Fixture design method and device based on three-dimensional technology

Abstract

The invention relates to a clamp design method and device based on a three-dimensional technology. The method comprises the following steps: generating and storing design data of a target flexible clamp through a design system; the method comprises the following steps: determining an insertion point position in a target space, and combining design data to generate a flexible clamp set model; according to the characteristics of the workpiece model to be applied by the target flexible fixture and the flexible fixture set model, performing tangent point calculation to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model; determining whether to simulate the flexible clamp according to the displacement value; and checking the target flexible clamp according to a simulation result, and generating a target flexible clamp set model. The method has the advantages that the operation is convenient, and the model generation efficiency of the design system is improved.

Description

Technical Field

[0001] The invention relates to the field of computer technology application, and in particular to a fixture design method and device based on three-dimensional technology. Background Art

[0002] In the field of equipment manufacturing, the design process of equipment, parts or components is usually based on the collection of knowledge related to fixture design, which is presented in the form of content or forms as a knowledge retrieval module composed of concept introduction, content description, documents, etc.; according to the type of machine tool fixture, the modeling of relative components is completed, and the fixture instance retrieval module is designed based on this; according to the characteristics of the structural module of the machine tool fixture, the design modules of each component of the fixture are designed separately; the design modules of each component of the fixture are packaged together with the fixture design process to form modules including fixture assembly design, fixture improvement or editing, fixture acquisition or model generation, etc.

[0003] In the prior art, a knowledge base is created, and users can search for knowledge points, documents, etc. through keywords. However, the search results are for reference only and have no direct relationship with the design of the fixture. In addition, as a software user, the maintenance workload of the knowledge base is very large. The library module and the design module are integrated together, which is large and complex for design software. In addition, in the rapid design module, there are interactive interfaces designed for multiple component models. For users, the interaction seems too complicated. In addition, for non-standard parts, there are many types and complex shapes, and it is difficult to achieve full parametric modeling for such parts. In the end, there is no intuitive verification feedback mechanism or tool for the designer's design results.

[0004] At present, in the process of fixture design with the existing technology, there are problems such as large overall volume, complex operation and inability to design non-standard parts, and no effective solution has been proposed yet. Summary of the invention

[0005] The purpose of the present invention is to provide a fixture design method and device based on three-dimensional technology to address the deficiencies in the prior art, so as to solve the technical problems in the prior art of fixture design, such as large overall volume, complex operation and inability to involve the design of non-standard parts.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a fixture design method based on three-dimensional technology, comprising: generating and saving design data of a target flexible fixture through a design system; generating a flexible fixture set model by determining an insertion point position in a target space and combining the design data; calculating a tangent point based on the characteristics of a workpiece model used by the target flexible fixture and the flexible fixture set model to obtain a displacement value of the tangent point on the workpiece model and the flexible fixture set model; determining whether to simulate the flexible fixture based on the displacement value; checking the target flexible fixture based on the simulation result, and generating a target flexible fixture set model.

[0008] Optionally, before generating and saving the design data of the target flexible fixture through the design system, the method also includes: creating a three-dimensional model and database of the structural parts of the flexible fixture; setting the storage and warehousing method of the structural parts in the flexible fixture according to the design characteristics of the flexible fixture; and importing the workpiece model corresponding to the target flexible fixture into the design system.

[0009] Further, optionally, creating a three-dimensional model of the structural parts of the flexible clamp includes: constructing a parametric model based on CAD software through parametric modeling technology to obtain a three-dimensional model of the flexible clamp structural parts, the three-dimensional model including: a basic rectangular parametric model of the rectangular feature structural parts, and a basic cylindrical parametric model with cylindrical features; creating a database includes: using the product model of the flexible clamp as the key field, associating the entered series data, and saving it in the form of a database file, wherein the series data includes a geometric information series, an assembly information series, and a calculation information series of each structural part.

[0010] Optionally, the storage and retrieval methods of the structural parts in the flexible clamp are set according to the design characteristics of the flexible clamp, including: when the storage and retrieval methods of the structural parts include: a structural part design storage method and a structural part data export and import method, the structural part design storage method includes: designing an interactive panel according to the characteristic parameters of the structural parts of the shell and the telescopic device, so that the user can complete the design of the structural parts by entering the design values ​​through the interactive panel; storing the design values ​​entered by the interactive panel into the database to complete the storage; wherein the structural parts after storage are used for selection in the design stage; the method of exporting and importing the structural part data includes: designing an interactive panel including a structure tree and a filtering function according to the type of structural parts, so that the user can select the type and model of the structural parts to be exported through the interactive panel; according to the type and model of the structural parts selected in the interactive panel, filtering the corresponding data from the database and writing it into a file of a specified format, and when the user uses the export function in the interactive panel, saving the file in a specified format to a specified location; through the design import function, when the user opens a file of a specified format through the design import function, the data in the file is parsed and added to the existing files in the database to complete the import.

[0011] Optionally, generating and saving the design data of the target flexible fixture through the design system includes: selecting the model and assembly information of the target flexible fixture from the interactive interface of the design system; obtaining parameter values ​​from the database in the design system according to the model; determining the parameter values ​​and assembly information as design data and saving them.

[0012] Further, optionally, obtaining parameter values ​​from a database in the design system according to the model includes: when there is no parameter value corresponding to the model in the database, designing a structural component design corresponding to the model in the database, and inputting the structural component design into the database.

[0013] Optionally, the flexible fixture set model is generated by determining the insertion point position in the target space and combining the design data, including: generating a flexible fixture model based on the three-dimensional model of the flexible fixture structure in the parameter value-driven design system; generating a primary flexible fixture set model based on assembly information and the flexible fixture model; determining the insertion point in the target space based on the workpiece position of the target flexible fixture; and placing the primary flexible fixture set model based on the insertion point to obtain the flexible fixture set model.

[0014] Optionally, according to the characteristics of the workpiece model applied by the target flexible fixture and the flexible fixture set model, the tangent point calculation is performed to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model, including: step a, obtaining the cross-sectional position and sampling point value range of the telescopic device according to the characteristics of the telescopic device in the flexible fixture set model; step b, creating auxiliary line segments along the application conditions according to the sampling points in the sampling point range; step c, generating at least two intersection points according to the auxiliary line segments and the workpiece model and the flexible fixture set model; wherein the workpiece model is the workpiece model of the telescopic device; step d, generating at least two intersection points according to the at least two intersection points. The normal vector of the point is used to calculate the angle between the normal vectors of at least two intersection points on each auxiliary line segment; step e, selecting the minimum angle from the angles of the normal vectors of at least two intersection points, and determining the auxiliary line segment and the sampling point where the minimum angle is located; step f, reconstructing the square to create the sampling point based on the sampling point as the center point; step g, repeating steps a to f until the angle is approximately 0, and determining the point corresponding to the angle as the tangent point; step h, calculating according to the position distance of the tangent point on the workpiece model and the flexible fixture set model, and obtaining the displacement value of the tangent point on the workpiece model and the flexible fixture set model.

[0015] Optionally, determining whether to simulate the flexible fixture based on the displacement value includes: obtaining a flexible fixture set model; determining through a design system whether the flexible fixture set model calculates the displacement value; when the judgment result is yes, moving the flexible fixture set model for simulation based on the calculated displacement value to obtain a simulated flexible fixture set model; and determining through the design system whether to save the simulated state of the flexible fixture set model based on control instructions fed back by the user.

[0016] Optionally, the target flexible fixture is checked based on the simulation results, and the target flexible fixture set model is generated, including: obtaining the stroke threshold of the flexible fixture set model; comparing the stroke threshold with the displacement value, and adjusting the simulated flexible fixture set model according to the comparison result; obtaining the model of the target flexible fixture and the series data corresponding to the model through user re-selection; generating the target flexible fixture set model based on the re-selected model and series data, and saving each series data of the target flexible fixture set model in a specified format to generate a report file.

[0017] The present invention provides a fixture design device based on three-dimensional technology, comprising: a data generation and storage module, which is used to generate and store the design data of a target flexible fixture through a design system; a model generation module, which is used to generate a flexible fixture set model by determining the insertion point position in the target space and combining the design data; a calculation module, which is used to calculate the tangent point based on the characteristics of a workpiece model used by the target flexible fixture and the flexible fixture set model, and obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model; a simulation module, which is used to determine whether to simulate the flexible fixture based on the displacement value; and a model editing module, which is used to check the target flexible fixture based on the simulation result and generate the target flexible fixture set model.

[0018] The present invention adopts the above technical scheme, generates and saves the design data of the target flexible fixture through the design system; generates a flexible fixture set model by determining the insertion point position in the target space and combining it with the design data; calculates the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model, and obtains the displacement value of the tangent point on the workpiece model and the flexible fixture set model; determines whether to simulate the flexible fixture based on the displacement value; checks the target flexible fixture based on the simulation results, and generates the target flexible fixture set model. Compared with the prior art, the present invention has the following technical effects: easy operation and improved model generation efficiency of the design system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic flow chart of a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0020] Figure 2 It is a flow chart of the steps of preparing models and data of various structural parts of a flexible fixture in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of database fields in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0022] Figure 4It is a schematic diagram of parameters and geometrical appearance of a basic parametric three-dimensional model in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0023] Figure 5a is a schematic diagram of an interactive panel for querying and designing a structural part in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0024] Figure 5b is a schematic diagram of another interactive panel for querying and designing structural parts in another fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of measured data in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0026] Figure 7 is a schematic diagram of known quantities and unknown quantities in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0027] Figure 8 It is a schematic diagram of the process of generating a flexible fixture set model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0028] Figure 9a is a schematic diagram of a flexible fixture design interaction panel in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0029] Figure 9b is a schematic diagram of a flexible fixture design interaction panel in another fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0030] Fig.10 It is a schematic flow chart of a simulation calculation link of a flexible fixture in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0031] Fig.11 It is a schematic diagram of an interactive interface of a simulation calculation link of a flexible fixture in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0032] Fig.12 It is a flow chart of a fixture model simulation step in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0033] Fig.13 It is a schematic diagram of an interactive panel of a fixture model simulation link in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0034] Fig.14It is a flow chart of checking and adjusting the fixture components through simulation values ​​in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0035] Fig.15 This is a schematic flow chart of a step of outputting a product in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0036] Fig.16 It is a schematic diagram of an interactive interface for outputting a product in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0037] Fig.17 is a schematic diagram of a workpiece model importing system in a fixture design method based on three-dimensional technology according to a first embodiment of the present invention;

[0038] Fig.18 is a schematic diagram of a workpiece model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0039] Fig.19 is a schematic diagram of a flexible fixture design in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0040] Fig. 20 is a schematic diagram of a query interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0041] Fig.21 It is a schematic diagram of an interactive interface of a theoretical data input design mode in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0042] Fig. 22 It is an interactive interface for inputting a design mode of measured data in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0043] Fig.23 is a schematic diagram of the selection of structural parts in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention;

[0044] Fig.24 is a schematic diagram of a flexible fixture set model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0045] Fig.25 is a schematic diagram of placing a flexible fixture set model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0046] Fig.26 is a schematic diagram of a calculation interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0047] Fig. 27 is a schematic diagram of a model state after calculation is completed in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0048] Fig.28 is a schematic diagram of determining a simulation object interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0049] Fig.29 is a schematic diagram of a model state of a simulation result in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0050] Fig.30 is a schematic diagram of a position adjustment operation in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0051] Fig.31 is a schematic diagram of a saving interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0052] Fig.32 is a schematic diagram of a model after the position state is saved in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0053] Fig.33 is a schematic diagram of an interface for exporting simulation calculation values ​​in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0054] Fig.34 is a schematic diagram of reporting details in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0055] Fig.35 4 is a schematic diagram of a fixture design device based on three-dimensional technology according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0057] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0058] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0059] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" / "several" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0060] Example 1

[0061] An exemplary embodiment of the present invention is as follows Figure 1 As shown, Figure 11 is a flow chart of a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention. The fixture design method based on three-dimensional technology provided in the embodiment of the present application includes:

[0062] Step S102, generating and saving design data of a target flexible fixture through a design system;

[0063] Optionally, before generating and saving the design data of the target flexible fixture through the design system in step S102, the fixture design method based on three-dimensional technology provided in the embodiment of the present application also includes: creating a three-dimensional model and database of the structural parts of the flexible fixture; setting the storage and warehousing method of the structural parts in the flexible fixture according to the design characteristics of the flexible fixture; and importing the workpiece model corresponding to the target flexible fixture into the design system.

[0064] Further, optionally, creating a three-dimensional model of the structural parts of the flexible clamp includes: constructing a parametric model based on CAD software through parametric modeling technology to obtain a three-dimensional model of the flexible clamp structural parts, the three-dimensional model including: a basic rectangular parametric model of the rectangular feature structural parts, and a basic cylindrical parametric model with cylindrical features; creating a database includes: using the product model of the flexible clamp as the key field, associating the entered series data, and saving it in the form of a database file, wherein the series data includes a geometric information series, an assembly information series, and a calculation information series of each structural part.

[0065] Specifically, the fixture design method based on three-dimensional technology provided in the embodiment of the present application includes two parts: a first part: configuring the design system; and a second part: designing a flexible fixture using the configured design system.

[0066] Before step S102, the first part of the configuration design system is as follows: Figure 2 As shown, Figure 2 It is a flow chart of the steps of preparing models and data of various structural parts of a flexible fixture in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention. In the embodiment of the present application, the model of the flexible fixture structural part is built into the design system, including a three-dimensional geometric model (i.e., the three-dimensional model of the flexible fixture structural part in the embodiment of the present application), and a database file (i.e., the database file stored in the database in the embodiment of the present application). According to the characteristics of the flexible fixture, the design system builds a database mainly around the basic parts, telescopic devices, clamping devices, workbenches, auxiliary parts and other structural parts that constitute the flexible fixture. The content of the database includes two parts: one is a data file stored in the form of a database file, and the other is a basic parametric three-dimensional model with shape characteristics.

[0067] The process of creating a database can be: using the product model of the flexible fixture as the key field, associating the entered series of data, the series of data includes the geometric information series, assembly information series, and calculation information series of each structural part, and saving them in the form of a database file. The database fields are as follows: Figure 3 As shown, Figure 3 It is a schematic diagram of database fields in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0068] The process of creating a three-dimensional model of the structural parts of the flexible clamp can be: through parametric modeling technology, a parametric model is constructed based on CAD software. The constructed models are mainly of two types. One is a basic rectangular parametric model for rectangular feature structural parts such as shells and auxiliary parts (that is, the basic rectangular parametric model in the embodiment of the present application), and the other is a basic cylindrical parametric model for cylindrical features such as telescopic devices (that is, the basic cylindrical parametric model in the embodiment of the present application). The parameters and geometric shapes of the basic parametric three-dimensional model in the embodiment of the present application are as follows: Figure 4 As shown, Figure 4 It is a schematic diagram of the parameters and geometrical appearance of a basic parametric three-dimensional model in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0069] The interactive panel in the design system in the embodiment of the present application is as follows Figure 5a and Figure 5b As shown, that is, different tabs in the same design panel, one tab corresponds to a structural part, Figure 5a is a schematic diagram of an interactive panel for querying and designing structural parts in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention, Figure 5b It is a schematic diagram of another interactive panel for querying and designing structural parts in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0070] Optionally, the storage and retrieval methods of the structural parts in the flexible clamp are set according to the design characteristics of the flexible clamp, including: when the storage and retrieval methods of the structural parts include: a structural part design storage method and a structural part data export and import method, the structural part design storage method includes: designing an interactive panel according to the characteristic parameters of the structural parts of the shell and the telescopic device, so that the user can complete the design of the structural parts by entering the design values ​​through the interactive panel; storing the design values ​​entered by the interactive panel into the database to complete the storage; wherein the structural parts after storage are used for selection in the design stage; the method of exporting and importing the structural part data includes: designing an interactive panel including a structure tree and a filtering function according to the type of structural parts, so that the user can select the type and model of the structural parts to be exported through the interactive panel; according to the type and model of the structural parts selected in the interactive panel, filtering the corresponding data from the database and writing it into a file of a specified format, and when the user uses the export function in the interactive panel, saving the file in a specified format to a specified location; through the design import function, when the user opens a file of a specified format through the design import function, the data in the file is parsed and added to the existing files in the database to complete the import.

[0071] Specifically, in the embodiment of the present application, a method for entering and exiting the storage of structural parts in the flexible clamp (i.e., a method for entering and exiting the storage of structural parts in the embodiment of the present application) is set according to the design characteristics of the flexible clamp, including: a method for entering the design of structural parts into the storage and a method for exporting and importing structural parts data.

[0072] The ways to store structural parts design include:

[0073] Step 1: design an interactive panel according to characteristic parameters of structural parts such as a housing and a telescopic device, and the user (i.e., the user in the embodiment of the present application) can complete the design of the structural parts by inputting design values ​​through the interactive panel;

[0074] Step 2: Store the design values ​​inputted in the interactive panel into the database to complete the warehousing. The structural parts after warehousing can be selected in the design stage (ie, the second part: designing the flexible fixture of the design system after configuration).

[0075] The methods for exporting and importing structural part data include:

[0076] Step 1: Design an interactive panel including a structure tree and a filtering module according to the type of structural parts. The user (ie, the user in the embodiment of the present application) can select the type and model of the structural parts to be exported through the interactive panel.

[0077] Step 2: According to the type and specific model of the structural component selected in the interactive panel, the corresponding data is filtered from the database and written into a file of a specified format. When the user uses the export function in the interactive panel, the file is saved in the specified format to the specified location.

[0078] Step three: Design an import function. When the user (i.e., the user in the embodiment of the present application) opens a library file of a specified format through the import function, the design system parses the data in the file and adds it to the existing database file to complete the import.

[0079] In addition, taking the pin of a structural part as an example, according to the characteristics of the actual flexible fixture, the structural part design modeling method is designed as follows:

[0080] Step 1: Design two sets of calculation methods based on theoretical data and measured data. The calculation items and settlement results of the methods are different. The measured data includes two categories: the envelope area size information of the telescopic device part of the physical object, that is, the length and width of the maximum enclosed contour of the telescopic device in the horizontal plane, and the number of components in the telescopic device, that is, the maximum number of a single column and the total number of columns. Figure 6 As shown, Figure 6 It is a schematic diagram of measured data in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0081] Step 2: Take the input information as a variable and the extracted arrangement rules as a fixed quantity to calculate the diameter of the telescopic device. Figure 7 As shown, Figure 7 This is a schematic diagram of known quantities and unknown quantities in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention. The calculation steps are as follows:

[0082] Known quantities: envelope area length m, envelope area width n, number of pin rows q, maximum number of single row e.

[0083] Unknown quantity: red right triangle a, b, d

[0084] b=(ne*d) / (2*(e-1))+d / 2; Formula (1)

[0085] m=d+(q-1)*a;Formula (2)

[0086] a=\sqrt{d^2-b^2};Formula (3)

[0087] Simplifying formula 3, we get:

[0088] (4(e-1)^2-4(q-1)^2(e-1)^2+(q-1)^2)d^2-2(4m(e-1)^2+n(q-1)^2)d+4m^2(e-1)^2+(q-1)^2n^2=0

[0089] The above is a set of quadratic equations about the unknown variable d. According to the root-finding formula, the diameter d can be calculated.

[0090] Constraints, note:

[0091] q>=2;

[0092] a>=d / 2;

[0093] b>=d / 2;

[0094] e>1;

[0095] Calculation of the root formula when a is 0.

[0096] Step 3: After the user submits the result on the interactive panel, the design system will record the calculation result into the database, and the user can design and apply it in conjunction with the physical data.

[0097] Part 2: Designing a flexible fixture after configuration

[0098] Optionally, generating and saving the design data of the target flexible fixture through the design system in step S102 includes: selecting the model and assembly information of the target flexible fixture from the interactive interface of the design system; obtaining parameter values ​​from the database in the design system according to the model; determining the parameter values ​​and assembly information as design data and saving them.

[0099] Further, optionally, obtaining parameter values ​​from a database in the design system according to the model includes: when there is no parameter value corresponding to the model in the database, designing a structural component design corresponding to the model in the database, and inputting the structural component design into the database.

