JP7160768B2 - Laminate-molded article setting method, laminate-molded article manufacturing method, and manufacturing apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting the excess thickness of a laminate-molded article, a method for manufacturing a laminate-molded article, and a manufacturing apparatus.

In recent years, there has been an increasing need for modeling using 3D printers as a means of production, and research and development are proceeding toward the practical use of modeling using metal materials. A 3D printer that models metal materials uses a heat source such as a laser, an electron beam, or an arc to melt metal powder or metal wire, and laminates the molten metal to produce a layered product.

As a metal 3D printer that forms a modeled object on a base plate by arc welding, a rigid plate in which the modeling table and the base are separated by spacers is provided detachably from the modeling table and the base. There is known a method in which a rigid plate is submerged in a cooling medium when molding an object, and secondary processing is performed together with the rigid plate after molding (see Patent Document 1).

In addition, we receive conditions related to the material property values, molding conditions, and size of the object to be molded by additive manufacturing, and based on these conditions and the constraint conditions that quantify the restraint state around the molten pool generated during molding. There is known a technique of calculating the inherent strain from the linear expression of the inherent strain derived by the method (see Patent Document 2).

JP 2017-144446 A JP 2018-184623 A

By the way, in layered manufacturing, in which a modeled object is formed by laminating welding beads on a base material, residual stress is generated inside the modeled object due to heat shrinkage, etc., because the material is melted and solidified. There is If the base material is removed by cutting in this state, the residual stress is released, and deformation occurs in the modeled object, which may cause an error with respect to the target shape. Therefore, in order to suppress the error with respect to the target shape, it is necessary to set a large excess thickness and then perform cutting such as rough machining and finishing. However, if the excess thickness is increased in consideration of the release strain, the manufacturing cost and manufacturing time will increase. Furthermore, since it is necessary to leave a large amount of cutting allowance in the rough machining, the machining time for the finish machining is lengthened.

With the technique of patent document 1 that corrects the deformation of the base plate and the technique of patent document 2 that calculates the inherent strain of the modeled object, it is difficult to suppress errors in the target shape of the object after cutting and removing the base material. is.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for setting the excess thickness of a laminate-molded article, a method for manufacturing a laminate-molded article, and a manufacturing apparatus capable of reducing the manufacturing cost and manufacturing time by increasing the accuracy of modeling and machining. and

The present invention consists of the following configurations.
(1) Laminate-molding a laminate-molded article on a base plate with a weld bead formed by melting and solidifying a filler material, and processing the laminate-molded article to form a target-shaped structure. A method for setting the excess thickness of a modeled object,
A deformation prediction step of predicting a deformation amount due to a release strain of the laminate-molded article generated when the laminate-molded article is separated from the base plate;
A deformation correction step of obtaining a correction profile obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain;
an excess thickness setting step of adjusting a laminate profile indicating an outer edge shape of the laminate-molded article so that an excess thickness amount from the correction profile to the outer edge of the laminate-molded article falls within a predetermined reference range;
Extra meat amount setting method including
(2) The layered product designed by the excess thickness setting method according to the above (1) is layered on the base plate by the welding bead, the layered product is separated from the base plate, and the target A method for manufacturing a modeled object to be processed into the structure having the shape.
(3) Manufacture of a laminate-molded product in which a laminate-molded product is laminate-molded on a base plate using a welding bead formed by melting and solidifying a filler material, and the laminate-molded product is processed to form a structure of a target shape. a device,
a displacement amount calculation unit that predicts the amount of deformation due to the release strain of the laminate-molded article that occurs when the laminate-molded article is separated from the base plate;
A correction profile is obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain, and from the correction profile, the laminate-molded article an excess thickness setting unit that adjusts the laminate profile that indicates the outer edge shape of the laminate-molded article so that the excess thickness up to the outer edge falls within a predetermined reference range;
A manufacturing apparatus for a laminate-molded product.

According to the present invention, the accuracy of modeling and machining can be improved, and the manufacturing cost and manufacturing time can be suppressed.

