CN101710002A - Method for testing temperature rise of spindle of numerical control lathe - Google Patents
Method for testing temperature rise of spindle of numerical control lathe Download PDFInfo
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- CN101710002A CN101710002A CN200910231742A CN200910231742A CN101710002A CN 101710002 A CN101710002 A CN 101710002A CN 200910231742 A CN200910231742 A CN 200910231742A CN 200910231742 A CN200910231742 A CN 200910231742A CN 101710002 A CN101710002 A CN 101710002A
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Abstract
The invention discloses a method for testing temperature rise of a spindle of a numerical control lathe, which comprises the following steps: setting the initial speed, promoting value of the speed of each level and the maximum speed of the spindle according to a main parameter of the numerical control lathe; measuring the temperature of a spindle bearing in real time, if the temperature rise exceeds a set temperature T1 in unit time at the speed of each level, controlling the spindle to continue the running-in at the speed of the level, and otherwise promoting the current speed to the speed of next level; repeating the steps until the spindle is up to the maximum speed; when performing the running-in at the maximum speed, measuring the temperature of the spindle bearing in real time, if the temperature rise exceeds a set temperature T2 in unit time, continuing the running-in until the temperature rise accords with the temperature rise standard, then determining that the temperature rise of the spindle is qualified, and stopping testing; and if the temperature of the spindle bearing exceeds 70 DEG C or the temperature rise of the spindle bearing exceeds 35 DEG C/hour, determining that temperature rise of the spindle is below standard, and stopping the testing. The method can prevent the bearing from reaching an extreme temperature and being damaged, and the assembly quality of spindle components is improved effectively.
Description
Technical field
The invention belongs to the technical field of test numerically controlled lathe, be specifically related to a kind of method for testing temperature rise of spindle of numerical control lathe.
Background technology
At present, numerically controlled lathe has obtained widespread usage in China, for solid foundation has been established in the mechanization manufacturing and the production of China.Wherein, main shaft is the core component of numerically-controlled machine, and therefore precision and the rigidity to main shaft requires very high.Generally speaking, the trueness error and the deflection of each part of main shaft self are very little, but when running up, the bearing heating amount is very big, cause bearing temperature rise very high, cause thermal deformation, and the error that thermal deformation causes is much larger than trueness error and deflection, and thermal deformation has directly changed the pretension situation of bearing, influence the machining precision of the stiffness characteristics and the main shaft of bearing, when serious, even cause the hot interlock of bearing, main shaft bearing is damaged.Above-mentioned spindle heat generation problem can reduce its reliability in production application, and it is very significant therefore the main shaft bearing temperature rise reasonably being controlled.
At the problems referred to above, Machinery Ministry has sent mechanical industry standard JB/T 4368.3-96 " numerical control horizontal lathe technical conditions ", temperature rise test has wherein stipulated that lathe main motion mechanism is from low speed, do basic, normal, high speed running, must not be less than 2min the duration of runs of every step velocity, the time enough (must not be less than 1h) that should turn round when maximum speed makes main shaft bearing and power cutter spindle bearing reach equilibrium temperature, the temperature and the temperature rise of check main shaft bearing and power cutter spindle bearing; Its temperature must not surpass 70 ℃, and temperature rise must not be above 35 ℃.
Yet, when testing according to above-mentioned standard, because main shaft is shorter in the time of basic, normal, high speed running, also do not reach the fully stable maximum speed of just going between main shaft and the bearing, and when maximum speed the duration of runs longer, make main shaft bearing temperature when maximum speed sharply rise, temperature very easily reaches capacity, thereby bearing is caused damage, further influenced the assembly quality of spindle unit.
