JPH03180739A - Hardness measuring instrument - Google Patents

Abstract

PURPOSE:To take an accurate measurement without destruction by detecting the position of a measuring element which can move horizontally and vertically while moving the element in contact with the surface shape of a body to be measured on a sample base, and detecting the deformation of the body due to the loading of the measuring element. CONSTITUTION:The body 13 is mounted on the sample base 1 and an operation member 7 operates up-down and horizontal moving members 4 and 5 of a moving mechanism 3 to bring the measuring element 2 into contact with the surface of the body 13 to be measured, and while the body is moved, its position is sent to a control member 8 through displacement sensors 14 and 15 at the rear end of an arm 11; and the signal is processed by a personal computer 9 and the sectional shape is displayed on a CRT screen 10. At this time, the measuring element 2 is stopped at a desired position and a load placing mechanism 6 places a specific load; and the quantity of depression of the body 13 is detected a specific time later and converted by the personal computer 9 into hardness, which is displayed on the screen 10. Consequently, the accurate hardness can be measured in the nondestructive state without being limiting to the shape of the body 13 nor its measurement place.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a hardness measuring device, and in particular to a hardness measuring device that is preferably used for measuring the hardness of rubber, is easy to measure, and has excellent measurement accuracy. It is.

[Prior art and its problems]

Generally, to measure the hardness of rubber, a spring type rubber hardness meter, a pencil type rubber hardness meter, a Wallace rubber hardness meter, etc. are used.

The spring-type rubber hardness meter and the pencil-type rubber hardness meter measure the rubber hardness of the object by pressing the indenter of the hardness meter against the object. , the thickness of the object to be measured is 1
, 5 to 2.5 cm, and is measured by pressing the fixed object on the hardness meter with the foot of the hardness tester.

However, with spring-type rubber hardness meters and pencil-type rubber hardness meters, the measurer himself or herself presses the indenter onto the object to be measured. cannot be specified.

Further, since it is not easy to press the indenter against the object to be measured at right angles, accurate measurement values cannot be obtained.

Furthermore, there is a problem in that it is not possible to measure the hardness of a part that is invisible to the user.

Furthermore, in the case of a spring-type rubber hardness tester, the load on the indenter is as high as 55 kgf to 855 kgf, so there is a problem in that it is difficult to measure minute parts.

On the other hand, the thickness of the Wallace rubber hardness tester is 1.5.
Since the object to be measured is a*~2.5-, it is impossible to measure a thicker object in a non-destructive state.

Furthermore, since the measurement is carried out by holding down the object to be measured with the foot, there is a problem in that the measuring point cannot be accurately specified.

This invention solves the problems of the conventional methods as described above, and is suitable for measuring complex shapes, minute parts, parts out of the reach of the measurer, parts invisible to the measurer, etc. In addition to being able to measure objects in a non-destructive state without limiting the thickness of the object to be measured, it is also possible to accurately identify the measurement location.
The present invention provides a hardness measuring device that can obtain accurate measured values.

[Means for solving problems]

In order to achieve the above object, the present invention provides a sample stage on which an object to be measured can be placed, a measuring head disposed so as to be able to move toward and away from the sample stage, and a measuring head that can be moved horizontally and comprising a moving mechanism that moves the probe in the vertical direction, a load adding mechanism that applies a load to the probe, a detection member that detects the position of the probe, and a control member that processes a detection signal from the detection member; The object to be measured is placed on the sample stage, and the measuring element is brought into contact with the surface of the object to be measured and moved along the surface shape of the object by the operation of the moving mechanism, and measurement is performed at that time. The position of the child is detected by the detection member, the detection signal is processed by the control member, the cross-sectional shape of the object to be measured is output to the control member, and the load is applied at a desired position of the object to be measured. The mechanism is actuated to apply a load to the probe, which is initially in contact with the surface of the object to be measured, to deform the object to be measured, and the amount of displacement of the probe at that time is detected by the detection member. , a means is adopted for processing this detection signal by the control member and outputting the hardness at a desired position of the object to be measured to the control member.

[Effect]

By adopting the above-mentioned means, the present invention can measure the surface shape of the object to be measured by bringing the probe into contact with the surface of the object to be measured and moving it along the surface shape of the object to be measured by the operation of the moving mechanism. By detecting the position of the contact point with the detection member and processing the detection signal with the control member, the surface shape of the object to be measured is output to the control member.
The hardness at a desired position of the object to be measured can be determined by applying a load to the probe through the operation of the load adding mechanism to deform the object, and detecting the amount of displacement of the probe at that time using a detection member, and obtaining a detection signal. By processing this by the control member, the hardness at a desired position of the object to be measured is output to the control member.

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

1 to 4 show a hardness measuring device according to the present invention, in which FIG. 1 is a schematic explanatory view showing the whole, FIG. 2 is a partially enlarged explanatory view of what is shown in FIG. 1, and FIG. FIG. 4 is an explanatory diagram showing the relationship between the object to be measured and the probe.

That is, the hardness measuring apparatus shown in FIGS. 1 to 4 can measure the object to be measured 13! ! A sample stage 1 that can be mounted, a measuring element 2 disposed so as to be able to move toward and away from the sample stage 1, a moving mechanism 3 that moves this measuring element 2 horizontally and vertically, and the measuring element 2. a load applying mechanism 6 that applies a load to the moving mechanism 3 and the load applying mechanism 6; an operating member 7 that operates the moving mechanism 3 and the load applying mechanism 6; and a detecting member 14.1 that detects the position of the probe 2.
5, and a control member 8 that processes signals from the detection members 14 and 15 and outputs information corresponding to the signals.

The measuring element 2 is connected to the load applying mechanism 6 via the arm 11.
The rear end of this arm 11 has a second
As shown in the figure, a displacement sensor 14.1 is a detection member that detects the amount of vertical and horizontal displacement of arm 11.
5 are provided respectively, and these displacement sensors 14
．． 15 makes it possible to detect the position of the probe 2 provided at the tip of the arm 11.

The load applying mechanism 6 is connected to the motor 1 as shown in FIG.
By operating 7, the weight 18 is
A load is applied to the arm 11, and thereby a load is applied to the probe 2 at the tip of the arm 11.

The moving mechanism 3 supports the load applying mechanism 6 and is isolated from a horizontal moving member 5 that is movable in the horizontal direction and a vertical moving member 4 that moves the horizontal moving member 5 in the vertical direction, Therefore, the load applying mechanism 6 can be moved horizontally and vertically by the moving mechanism 3, and accordingly, the probe 2 connected to the load applying mechanism 6 can also be moved via the arm 11. It is movable horizontally and vertically.

The control member 8 controls the moving mechanism 3 and the load applying mechanism 6, and also includes a personal computer 9 that processes signals from a detection member (displacement sensor) 14 and 15 that detects the position of the measuring stylus 2. It consists of a CRT screen 1° that displays information according to the signal.

The operating member 7 operates the moving mechanism 3 and the load applying mechanism 6 to operate the probe 2, and by operating the operating member 7, the object to be measured placed on the sample stage l is moved. The measuring element 2 is moved along the surface shape of the measuring element 13, or a load is applied to the measuring element 2 to apply pressure to the object to be measured 13.

The moving mechanism 3 and the load applying mechanism 6 are arranged on the column 12, and therefore the moving mechanism 3 and the load applying mechanism 6 move vertically and horizontally on the column 12. It is.

Next, the effects of the above will be explained.

First, place the object to be measured 13 on the sample stage 1! ! Then, by operating the operating member 7, the vertically moving member 4 and the horizontally moving member 5 of the moving mechanism 3 on the column 12 are actuated to bring the probe 2 into contact with the surface of the object to be measured 13.

Next, the vertical moving member 4 and the horizontal moving member 5 of the moving mechanism 3 operate to move the measuring stylus 2 to the object to be measured 13.
displacement sensor 14, which is a detection member provided at the rear end of the arm 11 supporting the measuring stylus 2, detects the position of the measuring stylus 2 at this time.
15 to the control member 8, the signal is processed by the personal computer 9 of the control member 8, and the signal is sent to the CRT of the control member 8.
It is displayed on the screen 10.

As a result, the locus of movement of the tracing stylus 2, that is, the cross-sectional shape of the object to be measured 13 is enlarged and displayed on the CR7 screen 10.

Therefore, the measurer can check the shape of the object to be measured 13, the position of the probe 2 on the object to be measured 13, the contact angle, etc., simply by looking at the CRT screen 10 of the control member 8.

On the other hand, when measuring the hardness at a desired position of the object to be measured 13, the measuring stylus 2 reaches the desired position of the object to be measured 13 by the operation of the vertical moving member 4 and the horizontal moving member 5 of the moving mechanism 3. At this time, by operating the operating member 7, the measuring element 2
By stopping the probe at a desired position and activating the load applying mechanism 6 at that position, a predetermined load is applied to the probe 2 and held in that state for a predetermined period of time. (See Figures 3 and 4.) After a predetermined period of time has elapsed, the amount of depression (displacement) h of the object to be measured 13 is measured by the arm 1 that supports the probe 2.
Detected by a displacement sensor 14.15, which is a detection member provided at the rear end of the
is sent to the computer 9 of the control member 8 and the amount of depression (
CR7 screen 1 of control member 8 by converting displacement amount h into hardness
Display on top of 0.

In this case, the calculation formula for converting the amount of depression (displacement amount) h of the object to be measured 13 into hardness is input in advance into the program of the computer 9 of the control member 8, and the calculation formula is inputted in advance into the program of the computer 9 of the control member 8, and the calculation formula is inputted into the program of the computer 9 of the control member 8, and When the signal is input, the depression N
Create a program to convert (displacement amount) h into hardness.

In this way, the hardness at a desired position of the object to be measured 13 can be easily measured.

Therefore, it is possible to measure the hardness of objects with complex shapes, minute parts, parts that cannot be accessed with hands, parts that are invisible to the naked eye, etc., in a non-destructive state.

Furthermore, since the cross-sectional shape of the object to be measured 13 and the position of the probe 2 can be measured while being enlarged on the CR7 screen 10 of the control member 8, the measurement point can be accurately specified, and the surface of the object to be measured 13 can be measured. Therefore, the hardness at a desired position of the object to be measured 13 can be accurately measured.

Furthermore, since the measurement location can be accurately specified,
It is also possible to create a hardness distribution for the entire 3.

The hardness measured by this hardness measuring device is
The hardness measured by this hardness measuring device is ○○. Therefore, in order to convert to -a hardness display, the conversion formula must be set in advance by the control member 8.
It is necessary to program it in the personal computer 9.

[Effects of the Invention] With the above configuration, the present invention is not limited to the shape of the object to be measured or the measurement location, and moreover,
Hardness can be measured accurately in a non-destructive state, and since the cross-sectional shape of the object to be measured can be enlarged and measured, it is possible to accurately identify the measurement location and to This allows the measuring element to be applied at right angles, and therefore has excellent effects such as being able to accurately specify the measurement location and creating the hardness distribution of the entire object to be measured.

[Brief explanation of drawings]

1 to 4 show a hardness measuring device according to the present invention,
Fig. 1 is a schematic explanatory diagram showing the whole, Fig. 2 is a partially enlarged explanatory diagram of what is shown in Fig. 1, and Figs. 3 and 4 are the relationship between the object to be measured and the probe as shown in Fig. 1. FIG. 1... Sample stage 2... Measuring head 3... Moving mechanism 4... Vertical moving member 5... Horizontal moving member 6... ...Load adding mechanism 7 ...Operation member 8 ...Control member 9 ...PC 10 ...CRT screen 11 ...Arm 12... Column 13... Object to be measured 14.15... Detection member (displacement sensor) 16.
...Fully point 17 ... Motor 18 ... Weight h ... Indentation amount (displacement amount) Patent application Artificial Nuoka Co., Ltd. Figure 3 Figure 4 Flat bottom 2 December 19th

Claims (1)

[Claims] (1) A sample stage (1) on which an object to be measured (13) can be placed;
A measuring element (2) arranged so as to be able to move toward and away from the sample stage (1), a moving mechanism (3) for moving this measuring element (2) horizontally and vertically, and a measuring element (2) that moves the measuring element (2) horizontally and vertically; 2), a load adding mechanism (6) that applies a load to the probe, detection members (14), (15) that detect the position of the probe (2), and detection from the detection members (14), (15). A control member (8) for processing a signal, an object to be measured (13) is placed on the sample stage (1), and the measuring element (2) is moved to the object to be measured by the operation of the moving mechanism (3). The probe (2) is brought into contact with the surface of the object (13) and moved along the surface shape of the object (13), and the position of the probe (2) at that time is detected by the detection members (14) and (15). The control member (8) processes the detection signal to output the cross-sectional shape of the object (13) to the control member (8).
The load applying mechanism (6) is operated at the desired position in step 3) to apply a load to the probe (2) which was initially in contact with the surface of the object to be measured (13), thereby applying a load to the object to be measured (13). (1
3), the amount of displacement of the probe (2) at that time is detected by the detection members (14) and (15), and this detection signal is processed by the control member (8) to detect the object to be measured. (13)
A hardness measuring device characterized in that the hardness at a desired position of the hardness is outputted to a control member (8).