JP2006289568A - Brush-chamfering device for steel bar/steel pipe, and brush-chamfering method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brush-chamfering or a brush-burring device for a steel bar/steel pipe, and to provide a brush-chamfering or a brush-burring method. <P>SOLUTION: In operation of the brush-burring device for a steel bar/steel pipe transferred on a transfer line, the workpiece to be machined is non-rotativelly fixed, and a brush is rotated in a direction perpendicular to or in parallel with a longitudinal direction of the workpiece. According to the structure of the brush-burring device, the brush itself of the brush-chamfering device is made rotatable. Further if the workpiece is the steel pipe, the amount of eccentricity of the brush can be adjusted depending on an external diameter and an internal diameter of the steel pipe. The brush-chamfering method is also disclosed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a brush chamfering or brush deburring device for a steel bar / steel pipe and a method thereof.

  Conventionally, an apparatus for brushing an end portion of a long material is related to an end surface of a deformed material transferred on a conveying line as disclosed in, for example, Japanese Patent Application Laid-Open No. 52-12768 (Patent Document 1). In the brushing device to be combined, a brushing device in which three cylindrical brushes are arranged in a plane perpendicular to the axis of the deformed material and the rotation axis of the cylindrical brush is displaced by 120 ° is provided. Proposed. However, in the case of Patent Document 1, since chamfering is performed by providing a plurality of wire-brushes, there is a problem that the apparatus becomes complicated and a lot of space is required.

  Moreover, as disclosed in Japanese Patent Laid-Open No. 6-31605 (Patent Document 2), the steel strip edge is cleaned online by a brush roll having a rotation axis parallel to the steel strip traveling direction before the welding process. And shape control continuously. That is, the removal of the burr | flash which causes a welding defect and the rising allowance of the welding part inner surface protrusion are removed beforehand. However, this patent document 2 is intended for a steel strip edge, and is a device for forming a shape of a steel strip edge by brushing that can improve the reliability of the welded steel pipe welded portion and suppress the inner surface protrusion of the welded portion.

  Further, as disclosed in Japanese Patent Laid-Open No. 7-164268 (Patent Document 3), a tube fitting rotation in which a large-diameter portion and a small-diameter guide portion are continuously formed and a chamfering blade is provided at a boundary portion between them. A polishing brush that is installed and supported on the outer side of the proximal end of the shaft body and the small-diameter guide portion and rotates integrally with the rotary shaft body for pipe fitting, and a rotary shaft for pipe fitting that is installed and supported on the outer side of the distal end side of the small-diameter guide portion. It consists of a polishing brush that rotates integrally with the body, and a cutting blade body that is installed and supported on the outer side of the distal end of the small-diameter guide part, and that rotates together with the same rotating shaft body for pipe fitting. In addition, there has been proposed a coating end processing machine for a heat insulating cladding tube that is manually gripped and pushed in, and the coating is removed, the peripheral surface is polished, and the rim of the mouth is trimmed. However, in the case of Patent Document 3, it relates to a coating terminal processing machine for a heat insulating coated tube that performs coating removal, peripheral surface polishing, and edge trimming, and since the rotation direction of the wire brush is one direction, the material to be processed It is difficult to uniformly chamfer the entire circumference.

  Furthermore, FIG. 4 is a schematic explanatory diagram of a conventional brush chamfering apparatus for steel bars and steel pipes. 4A is a top cross-sectional view, and FIG. 4B is a cross-sectional view. As shown in this figure, the materials to be treated 2 are arranged on a table (not shown), and the materials to be treated 2 polished by the dock chain 3 are conveyed perpendicularly to the materials to be treated 2. Roll material 2. The workpiece 2 is conveyed while rolling, but is pressed against the wire brush 1 that rotates at high speed by the aligning roller 4, so that the end surface of the workpiece 2 is chamfered. Reference numeral 5 denotes a wire brush rotating motor.

  FIG. 5 is a schematic explanatory view of another conventional steel bar chamfering apparatus for steel bars and steel pipes. As shown in this figure, the workpieces 2 are arranged on a table (not shown), the workpieces 2 are fixed by a material fixing chuck 6, and the wire brush 1 is moved while rotating to perform chamfering. It constitutes a structure.

