JPS60181604A - Method and apparatus for measuring deformation state of rotary deformed body - Google Patents

Abstract

PURPOSE:To enable an automatic continuous measurement of the amount and position of deformation of a rotary deformed body by rotating a sample at a set speed while a strobe and a camera are operated to catch the image thereof. CONSTITUTION:Samples T<1> and T<2> of a boot for a uniform-speed joint are housed rotatably into a thermostatic chamber 1 and illuminated with a lighting lamp 3 through a milky white semi-transparent plate 4. The samples T<1> and T<2> are rotated with a motor 8 and the rotational speed thereof T<1> and T<2> is detected with a speed detector 9 to control the speed with a speed controller 10. Then, as the samples T<1> and T<2> are rotated at a specified speed, a strobe 15 and a camera 16 are operated intermittently synchronizing the rotational speed thereof and the images of the samples T<1> and T<2> are taken each time light is irradiated at each position on the entire circumference of the samples T<1> and T<2> by a specified angle of rotation. Thus, based on the images, the amount of deformation is automatically measured on each lot of the samples T<1> and T<2> by a video system 17 while the position of the deformation is determined.

Description

Detailed Description of the Invention Technical Field This invention relates to the deformation state of a rotary deformable body such as a dart for covering and protecting a constant velocity joint used in a drive shaft of an automobile such as a front-wheel drive vehicle or a four-wheel drive vehicle. It concerns a method and device for measuring.

BACKGROUND OF THE INVENTION In general, darts of this kind are made of rubber or the like in a bellows shape, and grease is sealed inside to prevent seizure of the constant velocity joint. In addition, these boots are required to have deformation resistance and heat resistance, especially when rotating.

Therefore, in order to evaluate these properties, the boot is rotated in a constant temperature bath and the deformation 1\j' and the deformation position are measured. That is, rotation of the boot 11. ＋lQ: If the dart has any parts that are mechanically weak compared to other parts, such as rough spots, flow during molding, scratches, etc.
Deflection occurs at weak points due to the centrifugal force of the internal grease.

If this deflection is large, there is a risk that it will interfere with and destroy the surrounding jl and 11 items. For this purpose, we measure the amount of deformation and zero/deformation position of this seesaw to evaluate the defective parts of the product, and use this information to improve the product.

Therefore, conventional methods for determining the deformed state of the boots include the method of photographing the shape of the boots using a high-density camera, the method of photographing the shape of the boots using a high-density camera, and the method of pressing one's body against the outer surface of the boots using viscoplastic materials such as clay. There is a method to check the deformed state of the boots using a laser beam, a method to measure the deformed state of the boots using a Nutrobo, and a method to measure the deformed state of the boots by shining a light on the boots with a 1-1 view of the previous month. be.

However, these conventional measurement methods have the following defects. That is, the fJ method used in high-speed cameras requires a long film processing time and has the disadvantage that measurement data 2 cannot be obtained on the spot. Furthermore, the method using a viscoplastic body has the disadvantage that it is not only impossible to measure at various rotational speeds, but also that the position of deformation cannot be measured. Furthermore, the method using a laser light source has the disadvantage that it is not possible to measure the deformation position, and the deformation direction is not determined, resulting in a plurality of measurement points, which complicates the mechanism.

In addition, in the method of using a strobe, the boots G while the iron is rotating are irradiated with light and the boots are apparently stationary for 1-2 seconds. The deformation state of the boot at the deformation position at each rotational speed was measured visually using a case make (a hide gauge with a sight), and the maximum difference from the dart shape at the standard speed was determined. The amount of deformation is estimated.

Furthermore, in order to measure the deformation position, markings are made at equal intervals on the crest of the boot to identify numbers and symbols, and these numbers and symbols are visually identified and determined at the time of each measurement.

Therefore, in this conventional measurement method,
Robo's JI) J total 21i! It is difficult to adjust to the position where the deformation is maximum) It takes time on the 1st floor, and detailed markings are required to measure the deformation position, which is very troublesome. Moreover, it is necessary to constantly monitor the boots to prevent them from bursting and the grease scattering, and the drawback is that the strobe light is extremely tiring. was there.

