EP2983845B1 - Method for strengthening and calibrating a pipe segment - Google Patents
Method for strengthening and calibrating a pipe segment Download PDFInfo
- Publication number
- EP2983845B1 EP2983845B1 EP14716337.2A EP14716337A EP2983845B1 EP 2983845 B1 EP2983845 B1 EP 2983845B1 EP 14716337 A EP14716337 A EP 14716337A EP 2983845 B1 EP2983845 B1 EP 2983845B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer tube
- tube
- pipe
- thread
- ring
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 43
- 238000005728 strengthening Methods 0.000 title description 3
- 238000010276 construction Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 150000003751 zinc Chemical class 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910001335 Galvanized steel Inorganic materials 0.000 description 7
- 239000008397 galvanized steel Substances 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 6
- 244000089486 Phragmites australis subsp australis Species 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000003716 rejuvenation Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/026—Enlarging by means of mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G2025/042—Shores or struts; Chocks telescopic with devices to avoid accidental disengagement of the telescopic elements, e.g. during transport
Definitions
- the invention relates to a method for strengthening and calibrating a thin-walled pipe section of an outer tube of a telescopic support for the construction sector, a device for carrying out the method, a pipe section produced by the method of an outer tube of a telescopic support and a telescopic support with a thin-walled pipe section.
- Telescopic supports are used for a variety of supporting tasks, for example as ceiling or erection supports for supporting concrete formwork.
- the telescopic supports have an outer tube and an inner tube axially displaceable relative to the outer tube.
- the outer tube may have a thread on which the inner tube is indirectly or directly supported.
- the thread of the outer tube is usually an external thread.
- Telescopic supports are for example from the DE 10 2009 054 628 A1 known.
- the outer tubes of the telescopic supports used are usually galvanized steel tubes. On the galvanized steel tubes, the thread can be rolled up.
- outer tubes are used with the largest possible outer diameter and low wall thickness.
- the problem can be remedied by welding a finished threaded piece onto a thread-free outer tube.
- the resulting weld can be a weak point of the telescopic support.
- the weld must be post-treated to ensure adequate corrosion protection.
- the WO 2010/137984 A1 discloses a prop with a thread rolled up on an outer tube and further also a method according to the introductory part of claim 1.
- Object of the present invention is therefore to provide a method for strengthening and calibrating at least one pipe section of an outer tube of a telescopic support.
- Step b) is carried out after step a) or simultaneously with step a).
- Steps c) and d) are carried out after steps a) and b).
- the method according to the invention can be applied to the entire pipe or a pipe section.
- the stamp can be pushed completely through the pipe.
- the stamp is only partially inserted into a pipe section and pulled out again.
- the stamp is inserted about 300mm into the tube.
- the tube used in the method is thus expanded by a punch or mandrel, which is inserted from the inside into the tube.
- the pipe When expanding the pipe section, the pipe is preferably expanded by about 1mm, i. The outer diameter increases by the expansion by about 1mm.
- expanding the tube creates a structural change that causes a consolidation of the expanded pipe section. Furthermore, by inserting the stamp, a calibration of the inner diameter of the expanded pipe section. The inner diameter of the pipe section is thereby formed on the outer diameter of the punch.
- a punch In order to facilitate the insertion of the stamp, a punch can be used, which has a first bevel or rounding between its first entering the pipe front and its voltage applied to the inside of the pipe section outside.
- the extraction of the punch from the tube can be facilitated if a punch is used, which has a second bevel or rounding between its voltage applied to the inside of the pipe section outside and its front side opposite the rear side.
- the insertion of the stamp is preferably carried out at room temperature, so that a cold deformation or cold forming of the expanded pipe section takes place.
- a further consolidation of the tube and a calibration of the outer diameter of the treated in the process pipe section takes place in that after the expansion of the pipe section, the tube is at least partially covered by the ring whose inner diameter is smaller than the outer diameter of the expanded pipe section.
- the expanded pipe section is thereby tapered by the inside of the ring, which is pulled over the expanded pipe section. In this case, a structural change of the tapered pipe section takes place. Due to the calibrated outer diameter, an external thread can be applied to the pipe particularly well.
- the drawing of the ring over the outside of the expanded pipe section is preferably carried out at room temperature, so that a cold deformation of the now tapered pipe section takes place.
- a ring whose inner diameter substantially corresponds to the outer diameter of the pipe section before expansion by the punch.
- a pipe or pipe section can be produced, the outer diameter of which, after carrying out the method according to the invention, corresponds to the outer diameter before carrying out the method according to the invention. If the method according to the invention is carried out only on one pipe section, then a pipe with a constant outside diameter can be achieved on the treated and untreated pipe sections of the pipe. At the same time, however, the treated pipe section is solidified and its outer diameter is calibrated or the roundness is improved.
- the tolerance of the outer diameter can be improved from typically ⁇ 0.3mm to ⁇ 0.15mm.
- stamp and ring are preferably guided at a fixed distance from each other.
- a device for carrying out the method can be constructed structurally simple.
- Stamp and ring can be arranged, for example, on a common bracket.
- punch and ring may be integrally formed.
- the ring is preferably performed about 20mm in front of the stamp.
- a thread is applied to the consolidated and calibrated tube section.
- the thread is, especially in the form of an external thread, rolled up.
- the treated pipe can be used as the outer tube of a telescopic support in the construction sector.
- On the treated pipe section is particularly preferably a thread in the form of a trapezoidal thread with a flank angle of less than 15 °, in particular 10 °, rolled. Due to the small flank angle, a very high load can be transferred to the thread.
- a tube in the form of a galvanized steel tube can be used.
- such a pipe has at least one treated pipe section with high stability, dimensional stability and corrosion resistance.
- Galvanized steel tubes are manufactured in standardized quantities in large quantities and can be obtained inexpensively.
- the advantages of the method according to the invention are particularly useful when a pipe with an outside diameter of more than 60 mm and a wall thickness of less than 3 mm, in particular with a wall thickness of less than 2.7 mm, is used to carry out the method.
- threads can also be rolled up on these tubes.
- the invention thus relates to a method for producing an outer tube of a telescopic support for the construction sector, wherein at least one pipe section of the outer pipe is treated by a method described above.
- No part of the invention is a device for carrying out a method described above, comprising a clamping device for firmly receiving a tube, a round cross-section punch which can be pressed into the tube in the longitudinal direction of a clamped tube and a ring in the longitudinal direction of the clamped tube can be pulled over the outside of the tube.
- the ring has - except for one or two end chamfers - a constant inner diameter.
- the ring is structurally simple and inexpensive to produce and also allows the production of a particularly high quality outer surface of the machined pipe section.
- the punch is preferably movable together with the ring along the longitudinal axis of a clamped tube. As a result, a control of the method carried out with the device can be simplified.
- the stamp is connected to the ring.
- the device is structurally particularly simple executable.
- the connection between the punch and ring is immediate and rigid.
- no part of the invention is an outer tube of a telescopic support for the construction sector, wherein the outer tube is integrally formed with a continuous outer diameter and at least partially has a rolled onto its outer surface external thread and / or rolled up on its inner circumferential surface internal thread, wherein the ratio of the outer diameter of the outer tube to the wall thickness of the outer tube is greater than 26.2.
- One-piece outer tubes of telescopic posts with a continuous outer diameter and such a large outer diameter to wall thickness ratio are both very light and extremely stable.
- the production of such outer tubes can be carried out at least partially by the method according to the invention described above.
- the outer tube is preferably made of galvanized steel. Galvanized steel is corrosion resistant, stable and comparatively inexpensive.
- the outer diameter of the outer tube is greater than 60.3mm, ie it is suitable for loads over 30kN.
- the outer tube is therefore particularly stable and easily formed.
- the cross-sectional area of the outer tube is preferably always greater than 419 mm 2 .
- a telescopic support for the construction sector with a previously described outer tube and axially displaceably arranged therein inner tube.
- a stop element may be provided in the region of one end of the outer tube, wherein the stop element at least partially obscures the free cross-sectional area of the outer tube. Covering the cross-sectional area in the present application also means an at least partial projection of the stop element into the clear cross-section of the outer tube.
- the stop element is preferably attached according to the invention without separate connection means on the outer tube and arranged in the simplest case only in a press fit on or in the outer tube.
- the stop element can also be arranged in the sense of a snap ring in a groove arranged on the outer tube or via a latching connection or a bayonet-type fastening to the outer tube.
- the stop element is connected to the outer tube and this in the region of the free end of the outer tube.
- the stop element engages in an arranged on a lateral surface of the outer tube inner and / or outer thread of the outer tube, wherein a particularly resilient arrangement of the stop member is achieved in that the stop element with an external and / or internal thread into the or engages in the corresponding thread of the outer tube.
