JPH09160935A - Load-stress/life analyzing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically calculate the stress/life of respective mechanical parts based upon a model having a driving system and to improve the efficiency of load-stress/life analyzing work and the reliability of accuracy by providing a load-stress/life analyzing device with a stress/life calculating processing part. SOLUTION: The analyzing device is provided with the stress/life calculating processing part 14 for executing calculation related to the stress/life of mechanical parts. The shape data and position data of mechanical parts for calculating stress/life are extracted from a shape storing part 9 at first. Then, load data are extracted from a load data storing part 15 for recording the frictional load and load of respective parts which are calculated by a load calculating processing part 7. Then, mutual force for calculating stress/life is calculated by the use of the extracted data and stress/life calculating processing utilizing the material dynamics is executed. The calculated result is scored in a stress/life data storing part 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load-stress / life analysis device for designing an apparatus having a medium transfer mechanism such as a financial automatic machine and a printer, and a drive system of a mechatronics product, utilizing a computer. It is a thing.

[0002]

2. Description of the Related Art Conventionally, the load torque applied to parts and mutual load between parts have been used to analyze the stress and life generated in parts of a mechanical unit (shaft, belt, gear, pulley, bearing, etc.) that has a drive. Was calculated by hand for stress / life analysis of parts. Further, a load analysis device as shown in FIG. 15 is used to calculate the load applied to the component and manually calculate the stress / life of the component.

The load analysis device of FIG. 15 includes an input device 1 for inputting shape data of mechanical parts and connection attributes / load attributes, and a processing device 2 for editing / calculating the input data.
It is composed of a storage device 3 for storing data necessary for this arithmetic processing and a display device 4 for displaying the shape input by the input device 1 and the analysis result by the processing device 2.

The processing device 2 has a shape input processing section 5 for converting a shape based on the parameter data of the mechanical part input from the input apparatus 1, and the shape data of the shape input processing section 5 and the storage apparatus 3 after the shape is already input. Related to the load such as the moment of inertia and friction load by using the data of the connection search processing unit 6 that searches for the connection based on the positional relationship with the existing mechanical parts, and the shape input processing unit 5 and the connection search processing unit 6. A load calculation processing unit 7 for performing calculation, and a result processing unit 8 for processing the result of the load calculation processing unit 7 in the form of a graph and for making a table of the connection relationship of mechanical parts by the connection search processing unit 6. Composed.

The storage device 3 also stores a shape data storage unit 9 for storing the data relating to the member input by the input device 1, and material property data for storing the physical property data of various materials used for the member. The storage unit 10 and a frictional physical property data storage unit 11 for storing data regarding friction between various materials are configured.

[0006]

However, there have been the following problems in performing stress and life analysis of members. There was a possibility that a calculation error might occur in calculating the load torque and the mutual load between members by manual calculation.
Further, even if the stress / life analysis is performed using the load analysis device, the load calculation needs to be performed manually, which may cause a calculation error. At the same time, it was time-consuming and required much time for analysis work.

[0007]

The present invention provides an input device that receives input data, a processing device that edits / calculates the input data, a storage device that stores data necessary for the processing device, and information. The processing device comprises a display device for displaying, a processing device, a shape input processing unit that performs shape conversion based on input data regarding each part of the analysis target device, a connection search processing unit that checks a connection relationship between each part, and a drive system The load calculation unit has a load calculation processing unit that performs load-related calculations and a stress / life calculation processing unit that calculates stress / life of components. It is characterized by having a storage unit and a stress / lifetime data storage unit for storing the processing result of the stress / lifetime calculation processing unit, and analyzing the load, stress and life of the analysis symmetrical device.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 is a configuration diagram of a load-stress / life analysis apparatus according to the present embodiment. In the figure, reference numeral 1 denotes an input device for inputting shape data of mechanical parts, connection attributes, and load attributes. Reference numeral 12 denotes a processing device, which edits / calculates the input data. Reference numeral 13 denotes a storage device, which is used for storing data necessary for the processing device 12. A display device 4 displays the shape input by the input device 1 and the analysis result by the processing device 12.

As described above, this device is composed of the input device 1, the processing device 12, the storage device 13 and the display device 4. The components of the processing device 12 will be described in detail. A shape input processing unit 5 performs shape conversion based on the parameter data of the mechanical parts input from the input device 1. Reference numeral 6 denotes a connection search processing unit, which is the shape input processing unit 5
Based on the positional relationship between the shape data and the mechanical parts that have already been input in the shape and are present in the storage device 13, it is searched whether or not they are connected. Reference numeral 7 denotes a load calculation processing unit, which uses the data of the shape input processing unit 5 and the connection search processing unit 6 to perform load-related calculations such as moment of inertia and friction load.

Reference numeral 14 denotes a stress / life calculation processing unit, which is used to calculate the stress / life of mechanical parts. The processing device 12 of the present embodiment is characterized by having the stress / life calculation processing unit 14. A result processing unit 8 processes the results of the load calculation processing unit 7, the stress life calculation processing unit 14, and the connection search processing unit 6 in the form of a table or a graph, and displays them on the display device 4.

Next, the components of the storage device 13 will be described in detail. Reference numeral 9 denotes a shape data storage unit for storing data regarding the member input by the input device 1. A material physical property data storage unit 10 stores physical property data of various materials used for members. Reference numeral 11 denotes a frictional physical property data storage unit, which stores data regarding friction between various materials.

A load load data storage unit 15 stores the friction load and load load of each component of the processing of the load calculation processing unit 7. A stress / life data storage unit 16 stores the processing result of the stress / life calculation processing unit 14. The storage device 13 of the present embodiment is characterized in that the load / load data storage unit 15 and the stress / life data storage unit 16 are provided.

FIG. 2 is a flow chart of the stress / life calculation processing of the present embodiment, and the flow of the processing of the stress / life calculation processing unit 14 will be described with reference to this figure. The process of extracting the shape data and the position data of the mechanical parts for which the stress / life is calculated from the shape data storage unit 9 (Sa1), and then the friction load and the applied load of each part calculated by the load calculation processing unit 7 are performed. Is performed to extract the load weight data from the load weight data storage unit 15 that stores (Sa2).

Subsequently, the mutual force for stress / life calculation is calculated using the data extracted in the processes of Sa1 and Sa2, and the stress / life calculation process using material mechanics is performed (Sa3). Then, the calculation result is stored in the stress / life data storage unit 16 (Sa4). FIG. 3 is an explanatory diagram showing an example of the analysis model of this embodiment. FIG.
The shape input processing unit 5, the connection search processing unit 6, and the load calculation processing unit 7 are assumed to input the analysis model of FIG. 3 or perform load calculation (the contents of this operation are disclosed in, for example, Japanese Patent Laid-Open No. 4-174080). In the following, particularly, the operations of the stress / life calculation processing unit 14, the load data storage unit 15, and the stress life data storage unit 16 will be mainly described in more detail.

The model of FIG. 3 is composed of four shaft parts F410 to F413, five pulley parts F420 to F424, two belt parts F430 and F431, and two bearing parts F440 and F441. The arrows of F50 to F54 are
The load applied to each shaft is shown. here,
A case of performing stress / life calculation on the shaft of F410 will be described as an example.

First, the shaft shape and position data of F410 are extracted from the shape data storage unit 9. As the shape parameter data at that time, for example, data having the configuration shown in FIG. 4 is extracted. FIG. 4 is an explanatory view showing an example of the shaft shape parameter of the present embodiment. The shape parameter includes the shaft total length (L1) P50 and the stepped position (L).
2, L3) P51, P52 and E type snap ring position (L4)
P53, E type snap ring width (L5) P54, hole position (L
6) P55, hole diameter (R1) P56, fixed position (L
7) There is P57 etc.

In the case of the shaft F410 of FIG. 3, a process of extracting the shape parameter data corresponding to the total shaft length (L1) P50 and the fixed position (L7) P57 from the shape data storage unit 9 is performed (see Sa1 of FIG. 2). Correspondence). Here, the fixed position is the connecting portion of the bearings F440 and F441. Next, a process of extracting the load applied to the shaft F410 from the load data storage unit 15 is performed (S in FIG. 2).
corresponding to a2). Here, two load loads, F50 and F51, and direction data are extracted.

From the above data, stress / life calculation processing of stress, reaction force, moment and displacement at the fixed position, load position, etc. of the shaft F410 is performed (corresponding to Sa3 in FIG. 2). The calculation result is stored in the stress / life data storage unit 16 (corresponding to Sa4 in FIG. 2), and then the next part is processed. FIG. 5 is an explanatory diagram showing an example of the numerical result table of the present embodiment. An example of the numerical result table displayed on the display device 4 after the calculation result of the shaft stress / life calculation is processed by the result processing unit 8 is shown. Shows.

In the above description, the shaft has been described as an example, but the present invention is not limited to this, and by using the apparatus of the present embodiment, stress calculation of a screw using material mechanics, a Lewis equation or a Hertzian surface is used. It is possible to calculate gear stress using a pressure formula, life calculation using a general bearing life formula, belt tension, and the like. Further, CAD data may be used instead of the operator inputting the model data.

As described above, by using the device according to the present embodiment, the stress of each mechanical component is
Since the life can be calculated, not only the efficiency of load-stress / life analysis work is improved, but also the accuracy and reliability are improved. Second Embodiment FIG. 6 is a structural diagram of a load-stress / life analysis apparatus showing the present embodiment. The present embodiment is characterized in that, in the configuration of the first embodiment, a conversion processing unit, a component discrimination data storage unit, and a drawing data file described later are provided.

FIG. 7 is an explanatory view showing an example of a mechanical design drawing. When designing the mechanism, the front view as shown in FIG.
The mechanical parts are laid out and designed according to a three-view drawing consisting of a side view and a plan view. However, in the device of the present embodiment, instead of inputting the analysis model as shown in FIG. Utilizing this, load-stress / lifetime analysis is performed. As shown in FIG. 6, this device is for inputting the input data 1 for inputting the shape data and the connection attributes / load attributes of the mechanical parts of the three views as shown in FIG. 7, and for editing / calculating the input data. Processing device 17 and the above-mentioned input data and processing device 1
7, a storage device 18 for storing necessary data, a display device 4 for displaying the shape input by the input device 1 and an analysis result by the processing device 17, and a mechanism data already input by CAD. Graphic data file device 1
9.

The processing device 17 of the present embodiment includes a shape input processing unit 5 for converting the shape coordinates of the mechanical parts input from the input device and reading the coordinates from the graphic data file device 19, and the input shape data. Alternatively, a conversion processing unit 20 for converting the shape data already existing in the storage device 18 for load-stress / life analysis, and the conversion processing unit 2.
A moment of inertia using a connection search processing unit 6 for searching whether or not the parts are connected based on the data of the mechanical parts converted by 0, and the data of the conversion processing unit 20 and the connection search processing unit 6 Load calculation processing unit 7 for calculation of load such as friction load, stress / life calculation processing unit 14 for calculation of stress / life of mechanical parts, and processing and connection of analysis results in graph form The search processing unit 6 is composed of a result processing unit 8 for making a connection relationship of mechanical parts into a table.

The conversion processing unit 20 defines a condition (projection surface or reference point) for extracting a component of a drive system, and a component condition setting processing unit 21 for converting components of the three-view drawing into individual components. It is composed of a group information processing unit 22 for determining group information for decomposition, and a three-dimensional coordinate conversion processing unit 23 for converting three-dimensional drawing components into three-dimensional coordinates and characteristic parameters. .

Further, the storage device 18 of the present embodiment stores the shape data storage unit 9 for storing the data regarding the member input from the input device 1, and the physical property data of various materials used for the member. Physical property data storage unit 10 for storing, friction physical property data storage unit 11 for storing data on friction between various materials, and load load for storing friction load and load load of each component in the load calculation processing unit 7. A data storage unit 15, a stress / lifetime data storage unit 16 for storing the calculation result of the stress / lifetime calculation processing unit 14, and a component determination for determining what components of the three views are components of a drive system. And a data storage unit 24.

Incidentally, for example, Japanese Patent Laid-Open No. 4-174080 is used for the load calculation mentioned here, and material mechanics is used for the stress / life calculation. The operation of the present embodiment will be described separately as follows: -Analysis model creation based on three-view drawing data; -Part type determination when creating an analysis model-Extraction of a three-dimensional model when creating an analysis model.

[Creation of analysis model based on three-view drawing data]
FIG. 8 is a flowchart of the analysis model creation processing of the three-view drawing data, and the procedure for creating the analysis model based on the three-view drawing data will be described with reference to this drawing. As a process for creating an analysis model, data is read from the drawing data file device 19 in which the already input mechanism data is stored, or a process for displaying the shape on the display device by the input device 1 is performed (Sb10).

As preprocessing for creating an analytical model, processing for extracting the projection plane and the reference point or designating the projection plane and the reference point from the input device 1 is performed (Sb20). FIG. 9 is an explanatory diagram showing an example of the projection surface / reference point processing, which shows the projection surface and the reference points extracted in the processing (Sb20). The projection plane T1 is a front view, the projection plane T2 is a plan view, and the projection plane T3 is a right side view. Further, the reference point K1 represents the X and Y reference points of the projection surface T1, the reference point K2 represents the X and Z reference points of the projection surface T2, and the reference point K3 represents the Y and Z reference points of the projection surface T3.

Next, the mechanical parts are extracted (Sb3).
0). Here, the existence check of the shape group information is performed to determine whether there is a part to be extracted. If there is no group information, the analysis model creation process ends. If there is group information, the following process Sb40 is performed. Here, the group information is used to handle a plurality of shape elements (straight lines, circles, arcs, etc.) as one group, and the CAD function is based on a general function.

Subsequently, processing for determining the type of mechanical part (shaft, gear, roller, etc.) is performed from the name attribute of group information (Sb40). When the mechanical parts can be determined, processing (Sb61 to Sb67) is performed for each type. If the type of the mechanical component cannot be determined, after performing the process (Sb50) of designating the shape element and the component type from the display component displayed on the display device 4 by the input device 1, the process (Sb61 to Sb67) is performed. To do.

The processes of Sb61 to Sb67 are processes for extracting the shape parameter for each part type. After extracting the parameters, three-dimensional conversion processing is performed (Sb7
0). This three-dimensional conversion processing is performed by performing three-dimensional conversion from the positional relationship between the projection planes, which is a general method.

The above processing is performed to create a model for analysis. In this way, an analysis model can be automatically created and load-stress / life calculation can be performed simply by creating a design drawing of a mechanical device having a drive system and defining the model. It is not necessary to separately create a three-dimensional model for analysis, and the workability of analysis is improved.

[Part Type Judgment when Creating Analysis Model] Here, the operation of the part type judgment process when creating an analysis model will be described. The part type discrimination process is
Although it is performed by referring to the group information, the group information includes the manufacturing part number Z1 as shown in FIG.
There are two pieces of attribute information such as the name Z2. Using this information, the group information processing unit 22 of FIG. 6 refers to the data of the component determination data storage unit 24 to determine the component type.

FIG. 11 is a structural diagram of the component discriminating data storage section. This component discriminating data is composed of a component type A1, an identification number A3 and a parameter A4, and data having the identification number A3 and the parameter A4 as one record. The number of data A2 defines the number. The part type is
The system defines the bearing as 1 and the shaft as 2. As for the identification number, 100 is the parameterized data of the manufacturing part number Z1 and 200 is the name Z2.
This is data for referring to the data of.

FIG. 12 is an explanatory diagram showing an example of the component discrimination data, and the component discrimination data will be described more specifically taking the case of a bearing as an example. A4 in which the data of the manufacturing part number Z1 is parameterized is B%-%, which means that% here is the parameter. If the manufacturing part number is B10-5, the parameters 10 and 5 are extracted as the bearing attribute information.

Even if the name is bearing, it can be determined as a component of component type 1 by referring to the identification number 200. In this way, since the part type can be automatically determined using the group information as a key, the workability of creating the analysis model is improved. [Extraction of 3D model when creating analysis model]
The operation of the three-dimensional model extraction process when creating the analysis model will be described.

The three-dimensional extraction is performed by converting the positional relationship between the projection planes, which is a general method, into the coordinates of the three-dimensional data x, y, z, which is a component of the drive system. Focusing on the fact that the shaft, gear, roller, pulley, and bearing are cylindrical, we decided to have only one three-dimensional coordinate, and we decided to have the shape characteristics as data in the form of parameters. Sb61 to Sb67 and Sb in FIG.
By the processing of 70, the following three-dimensional coordinates, direction, and characteristic parameter extraction are performed.

FIG. 13 is an explanatory diagram showing an example of the characteristic parameters of the shaft shape according to the present embodiment. As the extracting operation, the three-dimensional coordinate of the shaft is extracted by extracting the data of the reference point P70 and the thickness direction H1, and further extracting the following characteristic parameter. Total shaft length (L1) P50, shaft diameter (D1) P60, stepped position (L2, L3) P51,
P52, stepped diameter (D2) P61, E-shaped retaining ring position (L4) P53, E-shaped retaining ring width (L5) P54, E
Mold retaining ring diameter (D3) P62 and hole position (L6) P55
And the characteristic parameters such as the hole diameter (R1) P56 and the fixed position (L7) P57. The other parts are also extracted in the same manner.

Further, the belt of the driving component is regarded as a plate having a constant thickness instead of a cylindrical shape, and the characteristic parameters as shown in FIG. 14 are extracted. A belt pitch shape (both ends of a straight line, a center point of an arc, a start point, an end point) such as B1 indicated by a broken line as three-dimensional coordinates and a belt width direction H1.
Is extracted. Belt thickness B as a characteristic parameter
2. Extract B3. There are two types of belts, a flat belt and a timing belt. Furthermore, some timing belts have different thickness and tooth pitch depending on the manufacturer. The belt type can also be determined by the procedure shown in the above-described operation example (component type determination when creating an analysis model). Further, in the case of the flat belt, there is a relation of B2 = B3, and in the case of the timing belt, it is determined by referring to the thickness information of the timing belt from the material physical property data storage unit 10.

As described above, since the analysis model is defined in the form of the characteristic parameters and the reference points of the mechanical parts, the calculation process can be completed in a shorter time than the load-stress / life calculation from the shape coordinates.

[0040]

As described in detail above, by providing the stress / life calculation processing section, the stress / life of each mechanical component can be automatically calculated based on the model having the drive system. Therefore, there is an effect that the efficiency of the load-stress / lifetime analysis work is improved and the accuracy and reliability are improved.

Further, since the conversion processing section is provided, it becomes possible to prepare an analysis model based on the CAD data of the three views and perform load-stress / life analysis, which further improves the working efficiency. .

[Brief description of the drawings]

FIG. 1 is a structural diagram of a load-stress / life analysis device showing a first embodiment.

FIG. 2 is a flowchart of stress / life calculation processing according to the first embodiment.

FIG. 3 is an explanatory diagram showing an example of an analysis model according to the first embodiment.

FIG. 4 is an explanatory diagram showing an example of parameters of a shaft shape according to the first embodiment.

FIG. 5 is an explanatory diagram showing an example of a numerical result table according to the first embodiment.

FIG. 6 is a structural diagram of a load-stress / life analysis device showing a second embodiment.

FIG. 7 is an explanatory view showing an example of a mechanism design drawing.

FIG. 8 is a flowchart of analysis model creation processing of three-view drawing data.

FIG. 9 is an explanatory diagram showing an example of projection plane / reference point processing.

FIG. 10 is an explanatory diagram showing an example of group information attributes.

FIG. 11 is a structural diagram of a component discrimination data storage unit.

FIG. 12 is an explanatory diagram showing an example of part determination data.

FIG. 13 is an explanatory diagram showing an example of characteristic parameters of the shaft shape according to the second embodiment.

FIG. 14 is an explanatory diagram showing an example of parameters of a belt shape.

FIG. 15 is a structural diagram showing a conventional load analysis device.

[Explanation of symbols]

 1 Input Device 4 Display Device 5 Shape Input Processing Unit 6 Connection Search Processing Unit 7 Load Calculation Processing Unit 12 Processing Device 13 Storage Device 14 Stress / Life Calculation Processing Unit 15 Load Load Data Storage Unit 16 Stress / Life Data Storage Unit 17 Processing Device 18 storage device 20 conversion processing unit 21 component condition setting processing unit 22 group information processing unit 23 three-dimensional coordinate conversion processing unit 24 component determination data storage unit

Claims (4)

[Claims] 1. An input device that receives input data, a processing device that edits / calculates the input data, a storage device that stores data necessary for the processing of the processing device, and a display device that displays information. The processing device includes a shape input processing unit that performs shape conversion based on input data regarding each component of the analysis target device, a connection search processing unit that examines a connection relationship between each component, and a calculation regarding a load by a drive system. And a stress / life calculation processing unit that calculates stress / life of parts, wherein the storage device stores load information by the processing of the load calculation processing unit. And a stress / lifetime data storage unit that stores the processing result of the stress / lifetime calculation processing unit, and analyzes the load, stress, and life of the analysis symmetrical device. Load-stress / life analysis device. 2. The processing device according to claim 1, wherein the processing device extracts a component condition setting processing unit that extracts a projection surface and a reference point, a group information processing unit that determines the type of each component, and a feature of the component shape. A conversion processing unit including a three-dimensional coordinate conversion processing unit is provided, a storage device is provided with a component determination data storage unit for determining the type of the component, and an analysis model is created from the three-view drawing data and processed. Load-stress / life analysis device. 3. The method according to claim 2, wherein when the three-view drawing data is decomposed into individual parts, the part type is determined using the manufacturing part number or name of the group information which is the attribute information of the data. Load-stress / life analysis device. 4. The load-stress / life analysis apparatus according to claim 2 or 3, wherein when the three-view drawing data is used as three-dimensional data, a part is defined by reference points and characteristic parameters.