[0100] Step S104, generating a flexible fixture set model by determining the insertion point position in the target space and combining the design data;

[0101] Optionally, in step S104, the insertion point position is determined in the target space, and the flexible fixture set model is generated in combination with the design data, including: generating a flexible fixture model according to the three-dimensional model of the flexible fixture structure in the parameter value-driven design system; generating a primary flexible fixture set model according to the assembly information and the flexible fixture model; determining the insertion point in the target space according to the workpiece position of the target flexible fixture; and placing the primary flexible fixture set model according to the insertion point to obtain the flexible fixture set model.

[0102] Specifically, the process of generating a flexible fixture set model of a target flexible fixture through a design system is as follows:

[0103] Step 1: Design an interactive panel based on the structural characteristics of the flexible fixture, and the user can select each component through the panel;

[0104] Step 2: According to the information input in the interactive panel, obtain the basic parametric model type from the built library and retrieve the series data;

[0105] Step 3: Input the geometric information in the retrieved data into the acquired basic parametric model and generate a structural part model;

[0106] Step 4: According to the assembly information in the retrieved data and the algorithm using the pin as an example, the positioning data of each structural part is converted;

[0107] Step 5: Place the generated structural component model according to the positioning data in step 4;

[0108] Step 6: Store the models of the structural parts that have completed positioning in the form of blocks or groups to form the final fixture combination set model.

[0109] like Figure 8 As shown, Figure 8 This is a flow chart of generating a flexible fixture set model in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention. The user enters the interactive panel to select the structural parts first. When there is no module of the target model in the library, the structural parts can be designed in the provided library function. After the design of the structural parts is completed and stored in the library, return to the fixture design module and select the design again. After the flexible module selection is completed, it can be assembled, including the selection and parameter input of the support parts, the selection and parameter input of the clamping parts, etc. Figure 9a and Figure 9b As shown, Figure 9a is a schematic diagram of a flexible fixture design interaction panel in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention; Figure 9b is a schematic diagram of a flexible fixture design interaction panel in another fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention;

[0110] After the user completes the selection of the flexible module of the fixture and the assembly of other modules, the design system will generate a flexible fixture set model. The user can place the assembled flexible fixture by inserting points at appropriate spatial positions according to the position of the workpiece. After the layout is completed, the flexible fixture can be observed and adjusted through the view to obtain a preliminary design plan for the flexible fixture.

[0111] Step S106, calculating the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model, and obtaining the displacement value of the tangent point on the workpiece model and the flexible fixture set model;

[0112] Optionally, in step S106, the tangent point calculation is performed based on the characteristics of the workpiece model applied by the target flexible fixture and the flexible fixture set model to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model, including: step a, obtaining the cross-sectional position and sampling point value range of the telescopic device according to the characteristics of the telescopic device in the flexible fixture set model; step b, creating auxiliary line segments along the application conditions according to the sampling points in the sampling point range; step c, generating at least two intersection points according to the auxiliary line segments and the workpiece model and the flexible fixture set model; wherein the workpiece model is the workpiece model of the telescopic device; step d, based on to The method comprises the following steps: calculating the angle between the normal vectors of at least two intersection points on each auxiliary line segment according to the normal vectors of at least two intersection points; selecting the minimum angle from the angles of the normal vectors of at least two intersection points, and determining the auxiliary line segment and the sampling point where the minimum angle is located; reconstructing the square to create the sampling point based on the sampling point as the center point; repeating steps a to f until the angle is approximately 0, and determining the point corresponding to the angle as the tangent point; and obtaining the displacement value of the tangent point on the workpiece model and the flexible fixture set model according to the position distance of the tangent point on the workpiece model and the flexible fixture set model.

[0113] Specifically, according to the application characteristics of the flexible fixture, the simulation calculation method of the flexible fixture obtains surface data by analyzing the imported workpiece model and the generated flexible fixture model, and calculates the tangent position of each surface of the workpiece and the surface of the flexible fixture through an algorithm, and calculates the telescopic value of the telescopic device based on the calculated tangent point. The design steps of the algorithm are as follows:

[0114] like Fig.10 As shown, Fig.10 It is a flow chart of the simulation calculation link of the flexible fixture in the fixture design method based on three-dimensional technology according to the first embodiment of the present invention. After completing the arrangement of the flexible fixture, the user can select the workpiece model and the arranged flexible module to determine the model involved in the calculation.

[0115] Step a, the design system determines the cross-sectional position and sampling points of the model according to the characteristics of the telescopic device model of the flexible clamp, such as taking the maximum enveloping rectangle as the first value range, and selecting nine points including corner points, midpoints, and center points as the first sampling points.

[0116] Step b, creating auxiliary line segments according to the sampling points and along the application conditions;

[0117] In step c, the auxiliary line segment will generate two intersection points with the workpiece model and the flexible fixture model, for example, 18 intersection points.

[0118] Step d, find the normal vectors of the two intersection points, such as 18 normal vectors; and find the angle between the two normal vectors on each auxiliary line, such as 5 angles.

[0119] Step e: Select the auxiliary line and sampling point where the minimum angle is located, for example, one point among the nine points.

[0120] Step f, using this point as the center point, reconstruct the square to create sampling points, such as four intersection points.

[0121] Repeat steps a to f until the angle is approximately 0.

[0122] The intersection point generated by this sampling point is defined as the tangency point of the two models.

