JP2001157953A - Round bar end face grinding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a round bar end face grinding apparatus not manually but automatically to implement the end face grinding work in a finishing line of medium to small size round steel bar sheared in a hot condition without impeding any productivity of the line. SOLUTION: The round steel bar end face grinding apparatus implements the end face grinding work making use of the rotation and propulsion to a work to be straightened during the straightening using a mound steel bar straightening machine with straightening rolls disposed in the vertical direction and having the inclination in the carrying direction of the work in the finishing line of the round steel bar sheared in the hot condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically polishing an end face of a small and medium-sized round steel bar which has been sheared in a hot steel state, without impeding productivity of the line and without manpower. The present invention relates to an apparatus for polishing an end face of a round steel bar.

[0002]

2. Description of the Related Art Conventionally, small and medium sized round bars are sheared in a hot steel state to a predetermined length after rolling. However, a bad cut surface may be generated depending on various conditions such as steel type characteristics, cutting temperature, and shear blade state. These cut round bars are once bound and stored. After that, when it becomes cold steel, the refinement line (unbundling → shot blast → straightening →
Work is performed by non-destructive inspection → ...). In this case, if the cut surface is bad, take it off-line from the refining line and grind it manually with a hand grinder. In fact, it is necessary to introduce a line facility for polishing the end face (or press the material).

[0003]

As described above, conventional edge polishing requires manual polishing using a hand grinder and line equipment dedicated to edge polishing.
The productivity in the refining line is hindered, and the cost of human resources and other environmental problems increases due to the reliance on human labor. On the other hand, on the end surface of the round bar, a color-specific label is attached as a steel type identification to make the final product.However, since the end surface that has been sheared in a warm state has irregularities, only the adhesive strength of the color-specific label is sufficient. It is easy to fall off, and the grinder needs to be reworked and varnished in the finishing line.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The gist of the present invention is to provide a refining line for a round steel bar which has been sheared in a hot steel state. The end face is polished by using a round bar straightening machine having a straightening roll having a straightening roll having a tilt with respect to the transport direction of the straightened material, using the rotation of the straightened material at the time of straightening by the round bar straightening machine and the propulsive force. An end surface polishing apparatus for a round steel bar, which performs an operation.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of a straightening machine exit side of a round steel bar according to the present invention. As shown in FIG. 1, the material to be corrected 1 is fed into a straightening machine entrance side transport roller 10 one by one from a straightening machine front table 9. The loaded material 1 is straightened by the straightening rolls 2a, 2 rotated by the electric motors 8a, 8b.
It is inserted between b and corrected. The straightening rolls 2a and 2b are arranged vertically and have an inclination with respect to the conveying direction of the straightened material 1, so that the inserted straightened material 1 rotates and passes between the straightening rolls so as to be pushed out. , And is sent to the straightening device delivery side transport roller 11.

The grindstone 3 is set on a stopper 4 which can move in parallel with the delivery roller 11 of the straightening machine. For example,
When the stopper 4 having the moving rail 6 as shown in FIG. 1 is released from the pushing force of the material 1 to be corrected, it needs to return to the origin, and therefore a counterweight 7 is required.
Further, a method of making it expandable and contractable by a cylinder (not shown) is also possible. In this way, the material to be corrected 1
Is supplied to the delivery roller 11 on the exit side of the straightening machine while being given rotation and propulsion by the straightening rolls 2a and 2b. Polishing is also performed.

After completion of the straightening and polishing of the end face, the straightening machine is paid out to the rear surface table 5, and the stopper 4 returns to the original origin position and waits for the next material. In this way, the end face is polished using the rotation and propulsion force at the time of straightening the round bar, so that the movement of the round bar at the time of straightening work can be used, and more efficient end face processing can be performed, and the finishing line work can be performed. It is possible to reduce the load, prevent the color-specific labels from falling off, and improve the quality.

[0008]

As described above, according to the present invention, the end face of a round steel bar can be polished at a low cost without impairing the productivity of a refining line, and the labels of different colors can be prevented from falling off. And an extremely excellent effect of improving the quality.

[Brief description of the drawings]

FIG. 1 is a schematic view of a straightening machine exit side of a round steel bar according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 To-be-corrected material 2a, 2b Straightening roll 3 Grinding stone 4 Stopper 5 Straightening machine rear table 6 Moving rail 7 Counterweight 8a, 8b Electric motor 9 Straightening machine front table 10 Straightening machine entrance side conveyance roller 11 Straightening machine exit side conveyance roller

Claims (1)

[Claims] 1. A round bar straightening machine having a straightening roll having a straightening roll which is arranged vertically and is inclined with respect to a conveying direction of a material to be straightened in a refining line of a round bar which has been sheared and cut in a hot steel state. An end surface polishing apparatus for round bar steel, wherein the end surface is polished by using rotation and propulsion of a material to be corrected at the time of straightening by a steel bar straightening machine.