JP2009080744A - Cost calculation system for wiring harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce man-hours when calculating the cost of a wiring harness, and to improve the accuracy of a calculation result. <P>SOLUTION: A cost calculation system 10 is provided with a CAD device 11 and a cost calculation device 12. When component graphics representing wirings or components of the wiring harness are placed on a drawing, the CAD device 11 describes a corresponding record in CAD model data 21. Meanwhile, when the component graphics are placed in association with one another, the CAD device 11 describes link information between records in the CAD model data 21. The cost calculation device 12 calculates wire lengths, the types and number of components, and processing work with the CAD model data 21, on the basis of the records and link information included in the CAD model data 21. Moreover, the cost calculation device 12 accesses databases 32, 33 to make inquiries about the unit cost of the wires and components, and unit man-hours of processing work to calculate the cost of the wiring harness. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a system for calculating the cost of a designed wire harness.

  Wire harnesses used as parts in automobiles, various electronic devices, etc. are designed by wire harness manufacturers according to their use, manufactured and then shipped from a factory. In various situations, such as when designing a wire harness, during a business negotiation, when planning a manufacturing process, and when planning a staffing plan, information about the cost of the wire harness may be required. .

  Patent Document 1 discloses an estimation system that outputs an estimated amount of a component unit price generated when a wire harness is manufactured. The harness processing estimation system includes a storage unit that stores an estimation function for obtaining an estimate of a target harness from a specified harness processing condition, an input unit that inputs a processing condition from an external terminal, and the estimation function And a control circuit for obtaining an estimate for the target harness from the processing conditions. Further, the estimation function is a function for calculating the component unit price of the target harness from the processing conditions of the harness.

In Patent Document 1, it is assumed that the estimated price of the component unit price can be quickly output by this estimation system.
JP 2004-133828 A

  However, in the estimation system disclosed in Patent Document 1, it is necessary for an estimate applicant to input machining conditions into the system, which takes time and man-hours. In addition, it is conceivable that a person who wishes to estimate inputs a machining condition by mistake, and there remains room for improvement from the viewpoint of improving accuracy and reliability of the estimation.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cost calculation system that can reduce the man-hour when calculating the cost of the wire harness and has high accuracy of the output result.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the viewpoint of this invention, the cost calculation system of the wire harness of the following structures is provided. That is, the cost calculation system includes a CAD unit that can create CAD model data corresponding to a design drawing of a wire harness, and a cost calculation unit that inputs the CAD model data and calculates the cost of the wire harness. . When the operator places a component graphic representing an electric wire or part of a wire harness on the drawing, the CAD unit describes the corresponding component data in the CAD model data. In addition, when the CAD unit arranges the component graphic so as to be related to another component graphic already arranged, link information for associating the component data with each other is described in the CAD model data. Configured as follows. The cost calculation unit stores a unit price database that associates and stores the wires and parts of the wire harness and the unit price thereof, a processing operation related to the wires and parts of the wire harness, and a unit processing manhour that associates and stores them. And comprising. And the said cost calculation part is comprised so that the following 1st-3rd steps may be performed. That is, in the first step, CAD model data created by the CAD unit is input. In the second step, the component data described in the CAD model data is traced based on the link information, thereby obtaining the wire length of the wire harness and the type and number of parts constituting the wire harness, The processing work required to complete the wire harness is sought. In the third step, based on the result obtained in the second step, an inquiry is made to the unit price database and the unit manhour database, and the cost of the wire harness related to the CAD model data is calculated by counting the obtained results. Ask.

  With this configuration, it is possible to calculate the cost of the wire harness by creating CAD model data as if the CAD unit designed the wire harness, and processing the CAD model data with the cost calculation unit. Therefore, it is not necessary for the operator to input parts, machining conditions, etc., and the cost estimation work can be saved significantly. In addition, since the data created by the CAD unit contains information on the components and their relationships, and estimates are calculated based on the information, costs can be calculated accurately by preventing input errors and reliability. High cost calculation becomes possible. Furthermore, since the relationship between the components is described by the link information, the relationship between the components can be expressed simply and flexibly even in a wire harness having a complicated structure, and the cost calculation can be accurately performed.

  In the cost calculation system for the wire harness, the cost calculation unit may perform different processing operations even when the component data is the same, even if the component data associated with the link information is different. It is preferable to be configured so that it can be handled as generated.

