A portable high-precision coaxiality measuring device
A coaxiality measurement, high-precision technology, used in measuring devices, optical devices, instruments, etc., to achieve the effect of convenient seal selection and consistent working pressure
Active Publication Date: 2019-04-09
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, the present invention discloses a portable high-precision coaxiality measurement device, which solves the problem of convenient and fast precise measurement of the coaxiality of the cylinder in the integrated assembly and test of complex products
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[0031] 1) Overall composition
[0032] The present invention adopts the laser tool (LT, laser tooling) method, uses a highly collimated laser beam to "replicate" the inner wall axis of the cylinder, and measures the positions of intersections I1 and I2 with a PSD device that is automatically sensitive to the spot position (PSD: PositionSensitive Detector, Position Sensitive Detector). The device is composed of: hydraulic tensioning reference fixture 1, laser collimation light tube 2, centering disc 3, and centering ball 4, such as figure 2 shown.
[0033] The portable high-precision coaxiality measurement device proposed by the invention has a measurement capability better than Φ0.1mm.
[0034] 2) Hydraulic expansion reference fixture 1
[0035] The axis of the product cylinder is one of the reference elements for high-precision replication of the measuring device. The present invention uses a highly collimated laser beam to "replicate" the axis of the product barrel.
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The invention provides a portable high-precision coaxiality measuring device, which comprises a hydraulic expansion tightening reference clamp (1), a laser collimation light pipe (2), a centering disc (3) and a centering sphere (4). The hydraulic expansion tightening reference clamp (1) is arranged to the inner wall of a cylinder body to be tested (6) above; the hydraulic expansion tightening reference clamp (1) clamps the laser collimation light pipe (2); light rays emitted by a light source assembly (2-11) irradiate to a spot position sensor (4-2) of the centering sphere (4) from an incident window of a centering sphere structure (4-1); and the centering sphere (4) is arranged in the center of the centering disc (3). The device is suitable for realizing high-precision measurement of coaxiality between small and medium cylinder products; and the device is small in size and can be used conveniently even under condition of poor surrounding view field of the cylinder products.
Description
technical field [0001] The invention relates to a coaxiality measuring device. Background technique [0002] In the field of industrial applications, it is often necessary to accurately measure and adjust the coaxiality between two cylindrical products. [0003] Assume that the two spare cylinder products are in the upper and lower positions, such as figure 1 As shown, a coordinate system is established, with the axis d of the cylinder to be measured below as the x1 axis, a certain point on the x1 axis as the coordinate origin o1, and the y1 axis and the z1 axis as two perpendicular to each other in a plane perpendicular to the x1 axis. direction, and all pass o1 point, the directions of x1, y1, and z1 conform to the right-hand rule; the direction b of the 6 axis of the cylinder to be measured above is the x2 axis, a point on the x2 axis is the coordinate origin o2, and the y2 axis and the z2 axis are Two directions perpendicular to each other in the plane perpendicular to...
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IPC IPC(8): G01B11/27
CPCG01B11/272
Inventor 杨孟飞姚猛郑燕红赵志晖金晟毅韩璐邓湘金
Owner BEIJING INST OF SPACECRAFT SYST ENG