JP2019141854A - Manufacturing method and manufacturing apparatus of laminated molding - Google Patents

Abstract

To provide a manufacturing method and a manufacturing apparatus of a laminated molding capable of manufacturing a high-quality laminated molding by suppressing dispersion of strength by uniformizing a solidification structure, and by removing an oxide film excellently.SOLUTION: There is provided a manufacturing method of a laminated molding for molding a laminated molding W by forming and laminating, by a torch 17, a weld bead 25 formed by melting and solidifying a filler material M; for performing a temperature monitoring processing for monitoring a temperature of the weld bead 25 formed by the torch 17, and a peening processing for allowing an impact tool 43 to follow the torch 17 at a first interval L1 based on the temperature of the weld bead 25, and impacting the weld bead 25.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for manufacturing a layered object and a manufacturing apparatus.

  In recent years, the need for 3D printers as production means has increased, and research and development have been conducted for practical application in the aircraft industry and the like, particularly for application to metal materials. A 3D printer using a metal material uses a heat source such as a laser or an arc to melt a metal powder or a metal wire, and laminates the molten metal to form a model.

  2. Description of the Related Art Conventionally, there has been known a technique in which fatigue strength is improved by refining a structure by performing peening for each layer of weld metal of multi-layer welding (for example, see Patent Document 1). Further, when ultrasonic inspection of the weld metal in the groove is performed, in order to prevent the inspection property from being deteriorated by the structure of the weld metal, it is also known that the weld metal is peened after each layer is welded. (For example, refer to Patent Document 2).

JP-A-1-202390 Japanese Patent No. 3160514

By the way, since the layered object is manufactured by solidification of the molten metal, the strength varies due to the variation of the solidified structure. Further, when the generated oxide film cannot be melted at the time of forming the next layer, the oxide film is entangled in the molten metal and becomes an inclusion, resulting in a decrease in strength. Further, since the weld bead has irregularities on the surface, it is difficult to inspect internal defects such as ultrasonic flaw detection, and flattening by surface grinding is necessary.
The methods described in Patent Documents 1 and 2 do not consider molten metal formed by additive manufacturing.

  The present invention has been made in view of the above-described circumstances, and its purpose is to homogenize a solidified structure to suppress variation in strength, and further to remove an oxide film satisfactorily to obtain a high-quality layered object. It is in providing the manufacturing method and manufacturing apparatus of the laminate-molded article which can be manufactured. Another object is to provide a manufacturing method and manufacturing apparatus for a layered object that can avoid a failure due to a high temperature of a nondestructive inspection tool.

The present invention has the following configuration.
(1) A method for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it.
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
A peening process in which a striking tool is made to follow the torch with a first interval based on the temperature of the welding bead, and the welding bead is hit;
The manufacturing method of the layered object to perform.
(2) An apparatus for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A striking tool provided to follow the torch at a first interval based on the temperature of the welding bead and striking the welding bead;
An apparatus for manufacturing a layered object comprising:
(3) A method for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it.
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
Flaw detection inspection processing for flaw detection inspection of the weld bead by following a non-destructive inspection tool with respect to the torch at a second interval based on the temperature of the weld bead;
The manufacturing method of the layered object to perform.
(4) An apparatus for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A non-destructive inspection tool which is provided so as to be able to follow the torch with a second interval based on the temperature of the weld bead, and which performs a flaw detection inspection on the weld bead;
An apparatus for manufacturing a layered object comprising:

  According to the manufacturing method and manufacturing apparatus for a layered object of the present invention, it is possible to produce a high-quality layered object by uniformizing a solidified structure and suppressing variation in strength, and further removing an oxide film well. it can.

  Moreover, according to the manufacturing method and manufacturing apparatus of the other layered object of this invention, the failure by the high temperature of a nondestructive inspection tool can be avoided.

It is a typical schematic block diagram of the manufacturing system which is a manufacturing apparatus of the laminate-molded article of this invention. It is a schematic block diagram explaining a bead processing device. It is a schematic block diagram of the striking tool explaining a striking tool. It is a perspective view of the laminate-molded article which laminated | stacked the welding bead layer. It is a schematic side view of a part of a weld bead in the middle of formation illustrating a peening process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a manufacturing system which is a manufacturing apparatus for a layered object according to the present invention. FIG. 2 is a schematic configuration diagram illustrating a bead processing device.

