JP2977336B2 - Shape measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shape of a concave portion and a convex portion formed on an outer circumferential surface such as a cylinder or a round bar, or on an inner circumferential surface such as a cylindrical body having a circular inner periphery. For example, the present invention relates to a shape measuring device that measures the shape of a contour of a concave portion and a convex portion, the size of the contour, the straightness of a line forming the contour, a circumferential angle that is an angle occupied by the contour in a circumferential direction, and the like.

[0002]

2. Description of the Related Art In a power steering, for example, concave portions are formed opposite to each other on a steer shaft and a shaft receiving portion for receiving the same. Oil is filled. Therefore, it is necessary that the shapes of the recesses on the steer shaft side and the shaft receiving side are as specified, and inspection of the shapes becomes important. By the way, conventionally, for example, the shape of a concave portion or a convex portion formed on the circumferential surface of a round bar such as a steer shaft fixes a microscope which is a detecting means, and manually moves an object to be measured with respect to this microscope. However, the measurement was performed by specifying the contours of the concave portions and the convex portions.

On the other hand, conventionally, the shape of a concave portion or a convex portion formed on a circumferential surface of a cylindrical body such as a shaft receiver is measured by observing the shape at an angle with respect to the axis of the object to be measured. Was.

[0004]

In a conventional method for measuring the shape of a concave portion or a convex portion formed on the circumferential surface of a round bar, detection is performed in the axial direction, around the axial line, and in the radial direction of the circumferential surface. Since the relative movement between the means and the object to be measured is performed manually, there is a problem in that accurate measurement requires skill and requires a lot of time and labor in handling. In the conventional method of measuring the shape of the concave portion or the convex portion formed on the circumferential surface of the cylindrical body, since it is observed at an angle inclined with respect to the axis of the object to be measured, it is difficult to accurately detect the shape, In addition, there is a problem that some parts cannot be detected and cannot be detected. The present invention has been made in view of the above circumstances, and provides a shape measuring apparatus capable of easily and accurately measuring the formation of a concave portion and a convex portion formed on a circumferential surface without requiring skill. Things.

[0005]

SUMMARY OF THE INVENTION The present invention is a shape measuring apparatus which is configured to detect a portion to be measured by detecting means movable about an axis of the object to be measured. Its detailed configuration is to measure the shape of a specific portion on the outer circumferential surface such as a cylinder or a round bar, or on the inner circumferential surface such as a cylindrical body whose inner circumference is circular, and A table on which the table is placed, and a table disposed in the vicinity of the table. The table can be moved relative to the table in the axial direction of the table, around the axis of the table, and in the radial direction of the table. Detecting means for detecting a specific portion of an object to be measured placed on a table, and measuring the amount of relative movement between the table and the detecting means, and placing the table on the table based on the measurement result. This is a shape measuring device provided with calculation display means for calculating and displaying the shape of a specific portion of the placed object to be measured.

The means for enabling relative movement between the table and the detecting means are, specifically, means for rotating the table, means for sliding the detecting means parallel to the axis of the table, and means for detecting relative to the axis of the table. An example includes a combination of means for sliding in the radial direction. Specific examples of the detection means include a CCD camera that optically detects a part to be measured by observing the part to be measured, and an image part that displays the detection result of the CCD camera as an image.

[0007]

The shape of the object to be measured is obtained based on the relative movement between the detecting means and the portion to be measured of the object to be measured placed on the table.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. However, the present invention is not limited by the embodiment. The shape measuring device 1 is shown in FIGS.
As shown in FIG. 5, the base 2, the table 3, the table rotating means 4 for rotating the table 3, the detecting means 5, and the table
Calculation display means 6 for measuring the amount of relative movement between the object placed on the table 3 and the detecting means 5 and calculating and displaying the shape of a specific portion of the object based on the measurement result; Is provided with a sliding means 7 for moving the table 3 in the axial direction of the table 3 (direction of arrow A). The table 3 is for placing an object to be measured, and is provided with a chuck 8 for fixing and holding the object to be measured. Table rotating means 4
Is disposed and fixed on the base 2 and includes an output motor 9;
The table 3 is rotated with respect to the base 2 in a horizontal plane. The table rotating means 4 is provided with a centering means 10 for aligning the axis of the object to be measured when placed on the table 3 with the axis of the table 3. The output mode
The data 9 is output based on the signal from the driver 27 and
Rotate Bull 3. The centering means 10 is provided in the table 3
Has a function of correcting the inclination to make the axis of the slide means parallel to the sliding direction of the slide means 7. The table rotating means 4 further comprises a rotary encoder 11 for detecting the angle of movement of the table 3 with a resolution of 5 seconds when the table 3 is rotated.
Is provided.

