What is the disassembly electrode in the mold?

Removing the electrode is where the required electric pulse is processed in a pair of molds. Made of electrodes. Writing UG to remove electrodes here means drawing electrodes with UG software. The function is because the mold is taken to the CNC machining center. Some places may not be grinded out. So reprocessing requires electrodes. And electrode removal is also called electrical discharge machining, which is generally called copper removal in design.

Extended data:

Experience in electrode design

(1) fully understand the mold structure before designing the electrode. Distinguish the glue position, insert position, abutment position and pillow position of the die, and confirm which parts need electrical discharge machining, and whether the die core and insert need assembly electrical discharge.

(2) The electrodes shall be designed in a certain order to prevent the electrodes from being disassembled. This is very important for the electrode design of complex dies.

(3) The design of electrode should consider the manufacture of electrode. The designed electrode should be easy to manufacture, and it is best to use only one processing method. For example, it is very convenient to machine complex electrodes by numerical control milling, and it is also easy to ensure electrode accuracy.

(4) For molds with appearance and edge line requirements, the electrode can be designed to process the whole cavity at one time; Sometimes the whole electrode is difficult to process, and there are dead corners that cannot be processed, or it is difficult to process. If the required tool is too long or too small, consider adding an extra electrode, and sometimes a corner-clearing electrode is needed locally.

(5) In EDM, convex parts of electrodes, such as sharp corners and edges, wear faster than flat parts. In order to improve the accuracy of EDM, the electrode can be divided into main electrode and auxiliary electrode in design. First, the main electrode is used to process the main part of the cavity or hole, and then the auxiliary electrode is used to process the sharp corners and narrow slits.

(6) For some tiny electrodes with great height difference, if you want to learn more knowledge of NC programming, please +Q group 6 1387586 1. In NC milling and EDM, the electrode is easily deformed. When designing the electrode, the reinforced electrode structure should be adopted.

(7) The electrode must extend to the opening direction of the machining part by a certain size to ensure that there are no protruding ribs at the mouth after machining.

(8) Consideration should be given to avoiding gaps in some electrodes, so as to avoid undesirable discharge outside the machined parts during EDM.

(9) When designing electrodes, we should consider reducing the number of electrodes. It is reasonable to combine some different machining parts on the workpiece into a whole or realize machining at multiple positions by moving coordinates. As shown in the following figure, the same machined parts on the workpiece are machined by moving the electrode coordinates. Electrode with different machining parts combined together

(10) When designing electrodes, parts with different processing requirements should be designed separately to meet their respective processing requirements. For example, the surface roughness requirements and dimensional accuracy of assembled parts and molded parts in mold parts are different, so the electrodes of these parts cannot be mixed and designed together.

(1 1) Design a suitable base for the electrode. The base is the benchmark of electrode calibration and positioning in EDM, and it is also the benchmark of electrode multi-process machining. For example, in the process of removing the corner of the cutter on the electrode by wire cutting, it is necessary to use the pedestal for positioning. In addition, it is best to design a reference angle on the base to facilitate the identification of the direction when installing the electrode.

(12) When designing electrodes, EDM process should be considered. Choose Z-axis servo machining or transverse machining or multi-axis linkage machining; The electrode should be easy to clamp and locate; According to the specific situation, chip removal and exhaust holes are set.

(13) Determination of electrode number. The determination of the number of electrodes mainly depends on the machining shape and quantity of the workpiece, and then the material, machining depth and machining area of the workpiece should be considered.

(14) There are two ways to design the base of the electrode. One method is to design the base based on the maximum shape of the electrode machining part, and the result is that the coordinate values of X, Y and Z based on the base are often decimal. The second method is to determine the integers of the x, y and z coordinate values of the benchmark data. Obviously, the second method can prevent the operator from misreading the complex decimal in EDM.

(15) After the design of all electrodes of a set of dies is completed, fill in the material preparation sheet (confirm the length, width and height of the electrode blank and the number and material of the electrodes according to the electrode requirements), arrange the production of the electrodes, and design the drawings of electric spark (discharge coordinates, processing requirements and details).

References:

Baidu encyclopedia-mold disassembly electrode