JP2008015896A - Automatic design data creation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic design data creation method, capable of automatically designing a route in consideration for interference with an obstacle on a CAD system. <P>SOLUTION: The method comprises steps of assigning an attribute to a member which will inhibit the creation of the route 2 mutually connecting a start point 210 and an end point 220 between cylinders 1 on the CAD system; identifying the member which will inhibit as an obstacle 6 by recognizing the attribute; two-dimensionally recognizing an area of a combined shape of the sectional outer shape of the obstacle and the sectional outer shape of the route as an obstacle area 68; and forming the route 2 between the start point and the end point while bypassing the obstacle area. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic design data creation method for creating paths, fillets, and machining allowances on a CAD (Computer Aided design) system.

  In designing a cooling pipe path for a mold using CAD, a path for connecting the members is created. There are a plurality of paths connecting each member. For this reason, the designer has created several three-dimensional models of the route while considering interference with other routes, and selected the optimum one among them.

  However, experience and intuition greatly affect the creation of an optimal route in consideration of interference with other routes, and anyone cannot design piping of the same quality. In addition, since the route was designed while the route was created and the distance from the periphery of the route was confirmed, a great amount of man-hours was spent on designing and correcting the route.

  Further, in the middle of the route, a shape that avoids the intersection may be given to a portion that intersects with another route, or a coupling member such as a joint may be attached. Moreover, when the clearance gap between the some cylinders for cooling piping is narrow, the external shape of a some member may be integrated. Furthermore, a fillet may be formed in a joint portion with another member of the path or a thin plate for fixing the cylinder, or a machining allowance may be formed in a processing portion of each member. Conventionally, the detailed shape of the cooling structure portion of the mold has been individually created. For this reason, enormous man-hours and time are required to create a three-dimensional model of the cooling pipe.

  Therefore, conventionally, a technology for automatically designing a path and a detailed shape for a cooling pipe of a mold has been developed. For example, in Patent Document 1, a pipe start surface is set based on a three-dimensional model indicating a mold, a pipe direction cross section of a mold model orthogonal to the start surface is created for the start surface, and the start position is In accordance with the shape of the mold model starting from, a cooling path is created based on a predetermined rule.

  Patent Document 2 discloses that an interference region having a width obtained by adding a minimum margin dimension determined by a design rule to a pipe diameter around an obstacle is set, and a route search line overlapping the interference region is deleted. Yes.

  Patent Document 3 discloses expressing and expressing a fine fillet, a model that anticipates a gradient, and a model with processing allowances from a product model that does not take into account the fillet over details and the formability of subsequent processes. Has been. When creating a fillet or machining allowance, fillet or machining allowance shape data is generated for an element designated in the shape file based on a fillet or machining allowance creation command.

Patent Document 4 discloses that the temperature distribution of a mold is analyzed and input to optimize piping.
JP-A-8-22487 Japanese Patent Laid-Open No. 5-298399 JP 2003-30258 A Japanese Patent No. 3078178

  However, in Patent Document 1, it is necessary to set piping rules in advance. In Patent Document 2, it is necessary for a designer to specify a member or route to be moved in a state where automatic piping has been completed. In any case, it is impossible to automatically design the piping by avoiding interference with various obstacles on the CAD system. In patent document 4, it is a piping design technique which considered temperature distribution, and is not a technique for obstacle avoidance.

  In Patent Document 3, a fillet and a machining allowance are added to a product model designed in advance. For this reason, a fillet and a machining allowance cannot be given to an arbitrary shape model.

  The present invention has been made in view of the above circumstances, and a first problem is an automatic design data creation method capable of automatically designing a route in consideration of interference with an obstacle on a CAD system. Is to provide.

  A second problem is to provide an automatic design data creation method capable of automatically designing a detailed shape of a route on a CAD system.

  A third problem is to provide an automatic design data creation method capable of automatically designing detailed shapes of members other than paths on a CAD system.

  (1) In the invention that solves the first problem, automatic design data creation for creating a path connecting a start point and an end point with each member of a product composed of a plurality of members on a CAD system as a start point and an end point An attribute assigning step for assigning an attribute to a member that becomes an obstacle in creating a route, and an identification step for identifying the obstacle member as an obstacle by recognizing the attribute assigned to the obstacle member And a setting step for setting the outer shape of the cross section of the path to be created, and an area recognition process for recognizing an area having a shape obtained by combining the outer shape of the cross section of the obstacle and the outer shape of the cross section of the path as the obstacle area And a creation step of creating a route while bypassing the obstacle region between the start point and the end point.

  According to the present invention, when a path is created between a start point and an end point in a CAD system, an area having a shape obtained by adding the outline shape of the cross section of the path to the outline shape of the cross section of the obstacle is obtained at the time of creating the path. It is recognized as an obstacle area. For this reason, an obstacle can be recognized in advance before creating a route on CAD. Then, after recognizing the obstacle, it is possible to automatically create a route avoiding the obstacle area in the CAD.

  Conventionally, in 3D, a route is created and the designer measures the distance to the obstacle. The designer then corrects the route so that it does not interfere with the obstacle. It was. Since people were measuring and judging, there were design man-hours and human error, and it was not possible to efficiently create a route avoiding obstacles.

  On the other hand, in the present invention, the designer assigns the attribute of the obstacle, and only inputs the cross-sectional shape information of the route to the CAD system, and the CAD system automatically sets the obstacle between the start point and the end point. You can create a route avoiding things. Therefore, the number of steps for creating, measuring, and correcting the route can be reduced, and the route can be created efficiently and automatically.

  Here, the “obstacle” refers to a member that becomes an obstacle in creating a route between the start point and the end point. The “attribute” refers to a sign that can identify whether the object is an obstacle, for example, “name” assigned to each member. The “outer shape of the cross section of the obstacle” refers to the shape of the outer contour of the cross section formed when the obstacle is cut in a certain direction. The “outer shape of the cross section of the path” refers to the shape of the outer contour of the cross section formed when the path is cut in the radial direction.

  In the region recognition process, the cross section of the obstacle and the cross section of the path are preferably a two-dimensional model obtained by two-dimensionalizing the obstacle and the path from the same line-of-sight direction. As a result, the outer shape of the cross section of the obstacle and the outer shape of the cross section of the path are recognized on the same two dimensions. For this reason, in two dimensions, the outer shape of the cross section of the obstacle and the outer shape of the cross section of the path can be easily combined, and an obstacle region having a shape obtained by combining both can be easily recognized.

  For example, in the region recognition process, when the outer shape of the two-dimensional model of the obstacle is a circle, the same center point as the circle and the size of the outer shape of the two-dimensional model of the path are set to the diameter of the circle. A concentric circle whose diameter is the added value is recognized as an obstacle region. The “outer shape of the two-dimensional model of the obstacle” refers to the shape of the outer contour of the two-dimensional obstacle.

  For example, in the area recognition step, when the outer shape of the two-dimensional model of the obstacle is a non-circular shape other than a circle, the outer shape of the path is the same as the circle that includes the non-circular shape and the center point is the same. A concentric circle whose diameter is a value obtained by adding the size of is recognized as an obstacle region.

  In the creation step, a route is created between the start point and the end point, and when there is no intersection with the obstacle area on the route, the route is maintained as it is.

  On the other hand, in the creation process, when a route is created between the start point and the end point, and there is an intersection with the obstacle region on the route, for example, a point on the outline of the obstacle region is used as a detour point, and the start point Change the route so that it passes through the detour point between the destination and the end point.

  In this case, in the creation process, a route is created between the start point and the end point, and if there is an intersection with the obstacle region on the route, a point on the outline of the surplus region with clearance added to the obstacle region It is preferable to change the route so that a detour point is used and the detour point is routed between the start point and the end point. Since a point on the outline of the surplus area with clearance added to the obstacle area is used as a detour point, creating a route via this detour point forms a clearance for preventing interference between the obstacle region and the route. Is done.

  When there are a plurality of obstacle areas on the route, the detour point is preferably a point on the outline of the surplus area obtained by adding clearance to the obstacle area having a shorter distance from the starting point. As a result, a short path can be created.

