing each other has a V-shaped angle of 60 ° between the first rolls 13a and 13b.
The second rolls 14a and 14b are 90 °, and the third roll 15
a and 15b are different from each other at 120 °. Further, a guide roller 18 is rotatably arranged by a bearing 16 and a rotating shaft 17 between each set of the first and second rolls and the second and third rolls. In the figure, 19 is a material support base.

In the edge roll processing apparatus 4 configured as described above, the plate material 1 is unwound from the coil and sent in the processing transfer path in the direction of arrow A. The plate 1 is once sent to the end of the edge processing roll device 4 and stopped, and in this state, the motor M is rotated to bring the moving bases 5 and 5 closer until the guide roller 18 comes into contact with the plate 1. The positions of 5 and 5 are adjusted appropriately.

After that, each hydraulic cylinder 10 is operated and each set of rolls 13a sandwiches the plate member 1. After finishing the above preparation, the feeding of the plate material 1 is restarted and the processing is started.

Both side ends of the plate material 1 sent on the material support base 19 have bars 7 and 7 even if the vertical positions thereof are slightly changed.
The first rolls 13a, 1 of the plate material 1 are not lowered.
When passing between 3b, the upper and lower corners of the end faces on both sides are each rolled at an angle of 30 ° in the horizontal direction.

Subsequently, the plate material 1 moves while the displacement in the width direction is corrected by the guide roller 18, and the second roll 1
4a and 14b, and when passing between the third rolls 15a and 15b, they are sequentially rolled by 45 ° and 60 ° so that the upper and lower corner portions of both side surfaces are uniformly crushed. In order to set the position of the movable table, the first fed portion of the plate material is cut, and the zero point is set at the time of cutting in the next process.

By the way, in the method and apparatus of the present invention, the angle and order of processing are not limited to those in the embodiment, and can be changed appropriately, and the processing may be performed in four or more steps, but usually 3 At the stage, the harmful corners are eliminated and the purpose can be achieved.

[0024]

According to the present invention, since it has the above-mentioned structure, the following effects can be obtained.

It is possible to compress the corners of the plate material at a constant angle regardless of the plate thickness, and it is not necessary to replace the tool even if the plate thickness of the material changes, and the productivity is greatly improved.

Since the movement of the surplus can be controlled by starting the processing from a given surface side of the material at a gentle angle and gradually increasing the angle, the quality of the product is also improved.

[Brief description of drawings]

FIG. 1 shows steps of an edge roll processing method of the present invention,
(A) is a state before processing, (B) is a first stage, (C) is a second stage, and (D) is a third stage.

FIG. 2 is a plan view of an edge roll processing device.

FIG. 3 is a partially cutaway side view of an edge roll processing apparatus.

FIG. 4 is an explanatory diagram of a conventional edge processing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate material 2 Slit surface 3 Corner part 4 Edge roll processing device 5 Moving stand 6 Screw shaft 7 Bar 8 Frame 9 Support frame 10 Hydraulic cylinder 11, 16 Bearing 12, 17 Rotating shaft 13a, 13b 1st roll 14a, 14b 2nd roll 15a, 15b Third roll 18 Guide roller 19 Material support stand M Motor G Guide shaft

Claims (2)

[Claims] 1. A method of edge-rolling a metal plate material, which comprises stepwise performing flat compression processing at different angles on upper and lower corners of both end surfaces of the metal plate material while transferring the metal plate material. 2. A plurality of pairs of V-shaped rolls facing each other in the horizontal direction with a metal plate material transfer path sandwiched therebetween are arranged in parallel, and a pressure mechanism is provided for each of the rolls. V
An edge roll processing device for metal plate material, characterized in that the angle of the mold is different for each set.