Permanent magnet field electric spark ostiole compound processing method and device

A composite machining and EDM technology, which is applied in the field of permanent magnetic field EDM small hole composite machining and devices, can solve the problems of ensuring unfavorable guiding accuracy, reducing the rigidity of tool electrodes, reducing the shape and position accuracy of small holes, etc., and improving the processing speed , Reduced machining stability, and improved clearance chip removal conditions

Inactive Publication Date: 2011-06-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of the use of electromagnetic vibrating heads or ultrasonic vibrating heads to improve chip removal, these devices are separate from the guiding device. For limited machine space, additional devices will take up a larger space, and the more additional devices are used for tool electrodes The more factors affecting the guiding accuracy, the more unfavorable it is to guarantee the guiding accuracy
It is difficult to guarantee the guiding accuracy, which will inevitably reduce the shape and position accuracy of the small hole
Due to the disadvantages of edge-cutting, the application of tool electrodes is difficult to popularize. Therefore, there is an urgent need for a processing method and device that can improve chip removal conditions without reducing the rigidity of tool electrodes.

Method used

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  • Permanent magnet field electric spark ostiole compound processing method and device
  • Permanent magnet field electric spark ostiole compound processing method and device
  • Permanent magnet field electric spark ostiole compound processing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] I. Select the prepared magnetic guide 5

[0023] The magnetic guide 5 used in the experiment is made of N35 NdFeB permanent magnet material, which is cylindrical and processed at the center of the magnetic guide 5 with a diameter of 1.5mm± 0 +0.05 The small hole is magnetized, and the direction of the magnetic field lines of the magnetic guide 5 is parallel to its axial direction;

[0024] II, the magnetic guide 5 prepared in the step I is fixed on the magnetic guide holder 3 with set screws 4;

[0025] III, fix the workpiece 7 on the machine tool table, adjust the relative position between the magnetic guide 5 and the workpiece 7, so that the magnetic guide 5 is located directly above the workpiece 7 and the vertical distance is 5mm, and the magnetic induction intensity at the upper surface of the workpiece 7 is now 190mT, the direction of the magnetic field line of the magnetic guide 5 is parallel to the axial direction of the small hole to be processed, and after t...

Embodiment approach 2

[0028] Embodiment 2: Change the vertical distance between the magnetic guide 5 and the workpiece to be 15mm. At this time, the magnetic induction intensity at the upper surface of the workpiece 7 is 70mT, and the others are the same as in Embodiment 1.

[0029] Implementation effect: the processing speed is 10mm / min before compound machining, and 12.33mm / min after permanent magnetic field EDM small hole compound machining, with a speed increase rate of 23.3%.

Embodiment approach 3

[0030] Embodiment 3: Change the vertical distance between the magnetic guide 5 and the workpiece to be 25mm. At this time, the magnetic induction intensity at the upper surface of the workpiece 7 is 40mT, and the others are the same as in Embodiment 1.

[0031] Implementation effect: the processing speed is 10mm / min before composite machining, and 10.30mm / min after permanent magnetic field EDM small hole composite machining, with a speed increase rate of 3%.

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PUM

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Abstract

The invention provides a method of permanent magnetic field electric spark small hole compound processing and a device thereof, pertaining to the field of special processing, in particular to a technical proposal of a method of permanent magnetic field electric spark small hole compound processing and a device thereof, which is mainly used for the processing of high-speed electric spark small hole of magnetic conductive material. The device of the invention consists of a magnetic guider, a magnetic guider fixed base (non-magnetic conductive material) and a fastening screw (non-magnetic conductive material). The magnetic guider which is arranged above a workpiece has magnetization on corrosion removed metal particles and after the particles are magnetized, the discharging interval speed isincreased under the effect of magnetization, thus preventing the non-magnetic guider from blocking the circumfluence to the hole and further avoiding the second discharge of the hole. The invention has the advantages of improving the interval discharging conditions, avoiding the accumulation of corrosion removed product in the processing area and the arcing and short circuit caused by over-high concentration of the corrosion removed product, ensuring the stable process, increasing the processing speed and integrating the electrode guider and the discharging condition improver. Furthermore, the invention also has the advantages that the lathe structure is compact, the installation and replacement are convenient, the cost is low and the promotion is easy.

Description

1. Technical field [0001] The invention relates to a permanent magnetic field electric discharge small hole composite processing method and device, which belong to the field of special processing, and specifically relate to a permanent magnetic field electric spark small hole composite processing method and a technical scheme of the device, which are mainly used for high-speed electric discharge of magnetic conductive materials Small hole processing. 2. Background technology [0002] Holes play an important role in the field of machining. According to statistics, hole processing accounts for about one-third of the total machining. In recent years, with the continuous improvement of the requirements for the miniaturization and precision of machining, especially with the development of materials towards high strength and high hardness, it is often necessary to process small holes with relatively large depth and diameter on these difficult-to-machine materials. Since EDM is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H7/38B23H9/14
Inventor 曹明让李文辉杨胜强王燕青马丽华
Owner TAIYUAN UNIV OF TECH
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