  When only one obstacle exists between the start point and the end point, the route created from the start point to the end point is always the same as the route created from the end point to the start point. However, when there are a plurality of obstacles between the start point and the end point, the first route created from the start point to the end point is not necessarily the same as the second route created from the end point to the start point.

  In this case, for example, the creation step selects one of a step of creating a forward route from the start point to the end point, a step of creating a reverse route from the end point to the start point, and a forward route and a reverse route. It is preferable to have a process. In selecting one of the first route and the second route, it is preferable to display the index data. The index data includes the length of the route, the number of bending (folding), the number of joints, the number of route intersections, and the like.

  (2) When there are many members connected by the path, the paths for connecting the members also increase. When the number of routes increases, the routes may interfere with each other. In this case, it is necessary to make the shape of one route avoiding the other route so that one route does not interfere with the other route. When the interference between routes increases, a great amount of man-hours are spent on avoiding the route.

  Therefore, as an invention for solving the second problem, there is an automatic design data creation method for creating an intersection avoidance member at an intersection where paths connecting each member which is a component of a product intersect on a CAD system. A step of recognizing an intersection where the routes intersect, a step of arranging an intersection avoiding member having a shape capable of avoiding the intersection at the intersection, and a step of coupling the intersection avoiding member with the route There is an automatic design data creation method.

  With this configuration, it is determined whether or not the routes intersect each other, and in the case of intersecting, an intersection avoiding member having a shape that can avoid the intersection is disposed on one route. Thereafter, the crossing avoidance design can be efficiently performed by combining one of the paths and the crossing avoiding member.

  (3) When the route creation range is widened, there are cases where it is not possible to produce all of the products as one production unit from the viewpoint of production or assembly. In this case, on the CAD, the designer creates a path on one coordinate plane on which each member is arranged, and then divides this one coordinate plane into a plurality of production units. When a path is formed across the boundaries of a plurality of divided production units, a designer creates a coupling member such as a joint there. According to this method, it is necessary to correct the shape of the coupling member every time the path is changed, which requires a large number of design steps.

  Therefore, as an invention for solving the second problem, an automatic design data creation method for creating a coupling member in the middle of a path connecting each member which is a component of a product on a CAD system, wherein the member is arranged. A step of creating a dividing line that divides the product into production units on the coordinate plane, a step of creating a path connecting each member, a step of recognizing the intersection of the dividing line and the path, and a connecting member at the intersection There is an automatic design data creation method characterized by performing a step of arranging and a step of coupling a coupling member and a path.

  With this configuration, the designer creates a dividing line in advance on the coordinate plane on which each member is arranged, and arranges the coupling member at the intersection of the dividing line and the path. Thereafter, the CAD automatically couples the coupling member and the path. For this reason, a coupling member can be designed efficiently. Note that when the dividing line is created on the coordinate plane, the members may or may not already be arranged on the coordinate plane. If no member is arranged on the coordinate plane, the member is created on the coordinate plane after the dividing line is created.

  (4) In addition, a fillet (joint fillet) may be formed on another member in the middle of the path. Moreover, not only a path | route but a fillet may be created between various members and another member. In order to form this fillet on the CAD system, after a member such as a path is created, an intersection line between the member and another member is instructed. Create a fillet at the indicated intersection line. According to this method, the designer needs to indicate an intersection line for creating a fillet. In addition, every time a product member or route is redesigned, the designer needs to instruct an intersection line for creating a fillet. For this reason, a lot of man-hours may be required for the modeling of the fillet.

  Accordingly, as an invention for solving the third problem, an automatic design data creation method for joining a first member and a second member, which are components of a product, with a fillet on a CAD system, the first member An intersection information acquisition step of acquiring intersection information of the second member intersection line portion formed by intersecting the surface of the second member and the side surface of the second member, and an intersection line portion based on the intersection line information of the second member intersection line portion There is an automatic design data creation method characterized by having a creation step of creating a fillet.

  With this configuration, when each member is created on the CAD system, the intersection line between the first member and the second member is automatically recognized by the CAD system, and a fillet is formed at the intersection. For this reason, it is not necessary for the designer to individually indicate the intersection line forming the fillet. Therefore, a fillet can be created efficiently.

  Here, when the first member and the second member are solid solid data, and the surface of the first member has a concave portion, the intersection line information acquisition step adds to the intersection line information of the second member intersection part. Further, the intersection information of the concave intersection line formed by the intersection of the surface of the first member and the side surface of the concave part is obtained, and the creation process includes hollow surface data in the second member intersection line and the concave intersection line. A step of creating a fillet comprising: a step of solidifying fillet surface data to create a fillet comprising solid data, and a fillet that has changed solidly without overlapping the solid first member. The fillet that is identified as the second member fillet that joins between the surface of the first member and the side surface of the second member and does not change by overlapping with the solid first member is between the surface of the first member and the side surface of the recess. Recessed flange formed on And identifying as a cmdlet, it is preferable that a step of deleting the recess fillet.

  When the second member is joined to the first member having a concave portion on the surface by a fillet (joint fillet), the concave portion intersecting portion formed by the intersection of the first member and the concave portion is used for joining. There is no need to form a fillet, and it is desired to form a fillet for joining only at the second member intersection line formed by the intersection of the first member and the second member. According to the above configuration, when a fillet composed of hollow surface data is created at the second member intersection line and the recess intersection line and solidified, the fillet created at the second member intersection line changes solidly. On the other hand, since the fillet created at the intersection of the concave portions is already created in the first member made of solid data, the fillet does not change solidly even if the solidification process is performed, and the data does not change at all. Therefore, the CAD can identify the solid fillet that has changed solidly as a fillet that joins between the first member and the second member, and the fillet that has not changed solidly between the first member and the recess. It can be identified as a fillet formed between them. Thus, according to the said structure, the fillet which joins between the 1st member and the 2nd member, and the fillet formed between a 1st member and a recessed part can be identified automatically. For this reason, a fillet can be efficiently produced with respect to the 2nd member intersection line part.

  Solid data refers to solid, that is, solid three-dimensional CAD data (solid model). Surface data refers to three-dimensional CAD data of a solid (surface shape model) that is not filled with contents.

  A fillet is first created in advance at the intersection intersecting portion and the second member intersecting portion by surface data, and then solidified. In this case, since the fillet forming portion of the second member intersection line portion does not have the solid first member and the second member, the fillet forming portion changes solidly. On the other hand, since the solid first member already exists in the fillet forming portion of the concave intersection line portion, the fillet forming portion does not change even if the fillet is solidified. In this way, when the fillet forming portion is newly changed to be solid, it is recognized as a convex second member fillet formed at the second member intersection line portion. On the other hand, when a fillet formation part does not change, it recognizes as the recessed part fillet formed in the recessed part intersection line part. And a 2nd member fillet is left and a recessed part fillet is deleted. Thereby, a fillet can be automatically created only at the second member intersection line portion.

  The CAD system used here preferably has a function of creating various design shapes with solid solid data, creating with hollow surface data, and converting between solid data and surface data. .

  (5) When the gaps between the plurality of members are narrow, the fluidity of the molding material during molding may be affected. In this case, there is a method in which members are created on CAD, the distance of the gap between the members considered to be close to each other is measured, a portion where the gap is narrow is left in a memo, and then the gap is filled. However, in this method, the gap filling shape varies depending on the width and shape of the gap. If the distance is artificially measured individually to form a gap filling shape, an artificial mistake may occur.

  Therefore, as an invention to solve the third problem, an automatic design data creation method for integrating a plurality of members that are components of a product on a CAD system, wherein an outer shape of a two-dimensional model of adjacent members is obtained. There is an automatic design data creation method characterized by having a measurement process for measuring a gap distance and a gap filling process for filling the gap with a gap filling model when the gap distance is a predetermined value or less.

  According to the said structure, the distance of the clearance gap between adjacent members is measured in two dimensions. For this reason, the distance of the gap can be automatically measured by the CAD system. For this reason, a gap filling shape can be efficiently created. The “outer shape of the two-dimensional model of the member” refers to the shape of the outer contour of the two-dimensional member. The “gap filling model” refers to a model of a gap filling member that fills gaps between a plurality of members.

