How to implement aluminum material cutting in WEDM machine?
[China Aluminum] In the middle of wire-cutting machine tools processing aluminum materials, the wear of conductive blocks is particularly serious, and deep trenches are quickly formed on the conductive blocks. Aluminum is a common metal used in production and processing, and will not be abandoned. Therefore, we must solve this important problem. Let's take a look at where it should be handled.
1. Reasonable collocation of pulse electrical parameters: In the wire cutting process, wider pulse widths tend to produce larger alumina or aluminum oxide particles on the surface. If the pulse interval is too small, larger particles will be generated. . Molybdenum wire, on the other hand, can easily adhere to these large processing particles, which has a great negative impact on processing. Increasing the no-load voltage amplitude of the pulse power supply can reduce the possibility that the machining debris will stick to the electrode wire by reducing the pulse width and processing the pulse gap.
2. Requirements for the working fluid: At present, the aqueous solution is often used as the working fluid for the wire cutting process. The conventional configuration ratio of BMW is 1:30, and when processing aluminum materials, the ratio of 3:8 should be adopted. In order to maintain the cleanliness of the working fluid, make it work normally and effectively, and prolong the working period of the working fluid, a thick sponge can be used to prevent the debris from flowing into the water tank, keeping the working fluid free and reducing the stickiness of the processing swarf on the electrode wire. Attached. Regularly clean or replace sponge pads. The amount of water sprayed up and down the working fluid should be uniform so that the erosion can be eliminated in time.
3. Operational skills: A sponge can be added to the back end groove of the upper frame. The high-speed round-trip electrode wire is rubbed by the sponge to remove a part of the adhered oxide, to reduce the wear of the oxide on the conductive block, and to reduce the electrode wire jitter. Ensure the normal use of pulse power efficiency. Also pay attention to the working position of the replacement conductive block.
The above method is not only suitable for cutting aluminum materials, but also processing of some more special materials, such as conductive ceramics, silicon nitride and boron nitride, can also be used for reference. If EDM wire cutting machine performs large-volume aluminum processing, then the processing problem will be more prominent, and the above measures cannot fundamentally solve the problem. Therefore, it is necessary to consider from the point of view of the machine transformation and no longer use the conduction. The method of block feeding, such as the use of a silk drum, can be applied to production and processing.
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