- the stop element is assigned a Auscompêt.
- the Auscompêt may in particular have a arranged on the stop element and einschlag in the thread of the outer tube bare locking tab.
- the stop element here an impact flap, engages in a passage opening of the outer tube.
- the load capacity of the stop member against axial loads is further improved in that the stop element at least partially covers an end face, ie an end wall portion of one end of the outer tube.
- the stop element is preferably formed according to an embodiment as a cap or as a sleeve.
- impurities such as fresh concrete
- the stop element thereby serve as a (sliding) bearing and at the same time as a stripping element for a contaminated inner tube. Is this Stop element designed as a cap or as a sleeve, it must be done to create a stop element on the outer tube no additional processing.
- the failsafe independent of the orientation of the inner tube in the outer tube of the stop means of the inner tube is preferably formed as a flared, for example crimped, end of the inner tube.
- the inner tube according to a development at least one radially over its outer lateral surface laterally projecting projection on the flared end of the inner tube, the stop means arranged axially spaced is.
- the projection is preferably formed integrally with the inner tube and made in particular via a forming process on the inner tube.
- the projection is advantageously formed in the form of a nub or a bead projection and may extend in the circumferential direction of the inner tube over a preferably large circumferential angle.
- a plurality of projections may be provided, which are lined up along the outer circumference of the inner tube spaced from each other and which are preferably arranged in a plane orthogonal to the longitudinal axis of the inner tube level.
- the inner tube is for the purpose of improved positioning accuracy and a reliable support behavior on the stop element and / or on an inner circumferential surface of the outer tube, preferably in Gleitspiel positive connection, axially guided.
- the inner tube on the inner circumferential surface of the outer tube expedient manner with the one stop means, here for example with the crimped edge of its arranged in the outer tube end, and / or out with the at least one projection.
- the trained preferably as a cap stop element has, according to a particularly preferred manufacturing under aspects of development an internal thread which engages in an external thread of the outer tube, wherein the external thread is additionally engaged with an internal thread of a lowering nut on which a transverse to the longitudinal axis of the telescopic support by the Outer and inner tube feasible securing bolt can be supported.
- the stop element can be screwed directly onto an already provided thread.
- the stop element acts at the same time in the sense of a lock nut or a stop element for the lowering nut, so that it is arranged captive on the telescopic support.
- the outer tube preferably has a substantially constant inner diameter over its entire axial length.
- the outer tube may also have a sectionally widened inner diameter.
- the described prop (telescopic support) has the advantage that it is easy to assemble (final assembly).
- the outer and inner tube can be edited and manufactured without additional elements and only when assembling the outer and inner tube, the lowering nut is screwed with the associated elements on the outer tube.
- the fuse pin is attached to the outer tube prior to assembly of the inner tube with the outer tube. If the prop is joined together, the securing bolt can only be used in the region of the insertion opening, provided that the stop element has an outer diameter which is greater than the inside diameter of a portion of the correspondingly shaped securing bolt comprising the outer tube.
- Fig. 1 is a generally designated 10 telescopic support for the construction sector in a selected column section reproduced.
- the telescopic support 10 has an outer tube 12 and an inner tube 14 arranged axially displaceable therein.
- the inner tube 14 has at its in the figure above shown free end 16 a known support plate 18, while the outer tube 12 has a foot plate for secure positioning on a respective substrate at its not shown in detail in Fig. Foot end.
- a cap 22 is arranged, which serves as a stop element for the inner tube 14 and by the axial removal or a failure of the inner tube 14 is prevented from the outer tube 12.
- the cap 22 is formed in a manner corresponding to a cap nut and has a substantially cylindrical wall portion 24 with an internal thread 26. Adjoining the cylindrical wall section 24 is an edge region 28 of the cap 22 which is arranged above the cylindrical wall section 24 and which is angled radially in the direction of a cylindrical longitudinal axis 30 of the telescopic support 10 and which has a free cross-sectional surface 32 the outer tube 12 partially covered.
- the cap 22 and its internal thread 26 is in engagement with a arranged on the outer circumferential surface 34 of the outer tube 12 external thread 36.
- external thread 36 of the outer tube 12 also engages a so-called lowering nut 38 at which a handle 38 ' is arranged pivotably and which is axially movable by rotation about the longitudinal axis 30 of the telescopic support 10 on the outer tube 12 along.
- the outer tube 12 has in this respect two opposite and parallel to the longitudinal axis 30 of the telescopic support 10 elongated first through openings (slots) 42, while the inner tube 14 has a plurality of circular opposing (aligned) second through-openings 44 which along the inner tube 14 in each case Periodically under or over each other are arranged.
- the inner tube 14 is first pulled out to a desired length of the telescopic support 10 and the locking bolt 40 subsequently inserted through the first through-insertion openings 42 of the outer tube and with these each aligned second insertion openings 44 of the inner tube 14.
- the inner tube 14 has a trained as flared end stop means 48, for the purpose of fail-safe of the inner tube 14 from the outer tube 12 to the cap 22 and at its angled edge region 28 can be brought to the plant, unless further security elements are effective.
- the inner tube 14 additionally has a plurality of knob-like projections 50, which are arranged at a distance from the stop means (widened end) 48 of the inner tube 14 and project laterally radially beyond an outer lateral surface 34 of the inner tube 14.
- the knob-like projections 50 are brought into contact with the cap 22 upon reaching a predetermined maximum extension of the inner tube 14 and thus enforce a remaining in the outer tube 12 minimum length of the inner tube 14.
- the inner tube 14 is therefore supported on an inner circumferential surface 52 of the outer tube 12th from, whereby a levering of the cap 22 is reliably avoided by the outer tube 12.
- the knob-like projections 50 have a function as the stop means 48 and limit the Teleskopierin the telescopic support.
- the internal thread 26 of the cap 22 is, as in the FIGS. 3 and 4 is shown in more detail, designed as a flat profile and has a thread profile 54 interrupted along the thread.
- FIG. 5 the individual parts of the telescopic support 10 are shown before joining the inner tube 14 to the outer tube 12.
- the above-explained support plate 18 is already welded, while at the foot-side end of the outer tube 12, a foot plate 58 is welded.
- the lowering nut 38 is screwed onto the external thread 36 of the outer tube 12, while the cap 22 is pushed onto the inner tube 14 and secured by the knob-like projections 50 and the support plate 18 against axial removal from the inner tube 14.
- Fig. 6a shows a sectional side view of an apparatus 60 for carrying out a method according to the invention for the production of the outer tube 12.
- the device 60 is shown in a first position.
- the device 60 is shown greatly simplified and schematically. Guides, drives and the like of the device 60 have not been shown for reasons of clarity.
- the outer tube 12 is in Fig. 6a in an untreated condition.
- In the outer tube 12 may be a galvanized steel tube with a
- Outer diameter of about 60.3mm, in particular of 71mm, 76.5mm, 83mm or 83.5mm, and a wall thickness of 2.6mm act.
- the outer tube is clamped on the right in a tensioning device (not shown) of the device 60.
- the external thread 36 (see Fig. 1 . 2 . 5 ) of the outer tube 12 could be in the in Fig. 6a shown state of the outer tube 12 are not rolled up, since the ratio of outer diameter to wall thickness and the tolerance of the outer diameter of the outer tube for this purpose in the case of the stated outer diameter and wall thicknesses is too large.
- the outer tube 12 is therefore in the inventive method, which in the Fig. 6a-6d is solidified in the area of deformation and calibrated the outer diameter, that is, the tolerance of the outer diameter is reduced.
- the device 60 has this according to Fig. 6a a punch 62 and a ring 64.
- the punch 62 and the ring 64 are rotationally symmetrical to the dash-dotted line longitudinal axis of the outer tube 12 is formed.
- the inner diameter of the inner lateral surface 66 of the ring 64 corresponds to the calibrated outer diameter, ie the outer diameter of the outer tube 12 to be achieved.
- the inner lateral surface 66 of the ring 64 is circular in shape in order to achieve improved roundness of the outer circumferential surface of the outer tube 12.
- the ring 64 has a first rounding 68 and a second rounding 70 in order to be able to be guided better over the outer tube 12.
- Fig. 6b shows the device 60 in a second position.
- the punch 62 and the ring 64 are shifted together in this illustration to the right.
- the punch 62 is connected to the ring 64.
- the Connection between the punch 62 and the ring 64 is in the illustrations of Fig. 6a-6d not shown for reasons of clarity.
- the inner diameter of the ring 64 substantially corresponds to the outer diameter of the untreated outer tube 12. The ring 64 can therefore be pushed onto the outer tube 12 with little effort.
