Thinkdesign die design in the automotive application
With the fierce competition, the speed of automobile products to speed up the replacement, the corresponding request to shorten the die mold industry development cycle, today, with high strength steel, aluminum alloy and composite materials, such as the complexity of the application of new materials, springback in sheet metal forming is common defects in the process of seriously affected the development cycle of the mold.
manufacturing has been providing total solutions and professional services companies, acquired in 2008 the Italian company think3 technology, automotive tooling industry for the introduction of the resilience of the world's leading solutions-ThinkDesign.
Springback compensation ThinkDesign to achieve the automation of the process, can maintain the quality of the original surface of the mold surface modification, thus greatly reducing the mold design engineers time to amend the model to reduce the number of mold test mold, which greatly improved the die design capacity and reduce the mold design and manufacturing costs, to help customers stay ahead.
ThinkDesign as early as in 1979, was born in Europe, after nearly three decades of development, it has helped 10,000 companies worldwide to solve the design problems in production, in China's automotive industry also has a large number of die user. In this paper, the user's actual cases to illustrate ThinkDesign die design in the automotive application.
Second, interactive modeling (ISM) technology in the fast-fill holes on the application of surface
ISM provides a flexible and a revolutionary modeling tool allows users to directly modify the parameters of ThinkDesign model to build or import of non-parameter model, the use of the process of users do not have to consider the creation of model parameters and characteristics of the order.
Mold surface in the automotive design, we first need the product surface to fill up the holes. ISM provides a fast way to fill the holes, as shown in Figure 2-1, the command has the following characteristics:
★ automatically detects the need to fill the holes.
★ hole can be located at the border more than one surface.
★ fill hole surface and the boundary surface to maintain the same connections.
★ can choose more than fill a hole for the establishment of the characteristics.
Figure 2-1 ISM rapid filling holes
Third, GSM (Global Shape Modeling) technology at the mold surface modification on the application of
GSM for Engineers provides an easy-to-use, high-level modeling of innovative ways! It is the only stage in the design of any model of precise and fast tool to create and modify, we can be local or global scope in the application of the technology. The following two specific examples to illustrate the functional GSM-type surface in the mold design and application modifications.
Modify the use of GSM features 3.1-breaking surface
TD to provide not only a IGS, STEP, STL, such as reading and writing in support of a common format, but also for CATIA, UG, Proe, such as software, also provides a direct interface to read and write. Of course, in the design process, we can not avoid the problem of bad side.
Figure 3-1 Automatic edge detection, opening up
Figure 3-1 is open ThinkDesign automatic edge detection tools, we can use GSM features of its rapid changes to its command set, follow these steps (see Figure 3-2 order):
1) Select the object need to be amended, modified objects can be point, line, surface, solid, grid.
2) Select the border need to retain the definition of its connection with the relationship between adjacent surfaces (G0, G1, G2).
3) Select the group to match the corresponding object, the object can be a match point, line or interactive mode.
Figure 3-2 GSM function changes rapidly broken surface
Modify the use of GSM features 3.2 rebound
Figure 3-3 is a model of the roof, at the top of different departments for the A surface, material for the ST14, material thickness 0.7mm. Test mode in the process of resilience is found, the product model needs to do the changes as shown in Figure 3-3, the use of other software need to remove the surface after the re-build, time-consuming and laborious process, using the following ThinkDesign to complete two tasks need to be amended .
Figure 3-3 car roof
Task: at the top of the modified surface
Amend the order as shown in Figure 3-4, while maintaining continuity with the border, the interactive point of pulling up the top of the mobile 2mm. Modify the results of Figure 3-5, to ensure that the original A side in the case of the surface and do the elastic deformation.
Figure 3-4 to amend the mandate of a
Figure 3-5 changes to the results of a task
Task two: the left side of the modified surface
Surface in the mold design often need to mock or trial in accordance with the outcome of the edge of a mold to a certain point of view of compensation, it is very difficult in the past one thing, and even sometimes have to re-mold surface of the building, however the use of GSM ridge can easily reverse the order of the reverse surface of a mold edge. Amend the order as shown in Figure 3-6, the command has the following characteristics:
★ connections to maintain surface.
★ reverse automatically generated in accordance with section ridge, to reverse the cross-section may vary.
★ can be defined in various sections of the reverse angle reverse.
Figure 3-6 to amend the mandate of the Second
Figure 3-7 changes to the results of the second task
Fourth, automatic springback compensation (Compensator) treatment in the application of resilience
Typically, enterprises or CAE test mode to prevent rebound of two ways, both methods are time-consuming and laborious, there is a problem, and that is how fast or CAE based on test data mode to modify the mold surface.
Compensator is based on the GSM technology used for springback compensation in sheet metal CAD tools, it provides the above-mentioned two types of solution to the problem, which has the following advantages:
★ springback compensation it can automate the process to achieve significant savings in tooling surface modification time.
★ revised the original surface and surface to maintain the same surface structure and surface extension the quality of fill.
★ do not need to reverse the process of
Compensator adopted the following two examples will be that solution.
4.1 the use of physical verification resilience Law
Physical verification method is based on measurement of physical data to modify the 3D model, Compensator of the processing steps are as follows:
1) Coordinate measuring instrument or measuring instrument to obtain white light on the physical data, in accordance with an order ThinkDesign alignment of the alignment and the 3D point cloud surface.
Figure 4-1 point cloud and surface alignment
2) ThinkDesign will point cloud and 3D Surface Mesh.
Figure 4-2 point cloud mesh
Figure 4-3 Surface mesh
3) by comparing the point cloud and surface deformation data automatically Mesh
Figure 4-4 Deformation of automatic data acquisition
4) Application of GSM products in order to complete rebound to amend
Figure 4-5 GSM products in order to complete the results of rebound changes
4.2 to amend the use of FEA-MESH rebound
Compensator technology and FEA will use data to improve the efficiency of die design, designers no longer need to spend a lot of time to rebuild the resilience of the surface of compensation, the process is as follows:
1) obtain the initial mesh based on FEA and springback mesh.
2), respectively, in the TD from the initial mesh and the springback mesh nodes or access information, request the number of two types of mesh nodes consistent.
3) the use of technology Compensator automatically rebound deformation data to determine the displacement of the region shown in Figure 4-6.
Figure 4-6 springback deformation automatic access to data
4) the use of GSM functions, in accordance with resilient deformation of the initiative in amending the CAD model data.
- Deformation of the reference body for the Step 3 to obtain the springback deformation of automatic data
- Can set the rebound rate of 0-1 (of course, you can set the ratio> 1).
Figure 4-7 springback deformation data in accordance with the initiative in amending the CAD model
Due to space limitations, only the top die in the automotive business ThinkDesign part of the application to do a simple introduction to the design of the mold through the application of ThinkDesign software, you can speed up the capacity of freedom to change, modify save time and reduce costs.
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