EP0874096B1 - Machine et procédé pour le sertissage d'un coupleur sur un rond à béton - Google Patents

Machine et procédé pour le sertissage d'un coupleur sur un rond à béton Download PDF

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Publication number
EP0874096B1
EP0874096B1 EP19970490012 EP97490012A EP0874096B1 EP 0874096 B1 EP0874096 B1 EP 0874096B1 EP 19970490012 EP19970490012 EP 19970490012 EP 97490012 A EP97490012 A EP 97490012A EP 0874096 B1 EP0874096 B1 EP 0874096B1
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EP
European Patent Office
Prior art keywords
coupler
crimping
concrete
concrete bar
tensile
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.)
Expired - Lifetime
Application number
EP19970490012
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German (de)
English (en)
French (fr)
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EP0874096A1 (fr
Inventor
Jean-Marie Pithon
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DEXTRA HOLDING
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DEXTRA HOLDING
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Filing date
Publication date
Application filed by DEXTRA HOLDING filed Critical DEXTRA HOLDING
Priority to EP19970490012 priority Critical patent/EP0874096B1/fr
Priority to DE1997604108 priority patent/DE69704108T2/de
Priority to TW87105962A priority patent/TW405008B/zh
Priority to RU98107906A priority patent/RU2159312C2/ru
Publication of EP0874096A1 publication Critical patent/EP0874096A1/fr
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Publication of EP0874096B1 publication Critical patent/EP0874096B1/fr
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    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars

Definitions

  • the present invention relates to a machine and a process for crimping a coupler on a concrete rod, said coupler comprising a threaded part at one of its ends and a hollow cylindrical part in which is introduced the end of the concrete ring.
  • the present invention is intended to secure the coupler and the concrete ring in order to participate in the connection between two coaxial concrete rods.
  • couplers For transport, storage and concrete rods are often long limited. This requires, when the dimensions of the constructions require it, to assemble several rounds to concrete butt. This assembly can be done without special preparation of the end of the concrete reinforcing bars using parts called couplers.
  • the couplers fit on the end of the round concrete by inserting the end of the concrete rod into a hollow cylindrical part formed at one end of the coupler.
  • the couplers thus positioned allow constitute the interface between two concrete rods, either directly, either with the use of a room intermediate which connects the two couplers.
  • the joining operation of the coupler and the concrete rod can be completely manual as is the case when the operator himself handles a crimping tool which radially crushes the material of the coupler at different places on its outer surface so as to establish the cohesion between the concrete ring and the coupler.
  • the salary cost of the achievement coupler crimping on a concrete rod is very important since it requires intervention, throughout the operation, of one or more users.
  • the salary cost is all the more important since, taking into account technical particularities and the quality requirement in the realization of coupler crimping on concrete rod, the operator must most often have suitable training and be sufficiently qualified to carry out the operations of crimping.
  • Another disadvantage of devices and current processes is that they completely dissociate the phase of actual crimping and the verification and quality control of crimps performed.
  • the tensile tests currently carried out are particularly expensive since they are carried out at outside the crimp production site couplers on concrete rods and since they require a additional human intervention, most often from Qualified staff.
  • the external laboratory involves samples prepared, which is not strictly speaking a guarantee of certainty, given the manipulations that may be accomplished during the manufacture of these tests.
  • Another disadvantage of devices and current crimping processes is that they make it difficult access to certification as part of a policy quality assurance.
  • the patent is known from the state of the art EP-A-0.716.195. This discloses a mechanical connection between two concrete rods using crimping means of a socket on a concrete ring. He also discloses the device, as well as the method, for carrying out the mechanical connection using the crimping means.
  • These crimping means include translation means of a spinning tool, said tool, while moving, deforms the sleeve and crimp it on the end of the concrete ring.
  • the axial crimping of the sleeve on the concrete rod is made by acting against a fixed stop, which provides a random deformation of the sleeve given the shape variable of the reinforcing bars and therefore a random setting which may be defective.
  • This patent EP 0.716.195 also discloses means of testing the mechanical connection between the socket and the concrete rod used to check the quality of the crimping.
