EP0385561A1 - Einrichtung zur Oberflächenreinigung eines warm angestauchten Rohrendes - Google Patents

Einrichtung zur Oberflächenreinigung eines warm angestauchten Rohrendes Download PDF

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Publication number
EP0385561A1
EP0385561A1 EP90250051A EP90250051A EP0385561A1 EP 0385561 A1 EP0385561 A1 EP 0385561A1 EP 90250051 A EP90250051 A EP 90250051A EP 90250051 A EP90250051 A EP 90250051A EP 0385561 A1 EP0385561 A1 EP 0385561A1
Authority
EP
European Patent Office
Prior art keywords
blasting
tube
head
nozzle
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90250051A
Other languages
German (de)
English (en)
French (fr)
Inventor
Wulff-Eckhard Von Borcke
Wilfried Meyerling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0385561A1 publication Critical patent/EP0385561A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes

Definitions

  • the present invention relates to a device for cleaning the surface of a hot-soaked pipe end according to the preamble of the main claim.
  • the wall thickness in the end area must be increased depending on the load in the area of application and the type of thread cut. This is done in a known manner in that a certain length at the end of the tube is hot compressed in an upsetting machine and thereby the wall thickness is increased.
  • the surface condition and the dimensional conditions of the hot-soaked pipe end rarely allow direct thread cutting, so that cleaning and dimensional processing are required beforehand.
  • the pipes with the upset pipe ends are removed from the production line and fed to a cleaning station. There, the surface scale is roughly removed with a semi-automatic grinding machine and then critical areas are manually repaired with a hand grinding machine and the upset seams are ground away.
  • the upsetting seams arise during the upsetting process in that, for.
  • the scale can also be removed by blasting.
  • a rotatable blasting head which is connected to a lance which supplies the gaseous carrier medium, usually compressed air and the blasting material, and on which at least one jet nozzle inclined in the longitudinal plane to the inner surface of the tube is arranged.
  • the compressed air and the blasting material are mixed like an injector and directed onto the inner surface of the pipe.
  • This device is not very suitable for cleaning the inner surface of hot-soaked pipe ends, since the rotatable jet heads are very large in size and can no longer be used for smaller inner diameters, and their weight is complicated in terms of weight via a device arranged on the lance have to be supported.
  • Another disadvantage is the fact that the device for supporting the blasting head during the blasting process cannot be adapted to the different inside diameters of a hot-soaked tube end.
  • a further disadvantage is that in the known blasting methods, be it in the manner of free pressure blasting only from one or both ends, or in the manner of a combined pressure-suction blasting, in which underpressure is generated on the opposite end, the Blasting material is distributed throughout the tube and then a complex cleaning process is required to clean the tube accordingly.
  • the object of the invention is to provide a device for cleaning the surface of a hot tube end by means of radiation, which is suitable for removing the scale on the inner surface of the hot tube end with an inner diameter of 160 mm without an expensive support device and can be adapted to different inner diameters during blasting and in one subsequent cleaning of the blasted pipe is not necessary.
  • the previously known blasting methods be it in the type of free pressure blasting only from one or both ends, or in the manner of a combined pressure-suction blasting, in which negative pressure is generated on the opposite end, all have the disadvantage that the blasting material is distributed throughout the pipe and then a complex cleaning process is required to clean the pipe accordingly.
  • the tube moves in the circumferential and longitudinal directions relative to the blasting during the blasting. This movement can be realized in that either the tube moves in the circumferential and longitudinal directions and the jet device remains stationary or vice versa.
  • the exit angle can be adjusted according to the contour of the inner surface to be blasted. This is chosen so that the angle between the axis of the incident beam and the surface line of the inner surface in the direction of the insertion end is always an obtuse angle, i.e. is always greater than 90 degrees.
  • transition area from the compression area to the undeformed pipe is characterized by a conical widening in the direction of the undeformed pipe.
  • angle inclination of this transition area would be the determining variable for the choice of the beam angle.
  • the condition of the obtuse angle for the effect of the blasting material being thrown away is complied with in any case.
  • Internal and external blasting can be carried out simultaneously or separately and can be integrated as a work step in the production line of hot upsetting. With an appropriate coordination of the cycle sequence, the material flow is thereby improved and accelerated.
