JPH06235603A - Inspecting apparatus for maximum cylindrical degree - Google Patents

Abstract

PURPOSE:To simultaneously measure the largest circle part all over the length of a columnar body and the largest circle part at a predetermined section. CONSTITUTION:There are provided a guide cylinder 1 into which a to-be- measured body can be inserted and dial gauges 5, 6, 7, 8, (7 and 8 are not shown in the drawing), 15, 16, 25, 26 at positions confronting to each other in the diametrical direction of the to-be-measured body. The dial gauges 5, 6, 7, 8, 15, 16, 25, 26 are set at three points in the longitudinal direction of the guide cylinder 1. Accordingly, both the largest circle part all over the length of the to-be-measured body and the largest circle part at a predetermined lateral cross section can be detected simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maximum cylindricity inspection device for inspecting the maximum cylindricity of an object and the maximum contour in one section. Here, the maximum cylindricity refers to the maximum outer diameter dimension over the entire length of the object, the degree of bending, twisting, and the like.

[0002]

2. Description of the Related Art Conventionally, a go-through gauge has been used to inspect the maximum cylindricity of a columnar object. For this go-through gauge, whether the maximum cylindricity is within the specified range for those whose shape accuracy is difficult to guarantee when the outer circumference of a columnar object is machined or which is deformed by processing after machining. It is used to check whether or not.

The go-through gauge has an inner diameter set to a value obtained by adding the maximum cylindricity tolerance to the outer diameter value of the columnar object to be measured, and has a cylindrical hole longer than the entire length of the columnar object. At the time of inspection, whether or not the object to be inspected passes through this cylindrical hole is used to determine whether the object is acceptable or not. In addition, the minimum contour is measured as necessary to determine whether the object is acceptable or not.

Further, when an object is bent or twisted, a difference occurs between the maximum contour in one cross section and the maximum cylindricity over the entire length. It may be necessary to inspect both the maximum contour in the cross section. However, conventionally, the maximum cylindricity was inspected by a go-through gauge, and the maximum and minimum contours in one section were inspected by another measuring means such as a caliper.

[0005]

According to the above-mentioned conventional inspection method, since the method of individually inspecting the maximum cylindricity and the contour in a predetermined cross section is taken, there is a problem that it takes a long time for the inspection. It was The present invention has been made to solve such a problem, and an object of the present invention is to provide a maximum cylindricity inspection apparatus capable of simultaneously inspecting the maximum cylindricity of a columnar object and the contour of a predetermined cross section.

[0006]

The maximum cylindricity inspection apparatus of the present invention for solving the above-mentioned problems is, in claim 1, a guide having an inner diameter obtained by adding at least the maximum cylindricity tolerance to the measured size of the object to be measured. The measuring device includes a cylinder and at least a pair of distance sensors that are provided at opposing positions in the radial direction of the object to be measured and that are provided at one or more positions in the guide cylinder full-length direction, and the distance sensor is inserted into the guide cylinder. A signal is made to collide with the outer wall of the body, and the diameter of the measured object is measured from the reflected signal.

The maximum cylindricity inspection device of the present invention is defined in claim 2.
Then, an inspection device for inspecting the maximum cylindricity over the entire length of an object having a curvature, comprising means for measuring contour deviation at at least three points of a curved portion and means for measuring a diameter at at least one point. It is characterized by that.

[0008]

According to the apparatus for inspecting maximum cylindricity of the present invention, it is possible to inspect the maximum cylindricity of a columnar object and the maximum and minimum contour values in a predetermined cross section at the same time.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. A first embodiment of the present invention is shown in FIGS.
The first embodiment is an example of a maximum cylindricity inspection device that inspects a linear cylinder having a perfect circular cross section.

In FIG. 1 and FIG. 2, a dial gauge 5 is provided at one end of the guide cylinder 1 in the longitudinal direction on four sides in the circumferential direction.
6, 7, and 8 are provided at intervals of 90 °, similarly, dial gauges 15, 16, 17, and 18 (17 and 18 are not shown) are provided at the middle portion, and dial gauges 25, 26, and 2 are provided at the other end portion.
7, 28 (27, 28 are not shown) are provided.
Further, the guide tube 1 is provided with a stopper 12 so that the product 30 to be inspected can be inspected at a predetermined axial position. A roller 9 is provided at the tip of each dial gauge to prevent abrasion with the product 30.