  The manufacturing system 100 having this configuration includes an additive manufacturing apparatus 11, a bead processing apparatus 16, and a controller 15 that performs overall control of the additive manufacturing apparatus 11 and the bead processing apparatus 16.

  The additive manufacturing apparatus 11 includes a welding robot 19 having a torch 17 on a tip shaft, and a filler material supply unit 21 that supplies a filler material (welding wire) M to the torch 17. The torch 17 holds the filler material M in a state protruding from the tip.

  The controller 15 includes a CAD / CAM unit 31, a trajectory calculation unit 33, a storage unit 35, and a control unit 37 to which these are connected.

  The welding robot 19 is an articulated robot, and the filler material M is supported on the torch 17 provided on the tip shaft so as to be continuously supplied. The position and orientation of the torch 17 can be arbitrarily set three-dimensionally within the range of the degree of freedom of the robot arm.

  The torch 17 has a shield nozzle (not shown), and shield gas is supplied from the shield nozzle. The arc welding method used in this configuration may be either a consumable electrode type such as covering arc welding or carbon dioxide arc welding, or a non-consumable electrode type such as TIG welding or plasma arc welding. It is selected appropriately according to.

  For example, in the case of the consumable electrode type, a contact tip is disposed inside the shield nozzle, and a filler material M to which a molten current is fed is held by the contact tip. The torch 17 generates an arc from the tip of the filler material M in a shield gas atmosphere while holding the filler material M. The melt material M is fed from the melt material supply unit 21 to the torch 17 by a feed mechanism (not shown) attached to a robot arm or the like. When the melt material M that is continuously fed is melted and solidified while moving the torch 17, a linear weld bead 25 that is a melt-solidified body of the melt material M is formed.

  The heat source for melting the filler material M is not limited to the arc described above. For example, a heat source using other methods such as a heating method using both an arc and a laser, a heating method using plasma, and a heating method using an electron beam or a laser may be adopted. When heating by an electron beam or a laser, the amount of heating can be controlled more finely, the state of the weld bead can be maintained more appropriately, and the quality of the laminated structure can be further improved.

  The CAD / CAM unit 31 generates shape data of the model W to be produced, and then generates layer shape data representing the shape of each layer by dividing the data into a plurality of layers. The trajectory calculation unit 33 obtains the movement trajectory of the torch 17 based on the generated layer shape data. The storage unit 35 stores data such as the generated layer shape data and the movement trajectory of the torch 17.

  The control unit 37 drives the welding robot 19 by executing a drive program based on the layer shape data stored in the storage unit 35 and the movement trajectory of the torch 17. That is, the welding robot 19 moves the torch 17 while melting the filler metal M with an arc based on the movement trajectory of the torch 17 generated by the trajectory calculation unit 33 according to a command from the controller 15. FIG. 1 shows a state in which a layered object W is formed by forming a weld bead 25 on the upper surface of a plate-like base plate 20 arranged on a horizontal plane.

  As shown in FIG. 2, the bead processing device 16 includes a temperature detection sensor 41, an impact tool 43, and an ultrasonic flaw detection probe (nondestructive inspection tool) 45. The bead processing device 16 is connected to the controller 15 and is controlled by the controller 15.

  The temperature detection sensor 41 detects the temperature of the welding bead 25 formed by the torch 17 from the upper side. The temperature detection sensor 41 can move following the torch 17. For example, the temperature detection sensor 41 may be mounted on the torch 17 at a position where the temperature of the weld bead 25 can be detected.

  The striking tool 43 strikes and welds the welding bead 25 formed by the torch 17 from its upper surface. The striking tool 43 is movable following the torch 17. As shown in FIG. 3, the striking tool 43 includes a cooling mechanism 51. The cooling mechanism 51 has a flow path 53 that is opened on the tip side of the impact tool 43, and cooling gas is supplied to the flow path 53. The cooling mechanism 51 cools a cooling gas by spraying a location where the hitting tool 43 hits the welding bead 25. In addition, as the cooling mechanism 51, you may cool a striking location by cooling the striking tool 43 itself with cooling gas or cooling water.

