Design And Simulation For Laser Cutting Equipment Of Fracture Splitting Groove Of Engine Crackcase Bearing

Engine Crankcase Bearing Block is the key part of auto engine，which has strictrequirements to strength and manufacturing process. As a kind of very innovative processingtechnology, cracked technology developed from90years of the20th century，and it wasapplied to the engine crankcase bearing block. Cracking processing technology can reduce theprocessing operations, effectively save the processing equipment, improve product quality,reduce the production cost.The first process of the cracking processing is processing the initialfracture splitting groove. Laser processing has advantage of good cutting quality, no tool wear,Fast processing speed, easy to cracking. Therefore it became the main means to processingfracture splitting groove.Laser cutting equipment of fracture splitting groove of engine crackcase bearing is aspecial equipment which is designed for engine crackcase bearing. This equipment iscomposed by main frame，CNCsystem，laser system and other system，it combines light，machine and electricity. This is a universal design, it can processing different types of engine.Through to analysis the laser machining process， establish the overall design of theequipment，use the virtual prototype technology to give the result of dynamics analysis.1. Give the General structure design to laser cutting equipment of fracture splittinggroove of engine crackcase bearing. According to the transmission device requirements ofsmooth, high efficiency and precision，select the ball screw vice as table transmission devicethrough calculation. The ball screw vice model is FFB2005-2. Choose the correspondingservo motor.2. In this design，after processing one side，the laser head needs rotation180degree tocutting the other side. Choose the blade swing cylinder as rotary device of the laser head. Theblade swing cylinder’s model is FFB2005-2which produced by FESTO. As the core part ofthe laser cutting equipment，we choose the YAG solid laser cutting system produced byTRUMPF as the cutting system. And choose the SIMENS802D as the CNC system of thisequipment. 3. This paper establish parts model and whole assembly by UG software. Design themotion parameters of the laser head，cutting speed is15mm/s, the biggest movement speed is50mm/s.There have been designed two kinds of movement，uniform motion and variablespeed movement in the engine crankcase. Definite STEP function for the two kinds ofmovement. The results show that the second schemes can save time22.16seconds4. Use the ADAMS solver in UG, through setting the parameters, the two kinds of UGmovement model which were set up in UG will be imported into ADAMS in turn, then givethe kinematics simulation analysis. Output the speed, acceleration and displacement curve ofthe whole process on the corresponding direction of movement, analyze the two kinds ofsimulation results.5. According to speed change in the laser cutting process, puts forward the theory ofacceleration and deceleration control. According to characteristics of the equipment, made anew kind of acceleration and deceleration control method, in order to avoid the strong impactcaused by high speed, Improve the stability of the equipment. Prevent some problems in lasercutting，such as cutting incomplete.Using the new method to the connecting rod laser cuttingequipment, the results showed that the new method can achieve processing requirements.The laser cutting technology for engine crackcase bearing can improve crackingprocessing quality well，improve engine performance, it will have wide application prospectsin our country.At the same time, it has a positive role in promoting engine manufacturingtechnology development and improving the whole level of car manufacturing.