  • This test consists, for an observer, in observing visually on a pressure gauge if there is a slip between the socket and the concrete ring, which results in a fall pressure on the pressure gauge.
  • This test is separate from the crimping operation, and it is carried out by means of the spinning tool in position on the fixed stop which transmits then a constraint at the level of the mechanical connection between the socket and the concrete ring.
  • This type of test therefore does not allow not to control precisely and automatically the efforts of constraint to exercise at the level of the mechanical connection between the two elements, since it does not avoid all risk operator error.
  • crimping concrete coupler is currently a technique of restricted distribution, which is harmful given the specific interest of connections by crimping couplers on concrete rod.
  • the present invention aims to remedy the disadvantages of current devices and methods and has in particular to achieve and control each of the coupler - round to concrete connections so that their quality and their mechanical characteristics are established individually.
  • this invention has various advantages and in particular provides for the using fully automatic means to carry out the crimping and tensile testing.
  • the entire cycle of crimping which includes the fitting of the fitted coupler on the concrete rod in the machine and the spinning operation proper, takes place without human intervention as soon as the cycle is started and fully automatic.
  • This automaticity allows for example to avoid any risk of user error both in terms of crimp operations as test operations of traction.
  • the automatic means used according to the invention allows crimping and tensile tests following fully operations similar for all coupler - round to concrete connections. This avoids the production of crimping couplers on concrete reinforcing bars with different characteristics each other which is inevitable in the case of a human intervention.
  • the invention also has the advantage of avoiding any risk of user error. Indeed, the task of the operator is limited to the cycle start operation since it suffices to introduce the concrete ring in the machine and take it out again at the end of the operation after crimping and tensile testing.
  • the set of parameters which involved in the crimping and testing cycle traction is set by the operator's choice of the type of sector to be implemented.
  • the device according to the invention manages all of the values to give to the cycle parameters. So we avoid everything risk of user error, particularly in the choice of preset charge level at which the connection will be tested coupler on concrete rod. Consequently, the quality of the crimping and ensuring its mechanical resistance to traction are further enhanced.
  • the process and the machine according to the invention also have the advantage of adapt to dimensional deviations and imperfections and geometrical shapes of concrete rods.
  • the present invention also aims to remedy this drawback by compensating for deviations and geometric and dimensional imperfections concrete reinforcing bars so as to make the modifications made to the material of the coupler during crimping.
  • the invention has for this the advantage of providing a automatic control of the elongation of the material of the coupler induced by the spinning force.
  • the invention has the advantage of achieving a crimping providing the same modifications of mechanical characteristics of the coupler whatever the initial imperfections.
  • the present invention also aims to provide for crimping and testing traction in a single global operation.
  • the machine and the method according to the invention have in effect the advantage of combining automatic means of crimping and automatic tensile testing means.
  • the combination in one machine of means automatic crimping and tensile testing is particularly interesting. It streamlines first the sequence of the two operations since it removes all intermediate handling of the concrete reinforcing bar. Indeed, the crimping cycle and tensile testing cycle are linked automatically on the same site and in the same machine.
  • Another advantage of the combination in the same machine of automatic crimping means and means automatic tensile testing is being able to test individually all coupler connections on round to concrete.
  • the invention by grouping in the same machine automatic crimping means and automatic means of tensile testing, allows to chain systematic crimping and tensile testing.
  • the invention is particularly advantageous since it further increases mechanical safety connections and their quality.
  • Another object of the invention is to allow obtain quality assurance certification so easy.
  • the present invention combines in a single machine and in a single process the whole crimping and tensile tests. So there is no intervention human during the cycle after the cycle starts and no change of machine. Insurance certification quality therefore relates only to the single machine according to the invention which avoids having to certify at the same time the quality of the operators and the quality of the crimping and tensile testing operations.
  • the present invention provides a full traceability of each coupler - round to concrete.
  • Another object of the invention is to allow the random destructive testing, periodic or manually triggered to strengthen the link security.
  • Performing destructive tests has the advantage to verify that the concrete ring breaks, that is to say that its maximum breaking stress is lower than that of the coupler connection on the round to concrete.
