The difference between CNC Slant bed lathe and CNC Flat bed lathe

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

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1. Planning comparison between Slant bed lathe and flat bed CNC lathe

 The plane of the two guide rails of the flat bed CNC lathe is parallel to the ground plane. The position plane of the two guide rails of the inclined bed CNC lathe intersects with the ground plane to form a slant plane, with angles of 30°, 45°, 60°, and 75°.

 Viewed from the side of the slant bed CNC lathe, the bed of the flat bed CNC lathe is square, and the bed of the inclined bed CNC lathe is a right triangle. Obviously, in the case of the same guide rail width, the X-direction carriage of the inclined bed is longer than that of the flat bed, and the practical significance of applying it to the lathe is that it can organize more tool positions.

 

2. Comparison of cutting rigidity between slant bed lathe and flat bed CNC lathe

 The cross-sectional area of the CNC lathe with inclined bed is larger than that of the standard flat bed, that is, it has stronger bending and torsion resistance. The tool of the slant  bed CNC lathe cuts downwards on the oblique top of the workpiece. The cutting force is basically the same as the gravity direction of the workpiece, so the spindle works relatively stable and does not easily cause cutting oscillation. When the flat bed CNC lathe is cutting, the tool and the The cutting force generated by the workpiece is 90° to the gravity of the workpiece, which is easy to cause oscillation.

 

3. Comparison of machining accuracy between slant bed lathe and flat bed CNC lathe

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, but only a gap. When the screw moves in one direction and then reverses During the transmission, it is inevitable that there will be a reverse gap, which will affect the repeat positioning accuracy of the CNC lathe, and then affect the machining accuracy. The design of the slant bed CNC lathe can directly affect the clearance of the ball screw in the X direction, and the gravity directly acts on the axial direction of the screw, so that the reverse clearance during transmission is almost zero. The X-direction screw of the flat-bed CNC lathe is not affected by axial gravity, and the gap cannot be eliminated directly. This is the inherent precision advantage brought by the description to the inclined bed CNC lathe.

 

4. Comparison of chip removal performance between slant bed lathe and flat bed CNC lathe

Due to the gravity, the slant bed CNC lathe is not easy to wrap around the tool, which is good for chip removal; together with the central screw and guide rail to protect the sheet metal, it can prevent chips from accumulating on the screw and guide rail.

Slant bed CNC lathes are usually equipped with an automatic chip removal machine, which can automatically remove chips and increase the effective working time of workers. The layout of the flat bed is difficult to add an active chip removal machine.

 

5. Automatic production comparison between slant bed lathe and flat bed CNC lathe

 

The increase in the number of lathe tools and the configuration of the automatic chip conveyor are actually laying the foundation for automated production. One person guarding multiple machine tools has always been the direction of machine tool development. Slant bed CNC lathes are equipped with milling power heads, automatic feeding machine tools or manipulators, automatic loading, one-time clamping to complete all chip cutting processes, automatic blanking, and automatic chip removal, and become an automatic CNC lathe with high working efficiency. The layout of the flat bed CNC lathe is at a disadvantage in automated production.

 


Post time: Dec-17-2022