It is a schematic block diagram of the manufacturing apparatus of the laminate-molded article which concerns on this invention. It is a schematic sectional drawing along the up-down direction of a laminate-molded article. It is a schematic sectional drawing along the up-down direction explaining the procedure of basic lamination-molding of a laminate-molded article. It is a schematic sectional drawing along the up-down direction explaining the procedure of basic lamination-molding of a laminate-molded article. It is a schematic sectional drawing along the up-down direction explaining the procedure of basic lamination-molding of a laminate-molded article. It is a schematic sectional drawing along the up-down direction of the laminate-molded article explaining deformation|transformation of the laminate-molded article at the time of removing a base plate. It is a flow chart which shows a setting procedure of excess meat amount. It is a schematic diagram of the laminate-molded article explaining the setting procedure of the excess thickness amount. It is a schematic diagram of the laminate-molded article explaining the setting procedure of the excess thickness amount. It is a schematic diagram of the laminate-molded article explaining the setting procedure of the excess thickness amount.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<Laminate-molded product manufacturing equipment>
FIG. 1 is a schematic configuration diagram of a laminate-molded article manufacturing apparatus according to the present invention.
A manufacturing apparatus 100 for a laminate-molded product having this configuration includes a modeling unit 11 , a controller 13 that performs integrated control of the modeling unit 11 , and a power supply device 15 .

The modeling unit 11 includes a welding robot 19 having a torch 17 on its tip axis, and a filler material supply unit 21 that supplies a filler material (welding wire) M to the torch 17 .

The welding robot 19 is a multi-joint robot, and the torch 17 attached to the tip shaft of the robot arm is supported so that the filler material M can be continuously supplied. The position and posture of the torch 17 can be arbitrarily set three-dimensionally within the range of degrees of freedom of the robot arm.

The torch 17 holds the filler material M and generates an arc from the tip of the filler material M in a shield gas atmosphere. The torch 17 has a shield nozzle (not shown), and a shield gas is supplied from the shield nozzle. The arc welding method may be a consumable electrode type such as coated arc welding or carbon dioxide gas arc welding, or a non-consumable electrode type such as TIG welding or plasma arc welding. be.

For example, in the case of the consumable electrode type, a contact tip is arranged inside the shield nozzle, and the contact tip holds the filler material M to which the melting current is supplied. The torch 17 holds the filler material M and generates an arc from the tip of the filler material M in a shield gas atmosphere. The melt material M is fed from the melt material supply unit 21 to the torch 17 by a delivery mechanism (not shown) attached to a robot arm or the like. When the continuously fed filler material M is melted and solidified while the torch 17 is moving, a linear welding bead B, which is a melted and solidified body of the filler material M, is formed on the base plate 23 .

The filler material M is fed from the filler material supply unit 21 to the torch 17 by a feeding mechanism (not shown) attached to a robot arm or the like of the welding robot 19 . Then, the torch 17 moves along a desired welding line as the robot arm is driven by a command from the controller 13 . The continuously fed filler material M is melted and solidified in a shield gas atmosphere by an arc generated at the tip of the torch 17 . As a result, a weld bead B, which is a molten solidified body of the filler material M, is formed. As described above, the modeling unit 11 is a layered modeling apparatus that layers the molten metal of the filler material M, and models the layered product W by layering the welding beads B in multiple layers on the base plate 23 .

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, a heating method using an electron beam or a laser, or the like may be employed. When an arc is used, the welding bead B can be easily formed regardless of the material and structure while ensuring the shielding properties. When heating with an electron beam or laser, the amount of heating can be more finely controlled, the state of the welding bead B can be maintained more appropriately, and the quality of the laminate-molded article W can be further improved.

The controller 13 includes a lamination plan creation unit 31, a deformation amount calculation unit 33, an excess thickness setting unit 34, a program generation unit 35, a storage unit 37, an input unit 39, a display unit 40, and these units. and a control unit 41 to be connected. Three-dimensional shape data (CAD data, etc.) representing the shape of the laminate-molded article W to be manufactured and various instruction information are input from the input unit 39 to the control unit 41 . The display unit 40 displays various images based on image information transmitted from the control unit 41 .

