JP6810646B2 - Pipe end processing equipment - Google Patents

Description

The present invention relates to a processing apparatus for processing a pipe end portion, such as various coatings such as plating on the inner and outer peripheral surfaces near the pipe end portion, removal of an epidermis layer such as black skin, or groove processing of the pipe end surface.

In the field of piping construction, pipe materials, pipe joints, etc. are joined by welding, and flanges, flare connections, etc. are performed.
In this case, if the pipe joint or pipe material is plated, coated with a rust preventive, or coated with a chemical conversion treatment, or if a skin layer such as black skin remains, welding is difficult or flare. Since there is a risk that the plating or the like will peel off during edge processing such as processing, and it will be difficult to secure a connecting surface, it is necessary to remove the coating film and the skin layer.
Conventionally, the removal or the groove processing for welding of the end portion is performed manually with a grinder, a file, etc., which is difficult.
Further, in many elbows and the like, as shown in FIG. 5, the open end face of the pipe joint and the side walls 1a and 1b are not at right angles, which causes difficulty in automating the removal process.

In Patent Document 1, a pair of rotary abrasives located inside and outside the pipe end are arranged on the rotary table, and the rotation center position of the rotary abrasive on the outer peripheral side is from the rotation center position of the rotary abrasive on the inner peripheral side. Also discloses an apparatus provided prior to the rotation direction of the rotary table.
However, the technique disclosed in the same publication requires that the pipe be manually pressed with the contact position between the rotary abrasive on the outer peripheral side and the pipe as a fulcrum, and cannot be automatically processed.

Japanese Unexamined Patent Publication No. 8-57754

The present invention can be applied to a plurality of pipes having different pipe diameters, and the pipe end portion can be easily processed even if the pipe material holds the outer peripheral portion and is difficult to rotate, such as an elbow joint. The purpose is to provide the processing equipment of.

The pipe end processing device according to the present invention is a processing device for the inner and outer circumferences or end faces of the pipe end of the piping material, which is located inside the pipe end and is an inner tool for processing the inner peripheral surface. And, it has an outer roll that presses the pipe end from the outside toward the inner tool, is located on the outside of the pipe end, and has an outer tool for processing the outer peripheral surface and a pipe toward the outer tool. It is characterized by having an inner roll that presses the end portion from the inside.
Here, the inner and outer tools are cutting tools, grinding tools, polishing tools, etc. for surface processing, and the inner and outer rolls are rolls that support rotation.

In this way, in order to remove the surface layer on the inner peripheral side of the pipe, the pipe material is strongly pressed against the outer tool side by one of the two sets of tools and rolls arranged inside and outside the pipe. The inner peripheral surface can be machined by rotating and feeding the pipe material at a relatively low speed and rotating the other inner tool at a relatively high speed.
At this time, the outer roll should be lightly pressed toward the inner tool that rotates at high speed.
On the other hand, in order to remove the surface layer on the outer peripheral side of the pipe, the pipe material is strongly pressed toward the inner tool side by one of the outer roll and the outer tool arranged on the outside of the pipe, contrary to the above. The outer peripheral surface can be machined by rotating and feeding the pipe material at a relatively low speed and rotating the other outer tool at a relatively high speed.
In this case, the inner roll is lightly pressed against the outer tool, which rotates at high speed.

By arranging the pair of inner tools and outer rolls arranged facing each other and the pair of inner rolls and outer tools arranged facing each other close to the arc portion, even if the pipe diameters are different from each other, they are machined by the same processing device. it can.
In this case, the outer roll and the inner roll are positioned so that the outer roll and the inner roll are arranged inside the central angle formed by the axis of the inner tool and the outer tool and the axis of the piping material. It is preferable to have a control means.
Here, the position controlling means of the outer roll and the inner roll means having a slide mechanism in the XY axis direction so that the chuck and the pressing can be controlled according to the size of the diameter of the piping material.

In the present invention, since the pipe material is rotationally fed by a combination of the inner / outer roll and the inner / outer tool, the end face of the pipe material is grooved, that is, the end face of the pipe end is processed. An end face tool may be provided for this purpose.
In addition, it has a table on which the pipe end on the processing side of the pipe is placed so that it can be used for pipe materials such as elbow type in which the opening surface of the pipe end and the side wall are not at right angles. The table may have an urging mechanism so that the side wall of the pipe end of the piping material is held vertically.

In the pipe end processing apparatus according to the present invention, two sets of a pair of inner tools and outer rolls and a pair of inner rolls and outer tools arranged so as to face each other are arranged inside and outside along the arc portion of the pipe material. For example, one inner tool and outer roll can rotate the pipe material while the other outer tool can process the outer peripheral surface, and then the inner roll and outer tool rotate the pipe material in the opposite direction while the other. The inner peripheral surface can be processed with the inner tool.
Therefore, although it is a simple device, it is possible to automatically process the inner and outer peripheral surfaces of the pipe end portion.
In particular, if the inner and outer rolls are held inside the central angle formed by the center of the piping material and the inner and outer tools, when the pipe material is held by the outer roll and the inner tool, the outer roll lever is used to inner the pipe material. It can be processed with an outer tool while pressing toward the roll and holding the pipe material stably with the inner roll.
The same applies to the processing of the inner peripheral surface.
At this time, if the side wall is not perpendicular to the opening surface of the piping material such as an elbow, one tool and roll hold the side wall of the pipe material so that it is vertical, and the other roll and tool hold it. The surface can be removed.
Either internal or external processing may be performed first.
Further, if an end face tool that comes into contact with the end face of the pipe is provided, it is possible to perform bevel processing of the end face portion at the same time as processing the inner and outer peripheral surfaces of the pipe end portion.
In the past, the rotation mechanism of the pipe material and the surface processing tool were provided as separate mechanisms, so it was not possible to secure a space for arranging the drive unit or to handle multiple pipe materials with different diameters with a pipe material with a small diameter. It was.
On the other hand, the present invention has a simple structure because it has both a pipe material feeding mechanism and a surface processing mechanism.

An example of arranging the inner / outer tools and the inner / outer rolls of the processing apparatus according to the present invention, and an example of processing the inner peripheral surface are shown. An example of processing the outer peripheral surface is shown. Shows the relationship between the tube end side walls of the elbow and the outer tool, (a) shows the state where a gap d _1. (B) shows a vertical state. The relationship between the tube end side wall inside the bending of the elbow and the tool is shown. (A) has a gap d ₂ , and (b) shows a state in which the gap is eliminated. The table side view of the processing apparatus is shown. The plan view of the processing table is shown. An example of groove processing is shown. The horizontal state (a) and the vertical state (b) of the table are shown.

The processing apparatus according to the present invention is suitable for processing the end portion of a pipe product such as a pipe material or a pipe joint.
Examples of the processing form include removal of surface layers such as plating and black skin, and groove processing of end faces.

FIG. 1 shows an example of tool arrangement.
It has a rotatable outer roll 11 arranged on the outside of the pipe material 1 facing the inner tool 21 for processing the inner peripheral surface of the pipe end portion, and the outer roll 11 puts the pipe material 1 inside from the outside of the pipe material 1. The pressure is controlled toward the tool 21, and the slide is controlled in the XY axis direction so as to correspond to the size of the pipe material.
On the other hand, it has a rotatable inner roll 12 arranged inside the pipe material 1 facing the outer tool 22 for processing the outer peripheral surface of the pipe end portion, and the inner roll 12 has an XY axis toward the outer tool 22. Directional slide control.
Here, examples of the inner tool 21 and the outer tool 22 include a grinding tool such as a grindstone, a cutting tool such as an end mill, and the like.
As shown in FIG. 1 (b), the outer roll 11 and the inner roll 12 rotate to follow the outer peripheral surface or the inner peripheral surface of the pipe end portion.

As shown in FIGS. 5 and 6, a pair of inner tools 21 and an outer roll 11 and a pair so as to be in contact with each other at an arc portion of the pipe materials so as to correspond to a plurality of pipe materials 1A, 2A, 3A ... The inner roll 12 and the outer tool 22 are arranged.