Purpose of the Invention The present invention eliminates the deficiencies in the conventional measurement method as described above, and eliminates the troublesome work of synchronizing strobes and marking rotary deformable objects such as boots for determining the deformation position. The deformation amount and deformation position of the rotary deformable body can be continuously and automatically measured and shifted without the need, and the rotation of the deformable body can be stopped when the deformation exceeds a predetermined value. In the case where the rotating deformable body is a boot, it is possible to prevent the scattering of grease due to the rupture of the boot; Is there a deformation state meter for rotary deformable objects? lf! 1 method and apparatus.

Structure of the Invention In order to achieve the above-mentioned objective 1, the present invention rotates a sample at a set speed, operates a strobe and a camera, and detects each position Q on the entire circumference of the sample at each predetermined rotation angle. This light is applied and an image of the sample is captured to measure the amount of deformation and the position of deformation as the sample rotates.

EXAMPLE Below, details of a measuring device embodying the present invention will be explained with reference to the drawings.
is provided, a window 2 is formed in the front thereof, and
Inside is a pair of left and right constant velocity joint boots sample T1.
．． T2 can be rotated and accommodated in [f].

A plurality of strobes 3 are provided at the rear of the thermostatic chamber 1 in correspondence with the samples TI and T2, and are designed to illuminate the samples Tl and T2 through a milky-white translucent plate 4. This semi-transparent plate 4 forms the background of the samples TI and T2, and the sample T
This is to highlight the silhouettes of I and T2.

A fan heater 5 is provided on one side of the 11i hot tub 1,
Inside the constant temperature chamber 1, hot air is sent into it. or,
A temperature sensor 6 is provided in the thermostatic chamber 1, and 1:jj l
&i' in tank 1? ! It should be able to detect 1+j degrees. A temperature regulator 7 is connected to the temperature sensor 6, and a fan heat generator 5 is operated based on the temperature detected by the temperature sensor 6, so that the constant/l? The inside of the L tank 1 is maintained at an appropriate set temperature.

A motor 8 is provided on the concave side of the constant temperature bath 1, and serves to rotate the samples TI and T2 housed in the constant temperature bath. A speed detector 9 is provided on the side 7B1 of the motor 8, and is configured to detect the rotational speed of the sample T1'r2 by the motor 8.A speed controller 10 is connected to the speed detector 9. speed detector 9
The rotational speed of the motor 8 is controlled based on the detected speed. In addition, in this embodiment, as shown in FIG. It is controlled by an operation program setting device 11 via a processing device 12 and a speed controller 10.

The side ζ of the motor 8 is a position detector 1 such as an encoder.
3 is provided, and the sample TI is driven by a motor 8Q.

Check the rotation angle position of T2.

A timing detector 14 is connected to the position detector 13,
The rotational speeds of the samples TI and T2 are synchronized to generate an actuation signal at every predetermined rotational angle. and,
In this example, every 4 degrees of rotation angle of samples TI and T2,
A total of 90 actuation signals are to be generated.

L-C, the strobe 3 is intermittently activated via the processing device if12 based on the activation signal G from the timing detector 14, and illuminates each position of the entire circumference of the samples TI and T2 with light μJ. It's going well.

The camera 16 is located outside the window 2 of the thermostatic chamber 1.
2, and is intermittently activated by the activation signal Q from the timing detector 14 at the position corresponding to one of the samples T1 and T2. , Sample T 1. every time the strobe 15 emits light.
Begins to capture images of T2 (Iro).

A video system 17 is connected to the camera 16, and based on the images captured by the camera 16, the sample TI,
The measurement process is performed by calculating the amount of deformation of the rotation 114 of T2. For example, FIG. 2(a).

For a total of 411 samples of test 4' and ITl shown in (b), when the sample T1 deforms from a solid line shape to a chain line shape as it rotates, the 11.11 m l and 21.
．． 11 m 2 deformation j-Qj', x 1 , x
Measure 2 by 4, and let's find 10 by taking the deformed position as the rotation angle from the reference point P (it's 2).

In this embodiment, the deformation information from the video stem 17, the position information from the timing detector 14, the temperature information from the temperature controller 7, etc. are manually input to the processing device 1j11, and these data is printer 18
It is possible to immediately output the image on a CRT display 19 or a CRT display 19. My father's video system 17G is connected to a monitor television 20 so that he can view the images taken by the camera 16 on the spot. Further, in this embodiment, when a signal 1n of a value larger than a predetermined amount of deformation is manually inputted from the video system 17 to the processing device 12, the processing device 12 sends a message via the speed controller 10 to stop the mole 8ζ. A signal is output and the motor 8 is stopped.

