CN105333981A - Method of precisely detecting residual stress of oversized and overweight cast steel gear - Google Patents
Method of precisely detecting residual stress of oversized and overweight cast steel gear Download PDFInfo
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Abstract
The invention discloses a method of precisely detecting residual stress of an oversized and overweight cast steel gear. A playing table method is used for determining and selecting the most proper detection part of a to-be-detected oversized and overweight cast steel gear; pre-grinding step by step is carried out on the detection part, pre-grinding is formed by coarse grinding, fine grinding and precise grinding, and after grinding, roughness Ra of the detected surface is no larger than 1mum; electrolytic polishing is carried out on the detected oversized and overweight cast steel gear; the levelness and the distance of an X-ray residual stress detector are precisely adjusted; and parameters of a detection equipment host are adjusted to detect the detection part, a precise and representative detection result is obtained, and the detection result is recorded. According to a set of specially-prepared detection scheme which is tight in process and precise in operation, errors during each step of detection process are reduced to the minimum, and a detection result which can precisely and truly represent the actual stress distribution state and the stress value of the oversized and overweight cast steel gear can be obtained.
Description
Technical field
The present invention relates to a kind of unrelieved stress detection method, specifically a kind of method of accurate detection super-big and overweight cast steel gear unrelieved stress.
Background technology
Super-big and overweight cast steel gear refers to that mass diameter is greater than 6m, or double teeming steel gear more than weight 50t; Some mining machinery super-big and overweight cast steel gear used, volume is comparatively large, and quality is also heavier, but its requirement on machining accuracy is higher again; In process of production, machining precision is wanted and is subject to the impact of interiors of products unrelieved stress, and the therefore processing of super-big and overweight cast steel gear, proposes higher requirement to the detection degree of accuracy of the unrelieved stress of testing product.
Unrelieved stress detection method conventional at present comprises ring core method, boring method, X-ray diffraction method, magnetic bullet method, supercritical ultrasonics technology etc., detecting unrelieved stress in super-big and overweight forge piece field most widely used is ring core method, instead of measurement result is X-ray diffraction method the most accurately.And ring core method can only be used for the detection of major axis class rotor forging product, be not suitable for the stress mornitoring of cast steel product.To X-ray diffraction method is used for super large, the unrelieved stress of superduty cast steel gear detects, and is very difficult, a domestic task that there is no entity and individual and carry out at present.
The difficult point of accurate detection super-big and overweight cast steel gear unrelieved stress is mainly following two factors: one, because cast steel gear has segregation, the inherent vice such as loose, these defects seriously can reduce the homogeneity of product, and the transferability of internal stress, thus make the unrelieved stress of a certain ad-hoc location might not represent the residual stress level of whole product or product specific region; Its two, during X-ray diffraction method testing product unrelieved stress, can only-20 μm of degree of depth in 10 μm, top layer, testing product pole, residual-stress value within the scope of Φ 1mm-5mm, representative poor.Therefore only by x-ray stress analyzer in the detection of product surface local location unrelieved stress, can not fully the true residual stress level of representative products and the regularity of distribution.
Summary of the invention
The present invention seeks to the difficult point for solving the problems of the technologies described above, there is provided a kind of method of accurate detection super-big and overweight cast steel gear unrelieved stress, to obtain accurately, can the testing result of true representations super-big and overweight type cast steel gear actual stress distribution and stress value.
