CN105426574A - Method for fast switching from process and performance requirements to design parameter of injection molding equipment - Google Patents

Abstract

The invention discloses a method for quickly converting injection molding equipment technology and performance requirements to design parameters. Establish three-dimensional models for various injection molded parts that need to be processed and perform numerical simulation analysis to obtain injection molding equipment process requirements; gather injection molding equipment process requirements or injection molding equipment performance requirements to establish injection molding requirements-design parameter sets, and express injection molding requirements and design through multi-color sets For the relationship between parameters, the Budoser matrix is sorted by row transformation, and then the injection molding requirements-design parameter sets are sorted in turn and the parameters are calculated to obtain the results of the design parameters of the injection molding equipment. The invention realizes conversion analysis of injection molding requirements of injection molding equipment, and solves the problem that existing injection molding equipment designs cannot be reasonably customized for injection molding requirements.

Description

A method for rapid conversion of injection molding equipment process and performance requirements to design parameters

technical field

The invention relates to conceptual design methods of complex injection molding equipment, in particular to a method for rapidly converting injection molding equipment process and performance requirements to design parameters.

Background technique

Acquisition of design parameters is the advance of product scheme and structure design. Only after the design parameters of the injection molding equipment are determined can the detailed structural design be further carried out. Therefore, how to quickly and accurately obtain the design parameters is an important issue in the design of injection molding equipment.

The design of injection molding equipment needs to meet the requirements of injection molding, and the design parameters of injection molding equipment need to be determined according to the requirements of injection molding. Due to the diversification and individualized development of injection molding requirements, the current injection molding requirements analysis methods mainly include quality function deployment, case reasoning, neural network optimization, etc., but these methods still have the following deficiencies:

1. It only stays in the qualitative mapping between injection molding requirements and design schemes, and cannot detail the values of design parameters.

2. It is not only too dependent on the subjective evaluation of experts, but also difficult to adapt to the diversified requirements of customers. Moreover, there is a lack of regular mapping of the design parameters with strong coupling of injection molding equipment.

3. When the design rules change, it is difficult to respond quickly, and the design process needs to be re-analyzed and corrected, which makes the design efficiency low.

Contents of the invention

In order to solve the problems existing in the background technology, the object of the present invention is to provide a method for quickly converting injection molding equipment process and performance requirements to design parameters, combining injection molding requirements-design parameters with formula conversion and mapping conversion, and further through multiple Color set processing converts injection molding process and performance requirements into injection molding equipment design parameters.

In order to achieve the above object, the present invention adopts technical solution steps as follows:

The first step is to establish three-dimensional models for various injection molded parts that need to be processed and conduct numerical simulation analysis to obtain the technical requirements of injection molding equipment;

The second step is to establish the injection molding requirements-design parameter set. The injection molding requirements are the process requirements of injection molding equipment or the performance requirements of injection molding equipment. The injection molding requirements-design parameter set includes the process requirements of injection molding equipment or the performance requirements of injection molding equipment through formula conversion calculation or through mapping conversion. The relationship expresses the conversion relationship to design parameters in a unified manner;

The third step is to express the relationship between injection molding requirements and design parameters through a multi-color set, and construct a multi-color Boolean matrix by using injection molding requirements as a unified input color and design parameters as a unified output color;

The fourth step is to sort the rows of the Budoser matrix so that the injection molding requirement-design parameter set with the only parameter item is located at the front of the row of the matrix, and then the rest of the injection molding requirement-design parameter sets containing the obtained parameter items Sequentially sort and perform parameter calculation to obtain the results of the design parameters of injection molding equipment.

The injection molding equipment process requirements include the length, width and height of the injection molded part, the maximum cross-sectional area of the injection molded part, the minimum cross-sectional area of the injection molded part, the volume of the injection molded part, the density of the injection molded part, the components of the injection molded part, the material of the injection molded part, the initial temperature of the injection molded part and the Forming pressure, etc.

The specific steps for obtaining the technical requirements of injection molding equipment in the first step are as follows: establish three-dimensional models of various processed injection molded parts, import the three-dimensional models into the injection molding process analysis software, divide the three-dimensional models into grids, set the boundary conditions of import and export, environment Parameters such as temperature and pressure, through numerical simulation analysis, obtain the process requirement data of injection molding equipment including pressure field, temperature field, and injection molding cycle of injection molded parts.