The laminate-molded article manufacturing apparatus 100 of this configuration generates a shape model for forming a bead using the input three-dimensional shape data, and creates a lamination plan such as the movement trajectory of the torch 17 and welding conditions. The control unit 41 creates an operation program according to the stacking plan, drives each unit according to this operation program, and laminates the laminate-molded article W having a desired shape.

The lamination planning section 31 decomposes the shape model of the input three-dimensional shape data into a plurality of layers corresponding to the height of the welding bead B. As shown in FIG. Then, for each layer of the disassembled shape model, the trajectory of the torch 17 for forming the welding bead B and the heating conditions for forming the welding bead B (welding conditions for obtaining the bead width, the bead lamination height, etc.) are determined. Create a layup plan that defines In addition, the lamination plan creation unit 31 includes a target profile Pm representing the outer edge of the target shape of the structure W1 to be produced by machining the laminate-molded object W that is laminate-molded by overlapping the welding beads B, and A laminate profile Ps representing the outer shape of the laminate-molded article W is created.

The deformation amount calculation unit 33 analytically obtains the amount of deformation caused by the release of the residual stress of the laminate-molded article W when the base plate 23 is removed from the laminate-molded article W manufactured according to the lamination plan.

The surplus thickness amount setting unit 34 sets the surplus thickness amount as a cutting allowance from the target profile Pm, which is the profile of the structure W1, to the outer edge of the laminate-molded article W. Further, the excess thickness setting unit 34 corrects the excess thickness according to the deformation amount predicted by the deformation amount calculation unit 33 .

The program generation unit 35 drives each unit of the modeling unit 11 to set the modeling procedure of the laminate-molded article W, and creates an operation program for causing the computer to execute the procedure. The created operation program is stored in the storage unit 37 .

In addition to storing an operation program, the storage unit 37 also stores specifications of various drive units of the molding unit 11, information on the material of the filler material M, and the like. The stored information is appropriately referred to when executing the operation program. The storage unit 37 is composed of a storage medium such as a memory or a hard disk, and is capable of inputting/outputting various types of information.

The controller 13 including the control unit 41 is a computer device including a CPU, memory, I/O interface, and the like. The controller 13 has a function of reading data and programs stored in the storage unit 37 , processing the data and executing an operation program, and a function of driving and controlling each part of the modeling unit 11 . The control unit 41 creates and executes operation programs based on instructions from the input unit 39 through operations, communications, and the like.

When the control unit 41 executes the operation program, each unit such as the welding robot 19 and the power supply device 15 is driven according to a predetermined programmed procedure. The welding robot 19 moves the torch 17 along the programmed trajectory according to the command from the controller 13, melts the filler material M with an arc at a predetermined timing, and forms a welding bead B at a desired position. Form.

The operation program here is an instruction code for causing the molding unit 11 to perform the formation procedure of the welding bead B designed by a predetermined calculation from the input three-dimensional shape data of the laminate-molded object W. The control unit 41 causes the modeling unit 11 to manufacture the laminate-molded article W by executing the operation program stored in the storage unit 37 . That is, the control unit 41 reads a desired operation program from the storage unit 37 , drives the welding robot 19 to move the torch 17 according to the operation program, and causes the tip of the torch 17 to generate an arc. As a result, the weld bead B is repeatedly formed on the base plate 23, and the laminate-molded article W is formed.

The lamination plan creation unit 31, the deformation amount calculation unit 33, the excess thickness setting unit 34, the program generation unit 35, and other calculation units are provided in the controller 13, but are not limited to this. Although not shown, for example, an external computer such as a server or a terminal arranged separately from the laminate-molded article manufacturing apparatus 100 via a communication means such as a network or a storage medium has the above-described operation unit. may be provided. A desired operation program can be created without using the laminate-molded article manufacturing apparatus 100 by providing the above-described operation unit in the external computer, and the program creation work does not become complicated. Further, by transferring the created operation program to the storage unit 37 of the controller 13 , the modeling unit 11 can be operated in the same manner as when the operation program is created by the controller 13 .