The present invention for solving the problems of the technologies described above adopted technical scheme is: a kind of method of accurate detection super-big and overweight cast steel gear unrelieved stress, comprises the following steps:
Step one, use signing method are determined and choose the most suitable detection position of super-big and overweight cast steel gear to be checked;
1) aligning centering: super-big and overweight cast steel gear to be checked is placed on machining tool, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, the footpath of carrying out cast steel gear is jumped and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: super-big and overweight cast steel gear to be measured gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate;
3) determine to detect position: usage data process software draws out gear ring deformation tendency figure, finds out maximum distortion position in the drawings; This position and derived other three positions determined by this point, namely can be used as the most representative locations that unrelieved stress detects;
Step 2, substep pre-grinding is carried out to detection position, substep pre-grinding by roughly grinding, fine grinding forms into fine grinding three step, polishing afterwards measured surface roughness Ra is not more than 1 μm;
1) roughly grind: use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, the scope of corase grind polishing is Φ 50mm-Φ 100mm;
2) fine grinding: use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, after polishing, measured surface should be smooth, and roughness Ra is not more than 25 μm;
3) refine: respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be not more than 1 μm;
Step 3, product for different materials, make different Faradaic current values and electropolishing time, enables tested super-big and overweight cast steel gear obtain the most smooth detection surface; Then electropolishing is carried out to tested super-big and overweight cast steel gear; The degree of depth of polishing is preferably 50 μm-1000 μm;
The method of electropolishing is preferably: setting electric current 1.0-2.0A, and polishing velocity is 10-500 μm/min, carries out alcohol washes every 60s to polishing point, remains to remove polishing;
The levelness of step 4, accurate adjustment X ray unrelieved stress detector and distance; Distance between angular instrument and surface, measured point is preferably 9.0mm-10.3mm, and in this numerical range, measurement data is the most accurately with stable;
Step 5, (equipment boosts to 30.0KV to adjustment checkout equipment host parameter, and electric current is 7.0A; Angular instrument two angle of diffraction are all adjusted to 156.4 °, and the time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °), detection position is detected, to obtain accurately, representational testing result, and record testing result.
Beneficial effect is:
1, the inventive method utilizes the macroscopic view handle control to product feature, by adopting the method for operating of simple possible, select the most appropriately, the most effective, most representative detection position, use X ray residual stress analysis instrument, tight according to the process of a set of special establishment, operate accurate detection scheme, error in each step testing process is down to minimum, thus obtain accurately, can the testing result of true representations super-big and overweight type cast steel gear actual stress distribution and stress value.
2, the inventive method adopt signing method to determine the optimum of super-big and overweight cast steel gear detects position, operation is simple, and efficiency is higher, and institute determines that test section potential energy reaches the stress level of accurate representation product key position and the regularity of distribution; The meticulous polishing of measured surface point multistep is not more than 1 μm to roughness Ra by the inventive method, farthest can reduce the impact of external stress, thus significantly improve the accuracy of testing result; For the bull gear that different materials is produced, make different Faradaic current values and electropolishing time, enable examined product possess the pacing items meeting obtain accurate testing result completely; The degree of depth of polishing 50 μm-1000 μm in method, effectively can eliminate the harmful effect of the various mixed and disorderly stress that detected part surface is brought because of machine work because of polishing or product.
Accompanying drawing explanation
Fig. 1 is that in embodiment 1, material is 40CrNi2MoA(structural alloy steel) bull gear deformation tendency figure.
