CN113076703B - Hot stamping die water channel flow velocity analysis method based on database - Google Patents
Hot stamping die water channel flow velocity analysis method based on database Download PDFInfo
- Publication number
- CN113076703B CN113076703B CN202110227577.6A CN202110227577A CN113076703B CN 113076703 B CN113076703 B CN 113076703B CN 202110227577 A CN202110227577 A CN 202110227577A CN 113076703 B CN113076703 B CN 113076703B
- Authority
- CN
- China
- Prior art keywords
- water channel
- flow
- water
- flow rate
- database
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/14—Pipes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Computing Systems (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Algebra (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention relates to the technical field of hot stamping, in particular to a database-based method for analyzing the flow rate of a hot stamping die water channel. A hot stamping die water channel flow velocity analysis method based on a database is characterized in that: the specific method comprises the following steps: s1, establishing a water resistance coefficient database; s2, analyzing the characteristics of the water channel joint; s3, establishing a water channel theoretical equation; s4, calculating the flow rate of the water channel; s5, displaying the flow rate of the water channel; and S6, water channel flow speed and flow requirements under different pressures. Compared with the prior art, the method for analyzing the flow rate of the water channel of the hot stamping die based on the database is provided, the theoretical equation of the cooling system is quickly established, the flow rate of the water channel is solved by adopting the theoretical analysis method, a large amount of analysis time can be saved, and the method plays an important role in the early-stage design optimization of the water channel.
Description
Technical Field
The invention relates to the technical field of hot stamping, in particular to a database-based method for analyzing the flow rate of a water channel of a hot stamping die.
Background
Automobile hot stamping parts generally adopt automatic production line to promote production efficiency, and every stroke frequency includes processes such as feeding, punching press, pressurize cooling, gets the piece, and wherein the pressurize cooling is a quenching process, takes away the heat on sheet material, the mould through the cooling water on the mould. The pressure maintaining and cooling time has decisive effect on the efficiency of the hot stamping part and the material quality after forming. The cooling water channel on the mold is complex, and the flow speed on the cooling water channel has important influence on the uniform cooling and the cooling time of the part.
Due to the complexity of the cooling water channels, the flow velocity on each cooling water channel is difficult to be uniformly distributed, and the theoretical calculation is difficult in the design. Finite element analysis is often used to analyze the flow rate. The method has long pretreatment time and long calculation time, and influences the optimal design of the cooling water channel.
Disclosure of Invention
The invention provides a hot stamping die water channel flow velocity analysis method based on a database, aiming at overcoming the defects of the prior art, quickly establishing a theoretical equation of a cooling system, solving the water channel flow velocity by adopting a theoretical analysis method, saving a large amount of analysis time and playing an important role in the early-stage design optimization of a water channel.
In order to achieve the purpose, the method for analyzing the flow rate of the hot stamping die water channel based on the database is designed, and is characterized in that: the specific method comprises the following steps:
s1, establishing a water resistance coefficient database: respectively establishing parameterized simulation models according to the geometric characteristics of water channel connection, and calculating water resistance coefficients in different connection forms by a simulation method;
s2, analyzing the characteristics of the water channel joint: analyzing the type and parameters of each water channel joint according to the geometric characteristics of the water channel;
s3, establishing a water channel theoretical equation: establishing a theoretical equation of the whole water channel system according to the type and the parameters of the water channel joint analyzed in the step S2;
s4, calculating the flow rate of the water channel: according to the equation in the step S3, the solution of a general linear equation is adopted to calculate the pressure and the flow of each branch water channel under a certain pressure;
s5, displaying the flow rate of the water channel: according to the equation in the step S3, the flow velocity of each water pipe is calculated and is distinguished by different colors;
s6, water channel flow speed and flow requirements under different pressures are as follows: the flow speed requirement on the profile water pipe can be solved by calculating the flow speed and the flow of the water pipe under a plurality of pressures for a plurality of times, and the working pressure and the flow required on the whole water channel can be solved.
In the step S1, the geometrical characteristics of the water channel connection comprise a lower straight pipe, an elbow pipe and a reducer pipe.
In the step S2, the parameters of the water channel joint include the length of the water channel, the diameter of the water channel, the angle of the elbow pipe, and the diameter of the elbow pipe.
In step S3, the theoretical equation of the water channel system is
Wherein p is f (q) is the pressure available from the system, the required flow rate q; f. of z (q) is the relationship between the water resistance characteristic of the straight pipe and the pressure and flow of the circular pipe in unit length; l i The length of each section of linear water pipe is m sections; f. of i (q) is the pressure and flow rate relationship at each linker site, and n linkers are in total.
Compared with the prior art, the invention provides the hot stamping die water channel flow velocity analysis method based on the database, the theoretical equation of the cooling system is quickly established, the theoretical analysis method is adopted to solve the water channel flow velocity, a large amount of analysis time can be saved, and the method plays an important role in the early-stage design optimization of the water channel.
Drawings
FIG. 1 is a logic flow diagram of the present invention.
Fig. 2 is a schematic diagram of an embodiment.
Detailed Description
The invention will be further elucidated on the basis of the drawing.
