CN102062700A - Method for detecting early faults of end-toothed disc B-axis turntable in horizontal processing center - Google Patents
Method for detecting early faults of end-toothed disc B-axis turntable in horizontal processing center Download PDFInfo
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Abstract
The invention discloses a method for detecting early faults of an end-toothed disc B-axis turntable in a horizontal processing center, comprising the following steps of: carrying out a no-load test to perform the test run performance detection of the end-toothed disc B-axis turntable so as to find out remarkable assembly defect; carrying out a maximum load test, monitoring a vibration parameter and the conditions of hydraulic leakage and pressure fluctuation, that is to say, monitoring the parameters of the end-toothed disc B-axis turntable during continuous work under the condition of severer work environment to find the potential defect of the end-toothed disc B-axis turntable; and finally, detaching and cleaning the end-toothed disc B-axis turntable after the test is finished and analyzing the internal wear condition. If the defect can be eliminated, the tested end-toothed disc B-axis turntable can be reassembled into a complete machine of a machine tool after the fault is eliminated. Therefore, the probability that the end-toothed disc B-axis turntable of the machine tool leaving the factory has the early fault is greatly reduced.
Description
Technical field
The present invention relates to a kind of is the fault detection method of purpose to excite early stage machine failure, relates in particular to a kind of end-toothed disc B axle turntable as horizontal Machining centers critical function parts, carries out the method that initial failure detects at its machinery, hydraulic part.
Background technology
The horizontal Machining centers lathe is complicated mechanical, electrical, liquid, gas integral system, mainly by frame, automatic tool changer (tool magazine is arranged), axis system, pallet exchange system, B axle turntable and other hydraulic pressure, pneumatic and automatically controlled (digital control system) part formation.According to the result who lathe is followed the tracks of statistics, in use, its inefficacy and the probability that breaks down were tub curve in time and distribute after lathe dispatched from the factory.Have an earlier failure period after lathe dispatches from the factory, in this time period, the probability that lathe breaks down is bigger, and this fault is called initial failure.
In the horizontal Machining centers lathe, the B axle turntable of end-toothed disc structure is the critical function parts of horizontal Machining centers lathe, carrying workpiece when it is machine tooling, and can be around the worktable of B axle rotation, its primary structure is that motor drives the turntable rotation by worm couple, it is the elevating function of power that turntable has with the hydraulic cylinder, end-toothed disc broke away from engagement when turntable rose, this moment, turntable can rotate to the angle that digital control system is set, upper and lower side fluted disc engagement when falling, it is locked that the end-toothed disc of engagement makes machine cut add the man-hour turntable, no longer rotates.This functional part rotates freely when requiring turntable to rise, lifting is flexible, and noise is little, and the end-toothed disc engagement reliably, accurately when turntable was fallen.As the critical function parts of horizontal Machining centers lathe, its reliability is very big to the reliability effect of lathe complete machine, according to statistics, in the lathe initial failure very major part appear on the end-toothed disc B axle turntable.
For this reason, by test it is carried out initial failure and excite, with the latent defect that processing, assembling and the design of finding this functional part before it is put into the lathe complete machine causes, significant.At present, about B axle turntable to horizontal Machining centers lathe end-toothed disc structure, carrying out to excite initial failure is that the reliability test method of purpose does not also have, and can't guarantee to attach it to the reliability on the complete machine, therefore also just can't guarantee the reliability of horizontal Machining centers complete machine.
A kind ofly can excite end-toothed disc B axle turntable initial failure so how to design, with the initial failure detection method of discovery end-toothed disc B axle turntable latent defect lathe dispatches from the factory before, becoming this area has problem to be solved.
Summary of the invention
The technical problem to be solved in the present invention is, at above-mentioned deficiency, a kind of horizontal Machining centers end-toothed disc B axle turntable initial failure detection method that can excite end-toothed disc B axle turntable initial failure is provided, thereby finds out end-toothed disc B axle turntable latent defect, for the raising lathe reliability of dispatching from the factory creates conditions.