The detecting means 5 includes an endoscope 12 as a detecting unit.
And a CCD camera 13 that converts light from the endoscope 12 into an electric signal, and a CRT 14 that receives a signal from the CCD camera 13 and produces an image. Endoscope 12
The endoscope 12, which is of a so-called orthogonal view type, has a substantially cylindrical shape and is provided with a window for light irradiation and a window for detection in a direction orthogonal to the axis of the cylinder. Observation is possible by positioning the object and the axis in parallel. 33 is a light source means for illuminating the device under test. The detecting means 5 has an edge sensing function for automatically detecting a contour of a specific shape, and sends a data signal to the system controller 32 as to whether or not an edge is detected.

The sliding means 7 comprises a column 15 erected on the base 2, a slider 16 which slides along the column 15 in the vertical direction (the direction of arrow A), a motor 17, and a port.
Output means 19 for sliding the slider 16 in the up and down direction, including the screw 18 and the like, and the detecting means 5 held by the slider 16 and moving the detecting means 5 in the radial direction of the table 3, that is, with respect to the axis of the table 3. Direction of approach / separation (arrow B
(Main direction), and is mainly constituted by a holder 20 which is slidably held in the direction (1). The motor 17 outputs a signal based on a signal from the driver 21, and the slider 16 slides along the column 15. Between the column 15 and the slider 16,
A length measuring means 22 for detecting the amount of movement of the slider 6 in the vertical direction with a resolution of 1 μm is provided. Reference numeral 23 denotes a display unit for displaying the amount of movement obtained by the length measuring means 22.

On the other hand, the holder 20 is slid with respect to the slider 16 by manually operating the feed knob 24. 25 is a holder-2 for the slider 16
This is a clamp knob for fixing the zero position. Between the slider 16 and the holder 20, there is provided a length measuring means 26 for detecting the amount of movement with a resolution of 1 μm when the holder 20 slides toward the axis of the table 3 with respect to the slider 16. It is arranged. The movement amount detected and obtained by the length measuring means 26 is displayed on the display unit 23 as in the case of the length measuring means 22.

The operation display means 6 includes a data memory 28,
The operation unit 29, the CRT 14, the operation unit 30, and the display unit 3
1 and a system controller 32. The data memory 28 receives data signals from the rotary encoder 11, the length measuring means 22 and the length measuring means 26, and stores data relating thereto. The operation unit 29 performs a predetermined operation on the data in the data memory 28 based on a command (control) from the system controller 32.

The CRT 14 and the display unit 31 are provided with an arithmetic unit 29
The result of the calculation performed is displayed. CRT
Reference numeral 14 denotes a display unit of the detection unit 5 and / or a calculation display unit 6 based on a control signal from the system controller 32.
Works as The display unit 31 includes a liquid crystal display unit and a printer unit. The operation unit 30 is for sending a control signal to the system controller 32 so that the system controller 32 operates each unit and each unit as desired. The operation of the system controller 32 will be described later in detail in the operation of the shape measuring device 1.

The shape measuring device 1 is configured as described above. Hereinafter, the shape measurement of the concave portion formed on the inner circumferential surface of the shaft receiver of the power steering, which is a cylindrical body, using the shape measuring device 1 will be described. The contour of the concave portion whose shape is to be measured is processed so as to be square. By operating the operation unit 30, the system controller 32
Then, a control signal for causing the slide means 7 to output the motor 17 is sent to the driver 21 so that the endoscope 12 held on the slider 16 is positioned at the highest position. After this state is obtained, a shaft receiver (not shown) as an object to be measured is placed on the table 3 and the chuck 8 is mounted.
Tighten and fix with. Here, using the centering means 10,
The axis of the shaft receiver is made to coincide with the axis of the table 3, and the inclination of the axis of the table 3 is corrected so as to be parallel to the sliding direction of the slide means 7.

The endoscope 12 is positioned at an observable position on the inner peripheral surface of the shaft receiver while observing the CRT 14 by operating the feed knob 24 to slide the holder 20 in the direction of arrow B. When the positioning is completed, the knob 25 is operated to clamp the holder 20 so that the position of the holder 20 with respect to the slider 16 is maintained. Here, the operation unit 30 is operated again to move the slide means 7 from the system controller 32.
And the endoscope 12 is slid in the direction of arrow A to a position where the contour of the concave portion, which is the measured portion of the shaft receiver, can be observed.