  Here, the gap filling step preferably includes a step of superimposing a gap filling model made of hollow surface data on a CAD model of a member made of solid solid data and a step of solidifying the gap filling model. . As a result, the gap between the members made of solid data is filled with the solid gap filling model. For this reason, the gap can be automatically filled on the CAD.

  In creating a gap filling model consisting of surface data, a step of creating multiple tangents that touch the outer shape of the two-dimensional model of adjacent members, a step of recognizing the intersection of each tangent and the outer shape, and from each tangent Extracting a line segment having both ends of the intersection point, connecting both ends of the adjacent line segment, creating a polygonal two-dimensional gap filling model, and surfaceizing the two-dimensional gap filling model Preferably it is done. Thereby, a gap filling shape can be automatically created regardless of the shape of the gap.

  In the gap filling process, a gap filling model made of solid data may be superimposed on a CAD model of a member made of solid data.

  (6) When actually producing a product member, it is necessary to create a rough material model considering the machining allowance from the final shape. There is a method in which a designer manually designates a machining part of a member and manually creates a machining allowance there. However, in this method, since the machining allowance is manually created, human error may occur, and the design man-hours become large.

  Accordingly, as an invention for solving the third problem, an automatic design data creation method for creating a machining allowance for a machining portion of each member that is a component of a product on a CAD system, the step of recognizing the machining portion of the member There is an automatic design data creation method characterized by having a process of assigning machining allowance information to the machining section and a process of creating machining allowance in the machining section based on the machining allowance information.

  According to the above configuration, the machining allowance can be automatically created simply by inputting the machining allowance information to the CAD. For this reason, a rough material model creation operation can be performed efficiently. Here, “processing allowance information” refers to an offset amount that is a thickness amount of the processing allowance. This method of automatically creating a machining allowance can be applied to CAD data of members of all products that require a machining allowance.

  The methods (1) to (6) can be applied to the creation of CAD data of various product members. For example, it is suitable for creating CAD data of precision molded products such as precision casting and indirect powder stereolithography.

  The methods (1) to (6) can be carried out independently, or some of them can be selected and carried out. In the case of performing selection by selecting a plurality, the order does not matter.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  This example is a method of creating CAD data of a cooling structure as a product in which a large number of cylinders are connected by a cooling pipe path, as shown in the flowchart of FIG. A joint, a crossing avoiding member, and a fillet are formed in the route. A gap filling portion is formed in the adjacent cylinder. A fillet is formed between the cylinder and the thin plate. A machining allowance is formed in the machining portion of the cooling structure. The cooling structure is molded by an indirect stereolithography method, accommodated inside the mold, and supports and cools the cooling pipe inside the mold.

  FIG. 1 is a flowchart showing a procedure for creating CAD data according to the present invention. As shown in FIG. 1, this method includes (1) a route creation step shown in S10, S100, S300, and S400, (2) a route detail creation step shown in S50, S500, S600, and S700, and (3 ) Broadly divided into detailed part creation steps other than the routes shown in S200, S800, and S900.

  FIG. 2 is a block diagram showing a basic configuration of a CAD system used when three-dimensional data of a cooling structure is generated according to the present method. The CAD system includes a CPU (Central Processing Unit) 90, an input device 91 such as a keyboard and a mouse, a storage device 92 such as a hard disk, ROM, and RAM, and an output device 93 such as a display and a printer. Are connected to each other by a data bus line around the CPU 90. The storage device 92 stores a program for performing this method in advance. The storage device 92 stores in advance a program for performing the method shown in FIG. The program for performing this method includes obstacle recognition means P1 for recognizing an obstacle region, cylinder gap filling means P2, route creation means P3 for creating a route, and optimum route selection for selecting an optimum route from the created routes. Means P4, joint creation means P5 for creating a joint in the middle of the path, intersection avoidance means P6 for avoiding the paths from intersecting each other, path fillet creation means P7 for creating a fillet in the middle of the path, between the thin plate and another member This is a procedure for executing the thin plate fillet creating means P8 for creating the fillet and the machining allowance creating means P9 for creating the coarse material CAD data considering the machining allowance. In addition, data input from the input device 91 and processed data D20 processed by the CPU 90 are stored in the storage device as needed.

  The CAD system used in this method has a function of freely converting the design information of the cooling structure into any of three-dimensional solid data, surface data, and two-dimensional information.

  (1) In the path creation step, as shown in FIG. 3, three-dimensional information of the basic members including the thin plate 3, the cylinder 1 and the like constituting the cooling structure is created (S10), and the outer shape of the cylinder and the obstacle An attribute is given to the shape (S100), an obstacle is recognized (S300), and a route is automatically created while bypassing the obstacle area (S400).

  That is, in step S10, as shown in FIG. 3, the designer uses the input device 91 to allow the designer to use the three-dimensional information D11 on the basic member including the thin plate 3, the cylindrical body 1, the supply / discharge port 8, the recess 7 and the hole 76 ( (Solid solid data). Next, a dividing line to be described later is created on the thin plate of the three-dimensional information D11 (S50).

  Next, in step S100, the cylinder and obstacle attribute information D12 is input, and attributes are given to the cylinder and the obstacle. The cylinder is connected to a cooling path, and the obstacle is a member that becomes an obstacle when the path is created. The attribute information D12 is data for identifying a cylinder and an obstacle. For example, the attribute information D12 includes names such as “J001” and “W006”, position coordinates, and dimensions for each basic member. In recognizing the cylinder and the obstacle, the name of the cylinder connected by the route is selected. Then, the selected cylinder is recognized as “cylinder”, and the basic members other than the selected cylinder are recognized as “obstacles”.

  Next, the step of filling the gaps between the cylinders in step S200 is performed. This is included in (3) the detailed part creation step other than the route, and will be described later.

  Next, in step S300, the obstacle area is recognized. Details of this step are shown in the flowchart of FIG. First, the designer inputs the outer diameter information D13 of the route to be created using the input device 91 (S301). The outer diameter information D13 of the route refers to the size (diameter, etc.) of the radial cross section of the route. Next, the CPU 90 acquires the three-dimensional information D11 of the basic member from the storage device 92 (S302). As shown in FIG. 3, the basic member three-dimensional information D <b> 11 is obtained by modeling the outer shape of a basic member such as the cylindrical body 1 in three dimensions. The “outer shape of the basic member” refers to the three-dimensional outer contour of the basic member. Next, the three-dimensional information D11 is converted into two-dimensional information by making it two-dimensional from the viewing direction perpendicular to the thin plate 3 (S303). Next, the outer shape of the two-dimensional model of the obstacle is recognized from the two-dimensional information of the basic member (S304), and it is determined whether or not the outer shape of the two-dimensional model of the obstacle is a circle (S305). ). The outer shape of the two-dimensional model of the obstacle is an outer contour of a cross section formed when cut in the plane direction of the thin plate.

  When the outer shape of the two-dimensional model of the obstacle is a circle, as shown in FIG. 5, it has the same center O as the center O of the outer shape of the obstacle 6 that is a circle, and the two-dimensional model of the obstacle 6 A concentric circle whose diameter is a value obtained by adding the size r2 of the outer shape of the path 2 to the diameter r1 of the outer shape is recognized as the obstacle region 68 (S306). In other words, the obstacle region 68 has a radius obtained by adding a value r2 / 2 that is half the size of the outer shape of the path 2 to the radius r1 / 2 of the outer shape of the obstacle 6.

  If the outer shape of the two-dimensional model of the obstacle is not a circle, a circle 67 including the outer shape of the non-circular obstacle 6 is created as shown in FIG. A concentric circle whose center is the same as the circle 67 and whose diameter is a value obtained by adding the size r2 of the outer shape of the path 2 to the diameter r3 of the circle 67 is recognized as the obstacle region 68 (S307). Here, the outer shape of the obstacle 6 is a quadrangle, and the circle 67 including the outer shape of the obstacle 6 is a circumscribed circle in contact with the outer shape of the obstacle 6. In this case, the obstacle region 68 has a radius obtained by adding a value r2 / 2 that is half the size of the outer shape of the path 2 to the radius r3 / 2 of the circle 67 that includes the obstacle 6. Obstacles are not limited to quadrilaterals, but obstacle regions are recognized in the same way even if they have various shapes such as other polygons and ellipses.