  With this configuration, the calculated cost can be changed depending on how the components of the wire harness are linked. As a result, it is possible to calculate a fine cost in accordance with the actual situation of the machining operation, and the cost calculation accuracy is further improved.

  In the wire harness cost calculation system, the link information is preferably link information in both directions.

  With this configuration, since it is possible to freely traverse the link between the component data, it is not necessary to consider the order of tracing the link in the second step. Therefore, the component data can be checked without omission by a simple process, and the wire length, the number of parts, etc. can be obtained accurately.

  The wire harness cost calculation system preferably has the following configuration. That is, a CAD model database capable of storing CAD model data created by the CAD device is provided. When the CAD model data is accumulated in the CAD model database, the cost calculation unit automatically performs the first step to the third step to calculate the cost.

  With this configuration, the cost can be calculated with a simple operation. Further, since the original CAD model data can be stored in the CAD model database, for example, when the unit unit price or unit man-hour changes, the CAD model data can be read again from the CAD model database and the cost can be easily recalculated.

  The wire harness cost calculation system preferably has the following configuration. That is, a harness cost database capable of storing the cost of the wire harness calculated in the third step is provided. The cost calculation system is configured to be able to output the cost of the obtained wire harness by referring to the contents of the harness cost database in response to an inquiry from an external terminal.

  With this configuration, the cost of the wire harness can be centrally managed and unified handling can be performed, and the cost information of the wire harness can be easily extracted and effectively used using an external terminal.

  Next, embodiments of the invention will be described. FIG. 1 is a block diagram showing an electrical configuration of a cost calculation system for a wire harness according to an embodiment of the present invention. 2, 4, 6, 8, 9, 11, 12, 14, and 16 sequentially show how the wire harness is designed in the CAD apparatus.

  As shown in FIG. 1, the cost calculation system 10 includes a plurality of computers, a CAD device (CAD unit) 11 for designing a wire harness, and a cost calculation device (cost) for calculating the cost of the wire harness. Calculation unit) 12. In the present embodiment, the CAD device 11 and the cost calculation device 12 are configured by general-purpose personal computers.

  The CAD device 11 is a drawing device that performs design with the support of a computer (Computer-Aided Design). Although not shown, the CAD device 11 includes a CPU as a calculation unit, and ROM, RAM, and HDD as storage units. Further, the CAD device 11 includes input means such as a keyboard and a mouse, and output means such as a display.

  A CAD program is preinstalled in the CAD device 11. The operator operates the CAD device 11 to execute a CAD program, designs a wire harness on the display, and creates CAD model data 21 describing design data. In this embodiment, this CAD program is configured as a so-called two-dimensional CAD.

  The cost calculation device 12 includes a CPU as a calculation unit, and ROM, RAM, and HDD as storage units. The cost calculation device 12 is connected to the CAD device 11 via a network such as a LAN.

  An appropriate database program is installed in the cost calculation device 12. With this software and the above hardware, a CAD model database 31, a wire / part unit price database 32, a machining item unit manhour database 33, and a wire harness cost database 34 are constructed in the cost calculation device 12.

  The cost calculation device 12 is installed with a wire harness cost calculation program. As a result, the cost calculation unit 41 is constructed in the cost calculation device 12. In addition, the cost here is one or a plurality of expenses among an electric wire cost, a parts cost, a processing cost, a management cost, a profit, and the like.

  The CAD model database 31 is a database for accumulating CAD model data 21 input from the CAD device 11.

  The electric wire / part unit price database 32 is a database that stores the electric wires and parts of the wire harness and the unit price in association with each other.

  The processing item unit man-hour database 33 is a database that stores processing related to electric wires and parts of the wire harness and the unit processing man-hours in association with each other.

  The wire harness cost database 34 is a database that stores the cost calculated by the cost counting unit 41 for the designed wire harness.

  In the present embodiment, external terminals 15 and 16 are connected to the cost calculation apparatus 12 via a network. The operator operates one of the external terminals 15 and 16 to access the cost calculation device 12 as a server and inquires about the cost of the designed wire harness. In response to this inquiry, the cost calculation device 12 refers to the wire harness cost database 34 to acquire the cost and transmits it to the external terminals 15 and 16. Thereby, the cost of a wire harness can be acquired in the external terminals 15 and 16, and it can refer to business negotiation, a process plan, etc.

