CN113984885A - Bearing ring full-surface eddy current detection equipment - Google Patents
Bearing ring full-surface eddy current detection equipment Download PDFInfo
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- CN113984885A CN113984885A CN202111207171.8A CN202111207171A CN113984885A CN 113984885 A CN113984885 A CN 113984885A CN 202111207171 A CN202111207171 A CN 202111207171A CN 113984885 A CN113984885 A CN 113984885A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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Abstract
The invention belongs to the technical field of nondestructive inspection equipment, and relates to bearing ring full-surface eddy current detection equipment. The flaw detection unit of the bearing ring full-surface eddy current detection equipment is provided with a limiting and centering supporting mechanism arranged at a measuring station; a plurality of centering supporting elements are arranged on a turntable of the limiting and centering supporting mechanism; each centering support element has two support faces: a first supporting surface and a second supporting surface; an automatic switching unit is arranged in cooperation with the centering support element; the automatic switching unit is provided with a plurality of supporting elements which are uniformly distributed along the circumference, and the plurality of supporting elements and the plurality of centering supporting elements are arranged in a staggered manner; the probe for carrying out flaw detection on the bearing ring is arranged above the measuring station; the probe is provided with an upper detection surface, a lower detection surface and a vertical detection surface which are arranged in parallel. The invention realizes the detection of the whole surface of the bearing ring.
Description
Technical Field
The invention belongs to the technical field of nondestructive inspection equipment, and particularly relates to bearing ring full-surface eddy current detection equipment.
Background
The bearing ring is a main component of the bearing, in the production process, because impurities exist in the material, or the grinding is uneven in the processing process, cracks and grinding burns can be generated on the surface of the bearing, the defects are small in size, are very difficult to manually inspect and often overlook, and cause great hidden dangers to the product quality of the bearing, so that all bearing manufacturers actively take measures to solve the problem. The common methods comprise magnetic powder inspection, acid cleaning inspection and the like, wherein the magnetic powder inspection is used for detecting surface cracks, the acid cleaning inspection is used for detecting grinding burns, the detection results of the magnetic powder inspection and the acid cleaning inspection both depend on the working experience of operators, and special reagents are required as detection conditions, so that the physical health of the operators is not facilitated. The eddy current flaw detection is a nondestructive detection technology which is developed rapidly in recent years, is very sensitive to surface cracks and burns, has the advantages of non-contact detection, high detection sensitivity, good frequency response characteristic and the like, and is suitable for detecting near-surface cracks and grinding burns of bearing rings. At present, the eddy current inspection technology is not widely applied to the bearing industry, common eddy current inspection equipment is mostly used for roller inspection, a bearing ring is complex in structure and has more than ten surfaces, the wall thickness is thin, and few full-automatic eddy current inspection equipment for full-surface inspection of the bearing ring is available.
Disclosure of Invention
The invention aims to provide a bearing ring full-surface eddy current detection device and a detection method, which can solve the technical problems that in the prior art, when the bearing ring full-surface eddy current detection device is used for eddy current detection of a bearing ring, the structure of the bearing ring is complex, the bearing ring has more than ten surfaces, the wall thickness is thin, and automatic detection is difficult to realize.
