JP2010029963A - Steel pipe end finishing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel pipe end finishing machine including a swarf anti-scattering mechanism capable of correctly preventing swarf or the like from scattering and entering the inside of a steel pipe when cutting and chamfering an end face of the steel pipe by the steel pipe end finishing machine. <P>SOLUTION: A shielding disk 23 which includes its periphery inserted in tight contact with an internal surface of the steel pipe and does not rotate circumferentially when cutting the steel pipe end is provided inside a pipe end of the steel pipe 1 as the swarf anti-scattering mechanism. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a steel pipe end surface finishing machine equipped with a cutting dust scattering prevention mechanism for preventing cutting chips and the like from being scattered and entering the steel pipe when chamfering and chamfering the steel pipe end surface by a steel pipe end surface finishing machine. It is about.

  Usually, a pipe end portion of a steel pipe (for example, UOE steel pipe) is subjected to groove (chamfering) processing for circumferential welding by a steel pipe end surface finishing machine.

  The steel pipe end face finishing machine has a cutting tool for cutting a steel pipe end face attached to a rotating face plate, and the end face of the steel pipe fixed by a chuck is cut by the cutting tool to be chamfered.

  When the steel pipe end face is machined by such a steel pipe end face finishing machine, there is a problem in that cutting scraps and chipped bite pieces are scattered and enter the steel pipe, and the inside of the steel pipe needs to be cleaned.

With respect to this problem, Patent Document 1 discloses that a cutting disc or the like is placed inside the steel pipe by inserting and arranging a shielding disc concentrically held on the rotating face plate inside the pipe end inside the pipe end. A technique for preventing entry is disclosed.
JP 2005-046915 A

  However, in the technique described in Patent Document 1, since the shielding disk concentrically held by the face plate rotates with the rotation of the face plate, the inner surface of the fixed steel pipe and the shielding disk are rubbed, There is a possibility that peeling powder of the shielding disk is generated and enters the steel pipe. In addition, if the diameter of the shielding disk is reduced so that the shielding disk does not rub against the inner surface of the steel pipe, a gap is formed between the shielding disk and the inner surface of the steel pipe. Get in.

  The present invention has been made in view of the above circumstances, and when cutting and chamfering a steel pipe end surface with a steel pipe end surface finishing machine, it is possible to accurately cut off chips and the like and enter the inside of the steel pipe. An object of the present invention is to provide a steel pipe end surface finishing machine equipped with a cutting dust scattering prevention mechanism that can be prevented.

  In order to solve the above problems, the present invention has the following features.

[1] In order to prevent cutting waste generated when cutting a steel pipe end face using a steel pipe end face finishing machine having a steel pipe end face cutting tool attached to a rotating face plate from scattering into the steel pipe. A steel pipe end face finishing machine equipped with a cutting dust scattering prevention mechanism,
A cutting dust scattering prevention mechanism characterized by comprising a shielding disk that is inserted into the pipe end inside the steel pipe in close contact with the inner surface of the steel pipe and that does not rotate in the circumferential direction when cutting the steel pipe end face. Steel pipe end finishing machine equipped.

  [2] The steel pipe end surface finishing machine provided with the cutting dust scattering prevention mechanism according to claim 1, wherein the shielding disk is made of an elastic body and is a disk having a diameter larger than the inner diameter of the steel pipe.

  In the present invention, when cutting and chamfering a steel pipe end face by a steel pipe end face finishing machine, it is possible to accurately prevent cutting chips and the like from being scattered and entering the inside of the steel pipe. As a result, it is not necessary to clean the inside of the steel pipe due to the entry of cutting waste and the like, and the manufacturing cost can be reduced and the productivity can be improved.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a steel pipe end face finishing machine according to an embodiment of the present invention. This steel pipe end surface finishing machine includes a main shaft 14 rotatably supported via a bearing 13 on a main shaft support frame 12 installed on the entire frame 11, and a face plate 15 concentrically fixed to the tip of the main shaft 14. The copying roller 16 attached to the face plate 15, the steel pipe end face cutting tool 17 also attached to the face plate 15, and a clamp for fixing the steel pipe 1 in a state where the central axis of the steel pipe 1 coincides with the rotation center axis of the main shaft 14. 19, the main shaft 14 is driven to rotate, and the outer surface of the steel pipe 1 fixed by the clamp 19 is copied by the copying roller 16, and the end surface of the steel pipe 1 is cut by the cutting tool 17 to be chamfered. It has become. Here, a plurality of cutting tools 17 for cutting the end surface of the steel pipe 1 can be arranged for cutting the outer surface and for cutting the inner surface, and the outer surface and the inner surface can be cut simultaneously to perform chamfering.

  In addition, in this embodiment, in order to prevent cutting scraps and the like in the cutting tool 17 from scattering and entering the inside of the steel pipe 1, it is inserted inside the pipe end of the steel pipe 1 and does not rotate in the circumferential direction. A cutting dust scattering prevention mechanism provided with a shielding disk 23 whose peripheral edge is disposed in close contact with the inner surface of the steel pipe 1 is provided.

  That is, a through hole 20 penetrating in the axial direction is provided in the rotation center portion of the main shaft 14 and the face plate 15, and a shielding disk support shaft 21 is disposed through the through hole 20. A shielding disk 23 is attached to the distal end portion 21 a of the disk support shaft 21 by a fixing bracket 22.