  • the removal of the Compression seams can be done by grinding or by blasting.
  • the tool In order that the tool can be optimally positioned, it is further developed to contactlessly record the outer circumferential contour of the compressed pipe end. Since the area of the upset seam means a jump in the contour that changes within a certain bandwidth, this can be used for a conversion into a control signal in order to bring the tool into the optimal working position. This is particularly important in the case of blasting, since the blasting material has to be directed quasi-focused onto the upset seam so that the amount of material accumulated in the upset seam can be removed in a reasonable time or the upset seam increase can be reduced to an acceptable level.
  • the device for the internal blasting consists of a blasting head arranged on a lance with at least one blasting nozzle arranged on the circumference, the axis of which is inclined towards the insertion end of the tube to be blasted.
  • Several nozzles with differently set outlet angles or groups of nozzles can also be arranged. In the case of the nozzle groups, the exit angles are the same within a group, but differ from group to group.
  • a group can consist, for example, of two nozzles arranged offset by 180 degrees, so that the jet head or the tube only has to be pivoted by 180 degrees in order to coat the entire inner surface on the circumference.
  • a tube is arranged in the inner hollow body of the blasting head, which tube extends radially to the outside with channels arranged in the area of the front end of the blasting head Connection is established.
  • One of the constructive solutions consists in arranging a disk-like element on the end face of the blasting head, which has a multiplicity of radially extending channels which open into a central bore arranged in the middle, into which the tube extending through the blasting head also opens.
  • the shielding can also be reinforced in such a way that a flexible, heat-resistant element is releasably attached to the end face, the outer diameter of which is at least equal to or slightly larger than the largest inner diameter of the pipe end.
  • a flexible, heat-resistant element is releasably attached to the end face, the outer diameter of which is at least equal to or slightly larger than the largest inner diameter of the pipe end.
  • Such an element can be designed in a simple manner as a brush or as a flexible disk.
  • the flexibility of this element must be such that a simple adaptation to the respective contour is possible during the axial back and forth movement of the jet head.
  • the material of this element must be heat-resistant up to a temperature of approximately 600 degrees Celsius, since the blasting takes place immediately after the upsetting process has ended.
  • External blasting is carried out in a known manner with a blasting head directed towards the tube end, in which, as already described for internal blasting, a commercially available blasting material such as B. corundum, steel, gravel or wire grain with a carrier medium - usually compressed air is used for this purpose - are mixed like an injector.
  • the required movement in the circumferential direction can be carried out by rotating the tube to be blasted or by pivoting the blasting head around the tube.
  • the entire facility for internal and external blasting is provided with a sound-insulated housing and the passage of the pipe to be blasted z. B. sealed by a rubber sleeve. So that the sensitive measuring apparatus for contactless scanning of the outer contour of the hot-soaked pipe end is not damaged, it is folded away during the blasting and, if necessary, covered accordingly.
  • the proposed internal blasting device is not only suitable for the method of descaling hot-soaked pipe ends described here, but can generally be used for any type of surface cleaning with limited internal surfaces. It is irrelevant to the process whether it is a matter of removing scale layers or paints or other particles adhering to the surface. It is essential that the part of the hollow body which is not to be cleaned is not soiled by the blasting material in order to avoid subsequent, possibly complex cleaning.
  • FIG 1 the procedure for the hot upsetting and the subsequent mechanical processing is shown in the form of a schematic diagram.
  • the tube 30, the end or ends of which are to be hot-compressed, is first a heating device, for. B. an induction system.
  • the respective end is heated 31 to the forming temperature and then in an upsetting machine in which e.g. Two cooperating compression half-shells are arranged, retracted and compressed 32 while increasing the wall thickness.
  • the descaling system according to the invention is arranged in the production line, to which the tube 33 is fed with the compressed end.
  • the details of part of this descaling system are shown in Figure 2.
  • the upset tube end is descaled inside and out 34.
  • step 31 If several upsetting steps with more heat are required for the final contour of the upset end, the process already described is repeated starting with step 31.