<Basic additive manufacturing procedure>
Next, a brief description will be given of the procedure of lamination-molding for the lamination-molded article W illustrated as a simple model.

FIG. 2 is a schematic cross-sectional view along the vertical direction of the laminate-molded article W. As shown in FIG. 3A to 3C are schematic cross-sectional views along the vertical direction for explaining the basic lamination-molding procedure of the laminate-molded article W. FIG. FIG. 4 is a schematic cross-sectional view along the vertical direction of the laminate-molded article W for explaining deformation of the laminate-molded article W when the base plate is removed.

As shown in FIG. 2, the laminate-molded article W according to one example is formed in a cylindrical shape. This layered product W is formed on the base plate 23 . The base plate 23 is made of a metal plate such as a steel plate, and is basically larger than the bottom surface (lowermost layer surface) of the laminate-molded article W. In addition, the base plate 23 is not limited to a plate shape, and may be a block-shaped base, a bar-shaped base, or the like. Although FIG. 2 shows an example in which one welding bead B is used to form one bead layer BL, a plurality of welding beads B may be used to form the bead layer BL.

As shown in FIG. 3A, in order to form the laminate-molded article W, the welding robot 19 moves the torch 17 along the trajectory indicated by the welding robot 19 according to the operation program on the pre-installed base plate 23 . An arc is generated along with the movement of the torch 17, and a welding bead B is formed along the trajectory along which the torch 17 moves. The welding bead B is formed by melting and solidifying the filler material M, and the following bead layer BL is repeatedly laminated on the formed bead layer BL.

As shown in FIG. 3B , after the laminate-molded article W is formed on the base plate 23, the base plate 23 is cut with a cutting machine such as a wire saw or a diamond cutter to remove the base plate 23 from the laminate-molded article W. Separate W. After that, as shown in FIG. 3C, for example, the excess thickness portion set by the excess thickness setting unit 34 is cut from the laminate-molded article W to process the structure W1. Note that the base plate 23 may be removed after cutting the excess thickness of the laminate-molded article W. As shown in FIG.

By the way, in the layered manufacturing method in which the weld bead B is layered on the base plate 23 to form the layered article W, since the material is melted and solidified to form the layered article W, residual stress is generated inside the layered article W due to thermal contraction or the like. have occurred. Then, when the base plate 23 is cut and removed from the laminate-molded article W, the laminate-molded article W may be deformed due to the release of the residual stress. For example, as shown in FIG. 4, when the base plate 23 is removed from the laminate-molded article W that has been formed into a cylindrical shape, the end portion that was joined to the base plate 23 expands in diameter due to the release of the residual stress, resulting in the desired shape. An error may occur with respect to the shape model MA (indicated by the dotted line in FIG. 4). For this reason, it may be difficult to subsequently cut the excess thickness to form the structure W1.

Here, welding deformation and residual stress of a laminate-molded product are generally calculated using the finite element method (finite element method).
Analysis is performed by a computer simulation using a thermo-elastic-plastic analysis method using FEM) or an elastic analysis.

In the thermo-elastic-plastic analysis method, phenomena are calculated by considering various nonlinear elements for every minute time step, so highly accurate analysis can be performed. On the other hand, in elastic analysis, only linear elements are taken into account, so analysis can be completed in a short time. When the laminate-molded article W is modeled by lamination-molding in which the welding beads B are laminated, all parts of the laminate-molded article W undergo a metal melting/solidification process. When the metal is melted and solidified, inherent strain (plastic strain, thermal strain) is generated in the laminate-molded article W. Residual stress resulting from this inherent strain is generated inside the laminate-molded article W. As shown in FIG. The deformation amount calculation unit 33 analytically obtains the shape change due to such layered manufacturing.