  • this destructive test can be performed either by manual triggering or automatic. In this case, it is possible to program a destructive testing periodically or randomly.
  • Another object of the invention is to obtain a full automatic crimping and tensile testing so as to limit the importance of human intervention.
  • the machine and method for crimping a coupler on a concrete ring described here have means automatic crimping and automatic means tensile testing.
  • the user has a very limited liability since it suffices to introduce the concrete ring on which the coupler is fitted in the machine and at the end of the cycle, come out of the machine concrete rod on which the coupler was crimped and having undergone a tensile test.
  • the operator therefore has for example the possibility during the automatic cycle to prepare the concrete ring and the next coupler and carry out the fitting. We thus increases productivity since the time required to the operator is reduced and since the crimping and testing traction are performed automatically faster than manually.
  • the present invention can be operated by an operator without any particular qualification.
  • Another object of the invention is to be usable on site or in the workshop.
  • the machine (1) for crimping a coupler (27) on a concrete ring (28) comprises automatic crimping means and automatic means tensile testing. These automatic means allow the crimping of couplers (27) on rounds concrete (28) while ensuring the quality of the connections.
  • the automatic crimping means comprise means (2, 3, 9, 15, 16, 19, 26, 33) for fitting the coupler (27). These means allow automatic placement on the screwing tool (2) of the coupler (27). They ensure also unscrewing the coupler at the end of the cycle.
  • the means (2, 3, 9, 15, 16, 19, 26, 33) for positioning the coupler (27) have a shaft (33) integral with the tool screwing (2).
  • This tree (33) constitutes the support for the screwing tool (2). Its shape and size can be variable and it can appear as illustrated Figure 1.
  • the shaft (33) allows the installation of the tool screwing (2) on the machine (1) and its replacement, especially if the diameter of the coupler (27) is changed to place on the screwing tool (2).
  • the tree (33) will preferably made so that it can be mobile in rotation and translation along its main axis. His shapes will therefore most often be substantially cylindrical.
  • the screwing tool (2) is secured with the shaft (33) by current means and in particular by a thread (34) as illustrated in FIG. 1.
  • a blocking by key will be commonly used to allow rotation reverse of the screwing tool (2) - coupler (27) connection.
  • the shaft (33) is movable in translation according to the axis of the coupler (27) of the guide means (19).
  • These means guide (19) may be constituted by a hollow cylinder (19) whose body is constituted by an outer envelope (35). In this way, the hollow cylinder (19) allows mobility of the shaft (33) in translation along the axis of the coupler (27) and also in rotation.
  • the hollow cylinder (19) will be of current design and positioned as illustrated in Figure 1.
  • the envelope (35) of the hollow cylinder (19) will preferably be shaped cylindrical hollow and could be made up of different materials such as standard steel.
  • the envelope external (35) allows the fixing of the hollow cylinder (19) on the structure (40) of the machine (1).
  • the placement means (2, 3, 9, 15, 16, 19, 26, 33) also include rotation means (9, 26) for the tree (33).
  • the object of these rotation means (9, 26) is to drive the shaft (33) - tool in clean rotation screw (2) so as to set up the threaded part of the coupler (27) on the machine (1).
  • the means of rotation (9, 26) of the shaft (33) are constituted by a motor (9) driving in rotation a transmission shaft (26).
  • the transmission shaft (26) is linked in rotation with the tree (33) so as to drive it.
  • the motor (9) will be of current design and could in particular be a hydraulic motor. His power and its rotation speed will be chosen so as to adapt to a good screwing on the screwing tool (2) of the part threaded (29) of the coupler (27).
  • the drive shaft (26) may have different shapes but will preferably be lengthened and cylindrical. We can use any common means to make the rotation connection of the motor (9) on the shaft of transmission (26). We can in particular place one or several keys at the end of the drive shaft (26).
