Application of HNC-818B/T CNC System in the Upgrade for U.S.A Hardinge COBRA42 CNC Lathe

time 2022.04.21
address China

I. Customer Site Introduction

The COBRA42 full-function CNC lathe to be transformed was introduced from Hardinge, USA in 2002. The original CNC system adopts the FANUC system. The machine tool has three servo axes: X/Z/turret rotary axis, semi-closed loop control, and the spindle is a servo spindle. The machine tool was in a shutdown state before the transformation, the components in the numerical control system and the electrical system were aging, and the geometric accuracy had been partially lost.

cobra-42-full-function-cnc-lathe-before-retrofitting
COBRA42 full-function CNC lathe (before transformation)

II. Retrofit Solution

1. The configuration of CNC system devices, servo drives and motors are as follows:

2. Main functions of CNC system for machine tool applications:

The transformation of COBRA42 full-function CNC lathe mainly applies two-axis linkage function, coordinate system setting function, linear interpolation function, circular interpolation function, thread processing function, MDI and M, S, T functions, processing graphics simulation function, canned cycle features of HNC-818B/T CNC lathe controller system.

hnc-818b-tu-cnc-system
HuazhongCNC HNC-818BT system

3. The main contents of the upgrade are as follows:

-Use HuazhongCNC HNC-818B/T CNC system, supporting servo motor and servo drive for transformation;
-Overhaul the feed shaft ball screw and replace the screw bearing;
-Check and repair the main shaft and replace the main shaft bearing to ensure the accuracy and speed of the main shaft;
-Overhaul the power turret and hydraulic tailstock;
-Overhaul the hydraulic, lubrication, cooling, and pneumatic systems of the machine tool and replace damaged parts;
-Redesign the electrical control schematic diagram of the machine tool, replace the electrical control and electrical components and re-wiring.
-Restore the accuracy and function of the original machine tool.

III. The Effect after the Transformation

cobra-42-turning-center-after-retrofitting
cobra-42-turning-center-after-retrofitting
COBRA42 turning center (after transformation)

After the equipment transformation is completed, the accuracy of the machine tool and all functions have been restored, and the operation is stable; it is mainly used to process the shaft pin parts, fully meeting the process requirements of the customer.