WO2020074034A1 - Procédé pour la réalisation d'une nervure au niveau d'une conduite hydraulique - Google Patents

Procédé pour la réalisation d'une nervure au niveau d'une conduite hydraulique Download PDF

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Publication number
WO2020074034A1
WO2020074034A1 PCT/DE2019/100811 DE2019100811W WO2020074034A1 WO 2020074034 A1 WO2020074034 A1 WO 2020074034A1 DE 2019100811 W DE2019100811 W DE 2019100811W WO 2020074034 A1 WO2020074034 A1 WO 2020074034A1
Authority
WO
WIPO (PCT)
Prior art keywords
bead
hydraulic line
line
tool
heated
Prior art date
Application number
PCT/DE2019/100811
Other languages
German (de)
English (en)
Inventor
Alexis Galant
Mickael Pietak
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2020074034A1 publication Critical patent/WO2020074034A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means

Definitions

  • the invention relates to a method for producing a bead protruding radially outwards, preferably running all the way around the circumference of the hydraulic line, on a plastic hydraulic line, the bead being attached to at least one bead-free guide section, i.e. a line section / guide section with a constant outside diameter, or is present between two such guide sections.
  • Hydraulic lines are already known from the prior art.
  • DE 10 2010 022 506 A1 discloses a plastic line within a hydraulic or pneumatic path for clutch actuation, which has an essentially hollow cylindrical structure and the lateral surface of which is stepped in the connection area at the end, and with a hollow cylindrical, in the connection area with a stepped inner surface connector can be positively connected by means of friction welding, the connector having radial bores in the connection area.
  • the prior art always has the disadvantage that the production of the bead on the hydraulic line is not yet ready for series production.
  • the bead disappears or shrinks at high temperatures, in particular at temperatures greater than 160 ° C., since the bead shrinks as it ages. pulls or the dimensions of the bead change, which can result in a loss of function, or because the bead is deformed strongly by the connector during pull-out force tests, which has a negative effect on the values of the bead.
  • a method for producing such a bead is to be provided, which enables the bead to be designed in such a way that the dimensions of the bead do not change during the production process or over the operating time of the hydraulic line.
  • a fastening method is therefore to be developed that supports the solidification / fixation of the bead dimensions and prevents deformation of the bead.
  • the object of the invention is achieved by a method according to the invention for producing a bead protruding radially outwards on a plastic fly hydraulic line, in a first step the fly hydraulic line locally, ie in sections, ie not continuously over the entire axial extent of the flyd - Raulik ein, but only in an area in which the bead is formed, heated until the bead is formed, after which, in a second step, the Flydrauiktechnisch at least in the area in which the bead is formed, in a plant - Stuff, the shape of which preferably corresponds to a negative shape of the bead, is inserted or remains inserted in a tool that was previously used, for example, to form the bead, so that the bead is enclosed completely, preferably in the axial direction and / or in the radial direction then, in a third step, the fly hydraulic line, in particular only the bead-free guide section nitt or only the bead-free guide sections of the flydra
  • the hydraulic line is enclosed in the region of the bead by the tool, ie it remains inserted in the tool until the manufacturing process is complete.
  • the bead is thus clamped in a tool that surrounds the bead at 360 degrees, while a line routing / bend in the hydraulic line is generated by heating, bending and cooling.
  • the hydraulic line is heated in the third step at a predetermined heating temperature of 150 to 200 ° C., in particular at 165 to 175 ° C.
  • a predetermined heating temperature of 150 to 200 ° C., in particular at 165 to 175 ° C.
  • the hydraulic line is heated in the third step for 8 to 14 minutes, in particular for 12 minutes ⁇ 1 minute, at the predetermined heating temperature. In this way it can be ensured that the hydraulic line has an almost constant temperature over its entire axial extent and thus the occurrence of damage to the material is avoided.
  • the hydraulic line is cooled with water and / or with air in the fourth step.
  • a particularly cost-effective solution for cooling the hydraulic line can advantageously be provided.
  • the water and / or the air can easily reach the area of the hydraulic system to be cooled.
  • lik line are supplied. It is also possible to cool the hydraulic line from the inside.
  • the water has a water temperature of 5 to 10 ° C. Sufficiently rapid cooling and a specific change in the material structure can thus be realized, which is particularly gentle on the material of the hydraulic line, in particular polyamide.
  • the air has an air temperature of 5 to 10 ° C. Regardless of whether air and / or water is used as the cooling medium, the same process parameters can be used, which considerably simplifies the execution of the manufacturing process.