  Next, creation of CAD model data 21 in the CAD apparatus 11 will be described. When designing the wire harness, the operator executes the CAD program of the CAD device 11 and selects a menu for creating a new drawing. Then, an area for storing the CAD model data 21 is secured in the memory of the CAD device 11, and an empty drawing is displayed on the screen. The CAD model data 21 is in the form of a table, and records (component data) having various fields can be described. When the CAD apparatus 11 is operated to place a graphic such as a straight line, a curve, or a symbol on the drawing, a corresponding record is added to the CAD model data 21.

  When designing a wire harness with the CAD device 11, the operator first inputs the product number of the wire harness. Specifically, the operator appropriately operates the CAD device 11 and designates the product number input from the menu on the screen. Then, a product number input window 61 is displayed on the screen of the CAD device 11 as shown in FIG. In this dialog, the operator inputs the product number, for example, “AAA”, “BBB”, etc. from the keyboard, and clicks the OK button with the mouse when the input is completed.

  When the designation of the product number is completed, the CAD device 11 waits for an instruction of the drawing position of the product number in the drawing. This is shown in FIG. The operator operates the mouse to move the cursor 22 and clicks a desired position on the screen. Then, the product numbers of AAA and BBB input in the product number input window are drawn.

  After designating the drawing position, the CAD device 11 displays a circuit input window 62 on the screen as shown in FIG. 2C, and inquires the operator of various information (attributes) of the circuit constituting the product number. The operator inputs information such as line type, wire diameter, wire color, and circuit symbol in this dialog. In FIG. 2C, the abbreviation “AVSS” meaning an ultra-thin type low-voltage electric wire for automobiles is designated as the line type, “0.5” is designated as the wire diameter (wire size), and black is represented as the line color A state in which “B” is designated and “A1” and “B1” are designated as circuit symbols is shown. When the input is completed, the operator clicks “OK”, and the operation relating to the product number and the circuit is completed.

  As a result of the series of operations shown in FIG. 2, a product number record and a circuit record are added to the CAD model data 21 of the CAD apparatus 11 as shown in FIG. The product number record has fields such as component product number 1, component product number 2, and the like. The contents entered in the product number input window 61 are described in these fields. The circuit record has fields such as a line type, a wire diameter, a wire color, and a circuit symbol, and the contents input in the circuit input window 62 are described in these fields.

  An ID “H1” is assigned to the added product number record, and an ID “K1” is assigned to the circuit record. These IDs are for uniquely identifying each record in the CAD model data 21. In the future description, similarly, each time a record is newly added to the CAD model data 21, a unique ID is assigned to the record.

  The circuit record has a parent element number field and a child element number field in addition to the above fields. The number of parent elements and the number of child elements are related to link information, and details will be described later.

  Next, the operator places the segment of the wire harness on the drawing. The segment is a design concept that means each section obtained by appropriately dividing the wire arrangement section of the wire harness.

  Specifically, the operator appropriately operates the CAD device 11 and designates the segment arrangement from a menu on the screen. Then, the segment length and angle are input from the keyboard in the segment information input window 63 displayed as shown in FIG. FIG. 4A shows a state in which “50” is designated as the segment length and “0” is designated as the angle.

  Then, the start point of the segment is designated with the mouse as shown in FIG. Then, a symbol graphic (component element graphic) representing a segment having a specified length and a specified angle is drawn at a specified position. Since “0” (0 °) is designated as the angle in the segment information input window 63, the segment extends from the point designated by the cursor 22 in the X-axis direction as shown in FIG. Drawn. In the drawing, a number “50” as the segment length is drawn.

  By the operation of FIG. 4, the segment record and the node record are added to the CAD model data 21 of the CAD apparatus 11 as shown in FIG. The node means a point located at both ends of the segment, and the node can be used as a reference point for component placement in the CAD device 11 or a connection point of a plurality of segments. In FIG. 5, two node records are added. An ID of “N1” indicates a node at the start of the segment, and an ID of “N2” indicates a node at the end of the segment.

  Each node record has an X coordinate field and a Y coordinate field representing the position, and a coordinate value based on the arrangement position of the segment is described in this field. In the figure, the contents of the X coordinate and Y coordinate fields are simply shown as (X) (Y), but in reality, specific numerical values based on the segment position designated by the operator are described. .

  Further, the segment record has a segment length field, and the contents of the segment length input in the segment information input window 63 are described in this field.

  In the CAD model data 21, the relationship that the node is located at the end point of the segment is represented by link information of each record. That is, when a certain node is located at one end of a specific segment, a parent-child relationship is set such that the node is a parent and a segment is a child, and this is represented by link information. In this embodiment, this link information is realized by describing the ID of the link destination record in the parent element ID field or the child element ID field.

  For example, by describing the segment record ID “S1” in the child element ID field of the node record “N1”, the segment record “S1” can be linked as a child to the node record “N1”. This link can represent a parent-child relationship in which the node is a parent and a segment is a child. Also, by describing the node record ID “N1” in the parent element ID field of the segment record “S1”, the node record “N1” can be linked to the segment record “S1” as a parent, which is the same as above. The parent-child relationship can be expressed. This parent-child relationship can represent that the node “N1” is located at the end point of the segment “S1”.

  When the operator arranges a segment on the drawing, the CAD device 11 stores a segment record “S1” corresponding to the segment and node records “N1” and “N2” corresponding to both ends of the segment in the CAD model data 21. to add. Then, in the segment record “S1”, two parent element ID fields are inserted, and the ID “N1” and “N2” of each node record are described. On the other hand, in each of the node records “N1” and “N2”, one child element ID field is inserted, and the segment record ID “S1” is described. As described above, the CAD device 11 automatically describes the link information of the parent-child relationship between the segment and the two nodes.

  The parent element number field and the child element number field in each record are fields indicating the number of parent element ID fields and the number of child element ID fields. For example, in the segment record “S1”, since there are two parent element ID fields and zero child element ID fields, the contents of the parent element number field are “2” and the contents of the child element number field are “0”. is there. The contents of the parent element number field or the child element number field are automatically updated by the CAD device 11 every time a parent element ID or child element ID field is inserted into the record.

  FIG. 6 shows the operation of adding one more segment to the drawing. That is, the segment arrangement is instructed to the CAD device 11, the segment information input window 63 shown in FIG. 6A is designated with a segment length of “50” and an angle of “180”, and the start point of the segment is shown in FIG. Specify with the mouse as in b). Here, the same position as the starting point when the segment is arranged in FIG. 4 is designated by the cursor.

  As described above, the segment is drawn on the screen of the CAD apparatus 11. Since “180” (180 °) is designated as the segment angle this time, the segment is drawn so as to extend in the direction opposite to the X axis from the point designated by the cursor 22. Accordingly, a new segment is arranged so as to connect to the segment arranged in FIG. In the drawing, a number “50” as the segment length is drawn.

  In response to the above operation, as shown in FIG. 7, the CAD apparatus 11 adds the segment record “S2” corresponding to the segment to the CAD model data 21 and the node record “N3” corresponding to one end of the segment. "Is added. In the segment record “S2”, two parent element ID fields are inserted, and IDs “N1” and “N3” of node records corresponding to the nodes at both ends of the segment are described. On the other hand, in the node records “N1” and “N3”, child element ID fields are inserted one by one, and the segment record ID “S2” is described.

  Next, in the drawing, a connector is added at a position corresponding to one end of the electric wire in the segment. As a specific operation, the CAD device 11 is instructed to arrange the connector, and the connector name input window 64 is displayed as shown in FIG. 8A, and the name and number of the connector are designated. Here, it is assumed that “CONN-X” is designated as the name and “1” is designated as the number. Then, as shown in FIG. 8B, the position of the connector is designated with the cursor 22. Here, one end of the segment arranged in a straight line is designated. Then, the leader line is drawn from the designated position, and the connector graphic (component graphic), the connector name “CONN-X”, and the connector number are drawn.

  9A and 9B show an operation of placing a connector with the name “CONN-Y” and the connector number “2” at the other end of the electric wire. Since this operation is the same as in FIG. 8, the description thereof is omitted.