- Fig. 6c shows the device 60 in a third position.
- the punch 62 is inserted under force in sections in the outer tube 12. To facilitate the insertion of the punch 62, this has a third rounding 72. With far in the outer tube 12 retracted punch 62 allows a fourth rounding 74 a slight extension of the outer tube 12 (not shown). By retracting the punch 62, the outer tube 12 is widened in a first tube section 76 by cold forming. The first pipe section 76 is thus somewhat longer and the wall thickness in the first pipe section 76 somewhat smaller.
- Fig. 6d shows the device 60 in a fourth position.
- the punch 62 has been moved together with the ring 64 to the left of the outer tube 12 away.
- the ring 64 was pulled under force over the expanded first pipe section 76.
- the outer diameter of the expanded first tube section 76 was thereby restored to the original outer diameter of the tube 12 according to Fig. 6a rejuvenated.
- the roundness and tolerance of the outer diameter was improved.
- the taper further causes a cold forming of the first pipe section 76. In this way, a further solidification of the first pipe section 76 is achieved.
- the wall thickness of the first pipe section 76 has been increased, as has the length of the outer pipe 12.
- the device 60 in FIG Fig. 6d is in the same position as in Fig. 6a ,
- the Fig. 6a-6d therefore show a complete cycle of the method described above.
- Such a cycle lasts about 8 seconds, with the punch 62 being introduced into the tube section 76 by about 300 mm.
- the external thread 36 can now be easily rolled onto this first pipe section 76.
- Fig. 6e shows the outer tube 12, wherein the first tube section 76 has the external thread 36.
- the external thread 36 was rolled up onto the first pipe section 76.
- a section 78 of the external thread 36 is marked.
- Fig. 6f shows the cutout 78 of the external thread 36 Fig. 6e , Out Fig. 6f it can be seen that the external thread 36 has a flank angle F.
- the flank angle F is 10 ° (for illustrative purposes, a larger angle is shown in the drawing). Due to the small flank angle of less than 15 ° less inward radial forces must be absorbed by the outer tube 12 under load of the external thread 36.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Supports For Pipes And Cables (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Heat Treatment Of Articles (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Coating With Molten Metal (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Insulating Bodies (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Festigung und Kalibrierung eines dünnwandigen Rohrabschnittes eines Außenrohrs einer Teleskopstütze für den Baubereich, eine Vorrichtung zur Durchführung des Verfahrens, einen durch das Verfahren hergestellten Rohrabschnitt eines Außenrohrs einer Teleskopstütze sowie eine Teleskopstütze mit einem dünnwandigen Rohrabschnitt.The invention relates to a method for strengthening and calibrating a thin-walled pipe section of an outer tube of a telescopic support for the construction sector, a device for carrying out the method, a pipe section produced by the method of an outer tube of a telescopic support and a telescopic support with a thin-walled pipe section.
Im Bausektor werden Teleskopstützen für vielfältige Abstützaufgaben verwendet, beispielsweise als Decken- oder Einrichtstützen zum Abstützen von Betonschalungen. Die Teleskopstützen weisen ein Außenrohr und ein relativ zu dem Außenrohr axial verschiebbares Innenrohr auf. Das Außenrohr kann ein Gewinde aufweisen, an dem sich das Innenrohr mittelbar oder unmittelbar abstützt. Bei dem Gewinde des Außenrohres handelt es sich dabei in der Regel um ein Außengewinde. Derartige Teleskopstützen sind beispielsweise aus der
Bei den eingesetzten Außenrohren der Teleskopstützen handelt es sich üblicherweise um verzinkte Stahlrohre. Auf die verzinkten Stahlrohre kann das Gewinde aufgerollt werden.The outer tubes of the telescopic supports used are usually galvanized steel tubes. On the galvanized steel tubes, the thread can be rolled up.
Um das Gewicht der Außenrohre bei gleichbleibender Tragkraft zu reduzieren, werden Außenrohre mit möglichst großem Außendurchmesser und geringer Wandstärke eingesetzt.In order to reduce the weight of the outer tubes with constant load capacity, outer tubes are used with the largest possible outer diameter and low wall thickness.
Bei der Fertigung solcher Außenrohre hat sich jedoch herausgestellt, dass auf die Außenrohre nur schwer ein Gewinde aufgerollt werden kann. Die aufgerollten Gewinde weisen nicht die nötige Stabilität auf, um die auf das Gewinde übertragene Last aufzunehmen. Beispielsweise wurde in Versuchen beobachtet, dass eine auf ein Außengewinde eines Außenrohres aufgeschraubte Mutter auf dem Außengewinde "durchrutscht". In anderen Fällen ist das Gewinde beim Aufrollen abgerissen. Dies liegt einerseits an den geringen Wandstärken der eingesetzten Rohre und andererseits an den Toleranzen in der Rundheit des Rohrquerschnitts und dem Außendurchmesser des Rohres.In the production of such outer tubes, however, it has been found that it is difficult to roll a thread on the outer tubes. The coiled threads do not have the necessary stability to accommodate the load transferred to the thread. For example, it has been observed in tests that a nut screwed onto an external thread of an outer tube "slips" on the external thread. In other cases, the thread is torn off when rolled up. This is due, on the one hand, to the low wall thicknesses of the tubes used and, on the other hand, to the tolerances in the roundness of the tube cross section and the outside diameter of the tube.
Dem Problem kann abgeholfen werden, indem ein fertiges Gewindestück auf ein gewindefreies Außenrohr aufgeschweißt wird. Die dabei entstehende Schweißnaht kann jedoch eine Schwachstelle der Teleskopstütze darstellen. Weiterhin muss die Schweißnaht nachbehandelt werden, um einen ausreichenden Korrosionsschutz zu gewährleisten. Die
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren zur Festigung und Kalibrierung zumindest eines Rohrabschnittes eines Außenrohrs einer Teleskopstütze bereitzustellen.Object of the present invention is therefore to provide a method for strengthening and calibrating at least one pipe section of an outer tube of a telescopic support.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Verfahrensschritten des Anspruch 1 gelöst. Die Unteransprüche geben bevorzugte Weiterbildungen wieder.This object is achieved by a method with the method steps of claim 1. The dependent claims give preferred developments again.
Die Aufgabe wird somit erfindungsgemäß durch ein Verfahren zur Verfestigung und Kalibrierung zumindest eines Rohrabschnittes eines Außenrohrs einer Teleskopstütze für den Baubereich mit den aufeinander folgenden Schritten gelöst:
- a) Aufschieben eines Rings auf den Rohrabschnitt, wobei der Innendurchmesser des Rings dem Außendurchmesser des Rohrabschnittes entspricht,
- b) Einschieben eines Stempels in den Rohrabschnitt, wobei der Außendurchmesser des Stempels größer ist als der Innendurchmesser des Rohrabschnittes, sodass der Rohrabschnitt aufgeweitet wird,
- c) Herausziehen des Stempels aus dem Rohrabschnitt,
- d) Überziehen des aufgeweiteten Rohrabschnitts mit dem Ring, sodass der aufgeweitete Rohrabschnitt wieder auf seinen ursprünglichen Außendurchmesser verjüngt wird,
- a) pushing on a ring on the pipe section, wherein the inner diameter of the ring corresponds to the outer diameter of the pipe section,
- b) inserting a stamp into the pipe section, wherein the outer diameter of the stamp is greater than the inner diameter of the pipe section, so that the pipe section is widened,
- c) pulling the stamp out of the pipe section,
- d) coating the expanded pipe section with the ring so that the expanded pipe section is rejuvenated to its original outer diameter,
Schritt b) wird nach Schritt a) oder gleichzeitig mit Schritt a) durchgeführt. Die Schritte c) und d) werden nach den Schritten a) und b) durchgeführt.Step b) is carried out after step a) or simultaneously with step a). Steps c) and d) are carried out after steps a) and b).
Das erfindungsgemäße Verfahren kann auf das gesamte Rohr oder einen Rohrabschnitt angewendet werden. Der Stempel kann dabei vollständig durch das Rohr geschoben werden. Vorzugsweise wird der Stempel lediglich abschnittsweise in einen Rohrabschnitt eingeschoben und wieder herausgezogen. Besonders bevorzugt wird der Stempel ca. 300mm in das Rohr eingeschoben.The method according to the invention can be applied to the entire pipe or a pipe section. The stamp can be pushed completely through the pipe. Preferably, the stamp is only partially inserted into a pipe section and pulled out again. Particularly preferably, the stamp is inserted about 300mm into the tube.
