CN103808506A - Method for measuring and determining fatigue limit of gear wheel - Google Patents
Method for measuring and determining fatigue limit of gear wheel Download PDFInfo
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- CN103808506A CN103808506A CN201210443522.XA CN201210443522A CN103808506A CN 103808506 A CN103808506 A CN 103808506A CN 201210443522 A CN201210443522 A CN 201210443522A CN 103808506 A CN103808506 A CN 103808506A
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- tooth
- gear
- gear wheel
- measuring
- fatigue limit
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Abstract
The invention relates to a method for measuring and determining a fatigue limit of a gear wheel, wherein the method is belongs to the field of improvement of the method for measuring and determining the fatigue limit of the gear wheel. The invention aims at providing a method that has the low error rate and is capable of completing gear wheel testing rapidly. According to the employed technical scheme, the method comprises the following steps that: firstly, a to-be-measured gear wheel is clamped by a clamping tool and loads are ensured to be distributed uniformly along the gear width; secondly, a microhardness tester is used for measuring hardness of the central portion, the tooth surface, and the root of the tooth respectively; thirdly, a maximum static load is tested under the circumstances that the tooth is not fractured; and fourthly, a stress step testing method is used to set a maximum cycle index for each grade on the condition of the same grading load increment.
Description
Technical field
The invention belongs to the improvement of the method for measuring gear fatigue limit.
Background technology
Because the smelting of metal all has some differences at home and abroad, even if make the metal of same component, also have different character, therefore, in order to guarantee appropriate design serviceable life and reliability, the measurement of the fatigue resistance of gear is just particularly important.
At present, the measuring method of existing gear fatigue resistance typically uses a large amount of products, carries out life-cycle test; Although this method can obtain the life-cycle probability of gear,, because this method not only needs a large amount of funds, produce enough to be measured and test; Also need to wait for to be measured time that completes life cycle management; This is the significant wastage to fund and time.
In addition, the error rate of this metering system is also higher; If want to reduce error rate, the quantity of measured piece also can improve; The fund that consumed so also can increase considerably; Lose more than gain.
Summary of the invention
The present invention is exactly for the problems referred to above, provides a kind of error rate low, and can complete fast the method to gear testing.
For reaching above-mentioned purpose of the present invention, the present invention by the following technical solutions.
One, by fixture, gear to be measured is clamped, and guarantee that load is uniformly distributed along the facewidth.
Two, by the microhardness testers hardness of the centre to tooth, the flank of tooth and tooth root respectively.
Three, in the situation that there is not fracture in the gear teeth, test maximum static lotus.
Four,, under the condition of same hierarchical increment of load, applied stress step test method, arranges every grade of maximum cycle.
Beneficial effect of the present invention.
1, method of operating is simple.
Method of operating of the present invention is: one, by fixture, gear to be measured is clamped, and guarantee that load is uniformly distributed along the facewidth; Two, by the microhardness testers hardness of the centre to tooth, the flank of tooth and tooth root respectively; Three, in the situation that there is not fracture in the gear teeth, test maximum static lotus; Four,, under the condition of same hierarchical increment of load, applied stress step test method, arranges every grade of maximum cycle; Five, calculate fatigue resistance by formula, step is few, operates very simple.
2, save the working time.
The present invention, by above-mentioned steps, can measure the fatigue resistance of gear, without carrying out life-cycle experiment; Therefore, greatly saved the time of detecting; Enhance productivity.
3, measurement result is accurate.
Because method of testing of the present invention is simple, and step is few; The link that produces error also greatly reduces; It is comparatively reasonable between method of testing step and step, to coordinate, and combines closely; Thereby guarantee the degree of accuracy of measurement result.Error is no more than 4 percent.
Embodiment
The present invention by the following technical solutions.
One, by fixture, gear to be measured is clamped, and guarantee that load is uniformly distributed along the facewidth.
Two, by the microhardness testers hardness of the centre to tooth, the flank of tooth and tooth root respectively.
Three, in the situation that there is not fracture in the gear teeth, test maximum static lotus.
Four,, under the condition of same hierarchical increment of load, applied stress step test method, arranges every grade of maximum cycle.
Embodiment.
Selecting precision is 7 grades, and base pitch mean deviation is 18.4 μ m, adopts carburizing+quenching+low-temperature tempering heat treatment technique.
Measuring tooth centre hardness is 614HV0.025, and flank of tooth Rockwell's hardness is 52HRC, and tooth root Rockwell's hardness is 20-30HRC.
In step 3, maximum static lotus is 100kN.
In step 4, maximum cycle is set to 2.0 × 10
5.
Experiment completes, and 7 testing sites are single tooth failure, does not occur that two gear teeth all run off phenomenon.
Finally calculating bending fatigue limit maximal value is 424.250-453.967MPa, considers the error of experimental technique, and desirable 424.250MPa is as the fatigue limit of gear.
Described microscope is M-400-H1 type microscope.
The present invention can adopt STRON1603 electromagnetic resonance fatigue tester.
Claims (3)
1. the method for measuring gear fatigue limit, is characterized in that:
One, by fixture, gear to be measured is clamped, and guarantee that load is uniformly distributed along the facewidth;
Two, by the microhardness testers hardness of the centre to tooth, the flank of tooth and tooth root respectively;
Three, in the situation that there is not fracture in the gear teeth, test maximum static lotus;
Four,, under the condition of same hierarchical increment of load, applied stress step test method, arranges every grade of maximum cycle.
2. the method for mensuration gear fatigue limit according to claim 1, is characterized in that: in step 2, use M-400-H1 type microscope.
3. the method for mensuration gear fatigue limit according to claim 1 and 2, is characterized in that: in step 3, use STRON1603 electromagnetic resonance fatigue tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210443522.XA CN103808506A (en) | 2012-11-08 | 2012-11-08 | Method for measuring and determining fatigue limit of gear wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210443522.XA CN103808506A (en) | 2012-11-08 | 2012-11-08 | Method for measuring and determining fatigue limit of gear wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103808506A true CN103808506A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210443522.XA Pending CN103808506A (en) | 2012-11-08 | 2012-11-08 | Method for measuring and determining fatigue limit of gear wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103808506A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142107A (en) * | 2018-09-28 | 2019-01-04 | 武汉理工大学 | A kind of evaluation method of bituminous concrete fatigue behaviour |
| CN110907171A (en) * | 2019-12-06 | 2020-03-24 | 重庆大学 | Polymer gear durability test method |
-
2012
- 2012-11-08 CN CN201210443522.XA patent/CN103808506A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142107A (en) * | 2018-09-28 | 2019-01-04 | 武汉理工大学 | A kind of evaluation method of bituminous concrete fatigue behaviour |
| CN110907171A (en) * | 2019-12-06 | 2020-03-24 | 重庆大学 | Polymer gear durability test method |
| CN110907171B (en) * | 2019-12-06 | 2021-04-20 | 重庆大学 | Polymer gear durability test method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |