JP2000076333A - Working progress designing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten development period, to improve product quality and to lower the manufacturing cost by enhancing the reliability of process design for welded components and automating the design by adding information regarding welding to a three-dimensional CAD model. SOLUTION: When a necessary welded product is manufactured, respective operation processes including a welding process are automatically set according to a three-dimensional CAD model having component information and weld line information on the product and the device is equipped with a data input part 25 which converts respective pieces of information from the three- dimensional CAD model, an assembling order and machining order setting part 26 which sets the assembling order and machining order of components according to the pieces of information from the data input part 25, a weld point setting parts 27 for the respective processes which sets weld points of the respective welding processes according to the pieces of information from the data input part 25, and a data output part 30 which outputs necessary documents according to the information from the assembling order and machining order setting part 26 and weld point setting part 27 for the respective processes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work process designing apparatus for designing a work process using a three-dimensional CAD model created by three-dimensional CAD when manufacturing a welded product.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for designing a working process using CAD data, for example, those disclosed in Japanese Patent Application Laid-Open Nos. Hei 3-60935 and Hei 5-2594 are known. Among these conventional examples, the former relates to a work process analysis / standard time setting device, and is configured so that these settings are performed according to the following procedure. (1) Using the parts hierarchical structure of the CAD data, the parts assembly order is determined based on work conditions and past actual data. (2) Further, a work process necessary for the worker to assemble parts is set for each assembling process by using a knowledge database in which the know-how of the work manager and the field worker is taken as a rule. (3) The work time is set by taking in the standard time estimation table as a calculation formula having parameters.

On the other hand, the latter conventional example relates to an automatic work knitting apparatus, and utilizes a know-how of a veteran who performs work knitting based on a predetermined flow chart for a product to meet various knitting conditions. The work is evenly distributed and the appropriate workers are assigned to each process.

[0004] However, in these conventional examples, welding line information (groove shape, groove shape parameter, welding line length, etc.).
However, these methods cannot be applied to the process design for the welded part because the method is not considered at all. Further, since the work process is set based only on the past performance data and the knowledge database, there is a problem that it is not possible to deal with a product having a new shape that cannot be handled by these data.

[0005] By the way, as a conventional system in which welding line information is considered, two-dimensional CAD data output from two-dimensional CAD data is used.
There is a system for manually performing various settings based on a dimensional drawing. Hereinafter, this conventional system will be described with reference to the flowchart shown in FIG.

B1: A part shape and a welding point are confirmed on a two-dimensional drawing 51 output from two-dimensional CAD data, and part information and welding line information are created. At the time of creating these pieces of information, the design department is requested to make a design change for a portion that is found to be a manufacturing problem in advance from the past experience 52. B2 to B3: A part assembly order and a processing order are set based on work conditions, past experience 52, and similar parts form (method) 53, and a parts configuration table 54 is created. Further, the welding position in each welding process is set, and a wire length weight table is created.

B4: The work process in each process is set with reference to the past experience 52 and the similar parts form 53, and the standard time for each work process is set from the standard time estimate material and the similar model time study result 55. . Thus, the process design document 56
Create B5: Set the number of facilities and the number of workers in each process, check the line balance, and create a man-hour estimate. B6: It is determined whether or not the result needs to be corrected, and if necessary, the set value set in the previous step B2 or B3 is corrected. If no correction is necessary, the series of processing ends.

[0008] All the processes in the steps B1 to B5 are all performed manually. Also, when the design of the work process as described above is completed, after trial production of the product based on the result,
Teaching of the welding robot and creation of work instructions are also performed manually.

[0009]

However, the conventional system shown in FIG. 3 has the following problems. (1) Since the process design is performed based on empirical rules, when an unexpected situation occurs, for example, when the target cost is not reached, the operating range of the robot is insufficient or interference occurs at the prototype stage after the process design, the process design is performed. And in the worst case, from the design.
This causes the development period to be extended. (2) It takes time because all processing is performed manually. In addition, although information to be considered or added in each operation is highly relevant, it is inefficient because it is a duplicate operation. (3) Data cannot be diverted or shared because data is exchanged using paper. Further, the obtained knowledge does not remain as data. (4) Since empirical rules are used, there is no reliability in accuracy, and results obtained for each process designer differ.

