阅读说明：本技术 汽车模具智能设计方法 (Intelligent design method for automobile mold ) 是由 闫庆禹 王冀军 李健 陈科 梁晓君 于 2021-06-18 设计创作，主要内容包括：本发明涉及汽车模具结构设计领域,具体涉及一种汽车模具智能设计方法,实现了模具结构的自动化生成,极大地提高了模具结构设计工作效率,并且极大地降低了对设计人员的工作经验以及技能水平的严重依赖。本发明汽车模具智能设计方法,包括：输入DL工艺方案图,根据输入的DL工艺方案图,对各工序涉及的模具工作内容进行定义,将DL工艺方案图中各个工序内容定义到对应工具体中,根据所选用的工艺工具调用相应的功能包生成对应工作部件,将生成的工作部件进行连接,形成模具结构。本发明适用于汽车模具的设计。(The invention relates to the field of automobile mold structure design, in particular to an intelligent automobile mold design method, which realizes automatic generation of a mold structure, greatly improves the work efficiency of mold structure design, and greatly reduces the serious dependence on the work experience and skill level of designers. The invention relates to an intelligent design method of an automobile mold, which comprises the following steps: the method comprises the steps of inputting a DL process scheme diagram, defining the working content of a die related to each procedure according to the input DL process scheme diagram, defining the content of each procedure in the DL process scheme diagram into a corresponding tool body, calling a corresponding function package according to a selected process tool to generate a corresponding working part, and connecting the generated working parts to form the die structure. The invention is suitable for the design of the automobile mould.)

1. The intelligent design method of the automobile mold is characterized by comprising the following steps:

step 1, inputting a DL process scheme diagram;

step 2, defining the working content of the die related to each procedure according to the input DL process scheme diagram;

step 3, defining each process content in the DL process scheme diagram into a corresponding tool body;

step 4, calling a corresponding function package according to the selected process tool to generate a corresponding working part;

and 5, connecting the generated working parts to form a die structure.

2. The intelligent design method for the automobile mold according to claim 1, wherein the step 1 further comprises inputting production information and technical standards.

3. The intelligent design method of the automobile mold according to claim 2, wherein in step 1, the DL process plan comprises product, process surface, process line and datum line information required by each process; the production information comprises a production press, the length, the width and the height of a die and an installation position; the technical standard comprises rib thickness and standard part selection standard information.

4. The intelligent design method for the automobile mold according to claim 1, wherein in the step 2, the work content comprises one or more combinations of drawing, trimming, punching, flanging and shaping.

5. The intelligent design method for the automobile mold according to claim 4, wherein in the step 3, the tool body comprises a tool line and a tool profile in the tool body.

6. The intelligent design method for the automobile mold according to claim 5, wherein in the step 3, the specific method for defining the contents of each process in the DL process scheme diagram to the tool line and the tool profile in the corresponding tool body comprises the following steps: if the process content is a drawing process, a parting line, a blank line, a female die profile, a male die profile and a blank holder profile are defined.

7. The intelligent design method for the automobile mold according to claim 1, wherein in step 4, the function packages comprise a press function package, a working part function package and a mold frame function package.

8. The intelligent design method for the automobile mold according to claim 7, characterized in that when defining the press function package, the tonnage of the press, the positioning device and the clamping device between the press and the mold, and the closing height information of the press are firstly matched.

9. The intelligent design method for the automobile mold according to claim 7, wherein when the functional package of the frame is defined, the cross frame is defined in advance, and the defining of the cross frame comprises the following steps: the method comprises the steps of guiding stroke, guiding mode, estimating lifting weight of the die and size information of the die, and establishing a die set virtual mathematical model through a set logical relation to form an entity.

10. The intelligent design method of the automobile mold according to claim 7, characterized in that when defining the work component function package, firstly, stroke definition is performed on each sub-function package of the work component function, a virtual mathematical model is established according to the stroke relation and the set logical relation, functional structure entities to be realized by each sub-function package are generated according to the corresponding generated logical relation through the virtual mathematical model, and the structure entities are constrained and spliced together to form each component of the mold.