Das in dem Verfahren eingesetzte Rohr wird somit von einem Stempel bzw. Dorn aufgeweitet, der von innen in das Rohr eingeführt wird. Beim Aufweiten des Rohrabschnittes wird das Rohr vorzugsweise um ca. 1mm aufgeweitet, d.h. der Außendurchmesser nimmt durch das Aufweiten um ca. 1mm zu. Bei der Aufweitung des Rohres entsteht eine Gefügeänderung, die eine Festigung des aufgeweiteten Rohrabschnittes bewirkt. Weiterhin erfolgt durch das Einschieben des Stempels eine Kalibrierung des Innendurchmessers des aufgeweiteten Rohrabschnittes. Der Innendurchmesser des Rohrabschnittes wird dabei auf den Außendurchmesser des Stempels geformt.The tube used in the method is thus expanded by a punch or mandrel, which is inserted from the inside into the tube. When expanding the pipe section, the pipe is preferably expanded by about 1mm, i. The outer diameter increases by the expansion by about 1mm. When expanding the tube creates a structural change that causes a consolidation of the expanded pipe section. Furthermore, by inserting the stamp, a calibration of the inner diameter of the expanded pipe section. The inner diameter of the pipe section is thereby formed on the outer diameter of the punch.
Um das Einführen des Stempels zu erleichtern, kann ein Stempel verwendet werden, der eine erste Fase bzw. Rundung zwischen seiner zuerst in das Rohr eindringenden Vorderseite und seiner an der Innenseite des Rohrabschnittes anliegenden Außenseite aufweist.In order to facilitate the insertion of the stamp, a punch can be used, which has a first bevel or rounding between its first entering the pipe front and its voltage applied to the inside of the pipe section outside.
Weiterhin kann das Herausziehen des Stempels aus dem Rohr erleichtert werden, wenn ein Stempel verwendet wird, der eine zweite Fase bzw. Rundung zwischen seiner an der Innenseite des Rohrabschnittes anliegenden Außenseite und seiner der Vorderseite gegenüberliegenden Rückseite aufweist.Furthermore, the extraction of the punch from the tube can be facilitated if a punch is used, which has a second bevel or rounding between its voltage applied to the inside of the pipe section outside and its front side opposite the rear side.
Das Einführen des Stempels wird vorzugsweise bei Zimmertemperatur durchgeführt, sodass eine Kaltverformung bzw. Kaltumformung des aufgeweiteten Rohrabschnittes erfolgt.The insertion of the stamp is preferably carried out at room temperature, so that a cold deformation or cold forming of the expanded pipe section takes place.
Eine weitere Festigung des Rohres und eine Kalibrierung des Außendurchmessers des im Verfahren behandelten Rohrabschnittes erfolgt dadurch, dass nach dem Aufweiten des Rohrabschnittes das Rohr zumindest abschnittsweise von dem Ring überzogen wird, dessen Innendurchmesser kleiner ist als der Außendurchmesser des aufgeweiteten Rohrabschnittes. Der aufgeweitete Rohrabschnitt wird dabei durch die Innenseite des Rings verjüngt, der über den aufgeweiteten Rohrabschnitt gezogen wird. Hierbei erfolgt eine Gefügeänderung des verjüngten Rohrabschnittes. Durch den kalibrierten Außendurchmesser kann besonders gut ein Außengewinde auf das Rohr aufgebracht werden.A further consolidation of the tube and a calibration of the outer diameter of the treated in the process pipe section takes place in that after the expansion of the pipe section, the tube is at least partially covered by the ring whose inner diameter is smaller than the outer diameter of the expanded pipe section. The expanded pipe section is thereby tapered by the inside of the ring, which is pulled over the expanded pipe section. In this case, a structural change of the tapered pipe section takes place. Due to the calibrated outer diameter, an external thread can be applied to the pipe particularly well.
Das Ziehen des Rings über die Außenseite des aufgeweiteten Rohrabschnittes wird vorzugsweise bei Zimmertemperatur durchgeführt, sodass eine Kaltverformung des jetzt verjüngten Rohrabschnittes erfolgt.The drawing of the ring over the outside of the expanded pipe section is preferably carried out at room temperature, so that a cold deformation of the now tapered pipe section takes place.
Es wird ein Ring verwendet, dessen Innendurchmesser im Wesentlichen dem Außendurchmesser des Rohrabschnittes vor der Aufweitung durch den Stempel entspricht. Hierdurch kann im Ergebnis ein Rohr bzw. Rohrabschnitt gefertigt werden, dessen Außendurchmesser nach Durchführung des erfindungsgemäßen Verfahrens dem Außendurchmesser vor Durchführung des erfindungsgemäßen Verfahrens entspricht. Wird das erfindungsgemäße Verfahren nur an einem Rohrabschnitt durchgeführt, so kann ein Rohr mit gleichbleibendem Außendurchmesser an dem behandelten und dem nicht behandelten Rohrabschnitt des Rohres erzielt werden. Gleichzeitig ist jedoch der behandelte Rohrabschnitt verfestigt und sein Außendurchmesser kalibriert bzw. die Rundheit verbessert.It is used a ring whose inner diameter substantially corresponds to the outer diameter of the pipe section before expansion by the punch. As a result, as a result, a pipe or pipe section can be produced, the outer diameter of which, after carrying out the method according to the invention, corresponds to the outer diameter before carrying out the method according to the invention. If the method according to the invention is carried out only on one pipe section, then a pipe with a constant outside diameter can be achieved on the treated and untreated pipe sections of the pipe. At the same time, however, the treated pipe section is solidified and its outer diameter is calibrated or the roundness is improved.
Die Toleranz des Außendurchmessers kann dabei von typischerweise ±0,3mm auf ±0,15mm, verbessert werden.The tolerance of the outer diameter can be improved from typically ± 0.3mm to ± 0.15mm.
Das Verfahren wird an dem Rohr besonders einfach durchgeführt, da der Ring vor dem Einschieben des Stempels auf das Rohr aufgeschoben und der Stempel nach dessen Einführen in das Rohr aus dem Rohr herausgezogen wird. Das Verfahren weist somit folgende Schritte auf:
- a) Aufschieben des Rings auf das Rohr;
- b) Einschieben des Stempels in das Rohr, wobei ein Rohrabschnitt aufgeweitet wird;
- c) Herausziehen des Stempels aus dem Rohr;
- d) Überziehen des aufgeweiteten Rohrabschnittes mit dem Ring, wobei der aufgeweitete Rohrabschnitt wieder verjüngt wird.
- a) pushing the ring onto the pipe;
- b) inserting the stamp in the tube, wherein a pipe section is widened;
- c) pulling the punch out of the tube;
- d) coating the flared pipe section with the ring, wherein the expanded pipe section is rejuvenated.
Der Stempel und der Ring werden vorzugsweise in einem festen Abstand zueinander geführt. Hierdurch kann eine Vorrichtung zur Durchführung des Verfahrens konstruktiv einfach ausgebildet werden. Stempel und Ring können dabei beispielsweise an einer gemeinsamen Halterung angeordnet sein. Alternativ dazu können Stempel und Ring einteilig ausgebildet sein. Der Ring wird dabei vorzugsweise ca. 20mm vor dem Stempel geführt.The punch and the ring are preferably guided at a fixed distance from each other. In this way, a device for carrying out the method can be constructed structurally simple. Stamp and ring can be arranged, for example, on a common bracket. Alternatively, punch and ring may be integrally formed. The ring is preferably performed about 20mm in front of the stamp.
Auf den gefestigten und kalibrierten Rohrabschnitt wird ein Gewinde aufgebracht. Das Gewinde wird, insbesondere in Form eines Außengewindes, aufgerollt. Hierdurch kann das behandelte Rohr als Außenrohr einer Teleskopstütze im Baubereich eingesetzt werden.A thread is applied to the consolidated and calibrated tube section. The thread is, especially in the form of an external thread, rolled up. As a result, the treated pipe can be used as the outer tube of a telescopic support in the construction sector.
Auf den behandelten Rohrabschnitt wird besonders bevorzugt ein Gewinde in Form eines Trapezgewindes mit einem Flankenwinkel von weniger als 15°, insbesondere 10°, gerollt. Durch den kleinen Flankenwinkel kann eine sehr hohe Last auf das Gewinde übertragen werden.On the treated pipe section is particularly preferably a thread in the form of a trapezoidal thread with a flank angle of less than 15 °, in particular 10 °, rolled. Due to the small flank angle, a very high load can be transferred to the thread.
Zur Durchführung des Verfahrens kann ein Rohr in Form eines verzinkten Stahlrohres verwendet werden. Nach Durchführung des Verfahrens weist ein solches Rohr zumindest einen behandelten Rohrabschnitt mit hoher Stabilität, Maßhaltigkeit und Korrosionsbeständigkeit auf. Verzinkte Stahlrohre werden mit standardisierten Durchmessern in großen Mengen hergestellt und können dadurch preiswert bezogen werden.To carry out the method, a tube in the form of a galvanized steel tube can be used. After carrying out the method, such a pipe has at least one treated pipe section with high stability, dimensional stability and corrosion resistance. Galvanized steel tubes are manufactured in standardized quantities in large quantities and can be obtained inexpensively.
Die Vorteile des erfindungsgemäßen Verfahrens kommen besonders gut zum Tragen, wenn ein Rohr mit einem Außendurchmesser von mehr als 60mm und einer Wandstärke von weniger als 3mm, insbesondere mit einer Wandstärke von weniger als 2,7mm, zur Durchführung des Verfahrens verwendet wird. In diesem Fall können auch auf diese Rohre Gewinde aufgerollt werden.The advantages of the method according to the invention are particularly useful when a pipe with an outside diameter of more than 60 mm and a wall thickness of less than 3 mm, in particular with a wall thickness of less than 2.7 mm, is used to carry out the method. In this case, threads can also be rolled up on these tubes.
Die Erfindung betrifft somit ein Verfahren zur Herstellung eines Außenrohrs einer Teleskopstütze für den Baubereich, wobei zumindest ein Rohrabschnitt des Außenrohrs mit einem zuvor beschriebenen Verfahren behandelt wird. Kein Teil der Erfindung ist eine Vorrichtung zur Durchführung eines zuvor beschriebenen Verfahrens, mit einer Spannvorrichtung zur festen Aufnahme eines Rohres, einem im Querschnitt runden Stempel, der in Längsrichtung eines eingespannten Rohres in das Rohr einpressbar ist und einem Ring, der in Längsrichtung des eingespannten Rohres über die Außenseite des Rohres ziehbar ist.The invention thus relates to a method for producing an outer tube of a telescopic support for the construction sector, wherein at least one pipe section of the outer pipe is treated by a method described above. No part of the invention is a device for carrying out a method described above, comprising a clamping device for firmly receiving a tube, a round cross-section punch which can be pressed into the tube in the longitudinal direction of a clamped tube and a ring in the longitudinal direction of the clamped tube can be pulled over the outside of the tube.
Vorzugsweise weist der Ring dabei - bis auf eine oder zwei endseitige Fasen - einen konstanten Innendurchmesser auf. Hierdurch ist der Ring konstruktiv einfach und kostengünstig herstellbar und ermöglicht darüber hinaus die Herstellung einer qualitativ besonders hochwertigen Außenoberfläche des bearbeiteten Rohrabschnittes.Preferably, the ring has - except for one or two end chamfers - a constant inner diameter. As a result, the ring is structurally simple and inexpensive to produce and also allows the production of a particularly high quality outer surface of the machined pipe section.
Der Stempel ist vorzugsweise zusammen mit dem Ring entlang der Längsachse eines eingespannten Rohres bewegbar. Hierdurch kann eine Steuerung des mit der Vorrichtung ausgeführten Verfahrens vereinfacht werden.The punch is preferably movable together with the ring along the longitudinal axis of a clamped tube. As a result, a control of the method carried out with the device can be simplified.
In besonders bevorzugter Ausgestaltung ist der Stempel mit dem Ring verbunden. Die Vorrichtung ist dadurch konstruktiv besonders einfach ausführbar. Vorzugsweise ist die Verbindung zwischen Stempel und Ring unmittelbar und starr. Ebenfalls kein Teil der Erfindung ist ein Außenrohr einer Teleskopstütze für den Baubereich, wobei das Außenrohr einstückig mit durchgehendem Außendurchmesser ausgebildet ist und zumindest abschnittsweise ein auf seine äußere Mantelfläche aufgerolltes Außengewinde und/oder ein auf seine innere Mantelfläche aufgerolltes Innengewinde aufweist, wobei das Verhältnis des Außendurchmessers des Außenrohrs zur Wandstärke des Außenrohrs größer als 26,2 ist.In a particularly preferred embodiment, the stamp is connected to the ring. The device is structurally particularly simple executable. Preferably, the connection between the punch and ring is immediate and rigid. Also no part of the invention is an outer tube of a telescopic support for the construction sector, wherein the outer tube is integrally formed with a continuous outer diameter and at least partially has a rolled onto its outer surface external thread and / or rolled up on its inner circumferential surface internal thread, wherein the ratio of the outer diameter of the outer tube to the wall thickness of the outer tube is greater than 26.2.
Einstückige Außenrohre von Teleskopstützen mit durchgehendem Außendurchmesser und einem so großen Außendurchmesser-zu-Wandstärke-Verhältnis sind sowohl sehr leicht als auch äußerst stabil. Die Herstellung solcher Außenrohre kann zumindest teilweise durch das zuvor beschriebene erfindungsgemäße Verfahren erfolgen. Das Außenrohr besteht vorzugsweise aus verzinktem Stahl. Verzinkter Stahl ist korrosionsbeständig, stabil und vergleichsweise kostengünstig.One-piece outer tubes of telescopic posts with a continuous outer diameter and such a large outer diameter to wall thickness ratio are both very light and extremely stable. The production of such outer tubes can be carried out at least partially by the method according to the invention described above. The outer tube is preferably made of galvanized steel. Galvanized steel is corrosion resistant, stable and comparatively inexpensive.
In besonders bevorzugter Ausgestaltung ist der Außendurchmesser des Außenrohres größer als 60,3mm, d.h. es ist für Lasten über 30kN geeignet. Das Außenrohr ist dadurch besonders stabil und leicht ausgebildet. Die Querschnittsfläche des Außenrohres ist dabei vorzugsweise stets größer als 419mm2. Ebenfalls kein Teil der Erfindung ist eine Teleskopstütze für den Baubereich mit einem zuvor beschriebenen Außenrohr und einem axial darin verschiebbar angeordneten Innenrohr.In a particularly preferred embodiment, the outer diameter of the outer tube is greater than 60.3mm, ie it is suitable for loads over 30kN. The outer tube is therefore particularly stable and easily formed. The cross-sectional area of the outer tube is preferably always greater than 419 mm 2 . Also not part of the invention is a telescopic support for the construction sector with a previously described outer tube and axially displaceably arranged therein inner tube.
Bei der Teleskopstütze kann ein Anschlagelement im Bereich eines Endes des Außenrohres vorgesehen sein, wobei das Anschlagelement die freie Querschnittsfläche des Außenrohrs zumindest teilweise verdeckt. Unter Verdecken der Querschnittsfläche wird in der vorliegenden Anmeldung dabei auch ein zumindest teilweises Vorstehen des Anschlagelements in den lichten Querschnitt des Außenrohres verstanden. Der Vorteil besteht im Wesentlichen darin, dass das Anschlagselement auf einfache Weise an dem Außenrohr angeordnet werden kann, ohne dass hierzu eine aufwändige Veränderung des Innenquerschnitts des Außenrohres bzw. ein Anschweißen von separaten Rohrstücken erforderlich ist. Je nach der gewählten Befestigungsart kann dabei eine robuste und gegenüber axial angreifenden Kräften hoch belastbare Ausziehbegrenzung des Innenrohrs verwirklicht werden. Das Anschlagelement ist nach der Erfindung vorzugsweise ohne separate Verbindungsmittel an dem Außenrohr befestigt und im einfachsten Fall lediglich im Presssitz an bzw. in dem Außenrohr angeordnet. Das Anschlagelement kann aber auch im Sinne eines Sprengrings in einer an dem Außenrohr angeordneten Nut bzw. über eine Rastverbindung oder eine bajonettverschlussartige Befestigung an dem Außenrohr angeordnet sein. Das Anschlagelement ist mit dem Außenrohr verbunden und dies im Bereich des freien Endes des Außenrohrs.In the telescopic support, a stop element may be provided in the region of one end of the outer tube, wherein the stop element at least partially obscures the free cross-sectional area of the outer tube. Covering the cross-sectional area in the present application also means an at least partial projection of the stop element into the clear cross-section of the outer tube. The advantage consists essentially in the fact that the stop element can be easily arranged on the outer tube, without the need for a complex change of the inner cross section of the outer tube or a welding of separate pipe sections is required. Depending on the selected type of fastening, a robust pull-out limiter of the inner tube, which is highly load-bearing against axially acting forces, can be realized. The stop element is preferably attached according to the invention without separate connection means on the outer tube and arranged in the simplest case only in a press fit on or in the outer tube. However, the stop element can also be arranged in the sense of a snap ring in a groove arranged on the outer tube or via a latching connection or a bayonet-type fastening to the outer tube. The stop element is connected to the outer tube and this in the region of the free end of the outer tube.
