Electrical discharge machining (EDM) shaping method for external spiral structure

A forming processing and external spiral technology, which is applied in the field of mechanical processing, can solve the problems of high manufacturing cost, difficulty in purchasing spiral broaches, inability to process high-hardness materials with high-precision dimensions, etc., and achieve low processing cost, high processing efficiency, and improved The effect of processing efficiency

Active Publication Date: 2013-09-18
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Application Information

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Problems solved by technology

The external helical structure can be processed by using a special spiral broaching machine, but it cannot be used for high-precision size spiral processing for high-hardness materials, and it is difficult to purchase a spiral broach, and the manufacturing cost of a single piece is very high

Method used

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  • Electrical discharge machining (EDM) shaping method for external spiral structure
  • Electrical discharge machining (EDM) shaping method for external spiral structure
  • Electrical discharge machining (EDM) shaping method for external spiral structure

Examples

Experimental program
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Effect test

Embodiment

[0042] The EDM machine used in the test is the HYPERSPARK2HS model produced by AgieCharmilles, Switzerland.

[0043] In this embodiment, the outer helical structure to be prepared is an example of high-strength elastic steel material, φ10±0.03 small diameter, φ12±0.03 middle diameter, φ15±0.03 major diameter, 87° thread lead angle, and nine-wire outer helical structure. The structural feature of the product is that there are nine rectangular outer spirals on the outer cylindrical surface, the spirals are evenly distributed along the circumference, and the shape is similar to nine-head threads. See figure 1 .

[0044] Such as Figure 4 Shown, the processing method of this external spiral structure, comprises the following steps:

[0045] Step 1: According to the outer contour parameters of the above-mentioned nine-wire outer spiral, use pure copper material to process the tool electrode. The processing material of the tool electrode can be conventional easy-to-process electr...

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Abstract

The invention discloses an electrical discharge machining (EDM) shaping method for an external spiral structure. The EDM shaping method for the external spiral structure is charaterized by comprising the following steps: I, machining a tool electrode according to outer contour parameters of the external spiral structure by adopting a tractable electrode material; II, machining out a plate-shaped material spiral hole electrode on a plate-shaped material by using the tool electrode; III, machining out the external spiral structure by adopting an EDM shaping mode according to the plate-shaped material spiral hole electrode. According to the EDM shaping method for the external spiral structure disclosed by the invention, firstly, the tool electrode is machined out by adopting the conventional tractable electrode material, then, a spiral hole is machined out according to the tool electrode, and finally, the external spiral structure made of the high-hardness material is machined out by adopting the EDM shaping technology according to the spiral hole. The external spiral structure processed by the EDM shaping method disclosed by the invention has the advantages that the precision is high, the requirement on tools is not high, and the processing cost is lower.

Description

technical field [0001] The invention belongs to a mechanical processing method, and in particular relates to an electric discharge forming processing method of an outer helical structure, which can be used for an outer helical structure with a small size, a large lift angle, multiple lines, high precision and high hardness. Background technique [0002] At present, there are the following types of processing methods for conventional processing of multi-thread spiral structures: turning, milling, and broaching. For the outer spiral structure with small size and large rise angle, the turning method is adopted, and the rigidity of the forming turning tool is weak. With the milling method, the tool radius is smaller, and the high-hardness materials are more worn. The external helical structure can be processed by using a special helical broaching machine, but it cannot be used for high-precision dimensional helical processing for high-hardness materials, and it is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00B23H1/04
Inventor 李丹靳世海闫寒游东洋肖娜杨峰
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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