Therefore, this measuring device can be easily detected by simply setting the samples TI and T2 of the constant-velocity joint boots in the temperature chamber 1, and the samples TI and T2 rotate at the predetermined set speed shown in Figure 3. strobe 15 in synchronization with the rotation speed.
The camera 16 is operated intermittently, and light is irradiated at each position Q around the entire circumference of the samples TI and T2 at every predetermined rotation angle, and images of the samples TI and T2 are taken each time. Sample T1 from video system 17G,
The amounts of deformation x1 and x2 of winter mountains m1 and m2 at T2 are automatically measured and their deformed positions are determined.

In addition, especially when the sample 'rj, T2 is deformed by a predetermined value or more,
Since the rotation of the mold 8 is stopped 1-, the sample TI.

61 measurements can be carried out safely without the risk of rupturing the 1 and 2 parts and scattering the internal grease.

Note that the present invention is not limited to the embodiment described above, and for example, a position setting device 21 may be provided connected to the timing detector 14 as shown by the chain line in FIG. The output timing of the actuation signal in the timing detector 14 can be arbitrarily changed using the device 21, or another strobe 15 can be installed in place of the strobe 30 in parallel with the camera 16 (in this case, the position Q of the strobe 3 can be changed). (In this case, it is preferable to provide R lighting lamps), or use another object as a sample as a rotationally deformable body. It is Noh.

Effects of the Invention 1 - As described in detail, the present invention enables rotational deformation without requiring extensive work such as synchronizing strobe lights or marking a rotary deformable object such as a boot for determining the deformation position. The amount of deformation and deformation position of the body can be continuously and automatically measured, and the rotation of the rotary deformable body is stopped when the deformation exceeds a predetermined value (1-G). In addition, it has the excellent effect of preventing grease from scattering when the boot bursts, and also improving work efficiency by preventing eye fatigue due to direct viewing of strobe light. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a measuring device embodying this invention.
2(a) and 2(b) are a front view and a side view for explaining the deformation of the sample, and FIG. 3 is a graph showing the setting state of the rotational speed of the motor. 1 is a constant temperature chamber, 8 is a motor, 14 is a timing detector, 1
5 is a strobe, 16 is a camera, and 17 is a video system. 4.r Applicant Toyoda Gosei Co., Ltd. Agent Patent Attorney On 11J Hironobu 2nd FIJ (a) (b) Time-
00/191'' Commissioner of the Patent Office Kazuto Wakasugi 2 Title of the invention Deformation state of rotationally deformable body ■1 Force measurement method and device 3, Supplement 11-
Old M1 I'I What relationship: Mo'hai 1 Applicant's address 1, Aichisu 1-cho, Nishitani Hizuki-gun, Kasugakan, Oaza Ochiai, Atsuhata 1
Address Name μ:+U+Composition J Co., Ltd. (Name) Representative and Masahiro Nemoto 4, Agent 11 〒500 Gikushi City Pro: Tsumemachi 2 rEl-,<
0582>65--1810 (Representative) 6, Supplement 1]: Simple drawing of the subject specification cause '1 TJ2 Bright column 7, Contents of amendment

Claims (1)

[Claims] l Rotate the sample at a set speed, operate the strobe and camera, shine light on each position around the sample at each predetermined rotation angle, capture an image of the sample, and rotate sample H. 9.1 Measure the amount of deformation and deformation position caused by G.
``Method for measuring the deformation state of a rotating deformed body. 2. A constant temperature bath containing sample Ni'l, and its 'l''1/! , a motor that simultaneously rotates the sample contained in the +ij tank at a set speed, and a predetermined 1! ! A timing detection means that generates an actuation signal at every rotation angle, and a striker that is intermittently driven negatively based on the actuation signal from the timing detection means and shines light at each position on the entire circumference of the sample. [Cobo] +irr A camera that is intermittently activated based on the activation signal from the timing detection means and captures an image of the sample every time the strobe flashes, and a camera that rotates the sample based on the image captured by the camera. 1. A deformation state measuring device for a rotary deformable body, comprising means for measuring and processing the amount of deformation and the position of deformation accompanying the deformation.