WO2018020872A1 - 後熱処理装置及び後熱処理方法 - Google Patents
後熱処理装置及び後熱処理方法 Download PDFInfo
- Publication number
- WO2018020872A1 WO2018020872A1 PCT/JP2017/021740 JP2017021740W WO2018020872A1 WO 2018020872 A1 WO2018020872 A1 WO 2018020872A1 JP 2017021740 W JP2017021740 W JP 2017021740W WO 2018020872 A1 WO2018020872 A1 WO 2018020872A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat treatment
- rail
- post
- displacement
- detected
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/26—Railway- or like rails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a post heat treatment apparatus and a post heat treatment method, and more particularly, to a post heat treatment apparatus and a post heat treatment method for automatically detecting a welded portion of a rail connected by welding and removing the residual stress of the welded portion by heating again.
- the rail R includes a head r ⁇ b> 1 where contact with a wheel occurs, a leg r ⁇ b> 2 that contacts a sleeper, and a column part r ⁇ b> 3 that connects the head r ⁇ b> 1 and the leg r ⁇ b> 2.
- fatigue cracks may occur in the horizontal direction starting from the column portion r3 of the rail or the column portion r3 due to repeated passage of vehicles including a heavy load freight vehicle.
- the fatigue crack is affected by a strong tensile residual stress in the vertical direction (circumferential direction) generated in the column portion r3 in the welded portion W. This tensile residual stress is caused by a temperature gradient between the welded portion W and its periphery during welding.
- Patent Document 1 discloses an induction heating coil that is disposed at a predetermined distance (20 mm or more and 300 mm or less) in the length direction from the rail welding center and that heats the entire circumference of the rail.
- a post heat treatment apparatus is disclosed. According to this apparatus, the residual stress existing in the welded portion can be effectively reduced by heating at a high heating rate using the electromagnetic induction coil. Further, since the induction heating coil heats the entire circumference of the rail, an increase in residual stress in the rail length direction can be suppressed.
- the present invention has been made paying attention to the above points, and in a post-heat treatment apparatus that performs post-heat treatment on the welded portion of the rail, the welded portion is automatically detected and heat treatment is performed at an appropriate position on the rail.
- An object of the present invention is to provide a post-heat treatment apparatus and a post-heat treatment method capable of performing heat treatment.
- a post-heat treatment apparatus is a post-heat treatment apparatus that performs post-heat treatment of a welded rail, and the surface of the rail is formed at a predetermined pitch along the longitudinal direction of the rail.
- a displacement detection means for detecting a displacement, and a displacement detected by the displacement detection means at a predetermined pitch is determined as a start point of a weld when a predetermined threshold value is continuously exceeded a predetermined number of times, and the predetermined threshold value is set to a predetermined value.
- control means for determining the end point of the welded portion when the number of times falls continuously, and heating means for performing heat treatment based on the position of the welded portion detected by the control means. It is desirable that the displacement detection means detect the displacement by irradiating the rail surface with laser light and receiving the reflected light.
- welding is performed when the displacement measured at a predetermined pitch along the length of the rail continuously exceeds a threshold value a predetermined number of times with respect to a rail welded portion that has been made into a long rail by welding. It is determined as the start point of the welded portion, and when it is below the threshold value a predetermined number of times, it is determined as the end point of the welded portion.
- the center position of a welding part can be detected automatically and the suitable arrangement
- a stable quality rail can be obtained after post-heat treatment.
- the threshold value when the threshold value is exceeded a predetermined number of times, it is determined as the starting point of the welded portion, so that a narrow foreign object such as spatter is not erroneously detected. It is possible to detect with high accuracy even for the welded part.
- a post-heat treatment method is a post-heat treatment method for performing post-heat treatment on a welded rail, and the rail is provided at predetermined pitches along the longitudinal direction of the rail.
- a step of detecting a displacement of the surface a step of detecting the point as a starting point of a weld when the displacement detected at each predetermined pitch exceeds a predetermined threshold value a predetermined number of times, and at each predetermined pitch When the detected displacement is below the predetermined threshold continuously for a predetermined number of times, the step of detecting the point as the end point of the welded part, and the step of performing the heat treatment based on the detected position of the welded part, Including.
- the step of detecting the displacement of the rail surface at a predetermined pitch along the longitudinal direction of the rail it is desirable to detect the displacement by irradiating the rail surface with laser light and receiving the reflected light. .
- welding is performed when the displacement measured at a predetermined pitch along the length of the rail exceeds the threshold value a predetermined number of times continuously with respect to the welded portion of the rail that has been made a long rail by welding. It is determined as the start point of the welded portion, and when it is below the threshold value a predetermined number of times, it is determined as the end point of the welded portion.
- the center position of a welding part can be detected automatically and the suitable arrangement
- a stable quality rail can be obtained after post-heat treatment.
- the threshold value when the threshold value is exceeded a predetermined number of times, it is determined as the starting point of the welded portion, so that a narrow foreign object such as spatter is not erroneously detected. It is possible to detect with high accuracy even for the welded part.
