Finite Element Analysis Of Particleboard Hot-pressing Machine Beam

In this paper, Shenyang Heavy Machinery liability company RCB14004 particleboard hot-pressing machine research and development, on the particleboard hot-pressing machine finite element analysis of beam intensity. This study content is divided into the following areas:1.Particleboard hot-pressing machine understanding of the working processParticleboard hot-pressing machine to suppress the process as follows: When the slab input to press the designated location, press the feed chain, the corresponding limit switch gives the signal, activities under the beams began to pressure. When the pressure to meet the design pressure and began packing.When you reach the holding pressure time, began to slow decompression exhaust, and then continue holding pressure. After repeated decompression exhaust after (frequency and duration of holding pressure measurements may be based on the product), suppress the process is complete, activity beams slowly rise. The upper and lower beams is the key to the work of particleboard hot-pressing machine components, particle board in its hot-plate formed between the repression.Particleboard slab surface shape directly affected by the quality of particleboard hot-plate and between the contact surfaces in the Z direction of deformation. If the hot-plate and particleboard in the Z direction of the contact surface, which is on the beam deflection direction of the activities of large, then the suppression of out of particleboard slab surface uneven, resulting in excessive sanding, it will result in material waste, affecting the production of particleboard economic. Therefore, it is necessary in the design process of work carried out under the conditions of particleboard strength of finite element analysis of beams.2. Particleboard hot-pressing machine beam finite element analysis of the characteristics and stepsUp and down the beam structure of particleboard hot-pressing machine has the following characteristics: the upper and lower beams are generally made of thick steel plate welded frame structure, the structure of beams and lower beams are different only in thickness. The upper and lower beam length 17.21 meters, 2.22 meters wide, 60 mm thick steel plate. Beam structure is neat, simple, and is symmetrical, but a great size. Constraints and loading are symmetrical. There are many beam welding process considerations based on the small side of a small angle. Finite element analysis of the characteristics and structural characteristics of the upper and lower beams of the upper and lower beams necessary simplification, establishment of a suitable finite element analysis of the finite element model.Simplification of the following aspects: First, because of the structure, constraints, and load are completely symmetrical, you can take one quarter model modeling and analysis, symmetry constraints imposed by the symmetry plane, thus reducing the workload, saving the computer resources. Second, the screw holes, hot hole, and fillet, which do not affect the calculation of the elements of interest to get rid of the actual model, where all welds in accordance with succession. 3, such as between the upper and lower beam has a hot plate, hot plate between the particleboard blanks, beams and hot-plate under a continuous processing, hot plate, and particleboard blanks are completely non-interference in part of the analysis of the time with contact.Particleboard hot-press hot plate and the anti-hot-plate pass before work on the hot oil, in a heated state. The upper and lower beams will have a temperature change caused by the displacement and thermal stress. When the particle board to suppress the process, the upper and lower beams the same time be imposed by the temperature and the hydraulic cylinder mechanical pressure.After extensive literature review found that Chinese scholars are mostly in the hot-press design, mechanics of materials using only the knowledge strength checking them, even if the use of finite element software is without considering the temperature conditions, in the structure of its Field Strength calibration. By analyzing the process of hot pressing, for so long, 17.26 meters, 2.22 meters wide and a large frame structure, the temperature has a critical influence on their deformation is absolutely not ignore factors. Therefore, the upper and lower beams to obtain a realistic stress and deformation, there is a need for thermal field and structure of the field coupled analysis.Coupled thermal field and structure of the general solution steps:By the heat conduction equation and boundary conditions derived temperature distribution; By the thermal elastic equation, displacement and stress.3. Finite element analysis of particleboard hot-press machine beam strengthThe use of ANSYS software particleboard hot-pressing machine beam finite element analysis, based on results of the analysis of the hot press to make recommendations for improvement.4. Suggest improvement programCalculated by changing the thickness of the upper and lower beams in hot-press ,not only well positioned to meet the surface requirements particleboard, particleboard hot-pressing machine can also research and development has a certain significance.5. ConclusionThis thesis is a brief overview of the work of summing up.