  • the means of placing (2, 3, 9, 15, 16, 19, 26 and 33) of the coupler (27) comprises a motor (9), a shaft of transmission (26), a shaft (33) and a screwing tool (2)
  • the fitting of the coupler (27) can be carried out by the automatic screwing of the threaded part (29) of the coupler (27) on the threaded part of the screwing tool (2) by the rotation of the shaft assembly (33) - screwing tool (2) by means of the motor (9) and the drive shaft (26).
  • the invention in a mode particular embodiment, includes detection means (15, 16) of the presence of the shaft (33) in the advanced position or moved back.
  • the detection means (15, 16) could be current design and in particular be constituted by capacitive type position sensors. We will be able to common use two position sensors (15, 16) placed at two different locations from the end upper (36) of the shaft (33).
  • the position (16) is placed opposite the upper end (36) of the shaft (33) when the latter is in position back to school.
  • This position of the shaft (33) corresponds to the state of rest, that is to say when the tree (33) has not moved relative to the hollow cylinder (19).
  • the second capacitive sensor (15) is placed a little further upstream of the machine (1) as illustrated in the figure 1.
  • the position sensor (15) is positioned preferably so as to be vis-à-vis the upper end (36) of the shaft (33) when the latter is in advanced position.
  • the advanced position corresponds to the case where the shaft (33) is translated relative to the hollow cylinder (19).
  • the means for detecting (15, 16) the presence of the tree (33) therefore make it possible to determine whether the tree (33) is moved from its rest position which is the retracted position where it is tucked into the hollow cylinder (19).
  • the invention comprises reaction means (3) of the translation of the shaft (33).
  • reaction means (3) could for example be constituted by a pneumatic or hydraulic cylinder (3) mounted at the end of the drive shaft (26) and applying at the upper end (36) of the shaft (33).
  • the reaction means (3) make it possible to obtain a spring effect for the translational movement of the tree (33).
  • the different means of implementation (2, 3, 9, 15, 16, 19, 26, 33) will preferably be chosen by shape and dimension so as to constitute a whole unitary and easily mounted. Each item will nevertheless sized to support the efforts generated during the installation of the coupler (27) on the screwing tool (2).
  • the crimping machine (1) comprises also a spinning tool (37) as illustrated in figure 1.
  • the spinning tool (37) will most often include a die (7) and a die holder crown (8) ensuring the maintenance of the sector (7) and the possibility of adapting several diameters or types of die (7) on the machine (1).
  • the sector (7) will be of current design and its diameter will be chosen to suit the diameter outside of the coupler (27) to be crimped.
  • the threaded part (29) of the coupler (27) can be introduced into the die (7) to the neck (31) of the coupler (27).
  • the machine (1) comprises also means (13) for translating the spinning tool (37) along the axis of the coupler (27).
  • the means (13) of translation consist of at least one spinning cylinder (13) integral with the spinning tool (37).
  • spinning cylinders (13) for example hydraulic, whose axes are parallel and have the same direction as the axis of the coupler.
  • the die (7) is mounted on the machine (1) via a die holder crown (8).
  • This crown may be cylindrical in shape and will be adapted to mounting the die (7).
  • This assembly can be carried out by any common means such as screw-nut systems.
  • the die holder crown (8) is integrally mounted with the translation means (13) of the spinning tool (37).
  • the die holder crown (8) is driven by three spinning cylinders (13) exerting a thrust distributed in three points of the circumference of the die holder crown so as to translate the following the axis of the coupler.
  • guides (22) may be used parallel to the axis of the coupler (27) and guiding the translation of the crown die holder (8) when spinning.
  • the machine (1) comprises means for counter-thrust (4, 5, 6) to control automatically the elongation of the material of the concrete reinforcing rod (28) induced by the spinning effort, depending on the imperfections and dimensional and geometric deviations of the coupler (27). In this way, we guarantee the consistency of changes in the mechanical characteristics undergone by the coupler (27) during spinning.
  • the backstop means (4, 5, 6) consist of two radial translation cylinders (5), at least one push cylinder (6) and two half shells (4).
  • the half shells (4) make it possible to constitute a support by their upper face (38) on the base of the coupler (27).
  • the shape and dimensions of the half shells (4) may be variable but will preferably be adapted to the dimensions of the coupler (27) and the concrete ring (28).