- a post heat treatment apparatus and a post heat treatment method capable of automatically detecting a weld and performing heat treatment at an appropriate position of the rail in a post heat treatment apparatus for performing post heat treatment on the rail weld. can do.
- FIG. 1 is a plan view of a post heat treatment apparatus of the present invention.
- FIG. 2 is a side view of the post heat treatment apparatus of FIG.
- FIG. 3 is a cross-sectional view of the post-heat treatment apparatus of FIG.
- FIG. 4 is a perspective view of the first coil member and the second coil member in a separated state.
- FIG. 5 is a perspective view of a state in which the first coil member and the second coil member are joined.
- FIG. 6 is a flow showing a series of operations of the post-heat treatment apparatus according to the present invention.
- FIGS. 7A to 7C are state transition diagrams showing the operation of the laser displacement meter for detecting the welded portion.
- FIG. 8 is a side view schematically showing a laser displacement meter and a rail for explaining an operation of detecting a start point and an end point of a welded portion.
- FIGS. 9A to 9D are state transition diagrams for explaining the clamping operation for the first coil member and the second coil member for surrounding the periphery of the rail.
- FIG. 10 is a perspective view of rails connected by welding.
- the post-heat treatment apparatus and post-heat treatment method according to the present invention automatically detects the welded portion of the rail connected by welding, and further performs heat treatment, thereby remaining in the rail welded portion. This is for removing the residual tensile stress.
- FIG. 1 is a plan view of a post heat treatment apparatus of the present invention.
- 2 is a side view of the post heat treatment apparatus of FIG. 1
- FIG. 3 is a cross-sectional view taken along the line AA of FIG.
- the illustrated post-heat treatment apparatus 1 includes a first base 15 on which a rail R (target to be heat-treated) connected by welding is disposed above, and the rail R on the first base 15 (in the Y direction). And a pair of guide rails 2 laid.
- the post-heat treatment apparatus 1 includes a second base 3 that is supported by a slider 2 a that can move along the guide rail 2 and that is long in a direction orthogonal to the guide rail 2 (X direction).
- the second base 3 is movable along the longitudinal direction (Y direction) of the guide rail 2 by the slider 2a.
- the guide rail 2 includes, for example, a ball screw and a stepping motor that rotates the ball screw around its axis, and the slider 2a is moved by the rotation of the ball screw.
- the same configuration can be adopted for other guide rails and sliders that move along the guide rails.
- a pair of guide rails 4 and a pair of guard rails 5 are laid on the second base 3 on the left and right sides of the rail R in the direction orthogonal to the rail R (X direction), respectively.
- a box-shaped support base 6 is slidably provided via a slider 4a.
- a third base 7 is disposed on the support base 6, and a matching transformer device 8 (high-frequency current transformer) is supplied with a high-frequency current from a high-frequency inverter device (not shown) on the third base 7. Is arranged.
- One side surface (on the rail R side) of the matching transformer device 8 is provided with a support plate 22 having a conductive wire connected to its output terminal, and a plurality of coil supports which are a support plate 22 and a plate-like support member.
- the first coil member 10 ⁇ / b> A is supported by 9.
- the coil support 9 is made of a lightweight and high strength material such as FRP.
- the first coil member 10A Since the first coil member 10A is supported on one side of the matching transformer device 8 as described above, the first coil member 10A can move in the X direction along the guide rail 4 together with the matching transformer device 8, and can move forward and backward with respect to the rail R.
- the first coil member 10 ⁇ / b> A has one shape obtained by dividing the cross-sectional similarity of the rail R into two parts (in this embodiment, it is not symmetrical), and is close to the rail R. The periphery of one side can be covered with a predetermined interval.
- the matching transformer device 8 and the first coil member 10 ⁇ / b> A are electrically connected via a conductive wire provided in the support plate 22.
- a dog shaft 20 and a sensor 21 are provided on the third base 7 to detect an appropriate proximity position when the first coil member 10 ⁇ / b> A approaches the rail R. Yes.
- the dog shaft 20 is provided so as to protrude to the rail R side, and the sensor 21 detects the operation when its tip abuts against the rail R. Further, the position of the first coil member 10A when the sensor 21 is operated is the appropriate position.
- a rectangular plate-like fourth base 11 is horizontally arranged on the guide rail 5 via a slider 5a, and is slidable in the X direction.
- a bracket 12 extending in the vertical direction is provided on the fourth base 11, and the vertical surface 12a of the bracket 12 is directed to the rail R side as shown in FIGS. ing.
- Dog shafts 13 projecting to the rail R side are attached to four locations on the vertical surface 12a in the vertical and horizontal directions.
- a clamp attachment plate 14 is supported on the tip side of these four dog shafts 13. The clamp mounting plate 14 is held in a state where the one surface 14a is directed perpendicular to the rail R. The distance between the vertical surface 12 a of the bracket 12 and the clamp mounting plate 14 is appropriately set by the four dog shafts 13.
