CN115964832A - Automatic water route design system of hot stamping die - Google Patents
Automatic water route design system of hot stamping die Download PDFInfo
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Abstract
An automated waterway design system for a hot stamping die, comprising: the water path design module determines the number of water paths according to a water path design knowledge base, judges the water path patterns and sequentially generates a profile water path, a longitudinal water inlet/outlet path and a water inlet/outlet groove; the detection module calls a minimum distance algorithm to calculate the minimum distance from the waterway of the molded surface to the molded surface and the minimum distance from the waterway to the insert hole, and avoids the waterway which does not meet the requirement; the output module outputs the waterway system on the die insert block of the working area, and displays a detection report, so that a user can change the design of the waterway system. The invention automatically analyzes and processes the characteristics of the die insert, quickly generates the molded surface cooling water path, the longitudinal water inlet/outlet path and the water inlet/outlet groove, solves the problem of dependence on the experience of a die designer and the operation proficiency of CAD software in the design process of the hot stamping die, and avoids the problems of continuous adjustment, repeated detection and long time of design work in the water path design.
Description
Technical Field
The invention relates to a technology in the field of hot stamping dies, in particular to an automatic waterway design system of a hot stamping die.
Background
The design of a hot stamping die is a core technology of a hot stamping forming process, a cooling system of the existing hot stamping die is designed by the technology and experience of a die designer, usually, whether a water channel interferes or not and the maximum and minimum distance constraints from the water channel to a die profile need to be checked repeatedly, and then, whether the required cooling effect is achieved or not is detected by methods such as simulation and the like, so that the arrangement of the water channel is adjusted continuously. In engineering, the time of designing the water channel of the hot stamping die usually accounts for more than half of the working time of die design, the efficiency is very low, and the accuracy is not high.
Disclosure of Invention
The invention provides an automatic waterway design system of a hot stamping die, aiming at the problems that the existing waterway design is manual and needs to be adjusted and detected continuously in the whole process, which can automatically analyze and process the characteristics of a die insert, quickly generate a profile cooling waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet groove, solve the problem of dependence on the experience of a die designer and the operation proficiency of CAD software in the design process of the hot stamping die and avoid the problems of continuous adjustment, repeated detection and long time of design work in the waterway design.
The invention is realized by the following technical scheme:
the invention relates to an automatic waterway design system of a hot stamping die, which comprises: input module, water route design module, detection module and output module, wherein: the input module designs a user interactive interface dialog box according to the interactive interface, the user selects the characteristics and inputs the parameters, and the system reads and integrates the characteristics and the parameters; the waterway design module determines the number of waterways according to a waterway design knowledge base, judges waterway patterns and sequentially generates a profile waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet channel; the detection module calls a minimum distance algorithm to calculate the minimum distance from the profile waterway to the profile and the minimum distance from the waterway to the insert hole, and avoids the waterway which does not meet the requirement; the output module outputs the waterway system on the die insert block of the working area, and displays a detection report, so that a user can change the design of the waterway system.
The input module select the characteristics of the die insert of the current working area, input waterway design parameters, store in an external data sheet, and later-stage users can update themselves according to needs, and the input module comprises: user interface design unit and water route design parameter storehouse unit, wherein: the user interactive interface design unit carries out interface development by means of a Block UI Styler development tool according to the principle required by waterway design, an interface dialog box comprises the operation required by a user, the characteristic selection of a die insert and the input of waterway design parameters, wherein the waterway design parameters can use system default values, avoidance cancellation and water tank cancellation processing, a help document and designer information icon button are also included, and a 'waterway intelligent design system' menu item is added in a UG NX10.0 menu bar; the waterway design parameter library unit stores parameters input by a user and covers the original default value of the system.
The die insert features include: profile, end face, bottom face, boundary line.
The waterway design parameters comprise: the cooling water path diameter, the minimum/maximum distance between the water path and the molded surface, the distance between the water path and the side wall, the avoiding distance of the water path and the minimum distance between the water tank and the side wall.
