Positioned water spray device of reciprocating wire cut electrical discharge machining

Abstract

The invention discloses a positioned water spray device of a reciprocating wire cut electrical discharge machining. The device comprises a water spray plate and a spray nozzle mounted in the water spray plate, wherein connected wire grooves are formed in one side of each of the water spray plate and the spray nozzle; a liquid inlet channel is arranged in the water spray plate; and the spray nozzle is provided with a liquid guide groove connected with the liquid inlet channel as well as a plurality of spray holes connected with the liquid guide groove. The device is characterized in that the water spray end of the spray nozzle is located outside an end surface of the water spray plate, and a chamfer is arranged on the spray nozzle end surface outside all the spray holes. The positioned water spray device has the advantages of absence of chip accumulation in the spray nozzle, stable processing and small wire electrode buffeting range, and improves the surface accuracy of workpieces and product quality effectively.

Description

technical field [0001] The invention relates to a water spray device for a reciprocating wire electric discharge wire cutting machine tool. Background technique [0002] The mechanism of WEDM is to use the principle of "discharge machining" to perform electric erosion (spark discharge) on conductive materials to achieve the purpose of processing. Wire EDM does not need to make forming electrodes. During processing, a metal wire (usually molybdenum wire) is used as a tool electrode to discharge sparks on the workpiece. The positive electrode of the pulse power supply is connected to the workpiece, and the negative electrode is connected to the electrode wire. It reciprocates at a certain speed, it continuously enters and leaves the discharge area, and at the same time sprays liquid medium between the electrode wire and the workpiece, the workpiece moves according to the trajectory determined by the program under the control of the computer, and finally obtains the desired ...

AI Technical Summary

Problems solved by technology

Therefore, all reciprocating wire EDM machine tools are equipped with water spray devices. With the development of "medium wire cutting" technology, the traditional water spray devices that can only meet the cooling effect of water spray can no longer fully meet the requirements of "multiple cutting". The requirements of the process, the disadvantages are: 1. There are many debris, which are easy to accumulate and block the water spray hole; the inner surface of the nozzle of the traditional water spray plate is a concave spherical surface, and the water spray hole is on the concave spherical surface. There is a lot of debris, if the cleaning is not enough, it will easily accumulate and block the water spray hole, resulting in poor water spray, unstable processing, and even broken wires; 2. The traditional water spray device has no electrode wire positioning function, because the electrode wire runs faster , there must be jitter, resulting in poor machining surface accuracy and affected product quality

Images