  Corresponding to the above operation, the CAD apparatus 11 adds connector records “C1” and “C2” corresponding to the two connectors to the CAD model data 21 as shown in FIG. The connector record “C1” corresponds to the connector graphic arranged in FIG. 8, and the connector record “C2” corresponds to the connector graphic arranged in FIG. Each connector record has a connector name field and a connector number field, in which the contents designated in the connector name input window 64 shown in FIGS. 8A and 9A are described.

  Then, in the connector record “C1”, the parent element ID field is inserted, and the ID “N2” of the node record corresponding to the arrangement position of the connector is described. The parent element ID field is also inserted in the connector record “C2”, and the ID “N3” of the node record corresponding to the connector arrangement position is described. On the other hand, in the node record “N2”, one child element ID field is inserted, and the ID “C1” of the corresponding connector record is described. Similarly, in the node record “N3”, one child element ID field is inserted, and the ID “C2” of the corresponding connector record is described.

  As described above, the parent-child relationship can be expressed by describing the link information in the connector record and the node record. This parent-child relationship means that the connector is arranged at the node. The CAD device 11 automatically describes the link information in response to an operation of placing a connector graphic at the end of the segment.

  Next, a circuit is arranged in the connector portion. As a specific operation, the CAD device 11 is instructed to arrange a circuit, and a target connector for designating a circuit is designated with the cursor 22 as shown in FIG. FIG. 11A shows a case where the connector arranged in FIG. 9 is designated. Next, in the circuit arrangement window 65 displayed on the screen as shown in FIG. 11B, a circuit symbol is designated from the keyboard. Here, the case where “A1” is designated as the circuit symbol is shown. When the designation of the circuit symbol is completed, the circuit symbol “A1” is drawn on the connector as shown in FIG.

  FIGS. 12A to 12C show a case where the circuit of the circuit symbol “B1” is arranged in the other connector, and the operation is the same as that in FIG. To do.

  The circuit symbols “A1” and “B1” designated by the above operation are both circuit symbols designated in the circuit input window 62 of FIG. Therefore, as shown in FIG. 13, the CAD device 11 inserts two parent element ID fields in the circuit record “K1” added by the circuit input operation in FIG. 2 and inserts the IDs “C2” and “2” of the two connector records. C1 "is described. Further, a child element ID field is inserted in each of the connector records “C1” and “C2”, and the ID “K1” of the circuit record is described.

  As described above, the parent-child relationship can be expressed by describing the link information in the connector record and the circuit record. This parent-child relationship means a relationship in which the circuit is arranged in the connector. The CAD device 11 automatically describes the link information in accordance with an operation of placing a circuit on the connector.

  Next, an operation of placing an exterior component (clamp) on the wire harness is performed. As a specific operation, the CAD device 11 is instructed to place a clamp, and in the clamp placement window 66 displayed on the screen as shown in FIG. Here, “CL-123” is designated as the component name, and “0” is designated as the distance. Then, as shown in FIG. 14B, the position of the clamp is designated with the cursor 22. Here, one of the two connected segments is designated. Then, the clamp graphic (component graphic) is drawn at the designated position, and the clamp name “CL-123” is drawn together with the leader line.

  In response to the above operation, the CAD device 11 adds the exterior part record “B1” to the CAD model data 21 as shown in FIG. The exterior part record has fields of a part name and a distance, and the contents designated in the clamp arrangement window 66 in FIG. Then, the CAD device 11 describes the ID “S2” of the segment record corresponding to the segment in which the clamp is arranged in the parent element ID field of the exterior part record “B1”. Further, a child element ID field is inserted in the segment record “S2”, and the ID “B1” of the exterior part record is described.

  Thus, the parent-child relationship can be expressed by describing the link information in the segment record and the exterior component record. This parent-child relationship means a relationship in which the clamp is arranged in the segment. The CAD device 11 automatically describes the link information in accordance with an operation of designating a segment and placing a clamped figure.

  Next, an operation of placing the tape on the clamp is performed. As a specific operation, the CAD device 11 is instructed to place a tape, and in the tape placement window 67 displayed as shown in FIG. 16A, the vertical dimension, horizontal dimension, distance, and tape name are designated from the keyboard. . In this example, “20” is specified as the vertical dimension, “20” as the horizontal dimension, “22” as the distance, and “VT-ABC” as the tape name. Next, in the exterior component instruction window 68 displayed as shown in FIG. 16B, the exterior component to be wound is designated. FIG. 16B shows an example in which the name “CL-123” of the clamp arranged in FIG. 14 is designated. Further, as shown in FIG. 16C, the position of the tape is designated with the cursor 22. Then, a tape figure (component figure) is drawn at the position.