The performance requirements of the injection molding equipment include the delivery efficiency of injection molding parts, the qualified rate of injection molding parts, the trouble-free working time, the price of injection molding machines, the energy consumption of injection molding machines, the recyclability of parts and the total recycling benefits.

The injection molding requirement-design parameter set in the second step is expressed as u _i ={Id,N,P,Flag,Trans}, where u _i represents the i-th injection molding requirement-design parameter set, Id represents the generator number, N is the set of requirement items under the conversion relationship, P is the set of parameter items under the conversion relationship, Flag is the identification of the conversion relationship, and Trans is the conversion relationship. The conversion relation Trans includes two forms, one is formula conversion and the other is mapping conversion; when Flag=1, the conversion relation is formula conversion, and when Flag=0, the conversion relation is mapping conversion.

The conversion relationship Trans adopts formula conversion or mapping conversion. When the conversion relationship Trans adopts formula conversion, the conversion relationship flag Flag=1; when the conversion relationship Trans adopts formula conversion or mapping conversion, the conversion relationship flag Flag=0.

The multi-color Boolean matrix establishment steps of the third step are as follows:

In the first step, take the injection molding requirements-design parameter set as the elements in the multicolor set, and construct the multicolor set A={u ₁ ,u ₂ ,...,u _i ,...u _n }, where n is all Injection molding requirements - number of design parameter sets;

The second step is to set the overall color set of the multi-color set A as F(A), where F(A)={F _i (A), F _o (A)}, and F _i (A) is the process and performance requirements The overall color is used as a unified input color, F _o (A) is the design parameter and the overall color is used as a unified output color;

The third step is to express the personality of the elements in the set A by Q(u)={q(u ₁ ),q(u ₂ ),...,q(u _i ),...,q(u _m )} Color, where the individual color is represented by all requirements and parameters, m is the sum of the requirements and design parameters, and q(u _i ) represents the individual color value of each element of the injection molding requirements-design parameter set;

The fourth step is to construct a multi-color Boolean matrix A×Q(u) with the injection molding requirement-design parameter set as the column and the individual color set Q(u) of the elements in the multi-color set A as the row, and the injection molding requirement-design parameter set The individual color value q(u _i ) corresponding to the requirement item set N and the parameter item set P is 1, and the other individual color values q(u _i ) are 0, that is, other elements in the injection molding requirement-design parameter set or injection molding Requirement-the individual color value q(u _i ) of the position where the requirement item set N does not correspond to the parameter item set P in the design parameter set is 0.

The multi-color Boolean matrix row transformation steps are as follows:

The first step is to initialize the row conversion pointer s=1; traverse all injection molding requirements-design parameter sets, and judge the conversion type Flag of each injection molding requirement-design parameter set, if Flag=0, then the injection molding requirement-design parameter set is located line moves to the last line;

The second step is to traverse each injection molding requirement-design parameter set with Flag=1 in turn: for each injection molding requirement-design parameter set, if the number of elements in the parameter item set P is equal to 1, then the injection molding requirement-design parameter set is located Change the line to the first line and move the elements in the parameter item set P to the set X; set s=t+1, t is the injection molding requirement that the number of elements in the parameter item set P is equal to 1 - the total number of design parameter sets;

The third step is to traverse all the injection molding requirements-design parameter sets corresponding to the elements in the set X: for each injection molding requirement-design parameter set, if the number of elements in the parameter item set P is equal to 1, then the injection molding requirement-design parameter set Move to line s and move the unique element of the parameter item set P into set X, then set s=s+1.

The parameter calculation in the fourth step refers to calculating the transformation relationship in the injection molding requirement-design parameter set according to the arrangement order of the rows on the basis of completing the line transformation, and obtaining the design parameter set of the injection molding equipment.

The formula conversion described above converts the required data into design parameters through physical calculation formulas in the design process of injection molding equipment. Specifically, calculation formulas and parameters in national standards and manuals can be used. For example, the conversion formula between the required data "injection molded part length Lw" and the design parameter "ejection stroke Ls" is as follows:

L _s =k _α L _w

In the formula, k _α is the conversion coefficient with a value of 1.2.

