Comparison between slant-bed CNC lathe and flat-bed CNC lathe


1. Comparison of the machine layout of slant-bed CNC lathe and flat-bed CNC lathe.

Flat bed CNC lathe two guide rails are located in the plane parallel to the ground plane. Inclined bed CNC lathe where the two rails are located in the plane and the ground plane intersect, into a slanting surface, the angle has 30 °, 45 °, 60 °, and 75 ° points. From the side of the machine, a flat-bed CNC lathe bed is a quadrangle, slant-bed CNC lathe bed is a right triangle. Obviously, in the case of the same width of the guideway, the X-drag plate of the slant bed is longer than that of the flatbed, and the practical significance of the application in the lathe is that it can be arranged with more number of tool positions.

2. Slant bed CNC lathe and flat bed CNC lathe machine tool chip removal ability comparison.

Due to the relationship between the gravity slant bed, the CNC lathe is not easy to produce a winding tool, conducive to chip removal. At the same time with the center of the screw and guide rail protection sheet metal, can avoid the chip in the screw and guide rail accumulation. Slant-bed CNC lathe is generally equipped with an automatic chip conveyor. Which can automatically remove chips and increase the effective working time of workers. The structure of a flat bed is difficult to add an automatic chip conveyor.

3. Comparison of automatic production of slant-bed CNC lathe and flat-bed CNC lathe.

The increase in the number of machine tool positions and the configuration of automatic chip conveyors are actually laying the foundation for automatic production. One person to guard multiple machines has always been the direction of machine tool development. Slant-bed CNC lathe and then add milling power head, automatic feeding machine tool or robot, automatic loading, a clamping to complete all the chip-cutting process, automatic discharging, and automatic chip removal, it becomes an automatic CNC lathe with working efficiency*. The structure of a flat bed CNC lathe is at a disadvantage in automated production. Although the slant-bed CNC lathe is comprehensively more advanced than the flat-bed CNC lathe, it is nevertheless far behind. The advantages of flatbed CNC lathes such as easy production occupy more than 90% of CNC lathes.

4. Slant-bed CNC lathe and flat-bed CNC lathe machine cutting rigidity comparison.

Slant-bed CNC lathe cross-section area than the same specifications as the flat bed, that is, more resistant to bending and twisting ability. Slant-body CNC lathe tool is in the workpiece diagonally above the downward cutting, the cutting force and the direction of gravity of the workpiece are basically the same, so the spindle is relatively smooth, not easy to cause cutting vibration, while the flat-bed CNC lathe in the cutting, the tool and the workpiece cutting force and the gravity of the workpiece into 90 °, easy to cause vibration.

5. Slant-bed CNC lathe and flat-bed CNC lathe machine tool machining accuracy comparison.

CNC lathe drive screw is a high-precision ball screw, the transmission gap between the screw and the nut is small, but it is not that there is no gap, and as long as there is a gap when the screw moves in one direction and then reverse transmission, it is inevitable that the reverse gap, there is a reverse gap will affect the repeatability of the positioning accuracy of the CNC lathe, thus affecting the machining accuracy. The layout of a slant-bed CNC lathe can directly affect the clearance of the X-direction ball screw, gravity acts directly on the axial direction of the screw, so that the backlash during transmission is almost zero. Flatbed CNC lathes have X-direction screws that are not affected by axial gravity, and the clearance cannot be eliminated directly. This is the innate accuracy advantage that the design brings to the slant-bed CNC lathe.