The present invention has been made in order to solve such a problem. By adding information relating to welding to a three-dimensional CAD model, high reliability and automation of a process design for a welded part are achieved. Reduce development time,
It is an object of the present invention to provide a work process designing apparatus capable of improving product quality and reducing manufacturing costs.

[0011]

Means for Solving the Problems and Action / Effect In order to achieve the above object, a work process designing apparatus according to the present invention, when manufacturing a required welding product, compares part information and welding line information of the product. From the three-dimensional CAD model
A work process design apparatus for automatically setting each work process including a welding process, comprising: a data input device for converting data from the three-dimensional CAD model into data; and a data input device based on the information from the data input device. An assembling order / machining order setting means for setting a part assembling order and a machining order; a welding point setting means for setting a welding point in each welding step based on each information from the data input means; Data output means for outputting a required form based on information from the order / working order setting means and the welding location setting means is provided.

According to the present invention, welding line information of a product, which is an important factor in process design, is considered, and the welding line information is stored in a knowledge database based on a three-dimensional CAD model to which the welding line information is added. According to the algorithm, the order of assembling and processing the parts and the welding location in each welding step are automatically set. For a product having a new shape that cannot be handled by the algorithm stored in the knowledge database, an automatic process design can be performed by registering a simulation result of the welding simulation device in the knowledge database. Therefore, it is possible to perform an accurate work process design, increase the processing speed, and avoid re-designing due to a failure in a prototype stage after the design. In addition to eliminating the process design based only on empirical rules, since the data is digitized and the information can be transmitted efficiently, the reliability of the process design can be increased, and the data can be shared and reused. As a result, the concurrentity of the work can be improved. Furthermore, there is an advantage that the process design data obtained by the present invention can also be used as data for creating work instructions and for offline teaching of a welding robot.

In the present invention, further, a work process / standard time setting means for setting a work process and a standard time in each process based on information from the assembling sequence / working sequence setting means and the welding point setting means, The work process / standard time setting means includes equipment / worker number setting means for setting the number of apparatuses and the number of workers with line balance based on the information from the standard time setting means. It is preferable that the form is output in consideration of information from the standard time setting means and the number of apparatuses / number of workers setting means. As a result, a series of process design processes including creation of a process design document and a form such as a man-hour estimate document are completely automated.

According to the present invention, there is further provided a welding simulation device for performing a welding simulation using the three-dimensional CAD model. The welding sequence obtained by the welding simulation device and the results of the examination of the welding location in each step are described in the data. It is good to take in via input means. By doing so, the three-dimensional CAD model created by the three-dimensional CAD and the equipment model created in advance,
Equipment examination, interference check,
A welding simulation such as a study of a welding location in each process can be performed to verify a location that can be a defect on the three-dimensional CAD model, and the defect can be fed back early. Therefore, unexpected trouble does not occur at the stage of product trial production after the process design, and the development period can be prevented from being extended.

According to the present invention, there is further provided a correction device capable of correcting, on a screen, each information set by the assembling sequence / machining sequence setting means, the welding location setting means and the work process / standard time setting means. Is preferred.

Further, it is preferable that a database is provided for storing information set in the past by each of the setting means and for storing information during or after processing.
By using the information stored in this database, it is possible to achieve more efficient and faster process design.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the work process designing apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram of a work process designing apparatus according to one embodiment of the present invention, and FIG. 2 is a flowchart showing work procedures of the work process designing device.

In the system of this embodiment, the three-dimensional C
A three-dimensional model creation device (three-dimensional CAD) 2 for creating a three-dimensional CAD model based on the AD model database 1
And a welding simulation device 4 that performs welding simulations such as equipment examination, interference check, assembling sequence and examination of welding locations in each process, using data created in advance and stored in the equipment model and robot model database 3.
And a welding robot off-line teaching device 5 for performing teaching based on the process design result output from the work process design device 8 to create a robot program, and a process instruction know-how to the process design result output from the work process design device 8. A work instruction creation device 7 that incorporates the contents of the work instruction from the database 6 and creates a work instruction is provided. These three-dimensional model creation device 2, welding simulation device 4, welding robot offline teaching device 5, and work instruction document are provided. The creation device 7 is connected to the work process design device 8. Here, the welding robot offline teaching device 5 shares the equipment model and the robot model database 3 with the welding simulation device 4.

The work process design device 8 includes a processing unit 9 for performing a process design, a storage unit 10 for storing information necessary for the process design process, and component information and welding lines from the three-dimensional model creation device 2. A data input device 11 for inputting information, an assembling order from the welding simulation device 4, and a study result of a welding location in each process into the processing unit 9, and an operator using the mouse 12 and the keyboard 13 to process the processing result. A correction device 14 for correcting on the screen, and a past performance data / knowledge database 15 for storing data set in the past or storing data being processed or processed
And the data sent from the processing unit 9 is printed as a form such as a parts configuration table and a process design table, and the data from the processing unit 9 is further transmitted to the welding robot offline teaching device 5.
Alternatively, it is constituted by a data output device 16 for outputting to the work instruction document creating device 7.

The storage unit 10 includes a work condition information storage unit 17 for storing work conditions, a part assembling order / machining order setting procedure 18 for storing a part assembling order / machining order setting algorithm, and Welding procedure setting procedure 19 for storing the welding procedure setting algorithm in each step, work procedure setting procedure 20 for each procedure storing the working procedure setting algorithm for each procedure, and standard time storing the standard time setting algorithm A setting procedure 21, a number-of-apparatuses / workers-number setting procedure 22 for storing the number of apparatuses and the number of workers setting algorithm, a parts information / welding line information storage unit 23 for storing parts information / welding line information, and data file management And a unit 24.

Further, the processing section 9 converts the component information and welding line information input from the data input device 11, the assembly order from the welding simulation device 4, and the results of the examination of the welding location in each step. Data input unit 25
A part information / welding line information storage unit 23, a work condition information storage unit 17, and a part assembling order / machining order setting procedure 18
The parts assembling order / machining order setting unit 26 for setting the parts assembling order / machining order based on each data from the parts information / welding line information storage unit 23, the work condition information storage unit 17, and each process Based on the data from the welding location setting procedure 19, a welding location setting unit 27 in each process for setting a welding location in each process, a component assembling order / machining sequence setting unit 26, and welding in each process Based on the results in the location setting unit 27 and the data from the work process setting procedure 20 and the standard time setting procedure 21 in each process, the work process and standard time in each process for setting the work process and the standard time in each process. Based on the time setting unit 28 and the results of the work process / standard time setting unit 28 in each step and the data from the number-of-devices / number-of-workers setting procedure 22, line-balanced equipment · And the device number, operator number setting unit 29 for setting the number of workers, each of these setting portions 26 and 27,
The data output unit 30 sends data to the data output device 16 in the format of a parts configuration table, a line length weight table, a process design document, and a process estimate document based on the processing results at 28 and 29.

In the system configured as described above, when the three-dimensional model creation device 2 creates a three-dimensional CAD model relating to a required welding product, the part information of the product and the information related to welding (welding information). Line information) is added. More specifically, each welding line is defined as a shape feature in CAD, and welding line information such as a groove shape, a groove shape parameter, and a welding line length is added as its additional information.

The work procedure of the work process design apparatus according to the present embodiment will be described below with reference to the flowchart shown in FIG.

As shown in the upper part of FIG. 2, a product having a new shape is formed by using a three-dimensional CAD model created by the three-dimensional model creating device 2 and an equipment model and a robot model created in advance. A welding simulation is performed by the welding simulation device 4, and equipment examination, interference check, assembling order, and examination of a welding location in each step are performed. In this way, we can verify the location of the problem,
Correction of a three-dimensional CAD model by feedback of a defect is performed early.

A1: Parts information from three-dimensional CAD model, welding line information 31, and welding simulation device 4
The data on the results of the examination of the welding sequence in each of the steps of assembling and the process are taken in. A2: Based on each data from the part information / welding line information storage unit 23, the work condition / past result data 32 and the knowledge database 33 (corresponding to the work condition information storage unit 17 and the past result data / knowledge database 15), The parts assembling order / machining order is automatically set by the parts assembling order / machining order setting unit 26 (creation of the parts configuration table 35).

A3: Parts information / welding line information storage unit 23,
Based on the work conditions and past data 32 and the data from the knowledge database 33, the welding location in each process is automatically set by the welding location setting unit 27 in each process (creation of wire length weight table). . A4: Based on the data obtained in steps A2 and A3 and the data from the knowledge database 33, the work process in each process is automatically set, and the standard time estimation table 3
4 is taken in as a calculation formula having parameters, and a standard time is set for each work process (creation of a process design document 36).

A5: The number of facilities and the number of workers in each process are set, and the line balance is confirmed (creation of man-hour estimate). A6: If the processing result needs correction, step A2
Of the parts assembling order / machining order or the welding location in each step in step A3. The processing result is also fed back to the welding simulation device 4. The work process and the standard time in step A4 can also be modified by the operator.

By incorporating the contents of the work instruction from the work instruction know-how database 6 into the process design result obtained in this way, a work instruction document can be created. Also,
A robot program can also be created by performing off-line teaching of the welding robot based on the result of the process design.

In this embodiment, a welding simulation device 4 and a welding robot offline teaching device 5
Are described as separate devices, but these devices can be replaced with one device capable of performing both the welding simulation and the welding robot offline teaching.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a work process design apparatus according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation procedure of the operation process design apparatus according to the embodiment;

FIG. 3 is a flowchart of a conventional system considering welding line information.

[Explanation of symbols]

Reference Signs List 1 3D CAD model database 2 3D model creation device (3D CAD) 3 Robot model database 4 Welding simulation device 5 Welding robot offline teaching device 6 Work instruction know-how database 7 Work instruction document creation device 8 Work process design device 9 Processing unit REFERENCE SIGNS LIST 10 storage unit 11 data input device 12 mouse 13 keyboard 14 correction device 15 result data / knowledge database 16 data output device 17 work condition information storage unit 18 part assembling order / machining order setting procedure 19 welding location setting procedure in each process 20 Procedure setting procedure for each process 21 Standard time setting procedure 22 Equipment number / operator number setting procedure 23 Parts information / welding line information storage section 24 Data file management section 25 Data input section (data input means) 26 Parts assembly order・ Processing order setting unit (part assembly order / processing order setting means) 27 Welding point setting unit in each process (welding point setting means) 28 Work process / standard time setting unit (work process / standard time setting) in each process Means) 29 Number of devices / number of workers setting unit (number of devices / number of workers setting unit) 30 Data output unit (data output unit)

Claims (5)

[Claims] 1. A work process designing apparatus for automatically setting each work process including a welding process from a three-dimensional CAD model having component information and welding line information of a required weld product when manufacturing the product. A data input unit for converting each information from the three-dimensional CAD model into data; and an assembling sequence and a processing sequence for setting the assembling sequence and the processing sequence of the parts based on the respective information from the data input device. Setting means, a welding point setting means for setting a welding point in each welding step based on each information from the data input means, and a required setting based on information from the assembling order / working order setting means and the welding point setting means. A work process design apparatus comprising a data output means for outputting a form. 2. A work process / standard time setting means for setting a work process and a standard time in each process based on information from the assembling sequence / working sequence setting means and welding location setting means, The number of devices and the number of workers that set the number of devices and the number of workers with line balance based on information from the standard time setting means; and the number of workers setting means.
2. The work process designing apparatus according to claim 1, wherein the form is output in consideration of information from a standard time setting unit and a device number / operator number setting unit. 3. A welding simulation device for performing a welding simulation using the three-dimensional CAD model, wherein the data input means obtains an assembling order and a result of a study on a welding location in each step obtained by the welding simulation device. The work process design apparatus according to claim 1, wherein the work process design apparatus is taken in via a computer. 4. A correction device capable of correcting each information set by the assembling sequence / machining sequence setting means, welding location setting means and work process / standard time setting means on a screen. 4. The work process design apparatus according to 2 or 3. 5. A database for storing information that has been set in the past by each of said setting means, and for storing information during or after processing.
The work process design apparatus according to any one of the above.