For example, when the piping material is an elbow as shown in FIG. 5, when the pipe end is placed on the horizontal table 41, the side wall 1a of the pipe end is vertical as shown in the enlarged view in FIG. 3A. without the gap d ₁ between the side wall surface of the end portion of the upper front end side and the tube of the outer tool 22 occurs, uniform removal difficult.
On the contrary, as in the case of FIG. 4A, a gap d ₂ is generated inside the bending of the elbow.
Therefore, as shown in FIG. 1 to accommodate such piping material, the center 1 ₀ tube end of the pipe member, the axis 21 0 of the inner tool _21, at the axis 22 ₀ of the outer tools 22 The outer roll 11 and the inner roll 12 are arranged inside the formed central angle θ.
Further, the outer roll 11 and the inner roll 12 form donut-shaped ring protrusions 11a and 12a that come into contact with each other while drivenly rotating the piping material 1, and press the pipe end portion toward the inner tool 21 or the outer tool 22. I made it easy to do.
Further, even if the diameter of the piping material 1 is different, the piping material is controlled in the XY axis direction so that the piping material can be pressed inside the central angle θ.
FIG. 1 shows a state when the inner peripheral surface of the pipe material is processed, and FIG. 2 shows a state when the outer peripheral surface of the pipe material is processed.
As shown in FIG. 3 (a), when placed on a horizontal table elbow, since the gap d ₁ appears between the outer tools 22 and the tube end side walls 1a, toward the inner roll 12 to the outer tool 22 is first And press forward.
At this time, the left side of the table 41 is tilted in the direction of the arrow so as to maintain the tilt of the elbow as shown in FIG. 3 (b).
On the contrary, in the state of FIG. 4, the left side of the table 41 is tilted downward as indicated by the arrow.
In this state, as shown in FIG. 1, the pipe material 1 rotates in the direction of W ₁ at a low speed of the outer tool 22, and the inner tool 21 rotates at a high speed in the direction of V ₁ .
In this way, the inner peripheral surface is processed while varying the inclination of the table 41 so as to follow the inclination of the open end surface of the elbow.
In this case, since the inner tool 21 performs the removal process while holding the pipe material so that the side wall of the elbow is vertical between the inner roll 12 and the outer tool 22, two sets (inner tool 21, outer roll 11) And (inner roll 12, outer tool 22) should be as close to each other as possible.
The inner tool with the center 1 ₀ of the tube 1, by arranging the inner roll 12 on the inside of the central angle θ formed by the outer tool, Te urge toward the tube 1 in the outer roll 11 at this principle The inner tool 21 that rotates at high speed can perform grinding and the like while the pipe material is stably held.
FIG. 2 shows a case where the outer peripheral surface of the pipe material 1 is processed. The pipe material 1 is held by the inner tool 21 and the outer roll 11 so that the side wall of the pipe end is vertical, and the pipe material is rotated in the direction of W ₂ . Machining is performed with the outer tool 22 that rotates at high speed in the direction of V ₂ .
Also in this case, since the outer roll 11 is located inside the central angle θ with respect to the inner tool 21, the pipe material 1 acts to be pressed toward the inner roll 12 by the principle of leverage.

Further, as shown in FIGS. 5 and 6, the structure of the table is pivotally attached to the processed side of the table 41a by the shaft portion 41d, and the other end side is biased from the lower side by an urging member 141a such as a spring. May be good.
In this case, the table 41a is provided at two locations in FIG. 6 so that the table can move up and down not only around the shaft portion 41d but also in the direction orthogonal to the shaft portion 41d to receive the piping material. The piping material may be received by the force members 141a and 141a.
Further, the divided table 41b was arranged inside the table 41a, and the divided table 41c was further arranged inside the divided table 41b.
Further, a pair of urging members 141b and 141c were provided according to the division table.
As a result, it is possible to cope with the size of the piping materials 1A, 2A, 3A.
In the above embodiment, the weight of the piping material is used to tilt the table up, down, left and right, and the structure is supported by a spring from below. However, if the table can cope with the tilt of the elbow or the like, the structure is used. There is no limit to.

FIG. 7 shows an example in which the end face tool 31 in contact with the end face of the pipe material 1 is provided. The end face tool 31 is rotationally controlled by the drive unit 32 and forward / backward controlled by the support unit 33.
As a result, when the end face tool 31 advances and comes into contact with the end face of the pipe material 1 in a state where the pipe material 1 is rotationally fed by the combination of the inner and outer tools and the inner and outer rolls, the peeling processed surface 1a such as plating and the beveled surface 1b Is formed.

As shown in FIG. 8, the processing apparatus according to the present invention may be able to switch the table 41 between the horizontal state shown in (a) and the vertical state shown in (b) with respect to the gantry 43.
In this embodiment, the drive main body 42 arranged on the lower side of the table 41 with respect to the gantry 43 is rotatable by the shaft support 43b, and the operating lever 44 is provided so that the drive main body 42 can be rotated and fixed along the guide groove 43a. It is an example.
In this way, the short pipe material can be processed by placing it on the table 41 as shown in (a), the long material is arranged from the side as shown in (b), and the pipe material is rotationally supported. It can be processed by doing.

1 Pipe material 11 Outer roll 12 Inner roll 21 Inner tool 22 Outer tool

Claims (3)

A processing device for the inner and outer circumferences or end faces of pipe ends of piping materials.
It is located inside the pipe end and has an inner tool for processing the inner peripheral surface and an outer roll that presses the pipe end from the outside toward the inner tool.
A pipe end processing apparatus located outside the pipe end and having an outer tool for processing the outer peripheral surface and an inner roll for pressing the pipe end from the inside toward the outer tool. .. The outer roll and the inner roll provide position control means so that the outer roll and the inner roll are arranged inside the central angle formed by the axis of the inner tool and the outer tool and the axis of the piping material. The pipe end processing apparatus according to claim 1, further comprising. It has a table on which the pipe end portion on the processing side of the piping material is placed, and the table is characterized by having an urging mechanism so that the pipe end side wall of the piping material is held vertically. The pipe end processing apparatus according to claim 1 or 2.

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