The ultrasonic flaw detection probe 45 detects ultrasonic waves incident on the welding bead 25 formed by the torch 17. The ultrasonic flaw detection probe 45 is a nondestructive inspection tool that performs flaw detection inspection of the weld bead 25 based on the detected ultrasonic waves. The ultrasonic flaw detection probe 45 can move following the torch 17.
That is, the torch 17, the hitting tool 43, and the ultrasonic flaw detection probe 45 are arranged in the above order along the weld bead 25 to be formed. Moreover, the hit | damage tool 43 is arrange | positioned so that adjustment of the 1st space | interval L1 mentioned later with the torch 17 is possible. Furthermore, it is preferable that the ultrasonic flaw detection probe 45 is also arranged to be adjustable with respect to the torch 17 with a second interval L2 described later.

  The manufacturing system 100 having the above configuration melts the melt material M while moving the torch 17 by driving the welding robot 19 along the movement trajectory of the torch 17 generated from the set layer shape data. The filler material M is supplied onto the base plate 20. As a result, as shown in FIG. 4, a weld bead layer 34 in which a plurality of linear weld beads 25 are arranged in a row is formed on the base plate 20, and the weld bead layer 34 is laminated in a plurality of layers. The layered object W is formed.

  In this embodiment, when forming the weld bead 25 that constitutes the layered object W by the manufacturing system 100, the controller 15 controls the bead processing device 16, and performs temperature monitoring processing, peening processing, cooling processing, and flaw detection inspection processing. Do.

  Next, temperature monitoring processing, peening processing, cooling processing, and flaw detection inspection processing by the controller 15 when forming the weld bead 25 will be described. Here, a case where the first weld bead 25 is formed on the base plate 20 will be described as an example.

(Temperature monitoring process)
When the torch 17 moves on the upper surface of the base plate 20 arranged horizontally to form the weld bead 25, the controller 15 performs a temperature monitoring process for detecting the temperature of the weld bead 25 by the temperature detection sensor 41 (FIG. 2). reference). Then, the temperature data of the weld bead 25 detected by the temperature detection sensor 41 is transmitted to the controller 15.

(Peening process)
As shown in FIG. 5, the controller 15 causes the hitting tool 43 to follow the torch 17 with a first interval L1 based on the temperature data from the temperature detection sensor 41, and the hitting tool 43 allows the welding bead 25 to be A peening process is performed to hit the top surface.

  The first interval L1 in this peening process is the interval between the formation location A of the weld bead 25 by the torch 17 and the impact location B of the weld bead 25 by the impact tool 43, and is based on the temperature data from the temperature detection sensor 41. Is set. For example, in the case of modeling mild steel (for example, a material equivalent to SM490), the first interval L1 is an interval at which the temperature of the weld bead 25 is in the range of 400 ° C. to 800 ° C. at the hitting point B with respect to the torch 17. It may be set as appropriate.

  Here, if the temperature of the weld bead 25 at the hitting point B is lower than 400 ° C., the Young's modulus and yield stress of the weld bead 25 are too high at 90% or more with respect to the Young's modulus and yield stress at normal temperature, and the impact tool It becomes difficult to flatten the weld bead 25 by hitting 43. Also, if the welding bead temperature at the hitting point B is higher than 800 ° C., the Young's modulus and yield stress of the welding bead 25 are less than half of the Young's modulus and yield stress at room temperature and are too low. As a result, the weld bead 25 is deformed more than necessary.

Note that the temperature of the weld bead 25 at the striking location B is calculated and calculated from the detected temperature in consideration of the cooling rate to the striking location B according to the distance from the striking location B of the temperature detection sensor 41, for example. .
The first distance L1 is intended to be the length of the weld bead 25 formed between the two positions of the weld bead 25 where the torch 17 and the striking tool 43 face each other. For example, in the case of the linear welding bead 25 as in the present embodiment, the distance between the torch 17 and the hitting tool 43 and the length of the welding bead 25 substantially match.