  Thus, the step of recognizing the obstacle is completed. In this step, the CPU automatically performs other steps (S302 to S307) of the route outer diameter information input (S301).

  Next, in step S400, a route is automatically created between the cylinders. Details of this step are shown in the flowchart of FIG. In FIG. 8, S401 to S408 are performed by the route creation means P3, and S409 to S415 are performed by the optimum route selection means P4. S401 to S415 described below are performed in two dimensions.

  First, the CPU 90 acquires the three-dimensional information of the cylinder and the obstacle from the three-dimensional information D11 of the basic member stored in the storage device 92 (S401). The outer diameter information D13 of the route that is being acquired is acquired (S402). Next, the designer uses the input device 91 to designate cylinders connected by a route (S403). For example, as shown in FIG. 9, on the piping route setting screen displayed on the display, the system 1 is connected by a route in the order of the cylinder J002 → the cylinder W21 → the cylinder W13 → the cylinder W11 → the cylinder J018. Is specified. At this time, the positions where the paths are connected are programmed so that the upper and lower stages of the cylinders are alternately connected. Therefore, it is possible to specify whether the start position of the route is the upper stage or the lower stage. To add the next system, click “Add system”. To delete a system, click “Delete system”.

  Next, the “route creation” in FIG. 9 is clicked. Then, as shown in FIG. 10 and FIG. 11, a path 20 consisting of a straight line is automatically created between the two cylinders 1 and 1 (S404). At this time, one cylinder 1 is the start point 210 and the other cylinder 1 is the end point 220. Next, it is determined whether or not the path 20 interferes with the obstacle region 68 including the obstacle 6 (S405). This determination is made two-dimensionally as shown in the right diagram of FIG. 5, and it is determined whether or not an interference point exists between the center line 29 of the path 2 and the obstacle region 68. As shown in FIG. 10, when there is no interference point between the route 20 and the obstacle region 68, the route 20 is maintained as it is, and the process proceeds to the next S409. On the other hand, as shown in FIG. 11, when the interference point 29 exists between the path | route 20 and the obstruction area | region 68, CPU sets a detour point (S406).

  In setting the detour point, as shown in FIG. 12, a point on the outline of the surplus area 65 obtained by adding the clearance 69 to the obstacle area 68 is defined as the detour point 28. The surplus area 65 is a concentric circle having the same center point as the obstacle area 68 and having a radius larger than the obstacle area 68 by the clearance size C. Tangent lines 211 and 212 are created from the start point 210 for the surplus area 65. At this time, two tangents 211 and 212 can be created for one surplus region 65. The contacts 281 and 282 in the surplus area 65 on the tangents 211 and 212 are recognized, and the distance from the starting point 210 to the contacts 281 and 282 is measured. The contact 281 with the shorter distance is selected and set as the detour point 28.

  Next, the route is changed so as to pass through the detour point (S407). That is, as shown in FIG. 13, the route 20 made of a straight line is deleted, and a straight tangent 211 passing between the start point 210 and the detour point 28 is defined as the first route 21.

  Next, a second path 22 formed of a straight line is created between the detour point 28 and the end point 220 (S408). Next, returning to S405, it is determined whether or not the second path 22 interferes with the obstacle region 68. As shown in FIG. 13, when the second path 22 does not interfere with the obstacle region 68, the process proceeds to the next S409. As shown in FIG. 14, when the second path 22 interferes with the obstacle region 68 and has the interference point 293, the process returns to S406. Then, the detour point 27 is set by the same method as when the detour point 28 is set. Subsequently, the route is changed so as to pass through the detour point 27 (S407). That is, the route 22 made of a straight line is deleted, and the second route 23 made of a straight line is created between the detour points 28 and 27. Next, a third path 24 is created that is a straight line between the detour point 27 and the end point 220 (S408). At this time, in FIG. 14, the forward route 201 including the first route 21, the second route 23, and the third route 24 is created via the detour points 27 and 28. Next, it returns to S405 and it is judged whether the 3rd path | route 24 interferes with an obstruction area | region. In FIG. 14, since it does not interfere with the obstacle region, the process proceeds to S409. Here, when the obstacle area 68 increases, the forward path 201 (FIG. 16) from the start point 210 to the end point 220 and the reverse path 202 (FIG. 17) from the end point 220 to the start point 210 may draw completely different trajectories. Many. The forward path 201 has three detour points 28, 27 and 26, and the reverse path 202 has two detour points 261 and 281. The lengths of the forward path 201 and the reverse path 202 are also different. For this reason, it is necessary to select an optimal route, either a forward route or a reverse route.

  Therefore, next, S409 to S416 are performed by the optimum route selection means P4. First, in S409, it is determined whether or not both a forward route from the start point to the end point and a reverse route from the end point to the start point have been created. As shown in FIG. 14, when both are not created (for example, only the forward path 201 in FIG. 14), the process returns to S404. Then, as shown in FIG. 15, the reverse path 202 is created from the end point 220 to the start point 210 (S404 to S408). At this time, the end point 220 is the start point of the reverse route 202, the start point 210 is the end point of the reverse route, and the reverse route is created by the method described in S404 to S408. Thereafter, the process returns to S409, where it is determined again whether or not both the forward path from the start point to the end point and the reverse path from the end point to the start point have been created. As shown in FIG. 15, when both the forward route 201 and the reverse route 202 are created, it is determined whether the forward route 201 from the start point to the end point is the same as the reverse route 202 from the end point to the start point ( S410). If they are the same, one route, for example, the route from the end point to the start point is deleted (S411). If they are not the same, route information D21 for each route is collected and output to the display (S412). The information on each route is, for example, the length of the route and the number of detour points. The designer determines from the route information D21 of each route displayed on the screen, and selects one route (S413). Alternatively, a condition to be selected may be set in advance, and the CPU 90 may be left with a path that satisfies the condition. Next, based on the route information D21 of each route, the CPU deletes one route and leaves the other route (S414).

  In both cases of S411 and S414, it is determined whether or not the next route remains in the subsequent step (S415). If the next route remains, the process returns to S404. If not, the route is determined (S416). When the route is determined, as shown in FIG. 18, the route 2 is created three-dimensionally based on the remaining route information D21. The three-dimensional path 2 is stored in the storage device 92 as machining data D20 together with the three-dimensional information D11 of the basic members such as the cylinder 1 and the thin plate 3.

  FIG. 19 shows that in system 1, routes are created in the order of J001 → W20 → W30 → W40 → J010. For example, the route length is 120.0 in J001 → W20. When “file output” is clicked on this screen, the route additional information D22 displayed on the screen is stored in the storage device 92. When you click “Finish”, this screen disappears without being saved. Thus, the route creation process S400 ends. In S404 to S416, the route is processed as two-dimensional information. The path formed by this process is three-dimensionalized, combined with the basic member three-dimensional information D11, and stored in the storage device 92 as machining data D20. Note that the CPU automatically performs other steps (S401, S403 to S412, and S414 to S416) of obtaining the outer diameter information of the route (S402) and selecting the route (S413).

  (2) In the route detail creation step, as shown in FIG. 1, a route joint is created (S500), a route intersection avoiding unit for avoiding the intersection of the routes is created (S600), and a fillet is added to the route. Create (S700).

  That is, in step S500, a route joint creating step for creating a joint in the middle of the route is performed. This step is performed by the route joint creation means P5. Details of the route joint creation process are shown in FIG. In this step, processing is performed with three-dimensional solid data. First, as shown in FIG. 21A, after creating the basic member three-dimensional information D11 (S10), the designer uses the input device 91 such as a mouse to store the basic member three-dimensional information D11. The dividing line 8 is created on the thin plate 3 which is the coordinate plane of (S50). When creating the dividing line, consider the ease of assembly and production. For example, when the component is manufactured by the optical modeling method, the thin plate 3 is partitioned by the dividing line 8 so that the thin plate is disposed within a range where the optical modeling is possible. In this example, the thin plate 3 is divided into four by the two dividing lines 8, but may be two, three, or five or more. The shape of the partitioned thin plate 3 is not limited to a quadrangle, and may be another polygon, a circle, or the like.