The waterway design module comprises: profile water route design unit and complementary unit design unit, wherein: the profile waterway design unit biases the boundary line according to a waterway design knowledge rule base, determines the first waterway hole, the corner and the last waterway hole on the bias line, calculates the position distribution of the central holes of the waterway by a Newton iteration method, determines the arrangement number of the waterways in a corresponding mode, automatically judges the profile fluctuation degree of the insert, determines the arrangement pattern of the waterway, and respectively generates a single straight pipeline, two straight pipelines and three straight pipelines; and the auxiliary mechanism design unit generates longitudinal water inlet/outlet paths at the positions close to two end faces of the die insert according to the longitudinal water path rule, and when adjacent cooling water paths are overlapped in the longitudinal direction, one water inlet/outlet path is shared, and then the water inlet/outlet paths are projected to the bottom surface and stretched to obtain a water inlet/outlet channel.
According to the Newton iteration method, waterway holes are uniformly distributed between two adjacent waterway holes on the offset curve through iteration and circulation.
The method for automatically judging the undulation degree of the profile surface of the insert comprises the following steps: connecting corresponding waterway center holes on the two end surfaces, calling a minimum distance algorithm, and judging the minimum distance between the connecting line and the molded surface, wherein if the distance is less than zero, the molded surface is large in undulation; if the distance is greater than the minimum distance from the waterway input by the user to the profile, calling a maximum distance algorithm, and if the maximum distance is less than the maximum distance from the waterway input by the user to the profile, indicating that the profile fluctuation degree is small; others indicate moderate profile relief.
The minimum distance algorithm is characterized in that a distance algorithm of a curved surface object is used, a plurality of points are firstly discretely taken on a connecting line, a surface needing to be intersected with the connecting line is screened out on the molded surface, then a distance value from a discrete point to the molded surface of an insert is solved through an API function UF _ MODL _ ask _ minimum _ dist provided by an NX system, all discrete points are traversed, and the minimum value in the solved distance values is selected as the minimum distance.
The maximum distance algorithm principle is similar to the minimum distance algorithm, except that the maximum value is selected as the maximum distance from all the distance values from the discrete points to the insert profile.
The rule for determining the waterway arrangement pattern is as follows: the water path of the inner profile of the die insert with small profile undulation degree is provided with a straight pipeline; the water way of the inner profile of the die insert with medium profile undulation degree is set as two straight pipelines which are butted; the die insert inner profile water path with large profile fluctuation is connected by three straight pipelines, and specifically comprises the following steps:
a) Arranging a straight pipeline: connecting the water route centre bore that corresponds on the both ends face and regard as the water route central line, according to the water route design parameter of input module, through the API function generation that the NX system provided a straight pipeline.
b) Two straight pipelines are arranged: discrete points are taken from the lower part of the molded surface and are used as middle turning points of the water path, the water path central holes at two ends are respectively connected to form broken lines, on the premise that the minimum distance from the broken lines to the molded surface meets the requirements of users, a minimum area judgment method is used, namely, the smallest area formed by the broken lines and the molded surface is selected to be used as the water path central line, and then two straight pipelines are obtained through sweeping.
c) Arranging three straight pipelines: and taking a central hole of the waterway as a reference plane vertical to the profile of the insert, calculating a first-order derivative catastrophe point on the intersection line of the central hole of the waterway and the offset plane of the profile, selecting two optimal middle turning points as the waterway, respectively connecting the central hole of the waterway and the middle turning points, sweeping to obtain three straight pipelines, and extending the middle straight pipelines downwards to the bottom surface of the insert.
The detection module carries out waterway distance detection and avoidance processing after the design is completed, and the detection module comprises: apart from detecting element and processing unit is dodged to the water route, wherein: the distance detection unit calculates the minimum/maximum distance between the molded surface water channel and the molded surface and the minimum distance between the water channel and the insert hole according to the minimum distance algorithm and the maximum distance algorithm; the waterway avoidance processing unit selects a corresponding avoidance mode according to the distance between the waterway and the block hole, and automatically modifies the waterway to avoid the block hole.
The output module generates a waterway system and a detection report, and comprises: output unit and water route change processing unit, wherein: the output unit outputs a waterway system in a characteristic mode on the die insert block of the working area according to the molded surface waterway, the longitudinal waterway and the water inlet and outlet grooves obtained by the waterway design module, and displays the minimum/maximum distance between the molded surface waterway and the molded surface in an information window mode; the waterway change processing unit can perform semi-automatic change design, and the central point of the waterway which needs to be changed and is changed is interactively selected by a user, so that the waterway is automatically updated by the system.
The invention relates to a hot stamping die automatic waterway design method based on the system, according to waterway design parameters and die insert characteristics obtained by user interaction, the position distribution and the corresponding mode of central holes of two waterways on two end surfaces are obtained by calculation, the profile fluctuation degree is judged according to the principle that a cooling waterway is designed along with the profile of a die insert, corresponding profile waterways and other auxiliary structures are arranged, and a die cooling waterway system for automobile B-pillar hot stamping is quickly designed.
Technical effects
According to the invention, by integrating the waterway design rule base, based on waterway design parameter constraint, and replacing manual design work through an automatic system, the molded surface waterway, the longitudinal water inlet/outlet waterway and the water inlet/outlet channel are automatically generated, the fluctuation degree of the molded surface can be automatically judged, the waterway arrangement pattern is determined, and a minimum area judgment method is designed, so that the molded surface waterway arranged along with the molded surface of the die insert as much as possible is obtained, and the cooling uniformity is favorably improved. Compared with the prior art, the method reduces the dependence on the design experience of a mold designer and the use proficiency of CAD software, and greatly shortens the design working hour.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of a mold surface cooling water path at the end face of a mold insert, a longitudinal water inlet path and a water inlet channel communicated with each other;
FIG. 3 is a schematic view showing the arrangement of a cooling water path, a longitudinal water inlet/outlet path, and a water inlet/outlet channel of a mold insert when the relief degree of the mold surface of the mold insert is small;
FIG. 4 is a schematic diagram showing the arrangement of a profile cooling water path, a longitudinal water inlet/outlet path, and a water inlet/outlet channel when the profile of the die insert is moderate;
FIG. 5 is a schematic view showing the arrangement of a cooling water path, a longitudinal water inlet/outlet path, and a water inlet/outlet channel of a mold insert when the profile of the mold insert has a large undulation degree;
in the figure: the insert molding structure comprises an insert boundary line 1, a cooling water channel hole 2, an insert molding end face 3, a longitudinal water inlet channel 4, a water inlet channel 5, an overlapped longitudinal water inlet/outlet channel 6, a plug hole 7, an insert molding face 8, a molding face cooling water channel 9, a longitudinal water outlet channel 10, a water outlet channel 11 and an intermediate cooling water channel 12.
Detailed Description
As shown in fig. 1, the waterway design system framework for the hot stamping die according to the present embodiment includes: input, water route design, detection and output module, wherein: the input module designs a user interactive interface dialog box according to the interactive interface, the user selects the characteristics and inputs the parameters, and the system reads and integrates the characteristics and the parameters; the waterway design module determines the number of waterways according to a waterway design knowledge base, judges waterway patterns and sequentially generates a molded waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet channel; the detection module calls a minimum distance algorithm to calculate the minimum distance from the molded surface waterway to the molded surface, the minimum distance from the waterway to the insert hole and the like, and avoidance processing is carried out on the waterway which does not meet the requirements; the output module outputs the waterway system on the die insert block of the working area, and displays a detection report, so that a user can change the design of the waterway system.
As shown in fig. 2, by offsetting the insert boundary line 1, the system can automatically calculate the position distribution and the corresponding mode of the cooling water passage holes 2 on the insert end surface 3, and preliminarily determine the arrangement number of the water passages; and then automatically judging the water path arrangement pattern to be a single/two/three straight pipeline according to the fluctuation degree of the molded surface.
As shown in fig. 3, when the degree of profile undulation is small, a single straight pipe is arranged. At this time, the water path arrangement algorithm idea is as follows: connecting the corresponding water route centre bore on both ends face and regard as the water route central line, according to the water route design parameter of input module, through the API function formation straight pipeline that the NX system provided as profile cooling water route 9, the both ends head in water route uses the stifled hole 7 sealed.