In order to solve the problems of the technologies described above, adopted following technical scheme among the present invention:
A kind of horizontal Machining centers end-toothed disc B axle turntable initial failure detection method, its characteristics are, may further comprise the steps
(1) no-load running test procedure: with performance, the qualified end-toothed disc B axle turntable parts of the accuracy test complete machine of directly packing into, connect electric wiring and fluid pressure line, and move following running program: 1. turntable rotates a circle; 2. turntable rises; 3. turntable is fallen; Repeat 1. 2. 3. to move cycle operation like this, continue to stop after 2 hours, test ambient temperature is 10 ℃～40 ℃; Do not add heavy burden load during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than in 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Discovery requires that hydraulic system occur to be leaked, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
Do not judge as step (1) and to have defective, then carry out following step (2);
(2) the heavy burden piece is installed, is fixed on the turntable, simulation adds the cutting workpiece in man-hour, carries out big load operation test.The turntable running program is during test: 1. turntable rotates a circle, 2. turntable rises, time-delay 5 seconds, 3. turntable was fallen, delay time 2 seconds, repeated 1. 2. 3. to move cycle operation like this, lastingly stops after 72 hours, and environment temperature is 10 ℃～40 ℃; Heavy burden load is design maximum during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than in 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Discovery requires that hydraulic system occur to be leaked, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
Do not judge as step (2) and to have defective, then carry out following step (3);
(3) dismounting checking procedure: end-toothed disc B axle turntable is dismantled, cleaned, analyze the kinematic train abrasion condition; If fluted disc back lash, test side exceeds 0.05～0.1mm, then judge to have defective; If the abrasion condition of bearing does not satisfy the bearing technology requirement, then judge to have defective; If damaged, pinning phenomenon appear in worm couple, then judge to have defective.
Detection method of the present invention is after end-toothed disc B axle turntable is carried out failure mode analysis (FMA) and tub curve quantitative analysis, draws.The actual working state of this method analog end fluted disc B axle turntable on the horizontal Machining centers lathe carries out maximum environmental stress continuous running, and end-toothed disc B axle turntable initial failure is excited and detects.Test method of the present invention is at first carried out no-load test, detects so that end-toothed disc B axle turntable performance is done trial run, to find significantly to assemble defective; Carry out maximum load test again, monitoring vibration parameter and hydraulic leak and pressure surge situation, mainly be at working environment than under the condition of severe, by parameter monitoring, find its latent defect to end-toothed disc B axle turntable running hours; At last, after test finishes it is carried out disassembly, cleaning, analyze the inter deterioration situation.In each step, judge defective after, can carry out artificial treatment and eliminating, if can not get rid of, then can allow this end-toothed disc B axle turntable forbid dispatching from the factory, if can get rid of, can proceed the detection of subsequent step after then fixing a breakdown.End-toothed disc B axle turntable after the test if can eliminate defective, can be ressembled after then eliminating fault, in the lathe complete machine of packing into.Like this, the probability that initial failure appears in the end-toothed disc B axle turntable of lathe that can guarantee to dispatch from the factory reduces greatly.
In sum, by method of the present invention, can be by the method for test, to horizontal Machining centers important function parts---end-toothed disc B axle turntable carries out initial failure and excites, find the latent defect of manufacturing process or design, thereby for the reliability that improves functional part and lathe complete machine provides practical approach, the probability that initial failure appears in the end-toothed disc B axle turntable of the lathe that assurance is dispatched from the factory reduces greatly.Whether this method can also exist defective that reference frame is provided when designing for lathe simultaneously, so that Machine Tool design is improved.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment.
During concrete enforcement, this method is suitable for implementing in the end-toothed disc B of the horizontal Machining centers lathe that a existing model is THM6380 axle turntable especially.Specifically may further comprise the steps.