  Next, as shown in FIG. 21B, after creating the path 2 and filling the gap between the cylinders in steps S100, S200, S300, and S400 as described above, as shown in FIG. 21C. In addition, the CPU 90 recognizes the intersection 81 formed between the path 2 and the dividing line 8 (S501). When the intersection 81 is recognized, the name of the intersection is displayed on the screen as “DC_WRPD_JINT_CSYS_4”, for example, as shown in FIG. Next, a coordinate system is arranged at each intersection (S502). As shown in FIG. 23A, the coordinate system 203 is perpendicular to the Z axis in the same direction as the central axis of the path 2, the X axis parallel to the thin plate and the plane 38 including the Z axis, the Z axis, and the X axis. Y axis. As shown in FIG. 22, when “Delete coordinate system” is selected, the created coordinate system is deleted.

  Next, as shown in FIG. 21D, the joint 4 is disposed at the intersection 81 (S503). A plurality of types of joints are stored in the storage device 92. As shown in FIG. 23 (b), each joint 4 has a Z axis in the central axis direction and a plane 38 parallel to the thin plate. A coordinate system 204 having a vertical X axis, a Y axis perpendicular to the X axis, and the Z axis is created. As shown in FIG. 22, the designer selects an optimum shape from several joint shapes displayed on the screen, and sets each intersection. For example, the intersection “DC_WRPD_JOINT_CSYS_4” is a part where the joint is placed, and “UDF not placed” indicating that the joint is not yet placed is displayed. When this display location is clicked, “UDF not placed” indicating that the joint has not yet been placed, “UDF new placement” indicating that the joint has been placed, “coordinate system deletion” indicating that the coordinates have been deleted Is displayed. The designer sets an appropriate state from among them. Also, the type of joint to be arranged is selected from “TYPE 1”, “TYPE 2”, and “TYPE 3”. Note that these types of joints are already stored in the storage device 92. When “UDF new arrangement” is clicked, the joint 4 is arranged such that the central axis of the joint 4 is located on the Z axis of the intersection 81 as shown in FIG. The coordinate system 203 of the path 2 and the coordinate system 204 of the joint 4 coincide.

  When the setting of the state of the intersection where the joint is to be placed and the type of the joint is completed, next, click “execute” to join the joint to the path (S504). At this time, the three-dimensional model of the path 2 and the three-dimensional model of the joint 4 are integrated. As shown in FIG. 24, this three-dimensional model can also be cut into divided panels 33 of the thin plate 3 partitioned by dividing lines. Note that when “Cancel” in FIG. 22 is clicked, the joint creation step and the route intersection avoidance step described later are canceled halfway. Thus, the route joint creation process is completed. In this step, the CPU performs the other steps (S501, S502, S504) of the dividing line creation (S50) and the joint arrangement (S503).

  Next, in step S600, a route crossing avoidance step is performed in order to avoid that the routes cross each other. This step is performed by the route intersection avoiding means P6. Details of the route intersection avoidance step are shown in FIG. In this step, processing is performed with three-dimensional solid data. In this step, first, the processing data D20 including the route information created in steps S10 to S500 is acquired from the storage device 92, and it is determined whether or not the routes intersect (S601). That is, it is determined whether or not there is an intersection between the routes. If there is an intersection, as shown in FIGS. 26 and 27B, a coordinate system 206 having an X axis, a Y axis, and a Z axis is arranged at the intersection 200 of the paths 2 and 2 (S602). . As shown in FIG. 26, the Z axis is an axis along the longer path 2 of the two intersecting paths 2, and the X axis is on a plane 38 including the Z axis and parallel to the thin plate. Be placed. The Y axis is an axis extending in a direction perpendicular to the Z axis and the X axis.

  Next, as shown in FIG. 27C, the intersection avoiding member 240 is disposed at the intersection 200 (S603). As shown in FIG. 27A, the intersection avoiding member 240 is a pipe having the same diameter as the path 2 and has a shape bent in the Y-axis direction in order to avoid interference with other paths. A plurality of types of crossing avoiding members 240 are stored in the storage device 92. The Z axis is in the central axis direction, and the X axis, the X axis, and the Z axis are present on a plane parallel to the thin plate and perpendicular to the Z axis. A coordinate system 205 having a Y axis perpendicular to is created. As shown in FIG. 22, the designer selects an optimal one from several crossing avoidance members displayed on the screen, and sets it for each intersection. For example, the intersection “DC_WRPD_CROSS_CSYS_1” is a part where the intersection avoidance member is arranged, and “UDF arranged” indicating that it is already arranged is displayed. When this display location is clicked, a predetermined state is set from various states as in the case of the joint. Also, an appropriate one (for example, “TYPE1”) is selected from various types of intersection avoidance members to be arranged. When “UDF new arrangement” is clicked, an intersection avoiding member 240 is arranged at the intersection 200 of the route 2 as shown in FIG. At this time, the coordinate system 206 of the route 2 and the coordinate system 205 of the intersection avoiding member 240 coincide with each other. As shown in FIG. 22, when “Delete coordinate system” is selected, the created coordinate system is deleted.

  Next, "execute" is clicked on the screen to join the intersection avoidance member to the route (S604). At this time, as shown in FIG. 27D, the three-dimensional model of the path 2 and the three-dimensional model of the intersection avoiding member 240 are integrated. Thus, the route intersection avoidance process ends. In this step, the CPU performs the other steps (S601, S602, S604) of the placement of the crossing avoidance member (S603).

  Next, in step S700, a route fillet creating step for creating a fillet in the middle of the route is performed. This step is performed by the route fillet creation means P7. Details of this step are shown in the flowchart of FIG. First, using the input device 91 such as a keyboard, the designer inputs path fillet information D14 for specifying the shape of the fillet (S701). As shown in FIG. 29, the fillet 260 is for joining a substantially triangular shape formed between the outside of a circle 261 that intersects the path 2 and the cylinder 1 and the intersections 262 and 263 between the path 2 and the cylinder 1. The fillet area. Therefore, the position and radius R4 of the center point 264 of the circle 261 with the intersection 267 between the path 2 and the cylinder 1 as a base point may be input as the path fillet information D14. When the position and radius R4 of the center point 264 of the circle 261 are determined, the circle 261 recognizes two intersections 262 and 263 formed between the path 2 and the cylinder 1, and the arc 265 formed between them is a fillet 260. It becomes the external shape.

  Next, the CPU 90 acquires solid data of a route from the processing data D20 created in the steps S10 to S600 from the recording device 92, and recognizes an intersecting line portion where the route intersects a basic member such as a cylinder. (S702). For example, as shown in FIG. 30A, when the path 2 intersects the cylindrical body 1 which is one of the basic members in the radial direction, the intersecting line portion 267 is a circle. As shown in FIG. 30 (b), when the path 2 is in contact with the side surface of the cylinder 1 that is filled with a gap filling portion 13 described later, the intersecting line portion 267 is a curve. As shown in FIG. 30C, when the path 2 intersects with the pedestal part 222 that supports the other path 2, the intersection line part 267 becomes an ellipse.

  Next, a fillet is created at the intersection line (S703). At this time, the cross-sectional outer shape of the fillet is created in the radial direction of the intersection line based on the path fillet information D14. That is, as shown in FIG. 29, a circle 261 that contacts both the path 2 and the cylinder 1 is created, and the intersections 262 and 263 where the circle 261 intersects the path 2 and the cylinder 1 are recognized. , 263 is created at both ends. This arc 265 becomes the cross-sectional outer shape of the fillet. Next, the cross-sectional outer shape of the fillet is created in the line length direction of the intersecting line portion 267 shown in FIG. 30 by the same method. By connecting a large number of cross-sectional outer shapes formed in the line length direction of the intersecting line portion 267, the outer shape of the fillet is formed. Three-dimensional surface data is created by surfaceizing the outer shape of the fillet. Then, this data is solidified. Thereby, as shown in FIG. 31, a fillet 260 is created in the middle of the route 2. Thus, the route fillet creation process is completed. In this step, the CPU performs other steps (S702, S703) other than the fillet information input (S701).

  (3) In the detailed part creation process other than the path, as shown in FIG. 1, a fillet is created between the thin plate as the first member and the other member as the second member (S800), and between the cylinders The gap is filled (S200), and a machining allowance is created in the machining portion of the cooling structure (S900).