And then calling an auxiliary mechanism design unit, and generating a longitudinal water inlet channel 4 and a longitudinal water outlet channel 10 according to the generated molded surface cooling water channel 9 and geometric constraint conditions such as the distance between the longitudinal water inlet/outlet channel and the side wall. As shown in fig. 2, when adjacent cooling water paths overlap in the longitudinal direction, one longitudinal water inlet/outlet path 6 may be shared. And then projecting a longitudinal water inlet/outlet path port to the bottom surface of the insert, solving a minimum envelope curve of a projection part, and stretching to obtain a water inlet groove 5 and a water outlet groove 11. The automatic design scheme of the auxiliary mechanisms such as the longitudinal water inlet/outlet channel, the water inlet/outlet groove and the like is also suitable for other die inserts, and detailed description will not be provided in time for later reference.
As shown in fig. 4, when the profile is moderate in degree, two straight pipes are arranged. At this time, the water path arrangement algorithm idea is as follows: discrete points are taken below the insert molded surface 8 to serve as middle turning points of the water path, water path central holes connected with two ends respectively form broken lines, on the premise that the minimum distance from the broken lines to the molded surface meets the requirements of users, a minimum area judgment method is used, namely, the smallest area enclosed by the broken lines and the molded surface is selected to serve as the water path central line, then two straight pipelines are obtained through sweeping to serve as the molded surface cooling water path 9, and the heads of two ends of the water path are sealed through plug holes 7.
As shown in fig. 5, when the profile undulation is large, three straight pipes are arranged. At this time, the water path arrangement algorithm idea is as follows: the supercooling waterway hole is used as a reference plane perpendicular to the insert molded surface 18, a first derivative catastrophe point on the intersection line of the supercooling waterway hole and the molded surface offset surface is calculated, two optimal middle turning points of the waterway are selected and respectively connected with a waterway center hole and the middle turning points, three straight pipelines are obtained by sweeping, the middle straight pipelines are extended downwards to the bottom surface of the insert, and both ends of the molded waterway and the lower end of the middle pipelines are plugged by plug holes 21.
The detection module automatically detects the minimum/maximum distance between the waterway and the molded surface and the minimum distance between the waterway of the molded surface and the insert hole after the waterway design module is completed, and the waterway problem caused by the insert hole or other special-shaped characteristics is solved.
And the output module automatically generates a corresponding profile water path, a longitudinal water inlet/outlet path and a water inlet/outlet groove on the die insert after the water path is designed and detected, generates a detection report, displays the maximum/minimum distance from the water path to the profile of the die insert, and marks the water path required to be adjusted. In addition, the design can be changed, the user interactively selects the central point of the waterway which needs to be changed and is changed, and the waterway which is changed is automatically updated.
As shown in fig. 2 to 5, the arrows indicate the direction of the water flow in the cooling water path.
The waterway design system of the hot stamping die is embedded into NX UG 10.0 software in the form of an insert, and the using mode of the waterway design system is the same as the function of the NX UG system.
Through specific practical experiments, under a modeling environment, a menu item of a 'waterway intelligent design system' is opened on a menu bar to operate the system, mold insert characteristics such as a molded surface, an end surface, a bottom surface and a boundary line are selected, waterway design parameters such as waterway diameter 8mm, minimum distance between a waterway and the molded surface 8mm and waterway interval 8mm are input, a 'waterway automatic design' button is selected, a program is automatically performed, a molded surface waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet waterway are sequentially generated, a message frame is popped up, the minimum/maximum distance between each molded surface waterway and the molded surface is listed, wherein the 'needing to be adjusted' can be displayed if the distance does not meet the requirement, and the corresponding molded surface waterway is red. The whole program calculation process is about 30 s-3 min according to the complexity of the molded surfaces of different die inserts. And then calling a design change unit to correspondingly modify the waterway needing to be adjusted. The modified waterway insert is subjected to finite element simulation and compared with an insert without a cooling waterway, the highest temperature at the fillet of the waterway insert is found to be reduced, the temperature distribution of the die surface is more uniform, and the method is more favorable for enabling the plate to achieve sufficient strength and hardness distribution in actual production.