  In the peening process, the target height H1 of hitting the weld bead 25 by the hitting tool 43 is set to a height obtained by adding the expected height of the weld bead 25 to the target height H2 of the weld bead 25 by the torch 17. . When the first-layer weld bead 25 is formed, the target height H <b> 2 of the weld bead 25 is the upper surface height position of the base plate 20. In the case where the weld bead 25 is formed on the upper surface of the already formed weld bead layer 34, the target height H2 of the weld bead 25 is the height of the upper surface of the previous weld bead layer 34. Further, when the welding bead 25 is hit with the hitting tool 43, the welding bead 25 is deformed by the load of the hitting tool 43. The bead 25 has a formation height H3 that is lower by the amount of deformation. That is, by performing this peening process, the welding bead 25 is set to a height H3 corresponding to one set height, and the upper surface thereof is flattened.

(Cooling process)
In the peening process to the welding bead 25 by the hitting tool 43, the cooling mechanism 51 performs a cooling process for cooling the hitting point B to the welding bead 25 by the hitting tool 43.

(Flaw detection inspection process)
An ultrasonic flaw detection probe 45 that is a nondestructive inspection tool is caused to follow the impact tool 43. Then, with this ultrasonic flaw detection probe 45, flaw detection inspection processing for flaw detection inspection of the weld bead 25 after peening is performed. In this flaw detection processing, an ultrasonic current (several kHz to several tens of kHz) is superimposed on the current applied to melt the filler material M on the torch 17, thereby generating between the welding torch and the layered object W. The welding arc to be oscillated in accordance with the intensity and frequency of the ultrasonic current, and ultrasonic waves are incident on the weld bead 25 to be formed. For example, when a pulse current is applied to melt the filler material M, an ultrasonic current is superimposed in a period in which the base current is applied. Then, the ultrasonic flaw detection probe 45 that follows the striking tool 43 detects the ultrasonic wave incident on the welding bead 25, and the flaw detection inspection of the welding bead 25 is performed based on the detected ultrasonic wave. At this time, since the upper surface of the weld bead 25 is flattened, flaw detection in the weld bead 25 can be performed with high accuracy.

As shown in FIG. 2, it is preferable that the ultrasonic flaw detection probe 45 be arranged at a second interval L2 or more with respect to the torch 17 in order to avoid a failure due to heat from the weld bead 25.
Further, the second interval L2 is also intended to be a length in which the weld bead 25 is formed between two positions of the weld bead 25 where the torch 17 and the ultrasonic flaw detection probe 45 face each other.
Moreover, since the temperature of the welding bead 25 at the position where the ultrasonic flaw detection probe 45 faces is lowered by cooling the hitting point B by the cooling mechanism 51 of the hitting tool 43, the ultrasonic flaw detection probe 45 and the hitting tool 43 The third interval L3 can be set short, and the second interval L2 can also be set short.

The ultrasonic flaw detection probe 45 may have only an ultrasonic reception function or may have an ultrasonic transmission function.
Further, when the ultrasonic flaw detection probe 45 having an ultrasonic wave transmission / reception function is made to follow, it is not necessary to superimpose the ultrasonic current. In this case, the ultrasonic flaw detection probe 45 causes the ultrasonic wave to enter the welding bead. At the same time, the ultrasonic waves are detected.
Further, the ultrasonic flaw detection probe 45 is preferably a non-contact type probe such as EMAT or a contact type probe equipped with an elastic body.

  As described above, according to the method and apparatus for manufacturing a layered object according to the present embodiment, the temperature of the weld bead 25 formed by the torch 17 is monitored, and the temperature based on the temperature of the weld bead 25 is measured. By striking the welding bead 25 with the striking tool 43 following the torch 17 with an interval of L1, the crystal grains of the welding bead 25 are refined to make the solidified structure uniform, and variations in strength occur. In addition, the oxide film can be satisfactorily removed.

  Further, the upper surface of the welding bead 25 formed by the torch 17 can be flattened by hitting with the hitting tool 43, so that the formation of the welding bead 25 of the next layer can be stabilized and the forming accuracy can be improved. Therefore, the flaw detection in the weld bead 25 can be performed with high accuracy from the upper surface. Thereby, the quality of the layered object W to be manufactured can be improved.