  That is, in step S800, a thin plate fillet creating step of creating a fillet between the thin plate as the first member and the other basic member as the second member is performed. This step is performed by the thin plate fillet creating means P8. Details of this step are shown in the flowchart of FIG. First, the CPU 90 acquires processing data D20 (solid data) having information on the route created in S10 to S700 from the storage device 92, and from among them, the intersection information of the cylinder intersection line 97 and the recess intersection line. The intersection line information of the unit 98 is acquired (S801). In acquiring these intersection line information, the outer shape of the thin plate surface is acquired from the processing data D20. The “outer shape of the surface of the thin plate” refers to the shape of the three-dimensional outer contour of the thin plate and members formed above and below it. In this example, the cylindrical body 1 will be described as an example of another member joined to the thin plate 3 with reference to FIGS. 33 and 34. As shown in FIG. 33, the surface 31 of the thin plate 3 and the side surface 11 of the cylinder 1 intersect with each other to form a cylinder intersection line 97 as a second member intersection line. In addition, the concave portion 7 penetrating the thin plate 3 is formed on the surface 31 of the thin plate 3, and the concave portion intersecting portion 98 is formed by intersecting the surface 31 of the thin plate 3 and the side surface 71 of the concave portion 7. In S801, the intersection line information of the cylindrical body intersection line portion 97 and the intersection line information of the recessed portion intersection line portion 98 are acquired from the processing data D20 created in the above process. The intersection line information of the cylinder intersection line portion 97 and the intersection line information of the recess intersection line portion 98 are the positions and shapes of the cylinder intersection line portion 97 and the recess intersection line portion 98.

  Next, using the input device 91 such as a keyboard, the designer inputs thin plate fillet information D15 for specifying the shape of the fillet (S802). The thin plate fillet information D15 is the position and radius of a circle with the cylindrical body intersecting line portion 97 and the recessed portion intersecting line portion 98 as base points. As described in the path fillet information D14, when the position and radius of the circle are determined, two intersections formed between the path and the cylinder are recognized by the circle, and the arc formed between the circle and the outer shape of the fillet. Become.

  Next, as shown in FIG. 34A, fillets 959 and 969 made of hollow surface data are created in the cylinder intersection line 97 and the recess intersection line 98 (S803). In creating a fillet composed of hollow surface data, first, a cross-sectional outer shape of the fillet is created in the radial direction of the cylindrical intersection line 97 and the concave intersection line 98 based on the thin plate fillet information D15. This will be described with reference to FIG. 35 taking the cylinder intersection line portion 97 as an example. That is, a circle 951 that contacts both the surface 31 of the thin plate 3 and the side surface 11 of the cylindrical body 1 is created, and the intersection points 310 and 110 where the circle 951 intersects the surface 31 of the thin plate 3 and the side surface 11 of the cylindrical body 1 are recognized. An arc 950 having the intersections 310 and 110 at both ends is created from the circle 951. This arc 950 becomes the cross-sectional outer shape of the fillet 95. Next, the cross-sectional outer shape of the fillet is created in the line length direction of the cylinder intersection line portion 97 and the recess intersection line portion 98 by the same method. When a large number of cross-sectional outer shapes created in the line length direction of the cylinder intersection line portion 97 and the concave portion intersection line portion 98 are connected, the outer shape of the fillet is created. Three-dimensional surface data is created by surfaceizing the outer shape of the fillet.

  Thereafter, as shown in FIG. 34B, the fillets 959 and 969 made of surface data are solidified (S804). Next, in S805, it is determined whether or not the fillets 959 and 969 have changed solidly. The reason for the solid change is that the fillet creation part does not overlap with the solid thin plate and cylinder. For this reason, the fillet 959 made of surface data formed between the surface 31 of the thin plate 3 and the side surface 11 of the cylindrical body 1 does not overlap either the thin plate 3 or the cylindrical body 1, so that it is It really changes. Thus, the solidly changed fillet can be distinguished from the cylindrical fillet 958 that joins between the thin plate 3 and the cylindrical body 1. On the other hand, the fillet 969 formed between the surface 31 of the thin plate 3 and the side surface 71 of the concave portion 7 overlaps with the solid thin plate 3, and therefore does not change even when solidified. Therefore, the fillet that has not changed can be distinguished from the concave fillet 968 formed between the surface 31 of the thin plate 3 and the side surface 71 of the concave portion 7.

  Next, as shown in FIG. 34 (c), the recessed fillet 968 formed in the recessed portion 7 is deleted, and the tubular fillet 958 created in the tubular body 1 is left (S806). Thus, step S800 for performing fillet joining of a member such as a cylinder to the thin plate is completed. In this step, the CPU performs other steps (S801, S803 to S806) other than the input of thin plate fillet information (S802).

  Next, the description returns to step S200. In step S200, a cylinder gap filling step for filling a gap between adjacent cylinders is performed. This step is performed by the cylinder gap filling means P2. As shown in FIG. 1, this step is performed after the step S <b> 100 for assigning the attribute of the cylinder / obstacle. Details of this step are shown in the flowchart of FIG. First, as shown in FIG. 37, the CPU 90 two-dimensionalizes the three-dimensional information of the basic member including the cylindrical body 1 to obtain two-dimensional information (S201). The three-dimensional information D11 of the basic member is obtained by modeling the outer shape of the basic member such as the cylinder 1 as shown in FIG. Next, the outer diameter information of the cylinder 1 is acquired from the two-dimensional information D11 of the basic member (S202). The cylinder 1 has already been given an attribute in S100. For this reason, the cylinder can be identified from the basic members, and the external shape information of only the cylinder can be acquired. The outer diameter information of the cylinder is the position and size of the cylinder in two dimensions.

  Next, as shown in the lower part of FIG. 37, the distance L of the gap 14 between the cylinders 1 is measured two-dimensionally (S203), and it is determined whether the distance L is equal to or less than a predetermined value (S204). . The predetermined value is determined in consideration of manufacturability and assemblability. The predetermined value is, for example, a size that does not cause clogging of the molding material between the cylinders during production such as stereolithography.

  If the distance L is less than or equal to the predetermined value, a gap filling model is created to fill the gap between the cylinders (S205). In creating the gap filling model, as shown in FIG. 38, two tangents 131 that do not intersect with each other are formed in two circular cylinders 1 and 1 in two dimensions. The coordinates of the four intersections 133 between the tangent 131 and the cylinder 1 are acquired. From the coordinates of the intersection 133 and the tangent 131, a line segment 132 having the intersection 133 as both ends is created. Intersections 133 and 133 located at both ends of the adjacent line segment 132 are connected by a line segment 134. As a result, a gap filling model 130 composed of quadrilaterals 132, 134, 132, and 134 is obtained. Thereafter, the two-dimensional gap filling model 130 is turned into a surface, and a gap filling model made of surface data is created. The method shown in FIG. 38 can be applied even when the shape of the gap is various as shown in FIG. When gap 14 is formed between cylinders 1 of the same size (FIGS. 39A and 39B), when gap 14 is formed between cylinders 1 of different sizes (FIG. 39) 39 (c), (d)), when one gap 14 is formed between the cylinders 1 (FIGS. 39 (a), (c)), the gap 14 divided into two between the cylinders 1 is formed. When formed (FIGS. 39B and 39D), when a gap 14 is formed between three cylinders (FIG. 39E), a gap between four or more cylinders Even when the pattern is formed, the gap filling model can be easily created according to the method shown in FIG.

  On the other hand, when the distance L between the cylinders is larger than the predetermined value in S204, the process returns to S203 to measure the distance L between the other cylinders in two dimensions.

  Next, as shown in FIG. 40A, the cavity 100 inside the cylinder 1 is created with quilt data (surface data). Next, as shown in FIG. 40B, the gap filling model 130 made of the surface data created in S205 is arranged in the gap 14 between the cylinders 1 (S207). Next, as shown in FIG. 40C, the gap filling model 130 is solidified (S208). Thereby, the cylinder 1 and the gap filling model are integrated, and the gap filling portion 13 is formed between the cylinders 1. Next, as shown in FIG. 40 (d), the cavity 100 created by the quilt data is cut to form a space in the portion where the cavity 100 is disposed (S209). The cylindrical gap filling process is thus completed.

