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The wire-cutting machine is an electric machining machine that cuts metal by electrocorrosion with molybdenum wire (especially hard materials, complex parts of the line, and at the same time, it is processed by the principle of high-energy-density spark discharge ablation. Then, the wire cutting machine Do you know what works and classifications?

First, the working principle of wire cutting machine

(1) When the CNC wire-cutting machine is machining, a DC pulse voltage of 20KHz and 150v is applied between the cutting tool (copper wire or molybdenum wire) and the workpiece. Pulse discharge between the wire and the workpiece. When the distance between the tool and the workpiece is close enough (about 0.01mm), the voltage breaks down to cool the cutting fluid medium, and the cutting tool of the online cutting machine and the workpiece are uniformly discharged over the entire length, and the high-energy density electric spark discharge instantaneous temperature can be When it reaches 7000 ° C or higher, the high temperature causes the metal to be cut to vaporize instantaneously to form a metal oxide, which is melted in the cutting fluid and carried out by the moving wire cutter tool.

(2) The wire moves in the axial direction (vertical or Z direction).

(3) The workpiece is numerically controlled in the X and Y planes with respect to the electrode wire

Second, wire cutting machine classification

(1) High-speed wire EDM machine tool (WEDM-HS), the electrode wire is used for high-speed reciprocating motion. The wire speed is generally 8~10m/s. The wire can be reused and the processing speed is high, but it is fast. Silk is easy to cause the wire to shake and stop when it is reversed, which makes the processing quality drop. It is the main machine produced and used in China.

(2) Low-speed wire-cut EDM machine tool (WEDM-LS), the electrode wire is used for low-speed one-way movement, the general wire speed is less than 0.2m/s, the wire is no longer used after discharge, and the work is stable and uniform. Small jitter, good processing quality, but low processing speed, is the main machine for foreign production and use.

(3) Medium-speed wire-cut EDM wire cutting machine, also known as “medium wire cutting”. It is unique in China. Its principle is to make repeated cuts on the workpiece. At the beginning, it uses a faster wire barrel speed and a stronger high frequency to cut. * One knife uses a slower drum speed and a weaker high frequency current to light the light. , thereby improving the processing finish.

(4) Spindle reel - general use of resin material, its wear resistance, heat dissipation is poor, the merchant gives the longest life of a single piece 800h wire groove wear depth of more than 1 mm, must be sent to professional manufacturers to re-slot The process is complicated and expensive. Recently, the reel made of ceramic material exhibits high heat dissipation and anti-wear characteristics, and is expected to eventually replace the resin reel.

(5) The use of gold-plated cutting line can be cooled by water, which reduces the huge heat exchange system and reduces the use of abrasives.

(6) Cutting fluid is a very important part of the multi-wire cutting machine, especially for cutting large diameter and ultra-thin sheets. First of all, the cutting fluid itself has no pollution to the environment and the material to be processed, and does not affect the subsequent process, low viscosity, high sand content, low impurity content, and easy cleaning. The cutting fluid has a tendency to specialize.

(7) The application of the mortar recovery device system can make full use of expensive diamond powder, silicon carbide powder and boron carbide powder, thereby reducing production costs and reducing waste protection environment.

(8) People are directly testing other hard and brittle materials for more efficient, simpler and more precise cutting methods such as high pressure water jets and laser water jets. The successful application of the laser waterjet dicing machine seems to have opened up a new way for laser waterjet cutting machines.