JP2008032674A - Quality inspection method for rolling device parts and quality inspection device for rolling device parts - Google Patents

Abstract

The present invention provides a rolling device component quality inspection method and a rolling device component quality inspection device capable of simply and quickly inspecting whether there is an abnormality in the quality of the rolling device component.
A rolling device or a rolling device component to be inspected is arranged in an AC magnetic field generated by applying an AC voltage to an exciting coil 32 of an electromagnetic induction sensor 30, and accompanying a change in magnetic flux density of the AC magnetic field. It is inspected from the change of the induced electromotive force generated in the induction coil 33 whether or not the quality of the rolling device parts is abnormal.
[Selection] Figure 2

Description

  The present invention relates to rolling device parts (for example, bearing rings, cages, screw shafts, nuts, guide rails, sliders, rolling elements, etc.) constituting rolling devices such as rolling bearings, ball screws, and linear motion guide bearing devices. The present invention relates to a method for inspecting whether there is an abnormality in quality and a quality inspection device for rolling device parts.

  Rolling device parts such as bearing rings, screw shafts, sliders, and rolling elements are made of a metal material such as alloy steel, and cracks and surface defects are likely to occur due to distortion generated by heat treatment. In addition, cracks are likely to occur inside the rolling device parts by applying a load or generating frictional heat during processing after heat treatment. For this reason, when assembling rolling devices such as rolling bearings, ball screws, and linear motion guide bearing devices, quality inspections are conducted to determine whether there are internal defects such as cracks and surface defects such as surface defects on the rolling device parts. Is going.

For example, as a method of inspecting a rolling bearing raceway ring for internal defects such as cracks and surface defects such as surface flaws, an ultrasonic flaw detection probe is placed opposite the raceway surface of the raceway ring. There is known a method of performing ultrasonic flaw detection on the entire cross-section of the raceway by moving the ultrasonic flaw detection probe in the axial direction of the raceway while rotating (see Patent Documents 1 and 2).
JP-A-11-337530 JP 2000-314427 A

  However, in the method disclosed in Patent Document 1 or Patent Document 2, it is necessary to rotate the raceway ring and move the ultrasonic flaw detection probe in the axial direction of the raceway ring. In addition, since it is necessary to place an object to be measured in an ultrasonic transmission medium such as a liquid or to apply the ultrasonic transmission medium to the surface of the raceway, a process such as cleaning is required, which is costly. There is also a problem.

  The present invention has been made paying attention to the above-mentioned problems, and its purpose is the quality of rolling device parts that can easily and quickly inspect whether or not the quality of rolling device parts is abnormal. An object is to provide an inspection method and a quality inspection device for rolling device parts.

In order to achieve the above object, a rolling device part quality inspection method according to the invention of claim 1 is characterized in that a rolling device part or a rolling device to be inspected is arranged in an alternating magnetic field, and the magnetic flux of the alternating magnetic field is It is characterized by inspecting whether or not there is an abnormality in the quality of the rolling device component from the change in density.
According to a second aspect of the present invention, there is provided a rolling device part quality inspection method in which a rolling device part or a rolling device to be inspected is disposed in an alternating magnetic field generated by an alternating voltage applied to an exciting coil, When inspecting whether there is an abnormality in the quality of the rolling device parts from the change in the magnetic flux density, an induction coil is disposed in the AC magnetic field, and the change in the induced electromotive force generated in the induction coil is performed. It is characterized by inspecting whether or not the quality of moving parts is abnormal.

The quality inspection device for rolling device parts according to the invention of claim 3 is a device for inspecting whether or not the quality of the rolling device parts is abnormal, and includes an exciting coil and an alternating current supplied to the exciting coil. It is characterized by comprising impedance change detecting means for detecting a change in current impedance.
A rolling device part quality inspection apparatus according to a fourth aspect of the invention is an apparatus for inspecting whether or not the quality of a rolling device part is abnormal, and includes an exciting coil and an alternating current applied to the exciting coil. It is characterized by comprising an induction coil arranged in an alternating magnetic field generated by voltage and an inductance change detecting means for detecting an inductance change of the induction coil.

The quality inspection device for rolling device parts according to the invention of claim 5 is the quality inspection device for rolling device parts according to claim 4, wherein the excitation coil and the induction coil are housed in an integral casing. It is characterized by.
The rolling device part quality inspection method according to the invention of claim 6 is the rolling device component quality inspection method according to claim 2, as a sensor for detecting defects generated in the manufacturing process of the rolling device component. A plurality of electromagnetic induction sensors composed of an excitation coil and an induction coil are used.

The quality inspection device for rolling device parts according to the invention of claim 7 compares the induced electromotive force generated in the induction coil with a threshold value in the quality inspection device for rolling device parts according to claim 4 or 5, A comparison / determination unit that determines that there is a defect when the induced electromotive force is greater than a threshold value and a recording device that records a determination result of the comparison / determination unit on a recording medium are provided.
The quality inspection device for rolling device parts according to the invention of claim 8 is the quality inspection device for rolling device parts according to claim 7, further comprising a storage device for storing the determination result of the comparison determination means. And

According to a ninth aspect of the present invention, there is provided a quality inspection method for rolling device parts, wherein the inspection method according to the first, second, or sixth aspect is a method for inspecting for the presence or absence of defects.
The quality inspection method for a rolling device part according to the invention of claim 10 is the rolling device part quality inspection method according to claim 9, wherein the rolling device part is a bearing ring of a rolling bearing, The area of the defect present in the test volume having a roughness of the surface portion to be the test surface of 0.4 μmRa or less and including all of the cross section including the rotation axis of the raceway and parallel to the rotation axis It is characterized in that it is managed so that the square root length is 0.2 mm or less.

  The quality inspection method for a rolling device part according to the invention of claim 11 is the rolling device part quality inspection method according to claim 9, wherein the rolling device part is a bearing ring of a rolling bearing, The length of the square root of the area of defects existing in the test volume from the test surface to a depth corresponding to 2% of the diameter of the rolling element. It is characterized by managing so that the thickness is 0.2 mm or less.

The quality inspection method for rolling device parts according to the invention of claim 12 is that the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting the presence or absence of mixing of different materials. Features.
A quality inspection method for rolling device parts according to the invention of claim 13 is that the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting the presence or absence of surface fatigue. Features.

The quality inspection method for rolling device parts according to the invention of claim 14 is a method for inspecting the presence or absence of weld peeling of the inspection method according to any one of claims 1, 2, 6, 9 to 11. It is characterized by.
A rolling device part quality inspection method according to a fifteenth aspect of the invention is characterized in that the inspection method according to any one of the first, second, sixth, and ninth to eleventh aspects is a method for inspecting surface hardness. And

The quality inspection method for rolling device parts according to the invention of claim 16 is characterized in that the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method of inspecting the quenching depth. And
The quality inspection method for rolling device parts according to the invention of claim 17 is that the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting a change in metal structure. Features.

  According to the rolling device component quality inspection method and the rolling device component quality inspection device according to the present invention, it is not necessary to use an ultrasonic transmission medium as in the case of an ultrasonic flaw detection probe. It is possible to easily and quickly inspect whether there is an abnormality in quality.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a quality inspection device for rolling device parts according to a first embodiment of the present invention. The quality inspection device for rolling device parts shown in the figure is an excitation coil 21, an AC power supply 22 for supplying an AC current to the excitation coil 21, and an impedance of an AC current supplied from the AC power supply 22 to the excitation coil 21. The impedance change detection circuit 23 for detecting the change and the impedance change detected by the impedance change detection circuit 23 are compared with a preset threshold value. When the detected value of the impedance change detection circuit 23 is larger than the threshold value, the device under test (Rolling device or rolling device component) 26 is provided with a comparison / determination circuit 24 for determining that there is a defect such as surface flaws, and a storage device 27 for storing the determination result of the comparison / determination circuit 24. The determination result of the circuit 24 is supplied to a display 25 such as a CRT, and the determination result of the comparison determination circuit 24 is used as a recording medium such as recording paper. And it is supplied to the recording device 28 such as a printer for recording on.

  As a procedure for inspecting whether or not a rolling device part such as a bearing ring has a defect such as a surface flaw using the thus configured rolling device part quality inspection device, the rolling device to be subjected to quality inspection An exciting coil 21 is disposed above the component or rolling device, and an alternating current is supplied from the AC power source 22 to the exciting coil 21. Then, an AC magnetic field is generated by the AC current supplied from the AC power supply 22 to the exciting coil 21. At this time, if there is a defect such as a surface defect in the rolling device part, the magnetic flux density of the alternating magnetic field changes, and the impedance of the alternating current supplied to the exciting coil 21 also changes according to the size of the defect. Therefore, the impedance change of the alternating current supplied to the exciting coil 21 is detected by the impedance change detection circuit 23, and the impedance change detected by the impedance change detection circuit 23 is compared with the threshold value by the comparison determination circuit 24, so that the surface flaw etc. It is possible to inspect whether or not there are defects in the rolling device parts. This eliminates the need to use an ultrasonic transmission medium as in the case of an ultrasonic flaw detection probe as a probe for flaw detection, so that the quality of rolling device parts (for example, presence of defects, presence of foreign materials, presence of surface fatigue) It is possible to easily and quickly inspect whether there is an abnormality in the presence or absence of weld peeling, surface hardness, quenching depth, and change in metal structure. In addition, since it is not necessary to clean the object to be measured after the inspection, a cleaning process after the inspection is unnecessary, and the inspection cost can be reduced.

  Next, FIG. 2 shows a schematic configuration of a rolling device parts quality inspection device according to a second embodiment of the present invention. The quality inspection device for rolling device parts shown in the figure includes an AC power supply 31 that outputs an AC current, an excitation coil 32 that generates an AC magnetic field by the AC current output from the AC power supply 31, and the excitation coil 32. An induction coil 33 provided in an integral casing, an inductance change detection circuit 34 for detecting an inductance change of the induction coil 33, and an inductance change detected by the inductance change detection circuit 34 are compared with a preset threshold value. The comparison determination circuit 35 that determines that the object to be measured (rolling device or rolling device component) 37 has a defect such as a surface flaw when the detected value of the inductance change detection circuit 34 is larger than the threshold value, and this comparison determination And a storage device 38 for storing the determination result of the circuit 35, and the determination result of the comparison determination circuit 35 is a display 36 such as a CRT. It is supplied, and is supplied to the recording device 39 such as a printer for recording the determination result of the comparing and determining circuit 35 to a recording medium such as recording paper. The induction coil 33 is wound coaxially with the excitation coil 32 with a part in contact with the excitation coil 32. The excitation coil 32 and the induction coil 33 constitute an electromagnetic induction sensor 30 that detects internal defects such as cracks by an electromagnetic induction method.

  As a procedure for inspecting whether or not a rolling device part such as a race ring has a defect such as a crack using the thus configured rolling device part quality inspection device, excitation is performed above the rolling device part. The coil 32 is disposed, and an alternating current is supplied from the alternating current power source 31 to the exciting coil 32. If it does so, an alternating current magnetic field will generate | occur | produce by the alternating current supplied to the exciting coil 32, and the magnetic flux density of an alternating current magnetic field will change according to the magnitude | size of a defect at this time, when defects, such as a crack, exist in rolling device components.

  In addition, when an alternating magnetic field is generated by the alternating current supplied from the alternating current power supply 31 to the exciting coil 32, an induced electromotive force is generated in the induction coil 33. At this time, since the induced electromotive force generated in the induction coil 33 changes according to the magnetic flux density of the AC magnetic field, the inductance change of the induction coil 33 is detected by the inductance change detection circuit 34, and the inductance detected by the inductance change detection circuit 34 is detected. By comparing the change and the threshold by the comparison / determination circuit 35, it is possible to inspect whether or not a defect such as a surface defect exists in the rolling device component. This eliminates the need to use an ultrasonic transmission medium as in the case of an ultrasonic flaw detection probe as a probe for flaw detection, so that the quality of rolling device parts (for example, presence of defects, presence of foreign materials, presence of surface fatigue) It is possible to easily and quickly inspect whether there is an abnormality in the presence or absence of weld peeling, surface hardness, quenching depth, and change in metal structure. In addition, since it is not necessary to clean the object to be measured after the inspection, a cleaning process after the inspection is unnecessary, and the inspection cost can be reduced.

  Next, as an internal defect detection method for rolling bearing parts, an example of an internal defect detection apparatus to which the rolling device part quality inspection apparatus according to the second embodiment is applied is shown in FIG. An internal defect detection apparatus 10A shown in the figure includes a turntable 11 on which a rolling bearing component as a measurement object is assembled as a single component or a rolling bearing, or placed in a semi-assembled state, and above the turntable 11. The electromagnetic induction sensor 30 arranged, the sensor swing mechanism 13 that swings the electromagnetic induction sensor 30 about the X axis (in the direction of the arrow θx in the figure), and the electromagnetic induction sensor 30 via the sensor swing mechanism 13. And a sensor positioning mechanism 16 for positioning the sensor by moving the electromagnetic induction sensor 30 in the X-axis direction and the Y-axis direction in the figure, and the turntable 11. Can be moved in the X-axis direction in the figure by a positioning mechanism 15 for rolling bearing parts.

