CN201697609U - Small size hole center coordinate measurement conversion parts - Google Patents

Abstract

The utility model discloses a small-sized aperture center coordinate measurement conversion part, the conversion part is a ladder-shaped part composed of a detection part 14 and a positioning shaft 15, and the outer circle of the positioning shaft 15 is slidingly matched with the small-diameter positioning hole of the detected part There is an optical detection blind hole 13 in the detection part 14, and the optical detection blind hole 13 is concentric with the positioning axis 15; The conversion part of the utility model can accurately measure the central coordinates of the small-sized aperture, and improves the accuracy of the installation position of the small-sized aperture positioning part in the fixture and the accuracy of retesting and repairing.

Description

Small size hole center coordinate measurement conversion parts

technical field

The utility model belongs to the measurement technology and relates to a tool for measuring the center coordinates of small-sized holes. the

Background technique

Since the size of the tail rod of the existing cursor base is generally larger than 5 mm and is an integer size, the existing optical measuring instrument is limited by the size of the tail rod of the cursor base, and can only measure the center coordinates of the round hole with an integer aperture of more than 5 mm. However, the positioning aperture of the positioning and mounting parts in the fixture is often less than 5 mm and has a non-integer size. The existing optical measuring instruments cannot measure these aperture coordinates, and irregularities in the fixture, the installation position of the small-aperture positioning part and the working coordinate system of the fixture often occur. There is a problem of deviation. the

Contents of the invention

The purpose of this utility model is to provide a conversion piece that can accurately measure the central coordinates of small-sized or irregular apertures, so as to improve the accuracy of the installation position of small-sized or irregular aperture positioning pieces in the fixture and the accuracy of re-inspection and repair. sex. the

The technical scheme of the utility model is to provide a small-sized aperture center coordinate measurement conversion part, which is characterized in that the conversion part is a ladder-shaped part, which is composed of a detection part 14 and a positioning shaft 15, and the outer circle of the positioning shaft 15 and the detected The small-diameter positioning hole 28 of the component is slidingly fitted; there is an optical detection blind hole 13 in the detection component 14, and the optical detection blind hole 13 is concentric with the positioning shaft 15. the

The thickness tolerance of the detection part 14 is ±0.02 mm; the lower end surface 16 of the detection part 14 is attached to the working upper surface 27 of the tested part 2 during measurement. the

The utility model has the advantages of being able to accurately measure the central coordinates of small-sized apertures, and improving the accuracy of the installation position of the small-sized aperture positioning part in the fixture and the accuracy of re-inspection and repair. the

Description of drawings

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

Fig. 2 is the structure schematic diagram of the detected part of the utility model;

Fig. 3 is a working schematic diagram of the utility model. the

Detailed ways

Below the utility model is described in further detail. the

Referring to Fig. 1, a small-sized aperture center coordinate measurement conversion part is characterized in that the conversion part 1 is a stepped cylindrical shaft-shaped part, composed of a detection part 14 and a positioning shaft 15, and the outer circle of the positioning shaft 15 is in line with the detected part 2 (seeing Fig. 2) small-diameter positioning hole 28 sliding fit; There is an optical detection blind hole 13 in the center of the detection piece 14, and the optical detection blind hole 13 is concentric with the positioning shaft 15. the

The thickness tolerance of the detection part 14 is ±0.02 mm; the lower end surface 16 of the detection part 14 is attached to the working upper surface 27 of the tested part 2 during measurement. the

The detection piece 14 is a cylinder, or other polyhedrons whose upper and lower surfaces are parallel. the

Figure 3 is a working diagram of the conversion part. The working principle of the utility model is: insert the conversion part 1 of the utility model into the small diameter positioning hole 28 of the detected part 2, make the lower end surface 16 of the detection part 14 of the conversion part 1 stick to the working upper surface 27 of the detected part 2 Together, the optical detection blind hole 13 on the upper surface of the detection part 14 of the conversion part 1 is coaxial with the central axis of the small-diameter positioning hole 28 of the detection part 2, and the central coordinates of the small-diameter positioning hole 28 of the detection part 2 and the optical detection of the conversion part 1 The axial distance between the central coordinates of the detection blind hole 13 is the thickness of the detection part 14 of the conversion part 1 . As long as the center coordinates of the optical inspection blind hole 13 are measured by using an optical inspection instrument, the center coordinates of the small-diameter positioning hole 28 of the inspected part 2 can be calculated. the

Claims (3)

1. a small size aperture centre coordinate is measured bridgeware, and the ladder parts that this bridgeware is made up of detection piece (14) and locating shaft (15) is characterized in that, the cylindrical of described locating shaft (15) and the path pilot hole of detected member are slidingly matched; An optical detection blind hole (13) is arranged in the described detection piece (14), and optical detection blind hole (13) is concentric with locating shaft (15).

2. small size as claimed in claim 1 aperture centre coordinate is measured bridgeware, it is characterized in that the thickness deviation of detection piece (14) is ± 0.02mm.

3. measuring bridgeware as claim 1 or the described small size of claim 2 aperture centre coordinate, it is characterized in that described detection piece (14) is a right cylinder, perhaps is the parallel polyhedron of other upper and lower surface.

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