In order to achieve the purpose, the invention adopts the following technical scheme:
the full-surface eddy current detection equipment for the bearing ring is provided with a feeding platform, a demagnetization unit and a flaw detection unit; the method is characterized in that: the flaw detection unit is provided with a limiting and centering supporting mechanism arranged at a measuring station; the limiting and centering support mechanism is provided with a turntable; the turntable is provided with a centering supporting element; the number of the centering support elements is at least three, and the centering support elements are uniformly distributed along the circumference; the centering support elements are uniformly distributed along the circumference and support and limit the bearing ring under the condition of ensuring the concentricity of the centering support elements and the bearing ring; each of said centering and supporting elements has two supporting surfaces: a first supporting surface and a second supporting surface; the second supporting surface is arranged corresponding to the bearing ring with an annular flange on the lower end surface of the inner surface or the outer surface; the second supporting surface is used for supporting part of the annular surface of the lower end surface of the bearing ring by one side with the annular flange surface; the first supporting surface supports a part of annular surface of the lower end surface of the bearing ring from one side without the annular flange surface; the part of the annular surface of the lower end surface of the bearing ring, which is matched with the first supporting surface and the second supporting surface, is less than one half of the lower end surface of the bearing ring, so that enough space is reserved for detecting the lower end surface of the bearing ring which is not contacted with the supporting surface; the first supporting surface and the second supporting surface are arranged, so that a space is formed between the detected bearing ring and the turntable, and the space forms a space for detecting the lower end surface of the bearing ring; each centering support element is also provided with a centering datum plane I and a centering datum plane II; the centering reference surface I is matched with the first supporting surface for use, and the centering reference surface II is matched with the second supporting surface for use; when the centering reference surface I and the centering reference surface II are matched with the first supporting surface and the second supporting surface for use, the centering reference surface I or the centering reference surface II is tangent to the outer diameter surface or the inner diameter surface of the corresponding bearing ring;
an automatic switching unit is arranged in cooperation with the centering support element; the automatic switching unit is provided with a plurality of supporting elements which are uniformly distributed along the circumference, and the plurality of supporting elements and the plurality of centering supporting elements are arranged in a staggered manner; a driving mechanism II which enables the supporting element to ascend and descend relative to the rotary table is arranged corresponding to the supporting element; after the plurality of centering support elements support the bearing ring from the inner side or the outer side and complete detection, the automatic switching unit is used for automatically upwards supporting the bearing ring and enabling the bearing ring to be separated from the centering support elements, the centering support elements synchronously move outwards or inwards at equal intervals under the action of the driving mechanism I, the bearing ring descends under the action of the automatic switching unit, and the plurality of centering support elements support the bearing ring from the outer side or the inner side so as to realize automatic switching of the bearing ring from the inner side or the outer side to the outer side or the inner side;
the probe for carrying out flaw detection on the bearing ring is arranged above the measuring station; the probe is provided with an upper detection surface, a lower detection surface and a detection surface which are arranged in parallel, and the detection surface is arranged vertically; the upper detection surface of the probe is provided with a sensor I for detecting the lower end surface of the bearing ring and the lower end surface of the step; the detection surface of the probe is provided with a sensor II for detecting the outer diameter surface or the raceway surface or the inner diameter surface of the bearing ring; the sensors II are arranged in two rows, and the two rows of sensors II are arranged in a staggered manner; the lower detection surface of the probe is provided with a sensor III for detecting the upper end surface of the bearing ring and the upper end surface of the step.
The body of the centering support element is provided with an annular bulge protruding outwards; the annular bulge is two arranged from top to bottom: the annular bulge I and the annular bulge II are formed; the upper end face of the annular protrusion I forms the first supporting surface, and the body part of the centering supporting element at the upper part of the annular protrusion I is used as a centering reference surface I; the upper end face of the annular protrusion II forms the second supporting face, and the outer diameter face of the annular protrusion I serves as a centering reference face II.
The flaw detection unit is connected with the feeding platform through a feeding chain plate and a right-angle steering mechanism; the feeding chain plate is connected with the right-angle steering mechanism, a model identification station is arranged on the feeding chain plate, an industrial camera is used for automatically identifying the model of a product, and an inner ring and an outer ring are distinguished so as to call scanning parameters of different bearing models; the feeding chain plate and the flaw detection unit move the pneumatic claw to grab the bearing ring and place the bearing ring in the flaw detection unit through the X-direction displacement mechanism and the Z-direction lifting mechanism.
The right-angle steering mechanism is provided with an X displacement direction chain plate and a Y displacement direction chain plate, the bearing ring enters the right-angle steering mechanism under the driving of the X displacement direction chain plate, the X displacement direction chain plate is lowered below a plane, and the Y displacement direction chain plate drives the bearing ring to displace in the Y direction and enter the feeding chain plate.
The demagnetization unit is provided with a lifting mechanism and a demagnetization plate, the lifting mechanism drives the bearing ring to be close to the demagnetization plate for demagnetization, and the lifting mechanism drives the bearing ring to return after demagnetization is finished.
And a calibration unit is arranged between the flaw detection unit and the feeding chain plate.
