SU1374044A1 - Device for measuring outer cone angle - Google Patents

Abstract

The invention allows non-contact measurement of the angles of the outer cones of the parts. The aim of the invention is to increase the measurement accuracy by increasing the sensitivity of the positioning of the angle indicator relative to the generator of the test cone. A collimated beam of rectangular cross-section with a uniform brightness over the beam section is formed and directed to a mirror 3 mounted at an angle to the beam and performing oscillatory translational movements. The oscillations of the mirror are carried out with the help of an electromagnet 4. Diaphragm njrqoK, reflected from mirror 3, with the help of a shutter 8 installed at the end of the lever 7, and the most controlled part 13. The past part of the beam is received by the photo-receiver 6, amplify it and allocate a variable component which is controlled by the movement of the electric motor 10. A shaft 9 is connected to the electric motor, on which a lever 7 with a shutter 8 is located, shielding the radiation beam. The lever 7 is installed at a right angle to the shaft 9. The rotation of the shaft is controlled by an indicator (P

Description

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torus 11 angle. Turning the lever 7 with the shutter 8 around the shaft 9, there is no change in the intensity of the variable component of the photosignal at the output of the amplifier 12, which corresponds to the exact location of the chrome

The curtains 8 are parallel to the generatrix of the controlled cone 13. For this position of the shutter, a reading is taken of the angle indicator 11, which corresponds to half of the controlled angle, 2 Il.

one

The invention relates to a measurement technique and can be used to measure the angles of the outer cones of parts without contact.

The aim of the invention is to increase the measurement accuracy, which is achieved by increasing the sensitivity of the positioning of the angle indicator relative to the generator of the test cone.

Figure 1 presents the scheme of the device; figure 2 is a view of the light beam, limited to the controlled part and the diaphragm, executed in the form of a curtain.

The device contains a radiation source (not shown), a collimator 1 that forms a parallel beam of rays on the lens of which a slit diaphragm 2 is installed in the form of a rectangle, a mirror 3 mounted for oscillating movement of the electromagnet 4, the power supply unit 3 of the electromagnet, a photodetector 6, a lever 7 with a shutter 8, a shaft 9 of a reversing motor 10, a rotation angle indicator 11, an amplifier 12 of alternating current electrically connected with a photodetector 6 and an electric motor 10.

The drawing also shows a controlled part 13 with an outer cone mounted on the spindle of the cutting machine.

The axis of the electric motor 10 and the indicator 11 is perpendicular to the optical axis of the collimator 1, and the mirror 3 is at an angle of 45 to the optical axis of the collimator 1 and the photodetector 6.

The device is installed on the metal-cutting machine so that the optical axis of the photodetector 6 is serpeno

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it is dicted to the axis of the machine spindle, and the beam of rays partially overlaps with the controlled part 13.

The device works in the following way.

A parallel beam of rays from a source, formed by a collimator 1 and a rectangular diaphragm 2, is directed to a mirror 3, reflecting from which, after passing through the test piece 13, is partially diaphragmed by it and the shutter 8, it hits the photoreceiver 6. The coil of the electromagnet 4 supplied with alternating current from power supply unit 5. The core of the electromagnet 4 with a mirror 3 rigidly bonded to it, vibrates with the frequency of the supply current. When the mirror 3 is vibrated, the radiation beam is displaced parallel to itself in the plane of the shutter 8. When the edge of the shutter 8 is not parallel with respect to the generator of the controlled cone, the radiation beam moves to different degrees of its diaphragm by the shutter 8 and the controlled part 13, which, B turn, causes a change signal at the output of the photodetector 6. Periodic movement of the radiation beam by the mirror 3, carried out by oscillating movement of the core of the electromagnet 4, leads to the appearance of alternating oh the output of the amplifier 12 of the alternating current.

Claims (1)

Depending on the phase of the alternating current, the reversible electric motor rotates in the right direction, turning the shaft 9, the angle indicator 11 and the lever 7 with the shutter 8. At the moment when the edge of the shutter 8 turns out to be parallel to the generator of the controlled cone in the drawing plane (Fig „2), the cross section The transmitted beam will have the form of a parallelogram, the area of which does not change when moving the mirror 3, and, consequently, the beam of rays along the axis of the controlled cone. Since the radiation source and collimator 1 create uniform energy illumination along the diaphragms, the amount of flux from the rays falling on the photodetector 6 also remains constant and the voltage at the output of amplifier 12 is absent, which causes the motor 10 to stop. read the reading on the angle indicator 11, which corresponds to half the angle of about. cone controlled parts 13.. The device is preset with a cylindrical model detail. Formula of gain Device for measuring the angle of the outer cone, containing subsequently // the radiation source, collimator, diaphragm and photodetector, amplifier, shaft mounted for rotation around its axis, angle of rotation indicator connected to one end of it, shaft rotation mechanism and lever oriented perpendicular to the shaft axis and connected at one end to the diaphragm, and the other with a shaft, characterized in that, in order to improve the measurement accuracy, it is provided with a mirror installed at an angle of 45 ° to the axis of the collimator with the possibility of oscillatory translational movement, electr a magnet coupled to the mirror, and the electromagnet power supply, diaphragm vshol- Nena a shutter movement mechanism - a reversible motor electrically connected to the amplifier, and the collimator is mounted perpendicular to the shaft axis. fie.g