Numerical control transformation design of heavy horizontal lathe and roll lathe (2)

3.3 Frame type turret is equipped with high rigidity and strong knife row on the left and right sides of the turret horizontal slide and the turret body. The arbor can be used for the contraction, positioning and clamping movement along the radial direction of the workpiece to ensure the tool holder is within the processing range. The maximum overhang stiffness is sufficient to ensure cutting accuracy. At the same time, it has a fast tool change structure, which makes the knife have high-precision positioning function. When the special accessories are configured, the inner hole, the internal thread, the inner taper hole, etc. can also be turned.

3.4 The tool holder walking platform and the hanging operation button station design a tool holder running platform and a hanging operation button station which are convenient for the operator to operate and process from the perspective of humanized design. The operator stands on the tool holder and can realize centralized control of the main motion and feed motion of the machine tool parts by hanging the button station.

3.5 Fitted with the UK “Renishaw” side head for easy inspection of the workpiece.

3.6 CNC system can choose any Spanish "FAGOR" 8040 or 8055, Germany "Siemens" 802D or 840D and other CNC systems. The numerical control system can control X and Z two feed axes and spindle S, and has the functions of linear and circular interpolation, pitch error compensation, tool radius compensation, tool length compensation and tool wear compensation, and can realize graphic simulation, blueprint programming, Fault self-diagnosis, storage and recall of various parameters.

4 Comparison of main performance parameters of new CNC type and CNC modified heavy horizontal lathe (roller lathe)

    Take C 61 20 0 new CNC type and CNC transformation type as an example (see Table 2)

From the comparison in Table 2, we can see:

(1) The main parameters of the new CNC type and CNC modified heavy-duty horizontal lathe and roll lathe (the first six items in the table) are consistent;

(2) The performance parameters of the main drive are the same, but the mechanical structure inside the CNC modified bed box is more complicated than the CNC heavy truck, and the maintenance is slightly more difficult;

(3) The key technical parameters of the vertical and horizontal feed movements that determine the performance of the machine tool are the same, and the structural design is also consistent;

Table 2

(4) In the protection of the large vertical tool holder motion guide rail, the design layout of the new CNC heavy-duty truck can be used to inlay the guide rail, and the full-length protection with the protective cover is beneficial to the long-term maintenance of the motion precision; The bed is old machine tool, so the structure is limited, and the guide rail cannot be fully protected. Although it can be inlaid with steel strips, in the long-term operation, iron filings and the like will inevitably damage the guide surface of the bed, which has an impact on the accuracy.

5 Conclusion

    In summary, the functions and main performance parameters of the heavy-duty horizontal lathe and roll lathe after CNC transformation (except for bed protection) are consistent with the performance parameters of the new CNC heavy-duty horizontal lathe and roll lathe, however, the price is about It is about 1/3 of the new products of CNC heavy-duty trucks; the production cycle is shortened by 1/2 compared with the new products.

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