Compared with the prior art, the system carries out secondary development through an external interface provided by UG NX, realizes automatic arrangement of a profile water path, a longitudinal water inlet/outlet path and a water inlet/outlet groove, automatically carries out insert hole position avoidance processing, simplifies tedious and complex manual design work of a cooling water path of a hot stamping die, reduces human misoperation and experience dependence, and improves design accuracy and work efficiency.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The utility model provides an automatic water route design system of hot stamping die which characterized in that includes: input module, water route design module, detection module and output module, wherein: the input module designs a user interactive interface dialog box according to the interactive interface, the user selects the characteristics and inputs the parameters, and the system reads and integrates the characteristics and the parameters; the waterway design module determines the number of waterways according to a waterway design knowledge base, judges waterway patterns and sequentially generates a profile waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet channel; the detection module calls a minimum distance algorithm to calculate the minimum distance from the profile waterway to the profile and the minimum distance from the waterway to the insert hole, and avoids the waterway which does not meet the requirement; the output module outputs the waterway system on the die insert block of the working area, and displays a detection report, so that a user can change the design of the waterway system.
2. The automated waterway design system of claim 1, wherein the input module selects the current working area die insert features, inputs waterway design parameters, stores the waterway design parameters in an external data table, and can be updated by a user at a later stage as required, the input module comprising: user interaction interface design unit and water route design parameter storehouse unit, wherein: the user interactive interface design unit carries out interface development by means of a Block UI Styler development tool according to the principle required by waterway design, an interface dialog box comprises the operation required by a user, the characteristic selection of a die insert and the input of waterway design parameters, wherein the waterway design parameters can use system default values, avoidance cancellation and water tank cancellation processing, a help document and designer information icon button are also included, and a 'waterway intelligent design system' menu item is added in a UG NX10.0 menu bar; the waterway design parameter library unit stores parameters input by a user and covers the original default value of the system;
the die insert features include: profile, end face, bottom face, boundary line;
the waterway design parameters comprise: the cooling water path diameter, the minimum/maximum distance between the water path and the molded surface, the distance between the water path and the side wall, the avoiding distance of the water path and the minimum distance between the water tank and the side wall.
3. The automated waterway design system of claim 1, wherein the waterway design module comprises: profile water route design unit and complementary unit design unit, wherein: the profile waterway design unit offsets the boundary line according to a waterway design knowledge rule base, determines a first waterway hole, a corner and a last waterway hole on the offset line, calculates the position distribution of the waterway center holes by a Newton iteration method and a corresponding mode, determines the arrangement number of the waterways, automatically judges the fluctuation degree of the insert profile, determines the arrangement pattern of the waterway, and respectively generates a single/two/three straight pipelines; and the auxiliary mechanism design unit generates longitudinal water inlet/outlet paths at the positions close to two end faces of the die insert according to the longitudinal water path rule, and when adjacent cooling water paths are overlapped in the longitudinal direction, one water inlet/outlet path is shared, and then the water inlet/outlet paths are projected to the bottom surface and stretched to obtain a water inlet/outlet channel.
4. The automated waterway design system of the hot stamping die of claim 3, wherein the newton iteration method is to evenly arrange waterway holes between two neighboring waterway holes on the offset curve by iteration and cycle;
the method for automatically judging the undulation degree of the insert profile comprises the following steps: connecting corresponding waterway center holes on the two end surfaces, calling a minimum distance algorithm, and judging the minimum distance between the connecting line and the molded surface, wherein if the distance is less than zero, the molded surface is large in undulation; if the distance is greater than the minimum distance from the waterway input by the user to the molded surface, calling a maximum distance algorithm, and if the maximum distance is less than the maximum distance from the waterway input by the user to the molded surface, explaining that the molded surface undulation degree is small; the others indicate moderate profile undulation;
the minimum distance algorithm is characterized in that a distance algorithm of a curved surface object is used, a plurality of points are firstly discretely taken on a connecting line, a surface needing to be intersected with the points is screened out on the molded surface, then a distance value from the discrete points to the molded surface of the insert is solved through an API function UF _ MODL _ ask _ minimum _ dist provided by an NX system, all the discrete points are traversed, and the minimum value in the solved distance values is selected as the minimum distance.
