JPH08304037A - Measuring apparatus for forged shaft - Google Patents

Abstract

PURPOSE: To obtain a measuring apparatus by which the outside diameter size, the eccentricity and the circularity of a forged shaft are measured safely without relying on the experience of an operator by projecting a slit light from a slit-light projector onto the side face of the forged shaft which is turned and fetching an image in an irradiated part with a motion-picture camera at every rotation at a constant angle until the forged shaft makes one rotation. CONSTITUTION: A slit light is projected from a slit-light projector 1 to the side face of a forged shaft (a) which is gripped and held so that its shaft core comes in a horizontal state, and a slit-light irradiated part 1a which is slender in the up-and-down direction in a direction perpendicular to the horizontal shaft core is projected onto the side face of the shaft (a). The projected irradiated part 1a is photographed by a motion-picture camera 2 every rotation of the shaft (a) of a constant angle by a rotation mechanism 4, and images are fetched by a computing and processing means 5 until the shaft makes one rotation. In the computing and processing part 5, the images of the irradiated part 1a are image-processed so as to be extracted out of the respective fetched images, their central lines are found so as to be computed and processed according to the procedure of an optical cutting method, and the partial cross-sectional shape of the forged shaft (a) is found.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-section outer diameter dimension of a forged shaft, a center misalignment between a center of gravity of a cross-section shape and a rotary shaft,
The present invention relates to a measuring device for a forged shaft that measures the roundness of a cross-sectional shape.

[0002]

2. Description of the Related Art Conventionally, an operator measures the cross-sectional outer diameter of a shaft forged by a press machine by using an outer path (name of a mechanical external dimension measuring instrument). Further, the center of gravity of the cross-sectional shape of the shaft forged by the press machine and the misalignment of the rotary shaft, and the roundness of the cross-sectional shape have been determined by visual inspection by the operator.

[0003]

However, the measurement of the outer diameter of the forged shaft by the operator using the conventional outer path (name of the mechanical external dimension measuring instrument) is performed by measuring the distance between the forged shaft and the high temperature forged shaft. It was very dangerous because there was a risk of burns because it was approaching 1 m. Also, in order to be able to visually judge the misalignment and roundness of the forged shaft,
Many years of experience were needed.

The present invention has been made in view of the above problems and was devised to solve the problems. The purpose of the present invention is forging safely and without relying on many years of experience of workers. An object of the present invention is to provide a measuring device for a forged shaft, which is capable of measuring the outer diameter dimension, misalignment, roundness, etc. of the shaft.

[0005]

In order to achieve the above object, the invention of claim 1 projects a slit light to a forged shaft horizontally held by a rotating mechanism in a direction orthogonal to the forged shaft. The slit light projector, the camera that shoots the slit light irradiation unit that is projected on the forged shaft, and the image of the slit light irradiation unit that is projected on the forged shaft that is rotated at a fixed angle by the rotating mechanism Each time it rotates, it is captured by a camera and captured, the slit light irradiation part is extracted from the captured image and the partial cross-sectional shape of each rotation angle of the forged shaft is obtained. It has at least a calculation processing means for connecting the overlapping parts so that they match each other best to obtain the overall cross-sectional shape of the forged shaft, and a display means for displaying the content measured by the calculation processing means. It is made from formed.

According to the second aspect of the invention, the forged shaft horizontally held by the rotating mechanism projects the slit light in a direction orthogonal to the forged shaft, and the forged shaft projects the slit light. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. An arithmetic processing means for obtaining the overall cross-sectional shape of the shaft and measuring the outer diameter dimension from the obtained overall cross-sectional shape of the forged shaft, and a display means for displaying the content measured by the arithmetic processing means are provided. Which has the constitution comprising even without.