The deformation amount calculation unit 33 may be configured to include, for example, a partial model thermo-elastic-plastic analysis unit and a whole model elastic analysis unit. The partial model thermo-elastic-plastic analysis part performs thermo-elastic-plastic analysis using a partial model of the model based on the input analysis conditions (laminate manufacturing conditions, material property conditions) and inherent strain (plastic strain, Thermal strain) is calculated. The overall model elastic analysis unit performs elastic analysis on the overall model of the model based on the calculated inherent strain to derive residual stress and the like. The conditions used for the analysis include additive manufacturing conditions with parameters such as heat source output, heat source type, beam profile, scanning speed, scanning sequence, line offset or preheating temperature, etc., and Young's modulus, yield strength, and linear expansion of materials. There are mechanical physical property values such as modulus and work hardening index, and material physical property conditions such as thermophysical property values such as thermal conductivity and specific heat.

Such analysis processing is executed by a computer according to a program. That is, the deformation amount calculation unit 33 is a computer including a processor such as a CPU, a storage device such as a ROM (Read Only Memory), a RAM (Random Access Memory), a HDD (Hard Disk Drive), and an SSD (Solid State Drive). can be configured as In this case, the function of each unit can be realized by the processor executing a predetermined program stored in the storage unit 37 made up of a storage device.

<Excess thickness setting for laminate-molded objects>
In the present embodiment, the deformation amount calculation unit 33 predicts the deformation amount of the laminate-molded article W after the base plate 23 is removed, and based on the prediction, the target profile Pm is corrected with high accuracy to obtain an appropriate excess thickness amount. set. Hereinafter, the setting of the amount of surplus meat according to this embodiment will be described in detail.

FIG. 5 is a flow chart showing the procedure for setting the excess thickness of the laminate-molded article. 6A to 6C are schematic diagrams of the laminate-molded article W for explaining the procedure for setting the excess thickness.

First, the controller 13 acquires three-dimensional shape (3D) data, which is CAD data of a layered product to be modeled, from the input unit 39 (S1). The three-dimensional shape data includes various dimensional information such as the coordinates of the outer edge of the laminate-molded article W, as well as information such as the type of material and final finish that are referred to as necessary.

The stacking plan creation unit 31 of the controller 13 creates a stacking plan based on the acquired three-dimensional shape data (S2). Specifically, as shown in FIG. 6A , a laminate profile Ps representing the external shape of the laminate-molded article W that is laminate-molded by overlapping the welding beads B, and the target of the structure W1 that is produced by machining the laminate-molded article W Create a target profile Pm representing the outer edge of the shape.

Further, the excess thickness setting unit 34 calculates the excess thickness to be provided around the structure W1 before machining based on the created laminate profile Ps and target profile Pm (S3
). Here, as described above, by removing the base plate 23, the laminate-molded article W made of the welding bead B is deformed by releasing the residual stress. As a result, the target profile Pm created by the lamination planning section 31 is deformed by the release strain (see the two-dot chain line in FIG. 6A).

Therefore, after creating the lamination plan, the deformation amount calculator 33 predicts the deformation of the target profile Pm after the removal of the base plate 23 (S4), and calculates the displacement δA, which is the deformation amount of the target profile Pm due to this deformation ( S5). Then, as shown in FIG. 6B, the deformation amount calculation unit 33 obtains a corrected profile Pmd by deforming the target profile Pm (see the dotted line in FIG. 6B) according to the displacement δA in the direction opposite to the deformation direction due to the release strain. . Next, the excess thickness setting unit 34 compares the calculated excess thickness with the displacement δA, which is the amount of deformation predicted by the deformation calculation unit 33 .

Then, it is determined whether or not the excess thickness is greater than the displacement .delta.A and equal to or less than the allowable displacement .delta.A+.alpha. obtained by adding the preset allowable amount .alpha. Here, the allowable amount α is a value set in advance in order to give an upper limit to the amount of surplus material and minimize excessive machining of the surplus material.

If the calculated excess thickness amount is larger than the displacement δA and does not satisfy the condition of the allowable displacement δA+α or less, the excess thickness setting unit 34 corrects the excess thickness to satisfy this condition (S3). When the surplus thickness before correction satisfies the condition of being larger than the displacement δA and equal to or less than the allowable displacement δA+α, the laminate profile Ps including the surplus thickness is maintained.