Nach einer bevorzugten Weiterbildung greift das Anschlagelement in ein an einer Mantelfläche des Außenrohrs angeordnetes Innen- und/oder Außengewinde des Außenrohrs ein, wobei eine besonders belastbare Anordnung des Anschlagselements dadurch erreicht wird, dass das Anschlagselement mit einem Außen- und/oder einem Innengewinde in das bzw. in die korrespondierenden Gewinde des Außenrohrs eingreift.
Zwecks Sicherung des Anschlagelements gegenüber einem unbeabsichtigten Lösen aus seiner Montageposition hat es sich dabei in der Praxis als vorteilhaft erwiesen, dass dem Anschlagelement eine Ausdrehsicherung zugeordnet ist. Die Ausdrehsicherung kann dabei insbesondere eine an dem Anschlagelement angeordnete und in das Gewinde des Außenrohrs einschlag bare Sicherungslasche aufweisen. Das Anschlagelement, hier eine Einschlaglasche, greift in eine Durchtrittsöffnung des Außenrohrs.
Die Belastbarkeit des Anschlagselements gegenüber axialen Belastungen, wie diese insbesondere bei einem Einschieben eines verschmutzten Innenrohrs in das Außenrohr auftreten können, wird dadurch weiter verbessert, dass das Anschlagelement eine Stirnfläche, d.h. einen stirnseitigen Wandungsabschnitt, des einen Endes des Außenrohres zumindest teilweise überdeckt.According to a preferred embodiment, the stop element engages in an arranged on a lateral surface of the outer tube inner and / or outer thread of the outer tube, wherein a particularly resilient arrangement of the stop member is achieved in that the stop element with an external and / or internal thread into the or engages in the corresponding thread of the outer tube.
In order to secure the stop element against unintentional release from its mounting position, it has proven to be advantageous in practice that the stop element is assigned a Ausdrehsicherung. The Ausdrehsicherung may in particular have a arranged on the stop element and einschlag in the thread of the outer tube bare locking tab. The stop element, here an impact flap, engages in a passage opening of the outer tube.
The load capacity of the stop member against axial loads, as may occur in particular when a soiled inner tube in the outer tube, is further improved in that the stop element at least partially covers an end face, ie an end wall portion of one end of the outer tube.
Das Anschlagelement ist nach einer Ausführungsform vorzugsweise als Kappe oder als Hülse ausgebildet. Dadurch kann einerseits einem Eindringen von Verunreinigungen, beispielsweise Frischbeton, in das Innere des Außenrohres entgegengewirkt werden, was für eine wartungsarme und zuverlässige Funktion günstig ist. Andererseits kann das Anschlagelement dadurch als (Gleit-) Lager und zugleich als Abstreifelement für ein verunreinigtes Innenrohr dienen. Ist das Anschlagselement als Kappe oder als Hülse ausgebildet, so muss zur Schaffung eines Anschlagselements am Außenrohr keine zusätzliche Bearbeitung erfolgen.The stop element is preferably formed according to an embodiment as a cap or as a sleeve. As a result, on the one hand penetration of impurities, such as fresh concrete, can be counteracted in the interior of the outer tube, which is favorable for a low-maintenance and reliable function. On the other hand, the stop element thereby serve as a (sliding) bearing and at the same time as a stripping element for a contaminated inner tube. Is this Stop element designed as a cap or as a sleeve, it must be done to create a stop element on the outer tube no additional processing.
Zwecks einer von der Orientierung des Innenrohrs in dem Außenrohr unabhängigen Funktion der Ausfallsicherung ist das Anschlagmittel des Innenrohrs vorzugsweise als aufgeweitetes, beispielsweise aufgebördeltes, Ende des Innenrohrs ausgebildet. Dadurch kann das Innenrohr selbst bei sehr großen angreifenden Kräften, wie diese in der Praxis auftreten können, nicht aus dem Außenrohr entfernt werden.For the purpose of a function of the failsafe independent of the orientation of the inner tube in the outer tube of the stop means of the inner tube is preferably formed as a flared, for example crimped, end of the inner tube. As a result, the inner tube can not be removed from the outer tube even with very large forces acting on it, as can occur in practice.
Damit das Anschlagelement selbst unter hohen Biegemomenten des ausgezogenen Innenrohrs nicht aus seiner montierten Position gelöst werden kann, weist das Innenrohr nach einer Weiterbildung wenigstens einen radialwärts über seine Außenmantelfläche seitlich vorstehenden Vorsprung auf, der von dem aufgeweiteten Ende des Innenrohrs, dem Anschlagmittel, axial beabstandet angeordnet ist. Der Vorsprung ist dabei vorzugsweise einstückig mit dem Innenrohr ausgebildet und insbesondere über einen Umformprozess am Innenrohr gefertigt. Der Vorsprung ist vorteilhafterweise in Gestalt einer Noppe oder eines Sickenvorsprung ausgebildet und kann sich in Umfangsrichtung des Innenrohrs über einen vorzugsweise großen Umfangswinkel erstrecken. Nach einer Ausführungsform können auch mehrere Vorsprünge vorgesehen sein, die entlang des äußeren Umfangs des Innenrohrs zueinander beabstandet aufgereiht sind und die vorzugsweise in einer zur Längsachse des Innenrohrs orthogonal angeordneten Ebene angeordnet sind.So that the stop element can not be released from its mounted position even under high bending moments of the extended inner tube, the inner tube according to a development at least one radially over its outer lateral surface laterally projecting projection on the flared end of the inner tube, the stop means arranged axially spaced is. The projection is preferably formed integrally with the inner tube and made in particular via a forming process on the inner tube. The projection is advantageously formed in the form of a nub or a bead projection and may extend in the circumferential direction of the inner tube over a preferably large circumferential angle. According to one embodiment, a plurality of projections may be provided, which are lined up along the outer circumference of the inner tube spaced from each other and which are preferably arranged in a plane orthogonal to the longitudinal axis of the inner tube level.
Das Innenrohr ist zwecks einer verbesserten Positioniergenauigkeit sowie eines zuverlässigen Stützverhaltens an dem Anschlagelement und/oder an einer Innenmantelfläche des Außenrohres, vorzugsweise im Gleitspiel-Formschluss, axial geführt. Dabei ist das Innenrohr an der Innenmantelfläche des Außenrohrs zweckmäßiger Weise mit dem einen Anschlagsmittel, hier beispielsweise mit dem aufgebördelten Rand seines in dem Außenrohr angeordneten Endes, und/oder mit dem wenigstens einen Vorsprung geführt.The inner tube is for the purpose of improved positioning accuracy and a reliable support behavior on the stop element and / or on an inner circumferential surface of the outer tube, preferably in Gleitspiel positive connection, axially guided. In this case, the inner tube on the inner circumferential surface of the outer tube expedient manner with the one stop means, here for example with the crimped edge of its arranged in the outer tube end, and / or out with the at least one projection.
Das vorzugsweise als Kappe ausgebildete Anschlagelement weist nach einer unter fertigungstechnischen Aspekten besonders bevorzugten Weiterbildung ein Innengewinde auf, das in ein Außengewinde des Außenrohrs eingreift, wobei das Außengewinde zusätzlich mit einem Innengewinde einer Absenkmutter im Eingriff steht, an der ein quer zur Längsachse der Teleskopstütze durch das Außen- und Innenrohr führbarer Sicherungsbolzen abstützbar ist. Dadurch ist einerseits eine Feineinstellung der funktionellen Gesamtlänge der Teleskopstütze sowie ein erleichtertes Ausschalen möglich, andererseits kann das Anschlagelement unmittelbar auf ein ohnehin vorgesehenes Gewinde aufgeschraubt werden. Das Anschlagelement fungiert dabei zugleich im Sinne einer Kontermutter bzw. eines Anschlagelements für die Absenkmutter, so dass diese unverlierbar an der Teleskopstütze angeordnet ist.The trained preferably as a cap stop element has, according to a particularly preferred manufacturing under aspects of development an internal thread which engages in an external thread of the outer tube, wherein the external thread is additionally engaged with an internal thread of a lowering nut on which a transverse to the longitudinal axis of the telescopic support by the Outer and inner tube feasible securing bolt can be supported. As a result, on the one hand a fine adjustment of the overall functional length of the telescopic support and a simplified stripping possible, on the other hand, the stop element can be screwed directly onto an already provided thread. The stop element acts at the same time in the sense of a lock nut or a stop element for the lowering nut, so that it is arranged captive on the telescopic support.