- hydraulic clamping devices 16 and 17 are provided at the upper and lower portions, respectively.
- the hydraulic clamping devices 16 and 17 have clamp arms 18 and 19, respectively, which can be rotated by link mechanisms 18a and 19a.
- a plurality of coil supports 32 made of, for example, FRP are attached to the central portion of the surface 14a of the clamp attachment plate 14, and the second coil member 10B is supported by the coil supports 32.
- the second coil member 10 ⁇ / b> B can move in the X direction along the guide rail 4, and can advance and retreat with respect to the rail R.
- the second coil member 10B has a shape similar to the cross-section of the rail R by being coupled to the first coil member 10A, and the two coil members 10B are connected to each other as shown in FIG.
- the surrounding area can be completely covered with the interval of
- a sensor 23 is attached to the bracket 12, and when the second coil member 10B comes close to the rail R and contacts the first coil member 10A, this is detected.
- the position of the second coil member 10B when the sensor 23 performs the detection operation is set to an appropriate position.
- a spring 24 is provided between the bracket 12 and the clamp mounting plate 14. For this reason, the second coil member 10B absorbs an impact when it comes into contact with the first coil member 10A.
- a guide rail 31 extending in the X direction via a bracket 30 is provided on the first base 3, and a laser is placed on a slider 31 a that slides along the guide rail 31.
- An arm 33 for holding a displacement meter 35 (displacement detection means) is provided.
- the laser light emitted by the laser displacement meter 35 is directed vertically downward, and the displacement can be measured by receiving the reflected wave.
- the laser displacement meter 35 can be moved in the Y direction by the guide rail 2, and can be moved in the X direction by the guide rail 31. Therefore, the laser displacement meter 35 can see the height displacement of the surface of the rail R across the rail R at any position in the length direction of the rail R.
- FIGS. 4 is a perspective view of the first coil member and the second coil member in a separated state
- FIG. 5 is a perspective view of a state in which the first coil member 10A and the second coil member 10B are joined.
- the first coil member 10A and the second coil member 10B are joined to form, for example, four one-turn induction heating coils 10a, 10b, 10c, and 10d (heating means).
- coil members 10a1, 10a2, 10b1, 10b2, 10c1, 10c2, 10d1, and 10d2 each made of a divided copper tube are provided.
- the upper ends of the coil members 10a1, 10b1, 10c1, 10d1 are fixed to a single square bar-like stay 25 for holding them in an aligned state, and the lower ends are in a state in which they are aligned. It is fixed to one square bar-like stay 26 for holding. Further, through holes 25 a are formed at both ends of the stay 25, and through holes 26 a are formed at both ends of the stay 26.
- the upper ends of the coil members 10a2, 10b2, 10c2, 10d2 are fixed to a single rectangular bar-like stay 27 for holding them in alignment, and the lower ends are held in alignment with each other. It is fixed to a single square bar-like stay 28. Further, positioning pins 27 a are provided at both ends of the stay 27, and positioning pins 28 a are provided at both ends of the stay 28.
- the upper ends of the coil members 10a1, 10b1, 10c1, and 10d1 on the first coil member 10A side are in contact with the upper ends of the coil members 10a2, 10b2, 10c2, and 10d2 on the second coil member 10B side, respectively.
- the lower ends of the coil members 10a1, 10b1, 10c1, 10d1 on the first coil member 10A side are in contact with the lower ends of the coil members 10a2, 10b2, 10c2, 10d2 on the second coil member 10B side, respectively.
- the positioning pins 27a at both ends of the stay 27 are inserted into the through holes 25a at both ends of the stay 25 on the coil upper end side, and the positioning pins 28a at both ends of the stay 28 are inserted into the through holes 26a at both ends of the stay 26 on the coil lower end side.
- the hydraulic clamp devices 16 and 17 are operated, and the clamp arm 18 presses the stay 25 toward the stay 27 side.
- the stay 26 is pressed against the stay 28 side.
- a silver plate member 29 is provided at the joint between the first coil member 10A and the second coil member 10B in order to ensure electrical connection.
- the silver plate member 29 is desirably provided so as to be replaceable in order to improve maintainability.
- the first coil member 10A and the second coil member 10B combined as described above form the four induction heating coils 10a, 10b, 10c, and 10d as described above. These heat the entire circumference of the rail R at a predetermined position by supplying a high-frequency current.
- the induction heating coils 10a, 10b, 10c, and 10d are disposed two on each side of the rail R with the welding center interposed therebetween, spaced apart from the welding center by a predetermined distance in the length direction. It will be.
- the post-heat treatment apparatus 1 includes a control unit 50 (control means) including a computer that detects the position of the rail welded portion W based on the detection result of the laser displacement meter 35 and performs overall operation control.
- the control unit 50 has, for example, an operation panel (such as a touch panel having an information display function) that can be operated by an operator, and can perform input setting of a threshold value of the bead height used for detection of the welded portion W. It is configured.