  • the advantage of air as a cooling medium is also that there is no need for additional air removal.
  • the hydraulic line is locally heated in the first step at a local heating temperature of 90 to 110 ° C., preferably at 100 ⁇ 5 ° C. In this way, the bead can be manufactured particularly easily and efficiently. At the same time, it is ensured that the material of the hydraulic line does not flow and bubbles start to form.
  • the hydraulic line is heated for 1 to 4 seconds, in particular 2 seconds ⁇ 0.5 seconds, at the predetermined local heating temperature. In combination with the predetermined local heating temperature, this results in optimal conditions for forming the bead.
  • the bead is formed in the first step by compression into the tool. This allows the bead to be easily attached to the
  • the inner contour of the tool shape can be adapted, for example by applying hydraulic pressure to the hydraulic line from the inside and pressing it into the tool shape.
  • the invention relates to an optimization of the bead on a plastic line / hydraulic line.
  • the manufacturing process is optimized, with the following steps: creating the bead by locally heating the line; Placing the line in a tool so that the bead is completely enclosed in the radial direction and / or in the axial direction; Creating the wiring by heating; Cooling the bead and lead; Disassembly of the line from the tool.
  • the bead is therefore held permanently in the tool, so that the bead cannot deform. This means that the bead cannot expand or deform outwards while the hydraulic system is being routed.
  • FIG. 1 is a perspective view of a hydraulic line with a bead to be produced by the method according to the invention
  • FIG. 8 is a schematic longitudinal sectional view of the hydraulic line, which is inserted into a tool so that the bead is radially and axially enclosed, 9 shows a schematic illustration of an exemplary curvature profile of the hydraulic line, and
  • FIG. 10 shows a schematic illustration of a manufacturing step in which the hydraulic line is removed from the tool.
  • Fig. 1 shows a radially outwardly protruding bead 1 on a hydraulic line 2 made of plastic to be produced by the inventive method.
  • the bead 1 is designed to run all the way around the circumference of the hydraulic line 2 and has an essentially semicircular cross section.
  • the hydraulic line 2 forms a channel for guiding hydraulic medium.
  • the hydraulic line has a bead area 3, in which the bead 1 is arranged, and adjacent, bead-free guide sections 4, which have a constant outer diameter, which adjoin the bead area 3.
  • the method includes a first step 5, a second step 6, a third step 7, a fourth step 8 and a fifth step 9, which follow one another in time in the order mentioned be performed.
  • Fig. 3 and 4 show steps that precede the first step 5.
  • Fig. 3 and 4 show steps that precede the first step 5.
  • the semi-finished product 10 of the hydraulic line 2 is inserted into a tool 11 and ion cal heated.
  • the tool 11 has a shape which corresponds to the negative shape of the bead 1 to be produced.
  • the semifinished product 10 is thus locally heated in the bead area 3 to a predetermined local heating temperature of 95 to 105 ° C. for about 2 seconds and pressurized from the inside, so that the bead 1 is formed by compression into the negative shape of the tool 11.
  • the hydraulic line 2 which has the bead region 3 with the radially outwardly projecting bead 1 and the guide sections adjoining it, is designed without a bead, as is shown in FIG. 7.
  • the hydraulic line 2 is inserted into a tool 12, so that the bead 1 of the hydraulic line 2 in the radial direction and in the axial direction of the tool 12, which is the same tool how the tool 11 can be enclosed.
  • the hydraulic line 2 is heated to a predetermined heating temperature, which is between 165 and 175 ° C., for 12 minutes, the hydraulic line 2, or at least the bead area 3 of the hydraulic line 2, in the tool 12 remains inserted.
  • the hydraulic line 2 is brought into the desired shape, so that the hydraulic line 2 corresponds to a predetermined curvature.
  • a predetermined heating temperature which is between 165 and 175 ° C., for 12 minutes
  • the hydraulic line 2 or at least the bead area 3 of the hydraulic line 2 in the tool 12 remains inserted.
  • the hydraulic line 2 is brought into the desired shape, so that the hydraulic line 2 corresponds to a predetermined curvature.
  • Such a course of curvature, which corresponds to the routing of the hydraulic line 2 is shown in FIG. 9.
  • the hydraulic line 2 is cooled for 3 minutes by water and / or by air, which have a water or air temperature of 5 to 10 ° C.
  • the bead area 3 remains in the tool 12 during cooling.
  • the hydraulic line 2 is removed from the tool 12, which is shown in FIG. 10.
  • the hydraulic line 2 thus remains in the tool 12 during the second step 6, the third step 7 and the fourth step 8, which completely surrounds the bead 1 in the axial direction and / or in the radial direction, so that the Bead 1 through the heat treatment of hydraulic line 2 changed.
  • the dimensions of the bead 1 are then checked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)

