JPH04262219A - Unbalance removing method in dynamic balancer machine - Google Patents

Abstract

PURPOSE:To facilitate the automation of measuring work and to improve measuring accuracy by removing the amount of the eccentricity of a tire rim which is obtained from the dynamic balance values and the phase angles before and after the rotation of a tire to be measured from the measured value of the tire to be measured. CONSTITUTION:A tire W to be measured on which a mark 4 for detecting the phase is attached to a main shaft 1 of a dynamic balancer machine through a rim 1a. The tire W is rotated by an arbitrary angle, and the phase angle of the tire W is changed. The magnitudes of the dynamic balance values and the phase angles of the tire W before and after the rotation are obtained with a mark sensor 6. The magnitudes of the dynamic-balance values and the phase angles obtained in this way are operated with a control device, and the amount of eccentricity of the tire rim is obtained. The amount of eccentricity is removed from the measured value of the tire W. Thus, the amount of the unbalance of the tire W in the dynamic balancer machine is removed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for removing unbalance in a dynamic balancer machine that measures the characteristics of a molded tire, and more specifically, the amount of unbalance of the main shaft and the amount of eccentricity of the rim in the dynamic balancer machine. The present invention relates to an unbalance removal method in a dynamic balancer machine that can automatically perform highly accurate measurements by removing the influence of

0002

[Prior Art] Conventionally, in a dynamic balancer machine that measures the characteristics of a molded tire, although it is desired to measure only the characteristics of the tire to be measured, other factors such as the amount of unbalance of the main shaft in the dynamic balancer machine and the It was difficult to perform highly accurate measurements due to the influence of the eccentricity of the rim.

0003

[Problems to be Solved by the Invention] For this reason, in the past, in order to accurately align the measured tire and rim,
A worker enters the dynamic balancer machine,
The alignment required a lot of time and effort, and the measurement work involved turning the measurement tire every 180 degrees, resulting in extremely low work efficiency.

0004

[Object of the Invention] The present invention was devised in view of the above-mentioned problems in the prior art, and eliminates the need for a worker to enter the dynamic balancer machine to align the tire and rim to be measured. It is an object of the present invention to provide a method for removing unbalance in a dynamic balancer machine, which can automatically remove and measure the amount of unbalance in the dynamic balancer machine by rotating a tire at an arbitrary angle.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention attaches a mark for detecting the phase to a measuring tire in advance, and attaches this measuring tire to the main shaft of a dynamic balancer machine. The phase angle of the tire is changed by rotating it by an arbitrary angle, and the magnitude of the dynamic balance value before and after rotation of the measurement tire and the phase angle are determined by the mark sensor, and the magnitude of the dynamic balance value determined by the mark sensor, The amount of eccentricity of the tire rim is calculated by calculating the phase angle with the control device, and by removing this amount of eccentricity from the measured value of the measured tire, it is possible to remove the amount of unbalance of the measured tire in the dynamic balancer machine. This is a summary.

[0006]

[Operation of the Invention] The present invention is constructed as described above, and there is no need to phase the measured tire and rim at an accurate angle as in the conventional case, so automation of measurement work is facilitated, and As a result of being able to accurately determine the phase, measurement accuracy is improved, and the influence of the amount of unbalance of the spindle and the amount of eccentricity of the rim can be detected in a short time, making it possible to significantly improve work efficiency.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a perspective view of a measurement tire attached to the main shaft of a dynamic balancer machine.
FIG. 2 is a plan view of a centering device in the pre-process of supplying measurement tires to the dynamic balancer machine, and FIG. 3 is a side view of the centering device. A measurement tire W, to which a plurality of load cells 3 are attached and a mark 4 for detecting a phase attached to a main shaft 1, is rotationally driven via a drive motor 5.

[0008] Also, a measurement tire W attached to the main shaft 1
A mark sensor 6 is disposed above the tire W to measure the magnitude of the dynamic balance value and the phase angle before and after rotation of the measurement tire W. Further, the centering device 7 has centering arms 9a, 9 at the tip of the centering cylinder 8, as shown in the figure.
Four support arms 10 that sandwich the measurement tire W via the so-called crab are attached so as to be expandable and retractable, and as shown in FIG. Motor pulley 1 that rotates in the state
1 (drive roller) is attached.