  Next, in step S900, a machining allowance is created in the machining portion of the member. This process is performed by the machining allowance creation means P9. Details of this step are shown in the flowchart of FIG. First, as shown in FIG. 42A, the designer uses the input device 91 to specify the processing part 190 of each member in the processing data created in S10 to S800 (S901). For example, the processed part is a part that is machined when a member is manufactured, and the rough material is cut with a margin more than the product model in anticipation of the machined part. In this example, as shown in the dotted pattern in FIG. 44, the processed portion 190 is set on the end of the cylinder 1, the inside of the cylinder 1, the inner surface of the positioning hole 76, and the back surface 34 of the thin plate 3. . Next, the designer inputs an offset value for the machining allowance with the input device 91 (S902). The offset amount is a margin amount that allows for machining. Next, as shown in FIG. 42B, the CPU 90 creates a machining allowance 191 in the machining unit 190 based on the input offset amount (S903). This completes the machining allowance creation step.

  (4) Next, in step 950 shown in FIG. 1, a confirmation process is performed. The design information created by the above steps (1) to (3) is output by the output device 93 for confirmation. The design information output from the output device 93 includes three-dimensional information on the basic member, three-dimensional product information D23 including three-dimensional information on the route, joint, intersection avoidance shape, route fillet, and thin plate fillet, and the product three-dimensional information. This is rough material three-dimensional information D24, which is design information obtained by further adding a machining allowance. Such design information can be output in the form of solid data, surface data, or two-dimensional data.

  FIG. 43 shows a product three-dimensional solid model of the cooling structure, and FIG. 44 shows a coarse material three-dimensional solid model. The coarse material 3D solid model is a model obtained by adding a machining allowance to the product 3D solid model. The rough material three-dimensional drid model and the product three-dimensional solid model are created based on the processing data D20 created in the above steps S10 to S900. In FIG. 44, the machining allowance is indicated by a dotted pattern. As shown in FIGS. 43 and 44, a plurality of cylinders 1 are connected by a cooling path 2, and the path 2 is piped while avoiding other obstacles. A joint 4 and a crossing avoiding portion 5 are formed in the middle of the route 2. The path 2 is joined to another member such as the cylinder 1 by a fillet 260. On the surface of the thin plate 3, the cylindrical body 1, the supply / discharge port 8 and the fillet 95 are joined. A gap filling portion 13 is formed in the gap 14 between the cylinders 1. As shown in the dotted pattern portion in FIG. 44, a machining allowance 191 is formed on the upper surface and the inner surface of the cylindrical body 1, the inner surface of the positioning hole 76, and the rear surface of the thin plate 3.

  The cooling structure designed according to this example is molded by a precision casting method, an indirect powder stereolithography method, a die casting method, or the like, and then assembled into a mold 92 as shown in FIG. A cooling pipe 93 that cools the cavity 95 at the center of the mold 92 is inserted into the cylindrical body 1 of the cooling structure 90. An upper plate 91 is assembled on the upper side of the cooling structure 90 to confine the refrigerant passing through the cylinder 1 and the path 2 inside the cylinder.

  According to the automatic design data creation method of this example, before the designer causes the CAD to create a route, as shown in FIG. 5, in the obstacle region recognition step S300, the obstacle 6 is two-dimensionally displayed. An obstacle region 68 having a shape obtained by adding the outer shape of the path 2 to the outer shape of the path 2 is created. For this reason, it is possible to cause the CAD to automatically create a route while avoiding the obstacle area 68. On the other hand, conventionally, when the CAD is made to create a route, as shown in FIG. 6, the designer creates the route 2 and measures the distance M to the obstacle 6, and makes a note of the portion where the distance is small. The designer changed the route 2 so as not to interfere with the obstacle 6 after that. Therefore, according to the method of this example, the number of steps for creating, measuring, and correcting the route can be reduced as compared with the conventional method, and the route can be automatically created efficiently.

  Further, in the route joint creation step S500, as shown in FIG. 20, a dividing line that is divided into product production units is created on the thin plate 3 that is a coordinate plane on which members are arranged (S50). A joint is created at the intersection with (S503, S504). For this reason, a joint can be efficiently created by CAD.

  Further, in the route intersection avoidance step S600, as shown in FIG. 25, the CAD system determines whether or not the routes intersect (S601). The crossing avoidance member having a shape that can avoid this is formed (S603, S604). For this reason, the intersection avoidance design can be efficiently performed by the CAD system.

  In the route fillet creating step S700, as shown in FIG. 28, after inputting the route fillet information, an intersection line partway along the route is automatically recognized on the CAD (S702). A fillet 260 is created (S703). For this reason, a route fillet can be automatically created by CAD.

  In the thin plate fillet creating step S800, as shown in FIG. 34, when the cylindrical body 1 is bonded to the thin plate 3 having the concave portion 7 on the surface by the fillet 95 (filling fillet), the thin plate 3 It is not necessary to form a fillet for joining in the recessed portion intersecting line portion 98 formed by intersecting the recessed portion 7 and only the tubular body intersecting portion 97 formed by intersecting the thin plate 3 and the tubular body 1. I want to form a fillet. According to the above configuration, the fillets 95 and 96 made of surface data are created in the cylinder intersection line portion 97 and the concave portion intersection line portion 98 (S803), and when solidified (804), they are created in the cylinder intersection line portion 97. The fillet 95 changes solidly. On the other hand, since the fillet 96 created in the concave intersection line 98 is already created in the thin plate 3 made of solid data, the fillet does not change solidly even if solidification processing is performed, and the data does not change at all. For this reason, the CPU can identify the solid fillet that has changed solidly as the fillet 95 that joins the thin plate 3 and the cylinder 1, and the fillet that has not changed solidly can be identified between the thin plate 3 and the recess 7. It can be identified as a fillet 96 formed between them. Therefore, the fillet 95 joining the thin plate 3 and the cylinder 1 and the fillet 96 formed between the thin plate 3 and the recess 7 can be automatically identified by the CPU. For this reason, the fillet 95 for joining can be efficiently produced between the thin plate 3 and the cylinder 1.

  In the inter-cylinder gap filling step S200, as shown in FIG. 37, the distance L between the adjacent cylinders 1 is measured two-dimensionally (S203). For this reason, the distance L of the gap can be automatically measured by the CAD system. Therefore, a gap filling shape can be efficiently created by CAD.

  Further, in the machining allowance creating step S900, as shown in FIG. 41, the designer simply inputs the offset amount of the machining allowance to the CAD (S902), and the machining allowance of each member is automatically entered into the CAD system. Can be created. For this reason, a rough material model creation operation can be performed efficiently.

  The automatic design data creation method of the present invention can be widely applied to the design of members constituting a product. For example, the present invention can be applied to the design of precision members for molds.