  In response to the above operation, the CAD apparatus 11 adds the tape record “T1” to the CAD model data 21 as shown in FIG. The tape record has fields for a tape name, a vertical dimension, a horizontal dimension, and a distance, and the contents designated in the tape placement window 67 of FIG. Then, the CAD device 11 describes the ID “B1” of the exterior component record corresponding to the exterior component instructed in the exterior component instruction window 68 of FIG. 16B in the parent element ID field of the tape record. Further, a child element ID field is inserted in the exterior part record “B1”, and the ID “T1” of the tape record is described.

  Thus, the parent-child relationship can be expressed by describing the link information in the exterior component record and the tape record. This parent-child relationship means a relationship in which the tape is placed (wound) around the clamp. The CAD device 11 automatically describes the link information in accordance with an operation of placing a tape figure on a segment where a clamp is placed.

  The operator operates the CAD device 11 as described above, arranges the component graphic of the wire harness on the drawing, and sets various attributes as necessary, thereby finally completing the design drawing of the wire harness. . Thereafter, the operator selects save file from the menu of the CAD device. Then, the contents of the CAD model data 21 shown in FIG. 17 are saved in a file. As this file format, for example, various formats such as a binary format and an XML format are conceivable.

  The operator appropriately operates the CAD device 11 and uploads the file of the CAD model data 21 to the cost calculation device 12 via the network. Then, the flow shown in FIG. 18 is executed on the cost calculation device 12 side.

  As shown in the flow of FIG. 18, when the CAD model data 21 is input to the cost calculation device 12, the CAD model data 21 is accumulated in the CAD model database 31 (S101). Next, one arbitrary record of CAD model data 21 is selected, and the description content of the record is examined. In the case of a segment record, the wire length is calculated. In the case of other records, the number of parts and various processing items are calculated. The number is calculated (S102).

  In the calculation of S102, the wire length can be obtained as the sum of the segment lengths of the respective segment records. Moreover, the number of each component can be obtained as the number of connector records or clamp records, for example.

  On the other hand, when calculating the number of various processing items, the contents of other records linked to the record are also considered. For example, when the link information for the segment record is only described in the tape record, this means that a work for winding the tape around the electric wire occurs. On the other hand, as shown in FIG. 17, when the link information to the exterior part record is described in the tape record and the link information to the segment record is described in the exterior part record, the exterior part is fixed to the electric wire by tape winding. This means that man-hours are different from simply wrapping tape around a wire. The cost calculation device 12 determines the type of machining work required based on which record each record is linked to, and tabulates each machining work.

  When the process of S102 is completed for one record, it is checked whether or not all the records have been processed (S103). If there is an unprocessed record, the record linked to the record is set as the next record (S104). That is, the record of the ID described in the parent element ID field or the child element ID field of the current record is set as the next process record. Thereafter, the processing returns to S102, and the processing of S102 to S104 is repeated until the processing of all the records is completed. As described above, it is possible to check all the records of the components linked to each other in the CAD model data 21, and to grasp and totalize the wire length of the wire harness, the number of parts, and the processing work.

  Next, the cost calculation device 12 inquires the electric wire / component unit price database 32 about the types of electric wires and components, and acquires the unit prices of the electric wires and components constituting the wire harness (S105). Further, the processing item unit man-hour database 33 is inquired about the type of processing operation and the like, and the unit man-hours of the various processing operations that have occurred are acquired (S106).

  Next, the cost of the wire harness is calculated based on the obtained unit price and unit man-hour (S107). Then, the calculation result is stored and accumulated in the wire harness cost database 34 (S108).

  The cost calculation processing is realized by the above flow, and the calculated cost can be acquired by the external terminals 15 and 16 accessing the cost calculation device 12 as described above, and can be used in various situations.

  As described above, the cost calculation system 10 according to the present embodiment includes the CAD device 11 and the cost calculation device 12. The CAD device 11 is configured to be able to create CAD model data 21 corresponding to a design drawing of a wire harness. The cost calculation device 12 is configured to input the CAD model data 21 and calculate the cost of the wire harness. The CAD device 11 is configured to describe a corresponding record in CAD model data when an operator arranges figures such as segments, connectors, and clamps representing the wires or parts of the wire harness on the drawing. Further, when the operator arranges the graphic so as to be related to another graphic already arranged, the CAD device 11 describes link information that associates the records with each other in the CAD model data. Composed.