  The electromagnetic induction sensor 30 places an object to be measured in an AC magnetic field generated by an AC voltage applied to an excitation coil of an electromagnetic induction flaw detection probe, and detects an electromotive force generated in the induction coil of the electromagnetic induction flaw detection probe. As shown in FIG. 4, an induction coil 33 and an excitation coil 32 that is partly in contact with the induction coil 33 and is wound coaxially with the induction coil 33 are housed in an integral housing. The induction coil 33 is connected to a detection circuit (not shown) that detects a change in the alternating magnetic field generated by excitation of the excitation coil 32 from the induced electromotive force generated in the induction coil 33.

FIG. 3 shows the case where the rolling element held on the turntable 11 with the outer ring of the rolling bearing part is held in a semi-assembled state, and the inner ring and the outer ring can be separated in the assembled state. The reference symbol “a” indicates an outer ring of the cylindrical roller bearing, “b” indicates a cylindrical roller, and “c” indicates a machined cage.
As a procedure for inspecting whether or not there is a casting defect such as a nest inside the punching cage c even when such an internal defect detection device 10A is used, first, as shown in FIG. A cylindrical roller bearing with a machined cage from which (not shown) has been removed is placed on the turntable 11. Next, the turntable 11, the sensor swinging mechanism 13, the sensor lifting mechanism 14, the sensor positioning mechanism 16, and the positioning mechanism 15 of the rolling bearing part that is the object to be measured are driven to remove the electromagnetic induction sensor 30 from the scraper holder c. When an AC voltage is applied to the excitation coil 32 of the electromagnetic induction sensor 30 after approaching the end face, an AC magnetic field 18 as shown in FIG. 5 is generated in the electromagnetic induction sensor 30. At this time, if there is a casting defect such as a nest in the inside of the cage holder c, the induced electromotive force generated in the induction coil 33 also changes due to the change in the magnetic flux density of the AC magnetic field 18 generated in the electromagnetic induction sensor 30. Therefore, by detecting the change in the induced electromotive force generated in the induction coil 33 by the detection circuit connected to the induction coil 33, it is possible to accurately determine whether or not there is a casting defect such as a nest inside the machined cage c. Can be detected.

  Next, FIG. 6 shows another example of the internal defect detection device used in the internal defect detection method for rolling bearing parts. An internal defect detection device 10B shown in the figure includes a turntable 11 on which a rolling bearing part as a measurement object is assembled as a single part or a rolling bearing, or placed in a semi-assembled state, and above the turntable 11. The electromagnetic induction sensor 30 arranged, the sensor oscillation mechanism 19 that drives the electromagnetic induction sensor 30 to swing around the Z axis (in the direction of the arrow θz in the figure), and the electromagnetic induction via the sensor oscillation mechanism 19 A sensor elevating mechanism 14 that drives the sensor 30 to move up and down in the Z-axis direction in the figure, and a sensor positioning mechanism 16 that moves the electromagnetic induction sensor 30 in the X-axis direction and the Y-axis direction in the figure to position the sensor are provided. The table 11 is movable in the X-axis direction in the drawing by a positioning mechanism 15 for rolling bearing parts.

  As shown in FIG. 4, the electromagnetic induction sensor 30 includes an induction coil 33 and an excitation coil 32 that is partly in contact with the induction coil 33 and wound coaxially with the induction coil 33. The induction coil 33 is connected to a detection circuit (not shown) that detects a change in the alternating magnetic field generated by excitation of the excitation coil 32 from the induced electromotive force generated in the induction coil 33. By storing the exciting coil and the induction coil in an integral casing, the unit can be miniaturized and workability can be improved, and the defect can be detected by installing it in a narrow space inside the rolling bearing.

  As a procedure for inspecting whether or not there is a casting defect such as a nest in the pillar portion of the punching cage c even when such an internal defect detection device 10B is used, first, as shown in FIG. A cylindrical roller bearing with a machined cage from which (not shown) is removed is placed on the turntable 11. Next, the electromagnetic induction sensor 30 is removed by driving the turntable 11, the sensor swinging mechanism 19, the sensor lifting mechanism 14, the sensor positioning mechanism 16, and the positioning mechanism 15 of the rolling bearing part as the object to be measured. When an AC voltage is applied to the excitation coil 32 of the electromagnetic induction sensor 30 after approaching the column portion, an AC magnetic field 18 as shown in FIG. 5 is generated in the electromagnetic induction sensor 30. At this time, if there is a casting defect such as a nest in the pillar portion of the machined cage c, the induced electromotive force generated in the induction coil 33 by the change in the magnetic flux density of the alternating magnetic field 18 generated in the electromagnetic induction sensor 30 is also generated. Therefore, whether or not there is a casting defect such as a nest in the pillar portion of the machined cage c by detecting a change in the induced electromotive force generated in the induction coil 33 by a detection circuit connected to the induction coil 33. Can be accurately detected.

In the embodiment described above, the cylindrical roller bearing with a machined cage from which the inner ring has been removed is placed on the turntable 11 to inspect whether a casting defect such as a nest is inside the machined cage c. However, as shown in FIG. 7, the machined cage may be placed on the turntable 11 to inspect whether a casting defect such as a nest exists in the machined cage c. .
In the above-described embodiment, the machined cage is illustrated as the rolling bearing part, but the invention is not limited to this. For example, as shown in FIG. 8, the outer ring a may be placed on the turntable 11 as a rolling bearing part, and an internal defect of the outer ring a may be detected by the electromagnetic induction sensor 30. Similarly, the present invention can be applied to detection of internal defects in the inner ring.

The roller bearings that can be separated from the inner ring and the outer ring in the assembled state are not limited to the cylindrical roller bearings of the embodiment, and tapered roller bearings and self-aligning roller bearings can be disassembled and assembled by hand. The present invention can be applied if no damage or the like affecting the performance occurs due to repeated assembly.
Further, in the above-described method for detecting an internal defect of a rolling bearing part, the rolling bearing part can be applied to any of an inner ring, an outer ring, a rolling element, a cage, and a spacer. When detecting an internal defect of a rolling bearing part by an electromagnetic induction sensor, at least a rolling element is arranged between an inner ring and an outer ring of the rolling bearing, or a rolling element and a cage or spacer are arranged, that is, a rolling bearing. It is possible to detect internal defects in the assembled state, or detect internal defects in the state where rolling elements and cages are arranged on the outer peripheral side of the inner ring or the inner peripheral side of the outer ring, that is, the rolling bearing is in a semi-assembled state. It is also possible to do. Rolling bearings composed of rolling bearing parts can also be applied to roller bearings that can be separated when the inner ring and outer ring are assembled, and even when the rolling bearing parts are copper alloy machined cages, Detection capability is obtained.

Next, FIG. 9 shows an inspection method useful for inspecting whether or not there is an internal defect that may induce breakage or the like in the bearing ring of the rolling bearing by using the inspection apparatus shown in FIG. The description will be given with reference.
When inspecting whether or not an internal defect that affects the life of the rolling bearing is present in the raceway ring, first, as shown in FIG. 9, the raceway surface 41a of the raceway ring 41 has a surface roughness of 0.4 μm. Finish polishing until below. Next, a flaw detection inspection is performed on the entire cross section of the track surface 41a using the inspection apparatus shown in FIG. At this time, when the length of the square root of the detected defect area is larger than 0.2 mm, the race ring is excluded as a defective product, and the length of the detected defect square root of 0.2 mm or less is the rolling bearing raceway. By using it as a ring, it becomes difficult to cause breakage or the like in the race, so that a long-life rolling bearing can be obtained.

The track ring 41 may be an inner ring or an outer ring. Further, when the race ring 41 is inspected using the inspection apparatus shown in FIG. 2, as shown in FIG. 10, from the raceway surface 41a, the rolling element diameter Da (small and large diameters when the rolling element is a tapered roller). It is preferable to perform a flaw detection inspection up to a depth corresponding to 2% of a value obtained by dividing the sum of 2 by 2.
In the above-described embodiment, the case where the number of electromagnetic induction sensors 30 including the excitation coil 32 and the induction coil 33 is one is shown. However, a plurality of electromagnetic induction sensors including the excitation coil and the induction coil are used as, for example, the raceway surface of the raceway. By arranging it around, multiple flaw detection inspections can be performed from multiple directions at once.