  • the half shells (4) can be in various materials and in particular in standard steel treated.
  • the curved part of each half shell will be preferably made so as to adapt to the diameter of the concrete ring (28) with a slight tightening.
  • the half shells can be driven by a translation by means of two cylinders radial translation (5), most often hydraulic.
  • the Figure 2 shows schematically two radial translation cylinders (5) the piston of which is integral with a half-shell (4) so to command them in translation in a direction perpendicular to that of the axis of the coupler (27). Of this way it is possible to adjust the radial position of each of the half shells (4).
  • the machine (1) preferably comprises at least one cylinder pusher ensuring translation along the axis of the coupler (27) half shells (4).
  • the half shells (4) and the radial translation cylinders (5) are mounted on a crown (39).
  • This crown can be present in various shapes and sizes and will preferably substantially of shapes and dimensions equivalent to those of the die holder crown (8).
  • the crown (39) constitutes the base for holding the half shells (4) and the jacks radial translation (5) and allows, by support of the jacks pushers (6) on the surface of this ring (39) the translation of the half shells (4) along the axis of the coupler (27).
  • the push cylinder (s) (6) will be preferably fitted with a valve allowing keep the pushing force they exert at a value constant. According to this configuration, the regulation of the pushing force will be carried out by a displacement in advance or retraction of the piston of the push cylinders (6). Of this way, by varying the position of the jack (s) pushers (6), we control the counterpush force applied to the coupler (27) and therefore the elongation of the metal of the coupler (27).
  • the machine (1) for crimping a coupler (27) on a concrete ring (28) according to the invention comprises also automatic means of tensile testing.
  • Automatic means of tensile testing will generally be constituted by blocking means (11) concrete reinforcing bar (28) and biasing means (14) in traction of the coupler (27). These latter means allow test the mechanical tensile strength up to a preset charge level or until the rupture of the connection formed between the coupler (27) and the concrete reinforcing bar (28) by crimping.
  • the blocking means (11) of the concrete rod (28) consist of a vice (11) as illustrated in the figure 3.
  • Figure 1 shows the realization of a vice (11) placed at the end of the machine (1) opposite the means of fitting (2, 3, 9, 15, 16, 19, 26, 33) of the coupler (27).
  • the vice (11) will be of current design and its opening and its closure will preferably be ordered by a control cylinder (12).
  • the vice (12) comprises jaws (21) with inclined reach allowing the complete blocking of the concrete reinforcing bar (28) during the test of traction.
  • Figure 1 shows jaws (21) based on an inclined bearing secured to the structure (40) of the machine (1).
  • the jaws (21) will be of common design and preferably have faces capable of press on the outside diameter of the concrete bars (28).
  • the vice (11) thus described allows blocking complete with the concrete reinforcing bar (28) thanks to its jaws (21). This blocking can be controlled automatically using the control cylinder (12).
  • the locking means (11) biasing means (14) in traction of the coupler (27).
  • the biasing means (14) with a part intermediate (18).
  • the coin intermediate (18) is placed between the outer casing (35) of the hollow cylinder (19) and the shaft (33).
  • the intermediate piece (18) constitutes a guide for the displacement of the shaft (33) in order to provide the means for shaft guide (33).
  • the intermediate piece (18) is fixed on the hollow piston of the jack (19) which can translate in the outer casing (35).
  • the hollow cylinder (19) is formed of an outer casing (35), of a part intermediate (18) integral with its piston and the shaft (33).
  • the biasing means (14) are then produced by the translation of the intermediate piece (18) in the outer casing (35) of the hollow cylinder (19). This translation will be done by blocking the mobility of the tree (33) with respect to the intermediate piece (18) and in particular by means of a shoulder (48) formed on the shaft (33) intended to come into abutment on a dish made on the intermediate piece (18).
  • the motor (9) and the drive shaft (26) are held by means of a support integral with the part intermediate (18). That way when trying to traction, it is the assembly constituted by the screwing tool (2), the shaft (33), the intermediate piece (18), the shaft of transmission (26) and the motor (9) which is driven by a translation along the axis of the coupler.