Summary of the invention
The method for testing temperature rise that the purpose of this invention is to provide a kind of spindle of numerical control lathe avoiding damaging main shaft bearing, and improves the assembly quality of spindle of numerical control lathe bearing.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of method for testing temperature rise of spindle of numerical control lathe comprises the steps:
(1) sets starting velocity, every step velocity lifting values and the maximum speed of main shaft according to the principal parameter of numerically controlled lathe;
(2) temperature of The real time measure main shaft bearing, under each step velocity, when surpassing design temperature T1 as if temperature rise in the unit interval, the control main shaft continues running-in under this step velocity, otherwise present speed is risen to next stage speed;
(3) repeating step (2) reaches maximum speed until main shaft, under maximum speed during running-in, the temperature of The real time measure main shaft bearing, when if temperature rise surpasses design temperature T2 in the unit interval, then continue running-in, until meeting above-mentioned temperature rise standard, then this moment, the main shaft bearing temperature reached capacity, the main shaft temperature rise is qualified, end of test;
If in step (2) and (3), when the main shaft bearing temperature surpasses 70 ℃ or main shaft bearing temperature rise above 35 ℃/h, judge that then the main shaft temperature rise is defective, end of test.
Further technical scheme in the described step (2), under each step velocity, when surpassing 0.5 ℃ as if temperature rise in 10 minutes, is controlled main shaft and is continued running-in under this step velocity, otherwise present speed is risen to next stage speed; In the described step (3), during running-in, if temperature rise in 1 hour surpasses 5 ℃, then continue running-in under maximum speed, less than 5 ℃/hour, then this moment, the main shaft bearing temperature reached capacity until temperature rise, and the main shaft temperature rise is qualified, end of test.
Such scheme is an example, can set different temperature rise standards at the numerically controlled lathe of different type of machines, promptly sets different T1, T2, and T1 and T2 can be identical or different, for same lathe, also can adjust this temperature rise standard according to actual conditions; With the speed of mainshaft,, improve the assembly quality of spindle of numerical control lathe parts by real-time control to the temperature velocity in the dry run process of the test according to temperature rise situation control numerically controlled lathe.Described temperature survey can be gathered the main shaft temperature rise by the configuration temperature sensor, guarantees the accuracy and the real-time of main shaft temperature, temperature measurement data.
Above, the temperature rise of the basic, normal, high rotating speeds at different levels by control lathe main motion system, make bearing in lower temperature range, reach thermal equilibrium, promptly when each low-speed running, all level off to after the thermal equilibrium, just enter maximum speed then, thereby at maximum speed lower main axis bearing the situation that temperature sharply rises can appear seldom, thereby bearing reach capacity temperature and damage have been prevented, thereby effectively having improved the assembly quality of spindle unit, this all is extremely important to stability and the reliability that improves the main shaft work in-process.When the main shaft temperature rise test began, heat also had little time to spread out of, and bearing temperature rises gradually; When bearing temperature rose to certain value, the viscosity of grease descended thereupon, and the bearing heating amount descends accordingly, the temperature difference of outer race and cabinet exterior increases simultaneously, and amount of thermal conduction increases simultaneously, and heat dissipation capacity is equal to or greater than thermal value, bearing temperature descends, and reaches thermal equilibrium about a certain temperature.
Because the employing of technique scheme, compared with prior art, the present invention has following advantage:
1. the present invention is by the temperature rise of the basic, normal, high rotating speeds at different levels of control lathe main motion system, make bearing in lower temperature range, reach thermal equilibrium, be after main shaft all reaches capacity when each low-speed running, just enter maximum speed then, thereby the situation that temperature sharply rises seldom can appear in main shaft bearing, thereby prevented bearing reach capacity temperature and damage, thereby effectively improved the assembly quality of spindle unit.
2. the present invention has disposed temperature sensor and has gathered the main shaft temperature rise, guarantees the accuracy and the real-time of main shaft temperature, temperature measurement data, increases work efficiency effectively.
3. method of testing of the present invention can be measured and control by computer realization is full-automatic, need not manually-operated, thereby testing efficiency height, accurately and reliably.
4. method of testing of the present invention is simple, be easy to realize, is suitable for applying.
