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A kind of method and device of annular laser belt impact strengthening hole wall

A technology of impact strengthening and laser banding, which is applied to the strengthening of the inner wall of through holes and blind holes. The use of circular laser bands to impact and strengthen the hole wall can solve the problems of reducing surface fatigue strength, blind holes, and ablation of hole walls.

Active Publication Date: 2016-03-09
惠州市旭辰家具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned five inventions all insert the reflection cone from one end of the hole, and the laser is incident from the other end of the hole for strengthening, that is, only through-holes can be impact-strengthened
[0005] The application number is 201310245984.5, and the name is a hidden surface laser shock strengthening method and device, which uses a full mirror to scan the inner wall step by step for laser shock strengthening treatment, and can perform impact strengthening on blind holes. Devices such as fixtures, workbenches, and feeding devices limit the method to be used only for intensive treatment of larger-sized blind holes, and cannot handle small-sized blind holes.
The application number is 200910213599.6, and the name is a complex surface strengthening method and device based on laser shock wave technology. It proposes to use the suspension liquid as the laser absorbing material to replace the absorbing layer and the constraining layer. This method can shock strengthen the blind hole , but the high temperature and high pressure plasma explosion will ablate the hole wall and produce unfavorable structures such as thermal cracks that will reduce the surface fatigue strength

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  • A kind of method and device of annular laser belt impact strengthening hole wall
  • A kind of method and device of annular laser belt impact strengthening hole wall

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Embodiment 1

[0029] A device for laser shock strengthening of the hole wall of a blind hole using the present invention such as figure 1As shown, it includes a pulsed laser 1, a light pipe 3, a 45° total reflection mirror 4, a ring laser belt adjustment unit 5, a protective cover 13, a fixture 14, a workbench 17, a water spray device 19, a controller 20 and a signal line 23 One end of the light pipe 3 is fixed on the pulse laser 1, and the other end is connected with the protective cover 13, and the light outlet of the pulse laser 1 is provided with a 45° total reflection mirror 4,45° total reflection fixed on the light pipe 3 The lower part of 4 is facing the ring laser belt adjustment unit 5, and the ring laser belt adjustment unit 5 is installed inside the protective cover 13. The protective cover 13 is made of light-transmitting tempered glass material. The workbench 17 is located directly below the protective cover 13. The workpiece 16 Clamped on the fixture 14, the fixture 14 is fix...

Embodiment 2

[0037] The device that carries out the hole wall laser shock peening treatment of through hole with the present invention is identical with embodiment 1, and difference is that, the angle of conical surface of cone total mirror 12 head is a, a=90 °, as figure 2 shown.

[0038] Implement the concrete work process of the present invention as follows:

[0039] (1) The workpiece 16 is clamped on the fixture 14, ensuring that any hole is facing upwards, and the movement of the worktable 17 is controlled, thereby driving the workpiece 16 to move, so that the protective cover 13 with the ring laser belt adjustment unit 5 inside is opened from the upper hole. Extend into the bottom of the hole to be strengthened;

[0040] (2) Set the pulse laser parameters and ring laser band parameters, where the laser pulse energy is 60J, the laser pulse width is 60ns, the ring laser band width is 30mm, the water spray device 19 sprays water on the upper surface of the through hole, and the pulse ...

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Abstract

The invention discloses a method and a device for strengthening the wall of a hole by impacting a ring laser belt, and relates to the field of laser shock strengthening of the hole wall of a small hole; The protective cover with the adjustment unit goes deep into the hole from one end of the hole, so that the ring laser belt irradiates on the hole wall coated with the absorbing layer to generate a plasma explosion. The impact strengthening of the hole wall is carried out; the position of the ring laser belt is moved by the worktable to complete the impact strengthening of the entire hole wall. The invention is suitable for the impact strengthening treatment of the walls of various apertures. At the same time, it can not only impact strengthen the walls of through holes, but also perform impact strengthening treatment on the walls of blind holes.

Description

technical field [0001] The invention relates to the field of hole wall strengthening and modification, in particular to a method and device for strengthening the hole wall by impacting with a circular laser belt, and is especially suitable for strengthening the inner wall of through holes and blind holes with serious stress concentration. technical background [0002] Laser shock strengthening is a new type of material surface strengthening technology. It uses the high-pressure shock wave generated by the interaction between the laser beam and the absorbing layer coated on the surface of the workpiece as the force source to make the surface material of the workpiece plastically deformed, thereby making the structure of the surface material dense. and form a residual stress layer with a certain depth. The residual stress layer can effectively eliminate the internal stress concentration of the material and inhibit the initiation and expansion of cracks, and can significantly im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D7/00C21D1/09
Inventor 温德平戴峰泽张永康
Owner 惠州市旭辰家具有限公司