[0123] The distance between the two intersection points generated by the sampling point is the calculated distance. Fig.11 As shown, Fig.11 It is a schematic diagram of an interactive interface of a simulation calculation link of a flexible fixture in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0124] Step S108, determining whether to perform simulation of the flexible fixture according to the displacement value;

[0125] Optionally, determining whether to simulate the flexible fixture based on the displacement value in step S108 includes: obtaining a flexible fixture set model; determining through a design system whether the flexible fixture set model calculates the displacement value; if the judgment result is yes, moving the flexible fixture set model for simulation based on the calculated displacement value to obtain a simulated flexible fixture set model; and determining through the design system whether to save the simulated state of the flexible fixture set model based on control instructions fed back by the user.

[0126] Specifically, the calculated value preview method is used to determine the model object that needs to be previewed by designing an interactive panel, and identification information is retrieved based on the determined model object, including whether the model object participates in the calculation and the expansion value information after the calculation. By calling the CAD editing function-related API, the position state of the model is changed according to the acquired information, and whether to retain the state of the model after displacement is determined based on the interaction of the panel.

[0127] like Fig.12 As shown, Fig.12 This is a flow chart of the fixture model simulation process in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention. The user determines the flexible fixture to be simulated through the interactive panel, and the design system automatically determines whether the selected flexible fixture set model participates in the calculation process. The user can determine whether to retain the simulation state through the check box provided in the interactive panel. Fig.13 As shown, Fig.13 It is a schematic diagram of an interactive panel of a fixture model simulation link in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0128] Step S110 , checking the target flexible fixture according to the simulation result, and generating a target flexible fixture assembly model.

[0129] Optionally, in step S110, the target flexible fixture is checked based on the simulation results, and generating a target model includes: obtaining a stroke threshold of the flexible fixture set model; comparing the stroke threshold with the displacement value, and adjusting the simulated flexible fixture set model according to the comparison result; obtaining the model of the target flexible fixture and the series data corresponding to the model through user reselection; generating the target flexible fixture set model based on the reselected model and series data, and saving each series data of the target flexible fixture set model in a specified format to generate a report file.

[0130] Specifically, according to the data requirements of the PLC equipment, the output results include:

[0131] Step 1: Display the exportable fields in the form of an interactive panel.

[0132] Step 2: The user determines the range of field values ​​that need to be counted by selecting the target model.

[0133] Step 3: According to the target model confirmed by the interactive panel, list the values ​​of the corresponding fields in the database in the order of a certain field value.

[0134] Step 4: Store and save the limited field value in the specified format according to the location specified by the interactive panel.

[0135] like Fig.14 As shown, Fig.14 This is a flow chart of checking and adjusting the fixture components through simulation values ​​in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention. When using the preview function of the system, the user can choose not to close the interactive panel. The contact between the flexible fixture and the workpiece can be observed by rotating the viewport and other operations. When adjustment is required, the interactive panel can be closed, and the specific model object can be double-clicked to enter the editing interface of the flexible fixture, or the layout position can be adjusted through the CAD function.

[0136] like Fig.15 As shown, Fig.15 The figure is a flow chart of the output link of the fixture design method based on three-dimensional technology according to the first embodiment of the present invention, wherein the user uses the statistical function to view the statistical fields and selects the target model by the mouse. The system retrieves the system data according to the selected target model. The data is stored in a fixed format according to the specified location. Fig.16 As shown, Fig.16 It is a schematic diagram of an interactive interface for outputting output objects in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0137] In an optional preferred example, in combination with step S102 to step S110, the fixture design method based on three-dimensional technology provided in the embodiment of the present application is specifically as follows:

[0138] Users can import workpiece models in any 3D format into the system, such as Fig.17 As shown, Fig.17 FIG. 1 is a schematic diagram of a workpiece model importing system in a fixture design method based on three-dimensional technology according to an embodiment of the present invention. The imported workpiece model can be as follows: Fig.18 As shown, Fig.18 It is a schematic diagram of a workpiece model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0139] The user designs the flexible fixture according to the characteristics and placement of the workpiece, including the selection and assembly of the flexible fixture. Fig.19 As shown, Fig.19 It is a schematic diagram of a flexible fixture design in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0140] The design system in the embodiment of the present application can view relevant data to help users quickly select models. Fig. 20 As shown, Fig. 20 It is a schematic diagram of a query interface in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0141] The new method of structural parts is divided into theoretical data input design mode and measured data input design mode. The interactive interface of the theoretical data input design mode is as follows: Fig.21 As shown, Fig.21 It is a schematic diagram of an interactive interface of a theoretical data input design mode in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0142] The interactive interface of the measured data input design mode is as follows Fig. 22 As shown, Fig. 22 It is an interactive interface for inputting design mode of measured data in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0143] Users can also select other structural parts through the flexible fixture design module, such as Fig.23 As shown, Fig.23 It is a schematic diagram of the selection of structural parts in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0144] Click OK to generate the flexible fixture set model, such as Fig.24 As shown, Fig.24It is a schematic diagram of a flexible fixture set model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0145] Place the flexible fixture set model according to the position of the workpiece and the actual application conditions of the fixture, such as Fig.25 As shown, Fig.25 It is a schematic diagram of placing a flexible fixture set model in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0146] Select the arranged fixture model and workpiece for calculation and get the calculated value. Fig.26 As shown, Fig.26 It is a schematic diagram of a calculation interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0147] The model status after the calculation is completed is as follows Fig. 27 As shown, Fig. 27 It is a schematic diagram of a model state after calculation is completed in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0148] Select the fixture model that has completed the calculation, simulate it, and get the simulation status. Use the simulation results of the model to determine whether the fixture model meets the design requirements. Fig.28 As shown, Fig.28 FIG. 1 is a schematic diagram of determining a simulation object interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention. Fig.29 As shown, Fig.29 It is a schematic diagram of the model state of the simulation result in a fixture design method based on three-dimensional technology according to the first embodiment of the present invention.

[0149] When the user determines that the fixture model is not satisfactory through simulation, the user can adjust the fixture model, including the fixture components, assembly, position, etc., until the simulation results meet the design requirements. Fig.30 As shown, Fig.30 It is a schematic diagram of a position adjustment operation in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0150] The user can choose to save the simulation state to confirm the characteristics of the fixture solution, such as Fig.31 As shown, Fig.31 FIG. 1 is a schematic diagram of a saving interface in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention. The model after saving the position state is as follows: Fig.32 As shown, Fig.32 It is a schematic diagram of a model after the position state is saved in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0151] The user can select a specific flexible fixture and export the simulation calculation values, such as Fig.33 As shown, Fig.33 It is a schematic diagram of an interface for exporting simulation calculation values ​​in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0152] Report details preview as follows Fig.34 As shown, Fig.34 It is a schematic diagram of reporting details in a fixture design method based on three-dimensional technology according to Embodiment 1 of the present invention.

[0153] The embodiment of the present application provides a fixture design method based on three-dimensional technology. The user can quickly define the characteristics of each module of the flexible fixture and store it in the warehouse through the design system. The user can quickly complete the assembly design of the flexible fixture and generate the corresponding set model through the encapsulated flexible fixture design function. The user can perform simulation calculations of the flexible fixture to verify the design scheme, and intuitively see the simulation effect and adjust the design. The user can export the simulated data and use it in the actual installation adjustment.

[0154] The present invention adopts the above technical scheme, generates and saves the design data of the target flexible fixture through the design system; generates a flexible fixture set model by determining the insertion point position in the target space and combining it with the design data; calculates the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model, and obtains the displacement value of the tangent point on the workpiece model and the flexible fixture set model; determines whether to simulate the flexible fixture based on the displacement value; checks the target flexible fixture based on the simulation results, and generates the target flexible fixture set model. Compared with the prior art, the present invention has the following technical effects: easy operation and improved model generation efficiency of the design system.

[0155] Example 2

[0156] An exemplary embodiment of the present invention is as follows Fig.35 As shown, Fig.35 is a schematic diagram of a fixture design device based on three-dimensional technology according to Embodiment 2 of the present invention. A fixture design device based on three-dimensional technology provided in the embodiment of the present application includes:

[0157] The data generation and preservation module 3502 is used to generate and preserve the design data of the target flexible fixture through the design system; the model generation module 3504 is used to generate a flexible fixture set model by determining the insertion point position in the target space and combining it with the design data; the calculation module 3506 is used to calculate the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model; the simulation module 3508 is used to determine whether to simulate the flexible fixture based on the displacement value; the model editing module 3510 is used to check the target flexible fixture based on the simulation results and generate the target flexible fixture set model.

[0158] The present invention adopts the above technical scheme, generates and saves the design data of the target flexible fixture through the design system; generates a flexible fixture set model by determining the insertion point position in the target space and combining it with the design data; calculates the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model, and obtains the displacement value of the tangent point on the workpiece model and the flexible fixture set model; determines whether to simulate the flexible fixture based on the displacement value; checks the target flexible fixture based on the simulation results, and generates the target flexible fixture set model. Compared with the prior art, the present invention has the following technical effects: easy operation and improved model generation efficiency of the design system.

[0159] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture design method based on three-dimensional technology, characterized in that: include: Generate and save the design data of the target flexible fixture through the design system; By determining the insertion point position in the target space, a flexible fixture set model is generated in combination with the design data; Calculating the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model; Determining whether to perform simulation of the flexible fixture according to the displacement value; The target flexible fixture is checked according to the simulation results, and a target flexible fixture set model is generated.

2. The fixture design method based on three-dimensional technology according to claim 1 is characterized in that: Before generating and saving the design data of the target flexible fixture by the design system, the method further includes: Create a 3D model and database of the structural parts of the flexible fixture; According to the design characteristics of the flexible clamp, a storage and retrieval method of the structural parts in the flexible clamp is set; The workpiece model corresponding to the target flexible fixture is imported into the design system.

3. The fixture design method based on three-dimensional technology according to claim 2 is characterized in that: The three-dimensional model of the structural part of the flexible fixture is created by: constructing a parametric model based on CAD software through parametric modeling technology to obtain the three-dimensional model of the structural part of the flexible fixture, wherein the three-dimensional model includes: a basic rectangular parametric model of the structural part with rectangular characteristics, and a basic cylindrical parametric model with cylindrical characteristics; The creation of the database includes: using the product model of the flexible fixture as a key field, associating the entered series data, and saving it in the form of a database file, wherein the series data includes a geometric information series, an assembly information series, and a calculation information series of each structural component.