Description of drawings
Accompanying drawing 1 is the test result figure of the embodiment of the invention one;
Accompanying drawing 2 is test result figure of Comparative Examples one of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment one
A kind of method for testing temperature rise of spindle of numerical control lathe comprises the steps:
(1) sets starting velocity, every step velocity lifting values and the maximum speed of main shaft according to the principal parameter of numerically controlled lathe;
(2) temperature of The real time measure main shaft bearing, under each step velocity, when surpassing 0.5 ℃ as if temperature rise in 10 minutes, the control main shaft continues running-in under this step velocity, otherwise present speed is risen to next stage speed;
(3) repeating step (2) reaches maximum speed until main shaft, under maximum speed during running-in, and the temperature of The real time measure main shaft bearing, if temperature rise in 1 hour surpasses 5 ℃, then continue running-in, until meeting above-mentioned temperature rise standard, then this moment, the main shaft bearing temperature reached capacity, and the main shaft temperature rise is qualified, end of test;
If in step (2) and (3), when the main shaft bearing temperature surpasses 70 ℃ or main shaft bearing temperature rise above 35 ℃/h, judge that then the main shaft temperature rise is defective, end of test.
Certainly, can set different temperature rise standards at the numerically controlled lathe of different type of machines, according to the speed of mainshaft of temperature rise situation control numerically controlled lathe,, improve the assembly quality of spindle of numerical control lathe parts by real-time control to the temperature velocity in the dry run process of the test.Described temperature survey can be gathered the main shaft temperature rise by the configuration temperature sensor, guarantees the accuracy and the real-time of main shaft temperature, temperature measurement data.
Above, the temperature rise of the basic, normal, high rotating speeds at different levels by control lathe main motion system, make bearing in lower temperature range, reach thermal equilibrium, promptly when each low-speed running, all level off to after the thermal equilibrium, just enter maximum speed then, thereby at maximum speed lower main axis bearing the situation that temperature sharply rises can appear seldom, thereby bearing reach capacity temperature and damage have been prevented, thereby effectively having improved the assembly quality of spindle unit, this all is extremely important to stability and the reliability that improves the main shaft work in-process.When the main shaft temperature rise test began, heat also had little time to spread out of, and bearing temperature rises gradually; When bearing temperature rose to certain value, the viscosity of grease descended thereupon, and the bearing heating amount descends accordingly, the temperature difference of outer race and cabinet exterior increases simultaneously, and amount of thermal conduction increases simultaneously, and heat dissipation capacity is equal to or greater than thermal value, bearing temperature descends, and reaches thermal equilibrium about a certain temperature.
Test according to such scheme, the front bearing temperature that finally obtains is 39.1 ℃, and the front bearing temperature rise is 16.8 ℃, and shown in accompanying drawing 1, the time of main shaft before reaching maximum speed is also longer.In addition, utilizing spot dynamic balance instrument to carry out spectrum analysis detects, the maximal value that records its speed effective value is 0.25mm/s, as seen the main spindle box assembling that utilizes method of testing of the present invention to obtain is all right, each grade rotating speed of the basic, normal, high speed of main shaft all carried out abundant race and, reduce the influence of bearing running hot effectively to machine tool accuracy, improve bearing life, reduced and assembled bad incidence, controlled the main spindle box assembly quality better.
Comparative Examples one
Lathe spindle in the foregoing description one is carried out the temperature rise test according to the standard method in the background technology, be that JB/T 4368.3-96 " numerical control horizontal lathe technical conditions " tests, the front bearing temperature that finally obtains is 47.8 ℃, and the front bearing temperature rise is 26.9 ℃, shown in accompanying drawing 2.
In sum, main shaft just enters maximum speed after all reaching capacity when each low-speed running in method of testing of the present invention, thereby the temperature of main shaft bearing and temperature rise are lower, the situation that the main shaft bearing temperature sharply rises seldom can appear, thereby prevented bearing reach capacity temperature and damage, also improved the assembly quality of spindle unit simultaneously.