  • the decision switch is symbolized here by a rhombus 35 . If one upsetting step is sufficient or the last upsetting step has ended, either the descaling 34 or subsequently the upsetting seams 40 (see FIG. 3) are removed 36. This step can be carried out on a separate cleaning stand or in the descaling system already described.
  • the pipe with the cleaned pipe ends is then visually checked 37 and mechanically processed and provided with a thread 38 after approval. After completion of this work, there is a threaded pipe 39 which, depending on requirements, is ready for dispatch or is otherwise treated further.
  • FIG. 2 shows in longitudinal cross section the internal blasting device according to the invention for the descaling of the inner surface of a hot-soaked tube end 1 undeformed pipe can be seen in the right half of the picture.
  • the inner blasting and the outer blasting, not shown here, are carried out either simultaneously or separately after each upsetting step, the contour of a warmly upset tube end being shown after the last upsetting step in this exemplary embodiment.
  • the internal blasting device consists of a the carrier medium, for. B. compressed air and the lance supplying lance with two coaxially arranged hollow bodies 3, 4 which at the end merge into a blasting head 5 which is closed at the end.
  • At least one or more blasting nozzles 7, 7 ' are arranged at a fixed angle in the direction of the insertion end 8 of the pipe to be blasted.
  • the amount of the carrier medium required for blasting is fed through the bore 10 of the inner hollow body 4 and deflected in the blasting head 5 in the direction of an injector nozzle 11, 11 'arranged on the outside of the inner hollow body 4'.
  • the axes of the jet nozzle 7,7 'and the associated injector 11,11' are aligned with each other, as well as the bore 12,13,13 '.
  • the deflection of the supplied carrier medium takes place through a distributor element 14 rotatably arranged in an extension of the inner hollow body 4.
  • This distributor element 14 has recesses 15 on the side facing the insertion end 8, so that a connection between the bore 10 of the inner hollow body 4 and the injector nozzle 13 or 13 'arises. This makes it possible to control jet nozzles 7,7 'individually or in groups with a differently set outlet angle.
  • the distribution element 14 is rotated by a Tube 16 arranged coaxially in the bore 10 of the internal hollow body 4, which is firmly connected to the distributor element 14 and extends through it.
  • a cover 16 is attached to the thickened ends of the two hollow bodies 3.4 'with screws 17, 18, which has a bolt-like extension 19 extending into the interior of the tube.
  • a disk-like body 20 is fastened, in which radially extending channels 21 are arranged.
  • the cover 16 is provided with a central bore 22 which is aligned with the bore of the centrally arranged tube 16. Compressed air is also fed through this tube 16 via the central bore 22 of the cover 16, which then exits radially from the channels 21 of the disk-shaped body 20 and forms a shielding process.
  • the radial channels 21 of the disk-shaped body 20 are angled at the outlet end in the direction of the insertion end 8, so that the exiting air counteracts the blasting material falling to the rear.
  • a brush 23 formed from steel wires is arranged on the bolt 19, which brush is pressed onto the disk-shaped body 20 by means of a disk 24 and a nut 25.
  • the blasting head 5 is moved axially back and forth, here marked by the arrows 26, 26 'and at the same time also rotated or only pivoted, here marked by the arrow 27.
  • This movement must be carried out by the brush 23 and it must be in the Diameter at least equal to or slightly larger than the largest inner diameter of the tube end 1, so that the effect of the shield is maintained during the movement.
  • the largest inside diameter is in the undeformed part of the tube 2, but when widening, it can also lie in the compression area.
  • Figure 3 shows schematically the non-contact scanning method for locating the upset seams 40.
  • a measuring device 41 z. B. an inductive displacement sensor
  • the outer contour 42 of the upset tube end 1 (Fig. 2) is scanned without contact.
  • the measurement signals are fed to an amplifier 44 via a line 43 and then converted into digital values via an analog-digital converter 45.
  • These values flow into a computer 46, in which the measured actual data are compared with predetermined target data.
  • the computer determines the control coordinates and feeds them to a control member 47, the control signals of which are sent to a movable tool holder 48.
  • the tool 49 in this case a schematically represented blasting head, is positioned by means of the tool holder 48 and the emerging blasting material can be focused on the upset seams 40 to be removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Forging (AREA)
EP90250051A 1989-03-01 1990-02-15 Einrichtung zur Oberflächenreinigung eines warm angestauchten Rohrendes Withdrawn EP0385561A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3906937 1989-03-01
DE3906937A DE3906937A1 (de) 1989-03-01 1989-03-01 Verfahren und vorrichtung zum entzundern und verputzen eines warm angestauchten rohrendes