  • Figure 1 shows schematically the realization of a cylinder central reminder (20) whose piston is likely to shock absorbing support on the intermediate piece (18).
  • the return cylinder (20) also has the function to bring back the intermediate piece (18) and the shaft (33) in retracted position in the outer casing (35) of the hollow cylinder (19) at the end of the tensile test.
  • the return cylinder (20) will be of current design. Its dimensions and characteristics will be adapted to the effort that it is likely to provide to cushion the displacement of the piece (18) and to fit the piece (18) into the envelope external (35).
  • the different components of the machine (1) can be mounted and maintained by a structure (40) forming the machine frame (1).
  • the structure (40) comprises fixed rings (49, 50, 51) mounted integrally by means of bars (52).
  • Fixed crowns allow in particular to support the spinning cylinders (13), the outer casing (35), the means of positioning (2, 3, 9, 15, 16, 19, 26, 33) and the locking means (11) of the concrete rod (28). They will have preferably shapes and dimensions similar to those of the die holder crown (8).
  • Bars (52) assemble the crowns fixed (49, 50, 51) and also make it possible to adapt a casing around the machine.
  • Bars (52) and crowns (49, 50, 51) may for example be made of a type steel current.
  • Automatic crimping means and automatic tensile testing means are controlled from centralized by a programmable controller. This one can manage the progress of the crimping and testing cycle traction and adaptation according to the diameter of the coupler parameters of the crimping and testing cycle.
  • the programmable controller allows to direct the sequential sequence of all crimping operations and tensile testing. This automaton will be designed current and programmable type.
  • the cycle parameters described above will be most often preset for an outside diameter of the round to concrete.
  • the diameter of the die (7) being adapted to the outside diameter of the coupler (27), the operator's choice a system (7) automatically determines which is the outside diameter of the concrete block to be crimped and to adjust the parameters of the crimping and testing cycle in order to automatically adapt the parameters of the crimping and testing, the spinning tool (37) can be realized in a particular way.
  • the spinning tool (37) further comprises a die (7) and a die holder ring (8), a device for locating the diameter of the die (7) connected to the programmable controller.
  • the device for locating the diameter of the according to the invention will include position (17) fixed on the die holder crown (8) as as illustrated in figure 4.
  • the position sensors (17) may be of current design and will in particular be inductive sensors. These position sensors (17) deliver binary information according to the presence or absence of a landmark.
  • markers are distributed in a predetermined manner but different on the surface of each die (7). Their position is chosen so that they can be placed opposite certain position sensors (17).
  • the tracking device also includes a positioning device (44) allowing to uniquely mount the die (7) on the die holder crown (8).
  • the positioning device (44) will for example consist of a position pin (45) able to cooperate with a cavity formed on the surface of the die (7), and by mounting screws (46) allowing the attachment of the die (7) on the die holder crown (8).
  • the presence of a position pin (45) only authorizes only possibility of mounting the die (7) on the die holder crown (8). In this way, to a sector particular corresponds to a particular operating state position sensors (17).
  • a combination of state detection position sensors (17) corresponds to a die (7) and therefore to a diameter of the coupler (27).
  • the composed message binary information from position sensors (17) can be transmitted to the PLC in order to adapt accordingly the parameters of the crimping cycle and of tests.
  • the programmable controller also allows to record during the tensile test the evolution of the tensile force and the displacement of the means of solicitation (14). It is therefore possible to save the data from each tensile test.
  • the programmable controller can also manage the periodic or random testing destructive. It also allows to know the value of the tensile force corresponding to the breaking of the circle at concrete (28) or the coupler link (27) on a concrete rod (28).
  • the method of crimping a coupler (27) on a concrete ring (28) allows automation of the crimping of couplers (27) on concrete reinforcing bars (28) while ensuring the quality of connections.
  • This crimping process makes it possible to limit human intervention and includes in particular the stages following.
  • the assembly thus formed can be introduced into the machine (1) until the part is brought into contact threaded (29) of the coupler (27) with the screwing tool (2).