  In particular, in the peening process, the target height H1 of the hit by the hitting tool 43 is set to a position obtained by adding the target height H2 of the torch 17 to the expected height of the weld bead 25 to be formed. The upper surface can be evenly flattened, and the welding bead 25 of the next layer can be formed more stably and with high accuracy.

  Further, in the peening process, by performing a cooling process for cooling the hitting point B on the welding bead 25 by the hitting tool 43, the time until the welding bead 25 of the next layer is solidified can be shortened. Therefore, since the temperature of the weld bead 25 in the previous layer is high, the shape defect due to dripping or the like caused by the time until the weld bead 25 in the next layer is solidified is suppressed. Thereby, the quality of the layered product W can be improved and the modeling efficiency can be increased.

  Further, since the flaw detection inspection process for flaw detection inspection of the weld bead 25 after the peening process is performed by causing the ultrasonic flaw detection probe 45 that is a nondestructive inspection tool to follow the striking tool 43, the welding flattened by the striking tool 43. The flaw detection of the weld bead 25 can be accurately inspected by the ultrasonic flaw detection probe 45 on the upper surface of the bead 25.

  Further, the ultrasonic flaw detection probe 45 is provided on the torch 17 so as to be able to follow the second gap L2 or more so that a failure due to the high temperature of the ultrasonic flaw detection probe 45 can be avoided.

  In particular, in the flaw detection inspection process, an ultrasonic flaw detection probe that is a nondestructive inspection tool can be used without superimposing an ultrasonic current on the welding bead 25 by superimposing an ultrasonic current on the current applied to the torch 17. The flaw detection inspection of the weld bead 25 can be easily performed by 45.

  It should be noted that the present invention is not limited to the above-described embodiments, and those skilled in the art can change or apply the configurations of the embodiments to each other or based on the description of the specification and well-known techniques. Is also within the scope of the present invention, which is intended to be protected.

For example, the ultrasonic flaw detection probe 45 may be disposed at a location where ultrasonic waves incident on the weld bead 25 such as the back surface of the base plate 20 can be detected.
Moreover, in the said embodiment, although the ultrasonic current is superimposed on the electric current applied to the torch 17, this invention is not restricted to this, The separate apparatus which generates an ultrasonic wave and injects into the welding bead 25 is provided. Alternatively, the ultrasonic flaw detection probe 45 may generate ultrasonic waves and enter the welding bead 25 to perform flaw detection on the welding bead 25.

  Furthermore, the temperature detection sensor 41 may detect the temperature of the welding bead 25 at any position between the torch 17 and the impact tool 43.

Moreover, in the manufacturing apparatus of the said embodiment, although the bead processing apparatus 16 was demonstrated as a structure which has both the impact tool 43 and the ultrasonic flaw detection probe (nondestructive inspection tool) 45 in addition to the temperature detection sensor 41, it was demonstrated. The present invention is not limited to this, and may be configured to include either the impact tool 43 or the ultrasonic flaw detection probe 45 in addition to the temperature detection sensor 41.
That is, the present invention may include a temperature detection sensor and a striking tool, and the striking tool may follow the torch with a first interval based on the temperature of the weld bead.
Moreover, this invention is good also as a structure provided with a temperature detection sensor and a nondestructive inspection tool, and making a nondestructive inspection tool track a torch with the 2nd space | interval based on the temperature of a welding bead.

As described above, the following items are disclosed in this specification.
(1) A method for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it.
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
A peening process in which a striking tool is made to follow the torch with a first interval based on the temperature of the welding bead, and the welding bead is hit;
The manufacturing method of the layered object to perform.
According to this method of manufacturing a layered object, the temperature of the weld bead formed by the torch is monitored, and the striking tool is made to follow the torch with a first interval based on the temperature of the weld bead. By hitting the weld bead, the crystal grains of the weld bead can be refined to make the solidified structure uniform, variation in strength can be suppressed, and the oxide film can be satisfactorily removed.
In addition, the top surface of the weld bead formed with the torch can be flattened by striking with a striking tool, so that the formation of the weld bead in the next layer can be stabilized and the formation accuracy can be improved. It becomes possible to perform the flaw detection in the bead with high accuracy.
Thereby, the quality of the layered object to be manufactured can be improved.

