Machine tool layout comparison
The plane of the two guide rails of the flat bed CNC lathe is parallel to the ground plane. The plane of the two guide rails of the inclined bed CNC lathe intersects with the ground plane to form an inclined plane, with angles of 30°, 45°, 60°, and 75°. Viewed from the side of the machine tool, the bed of a flat-bed CNC lathe is square, while the bed of an inclined-bed CNC lathe is in a right-angled triangle shape. Obviously, with the same guide rail width, the X-direction carriage of the inclined bed is longer than that of the flat bed. The practical significance of its application in lathes is that more tool positions can be arranged.
Xinfa CNC tools have the characteristics of good quality and low price. For details, please visit:
CNC Tools Manufacturers – China CNC Tools Factory & Suppliers (xinfatools.com)
Cutting rigidity comparison
The cross-sectional area of the inclined bed CNC lathe is larger than that of the flat bed of the same specification, that is, it has stronger bending and torsion resistance. The tool of a slant bed CNC lathe cuts downwards from the oblique top of the workpiece. The cutting force is basically consistent with the direction of gravity of the workpiece, so the spindle runs relatively smoothly and is less likely to cause cutting vibration. However, when a flat bed CNC lathe is cutting, the tool and the direction of gravity are basically consistent. The cutting force generated by the workpiece is at 90° to the gravity of the workpiece, which can easily cause vibration.
Processing accuracy comparison
The transmission screw of the CNC lathe is a high-precision ball screw. The transmission gap between the screw and the nut is very small, but it does not mean that there is no gap. As long as there is a gap, when the screw moves in one direction, it will then drive in the opposite direction. When working, backlash will inevitably occur, which will affect the repetitive positioning accuracy of the CNC lathe, thereby affecting the machining accuracy.
The layout of the inclined bed CNC lathe can directly affect the clearance of the ball screw in the X direction. Gravity directly acts on the axial direction of the screw, making the backlash during transmission almost zero. The X-direction lead screw of a flat-bed CNC lathe is not affected by axial gravity, and the gap cannot be eliminated directly. This is the inherent precision advantage that the design brings to the inclined bed CNC lathe.
Comparison of chip removal capabilities
Due to the gravity, the inclined bed CNC lathe is not prone to winding tools, which is conducive to chip removal; at the same time, combined with the central screw and guide rail protective sheet metal, it can prevent chips from accumulating on the screw and guide rail. Slant bed CNC lathes are generally equipped with automatic chip conveyors, which can automatically remove chips and increase the effective working time of workers. The structure of the flat bed makes it difficult to install an automatic chip conveyor.
Automatic production comparison
The increase in the number of machine tools and the configuration of automatic chip conveyors actually lay the foundation for automated production. One person taking care of multiple machine tools has always been the direction of machine tool development. The inclined bed CNC lathe is equipped with a milling power head, an automatic feeding machine or a manipulator, automatic loading, completes all chip cutting processes in one clamping, automatic unloading, and automatic chip removal, and it becomes an automatic CNC lathe with extremely high work efficiency. The structure of flat bed CNC lathes is at a disadvantage in automated production. Although inclined bed CNC lathes are more advanced than flat bed CNC lathes, their market share lags far behind. Flat-bed CNC lathes account for more than 90% of the market share of CNC lathes due to their ease of production and other advantages.
Post time: Nov-16-2023