  • the crimping machine (1) allows, by automatic operation, to obtain connections by crimping couplers (27) on concrete rod (28) completely safe.
  • the position sensor (16) moves to the position rest as soon as the upper end (36) of the shaft (33) has translated.
  • position sensor (15) it is activated and triggers the rotation of the motor (9).
  • the motor (9) drives through the shaft of transmission (26) the shaft (33) and the screwing tool (2).
  • the threaded part (29) of the coupler (27) begins to be screwed on the screwing tool (2).
  • the coupler (27) then arrives in a position where its neck (31) is fully engaged in the die (7).
  • the shaft (33) In end of screwing of the threaded part (29), the shaft (33) is fully returned to a remote position which reactivates the position sensor (16).
  • the shaft (33) Once in abutment at the shoulder (48), the shaft (33) causes an increase in the engine torque (9) whose rotation is then interrupted for example by means of an incorporated pressure switch.
  • the vice (11) is then controlled by the control cylinder (12).
  • the control cylinder (12) causes the translation of the jaws (21) which come to bear on the diameter of the concrete ring (28).
  • the spinning operation then begins.
  • the displacement of the die (7) is operated by translation of the spinning cylinders (13) which cause a displacement of the die (7) and of the die holder crown (8) along the axis of the coupler (27).
  • Guides (37) allow in a particular embodiment to ensure the correct orientation of the movement of the die (7).
  • the push cylinders (6) exert a force on the base of the coupler (27) which opposes to the spinning force exerted by the die (7).
  • the cylinders pushers (6) are capable of translating so as to move back or forward the half shells (4).
  • the counterpush means (4, 5, 6) have the advantage of controlling the elongation of the metal of the coupler (27) and to guarantee the consistency of changes to mechanical characteristics of the steel making up the coupler (27). So if the diameter of the concrete ring (28) is greater than its theoretical value, the effort of the sector (7) increases, which produces an immediate recoil of the shells (4) by means of the push cylinders (6). The elongation of the metal of the coupler (27) will then be more important. If however diameter of the concrete reinforcing rod (28) is less than its value theoretical, the effort produced by the sector (7) is less important and does not produce a recoil of the half shells. The elongation of the metal making up the coupler is then less important.
  • the die (7) comes to push on the half shells (4) and causes a retreat of the cylinders thrust (6).
  • the force exerted by the spinning cylinders (13) increases by fast way.
  • the corresponding pressure in the cylinders of wiring (13) is such that it triggers the zeroing of spinning cylinders (13).
  • the spinning cylinders (13) then return to initial position.
  • the half shells (4) are then or at the same time cleared from the circumference of the circle (28) by control of the radial translation cylinders (5).
  • the biasing means (14) are then activated to perform the tensile test.
  • the room intermediate (18) gradually translates relative to the outer casing (35) by driving the shaft (33) by its shoulder (48). This movement continues to a level preset load corresponding to a control pressure displacement of the intermediate piece (18) in the outer casing (35).
  • the effort data traction and displacement of the intermediate piece (18) are stored in order to ensure traceability of each coupler (27) - concrete reinforcing rod (28) connection.
  • the programmable controller controls carrying out a destructive test, the latter is triggered and continued until the bar broke.
  • the cycle automatic managed by the automaton resumes by deactivation vice (11). This deactivation is carried out by command of the control cylinder (12). Unscrewing the coupler (27) can then be done manually, all organs of the machine (1) having been reset beforehand so automatic.
  • Resetting the control pressure of the biasing means (14) triggers the rotation of the motor (9) in the opposite direction to that of screwing.
  • the motor (9) makes it possible to unscrew the coupler (27).
  • the control cylinder (12) of the vice (11) is decompressed so as to release the concrete ring (28) of the grip of the jaws (21).
  • the round to concrete (28) on which the coupler (27) has been crimped and whose link has been checked can then be extracted from the machine (1) manually by the operator.
