JPS5817306A - Switch for limiting displacement of crankshaft in mass centering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch for limiting displacement of a crankshaft when performing centering in a mass centering machine. The mass centering machine has a support base and a rocking bridge supported by a spring on the support base, in which the crankshaft to be mass centered is rotated 9 degrees from the axis of the mass centering machine. the surfaces of the two parts of the crankshaft that rotate with the axis of the mass centerer and rotate with the rotation of the axis of the mass centerer such that the axis of the crankshaft is free of the system's inherent eccentricity with respect to the axis of the mass centerer; It can move up to the minimum radius of one point.

West German patent application publication P 2823219 (8) regarding a method and apparatus for removing a rotating body with non-uniform mass distribution along the axis of the apparatus
No. 497), the first type of device became known. In the above device, when rotating the surface of a rotationally symmetrical part that includes the axis, the probe detects radial waves. It is proposed to scan without contact. This scanning serves the purpose of ensuring the displacement of the crankshaft up to the minimum radius of rotation of a point on the surface of the two parts of the crankshaft which are rotated by the center rotor of the center of mass lifter. If such a scan is not carried out, if there is an extreme imbalance in the unmachined crankshaft, it is possible to raise the center of mass of the crank, but it is possible to increase the center of mass of the crankshaft. A large geometric eccentricity appears.

Thereby, there is a risk that the subsequent machining of the main bearing journal or crank journal will not be possible, and that debris will be formed on the surface of the part of the crankshaft to be machined. This is because the radius from the axis of the rank axis is less than the minimum allowable radius of rotation re at one point due to the geometrical inclination of the axis of the rank axis resulting from the height of the center of mass due to misalignment.

The apparatus and method for heightening the center of mass of a longitudinally elongated object such as a crankshaft listed in the above-mentioned published application are as follows:
No equipment is included to measure and control the minimum turning radius. The present invention, on the other hand, definitely avoids the large geometrical eccentricity that occurs when raising the center of mass, which causes flow when finishing the crankshaft. It is based on the issue. This task involves installing two highly focused optical transmitters on a swinging bridge, and transmitting light +ili! to a receiver also placed on the swinging bridge. the light beam intersects the axis of the center of mass lifter in a minimum radius interval, and the displacement is stopped when the receiver first receives the light through the crankshaft section of the housing. This is solved by The switch according to the invention therefore makes it possible to maintain the current position of the crankshaft, which is to be raised in its center of mass, and also to reduce the spacing between the components of the crankshaft by arranging an additional transmitter/receiver. can also be managed. This thereby avoids spills caused by large geometrical eccentricities during the subsequent machining of the crankshaft. By arranging the highly focused light transmitter and receiver on the swinging bridge, the complex vibrations of the swinging bridge do not affect the control beam.

A development of the invention consists in pre-arranging at least one additional highly focused optical transmitter and receiver for ascertaining the curve V of the crankshaft.

By forming the crankshaft in this way, the center of mass of the "curved" crankshaft can be raised, and the crankshaft can be transported to subsequent processing steps. This means that if the bending of the crankshaft causes the beam to reach the corresponding receiver even when there is a quantity of material that can be processed in another part of the crankshaft, it is possible to monitor an already curved crankshaft. This is because when adjusting large geometrical eccentricities, by monitoring together with this additional beam switch, and also in this case, the interruption of the displacement process takes place immediately.

In a further development of the invention, it is proposed that the light beam intersects the axis of the center of mass lifter at an oblique angle.

This configuration allows flexibility when adding transmitters and receivers.

The invention will be explained in more detail in the following drawings: Figure 1 shows a cross-section across the swinging bridge of the center of mass elevator; A plan view is shown.

A transmitter 3 and a corresponding receiver 4 are placed in the connecting frames 1 and 2 of the swing bridge. Laser radiation is suitable as highly focused light, which is detected in a photovoltaic cell configured as a receiver. When the light impulse is received, it is passed through the limit value switch 5ff into the unbalance measuring device 6 of the mass centering machine, and via the switch 7.8 it is immediately stopped by the stepping motor 10.111 which produces a displacement of the crankshaft 9. With the crankshaft 9 held in this position, the hole is drilled by a drill 23, 24 working in the axis of the mass centering machine in front of the above-mentioned crankshaft end. (See Figure 2) In the embodiment presented, the crankshaft is arranged in a so-called cage 12.
(See Figure 2). The cage 12 is equipped with vertical crossbars 13, 14, 15' which extend over the entire length of the crankshaft 9 to be tested. A motor 10.11 and a clamping arm 16.17t are arranged on this cage. In this case, when the crankshaft rotates in space in response to the static and dynamic imbalance measured over its entire length, the anno (displacement) is applied in the aforementioned manner, taking into account the switch according to the invention, until the lance is eliminated. A pair of motors lO and 11 and a pair of clamp arms 1 on each displacement adjustment surface 25, 26 so that the
6.17'fr Prepare in advance. Vertical cross par 13
．． The shading produced on the crankshaft by 14.15 - two shadings are designated by reference numerals 20 and 21 in the example - has only a negligible effect on the functioning of the switch according to the invention.

As shown in FIG. 2, the end journal 28 of the crankshaft 9
is scanned by a transmitter-receiver system running diagonally.

The position of the transmitter/receiver system is such that the highly focused beam transmitter is located at a predetermined minimum distance re from the axis 22 of the mass centering machine.
It is adjusted so that it crosses the line.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the swing bridge of the mass centering machine, and FIG. 2 is a plan view of the swing bridge with the crankshaft attached. 1.2 is a swing bridge, 3.4 is a transmitter and a receiver, 9 is a crankshaft, 22 is a centering machine shaft, and 29 is a light beam. Proceedings Amendment Written September 3, 1981 Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of the case Patent application 1982-95576λ Name of the invention Switch 3 for limiting the displacement of the crankshaft in a mass 6 output machine , Relationship with the case of the person making the amendment Patent applicant address West Germany 6100 Darmstadt Landberg Strasse 55

Claims (1)

[Claims] 1) In a mass center circular machine equipped with a support base and a swing bridge supported on the support base via a spring, a crankshaft (9) to be mass centered, The mass center rotates around the axis of the centering machine, and the crankshaft is connected to the axis of the machine centering machine (
a), the quality of the centering machine can be adjusted up to the minimum radius of rotation of a point on the surface of two selected shaft sections of the crankshaft that rotate without any inherent eccentricity around the axis of the centering machine; This is a switch for limiting the displacement operation when the mass center of the crankshaft (9) rotates.
) are installed, and the transmitter sends a swinging bridge (1,
In the receiver (4) installed opposite the Yoshi transmitter in 2),
Sending a light beam (a), and causing the light beam to intersect the mass center circle and the machine axis (a) at a distance of the minimum radius (re),
Furthermore, the switch is characterized in that the displacement operation is stopped when the light beam first reaches the receiver (4) via the crankshaft. 2) Is the crankshaft (9) bent? Claim 1, characterized in that at least one second transmitting/receiving mechanism (3, 4) is provided for emitting a highly focused light beam for detection.
Switches listed in section. 3) A switch according to claim 1 and/or 2, characterized in that the light beam intersects the centering axis (2) at an oblique angle.