After obtaining the corrected profile Pmd in this manner, the lamination plan creation unit 31 creates a laminated body profile Ps including the area obtained by adding the excess thickness to the corrected profile Pmd as the final lamination plan, as shown in FIG. 6C. Create (S7).

As described above, according to the method for setting the excess thickness of the laminate-molded article of this configuration, the target profile Pm representing the outer edge of the target shape is deformed by the release strain that occurs when the laminate-molded article W is separated from the base plate 23. By correcting according to the displacement .delta.A, which is the amount, the excess thickness can be appropriately set. As a result, highly accurate modeling and machining can be performed in consideration of the release strain after separation from the base plate 23 after modeling, and machining efficiency can be improved by reducing the time required for machining.

Therefore, according to the method and apparatus for manufacturing a laminate-molded article having this configuration, the laminate-molded article W having an appropriately set excess thickness is formed by the welding bead B, and the laminate-molded article W is separated from the base plate 23. By processing, the structure W1 having the target shape can be manufactured efficiently and with high accuracy.

As described above, the present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications and applications by combining each configuration of the embodiments with each other, based on the description of the specification and well-known techniques. It is also contemplated by the present invention that it falls within the scope of protection sought.

For example, in the above example, the laminate-molded article W has a simple cylindrical shape, but the shape of the laminate-molded article W is not limited to this. As the laminate-molded article W has a more complicated shape, the effects of the above-described lamination plan and manufacturing method become more pronounced, and thus can be preferably applied.

Further, the laminate profile Ps, the target profile Pm, or the correction profile Pmd may be superimposed and displayed on the display unit 40 . In this way, the operator determines whether or not the amount of surplus material needs to be corrected based on each profile displayed on the display unit 40, and as a result, it is determined that the amount of surplus material needs to be corrected. When determined, the input unit 39 can be operated to issue a change instruction to correct the laminate profile Ps.

This makes it possible to efficiently create a stacking plan in which the release strain due to separation from the base plate 23 is reflected. Further, the changed state can be easily confirmed from the display of the laminate profile Ps of the laminate-molded article W after the change displayed on the display unit 40 .

In the above example, the amount of surplus material is corrected based on the deformation caused by the strain released when the base plate 23 is removed. The amount of surplus meat based on the above may be corrected together.

As described above, this specification discloses the following matters.
(1) Laminate-molding a laminate-molded article on a base plate with a weld bead formed by melting and solidifying a filler material, and processing the laminate-molded article to form a target-shaped structure. A method for setting the excess thickness of a modeled object,
A deformation prediction step of predicting a deformation amount due to a release strain of the laminate-molded article generated when the laminate-molded article is separated from the base plate;
A deformation correction step of obtaining a correction profile obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain;
an excess thickness setting step of adjusting a laminate profile indicating an outer edge shape of the laminate-molded article so that an excess thickness amount from the correction profile to the outer edge of the laminate-molded article falls within a predetermined reference range;
Extra meat amount setting method including
According to this excess thickness setting method, the target profile representing the outer edge of the target shape is corrected according to the displacement, which is the amount of deformation due to the release strain that occurs when the layered product is separated from the base plate. can be set appropriately. As a result, high-precision modeling and processing can be performed in consideration of the release strain after separation from the base plate after modeling, and processing efficiency can be improved by reducing the time required for processing.

(2) displaying the laminate profile and the correction profile in a superimposed manner on a display;
an input step of receiving an instruction to change the modeling area of the laminate-molded article;
a step of changing the outer edge shape of the laminate-molded article according to the input change instruction, and displaying the changed laminate profile of the laminate-molded article on the display unit;
The surplus meat amount setting method according to (1), further comprising:
According to this excess thickness setting method, it is possible to confirm the correction profile displayed superimposed on the laminate profile displayed on the display unit, and to input an instruction to change the modeling area of the laminate-molded article. As a result, it is possible to efficiently create a lamination plan that reflects the release strain due to separation from the base plate. Further, the changed state can be easily confirmed from the display of the changed laminate profile of the laminate-molded article displayed on the display unit.