The operation unit 30 is operated to send a control signal to the CRT 14 from the system controller 32 to cause the CRT 14 to display a reference line composed of a vertical axis and a horizontal axis. Further, a control signal for operating the table rotation means 4 from the system controller 32 by operating the operation unit 30, that is, a control signal for causing the driver 27 to output the output motor 9, rotates the table 3, and Among the contours of the concave portion, the axis parallel to the axis of the shaft receiver and the vertical axis of the reference line projected on the CRT 14 are matched. Here, the drivers 21 and 27 are operated based on the edge sensing data signal of the contour of the measured concave portion performed by the endoscope 12 so that the endoscope 12 automatically moves relatively along the contour of the measured concave portion. The measurer sends a control signal for causing the motor 17 and the output motor 9 to output to the system controller 32 by operating the operation unit 30. At the same time, after completion of the relative movement, the shape and dimensions of the contour of the concave portion to be measured, the circumferential angle of the concave portion to be measured, and the straightness of the contour line of the concave portion to be measured are calculated.
4 and a control signal to be displayed on the display unit 31 are sent from the system controller 32 to the calculation unit 29.

When the endoscope 12 automatically moves relative to the measured object along the contour of the measured concave portion, the rotary encoder 11 and the length measuring means 22 detect the amount of the relative movement and store the data in the data memory. 28 as a data signal. The arithmetic unit 29 includes the rotary encoder 11, the length measuring unit 22,
And a predetermined operation is performed by obtaining the detection signal of the length measuring means 26 from the data memory 28, and the result of the operation is
And sends it to the display unit 31. The CRT 14 and the display unit 31
The calculation result of the calculation unit 29 is displayed and printed.

As described above, the shape measuring device 1 is formed on the circumferential surface because the shape of the contour is obtained based on the relative movement between the detecting means 5 and the contour of the concave portion of the object to be measured. The contour of the concave portion can be measured simply and accurately without skill. Further, the shape of even the contour of the concave portion formed in the inner circumferential portion, which is normally inaccessible to the naked eye, can be measured.

In the above-mentioned use of the shape measuring apparatus 1, the shape and each dimension of the contour, the circumferential angle of the concave portion to be measured, and the straightness of the contour line of the concave portion to be measured are determined together. Alone can be appropriately selected and obtained. At this time, the result detected by the length measuring means 22, that is, the contour of the measured concave portion,
The distance in the axial direction is indicated on the display unit 23 by the rotary encoder 1.
The result detected by 1, that is, the circumferential angle of the measured concave portion is displayed on the display unit 31. In the shape measuring apparatus 1, the holder 20 is manually fed, but by automatically feeding, the relative movement between the detecting means 5 and the object to be measured can be completely automated.

In the shape measuring device 1, after the contour of the concave portion to be measured is projected at a predetermined position on the CRT 14, the output motor 9 and the motor 17 automatically output and perform edge sensing, and the detecting means 5 and the device to be measured Is configured to perform relative movement automatically, but it may be configured to perform relative movement by appropriately outputting the output motor 9 and the motor 17 while watching the CRT 14. In this use of the shape measuring device 1, the object to be measured is a cylindrical body and its inner peripheral surface side is measured. In addition, the object to be measured is a round bar and formed on the circumferential surface thereof. The shape of the concave portion and the convex portion can be measured.

[0021]

According to the present invention, there is provided a detecting means which can move relative to the object to be measured in the axial direction of the object to be measured, around the axis, and in the radial direction of the object to be measured. By measuring the shape based on the relative movement of the object, the shape of a specific part such as a concave part or a convex part on the circumferential surface to be measured can be easily and accurately measured without skill. It is a shape measuring device that can be used. In addition, the effect is obtained that the shape of even the contour of the concave portion formed in the inner circumferential portion that cannot be normally reached by the naked eye can be measured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing an operation of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shape measuring device 3 Table 4 Table rotating means 5 Detecting means 6 Calculation display means 7 Slide means 11 Rotary encoder 12 Endoscope (Detecting means) 13 CCD camera (Detecting means) 22, 26 Length measuring means

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makoto Suzuki 56-4 Karaike, Sumiyoshi-cho, Anjo-shi, Aichi Prefecture Mitutoyo Anjo Office (56) References JP-A-2-253107 (JP, A) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) G01B 11/00-11/30 102 G01B 21/00-21/32

Claims (1)

(57) [Claims] An object for measuring a shape of a specific portion on an outer circumferential surface such as a cylinder or a round bar, or an inner circumferential surface such as a cylindrical body having a circular inner circumference. The table to be placed and the table are arranged in the vicinity of the table.
Detecting means for detecting a specific portion of an object to be measured placed on the table, which can be relatively moved around the axis of the table and in the radial direction of the table, and the relative movement between the table and the detecting means A shape measuring device comprising an arithmetic display means for measuring the amount of the object and calculating and displaying the shape of a specific portion of the measured object placed on the table based on the measurement result.