Embodiment
A method for accurate detection super-big and overweight cast steel gear unrelieved stress, comprises the following steps:
Step one, use signing method are determined and choose the most suitable detection position of super-big and overweight cast steel gear to be checked;
1) aligning centering: super-big and overweight cast steel gear to be checked is placed on machining tool, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, the footpath of carrying out cast steel gear is jumped and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: super-big and overweight cast steel gear to be measured gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate;
3) determine to detect position: usage data process software draws out gear ring deformation tendency figure, finds out maximum distortion position in the drawings; This position and derived other three positions determined by this point, namely can be used as the most representative locations that unrelieved stress detects;
Step 2, substep pre-grinding is carried out to detection position, pre-grinding by roughly grinding, fine grinding, fine grinding three step form, polishing afterwards measured surface roughness Ra is not more than 1 μm;
1) roughly grind: use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, notice that the scope of polishing is Φ 50mm-Φ 100mm;
2) fine grinding: use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, after polishing, measured surface should be smooth, and roughness Ra is not more than 25 μm;
3) refine: respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be not more than 1 μm;
Step 3, product for different materials, make different Faradaic current values and electropolishing time, enables tested super-big and overweight cast steel gear obtain the most smooth detection surface; Then electropolishing is carried out to tested super-big and overweight cast steel gear; The degree of depth of polishing is preferably 50 μm-1000 μm;
The method of electropolishing is preferably: setting electric current 1.0-2.0A, and polishing velocity is 10-500 μm/min, carries out alcohol washes every 60s to polishing point, remains to remove polishing;
The levelness of step 4, accurate adjustment X ray unrelieved stress detector and distance; Distance between angular instrument and surface, measured point is preferably 9.0mm-10.3mm, and in this numerical range, measurement data is the most accurately with stable;
Step 5, adjustment checkout equipment host parameter, equipment boosts to 30.0KV, and electric current is 7.0A; Angular instrument two angle of diffraction are all adjusted to 156.4 °, and the time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °), detection position is detected, to obtain accurately, representational testing result, and record testing result.
The technological means realized for making the present invention, creation characteristic and the object reached are convenient to understand, and below in conjunction with embodiment, set forth the present invention further, but the present invention's scope required for protection are not limited to the scope described in embodiment.
embodiment 1
Super-big and overweight cast steel gear in the present embodiment is the bowl mill bull gear of Ф 10.9m × 0.8m, and material is ZG40CrNi
2moA.The method of accurate its unrelieved stress of detection, comprises the following steps:
Step one. use signing method accurately determine and choose the most suitable detection position of super-big and overweight cast steel gear to be checked.
1) aligning centering: be placed on machining tool by gear to be checked, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, carry out footpath jumping and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: super-big and overweight cast steel gear to be measured gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate; Measurement data is in table 1.
Table 1ZG40CrNi2MoA bull gear beats table footpath jumping figure according to (mm)
3) determine to detect position.Excel is used to draw out gear ring deformation tendency figure, as shown in Figure 1.The maximum distortion position finding out gear ring is in FIG point 8, then position 8 and its Central Symmetry position 23 circumferentially, and namely 15 and 30, four, the intersection point of the vertical line of these 2 lines and circumference can be used as the most representative locations of unrelieved stress detection.
Step 2, substep pre-grinding is carried out to above-mentioned four positions, pre-grinding by roughly grinding, fine grinding, fine grinding three step form, after polishing, measured surface roughness Ra is not more than 1 μm.
1) roughly grind.Use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, polishing scope is about Φ 65mm;
2) fine grinding.Use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, and after polishing, measured surface should be smooth, and roughness Ra is not more than 25 μm;
3) refine.Respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be not more than 1 μm.
Step 3, determine accurate electropolishing parameter: setting electropolishing current 1.0A, now polishing velocity is 10 μm/min, carries out alcohol washes every 60s to polishing point, remains to remove polishing.Carry out electropolishing to product, the degree of depth is 300 μm.
The levelness of step 4, accurate adjustment X ray unrelieved stress detector, the distance between adjustment angular instrument and surface, measured point is 10.1mm.
Step 5, equipment boost to 30.0KV, and electric current is 7.0A; Angular instrument two angle of diffraction are all adjusted to 156.4 °, and the time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °.Detection position is detected, to obtain accurately, representational testing result, and record testing result.
Table 2 bull gear exemplary position unrelieved stress testing result (MPa)
| Position | 8 | 15 | 23 | 30 |
| Residual-stress value | 603.8 | 59.8 | 499.7 | 57 |
From data in table, the maximum No. 8 position residual-stress value of deflection are also maximum, No. 23 positions also have the feature of all fours with it, and the residual-stress value of these two positions is much larger than the residual-stress value of No. 15 and No. 30 positions, this unrelieved stress testing result with to survey the deformation of gear very identical.
embodiment 2
Super-big and overweight cast steel gear in the present embodiment is the Gear of Ball Mill of Ф 8.9m × 1m, and material is ZG45MnMo.Accurate detection this take turns the method for unrelieved stress, comprise the following steps:
Step one, use signing method are determined and choose the most suitable detection position of this gear.