Next, a method for removing the unbalance amount of the measurement tire W attached to the main shaft 1 of the dynamic balancer machine as described above via the rim 1a will be explained. First, as shown in FIG. 1, a mark 4 for detecting the phase is attached to the measurement tire W in advance.
is attached to the main shaft 1 of the dynamic balancer machine via the rim 1a. This measurement tire is rotated by an arbitrary angle to change the phase angle of the tire, and the magnitude of the dynamic balance value before and after rotation of the measurement tire and the phase angle are determined by a mark sensor, and the dynamic balance value determined by the mark sensor. The amount of eccentricity of the tire rim is determined by calculating the size of The purpose is to remove them.

The phase angle of the tire is changed by rotating the measurement tire W by an arbitrary angle θ, and the magnitude of the dynamic balance value and the phase angle before and after rotation of the measurement tire are determined by the mark sensor 6. This mark sensor 6
The magnitude of the dynamic balance value obtained by This is to remove the unbalance amount of the measurement tire W in the balancer machine and perform highly accurate measurement.

Next, a specific measuring method will be explained with reference to FIGS. 4 to 6. First, if the dynamic balance value of the measurement tire W measured by a dynamic balancer machine is vector a, the dynamic balance value when rotated by a predetermined angle is vector b, and the vector of the dynamic balance value of the measurement tire W itself is vector A. , the phase is shifted by ω from the state of FIG. 5 as shown in FIG. 6, and the vector A is rotated so that it overlaps with A'. Note that ω represents the difference between the mark angles of the tires to be measured, and θ represents the difference in angle at the maximum point of the dynamic balance minus ω. next,
The calculation by the control device can be obtained from the following equation.

0012

As described above, in the present invention, the magnitude of the dynamic balance value and the phase angle before and after the rotation of the tire to be measured are determined by the mark sensor 6. By calculating the magnitude of the dynamic balance value obtained by this mark sensor 6 and the phase angle by a control device (not shown), there is no need to perform phase alignment between the measured tire and rim at an accurate angle as in the conventional method. , it becomes easier to automate the measurement work, and the phase of the tire to be measured can be determined accurately, resulting in improved measurement accuracy.Furthermore, the effects of spindle imbalance and rim eccentricity can be detected in a short time. This can significantly improve work efficiency.

[0014]

[Effects of the Invention] As described above, the present invention attaches a mark for detecting the phase to the measurement tire in advance, attaches the measurement tire to the main shaft of a dynamic balancer machine, and rotates the measurement tire at an arbitrary angle. The phase angle of the tire is changed, the magnitude of the dynamic balance value before and after rotation of the measuring tire, and the phase angle are determined by a mark sensor, and the magnitude of the dynamic balance value determined by the mark sensor and the phase angle are determined by the control device. By calculating the amount of eccentricity of the tire rim and removing this amount of eccentricity from the measured value of the measured tire, the unbalance amount of the measured tire on the dynamic balancer machine was removed. It has excellent effects.

(a). Since there is no need to phase match the measured tire and rim at an accurate angle as in the past, automation of the measurement work becomes easy. (b). As a result of being able to accurately determine the phase of the tire to be measured, measurement accuracy is improved. (c). The influence of the amount of unbalance of the spindle and the amount of eccentricity of the rim can be detected in a short time, and work efficiency can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a measuring tire attached to a main shaft in a dynamic balancer machine.

FIG. 2 is a plan view of a centering device in a pre-process of supplying a measuring tire to a dynamic balancer machine.

FIG. 3 is a side view of the centering device.

FIG. 4 is an explanatory diagram of a method for removing an unbalance amount of a measured tire in a dynamic balancer machine.

FIG. 5 is an explanatory diagram of a method for removing an unbalance amount of a measured tire in a dynamic balancer machine.

FIG. 6 is an explanatory diagram of a method for removing an unbalance amount of a measured tire in a dynamic balancer machine.

[Explanation of symbols]

Claims (1)

[Claims] Claim 1: A mark for detecting the phase is attached to the measurement tire in advance, the measurement tire is attached to the main shaft of a dynamic balancer machine, and the measurement tire is rotated by an arbitrary angle to change the phase angle of the tire. The magnitude of the dynamic balance value and the phase angle before and after rotation of the tire are determined by the mark sensor, and the magnitude of the dynamic balance value determined by the mark sensor and the phase angle are calculated by the control device to determine the eccentricity of the tire rim. A method for removing unbalance in a dynamic balancer machine, characterized in that the unbalance amount of a tire to be measured in the dynamic balancer machine is removed by determining the amount of eccentricity and removing this eccentricity from the measured value of the tire to be measured.