According to the full-surface eddy current detection equipment for the bearing ring, the bearing ring is supported and limited by the arrangement of the centering support element under the condition that the concentricity with the bearing ring is ensured; the centering support element can respectively support part of the annular surface of the lower end surface of the bearing ring from the inner side or the outer side, so that the bearing ring is separated from the rotary table and suspended, flaw detection is carried out on the unsupported position of the lower end surface of the bearing ring through the probe, and the flaw detection and detection of the outer diameter surface or the inner diameter surface, the raceway surface, the flange surface, the step surface, the upper end surface and the lower end surface of the bearing ring are realized at one measuring station under the condition that the bearing ring is not turned over; and through the accurate control of a PLC system, the eddy current detection can be carried out step by step no matter the bearing ring is a simple structure or a complex structure, and the detection of the whole surface of the bearing ring is realized.
Drawings
Fig. 1 is an overall structural view of the present invention.
FIG. 2 is a flow chart of the detection of the present invention.
Fig. 3 is a structural top view of the limit centering support mechanism of the invention.
Fig. 4 is a structural side view of the limit centering support mechanism of the invention.
Fig. 5 is a schematic structural view of the centering support member of the present invention.
Fig. 6 is a first structural view of the centering support member of the present invention when it is supported from the inside and outside of the bearing ring.
Fig. 7 is a second construction of the centering support member of the present invention when it is supported from the inside and outside of the bearing ring.
Fig. 8 is a schematic view of a third construction of the centering support member of the present invention when it is supported from the inside and outside of the bearing ring.
Fig. 9 is a schematic view of the structure of the probe in the present invention.
Fig. 10 is a side view of fig. 9.
Fig. 11 is an enlarged view of a portion of the sensor location of fig. 10.
In the figure: 1. the device comprises a feeding platform, 2, a demagnetization unit, 3, a right-angle steering mechanism, 4, a feeding chain plate, 5, a flaw detection unit, 6, a calibration unit, 7, an OK product channel, 8, an NG product channel, 9, a rotary table, 10, a supporting element, 11, a centering supporting element, 11-1, an annular protrusion I, 11-2, a first supporting surface, 11-3, a centering reference surface I, 11-4, a second supporting surface, 11-5, a centering reference surface II, 11-6, an annular protrusion II, 12, a probe, 12-1, a sensor I, 12-2, a sensor II, 12-3, a sensor III, 13, a mother disc, 14, a male disc, 15, a rotating shaft, 16, a measuring bottom plate, 17, a stepping motor, 18, a linear guide rail, 19 and a bearing ring.
Detailed Description
The invention is described in detail with reference to the accompanying drawings and specific embodiments:
example 1: as shown in fig. 1, the full-surface eddy current testing equipment for the bearing ring is provided with a feeding platform 1, a demagnetization unit 2, a right-angle steering mechanism 3, a feeding chain plate 4 and a flaw detection unit 5; the feeding platform 1 is mechanically connected with the demagnetization unit 2; the demagnetization unit 2 is mechanically connected with the right-angle steering mechanism 3; the feeding chain plate 4 is mechanically connected with the right-angle steering mechanism 3 and is provided with a model identification station; the feeding chain plate 4 and the flaw detection unit 5 move the air claw through an X-direction displacement mechanism and a Z-direction lifting mechanism, and the grabbing bearing ring 19 is placed on the flaw detection unit 5 to realize mechanical connection; the calibration unit 6 is positioned on one side of the flaw detection unit 5, and is mechanically connected with the flaw detection unit 5 by moving the gas claw grabbing bearing ring 19 through the X-direction displacement mechanism and the Z-direction displacement mechanism; with reference to fig. 3 and 4, the flaw detection unit 5 has a limit centering support mechanism arranged at the measurement station; the limiting and centering support mechanism is provided with a turntable 9; three centering supporting elements 11 which are uniformly distributed along the circumference are arranged on the turntable 9; the three centering support elements 11 which are uniformly distributed along the circumference support and limit the bearing ring 19 under the condition of ensuring the concentricity with the bearing ring; as shown in fig. 5, the body of the centering support member 11 has an annular projection projecting outward; the annular bulge is two arranged from top to bottom: the annular bulge I11-1 and the annular bulge II 11-6; the upper end face of the annular protrusion I11-1 forms the first supporting face 11-2, and the body part of the centering supporting element 11 at the upper part of the annular protrusion I11-1 is used as a centering reference face I11-3; the upper end surface of the annular bulge II 11-6 forms the second supporting surface 11-4, and the outer diameter surface of the annular bulge I11-1 serves as a centering reference surface II 11-5; as shown in fig. 6, and referring to fig. 2, 3 and 4, the bearing ring 19 is an outer ring, and the inner surface of the outer ring is provided with an annular rib; when the outer surface of the outer ring is detected, the second supporting surface 11-4 of each centering support element 11 is used for supporting part of the annular surface of the lower end surface of the bearing ring 19 from the inner side, so that a space is formed between the detected bearing ring 19 and the turntable 9, the space forms a space for detecting the outer part of the lower end surface of the bearing ring 19, and the centering reference surface II 11-5 of the centering support element 11 is tangent to the inner diameter surface of the outer ring;
after the outer surface of the outer ring is detected, the quick-change disc male disc 14 is contacted with the master disc 13, and the centering support element 11 loosens the bearing ring 19; the three supporting elements 10 of the automatic switching unit automatically rise under the action of the driving mechanism II, the bearing ring 19 is lifted upwards, the three centering supporting elements 11 synchronously move outwards at equal intervals on the linear guide rail 18 under the driving of the stepping motor 17, and the diameter of a circle formed by the three centering supporting elements 11 is larger than the outer diameter of the bearing ring 19; the bearing ring 19 descends under the action of the three supporting elements 10 to drive the bearing ring 19 to return to a measuring position, the centering supporting elements 11 synchronously move on the linear guide rail 18 at equal intervals under the drive of the stepping motor 17, so that the first supporting surfaces 11-2 of the three centering supporting elements 11 support part of the annular surface of the lower end surface of the bearing ring 19 from the outer side, the centering reference surfaces I11-3 of the three centering supporting elements 11 are tangent to the outer diameter surface of the outer ring, and the bearing ring 19 is clamped; the male disc 14 of the fast-changing disc is separated from the master disc 13, the rotating shaft 15 drives the rotating disc 9, thereby driving the bearing ring 19 to start rotating, and simultaneously the probe 12 moves to the inner surface of the bearing ring 19 to start scanning detection.
A driving mechanism I which is arranged on the turntable 9 corresponding to the centering support element 11 and is used for driving the turntable 9 to move comprises a stepping motor 17, and a linear guide rail 18 which is matched with the centering support element 11 is arranged on the turntable 9.
The automatic switching unit is provided with three supporting elements 10 which are uniformly distributed along the circumference, and the three supporting elements 10 and the plurality of centering supporting elements 11 are arranged in a staggered manner; a driving mechanism II which enables the supporting element 10 to ascend and descend relative to the turntable 9 is arranged corresponding to the supporting element 10;
the mechanism for providing the energy conduction function for the driving mechanism I of the centering support element 11 and the driving mechanism II of the support element 10 can be a quick-change mechanism formed by a mother disc and a male disc of a quick-change tool, and can also adopt conductive slip ring conduction or exchange information such as instructions and data by a wireless module, such as a wifi module; in this embodiment, a master disc 13 of the quick-change tool is arranged on the turntable 9; a male disc 14 corresponding to the master disc 13 is fixed on a measuring bottom plate 16 of the full-surface eddy current testing equipment; in addition, the positions of the male disc and the mother disc of the quick-change tool for providing the gas-electric energy source for the driving mechanism I of the centering support element 11 and the driving mechanism II of the support element 10 can be exchanged. The technical scheme mainly introduces a one-time mounting non-turnover switching device for measuring the inner and outer surfaces of bearing race parts, and for the mechanism for providing energy conduction for the driving mechanism I of the centering supporting element 11 and the driving mechanism II of the supporting element 10, the mechanism is only used in cooperation with the one-time mounting non-turnover switching device, and the description is not repeated here.
