Titanium alloy special-shaped electrolytic machining fixture

A tooling fixture and titanium alloy technology, applied in the field of titanium alloy special-shaped cavity electrolytic machining fixtures, can solve the problems of poor processability of titanium alloy materials, low cavity removal efficiency, affecting surface roughness, etc., and achieve low cost and reduce impurities. The effect of dispersing corrosion and improving processing quality

Inactive Publication Date: 2019-01-25
CHENGDU AIRCRAFT INDUSTRY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the machinability of titanium alloy materials is poor, the tool wear is large during milling, the removal efficiency of the large cavity margin is low, and there is mechanical cutting residual stress on the cavity surface, which is prone to deformation
At the same time, titanium alloy has strong self-passivation, and it is easy to form a passivation film on the surface of the workpiece during electrolytic machining, which makes the overpassivation potential higher, the passivation current low, and the processing is more difficult; during the processing, especially at low current density, it is easy to form Pitting affects surface roughness

Method used

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  • Titanium alloy special-shaped electrolytic machining fixture
  • Titanium alloy special-shaped electrolytic machining fixture
  • Titanium alloy special-shaped electrolytic machining fixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1~Figure 7 As shown, a titanium alloy special-shaped cavity electrolytic machining tooling fixture includes a cathode 1, a cathode rod 2, a back pressure cylinder 3 and a fixture base 4 arranged in sequence; one end of the cathode rod 2 extends into the back pressure cylinder 3 Inner and interference fit with the back pressure cylinder 3, the end of the back pressure cylinder 3 away from the cathode rod 2 is sealed with the clamp base 4, and the end of the cathode 1 is fixedly connected with the end of the cathode rod 2 extending into the back pressure cylinder 3 , and the cathode 1 extends toward the fixture base 4; the fixture base 4 is provided with a workpiece positioning hole 41 and a circular hole 42 horizontally intersecting the workpiece positioning hole 41, and the diameter of the circular hole 42 is not larger than the cathode cavity 33 The inner diameter of the circular hole 42, the workpiece positioning hole 41 communicates with the back pres...

Embodiment 2

[0049] This embodiment is improved on the basis of Embodiment 1, and the improvement is that: the side of the clamp base 4 away from the back pressure cylinder 3 is provided with a plurality of set screws 43 threadedly connected with the clamp base 4, so The set screw 43 extends into the workpiece positioning hole 41, and the diameter of the circular hole 42 is not greater than the inner diameter of the cathode chamber 33.

[0050] The set screw 43 compresses the titanium alloy workpiece 100 so that the titanium alloy workpiece 100 will not move during the machining process, and at the same time prevent the electrolyte from seeping out along the workpiece positioning hole 41 during the electrolytic machining process.

[0051] Other parts in this embodiment are basically the same as those in Embodiment 1, so details will not be repeated one by one.

Embodiment 3

[0053] This embodiment is improved on the basis of Embodiment 2, and the improvement is that: the side of the clamp base 4 away from the back pressure cylinder 3 is provided with a pressure plate 44, and the circular hole 42 is formed through the clamp base 4 Circular through hole, the area of ​​described pressing plate 44 is greater than the area of ​​circular hole 42 so that pressing plate 44 can cover circular hole 42 completely, and described set screw 43 is threadedly connected with pressing plate 44 and stretches into workpiece positioning hole 41, for The titanium alloy workpiece 100 is pressed. A plurality of threaded holes are also provided around the pressing plate 44 , and the pressing plate 44 is fixedly connected to the fixture base 4 through screws or screw rods passing through the threaded holes.

[0054] Other parts in this embodiment are basically the same as those in Embodiment 2, so details will not be repeated one by one.

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PUM

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Abstract

The invention discloses a titanium alloy special-shaped electrolytic machining fixture, which comprises a cathode, a cathode rod, a back pressure barrel and a fixture base in sequential arrangement. One end of the cathode rod extends into the back pressure barrel and is in interference fit with the back pressure barrel, and one end, away from the cathode rod, of the back pressure barrel is in hermetical connection with the fixture base. The tail end of the cathode is fixedly connected with one end, extending into the back pressure barrel, of the cathode rod, and the cathode extends towards thefixture base. The fixture base is provided with a workpiece positioning hole communicated with the back pressure barrel. The cathode rod is internally provided with a liquid inlet hole, the middle ofthe cathode is provided with a liquid outlet hole communicated with the workpiece positioning hole, and the liquid inlet hole is communicated with the liquid outlet hole. The titanium alloy special-shaped electrolytic machining fixture is simple in structure and stable and efficient in processing process.

Description

technical field [0001] The invention relates to the technical field of electrolytic machining, in particular to a fixture for electrolytic machining of a titanium alloy special-shaped cavity. Background technique [0002] Titanium alloys have the advantages of high specific strength, good thermal stability, and strong corrosion resistance. They are mainly used for rocket engine casings, aeroengine compressor disks and blades, various structural forgings and fasteners, etc. [0003] Electrolytic machining is a process technology that uses the principle of anodic electrochemical dissolution to remove materials and finally shape parts. This technology is not limited by the mechanical properties and mechanical properties of the workpiece material, and the surface processing quality of the parts is high. It has the advantages of no stress, no heat-affected zone, and no loss of tool cathodes. It is widely used in aerospace, microelectronics, biomedicine, mold manufacturing, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H3/00B23H3/10B23H11/00
CPCB23H3/00B23H3/10B23H11/003
Inventor 李国华张盛左敦稳余泽卢文壮杨振文苟绍轩
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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