As shown in fig. 1, a method for analyzing the flow rate of a water channel of a hot stamping die based on a database includes the following steps:
s1, establishing a water resistance coefficient database: according to the geometric characteristics of water channel connection, parametric simulation models are respectively established, and water resistance coefficients under different connection forms are calculated through a simulation method.
As shown in table 1, is a part of the data of the water resistance coefficient database.
TABLE 1
Table 1 shows the relationship between the water resistance pressure and the flow rate in different combinations.
S2, analyzing the characteristics of the water channel joint: analyzing the type and parameters of each water channel joint according to the geometric characteristics of the water channel;
s3, establishing a water channel theoretical equation: establishing a theoretical equation of the whole water channel system according to the type and the parameters of the water channel joint analyzed in the step S2; with reference to the basic criteria: the flow rates are equal when the water pipes are connected in series; on the parallel water channels, the pressure difference is equal;
s4, calculating the flow rate of the water channel: according to the equation in the step S3, the solution of a general linear equation is adopted to calculate the pressure and the flow of each branch water channel under a certain pressure;
s5, displaying the flow rate of the water channel: according to the equation in the step S3, the flow velocity of each water pipe is solved and is distinguished by different colors;
s6, water channel flow speed and flow requirements under different pressures are as follows: the flow speed requirement on the profile water pipe can be solved by calculating the flow speed and the flow of the water pipe under a plurality of pressures for a plurality of times, and the working pressure and the flow required on the whole water channel can be solved.
The problem of uneven flow velocity is found, and the treatment can be carried out in time. The problem of too large a flow rate is found, and the water pipe needs to be redesigned to reduce the flow rate. Because the system traffic is limited.
In the step S1, the geometric characteristics of the water channel connection comprise a lower straight pipe, an elbow pipe and a reducer pipe.
In step S2, parameters of the water channel joint comprise the length of the water channel, the diameter of the water channel, the angle of the elbow and the diameter of the elbow.
In step S3, the theoretical equation of the water channel system is
Wherein p is f (q) is the pressure available in the system, the required flow rate q; f. of z (q) is the relationship between the water resistance characteristic of the straight pipe and the pressure and flow of the circular pipe in unit length; l i The length of each section of linear water pipe is m sections; f. of i (q) is the pressure and flow rate relationship at each linker site, and n linkers are in total.
Example (b):
the key point of the invention is to establish a water resistance system database which comprises the flow characteristics of various pipelines and joints under different pressures.
The method of the invention is illustrated by an analysis of the flow rate of the water supply to a small piece, as shown in figure 2. For complex parts, the same idea is adopted, a more complex model is established, and the flow velocity on each water channel is solved.
In fig. 2, there are 4 straight water pipes, and the pressure and flow rate have the relationship according to the total straight length lz and the unit length: p is a radical of formula z ＝f z (q)*l z . The data are shown in table 2.
TABLE 2
| Connection angle | Inlet pressure (MPa) | Flow rate (m) 3 /h) |
| 10° | 0.01 | 0.370 |
| 15° | 0.01 | 0.372 |
| 20° | 0.01 | 0.375 |
| 25° | 0.01 | 0.376 |
| 85° | 0.01 | 0.452 |
| 90° | 0.01 | 0.469 |
For the single-pass water pipe in fig. 2, the summation of the water resistance pressures in the series is equal to the pressure in the branch. There is the following relationship: p is a radical of f (q)＝f z (q)*l z +f 1 (q)+f 2 (q)+f 3 (q) is carried out. Wherein the water resistance of the straight pipe is f z (q) and Water resistance characteristics f of bent pipe 1 (q)、f 2 (q)f 3 And (q) values can be obtained by directly fitting the data of the water resistance database.
The equation adopts linear step length, and the flow and the pressure of the water path under a certain pressure can be quickly determined.
Claims (3)
1. A hot stamping die water channel flow velocity analysis method based on a database is characterized in that: the specific method comprises the following steps:
s1, establishing a water resistance coefficient database: respectively establishing parameterized simulation models according to the geometric characteristics of water channel connection, and calculating water resistance coefficients in different connection forms by a simulation method;
s2, analyzing the characteristics of the water channel joint: analyzing the type and parameters of each water channel joint according to the geometric characteristics of the water channel;
s3, establishing a water channel theoretical equation: establishing a theoretical equation of the whole water channel system according to the type and the parameters of the water channel joint analyzed in the step S2;
s4, calculating the flow rate of the water channel: according to the equation in the step S3, the solution of a general linear equation is adopted to calculate the pressure and the flow of each branch water channel under a certain pressure;
s5, displaying the flow rate of the water channel: according to the equation in the step S3, the flow velocity of each water pipe is calculated and is distinguished by different colors;
s6, water channel flow speed and flow requirements under different pressures are as follows: the flow speed requirement on the profile water pipe can be solved by calculating the flow speed and the flow of the water pipe under a plurality of pressures for a plurality of times, and the working pressure and the flow required on the whole water channel are solved; in step S3, the theoretical equation of the water channel system is
Wherein, in the step (A),
indicating the pressure that the system can provide at the desired flow rate q;
the characteristic of straight pipe water resistance is shown, and the relation between the pressure and the flow of a circular pipe with unit length is shown;
the length of each section of linear water pipe is m sections;
the pressure and flow rate relationship at each joint site was found to be n joints in total.
