JP2503091Y2 - Shape inspection device for circular objects - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape inspection device for inspecting the appearance of a circular object such as a cylindrical ring made by forging.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, when a visual inspection is conducted in the manufacture of a forged ring for a bearing outer ring,
Place one ring, which is the object to be inspected W, on the inclined surface plate 1 one by one,
The lower side of the inspection object W is supported by two rotatable rollers 2 so that the inspection object W can be rotated on the surface plate 1.

Then, the dial gauge 3 is brought into contact with the object W to be inspected, and the inspector manually rotates the object W to be inspected, and the dial gauge 3 is read to distinguish good products from defective products. At this time, as shown in FIG. 7, it is visually judged whether or not there is a defect in the squareness of the ring, the roundness, the end surface irregularity, and the outer peripheral cutout.

[0004]

In the conventional manual inspection method using a tilted surface plate, the dial gauge scale is visually read, so that the reading is incomplete, and much labor and labor are required. Was spent.

Therefore, as an automatic inspection method that does not require manual labor, the object to be inspected is placed on two parallel rollers, and the outer peripheral surface of the upper part of the object to be inspected is pressed by a pressure roller and is applied by a drive motor. There is a method of rotating an object to be inspected by rotating a pressure roller and inspecting it by using a detection sensor.

However, it is difficult to position the device under test, in the case of perpendicularity measurement, since the placing of the device under test on the two parallel rollers, there is a right angle defect to be inspected However, the amount of change in the measured value did not appear and the squareness could not be reflected. Therefore, the inspection result is not reliable, and the quality of the inspection object is not stable.

In view of the above, the present invention has an object of providing a shape inspection device for a circular object which does not require manual labor and has improved inspection reliability.

[0008]

As shown in FIG. 1, a means for solving the problems according to the present invention is such that a reference plate 20 on which a circular inspection object W is placed and an outer peripheral surface of the inspection object W can freely come into contact with and separate from each other. At least one of the plurality of support rollers 21 to 25, positioning means for moving the support rollers 21 to 25 to position the object W to be inspected, and at least one of the support rollers 21 to 25.
And a shape sensor 33 for measuring the external shape of the inspection object W rotating on the reference plate 20.
2 sets of shape inspecting machines A and B each including
Reversing means 10 for reversing 180 degrees and sorting means 11 for separating the inspected object W into good products and defective products according to the measurement result.
And a transport means 1 for intermittently transporting the inspection object W in one direction.
2, and the shape inspecting machine A, the reversing means 10, the shape inspecting machine B, and the selecting means 11 in this order from the upstream side in the transport direction of the object W to be inspected.
Are juxtaposed.

[0009]

In the means for solving the above problems, the first shape inspection machine A
The support rollers 21 to 25 are brought close to the object W to be inspected mounted on the reference plate 20 and pressed against the object W to be inspected. As a result, the inspection object W is positioned on the reference plate 20.

When the upper support roller 23 is rotationally driven,
The object W to be inspected is rotated on the reference plate 20. Then, the squareness, roundness, end surface unevenness, chipped outer circumference, etc. of the object W to be inspected are measured by the shape sensors 33 to 36. At this time,
The object W to be inspected and the lower supporting rollers 21 and 22 are in point contact with each other.
Therefore, if there is a defect in the squareness of the inspection object W,
The support rollers 21 and 22 are tilted in the width direction,
Displacement significantly appears on the end face of the outer periphery of the inspection body W.

Next, the object W to be inspected on the reference plate 20 is sent in the direction of the case 40 of the reversing means 10 by the carrying means 12 and is housed in the case 40. Then, when the case 40 rotates 180 degrees, the inspection object W is inverted.
The object W to be inspected is again pushed out of the case 40 by the carrying means 12 and is carried onto the reference plate 20 of the second shape inspection machine B.

Also in the second shape inspection machine B, the inspection object W
Is positioned and the surface opposite to the previous one is similarly inspected. The quality of the inspected object W is judged from the measurement results of both surfaces by the first and second shape inspecting machines A and B. Then, the object W to be inspected is sent out separately into a good product and a defective product.

By repeating such an operation, the object W to be inspected is supplied one by one each time the conveying means 12 is intermittently operated, and the squareness of the object W to be inspected and the shape of the end face portion are automatically obtained. Abnormalities are continuously inspected.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram of a shape inspection apparatus showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of an inspection machine, FIG. 3 is a layout diagram of a shape sensor of the inspection machine, and FIG. FIG. 5 is a diagram showing an example of measurement results, and FIG. 5 is a diagram showing an example of measurement results of defective products.

As shown in FIG. 1, the shape inspection apparatus of this embodiment is for automatically inspecting the external shape of a circular inspection object W such as an outer ring of a bearing.
Two sets of shape inspecting machines A and B for automatically inspecting, the reversing means 10 for reversing the inspected object W by 180 degrees, and the sorting for classifying the inspected object W into a good product and a defective product according to the measurement result. Means 11, conveying means 12 for intermittently conveying the inspection object W in one direction, supply means 13 for supplying the inspection object W to the shape inspection machine A, shape inspection machines A and B, and driving of each means A control unit for determining control and measurement results, and supplying means 13, a first shape inspecting machine A, a reversing means 10, a second shape inspecting machine B in this order from the upstream side in the transport direction of the object W to be inspected. The sorting means 11 are juxtaposed.

As shown in FIG. 2, the shape inspecting machines A and B include a reference plate 20 on which an object W to be inspected is mounted and a plurality of support rollers 21 to 21 which can be brought into contact with and separated from the outer peripheral surface of the object W to be inspected. 25, positioning means for moving the supporting rollers 21 to 25 to position the object W to be inspected, driving means 26 for rotationally driving one of the supporting rollers, and object to be inspected rotating on the reference plate 20. And a shape sensor for measuring the external shape of W.

The reference plate 20 has a flat surface on which the object W to be inspected is placed, and the flat surface is inclined by 30 degrees with respect to the horizontal plane.

The support rollers 21 to 25 are composed of four guide rollers 21 to 24 facing the outer peripheral surface of the object W to be inspected and a pressing roller 25 opposed to the front end surface of the object W to be inspected.

Of the four guide rollers 21 to 24, the two lower guide rollers 21 and 22 located on the lower side are rotatably mounted on the lower guide body 27, and with respect to the outer peripheral surface of the inspection object W. It is a small-diameter roller that comes into point contact, and supports an object W to be inspected, which tries to slide down the reference plate 20, from below. The lower guide body 27 is supported by the apparatus body so as to be movable in a direction parallel to the reference plate 20, and is moved toward and away from the object W to be inspected by an air cylinder.

Two upper guide rollers 2 located on the upper side
Reference numerals 3 and 24 have a diameter larger than that of the lower guide rollers 21 and 22, have a length that makes surface contact with the outer peripheral surface in the width direction of the object W to be inspected, and are attached to the upper guide body 28, respectively. Further, in order to facilitate the rotational movement of the inspection object W, the outer peripheral portions of the upper guide rollers 23, 24 are made of oil-resistant and abrasion-resistant rubber, and the inspection object W is easily rotated by a frictional force. are doing.

The upper guide roller 23 on one side is a roller driven to rotate, and a motor 26 as a driving means is provided.
Is attached to the motor shaft 26a. The object to be inspected W
A rotation sensor for detecting one rotation of the reference plate 20 is attached to the back surface of the reference plate 20.

On the other hand, the upper guide roller 24 on the other side has a roller shaft 29 movably supported on the upper guide body 28.
Is rotatably supported by the spring 30 and is urged by the spring 30 in a direction to come into contact with the object W to be inspected, so that the rotational shake due to the deformation of the object W to be inspected is released and the object W is smoothly rotated. In addition, the upper guide body 28 is also the lower guide body 27.
It has the same configuration as.

The pressing roller 25 is rotatably supported by a roller shaft 32 supported by the front guide body 31, and the front guide body 31 is movable in the direction of the object W to be inspected by an air cylinder. The object W to be inspected is the reference plate 20.
Press on.

The positioning means includes the guide rollers 21 to 24, the pressing roller 25 and the guide members 27,
And an air cylinder that moves 28 and 31,
The lower guide rollers 21 and 22 are moved to predetermined positions, and the upper guide rollers 23 and 24 and the pressing roller 25 are brought into contact with the object W to be inspected, so that the object W to be inspected is positioned with respect to the reference plate 20. To be done.

The shape sensor is, as shown in FIG. 3, a roundness sensor 33, a squareness sensor 34, an outer peripheral chipping sensor 35,
The end surface unevenness sensor 36 is provided, and the measurement data from each sensor is output to the control unit.

Roundness sensor 33 and squareness sensor 34
A contact type displacement sensor is used for the upper guide body 28.
It is attached to a movable guide body 37 that is different from the above, and eliminates the influence of vibration of the rotating support rollers 21 to 24. Then, the roundness sensor 33 uses the lower guide roller 2
1, 22 are arranged so as to come into contact with the circumference of the object W to be inspected, and the squareness sensor 34 is arranged so as to come into contact with the circumference close to the front end face.

An eddy current type non-contact sensor is used as the outer peripheral chipping sensor 35 and the end surface unevenness sensor 36, and both are attached to the front guide body 31.

The reversing means 10 is provided for changing the widthwise direction of the object W to be measured because the deformation of the object W is often different from each other and it is necessary to measure both sides. Then, it comprises a case 40 for accommodating an object to be inspected, the side surface of which is open on one side, and a rotary cylinder 41 for reversing the case 40 by 180 degrees.

The rotary cylinder 41 is fixed to the main body of the apparatus, and the case 40 is attached to the rod 42 thereof.
A roller 43 is attached to the rod 42 so as to be rotatable with respect to the apparatus main body. And the case 40
A notch 44 extending from the opening side to the other side is formed on the upper and lower surfaces.

The supply means 13 includes a guide path 50 for guiding the introduced inspection object W to the first shape inspection machine A, and an extrusion cylinder 52 for extruding the inspection object W from the guide path outlet 51 onto the reference plate 20. , A stop cylinder 53 for temporarily holding the inspection object W in front of the guide path outlet 51.
The guideway 50 is inclined downward toward the exit 51,
The inspection object W slides down due to gravity.

The sorting means 11 includes a non-defective product discharge path 61 communicating with the non-defective product outlet 60 and an open / close gate 62 for switching the discharge direction.
It has and. The non-defective product discharge path 61 is a slope parallel to the reference plate 20, and an opening is formed below the slope to serve as a defective product delivery port 63. Open / close gate 6
2 is rotatably supported around a shaft 64 so as to open and close the defective product dispensing opening 63, and is opened and closed by an air cylinder.

The conveying means 12 includes a moving body 71 having four push rods 70 for pushing the object W to be inspected, a feeding portion for moving the moving body 71 in the left and right directions, and a vertical moving portion for vertically moving the push rod 70. The feed unit and the vertical movement unit are provided with an air cylinder.

The moving body 71 is arranged above the reference plate 20, and the push rod 70 is suspended from the moving body 71. When the push rods 70 descend, the first shape inspecting machine A, the first shape inspecting machine A to the case 40, the case 40 to the second shape inspecting machine B, and the second shape inspecting machine B when descending. To the non-defective product discharge path 61. Further, in FIG. 1, the second and third push rods 70 from the left are inserted into the notches 44 of the case 40 and are movable left and right. The transport means 1
2 is depicted above the reference plate 20 in FIG. 1, in fact are positioned perpendicular to the paper surface.

The control unit includes a microcomputer,
The function of pushing out, reversing, and transporting the object W to be inspected by operating the air cylinder at regular intervals, and 1 on the reference plate 20.
The function of measuring the rotating inspection object W and the output value of the detection signal from each sensor are compared with the output value when there is no defect, and it is judged whether or not the variation is within the allowable range, ，
It has a function of determining a defect.

In addition, the device body is provided with an inspected object W to be inspected.
Are provided with a counter for displaying the total number and the number of passed inspections, a printer for displaying and recording measurement data, and a recorder, which are operated by an output signal from the control unit.

In the above structure, the object W to be inspected is guided to the guide path 5
When put into 0, the inspection object W slides down due to the gravity due to the inclination and is stopped by the stop cylinder 53. Then, the stop cylinder 53 intermittently repeats forward and backward movements, and is sequentially fed to the push-out cylinder 52 one by one to the first shape inspection machine A.
Send to

In the first shape inspection machine A, each guide member 27,
When the objects 28 to be inspected W are sent onto the reference plate 20 while the parts 28 and 31 are fully opened, first, the lower guide roller 2
1, 22 are accepted. Then, the lower guide body 27 rises to push up the inspection object W, and further the front guide body 31.
Moves forward, and the upper guide body 28 descends along the reference plate 20.

