CN-115964832-B - Automatic waterway design system of hot stamping die

CN115964832BCN 115964832 BCN115964832 BCN 115964832BCN-115964832-B

Abstract

An automatic waterway design system of a hot stamping die comprises an input module, a waterway design module, a detection module and an output module, wherein the waterway design module determines the number of waterways according to a waterway design knowledge base, judges waterway patterns, sequentially generates a molded surface waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet trough, the detection module calls a minimum distance algorithm to calculate the minimum distance from the molded surface waterway to the molded surface and the minimum distance from the waterway to an insert hole, the waterway which is not required is avoided, the output module outputs a waterway system on a die insert in a working area, and displays a detection report, and a user can change and design the waterway system. According to the invention, the characteristics of the mold insert are automatically analyzed and processed, a molded surface cooling waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet channel are rapidly generated, the problems of experience of a mold designer and dependence on the operation proficiency of CAD software in the design process of the hot stamping mold are solved, and the problems of continuous adjustment, repeated detection and design time length in the waterway design are avoided.

Inventors

ZHOU XIONGHUI
HUANG JIAQIAN

Assignees

上海交通大学

Dates

Publication Date: 20260505
Application Date: 20211011

Claims (8)

1. The automatic waterway design system for the hot stamping die is characterized by comprising an input module, a waterway design module, a detection module and an output module, wherein the input module designs a user interaction interface dialog box according to an interaction interface, and a user performs feature selection and parameter input, and the system reads and integrates the feature selection and parameter input; the water channel design module determines the number of water channels according to a water channel design knowledge base, judges the water channel style, and sequentially generates a molded surface water channel, a longitudinal water inlet/outlet water channel and a water inlet/outlet water channel; The waterway design module comprises a molded surface waterway design unit and an auxiliary mechanism design unit, wherein the molded surface waterway design unit biases boundary lines according to a waterway design knowledge rule base, positions of a first waterway hole, a corner and a last waterway hole on the bias lines are determined, position distribution of waterway center holes is calculated through a Newton iteration method, the number of waterway distribution is determined, the fluctuation degree of an insert molded surface is automatically judged, waterway distribution patterns are determined, single/two/three straight pipelines are respectively generated, the auxiliary mechanism design unit generates longitudinal water inlet/outlet channels at two end surfaces close to the insert mold according to longitudinal waterway rules, and when adjacent cooling waterways overlap longitudinally, one water inlet/outlet channel is shared, and then the water inlet/outlet channels are projected to the bottom surface and stretched to obtain the water inlet/outlet channels.
2. The automatic waterway design system of the hot stamping die, as set forth in claim 1, wherein the input module selects the die insert feature of the current working area, inputs waterway design parameters, stores the parameters in an external data table, and a later user can update the parameters automatically as required, the input module comprises a user interaction interface design unit and a waterway design parameter library unit, wherein the user interaction interface design unit performs interface development by means of Block UI Styler development tools according to the principle of waterway design requirements, an interface dialog box comprises operations required by the user, the die insert feature selection and waterway design parameter input, the waterway design parameters can use system default values, and further comprises a cancel avoidance and cancel sink processing, help document and designer information icon buttons, and increases menu items of a waterway intelligent design system in a menu bar of UG NX 10.0; The mold insert is characterized by comprising a molded surface, an end surface, a bottom surface and a boundary line; The waterway design parameters comprise the diameter of the cooling waterway, the minimum/maximum distance between the waterway and the molded surface, the minimum/maximum distance between the waterway and the side wall, the distance between the waterway and the side wall and the minimum distance between the water tank and the side wall.
3. The automated waterway design system of hot stamping dies of claim 1, wherein the newton iterative method is characterized by uniformly arranging waterway holes between two adjacent waterway holes on the offset curve by iterative loop; The method for automatically judging the fluctuation degree of the profile of the insert comprises the steps of connecting corresponding waterway center holes on two end surfaces, calling a minimum distance algorithm, judging the minimum distance between a connecting line and the profile, if the distance is smaller than zero, indicating that the fluctuation degree of the profile is large, if the distance is larger than the minimum distance from the waterway input by a user to the profile, calling a maximum distance algorithm, if the maximum distance is smaller than the maximum distance from the waterway input by the user to the profile, indicating that the fluctuation degree of the profile is small, otherwise, indicating that the fluctuation degree of the profile is medium; The minimum distance algorithm is that a distance algorithm of a curved surface object is applied, a plurality of points are firstly scattered on a connecting line, a surface needing to be intersected with the curved surface is screened out on the molded surface, then the distance value from the discrete point 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 required distance value is selected as the minimum distance.
4. The automatic waterway design system of the hot stamping die, according to claim 1, is characterized in that the rule for determining the waterway arrangement pattern is that the waterway of the inner surface of the die insert with small fluctuation degree of the molded surface is arranged as a straight pipeline, the waterway of the inner surface of the die insert with medium fluctuation degree of the molded surface is arranged as two straight pipeline in butt joint, and the waterway of the inner surface of the die insert with large fluctuation degree of the molded surface is arranged as three straight pipeline in connection.
5. The automated waterway design system of hot stamping dies of claim 1 or 4, wherein the rule for determining waterway arrangement pattern specifically includes: a) A straight pipeline is arranged, namely a corresponding waterway center hole on two end surfaces is connected to be used as a waterway center line, and the straight pipeline is generated through an API function provided by an NX system according to waterway design parameters of an input module; b) Two straight pipelines are arranged, wherein discrete taking points below the molded surface are taken as middle turning points of the waterway, waterway center holes at two ends are respectively connected to form folding lines, a minimum area judgment method is used on the premise that the minimum distance from the folding lines to the molded surface meets the user requirement, namely the folding lines and the molded surface are selected to form the smallest area as the waterway center line, and then the two straight pipelines are obtained through sweeping; c) And arranging three straight pipelines, namely, the central hole of the water passage is used as a reference plane perpendicular to the profile of the insert, the first derivative mutation point on the intersection line of the central hole and the profile offset surface is calculated, the optimal two first derivative mutation points are selected as the middle turning points of the water passage, the central hole and the middle turning points of the water passage are respectively connected, the three straight pipelines are obtained by sweeping, and the middle straight pipelines extend downwards to the bottom surface of the insert.
6. The automatic waterway design system of the hot stamping die, disclosed in claim 1, is characterized in that the detection module performs waterway distance detection and avoidance processing after the design is completed, the detection module comprises a distance detection unit and a waterway avoidance processing unit, wherein the distance detection unit obtains minimum/maximum distance between a molded surface waterway and a molded surface and minimum distance between the waterway and an insert hole according to a minimum distance algorithm and a maximum distance algorithm, and the waterway avoidance processing unit selects a corresponding avoidance mode according to the distance between the waterway and the insert hole, automatically modifies the waterway and avoids the insert hole.
7. The automatic waterway design system of the hot stamping die, as set forth in claim 1, is characterized in that the output module generates a waterway system and a detection report, the output module comprises an output unit and a waterway change processing unit, wherein the output unit outputs the waterway system on a die insert of a working area in a characteristic form according to a molded surface waterway, a longitudinal waterway and a water inlet and outlet channel obtained by the waterway design module, and displays minimum/maximum distance between the molded surface waterway and the molded surface in a form of an information window, the waterway change processing unit can perform semi-automatic change design, a user interactively selects a waterway center point to be changed and after the waterway change, and the waterway is automatically updated.
8. An automatic waterway design method for a hot stamping die based on the system of any one of claims 1-7 is characterized in that according to waterway design parameters and die insert characteristics obtained through user interaction, the position distribution and corresponding modes of two waterway center holes on two end faces are obtained through calculation, the fluctuation degree of a molded surface is judged according to the principle that a cooling waterway is designed along with the molded surface of the die insert, corresponding molded surface waterways and other auxiliary structures are arranged, and a die cooling waterway system for hot stamping of an automobile B column is designed rapidly.

Description

Automatic waterway design system of hot stamping die 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 the hot stamping die is a core technology of a hot stamping forming process, the existing hot stamping die cooling system is designed by the technology and experience of a die designer, whether the waterway is interfered and the constraint of the maximum and minimum distances between the waterway and the die surface are repeatedly checked, and whether the required cooling effect is achieved is detected by methods such as simulation, so that the arrangement of the waterway is continuously adjusted. In engineering, the time of hot stamping die waterway design often accounts for more than half of the die design working time, the efficiency is quite low, and the accuracy is not high. Disclosure of Invention Aiming at the problems that the existing waterway design is manual and needs to be continuously adjusted and detected in the whole process, the invention provides an automatic waterway design system for a hot stamping die, which can automatically analyze and process the characteristics of die inserts, quickly generate a molded surface cooling waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet channel, solve the problems of depending on experience of a die designer and operation proficiency of CAD software in the hot stamping die design process, and avoid the problems of continuous adjustment, repeated detection and design time length in 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 an input module, a waterway design module, a detection module and an output module, wherein the input module designs a user interaction interface dialog box according to an interaction interface, a user performs feature selection and parameter input, the system reads and integrates, the waterway design module determines waterway number according to a waterway design knowledge base, judges waterway patterns, sequentially generates a molded surface waterway, a longitudinal water inlet/outlet waterway and a water inlet/outlet trough, the detection module invokes a minimum distance algorithm, calculates the minimum distance from the molded surface waterway to the molded surface and the minimum distance from the waterway to an insert hole, performs avoidance processing on waterways which are different in requirements, and the output module outputs a waterway system on an insert of a die in a working area, displays detection reports, and can change the design of the waterway system by the user. The input module selects the characteristics of the die insert in the current working area, inputs waterway design parameters, stores the waterway design parameters in an external data table, and can be updated by a later user according to the needs, and the input module comprises: the system comprises a user interaction interface design unit and a waterway design parameter library unit, wherein the user interaction interface design unit performs interface development by means of Block UI Styler development tools according to the principle of waterway design requirements, an interface dialog box comprises operations required to be performed by a user, mold insert feature selection and waterway design parameter input, the waterway design parameters can use system default values, and further comprises a cancel avoidance, cancel sink treatment, help file and designer information icon buttons, and a menu item of a waterway intelligent design system is added in a menu bar of UG NX 10.0; the waterway design parameter library unit stores parameters input by a user and covers the original default values of the system. The die insert is characterized by comprising a molded surface, an end surface, a bottom surface and a boundary line. The waterway design parameters comprise the diameter of the cooling waterway, the minimum/maximum distance between the waterway and the molded surface, the minimum/maximum distance between the waterway and the side wall, the distance between the waterway and the side wall and the minimum distance between the water tank and the side wall. The waterway design module comprises a molded surface waterway design unit and an auxiliary mechanism design unit, wherein the molded surface waterway design unit biases boundary lines according to a waterway design knowledge rule base, positions of a first waterway hole, a corner and a last waterway hole on the bias lines are determined, position distribution of waterway center holes is calculated through a Newton iteration method, the number of waterway distribution is determined, the fluctuation degree of an insert molded surface is automatically judged, waterway distribution patterns are deter