- the control unit 50 detects that the rail R is placed by a sensor (not shown) (step S1 in FIG. 6).
- the control unit 50 controls the slider 31a to move on the guide rail 31 toward the rail R (in the X direction) as shown in FIG. 7A in order to detect the welded portion W of the rail R.
- the laser from the laser displacement meter 35 is stopped at a position where it hits the top surface of the rail R, for example (step S2 in FIG. 6).
- the top surface of the rail R is irradiated with laser light, but any position other than the rail bottom surface may be used.
- the control unit 50 moves the slider 2a along the guide rail 2 at a predetermined speed. That is, as shown in FIG. 7B, the laser displacement meter 35 is controlled to move along the rail R in a state where the laser beam is applied to the top surface of the rail R (step S3 in FIG. 6).
- the control unit 50 can adjust the bead height as schematically shown in FIG.
- the previous measurement point is detected as the start point of the welded portion W (step S4 in FIG. 6).
- the previous measurement point is detected as the end of the weld W, as shown in FIG.
- the center of the start point and the end point is recognized as the welding center, and positioning in the rail length direction is performed (step S5 in FIG. 6).
- the control unit 50 first starts moving the first coil member 10A to the rail side from the state of FIG. As shown in FIG. 9B, when the dog shaft 20 comes into contact with the rail R, the sensor 21 is activated, and the movement of the first coil member 10A is stopped (step S6 in FIG. 6).
- control unit 50 starts moving the second coil member 10B to the rail R side, the second coil member 10B comes into contact with the first coil member 10A, and the positioning pin 27a of the stay 27 is inserted into the through hole 25a of the stay 25.
- the sensor 23 is activated and the movement of the second coil member 10B is stopped (step S7 in FIG. 6).
- the hydraulic clamp device 16 is operated, the clamp arm 18 is rotated by the link mechanism 18a, and the stay 25 side having the through hole 25a is pressed against the stay 27 side by the arm tip. (Clamp). Further, the hydraulic clamp device 17 is operated, the clamp arm 19 is rotated by the link mechanism 19a, and the stay 26 side having the through hole 26a is pressed (clamped) against the stay 28 side by the arm tip.
- the first coil member 10A and the second coil member 10B are firmly coupled, and the induction heating coils 10a, 10b, 10c, and 10d that cover the entire circumference of the rail R at predetermined positions. Is formed (step S8 in FIG. 6).
- two induction heating coils 10a, 10b, 10c, and 10d are provided on both sides of the center of the welded portion W of the rail R, and a predetermined distance (for example, 20 mm to 300 mm) from the welding center in the length direction. And the following). That is, the residual stress existing in the welded portion can be effectively reduced by heating at a high heating rate using the electromagnetic induction coil from a position separated from the welding center by a predetermined distance. In addition, since the induction heating coils 10a, 10b, 1c, and 10d heat the entire circumference of the rail R, an increase in residual stress in the length direction of the rail R can be suppressed.
- a high-frequency current is supplied from a high-frequency inverter device (not shown) to the matching transformer device 8, and the current transformed in the matching transformer device 8 is supplied to the induction heating coils 10a, 10b, 10c, and 10d.
- part of the rail R is induction-heated (step S9 of FIG. 6).
- step S10 in FIG. 6 the control unit 50 drives the hydraulic clamp devices 16 and 17 to rotate the clamp arms 18 and 19 to release the clamp (step S11 in FIG. 6). Then, the first coil member 10A and the second coil member 10B are retracted and separated from each other, and the operation is completed (step S12 in FIG. 6).
- laser welding is performed from the laser displacement meter 35 along the length direction of the rail R to the welded portion W of the rail R that has been made into a long rail by welding, and is performed in a predetermined manner.
- the displacement measured at the pitch exceeds the threshold value continuously for a predetermined number of times (for example, 5 times)
- the center position of the welding part W can be detected automatically, and the suitable arrangement
- the threshold value is continuously exceeded a predetermined number of times (for example, 5 times), it is determined as the start point of the welded portion W, so that a narrow foreign matter such as spatter is not erroneously detected, and laser light is used. By detecting the displacement, it is possible to detect the welding portion W having a low height with high accuracy.
- the present invention is not limited to this example.
- the present invention can also be applied to a case where a plurality of welded portions of the rails connected to each other are continuously detected and post-heat treated.
- the laser displacement meter 35 is used as the displacement detection means.
- the present invention is not limited to displacement detection using a laser, and can be realized by using other elements such as ultrasonic waves. it can.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
図10に基づき説明すると、少なくとも2本のレールR1、R2が、その端面間で溶接され、溶接部Wを有するレールRとなる。図10に示すようにレールRは、車輪との接触が生じる頭部r1、枕木と接する脚部r2、頭部r1と脚部r2とを連結する柱部r3を有する。
この装置によれば、電磁誘導コイルを用いた速い加熱速度の加熱により溶接部に存在する残留応力を効果的に低減することができる。
また、誘導加熱コイルがレールの全周を加熱するため、レールの長さ方向の残留応力の増加を抑制することができる。
しかしながら、レール溶接部Wの確認作業が前記のように目視など人的作業である場合には、経験を積んだ作業員でなければ適切な位置からのずれが生じる虞があり、後熱処理後の品質が安定しないという課題があった。
即ち、後熱処理後に安定した品質のレールを効率的に得るには、レール溶接部を自動的に検出し、溶接部中心を基準とする所定位置において自動的に誘電加熱コイルを配置し、加熱処理することが望ましい。
しかしながら、特許文献1に開示された装置にあっては、溶接部を自動的に検出し後熱処理する方法については開示されていなかった。
尚、前記変位検出手段は、レーザ光を前記レール表面に照射し、その反射光を受光することにより変位検出を行うことが望ましい。
これにより自動的に溶接部の中心位置を検出することができ、誘導加熱コイルの適切な配置場所を決定することができる。
また、適切な溶接部の位置の検出から溶接部の加熱処理までを自動的に行うことができるため、後熱処理後に安定した品質のレールを得ることができる。
また、閾値を所定回数連続して越える場合に溶接部の開始地点と判断するため、スパッタなどの幅の狭い異物を誤検出することがなく、また、レーザ光を用いた変位検出によって、低い高さの溶接部に対しても高精度に検出することができる。
尚、前記レールの長手方向に沿って所定ピッチ毎に該レール表面の変位を検出する工程において、レーザ光を前記レール表面に照射し、その反射光を受光することにより変位検出を行うことが望ましい。
これにより自動的に溶接部の中心位置を検出することができ、誘導加熱コイルの適切な配置場所を決定することができる。
また、適切な溶接部の位置の検出から溶接部の加熱処理までを自動的に行うことができるため、後熱処理後に安定した品質のレールを得ることができる。
また、閾値を所定回数連続して越える場合に溶接部の開始地点と判断するため、スパッタなどの幅の狭い異物を誤検出することがなく、また、レーザ光を用いた変位検出によって、低い高さの溶接部に対しても高精度に検出することができる。
図示する後熱処理装置1は、溶接によって連結されたレールR(被熱処理対象)が上方に配置される第一基台15と、前記第一基台15上にレールRと平行に(Y方向に)敷設された一対のガイドレール2とを備える。
尚、図示しないが、ガイドレール2内には、例えばボールねじとそれを軸周りに回転させるステッピングモータが内蔵され、前記ボールねじの回転によりスライダ2aが移動する構造となっている。また、以下の説明において、他のガイドレールとそれに沿って移動するスライダについても同様の構成を採用することができる。
一対のガイドレール4上には、スライダ4aを介して箱形の支持台6がスライド移動可能に設けられている。また、支持台6の上には、第三基台7が配置され、この第三基台7上には図示しない高周波インバータ装置から高周波電流が供給される整合トランス装置8(高周波変流器)が配置されている。
前記第1コイル部材10Aは、図3に示すようにレールRの断面相似形を2分割した一方の形(本実施形態では左右対称ではない)を有しており、レールRに近接することにより、その片側周囲を、所定間隔を空けて覆うことができるようになっている。前記整合トランス装置8と第1コイル部材10Aとは前記支持板22に内設された導電線を介して電気的に接続されている。
前記ドグシャフト20は、レールR側に突出して設けられ、その先端がレールRに当接することによりセンサ21が検出動作するようになっている。また、センサ21が動作した際の第1コイル部材10Aの位置が、その適切な位置とされる。
また、前記クランプ取り付け板14の面14aにおいて、その中央部には、例えばFRPからなる複数のコイルサポート32が取り付けられ、それらコイルサポート32によって第2コイル部材10Bが支持されている。第2コイル部材10Bはガイドレール4に沿ってX方向に移動可能とされ、レールRに対し進退可能とされている。
また、前記ブラケット12には、センサ23が取り付けられており、第2コイル部材10BがレールRに近接し、第1コイル部材10Aに当接すると、これを検出するようになっている。センサ23が検出動作した際の第2コイル部材10Bの位置が適切な位置とされる。
また、前記ブラケット12とクランプ取り付け板14との間にはスプリング24が設けられている。そのため、第2コイル部材10Bが第1コイル部材10Aに当接した際の衝撃を吸収するようになされている。
この構成において、レーザ変位計35は、ガイドレール2によりY方向に移動可能であり、ガイドレール31によりX方向に移動可能となっている。そのため、レーザ変位計35は、レールRの長さ方向のいずれの位置においてもレールRの上を横切って、レールR表面の高さ変位を見ることができる。
図4、図5に示すように第1コイル部材10Aと第2コイル部材10Bとは接合した状態で例えば4つの一巻きの誘導加熱コイル10a、10b、10c、10d(加熱手段)を形成するように、それぞれ分割された銅管からなるコイル部材10a1、10a2、10b1、10b2、10c1、10c2、10d1、10d2を有している。
尚、前記貫通孔25a、26aに位置決めピン27a、28aが挿入された状態で、前記の油圧クランプ装置16、17が作動し、クランプアーム18によりステー25をステー27側に押さえ付け、クランプアーム19によりステー26をステー28側に押さえ付けるようになっている。
また、第1コイル部材10Aと第2コイル部材10Bとの接合部には、電気的接続を確実なものとするために銀板部材29が設けられている。この銀板部材29はメンテナンス性向上のために取替自在に設けられることが望ましい。
これらの誘導加熱コイル10a、10b、10c、10dを使用する際には、レールRの溶接中心を挟んだ両側にそれぞれ2つずつ、この溶接中心から長さ方向に所定距離離間して配置されることになる。
制御部50は、例えば作業員が操作できる操作パネル(情報表示機能を備えたタッチパネルなど)を有し、溶接部Wの検出に用いるビード高さの閾値の入力設定などを行うことができるように構成されている。
