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The difference between inclined bed CNC lathe and flat bed CNC lathe

Compare machine layouts
The two guide rails of the flatbed CNC lathe are parallel to the ground plane. The planes of the two guide rails intersect with the plane of the ground to form an inclined plane with angles of 30°, 45°, 60° and 75°. From the side of the machine tool, the flat bed CNC lathe bed is square, and the inclined bed CNC lathe bed is a right triangle. Obviously, under 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 applying it to a lathe is that more tool positions can be arranged.

Rigid Cut Contrast
The cross-sectional area of ​​the inclined bed CNC lathe company’s inclined CNC lathe is larger than that of the flat bed of the same specification, that is, the bending resistance and torsion resistance are stronger. In the direction of the workpiece bevelling, the cutting force of the CNC lathe with inclined bed is basically the same as the direction of the workpiece gravity, the spindle runs relatively smoothly, and it is not easy to cause cutting vibration. When the flat bed CNC lathe is cutting, the cutting force generated by the tool and the workpiece is 90° with the gravity of the workpiece, which is easy to cause vibration.

Comparing machining accuracy
The drive screw of the CNC lathe is a ball screw. The transmission clearance between the lead screw and the nut is small, but it does not mean that there is no clearance. As long as there is a gap, when the lead screw moves in one direction after reverse transmission, the repeated positioning accuracy of the CNC lathe with reverse gap will inevitably occur, thereby affecting the machining accuracy. The layout of the inclined CNC lathe can directly affect the clearance of the X ball screw, and the gravity directly acts on the axial direction of the screw, so that the reverse clearance of the transmission is almost zero. The x-direction lead screw of the flat CNC lathe is not affected by the axial gravity and cannot directly eliminate the clearance. This is the inherent precision advantage brought by the design of the inclined bed CNC lathe.

Compare chip evacuation capabilities
The inclined bed CNC lathe is affected by gravity, so it is not easy to produce winding tools, which is conducive to chip removal; at the same time, it has an intermediate screw and guide rail protection sheet, which can avoid the accumulation of chips on the screw and guide rail. Inclined CNC lathes are generally equipped with automatic chip removal machines, which can automatically remove chips and increase the effective working time of workers. It is difficult to increase the automatic chip conveyor with the flat bed structure.

Automated production comparison
With the increase in the number of machine tools and the configuration of automatic chip conveyors, it is actually laying the foundation for automated production. One person on duty for multiple machine tools has always been the development direction of machine tools. The inclined CNC lathe increases the milling power head, automatically feeds the machine tool or manipulator, automatically feeds, completes all chip processes in one clamping, automatically feeds, and automatically removes chips, making it an efficient fully automatic CNC lathe. The structure of the flat bed CNC lathe is at a disadvantage in automated production. Although the inclined bed CNC lathe is completely better than the flat bed CNC lathe, its market share is far behind. Flat bed CNC lathes are easy to produce and account for more than 90% of the CNC lathe market share.Relatively speaking, the disadvantages of inclined bed CNC lathes are the high manufacturing difficulty, the heavy bed, the need for servo motors with braking function in the X direction, and the most important thing is the high cost.

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