  The cost calculating device 12 includes an electric wire / part unit price database 32 and a processing item unit man-hour database 33. The electric wire / part unit price database 32 stores the electric wires and parts of the wire harness and the unit price in association with each other. The processing item unit man-hour database 33 stores processing operations related to the wires and parts of the wire harness and the unit processing man-hours in association with each other.

  Further, the cost calculation device 12 is configured to execute the following steps in order. That is, the CAD model data 21 created by the CAD device 11 is input in the process of S101. Next, in the processing of S102 to S104, while tracing the record described in the CAD model data 21 based on the link information, while obtaining the wire length of the wire harness and the type and number of components constituting the wire harness, A processing operation required to complete the wire harness is obtained. Further, in the processing of S105 to S107, the electric wire / part unit price database 32 and the processing item unit manhour database 33 are inquired based on the results obtained in the processing of S102 to S104, and the obtained results are totaled. The cost of the wire harness according to the CAD model data 21 is obtained.

  As a result, CAD model data 21 is created as if designing a wire harness using the CAD device 11, and the cost calculation device 12 processes the CAD model data 21, thereby calculating costs such as the component cost and processing cost of the wire harness. can do. Therefore, it is possible to save labor for the operator to input parts and machining conditions, and the labor for cost estimation can be saved significantly. In addition, since the data created by the CAD device 11 includes information about the types of electric wires, parts, and their mutual relationships, and estimates are calculated based on the information, it is possible to prevent input errors and accurately calculate costs. Reliable estimation is possible. In addition, since the mutual relationship of records is described by link information, even if the wire harness has a complicated structure, the mutual relationship between electric wires and parts can be expressed simply and flexibly, and cost calculation can be performed accurately. Can do.

  Further, the cost calculation device 12 is configured to be able to handle the same record as a case where different processing work occurs when the contents of the counterpart record associated by the link information are different. ing. For example, in the case of a tape record, the link destination is either an exterior part record or a segment record, and it can be handled as if the processing work for winding the tape is different.

  Thereby, the calculated process cost can be changed depending on how the components of the wire harness are linked. As a result, it is possible to make a fine estimate in accordance with the actual situation of the machining operation, and the cost calculation accuracy is further improved.

  In the present embodiment, the link information described in the CAD model data 21 is bi-directional link information. For example, when the exterior component record ID “B1” is described in the parent element ID field in the tape record “T1” in FIG. 17, the tape record ID “T1” is stored in the child element ID field in the exterior component record “B1”. "Is described, and the link can be traced from both directions.

  As a result, it is possible to freely trace back and forth between records, so that it is not necessary to consider the order in which links are traced in the processing of S102 to S104 in FIG. Therefore, it is possible to check all records without omission by a simple process, and to accurately determine the length of the electric wire, the number of parts, and the like.

  Further, the cost calculation device 12 includes a CAD model database 31 capable of storing the CAD model data 21 created by the CAD device 11. When the CAD model database 31 is stored in the CAD model database 31, the cost calculation device 12 automatically performs the processing of S102 to S107 in FIG. 18 to calculate the cost.

  Thereby, the cost can be calculated with a simple operation. Further, by accumulating the original CAD model data 21 in the CAD model database 31, for example, when the unit unit price or unit man-hours fluctuates, the CAD model data 21 is read again from the CAD model database 31 to facilitate cost reduction. Can be recalculated.

  Further, the cost calculation device 12 includes a wire harness cost database 34 that can store the calculated cost of the wire harness. In addition, the cost calculation device 12 is configured to be able to output the cost of the obtained wire harness to the external terminals 15 and 16 by referring to the contents of the wire harness cost database 34 in response to an inquiry from the external terminals 15 and 16. .

  As a result, the wire harness cost can be centrally managed and unified handling can be performed, and information on the cost of the wire harness can be easily extracted using the external terminals 15 and 16 and can be effectively used.

  Although a preferred embodiment of the present invention has been described above, the above configuration can be modified as follows, for example.