Claims (2)
1. the method for testing temperature rise of a spindle of numerical control lathe is characterized in that, comprises the steps:
(1) sets starting velocity, every step velocity lifting values and the maximum speed of main shaft according to the principal parameter of numerically controlled lathe;
(2) temperature of The real time measure main shaft bearing, under each step velocity, when surpassing design temperature T1 as if temperature rise in the unit interval, the control main shaft continues running-in under this step velocity, otherwise present speed is risen to next stage speed;
(3) repeating step (2) reaches maximum speed until main shaft, under maximum speed during running-in, the temperature of The real time measure main shaft bearing, when if temperature rise surpasses design temperature T2 in the unit interval, then continue running-in, until meeting above-mentioned temperature rise standard, then this moment, the main shaft bearing temperature reached capacity, the main shaft temperature rise is qualified, end of test;
If in step (2) and (3), when the main shaft bearing temperature surpasses 70 ℃ or main shaft bearing temperature rise above 35 ℃/h, judge that then the main shaft temperature rise is defective, end of test.
2. the method for testing temperature rise of spindle of numerical control lathe according to claim 1, it is characterized in that: in the described step (2), under each step velocity, when surpassing 0.5 ℃ as if temperature rise in 10 minutes, the control main shaft continues running-in under this step velocity, otherwise present speed is risen to next stage speed; In the described step (3), during running-in, if temperature rise in 1 hour surpasses 5 ℃, then continue running-in under maximum speed, less than 5 ℃/hour, then this moment, the main shaft bearing temperature reached capacity until temperature rise, and the main shaft temperature rise is qualified, end of test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102317424A CN101710002B (en) | 2009-12-03 | 2009-12-03 | Method for testing temperature rise of spindle of numerical control lathe |
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| CN2009102317424A CN101710002B (en) | 2009-12-03 | 2009-12-03 | Method for testing temperature rise of spindle of numerical control lathe |
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| CN101710002A true CN101710002A (en) | 2010-05-19 |
| CN101710002B CN101710002B (en) | 2011-12-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674504A (en) * | 2012-08-31 | 2014-03-26 | 沈阳机床(集团)有限责任公司 | Main shaft performance testing platform |
| CN107843351A (en) * | 2017-11-01 | 2018-03-27 | 南通欧科数控设备有限公司 | A kind of method for testing temperature rise of spindle of numerical control lathe |
| CN110571985A (en) * | 2019-09-11 | 2019-12-13 | 深圳市速锋科技股份有限公司 | Preheating running-in method of high-speed electric spindle |
| CN115056036A (en) * | 2022-07-13 | 2022-09-16 | 浙江金火科技实业有限公司 | Spindle box part detection device on numerical control lathe |
-
2009
- 2009-12-03 CN CN2009102317424A patent/CN101710002B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674504A (en) * | 2012-08-31 | 2014-03-26 | 沈阳机床(集团)有限责任公司 | Main shaft performance testing platform |
| CN103674504B (en) * | 2012-08-31 | 2017-02-01 | 沈阳机床(集团)有限责任公司 | Main shaft performance testing platform |
| CN107843351A (en) * | 2017-11-01 | 2018-03-27 | 南通欧科数控设备有限公司 | A kind of method for testing temperature rise of spindle of numerical control lathe |
| CN110571985A (en) * | 2019-09-11 | 2019-12-13 | 深圳市速锋科技股份有限公司 | Preheating running-in method of high-speed electric spindle |
| CN110571985B (en) * | 2019-09-11 | 2022-01-21 | 深圳市速锋科技股份有限公司 | Preheating running-in method of high-speed electric spindle |
| CN115056036A (en) * | 2022-07-13 | 2022-09-16 | 浙江金火科技实业有限公司 | Spindle box part detection device on numerical control lathe |
| CN115056036B (en) * | 2022-07-13 | 2024-05-07 | 浙江金火科技实业有限公司 | Main spindle box part detection device on numerical control lathe |
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| CN101710002B (en) | 2011-12-28 |
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Address after: No. 69, Xunyangjiang Road, Tongan, Suzhou High-tech Zone, Jiangsu Province Patentee after: Newway CNC Equipment (Suzhou) Co., Ltd. Address before: 215129 No. 69 Xunyangjiang Road, Suzhou High-tech Zone, Suzhou City, Jiangsu Province Patentee before: Neway CNC Equipment (Suzhou) Co., Ltd. |