As shown in fig. 7, the bearing ring 19 is an inner ring, and the outer surface of the inner ring is provided with an annular rib; when the outer surface of the inner ring is detected, the first supporting surface 11-2 of each centering supporting element 11 supports part of the annular surface of the lower end surface of the bearing ring 19 from the inner side, and a centering reference surface I11-3 of the centering supporting element 11 is tangent to the inner diameter surface of the inner ring; after the detection of the outer surface of the inner ring is finished, the quick-change male disc 14 is in contact with the master disc 13, the three supporting elements 10 of the automatic switching unit complete automatic switching of supporting positions under the action of the driving mechanism II, so that the second supporting surfaces 11-4 of the three centering and supporting elements 11 support the bearing ring 19 from the outer side, the centering reference surfaces II 11-5 of the three centering and supporting elements 11 are tangent to the outer diameter surface of the inner ring, and then the detection is carried out.
As shown in fig. 8, when the outer surface of the bearing ring 19 is inspected, the first supporting surface 11-2 of each centering and supporting element 11 supports a part of the annular surface of the lower end surface of the bearing ring 19 from the inside, so that the bearing ring 19 is spaced from the turntable 9, and the space forms a space for detecting the outer part of the lower end surface of the bearing ring 19, and the centering reference surface i 11-3 of the centering and supporting element 11 is tangential to the inner diameter surface of the bearing ring 19; after the detection of the outer surface of the bearing ring 19 is completed, the quick-change disc male disc 14 is contacted with the master disc 13, and the centering support element 11 loosens the bearing ring 19; the three supporting elements 10 of the automatic switching unit automatically rise under the action of the driving mechanism II, the bearing ring 19 is lifted upwards, and the three centering supporting elements 11 are driven by the stepping motor 17 to synchronously move outwards at equal intervals on the linear guide rail 18; the bearing ring 19 is lowered under the action of the three support elements 10, so that the first support surfaces 11-2 of the three centering support elements 11 support the bearing ring 19 from the outside, a space is formed between the detected bearing ring 19 and the turntable 9, the space forms a space for detecting the inner part of the lower end surface of the bearing ring 19, the centering reference surfaces I11-3 of the three centering support elements 11 are tangent to the outer diameter surface of the bearing ring 19 and clamp the bearing ring 19, then the quick-change disc male disc 14 is separated from the master disc 13, the rotating shaft 15 drives the bearing ring 19 to rotate, and the probe 12 moves to the inner surface of the bearing ring 19 to start scanning detection.
As shown in fig. 9, 10 and 11, the probe 12 of the flaw detection unit 5 is arranged above the measuring station, and the probe 12 has an upper detecting surface, a lower detecting surface and a vertically arranged detecting surface which are arranged in parallel; the upper detection surface of the probe 12 is provided with a sensor I12-1 for detecting the lower end surface of the bearing ring 19 and the lower end surface of the step; the detection surface of the probe 12 is provided with a sensor II 12-2 for detecting the outer diameter surface or the raceway surface or the inner diameter surface of the bearing ring 19; the sensors II 12-2 are arranged in two rows, and the two rows of sensors II 12-2 are arranged in a staggered mode; the lower detection surface of the probe 12 is provided with a sensor III 12-3 for detecting the upper end surface of the bearing ring 19 and the upper end surface of the step; and starting the sensor I12-1 when scanning the lower end face or the lower flange, and starting the sensor II 12-2 when scanning the outer diameter, the inner diameter, the raceway or the step, wherein only one of the sensors II 12-2 is started if the scanning width of the step is less than the height of the sensor II 12-2.
The right-angle steering mechanism 3 is provided with X displacement direction chain plates 11-1 and Y displacement direction chain plates 11-2, the bearing ring 19 enters the right-angle steering mechanism 3 under the driving of the X displacement direction chain plates, the X displacement direction chain plates are lowered below the plane, and the Y displacement direction chain plates drive the bearing ring 19 to displace in the Y direction and enter the feeding chain plates 4.
The demagnetization unit 2 is provided with a lifting mechanism and a demagnetization plate, the lifting mechanism drives the bearing ring 19 to approach the demagnetization plate for demagnetization, and the lifting mechanism drives the bearing ring 19 to return after demagnetization is finished; the structure of the demagnetization unit 2 is mature in the prior art, and is not explained much again.
A calibration unit 6 is arranged between the flaw detection unit 5 and the feeding chain plate 4; the calibration unit 6 has a calibration platform for placing a standard; the calibration platform is provided with three pairs of staggered supporting blocks 10 and centering supporting elements 11, the supporting blocks are fixed structures, and the structure of the centering supporting elements 11 and the centering supporting elements 11 of the flaw detection unit 5 can clamp the bearing ring 19 for positioning the bearing ring 19.
Referring to fig. 2, the operation process of the bearing ring full-surface eddy current testing device is as follows:
a worker puts a bearing ring 19 into the feeding platform 1, the bearing ring 19 enters the demagnetization unit 2 under the driving of a chain plate, the demagnetization unit 2 is provided with a lifting mechanism and a demagnetization plate, the lifting mechanism drives the bearing ring 19 to approach the demagnetization plate for demagnetization, the lifting mechanism drives the bearing ring 19 to return after the demagnetization is finished, and the bearing ring 19 enters the right-angle steering mechanism 3 under the driving of the chain plate;
the right-angle steering mechanism 3 is respectively provided with an X-displacement direction chain plate and a Y-displacement direction chain plate, the bearing ring 19 enters the right-angle steering mechanism 3 under the driving of the X-displacement direction chain plate, the X-displacement direction chain plate is lowered below the plane, and the Y-displacement direction chain plate drives the bearing ring 19 to displace in the Y direction and enter the feeding chain plate 4;
a CCD camera is arranged above the tail end of the feeding chain plate 4, so that the bearing ring 19 is positioned to be convenient for the gas claw to grab the bearing ring 19, and the corresponding measurement path formula is called through matching the external dimension of the bearing ring with the model of the bearing ring; after the model identification is completed, the linear motor drives the lifting mechanism and the gas claw to the position of the bearing ring 19 of the feeding chain plate 4, the lifting mechanism drives the gas claw to grab the bearing ring 19, the linear motor drives the bearing ring 19 to return to the position above the measuring station, and the lifting mechanism drives the bearing ring 19 to descend to the supporting block of the measuring station;
the bearing ring 19 is arranged on a supporting element 10 of the measuring station, and the supporting element 10 can adopt a supporting block; the male quick-change disc 14 is in contact with the master disc 13, and is used for electrifying and ventilating a driving mechanism I of the centering support element 11 and a driving mechanism II of the support element 10 to support and switch the bearing ring 19; the specific supporting mode is as described above with reference to fig. 6 or fig. 7 or fig. 8, then the quick-change male disc 14 is separated from the master disc 13, the rotating shaft 15 drives the rotating disc 9, so as to drive the bearing ring 19 to start to rotate at a slow speed, the runout detection mechanism moves to the surface of the bearing ring 19 to measure the end face runout and radial runout of the bearing ring, and simultaneously the CCD camera installed above the bearing ring 19 scans the laser mark on the end face of the bearing ring 19, and automatically records the measuring result in the system; after the jumping detection and the ring number identification, the jumping detection mechanism is reset, the rotating shaft 15 drives the bearing ring 19 to start accelerating to the rated rotating speed, the probe 12 moves to the end face of the bearing ring 19 to start scanning, the upper end face, the outer diameter and the lower end face are sequentially scanned, the bearing ring with the flanges needs to scan the flanges and the steps, all surfaces of the outer surface of the bearing ring are scanned and covered, the rotation is stopped after the upper end face and the lower end face are started, and the probe 12 returns to the safe position; the specific scanning path is as follows: when the upper end surface is scanned, only the sensor I12-1 is started to execute scanning, the bearing ring 19 continuously rotates at a normal rotating speed, and the probe 12 automatically matches the moving speed; when the outer diameter is scanned, when the width of a scanning area is larger than the height of the matrix probe, only all the 6 sensors II 12-2 in the middle are started to execute scanning, the bearing ring 19 continuously rotates at a normal rotating speed, and the probe 12 automatically matches with the moving speed; when the lower end face is scanned, only the sensor III 12-3 is started to execute scanning, the bearing ring 19 continuously rotates at a normal rotating speed, and the probe 12 automatically matches the moving speed;
after the detection of the outer surface of the bearing ring 19 is finished, the quick-change disc male disc 14 is contacted with the master disc 13, the bearing ring 19 is switched in the supporting position under the action of the automatic switching unit and the driving mechanism I and II, then the quick-change disc male disc 14 is separated from the master disc 13, the rotating shaft 15 drives the bearing ring 9 to start rotating, the probe 12 moves to the inner surface of the bearing ring 19 at the same time, scanning is started, all surfaces covering the inner surface of the bearing ring 19 are scanned, the rotation is stopped after the upper end surface and the lower end surface are finished, the probe 12 returns to a safe position, the scanning is finished, and the supporting block drives the bearing ring 19 to ascend; then the PLC system receives the measurement result fed back by the measurement system, displays the measurement result on a screen and displays the measurement result through a three-color alarm lamp; according to the measuring result, the bearing ring meeting the requirement is placed to the OK product channel 7 through the air claw on the linear motor lifting and displacing mechanism, the bearing ring not meeting the requirement is measured again, and the bearing ring is still not qualified, and then the bearing ring is placed to the NG product channel 8 through the air claw on the linear motor displacing mechanism.