11. The intelligent design method for automobile molds according to claim 10, characterized in that the generated logical relationship comprises a selection logic, a weight logic and a parameter and position logic.

12. The intelligent design method for automobile molds according to claim 11, characterized in that the specific application of the selective logic comprises:

for the selection of the wedge, the selection logic conditions comprise:

(1) selecting the type of the wedge according to the working content of the die;

(2) selecting an angle of the wedge according to the stamping direction of the working area of the die;

(3) working force and discharging force required by the area are calculated according to the length of the working edge of the die;

(4) selecting the width of a wedge mounting surface according to the area of a working area of the die;

(5) and when the standard wedge cannot be met, a self-made wedge is adopted.

13. The intelligent design method for automobile molds according to claim 12, characterized in thatThe method for selecting the wedge type comprises the following steps: the shaping range or the punching angle range of the die product or the stroke range of the wedge forming is recorded as [ a ]₁,a₂]And the punching angle or stroke range of the standard wedge is marked as [ b ]₁,b₂]Then, the similarity of the two ranges is calculated:wherein f is more than or equal to 0 and less than or equal to 1; if f is larger than the set similarity value, selecting a standard wedge; otherwise, selecting a self-made wedge.

14. The intelligent design method for automobile molds according to claim 12, characterized in that the selection of the wedge method according to the weighting logic comprises:

the typical structural characteristics of the standard wedge are set to be a, and the typical characteristics of the self-made wedge are set to be b; if the number of the typical structural features obtained by judgment in the wedge generating process is c;

if c & ltn & gt a & gt c & ltn & gt b & ltn & gt, selecting a standard wedge;

if c & ltn & gt a & lt c & ltn & gt b & lt, selecting a self-made wedge;

if c ^ n a ═ c ^ n b, then choose the oblique wedge manually.

15. The intelligent design method for the automobile mold according to claim 11, wherein the specific application of the parameter and position logic comprises determination of the parameter and position logic of the guide part; the parameters of the guide part comprise the external dimension and the mounting surface dimension, and the position logic of the guide part comprises the absolute dimension position of the guide device on the mould and the relative position from the boundary of the mould.

16. The intelligent design method for automobile molds according to claim 15, wherein the method for determining the position logic of the guide member comprises:

after inputting a die part blank, obtaining the x and y position values of the overall dimension of the die part blank, wherein x is the position dimension of the die part in the length direction, and y is the position dimension of the die part in the width direction;

width direction position W of guide member₁(y + j + k)/3; longitudinal position L of guide member₁＝(x+j+k)*n，n∈[1.1，,1.2](ii) a Wherein j is the empirical value of the die process, k is the product size correction coefficient, and k is y n₁，n₁∈[1.05,1.1]；

Length dimension b of guide member₁＝H*n₂，n₂∈[0.8,0.9]H is the stroke of the blank holder or the material pressing device, and is an integer which is 10 times;

width dimension a of guide member₁＞W₁*n₃，n₃∈[0.4,0.5]。

17. The intelligent design method for the automobile mold according to claim 1, wherein in step 5, the specific method for connecting the generated working components comprises the following steps: the working parts are connected by ribs with specified thickness and spacing.

18. The intelligent design method for the automobile mold according to claim 1, further comprising: and 6, optimizing the generated mould structure by adopting a manual detection mode, wherein the manual detection mode comprises the steps of detecting whether the functional module is lost, whether the associated part is subjected to parametric assembly, whether the type selection of the standard part meets the working requirement, whether the stroke relation is reasonable and whether the part movement is interfered.

Technical Field

The invention relates to the field of structural design of automobile molds, in particular to an intelligent design method of an automobile mold.

Background

When the automobile mold is used for structural design, although the structural characteristics of similar door, top cover and hood molds are similar, the automobile mold belongs to single-piece customized production, the process structures of the automobile mold are different, so that the current design concept of parameterization and modularization can only be adopted, the design concept is large in workload and large in repeated work, especially when the process design is required to be changed in the later period, the workload of mold modification is always high, the mold design efficiency and the quality are required to be seriously dependent on the working experience and skill level of designers, and the development of enterprises is seriously restricted. Along with the current automobile industry competition is becoming fierce, the development cycle date of new motorcycle type shortens, and the lead time of mould enterprise is more rigorous on the one hand, and on the other hand the cost of labor constantly increases for traditional mould design can't satisfy the design demand of enterprise already.

Disclosure of Invention

The invention aims to provide an intelligent design method for an automobile mold, which realizes the automatic generation of a mold structure, greatly improves the work efficiency of mold structure design, and greatly reduces the serious dependence on the work experience and skill level of designers.

The invention adopts the following technical scheme to realize the purpose, and the intelligent design method of the automobile mould comprises the following steps:

step 1, inputting a DL process scheme diagram;

step 2, defining the working content of the die related to each procedure according to the input DL process scheme diagram;

step 3, defining each process content in the DL process scheme diagram into a corresponding tool body;

step 4, calling a corresponding function package according to the selected process tool to generate a corresponding working part;

and 5, connecting the generated working parts to form a die structure.

Further, step 1 includes inputting production information and technical standards.

In step 1, the DL process scheme diagram comprises products, process surfaces, process lines and datum line information required by each process; the production information comprises a production press, the length, the width and the height of a die and an installation position; the technical standard comprises rib thickness and standard part selection standard information.

Further, in step 2, the work content includes one or more combinations of drawing, trimming, punching, flanging and shaping.

Further, in step 3, the tool body includes a tool line and a tool profile in the tool body. The specific method for defining each process content in the DL process scheme diagram to the tool line and the tool profile in the corresponding tool body comprises the following steps: if the process content is a drawing process, a parting line, a blank line, a female die profile, a male die profile and a blank holder profile are defined.

Further, in step 4, the function package includes a press function package, a work part function package, and a die carrier function package.

When defining the press function package, firstly matching the press tonnage, the positioning device and the clamping device between the press and the die and the closing height information of the press.

When defining the framework function package, defining a transverse frame in advance, wherein the definition of the transverse frame comprises the following steps: the method comprises the steps of guiding stroke, guiding mode, estimating lifting weight of the die and size information of the die, and establishing a die set virtual mathematical model through a set logical relation to form an entity.

When defining the work component function package, firstly, stroke definition is carried out on each sub-function package of the work component function, a virtual mathematical model is established according to the stroke relation and the set logical relation, functional structure entities to be realized by each sub-function package are generated according to the corresponding generated logical relation through the virtual mathematical model, and the structure entities are constrained and spliced together to form each part of the die.

Further, the generating a logical relationship includes a selectivity logic, a weight logic, and a parameter and location logic.

Further, specific applications of the selective logic include:

for the selection of the wedge, the selection logic conditions comprise:

(1) selecting the type of the wedge according to the working content of the die;

(2) selecting an angle of the wedge according to the stamping direction of the working area of the die;

(3) working force and discharging force required by the area are calculated according to the length of the working edge of the die;

(4) selecting the width of a wedge mounting surface according to the area of a working area of the die;

(5) and when the standard wedge cannot be met, a self-made wedge is adopted.

The method for selecting the wedge type comprises the following steps: the shaping range or the punching angle range of the die product or the stroke range of the wedge forming is recorded as [ a ]₁,a₂]And the punching angle or stroke range of the standard wedge is marked as [ b ]₁,b₂]Then, the similarity of the two ranges is calculated:wherein f is more than or equal to 0 and less than or equal to 1; if f is larger than the set similarity value, selecting a standard wedge; otherwise, selecting a self-made wedge.