(3) The excess thickness setting method according to (1) or (2), wherein the welding bead is formed by melting the filler material using an arc as a heat source.
According to this surplus thickness setting method, when forming a layered product by melting the filler metal using an arc as a heat source and laminating the welding beads, the layered product is manufactured by considering the influence of the heat of the welding bead. It can be molded with high precision.

(4) The layered product designed by the excess thickness setting method according to any one of (1) to (3) is layered on the base plate by the welding bead, and the layered product is manufactured. A method of manufacturing a modeled object, in which the modeled object is separated from the base plate and processed into the structure having the target shape.
According to this method of manufacturing a modeled product, a layered product with an appropriately set excess thickness is modeled with a welding bead, and the layered product is separated from the base plate and processed, thereby forming a structure having a target shape as follows: It can be manufactured efficiently and with high precision.

(5) Manufacture of a laminate-molded product in which a laminate-molded product is laminate-molded on a base plate using a welding bead formed by melting and solidifying a filler material, and the laminate-molded product is processed to form a structure of a target shape. a device,
a displacement amount calculation unit that predicts the amount of deformation due to the release strain of the laminate-molded article that occurs when the laminate-molded article is separated from the base plate;
A correction profile is obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain, and from the correction profile, the laminate-molded article an excess thickness setting unit that adjusts the laminate profile that indicates the outer edge shape of the laminate-molded article so that the excess thickness up to the outer edge falls within a predetermined reference range;
A manufacturing apparatus for a laminate-molded product.
According to this laminate-molded article manufacturing apparatus, a laminate having an appropriately set excess thickness is modeled with a welding bead, and the laminate is separated from a base plate and processed to obtain a structure having a target shape. It can be manufactured efficiently and with high precision.

23 Base plate 33 Deformation amount calculation unit 34 Excess thickness setting unit 40 Display unit 100 Manufacturing device B Welding bead M Filler material Pm Target profile Pmd Correction profile Ps Laminate profile W Laminate-molded article W1 Structure δA Displacement

Claims (5)

The laminate-molded article is laminate-molded on the base plate by a welding bead formed by melting and solidifying a filler material, and the laminate-molded article is processed to form a target-shaped structure. A method for setting the amount of surplus meat,
A deformation prediction step of predicting a deformation amount due to a release strain of the laminate-molded article generated when the laminate-molded article is separated from the base plate;
A deformation correction step of obtaining a correction profile obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain;
an excess thickness setting step of adjusting a laminate profile indicating an outer edge shape of the laminate-molded article so that an excess thickness amount from the correction profile to the outer edge of the laminate-molded article falls within a predetermined reference range;
Extra meat amount setting method including a step of superimposing and displaying the laminate profile and the correction profile on a display unit;
an input step of receiving an instruction to change the modeling area of the laminate-molded article;
a step of changing the outer edge shape of the laminate-molded article according to the input change instruction, and displaying the changed laminate profile of the laminate-molded article on the display unit;
The surplus meat amount setting method according to claim 1, further comprising: 3. The method of setting excess thickness according to claim 1, wherein said welding bead is formed by melting said filler material using an arc as a heat source. The laminate-molded product designed by the method for setting excess thickness according to any one of claims 1 to 3 is laminate-molded on the base plate by the welding bead, and the laminate-molded product is separated from the base plate. , a method for manufacturing a model to be processed into the structure having the target shape. A laminate-molded article manufacturing apparatus for laminate-molding a laminate-molded article on a base plate using a welding bead formed by melting and solidifying a filler material, and processing the laminate-molded article to form a structure of a target shape. hand,
a displacement amount calculation unit that predicts the amount of deformation due to the release strain of the laminate-molded article that occurs when the laminate-molded article is separated from the base plate;
A correction profile is obtained by correcting the target profile representing the outer edge of the target shape of the structure according to the displacement, which is the amount of deformation, in a direction opposite to the deformation due to the release strain, and from the correction profile, the laminate-molded article an excess thickness setting unit that adjusts the laminate profile that indicates the outer edge shape of the laminate-molded article so that the excess thickness up to the outer edge falls within a predetermined reference range;
A manufacturing apparatus for a laminate-molded product.

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