JP2003181749A - Device for grinding end portion of round bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for grinding the end portion of a round bar which can be used to promote the reduction of processing time, the space-saving of an apparatus and the lowering of an apparatus cost, by carrying out grinding processing for the smoothness of the end face of the round bar and the grinding processing for the deburring of an edge portion. <P>SOLUTION: The device for grinding the end face of the round bar is provided with a columnar grinder 1 which can be used to grind the edge portion of the round bar X, a strip grinder 2 made running axially along the outer peripheral grinding face of this columnar grinder 1 and can be used to grind the end face of the round bar X, and a mechanism 3 for driving the round bar used to pushingly press the end face of the round bar X to the grinding face of this strip grinder 2 and to turn the round bar X on its axis, while pushingly pressing the edge portion of the round bar X to the outer peripheral grinding face of the columnar grinder 1. It is preferable for the mechanism 3 for driving the round bar to be provided with a tilted roller 9 capable of being pushingly pressed to the outer peripheral face of the round bar X. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for grinding an end portion of a round bar, and more particularly, it improves the properties of an end surface and an edge portion of a round bar steel or the like which is hot rolled and cut into a predetermined length. The present invention relates to an end grinding device.

[0002]

2. Description of the Related Art Briefly explaining a general method for manufacturing a round bar steel, first, a billet (rolling material) is formed by a pretreatment process such as refining, ingot making, slabbing, and hot rolling for this billet. Round bar-shaped long bar steel is formed. By cutting this long strip into a plurality of strips with a flying shear, cooling it with a cooling floor, and finally cutting the strip after cooling with a cold shear to a standard length according to the order received,
A round bar steel having a predetermined size to be a product is manufactured.

As described above, since the end surface of the round steel bar that has been cut by the cold shear may have irregularities and burrs may occur at the edge portion, the round steel bar may be manually cut using a grinder or the like. The end is ground, or
Post-processing is required to grind the end portion of the round steel bar by using the end surface grinding device disclosed in Japanese Patent No. 277893 and the like and the deburring device for the edge part disclosed in Japanese Patent Laid-Open No. 8-229788.

[0004]

The above-mentioned conventional manual end-grinding process of a round bar steel using a grinder or the like is inefficient and extremely poor in productivity because it is performed off-line. There is an inconvenience that the end properties are not constant.

On the other hand, the edge grinding processing of the round steel bar using the above-mentioned conventional end surface grinding apparatus and edge deburring apparatus can be done online, and the above-mentioned decrease in productivity is reduced. Since the end face smoothing grinding process and the edge deburring process are performed by different devices, there is a certain limit in shortening the processing time. In addition, a wide space is required to separately arrange the end surface grinding device and the edge deburring device, and the auxiliary equipment required for the grinding device such as a dust collector is also required for each device. There is an inconvenience that the cost increases.

The present invention has been made in view of these inconveniences, and can simultaneously perform the smoothing grinding process of the end surface of the round bar and the deburring process of the edge portion, thereby shortening the processing time, saving the space of equipment, and It is an object of the present invention to provide a round bar end grinding device that can promote reduction in equipment cost.

[0007]

DISCLOSURE OF THE INVENTION The invention made to solve the above-mentioned problems is to provide a cylindrical grinder capable of grinding the edge portion of a round bar, and to run in the axial direction along the outer peripheral grinding surface of the cylindrical grinder. Then, the strip grinder capable of grinding the end face of the round bar and the end face of the round bar is pressed against the grinding surface of this strip grinder, and the edge part of the round bar is pressed against the outer peripheral grinding surface of the cylindrical grinder, It is an end part grinding device for a round bar provided with a round bar drive mechanism for rotating the bar around its axis (rotation about an axis).

According to the end-grinding device for a round bar, a cylindrical grinder for edge-grinding processing and a strip-shaped grinder for axial grinding along an outer peripheral grinding surface of the cylindrical grinder. Because it has
By pressing the edge part of the round bar to the outer peripheral grinding surface of the cylindrical grinder and the end surface of the round bar to the grinding surface of the strip grinder by the round bar drive mechanism, the round bar rotates to rotate all edge parts of the round bar. The deburring grinding process and the smoothing grinding process for the entire end surface of the round bar can be simultaneously performed. Therefore, in the manufacturing process of the round bar by hot rolling, the end treatment after cutting can be made online, and further, the reduction of the treatment time by the simultaneous treatment of the deburring treatment and the smoothing treatment can be promoted. . Further, it is not necessary to separately provide an end surface grinding device and an edge deburring device used for the above-described conventional end processing of a round bar, and one end grinding device for the round bar is installed. Since both of the above processes can be performed, it is possible to promote space saving of equipment and reduction of equipment cost.

The round rod driving mechanism may include an inclined roller that can be pressed against the outer peripheral surface of the round rod. By pressing the inclined roller against the outer peripheral surface of the round bar and rotating it,
It is possible to rotate the end of the round bar while pressing the strip grinder and the cylindrical grinder. According to the means, the action required for the round rod drive mechanism can be achieved with relatively simple equipment.

Here, the "cylindrical grinder" refers to a grinding wheel having a cylindrical grinding surface in which grinding wheels are laminated on the outer peripheral surface of a cylindrical body. This "cylinder" is a concept including a cylinder. The “strip-shaped grinder” means one in which a grindstone is laminated on one surface of a strip-shaped base material, and for example, a paper grinder corresponds to this. What is "tilted roller"?
This means a so-called skew roller, and specifically, a roller whose rotation axis is inclined at a predetermined angle from the direction perpendicular to the longitudinal direction of the round bar.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a schematic plan view showing a round bar end grinding device according to an embodiment of the present invention, and FIG. 2 is a schematic end view of the round bar end grinding device of FIG. 1 (cutting line; A-
A).

The end-grinding device for a round bar shown in FIGS. 1 and 2 comprises a cylindrical grinder 1 for grinding the edge of the round bar X, a strip-shaped grinder 2 for grinding the end face of the round bar X, and this cylindrical grinder. 1 and a strip-shaped grinder 2 are provided with a round bar driving mechanism 3 that rotates while rotating and abutting and pressing the edge portion and the end surface of the round bar.

The cylindrical grinder 1 is a cylindrical grinding wheel and has grinding wheels laminated on its outer peripheral surface. This cylindrical grinder 1 is installed with its central axis horizontal, is connected to a drive motor or the like (not shown), and is rotatable about the central axis. The grinding wheel is not particularly limited and may be appropriately selected from those suitable for grinding according to the material of the round bar to be ground. Specifically, vitrified grinding wheel, silicate grinding wheel, resinoid grinding wheel, etc. are used. . By pressing the edge portion of the round bar X against the outer peripheral grinding surface of the rotating cylindrical grinder 1, deburring or chamfering of the edge portion is possible.

The belt-shaped grinder 2 is a belt-shaped grinding tool in which a grinding wheel is laminated on the outer surface of a base material and has a predetermined strength and flexibility. A cloth material, a paper material, a synthetic resin, or the like is used as the base material, and a grinding wheel similar to the grinding wheel of the cylindrical grinder 1 is used as the grinding wheel.

The belt-shaped grinder 2 is horizontally stretched around a pair of fixed rollers 4 and 5, a driving roller 6 and a tension roller 7, which are installed with their rotation axes vertical.
The tension roller 7 is configured to spring outward by a coil spring or the like, and stretches the band grinder 2 with a predetermined tension. The drive roller 6 is connected to a drive motor or the like (not shown), and drives the belt-shaped grinder 2 in the longitudinal direction thereof.

Between the pair of fixed rollers 4 and 5, the strip-shaped grinder 2 and the cylindrical grinder 2 are arranged so that the lower edge of the strip-shaped grinder 2 is oriented along the outer peripheral surface of the cylindrical grinder 1 near an elevation angle of 45 ° and in the axial direction. 1 and 1 are arranged close to each other. Therefore, the grinding surface of the vertical strip grinder 2 and the cylindrical grinder 1
The included angle with the ground surface is an obtuse angle.

A plate-shaped stopper 8 is arranged between the pair of fixed rollers 4 and 5 along the inner side surface of the belt-shaped grinder 2, and the stopper 8 supports the inner side surface of the belt-shaped grinder 2. There is. In this way, the inner surface is supported by the stopper 8, and the end surface of the round bar X is pressed against the grinding surface of the strip grinder 2 running in the longitudinal direction, so that the end surface of the round bar X is ground smoothly. Can be removed.

In order to prevent the rotation of the cylindrical grinder 1 and the traveling of the strip grinder 2 from interfering with each other, a clearance of a predetermined width is required between the outer peripheral grinding surface of the cylindrical grinder 1 and the lower edge of the strip grinder 2. . Therefore, the entire end surface of the round bar X cannot be covered with the grinding surface of the strip grinder 2 in a state where the edge portion of the round bar X is in contact with the outer peripheral grinding surface of the cylindrical grinder 1, but the round bar driving mechanism 3 Since the round bar X is rotated by the above method, if the clearance width between the cylindrical grinder 1 and the strip grinder 2 is set to be equal to or less than the radius of the round bar X, the entire end surface of the round bar X can be ground. It should be noted that, as the clearance width, from the viewpoint of promoting the smoothness of the end surface of the round bar X, the round bar X
5% to 80% of the radius is preferable, and 10% to 6
0% or less is particularly preferable.

The round bar driving mechanism 3 is composed of an inclined roller 9 attached to a feed table (not shown) that conveys the round bar X to the end grinding device. This feed table is equipped with a dock chain and the like that is hung around it, and supports a plurality of round bars X that have been cut by a cold shear horizontally and in parallel, and in the direction perpendicular to the longitudinal direction of the round bars X. Transport, so-called lateral feed. The feed table conveys the round bar X in a state perpendicular to the axial direction of the cylindrical grinder 1 (that is, the longitudinal direction of the belt-shaped grinder 2 between the pair of fixed rollers 4 and 5), and the edge portion of the round bar X and The end faces are conveyed such that they are in contact with the outer peripheral grinding surface of the cylindrical grinder 1 and the grinding surface of the strip grinder 2, respectively.

The tilted roller 9 has a round bar X whose end is in contact with the cylindrical grinder 1 and the belt-shaped grinder 2.
It is configured to give a frictional resistance to the outer peripheral surface of, and is rotationally driven by a built-in motor or the like (not shown). The rotating shaft of the inclined roller 9 is inclined at a predetermined angle with reference to the axial direction of the round bar X and the vertical direction. Therefore, the inclined roller 9 is brought into contact with the outer peripheral surface of the round bar X and rotationally driven in the direction of the strip grinder 2 (direction at the contact point), so that the end of the round bar X is pressed against the grinding surface of the strip grinder 2. In addition, the round bar X can be rotated.

According to the end grinding device having the above structure, the round bar X
The round bar X is sequentially conveyed by the feed table so that the end surface of the contact member comes into contact with the grinding surface of the belt-shaped grinder 2 and the edge portion contacts the outer peripheral grinding surface of the cylindrical grinder 1, and the belt-shaped grinder 2 and the cylindrical grinder 1 are rotated. In this state, the inclined roller 9 is pressed against the round bar X to rotate, whereby the end surface and the edge portion of the round bar X are pressed against the grinding surface of the strip grinder 2 and the outer peripheral grinding surface of the cylindrical grinder 1, respectively. The smoothing grinding process of the end surface of the round bar X and the deburring grinding process of the edge portion can be simultaneously performed. As described above, since the end surface grinding and the deburring grinding can be simultaneously performed, the processing time can be shortened and the end part grinding processing step can be performed online.

Further, according to the end grinding device, the round bar X
The strip grinder 2 is used for smoothing and grinding the end face of
Since the cylindrical grinder 1 is used for deburring and grinding the edge portion, the length of the strip grinder 2 is adjusted so that the end surface grinding processing device portion and the edge portion grinding processing device portion do not interfere with each other. Further, it can be compactly integrated, and as a result, the smoothing grinding processing of the end surface and the deburring grinding processing of the edge portion can be simultaneously performed, and the space saving of the apparatus can be promoted.

The round bar end grinding device of the present invention is not limited to the above-described embodiment. For example, the round bar driving mechanism is not limited to the inclined roller 9, and the grinding surface of the belt-shaped grinder 2 is not limited. Other means can be used as long as the mechanism can press the end surface of the round bar X and rotate the round bar while pressing the edge portion of the round bar X against the outer peripheral grinding surface of the cylindrical grinder 1.

[0024]

As described above, according to the round bar end grinding apparatus of the present invention, it is possible to simultaneously perform the deburring grinding process on the edge part of the round bar and the smoothing grinding process on the end face. Therefore, in the manufacturing process of the round bar by hot rolling, the end processing after cutting can be made online, and the processing time can be shortened. Further, it is possible to promote the space saving of the equipment and the reduction of the equipment cost as compared with the conventional end grinding processing of the round bar in which the end surface grinding device and the edge deburring device are separately provided.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a round bar end grinding apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic end view (cutting line; AA) of the end grinding device for a round bar in FIG.

[Explanation of symbols]

1 ... Cylindrical grinder 2 ... band grinder 3 ... Round bar drive mechanism 4 ... Fixed roller 5: Fixed roller 6 ... Drive roller 7 ... Tension roller 8 ... Stopper 9 ... Inclined roller

Claims (2)

[Claims] 1. A cylindrical grinder capable of grinding the edge portion of a round bar, and a strip grinder capable of axially traveling along the outer peripheral grinding surface of the cylindrical grinder to grind the end face of the round bar, and this strip shape. Press the end surface of the round bar against the grinding surface of the grinder,
Also, a round bar end grinding device comprising a round bar driving mechanism for rotating the round bar while pressing the edge part of the round bar against the outer peripheral grinding surface of the cylindrical grinder. 2. The round-bar end grinding device according to claim 1, wherein the round-bar driving mechanism includes an inclined roller that can be pressed against the outer peripheral surface of the round bar.