Analysis of Design and Manufacture Technology of Concrete Pump Car Chassis
The connecting area between the pivot base and the leg hinge is the most dangerous area of ​​the chassis structure. Therefore, the structural design of the pivot joint between the pivot base and the leg is another focus of the chassis structure design. Due to the calculation method, experience and experimental methods. In the chassis structure hinge point design presents a diversified and personalized trend: Italy ANTONELLI companies in the hinge point of the design tend to box-shaped structure, this design idea and manufacturing more in line with the domestic manufacturers of ideas, as Many manufacturers imitate the basket. Italy CIFA companies are using thick plate docking connection structure, because of this structure has its advantages of small folding space, there are still many manufacturers. This form of construction requires a good deal of welding in the plate and thin plate docking, pre-heat plate welding problems. Germany PM company in the handling of the hinge point of the most distinctive characteristics of a Bocaizhongzhu, diversification, the following series of 42 meters using thick-thin plate butt connection, 42 meters above the level series uses a box-shaped connection structure, showing its Design and manufacturing technology research specific, in-depth. Third, the design optimization theory and calculation methods in the design and manufacture of applications. The calculation theory and calculation method used in the concrete pump truck design also have a great influence on the structure design of the legs and the rotating base in the chassis. Well-known enterprises have their own research institutions, the calculation of the concrete pump truck chassis theory, manufacturing processes have in-depth study, the FEM has been widely used (finite element method) and other new methods of calculation, greatly reducing the machine's weight. Many Chinese enterprises also use FEM calculation methods, but generally only check. The calculation theory used is basically based on the calculation of the crane frame in the seventies and eighties. Many local structures are designed empirically or simply. In addition, we study welding, bending and other internal stress generated by the process, the deformation is also very small, many studies just stay in theory, rarely used in product design, resulting in many of our products at the technical level, in-kind There are big differences in quality. As the chassis structure to withstand the overturning of the vehicle and pump pumping system vibration, the local damage is mostly based on the fatigue of the local structure of the main failure. Due to the poor working conditions of the concrete pump truck, the fatigue characteristics of the under-frame structure, especially in the high-stress areas such as the hinge point, are studied deeply and the optimization research of the underframe structure will be the most important part of the design work ; To effectively reduce the welding stress, how to avoid the occurrence of delayed cracks in the welding area such as fuel tanks and water tanks will be an important issue in the manufacturing work. Chassis structure is an important part of concrete pump truck, its appearance, weight, a direct impact on the shape and performance of the machine. The emergence of new materials, the rapid development of liquid and electricity technologies and manufacturing processes have provided huge catalysts for the development of concrete pump trucks. The unified design style of the series of concrete pump truck legs provides the possibility of parametric design. In order to reduce the gap between Chinese products and advanced foreign countries, firstly, we should strengthen the optimization research on the influence of calculation theory, manufacturing process and outrigger structure on the stability of the vehicle, and the problems that arise during the use of the product Summarize, and rise to the theoretical height; Second, continue to improve the tooling, technology, improve the technical level of staff, rough production for refined production, improve the physical quality of products; Finally, emphasis on practicality in the design of new products and Economic and creative and new ideas, when the product development to a certain extent, creativity and new ideas to better enhance the customer's desire to buy, better reflect their own product differentiation and core competitiveness. Fourth, the development trend of concrete pump chassis structure. From the BAUMACHINA2004 International Fair and various large-scale exhibitions can also draw: The manufacturers in order to show their own technical strength, have introduced a longer cloth boom truck, 42 ​​meters above the level of series due to structural dimensions, vehicle height, Stability and other aspects of the impact of the manufacturers and trends are consistent, basically have adopted the structure of the front and rear swing legs connected. Due to the application of new materials, calculation methods and experimental means more perfect, the design of the chassis structure is more dexterous, artistic, easier to manufacture. Germany's Waitzinger company launched the perfect shape and art style "dragon" leg structure of the 36-meter truck, reflecting the perfect unity of design and art. Schweitzer launched a super-X arc support system, the integrated stabilization device to avoid the phenomenon of rebound, and saving pump construction space and weight loss both have a greater breakthrough, so that the use of functional design and made a huge leap. The application of proprietary technologies, such as unilateral support systems, made construction on a narrow street or restricted site a reality. Such as the German SCHWING company's EASY system and Germany's PM company's OSS system, are used to control the locking device to control the swing range of the cloth rod, the view of the unilateral leg support. With the development of electro-hydraulic technology, the flexible design of the chassis structure makes it possible to adapt the pump truck to various construction sites. In order to achieve product differentiation and strive for a greater selling point, the structural design of the chassis manufacturers have introduced their own characteristics, to diversify, personalized, proprietary development.
Main USES this series of machine tools is mainly used for groove
grinding of Self-aligning roller bearing.1, CNC ac servo control system (PLC or
CNC system), color screen display, "man-machine dialogue" and with
fault self-diagnosis function.Equipped with electronic pulse handwheel.2. Adopt
cross guide rail.3. The work-piece feed pallet and grinding wheel running
pallet are driven by servo motor.4. External cylindrical cutting grinding of
grinding wheel.5, electromagnetic centerless fixture, remote control control
demagnetization controller, in the operation panel to adjust the size of the
magnetic force.6. The workpiece shaft adopts sleeve workpiece extraction.Frequency
control of motor spee.
Self-Aligning Roller Bearing Ring Grinder Self Aligning Bearing,Self-Aligning Roller Bearing Ring Grinder,Rings Grinding,Aligning Bearing Grinder Xinxiang Sunrise CNC Bearing Equipment Co., Ltd. , https://www.cncsunrise.com
In order to make the anti-fatigue performance of the leg structure in the underframe stronger, new materials such as WELDOX700 and WELDOX960 are widely used in the design of the leg structure, while the main force-bearing welds are mostly processed into bevel Projection welding, enhanced weld fatigue caused by vibration characteristics, so that the degree of stress concentration to a minimum. Therefore, the main structure of the leg support force how to deal with should be taken as a key point to grasp.