Further, the method for selecting the wedge according to the weight logic comprises the following steps:

the typical structural characteristics of the standard wedge are set to be a, and the typical characteristics of the self-made wedge are set to be b; if the number of the typical structural features obtained by judgment in the wedge generating process is c;

if c & ltn & gt a & gt c & ltn & gt b & ltn & gt, selecting a standard wedge;

if c & ltn & gt a & lt c & ltn & gt b & lt, selecting a self-made wedge;

if c ^ n a ═ c ^ n b, then choose the oblique wedge manually.

Further, the specific application of the parameter and position logic includes the determination of the parameter and position logic of the guidance member; the parameters of the guide part comprise the external dimension and the mounting surface dimension, and the position logic of the guide part comprises the absolute dimension position of the guide device on the mould and the relative position from the boundary of the mould.

The method for determining the position logic of the guide part comprises the following steps:

after inputting a die part blank, obtaining the x and y position values of the overall dimension of the die part blank, wherein x is the position dimension of the die part in the length direction, and y is the position dimension of the die part in the width direction;

width direction position W of guide member₁(y + j + k)/3; longitudinal position L of guide member₁＝(x+j+k)*n，n∈[1.1，,1.2](ii) a Wherein j is the empirical value of the die process, k is the product size correction coefficient, and k is y n₁，n₁∈[1.05,1.1]；

Length dimension b of guide member₁＝H*n₂，n₂∈[0.8,0.9]H is the stroke of the blank holder or the material pressing device, and is an integer which is 10 times;

width dimension a of guide member₁＞W₁*n₃，n₃∈[0.4,0.5]。

Further, in step 5, the specific method for connecting the generated working components includes: the working parts are connected by ribs with specified thickness and spacing.

Further, the method also comprises the following steps: and 6, optimizing the generated mould structure by adopting a manual detection mode, wherein the manual detection mode comprises the steps of detecting whether the functional module is lost, whether the associated part is subjected to parametric assembly, whether the type selection of the standard part meets the working requirement, whether the stroke relation is reasonable and whether the part movement is interfered.

The invention adopts an intelligent design method, can automatically generate the die structure according to the input conditions, and avoids huge workload and complicated modification caused by modularized design, thereby greatly improving the working efficiency of die structure design and greatly reducing the serious dependence on the working experience and skill level of designers; meanwhile, when the model structure is modified and adjusted, the final model can be generated only by correspondingly modifying the input condition characteristics and recalculating; is very convenient.

Drawings

FIG. 1 is a block diagram of the process for intelligent design of an automotive mold according to the present invention.

FIG. 2 is a block diagram of a binder function package according to the present invention.

FIG. 3 is a diagram of the logical relationship between the fabric feature package and the component feature package of the present invention.

Detailed Description

The invention relates to an intelligent design method of an automobile mold, which comprises the following steps:

step 1, inputting a DL process scheme diagram;

step 2, defining the working content of the die related to each procedure according to the input DL process scheme diagram;

step 3, defining each process content in the DL process scheme diagram into a corresponding tool body;

step 4, calling a corresponding function package according to the selected process tool to generate a corresponding working part;

and 5, connecting the generated working parts to form a die structure.

Step 1 also includes inputting production information and technical standards.

In step 1, the DL process scheme diagram comprises products, process surfaces, process lines and datum line information required by each process; the production information comprises a production press, the length, the width and the height of a die and an installation position; the technical standard comprises rib thickness and standard part selection standard information.

The working procedure line refers to a parting line, a blank line, a trimming and shaping line and the like related to a die product, the working procedure surface refers to a male die, a female die, a trimming and shaping surface and the like in each working procedure of the die product, and the tool body refers to a working part of the die, such as a characteristic line, a profile and an entity in the male die, the female die, a blank holder and a material pressing device.

In the step 2, the working content comprises one or more combinations of drawing, trimming, punching, flanging and shaping.

In step 3, the tool body comprises a tool line and a tool profile in the tool body. The specific method for defining each process content in the DL process scheme diagram to the tool line and the tool profile in the corresponding tool body comprises the following steps: if the process content is a drawing process, a parting line, a blank line, a female die profile, a male die profile and a blank holder profile are defined.