1) aligning centering: be placed on machining tool by this gear, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, the footpath of carrying out cast steel gear is jumped and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: this gear under test gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate; Measurement data is in table 3.
Table 3ZG45MnMo bull gear beats table footpath jumping figure according to (mm)
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 0 | 0 | 0.15 | 0.22 | 0.52 | 0.73 | 0.74 | 0.74 | 0.70 | 0.72 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0.73 | 0.5 | 0.30 | 0.23 | 0.26 | 0.27 | 0.47 | 0.63 | 0.81 | 0.99 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 1.13 | 1.35 | 1.25 | 1.27 | 1.07 | 0.88 | 0.66 | 0.45 | 0.27 | 0.17 |
3) determine to detect position: usage data process software draws out gear ring deformation tendency figure, finds this gear ring maximum distortion position to be 22 in the drawings; Then this position and its Central Symmetry position 8 circumferentially, and the intersection point 1 and 14 of the vertical line of these 2 lines and circumference, 4 most representative locations that namely can be used as the detection of this gear ring unrelieved stress.
Step 2, substep pre-grinding is carried out to detection position, pre-grinding by roughly grinding, fine grinding, fine grinding three step form, polishing afterwards measured surface roughness Ra is not more than 1 μm;
1) roughly grind: use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, the scope of polishing is about Φ 100mm;
2) fine grinding: use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, after polishing, roughness Ra is 10 μm;
3) refine: respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be 0.5 μm;
Step 3, gear product for ZG45MnMo material, setting electropolishing current 1.5A, polishing velocity is 100 μm/min, carries out alcohol washes every 60s to polishing point, remains to remove polishing.Carry out electropolishing to product, the polishing degree of depth is 50 μm.
The levelness of step 4, accurate adjustment X ray unrelieved stress detector and distance; Distance between angular instrument and surface, measured point is 9.0mm;
Step 5, adjustment checkout equipment host parameter, equipment boosts to 20.0KV, and angular instrument two angle of diffraction are all adjusted to 156.4 °, time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °, detection position is detected, and records testing result.
Table 4 bull gear exemplary position unrelieved stress testing result (MPa)
| Position | 1 | 8 | 14 | 22 |
| Residual-stress value | 32.7 | 237.8 | 20.6 | 401.4 |
embodiment 3
Super-big and overweight cast steel gear in the present embodiment is the Gear of Ball Mill of Ф 9.72m × 0.8m, and material is ZG42CrMo.The method of this gear unrelieved stress of accurate detection, comprises the following steps:
Step one, use signing method are determined and choose the most suitable detection position of super-big and overweight cast steel gear to be checked;
1) aligning centering: super-big and overweight cast steel gear to be checked is placed on machining tool, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, the footpath of carrying out cast steel gear is jumped and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: super-big and overweight cast steel gear to be measured gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate; Measurement data is in table 5.
Table 5ZG42CrMo bull gear beats table footpath jumping figure according to (mm)
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 0 | 0.12 | 0.25 | 0.45 | 0.68 | 0.96 | 0.94 | 0.82 | 0.80 | 0.72 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 0.63 | 0.52 | 0.48 | 0.31 | 0.26 | 0.27 | 0.43 | 0.64 | 0.85 | 0.95 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 1.48 | 1.45 | 1.15 | 1.03 | 0.94 | 0.85 | 0.62 | 0.35 | 0.25 | 0.18 |
3) determine to detect position: usage data process software draws out this gear ring deformation tendency figure, finds this gear ring maximum distortion position to be 21 in the drawings; Then this position and its Central Symmetry position 6 circumferentially, and the intersection point 1 and 15 of the vertical line of these 2 lines and circumference, 4 most representative locations that namely can be used as the detection of this gear ring unrelieved stress.