4. The fixture design method based on three-dimensional technology according to claim 2 is characterized in that: The storage and unloading method of the structural parts in the flexible clamp is set according to the design characteristics of the flexible clamp, including: In the case where the storage and retrieval methods of the structural parts include: a structural part design storage method and a structural part data export and import method, the structural part design storage method includes: designing an interactive panel according to characteristic parameters of the structural parts of the shell and the telescopic device, so that the user can complete the design of the structural parts by inputting design values ​​through the interactive panel; storing the design values ​​input by the interactive panel into the database to complete the storage; wherein the stored structural parts are used for selection in the design stage; The method for exporting and importing structural component data includes: designing an interactive panel including a structure tree and a filtering function according to the type of structural component, so that the user can select the type and model of the structural component to be exported through the interactive panel; filtering corresponding data from the database according to the type and model of the structural component selected in the interactive panel, and writing the data into a file of a specified format, and when the user uses the export function in the interactive panel, saving the file in a specified format to a specified location; and using a design import function, when the user opens the file of the specified format through the design import function, parsing the data in the file and adding it to the existing files in the database to complete the import.

5. The fixture design method based on three-dimensional technology according to any one of claims 1 to 4, characterized in that: The design data of the target flexible fixture generated and saved by the design system includes: Selecting the model and assembly information of the target flexible fixture from the interactive interface of the design system; Obtaining parameter values ​​from a database in the design system according to the model; The parameter values ​​and the assembly information are determined as the design data and saved.

6. The fixture design method based on three-dimensional technology according to claim 5 is characterized in that: The acquiring of parameter values ​​from a database in the design system according to the model comprises: When the database does not have a parameter value corresponding to the model, a structural component design corresponding to the model is designed in the database, and the structural component design is input into the database.

7. The fixture design method based on three-dimensional technology according to claim 5, characterized in that: The generating of the flexible fixture set model by determining the insertion point position in the target space and combining the design data comprises: Driving the three-dimensional model of the flexible fixture structure in the design system according to the parameter value to generate a flexible fixture model; Generate a primary flexible fixture set model according to the assembly information and the flexible fixture model; Determining an insertion point in the target space according to the workpiece position of the target flexible fixture; The primary flexible fixture set model is placed according to the insertion point to obtain the flexible fixture set model.

8. The fixture design method based on three-dimensional technology according to claim 7 is characterized in that: The calculation of the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model includes: Step a, obtaining the cross-sectional position and sampling point value range of the telescopic device according to the characteristics of the telescopic device in the flexible clamp set model; Step b, creating auxiliary line segments along the application conditions according to the sampling points in the sampling point range; Step c, generating at least two intersection points according to the auxiliary line segment, the workpiece model and the flexible fixture set model; Step d, calculating the angle between the normal vectors of the at least two intersection points on each auxiliary line segment according to the normal vectors of the at least two intersection points; Step e, selecting a minimum angle from the angles of the normal vectors of the at least two intersection points, and determining the auxiliary line segment and sampling point where the minimum angle is located; Step f, reconstructing a square to create a sampling point based on the sampling point as the center point; Step g, repeating steps a to f until the angle is approximately 0, and determining the point corresponding to the angle as the tangent point; Step h: calculating the position distance of the tangent point on the workpiece model and the flexible fixture set model to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model.

9. The fixture design method based on three-dimensional technology according to claim 8, characterized in that: The step of determining whether to perform simulation of the flexible fixture according to the displacement value includes: Obtaining the flexible fixture set model; Determining, by the design system, whether the flexible fixture set model calculates the displacement value; If the judgment result is yes, the flexible fixture set model is moved to perform simulation according to the calculated displacement value to obtain the simulated flexible fixture set model; The design system determines whether to save the simulated state of the flexible fixture set model according to the control instruction fed back by the user.

10. The fixture design method based on three-dimensional technology according to claim 9, characterized in that: The step of checking the target flexible fixture according to the simulation results and generating the target flexible fixture set model comprises: Obtaining a travel threshold of the flexible fixture set model; Comparing the stroke threshold with the displacement value, and adjusting the simulated flexible fixture set model according to the comparison result; Acquiring the model of the target flexible fixture and the series data corresponding to the model through the user's reselection; The target flexible fixture set model is generated according to the reselected model and the series data, and each series data of the target flexible fixture set model is saved in a specified format to generate a report file.

11. A fixture design device based on three-dimensional technology, characterized in that: include: A data generation and storage module is used to generate and store the design data of the target flexible fixture through the design system; A model generation module, used to generate a flexible fixture set model by determining the insertion point position in the target space and combining the design data; A calculation module, used for calculating the tangent point based on the characteristics of the workpiece model used by the target flexible fixture and the flexible fixture set model, to obtain the displacement value of the tangent point on the workpiece model and the flexible fixture set model; A simulation module, used to determine whether to simulate the flexible fixture according to the displacement value; The model editing module is used to check the target flexible fixture according to the simulation results and generate a target flexible fixture set model.

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