JP2002202103A - Oblique face angle measuring method of measuring object and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the measuring method of an oblique face angle for simply measuring and displaying the oblique face angle of a measuring object by a contact method. SOLUTION: After the set angle of the measuring object is calculated and the logic value height of a block is found, the length of a block gage interposed between the upper face of a surface table and a sign bar is calculated to find the oblique angle of the sign bar, a difference between the arbitrary two point heights of the oblique face of the measuring object is measured by a height measuring linear gage, an angle on the sign bar of the measuring object is found by the difference in height between the two points and a distance between the two points, and the oblique face angle of the measuring object is found by the addition and subtraction calculation of the angle and the oblique angle of the sign bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope angle measuring method and apparatus for measuring the angle of a slope of an object to be measured such as a mold part or a tool.

[0002]

2. Description of the Related Art Conventionally, there is a tool microscope as a tool for measuring such a slope angle. This tool microscope observes a table on which a workpiece movable in two directions perpendicular to the front, rear, left and right, a measurement system for measuring an amount of movement of the table, and the workpiece mounted on the table. And a microscope for performing positioning by moving the table while observing the object to be measured with the microscope to measure a slope angle of a predetermined portion of the object to be measured.

Another conventional example is disclosed in Japanese Unexamined Patent Publication No.
There is a slope dimension measuring method as shown in FIG. In this measuring method, a measuring object 3 is placed on a measuring surface of a sine bar 2 installed on a pedestal 1 and tilted around the axis of one roller 4 while the other roller 5 is tilted.
A gauge block 6 corresponding to the slope angle of the measurement object 3 is disposed between the gauge block 6 and the pedestal 1.

[0004] A specific section when the slope angle of the measurement object 3 is adjusted to a horizontal state, that is, the measurement object 3
The theoretical value of the distance H from the slope 3a to the bottom surface of the pedestal 1 is calculated, and the distance of the specific section is actually measured by a contact-type measuring instrument, and the actual measured value is compared with the theoretical value by
This is for determining whether or not the measured object 3 has a desired slope size.

[0005]

However, the measurement of the slope dimension by the tool microscope is a non-contact measurement by visual observation, so that the measurement error is large, and a fixed reference surface is set when the measurement object is set on the table. Therefore, it is necessary to manually move on the table to set the measured object at the reference position. Furthermore, there are problems that the measurement operation is troublesome, such as the need to adjust the focus of an image observed with a microscope, and that there is an individual difference among the measurers.

In the invention disclosed in Japanese Patent Application Laid-Open No. Hei 6-341803, the theoretical value of the distance of a specific section when the measured object has a desired slope dimension is calculated using a trigonometric function, and the distance of the specific section is calculated. If the theoretical value agrees with the measured value, the measured object is determined to have a desired inclined dimension, and the angle of the slope of the measured object can be directly measured. However, there is a problem that it is not known how much the angle difference from the desired inclination dimension is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is a contact-type slope angle for easily measuring and displaying the slope angle of a workpiece without using a tool microscope. It is an object of the present invention to provide a measuring method and an apparatus therefor.

[0008]

According to a first aspect of the present invention, there is provided a method for measuring a slope angle of an object mounted on a top surface of a surface plate through a sign bar.
After calculating the set angle of the measured object to obtain the theoretical height of the block gauge, calculate the length of the block gauge interposed between the upper surface of the surface plate and the sine bar to calculate the inclination angle of the sine bar. The height difference between any two points having different slopes of the object to be measured is measured with a linear gauge for height measurement, and the upper surface of the platen on the sine bar of the object to be measured is calculated based on the height difference and the distance between the two points. A slope angle of the object to be measured is calculated by adding and subtracting the angle with respect to the inclination angle of the sine bar.

According to the above-described measuring method, it is not necessary to calculate the height of the block gauge with respect to the set angle using a calculator or the like, so that the measurement is simplified and the measurement time can be reduced. In addition, it is possible to directly read the number of slope angles of the measured object and the difference between the desired dimension and the desired size based on the numerical value displayed on the display unit.