In the embodiment, the PLC system designs a complex motion trajectory for the movement of the probe 12, the system automatically calculates the start coordinate and the end coordinate by the input model external dimensions, and the movement of each step needs to determine whether the position of the rib is required, and the chamfer and the edge of the probe 12 need to be automatically avoided, so that the probe 12 and the bearing ring 19 keep a safe distance, and the surface of the bearing ring is detected in the maximum area.
The device is characterized in that the calibration unit 6 is arranged between the flaw detection unit 5 and the feeding chain plate 4, the sample ring is placed on a rotary disc 9 of the calibration unit 6, when sensitivity calibration is periodically executed, an air claw on a linear motor displacement mechanism descends to grab a bearing ring 19 on a supporting disc of the calibration unit 6 and then ascends to move above the flaw detection unit 5 in parallel, the lifting mechanism drives the air claw to descend to be placed on a supporting block of the flaw detection unit 5, flaw detection scanning is executed on each surface of the sample ring, and whether sensor setting is normal is judged according to the intensity of scanned defect signals.
In the embodiment, the upper end face, the outer diameter and the lower end face of the sample ring are respectively provided with artificial crack defects and are respectively used for calibrating the sensors at the lower side, the middle side and the upper side of the probe matrix, only the bottom sensor is started for scanning when the upper end face is scanned, only the side sensor is started for scanning when the outer diameter is scanned, and only the top sensor is started for scanning when the lower end face is scanned. The equipment needs to calibrate the sample ring regularly, scans the defective surface of the sample ring, sets an upper limit and a lower limit aiming at the defect scanning result, and considers that the sensitivity calibration is qualified when the defect signal intensity is between the upper limit and the lower limit.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The full-surface eddy current detection equipment for the bearing ring is provided with a feeding platform, a demagnetization unit and a flaw detection unit; the method is characterized in that: the flaw detection unit is provided with a limiting and centering supporting mechanism arranged at a measuring station; the limiting and centering support mechanism is provided with a turntable; the turntable is provided with a centering supporting element; the number of the centering support elements is at least three, and the centering support elements are uniformly distributed along the circumference; the centering support elements are uniformly distributed along the circumference and support and limit the bearing ring under the condition of ensuring the concentricity of the centering support elements and the bearing ring; each of said centering and supporting elements has two supporting surfaces: a first supporting surface and a second supporting surface; the second supporting surface is arranged corresponding to the bearing ring with an annular flange on the lower end surface of the inner surface or the outer surface; the second supporting surface is used for supporting part of the annular surface of the lower end surface of the bearing ring by one side with the annular flange surface; the first supporting surface supports a part of annular surface of the lower end surface of the bearing ring from one side without the annular flange surface; the part of the annular surface of the lower end surface of the bearing ring, which is matched with the first supporting surface and the second supporting surface, is less than one half of the lower end surface of the bearing ring, so that enough space is reserved for detecting the lower end surface of the bearing ring which is not contacted with the supporting surface; the first supporting surface and the second supporting surface are arranged, so that a space is formed between the detected bearing ring and the turntable, and the space forms a space for detecting the lower end surface of the bearing ring; each centering support element is also provided with a centering datum plane I and a centering datum plane II; the centering reference surface I is matched with the first supporting surface for use, and the centering reference surface II is matched with the second supporting surface for use; when the centering reference surface I and the centering reference surface II are matched with the first supporting surface and the second supporting surface for use, the centering reference surface I or the centering reference surface II is tangent to the outer diameter surface or the inner diameter surface of the corresponding bearing ring;