It is a flowchart which shows all the processes of the CAD system which performs the automatic design data creation method of this embodiment. It is a block diagram which shows all the processes of the CAD system which performs the automatic design data creation method of this embodiment. It is a figure explaining the three-dimensional information of a basic member. It is a flowchart explaining the detail of the obstruction recognition process of FIG. It is a figure explaining the recognition method of an obstacle field in case an obstacle is a circle in an obstacle recognition process. It is a figure explaining the recognition method of the obstruction in a prior art example. It is a figure explaining the recognition method of an obstacle field in case an obstacle is non-circular in an obstacle recognition process. It is a flowchart explaining the detail of the route creation process of FIG. It is a figure which shows the setting screen of a regular route in a route creation process. It is a figure explaining the creation method of a course in a course creation process. It is a figure explaining the case where there exists an obstruction area in the middle of a course in a course creation process. It is a figure explaining the determination method of a detour point in a route creation process. It is a figure explaining the creation method of the course which passes a detour point in a course creation process. It is a figure explaining the forward route created when there are two obstacles in the middle of a route in a route creation process. It is a figure explaining a forward route and a reverse route created when there are two obstacles in the course of a route creation process. It is a figure explaining the forward route created when there are three obstacles in the middle of a route in a route creation process. It is a figure explaining a reverse route created when there are two obstacles in the middle of a route in a route creation process. It is a figure which shows the three-dimensional information of a basic member and a path | route for demonstrating the path | route created at the path | route creation process. It is a figure which shows the display screen of the additional information of the path | route produced at the path | route creation process. It is a flowchart explaining the detail of the path | route joint preparation process of FIG. It is a figure explaining the route creation method of a route joint creation process. It is a figure which shows the setting screen of a joint and a crossing avoidance member in a route joint preparation process and a route crossing avoidance process. It is a figure explaining the method to create a joint in a course in a course joint creation process. It is explanatory drawing of the three-dimensional model of the cooling structure divided | segmented into multiple in a path joint preparation process. It is a flowchart which shows the detail of the route crossing avoidance process of FIG. It is explanatory drawing which shows the arrangement | positioning method of a coordinate system in a route crossing avoidance process. It is a figure explaining the route crossing avoidance method of a route crossing avoidance process. It is a flowchart which shows the detail of the path | route fillet preparation process of FIG. It is a figure explaining the creation method of the surface data of a fillet in a route fillet creation process. In the path fillet creation process, when the end of the path is joined to the side of the cylinder (a), when the side of the path is joined to the side of the cylinder (b), another path is joined to the base of the path It is a figure which shows the case (c) done. It is a perspective view of the cooling structure for demonstrating the fillet created by the path | route fillet creation process. It is a flowchart which shows the detail of the thin-plate fillet creation process of FIG. It is a figure for demonstrating the cylinder intersection line part and recessed part intersection line part which were formed on the thin plate in a thin plate fillet creation process. It is a figure which shows the method of creating a fillet on a thin plate in a thin plate fillet creating step. It is a figure explaining the creation method of the surface data of a fillet in a thin plate fillet creation process. It is a flowchart which shows the detail of the cylinder gap filling process of FIG. It is a figure which shows the measuring method of the distance between cylinders in a cylinder gap filling process. It is a figure explaining the creation method of a gap filling model in a cylinder gap filling process. It is a figure which shows the kind of gap filling model in a cylinder gap filling process. It is a figure explaining the method of filling the clearance gap between cylinders in a cylinder gap filling process. It is a flowchart which shows the detail of the process allowance creation process of FIG. It is a figure explaining the method of creating a machining allowance in a machining allowance creation process. It is a figure which shows the product three-dimensional solid model of a cooling structure. It is a figure which shows the rough material three-dimensional solid model of a cooling structure. It is sectional drawing of the cooling structure assembled | attached to the metal mold | die.

Explanation of symbols

1: cylinder, 2: route, 3: thin plate, 4: joint, 5: route intersection avoiding part, 6: obstacle, 7: recessed part, 8: dividing line, 13: gap filling part, 14: gap, 26, 27, 28, 261, 281: detour point, 65: surplus area, 68: obstacle area, 90: CPU, 91: input device, 92: storage device, 93: output device, 95, 96, 260: fillet, 190 : Processing part, 191: processing allowance, 201: forward path, 202: reverse path, 210: start point, 220: end point, 240: intersection avoidance member.

Claims (15)

An automatic design data creation method for creating a path connecting a start point and an end point with each member of a product composed of a plurality of members on a CAD system as a start point and an end point,
An attribute assigning step of assigning an attribute to the member that becomes an obstacle in creating the route;
An identification step of identifying the obstacle member as an obstacle by recognizing the attribute given to the obstacle member;
A setting step for setting the outer shape of the cross section of the path to be created;
An area recognition step for recognizing an area having a shape obtained by combining the outer shape of the cross section of the obstacle and the outer shape of the cross section of the path as an obstacle area;
An automatic design data creation method, comprising: a creation step of creating a route while bypassing the obstacle area between the start point and the end point.   The cross section of the obstacle and the cross section of the route in the region recognition step are two-dimensional models obtained by two-dimensionalizing the obstacle and the route from the same viewing direction. Automatic design data creation method.   In the region recognition step, when the outer shape of the two-dimensional model of the obstacle is a circle, the size of the outer shape of the two-dimensional model of the path is the same as the circle and the diameter of the circle is the same. The automatic design data creation method according to claim 2, wherein a concentric circle having a diameter of a value obtained by adding to is recognized as the obstacle region.   In the region recognition step, when the outer shape of the two-dimensional model of the obstacle is a non-circular shape other than a circle, the outer shape of the path is the same as the circle that includes the non-circular shape and the center point is the same. 3. The automatic design data creation method according to claim 2, wherein a concentric circle whose diameter is a value obtained by adding a size of the shape is recognized as the obstacle region.   In the creation step, a route is created between the start point and the end point, and when there is an intersection with the obstacle region on the route, the outer shape of the surplus region obtained by adding clearance to the obstacle region 5. The route according to claim 1, wherein a point on the line is set as a detour point, and the route is changed between the start point and the end point so as to pass through the detour point. Automatic design data creation method.   When there are a plurality of the obstacle areas on the route, the detour point is a point on the outline of the surplus area obtained by adding clearance to the obstacle area having a shorter distance from the start point. The automatic design data creation method according to claim 5.   The creating step selects one of a step of creating a forward route from the start point toward the end point, a step of creating a reverse route from the end point toward the start point, and the forward route and the reverse route. 7. The automatic design data creation method according to claim 1, further comprising a step of: An automatic design data creation method for creating a crossing avoidance member at a crossing point where paths connecting each member which is a component of a product cross on a CAD system,
Recognizing the intersection where the paths intersect;
Arranging a crossing avoiding member having a shape capable of avoiding a crossing at the crossing part;
And a step of coupling the intersection avoidance member with the path. An automatic design data creation method for creating a coupling member in the middle of a path connecting each member that is a component of a product on a CAD system,
Creating a dividing line that divides the product into production units on the coordinate plane on which the member is arranged;
Creating a path connecting the members;
Recognizing the intersection of the dividing line and the path;
Placing a coupling member at the intersection;
And a step of connecting the connecting member and the path. An automatic design data creation method for joining a first member and a second member, which are components of a product, with a fillet on a CAD system,
An intersection line information acquisition step of acquiring intersection line information of a second member intersection line portion formed by intersecting the surface of the first member and the side surface of the second member;
And a creation step of creating a fillet at the intersection line based on the intersection line information of the second member intersection line part. In the case where the first member and the second member are solid solid data, and the surface of the first member has a recess,
In the intersection line information acquisition step, in addition to the intersection line information of the second member intersection line portion, the intersection line information of the recess intersection line portion formed by the surface of the first member intersecting with the side surface of the recess portion is further obtained. Acquired,
The creating step creates a fillet made of hollow surface data in the second member intersecting line part and the recessed part intersecting line part;
Solidifying the fillet surface data to create a fillet of solid data; and
The fillet that has changed solidly without overlapping the solid first member is identified as a second member fillet that joins between the surface of the first member and the side surface of the second member, and the solid first Identifying the fillet that did not change overlying the member as a recessed fillet formed between the surface of the first member and the side surface of the recessed portion;
The automatic design data creation method according to claim 10, further comprising a step of deleting the recessed fillet. An automatic design data creation method for integrating a plurality of members that are components of a product on a CAD system,
A measurement process for measuring the distance between the outer shapes of the two-dimensional models of adjacent members;
And a gap filling step of filling the gap with a gap filling model when the distance of the gap is equal to or less than a predetermined value.   The gap filling step includes a step of superimposing the gap filling model made of hollow surface data on a CAD model of the member made of solid solid data, and a step of solidifying the gap filling model. The automatic design data creation method according to claim 12, wherein:   In creating the gap filling model composed of the surface data, a step of creating a plurality of tangent lines that contact the outer shape of the two-dimensional model of the adjacent member, and a step of recognizing the intersection of each tangent and the outer shape Extracting a line segment having both ends of the intersection from each tangent, creating a polygonal two-dimensional gap filling model by connecting both ends of the adjacent line segments, and the two-dimensional gap filling The automatic design data creation method according to claim 13, wherein the model is surfaced. An automatic design data creation method for creating a machining allowance for a machining portion of each member that is a component of a product on a CAD system,
Recognizing a processed portion of the member;
A step of providing machining allowance information to the machining portion;
And a step of creating a machining allowance in the machining part based on the machining allowance information.

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