Abstract

L'invention concerne un procédé pour la réalisation d'une nervure (1) faisant saillie de manière radiale vers l'extérieur au niveau d'une conduite hydraulique (2) en plastique, la nervure (1) s'associant à au moins une partie d'acheminement (4) exempte de nervure ou étant présente entre deux telles parties d'acheminement (4), dans une première étape (5), la conduite hydraulique (2) étant localement chauffée, jusqu'à ce que se forme la nervure (1) ; ensuite dans une deuxième étape (6), la conduite hydraulique (2) , au moins dans une zone (3), dans laquelle la nervure (1) est formée, étant introduite ou restant dans un outil (11, 12) de sorte que la nervure (1) soit enfermée en direction axiale et/ou en direction radiale ; ensuite dans une troisième étape (7), la conduite hydraulique (2) étant chauffée en direction du conduit et étant amenée dans un tracé incurvé prédéterminé ; ensuite dans une quatrième étape (8), la conduite hydraulique (2) étant refroidie, et la conduite hydraulique (2) étant retirée de l'outil (11, 12) dans une cinquième étape (9) ultérieure.
PCT/DE2019/100811 2018-10-10 2019-09-11 Procédé pour la réalisation d'une nervure au niveau d'une conduite hydraulique WO2020074034A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018124941.1 2018-10-10
DE102018124941.1A DE102018124941A1 (de) 2018-10-10 2018-10-10 Verfahren zum Herstellen eines Wulstes an einer Hydraulikleitung

Publications (1)

Publication Number Publication Date
WO2020074034A1 true WO2020074034A1 (fr) 2020-04-16

Family

ID=68242222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2019/100811 WO2020074034A1 (fr) 2018-10-10 2019-09-11 Procédé pour la réalisation d'une nervure au niveau d'une conduite hydraulique

Country Status (2)

Country Link
DE (1) DE102018124941A1 (fr)
WO (1) WO2020074034A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009982A (en) * 1974-02-11 1977-03-01 Universal Plastic Pipe Bending Corporation Mechanism for forming an enlarged coupling on the ends of plastic pipe
FR2336227A1 (fr) * 1975-12-23 1977-07-22 Megias Ets Joseph Moule ouvrant pour le thermoformage de coudes et coudes obtenus
DE102010022506A1 (de) 2009-06-18 2010-12-23 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Kunststoffleitung
US20140062083A1 (en) * 2011-04-29 2014-03-06 Jin-Uk Shin Method For Reinforcing A Connection Tube Having An Expansion Part, And Connection Tube Having An Expansion Part Reinforced By Said Method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009982A (en) * 1974-02-11 1977-03-01 Universal Plastic Pipe Bending Corporation Mechanism for forming an enlarged coupling on the ends of plastic pipe
FR2336227A1 (fr) * 1975-12-23 1977-07-22 Megias Ets Joseph Moule ouvrant pour le thermoformage de coudes et coudes obtenus
DE102010022506A1 (de) 2009-06-18 2010-12-23 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Kunststoffleitung
US20140062083A1 (en) * 2011-04-29 2014-03-06 Jin-Uk Shin Method For Reinforcing A Connection Tube Having An Expansion Part, And Connection Tube Having An Expansion Part Reinforced By Said Method

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