JPS6017302A - Measuring machine of surface distortion - Google Patents

Abstract

PURPOSE:To obtain a portable surface distortion measuring machine by fitting X-axis and Y-axis magnet scales, a magnetic head for reading out the division of the scales and a detector to the body of the measuring machine. CONSTITUTION:The X-axis magnet scale 14 is fitted to the body 2 of the surface distortion measuring machine 1 and a magnetic head 20 of a moving body 17 fitted to a slide shaft 15 through a bearing 18 so as to be slid reads out the digital division of the scale 14 and outputs the read out result to a signal processor. The Y-axis magnet scale 22 is fitted to a detecting part 21' and a detector 23 in the detecting part 21' has a magnetic head reading out the division of the scale 22 and fits a steel ball 24 rotatably to its leading end part so as to follow the shape change of the surface to be measured. A setting reference magnet 12 is adsorbed to the outer panel part of a car body, the moving body 17 is moved at a prescribed pitch and data are recorded and displayed on a CRT display and a numeral display part.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a surface strain measuring device for measuring surface strain of a steel sheet product formed by a press or the like.

(Prior Art) Conventional surface strain measuring instruments were installed and could not be carried, so a separate measurement site was set up and the device was installed and fixed at this measurement site. Therefore, parts produced in each process had to be taken to the measurement site one by one, which caused problems in terms of work efficiency.

(Object of the Invention) In view of the above problems, an object of the present invention is to provide a portable surface strain measuring device.

(Structure of the Invention) The structure of the present invention is such that a digital scale serving as a scale in the width direction of the surface to be measured is provided on the main body of the measuring machine having an installation reference magnet that is attracted to the surface to be measured and serves as a reference for installation on the surface to be measured. is provided with an X-axis magnetic scale on which is recorded, and
A movable body having a magnetic head for reading the scale of the magnet scale is slidably provided, and a Y-axis magnetic scale is recorded on the movable body, and a digital scale serving as a scale in a direction perpendicular to the surface to be measured is recorded. a probe element extending in a direction perpendicular to the surface to be measured and whose tip end is biased in a direction to contact the surface to be measured; This is a surface strain measuring device characterized by being equipped with a magnetic head for reading the graduations of a scale.

(Example) Examples according to the present invention will be described below with reference to the drawings. Similarly, here, the width direction of the surface to be measured is defined as the X-axis direction, and the perpendicular direction to the surface is defined as the Y-axis direction.

FIG. 1 is a partially sectional plan view showing the structure of a surface strain measuring instrument 1 according to the present invention, and FIG. 2 is a partially sectional front view thereof. In these figures, 2 is the main body. The main body 2 has at both ends thereof, as shown in FIG. 3, a bracket member 4 fixed by a screw 3.3, and this bracket member 4 has a holding part 5. An adjustment member 6 is threaded through the holding portion 5, and an adjustment dial 7 is fixed to one end of the adjustment member 6, and a magnet 8 is supported at the other end. The magnet body 8 includes a screw pin 9 and a screw tube 1.
0, a holding frame 11, and a magnet 12 for installation reference.

The threaded portion of the screw pin 9 is screwed into and fixed to the adjustment member 61, and the spherical head is rotatably fitted into the screw cylinder 10. The threaded cylinder 10 has a threaded portion 10a on its outer periphery. The holding frame 11 has a cylindrical shape and has a bottom wall 11a at an axially intermediate portion thereof.
An installation reference magnet 12 is fitted and held at one end with the boundary between the two ends, and a threaded portion 11 is provided on the inner circumferential surface of the other end.

The threaded portion 10a of the threaded tube 10 is screwed into the threaded portion 11b, and the installation reference magnet 12 is removably attached. This installation standard magnet 1
2 is attached to the surface to be measured and serves as a dimensional reference in the X-axis direction and Y-axis direction. Adjustment in the X-axis direction is performed by moving the main body 2, and adjustment in the Y-axis direction is performed using a dial. This is done by turning 7.

In addition to the installation reference magnet 12, the main body 2 has four installation magnets 13 located inwardly in the X-axis direction.
When installing the surface strain measuring device 1 on the surface to be measured, the installation reference magnets 4, 4 are always used, and two of the four installation magnets 13 are used depending on the measurement range. It looks like this. Thereby, the surface strain measuring device 1 is set on the surface to be measured using four magnets. The installation magnet 13 is used as an installation standard magnet (magnetic screw) to ensure close contact with the surface to be measured.
It is possible to adjust the height over 12.12 degrees.

The main body 2 is provided with an X-axis magnetic scale 14 serving as a scale in the X-axis direction. A digital scale is recorded on this X-axis magnetic scale 14, and this digital scale is a magnetic stripe linearly engraved with a width of 1, and the measurement range is θ to ±300 trrm.
It is said that

The main body 2 also has a slide shaft 15. The slide shaft 15 extends parallel to the main body 2, with both ends supported by support portions 16 formed on the bracket member 4.

17 is a movable body, and this movable body 17 is a bearing 1.
It is slidably provided on the slide shaft 15 via 8, and 19 is its base body. This movable body 17 is
As shown in FIG. 4, it has a magnetic head 20. This magnetic head 20 reads the digital scale of the X-axis magnetic scale 14 and outputs the signal to a signal processing device to be described later, and 21 is a lead wire thereof.

The movable body 17 is provided with two detection units, and the detection unit 2
1' is provided with a Y-axis magnetic scale 22 serving as a scale in the Y-axis direction. Similar to the X-axis magnetic scale 14, this Y-axis magnetic scale 22 also has digital scales linearly recorded thereon, and the interval between the magnetic stripes is 0.01 m to 0.001 m. Further, the detection section 21' is provided with a probe 23. This probe 23 is set to extend perpendicular to the surface to be measured, and has a magnetic head for reading the scale of the Y-axis magnetic scale 22, and has a steel ball at its tip. 24 are available for transfer.

This steel ball 24 is brought into contact with the surface to be measured during measurement, and is biased in the direction of the contact, so as to follow changes in the shape of the surface to be measured as much as possible.

Further, a link rod 26 that rotates around a shaft 25 is pivotally attached to the lower end of the base body 19 of the movable body 17, and a retaining groove 27 is formed in the free end of this link rod 26. .

The bearing 18 has an engagement claw 28 in an engagement groove 27.
It is formed so that it can be engaged with.

Further, a screw 30 having a dial 29 is screwed into the front surface of the base body 19, and the tip of the screw portion 30 is in contact with the free end of the link rod 26.

In this configuration, by rotating the dial 29 to loosen the engagement between the engagement groove 27 of the link rod 26 and the engagement claw 28 of the bearing 18, the movable body 17 can be rotated about the slide shaft 15. It is now possible to do so. As a result, when the probe 23 cannot be set perpendicular to the surface due to the installation location of the surface strain measuring device with respect to the surface to be measured, adjustment can be made by rotating the movable body 17. .

In addition, the probe 23 and the Y-axis magnetic scale 22 are
Adjustment can be made by operating a dial 31 provided below the dial 29, thereby expanding the degree of undulation of the surface to be measured.

The movable body 17 includes a +/- changeover switch for switching up and down the count, a set switch for setting the reference value (preset value) on the counter in advance, and a set switch for setting the counter in advance in the X-axis direction. Microwave to 1mm
, 10mm, 50. An X-axis switch and the like are provided for switching to three stages.

The detection unit 21' also includes a knob for setting the Y-axis counter to zero, a +/- switch for switching the direction of the counter up/down,
The range in the Y-axis direction is 10 μm, 100 μm 51 m + 3
A range switch etc. for switching between stages is provided.

Furthermore, the main body 2 and the base body 19 are arranged in the X-axis direction and the Y-axis direction.
Slide scale 32.33 that serves as a guide for axial dimensions
are provided for each. In particular, a cursor 34 for indicating a slide scale 32 in the X-axis direction is provided on the movable body 17, and is rotated so that the current position can be confirmed. Furthermore, at both ends of the main body 2,
Block 35.35 is provided, and this block 3
5.35, it is possible to scribe or mark the installation position of the surface strain measuring device 1.

FIG. 5 is a block diagram of the signal processing device, and this diagram
Here, 36 is a control section. This control unit 36 is a compact one with a built-in microprocessor,
Moreover, it has the functions shown in the flowchart of FIG. The control unit 36 also includes an X-axis counter/an
37, a Y-axis counter 38, and a seventh
A CRT display 39 for displaying graphics as shown in the figure;
Numerical display section 40.41 and counter 37.38 for displaying measured dimension values in the X-axis and Y-axis directions as characters
A polarity switch for changing the polarity of the data, a setting switch for setting the value at the measurement reference point to an arbitrary value, a reset switch for returning all functions to their initial state, and a block-start switch for outputting data to the plotter described later. , and a switch group 42 including a range switch for switching the graphic output scale to three levels. A plotter 42 is connected to the control unit 36, and the block 42 is configured to draw measurement data on paper.

Additionally, a measurement start switch 43 provided independently outside is connected to the control unit 36. When the measurement start switch 43 is pressed once, the measurement data is ready to be read, and when pressed another time, the measurement data is ready to be read. It also serves as an exit switch.

Next, the method of use and effect will be explained. In addition, here, the seventh
A case will be described in which the surface strain of the outer panel portion of the door portion forming a part of the body W of the automobile shown in FIG. ζ is measured.

First, choose what kind of surface strain you want to measure. For example, if it is a pressed product, this is done by operating the corresponding switch of the control unit 36.

In other words, since we are measuring the outer panel part, we will select the body shell part. Next, the measurement range is visually confirmed and it is determined which of the four installation magnets 13 to use, that is, the fulcrum is selected. Then, with the installation reference magnet 12.12 and these installation magnets 13.13 closely adsorbed to the outer panel portion of the automobile body W flowing through the production line, the detection unit 23 is adjusted to detect the Y-axis. Perform zero adjustment. If necessary, mark or scribe.

After setting the surface strain measuring device 1 to the outer panel portion, the measurement start switch 43 is pressed to move the movable body 17 in the X-axis direction by a predetermined distance, and data is input to the control section 36. At this time, the control unit 36 records data for each pitch, draws this data graphically on the CRT display 39, and also displays the data on the numerical display unit 40.41.
The displacement in the X and X-axis directions is displayed numerically. Then, when the measurement operation for the predetermined range is completed, press the measurement disclosure switch 43 Moller times to turn on the plotter start switch.
The control section 36 outputs the data to the plotter 42. Then, the plotter 42 plots data for each pitch. After plotting all the data, the plotter 42 approximates all the plotted points with a smooth curve. An example of this would be as shown in FIG. Here, when the difference between the plotted point P and the approximate curve exceeds a predetermined value, this is determined to be distortion, and the product is rejected. In FIG. 8, distortion is indicated by reference numerals.

Next, the position of the measuring device 1 is reset and the same operation is performed to measure the 3-time curved surface.

According to the above embodiment, the following effects are achieved.

■ Since all data based on the signals from the measuring device 1 is automatically processed, the amount of manual work required is greatly reduced, resulting in more accurate measurement results and a significant reduction in the time required for measurement. can.

■ If you mark or mark the installation position of the measuring device 1 every time you take a measurement, you can use it in case, for example, if you are unsure of the data or if you have taken a measurement without operating a part that should be operated. Since data of the same portion can be obtained again, the reproducibility of the set position of the measuring device 1 is improved, and measurement accuracy is improved.

Similarly, in the above embodiment, the movable body 17 was operated manually, but it may also be moved using a drive source (such as a motor). Further, although the distortion was judged visually, a comparator or the like may be used to judge pass or fail.

(Effects of the Invention) As explained above, according to the present invention, since it is small, it can be carried into the production line, so there is no need to carry the product to the measurement site for each measurement. This has the effect that the fixed time on the originating side can be significantly shortened. This makes it possible to measure a larger number of objects than in the past, increasing the amount of data in the notification process, which greatly contributes to process improvement.

Furthermore, since a magnetic scale is used as the scale, the accuracy is better than that using a botetometer.

[Brief explanation of drawings]

Fig. 1 is a partially sectional plan view of the surface strain measuring device of the present invention, Fig. 2 is a partially sectional front view thereof, Fig. 3 is a partially sectional side view thereof, and Fig. 4 is Fig. 1 and Fig. 2. A cross-sectional side view taken along the line IV-IV shown in
Fig. 5 is a block circuit diagram of the signal processing device, Fig. 6 is a flowchart showing the functions of the control section, Fig. 7 is a perspective view showing the measuring device of the present invention set in the body of an automobile, and Fig. 8 is It is a graph showing an example of measurement results. 1... Surface strain measuring device 2... Main body 12... Installation reference magnet 14... X-axis magnet scale 17... Movable body 20... Magnetic head 21'... Detection section 22... ...Y-axis magnetic scale 23... Tester patent applicant Toyota Motor Corporation Sai3 Figure 14 Spear 4 Figure 21'? 1 1 Spear 5 Figure

Claims (1)

[Claims] (1) An X-axis on which a digital scale that serves as a scale in the width direction of the surface to be measured is recorded on the main body of the measuring device, which has an installation reference magnet that is attracted to the surface to be measured and serves as a reference for installation on the surface to be measured. A magnetic scale is provided, and a movable body having a magnetic head for reading the scale of the X-axis magnetic scale is slidably provided, and the movable body has a digital scale serving as a scale in a direction perpendicular to the surface to be measured. The recorded Y-axis magnetic scale, a probe that extends perpendicular to the surface to be measured and is biased in a direction in which its tip comes into contact with the surface to be measured, and the movement of the probe. A surface strain measuring device characterized in that it is provided with a magnetic head for reading the graduations of the Y-axis magnetic scale accordingly.