Step 2, substep pre-grinding is carried out to detection position, pre-grinding by roughly grinding, fine grinding, fine grinding three step form, polishing afterwards measured surface roughness Ra is not more than 1 μm;
1) roughly grind: use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, polishing scope Φ 50mm;
2) fine grinding: use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, after polishing, measured surface should be smooth, and roughness Ra is not more than 25 μm;
3) refine: respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be not more than 1 μm;
Step 3, gear product for ZG42CrMo material, setting electropolishing current 2.0A, polishing velocity is 500 μm/min, carries out alcohol washes every 60s to polishing point, remains to remove polishing.Carry out electropolishing to product, the polishing degree of depth is 1000 μm.
The levelness of step 4, accurate adjustment X ray unrelieved stress detector and distance; Distance between angular instrument and surface, measured point is 10.3mm, and in this numerical range, measurement data is the most accurately with stable;
Step 5, adjustment checkout equipment host parameter, equipment boosts to 30.0KV, and electric current is 7.0A; Angular instrument two angle of diffraction are all adjusted to 156.4 °, and the time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °, detect, to obtain accurately, representational testing result, and record testing result detection position.
Table 6 bull gear exemplary position unrelieved stress testing result (MPa)
| Position | 1 | 6 | 15 | 21 |
| Residual-stress value | 74.3 | 331.2 | 86.7 | 587.5 |
Above-mentioned example shows, utilize unrelieved stress detection means provided by the present invention, the unrelieved stress numerical value of exemplary position on super-big and overweight cast steel gear product can be recorded accurately, and the deformation rule of measured result and super-big and overweight cast steel gear well coincide, that is this invention can weigh the super-big and overweight cast steel gear stress distribution law having certain machining deformation accurately.The obvious accurate and effective of innovation effect that this invention produces.
Claims (7)
1. accurately detect a method for super-big and overweight cast steel gear unrelieved stress, it is characterized in that: comprise the following steps:
Step one, use signing method are determined and choose the most suitable detection position of super-big and overweight cast steel gear to be checked;
1) aligning centering: super-big and overweight cast steel gear to be checked is placed on machining tool, is in the free state thrown the reins to; Dial gauge is fixed on knife bar, the footpath of carrying out cast steel gear is jumped and end jumping detection, record the maximum footpath of deviation to jump and end jumping figure certificate, use copper rod to adjust maximum deviation position on super-big and overweight cast steel gear successively and ensure that the center of circle of gear ring and lathe overlaps completely, whereby cast steel gear is accurately located; Play table, adjustment carries out three times repeatedly, ensure positioning precision;
2) measure distortion: super-big and overweight cast steel gear to be measured gear ring circumferentially, uniform measurement and record 30 points footpath jumping figure certificate;
3) determine to detect position: usage data process software draws out gear ring deformation tendency figure, finds out maximum distortion position in the drawings; This position and derived other three positions determined by this point, namely can be used as the most representative locations that unrelieved stress detects;
Step 2, substep pre-grinding is carried out to detection position, substep pre-grinding by roughly grinding, fine grinding and fine grinding three step form, polishing afterwards measured surface roughness Ra is not more than 1 μm;
1) roughly grind: use the hard grinding wheel sheet of hand electric emery wheel and granularity 60# to roughly grind, the scope of corase grind is Φ 50mm-Φ 100mm;
2) fine grinding: use hand electric emery wheel, the polishing film using granularity 280# instead carries out fine grinding, after polishing, measured surface should be smooth, and roughness Ra is not more than 25 μm;
3) refine: respectively adopt granularity be 320# and 500# abrasive paper for metallograph to after fine grinding measured position polishing, polishing after measured surface roughness Ra be not more than 1 μm;
Step 3, product for different materials, make different Faradaic current values and electropolishing time, enables tested super-big and overweight cast steel gear obtain the most smooth detection surface; Then electropolishing is carried out to tested super-big and overweight cast steel gear;
The levelness of step 4, accurate adjustment X ray unrelieved stress detector and distance; Show through great number tested data, the distance between angular instrument and surface, measured point is between 9.0mm-10.3mm, and measurement data is the most accurately with stable;
Step 5, adjustment checkout equipment host parameter, equipment boosts to 30.0KV, and electric current is 7.0A; Angular instrument two angle of diffraction are all adjusted to 156.4 °, and the time shutter is 5s, and the anglec of rotation is 90 °, and angle of inclination is-45 °-45 °, detect, obtain testing result accurately, and record testing result detection position.