Publications (1)

Publication Number Publication Date
EP0385561A1 true EP0385561A1 (de) 1990-09-05

Family

ID=6375508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250051A Withdrawn EP0385561A1 (de) 1989-03-01 1990-02-15 Einrichtung zur Oberflächenreinigung eines warm angestauchten Rohrendes

Country Status (4)

Country Link
US (1) US4995201A (es)
EP (1) EP0385561A1 (es)
JP (1) JPH02290284A (es)
DE (1) DE3906937A1 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736563A1 (fr) * 1995-07-11 1997-01-17 Comadur Sa Buse de decoupage a jet de fluide devie
EP1787755A1 (de) * 2005-11-19 2007-05-23 Hammelmann Maschinenfabrik GmbH Düsenkopf
DE102014101159A1 (de) * 2014-01-30 2015-07-30 Thyssenkrupp Steel Europe Ag Verfahren zur Oberflächenbehandlung von Werkstücken

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0753267B2 (ja) * 1992-07-27 1995-06-07 アタカ工業株式会社 ダクト内清掃装置
US5664992A (en) * 1994-06-20 1997-09-09 Abclean America, Inc. Apparatus and method for cleaning tubular members
US5735016A (en) * 1994-10-21 1998-04-07 Clean-Aire International, Inc. Duct cleaning apparatus
DE19516780C1 (de) * 1995-05-11 1996-08-08 Kurt Hoerger Hydrodynamische Düse für die Reinigung von Rohren und Kanälen
SE504925C2 (sv) * 1995-07-19 1997-05-26 Jonas Sjoeberg Anordning för rengöring av ledningar och kanaler
US5814162A (en) * 1996-09-25 1998-09-29 Collom International, Inc. Air and spray nozzle
DE19712513B4 (de) * 1997-03-25 2005-05-04 Air Liquide Gmbh Verfahren und Vorrichtung zum Reinigen einer Innenwandung einer Form mittels Trockeneis
US20030032369A1 (en) * 2001-08-10 2003-02-13 Carpenter Steven J. Apparatus and process for surface treating interior of workpiece
US6615848B2 (en) * 2002-01-30 2003-09-09 Halliburton Energy Services, Inc. Electronically controlled pipeline monitoring and cleaning device
EP2145689A1 (en) * 2008-07-16 2010-01-20 VLN Advanced Technologies Inc. Method and apparatus for prepping surfaces with a high-frequency forced pulsed waterjet
US8061296B1 (en) 2009-03-05 2011-11-22 Tom Batur Pipe treatment apparatus
CN102958616B (zh) * 2009-10-06 2016-06-01 苏舍美特科（美国）公司 利用脉冲射流为热喷涂层制备气缸孔表面的方法和设备
CN102267099A (zh) * 2011-08-06 2011-12-07 张铮 一种去除钢管内壁氧化层的方法
NO339945B1 (no) * 2014-07-10 2017-02-20 Vetco Gray Scandinavia As Frigjøring av klemkopling ved hjelp av vannskjæring av drivskrue
RU169972U1 (ru) * 2016-03-22 2017-04-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Устройство для пневмоабразивной обработки внутренних и наружных поверхностей трубных заготовок
RU171191U1 (ru) * 2016-06-06 2017-05-23 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Устройство для пневмоабразивной обработки внутренних и наружных поверхностей трубных заготовок
CN108838175B (zh) * 2018-07-30 2024-03-08 江苏中伟机械制造有限公司 一种管道吹扫消音装置
RU190749U1 (ru) * 2019-03-21 2019-07-11 федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) Устройство для поверхностного пластического деформирования дорнованием
RU192651U1 (ru) * 2019-03-21 2019-09-25 федеральное государственное бюджетное образовательное учреждение высшего образования "Нижегородский государственный технический университет им. Р.Е. Алексеева" (НГТУ) Дорн для поверхностного пластического деформирования отверстий
CN113618643B (zh) * 2021-08-09 2023-04-14 湖南中医药大学 一种医疗器械负压清洗装置