According to the invention of claim 3, a slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and a forged shaft are projected. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. A calculation process that obtains the overall cross-sectional shape of the shaft and measures the misalignment from the deviation between the center of gravity of the overall cross-sectional shape of the forged shaft and the rotation center position of the forged shaft at the first measurement reference position. Means and a display means for displaying the measured content by the arithmetic processing unit is made of at least comprises configuring the.

According to the invention of claim 4, a slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by the rotating mechanism, and a forged shaft. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. The overall cross-sectional shape of the shaft is obtained, and the maximum diameter and the minimum diameter are obtained from the distance between the two points at which a plurality of straight lines passing through the center of gravity of the obtained overall cross-sectional shape of the forged shaft intersect the cross-sectional contour line. And processing means for measuring the roundness and obtains the difference between the maximum and minimum diameters, and a display means for displaying the measured content by the arithmetic processing unit is made of at least comprises configuring the.

Further, according to the invention of claim 5, a slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by the rotating mechanism, and a forged shaft are projected. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. Obtain the overall cross-sectional shape of the shaft, measure the outer diameter dimension from the obtained overall cross-sectional shape of the forged shaft, and determine the center of gravity of the overall cross-sectional shape of the forged shaft at the first measurement reference position. And processing means for measuring the misalignment from the deviation between the rotational center position of the forged shaft, and a display means for displaying the measured content by the arithmetic processing unit is made of at least comprises configuring the.

Further, according to the invention of claim 6, a slit light projector for projecting slit light in a direction perpendicular to the forged shaft, which is horizontally held by the rotating mechanism, and a forged shaft are projected. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. Obtain the overall cross-sectional shape of the shaft, measure the outer diameter dimension from the overall cross-sectional shape of the obtained forged shaft, and cross the multiple straight lines passing through the center of gravity of the overall cross-sectional shape of the obtained forged shaft. The maximum diameter and the minimum diameter are obtained from the distance between the two points intersecting the shape line, and the roundness is measured by obtaining the difference between the maximum diameter and the minimum diameter. And a display unit for displaying the contents.

Further, according to the invention of claim 7, a slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by the rotating mechanism, and a forged shaft are projected. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. Obtaining the overall cross-sectional shape of the shaft, measuring the misalignment from the deviation between the center of gravity position of the overall cross-sectional shape of the forged shaft and the rotation center position of the forged shaft at the first measurement reference position, and The maximum diameter and the minimum diameter are calculated from the distance between the two points where a plurality of straight lines passing through the center of gravity of the entire cross-sectional shape of the forged shaft intersect with the cross-sectional contour line, and the difference between the maximum diameter and the minimum diameter is calculated to obtain the true value. It is configured to include at least an arithmetic processing unit that measures the roundness and a display unit that displays the content measured by the arithmetic processing unit.

The invention of claim 8 is a slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and a forged shaft. An image of the slit light irradiation part and an image of the slit light irradiation part projected on a forged shaft that is rotated at a fixed angle by a rotating mechanism are taken and captured by the camera every time it is rotated. The slit light irradiation part is extracted from the image to determine the partial cross-sectional shape of the forged shaft at each rotation angle, and the forging shaft is connected so that the overlapping portions of the partial cross-sectional shape at each rotation angle match each other forging. Obtain the overall cross-sectional shape of the shaft, measure the outer diameter dimension from the obtained overall cross-sectional shape of the forged shaft, and determine the center of gravity of the overall cross-sectional shape of the forged shaft at the first measurement reference position. The misalignment is measured from the deviation from the center of rotation of the forged shaft, and the maximum distance is determined from the distance between the two points where the straight lines passing through the center of gravity of the overall cross-sectional shape of the forged shaft intersect the cross-sectional contour line. A configuration including at least a calculation processing means for determining a roundness by determining a diameter and a minimum diameter, a difference between the maximum diameter and the minimum diameter, and a display means for displaying the content measured by the calculation processing means. It will be.

