An electric discharge machine tool for inner cavity treatment of metal products

Abstract

The invention discloses an electric discharge machine tool for internal cavity treatment of metal products, which comprises a bed and a column, a workbench is arranged on the bed, a spindle head is arranged on the upright column, the spindle head and the workbench are arranged correspondingly, and a water tank is arranged on the workbench. The bottom of the tank is equipped with a fixture for clamping the workpiece. The water tank is connected to the working fluid circulation system. The electrode chuck is installed at the lower end of the spindle head. The tool electrode is installed on the electrode chuck. The cavity structure of the tool electrode matches the workpiece, and the workpiece is horizontal on the fixture. Arrangement, the electrode chuck is connected with the adjustment mechanism, and the adjustment mechanism is used to adjust the rotation of the electrode chuck around the height direction of the machine tool. The structure of the invention is stable and the layout is reasonable. Through the setting of the tool anode and the adjustment mechanism, the tool anode is electroeroded first and then slotted. The purpose of widening and forming the wall of the electro-erosion tank significantly improves the processing efficiency of the special-shaped tank, reduces power consumption, and the electro-erosion products are discharged quickly, and the processing process is stable and reliable.

Description

technical field [0001] The invention relates to the field of electric discharge machine tools, in particular to an electric discharge machine tool for inner cavity treatment of metal products. Background technique [0002] The EDM machine tool is a machine tool that uses the principle of electric spark discharge to erode metal surfaces to process metal parts. Since the principle of EDM is different from that of ordinary metal cutting, the structure of EDM machine tools is different from ordinary metal cutting machine tools. First of all, it has a high-energy pulse power supply device to provide energy for generating electric sparks. Its main function is to generate repeated high-intensity electric pulses on tool electrodes and workpiece electrodes to generate discharge electric sparks; When the tool and the workpiece are not in direct contact, there is no obvious cutting force, so the EDM machine tool is not equipped with a high-strength main drive system, but in order to e...

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Problems solved by technology

[0003] Using an EDM machine tool to process the mold cavity is one of the common methods. Since the mold is a high-hardness metal workpiece, when performing electroerosion machining on some mold workpieces with special-shaped grooves on the side walls of the cavity (such as Figure 4 As shown in the workpiece), since there are special-shaped grooves on the side wall of the workpiece cavity, the groove length direction of the special-shaped grooves is consistent with the height direction of the machine tool, and the various special-shaped grooves are distributed in a circular array around the center line of the cavity. The mouth gradually becomes larger. Because the distance between the special-shaped grooves is small, and the direction of some special-shaped grooves from the bottom of the groove to the notch is not a straight line, it is difficult to process with traditional cutting machine tools. When using EDM machining, it is generally prepared first. The anode of the tool with the same special-shaped groove structure, and then gradually descends under the drive of the spindle head for electro-erosion processing. This processing method is not only too inefficient, but also the large loss of the anode of the traditional metal tool will lead to changes in the processing size, resulting in poor processing. Qualified. In addition, due to the special shape of the groove, it is difficult to discharge the electric corrosion products, which seriously affects the processing efficiency and processing quality.

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