JP3085001B2 - Deburring method for rods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing burrs generated when a steel pipe, a round bar, a mold steel or the like is cut in a cross-sectional direction with a saw or a rotary grindstone.

[0002]

2. Description of the Related Art During a manufacturing process, a bar-shaped body such as a steel pipe, a round bar, a mold steel or the like, which is manufactured by continuous rolling, is often cut in a cross-sectional direction during a manufacturing process, for example, for heat treatment. Burrs generated by this cutting may be bent and removed manually to prevent problems such as transportation to the next process.
It has been removed by polishing or the like. For example, as a method of removing burrs by polishing, Japanese Patent Application Laid-Open No. 02-172662 describes a technique of fixing a plurality of steel pipes, contacting a brush, and polishing and removing burrs generated at the ends of the steel pipes. I have.

[0003]

However, the use of the deburring apparatus described in Japanese Patent Application Laid-Open No. 02-172662 has the following problems. It takes time to fix the steel pipe and contact the deburring device to remove burrs. The equipment becomes large-scale, and equipment costs and operating costs tend to increase. On the other hand, for removal of burrs, which is a problem in transportation during the production of steel pipes, for example, complete deburring as shown in the above technology is not required, but rather quickness is often required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a simple apparatus and a method for quickly removing burrs at the end of a rod without stopping the transportation of the rod. The purpose is to provide a possible deburring method.

[0005] For the above purpose, after the rod-shaped body is cut in the cross-sectional direction, burrs generated downward at the end of the rod-shaped body due to the cutting are first moved upstream while moving the rod-shaped body in the longitudinal direction.
Of Russia - bent toward the horizontal direction by Le, then, the rod-shaped
Deburring roll set slightly lower than the lower part of the body below
This is achieved by the method of removing the burrs of the rod-like body by bending the burrs.

[0006]

According to the present invention, the burr generated by cutting at the end of the rod is bent horizontally by a roll while moving the rod in the longitudinal direction, and then bent first by another roll. By bending in the direction opposite to the direction, the bending portion is repeatedly bent at the base of the burr, cracks are generated and grown, and the burr is separated from the rod. The first-stage burr folding roll may be a roll having a normal smooth surface, and can also serve as a transport roll. When the second-stage deburring is performed by a roll, for example, a roll having an uneven surface is set so that its peripheral speed is faster than the transport speed in the same direction as the first-stage deburring roll. In addition, the bent burrs can be reliably caught by the protrusions, and can be bent in a direction opposite to the bending direction to cut the burrs.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for deburring a steel pipe according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a view showing a state of burrs generated at the cut end of the steel pipe. 1 is a steel pipe, 3 is a burr folding roll, and in this case also serves as a transport roll.
Reference numeral 5 denotes a burr, which is bent by the burr folding roll 3 in a horizontal direction from a downward direction as shown by a solid line. FIG. 1 is a plan view showing an embodiment of the apparatus used in the method of the present invention. In the figure, 1 is a steel pipe, 2 is a cutting device, 3 is a burr folding roll, and 4 is a deburring roll.

In the method of the present invention, the steel pipe 1 is cut in the cross-sectional direction by moving the cutting device 2 by rotating the rotary blade 2a in the direction of the thick arrow. Burr 5 is generated in the cut steel pipe 1 downward. Thereafter, the burr folding roll 3 which is also a transport roll is driven to rotate by the motor 6, and the steel pipe 1 is transported in the longitudinal direction indicated by the thick arrow. Here, as shown in FIG. 2, the burrs 5 generated by the cutting are bent in the horizontal direction.

The deburring roll 4 having the convex portion 7 installed after the burr folding roll 3 rotates in the same direction as the transport roll, and the peripheral speed of the head of the convex portion 7 is the transport speed of the steel pipe 1. Set slightly faster than the speed. For this reason, the burr 5 can be hooked on the projection 7 and the burr 5 can be bent in the opposite direction and cut. The head of the convex portion 7 of the deburring roll 4 is set to be about 1 mm lower than the lower portion of the steel pipe 1 being conveyed in the longitudinal direction. Even when the burr 5 is bent horizontally,
Its end is lower than the lower part of the steel pipe 1 by 1 mm or more, and the deburring roll 4 can catch the burr 5 without touching the steel pipe 1. A plurality of deburring rolls 4 can be arranged. Here, three are arranged. In addition, the burr 5 can be reversely rotated if necessary, and the burr 5 can be reliably cut by repeated bending.

Incidentally, a combination of the burr folding roll 3 and the burr removing roll 4 may be further provided. The steel pipe 1 from which the burr 5 has been cut is transported to the next step by the transport roll 9. The diameter of the deburring roll 4 is 200 mm, the width of the head of the projection 7 is 20 mm, the number of the projections 16 is 16, and the height of the projection 7 is 20 mm. Of course, these specifications are not limited, and the shape of the convex portion may be triangular like a saw tooth, or may be a brush.

FIG. 3 is a diagram showing a main part of another embodiment of the apparatus used in the method of the present invention. In the drawing, reference numeral 8 denotes a spring mechanism. Here, the cutting device is the same as in FIG. 1 and is omitted. Steel pipe 1 having burrs 5 at ends shown by two-dot chain lines
Roll 3, which transports the fins in the longitudinal direction, a deburring roll 4 having a convex portion 7 provided on the surface thereof after the burr folding roll 3, and a motor 6 thereof. 8 are provided. 11 is a flexible joint. In this case, the deburring roll 4 normally rotates at a peripheral speed equal to the transport speed while being in contact with the steel pipe 1 by a spring, but rotates at a peripheral speed higher than the transport speed when not touching the steel pipe 1. . The rotation direction is the same as that of the transport roll. The rotation speed becomes equal to the conveyance speed about 0.1 second after the moment when the front end of the steel pipe 1 contacts the deburring roll 4, and then when the rear end of the steel pipe 1 is applied to the deburring roll 4, And maintain this speed until the next burr 5 at the front end of the steel pipe 1 is reached.

The apparatus shown in FIGS.
One or several to 22 steel pipes having a diameter of 4.3 mm were arranged side by side and cut to a length of 4 to 14 m, and then the generated burrs were removed by the method of the present invention. Conveying speed of the steel pipe is 2.5 m / s, deburring Hollow case of the method of FIGS. 2 and 3 - the rotational speed of the Le is 300 rpm, Russia
-When the paper is rotated in the reverse direction and transported in the reverse direction, the transport speed is 1 m
/ S. The burrs were completely removed by any of the methods.

[0013]

According to the present invention, the burr generated at the cut end can be quickly removed without stopping the rod-like body by a relatively simple device.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment used in the present invention.

FIG. 2 is a view showing a state of burrs at a cut end of a rod-shaped body according to the present invention.

FIG. 3 is a diagram showing a main part of another embodiment used in the present invention.

[Explanation of symbols] 1 steel pipe 2 cutting device 2a rotary blade 3 burr bending roll 4 deburring roll 5 burr 6 motor 7 concave / convex portion 8 spring mechanism 9 transport roll 10 bearing 11 flexible joint

Claims (1)

(57) [Claims] After the rod is cut in the cross-sectional direction, burrs generated downward at the end of the rod by the cutting are first removed by an upstream roll while moving the rod in the longitudinal direction. Fold it horizontally and then from the bottom of the bar
A deburring method for a rod-shaped body, wherein the burr is removed by being bent downward by a deburring roll provided slightly below .