[0013]

The present invention having the above-described structure operates as follows. Slit light is projected from the slit light projector to the side surface of the forged shaft that is rotated at a constant angle by a rotating mechanism, and the image of the slit light irradiation unit is processed by the camera until it rotates once at a constant angle. Take in. The arithmetic processing means extracts the slit light irradiation portion from the captured image and calculates the partial cross-sectional shape of the forged shaft of the slit light irradiation portion by the arithmetic processing. The obtained forged shaft is connected so that the overlapping portions of the partial cross-sectional shapes for each rotation angle are best matched, and the overall cross-sectional shape of the forged shaft is obtained. From the overall cross-sectional shape of the obtained forged shaft, the outer diameter dimension, misalignment, roundness, etc. are measured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more concretely with reference to the embodiments shown in the drawings. Here, FIG. 1 is an overall schematic view of a measuring device for a forged shaft, FIG. 2 is a partial schematic side view of a measuring device for a forged shaft, FIG. 3 is an overall schematic system diagram of a measuring device for a forged shaft, and FIG. 4 is a forged shaft. 6 is a schematic view of partial division measurement of FIG. 5, FIG. 5 is a partial sectional shape view of the forged shaft, FIG.
(A) ~ (F) is a connection schematic diagram of the partial cross-sectional shape of the forged shaft, Fig. 7 is a measurement schematic diagram of misalignment, Fig. 8 is a schematic diagram of calculation of the position of the center of gravity, and Fig. 9 is a schematic diagram of measurement of circularity. is there.

In the figure, a slit light projector 1 is a device for projecting an elongated slit light in a direction orthogonal to the forged shaft a to a forged shaft a which is horizontally held by a rotating mechanism. By the slit light thus produced, an elongated slit light irradiating section 1a is projected on the side surface of the horizontal forged shaft a in the vertical direction perpendicular to the horizontal. The slit light projector 1 is controlled by the arithmetic processing means 5.

The photographing device 2 is a device for photographing the elongated slit light irradiating portion 1a which is vertically projected on the side surface of the forged shaft a, and the photographed image is sent to the arithmetic processing means 5 through a cable to input the image. Are taken in. Camera 2
For example, a CCD (charge coupled device) -TV camera is used. The photographing device 2 is controlled by the arithmetic processing means 5.

The slit light projector 1 and the photographing device 2 are fixed and mounted horizontally on both sides of the horizontal shaft 3a above the mounting support 3. Further, the slit light projector 1 is fixed to the horizontal shaft 3a so that the forged shaft a held horizontally can be irradiated with slit light in a direction orthogonal to the forged shaft a. Further, a television 2a for viewing an image in which slit light is projected is provided on the side surface of the forged shaft a projected by the CCD-TV camera of the camera 2.

The rotating mechanism 4 is a mechanism for holding the one end of the forged shaft a which is in a high temperature state immediately after being pressed by the press machine and rotating the forged shaft a while keeping its axis horizontal. The shaft a is rotated once around its axis. In this case, the rotation of the rotating mechanism 4 is controlled by the arithmetic processing means 5 so that the forged shaft a does not rotate continuously, rotates a fixed angle, stops for a while, and then intermittently rotates again by a fixed angle.

The arithmetic processing means 5 captures an image of the slit light irradiation section 1a projected on the forged shaft a rotated by the rotating mechanism 4 at a constant angle by the camera 2 every time it rotates by a constant angle. , The slit light irradiation portion 1a is extracted from the captured image to obtain the partial cross-sectional shape of the forged shaft a for each rotation angle, and the overlapping portion of the partial cross-sectional shape of the forged shaft a for each rotation angle is best matched. To obtain the entire cross-sectional shape of the forged shaft a. A personal computer, for example, is used as the arithmetic processing means 5. Further, the personal computer of the arithmetic processing means 5 is provided with an image processing board for image-processing the video from the CCD-TV camera of the photographing device 2. Also,
A keyboard 5a is provided in the personal computer, and data can be input to the arithmetic processing means 5 from this keyboard 5a.