In step 4, the function package comprises a press function package, a working part function package and a die carrier function package.

When defining the press function package, firstly matching the press tonnage, the positioning device and the clamping device between the press and the die and the closing height information of the press.

When defining the framework function package, defining a transverse frame in advance, wherein the definition of the transverse frame comprises the following steps: the method comprises the steps of guiding stroke, guiding mode, estimating lifting weight of the die and size information of the die, and establishing a die set virtual mathematical model through a set logical relation to form an entity.

When defining the work component function package, firstly, stroke definition is carried out on each sub-function package of the work component function, a virtual mathematical model is established according to the stroke relation and the set logical relation, functional structure entities to be realized by each sub-function package are generated according to the corresponding generated logical relation through the virtual mathematical model, and the structure entities are constrained and spliced together to form each part of the die.

Generating the logical relationship includes selective logic, weight logic, and parameter and location logic.

Specific applications of the selective logic include:

for the selection of the wedge, the selection logic conditions comprise:

(1) selecting the type of the wedge according to the working content of the die;

(2) selecting an angle of the wedge according to the stamping direction of the working area of the die;

(3) working force and discharging force required by the area are calculated according to the length of the working edge of the die;

(4) selecting the width of a wedge mounting surface according to the area of a working area of the die;

(5) and when the standard wedge cannot be met, a self-made wedge is adopted.

The method for selecting the wedge type comprises the following steps: the shaping range or the punching angle range of the die product or the stroke range of the wedge forming is recorded as [ a ]₁,a₂]Punching of standard wedgesThe pressure angle or stroke range is marked as [ b ]₁,b₂]Then, the similarity of the two ranges is calculated:wherein f is more than or equal to 0 and less than or equal to 1; if f is larger than the set similarity value, selecting a standard wedge; otherwise, selecting a self-made wedge.

The method for selecting the wedge according to the weight logic comprises the following steps:

the typical structural characteristics of the standard wedge are set to be a, and the typical characteristics of the self-made wedge are set to be b; if the number of the typical structural features obtained by judgment in the wedge generating process is c;

if c & ltn & gt a & gt c & ltn & gt b & ltn & gt, selecting a standard wedge;

if c & ltn & gt a & lt c & ltn & gt b & lt, selecting a self-made wedge;

if c ^ n a ═ c ^ n b, then choose the oblique wedge manually.

The specific application of the parameter and position logic comprises the determination of the parameter and position logic of the guide part; the parameters of the guide part comprise the external dimension and the mounting surface dimension, and the position logic of the guide part comprises the absolute dimension position of the guide device on the mould and the relative position from the boundary of the mould.

The method for determining the position logic of the guide part comprises the following steps:

after inputting a die part blank, obtaining the x and y position values of the overall dimension of the die part blank, wherein x is the position dimension of the die part in the length direction, and y is the position dimension of the die part in the width direction;

width direction position W of guide member₁(y + j + k)/3; longitudinal position L of guide member₁＝(x+j+k)*n，n∈[1.1，,1.2](ii) a Wherein j is the empirical value of the die process, k is the product size correction coefficient, and k is y n₁，n₁∈[1.05,1.1]；

The guide member height may be determined according to the press stroke and the die closing height.

Length dimension b of guide member₁＝H*n₂，n₂∈[0.8,0.9]H is the stroke of the blank holder or the material pressing device, and is an integer which is 10 times;

width dimension a of guide member₁＞W₁*n₃，n₃∈[0.4,0.5]。

In step 5, the specific method for connecting the generated working components includes: the working parts are connected by ribs with specified thickness and spacing.

The intelligent design method of the automobile mould further comprises the following steps: and 6, optimizing the generated mould structure by adopting a manual detection mode, wherein the manual detection mode comprises the steps of detecting whether the functional module is lost, whether the associated part is subjected to parametric assembly, whether the type selection of the standard part meets the working requirement, whether the stroke relation is reasonable and whether the part movement is interfered.