  • the biasing means (14) continue their action until total separation of the coupler (27) and round (28). The coupler (27) is then unusable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Labeling Devices (AREA)
EP19970490012 1997-04-25 1997-04-25 Machine et procédé pour le sertissage d'un coupleur sur un rond à béton Expired - Lifetime EP0874096B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19970490012 EP0874096B1 (fr) 1997-04-25 1997-04-25 Machine et procédé pour le sertissage d'un coupleur sur un rond à béton
DE1997604108 DE69704108T2 (de) 1997-04-25 1997-04-25 Maschine und Verfahren zum Quetschen von einer Müffe an einem Betonstahl
TW87105962A TW405008B (en) 1997-04-25 1998-04-18 Device for coaxially connecting a coupler to a reinforcement bar
RU98107906A RU2159312C2 (ru) 1997-04-25 1998-04-22 Устройство для соосного соединения муфты с армирующим прутком

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19970490012 EP0874096B1 (fr) 1997-04-25 1997-04-25 Machine et procédé pour le sertissage d'un coupleur sur un rond à béton

Publications (2)

Publication Number Publication Date
EP0874096A1 EP0874096A1 (fr) 1998-10-28
EP0874096B1 true EP0874096B1 (fr) 2001-02-21

Family

ID=8230064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970490012 Expired - Lifetime EP0874096B1 (fr) 1997-04-25 1997-04-25 Machine et procédé pour le sertissage d'un coupleur sur un rond à béton

Country Status (4)

Country Link
EP (1) EP0874096B1 (ru)
DE (1) DE69704108T2 (ru)
RU (1) RU2159312C2 (ru)
TW (1) TW405008B (ru)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103741887B (zh) * 2013-12-20 2015-08-12 青岛森林金属制品有限公司 用于锥套锁紧式钢筋连接接头的安装工具
CN107088747A (zh) * 2017-06-27 2017-08-25 鲁泽良 一种钢筋直螺纹套筒自动连接机
CN108723266A (zh) * 2018-06-29 2018-11-02 中民筑友有限公司 一种螺纹钢筋加工及套筒安装设备
CN110080536B (zh) * 2019-05-29 2020-01-03 陕西省三和建设工程有限公司 一种基于钢筋套筒连接的钢筋转动连接方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728771A (en) * 1971-04-15 1973-04-24 Crawford Fitting Co Apparatus for swaging and testing ferrules
DE2233046A1 (de) * 1972-07-05 1974-01-24 Alto Mannhart Vorrichtung zum festen verschrauben zweier kontermuttern einer schraubverbindung
CA994534A (en) * 1973-06-28 1976-08-10 Ronald E. Marsden Splicer for reinforcing bars
US4057882A (en) * 1973-08-06 1977-11-15 Zeitgeist Ag. Apparatus for compressing sleeves onto structural rods
US4019232A (en) * 1974-12-04 1977-04-26 Daido Seiko Kabushiki Kaisha Ram type steel bar coupling apparatus
DE3109687C2 (de) * 1981-03-13 1985-06-27 Dyckerhoff & Widmann AG, 8000 München Gerät zum Verbinden von zwei stumpf gestoßenen Bewehrungsstäben mittels einer Muffe
FR2507232A1 (fr) * 1981-06-09 1982-12-10 Freyssinet Int Stup Dispositif de mise en tension de barres de precontrainte et de determination de cette tension
JPS58112622A (ja) * 1981-12-18 1983-07-05 Sukai Ace:Kk ロ−プ、棒鋼の端末止め金具、その製造方法及びその製造装置
EP0098099A3 (en) * 1982-06-29 1984-03-28 Ccl Systems Limited Two part connector for concrete reinforcing bars
FR2711385B1 (fr) * 1993-10-20 1995-12-15 Dextra Europe Sa Liaison mécanique de ronds à béton, dispositif pour la mise en place de cette liaison mécanique et procédé de fixation de liaison mécanique de ronds à béton.

Also Published As

Publication number Publication date
DE69704108D1 (de) 2001-03-29
TW405008B (en) 2000-09-11
EP0874096A1 (fr) 1998-10-28
RU2159312C2 (ru) 2000-11-20
DE69704108T2 (de) 2001-09-20

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