Im Hinblick auf eine besonders kostengünstige Fertigung der Teleskopstütze weist das Außenrohr vorzugsweise über seine gesamte axiale Länge einen im Wesentlichen gleichbleibenden Innendurchmesser auf.With regard to a particularly cost-effective production of the telescopic support, the outer tube preferably has a substantially constant inner diameter over its entire axial length.
Im Falle eines zumindest abschnittsweisen Aufweitens des Außenrohrs durch den Stempel kann das Außenrohr jedoch auch einen abschnittsweise aufgeweiteten Innendurchmesser aufweisen.In the case of an at least partially widening of the outer tube by the punch, however, the outer tube may also have a sectionally widened inner diameter.
Insgesamt hat die beschriebene Baustütze (Teleskopstütze) den Vorteil, dass sie einfachst zu montieren (Endmontage) ist. Das Außen- wie auch Innenrohr können ohne Zusatzelemente bearbeitet und hergestellt werden und erst beim Zusammenfügen des Außen- und Innenrohrs wird die Absenkmutter mit den damit verbundenen Elementen auf das Außenrohr aufgeschraubt. Ebenfalls wird vor dem Zusammenfügen des Innenrohrs mit dem Außenrohr der Sicherungsbolzen am Außenrohr angebracht. Ist die Baustütze zusammengefügt, kann der Sicherungsbolzen nur noch im Bereich der Durchstecköffnung verwendet werden, sofern das Anschlagelement einen Außendurchmesser aufweist, der größer ist, als die lichte Weite eines das Außenrohr umfassenden Abschnitts des entsprechend geformten Sicherungsbolzens.Overall, the described prop (telescopic support) has the advantage that it is easy to assemble (final assembly). The outer and inner tube can be edited and manufactured without additional elements and only when assembling the outer and inner tube, the lowering nut is screwed with the associated elements on the outer tube. Also, the fuse pin is attached to the outer tube prior to assembly of the inner tube with the outer tube. If the prop is joined together, the securing bolt can only be used in the region of the insertion opening, provided that the stop element has an outer diameter which is greater than the inside diameter of a portion of the correspondingly shaped securing bolt comprising the outer tube.
Weitere Merkmale und Vorteile des erfindungsgemäßen Verfahrens ergeben sich aus der nachfolgenden detaillierten Beschreibung eines Ausführungsbeispiels, anhand der Figuren der Zeichnung, die erfindungswesentliche Einzelheiten zeigt sowie aus den Ansprüchen.Further features and advantages of the method according to the invention will become apparent from the following detailed description of an embodiment, with reference to the figures of the drawing, the essential features of the invention shows and from the claims.
Die in der Zeichnung dargestellten Merkmale sind nicht notwendigerweise maßstäblich zu verstehen und derart dargestellt, dass die erfindungsgemäßen Besonderheiten deutlich sichtbar gemacht werden können. Die verschiedenen Merkmale können im Rahmen der Erfindung, wie in den Ansprüchen definiert, je einzeln für sich oder zu mehreren in beliebigen Kombinationen bei Varianten der Erfindung verwirklicht sein.The features illustrated in the drawing are not necessarily to scale and illustrated in such a way that the features of the invention can be made clearly visible. The various features may be realized within the scope of the invention as defined in the claims, individually for themselves or for a plurality of combinations in variants of the invention.
In der schematischen Zeichnung ist ein Ausführungsbeispiel einer Teleskopstütze mit einem Außenrohr sowie ein Teil des Herstellungsprozesses des Außenrohrs dargestellt und in der nachfolgenden Beschreibung näher erläutert.In the schematic drawing, an embodiment of a telescopic support with an outer tube and a part of the manufacturing process of the outer tube is shown and explained in more detail in the following description.
Es zeigen:
- Fig. 1
- eine perspektivische Ansicht einer ausschnittsweise dargestellten, nicht-erfindungsgemäßen Teleskopstütze mit einem Außenrohr und einem als Kappe ausgebildeten Anschlagselement;
- Fig. 2
- ausschnittsweise einen Längsschnitt durch eine der
Fig. 1 entsprechende Teleskopstütze; - Fig. 3
- eine perspektivische Ansicht der Kappe aus
Fig. 1 ; - Fig. 4
- eine Schnittdarstellung der in
Fig. 3 gezeigten Kappe; - Fig. 5
- die Einzelteile der nicht-erfindungsgemäßen Teleskopstütze vor dem Zusammenfügen des Innenrohrs mit dem Außenrohr; und
- Fig. 6a
- eine geschnittene Seitenansicht einer Vorrichtung zur Herstellung des Außenrohrs in einer ersten Stellung;
- Fig. 6b
- die Vorrichtung zur Herstellung des Außenrohrs in einer zweiten Stellung;
- Fig. 6c
- die Vorrichtung zur Herstellung des Außenrohrs in einer dritten Stellung;
- Fig. 6d
- die Vorrichtung zur Herstellung des Außenrohrs in einer vierten Stellung;
- Fig. 6e
- das Außenrohr aus
Fig. 6d mit einem Gewinde; und - Fig. 6f
- einen Ausschnitt aus
Fig. 6e .
- Fig. 1
- a perspective view of a fragmentary illustrated, non-inventive telescopic support with an outer tube and a stopper formed as a cap;
- Fig. 2
- partially a longitudinal section through one of
Fig. 1 corresponding telescopic support; - Fig. 3
- a perspective view of the cap
Fig. 1 ; - Fig. 4
- a sectional view of in
Fig. 3 shown cap; - Fig. 5
- the items of non-inventive telescopic support prior to assembly of the inner tube with the outer tube; and
- Fig. 6a
- a sectional side view of an apparatus for producing the outer tube in a first position;
- Fig. 6b
- the device for producing the outer tube in a second position;
- Fig. 6c
- the device for producing the outer tube in a third position;
- Fig. 6d
- the device for producing the outer tube in a fourth position;
- Fig. 6e
- the outer tube off
Fig. 6d with a thread; and - Fig. 6f
- a section from
Fig. 6e ,
In
An einem kopfseitigen, d.h. der Tragplatte 18 des Innenrohrs 14 zugewandten, Ende 20 des Außenrohrs 12 ist eine Kappe 22 angeordnet, die als Anschlagelement für das Innenrohr 14 dient und durch die ein axiales Entfernen bzw. ein Ausfallen des Innenrohrs 14 aus dem Außenrohr 12 verhindert ist.At a head end, i. the
Die Kappe 22 ist in einer zu einer Überwurfmutter entsprechenden Weise ausgebildet und weist einen im Wesentlichen zylindrischen Wandabschnitt 24 mit einem Innengewinde 26 auf. An den zylindrischen Wandabschnitt 24 schließt sich ein in der Fig. oberhalb des zylindrischen Wandabschnitts 24 angeordneter Randbereich 28 der Kappe 22 an, der gegenüber dem zylindrischen Wandbereich 24 radial in Richtung auf eine Längsachse 30 der Teleskopstütze 10 hin abgewinkelt ist und der eine freie Querschnittsfläche 32 des Außenrohrs 12 teilweise überdeckt.The
Die Kappe 22 bzw. deren Innengewinde 26 befindet sich im Eingriff mit einem auf der äußeren Mantelfläche 34 des Außenrohrs 12 angeordneten Außengewinde 36. In das Außengewinde 36 des Außenrohrs 12 greift zugleich eine sogenannte Absenkmutter 38 ein, an der eine Handhabe 38' verschwenkbar angeordnet ist und die durch Verdrehen um die Längsachse 30 der Teleskopstütze 10 axial an dem Außenrohr 12 entlang bewegbar ist.The
An der Absenkmutter 38 ist ein quer zur Längsachse 30 der Teleskopstütze 10 durch das Außen- und Innenrohr 12, 14 gesteckter Sicherungsbolzen 40 abgestützt. Das Außenrohr 12 weist diesbezüglich zwei einander gegenüberliegende und parallel zur Längsachse 30 der Teleskopstütze 10 längserstreckte erste Durchstecköffnungen (Langlöcher) 42 auf, während das Innenrohr 14 eine Mehrzahl kreisförmiger einander gegenüberliegender (fluchtend) zweiter Durchstecköffnungen 44 aufweist, die längs des Innenrohrs 14 in jeweils zueinander regelmäßigen Abständen unter- bzw. übereinander angeordnet sind.At the lowering
Zur ungefähren Längeneinstellung der Teleskopstütze 10 wird das Innenrohr 14 zunächst bis zu einer gewünschten Länge der Teleskopstütze 10 ausgezogen und der Sicherungsbolzen 40 nachfolgend durch die ersten Durchstecköffnungen 42 des Außenrohrs sowie mit diesen jeweils fluchtenden zweiten Durchstecköffnungen 44 des Innenrohrs14 gesteckt.For approximate length adjustment of the