  The shielding disc support shaft 21 is supported by, for example, bearings 24 and 25 disposed at the rear ends of the face plate 15 and the main shaft 14, and is separated from the rotation of the main shaft 14 and the face plate 15. That is, the shielding disk support shaft 21 is configured to maintain a non-rotating state regardless of the rotation of the face plate 15 and the main shaft 14. The position where the bearings 24 and 25 are arranged is not limited to the above case as long as the position can support the shielding disk support shaft 21.

  Further, the rear end portion 21 b of the shielding disk support shaft 21 may be provided so as to penetrate through the through hole 26 a provided in the rotation preventing member 26. In this case, as shown in the AA arrow view of FIG. 1, the rear end portion 21 b of the shielding disk support shaft 21 has a square cross section, and the through hole 26 a of the rotation preventing member 26 also has a square cross section. By doing so, the shielding disc support shaft 21 can be configured not to rotate.

  On the other hand, the shielding disk 23 is made of a soft material such as a rubber-like elastic body. The shielding disk 23 is a disk having a diameter slightly larger than the inner diameter of the steel pipe 1, and the peripheral edge comes into close contact with the inner surface of the steel pipe 1 when inserted into the pipe end inside the steel pipe 1. ing. In addition, as a material of the said shielding disc 23, things made from rubber | gum, MC nylon (trademark), etc. can be used, for example.

  In the steel pipe end surface finishing machine provided with such a cutting dust scattering prevention mechanism, a shielding disk 23 is inserted inside the pipe end of the steel pipe 1 fixed by the clamp 19, and the periphery thereof is in close contact with the inner surface of the steel pipe 1. In this state, the spindle 14 is rotationally driven, and the end surface of the steel pipe 1 is cut with the cutting tool 17 while copying the outer surface of the steel pipe 1 with the copying roller 16.

  Thereby, the cutting waste etc. by the cutting process with the cutting tool 17 are shielded by the shielding disk 23 and are prevented from entering the inside of the steel pipe 1 more than that. And the cutting waste etc. which were shielded by the shielding disk 23 and accumulated on the pipe end side are scraped out to the outside of the steel pipe 1 when the shielding disk 23 is detached from the inside of the pipe end of the steel pipe 1. The scraped scraps are collected in a collection box by a scrap scrap chute or a conveyor (not shown).

  In this way, in this embodiment, the cutting disc including fine cutting scraps is scattered and enters the inside of the steel pipe 1 by the shielding disc 23 inserted in close contact with the pipe end inside of the steel pipe 1. Is prevented accurately. Furthermore, the cutting disc including the fine cutting waste collected on the pipe end side is efficiently collected by the shielding disc 23 when the steel pipe 1 is separated from the inside of the pipe end. In addition, the insertion and removal of the shielding disk 23 is performed in a series of operations of the steel pipe end face finishing machine, so that the cycle time of the steel pipe end face finishing machine is not affected. Further, since the shielding disk 23 is configured not to rotate as described above, the shielding disk 23 is not rubbed against the inner surface of the steel pipe 1 during the cutting process of the end face of the steel pipe 1. 23 peeling powder does not occur.

  Therefore, in this embodiment, when the end surface of the steel pipe 1 is cut, it is not necessary to clean the inside of the steel pipe 1 due to the entry of cutting waste or the like, thereby reducing the manufacturing cost and improving the productivity. it can.

  In the above, the shielding disk 23 may reduce the working space when the cutting tool 17 is replaced. Therefore, the shielding disk support shaft 21 can be moved in the axial direction by a hydraulic cylinder or the like, and when the cutting tool 17 is replaced, the shielding disk support shaft 21 is advanced to retract the shielding disk 23. It is preferable to secure a space for replacing the cutting tool 17.

It is a figure which shows one Embodiment of this invention. It is an AA arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel pipe 11 Whole mount 12 Main shaft support mount 13 Bearing 14 Main shaft 15 Face plate 16 Copying roller 17 Steel pipe end face cutting tool 19 Clamp 20 Through-hole 21 Shielding disc support shaft 21a End portion of shielding disc support shaft 21b Shielding circle Rear end portion of plate support shaft 22 Fixing bracket 23 Disc for shielding 24 Bearing 25 Bearing 26 Anti-rotation member 26a Through hole of anti-rotation member

Claims (2)

Cutting debris to prevent the cutting debris generated when cutting the end face of the steel pipe using a steel pipe end face finishing machine with a rotating face plate attached with a cutting tool for cutting the end face of the steel pipe from entering the inside of the steel pipe A steel pipe end face finishing machine equipped with a scattering prevention mechanism,
A cutting dust scattering prevention mechanism characterized by comprising a shielding disk that is inserted into the pipe end inside the steel pipe in close contact with the inner surface of the steel pipe and that does not rotate in the circumferential direction when cutting the steel pipe end face. Steel pipe end finishing machine equipped.   The steel pipe end surface finishing machine provided with the cutting dust scattering prevention mechanism according to claim 1, wherein the shielding disk is made of an elastic body and is a disk having a diameter larger than the inner diameter of the steel pipe.

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