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Publication number Priority date Publication date Assignee Title
US2058388A (en) * 1933-07-14 1936-10-20 Spang Chalfant & Co Inc Method and apparatus for descaling metal
GB795749A (en) * 1956-03-19 1958-05-28 J C Fennelly Company Improvements in or relating to tool for sandblasting
US3109262A (en) * 1962-07-18 1963-11-05 Jack W Weaver Pneumatic motor for sand blaster
FR1565474A (es) * 1968-02-02 1969-05-02
FR2210915A6 (es) * 1972-12-19 1974-07-12 Bianchi Charles
FR2256637A5 (en) * 1973-12-28 1975-07-25 Cablages Electr Refuse shaft cleaning appts. - pumps liquid through support tube to jets under brush lowered down shaft

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US1952848A (en) * 1931-10-30 1934-03-27 Eckler Wilhelm Method of and apparatus for treating the inner surface of tubular bodies with blasts
US2692458A (en) * 1951-12-12 1954-10-26 United States Steel Corp Apparatus for cleaning and descaling tubular articles by abrasive blasting
DE1142298B (de) * 1960-04-08 1963-01-10 Licentia Gmbh Vorrichtung zur Sandbestrahlung der Innenflaeche von Rohren
DD254851A3 (de) * 1974-07-09 1988-03-16 Robert Kunze Verfahren und einrichtung zur automatischen nachbehandlung der einschweissenden und zum innenstrahlen von in rohrboeden eingeschweissten hohlkoerpern oder rohren
GB2085772B (en) * 1980-10-18 1985-05-15 Reliance Hydrotech Ltd Method of treating a surface and device for use in the method
IN166218B (es) * 1984-11-09 1990-03-31 Framatome & Cie
US4718142A (en) * 1986-07-31 1988-01-12 D.W. Tool, Inc. Gas driven pipe cleaner and reel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2058388A (en) * 1933-07-14 1936-10-20 Spang Chalfant & Co Inc Method and apparatus for descaling metal
GB795749A (en) * 1956-03-19 1958-05-28 J C Fennelly Company Improvements in or relating to tool for sandblasting
US3109262A (en) * 1962-07-18 1963-11-05 Jack W Weaver Pneumatic motor for sand blaster
FR1565474A (es) * 1968-02-02 1969-05-02
FR2210915A6 (es) * 1972-12-19 1974-07-12 Bianchi Charles
FR2256637A5 (en) * 1973-12-28 1975-07-25 Cablages Electr Refuse shaft cleaning appts. - pumps liquid through support tube to jets under brush lowered down shaft

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736563A1 (fr) * 1995-07-11 1997-01-17 Comadur Sa Buse de decoupage a jet de fluide devie
EP1787755A1 (de) * 2005-11-19 2007-05-23 Hammelmann Maschinenfabrik GmbH Düsenkopf
US7780100B2 (en) 2005-11-19 2010-08-24 Hammelmann Maschinenfabrik Gmbh Nozzle head
DE102014101159A1 (de) * 2014-01-30 2015-07-30 Thyssenkrupp Steel Europe Ag Verfahren zur Oberflächenbehandlung von Werkstücken
DE102014101159B4 (de) * 2014-01-30 2016-12-01 Thyssenkrupp Steel Europe Ag Verfahren zur Oberflächenbehandlung von Werkstücken
US10449597B2 (en) 2014-01-30 2019-10-22 Thyssenkrupp Steel Europe Ag Method for the surface treatment of a workpiece

Also Published As

Publication number Publication date
DE3906937C2 (es) 1991-08-08
JPH02290284A (ja) 1990-11-30
DE3906937A1 (de) 1990-09-06
US4995201A (en) 1991-02-26

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