It is a figure which shows schematic structure of the quality inspection apparatus for rolling device components which concerns on the 1st Embodiment of this invention. It is a figure which shows schematic structure of the quality inspection apparatus for rolling device components which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the internal defect detection apparatus used for the internal defect detection method of rolling bearing components. It is a figure which shows the basic composition of the electromagnetic induction sensor shown by FIG. It is a figure which shows typically the alternating current magnetic field which generate | occur | produces in an electromagnetic induction sensor. It is a figure which shows the other example of the internal defect detection apparatus used for the internal defect detection method of rolling bearing components. It is a figure which shows the state which mounted the punching holder single-piece | unit on the turntable of the internal defect detection apparatus shown by FIG. It is a figure which shows the state which mounted the bearing ring of the rolling bearing on the turntable of the internal defect detection apparatus shown by FIG. It is sectional drawing which shows the bearing ring of a rolling bearing. It is explanatory drawing for demonstrating the flaw detection depth in the case of carrying out a flaw detection test | inspection of the track surface of a bearing ring.

Explanation of symbols

22, 31 AC power supply 23 Impedance change detection circuit 24, 35 Comparison determination circuit 25, 36 Display device 26, 37 Device to be measured 27, 38 Storage device 28, 39 Recording device 30 Electromagnetic induction sensor 32 Excitation coil 33 Induction coil 34 Inductance change Detection circuit 11 Turntable

Claims (17)

  A rolling device part or a rolling device to be inspected is arranged in an alternating magnetic field, and whether or not the quality of the rolling device part is abnormal is inspected from a change in magnetic flux density of the alternating magnetic field. Quality inspection method for rolling device parts.   The rolling device part to be inspected or the rolling device is placed in an AC magnetic field generated by an AC voltage applied to the exciting coil, and the quality of the rolling device part is abnormal due to the change in the magnetic flux density of the AC magnetic field. When inspecting whether or not, an induction coil is arranged in the AC magnetic field, and it is inspected whether there is an abnormality in the quality of the rolling device component from a change in the induced electromotive force generated in the induction coil. A quality inspection method for rolling device parts.   An apparatus for inspecting whether or not the quality of rolling device parts is abnormal, comprising an exciting coil and an impedance change detecting means for detecting an impedance change of an alternating current supplied to the exciting coil. A quality inspection device for rolling device parts.   An apparatus for inspecting whether or not the quality of a rolling device part is abnormal, comprising an exciting coil, an induction coil arranged in an alternating magnetic field generated by an alternating voltage applied to the exciting coil, and the induction A quality inspection device for a rolling device component, comprising: an inductance change detecting means for detecting an inductance change of the coil.   5. The quality inspection device for rolling device parts according to claim 4, wherein the exciting coil and the induction coil are housed in an integral casing.   3. A quality inspection of a rolling device part according to claim 2, wherein a plurality of electromagnetic induction sensors comprising an exciting coil and an induction coil are used as sensors for detecting defects generated in the manufacturing process of the rolling device part. Method.   6. The quality determination device for rolling device parts according to claim 4, wherein the induced electromotive force generated in the induction coil is compared with a threshold value, and when the induced electromotive force is larger than the threshold value, the comparison determination unit determines that there is a defect. And a quality inspection device for rolling device parts, comprising: a recording device that records the determination result of the comparison determination means on a recording medium.   The quality inspection device for rolling device parts according to claim 7, further comprising a storage device for storing a determination result of the comparison and determination means.   A quality inspection method for rolling device parts, wherein the inspection method according to claim 1, 2 or 6 is a method for inspecting for the presence or absence of defects.   The rolling device component is a bearing ring of a rolling bearing, and the roughness of a surface portion to be a test surface of the bearing ring is 0.4 μmRa or less, and includes the rotation axis of the bearing ring and is parallel to the rotation axis. 10. The quality inspection of a rolling device part according to claim 9, wherein the length of the square root of the area of the defect existing in the test volume including all of the cross sections in various directions is controlled to be 0.2 mm or less. Method.   The rolling device component is a bearing ring of a rolling bearing, and the roughness of the surface portion to be a test surface of the track ring is 0.4 μmRa or less, and corresponds to 2% of the rolling element diameter from the test surface. 10. The quality inspection method for a rolling device part according to claim 9, wherein a length obtained by square root of an area of a defect existing in a test volume up to a depth to be controlled is 0.2 mm or less.   A method for inspecting the quality of rolling device parts, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting for the presence or absence of foreign materials.   A method for inspecting the quality of rolling device parts, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting the presence or absence of surface fatigue.   A method for inspecting the quality of rolling device parts, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting for the presence or absence of weld peeling.   A quality inspection method for rolling device parts, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting surface hardness.   A method for inspecting a quality of a rolling device part, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting a quenching depth.   A method for inspecting a quality of a rolling device part, wherein the inspection method according to any one of claims 1, 2, 6, 9 to 11 is a method for inspecting a change in a metal structure.

Images