2. The database-based method for analyzing the flow rate of the water channel of the hot stamping die according to claim 1, wherein the method comprises the following steps: in the step S1, the geometrical characteristics of the water channel connection comprise a lower straight pipe, an elbow pipe and a reducer pipe.
3. The database-based method for analyzing the flow rate of the water channel of the hot stamping die according to claim 1, wherein the method comprises the following steps: in the step S2, the parameters of the water channel joint include the length of the water channel, the diameter of the water channel, the angle of the elbow pipe, and the diameter of the elbow pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227577.6A CN113076703B (en) | 2021-03-02 | 2021-03-02 | Hot stamping die water channel flow velocity analysis method based on database |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227577.6A CN113076703B (en) | 2021-03-02 | 2021-03-02 | Hot stamping die water channel flow velocity analysis method based on database |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113076703A CN113076703A (en) | 2021-07-06 |
| CN113076703B true CN113076703B (en) | 2022-10-28 |
Family
ID=76609795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110227577.6A Active CN113076703B (en) | 2021-03-02 | 2021-03-02 | Hot stamping die water channel flow velocity analysis method based on database |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113076703B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111159873A (en) * | 2019-12-25 | 2020-05-15 | 浙江博汇汽车部件有限公司 | Method for calculating working flow of each cavity of thermal forming die |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2771196B2 (en) * | 1988-10-31 | 1998-07-02 | 株式会社日立製作所 | Prediction method of pressure loss in mold and mold flow path design method using the same |
| WO2011028818A2 (en) * | 2009-09-01 | 2011-03-10 | Trustees Of Boston University | High throughput multichannel reader and uses thereof |
| US10684078B1 (en) * | 2019-05-24 | 2020-06-16 | Macrae Technologies, Inc. | Method for stabilizing thermal conduction of block coolers with cast-in coolant pipes |
| CN109047522B (en) * | 2018-08-22 | 2020-04-07 | 上海博汇模具有限公司 | Method for adjusting flow velocity uniformity of profile of hot forming die |
-
2021
- 2021-03-02 CN CN202110227577.6A patent/CN113076703B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111159873A (en) * | 2019-12-25 | 2020-05-15 | 浙江博汇汽车部件有限公司 | Method for calculating working flow of each cavity of thermal forming die |
Non-Patent Citations (1)
| Title |
|---|
| 高强度钢热成型模具冷却水道的设计及传热效果研究;万雨娴;《中国优秀硕士学位论文全文数据库 (工程科技Ⅰ辑)》;20190131;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113076703A (en) | 2021-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110750931B (en) | Efficient profile extrusion die design method | |
| CN109047522B (en) | Method for adjusting flow velocity uniformity of profile of hot forming die | |
| CN102284669A (en) | Precise forming process of flange shaft | |
| CN113076703B (en) | Hot stamping die water channel flow velocity analysis method based on database | |
| CN208245631U (en) | A kind of mold recycles cooling system | |
| CN104439164B (en) | Bottom die water spot cooling device used for hub casting and method for cooling bottom die | |
| CN107622145B (en) | Method for homogenizing flow velocity of profile water pipe of thermoforming mold | |
| CN108758142B (en) | Main pipe reducing tee joint and production process thereof | |
| CN208542829U (en) | A kind of cooling system obtaining a variety of intensity drop stamping parts | |
| CN108435919A (en) | A kind of method and cooling system obtaining a variety of intensity drop stamping parts | |
| CN105057389A (en) | Method for directly extruding seamless tube by middle-chromium austenitic stainless steel continuous casting round billet | |
| CN111159873B (en) | Method for calculating working flow of each cavity of thermal forming die | |
| CN212310464U (en) | Forming device for cold extruding multi-hole small-caliber branch pipe orifice on thick-wall large-caliber pipe fitting | |
| CN204263340U (en) | The punching block that III molded cannula installed by rod member located rod member and utilizes nylon to locate by a kind of nylon | |
| CN103990657A (en) | Forming method of 90-degree straight-section upsetting thickening elbow | |
| CN107052125A (en) | A kind of tap body building mortion and the method that tap body is shaped with it | |
| CN103752661B (en) | A kind of long strip special-shaped material roll-forming method | |
| CN209869279U (en) | Metal 3D prints base plate grafting mould | |
| CN204338699U (en) | A kind of stainless steel coated precise punching die | |
| CN113076702A (en) | Method for calculating equivalent water resistance of cooling water channel of thermal forming die | |
| CN201950099U (en) | Flat tube processor for heat exchanger | |
| CN112620468A (en) | Seamless taper pipe production device | |
| CN201534182U (en) | Extrusion forming die of reducing trouser-shaped tee | |
| CN207787463U (en) | A kind of novel pipe part hot forming tool | |
| CN112906276B (en) | Die profile temperature analysis method based on database |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |