The overall layout of the five-axis horizontal turning-milling machining center is a gantry-type thermally symmetrical structure. It consists of left and right columns, connecting beams, and a worktable base forming a frame structure. Finite element analysis shows that the five-axis horizontal turning-milling machining center gives the machine tool's large components and the entire machine high strength, high rigidity, and high vibration absorption. The crossbeam moves on the left and right column guide rails, driven by a dual-axis AC motor, and its vertical movement is achieved through left and right crossbeam lifting boxes and lead screw drives. A CNC turning tool holder, driven by an AC servo motor , is installed on the right side of the crossbeam; a CNC milling tool holder , driven by an AC servo motor, is installed on the left side of the crossbeam.
The basic components of the five-axis horizontal turning and milling machining center (left and right columns, crossbeams, worktable and worktable base, etc.) are all integrally cast structures. The five-axis horizontal turning and milling machining center is made of high-strength, low-stress cast iron. After casting, it is hardened, rough-machined and then aged , giving the machine tool the characteristics of high strength, high rigidity, high vibration resistance and high vibration absorption.
The gantry consists of left and right columns and connecting beams. The left and right columns and the worktable base have a thermally symmetrical structure. In the stiffness matching standard, the X-axis stiffness and torsional stiffness of the gantry account for a large proportion. The new double-column vertical lathe columns are wider in the X-axis than traditional columns to enhance the stiffness in the dimensional direction of the machined parts and ensure the dimensional accuracy of the machined parts. To ensure the torsional stiffness of the gantry, diagonal ribs are arranged in the left and right columns. Through computer finite element optimization design, the gantry frame is guaranteed to have sufficient stiffness and strength. At the top of the gantry, there are left and right lifting boxes driven by dual-shaft AC motors. The crossbeam is moved up and down through gear pairs, worm gear pairs, and double lead screws.
The main drive of the five-axis horizontal milling and turning machining center is driven by a vertical DC main motor. The main motor and the main transmission box are connected by a gearbox and a vertical spindle mechanism for speed regulation, achieving the required speed range during turning. The gearbox is a two-stage vertical spindle gearbox.
The five-axis horizontal milling and turning machining center features a two-stage speed change controlled by electromagnetic spool valves and hydraulic cylinder circuits. To prevent pressure loss in the speed-changing cylinders, pressure relays, accumulators, and hydraulic lock mechanisms are installed in the control circuit to ensure reliable speed change operation. All gears in the gearbox undergo quenching and grinding processes, thereby enabling the spindle to achieve the necessary feed speed, high transmission accuracy and efficiency, and reduced transmission vibration and noise.