(1) no-load running test procedure: with performance, the qualified end-toothed disc B axle turntable parts of the accuracy test complete machine of directly packing into, connect electric wiring and fluid pressure line, and move following running program: 1. turntable rotates a circle; 2. turntable rises; 3. turntable is fallen; Repeat 1. 2. 3. to move cycle operation like this, continue to stop after 2 hours, test ambient temperature is 10 ℃～40 ℃; Do not add heavy burden load during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than in 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Discovery requires that hydraulic system occur to be leaked, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
In the above-mentioned steps (1), environmental stress conditions specifically can be set to: environment temperature is 10 ℃～40 ℃, and test heavy burden load is 0, and rotational speed is 12 rev/mins, and the lifting hydraulic pressure is 5Mpa, and flow is 8L/min.
Do not judge as step (1) and to have defective, then carry out following step (2);
(2) the heavy burden piece is installed, is fixed on the turntable, simulation adds the cutting workpiece in man-hour, carries out big load operation test.The turntable running program is during test: 1. turntable rotates a circle, 2. turntable rises, time-delay 5 seconds, 3. turntable was fallen, delay time 2 seconds, repeated 1. 2. 3. to move cycle operation like this, lastingly stops after 72 hours, and environment temperature is 10 ℃～40 ℃; Heavy burden load is design maximum during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than in 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Discovery requires that hydraulic system occur to be leaked, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
In the above-mentioned steps (2), environmental stress conditions specifically can be set to: environment temperature is 10 ℃～40 ℃, and test heavy burden load is 1000Kg, and rotational speed is 12 rev/mins, and the lifting hydraulic pressure is 5Mpa, and flow is 8L/min.
Do not judge as step (2) and to have defective, then carry out following step (3);
(3) dismounting checking procedure: end-toothed disc B axle turntable is dismantled, cleaned, analyze the kinematic train abrasion condition; If fluted disc back lash, test side exceeds 0.05～0.1mm, then judge to have defective; If the abrasion condition of bearing does not satisfy the bearing technology requirement, then judge to have defective; If damaged, pinning phenomenon appear in worm couple, then judge to have defective.
In the above steps, as judge have defective after, can manually check and repair, can continue subsequent step after the reparation, if can not repair, then this end-toothed disc B axle turntable can not assemble and dispatch from the factory.
At last; it should be noted that; above embodiment only is used for explanation; and unrestricted technology implementation scheme of the present invention; although the present invention is had been described in detail with reference to the foregoing description; those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not break away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in protection scope of the present invention.
Claims (1)
1. a horizontal Machining centers end-toothed disc B axle turntable initial failure detection method is characterized in that, may further comprise the steps
(1) no-load running test procedure: with performance, the qualified end-toothed disc B axle turntable parts of the accuracy test complete machine of directly packing into, connect electric wiring and fluid pressure line, and move following running program: 1. turntable rotates a circle; 2. turntable rises; 3. turntable is fallen; Repeat 1. 2. 3. to move cycle operation like this, continue to stop after 2 hours, test ambient temperature is 10 ℃～40 ℃; Do not add heavy burden load during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than in 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Leaking appears in the discovery hydraulic system, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
Do not judge as step (1) and to have defective, then carry out following step (2);
(2) the heavy burden piece is installed, is fixed on the turntable, add the workpiece in man-hour, carry out big load operation test as simulation,
The turntable running program is during test: 1. turntable rotates a circle, 2. turntable rises, time-delay 5 seconds, 3. turntable was fallen, delay time 2 seconds, repeated 1. 2. 3. to move cycle operation like this, lastingly stops after 72 hours, and environment temperature is 10 ℃～40 ℃; Heavy burden load is design maximum during test, maximum speed when rotational speed is turret design, lifting hydraulic pressure and flow are chosen by design maximum, monitoring worm couple installation place is perpendicular to the vibration acceleration size and the fundamental frequency of work top direction in the process of the test, whether hydraulic system leakage of oil and running noise situation, and judge according to following judgment principle: if monitor out the worm couple installation place perpendicular to the vibration acceleration peak value of work top direction greater than 0.2g, fundamental frequency greater than 0.1Hz or fundamental frequency amplitude exceed-10dB～+ the 10dB scope, then judge to have defective; Leaking appears in the discovery hydraulic system, lifting hydraulic cylinder pressure surge value exceeds-0.08MPa～+ the 0.08MPa scope, then judge to have defective;
Do not judge as step (2) and to have defective, then carry out following step (3);
(3) dismounting checking procedure: end-toothed disc B axle turntable is dismantled, cleaned, analyze the kinematic train abrasion condition; If fluted disc back lash, test side exceeds 0.05～0.1mm, then judge to have defective; If the abrasion condition of bearing does not satisfy the bearing technology requirement, then judge to have defective; If damaged, pinning phenomenon appear in worm couple, then judge to have defective.
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| CN201010604306A CN102062700B (en) | 2010-12-24 | 2010-12-24 | Method for detecting early faults of end-toothed disc B-axis turntable in horizontal processing center |
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| CN201010604306A CN102062700B (en) | 2010-12-24 | 2010-12-24 | Method for detecting early faults of end-toothed disc B-axis turntable in horizontal processing center |
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Cited By (7)
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| CN104408310A (en) * | 2014-11-25 | 2015-03-11 | 电子科技大学 | Mechanical device programmed frequency amplitude modulation (PFAM) structuring decomposition method |
| CN104656633A (en) * | 2014-12-23 | 2015-05-27 | 重庆大学 | Detecting method for early failure of logistics trolley of flexible manufacturing system |
| CN105522404A (en) * | 2016-02-04 | 2016-04-27 | 重庆大学 | Assembling method for end-toothed disc B shaft rotary table of horizontal machining center |
| CN110646197A (en) * | 2018-06-26 | 2020-01-03 | 株式会社神户制钢所 | Rotating machine abnormality processing device and rotating machine system |
| CN111337246A (en) * | 2020-03-26 | 2020-06-26 | 海安市申菱电器制造有限公司 | Dynamic performance evaluation and optimization method for arc-shaped tooth surface worm speed reducer |
| CN114264461A (en) * | 2021-12-15 | 2022-04-01 | 吉林大学 | Reliability test device and method for rotary tray exchanger |
| CN114354075A (en) * | 2022-01-26 | 2022-04-15 | 苏州古田自动化科技有限公司 | Numerical control turntable detection equipment and detection method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104408310A (en) * | 2014-11-25 | 2015-03-11 | 电子科技大学 | Mechanical device programmed frequency amplitude modulation (PFAM) structuring decomposition method |
| CN104656633A (en) * | 2014-12-23 | 2015-05-27 | 重庆大学 | Detecting method for early failure of logistics trolley of flexible manufacturing system |
| CN104656633B (en) * | 2014-12-23 | 2017-04-26 | 重庆大学 | Detecting method for early failure of logistics trolley of flexible manufacturing system |
| CN105522404A (en) * | 2016-02-04 | 2016-04-27 | 重庆大学 | Assembling method for end-toothed disc B shaft rotary table of horizontal machining center |
| CN105522404B (en) * | 2016-02-04 | 2017-07-25 | 重庆大学 | A kind of assembly method of horizontal Machining centers end-toothed disc B axle turntable |
| CN110646197A (en) * | 2018-06-26 | 2020-01-03 | 株式会社神户制钢所 | Rotating machine abnormality processing device and rotating machine system |
| CN110646197B (en) * | 2018-06-26 | 2022-01-04 | 株式会社神户制钢所 | Rotating machine abnormality processing device and rotating machine system |
| CN111337246A (en) * | 2020-03-26 | 2020-06-26 | 海安市申菱电器制造有限公司 | Dynamic performance evaluation and optimization method for arc-shaped tooth surface worm speed reducer |
| CN114264461A (en) * | 2021-12-15 | 2022-04-01 | 吉林大学 | Reliability test device and method for rotary tray exchanger |
| CN114264461B (en) * | 2021-12-15 | 2023-12-26 | 吉林大学 | Rotary tray exchanger reliability test device and method |
| CN114354075A (en) * | 2022-01-26 | 2022-04-15 | 苏州古田自动化科技有限公司 | Numerical control turntable detection equipment and detection method thereof |
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