High-precision 5-axis Linkage Vertical Processing Center

Machine specifications and key technical parameters.

Workstable size: 400 mm, maximum carrying 200 kg, spindle speed of 42 000 r/min, X/Y/Z axis travel 600 mm/400 mm/415 mm, fast moving speed 36 m/min;X/Y/Z positioning accuracy of 5 sm, repeat positioning accuracy of 3 m; A/C axis maximum speed of 50 r/min and 100 r/min, A/C positioning accuracy 7", A/C positioning accuracy 4".

High rigidity and reliability of the main structure of the machine tool.

The main body of the machine tool is a five-axis linkage mechanism, the column is fixed on the back side of the bed, the slide with the spindle box on the pillar left and right along the X axis movement, the skateboard with A, C two-axis swing on the bed body before and after the Y axis movement, the spindle box on the slide seat up and down along the Z axis movement, the knife library fixed on the side of the column. The sliding seat adopts the top-mounted structure and the casting is highly rigid and light design, which makes the motion unit flexible and adapts to the high speed requirements. The slide seat along the rail for X-way movement, travel increased, the movement of the slide seat always does not leave the rail, straightness, positioning accuracy and processing accuracy are easy to ensure. The workstable only moves in one direction and follows the principle of lightweight design of moving parts. Flat long spindle box structure, so that the spindle center of gravity as close as possible to the rail, so that the spindle suspension is small, the bending moment is small, in addition, the rail is mounted on the spindle box, sliders on the slide seat, greatly enhance Z-direction rigidity, improve processing accuracy and motion stability, positioning accuracy is high.

High-speed spindle unit.

Optional German high-speed direct-drive electric spindle, equipped with oil and gas lubrication system, the motor directly drives the spindle to achieve a non-stage variable speed, up to 42,000 r/min, maximum output power of 30 kW, torque 19.1 N.m, axial and radial run-out less than 1 m, high-speed high-precision processing.

High-precision swing unit.

AC swing turntable is driven directly by Siemens torque motor, equipped with high-precision angle encoder, compared to the worm-driven CNC turntable with higher speed, fast bidirectional reaction capability, zero back gap, high dynamic feedback and higher precision advantages; The use of constant temperature water forced cooling, to ensure constant temperature during continuous processing, reduce the amount of thermal deformation, rotating unit using YRT turntable bearings, with high rigidity, strong carrying capacity and high operating accuracy characteristics, can withstand radial load, two-way axial load, tip torque and no clearance.

Mobile parts optimize the design.

The transmission system chooses the ball screw side drive mode, which has the characteristics of high transmission efficiency, low heating and long life, and realizes the technical index of high speed and high acceleration of the machine tool's incoming shaft through the mobile lightweight design, compared with the linear motor drive, the ball screw side drive has an incomparable advantage in terms of cost and heating.

Static precision matches the design.

Machine static accuracy refers to the geometry and position accuracy of the machine under the condition of empty load, including the linearity of moving parts, position accuracy, repeat position accuracy and circular beating of swing components, etc., reasonable machine tool static precision distribution should follow the principles of applicability, reliability and process, large shrink control tolerances or unprincarised expansion accuracy control items will increase unnecessary control costs. Based on the above principles, the design is forwardly fitted through reverse inference, and the design precision is broken down into basic parts, which finally meets the design requirements.

Summarize.

Five-axis linkage vertical processing center has now completed assembly and commissioning, after preliminary testing, has basically met the design indicators. The development of machine tools is of great significance to improve the overall level of independent manufacturing in China's automotive industry, break the technical blockade of foreign countries, and solve the problem of auto shaft tooth parts precision forming and processing equipment.