The mapping conversion is performed through the corresponding relationship between the required data and the design parameter data, and its mapping function structure is as follows:

$\mathrm{<span\; class="notranslate">\; f</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\left\{\begin{array}{cc}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}& \mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&Element;</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\\ {\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}& \mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&Element;</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\\ & <span\; class="notranslate">\; ...</span>\\ {\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}& \mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&Element;</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}\\ & <span\; class="notranslate">\; ...</span>\\ {\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}& \mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&Element;</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}\end{array}\right.$

In the formula, f(x) is the mapping function; n is the dimension of the mapping unit, R is the value space of the required data, p _i is the corresponding value of the design parameter data (i=1,2,...,n).

When the formula is converted and calculated, the corresponding intermediate parameter data can be directly read from the design knowledge base, which contains the intermediate parameters in the calculation formula and the standard data of injection molding machine manufacturing, which are stored in the database in the form of data sets , easy to add and modify.

Aiming at the problem that the analysis of injection molding requirements of injection molding equipment is difficult to convert into design parameters of injection molding equipment, and design parameters are often assigned by design experience or referred to similar design models, the present invention proposes numerical simulation analysis, theoretical or empirical formula calculation, and requirement-parameter rule mapping The method of converting injection molding requirements to design parameters combined with prior design knowledge solves the problem that the existing injection molding equipment design cannot be reasonably customized for injection molding requirements, and realizes the combination of numerical simulation, formula derivation, and design experience. Injection molding equipment injection molding requires conversion analysis.

The beneficial effects of the present invention are:

The method of the present invention realizes the intelligence of the injection molding equipment process module, and converts the abstract injection molding equipment process requirements into concrete process parameter information such as volume, quality, pressure field, temperature field, etc. by means of models and cloud images, and improves design efficiency and accuracy. sex.

The method of the invention realizes the process of transforming injection molding requirements into design parameters, avoids subjective factors of empirical design and analogy design according to formula calculation and rule mapping, and obtains more reasonable conversion results.

Description of drawings

Figure 1 is a flow chart of the method of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The information involved in the figures is the actual application data of the present invention in the design of injection molding equipment.

As shown in Figure 1, it is a general diagram of the conversion process of the present invention.

Concrete embodiment of the present invention and process thereof are as follows:

The first step is to establish a three-dimensional model and conduct numerical simulation analysis according to various injection molded parts required by injection molding to obtain the process requirements of injection molding equipment;

In the second step, according to the requirement information input by the user, after eliminating conflicts, deficiencies, and redundant data in the requirements, it is mapped to the performance requirements of injection molding equipment, and together with the process requirements of injection molding equipment, it is used as injection molding requirements, see Table 1;

Table 1 Injection molding equipment process and performance requirements

The third step is to establish injection molding requirements-design parameter sets according to the calculation formula and mapping relationship of injection molding equipment, see Table 2;

Table 2 Injection Molding Requirements - List of Design Parameter Sets

The fourth step is to define the uniform color and personal color of the multi-color set, and establish a multi-color Boolean matrix. The multi-color Boolean matrix is as follows:

The fifth step is to obtain the parameter calculation sequence through matrix row transformation, and complete the conversion from requirements to design parameters through the conversion unit in the injection molding requirements-design parameter set. The intermediate coefficient data are shown in Table 3;

Table 3 Default parameter list

The sixth step is to add the manufacturing standard data of the injection molding machine into the design parameter data set of the conversion result to form an overall design parameter data set, see Table 4.

Table 4 Overall design parameter data set

Therefore, the present invention solves the problem that the existing injection molding equipment design cannot be reasonably customized for injection molding requirements, and realizes the conversion analysis of injection molding equipment injection molding requirements that combines numerical simulation, formula derivation, and design experience.

The above specific embodiments are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification and change made to the present invention will fall into the protection scope of the present invention.

Claims (9)

1. injection moulding equipment technique and performance requirement are to a method for design parameter rapid translating, it is characterized in that the method step is as follows:

The first step, to needing the various mouldings of processing set up three-dimensional model and carry out numerical simulation analysis, obtains injection moulding equipment technological requirement;

Second step, sets up injection moulding requirement-design parameter set, and injection moulding requires as injection moulding equipment technological requirement or the injection moulding equipment performance requirement for inputting;

3rd step, represents the mutual relationship of injection moulding requirement and design parameter by polychromatic sets, injection moulding is required, as unified input color, design parameter builds polychrome Boolean matrix as the unified color that exports;

4th step, line translation sequence is carried out to your matrix of cloth polychrome, make the injection moulding with unique parameters item require-that design parameter set is positioned at the row of matrix is anterior, again all the other are comprised the injection moulding of trying to achieve parameter item to require-sort successively line parameter of going forward side by side of design parameter set calculates, and obtains the result of injection moulding equipment Design parameter.

2. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: described injection moulding equipment technological requirement comprises moulding length, width and height, moulding maximum secting area, moulding minimum sectional area, moulding volume, moulding density, moulding component, moulding material, moulding initial temperature and moulding forming pressure etc.

3. a kind of injection moulding equipment technique according to claim 1 and 2 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: the concrete steps obtaining injection moulding equipment technological requirement in the described first step are as follows: the three-dimensional model setting up various processing moulding, three-dimensional model is imported injection moulding process analysis software, and by three-dimensional model grid division, arrange and import and export boundary condition, environment temperature, pressure and other parameters, obtain through Numerical Simulation Analysis the injection moulding equipment technological requirement data comprising moulding pressure field, temperature field, injection cycle.

4. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: described injection moulding equipment performance requires to include moulding and goes out part efficiency, moulding qualification rate, time between failures, injection machine price, injection machine complete machine energy consumption, part recovery rate and reclaim total benefit.

5. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: the injection moulding requirement-design parameter set of described second step is expressed as u _i={ Id, N, P, Flag, Trans}, wherein u _irepresent i-th injection moulding requirement-design parameter set, Id represents that generator is numbered, and N is the requirement set under transformational relation, and P is the parameter item set under transformational relation, and Flag is transformational relation mark, and Trans is transformational relation.

6. a kind of injection moulding equipment technique according to claim 5 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: described transformational relation Trans adopts formula conversion or Mapping and Converting, when transformational relation Trans adopts formula conversion, then transformational relation mark Flag=1; When transformational relation Trans adopts formula conversion or Mapping and Converting, then transformational relation mark Flag=0.

7. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: the polychrome Boolean matrix establishment step of described 3rd step is as follows:

The first step, using injection moulding requirement-design parameter set as the element in polychromatic sets, builds polychromatic sets A={u ₁, u ₂..., u _i... u _n, wherein n is the quantity of all injection mouldings requirement-design parameter set;

Second step, the integral color set of setting polychromatic sets A is F (A), wherein F (A)={ F _i(A), F _o(A) }, F _i(A) for technique and performance requirement integral color are as unified input color, F _o(A) for design parameter integral color exports color as unified;

3rd step, by Q (u)={ q (u ₁), q (u ₂) ..., q (u _i) ..., q (u _m) represent the individual character color of element in set A, wherein individual character color all requirements and parameter item represents, m for requiring and design parameter item quantity sum, q (u _i) represent the individual character color value of injection moulding requirement-design parameter set every element;

4th step, using injection moulding requirement-design parameter set as row, in polychromatic sets A, individual character color set Q (u) of element is as row, build polychrome Boolean matrix A × Q (u), the corresponding individual character color value q (u located of requirement set N and parameter item set P in injection moulding requirement-design parameter set _i) be 1, all the other individual character color values q (u _i) be 0.

8. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: described polychrome Boolean matrix line translation step is as follows:

The first step, initialization line translation pointer s=1; Then travel through all injection mouldings requirement-design parameter set, judge the translation type Flag of each injection moulding requirement-design parameter set, if Flag=0, then the row at this injection moulding requirement-design parameter set place is moved to last column;

Second step, travel through the injection moulding requirement-design parameter set of each Flag=1 successively: for each injection moulding requirement-design parameter set, if number of elements equals 1 in parameter item set P, then the row at this injection moulding requirement-design parameter set place changed to the first row and the element in parameter item set P moved in set X; Be that the injection moulding that in parameter item set P, number of elements equals 1 requires-design parameter set sum by s=t+1, t;

3rd step, travel through and allly comprise injection moulding corresponding to element in set X and require-design parameter set: for each injection moulding requirement-design parameter set, if number of elements equals 1 in parameter item set P, then this injection moulding requirement-design parameter set is moved to s capable and the only element in this parameter item set P is moved to set X in, then by s=s+1.

9. a kind of injection moulding equipment technique according to claim 1 and performance requirement are to the method for design parameter rapid translating, it is characterized in that: the parameter calculating in described 4th step refers to and completes on line translation basis, according to must putting in order of row, calculate the transformational relation in injection moulding requirement-design parameter set according to this, obtain the design parameter set of injection moulding equipment.