(2) In the peening process, the target height of hitting by the hitting tool is set to a position obtained by adding the expected height of the weld bead to be formed to the target height of the torch. Manufacturing method of a model.
According to this method of manufacturing a layered object, the upper surface of the weld bead can be evenly flattened, and the weld bead of the next layer can be formed more stably and with high accuracy.

(3) The manufacturing method of the layered object according to (1) or (2), wherein in the peening process, a cooling process is performed to cool a hitting position on the welding bead by the hitting tool.
According to this method of manufacturing a layered object, it is possible to shorten the time until the welding bead of the next layer is solidified by cooling the hitting position on the welding bead with the hitting tool. Therefore, since the temperature of the weld bead of the previous layer is high, the shape defect due to dripping or the like caused by the time until the weld bead of the next layer is solidified is suppressed. Thereby, the quality of the layered object can be improved and the modeling efficiency can be increased.

(4) The stacking according to any one of (1) to (3), in which a flaw detection inspection process is performed in which a flaw detection inspection is performed on the weld bead after the peening process by causing a nondestructive inspection tool to follow the impact tool. Manufacturing method of a model.
According to the manufacturing method of the layered object, the flaw detection of the welding bead is accurately inspected by the nondestructive inspection tool on the upper surface of the welding bead flattened by the striking tool by causing the striking tool to follow the nondestructive inspection tool. be able to.

(5) In the flaw detection inspection process, an ultrasonic current is superimposed on a current applied to the torch so that an ultrasonic wave is incident on the welding bead, and the ultrasonic wave is generated by the nondestructive inspection tool including an ultrasonic flaw detection probe. The manufacturing method of the layered object according to (4) to be detected.
According to this method for manufacturing a layered object, an ultrasonic current which is a nondestructive inspection tool can be used without superimposing an ultrasonic current on a welding bead by superimposing an ultrasonic current on a current applied to a torch. The flaw detection probe can easily perform flaw detection inspection of the weld bead.

(6) In the flaw detection processing, an ultrasonic wave is incident on the welding bead and the ultrasonic wave is detected by the nondestructive inspection tool including an ultrasonic flaw detection probe having an ultrasonic wave transmission / reception function. The manufacturing method of the laminate-molded article of description.
According to this method for manufacturing a layered object, it is possible to easily perform a flaw detection inspection of a weld bead using the ultrasonic flaw detection probe without superimposing an ultrasonic current on a current applied to a torch.

(7) A manufacturing apparatus for a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material to form a layered object,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A striking tool provided to follow the torch at a first interval based on the temperature of the welding bead and striking the welding bead;
An apparatus for manufacturing a layered object comprising:
According to the manufacturing apparatus of this layered object, by hitting the welding bead by causing the striking tool to follow the torch with a first interval based on the temperature of the welding bead detected by the temperature detection sensor, By making the crystal grains of the weld bead fine, the solidified structure can be made uniform, variation in strength can be suppressed, and the oxide film can be removed satisfactorily.
In addition, the top surface of the weld bead formed with the torch can be flattened by striking with a striking tool, so that the formation of the weld bead in the next layer can be stabilized and the formation accuracy can be improved. It becomes possible to perform the flaw detection in the bead with high accuracy.
Thereby, a high-quality layered object can be manufactured.

(8) The manufacturing apparatus for a layered object according to (7), wherein the striking tool includes a cooling mechanism that cools a striking location on the welding bead.
According to this layered object manufacturing apparatus, it is possible to shorten the time until the weld bead of the next layer is solidified by cooling the hitting position on the weld bead with the hitting tool with the cooling mechanism. Therefore, since the temperature of the weld bead of the previous layer is high, the shape defect due to dripping or the like caused by the time until the weld bead of the next layer is solidified is suppressed. Thereby, the quality of the layered object can be improved and the modeling efficiency can be increased.

(9) The manufacturing apparatus for a layered object according to (7) or (8), wherein a nondestructive inspection tool for flaw detection inspection of the weld bead is provided so as to be able to follow the impact tool.
According to this layered object manufacturing apparatus, by making a non-destructive inspection tool follow an impact tool, the flaw detection of the weld bead is accurately inspected by the non-destructive inspection tool on the upper surface of the weld bead flattened by the impact tool. be able to.

(10) The apparatus for manufacturing a layered object according to (9), wherein the nondestructive inspection tool is provided so as to be able to follow the torch at a second interval or more.
According to this layered object manufacturing apparatus, the non-destructive inspection tool can be prevented from being damaged due to high temperature by causing the non-destructive inspection tool to follow the torch with a second interval or more.

(11) The nondestructive inspection tool includes an ultrasonic flaw detection probe that detects an ultrasonic wave incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch (9) or (10 The manufacturing apparatus for the layered object according to (1).
According to this layered object manufacturing apparatus, ultrasonic waves that are non-destructive inspection tools can be used without superimposing ultrasonic current on the welding bead by superimposing ultrasonic current on current applied to the torch. The flaw detection probe can easily perform flaw detection inspection of the weld bead.

(12) The additive manufacturing method according to (9) or (10), wherein the nondestructive inspection tool includes an ultrasonic flaw detection probe that has an ultrasonic transmission / reception function and detects the ultrasonic wave incident on the welding bead. Manufacturing equipment.
According to this layered object manufacturing apparatus, it is possible to easily perform a flaw detection inspection of a weld bead using the ultrasonic flaw detection probe without superimposing an ultrasonic current on a current applied to a torch.

(13) A method for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it,
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
Flaw detection inspection processing for flaw detection inspection of the weld bead by following a non-destructive inspection tool with respect to the torch at a second interval based on the temperature of the weld bead;
The manufacturing method of the layered object to perform.
According to this method of manufacturing a layered object, it is possible to accurately inspect the flaws of the weld bead while avoiding a failure due to a high temperature of the nondestructive inspection tool.

(14) In the flaw detection inspection process, ultrasonic waves are incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch, and the ultrasonic waves are generated by the nondestructive inspection tool including an ultrasonic flaw detection probe. The manufacturing method of the layered object according to (13) to be detected.
According to this method for manufacturing a layered object, an ultrasonic current which is a nondestructive inspection tool can be used without superimposing an ultrasonic current on a welding bead by superimposing an ultrasonic current on a current applied to a torch. The flaw detection probe can easily perform flaw detection inspection of the weld bead.

(15) In the flaw detection processing, an ultrasonic wave is incident on the welding bead and the ultrasonic wave is detected by the nondestructive inspection tool including an ultrasonic flaw detection probe having an ultrasonic wave transmission / reception function. The manufacturing method of the laminate-molded article of description.
According to this method for manufacturing a layered object, it is possible to easily perform a flaw detection inspection of a weld bead using the ultrasonic flaw detection probe without superimposing an ultrasonic current on a current applied to a torch.

(16) An apparatus for manufacturing a layered object that forms a layered object by forming and laminating a weld bead obtained by melting and solidifying a filler material,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A non-destructive inspection tool which is provided so as to be able to follow the torch with a second interval based on the temperature of the weld bead, and which performs a flaw detection inspection on the weld bead;
An apparatus for manufacturing a layered object comprising:
According to this method of manufacturing a layered object, it is possible to accurately inspect the flaws of the weld bead while avoiding a failure due to a high temperature of the nondestructive inspection tool.

(17) The nondestructive inspection tool includes an ultrasonic flaw detection probe that detects an ultrasonic wave incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch. Manufacturing equipment for layered objects.
According to this layered object manufacturing apparatus, ultrasonic waves that are non-destructive inspection tools can be used without superimposing ultrasonic current on the welding bead by superimposing ultrasonic current on current applied to the torch. The flaw detection probe can easily perform flaw detection inspection of the weld bead.

(18) The non-destructive inspection tool includes an ultrasonic flaw detection probe that has an ultrasonic transmission / reception function and detects the ultrasonic wave incident on the welding bead. .
According to this layered object manufacturing apparatus, it is possible to easily perform a flaw detection inspection of a weld bead using the ultrasonic flaw detection probe without superimposing an ultrasonic current on a current applied to a torch.