Durch Verdrehen der in der Fig. unterhalb des Sicherungsbolzens 40 angeordneten Absenkmutter 38 kann nachfolgend deren relative Position längs des Außenrohres 12 stufenlos verändert werden. Dadurch kann zugleich die axiale Abstützposition des Sicherungsbolzens 40 an dem Außenrohr 12 bzw. des mit diesem gekoppelten Innenrohrs 14 längs des Außenrohrs 12, d.h. die Länge der Teleskopstütze 10, bedarfsgerecht feinreguliert werden.By rotating the lowering
Wie insbesondere aus der
Das Innenrohr 14 weist zusätzlich mehrere noppenartige Vorsprünge 50 auf, die zu dem Anschlagmittel (aufgeweitetes Ende) 48 des Innenrohrs 14 beabstandet angeordnet sind und die radialwärts über eine Außenmantelfläche 34 des Innenrohrs 14 seitlich vorstehen. Die noppenartigen Vorsprünge 50 sind bei Erreichen einer vorbestimmten maximalen Auszugsweite des Innenrohrs 14 an der Kappe 22 zur Anlage gebracht und erzwingen so eine im Außenrohr 12 verbleibende Mindestlänge des Innenrohrs 14. Bei auftretenden Biegemomenten stützt sich das Innenrohr 14 daher an einer Innenmantelfläche 52 des Außenrohrs 12 ab, wodurch ein Abhebeln der Kappe 22 von dem Außenrohr 12 sicher vermieden wird.The
Die noppenartigen Vorsprünge 50 haben eine Funktion wie das Anschlagmittel 48 und begrenzen die Teleskopierlänge der Teleskopstütze.The knob-
Das Innengewinde 26 der Kappe 22 ist, wie in den
Aus der Darstellung in der
In der
Das Außenrohr 12 ist in
The
Außendurchmesser von über 60,3mm, insbesondere von 71mm, 76,5mm, 83mm oder 83,5mm, und einer Wandstärke von 2,6mm handeln. Das Außenrohr ist rechts in einer Spannvorrichtung (nicht gezeigt) der Vorrichtung 60 eingespannt.Outer diameter of about 60.3mm, in particular of 71mm, 76.5mm, 83mm or 83.5mm, and a wall thickness of 2.6mm act. The outer tube is clamped on the right in a tensioning device (not shown) of the
Das Außengewinde 36 (siehe
Die Vorrichtung 60 weist hierfür gemäß
Der Ring 64 weist eine erste Rundung 68 und eine zweite Rundung 70 auf, um besser über das Außenrohr 12 geführt werden zu können.The
Die Vorrichtung 60 in
Durch die Behandlung des ersten Rohrabschnittes 76 kann auf diesen ersten Rohrabschnitt 76 nun problemlos das Außengewinde 36 aufgerollt werden.By treating the
Claims (6)
- Method for reinforcing and calibrating of at least a thin-walled pipe portion (76) of an outer pipe (12) of a telescope-like support (10) for the construction sector, the method being characterised by comprising the steps ofa) Pushing a ring (64) onto the pipe portion (76), whereby the inner diameter of the ring (64) corresponds to the outer diameter of the pipe portion (76),b) Inserting a punch (62) into the pipe portion (76), the outer diameter of the punch (62) being greater than the inner diameter of the pipe portion (76) thus expanding the pipe portion (76),c) Pulling the punch (62) out of the pipe portion (76),d) Covering the expanded pipe portion (76) with the ring (64), thus tapering the expanded pipe portion (64),whereby step d) is performed after step c) or simultaneously with step c), whereby a thread is at least partially rolled on the pipe portion (76) processed by the method.
- Method according to claim 1, characterised in that the punch (62) and the ring (64) are guided with fixed spacing with respect to each other.
- Method according to claim 1 or 2, characterised in that the thread (36) is built as an outer thread.
- Method according to any one of the preceding claims, characterised in that the thread is rolled in the form of a trapezoidal thread having a flank angle of less than 15°, in particular 10°, on the pipe portion (76) processed by the method.
- Method according to any one of the preceding claims, characterised in that a pipe in the form of a zinc-coated steel pipe is used to carry out the method.
- Method according to any one of the preceding claims, characterised in that a pipe having an outer diameter of more than 60 mm and a wall thickness of less than 3 mm, in particular having a wall thickness of less than 2.7 mm, is used to carry out the method.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PL14716337T PL2983845T3 (en) | 2013-04-12 | 2014-04-10 | Method for strengthening and calibrating a pipe segment |
EP17151898.8A EP3199259B1 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
PL17151898T PL3199259T3 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
HRP20171513TT HRP20171513T1 (en) | 2013-04-12 | 2017-10-09 | Method for strengthening and calibrating a pipe segment |
Applications Claiming Priority (2)
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DE102013206577.9A DE102013206577A1 (en) | 2013-04-12 | 2013-04-12 | Method for strengthening and calibrating a pipe section |
PCT/EP2014/057242 WO2014167043A1 (en) | 2013-04-12 | 2014-04-10 | Method for strengthening and calibrating a pipe segment |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP17151898.8A Division EP3199259B1 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
EP17151898.8A Division-Into EP3199259B1 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
Publications (2)
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EP2983845A1 EP2983845A1 (en) | 2016-02-17 |
EP2983845B1 true EP2983845B1 (en) | 2017-07-19 |
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EP14716337.2A Active EP2983845B1 (en) | 2013-04-12 | 2014-04-10 | Method for strengthening and calibrating a pipe segment |
EP17151898.8A Active EP3199259B1 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
Family Applications After (1)
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EP17151898.8A Active EP3199259B1 (en) | 2013-04-12 | 2014-04-10 | Telescopic support and outer tube of a telescopic support |
Country Status (17)
Country | Link |
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US (1) | US10077567B2 (en) |
EP (2) | EP2983845B1 (en) |
CN (1) | CN105121052B (en) |
AR (1) | AR095857A1 (en) |
AU (1) | AU2014253135B2 (en) |
CA (1) | CA2908573C (en) |
DE (1) | DE102013206577A1 (en) |
ES (2) | ES2705598T3 (en) |
HK (1) | HK1212651A1 (en) |
HR (2) | HRP20171513T1 (en) |
HU (2) | HUE036772T2 (en) |
NO (1) | NO3075044T3 (en) |
PL (2) | PL2983845T3 (en) |
PT (2) | PT2983845T (en) |
RU (1) | RU2630102C2 (en) |
TR (1) | TR201901071T4 (en) |
WO (1) | WO2014167043A1 (en) |
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RU2457056C1 (en) * | 2010-11-18 | 2012-07-27 | Государственное образовательное учреждение высшего профессионального образования "Самарский государственный аэрокосмический университет имени академика С.П. Королева (национальный исследовательский университет)" (СГАУ) | Method of trimming long heat exchange tube ends |
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DE102015010343A1 (en) * | 2015-08-06 | 2016-03-17 | Daimler Ag | Method for forming a guide element for guiding exhaust gas of an internal combustion engine |
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2013
- 2013-04-12 DE DE102013206577.9A patent/DE102013206577A1/en not_active Withdrawn
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DE714637C (en) * | 1938-10-25 | 1941-12-03 | Mannesmann Ag | Procedure for external and internal calibration and for calibrating the wall thickness of pipe ends |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102021202378A1 (en) | 2021-03-11 | 2022-09-15 | Peri Se | Method for producing an inner tube for a support device and support device with such an inner tube |
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PT3199259T (en) | 2019-01-24 |
CA2908573C (en) | 2017-10-17 |
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EP3199259A1 (en) | 2017-08-02 |
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DE102013206577A1 (en) | 2014-10-16 |
US10077567B2 (en) | 2018-09-18 |
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PL2983845T3 (en) | 2017-12-29 |
CN105121052A (en) | 2015-12-02 |
AU2014253135B2 (en) | 2017-02-02 |
EP3199259B1 (en) | 2018-12-26 |
ES2643364T3 (en) | 2017-11-22 |
CA2908573A1 (en) | 2014-10-16 |
PT2983845T (en) | 2017-10-25 |
CN105121052B (en) | 2018-06-12 |
AU2014253135A1 (en) | 2015-12-03 |
TR201901071T4 (en) | 2019-02-21 |
RU2630102C2 (en) | 2017-09-05 |
HRP20190094T1 (en) | 2019-05-17 |
WO2014167043A1 (en) | 2014-10-16 |
PL3199259T3 (en) | 2019-07-31 |
HK1212651A1 (en) | 2016-06-17 |
AR095857A1 (en) | 2015-11-18 |
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