The procedure of the inspection method is as follows.
First, the standard sample is inserted into the guide tube 1, and each dial gauge 5, 6, 7, 8, 15, 16, 17, 18, 25, 2 is inserted.
Adjust the zero points of 6, 27 and 28. And stopper 12
And remove the standard sample. Next, the stopper 12 is set, the product 30 to be inspected is inserted into the guide tube 1 in the direction of the arrow, and it is confirmed that the product is inserted (maximum cylindricity determination),
Check that the dial gauge reading is between the maximum and minimum annulus (maximum / minimum contour determination). Next, read the reading on each gauge. This operation is repeated for each product one after another.

According to the first embodiment, the maximum wheel portion over the entire length of the product 30 can confirm the acceptance judgment by passing through the cylindrical hole of this device, and the outer diameter of each dial gauge is a pair. 5, 6, 7, 8, 15, 16, 1
The deviation from the standard sample is obtained by the sum of the indicated values of the pair of dial gauges 7, 18, 25, 26, 27, 28. In this embodiment, the diameter is 4 peripheral points, that is, 2 points in diameter are representative values. However, if a diameter measuring means such as a dial gauge is provided in the direction of 45 °, the diameters of 8 peripheral points and 4 diameters are measured. It will be possible.

In the present invention, instead of the dial gauge according to the first embodiment, it is possible to extract the deviation value electrically by a linear scale or the like, and combine this electric signal with a computer process to inspect it speedily. is there.
The hole 13 formed in the guide cylinder 1 for dial measurement is preferably formed in an oval shape in the axial direction. This is because it can be used for products with different lengths.

A second embodiment of the present invention is shown in FIGS. The second embodiment shows an example of a maximum contour inspection apparatus for detecting the maximum contour of a curved cylindrical body having a cross section of an ellipse.
The guide cylinder 31 of this device 35 has a curved cylindrical shape with the center axis of the cylinder hole having the same curvature. The cross-sectional shape is an ellipse.
The distance sensors 45, 46, 47 are provided at four locations in the circumferential direction.
48 are provided, and these distance sensors are provided at five locations in the length direction. In FIG. 3, 45, 46,
47, 48, 55, 56, 65, 66, 67, 68, 7
5, 76, 85, 86, 87, 88 (67, 68, 8
7 and 88 are not shown) indicate a distance sensor. Each distance sensor 45, 46, 47, 48, 55, 56, 6
Reference numerals 5, 66, 75, 76, 85 and 86 are used to inspect the distance by emitting a laser beam and reflecting the laser beam when it hits the side surface of the product. Further, the distance sensors 45, 46, 4
7, 48, 55, 56, 65, 66, 75, 76, 8
The outputs of 5 and 86 are taken out as electric signals and numerically processed by a computer.

According to the second embodiment, the maximum cylindricity can be inspected, and the deviation of the curvature can be calculated from the deviation of the five points at the same total length direction position. Further, according to the second embodiment, there is an effect that the maximum cylindricity and the maximum contour in a predetermined same cross section can be inspected at the same time.

[0016]

As described above, according to the maximum cylindricity inspection apparatus of the present invention, the maximum cylindricity of the inspection object can be inspected only by installing the inspection object in the guide tube of this apparatus. At the same time, it is possible to simultaneously inspect the maximum contour in the same predetermined cross section. further,
In the inspection of a curved cylindrical body, the deviation of curvature can be calculated. Therefore, there is an effect that the product inspection work can be easily performed.

[Brief description of drawings]

1 shows a first embodiment of the present invention, which corresponds to I-- of FIG.
It is a sectional view taken along line I.

FIG. 2 is a front view of the first embodiment of the present invention.

FIG. 3 shows a second embodiment of the present invention and is shown in FIG.
-III is a sectional view.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

1 guide cylinder 5, 6, 7, 8, 15, 16, 25, 26 dial gauge (inspection means) 31 guide cylinder 45, 46, 47, 48, 55, 56, 65, 66, 7
5, 76, 85, 86 distance sensor (inspection means)

Claims (2)

[Claims] 1. A guide cylinder having an inner diameter obtained by adding at least the maximum cylindricity tolerance to the measured size of the object to be measured, and at least one pair provided at positions opposite to each other in the radial direction of the object to be measured, and one position in the length direction of the guide tube And a distance sensor provided above, wherein the distance sensor measures the diameter of the measured object from the reflected signal by causing a signal to collide with the outer wall of the measured object inserted into the guide tube. Maximum cylindricity inspection device. 2. An inspection apparatus for inspecting the maximum cylindricity over the entire length of an object having a curvature, a means for measuring a contour deviation at at least three points of a curved portion, and a means for measuring a diameter at at least one point. And a maximum cylindricity inspection device.