First, multiple cutting technology

      Multiple cutting technology is the fundamental means to improve the precision and surface quality of low-speed wire-cut EDM. It is the scientific integration of design and manufacturing technology, numerical control technology, intelligent technology, pulse power technology, precision transmission and control technology. Generally, the cutting is performed by one cutting, the secondary cutting is used to improve the precision, and the cutting is performed three times or more to improve the surface quality. Originally, in order to achieve a high-quality surface, the number of times of cutting was as high as 7 to 9 times, and now only 3 to 4 times.

Second, the corner processing technology is continuously optimized and improved

      Due to the hysteresis of the wire when cutting the corner, the corner collapses. In order to improve the accuracy of corner cutting, researchers have adopted more dynamic corner processing strategies. Such as: change the wire path; change the processing speed (thin plate); automatically adjust the water pressure; control the processing energy.

By adopting a comprehensive corner control strategy, the corner shape error during roughing is reduced by 70%, and the matching accuracy of up to 5 一次 can be cut at a time.

Third, the use of technology to improve flatness

      High-precision finishing circuits are techniques for improving flatness and are considered to be significant for thick parts processing.

Fourth, the machine tool structure is more precise

     In order to ensure high-precision machining, many technical measures have been taken to improve the accuracy of the host: 1 control temperature. The water temperature cooling device is used to make the internal temperature of the machine tool the same as the water temperature, which reduces the thermal deformation of the machine tool. 2 uses a linear motor. High responsivity, precise positioning can achieve 0.1μm equivalent control, no vibration, no noise, increase the discharge frequency, maintain stable discharge, cut Ry5 μm twice. 3 It adopts ceramic and polymer artificial granite parts, and its thermal inertia is 25 times larger than that of cast iron, which reduces the influence of temperature change on cutting precision. 4 The fixed workbench and column moving structure are adopted to increase the weight of the worktable, which is not affected by water immersion processing and workpiece weight change. 5 Immersion processing is used to reduce the thermal deformation of the workpiece. 6 motor servo, closed loop wire tension control. 7 high-precision tool setting: voltage modulation tool power supply. The accuracy of the tool setting is up to ±0.005 mm without damaging the workpiece, whether wet or dry.

Five, filament cutting

    In order to carry out micro-finishing of small rounded corners, narrow slits, narrow grooves and fine parts, various manufacturers have made great efforts to study the filament cutting technology. At present, the world's major manufacturers of electric processing machines can use 0.02 ~ 0.03 mm electrode wire for cutting.