Method and tooling for electric spark machining of internal thread of hard alloy product

A technology of hard alloy and processing method, which is applied in the direction of electric processing equipment, metal processing equipment, accessory devices, etc., and can solve the problems of small effective working area of ​​electrodes, affecting the quality of internal threads, and difficulty in ensuring the size and shape accuracy of internal threads, etc.
CN104668682AActive Publication Date: 2015-06-03成都科力铁硬质合金有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
成都科力铁硬质合金有限公司
Publication Date
2015-06-03

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Abstract

The invention discloses a method and a tooling for electric spark machining of an internal thread of a hard alloy product. The method comprises the following steps of S1: thread bottom hole machining; S2: tooling fabrication, including fabricating an electrode for discharging to the hard alloy product and a spiral clamping device for clamping the hard alloy product, and specifically including the following steps of S21: electrode fabrication; S22: spiral clamping device fabrication; S3: tooling installation; S4: product clamping; S5: internal thread machining, wherein the tooling includes the electrode for discharging to the hard alloy product and the spiral clamping device for clamping the hard alloy product. The method and the tooling for electric spark machining of the internal thread of the hard alloy product disclosed by the invention have the advantage that the machining of the internal thread of the hard alloy product and the machining of various internal circular large spiral grooves can be performed on an electric spark machine tool without Z-axis rotation.
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Description

technical field

[0001] The invention belongs to the technical field of hard alloy manufacturing, and in particular relates to a processing method and tooling for electric discharge machining of inner threads of hard alloy products. Background technique

[0002] The cemented carbide manufacturing process consists of three parts: mixture preparation, press forming and sintering. Although the internal thread of cemented carbide can be formed by special molding or compaction, it is difficult to guarantee the internal thread of the cemented carbide sintered product after shrinkage due to the large non-uniform shrinkage due to the sintering of the compact into the final product. Dimensional and shape accuracy, so the internal thread of cemented carbide sintered products can only be completed by subsequent processing.

[0003] The processing of internal threads can usually only be completed by turning, tapping, whirlwind milling and other processing methods. Carbide sintered produ...

Claims

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