New Equipment Introduction - Single Column CNC Vertical Lathe
I. Description of the Machine Tool Main Unit
The CK5116G-2 CNC Vertical Lathe is a new type of CNC machine tool. It can perform rough and finish machining of internal and external cylindrical surfaces, internal and external conical surfaces, end faces, arc surfaces, threads, and grooves, making it the preferred equipment for processing various motor housings. The CNC control system adopts the FANUC oi TF, which controls the X and Z axes feed movements of the tool post, enabling two-axis linkage. Notably, it features automatic hydraulic pull-cutting and manual tool-changing functions, significantly reducing the time required for secondary tool-changing and positioning. The tool holder method ensures high positioning accuracy and substantial clamping force.
II. Structural Characteristics of Machine Tools
This machine tool consists of a base, column, beam, worktable drive, octagonal slide, hydraulic system, cooling device, and electrical system.
The base is made of HT300 cast iron. Designed with an arc-symmetric structure, it combines annular reinforcing ribs and equally spaced radial reinforcing ribs, while strategically arranging triangular reinforcing ribs to form a robust integral base. This design prevents buckling and vibration, enhancing both static and dynamic rigidity.
The column is made of HT300 cast iron. For the base, the center is symmetrically arranged and securely fastened to the base with bolts and positioning pins.
The beam can be moved along the column according to the height of the workpiece, with a moving interval of 1050mm. The vertical adjustment of the beam allows machining in the state of minimal overhang distance of the sliding saddle, enhancing machining rigidity. The beam is made of HT300 cast iron. To prevent bending caused by sliding saddle movement and cutting forces, the design incorporates sufficient height and thickness along with a rational layout to improve the beam's rigidity.
The worktable consists of the worktable, worktable base, spindle components, and transmission mechanism. Both the worktable and worktable base are integrally cast and machined. The worktable adopts a fixed-spindle-type short spindle structure, equipped with a high-precision double-row short cylindrical roller bearing on the spindle. By adjusting the radial clearance, it ensures high-precision rotation of the worktable and extends its service life. Additionally, a high-precision thrust ball bearing is used as the rolling guide to maintain the end-face runout accuracy of the worktable. The bearings are preloaded to enhance the rotational precision and load-bearing capacity of the worktable. The main transmission mechanism and spindle bearings are provided with a comprehensive pressure lubrication system. The main transmission speed-changing mechanism is driven by a horizontal 30KW servo spindle motor. The main motor is connected to the main transmission box via a narrow V-belt drive, which transmits power through a single-stage horizontal six-axis speed-changing mechanism, achieving the required speed range for turning operations: 3-200r/min. The worktable supports constant linear speed machining.
The vertical tool holder consists of components such as the beam slide, rotary slide, and cross slide. The vertical tool holder can move horizontally on the beam, while the cross slide moves vertically. The horizontal movement of the vertical tool holder is the X-axis, and the vertical movement of the cross slide is the Z-axis. Both the X-axis and Z-axis are driven by FANUC AC servo motors. The vertical feed motor (Z-axis) of the tool holder is equipped with a hydraulic balance device brake to prevent tool drop in case of power failure. The vertical feed mechanism of the vertical tool holder is arranged on the left side of the cross slide and the upper surface of the rotary slide. It is driven by an AC servo motor, which is connected to the ball screw via a reducer, driving the ball screw rotation to achieve vertical feed and rapid movement of the vertical tool holder. The cross slide is an octagonal steel cross slide, with the body made of forgings and treated with quenching. The cross slide is embedded with a Capto8 turning and broaching mechanism, and the output interface specifications are Capto8-type strong broaching structure, enabling automatic broaching and tool release. The lower part of the cross slide adopts the widely popular Capto-C8 interface method, featuring automatic hydraulic tightening and manual tool change. The vertical direct tool mounting interface allows for internal and external arc turning through a Capto adapter. This design replaces traditional tool clamping methods, achieving standardized tool usage and connection. The connection structure is a high-precision polyhedron, utilizing a 1/20 taper dual-sided positioning and clamping connection. In nearly all connection structures, cutting torque is typically transmitted via drive keys, leading to stress concentration on the drive keys, which significantly impacts clamping rigidity and service life. Additionally, phase errors caused by drive keys (especially in the center height of turning operations) can reduce precision. The Capto tool system, designed in a polyhedral shape without drive keys, ensures uniform distribution of cutting torque, enhancing torsional rigidity and eliminating phase errors. Consequently, this connection structure exhibits significantly greater self-locking force and higher reliability compared to other designs.
III. Machine tool working accuracy
X-axis repeat positioning accuracy: 0.01mm (measuring length ≤1000mm)
Positioning accuracy: 0.02mm (measuring length ≤1000mm)
Z-axis repeat positioning accuracy: 0.01mm (measuring length ≤1000mm)
Positioning accuracy: 0.02mm (measuring length ≤1000mm)