In addition to the above, the arithmetic processing means 5 appropriately measures the outer diameter dimension from the entire cross-sectional shape of the obtained forged shaft a as required, and the forged shaft at the first measurement reference position. The misalignment is measured from the deviation between the position of the center of gravity of the overall cross-sectional shape of a and the position of the center of rotation of the forged shaft a, or a plurality of straight lines passing through the center of gravity of the obtained overall cross-sectional shape of the forged shaft a are cross-sectional outlines. The roundness is adjusted so that the maximum diameter and the minimum diameter are obtained from the distance between the two points that intersect with, and the difference between the maximum diameter and the minimum diameter is obtained to measure the roundness.

The display means 6 displays the contents measured by the arithmetic processing means 5, and the display means 6 displays, for example, a display device for displaying the measured contents on the screen or prints the measured contents. A printer device or the like is used. The operator can recognize the content measured by the arithmetic processing means 5 through the display means 6.

The operation based on the configuration of the above embodiment will be described below. First, the forged shaft a immediately after being pressed by a press machine (not shown) is held by the rotating mechanism 4 such that one end of the forged shaft a is held and the shaft center is in a horizontal state. Before and after this work, the mounting support 3 is installed at a position apart from the side surface of the forged shaft a by a certain distance, and the slit light projector 1 and the photographing device are provided on both sides of the horizontal shaft 3a above the mounting support 3. Fix 2 so that it does not move and attach it. In this case, the slit light projector 1 detects the slit light emitted from the slit light projector 1 from the forged shaft a.
Mount so that it is perpendicular to the horizontal axis of. Further, the photographing device 2 is attached so that the slit light irradiation portion 1a projected on the side surface of the forged shaft a can be photographed.

After the above preparation is completed, the arithmetic processing means 5 is activated. The operation of the arithmetic processing means 5 is performed by input from the keyboard 5a of the personal computer. By the operation of the arithmetic processing means 5, slit light is radiated from the slit light projector 1 toward the side surface of the forged shaft a held so that the axis is in a horizontal state, and the side surface of the forged shaft a is aligned with the horizontal axis. On the other hand, an elongated slit light irradiation unit 1a is projected in the vertical direction in the orthogonal direction.

The vertically elongated slit light irradiating portion 1a projected on the side surface of the forged shaft a is photographed by the photographing device 2 and the image thereof is taken into the arithmetic processing means 5. After that, the rotating mechanism 4 rotates the forged shaft a by a certain angle (for example, 30 degrees) and stops, and the slit light irradiation unit 1a projected on the side surface of the forged shaft a at that angle is photographed by the photographing device 2 and the image thereof is obtained. Is arithmetic processing means 5
Is taken into. Again, the rotating mechanism 4 rotates the forged shaft a by a certain angle (for example, 30 degrees) and stops, and the slit light irradiation unit 1a projected on the side surface of the forged shaft a at that angle is photographed by the photographing device 2 and the image thereof is obtained. Are taken into the arithmetic processing means 5. Following the same procedure, the forging shaft a is rotated by the rotating mechanism 4 at a constant angle (for example, 30 degrees).
Each time it is rotated, the slit light irradiation unit 1a projected on the side surface of the forged shaft a at that angle is photographed by the photographing device 2, and the image is taken into the arithmetic processing means 5. This operation is continued until the forged shaft a makes one revolution (see FIG. 4).

The arithmetic processing means 5 extracts the image of the slit light irradiating portion 1a from each of the captured images by image processing, obtains the center line thereof, and obtains the partial cross-sectional shape of the forged shaft a by arithmetic processing. The method of obtaining the partial cross-sectional shape is performed according to the well-known procedure of the light-section method. For example, as shown in FIG. 5, a plurality of partial cross-sectional shapes R1 to R12
Is found.