先ず、後熱処理装置1上に被後熱処理対象であるレールRが配置されると、制御部50は、図示しないセンサによりレールRが配置されたことを検出する(図6のステップS1)。
レーザ変位計35のX方向の位置が決定すると、制御部50はスライダ2aをガイドレール2に沿って所定速度で移動させる。即ち、図7(b)に示すようにレーザ変位計35がレールRの頭頂面に対しレーザ光を当てた状態でレールRに沿って移動するよう制御する(図6のステップS3)。
その後、ビード高さ閾値tよりも小さな変化が5回(5pの長さ分)連続した場合に、5つ前の測定地点を溶接部Wの終了として検出し、図7(c)に示すようにそれら開始地点と終了地点の中央を溶接中心と認識してレール長さ方向の位置決めを行う(図6のステップS5)。
また、ビード高さ閾値tよりも大きな変化が5pの長さ続いた場合に溶接部Wを認識するため、図8に示すスパッタなどの幅の小さい異物の誤検出を防止することができる。
図9(b)に示すようにドグシャフト20がレールRに当接するとセンサ21が作動し、第1コイル部材10Aの移動が停止される(図6のステップS6)。
これにより図9(d)に示すように、強固に第1コイル部材10Aと第2コイル部材10Bとが結合され、レールRの所定位置の全周を覆う誘導加熱コイル10a、10b、10c、10dが形成される(図6のステップS8)。
そして、第1コイル部材10Aと第2コイル部材10Bとをそれぞれ後退させて分離し、作業完了となる(図6のステップS12)。
これにより自動的に溶接部Wの中心位置を検出することができ、誘導加熱コイルの適切な配置場所を決定することができる。
また、適切な溶接部Wの位置の検出から溶接部Wの加熱処理までを自動的に行うことができるため、後熱処理後に安定した品質のレールRを得ることができる。
また、閾値を所定回数(例えば5回)連続して越える場合に溶接部Wの開始地点と判断するため、スパッタなどの幅の狭い異物を誤検出することがなく、また、レーザ光を用いた変位検出によって、低い高さの溶接部Wに対しても高精度に検出することができる。
また、本実施の形態においては、変位検出手段としてレーザ変位計35を用いるものとしたが、レーザを用いた変位検出に限定されず、超音波等、その他の素子を用いても実現することができる。
2 ガイドレール
2a スライダ
3 第二基台
4 ガイドレール
5 ガイドレール
6 支持台
7 第三基台
8 整合トランス装置
9 コイルサポート
10A 第1コイル部材
10B 第2コイル部材
10a 誘導加熱コイル(加熱手段)
10b 誘導加熱コイル(加熱手段)
10c 誘導加熱コイル(加熱手段)
10d 誘導加熱コイル(加熱手段)
11 第四基台
12 ブラケット
13 ドグシャフト
14 クランプ取り付け板
15 第一基台
16 油圧クランプ装置
17 油圧クランプ装置
18 クランプアーム
18a リンク機構
19 クランプアーム
19a リンク機構
20 ドグシャフト
21 センサ
22 支持板
23 センサ
24 スプリング
25 ステー
25a 貫通孔
26 ステー
26a 位置決めピン
27 ステー
27a 貫通孔
28 ステー
28a 位置決めピン
29 銀板部材
30 ブラケット
31 ガイドレール
31a スライダ
32 コイルサポート
33 アーム
35 レーザ変位計(変位検出手段)
50 制御部(制御手段)
R レール
W 溶接部
Claims (4)
- 溶接されたレールの後熱処理を行う後熱処理装置であって、
前記レールの長手方向に沿って所定ピッチ毎に該レール表面の変位を検出する変位検出手段と、
前記変位検出手段が所定ピッチ毎に検出した変位が、所定の閾値を所定回数連続して越える場合に溶接部の開始地点と判断し、前記所定の閾値を所定回数連続して下回る場合に溶接部の終了地点と判断する制御手段と、
前記制御手段により検出された溶接部の位置に基づき加熱処理を行う加熱手段と、
を備えることを特徴とする後熱処理装置。 - 前記変位検出手段は、レーザ光を前記レール表面に照射し、その反射光を受光することにより変位検出を行うことを特徴とする請求項1に記載された後熱処理装置。
- 溶接されたレールの後熱処理を行う後熱処理方法であって、
前記レールの長手方向に沿って所定ピッチ毎に該レール表面の変位を検出する工程と、
前記所定ピッチ毎に検出した変位が、所定の閾値を所定回数連続して越える場合に、その地点を溶接部の開始地点として検出する工程と、
前記所定ピッチ毎に検出した変位が、前記所定の閾値を所定回数連続して下回る場合に、その地点を溶接部の終了地点として検出する工程と、
前記検出された溶接部の位置に基づき加熱処理を行う工程と、
を含むことを特徴とする後熱処理方法。 - 前記レールの長手方向に沿って所定ピッチ毎に該レール表面の変位を検出する工程において、
レーザ光を前記レール表面に照射し、その反射光を受光することにより変位検出を行うことを特徴とする請求項3に記載された後熱処理方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2019103241A RU2019103241A (ru) | 2016-07-27 | 2017-06-13 | Способ и устройство для посттермической обработки |
US16/318,040 US11365458B2 (en) | 2016-07-27 | 2017-06-13 | Post-heating treatment device and post-heating treatment method |
AU2017304971A AU2017304971B2 (en) | 2016-07-27 | 2017-06-13 | Post-heat treatment device and post-heat treatment method |
CA3031907A CA3031907A1 (en) | 2016-07-27 | 2017-06-13 | Post-heating treatment device and post-heating treatment method |
JP2018511168A JP6324650B1 (ja) | 2016-07-27 | 2017-06-13 | 後熱処理装置及び後熱処理方法 |
BR112019001382A BR112019001382A2 (pt) | 2016-07-27 | 2017-06-13 | dispositivo de tratamento pós aquecimento e método de tratamento pós aquecimento |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016147354 | 2016-07-27 | ||
JP2016-147354 | 2016-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018020872A1 true WO2018020872A1 (ja) | 2018-02-01 |