The lower side of the object W to be inspected is the lower guide rollers 21 and 22, and the upper side is the upper guide rollers 23 and 24.
As a result, the front side is supported by the pressing roller 25, respectively, and the inspection object W is positioned so that the center of the inspection object W fits within the center of the reference plate 20.

When the object W to be inspected is positioned on the reference plate 20, the guide body 37 descends so that the roundness sensor 33 and the squareness sensor 34 come into contact with the object W to be inspected. Further, the end surface unevenness sensor 36 and the outer peripheral chipping sensor 35 advance at the same time as the front guide body 31 advances and stop at a predetermined position.

When each sensor is positioned with respect to the inspection object W, the motor 26 is driven, one upper guide roller 23 is rotated, and the inspection object W is rotated on the reference plate 20. Then, the outer peripheral surface is scanned by the squareness sensor 34 and the roundness sensor 33, and the end surface portion is scanned by the end surface unevenness sensor 36 and the outer peripheral chipping sensor 37.

When the rotation sensor detects that the inspection object W has made one rotation, measurement as shown in FIG. 4 or FIG.
The result is obtained, and the control unit compares the output value of the detection signal from each sensor with the reference value when there is no defect, and judges whether or not the variation (deviation) is within the allowable range. , Determine the defect.

When the inspection is completed, each guide body 27, 2
8 and 31 are fully opened, the positioning of the object W to be inspected is released, and the object W to be inspected is supported only by the lower guide rollers 22 and 23.

Next, the push rod 70 descends and is moved to the right in FIG. Then, the object W to be inspected on the reference plate 20 is moved to the case 4 by the push rod 70 inserted inside.
0 through the case 40 through the opening of the case 40
It is housed in 0. Here, the push rod 70 moves up, moves to the left, and returns to the original position.

Then, when the rotary cylinder 41 rotates 180 degrees, the case 40 is inverted and the opening faces from the first shape inspection machine A to the second shape inspection machine B. The inverted inspection object W is inserted into the notch 44 of the case 40 when the push rod 70 descending again is inserted into the case 4
It is extruded from 0 and conveyed onto the reference plate 20 of the second shape inspection machine B.

Also in the second shape inspection machine B, the inspection object W
Is positioned and the surface opposite to the previous one is similarly inspected. Based on the measurement results of both surfaces by the first and second shape inspecting machines A and B, the control unit determines the quality of the inspected object W.

When the object W to be inspected is judged to be a non-defective product, the opening / closing gate 62 remains in the state in which the defective product delivery port 63 is closed, and the object W to be inspected is pushed by the push rod 70 to the second shape inspection machine B.
Is sent to the non-defective product discharge path 61. The inspected object W rolls along the non-defective product discharge path 61 and is sent out from the non-defective product outlet 60 to the next step.

On the other hand, when the object W to be inspected is determined to be a defective product, the opening / closing gate 62 is rotated to cause the defective product dispensing port 63.
open. Then, the inspection object W is sent from the second shape inspection machine B to the non-defective product discharge path 61 by the push rod 70, guided to the defective product delivery port 63, and stored in the defective product storage container or the like.

When the object W to be inspected is sent from the second shape inspection machine B, the next object W to be inspected is simultaneously supplied to the first shape inspection machine A by the pushing cylinder 52.

By repeating such an operation, the object W to be inspected is supplied one by one each time the carrying means 12 intermittently repeats the reciprocating operation, and the perpendicularity of the object W to be inspected is automatically changed.
The shape abnormality of the end face is continuously inspected.

As described above, since the object to be inspected is reliably positioned on the reference plate by using the supporting roller, it is rotated.
An accurate value can be measured by the shape sensor without causing the object to be inspected to slightly move during the inspection time.

Therefore, only by supplying the object to be inspected,
After that, shape defects and the like are automatically inspected and sorted into good products and defective products, so that labor is not required unlike the conventional case. Therefore, the inspection variation is eliminated, the quality of the object to be inspected is stabilized, and continuous inspection is possible, and the inspection efficiency is improved.

The specifications of the shape inspection apparatus of this embodiment will be described below. The size of the object W to be inspected is 60 mm in diameter.
~ 86 mm, width 30-50 mm. Tact time is 12 pieces / minute. The detectability of the shape sensor is 0.1 mm or more deformation detection for squareness and roundness, 0.3 mm or more deformation detection for end face irregularities, and 0.5 mm or more deformation detection for peripheral defect.

It should be noted that the present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention.

The driving of the supporting roller is not limited to one, but may be plural. Further, by changing the moving distance of the support roller, it can be applied to product inspection of many kinds.

In the present embodiment, the next object W to be inspected is supplied after the inspection of one object W to be inspected is completed.
Inspected object W after reversing operation so that two pieces can be inspected at the same time
When the sheet is conveyed to the second shape inspection machine B, the next object W to be inspected may be supplied to the first shape inspection machine A. This can further improve the inspection efficiency.

The shape inspection apparatus of this embodiment is a combination of an inverting means, a conveying means, and two shape inspecting machines. As the inverting means, the object W to be inspected is grasped and inverted on the spot. By doing so, it is possible to provide an inspection apparatus using only one shape inspection machine.

[0057]

As is apparent from the above description, according to claims 1 and 2 of the present invention, the object to be inspected is rotated by surely positioning the object to be inspected on the reference plate by using the supporting roller. Also, the object to be inspected does not slightly move during the inspection, an accurate value can be measured by the shape sensor, the inspection accuracy is improved, and the reliability of the inspection can be increased.

In particular, according to the invention of claim 1, by simply supplying the object to be inspected, shape defects and the like are automatically inspected after that, and the product is sorted into a good product and a defective product. There is no need. Therefore, the inspection variation is eliminated, the quality of the object to be inspected is stabilized, and continuous inspection is possible, and the inspection efficiency is improved. Also, the claims
According to the invention of 2, the object to be inspected for sliding down the reference plate
Supports the body from below by supporting rollers that make point contact
Therefore, compared with the case of supporting by a supporting roller that makes surface contact
The difference in squareness is remarkable and accurate measurement is possible.
Improves the inspection accuracy.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a shape inspection apparatus showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an inspection machine.

[Fig. 3] Layout plan of the shape sensor of the inspection machine

FIG. 4 is a diagram showing an example of measurement results of non-defective products.

FIG. 5 is a diagram showing an example of measurement results of defective products.

FIG. 6 is a perspective view showing a state of a conventional hand inspection.

FIG. 7 is a diagram illustrating a defect in a bearing ring.

[Explanation of symbols]

 10 Reversing Means 11 Sorting Means 12 Conveying Means 13 Supplying Means 20 Reference Plates 21, 22 Lower Guide Rollers 23, 24 Upper Guide Rollers 25 Pressing Rollers 26 Motors 33 Roundness Sensors 34 Squareness Sensors 35 Outer Perimeter Sensors 36 End Face Irregularity Sensors 40 Case 41 Rotary cylinder 50 Guide path 52 Extrusion cylinder 61 Good product discharge path 62 Open / close gate 63 Defective product ejection port 70 Push rod 71 Moving body A, B Shape inspection machine W Inspected object

Claims (2)

(57) [Scope of utility model registration request] 1. A reference plate on which a circular object to be inspected is placed, a plurality of support rollers which can be brought into contact with and separated from the outer peripheral surface of the object to be inspected, and a positioning means for moving the support rollers to position the object to be inspected. , Two sets of shape inspecting machines each having a drive means for rotationally driving at least one of the support rollers, and a shape sensor for measuring the outer shape of the inspected object rotating on the reference plate; The inspecting unit is provided with a reversing unit for reversing by 180 degrees, a selecting unit for separating the inspected object into a non-defective item and a defective item according to the measurement result, and a conveying unit for intermittently conveying the inspected item in one direction. A shape inspection apparatus for a circular object, characterized in that a shape inspection machine, a reversing means, a shape inspection machine, and a sorting means are juxtaposed in order from the upstream side in the conveying direction. 2. An inclined reference plate on which a circular inspection object is placed, a plurality of support rollers that can be brought into contact with and separated from the outer peripheral surface of the inspection object, and the support rollers are moved to move the inspection object. and positioning means for positioning a position on the upper side of the support rollers
At least comprising a drive means for one of the support rollers is driven to rotate, and a profile sensor for measuring the external shape of the inspection object which rotates at the reference plate, to position on the lower side of the support rollers
The shape inspection device for a circular object, wherein the supporting roller has a shape that makes point contact with the object to be inspected.