SU1453167A1 - Mark for checking rectilinearity - Google Patents

Abstract

This invention relates to measurable. technology and can be used to control the straightness of objects in mechanical engineering. The purpose of the invention is to increase the accuracy of measurements and reduce the complexity of measurements due to the increased resolution of the brand. The mark is mounted on the object to be monitored by the tip of the cone 2 in the direction of the radiation source 10. The orientation of the axis of the cone along the triggering of the rays is carried out by bringing the focal spot of the lens 5 into the center O of the aperture 4. The alignment of the cone 2 and the optical axis of the beam is achieved by setting it in a position where all four light guides 9 are illuminated in the same way, i.e. the same number of fibers 7 is illuminated, and the same values are displayed on all axes on the scale. If there is an offset from the linearity of the object being monitored, the axis of the cone 2 is shifted relative to the beam of rays, and the radiation enters a different number of optical fibers 7 and changes the illumination of the measuring scale. If the price of its division is 1tg ai, where 1 is the distance between the centers of the optical fibers on the ruler 9, oL is the angle at the apex of the cone, then the difference between the readings from the upper and lower semi-axes Y will give the value of the offset of the cone axis in the vertical plane. 3 il. , about

Description

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I The invention relates to a measurement technique and can be used (b to control the linearity of tHKeHHbix objects in mechanical engineering.

The purpose of the invention is to improve the accuracy of measurements to reduce the complexity of measurements by increasing the brand resolution.

FIG. Figure 1 shows a schematic diagram of the mark when the target sign is mixed relative to the axis of the collimated beam of rays; in fig. 2 view A in FIG. 1I in FIG. 3 - the design of the target sign.

The stamp contains a support 1 and a target mark, in the form of a truncated cone 2 with a base 3, in which a central opening 4 is made, and the lens is mounted at the entrance

, the focal distance of which is optically matched with the surface of the semitransparent screen 6, is mounted on the end surface of the base 3. In a cone 2 and base 3, blocks of light guides 7 are laid out, laid out in mutually perpendicular squares 1 L x х (horizontal and vertical Tsoi), the input ends of which are placed with equal step on the lateral surface of cone 2, and the output ends are located on a translucent screen 6 and d6pa3yroT measuring scale 8. The input Hfcie ends of the optical fibers 7 of each block l | hedgehog along lateral surface of the co-Hjyca on one line and form a four-pie fiber optic ruler 9, the cost of which is equal to the distance between and the centers of the optical fibers. The target sign Optically interacts with the source of the collimated radiation and: both of them are installed on the WIOM object 11, controlled by

The control of the object is carried out as follows.

The mark is installed on the controlled object by the tip of the cone 2 in the direction of the radiation source 10. Cone 2 is inserted into a collimated radiation source beam, which is fixed and parallel to the plane of the object being monitored. The maximum diameter of the cone 2 must be greater than the diameter of the light beam, i.e. the entire beam diameter is overlapped with a cone. Orientation of the axis of the cone along the beam of rays is performed by moving the focal spot of the lens 5 to the center O of the hole 4, this

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angular displacements of the target sign relative to the optical axis of the light beam are eliminated. The coaxiality of the cone 2 and the optical axis of the beam is achieved by setting it in such a position that all four light guide strips 9 are illuminated by the light beam equally, i.e. on each, the same number of optical fibers 7 is illuminated. With this on a scale of 8, the same values are displayed on all axes.

If there is an offset from the linearity of the object being monitored, the axis of the cone 2 is displaced relative to the beam of rays. In this case, the upper and lower edges of the beam intersect with the corresponding light guide lines 9 at points remote from the top of the cone at different distances. As a result, the light radiation falls into a different number of optical fibers 7 in the upper and lower optical fiber lines 9, which leads to a corresponding change in the illumination of the measuring scale. If we calibrate the measuring scale in such a way that the price of dividing it is 1 tg v, where 1 is the distance between the centers of the optical fibers on the ruler 9, oi is the angle at the tip of the cone, then the difference between the readings,. removed from the upper and lower semi-axes Y, gives the value of the displacement of the axis of the cone in the vertical plane.

By increasing the accuracy of measurements, the amount of defective products decreases by a factor of 1.5–2 and increases its quality. Accelerating the process of removing information and improving the working conditions with this brand reduce the labor intensity of measurements 1.3-1.6 times.

Claims (1)

Invention Formula A mark for controlling the straightness, containing a target sign made in the form of a truncated cone with a central hole and a translucent screen fixed on the base of the cone, and a source of collimated light emission, which is designed to increase the accuracy of measurements and reduce labor intensity. blocks of light guides laid out in mutually perpendicular planes of the target mark so that the input ends of the light guides are arranged with equal step along the side surface of the cone, parallel "-3.2 "2.3