5. The automated waterway design system of claim 1, wherein the rules for determining the waterway arrangement pattern are as follows: the water path of the inner profile of the die insert with small profile undulation degree is provided with a straight pipeline; the water way of the inner profile of the die insert with medium profile undulation degree is set as two straight pipelines which are butted; the water path of the inner profile of the die insert with large profile undulation is connected by three straight pipelines.
6. The automatic waterway design system of the hot stamping die of claim 1 or 5, wherein the rule for determining the waterway arrangement pattern specifically comprises:
a) Arranging a straight pipeline: connecting corresponding waterway center holes on two end faces as waterway center lines, and generating a straight pipeline through an API function provided by an NX system according to the waterway design parameters of the input module;
b) Two straight pipelines are arranged: discrete points are taken as middle turning points of the water paths below the molded surface, the water path central holes at two ends are respectively connected to form broken lines, on the premise that the minimum distance from the broken lines to the molded surface meets the requirements of users, a minimum area judgment method is used, namely, the smallest area formed by the broken lines and the molded surface is selected as the water path central line, and then two straight pipelines are obtained through sweeping;
c) Arranging three straight pipelines: and a central hole of the water channel is taken as a reference plane vertical to the molded surface of the insert, a first derivative catastrophe point on the intersection line of the central hole and the molded surface offset plane is calculated, two optimal middle turning points of the water channel are selected and respectively connected with the central hole of the water channel and the middle turning points, three straight pipelines are obtained by sweeping, and the middle straight pipelines are extended downwards to the bottom surface of the insert.
7. The automated waterway design system of claim 1, wherein the detection module performs waterway distance detection and avoidance after the design is completed, and the detection module comprises: apart from detecting element and processing unit is dodged to water route, wherein: the distance detection unit calculates the minimum/maximum distance between the molded surface water channel and the molded surface and the minimum distance between the water channel and the insert hole according to the minimum distance algorithm and the maximum distance algorithm; the waterway avoidance processing unit selects a corresponding avoidance mode according to the distance between the waterway and the block hole, and automatically modifies the waterway to avoid the block hole.
8. The automated waterway design system of claim 1, wherein the output module generates the waterway system and the detection report, the output module comprising: output unit and water route change processing unit, wherein: the output unit outputs a waterway system in a characteristic mode on the die insert of the working area according to the molded surface waterway, the longitudinal waterway and the water inlet and outlet grooves obtained by the waterway design module, and displays the minimum/maximum distance between the molded surface waterway and the molded surface in an information window mode; the waterway change processing unit can perform semi-automatic change design, and the central point of the waterway which needs to be changed and is changed is interactively selected by a user, so that the waterway is automatically updated by the system.
9. An automatic waterway design method for a hot stamping die based on the system of any one of claims 1 to 8 is characterized in that according to waterway design parameters and die insert characteristics obtained by user interaction, the position distribution and the corresponding mode of central holes of two waterways on two end faces are obtained through calculation, the profile fluctuation degree is judged according to the principle that a cooling waterway is designed along with the profile of a die insert, corresponding profile waterways and other auxiliary structures are arranged, and a die cooling waterway system for the hot stamping of an automobile B column is rapidly designed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116834242A (en) * | 2023-09-01 | 2023-10-03 | 青岛海泰科模具有限公司 | Method for generating flow path line of cooling waterway of injection mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116834242A (en) * | 2023-09-01 | 2023-10-03 | 青岛海泰科模具有限公司 | Method for generating flow path line of cooling waterway of injection mold |
| CN116834242B (en) * | 2023-09-01 | 2023-11-21 | 青岛海泰科模具有限公司 | Method for generating flow path line of cooling waterway of injection mold |
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