17 Torch 25 Welding Bead 41 Temperature Detection Sensor 43 Blow Tool 45 Ultrasonic Probe (Non Destructive Inspection Tool)
51 Cooling mechanism 100 Manufacturing system (manufacturing equipment)
B striking point L1 1st space | interval L2 2nd space | interval M filler material W layered object

Claims (18)

It is a manufacturing method of a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it,
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
A peening process in which a striking tool is made to follow the torch with a first interval based on the temperature of the welding bead, and the welding bead is hit;
The manufacturing method of the layered object to perform.   In the peening process, the target height of hitting by the hitting tool is set to a position obtained by adding the expected height of the weld bead to be formed to the target height of the torch. Production method.   3. The method for manufacturing a layered object according to claim 1, wherein in the peening process, a cooling process for cooling a hitting position on the welding bead by the hitting tool is performed.   The layered object according to any one of claims 1 to 3, wherein a flaw detection inspection process is performed in which a flaw detection inspection is performed on the weld bead after the peening process by causing a nondestructive inspection tool to follow the impact tool. Production method.   In the flaw detection processing, ultrasonic waves are incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch, and the ultrasonic waves are detected by the nondestructive inspection tool including an ultrasonic flaw detection probe. Item 5. A method for producing a layered object according to Item 4.   The lamination according to claim 4, wherein in the flaw detection processing, ultrasonic waves are incident on the welding bead and the ultrasonic waves are detected by the nondestructive inspection tool including an ultrasonic flaw detection probe having an ultrasonic wave transmitting / receiving function. Manufacturing method of a model. An apparatus for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A striking tool provided to follow the torch at a first interval based on the temperature of the welding bead and striking the welding bead;
An apparatus for manufacturing a layered object comprising:   The said striking tool is an apparatus for manufacturing a layered object according to claim 7, comprising a cooling mechanism that cools a striking location on the welding bead.   The manufacturing apparatus for a layered object according to claim 7 or 8, wherein a nondestructive inspection tool for flaw-inspecting the weld bead is provided so as to be able to follow the impact tool.   The manufacturing apparatus for a layered object according to claim 9, wherein the nondestructive inspection tool is provided so as to be able to follow the torch at a second interval or more.   The said nondestructive inspection tool consists of an ultrasonic flaw detection probe which detects the ultrasonic wave which injected into the said welding bead by superimposing an ultrasonic current on the electric current applied to the said torch. The manufacturing apparatus of the layered object.   The said nondestructive inspection tool has an ultrasonic transmission / reception function, and consists of an ultrasonic flaw detection probe which detects the said ultrasonic wave which injected into the said welding bead, Manufacture of the laminate-molded article of Claim 9 or 10 apparatus. It is a manufacturing method of a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material with a torch and laminating it,
A temperature monitoring process for monitoring the temperature of the weld bead formed by the torch;
Flaw detection inspection processing for flaw detection inspection of the weld bead by following a non-destructive inspection tool with respect to the torch at a second interval based on the temperature of the weld bead;
The manufacturing method of the layered object to perform.   In the flaw detection processing, ultrasonic waves are incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch, and the ultrasonic waves are detected by the nondestructive inspection tool including an ultrasonic flaw detection probe. Item 14. A method for manufacturing a layered object according to Item 13.   The lamination according to claim 13, wherein in the flaw detection processing, ultrasonic waves are incident on the welding bead and the ultrasonic waves are detected by the nondestructive inspection tool including an ultrasonic flaw detection probe having an ultrasonic wave transmitting / receiving function. Manufacturing method of a model. An apparatus for manufacturing a layered object that forms a layered object by forming a weld bead obtained by melting and solidifying a filler material,
A torch for forming the weld bead;
A temperature detection sensor for detecting the temperature of the weld bead formed by the torch;
A non-destructive inspection tool which is provided so as to be able to follow the torch with a second interval based on the temperature of the weld bead, and which performs a flaw detection inspection on the weld bead;
An apparatus for manufacturing a layered object comprising:   The layered object according to claim 16, wherein the nondestructive inspection tool includes an ultrasonic flaw detection probe that detects an ultrasonic wave incident on the welding bead by superimposing an ultrasonic current on a current applied to the torch. Manufacturing equipment.   The layered object manufacturing apparatus according to claim 16, wherein the nondestructive inspection tool includes an ultrasonic flaw detection probe that has an ultrasonic wave transmission / reception function and detects the ultrasonic wave incident on the welding bead.

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