Family
ID=61017369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/021740 WO2018020872A1 (ja) | 2016-07-27 | 2017-06-13 | 後熱処理装置及び後熱処理方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US11365458B2 (ja) |
JP (1) | JP6324650B1 (ja) |
AU (1) | AU2017304971B2 (ja) |
BR (1) | BR112019001382A2 (ja) |
CA (1) | CA3031907A1 (ja) |
RU (1) | RU2019103241A (ja) |
WO (1) | WO2018020872A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2017304972B2 (en) * | 2016-07-27 | 2020-01-30 | Dai-Ichi High Frequency Co., Ltd. | Post-heat treatment device and post-heat treatment method |
CN117070737A (zh) * | 2023-07-14 | 2023-11-17 | 常州中车瑞泰装备科技有限公司 | 一种轨道焊接热处理一体机及其作业操控方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5225687A (en) * | 1975-08-21 | 1977-02-25 | Nippon Steel Corp | Method of detecting weld zones of seamwelded steel pipes |
JPH04371523A (ja) * | 1991-06-18 | 1992-12-24 | Sumitomo Metal Ind Ltd | 電縫鋼管溶接部の熱処理装置 |
JPH11304985A (ja) * | 1998-04-27 | 1999-11-05 | Toshiba Corp | ジェットポンプ保全装置 |
JP2001105158A (ja) * | 1999-10-13 | 2001-04-17 | Daido Steel Co Ltd | 鉄道レール拡散接合用誘導加熱コイル、およびそれを用いた鉄道レールの拡散接合方法 |
JP2014101533A (ja) * | 2012-11-16 | 2014-06-05 | Nippon Steel & Sumitomo Metal | 後熱処理装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3632952A1 (de) | 1986-09-27 | 1988-04-07 | Hoesch Ag | Verfahren und vorrichtung zur kontinuierlichen herstellung rohrfoermiger koerper mittels laser-laengsnahtschweissung |
TW277013B (ja) * | 1994-07-29 | 1996-06-01 | Hitachi Shipbuilding Eng Co | |
US5650852A (en) * | 1996-03-08 | 1997-07-22 | The Boeing Company | Temperature-compensated laser measuring method and apparatus |
US6299050B1 (en) * | 2000-02-24 | 2001-10-09 | Hitachi, Ltd. | Friction stir welding apparatus and method |
RU59058U1 (ru) | 2006-06-26 | 2006-12-10 | Общество с ограниченной ответственностью (ООО) "Магнит" | Установка термической обработки сварных стыков рельсов в стационарных технологических условиях |
JP4987816B2 (ja) | 2008-07-28 | 2012-07-25 | 新日本製鐵株式会社 | 溶接継手の疲労特性を改善する自動打撃処理方法及び自動打撃処理装置 |
US9334546B2 (en) | 2011-11-29 | 2016-05-10 | Evraz Inc. Na Canada | Method and apparatus for treatment of a rail weld |
JP5477453B1 (ja) | 2012-11-16 | 2014-04-23 | 新日鐵住金株式会社 | 後熱処理装置 |
CA2880953C (en) | 2012-11-16 | 2017-10-10 | Nippon Steel & Sumitomo Metal Corporation | Stress-relief heat treatment apparatus comprising induction heating coils |
US9375808B2 (en) * | 2013-09-16 | 2016-06-28 | Lincoln Global, Inc. | Welding and cutting laser displacement compensation system |
-
2017
- 2017-06-13 WO PCT/JP2017/021740 patent/WO2018020872A1/ja active Application Filing
- 2017-06-13 US US16/318,040 patent/US11365458B2/en active Active
- 2017-06-13 CA CA3031907A patent/CA3031907A1/en not_active Abandoned
- 2017-06-13 AU AU2017304971A patent/AU2017304971B2/en active Active
- 2017-06-13 RU RU2019103241A patent/RU2019103241A/ru not_active Application Discontinuation
- 2017-06-13 BR BR112019001382A patent/BR112019001382A2/pt not_active Application Discontinuation