Adjacent partial sectional shapes R1, R2 and R2
, R3, ..., The partial cross-sectional shapes are connected in order so that the overlapping portions of R12 and R1 best match. However, in that case, the rotation angle of the partial cross-sectional shape is considered. For the connection, an algorithm that minimizes the deviation (square error) in the overlapping part is used.

In order to make a connection in which the overlapping portions of adjacent partial cross-sectional shapes R1 and R2 are best matched, FIG.
As shown in (A) to (F), it is performed as follows. That is, the V point and R of R1 of the partial cross-sectional shape of FIG.
The partial cross-sectional shape R2 is moved so that the U points of 2 coincide with each other. After matching the V point of R1 and the U point of R2 of the partial cross-sectional shape, R2 of the partial cross-sectional shape is rotated by 30 degrees about the U point (see FIG. 7B).

Next, the partial cross-sectional shape R2 is translated along R1 and finally connected to the Z-point side opposite to the point V of the partial cross-sectional shape R1 in an optimum state. When translating the partial cross-sectional shape R2 in parallel, consider an imaginary horizontal line n at equal intervals as shown in FIG. The U point of R2 of the partial cross-sectional shape is vertically moved by one graduation of the virtual horizontal line n, and is moved laterally along the imaginary horizontal line n1 of the first graduation, and the intersecting points of the intersecting partial cross-sectional shapes R1 and R2. Then, the area is moved to a position where the sum of the areas T1 and T2 to be built above and below = (T1 + T2) is minimized, and the minimum area is stored (see FIG. 7D).

Subsequently, the U point of R2 of the partial sectional shape is vertically moved by one scale of the virtual horizontal line n, and is moved laterally along the virtual horizontal line n2 of the second scale to intersect the partial sectional shape. R1 and R2 are moved to a position where the sum of (T1 + T2) of areas T1 and T2 created above and below the intersection is the minimum, and the minimum area is stored.

Similarly, the point U of R2 of the partial cross-sectional shape is similarly vertically moved by one scale of the imaginary horizontal line n, and laterally moved along the imaginary horizontal line n to obtain the minimum area (T
1 + T2) is the smallest part in the group, and the partial cross-sectional shapes R1 and R2 are overlapped and connected (see (E) and (F) in the same figure).

Next, the partial cross-sectional shapes R2 and R3 are overlapped and connected by the same processing method as described above. In the following, the partial cross-sectional shapes R3 and R4, R4 and R5, ..., R
11 and R12 and R12 and R1 are overlapped and connected by the same processing method as described above to obtain the entire cross-sectional shape of the forged shaft a.

From the overall cross-sectional shape of the obtained forged shaft a, the outer diameter is measured by the same method as in the first half of the roundness measurement described later. For example, as shown in FIG. 9, the center of gravity GX of the entire cross-sectional shape of the obtained forged shaft a.
The outer diameter dimension is measured from the distance between two points, which are points where a plurality of straight lines L passing through intersect with the outline of the cross section.

The misalignment of the obtained forged shaft a is measured from the center of gravity position GX of the forged shaft a at the first measurement reference position and the rotation mechanism, as shown in FIG. 4 is obtained by measuring the misalignment from the misalignment with the rotation center position GR of the forged shaft a rotated by 4. The misalignment measured by the arithmetic processing means 5 is displayed on the display means 6 and is recognized by the operator. Center of gravity position G of the entire cross-sectional shape of the forged shaft a
X is calculated as follows, as shown in FIG.
Here, s1 and s2 are trapezoidal areas, x1 and x2 are trapezoidal barycentric positions, GX is a closed curve barycentric position, that is, the barycentric position of the entire cross-sectional shape of the forged shaft a, and S is the entire area, that is, the entire cross-section of the forged shaft a. Assuming the area of the shape, the position of the center of gravity of the closed curve GX = (s1 · x1 + s2 · x2 + ·
··· + Sn · xn) / S holds. To use the above equation, we must find the area of the trapezoid and the position of the center of gravity. Here, the center of gravity of the trapezoid can be calculated by the following equation. Center of gravity position of trapezoid x1 = (2X1Y1 + X1Y2 + X2Y
1 + 2X2Y2) / 3 (Y1 + Y2) Trapezoidal area s1 = (Y1 + Y2). (X2-X1) / 2 Total area S = s1 + s2 + ... + Sn

Further, the roundness is measured from the entire cross-sectional shape of the obtained forged shaft a. As shown in FIG. 9, a plurality of straight lines L passing through the center of gravity GX of the obtained forged shaft a are obtained. The maximum diameter L _max and the minimum diameter L _min are calculated from the distance between the two points that intersect with the cross-section contour line, and the maximum diameter L
_It is obtained by finding the difference between _max and the minimum diameter L _min . The roundness measured by the arithmetic processing means 5 is displayed on the display means 6 and is recognized by the operator.

The present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0036]

As is apparent from the above description, according to the construction of claim 1, forging is performed without approaching a dangerous high temperature forged shaft, safely and without relying on many years of experience of an operator. The overall cross-sectional shape of the shaft can be measured.

According to the second aspect of the invention, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft, and safely and without relying on the operator's many years of experience. The outer diameter of the shaft can be measured.

According to the third aspect of the present invention, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft, and safely and without relying on the operator's many years of experience. The misalignment of the shaft can be measured.

According to the structure of claim 4, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerously high temperature forged shaft, and safely and without relying on the operator's many years of experience. The roundness of the shaft can be measured.

According to the structure of claim 5, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft, and safely and without relying on the operator's many years of experience. It is possible to measure the outer diameter dimension and the misalignment of the shaft.

According to the structure of claim 6, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft and safely and without relying on the operator's many years of experience. The outer diameter dimension and roundness of the shaft can be measured.

According to the configuration of claim 7, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft and safely and without relying on the operator's many years of experience. The shaft misalignment and roundness can be measured.

According to the structure of claim 8, the entire cross-sectional shape of the forged shaft can be measured without approaching the dangerous high temperature forged shaft and safely and without relying on the operator's many years of experience. It is possible to measure the outer diameter dimension, misalignment and roundness of the shaft.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a forged shaft measuring apparatus showing an embodiment of the present invention.

FIG. 2 is a partial schematic side view of a forged shaft measuring apparatus showing an embodiment of the present invention.

FIG. 3 is an overall schematic system diagram of a forged shaft measuring device showing an embodiment of the present invention.

FIG. 4 is a schematic view of partial division measurement of a forged shaft showing an embodiment of the present invention.

FIG. 5 is a partial sectional shape view of a forged shaft showing an embodiment of the present invention.

6 (A) to (F) are schematic connection diagrams of a partial cross-sectional shape of a forged shaft showing an embodiment of the present invention.

FIG. 7 is a schematic diagram of measurement of misalignment showing an embodiment of the present invention.

FIG. 8 is a schematic diagram of calculation of a center of gravity position showing an embodiment of the present invention.

FIG. 9 is a schematic diagram of roundness measurement showing an embodiment of the present invention.

[Explanation of symbols]

 1 Slit Light Projector 1a Slit Light Irradiator 2 Camera 2a Television 3 Mounting Support 3a Horizontal Axis 4 Rotation Mechanism 5 Arithmetic Processing Means 5a Keyboard 6 Display Means a Forged Shaft

Front page continuation (72) Inventor ▲ Grandchild ▼ ▲ Akatsuki ▼ 1-14 Bunkyo-cho, Nagasaki City, Nagasaki Prefecture Nagasaki University Faculty of Engineering

Claims (8)