According to a second aspect of the present invention, there is provided a surface plate having a horizontal upper surface, and a mounting surface on the upper surface of the surface of the measurement object which is installed so as to be rotatable and tiltable about one roller as a fulcrum. Sine bar, a block gauge interposed between the other roller of the sine bar and the upper surface of the surface plate, and a height difference at different positions on a slope of a measurement object mounted on the mounting surface of the sine bar. A linear gauge for measuring a horizontally movable height that can be measured, a linear gauge for measuring a horizontal direction that measures the amount of horizontal movement of the linear gauge for measuring height, and an input unit that inputs a set angle of the measurement object; A slope angle measuring device for an object to be measured, comprising: a calculation storage unit for calculating and storing data of an input unit and a height difference value of the linear gauge for height measurement; and a display unit for displaying the calculation result. It is.

By using the angle measuring device having the above configuration, the slope angle itself of the object to be measured can be determined by a contact type measuring instrument such as a linear gauge for height measurement, and the measurement can be performed by a tool microscope or the like. In this way, errors due to visual measurement can be eliminated, and measurement accuracy improves,
The measurement angle is displayed on the display unit as a numerical value.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in FIGS. In the figure, reference numeral 7 denotes a surface plate having an upper surface 7a formed horizontally.
a has a straight ruler portion 9 and a sine bar 8 having two rollers 10a and 10b attached to lower portions of both ends of the straight ruler portion 9;
Is installed. The mounting surface (upper surface) 9 of the straight ruler portion 9
a is formed horizontally, and at one end of the mounting surface 9a,
An upright portion 12 having a vertical surface 12a for positioning a measurement object 11 placed thereon is provided.

The two rollers 10a and 10b have the same diameter. Therefore, these rollers 10a, 1
The straight line L connecting the center axis of the straight ruler portion 9b
When the sine bar 8 is mounted on the upper surface 7a of the surface plate 7 via both rollers 10a and 10b, the mounting surface 9a of the straight edge portion 9 is positioned on the upper surface of the surface plate 7. 7
is parallel to a.

The sign bar 8 is rotatable about the axis of the roller 10a on the upright portion 12 as shown by an arrow R. At this time, the sign bar 8 is moved inadvertently. The roller 10a is fitted in a V-shaped groove 13 provided on the upper surface 7a of the surface plate 7. Reference numeral 14 denotes a block gauge serving as a height reference, and the upper surface 7a of the surface plate 7 and the sine bar 8
Is interposed between the roller 10b and the rotating side roller 10b.

Reference numeral 15 denotes a linear gauge for measuring height, which is a measuring instrument for measuring the height from the upper surface 7a of the surface plate 7 to the slope 11a of the measuring object 11 mounted on the mounting surface 9a of the straight edge portion 9. It is. The linear gauge 15 for height measurement is fixed to the upper end of an arm 17 that stands upright from a pedestal 16 that slides on the upper surface 7a of the surface plate 7 in the direction of the sine bar 8, and the measuring element 15a is It is configured to be able to contact the slope 11a and to be able to move up and down. In the figure, 1
Numeral 8 denotes a horizontal movement measuring linear gauge for measuring the amount of movement of the height measuring linear gauge 15 in the horizontal direction.

Reference numeral 19 denotes an input unit such as a keyboard of a computer, which is a set angle A in design of the measured object 11 or a pivot mounted on the block gauge 14 from the axial center of the roller 10a in contact with the surface plate 7. The distance h to the axial center of the roller 10b on the side, in other words, the numerical value of the height B of the block gauge 14 and the like are input. Reference numeral 20 denotes an operation storage unit that performs an operation in accordance with the input data and stores the result, and reference numeral 21 denotes a display unit such as a computer display that displays the operation result.

Next, a method for measuring the angle of a slope will be described below. First, when the design setting angle A ° of the measured object 11 is input to the input unit 19, the theoretical height B of the block gauge 14 is obtained from the following calculation formula in the operation storage unit 20,
Displayed on the display unit 21. B = L · sinA ° (L = center distance of roller)

Next, the upper surface 7a of the surface plate 7 and the sine bar 8
The block gauge 14 having a height B ± α near the theoretical height B displayed on the display unit 21 is interposed between the roller 10b on the rotating side of the When the numerical value of the height B ± α is input to the input unit 19, the inclination angle C ° of the sine bar 8 is obtained in the operation storage unit 20 according to the following equation, and when the value is stored, it is displayed on the display unit 21 together with ゝ. You. C ° = sin ⁻¹ ((B ± α) / L) (± α: Approximate dimensional difference from theoretical value of block gauge)

Therefore, one side of the object 11 to be measured is brought into contact with the vertical surface 12a of the upright portion 12 on the upper surface 9a of the straight ruler portion 9 so that the inclined surface 11a faces upward so as not to move. Place on. Next, the height measuring linear gauge 15 is moved in the direction of the sine bar 8 and the measuring element 15a is brought into contact with an arbitrary point 1 on the slope 11a, and then the reset key of the input section 19 is pressed. The height measuring linear gauge 15 and the horizontal movement measuring linear gauge 18 are reset to zero.

Next, the linear gauge 15 for height measurement is used.
The pedestal 16 is moved to stop the tracing stylus 15a of the linear gauge 15 for height measurement at another arbitrary point 2 on the inclined surface 11a, and then the measurement key of the input unit 19 is pressed to measure the height. Difference E of the stylus 15a by the linear gauge 15
And the movement amount D of the height measurement linear gauge 15 by the horizontal movement measurement linear gauge 18 are stored in the arithmetic storage unit 20, and the upper surface 7a of the surface plate 7 on the sine bar 8 is calculated by the following equation.
The angle F ° of the measurement object 11 with respect to is obtained. F ° = tan ⁻¹ (E / D)

The inclination angle C.degree.
The angle G ° of the measured object 11 is obtained by the addition / subtraction operation in the operation storage unit 20, and this numerical value is displayed on the display unit 21. When E <0, G ° = C ° −F °,
When E> 0, G ° = C ° + F °, and when E = 0, G ° = C °.

Here, the angle F ° occurs when ± α of the block gauge 14 or the measured object 11 is not at the designed ideal angle value of A °. In addition, the ideal angle value A °
If the actual height of the block gauge 14 is equal to the theoretical height value B of the block gauge 14 with respect to
Of course, the slope 11 a of the measurement object 11 is horizontal with respect to the upper surface 7 a of the surface plate 7.

[0023]

Since the present invention has the above configuration,
It is not necessary to calculate the height of the block gauge with respect to the measurement angle using a calculator or the like, and without using the same value as the calculated block gauge height, a block gauge with an approximate height can be obtained. It can be used to measure the slope angle of an object. Further, by determining the slope angle itself of the measurement object using a contact type measuring instrument, it is possible to eliminate an error due to visual measurement such as measurement using a tool microscope or the like. Therefore, when the measurement accuracy is improved, there are various effects that the measurement is simplified and the measurement time can be shortened.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a slope angle measuring device according to the present invention.

FIG. 2 is a schematic configuration diagram showing a measurement state of the apparatus.

FIG. 3 is an enlarged partial view of FIG. 2;

FIG. 4 is a float chart of the slope angle measuring method according to the present invention.

FIG. 5 is a schematic configuration diagram of a conventional angle measuring tool.

[Explanation of symbols]

 7 Surface Plate 7a Upper Surface 8 Sine Bar 9 Straight Ruler 9a Placement Surface 10a, 10b Roller 11 Measurement Object 11a Slope 12 Standing Part 14 Block Gauge 15 Linear Gauge for Height Measurement 15a Measuring Element 18 Linear Gauge for Horizontal Movement Measurement 19 Input Unit 20 Operation storage unit 21 Display unit

Claims (2)

[Claims] 1. A method for measuring a slope angle of an object placed on a surface of a surface plate through a sine bar, wherein a set angle of the object is calculated to obtain a theoretical height of a block gauge. Calculate the height of the block gauge interposed between the upper surface of the surface plate and the sign bar to obtain the inclination angle of the sine bar. Is measured, and the height difference
Obtaining an angle of the measured object with respect to the upper surface of the surface plate on the sine bar based on the distance between the points, and calculating a slope angle of the measured object by adding or subtracting the angle and the inclination angle of the sine bar. Slope angle measurement method. 2. A surface plate having a horizontal upper surface, and an upper surface of the surface plate,
A sine bar having a mounting surface for a measurement object installed so as to be capable of rotating and tilting with one roller as a fulcrum, and a block gauge interposed between the other roller of the sine bar and the upper surface of the surface plate. A horizontally movable height measuring linear gauge for measuring a height difference at different positions of a slope of a measurement object placed on the mounting surface of the sign bar, and measuring a horizontal moving amount of the height measuring linear gauge. A linear gauge for horizontal direction measurement, an input unit for inputting a set angle of the object to be measured, an operation storage unit for calculating and storing data of the input unit and a height difference value of the linear gauge for height measurement, and And a display unit for displaying the calculation result.