Abstract: Accurate 3D modeling and movement simulation of brick maker can be made by UG software. The significance of mechanism simulation was expounded, at the same time, the procedure of mechanism motion analysis scheme, which was created in UG, was pointed out, and then,according to it, the whole process of realizing motion simulation was expounded in detail, the whole process of the brick maker can reappeared. Whether the result of the movement is consistent with the design can be examined. Simulation results show that this design is reasonable, and available to avoid mistakes.
Keywords: brick maker; dynamic assembly; simulation; Unigraphics
UG is one of the most advanced and tightly integrated high-end CAD/CAD/CAE/CAM software for the manufacturing industry in the world.UG software 3D simulation design is an important component of CAID/CAD/CAE/CAM.The product design concept can be perfectly demonstrated using this technology, and timely product styling design can be carried out; By conducting assembly simulation and mechanism motion simulation for dimensional interference and motion interference inspection, errors in design can be detected in a timely manner to ensure the accuracy of product design dimensions; Improve design accuracy and ensure product design quality.The UG 3D simulation design process is shown in Figure 1.
Figure 1
We have developed a non burning brick making machine, which is a hydraulic forming machine with its main power source being hydraulic cylinders.This non burning brick making machine is a four column and four cylinder synchronous brick making machine. The upper and lower crossbeams are welded with high-quality steel plates, making it a high-quality equipment for producing large concrete products such as pavement bricks and curbs.
1. UG Modeling and Virtual Assembly of Brick Making Machine
The modeling function of UG enables rapid conceptual and detailed design, interactive establishment and editing of various complex component models.By applying this software, we can obtain a solid model that truly reflects the structure and assembly relationship of various parts of the non fired brick machine.When building a model of a unburned brick machine part, various scanning entities can be created by stretching and rotating the sketch, and various feature bodies can also be created using the features provided by the system.
Assembly is a process of organizing and positioning various components of a product, establishing constraint relationships between components through pairing conditions to determine their position in the product.UG software adopts a virtual assembly mode, where the 3D model of the component is referenced by the assembly rather than simply copied into the assembly diagram. The concept of reference sets is used to simplify the model information.At the same time, the geometric correlation of the assembly components is maintained based on the main model. If a component is modified, the assembly components referencing it will automatically update to reflect the latest changes in the components.In UG, top-down, bottom-up, or hybrid assembly methods can be used.Here, a bottom-up approach is adopted, which involves gradually assembling a three-dimensional model of a single component that has already been established, and finally forming an assembly part. The assembled non burning brick machine model is shown in Figure 2.
Figure 2
The explosion view in assembly modeling can automatically explode and separate assembly components according to pre-set directions and distances, and the explosion view can be converted to the assembly body.Explosion views can also generate corresponding 2D engineering drawings, allowing us to easily understand the internal structure and spatial projection relationship of the assembly.
The specific steps for exploding the entire mechanism are as follows:
The first step is to select the explosion diagram icon, then select the entire part to automatically explode, then select the edit explosion icon, and input the distance to explode one by one, and the explosion is successful.
The second step is to render the exploded image and output the generated exploded image as shown in Figure 3.
Figure 3
2. Motion Simulation
2.1 Steps to Create a Motion Analysis Scheme
2.1.1 Creating Connecting Rods
Analyze the assembly master model and clearly divide the parts and components of the analyzed mechanism. The synchronous motion parts and components should be integrated into a connecting rod, which will be beneficial for future analysis. If each part is divided into a separate connecting rod, it is also possible and convenient, but it will bring trouble for subsequent work.
2.1.2 Creating a motion pair
Before creating a motion pair, the connecting rods in the mechanism have no constraints and have 6 degrees of freedom. After creating a motion pair, the connecting rods can be constrained by one or several degrees of freedom, which limits the relative motion between the connecting rods and allows the mechanism to move in a predetermined manner.The UG motion analysis module provides 12 types of motion pairs, which can limit the number of degrees of freedom for different numbers and types.
2.1.3 Defining Motion Driven
3. Conclusion
This design is based on Unigraphics software for 3D modeling and simulation of the brick making machine. The results show that the assembly and principle simulation of the brick making machine can effectively avoid major errors in the system equipment during on-site assessment, thereby simplifying the design process, shortening the development cycle, reducing costs, and improving product quality and performance.