an automatic switching unit is arranged in cooperation with the centering support element; the automatic switching unit is provided with a plurality of supporting elements which are uniformly distributed along the circumference, and the plurality of supporting elements and the plurality of centering supporting elements are arranged in a staggered manner; a driving mechanism II which enables the supporting element to ascend and descend relative to the rotary table is arranged corresponding to the supporting element; after the plurality of centering support elements support the bearing ring from the inner side or the outer side and complete detection, the automatic switching unit is used for automatically upwards supporting the bearing ring and enabling the bearing ring to be separated from the centering support elements, the centering support elements synchronously move outwards or inwards at equal intervals under the action of the driving mechanism I, the bearing ring descends under the action of the automatic switching unit, and the plurality of centering support elements support the bearing ring from the outer side or the inner side so as to realize automatic switching of the bearing ring from the inner side or the outer side to the outer side or the inner side;
the probe for carrying out flaw detection on the bearing ring is arranged above the measuring station; the probe is provided with an upper detection surface, a lower detection surface and a detection surface which are arranged in parallel, and the detection surface is arranged vertically; the upper detection surface of the probe is provided with a sensor I for detecting the lower end surface of the bearing ring and the lower end surface of the step; the detection surface of the probe is provided with a sensor II for detecting the outer diameter surface or the raceway surface or the inner diameter surface of the bearing ring; the sensors II are arranged in two rows, and the two rows of sensors II are arranged in a staggered manner; the lower detection surface of the probe is provided with a sensor III for detecting the upper end surface of the bearing ring and the upper end surface of the step.
2. The bearing ring full-surface eddy current testing apparatus according to claim 1, wherein: the body of the centering support element is provided with an annular bulge protruding outwards; the annular bulge is two arranged from top to bottom: the annular bulge I and the annular bulge II are formed; the upper end face of the annular protrusion I forms the first supporting surface, and the body part of the centering supporting element at the upper part of the annular protrusion I is used as a centering reference surface I; the upper end face of the annular protrusion II forms the second supporting face, and the outer diameter face of the annular protrusion I serves as a centering reference face II.
3. The bearing ring full-surface eddy current testing apparatus according to claim 1, wherein: the flaw detection unit is connected with the feeding platform through a feeding chain plate and a right-angle steering mechanism; the feeding chain plate is connected with the right-angle steering mechanism, a model identification station is arranged on the feeding chain plate, an industrial camera is used for automatically identifying the model of a product, and an inner ring and an outer ring are distinguished so as to call scanning parameters of different bearing models; the feeding chain plate and the flaw detection unit move the pneumatic claw to grab the bearing ring and place the bearing ring in the flaw detection unit through the X-direction displacement mechanism and the Z-direction lifting mechanism.
4. The bearing ring full-surface eddy current testing apparatus according to claim 3, wherein: the right-angle steering mechanism is provided with an X displacement direction chain plate and a Y displacement direction chain plate, the bearing ring enters the right-angle steering mechanism under the driving of the X displacement direction chain plate, the X displacement direction chain plate is lowered below a plane, and the Y displacement direction chain plate drives the bearing ring to displace in the Y direction and enter the feeding chain plate.
5. The bearing ring full-surface eddy current testing apparatus according to claim 1, wherein: the demagnetization unit is provided with a lifting mechanism and a demagnetization plate, the lifting mechanism drives the bearing ring to be close to the demagnetization plate for demagnetization, and the lifting mechanism drives the bearing ring to return after demagnetization is finished.
6. The bearing ring full-surface eddy current testing apparatus according to claim 1, wherein: and a calibration unit is arranged between the flaw detection unit and the feeding chain plate.
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| CN202111207171.8A CN113984885B (en) | 2021-10-18 | 2021-10-18 | Bearing ring full-surface eddy current testing equipment |
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| CN202111207171.8A CN113984885B (en) | 2021-10-18 | 2021-10-18 | Bearing ring full-surface eddy current testing equipment |
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Cited By (1)
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| CN117388354A (en) * | 2023-10-11 | 2024-01-12 | 南京博克纳自动化系统有限公司 | Bearing ring surface vortex detection equipment |
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| CN113984885B (en) | 2023-05-23 |
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