Japanese Patent Laid-Open No. 52-12768 JP-A-6-31605 Japanese Patent Laid-Open No. 7-164268

  In the conventional steel bar / steel pipe brush chamfering apparatus shown in FIG. 3 described above, when the end of the steel bar or steel pipe of the material to be processed is bent, the end shape is poor (flat) or the end is slanted. The shape of the end, such as cutting, becomes worse. Thus, for example, in the case of bending at the end portion, even if the upper portion where the bending has occurred can be chamfered with the brush, chamfering that hits the portion opposite to the upper bending cannot be sufficiently performed. On the other hand, in the case of an edge shape defect (flat), the major axis side of the flat can be chamfered, but the minor axis side is not sufficiently chamfered.

  Furthermore, when the end is obliquely cut, there is a problem that the major axis side of the flat can be chamfered but the opposite side is chamfered. Thus, when the shape of the edge part of a to-be-processed material is bad, since it does not hit a wire brush uniformly, chamfering cannot be performed uniformly on the whole circumference. In particular, when the material to be treated is a steel pipe, it is difficult to uniformly chamfer the inner surface. Therefore, it is necessary to adjust the position of the wire brush according to the diameter of the material to be processed.

On the other hand, in the other conventional steel bar / steel pipe chamfering device shown in FIG. 4, since it is not possible to press the wire brush if the material to be treated is fixed, adjustment of the chamfering amount can be performed by a timer or the like. However, this also causes problems such as insufficient chamfering and excessive chamfering.
The steel bar may be a cylindrical material, a hexagonal or more polygonal material, and may be a deformed steel bar having a shape close to these. Moreover, the thickness of the steel pipe is not particularly limited.

  In order to solve the above-mentioned problems, the inventors have intensively developed and as a result, by rotating the brush head, it is possible to apply the brush uniformly to the entire circumference, and the outside of the material to be processed By adjusting the amount of eccentricity of the brush according to the diameter and inner diameter, a uniform chamfering amount can be performed, and further, the chamfering can be performed in a short time cycle by rotating the brush itself, and the chamfering machine itself moves forward and backward. Further, the present invention provides a brush chamfering apparatus for steel bars and steel pipes and a method for adjusting the amount of chamfering by adjusting the chamfering execution time.

The gist of the invention is that
(1) In a brush chamfering apparatus for steel bars and steel pipes transferred on the conveying line, the material to be treated is fixed so as not to rotate, and the brush can be rotated perpendicularly and parallel to the longitudinal direction of the material to be treated. This is a brush chamfering device for steel bars and steel pipes.
(2) A brush chamfering apparatus for a steel bar / steel pipe, characterized in that the brush itself of the brush chamfering apparatus according to (1) can rotate.

(3) A brush chamfering apparatus for a steel bar / steel pipe, wherein the treatment material according to (1) or (2) above is a steel pipe, and the chamfering is performed uniformly over the entire circumference of the inner and outer surfaces.
(4) A brush chamfering device for a steel bar / steel pipe, wherein the treatment material according to (1) or (2) is a steel pipe, and the eccentric amount of the brush can be adjusted by an outer diameter and an inner diameter.

(5) In the brush chamfering method for steel bars and steel pipes transferred on the transport line, the brush is rotated in a direction perpendicular to and parallel to the longitudinal direction of the treatment material, and the chamfering machine itself is moved forward and backward, or the chamfering time is controlled. The present invention resides in a brush chamfering method for a steel bar / steel pipe, characterized in that the chamfering amount is adjusted so that the chamfering can be performed uniformly over the entire periphery of the end face of the processing material.

  As described above, according to the present invention, chamfering can be performed uniformly over the entire circumference of the end face of the round steel bar and the inner and outer surfaces of the steel pipe, and the chamfering can be performed in a short time cycle, and the chamfering amount can be adjusted. It is possible to achieve a very excellent effect.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic explanatory diagram of a brush chamfering apparatus for steel bars and steel pipes according to the present invention. FIG. 1A is a top sectional view, and FIG. 1B is a detailed view of the brush eccentric part. As shown in this figure, the material 2 to be processed is fixed by a material fixing chuck 7, the brush head 8 is rotated by using a brush head rotating motor 6, and further, the material 2 to be processed by using a wire brush rotating motor 5. This is an apparatus capable of chamfering the entire periphery of the end surface of the workpiece 2 by rotating the wire brush 1 with a rotation axis perpendicular to the axial direction.