  It is possible to change the configuration so that the CAD device 11 and the cost calculation device 12 are not connected via a network. In this case, for example, the CAD model data 21 may be stored in an appropriate external storage medium by the CAD device 11, and the CAD model data 21 may be read by connecting the external storage medium to the cost calculation device 12.

  The CAD device 11 and the cost calculation device 12 can be integrated, and the functions of both devices can be changed to be realized by one computer. Further, the databases 31 to 34 of the cost calculation device 12 can be changed to be realized by a computer different from the cost calculation device 12.

  Information described in each record of the CAD model data 21 can be variously changed. Further, it is possible to change so that equal link information that does not set the parent / child relationship is described in each record. Moreover, the link information described in each record of the CAD model data 21 can be changed to a one-way link.

The block diagram which shows the electric constitution of the cost calculation system of the wire harness which concerns on one Embodiment of this invention. The figure which shows operation which inputs a product number and a circuit in the design of the wire harness which uses a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG. 2 was performed. The figure which shows operation which arrange | positions a segment with a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG. 4 was performed. The figure which shows operation which arrange | positions a segment further with a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG. 6 was performed. The figure which shows operation which arrange | positions a connector with a CAD apparatus. The figure which shows operation which arrange | positions a connector further with a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG.8 and FIG.9 was performed. The figure which shows operation which arrange | positions a circuit in one connector in a CAD apparatus. The figure which shows operation which arrange | positions a circuit in the other connector with a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG.11 and FIG.12. The figure which shows operation which arrange | positions a clamp with a CAD apparatus. The figure which shows the content of CAD model data after operation of FIG. The figure which shows operation which arrange | positions a tape with a CAD apparatus. The figure which shows the content of the CAD model data after operation of FIG. The flowchart which shows the process performed with a cost calculation apparatus.

Explanation of symbols

10 Cost calculation system 11 CAD device (CAD section)
12 Cost calculation device (cost calculation unit)
15, 16 External terminal 31 CAD model database 32 Electric wire / part unit price database (unit price database)
33 Machining unit unit man-hour database (unit man-hour database)
34 Wire harness cost database

Claims (5)

A CAD section capable of creating CAD model data corresponding to a design drawing of a wire harness;
A cost calculation unit that inputs the CAD model data and calculates the cost of the wire harness;
With
When the operator arranges the component graphic representing the electric wire or part of the wire harness on the drawing, the CAD unit describes the corresponding component data in the CAD model data and other already arranged components. When the component graphic is arranged so as to be associated with the component graphic, it is configured to describe link information that associates the component data with each other in the CAD model data,
The cost calculation unit
A unit price database for storing the wires and parts of the wire harness in association with the unit price;
A unit man-hour database for storing processing related to electric wires and parts of the wire harness and the unit processing man-hours,
With
The cost calculation unit
A first step of inputting CAD model data created by the CAD unit;
By tracing the component data described in the CAD model data based on the link information, the wire length of the wire harness and the type and number of parts constituting the wire harness are obtained, and the wire harness is completed. A second step for obtaining a machining operation necessary for
Based on the result obtained in the second step, a query is made to the unit price database and the unit man-hour database, and a third step of obtaining the cost of the wire harness related to the CAD model data by aggregating the obtained results; ,
A wire harness cost calculation system characterized by: The wire harness cost calculation system according to claim 1,
The cost calculation unit is configured such that even if the component data is the same, if the component data of the counterpart associated by the link information is different, the cost calculation unit can be handled as if different processing operations occur. The cost calculation system of the wire harness characterized by the above-mentioned. A cost calculation system for a wire harness according to claim 1 or 2,
The link information is bi-directional link information, and the wire harness cost calculation system is characterized in that: It is the cost calculation system of the wire harness as described in any one of Claim 1 to 3,
A CAD model database capable of storing CAD model data created by the CAD device;
When the CAD model data is accumulated in the CAD model database, the cost calculation unit automatically performs the first step to the third step, and the cost is calculated. Cost calculation system. It is the cost calculation system of the wire harness as described in any one of Claim 1 to 4,
A harness cost database capable of storing the cost of the wire harness calculated in the third step;
A wire harness cost calculation system configured to be able to output the cost of the obtained wire harness by referring to the contents of the harness cost database in response to an inquiry from an external terminal.

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