[Claims] 1. A slit light projector for projecting a slit light in a direction orthogonal to the forged shaft horizontally held by a rotating mechanism, and an image of a slit light irradiation unit projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. Arithmetic processing means, display means for displaying the content measured by the arithmetic processing means,
A measuring device for a forged shaft, comprising: 2. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and an image of a slit light irradiation part projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. An arithmetic processing means for measuring the outer diameter dimension from the obtained overall cross-sectional shape of the forged shaft, and a display means for displaying the content measured by the arithmetic processing means,
A measuring device for a forged shaft, comprising: 3. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and an image of the slit light irradiation part, which is projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. An arithmetic processing means for measuring the misalignment from the deviation between the center of gravity position of the entire cross-sectional shape of the forged shaft and the rotational center position of the forged shaft at the first measurement reference position, and an arithmetic processing means Display means for displaying the contents measured in
A measuring device for a forged shaft, comprising: 4. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and a slit light irradiation part, which is projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. , The maximum diameter and the minimum diameter are obtained from the distance between two points, which are points where a plurality of straight lines passing through the center of gravity of the entire cross-sectional shape of the obtained forged shaft intersect with the cross-section contour line, and the maximum diameter and the minimum diameter are calculated. And processing means for measuring the roundness and determining a difference, and display means for displaying the measured contents processing means,
A measuring device for a forged shaft, comprising: 5. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and an image of the slit light irradiation unit projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. The outer diameter of the obtained forged shaft is measured, and the center of gravity of the forged shaft is measured at the first measurement reference position and the forged shaft is rotating. And processing means for measuring the misalignment from the deviation between the position, and a display means for displaying the measured contents processing means,
A measuring device for a forged shaft, comprising: 6. A slit light projector that projects slit light in a direction orthogonal to the forged shaft horizontally held by a rotating mechanism, and an image of a slit light irradiation unit projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. The outer diameter is measured from the overall cross-sectional shape of the obtained forged shaft, and a plurality of straight lines passing through the center of gravity of the overall cross-sectional shape of the obtained forged shaft intersect with the cross-sectional contour line. Determine the maximum and minimum diameters from the distance between points, and display means for displaying an arithmetic processing means for measuring the roundness and obtains the difference between the maximum and minimum diameters, the measured contents processing means,
A measuring device for a forged shaft, comprising: 7. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and an image of the slit light irradiation part projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. , The center of misalignment is measured from the deviation between the center of gravity of the entire cross-sectional shape of the forged shaft and the center of rotation of the forged shaft at the first measurement reference position, and The roundness is measured by finding the maximum diameter and the minimum diameter from the distance between two points, which are the points where a plurality of straight lines passing through the center of gravity of the body cross section intersect with the cross sectional outline, and then finding the difference between the maximum diameter and the minimum diameter. Arithmetic processing means, display means for displaying the content measured by the arithmetic processing means,
A measuring device for a forged shaft, comprising: 8. A slit light projector for projecting slit light in a direction orthogonal to the forged shaft, which is horizontally held by a rotating mechanism, and an image of the slit light irradiation part projected on the forged shaft. Every time the image of the slit light irradiation part projected on the forging shaft rotated by the photographing device and the forging shaft rotated by the rotating mechanism is rotated by a certain angle, the image is taken and captured by the camera, and the slit light irradiation part is taken from the captured image. To obtain the partial cross-sectional shape of the forged shaft for each rotation angle, and connect so that the overlapping portions of the partial cross-sectional shape of the forged shaft for each rotation angle match best to obtain the overall cross-sectional shape of the forged shaft. The outer diameter of the obtained forged shaft is measured, and the center of gravity of the forged shaft is measured at the first measurement reference position and the forged shaft is rotating. The misalignment is measured from the misalignment with the position, and the maximum diameter and the minimum diameter are calculated from the distance between the two points where a plurality of straight lines passing through the center of gravity of the overall cross-sectional shape of the obtained forged shaft intersect with the cross-sectional contour line. Obtained, arithmetic processing means for measuring the roundness by obtaining the difference between the maximum diameter and the minimum diameter, display means for displaying the content measured by the arithmetic processing means,
A measuring device for a forged shaft, comprising: