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EDM examples and analysis of failure
Author:  Date:2011-12-13  Clicks:4233  

(1) device is a wire EDM operation the most frequent failure of the subsystem, its failure rate is much higher than other parts. Transported into the electric wire device includes a block, timing belt, screw and nut, coupling, motor and other transport silk and silk-related part of the transport, transport for the larger wire device improvements required to improve machine reliability level . Wire EDM operation affect the reliability of the device is the most important factors to improve the reliability level is a priority.

(2) cutting machine failure pattern is more frequently damaged components, processing efficiency is low and damage to other components, and the most due to failure of component damage, wear and damage to other components. Damaged parts and components damaged mainly refers to the timing belt and electrical and electronic components of the damage, and these components are mainly obtained by the outsourcing, outsourcing, and instructions and spare parts and poor quality, measures should be taken be improved.

Database based on the reliability of wire cutting, respectively, the fault location (subsystem), failure mode and failure cause analysis. EDM subsystem failure occurs mainly transported more wire device (5 9.3 2 2%), electrical systems (28.814%) and so on. These two sub-machine failures of the total failure of 88.136%, which shipped the most frequent wire device failure, the failure rate is much higher than its other parts. Transportation equipment, including transport wire electrical wire, screw and nut, timing belt, coupling, and transported into the electric wire with the other block part. Wire EDM operation affect the reliability of the device is the most important factors to improve the reliability level is a priority. High-speed Wire-cutting machine failure mode is more frequently damaged components (25.424%), processing efficiency is low (20.339%) and damaged parts (15.254%), etc., cutting machine failure caused by The reason is that most components damaged (28.814%), wear (22.034%) and damaged parts (18.644%) and so on. Parts damage and dollars, mainly refers to damage to the device timing belt and electrical and electronic devices to impairment, and these components are mainly obtained by the outsourcing, outsourcing and external cooperation shows poor quality, measures should be taken be improved. In addition, EDM wire device operation frequency significantly more than other parts of the fault, indicating the need for greater operational wire device improvements to improve machine reliability level.

Win wire device is the most frequent site of failure is the most important factor affecting the reliability of wire cutting. Win wire processing device failure model is inefficient and damaged parts, accounting for 57.143 percent. Win wire device failure is mainly due to wear, damage and broken parts, accounting for about 80%. Because the structure of a single power block into the form of two-way operation wire into the power caused by a single block and the contact between the electrode wire good times and bad, tend to produce series resistance phenomenon, so that lower life into the power block. It also reduces the processing efficiency. Parts and components damaged mainly timing belt failure. Electrical system is a more frequent site of failure is the main factor affecting the reliability of wire cutting. Electrical system failure mode is mainly component damage, up to 82.353%. Electrical system failure is mainly due to damaged components, accounting for 76.471 percent. Electrical and electronic devices are obtained by outsourcing, outsourcing, and instructions and spare parts of poor quality.


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