2. the method accurately detecting Large Cast Steel Gear unrelieved stress as claimed in claim 1, is characterized in that: angular instrument described in step 4 and the distance between surface, measured point are at 9.0mm-10.3mm.
3. the method accurately detecting Large Cast Steel Gear unrelieved stress as claimed in claim 1, is characterized in that: the degree of depth of electropolishing described in step 3 is 50 μm-1000 μm.
4. the method accurately detecting Large Cast Steel Gear unrelieved stress as claimed in claim 1, is characterized in that: the electric current of electropolishing described in step 3 is 1.0-2.0A.
5. the method accurately detecting Large Cast Steel Gear unrelieved stress as claimed in claim 1, is characterized in that: the speed of polishing in electrolysis described in step 3 is 10-500 μm/min.
6. the method for the accurate detection Large Cast Steel Gear unrelieved stress as described in claim 4 or 5, is characterized in that: electropolishing described in step 3, carries out alcohol washes every 60s to polishing point, remains to remove polishing.
7. the method accurately detecting Large Cast Steel Gear unrelieved stress as claimed in claim 1, is characterized in that: data processing software described in step one is Origin or Excel.
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|---|---|---|---|---|
| CN106289899A (en) * | 2016-07-25 | 2017-01-04 | 中航工业哈尔滨轴承有限公司 | A kind of bearing parts residual stress is along the preparation method of layer depth distribution detection sample |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451965A (en) * | 2008-12-29 | 2009-06-10 | 重庆大学 | Method for detecting residual stress of steel by X-ray |
| JP2013036787A (en) * | 2011-08-04 | 2013-02-21 | Toyota Motor Corp | Method for measuring residual stress in thin plate |
| CN103630564A (en) * | 2013-03-29 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Measure method for residual stress of high-speed train body |
-
2015
- 2015-11-10 CN CN201510759078.6A patent/CN105333981B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451965A (en) * | 2008-12-29 | 2009-06-10 | 重庆大学 | Method for detecting residual stress of steel by X-ray |
| JP2013036787A (en) * | 2011-08-04 | 2013-02-21 | Toyota Motor Corp | Method for measuring residual stress in thin plate |
| CN103630564A (en) * | 2013-03-29 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Measure method for residual stress of high-speed train body |
Non-Patent Citations (1)
| Title |
|---|
| 陈毅: "20CrMnMo齿轮齿根残余应力理论及试验研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
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| CN106289899A (en) * | 2016-07-25 | 2017-01-04 | 中航工业哈尔滨轴承有限公司 | A kind of bearing parts residual stress is along the preparation method of layer depth distribution detection sample |
| CN107253099A (en) * | 2017-07-30 | 2017-10-17 | 安吉圆磨机械科技有限公司 | A kind of flywheel polishing process |
| CN107263221A (en) * | 2017-07-30 | 2017-10-20 | 安吉圆磨机械科技有限公司 | A kind of flywheel technique for grinding |
| CN107322373A (en) * | 2017-07-30 | 2017-11-07 | 安吉圆磨机械科技有限公司 | A kind of technique for grinding on flywheel surface |
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| CN109827691B (en) * | 2019-03-21 | 2019-12-31 | 重庆大学 | Tooth surface residual stress measuring method |
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