FIG. 1 is a block diagram of the process of the intelligent design of the automobile mold, in which an engineer inputs a DL chart, production information and technical standards, and then defines the working contents of the mold related to each process, wherein the working contents comprise one or more combinations of drawing, trimming, punching, flanging and shaping;

and defining a process tool in the next step, wherein an engineer defines the work content of the die designed in the process according to the input DL arrangement, wherein the work content can be one of drawing, trimming, punching, flanging and shaping, or the combination of the drawing, trimming, punching, flanging and shaping. And the intelligent system calls a preset process template. The design engineer defines the content of each process in the DL chart into a tool line and a tool profile of a tool body, for example, a parting line, a blank line, a female die profile, a male die profile, a blank holder profile and the like are defined aiming at the drawing process;

and calling the structure function package, calling the required function package (called in a logic library) according to the selected process tool body, wherein the function package is mainly divided into three categories: a press function package, a working part function package and a mould base function package;

when defining a press function package, firstly matching the press tonnage, a positioning device and a clamping device between the press and a die, the closing height of the press and other information of the process;

when defining a working part function package, an engineer firstly defines the stroke of each function package, different process contents comprise different function packages, for example, aiming at trimming and flanging composite dies, the main working function package comprises a blank holder, a male die, a trimming knife block, a flanging insert, a nitrogen spring, a standard wedge, a waste chute and other main structures, and the working part function package of the blank holder comprises the stroke (defined by the engineer), a balance block, a guide frame, a side block, an ejector rod, a guide, a rib, a profile, thickness and the like;

FIG. 2 is a blank holder structure function bag, which comprises a guide function bag, a limit function bag, a mandril function bag and the like; the guide function bag comprises a guide plate and a guide pillar, the limit function bag comprises a limit screw, and the ejector rod function bag comprises an ejector rod cushion block and ejector rod legs;

FIG. 3 is a logic relationship diagram between the structure function package and the component function package of the present invention, wherein the large structure function package is composed of the small structure function packages such as the small structure function package 1 and the small structure function package 2; each small structure function package consists of a component function package 1, a component function package 2, a component function package 3 and other component function packages;

wherein each structure defines a movement stroke in turn according to its working content. The intelligent system establishes a virtual mathematical model according to the stroke relation and the logic relation to establish functional structure entities to be realized by each functional package, and restricts and splices all the parts which form the mould together. When a weight relation which can not be judged by a computer is met, the system stops performing human intervention, and a design engineer temporarily adjusts the weight relation;

when the template function package is defined, an engineer will define the template in advance, and the main contents of the definition include: and the guide stroke and the guide mode are used for estimating the lifting weight of the die, the size of the die and other information. The system establishes a virtual mathematical model of the die carrier through a built-in logical relationship and forms an entity.

Wherein the logical judgment of the generation of the work component feature pack comprises: in the generation of the mold entity, due to the fact that a plurality of structural tools are defined, and certain relative motion forms and position relations exist among different parts, the generated logic relations are mainly divided into three categories, namely selective logic, weight logic, parameters and position logic.

The programming and the program calculation can be realized by programming by utilizing the Boolean operation in VB.

And when the function packet is called for connection, the rib connection is adopted. For example, after the tool bodies of the working components such as a punch, a die, a binder ring and the like are encapsulated on the die carrier, the tool bodies of the working components are connected by using ribs with specified thickness and spacing.

And finally, generating a mould structure, and optimizing the generated mould structure by adopting a manual detection mode, wherein the manual detection comprises the steps of detecting whether the functional module is lost, whether the associated part is subjected to parametric assembly, whether the type selection of the standard part meets the working requirement, whether the stroke relation is reasonable and whether the part movement is interfered.

In conclusion, the invention realizes the automatic generation of the mold structure, greatly improves the work efficiency of the mold structure design, and can obtain the final model only by modifying the corresponding input conditions and carrying out the flow calculation again when modifying the mold, thereby greatly reducing the modification workload and greatly reducing the serious dependence on the working experience and skill level of designers.