JPH0417318Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a device for removing scale attached to the edges of coils for manufacturing ERW steel pipes, and continuously and automatically polishes the front and back edges while the coil is moving. The present invention relates to a coil edge scale removal device.

Prior Art and Its Problems In the production of electric resistance welded steel pipes, it is necessary to remove scale from the edges near the welds of coils in order to prevent oxides from entering the welds and the generation of penetrators.

Conventionally, there are three known methods for removing scale from the coil edges: pickling the coil, mechanical descaler, and edge shaver, but the pickling method removes surface scale by immersing the entire coil in a pickling bath. Because it is a method to
Mechanical descalers are a method of grinding the entire surface of the coil with a rotating grindstone, which increases equipment costs and has the drawback of uneven grinding at the coil edges. Edge shavers use a cutting tool to grind the coil edges. This method not only requires high equipment costs, but also has the disadvantages that it is difficult to adjust the cutting amount, and it is impossible to grind the edge surface.

Means for Solving the Problems This invention, as a means to solve the above-mentioned conventional problems, uses a flap foil made of sandpaper formed into a cylindrical shape as the abrasive material at the coil edge part.
Use this flap foil to cover the front and back edges of the coil.
This method uses a method of polishing the surface, and the gist is that a machine is installed on both sides of the coil so that it can move back and forth in the width direction of the coil, and a pair of upper and lower pieces that rotate vertically using cylinders are installed on both sides of the coil. horizontally install the arm of
The flap foil is attached to the tip of the arm so as to be in contact with the coil edge portion, and the flap foil is rotationally driven by a drive motor mounted on the arm.

In this invention, we used a method of polishing the four sides of the coil edge with flap foil because it is possible to remove scale to prevent the formation of penetrators from the surface area approximately 20 mm inward from the edge of the coil edge. What was discovered as a result of the inventor's tests is that when the flap wheel is rotated at high speed, the sandpaper spreads due to centrifugal force and can follow the vertical movement of the coil, so there is no need for a mechanical tracking device and there is no need for uneven sanding. This is because it has the advantage of not occurring. In addition, this flap foil manufactured by Yamakyori Kagaku Co., Ltd. is generally known, and since the tip of the flap (abrasive material part) gradually wears out and continues to generate new abrasive grain surfaces, there is no clogging. The finished surface roughness at the initial stage and cycle of the grinding work should be uniform, the flap with appropriate elasticity should be effective, and it should be highly compatible not only with flat surfaces but also with the undulations of the workpiece. It has the characteristics that it is easy to attach and detach from etc.

The main feature of this invention is that the above-mentioned flap foil is used to polish the surface of the edge part of the coil to remove scale attached to that part, and the equipment is small and there is no uneven grinding. We have proposed a device that can remove edge scale extremely effectively.

DISCLOSURE BASED ON DRAWINGS OF THE INVENTION FIG. 1 is a front view showing an example of the configuration of an apparatus of this invention.

In FIG. 1, 1 is a coil, 2 is a coil edge scale removing device of this invention, and 3 is a coil edge scale removing device.
are the machine bases, which are installed on both sides of the coil 1 so as to move back and forth in a direction perpendicular to the coil; 4 is a positioning cylinder that moves the machine back and forth; 5 is a cylinder for moving the machine base; It's a rail. 6,7
1 is a pair of upper and lower arms each supported on a machine base 3 by support shafts 8 and 9 so as to be able to pivot in the vertical direction.
Reference numerals 0 and 11 are flap wheels detachably attached to the tip of the arm, 12 and 13 are vertical cylinders that pivot the arm in the vertical direction, and 14 and 15 are flap wheel drive motors.

The machine stand 3 shown here is composed of two pillars, and between these pillars, a pair of arms 6 and 7, two upper and lower arms, are installed on the upper and lower sides of the coil 1. The lower arm 6 is supported by a vertical cylinder 12 installed on a base plate 16 protruding from the machine base, and the lower arm 7 is supported by a vertical cylinder 13 installed at the bottom of the machine base. Moreover, the flap foils 10 and 11 attached to the tips of each arm are connected to the drive motors 14 and 11 mounted on the respective arms 6 and 7.
5, it is rotatably driven via belts 17 and 18. Reference numeral 19 denotes a receiving roll that supports the coil 1 so that it does not escape downward when the flap foil presses the coil 1, and is provided as necessary.

Note that the movement mechanism of the machine base is not limited to the cylinder type, but may also be a system in which the screw shaft is rotated by a handle to move it back and forth, and the structure of the machine base itself and the mounting structure of the arm are also limited to those illustrated here. In short, any structure is sufficient as long as the edge portion of the coil 1 can be held between a pair of upper and lower flap foils.

Operation When removing scale on the edge of the coil 1 using the above device, first move the machine 3 to the coil 1 side using the positioning cylinder 4, and then the flap foils 10 and 11 at the tip of the arm are placed on the surface of the edge of the coil. Position it by stopping it at a position where it can be held.
When the positioning is completed, the upper and lower arms 6 and 7 are rotated toward the edge of the coil 1 by the respective vertical cylinders 12 and 13, and are driven to rotate at high speed by the drive motors 14 and 15. The upper and lower two flap foils 10 and 11 are pressed against the surface of the coil edge portion and polished.

After polishing the coil, turn the vertical cylinder 1 again.
At steps 2 and 13, the arms 6 and 7 are moved away from the coil 1 and placed on standby. When the width of the coil 1 changes, the size is changed using the positioning cylinder 4.

Effects As mentioned above, this method uses a flap coil to polish the front and back sides of the edge of the coil, making it possible to simultaneously and automatically remove scale adhering to the edge to prevent the formation of penetrators. Moreover, since a flap foil made of cylindrical sandpaper is used as the polishing material for the edge portion, even if the coil moves up and down, it can be followed and uneven polishing will not occur. In addition, this device can move forward and backward relative to the coil, and has a structure in which the upper and lower flap foils can move toward and away from the coil, so it can respond to changes in coil width, and when the coil is stopped, It has the advantage of being able to evacuate the flap foil to prevent contact with the coil in the event of a problem, and has the advantage of being structurally simple, resulting in lower equipment costs compared to conventional pickling methods, mechanical descalers, edge shavers, etc. be. In addition, this device can be installed at any position during breakdown after the shear welder on an ERW steel pipe manufacturing line, and can be used to continuously operate the four edges of the front and back edges while the coil is moving.
It is highly practical as it can be used to polish surfaces.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of the configuration of the device of this invention. 1... Coil, 2... Coil edge scale removal device, 3... Machine stand, 4... Positioning cylinder, 5... Movement rail, 6, 7... Arm,
8, 9... Support shaft, 10, 11... Flap foil, 12, 13... Vertical cylinder, 14, 15
...Flap wheel drive motor.

Claims (1)

[Scope of utility model registration request] This is a device for removing scale attached to the edges of coils for manufacturing ERW steel pipes, and is equipped with a machine base installed on both sides of the coil so as to be movable back and forth in the width direction of the coil.
A pair of upper and lower arms that rotate vertically in a cylinder are installed horizontally, a flap foil made of sandpaper formed into a cylindrical shape is attached to the tip of the arm so as to contact the coil edge part, and a drive motor is mounted on the arm. A coil edge scale removal device characterized by having a mechanism for rotationally driving a flap foil.