- 2017-06-13 JP JP2018511168A patent/JP6324650B1/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5225687A (en) * | 1975-08-21 | 1977-02-25 | Nippon Steel Corp | Method of detecting weld zones of seamwelded steel pipes |
JPH04371523A (ja) * | 1991-06-18 | 1992-12-24 | Sumitomo Metal Ind Ltd | 電縫鋼管溶接部の熱処理装置 |
JPH11304985A (ja) * | 1998-04-27 | 1999-11-05 | Toshiba Corp | ジェットポンプ保全装置 |
JP2001105158A (ja) * | 1999-10-13 | 2001-04-17 | Daido Steel Co Ltd | 鉄道レール拡散接合用誘導加熱コイル、およびそれを用いた鉄道レールの拡散接合方法 |
JP2014101533A (ja) * | 2012-11-16 | 2014-06-05 | Nippon Steel & Sumitomo Metal | 後熱処理装置 |
Also Published As
Publication number | Publication date |
---|---|
RU2019103241A (ru) | 2020-08-27 |
US11365458B2 (en) | 2022-06-21 |
JP6324650B1 (ja) | 2018-05-16 |
JPWO2018020872A1 (ja) | 2018-08-02 |
BR112019001382A2 (pt) | 2019-04-30 |
AU2017304971B2 (en) | 2019-05-16 |
CA3031907A1 (en) | 2018-02-01 |
AU2017304971A1 (en) | 2019-01-31 |
RU2019103241A3 (ja) | 2020-08-27 |
US20190233909A1 (en) | 2019-08-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6383511B2 (ja) | 後熱処理装置及び後熱処理方法 | |
EP2805800B1 (de) | Fügen eines Werkstücks mit versteckter Fügenaht | |
JP6324650B1 (ja) | 後熱処理装置及び後熱処理方法 | |
KR101382867B1 (ko) | 용접다이 | |
KR20150137421A (ko) | 용접부 검사 시스템 및 그 제어방법 | |
CN112157396A (zh) | 一种用于管件的焊接装置 | |
JP5523045B2 (ja) | コイルの製造装置及び製造方法 | |
JP2000288789A (ja) | 溶接ビード研削装置 | |
KR19980063169A (ko) | 강판의 곡면 가공 방법과 그 장치 | |
US3036204A (en) | Welding machine | |
KR102041681B1 (ko) | 타원궤적 추종형 레이저 융착장치 | |
Kim et al. | A study of a dual-electromagnetic sensor system for weld seam tracking of I-butt joints | |
CN213497490U (zh) | 一种用于管件的焊接装置 | |
JP3596585B2 (ja) | 板金ワークのプリキュア装置 | |
KR101066811B1 (ko) | 자동용접장치 | |
US6720517B2 (en) | Resistance welding head and resistance welding apparatus and method using the head | |
RU2366550C1 (ru) | Машина для контактной стыковой сварки рельсов | |
KR101941417B1 (ko) | 레이저 용접부에 있어서의 구멍 검출 방법 및 레이저 용접 장치 | |
EP2335861A1 (en) | Method and apparatus for joining panels constituting components of motor-vehicle bodies, with quality control through thermographic detection of the entire extension of edges | |
RU71924U1 (ru) | Машина для контактной стыковой сварки рельсов | |
JP7520559B2 (ja) | スポット溶接装置及びスポット溶接方法 | |
JP2016221525A (ja) | 自動予熱装置 | |
JP2850696B2 (ja) | アプセット溶接装置 | |
IT202100029039A1 (it) | Dispositivo e metodo per eseguire il controllo non distruttivo di una rotaia | |
JP2008055492A5 (ja) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2018511168 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17833882 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3031907 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2017304971 Country of ref document: AU Date of ref document: 20170613 Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112019001382 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112019001382 Country of ref document: BR Kind code of ref document: A2 Effective date: 20190123 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 17833882 Country of ref document: EP Kind code of ref document: A1 |