CN202583096U - Laser focusing device for X-ray stress tester - Google Patents

Abstract

The utility model relates to a laser focusing device of an X-ray stress tester. The laser focusing device comprises a bracket, a first laser transmitter, a second laser transmitter, a ray exit tube of the X-ray stress tester and a collimation tube of the X-ray stress tester, and is characterized in that the bracket is sleeved on the ray exit tube of the X-ray stress tester through a hole in the middle of the bracket and is fixed through a fastener; the first laser transmitter and the second laser transmitter are respectively fixed on the two ends of the bracket and incline inwards; and the included angle between the first laser transmitter and the bracket, as well as between the second laser transmitter and the bracket, is Theta equal to arcsin{H1W/(L1H-L2H-L2H1)}. According to the utility model, laser non-contact positioning is adopted, the focusing can be realized through fine adjustment of a Z-axis according to the height of a sample, not only the positioning efficiency is high, the error is small, but also the working efficiency is greatly improved. The focusing device has the advantages of simple structure and convenience in operation.

Description

The laser focusing mechanism of X ray measuring stress instrument

Technical field

The utility model relates to focusing mechanism, is a kind of laser focusing mechanism of X ray measuring stress instrument specifically.

Background technology

The residual stress problems of metal material is greatly to concerning national security, and is little of influencing common people's daily life, therefore receives extensive concern.The X ray measuring stress instrument is a kind of nondestructive stress measurement testing tool commonly used, and it measures lattice strain through the X-ray diffraction technology, tries to achieve macro-stress according to Elasticity again.Need be focused in ray emission source and measured object surface in the X ray measuring stress instrument test process, to reach best test effect.Classic method is to focus with the certain manual focus pin of length, and this method needs operator's visual inspection needle point whether to arrive specimen surface, and error is bigger, and the easy little overshoot of needle point in focus process, destroys the former stress field in measured point.Therefore it is very necessary to design a kind of laser focusing mechanism simple in structure, easy to operate, location efficiency is high, error is little X ray measuring stress instrument.

Summary of the invention

The purpose of the utility model provides a kind of laser focusing mechanism of simple in structure, easy to operate, location efficiency is high, error is little X ray measuring stress instrument.

For realizing above-mentioned purpose; The utility model adopts following technical scheme: a kind of laser focusing mechanism of X ray measuring stress instrument; The ray exit tube, the collimator that comprise support, first generating laser, second generating laser and X ray measuring stress instrument; It is characterized in that the borehole jack of support through its centre is connected on the ray exit tube of X ray measuring stress instrument and through securing member fixes; First generating laser and second generating laser are separately fixed at the two ends of support and slope inwardly, the angle of first generating laser, second generating laser and support be all θ and $\mathrm{\θ}=\mathrm{Arcsin}\left(\frac{H_{1}W}{L_{1}H-L_{2}H-L_2{H}_1}\right)$ , wherein: L ₁-support (1) upper surface length; L ₂-support (1) lower surface length; H ₁-support (1) thickness; H-X X-ray stress analysis X appearance focal length; The mouth of pipe length of W-first generating laser and second generating laser.

Further, in such scheme, said securing member is a nut.

The utility model adopts the contactless location of laser, carries out the fine setting of Z axle according to specimen height and can accomplish focusing, and not only location efficiency is high, error is little, and has significantly improved work efficiency.The utility model is simple in structure, easy to operate.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the vertical view of Fig. 1;

User mode synoptic diagram when Fig. 3 accomplishes focusing for the utility model;

Fig. 4 is the user mode synoptic diagram of the utility model position when higher;

Fig. 5 is the user mode synoptic diagram of the utility model position when on the low side.

Among the figure: the 1-support; 2-first generating laser; 3-second generating laser; The ray exit tube of 4-X ray measuring stress instrument; The collimator of 5-X ray measuring stress instrument; The 6-securing member; The 7-workpiece for measurement.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described, but this embodiment should not be construed as the restriction to the utility model.

The utility model comprises ray exit tube 4, the collimator 5 of support 1, first generating laser 2, second generating laser 3 and X ray measuring stress instrument; The borehole jack of support 1 through its centre is connected on the ray exit tube 4 of X ray measuring stress instrument and is fixing through securing member 6; First generating laser 2 and second generating laser 3 are separately fixed at the two ends of support 1 and slope inwardly, the angle of first generating laser 2, second generating laser 3 and support 1 be all θ and $\mathrm{\θ}=\mathrm{Arcsin}\left(\frac{H_{1}W}{L_{1}H-L_{2}H-L_2{H}_1}\right)$ , wherein: L ₁-support (1) upper surface length; L ₂-support (1) lower surface length; H ₁-support (1) thickness; H-X X-ray stress analysis X appearance focal length; The mouth of pipe length of W-first generating laser and second generating laser.

Preferred embodiment is that in such scheme, said securing member 6 is a nut.

Make the content of detailed description in this instructions, belong to the those skilled in the art known prior art.

Claims (2)

1. the laser focusing mechanism of an X ray measuring stress instrument; The ray exit tube (4), the collimator (5) that comprise support (1), first generating laser (2), second generating laser (3) and X ray measuring stress instrument; It is characterized in that: the ray exit tube (4) that the borehole jack of support (1) through its centre is connected on the X ray measuring stress instrument is gone up and is fixing through securing member (6); First generating laser (2) and second generating laser (3) are separately fixed at the two ends of support (1) and slope inwardly, the angle of first generating laser (2), second generating laser (3) and support (1) be all θ and $\mathrm{\θ}$ $=\mathrm{Arcsin}\left(\frac{H_{1}W}{L_{1}H-L_{2}H-L_2{H}_1}\right),$ Wherein: L ₁-support (1) upper surface length; L ₂-support (1) lower surface length; H ₁-support (1) thickness; H-X X-ray stress analysis X appearance focal length; The mouth of pipe length of W-first generating laser and second generating laser.

2. the laser focusing mechanism of X ray measuring stress instrument according to claim 1 is characterized in that: said securing member (6) is a nut.

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