  Furthermore, as shown in FIG. 1B, by decentering the wire brush 1, the force is not concentrated on the center portion of the end surface of the workpiece 2, and the force can be applied uniformly. The amount of eccentricity is variable and can be adjusted according to the diameter of the material 2 to be processed, so that it is not necessary to change the size of the wire brush 1 with the diameter of the material 2 to be processed, and the pause loss due to the size change is suppressed. Can do. Reference numeral 9 indicates the center of the material to be processed, and reference numeral 10 indicates a stroke. The optimum variable stroke varies depending on the diameter of the material to be treated, but is 40 to 70 mm, preferably 50 to 60 mm.

  FIG. 2 is a cross-sectional view of a brush chamfering device for steel bars and steel pipes according to the present invention. As shown in this figure, it is not necessary to move the workpiece 2 in the axial direction of the workpiece by the mechanism for moving the entire apparatus back and forth by the brush head forward / backward cylinder 11, so that the chamfering operation can be performed in a small space. It can be carried out.

  FIG. 3 is a diagram for defining a standard for giving an eccentric amount to the brush according to the present invention and a chamfering evaluation standard. FIG. 3 (a) defines a standard in three steps for providing an eccentricity amount. In the case of A, the measurement is performed at 9 mm and 10 mm. In the case of B, the measurement is performed at 12 mm and 13 mm. The chamfering situation when an eccentric amount of 18 mm was given was examined. FIG. 3B defines chamfering evaluation criteria. When the material 2 to be processed is a steel pipe, the quality is determined based on the length of the end surface 12.

Hereinafter, the present invention will be specifically described with reference to examples.
The end of the steel pipe cut by the grindstone was chamfered with the apparatus according to the present invention, and the chamfer cleanliness of the conventional brush chamfering method was compared. Table 1 shows the effect of chamfering time (polishing time) and chamfering situation on the inner and outer surfaces of the steel pipe. 1 to 8 are bearing steels (JIS symbol is SUJ2), the outer diameter is 26.5 mm, the wall thickness is 3.00 mm, and the entire circumference of the steel pipe is divided into eight equal parts, showing the chamfering status of each part. Is. No. Nos. 9 to 16 are stainless steel (JIS symbol is SUS304), which has an outer diameter of 20.0 mm and a wall thickness of 2.00 mm. Similarly to 1 to 8, the entire circumference of the steel pipe is divided into eight equal parts, and the chamfered state of each part is shown. The polishing conditions were as follows: brush width: 50 mm, brush diameter: 300 mm, rotation speed: 1750 rpm, wire diameter: 0.4 mm piano wire, eccentricity: 10 mm. As an evaluation standard at that time, the presence or absence of a chamfer was confirmed visually and by touch, and the portion was measured. As a result, x: a state where the brush was not hit and not chamfered, Δ: less than 0.5 mm, and ◯: 0.5 mm or more.

  As shown in Table 1, in the case where the chamfering time is as short as 3 seconds, a part of Δ is recognized, but it can be seen that good chamfering is performed by chamfering for 5 seconds and 10 seconds. On the other hand, in the case of the conventional method shown in FIG. 3, some of the brushes were not touched and not chamfered, and Δ were recognized. As can be seen from the above, according to the brush chamfering apparatus of the present invention, the chamfering time (polishing time) requires more than 3 seconds, and if chamfering at this time is performed, compared with the conventional method, It is possible to reliably chamfer the inner and outer surfaces of an excellent steel pipe, and to obtain a steel pipe having a uniform end surface.

  Table 2 targets SUJ2, outer diameter 26.5 mm, wall thickness 3.00 mm, and polishing conditions are brush width: 50 mm, brush diameter: 300 mm, rotation speed: 1750 rpm, wire diameter: 0.4 mm piano wire, polishing time : Performed in 5 seconds. Eccentric amount at that time: A = 10 mm, B = 12 mm, C = 13 mm, and 4 types of polishing time and brush pressing amount of 3 seconds, 3 seconds + 2 mm advance, 5 seconds, 5 seconds + 2 mm advance It was. The 3 seconds + 2 mm advance and the 5 seconds + 2 mm advance are cases where the 2 mm brush is further shifted to the end face side and compared with the processing by pressing the normal brush for 3 seconds and 5 seconds. As a result, as in Table 1, the entire circumference of the steel pipe was divided into eight equal parts, and the chamfered state of each part was partially in the case of the eccentric amount C = 13 mm, and only in the case of the polishing time of 3 seconds. A chamfering deficit of less than 0.5 mm was observed in the part.

  Table 3 targets SUS304, outer diameter 34.5 mm, wall thickness 8.50 mm, and the polishing conditions are the same as in Table 2. Brush width: 50 mm, brush diameter: 300 mm, rotation speed: 1750 rpm, wire diameter: 0 .4 mm piano wire, polishing time: 5 seconds. Eccentric amount at that time: A = 9 mm, B = 13 mm, C = 18 mm, and 4 types of polishing time and brush pressing amount of 3 seconds, 3 seconds + 2 mm advance, 5 seconds, 5 seconds + 2 mm advance It was. As a result, as in Table 2, the entire circumference of the steel pipe was divided into eight equal parts, and the chamfered state of each part was partially offset when the eccentric amount A = 9 mm and C = 18 mm, and the polishing time was 3 seconds. A chamfering deficiency of less than 0.5 mm was observed in a part of the case for 5 seconds. Therefore, in the case of the object shown in Table 3, it can be seen that good chamfering can be achieved if the eccentricity A is 13 mm and the polishing time is 3 seconds + 2 mm forward and 5 seconds + 2 mm forward.

  As described above, in order to enable a uniform and optimum chamfering amount over the entire circumference of the inner and outer surfaces in the case of a steel pipe, the chamfering time is adjusted to the optimum condition and the eccentricity is controlled. Thus, it is possible to provide an industrially extremely advantageous apparatus and method capable of chamfering in a uniform and short time cycle over the entire circumference on the inner and outer surfaces of the steel pipe.

It is a schematic explanatory drawing of the brush chamfering apparatus of the steel bar and the steel pipe which concerns on this invention. It is a cross-sectional view of the brush chamfering device for steel bars and steel pipes according to the present invention. It is a figure for defining the reference | standard which gives the eccentric amount to the brush which concerns on this invention, and a chamfering evaluation reference | standard. It is a schematic explanatory drawing of the brush chamfering apparatus of the conventional steel bar and steel pipe. It is a schematic explanatory drawing of the other conventional steel bar and steel pipe brush chamfering apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire brush 2 Material to be processed 3 Dock chain 4 Aligning roller 5 Motor for rotating wire brush 6 Motor for rotating brush head 7 Material fixing chuck 8 Brush head 9 Center of material to be processed 10 Stroke 11 Brush head forward / backward moving cylinder 12 End Part


Patent Applicant Sanyo Special Steel Co., Ltd.
Attorney: Attorney Shiina

Claims (5)

In the brush chamfering apparatus for steel bars and steel pipes transferred on the conveying line, the material to be treated is fixed so as not to rotate, and the brush can be rotated perpendicularly and parallel to the longitudinal direction of the material to be treated. A brush chamfering device for steel bars and steel pipes. A brush chamfering device for a steel bar / steel pipe, wherein the brush itself of the brush chamfering device according to claim 1 can rotate. When the processing material according to claim 1 or 2 is a steel pipe, a brush chamfering apparatus for a steel bar / steel pipe, wherein chamfering is performed uniformly over the entire circumference of the inner and outer surfaces. 3. A brush chamfering device for a steel bar / steel pipe, wherein the treatment material according to claim 1 or 2 is a steel pipe, and the eccentric amount of the brush can be adjusted by an outer diameter and an inner diameter. In the brush chamfering method for steel bars and steel pipes transferred on the conveying line, the chamfering amount is controlled by rotating the brush vertically and parallel to the treatment material longitudinal direction and controlling the chamfering machine back and forth or chamfering time. A brush chamfering method for steel bars and steel pipes, characterized in that adjustment and uniform chamfering can be performed over the entire circumference of the treated material end face.

Images